diff options
Diffstat (limited to 'files/zh-tw/web/javascript/reference/global_objects/array/length')
| -rw-r--r-- | files/zh-tw/web/javascript/reference/global_objects/array/length/index.html | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/files/zh-tw/web/javascript/reference/global_objects/array/length/index.html b/files/zh-tw/web/javascript/reference/global_objects/array/length/index.html index 453564d528..1b6497b07a 100644 --- a/files/zh-tw/web/javascript/reference/global_objects/array/length/index.html +++ b/files/zh-tw/web/javascript/reference/global_objects/array/length/index.html @@ -7,7 +7,7 @@ translation_of: Web/JavaScript/Reference/Global_Objects/Array/length <p><code><strong>length</strong></code> 為<code>Array物件的屬性</code> ，可供設定或回傳該陣列實體中包含的元素個數。其值必為一大於零、32位元、且恆大於該陣列最大索引數的正整數。</p> -<pre class="brush: js notranslate">var items = ['shoes', 'shirts', 'socks', 'sweaters']; +<pre class="brush: js">var items = ['shoes', 'shirts', 'socks', 'sweaters']; items.length; // returns 4</pre> @@ -16,7 +16,7 @@ items.length; <p><code>length</code> 屬性的值必為一正整數，其值必介於 0 ～ 2<sup>32</sup> (不包含)之間.</p> -<pre class="brush: js notranslate">var namelistA = new Array(4294967296); //2<sup>32</sup><sup> = </sup>4294967296 +<pre class="brush: js">var namelistA = new Array(4294967296); //2<sup>32</sup><sup> = </sup>4294967296 var namelistC = new Array(-100) //負數 console.log(namelistA.length); //RangeError: Invalid array length @@ -32,7 +32,7 @@ console.log(namelistB.length); <p>你可以透過改變 <code>length</code> 屬性來改變陣列的長度。當你透過 <code>length</code> 屬性來增加陣列的長度時，陣列中實際的元素也會隨之增加。舉例來說，當你將 array.length 由 2 增加為3，則改動後該陣列即擁有3個元素，該新增的元素則會是一個不可迭代(non-iterable)的空槽(empty slot)。</p> -<pre class="notranslate">const arr = [1, 2]; +<pre>const arr = [1, 2]; console.log(arr); // [ 1, 2 ] @@ -62,7 +62,7 @@ arr.forEach(element => console.log(element)); // 空元素無法被迭代 <p>以下範例中, 陣列 <code>numbers</code> 透過 <code>length</code> 屬性進行迭代操作，並將其內容值加倍。</p> -<pre class="brush: js notranslate">var numbers = [1, 2, 3, 4, 5]; +<pre class="brush: js">var numbers = [1, 2, 3, 4, 5]; var length = numbers.length; for (var i = 0; i < length; i++) { numbers[i] *= 2; @@ -74,7 +74,7 @@ for (var i = 0; i < length; i++) { <p>以下範例中, 陣列 <code>numbers</code> 的長度若大於 3，則將其長度縮減至 3。</p> -<pre class="brush: js notranslate">var numbers = [1, 2, 3, 4, 5]; +<pre class="brush: js">var numbers = [1, 2, 3, 4, 5]; if (numbers.length > 3) { numbers.length = 3; |