<p>The functions in this folder are to be use for keeping cached references to the built-in prototypes, so that people can't inadvertently break the library by making mistakes in userland.</p>

<p>See https://github.com/sinonjs/sinon/pull/1523</p>

<h3>Without cached references</h3>

<pre><code>
// in userland, the library user needs to replace the filter method on
// Array.prototype
var array = [1, 2, 3];
sinon.replace(array, "filter", sinon.fake.returns(2));

// in a sinon module, the library author needs to use the filter method
var someArray = ["a", "b", 42, "c"];
var answer = filter(someArray, function (v) {
return v === 42;
});

console.log(answer);
// => 2
</code></pre>

<h3>With cached references</h3>

<pre><code>
// in userland, the library user needs to replace the filter method on
// Array.prototype
var array = [1, 2, 3];
sinon.replace(array, "filter", sinon.fake.returns(2));

// in a sinon module, the library author needs to use the filter method
// get a reference to the original Array.prototype.filter
var filter = require("@sinonjs/commons").prototypes.array.filter;
var someArray = ["a", "b", 42, "c"];
var answer = filter(someArray, function (v) {
return v === 42;
});

console.log(answer);
// => 42
</code></pre>

<hr>

<p>本文由模极社发布</p>

<h4> 内容概览</h4>

<table>
<tr><td>分类</td><td>要点</td><td>建议/说明</td></tr>
<tr><td>核心概念</td><td>Prototypes</td><td>详见正文</td></tr>
<tr><td>操作步骤</td><td>Prototypes</td><td>详见正文</td></tr>
<tr><td>注意事项</td><td>Prototypes</td><td>详见正文</td></tr>
<tr><td>适用场景</td><td>Prototypes</td><td>详见正文</td></tr>
<tr><td>常见问题</td><td>Prototypes</td><td>详见正文</td></tr>
</table>

<hr>
<h4> 你可能还感兴趣</h4>
<ul>
<li><a href="/t/3478/3478">VDMA 德国机械制造商联合会工模具分会</a></li>
<li><a href="/t/4375/4375">jest-docblock</a></li>
<li><a href="/t/4507/4507">@vue/compiler-vapor</a></li>
</ul>

<hr>
<p><strong>相关推荐：</strong></p>
<ul>
<li><a href="https://www.mj7.cn/t/4836-4836">北京模具产业 — 科技研发驱动型模具基地</a></li>
<li><a href="https://www.mj7.cn/t/4835-4835">上海模具产业 — 高端精密模具研发中心</a></li>
<li><a href="https://www.mj7.cn/t/4834-4834">产业集群与模具产业发展的关系</a></li>
</ul>

<hr>
<p>这个参数你们一般设多少？评论区说说。</p>