correct the wrong "half-closed loop"

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numbbbbb
2014-06-14 00:41:48 +08:00
parent 2bd4a3addb
commit b3ef454499
42 changed files with 82 additions and 82 deletions

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@ -643,7 +643,7 @@ for _ in 1...power {
println(&quot;\(base) to the power of \(power) is \(answer)&quot;)
// 输出 &quot;3 to the power of 10 is 59049&quot;
</code></pre>
<p>这个例子计算 base 这个数的 power 次幂(本例中,是<code>3</code><code>10</code>次幂),从<code>1</code><code>3</code><code>0</code>次幂)开始做<code>3</code>的乘法, 进行<code>10</code>次,使用<code>1</code><code>10</code>闭区间循环。这个计算并不需要知道每一次循环中计数器具体的值,只需要执行了正确的循环次数即可。下划线符号<code>_</code>(替代循环中的变量)能够忽略具体的值,并且不提供循环遍历时对值的访问。</p>
<p>这个例子计算 base 这个数的 power 次幂(本例中,是<code>3</code><code>10</code>次幂),从<code>1</code><code>3</code><code>0</code>次幂)开始做<code>3</code>的乘法, 进行<code>10</code>次,使用<code>1</code><code>10</code>的闭区间循环。这个计算并不需要知道每一次循环中计数器具体的值,只需要执行了正确的循环次数即可。下划线符号<code>_</code>(替代循环中的变量)能够忽略具体的值,并且不提供循环遍历时对值的访问。</p>
<p>使用<code>for-in</code>遍历一个数组所有元素:</p>
<pre><code class="lang-swift">let names = [&quot;Anna&quot;, &quot;Alex&quot;, &quot;Brian&quot;, &quot;Jack&quot;]
for name in names {

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<h1 id="swift-">Swift 教程</h1>
<p>本章介绍了 Swift 的各种特性及其使用方法,是全书的核心部分。</p>