Assign values to byte array

xuanbao · · 1389 次点击    
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<p>I want to set an array of bytes. I&#39;m writing this:</p> <pre><code>var FooArr [size]byte = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } </code></pre> <p>Goland tells me &#34;expression or string literal expected&#34;, what am i doing wrong?</p> <p>Thanks!</p> <hr/>**评论:**<br/><br/>klauspost: <pre><p>You can either do this:</p> <pre><code>var foo [16]byte = [...]byte { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } </code></pre> <p>or this (nicer)</p> <pre><code>var foo = [...]byte { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } </code></pre></pre>8lall0: <pre><p>Thanks!</p></pre>nevyn: <pre><p>Note that the second version doesn&#39;t tell the programmer (reader) what the size of the array is. In this case you can solve that by having 4 groups of 4 values, but in general it can be better to add the extra &#34;[16]byte&#34; even if you think it looks uglier.</p></pre>nevyn: <pre><p>Note that <a href="https://tour.golang.org/basics/12" rel="nofollow">zero values</a> are special in golang, so both:</p> <pre><code>var foo1 [16]byte = [16]byte{0} var foo2 [16]byte </code></pre> <p>...will also work.</p></pre>kl0nos: <pre><p>FooArr := []byte{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }</p></pre>

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