Added example for fallthrough in switch
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subsr97
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43825687bb
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3eb46d3131
@ -60,4 +60,21 @@ func main() {
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whatAmI(true)
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whatAmI(1)
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whatAmI("hey")
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// Every case includes a break by default.
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// You can use the keyword 'fallthrough' to override this
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// behaviour. In this example, we print 'FooBar' if num
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// is even and 'Bar' if num is odd.
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evenOdd := func(num int) {
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switch {
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case num%2 == 0:
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fmt.Printf("Foo")
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fallthrough
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case num%2 == 1:
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fmt.Printf("Bar")
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}
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fmt.Printf("\n")
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}
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evenOdd(2)
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evenOdd(5)
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}
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@ -1,2 +1,2 @@
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2486fc553301cdeac9a26f3d0b3aed4143d9f4f0
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ZcDzdx3nYQn
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e501748f7d89d213a594dfcc4ce48e4067fd93ea
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k7kFpwIJaL5
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@ -5,3 +5,5 @@ It's after noon
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I'm a bool
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I'm an int
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Don't know type string
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FooBar
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Bar
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35
public/switch
generated
35
public/switch
generated
@ -42,7 +42,7 @@ branches.</p>
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</td>
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<td class="code leading">
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<a href="http://play.golang.org/p/ZcDzdx3nYQn"><img title="Run code" src="play.png" class="run" /></a><img title="Copy code" src="clipboard.png" class="copy" />
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<a href="http://play.golang.org/p/k7kFpwIJaL5"><img title="Run code" src="play.png" class="run" /></a><img title="Copy code" src="clipboard.png" class="copy" />
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<div class="highlight"><pre><span class="kn">package</span> <span class="nx">main</span>
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</pre></div>
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@ -147,7 +147,7 @@ value. In this example, the variable <code>t</code> will have the
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type corresponding to its clause.</p>
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</td>
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<td class="code">
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<td class="code leading">
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<div class="highlight"><pre> <span class="nx">whatAmI</span> <span class="o">:=</span> <span class="kd">func</span><span class="p">(</span><span class="nx">i</span> <span class="kd">interface</span><span class="p">{})</span> <span class="p">{</span>
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<span class="k">switch</span> <span class="nx">t</span> <span class="o">:=</span> <span class="nx">i</span><span class="p">.(</span><span class="kd">type</span><span class="p">)</span> <span class="p">{</span>
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@ -162,6 +162,33 @@ type corresponding to its clause.</p>
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<span class="nx">whatAmI</span><span class="p">(</span><span class="kc">true</span><span class="p">)</span>
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<span class="nx">whatAmI</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
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<span class="nx">whatAmI</span><span class="p">(</span><span class="s">"hey"</span><span class="p">)</span>
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</pre></div>
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</td>
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</tr>
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<tr>
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<td class="docs">
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<p>Every case includes a break by default.
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You can use the keyword ‘fallthrough’ to override this
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behaviour. In this example, we print ‘FooBar’ if num
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is even and ‘Bar’ if num is odd.</p>
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</td>
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<td class="code">
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<div class="highlight"><pre> <span class="nx">evenOdd</span> <span class="o">:=</span> <span class="kd">func</span><span class="p">(</span><span class="nx">num</span> <span class="kt">int</span><span class="p">)</span> <span class="p">{</span>
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<span class="k">switch</span> <span class="p">{</span>
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<span class="k">case</span> <span class="nx">num</span><span class="o">%</span><span class="mi">2</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span>
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<span class="nx">fmt</span><span class="p">.</span><span class="nx">Printf</span><span class="p">(</span><span class="s">"Foo"</span><span class="p">)</span>
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<span class="k">fallthrough</span>
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<span class="k">case</span> <span class="nx">num</span><span class="o">%</span><span class="mi">2</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span>
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<span class="nx">fmt</span><span class="p">.</span><span class="nx">Printf</span><span class="p">(</span><span class="s">"Bar"</span><span class="p">)</span>
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<span class="p">}</span>
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<span class="nx">fmt</span><span class="p">.</span><span class="nx">Printf</span><span class="p">(</span><span class="s">"\n"</span><span class="p">)</span>
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<span class="p">}</span>
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<span class="nx">evenOdd</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span>
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<span class="nx">evenOdd</span><span class="p">(</span><span class="mi">5</span><span class="p">)</span>
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<span class="p">}</span>
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</pre></div>
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@ -185,6 +212,8 @@ type corresponding to its clause.</p>
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<span class="go">I'm a bool</span>
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<span class="go">I'm an int</span>
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<span class="go">Don't know type string</span>
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<span class="go">FooBar</span>
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<span class="go">Bar</span>
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</pre></div>
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</td>
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@ -203,7 +232,7 @@ type corresponding to its clause.</p>
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</div>
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<script>
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var codeLines = [];
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codeLines.push('');codeLines.push('package main\u000A');codeLines.push('import (\u000A \"fmt\"\u000A \"time\"\u000A)\u000A');codeLines.push('func main() {\u000A');codeLines.push(' i := 2\u000A fmt.Print(\"Write \", i, \" as \")\u000A switch i {\u000A case 1:\u000A fmt.Println(\"one\")\u000A case 2:\u000A fmt.Println(\"two\")\u000A case 3:\u000A fmt.Println(\"three\")\u000A }\u000A');codeLines.push(' switch time.Now().Weekday() {\u000A case time.Saturday, time.Sunday:\u000A fmt.Println(\"It\'s the weekend\")\u000A default:\u000A fmt.Println(\"It\'s a weekday\")\u000A }\u000A');codeLines.push(' t := time.Now()\u000A switch {\u000A case t.Hour() \x3C 12:\u000A fmt.Println(\"It\'s before noon\")\u000A default:\u000A fmt.Println(\"It\'s after noon\")\u000A }\u000A');codeLines.push(' whatAmI := func(i interface{}) {\u000A switch t := i.(type) {\u000A case bool:\u000A fmt.Println(\"I\'m a bool\")\u000A case int:\u000A fmt.Println(\"I\'m an int\")\u000A default:\u000A fmt.Printf(\"Don\'t know type %T\\n\", t)\u000A }\u000A }\u000A whatAmI(true)\u000A whatAmI(1)\u000A whatAmI(\"hey\")\u000A}\u000A');codeLines.push('');
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codeLines.push('');codeLines.push('package main\u000A');codeLines.push('import (\u000A \"fmt\"\u000A \"time\"\u000A)\u000A');codeLines.push('func main() {\u000A');codeLines.push(' i := 2\u000A fmt.Print(\"Write \", i, \" as \")\u000A switch i {\u000A case 1:\u000A fmt.Println(\"one\")\u000A case 2:\u000A fmt.Println(\"two\")\u000A case 3:\u000A fmt.Println(\"three\")\u000A }\u000A');codeLines.push(' switch time.Now().Weekday() {\u000A case time.Saturday, time.Sunday:\u000A fmt.Println(\"It\'s the weekend\")\u000A default:\u000A fmt.Println(\"It\'s a weekday\")\u000A }\u000A');codeLines.push(' t := time.Now()\u000A switch {\u000A case t.Hour() \x3C 12:\u000A fmt.Println(\"It\'s before noon\")\u000A default:\u000A fmt.Println(\"It\'s after noon\")\u000A }\u000A');codeLines.push(' whatAmI := func(i interface{}) {\u000A switch t := i.(type) {\u000A case bool:\u000A fmt.Println(\"I\'m a bool\")\u000A case int:\u000A fmt.Println(\"I\'m an int\")\u000A default:\u000A fmt.Printf(\"Don\'t know type %T\\n\", t)\u000A }\u000A }\u000A whatAmI(true)\u000A whatAmI(1)\u000A whatAmI(\"hey\")\u000A');codeLines.push(' evenOdd := func(num int) {\u000A switch {\u000A case num%2 == 0:\u000A fmt.Printf(\"Foo\")\u000A fallthrough\u000A case num%2 == 1:\u000A fmt.Printf(\"Bar\")\u000A }\u000A fmt.Printf(\"\\n\")\u000A }\u000A evenOdd(2)\u000A evenOdd(5)\u000A}\u000A');codeLines.push('');
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</script>
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<script src="site.js" async></script>
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</body>
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