268 lines
7.4 KiB
HTML
268 lines
7.4 KiB
HTML
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<title>fs cheatsheet</title>
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<body>
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<div class='all'>
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<div class='site-header'>
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This is <a href="."><em>Devhints.io cheatsheets</em></a> — a collection of cheatsheets I've written.
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"description": "The one-page guide to fs: usage, examples, links, snippets, and more."
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"@id": "https://devhints.io/nodejs-fs",
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"name": "fs"
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<div class='post-list -single -cheatsheet'>
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<div class='post-item'>
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<div class='post-headline -cheatsheet'>
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<p class='prelude'><span></span></p>
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<h1><span>fs</span></h1>
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<div class='pubbox'>
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<div class='HeadlinePub' role='complementary'>
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<script async src='https://pubsrv.devhints.io/carbon.js?serve=CE7IK5QM&placement=devhintsio&cd=pubsrv.devhints.io/s' id="_carbonads_js"></script>
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<span class='placeholder -one'></span>
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<span class='placeholder -two'></span>
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<span class='placeholder -three'></span>
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<span class='placeholder -four'></span>
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</div>
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</div>
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</div>
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<div class='post-content -cheatsheet'>
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<h3 id="reading">Reading</h3>
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<pre><code>fs.readFile('file.txt', function(err, data) { .. });
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fs.readFile('file.txt', {encoding: 'utf-8'}, function(err, data) { .. });
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</code></pre>
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<h3 id="writing">Writing</h3>
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<pre><code>fs.writeFile('output.txt', function(err) { .. });
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fs.appendFile('output.txt', function(err) { .. });
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</code></pre>
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<h3 id="watch">Watch</h3>
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<pre><code>fs.watch('dir OR file.txt', { persistent: true }, function(event, file) {
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event; /* rename | change */
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});
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</code></pre>
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<h3 id="getting-info">Getting info</h3>
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<pre><code>fs.exists('file.txt', function(exists /*bool*/) { ... });
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fs.stat('file.txt', function(stats) {
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stats.isFile();
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stats.isDirectory();
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stats.isSymbolicLink();
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});
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</code></pre>
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<h3 id="file-operations">File operations</h3>
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<pre><code>fs.rename('old.txt', 'new.txt', function(){});
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fs.chown('file.txt', uid, gid, function(){});
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fs.symlink('src', 'dest', function(){});
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fs.unlink('path', function(){});
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fs.rmdir('path', function(){});
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fs.readdir('path', function(err, files) { .. }); /* `files` = array of names */
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</code></pre>
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<h3 id="path">Path</h3>
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<pre><code>fs.realpath('/etc/passwd', function(err, path) { /* "/private/etc/passwd" */ });
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</code></pre>
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<h3 id="sync">Sync</h3>
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<pre><code>data = fs.readFileSync('input.txt');
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fs.writeFileSync('output.txt', data);
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fs.appendFileSync('output.txt', data);
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fs.existsSync('file.txt');
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</code></pre>
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<h3 id="references">References</h3>
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<ul>
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<li>http://nodejs.org/api/fs.html</li>
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</ul>
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</div>
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</ul>
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</div>
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</div>
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<div class="about-the-site">
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<div class="container">
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<p class='blurb'>
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<strong><a href=".">Devhints.io cheatsheets</a></strong> is a collection of cheatsheets I've written over the years.
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Suggestions and corrections? <a href='https://github.com/rstacruz/cheatsheets/issues/907'>Send them in</a>.
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<i class='fleuron'></i>
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I'm <a href="http://ricostacruz.com">Rico Sta. Cruz</a>.
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Check out my <a href="http://ricostacruz.com/til">Today I learned blog</a> for more.
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</p>
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<p class='back'>
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<a class='big-button -back -slim' href='.#toc'></a>
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</p>
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<p>
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