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string range
R=rsc DELTA=22 (19 added, 0 deleted, 3 changed) OCL=34463 CL=34463
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@ -489,10 +489,10 @@ and <code>while</code> and there is no <code>do-while</code>.
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There are three forms, only one of which has semicolons:
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</p>
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<pre>
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// Like a C for:
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// Like a C for
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for init; condition; post { }
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// Like a C while:
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// Like a C while
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for condition { }
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// Like a C for(;;)
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@ -521,10 +521,29 @@ for key, value := range m { // key is unused; could call it '_'
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}
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</pre>
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<p>
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For strings, the <code>range</code> does more of the work for you, breaking out individual
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characters by parsing the UTF-8 (erroneous encodings consume one byte and produce the
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replacement rune U+FFFD). The loop
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</p>
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<pre>
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for pos, char := range "日本語" {
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fmt.Printf("character %c starts at byte position %d\n", char, pos)
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}
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</pre>
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<p>
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prints
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</p>
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<pre>
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character 日 starts at byte position 0
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character 本 starts at byte position 3
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character 語 starts at byte position 6
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</pre>
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<p>
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Finally, since Go has no comma operator and <code>++</code> and <code>--</code>
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are statements not expressions, if you want to run multiple variables in a <code>for</code>
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you can use parallel assignment:
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you should use parallel assignment:
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</p>
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<pre>
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// Reverse a
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