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/1.4/docs/html/api/lang/map.html

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    91. 

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    93. 

  93.         <li><a href="../button/index.html">button</a></li>
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    168. 

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    169. 

  169. 				
    170. 

  170.   <div class="section" id="map">
    171. 

  171. <h1>map<a class="headerlink" href="#map" title="Permalink to this headline"></a></h1>
    172. 

  172. <div class="section" id="methods">
    173. 

  173. <h2>Methods<a class="headerlink" href="#methods" title="Permalink to this headline"></a></h2>
    174. 

  174. <dl class="function">
    175. 

  175. <dt id="seed.KISSY.map">
    176. 

  176. <tt class="descclassname">KISSY.</tt><tt class="descname">map</tt><big>(</big><big>)</big><a class="headerlink" href="#seed.KISSY.map" title="Permalink to this definition"></a></dt>
    177. 

  177. <dd><div class="line-block">
    178. 

  178. <div class="line">Array <strong>KISSY.map</strong> (arr,fn[,context])</div>
    179. 

  179. <div class="line">创建一个新数组, 数组结果是在对每个原数组元素调用指定函数的返回值.</div>
    180. 

  180. </div>
    181. 

  181. <table class="docutils field-list" frame="void" rules="none">
    182. 

  182. <col class="field-name" />
    183. 

  183. <col class="field-body" />
    184. 

  184. <tbody valign="top">
    185. 

  185. <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
    186. 

  186. <li><strong>arr</strong> (<em>Array</em>) &#8211; 需要遍历的数组.</li>
    187. 

  187. <li><strong>fn</strong> (<em>function</em>) &#8211; 能够根据原数组当前元素返回新数组元素的函数.</li>
    188. 

  188. <li><strong>context</strong> (<em>object</em>) &#8211; 执行 <tt class="docutils literal"><span class="pre">fn</span></tt> 时的 <tt class="docutils literal"><span class="pre">this</span></tt> 值.</li>
    189. 

  189. </ul>
    190. 

  190. </td>
    191. 

  191. </tr>
    192. 

  192. <tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">返回符合根据指定函数调用得到新数组</p>
    193. 

  193. </td>
    194. 

  194. </tr>
    195. 

  195. <tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">Array</p>
    196. 

  196. </td>
    197. 

  197. </tr>
    198. 

  198. </tbody>
    199. 

  199. </table>
    200. 

  200. <div class="admonition note">
    201. 

  201. <p class="first admonition-title">Note</p>
    202. 

  202. <p class="last">原数组保持不变</p>
    203. 

  203. </div>
    204. 

  204. <p>例如:</p>
    205. 

  205. <div class="highlight-javascript"><div class="highlight"><pre><span class="kd">function</span> <span class="nx">makePseudoPlural</span><span class="p">(</span><span class="nx">single</span><span class="p">)</span> <span class="p">{</span>
    206. 

  206.     <span class="k">return</span> <span class="nx">single</span><span class="p">.</span><span class="nx">replace</span><span class="p">(</span><span class="sr">/o/g</span><span class="p">,</span> <span class="s2">&quot;e&quot;</span><span class="p">);</span>
    207. 

  207. <span class="p">}</span>
    208. 

  208. 

  209. <span class="kd">var</span> <span class="nx">singles</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;foot&quot;</span><span class="p">,</span> <span class="s2">&quot;goose&quot;</span><span class="p">,</span> <span class="s2">&quot;moose&quot;</span><span class="p">];</span>
    210. 

  210. <span class="kd">var</span> <span class="nx">plurals</span> <span class="o">=</span> <span class="nx">S</span><span class="p">.</span><span class="nx">map</span><span class="p">(</span><span class="nx">singles</span><span class="p">,</span> <span class="nx">makePseudoPlural</span><span class="p">);</span>  <span class="c1">// =&gt; [&quot;feet&quot;, &quot;geese&quot;, &quot;meese&quot;]</span>
    211. 

  211. 

  212. <span class="kd">var</span> <span class="nx">a</span> <span class="o">=</span> <span class="nx">S</span><span class="p">.</span><span class="nx">map</span><span class="p">(</span><span class="s2">&quot;Hello World&quot;</span><span class="p">,</span><span class="kd">function</span><span class="p">(</span><span class="nx">x</span><span class="p">)</span> <span class="p">{</span>
    213. 

  213.     <span class="k">return</span> <span class="nx">x</span><span class="p">.</span><span class="nx">charCodeAt</span><span class="p">(</span><span class="mi">0</span><span class="p">);</span>
    214. 

  214. <span class="p">});</span> <span class="c1">// =&gt; [72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100]</span>
    215. 

  215. </pre></div>
    216. 

  216. </div>
    217. 

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