mirror of
https://github.com/foomo/foomo-docs.git
synced 2025-10-16 12:35:40 +00:00
32 lines
51 KiB
HTML
32 lines
51 KiB
HTML
<!doctype html>
|
||
<html lang="en" dir="ltr" class="docs-wrapper docs-doc-page docs-version-current plugin-docs plugin-id-default docs-doc-id-backend/go-by-example/files">
|
||
<head>
|
||
<meta charset="UTF-8">
|
||
<meta name="generator" content="Docusaurus v2.4.1">
|
||
<title data-rh="true">Files | foomo project docs</title><meta data-rh="true" name="viewport" content="width=device-width,initial-scale=1"><meta data-rh="true" name="twitter:card" content="summary_large_image"><meta data-rh="true" property="og:url" content="https://www.foomo.org/docs/backend/go-by-example/files"><meta data-rh="true" name="docusaurus_locale" content="en"><meta data-rh="true" name="docsearch:language" content="en"><meta data-rh="true" name="docusaurus_version" content="current"><meta data-rh="true" name="docusaurus_tag" content="docs-default-current"><meta data-rh="true" name="docsearch:version" content="current"><meta data-rh="true" name="docsearch:docusaurus_tag" content="docs-default-current"><meta data-rh="true" property="og:title" content="Files | foomo project docs"><meta data-rh="true" name="description" content="There are multiple packages we can utilize for reading files in a go program. We'll go over the most commonly used ones in this section."><meta data-rh="true" property="og:description" content="There are multiple packages we can utilize for reading files in a go program. We'll go over the most commonly used ones in this section."><link data-rh="true" rel="icon" href="/img/favicon.ico"><link data-rh="true" rel="canonical" href="https://www.foomo.org/docs/backend/go-by-example/files"><link data-rh="true" rel="alternate" href="https://www.foomo.org/docs/backend/go-by-example/files" hreflang="en"><link data-rh="true" rel="alternate" href="https://www.foomo.org/docs/backend/go-by-example/files" hreflang="x-default"><link data-rh="true" rel="preconnect" href="https://SUATUVZDDM-dsn.algolia.net" crossorigin="anonymous"><link rel="alternate" type="application/rss+xml" href="/blog/rss.xml" title="foomo project docs RSS Feed">
|
||
<link rel="alternate" type="application/atom+xml" href="/blog/atom.xml" title="foomo project docs Atom Feed">
|
||
|
||
|
||
|
||
<link rel="search" type="application/opensearchdescription+xml" title="foomo project docs" href="/opensearch.xml"><link rel="stylesheet" href="/assets/css/styles.a204f99f.css">
|
||
<link rel="preload" href="/assets/js/runtime~main.2b2cf787.js" as="script">
|
||
<link rel="preload" href="/assets/js/main.5c774faa.js" as="script">
|
||
</head>
|
||
<body class="navigation-with-keyboard">
|
||
<script>!function(){function t(t){document.documentElement.setAttribute("data-theme",t)}var e=function(){var t=null;try{t=new URLSearchParams(window.location.search).get("docusaurus-theme")}catch(t){}return t}()||function(){var t=null;try{t=localStorage.getItem("theme")}catch(t){}return t}();t(null!==e?e:"light")}()</script><div id="__docusaurus">
|
||
<div role="region" aria-label="Skip to main content"><a class="skipToContent_fXgn" href="#__docusaurus_skipToContent_fallback">Skip to main content</a></div><nav aria-label="Main" class="navbar navbar--fixed-top"><div class="navbar__inner"><div class="navbar__items"><button aria-label="Toggle navigation bar" aria-expanded="false" class="navbar__toggle clean-btn" type="button"><svg width="30" height="30" viewBox="0 0 30 30" aria-hidden="true"><path stroke="currentColor" stroke-linecap="round" stroke-miterlimit="10" stroke-width="2" d="M4 7h22M4 15h22M4 23h22"></path></svg></button><a class="navbar__brand" href="/"><b class="navbar__title text--truncate">foomo</b></a><a class="navbar__item navbar__link" href="/docs/general">General</a><a class="navbar__item navbar__link" href="/docs/frontend">Frontend</a><a aria-current="page" class="navbar__item navbar__link navbar__link--active" href="/docs/backend">Backend</a><a class="navbar__item navbar__link" href="/docs/devops">DevOps</a><a class="navbar__item navbar__link" href="/docs/projects">Projects</a></div><div class="navbar__items navbar__items--right"><a class="navbar__item navbar__link" href="/blog">Blog</a><div class="searchBox_ZlJk"><button type="button" class="DocSearch DocSearch-Button" aria-label="Search"><span class="DocSearch-Button-Container"><svg width="20" height="20" class="DocSearch-Search-Icon" viewBox="0 0 20 20"><path d="M14.386 14.386l4.0877 4.0877-4.0877-4.0877c-2.9418 2.9419-7.7115 2.9419-10.6533 0-2.9419-2.9418-2.9419-7.7115 0-10.6533 2.9418-2.9419 7.7115-2.9419 10.6533 0 2.9419 2.9418 2.9419 7.7115 0 10.6533z" stroke="currentColor" fill="none" fill-rule="evenodd" stroke-linecap="round" stroke-linejoin="round"></path></svg><span class="DocSearch-Button-Placeholder">Search</span></span><span class="DocSearch-Button-Keys"></span></button></div></div></div><div role="presentation" class="navbar-sidebar__backdrop"></div></nav><div id="__docusaurus_skipToContent_fallback" class="main-wrapper mainWrapper_z2l0 docsWrapper_BCFX"><button aria-label="Scroll back to top" class="clean-btn theme-back-to-top-button backToTopButton_sjWU" type="button"></button><div class="docPage__5DB"><aside class="theme-doc-sidebar-container docSidebarContainer_b6E3"><div class="sidebarViewport_Xe31"><div class="sidebar_njMd"><nav aria-label="Docs sidebar" class="menu thin-scrollbar menu_SIkG"><ul class="theme-doc-sidebar-menu menu__list"><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-1 menu__list-item"><a class="menu__link" href="/docs/backend">Backend Guide</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-1 menu__list-item"><a class="menu__link" href="/docs/backend/rtfm">RTFM</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-1 menu__list-item"><a class="menu__link" href="/docs/backend/setup">Setup</a></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret menu__link--active" aria-expanded="true" href="/docs/backend/go-by-example/defer">Go by example</a></div><ul style="display:block;overflow:visible;height:auto" class="menu__list"><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/docs/backend/go-by-example/defer">Defer</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/docs/backend/go-by-example/panic-and-recover">Panic and Recover</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/docs/backend/go-by-example/nil-maps">Maps</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/docs/backend/go-by-example/ranging">Ranging and Looping</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/docs/backend/go-by-example/cli-applications">CLI applications</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/docs/backend/go-by-example/context">Context</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/docs/backend/go-by-example/embed">Embed</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link menu__link--active" aria-current="page" tabindex="0" href="/docs/backend/go-by-example/files">Files</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/docs/backend/go-by-example/goroutines-and-channels">Go Routines and Channels</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/docs/backend/go-by-example/http">HTTP Client and Server</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/docs/backend/go-by-example/interfaces">Interfaces</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/docs/backend/go-by-example/map-racing">Map Races</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/docs/backend/go-by-example/mongodb">MongoDB</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/docs/backend/go-by-example/reflection">Reflection</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/docs/backend/go-by-example/type-casting">Type Casting</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/docs/backend/go-by-example/waitgroups">waitgroups</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/docs/backend/go-by-example/yaml-magic">Yaml magic</a></li></ul></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-1 menu__list-item"><a class="menu__link" href="/docs/backend/gograpple">Gograpple</a></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist" aria-expanded="false" href="/docs/backend/profiling">Profiling Go applications</a><button aria-label="Toggle the collapsible sidebar category 'Profiling Go applications'" type="button" class="clean-btn menu__caret"></button></div></li></ul></nav></div></div></aside><main class="docMainContainer_gTbr"><div class="container padding-top--md padding-bottom--lg"><div class="row"><div class="col docItemCol_VOVn"><div class="docItemContainer_Djhp"><article><nav class="theme-doc-breadcrumbs breadcrumbsContainer_Z_bl" aria-label="Breadcrumbs"><ul class="breadcrumbs" itemscope="" itemtype="https://schema.org/BreadcrumbList"><li class="breadcrumbs__item"><a aria-label="Home page" class="breadcrumbs__link" href="/"><svg viewBox="0 0 24 24" class="breadcrumbHomeIcon_YNFT"><path d="M10 19v-5h4v5c0 .55.45 1 1 1h3c.55 0 1-.45 1-1v-7h1.7c.46 0 .68-.57.33-.87L12.67 3.6c-.38-.34-.96-.34-1.34 0l-8.36 7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill="currentColor"></path></svg></a></li><li class="breadcrumbs__item"><span class="breadcrumbs__link">Go by example</span><meta itemprop="position" content="1"></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">Files</span><meta itemprop="position" content="2"></li></ul></nav><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><h1>Files</h1><p>There are multiple packages we can utilize for reading files in a go program. We'll go over the most commonly used ones in this section.
|
||
These include: <code>os</code>, <code>io</code>, <code>ioutil</code> and <code>bufio</code>. We'll go over some commonly used methods for each of these packages in this section.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="ioutil">IOUtil<a href="#ioutil" class="hash-link" aria-label="Direct link to IOUtil" title="Direct link to IOUtil"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="read-whole-file">Read Whole File<a href="#read-whole-file" class="hash-link" aria-label="Direct link to Read Whole File" title="Direct link to Read Whole File"></a></h3><p>To read a whole file you can use the <code>ReadFile</code> function.</p><div class="language-go codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-go codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic">// Takes a filepath as argument</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic">// Returns a byteslice and an error</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">byteslice</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> err </span><span class="token operator" style="color:rgb(137, 221, 255)">:=</span><span class="token plain"> ioutil</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">ReadFile</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token plain">filepath</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h2 class="anchor anchorWithStickyNavbar_LWe7" id="os">OS<a href="#os" class="hash-link" aria-label="Direct link to OS" title="Direct link to OS"></a></h2><p>The <code>os</code> package provides and interface with methods to handle files on your operating system in go. </p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="open-files">Open Files<a href="#open-files" class="hash-link" aria-label="Direct link to Open Files" title="Direct link to Open Files"></a></h3><p>To open a file using the <code>os</code> package, use the Open method. This method takes a filepath and returns the opened file and an error.</p><div class="language-go codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-go codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">file</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> err </span><span class="token operator" style="color:rgb(137, 221, 255)">:=</span><span class="token plain"> os</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">Open</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token plain">filepath</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="reading-files">Reading Files<a href="#reading-files" class="hash-link" aria-label="Direct link to Reading Files" title="Direct link to Reading Files"></a></h3><p>To read a file using the <code>os</code> package, use the ReadFile method. This method takes a filepath and returns the contents of the file in a byteslice and an error.</p><div class="language-go codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-go codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">byteslice</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> err </span><span class="token operator" style="color:rgb(137, 221, 255)">:=</span><span class="token plain"> os</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">ReadFile</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token plain">filepath</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="writing-files">Writing Files<a href="#writing-files" class="hash-link" aria-label="Direct link to Writing Files" title="Direct link to Writing Files"></a></h3><h3 class="anchor anchorWithStickyNavbar_LWe7" id="getting-file-information">Getting File Information<a href="#getting-file-information" class="hash-link" aria-label="Direct link to Getting File Information" title="Direct link to Getting File Information"></a></h3><p>To get information about a file using the <code>os</code> package, use the Stat method. This method takes a filepath and information of the selected file and an error.
|
||
This information includes methods: Name() to get the name of the file, Size() to get the size the file in bytes, Mode() to get the mode of the file,
|
||
IsDir() to find out if it is a directory, ModTime() showing when the file was last modified, and Sys() describing the underlying data source.</p><div class="language-go codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-go codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">fileInfo</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> err </span><span class="token operator" style="color:rgb(137, 221, 255)">:=</span><span class="token plain"> os</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">Stat</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token plain">filepath</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h2 class="anchor anchorWithStickyNavbar_LWe7" id="bufio">BufIO<a href="#bufio" class="hash-link" aria-label="Direct link to BufIO" title="Direct link to BufIO"></a></h2><p>Sometimes opening a whole file is not ideal, this is for example when you have a very large log file. All of it is going to be opened in memory.
|
||
For these cases you can buffer the IO, this can increase the speed of your application by reducing the number of system calls made.
|
||
Bufio provides ways to read by the file in batches. Commonly used methods in the bufIO package include: <code>Scanner</code>, <code>ReadSlice</code>,<code>ReadBytes</code> and <code>ReadLines</code>.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="scanner">Scanner<a href="#scanner" class="hash-link" aria-label="Direct link to Scanner" title="Direct link to Scanner"></a></h3><p>Breaks the data up in tokens. Open the file with the <code>os</code> Open function and pass the reader to the NewScanner function. This will return a pointer to a Scanner.</p><div class="language-go codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-go codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">myScanner </span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain"> bufio</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">NewScanner</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token plain">myIOReader</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="readslice">ReadSlice<a href="#readslice" class="hash-link" aria-label="Direct link to ReadSlice" title="Direct link to ReadSlice"></a></h3><p>This function returns a slice of the passed string based on the delimiter you pass it.
|
||
It will return every slice with the delimiter. To call it initialize a new reader with the specified string and pass the ReadSlice method a delimiter.</p><div style="padding-bottom:1rem;width:100%"><button class="button button--primary">open playground</button> <a href="https://goplay.tools/snippet/0ZFnnUjBk6l" target="_blank" rel="noopener noreferrer">go to <!-- -->https://goplay.tools/snippet/0ZFnnUjBk6l</a></div><pre class="prism-code language-go" style="background-color:#2a2734;color:#9a86fd">... loading sources<div class="token-line" style="color:#9a86fd"><span class="token plain" style="display:inline-block">
|
||
</span></div></pre><div style="display:none"><div><button class="button button--lg button--secondary">load external go playground, with all it´s potentially evil cookies coming from https://goplay.tools</button></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="readbytes">ReadBytes<a href="#readbytes" class="hash-link" aria-label="Direct link to ReadBytes" title="Direct link to ReadBytes"></a></h3><p>ReadBytes builds on the ReadSlice functionality and is called in a similar fashion. The difference is that ReadSlice is bound to a buffersize, if it does
|
||
not reach the delimiter within that size it will fail. ReadBytes is able to call ReadSlice multiple times which means that if you go over the buffersize
|
||
it won't encounter a problem. To demonstrate:</p><div style="padding-bottom:1rem;width:100%"><button class="button button--primary">open playground</button> <a href="https://goplay.tools/snippet/Jl9B6I1a8d-" target="_blank" rel="noopener noreferrer">go to <!-- -->https://goplay.tools/snippet/Jl9B6I1a8d-</a></div><pre class="prism-code language-go" style="background-color:#2a2734;color:#9a86fd">... loading sources<div class="token-line" style="color:#9a86fd"><span class="token plain" style="display:inline-block">
|
||
</span></div></pre><div style="display:none"><div><button class="button button--lg button--secondary">load external go playground, with all it´s potentially evil cookies coming from https://goplay.tools</button></div></div><h2 class="anchor anchorWithStickyNavbar_LWe7" id="examples">Examples<a href="#examples" class="hash-link" aria-label="Direct link to Examples" title="Direct link to Examples"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="read-lines">Read Lines<a href="#read-lines" class="hash-link" aria-label="Direct link to Read Lines" title="Direct link to Read Lines"></a></h3><p>The following code provides a way to read lines from a file. It uses the <code>os</code> package to open the file and then <code>bufio</code> to create a scanner
|
||
that reads the file line by line.</p><div class="language-go codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-go codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token keyword" style="font-style:italic">package</span><span class="token plain"> main</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token keyword" style="font-style:italic">import</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"fmt"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"os"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"bufio"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token keyword" style="font-style:italic">func</span><span class="token plain"> </span><span class="token function" style="color:rgb(130, 170, 255)">main</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> file</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> err </span><span class="token operator" style="color:rgb(137, 221, 255)">:=</span><span class="token plain"> os</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">Open</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token plain">filepath</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token keyword" style="font-style:italic">if</span><span class="token plain"> err </span><span class="token operator" style="color:rgb(137, 221, 255)">!=</span><span class="token plain"> </span><span class="token boolean" style="color:rgb(255, 88, 116)">nil</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> fmt</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">Println</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token string" style="color:rgb(195, 232, 141)">"Error:"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> err</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">Error</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token keyword" style="font-style:italic">return</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token keyword" style="font-style:italic">defer</span><span class="token plain"> os</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">Close</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic">// Make sure to always close your resources</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> scanner </span><span class="token operator" style="color:rgb(137, 221, 255)">:=</span><span class="token plain"> bufio</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">NewScanner</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token plain">file</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token keyword" style="font-style:italic">for</span><span class="token plain"> scanner</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">Scan</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic">// returns a boolean, so until the end of the file is reached this loop will run</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> fmt</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">Println</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token plain">scanner</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">Text</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="read-bytes">Read Bytes<a href="#read-bytes" class="hash-link" aria-label="Direct link to Read Bytes" title="Direct link to Read Bytes"></a></h3><div class="language-go codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-go codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token keyword" style="font-style:italic">package</span><span class="token plain"> main</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token keyword" style="font-style:italic">import</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"fmt"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"os"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"bufio"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"io"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token keyword" style="font-style:italic">func</span><span class="token plain"> </span><span class="token function" style="color:rgb(130, 170, 255)">main</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> fileHandler</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> err </span><span class="token operator" style="color:rgb(137, 221, 255)">:=</span><span class="token plain"> os</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">Open</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token plain">filename</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token keyword" style="font-style:italic">if</span><span class="token plain"> err </span><span class="token operator" style="color:rgb(137, 221, 255)">!=</span><span class="token plain"> </span><span class="token boolean" style="color:rgb(255, 88, 116)">nil</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> fmt</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">Println</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token string" style="color:rgb(195, 232, 141)">"Error:"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> err</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">Error</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token keyword" style="font-style:italic">return</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token keyword" style="font-style:italic">defer</span><span class="token plain"> os</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">Close</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic">// Make sure to always close your resources</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> myBuffer </span><span class="token operator" style="color:rgb(137, 221, 255)">:=</span><span class="token plain"> </span><span class="token function" style="color:rgb(130, 170, 255)">make</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token punctuation" style="color:rgb(199, 146, 234)">[</span><span class="token punctuation" style="color:rgb(199, 146, 234)">]</span><span class="token builtin" style="color:rgb(130, 170, 255)">byte</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> size</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic">// Make a buffer with size of size</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token keyword" style="font-style:italic">for</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"> </span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> readBytes</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> err </span><span class="token operator" style="color:rgb(137, 221, 255)">:=</span><span class="token plain"> fileHandler</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">Read</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token plain">buf</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"> </span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token keyword" style="font-style:italic">if</span><span class="token plain"> err </span><span class="token operator" style="color:rgb(137, 221, 255)">!=</span><span class="token plain"> </span><span class="token boolean" style="color:rgb(255, 88, 116)">nil</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token keyword" style="font-style:italic">if</span><span class="token plain"> err </span><span class="token operator" style="color:rgb(137, 221, 255)">!=</span><span class="token plain"> io</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token plain">EOF </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> fmt</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">Println</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token string" style="color:rgb(195, 232, 141)">"Error:"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> err</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">Error</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token keyword" style="font-style:italic">return</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token keyword" style="font-style:italic">break</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> fmt</span><span class="token punctuation" style="color:rgb(199, 146, 234)">.</span><span class="token function" style="color:rgb(130, 170, 255)">Println</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token function" style="color:rgb(130, 170, 255)">string</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token plain">myBuffer</span><span class="token punctuation" style="color:rgb(199, 146, 234)">[</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain">readBytes</span><span class="token punctuation" style="color:rgb(199, 146, 234)">]</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-tags-row row margin-bottom--sm"><div class="col"><b>Tags:</b><ul class="tags_jXut padding--none margin-left--sm"><li class="tag_QGVx"><a class="tag_zVej tagRegular_sFm0" href="/docs/tags/go-basics">Go Basics</a></li></ul></div></div><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a href="https://github.com/foomo/foomo-docs/tree/main/foomo/docs/backend/go-by-example/files.mdx" target="_blank" rel="noreferrer noopener" class="theme-edit-this-page"><svg fill="currentColor" height="20" width="20" viewBox="0 0 40 40" class="iconEdit_Z9Sw" aria-hidden="true"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div><div class="col lastUpdated_vwxv"></div></div></footer></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Docs pages"><a class="pagination-nav__link pagination-nav__link--prev" href="/docs/backend/go-by-example/embed"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">Embed</div></a><a class="pagination-nav__link pagination-nav__link--next" href="/docs/backend/go-by-example/goroutines-and-channels"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">Go Routines and Channels</div></a></nav></div></div><div class="col col--3"><div class="tableOfContents_bqdL thin-scrollbar theme-doc-toc-desktop"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#ioutil" class="table-of-contents__link toc-highlight">IOUtil</a><ul><li><a href="#read-whole-file" class="table-of-contents__link toc-highlight">Read Whole File</a></li></ul></li><li><a href="#os" class="table-of-contents__link toc-highlight">OS</a><ul><li><a href="#open-files" class="table-of-contents__link toc-highlight">Open Files</a></li><li><a href="#reading-files" class="table-of-contents__link toc-highlight">Reading Files</a></li><li><a href="#writing-files" class="table-of-contents__link toc-highlight">Writing Files</a></li><li><a href="#getting-file-information" class="table-of-contents__link toc-highlight">Getting File Information</a></li></ul></li><li><a href="#bufio" class="table-of-contents__link toc-highlight">BufIO</a><ul><li><a href="#scanner" class="table-of-contents__link toc-highlight">Scanner</a></li><li><a href="#readslice" class="table-of-contents__link toc-highlight">ReadSlice</a></li><li><a href="#readbytes" class="table-of-contents__link toc-highlight">ReadBytes</a></li></ul></li><li><a href="#examples" class="table-of-contents__link toc-highlight">Examples</a><ul><li><a href="#read-lines" class="table-of-contents__link toc-highlight">Read Lines</a></li><li><a href="#read-bytes" class="table-of-contents__link toc-highlight">Read Bytes</a></li></ul></li></ul></div></div></div></div></main></div></div><footer class="footer"><div class="container container-fluid"><div class="row footer__links"><div class="col footer__col"><div class="footer__title">github</div><ul class="footer__items clean-list"><li class="footer__item"><a href="https://github.com/foomo" target="_blank" rel="noopener noreferrer" class="footer__link-item">https://github.com/foomo</a></li></ul></div><div class="col footer__col"><div class="footer__title">legal</div><ul class="footer__items clean-list"><li class="footer__item"><a class="footer__link-item" href="/etc/imprint">Imprint</a></li></ul></div></div><div class="footer__bottom text--center"><div class="footer__copyright">© 2023 bestbytes</div></div></div></footer></div>
|
||
<script src="/assets/js/runtime~main.2b2cf787.js"></script>
|
||
<script src="/assets/js/main.5c774faa.js"></script>
|
||
</body>
|
||
</html> |