https://www.bencode.io/tags/golang/ Recent content in Golang on Benny Simmonds Hugo -- 0.149.1 en-us Thu, 19 Aug 2021 21:59:35 +0000 https://www.bencode.io/posts/go/ Sat, 05 Oct 2019 19:02:44 +0000 https://www.bencode.io/posts/go/ <ul> <li><a href="#gopath">GOPATH</a></li> <li><a href="#run-build-and-install">Run, build and install</a></li> <li><a href="#dependencies">Dependencies</a></li> <li><a href="#formatting">Formatting</a></li> <li><a href="#documentation">Documentation</a></li> <li><a href="#structuring-a-source-tree">Structuring a source tree</a></li> <li><a href="#the-lang">The lang</a> <ul> <li><a href="#variables">Variables</a></li> <li><a href="#control-structures-if-switch-and-for">Control structures (if, switch and for)</a> <ul> <li><a href="#if">if</a></li> <li><a href="#switch">switch</a></li> <li><a href="#for">for</a></li> </ul> </li> <li><a href="#io">I/O</a> <ul> <li><a href="#fmt">fmt</a></li> <li><a href="#cli">CLI</a> <ul> <li><a href="#args">Args</a></li> <li><a href="#flags">Flags</a></li> </ul> </li> </ul> </li> </ul> </li> <li><a href="#basic-data-types">Basic Data Types</a> <ul> <li><a href="#type-conversion">Type conversion</a></li> <li><a href="#strings">Strings</a> <ul> <li><a href="#unicode">Unicode</a></li> <li><a href="#string-literals">String literals</a></li> </ul> </li> <li><a href="#numbers">Numbers</a> <ul> <li><a href="#integers">Integers</a></li> <li><a href="#bitwise-operations">Bitwise operations</a></li> <li><a href="#floating-point">Floating point</a></li> </ul> </li> <li><a href="#constants">Constants</a></li> <li><a href="#pointers">Pointers</a></li> </ul> </li> <li><a href="#functions">Functions</a> <ul> <li><a href="#grouped-parameters-types">Grouped parameters types</a></li> <li><a href="#variadic-functions">Variadic functions</a></li> <li><a href="#multiple-return-values">Multiple return values</a></li> <li><a href="#named-return-values">Named return values</a></li> <li><a href="#recursion">Recursion</a></li> <li><a href="#deferred-functional-calls">Deferred functional calls</a></li> <li><a href="#functions-as-values">Functions as values</a></li> <li><a href="#function-literals-anonymous-functions">Function literals (anonymous functions)</a></li> <li><a href="#passing-functions-to-functions">Passing functions to functions</a></li> <li><a href="#closures">Closures</a></li> </ul> </li> <li><a href="#error-handling">Error Handling</a> <ul> <li><a href="#error-handling-strategies">Error handling strategies</a> <ul> <li><a href="#propagate-to-caller">Propagate to caller</a></li> <li><a href="#retry">Retry</a></li> <li><a href="#log-and-continue">Log and continue</a></li> <li><a href="#log-and-exit">Log and exit</a></li> </ul> </li> <li><a href="#pkgerrors">pkg/errors</a></li> <li><a href="#panic-and-recover">Panic and Recover</a></li> </ul> </li> <li><a href="#packages-and-libraries">Packages and Libraries</a> <ul> <li><a href="#package-aliases">Package aliases</a></li> <li><a href="#imported-unused-packages-for-side-effects">Imported unused packages for side effects</a></li> <li><a href="#inspecting-a-package-api">Inspecting a package API</a></li> </ul> </li> <li><a href="#advanced-data-types">Advanced Data Types</a> <ul> <li><a href="#arrays">Arrays</a></li> <li><a href="#slices">Slices</a> <ul> <li><a href="#extending-slices">Extending slices</a></li> <li><a href="#creating-a-slice-with-make">Creating a slice with make</a></li> <li><a href="#byte-slices">Byte slices</a></li> </ul> </li> <li><a href="#maps">Maps</a> <ul> <li><a href="#creating-maps">Creating maps</a></li> <li><a href="#crud-create-retrieve-update-delete-operations-with-maps">CRUD (create retrieve update delete) operations with maps</a></li> </ul> </li> <li><a href="#named-types-user-defined-types">Named types (user defined types)</a> <ul> <li><a href="#function-named-type">Function named type</a></li> </ul> </li> <li><a href="#type-aliases">Type aliases</a></li> <li><a href="#struct">Struct</a></li> <li><a href="#struct-embedding">Struct embedding</a></li> <li><a href="#field-tags">Field tags</a></li> <li><a href="#struct-methods">Struct methods</a></li> <li><a href="#receiver-method-sets">Receiver Method Sets</a></li> <li><a href="#interfaces">Interfaces</a> <ul> <li><a href="#interface-internals">Interface internals</a></li> <li><a href="#warning---dont-assign-nil-variables-to-interfaces">WARNING - dont assign nil variables to interfaces</a></li> <li><a href="#type-assertion">Type assertion</a></li> <li><a href="#type-switches">Type switches</a></li> </ul> </li> </ul> </li> <li><a href="#cool-cool-cool">Cool cool cool</a> <ul> <li><a href="#stdlib">stdlib</a></li> <li><a href="#tools">Tools</a></li> <li><a href="#make">Make</a></li> <li><a href="#vim-setup">Vim setup</a></li> </ul> </li> <li><a href="#libraries">Libraries</a> <ul> <li><a href="#data">Data</a></li> <li><a href="#middleware">Middleware</a></li> <li><a href="#web">Web</a></li> </ul> </li> </ul> <p><a href="https://golang.org/doc/effective_go.html">Effective Go</a> is a howto on writing idiomatic Go.</p> https://www.bencode.io/posts/2019-04-28-go-web/ Sun, 28 Apr 2019 17:13:10 +0000 https://www.bencode.io/posts/2019-04-28-go-web/ <p>A quick tour of doing web with golang, all living off the land with Go&rsquo;s built-in <a href="https://golang.org/pkg/">standard library</a>.</p> <h1 id="packages">Packages</h1> <p>Working example, where the web server and templating code in source file <code>$GOPATH/src/github.com/bm4cs/gotime/web/server.go</code>. It does lots of things, but exports function <code>StartServer</code> (upper case first character means publically exported).</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-go" data-lang="go"><span class="line"><span class="cl"><span class="kn">package</span><span class="w"> </span><span class="nx">web</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="kd">func</span><span class="w"> </span><span class="nf">StartServer</span><span class="p">()</span><span class="w"> </span><span class="p">{</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"> </span><span class="o">...</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="p">}</span><span class="w"> </span></span></span></code></pre></div><p>The main func in <code>$GOPATH/src/github.com/bm4cs/gotime/myapp/app.go</code> can import the web package:</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-go" data-lang="go"><span class="line"><span class="cl"><span class="kn">import</span><span class="w"> </span><span class="p">(</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"> </span><span class="s">&#34;github.com/bm4cs/gotime/web&#34;</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="p">)</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="kd">func</span><span class="w"> </span><span class="nf">main</span><span class="p">()</span><span class="w"> </span><span class="p">{</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"> </span><span class="nx">web</span><span class="p">.</span><span class="nf">StartServer</span><span class="p">()</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="p">}</span><span class="w"> </span></span></span></code></pre></div><h1 id="handling-requests">Handling Requests</h1> <p>The <a href="https://golang.org/pkg/net/http/">http</a> package from the standard library, provides a ton a out of the box functionality. <a href="https://golang.org/doc/articles/wiki/">Writing Web Applications</a> on golang.org is a very pragmatic guide.</p>