diff options
Diffstat (limited to 'files/zh-cn/web/javascript/reference/global_objects/string')
14 files changed, 95 insertions, 95 deletions
diff --git a/files/zh-cn/web/javascript/reference/global_objects/string/fixed/index.html b/files/zh-cn/web/javascript/reference/global_objects/string/fixed/index.html index f4af9c1103..03576dd5a1 100644 --- a/files/zh-cn/web/javascript/reference/global_objects/string/fixed/index.html +++ b/files/zh-cn/web/javascript/reference/global_objects/string/fixed/index.html @@ -22,7 +22,7 @@ translation_of: Web/JavaScript/Reference/Global_Objects/String/fixed <h2 id="描述">描述</h2> -<p id="fixed()_方法将一个字符串包裹在<tt><tt>标签中，比如_<tt>str<tt>."><code style="font-size: 14px; font-style: normal; font-weight: normal; line-height: 1.5;">fixed()</code><span style="font-size: 14px; font-weight: normal; line-height: 1.5;"> 方法将一个字符串包裹在<tt></tt>标签中，比如</span><span style="font-size: 14px; font-weight: normal; line-height: 1.5;">: </span><code style="font-size: 14px; font-style: normal; font-weight: normal; line-height: 1.5;">"<tt>str</tt>"</code><span style="font-size: 14px; font-weight: normal; line-height: 1.5;">.</span></p> +<p id="fixed()_方法将一个字符串包裹在<tt><tt>标签中，比如_<tt>str<tt>."><code style="font-size: 14px; font-style: normal; font-weight: normal; line-height: 1.5;">fixed()</code> 方法将一个字符串包裹在<tt></tt>标签中，比如: <code style="font-size: 14px; font-style: normal; font-weight: normal; line-height: 1.5;">"<tt>str</tt>"</code>.</p> <h2 id="举例">举例</h2> diff --git a/files/zh-cn/web/javascript/reference/global_objects/string/index.html b/files/zh-cn/web/javascript/reference/global_objects/string/index.html index d8b23c0904..5cea932350 100644 --- a/files/zh-cn/web/javascript/reference/global_objects/string/index.html +++ b/files/zh-cn/web/javascript/reference/global_objects/string/index.html @@ -245,7 +245,7 @@ console.log(String.replace(num, /5/, '2')); <p class="brush: js">移除字符串泛型的措施，参见 <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Deprecated_string_generics">Warning: String.x is deprecated; use String.prototype.x instead</a>.</p> -<p class="brush: js"><span style="background-color: #ffffff; color: #4d4e53; font-family: open sans,arial,sans-serif; font-size: 14px; line-height: 21px;">{{jsxref("Global_Objects/Array", "Generics", "#Array_generic_methods", 1)}} 在 Javascript 1.6 中同样支持{{jsxref("Global_Objects/Array", "Array")}}。</span></p> +<p class="brush: js">{{jsxref("Global_Objects/Array", "Generics", "#Array_generic_methods", 1)}} 在 Javascript 1.6 中同样支持{{jsxref("Global_Objects/Array", "Array")}}。</p> <h2 id="String_instances" name="String_instances"><code>String</code> 实例</h2> @@ -253,7 +253,7 @@ console.log(String.replace(num, /5/, '2')); <p>{{page('zh-CN/docs/Web/JavaScript/Reference/Global_Objects/String/prototype', 'Properties')}}</p> -<p><span style="line-height: 1.5;">{{page('zh-CN/docs/Web/JavaScript/Reference/Global_Objects/String/prototype', 'Methods')}}</span></p> +<p>{{page('zh-CN/docs/Web/JavaScript/Reference/Global_Objects/String/prototype', 'Methods')}}</p> <h2 id="示例">示例 </h2> diff --git a/files/zh-cn/web/javascript/reference/global_objects/string/lastindexof/index.html b/files/zh-cn/web/javascript/reference/global_objects/string/lastindexof/index.html index 3c3e51d666..e4b6dd8681 100644 --- a/files/zh-cn/web/javascript/reference/global_objects/string/lastindexof/index.html +++ b/files/zh-cn/web/javascript/reference/global_objects/string/lastindexof/index.html @@ -3,7 +3,7 @@ title: String.prototype.lastIndexOf() slug: Web/JavaScript/Reference/Global_Objects/String/lastIndexOf translation_of: Web/JavaScript/Reference/Global_Objects/String/lastIndexOf --- -<p><span class="hidden"> </span>{{JSRef}}</p> +<p> {{JSRef}}</p> <p> <strong><code>lastIndexOf()</code></strong> 方法返回调用{{jsxref("String")}} 对象的指定值最后一次出现的索引，在一个字符串中的指定位置 <code>fromIndex</code>处从后向前搜索。如果没找到这个特定值则返回-1 。</p> diff --git a/files/zh-cn/web/javascript/reference/global_objects/string/localecompare/index.html b/files/zh-cn/web/javascript/reference/global_objects/string/localecompare/index.html index 9a55c1bb88..e7948450a1 100644 --- a/files/zh-cn/web/javascript/reference/global_objects/string/localecompare/index.html +++ b/files/zh-cn/web/javascript/reference/global_objects/string/localecompare/index.html @@ -28,7 +28,7 @@ translation_of: Web/JavaScript/Reference/Global_Objects/String/localeCompare <dl> <dt><code>compareString</code></dt> <dd>用来比较的字符串</dd> - <dt><strong><code><font face="consolas, Liberation Mono, courier, monospace"><span style="background-color: #eeeeee;">locales</span></font></code></strong></dt> + <dt><strong><code><font face="consolas, Liberation Mono, courier, monospace">locales</font></code></strong></dt> <dd>可选。 用来表示一种或多种语言或区域的一个符合 <a href="https://tools.ietf.org/html/rfc5646">BCP 47</a> 标准的字符串或一个字符串数组。 <code>locales</code>参数的一般形式与解释， 详情请参考 <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl#Locale_identification_and_negotiation">Intl page</a>。 下列的 Unicode 扩展关键词是允许的：</dd> <dd><code><strong>co</strong></code></dd> <dd>为了某些地域多样的排序规则。可能的值包括： <code>"big5han"</code>, <code>"dict"</code>, <code>"direct"</code>, <code>"ducet"</code>, <code>"gb2312"</code>, <code>"phonebk"</code>, <code>"phonetic"</code>, <code>"pinyin"</code>, <code>"reformed"</code>, <code>"searchjl"</code>, <code>"stroke"</code>, <code>"trad"</code>, <code>"unihan"</code>。 <code>"standard"</code> 和<code>"search"</code> 这两个值是被忽略的; 它们被 <code>options</code> 的属性 <code>usage</code> 代替(往下看)。</dd> diff --git a/files/zh-cn/web/javascript/reference/global_objects/string/match/index.html b/files/zh-cn/web/javascript/reference/global_objects/string/match/index.html index 9922ea3291..cc979f7ffe 100644 --- a/files/zh-cn/web/javascript/reference/global_objects/string/match/index.html +++ b/files/zh-cn/web/javascript/reference/global_objects/string/match/index.html @@ -26,8 +26,8 @@ translation_of: Web/JavaScript/Reference/Global_Objects/String/match <h3 id="返回值">返回值</h3> <ul> - <li><span style="line-height: 1.572;">如果使用g标志，则将返回与完整正则表达式匹配的所有结果，但不会返回捕获组。</span></li> - <li>如果未使用g标志，则仅返回第一个完整匹配及其相关的捕获组<span style="line-height: 1.572;">（<code>Array</code>）</span>。 在这种情况下，返回的项目将具有如下所述的其他属性。</li> + <li>如果使用g标志，则将返回与完整正则表达式匹配的所有结果，但不会返回捕获组。</li> + <li>如果未使用g标志，则仅返回第一个完整匹配及其相关的捕获组（<code>Array</code>）。 在这种情况下，返回的项目将具有如下所述的其他属性。</li> </ul> <h4 id="附加属性">附加属性</h4> @@ -62,56 +62,56 @@ translation_of: Web/JavaScript/Reference/Global_Objects/String/match <p>在下例中，使用 <code>match</code> 查找 "<code>Chapter</code>" 紧跟着 1 个或多个数值字符，再紧跟着一个小数点和数值字符 0 次或多次。正则表达式包含 <code>i</code> 标志，因此大小写会被忽略。</p> -<pre class="brush: js line-numbers language-js notranslate"><code class="language-js"><span class="keyword token">var</span> str <span class="operator token">=</span> <span class="string token">'For more information, see Chapter 3.4.5.1'</span><span class="punctuation token">;</span> -<span class="keyword token">var</span> re <span class="operator token">=</span> <span class="regex token">/see (chapter \d+(\.\d)*)/i</span><span class="punctuation token">;</span> -<span class="keyword token">var</span> found <span class="operator token">=</span> str<span class="punctuation token">.</span><span class="function token">match</span><span class="punctuation token">(</span>re<span class="punctuation token">)</span><span class="punctuation token">;</span> +<pre class="brush: js line-numbers language-js notranslate"><code class="language-js">var str = 'For more information, see Chapter 3.4.5.1'; +var re = /see (chapter \d+(\.\d)*)/i; +var found = str.match(re); -console<span class="punctuation token">.</span><span class="function token">log</span><span class="punctuation token">(</span>found<span class="punctuation token">)</span><span class="punctuation token">;</span> +console.log(found); -<span class="comment token">// logs [ 'see Chapter 3.4.5.1',</span> -<span class="comment token">// 'Chapter 3.4.5.1',</span> -<span class="comment token">// '.1',</span> -<span class="comment token">// index: 22,</span> -<span class="comment token">// input: 'For more information, see Chapter 3.4.5.1' ]</span> +// logs [ 'see Chapter 3.4.5.1', +// 'Chapter 3.4.5.1', +// '.1', +// index: 22, +// input: 'For more information, see Chapter 3.4.5.1' ] -<span class="comment token">// 'see Chapter 3.4.5.1' 是整个匹配。</span> -<span class="comment token">// 'Chapter 3.4.5.1' 被'(chapter \d+(\.\d)*)'捕获。</span> -<span class="comment token">// '.1' 是被'(\.\d)'捕获的最后一个值。</span> -<span class="comment token">// 'index' 属性(22) 是整个匹配从零开始的索引。</span> -<span class="comment token">// 'input' 属性是被解析的原始字符串。</span></code></pre> +// 'see Chapter 3.4.5.1' 是整个匹配。 +// 'Chapter 3.4.5.1' 被'(chapter \d+(\.\d)*)'捕获。 +// '.1' 是被'(\.\d)'捕获的最后一个值。 +// 'index' 属性(22) 是整个匹配从零开始的索引。 +// 'input' 属性是被解析的原始字符串。</code></pre> <h3 id="Example_Using_global_and_ignore_case_flags_with_match" name="Example:_Using_global_and_ignore_case_flags_with_match">例子：<code>match</code> 使用全局（global）和忽略大小写（ignore case）标志</h3> <p>下例展示了 <code>match</code> 使用 global 和 ignore case 标志。A-E、a-e 的所有字母将会作为一个数组的元素返回。</p> -<pre class="brush: js line-numbers language-js notranslate"><code class="language-js"><span class="keyword token">var</span> str <span class="operator token">=</span> <span class="string token">'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'</span><span class="punctuation token">;</span> -<span class="keyword token">var</span> regexp <span class="operator token">=</span> <span class="regex token">/[A-E]/gi</span><span class="punctuation token">;</span> -<span class="keyword token">var</span> matches_array <span class="operator token">=</span> str<span class="punctuation token">.</span><span class="function token">match</span><span class="punctuation token">(</span>regexp<span class="punctuation token">)</span><span class="punctuation token">;</span> +<pre class="brush: js line-numbers language-js notranslate"><code class="language-js">var str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'; +var regexp = /[A-E]/gi; +var matches_array = str.match(regexp); -console<span class="punctuation token">.</span><span class="function token">log</span><span class="punctuation token">(</span>matches_array<span class="punctuation token">)</span><span class="punctuation token">;</span> -<span class="comment token">// ['A', 'B', 'C', 'D', 'E', 'a', 'b', 'c', 'd', 'e']</span></code></pre> +console.log(matches_array); +// ['A', 'B', 'C', 'D', 'E', 'a', 'b', 'c', 'd', 'e']</code></pre> <h3 id="使用match，不传参数"><code>使用match()，不传参数 </code></h3> -<pre class="brush: js line-numbers language-js notranslate"><code class="language-js"><span class="keyword token">var</span> str <span class="operator token">=</span> <span class="string token">"Nothing will come of nothing."</span><span class="punctuation token">;</span> +<pre class="brush: js line-numbers language-js notranslate"><code class="language-js">var str = "Nothing will come of nothing."; -str<span class="punctuation token">.</span><span class="function token">match</span><span class="punctuation token">(</span><span class="punctuation token">)</span><span class="punctuation token">;</span> <span class="comment token">// returns [""]</span></code></pre> +str.match(); // returns [""]</code></pre> <h3 id="一个非正则表达式对象作为参数">一个非正则表达式对象作为参数</h3> <p>当参数是一个字符串或一个数字，它会使用new RegExp(obj)来隐式转换成一个 {{jsxref("RegExp")}}。如果它是一个有正号的正数，RegExp() 方法将忽略正号。</p> -<pre class="brush: js line-numbers language-js notranslate"><code class="language-js"><span class="keyword token">var</span> str1 <span class="operator token">=</span> <span class="string token">"NaN means not a number. Infinity contains -Infinity and +Infinity in JavaScript."</span><span class="punctuation token">,</span> - str2 <span class="operator token">=</span> <span class="string token">"My grandfather is 65 years old and My grandmother is 63 years old."</span><span class="punctuation token">,</span> - str3 <span class="operator token">=</span> <span class="string token">"The contract was declared null and void."</span><span class="punctuation token">;</span> -str1<span class="punctuation token">.</span><span class="function token">match</span><span class="punctuation token">(</span><span class="string token">"number"</span><span class="punctuation token">)</span><span class="punctuation token">;</span> <span class="comment token">// "number" 是字符串。返回["number"]</span> -str1<span class="punctuation token">.</span><span class="function token">match</span><span class="punctuation token">(</span><span class="number token">NaN</span><span class="punctuation token">)</span><span class="punctuation token">;</span> <span class="comment token">// NaN的类型是number。返回["NaN"]</span> -str1<span class="punctuation token">.</span><span class="function token">match</span><span class="punctuation token">(</span><span class="number token">Infinity</span><span class="punctuation token">)</span><span class="punctuation token">;</span> <span class="comment token">// Infinity的类型是number。返回["Infinity"]</span> -str1<span class="punctuation token">.</span><span class="function token">match</span><span class="punctuation token">(</span><span class="operator token">+</span><span class="number token">Infinity</span><span class="punctuation token">)</span><span class="punctuation token">;</span> <span class="comment token">// 返回["Infinity"]</span> -str1<span class="punctuation token">.</span><span class="function token">match</span><span class="punctuation token">(</span><span class="operator token">-</span><span class="number token">Infinity</span><span class="punctuation token">)</span><span class="punctuation token">;</span> <span class="comment token">// 返回["-Infinity"]</span> -str2<span class="punctuation token">.</span><span class="function token">match</span><span class="punctuation token">(</span><span class="number token">65</span><span class="punctuation token">)</span><span class="punctuation token">;</span> <span class="comment token">// 返回["65"]</span> -str2<span class="punctuation token">.</span><span class="function token">match</span><span class="punctuation token">(</span><span class="operator token">+</span><span class="number token">65</span><span class="punctuation token">)</span><span class="punctuation token">;</span> <span class="comment token">// 有正号的number。返回["65"]</span> -str3<span class="punctuation token">.</span><span class="function token">match</span><span class="punctuation token">(</span><span class="keyword token">null</span><span class="punctuation token">)</span><span class="punctuation token">;</span> <span class="comment token">// 返回["null"]</span></code></pre> +<pre class="brush: js line-numbers language-js notranslate"><code class="language-js">var str1 = "NaN means not a number. Infinity contains -Infinity and +Infinity in JavaScript.", + str2 = "My grandfather is 65 years old and My grandmother is 63 years old.", + str3 = "The contract was declared null and void."; +str1.match("number"); // "number" 是字符串。返回["number"] +str1.match(NaN); // NaN的类型是number。返回["NaN"] +str1.match(Infinity); // Infinity的类型是number。返回["Infinity"] +str1.match(+Infinity); // 返回["Infinity"] +str1.match(-Infinity); // 返回["-Infinity"] +str2.match(65); // 返回["65"] +str2.match(+65); // 有正号的number。返回["65"] +str3.match(null); // 返回["null"]</code></pre> <h2 id="规范">规范</h2> diff --git a/files/zh-cn/web/javascript/reference/global_objects/string/normalize/index.html b/files/zh-cn/web/javascript/reference/global_objects/string/normalize/index.html index d88c6826a0..f14e1d4a36 100644 --- a/files/zh-cn/web/javascript/reference/global_objects/string/normalize/index.html +++ b/files/zh-cn/web/javascript/reference/global_objects/string/normalize/index.html @@ -54,7 +54,7 @@ translation_of: Web/JavaScript/Reference/Global_Objects/String/normalize <dl> <dt>{{jsxref("RangeError")}}</dt> - <dd>如果给 <code>form</code> 传入了上述四个字符串以外的参数，则会抛出 <span><code>RangeError</code> 异常。</span></dd> + <dd>如果给 <code>form</code> 传入了上述四个字符串以外的参数，则会抛出 <code>RangeError</code> 异常。</dd> </dl> <h2 id="描述">描述</h2> diff --git a/files/zh-cn/web/javascript/reference/global_objects/string/repeat/index.html b/files/zh-cn/web/javascript/reference/global_objects/string/repeat/index.html index ce35065f1a..b880c16b92 100644 --- a/files/zh-cn/web/javascript/reference/global_objects/string/repeat/index.html +++ b/files/zh-cn/web/javascript/reference/global_objects/string/repeat/index.html @@ -44,59 +44,59 @@ translation_of: Web/JavaScript/Reference/Global_Objects/String/repeat <p>此方法已添加到 ECMAScript 2015 规范中，并且可能尚未在所有 JavaScript 实现中可用。然而，你可以使用以下代码段对 String.prototype.repeat() 进行填充：</p> -<pre class="brush: js language-js notranslate"><code class="language-js"><span class="keyword token">if</span> <span class="punctuation token">(</span><span class="operator token">!</span>String<span class="punctuation token">.</span>prototype<span class="punctuation token">.</span>repeat<span class="punctuation token">)</span> <span class="punctuation token">{</span> - String<span class="punctuation token">.</span>prototype<span class="punctuation token">.</span>repeat <span class="operator token">=</span> <span class="keyword token">function</span><span class="punctuation token">(</span>count<span class="punctuation token">)</span> <span class="punctuation token">{</span> - <span class="string token">'use strict'</span><span class="punctuation token">;</span> - <span class="keyword token">if</span> <span class="punctuation token">(</span><span class="keyword token">this</span> <span class="operator token">==</span> <span class="keyword token">null</span><span class="punctuation token">)</span> <span class="punctuation token">{</span> - <span class="keyword token">throw</span> <span class="keyword token">new</span> <span class="class-name token">TypeError</span><span class="punctuation token">(</span><span class="string token">'can\'t convert '</span> <span class="operator token">+</span> <span class="keyword token">this</span> <span class="operator token">+</span> <span class="string token">' to object'</span><span class="punctuation token">)</span><span class="punctuation token">;</span> - <span class="punctuation token">}</span> - <span class="keyword token">var</span> str <span class="operator token">=</span> <span class="string token">''</span> <span class="operator token">+</span> <span class="keyword token">this</span><span class="punctuation token">;</span> - count <span class="operator token">=</span> <span class="operator token">+</span>count<span class="punctuation token">;</span> - <span class="keyword token">if</span> <span class="punctuation token">(</span>count <span class="operator token">!</span><span class="operator token">=</span> count<span class="punctuation token">)</span> <span class="punctuation token">{</span> - count <span class="operator token">=</span> <span class="number token">0</span><span class="punctuation token">;</span> - <span class="punctuation token">}</span> - <span class="keyword token">if</span> <span class="punctuation token">(</span>count <span class="operator token"><</span> <span class="number token">0</span><span class="punctuation token">)</span> <span class="punctuation token">{</span> - <span class="keyword token">throw</span> <span class="keyword token">new</span> <span class="class-name token">RangeError</span><span class="punctuation token">(</span><span class="string token">'repeat count must be non-negative'</span><span class="punctuation token">)</span><span class="punctuation token">;</span> - <span class="punctuation token">}</span> - <span class="keyword token">if</span> <span class="punctuation token">(</span>count <span class="operator token">==</span> <span class="number token">Infinity</span><span class="punctuation token">)</span> <span class="punctuation token">{</span> - <span class="keyword token">throw</span> <span class="keyword token">new</span> <span class="class-name token">RangeError</span><span class="punctuation token">(</span><span class="string token">'repeat count must be less than infinity'</span><span class="punctuation token">)</span><span class="punctuation token">;</span> - <span class="punctuation token">}</span> - count <span class="operator token">=</span> Math<span class="punctuation token">.</span><span class="function token">floor<span class="punctuation token">(</span></span>count<span class="punctuation token">)</span><span class="punctuation token">;</span> - <span class="keyword token">if</span> <span class="punctuation token">(</span>str<span class="punctuation token">.</span>length <span class="operator token">==</span> <span class="number token">0</span> <span class="operator token">||</span> count <span class="operator token">==</span> <span class="number token">0</span><span class="punctuation token">)</span> <span class="punctuation token">{</span> - <span class="keyword token">return</span> <span class="string token">''</span><span class="punctuation token">;</span> - <span class="punctuation token">}</span> - <span class="comment token"> // 确保 count 是一个 31 位的整数。这样我们就可以使用如下优化的算法。 - // 当前（2014年8月），绝大多数浏览器都不能支持 1 << 28 长的字符串，所以：</span><span class="comment token"> -</span> <span class="keyword token">if</span> <span class="punctuation token">(</span>str<span class="punctuation token">.</span>length <span class="operator token">*</span> count <span class="operator token">>=</span> <span class="number token">1</span> <span class="operator token"><</span><span class="operator token"><</span> <span class="number token">28</span><span class="punctuation token">)</span> <span class="punctuation token">{</span> - <span class="keyword token">throw</span> <span class="keyword token">new</span> <span class="class-name token">RangeError</span><span class="punctuation token">(</span><span class="string token">'repeat count must not overflow maximum string size'</span><span class="punctuation token">)</span><span class="punctuation token">;</span> - <span class="punctuation token">}</span> - <span class="keyword token">var</span> rpt <span class="operator token">=</span> <span class="string token">''</span><span class="punctuation token">;</span> - <span class="keyword token">for</span> <span class="punctuation token">(</span><span class="punctuation token">;</span><span class="punctuation token">;</span><span class="punctuation token">)</span> <span class="punctuation token">{</span> - <span class="keyword token">if</span> <span class="punctuation token">(</span><span class="punctuation token">(</span>count <span class="operator token">&</span> <span class="number token">1</span><span class="punctuation token">)</span> <span class="operator token">==</span> <span class="number token">1</span><span class="punctuation token">)</span> <span class="punctuation token">{</span> - rpt <span class="operator token">+</span><span class="operator token">=</span> str<span class="punctuation token">;</span> - <span class="punctuation token">}</span> - count <span class="operator token">></span><span class="operator token">></span><span class="operator token">>=</span> <span class="number token">1</span><span class="punctuation token">;</span> - <span class="keyword token">if</span> <span class="punctuation token">(</span>count <span class="operator token">==</span> <span class="number token">0</span><span class="punctuation token">)</span> <span class="punctuation token">{</span> - <span class="keyword token">break</span><span class="punctuation token">;</span> - <span class="punctuation token">}</span> - str <span class="operator token">+</span><span class="operator token">=</span> str<span class="punctuation token">;</span> - <span class="punctuation token">}</span> - <span class="keyword token">return</span> rpt<span class="punctuation token">;</span> - <span class="punctuation token">}</span> -<span class="punctuation token">}</span></code></pre> +<pre class="brush: js language-js notranslate"><code class="language-js">if (!String.prototype.repeat) { + String.prototype.repeat = function(count) { + 'use strict'; + if (this == null) { + throw new TypeError('can\'t convert ' + this + ' to object'); + } + var str = '' + this; + count = +count; + if (count != count) { + count = 0; + } + if (count < 0) { + throw new RangeError('repeat count must be non-negative'); + } + if (count == Infinity) { + throw new RangeError('repeat count must be less than infinity'); + } + count = Math.floor(count); + if (str.length == 0 || count == 0) { + return ''; + } + // 确保 count 是一个 31 位的整数。这样我们就可以使用如下优化的算法。 + // 当前（2014年8月），绝大多数浏览器都不能支持 1 << 28 长的字符串，所以： + if (str.length * count >= 1 << 28) { + throw new RangeError('repeat count must not overflow maximum string size'); + } + var rpt = ''; + for (;;) { + if ((count & 1) == 1) { + rpt += str; + } + count >>>= 1; + if (count == 0) { + break; + } + str += str; + } + return rpt; + } +}</code></pre> <h2 id="Examples" name="Examples">示例</h2> -<pre class="brush:js notranslate"><span class="difflineplus">"abc".repeat(-1) // </span>RangeError: repeat count must be positive and less than inifinity -<span class="difflineplus">"abc".repeat(0) // ""</span> -<span class="difflineplus">"abc".repeat(1) // "abc"</span> -<span class="difflineplus">"abc".repeat(2) // "</span>abcabc<span class="difflineplus">" -</span>"abc".repeat(3.5)<span class="difflineplus"> // "abcabcabc" 参数count将会被自动转换成整数. -</span><span class="difflineplus">"abc".repeat(1/0) //</span> RangeError: repeat count must be positive and less than inifinity +<pre class="brush:js notranslate">"abc".repeat(-1) // RangeError: repeat count must be positive and less than inifinity +"abc".repeat(0) // "" +"abc".repeat(1) // "abc" +"abc".repeat(2) // "abcabc" +"abc".repeat(3.5) // "abcabcabc" 参数count将会被自动转换成整数. +"abc".repeat(1/0) // RangeError: repeat count must be positive and less than inifinity -<span class="difflineplus">({toString : () => "abc", repeat : String.prototype.repeat}</span><span class="difflineplus">).repeat(2) -</span><span class="difflineplus">//"</span>abcabc<span class="difflineplus">",repeat是一个通用方法</span>,也就是它的调用者可以不是一个字符串对象.</pre> +({toString : () => "abc", repeat : String.prototype.repeat}).repeat(2) +//"abcabc",repeat是一个通用方法,也就是它的调用者可以不是一个字符串对象.</pre> <h2 id="规范">规范</h2> diff --git a/files/zh-cn/web/javascript/reference/global_objects/string/replace/index.html b/files/zh-cn/web/javascript/reference/global_objects/string/replace/index.html index 45421c8b54..49f27efe4b 100644 --- a/files/zh-cn/web/javascript/reference/global_objects/string/replace/index.html +++ b/files/zh-cn/web/javascript/reference/global_objects/string/replace/index.html @@ -193,7 +193,7 @@ console.log(newstr); } </pre> -<p>运行 <code>styleHyphenFormat('borderTop')</code><code>，</code><span>将</span><span>返回 'border-top'。</span></p> +<p>运行 <code>styleHyphenFormat('borderTop')</code><code>，</code>将返回 'border-top'。</p> <p>因为我们想在最终的替换中进一步转变匹配结果，所以我们必须使用一个函数。这迫使我们在使用{{jsxref("String.prototype.toLowerCase()", "toLowerCase()")}}方法前进行评估。如果我们尝试不用一个函数进行匹配，那么使用{{jsxref("String.prototype.toLowerCase()", "toLowerCase()")}} 方法将不会有效。</p> diff --git a/files/zh-cn/web/javascript/reference/global_objects/string/replaceall/index.html b/files/zh-cn/web/javascript/reference/global_objects/string/replaceall/index.html index 69c92e87dc..cbd76d71b7 100644 --- a/files/zh-cn/web/javascript/reference/global_objects/string/replaceall/index.html +++ b/files/zh-cn/web/javascript/reference/global_objects/string/replaceall/index.html @@ -9,7 +9,7 @@ translation_of: Web/JavaScript/Reference/Global_Objects/String/replaceAll --- <div>{{JSRef}}</div> -<p><span class="seoSummary"><strong><code>replaceAll()</code></strong> 方法返回一个新字符串，新字符串所有满足 <code>pattern</code> 的部分都已被<code>replacement</code> 替换。</span><span class="seoSummary"><code>pattern</code></span>可以是一个字符串或一个 {{jsxref("RegExp")}}， <code>replacement</code>可以是一个字符串或一个在每次匹配被调用的函数。</p> +<p><strong><code>replaceAll()</code></strong> 方法返回一个新字符串，新字符串所有满足 <code>pattern</code> 的部分都已被<code>replacement</code> 替换。<code>pattern</code>可以是一个字符串或一个 {{jsxref("RegExp")}}， <code>replacement</code>可以是一个字符串或一个在每次匹配被调用的函数。</p> <p>原始字符串保持不变。</p> diff --git a/files/zh-cn/web/javascript/reference/global_objects/string/slice/index.html b/files/zh-cn/web/javascript/reference/global_objects/string/slice/index.html index df8f398983..35f5dd5736 100644 --- a/files/zh-cn/web/javascript/reference/global_objects/string/slice/index.html +++ b/files/zh-cn/web/javascript/reference/global_objects/string/slice/index.html @@ -29,7 +29,7 @@ translation_of: Web/JavaScript/Reference/Global_Objects/String/slice <dt><code>beginIndex</code></dt> <dd>从该索引（以 0 为基数）处开始提取原字符串中的字符。如果值为负数，会被当做 <code>strLength + beginIndex</code> 看待，这里的<code>strLength</code> 是字符串的长度（例如， 如果 <code>beginIndex</code> 是 -3 则看作是：<code>strLength - 3</code>）</dd> <dt><code>endIndex</code></dt> - <dd>可选。在该索引（以 0 为基数）处结束提取字符串。如果省略该参数，<code style="font-style: normal;">slice()</code> 会一直提取到字符串末尾。<span style="line-height: 1.5;">如果该参数为负数，则被看作是 strLength + endIndex，这里的 strLength 就是字符串的长度(例如，如果 endIndex 是 -3，则是, strLength - 3)。</span></dd> + <dd>可选。在该索引（以 0 为基数）处结束提取字符串。如果省略该参数，<code style="font-style: normal;">slice()</code> 会一直提取到字符串末尾。如果该参数为负数，则被看作是 strLength + endIndex，这里的 strLength 就是字符串的长度(例如，如果 endIndex 是 -3，则是, strLength - 3)。</dd> </dl> <h3 id="返回值">返回值</h3> diff --git a/files/zh-cn/web/javascript/reference/global_objects/string/startswith/index.html b/files/zh-cn/web/javascript/reference/global_objects/string/startswith/index.html index 747878e5b9..7cbd48ba7b 100644 --- a/files/zh-cn/web/javascript/reference/global_objects/string/startswith/index.html +++ b/files/zh-cn/web/javascript/reference/global_objects/string/startswith/index.html @@ -13,7 +13,7 @@ translation_of: Web/JavaScript/Reference/Global_Objects/String/startsWith --- <div>{{JSRef}}</div> -<p><span class="seoSummary"><code><strong>startsWith()</strong></code> 方法用来判断当前字符串是否以另外一个给定的子字符串开头，并根据判断结果返回 <code>true</code> 或 <code>false</code>。</span></p> +<p><code><strong>startsWith()</strong></code> 方法用来判断当前字符串是否以另外一个给定的子字符串开头，并根据判断结果返回 <code>true</code> 或 <code>false</code>。</p> <div>{{EmbedInteractiveExample("pages/js/string-startswith.html")}}</div> diff --git a/files/zh-cn/web/javascript/reference/global_objects/string/substr/index.html b/files/zh-cn/web/javascript/reference/global_objects/string/substr/index.html index 8faa458218..782816ee91 100644 --- a/files/zh-cn/web/javascript/reference/global_objects/string/substr/index.html +++ b/files/zh-cn/web/javascript/reference/global_objects/string/substr/index.html @@ -19,7 +19,7 @@ translation_of: Web/JavaScript/Reference/Global_Objects/String/substr <dl> <dt><code>start</code></dt> - <dd>开始提取字符的位置。如果为负值，则被看作 <code style="font-style: normal; line-height: 1.5;">strLength + </code><code style="font-style: normal; line-height: 1.5;">start，其中</code><span style="line-height: 1.5;"> </span><code style="font-style: normal; line-height: 1.5;">strLength</code><span style="line-height: 1.5;"> 为字符串的长度（例如，如果 <code>start</code> 为 <code>-3，则被看作</code> <code>strLength + (-3)）。</code></span></dd> + <dd>开始提取字符的位置。如果为负值，则被看作 <code style="font-style: normal; line-height: 1.5;">strLength + </code><code style="font-style: normal; line-height: 1.5;">start，其中</code> <code style="font-style: normal; line-height: 1.5;">strLength</code> 为字符串的长度（例如，如果 <code>start</code> 为 <code>-3，则被看作</code> <code>strLength + (-3)）。</code></dd> </dl> <dl> diff --git a/files/zh-cn/web/javascript/reference/global_objects/string/substring/index.html b/files/zh-cn/web/javascript/reference/global_objects/string/substring/index.html index 9a2d97f935..e2b061d1a3 100644 --- a/files/zh-cn/web/javascript/reference/global_objects/string/substring/index.html +++ b/files/zh-cn/web/javascript/reference/global_objects/string/substring/index.html @@ -105,7 +105,7 @@ replaceString("World", "Web", "Brave New World");</pre> return fullS.split(oldS).join(newS); }</pre> -<p><span style="line-height: 1.5;">上面的代码只是子字符串操作的一个例子。如果你需要替换子字符串，更多时候会用到 </span><span style="line-height: 1.5em;">{{jsxref("String.prototype.replace()")}}。</span></p> +<p>上面的代码只是子字符串操作的一个例子。如果你需要替换子字符串，更多时候会用到 {{jsxref("String.prototype.replace()")}}。</p> <h2 id="规范">规范</h2> diff --git a/files/zh-cn/web/javascript/reference/global_objects/string/tolowercase/index.html b/files/zh-cn/web/javascript/reference/global_objects/string/tolowercase/index.html index e08a47bb55..b0ecb92a51 100644 --- a/files/zh-cn/web/javascript/reference/global_objects/string/tolowercase/index.html +++ b/files/zh-cn/web/javascript/reference/global_objects/string/tolowercase/index.html @@ -40,7 +40,7 @@ translation_of: Web/JavaScript/Reference/Global_Objects/String/toLowerCase <div class="line-number" style="margin-top: 1em; position: absolute; left: 0px; right: 0px; line-height: inherit; top: 0px; background: 0px 0px;"></div> -<p><font face="x-locale-heading-primary, zillaslab, Palatino, Palatino Linotype, x-locale-heading-secondary, serif"><span style="font-size: 37.33327865600586px;"><strong>说明</strong></span></font></p> +<p><font face="x-locale-heading-primary, zillaslab, Palatino, Palatino Linotype, x-locale-heading-secondary, serif"><strong>说明</strong></font></p> |