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author | Florian Merz <me@fiji-flo.de> | 2021-02-11 12:56:40 +0100 |
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committer | Florian Merz <me@fiji-flo.de> | 2021-02-11 12:56:40 +0100 |
commit | 310fd066e91f454b990372ffa30e803cc8120975 (patch) | |
tree | d5d900deb656a5da18e0b60d00f0db73f3a2e88e /files/zh-cn/web/javascript/reference/operators/按位与/index.html | |
parent | 8260a606c143e6b55a467edf017a56bdcd6cba7e (diff) | |
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diff --git a/files/zh-cn/web/javascript/reference/operators/按位与/index.html b/files/zh-cn/web/javascript/reference/operators/按位与/index.html deleted file mode 100644 index 20eece2691..0000000000 --- a/files/zh-cn/web/javascript/reference/operators/按位与/index.html +++ /dev/null @@ -1,106 +0,0 @@ ---- -title: 按位与 (&) -slug: Web/JavaScript/Reference/Operators/按位与 -translation_of: Web/JavaScript/Reference/Operators/Bitwise_AND ---- -<div>{{jsSidebar("Operators")}}</div> - -<p>按位与运算符 (<code>&</code>) 在每个位上返回 <code>1</code> ,这两个操作数对应的位都是 <code>1</code>.</p> - -<div>{{EmbedInteractiveExample("pages/js/expressions-bitwise-and.html")}}</div> - -<div class="hidden">The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone <a href="https://github.com/mdn/interactive-examples">https://github.com/mdn/interactive-examples</a> and send us a pull request.</div> - -<h2 id="语法">语法</h2> - -<pre class="syntaxbox notranslate"><code><var>a</var> & <var>b</var></code> -</pre> - -<h2 id="描述">描述</h2> - -<p>操作数被转换为32位整数,并由一系列位(0和1)表示。 超过32位的数字将丢弃其最高有效位。 例如,以下大于32位的整数将被转换为32位整数:</p> - -<pre class="brush: js notranslate">Before: 11100110111110100000000000000110000000000001 -After: 10100000000000000110000000000001</pre> - -<p>第一个操作数中的每个位都与第二个操作数中的相应位配对:第一位到第一位,第二位到第二位,依此类推。</p> - -<p>将运算符应用于每对位,然后按位构造结果。</p> - -<p>与运算的真值表:</p> - -<table class="standard-table"> - <thead> - <tr> - <th class="header" scope="col">a</th> - <th class="header" scope="col">b</th> - <th class="header" scope="col">a AND b</th> - </tr> - </thead> - <tbody> - <tr> - <td>0</td> - <td>0</td> - <td>0</td> - </tr> - <tr> - <td>0</td> - <td>1</td> - <td>0</td> - </tr> - <tr> - <td>1</td> - <td>0</td> - <td>0</td> - </tr> - <tr> - <td>1</td> - <td>1</td> - <td>1</td> - </tr> - </tbody> -</table> - -<pre class="brush: js notranslate">. 9 (base 10) = 00000000000000000000000000001001 (base 2) - 14 (base 10) = 00000000000000000000000000001110 (base 2) - -------------------------------- -14 & 9 (base 10) = 00000000000000000000000000001000 (base 2) = 8 (base 10) -</pre> - -<p>将任何数字<code>x</code>与<code>0</code>进行按位与运算将得出<code>0</code>。</p> - -<h2 id="示例">示例</h2> - -<h3 id="使用按位与">使用按位与</h3> - -<pre class="brush: js notranslate">// 5: 00000000000000000000000000000101 -// 2: 00000000000000000000000000000010 -5 & 2; // 0</pre> - -<h2 id="规范说明">规范说明</h2> - -<table class="standard-table"> - <thead> - <tr> - <th scope="col">Specification</th> - </tr> - </thead> - <tbody> - <tr> - <td>{{SpecName('ESDraft', '#prod-BitwiseANDExpression', 'Bitwise AND expression')}}</td> - </tr> - </tbody> -</table> - -<h2 id="浏览器兼容性">浏览器兼容性</h2> - - - -<p>{{Compat("javascript.operators.bitwise_and")}}</p> - -<h2 id="参阅">参阅</h2> - -<ul> - <li><a href="/en-US/docs/Web/JavaScript/Guide/Expressions_and_Operators#Bitwise">Bitwise operators in the JS guide</a></li> - <li><a href="/en-US/docs/Web/JavaScript/Reference/Operators/Bitwise_AND_assignment">Bitwise AND assignment operator</a></li> -</ul> |