JavaScript移除數組內重複元素的方法

本文實例講述了JavaScript移除數組內重複元素的方法。分享給大家供大家參考。具體分析如下：

這段JS代碼用於從數組中移除重複的元素，比如： ['apple', 'orange', 'peach', 'apple', 'strawberry', 'orange'] 去重後返回：s ['apple', 'orange', 'peach', 'strawberry']

複製代碼代碼如下:function removeDuplicates(arr) {

var temp = {};

for (var i = 0; i < arr.length; i++)

temp[arr[i]] = true;

var r = [];

for (var k in temp)

r.push(k);

return r;

}

//Usage

var fruits = ['apple', 'orange', 'peach', 'apple', 'strawberry', 'orange'];

var uniquefruits = removeDuplicates(fruits);

//print uniquefruits ['apple', 'orange', 'peach', 'strawberry'];

下面的代碼可以在瀏覽器中驗證

複製代碼代碼如下:Remove duplicate elements from an array. <br>

<pre> var fruits = ['apple', 'orange', 'peach', 'apple', 'strawberry', 'orange'];

</pre>

Note 'orange' is duplicate in fruits array. Click to remove duplicate elements from fruits array:<br>

<button onclick="check()">Remove Duplicate</button>

<script>

function removeDuplicates(arr) {

var temp = {};

for (var i = 0; i < arr.length; i++)

temp[arr[i]] = true;

var r = [];

for (var k in temp)

r.push(k);

return r;

}

function check() {

var fruits = ['apple', 'orange', 'peach', 'apple', 'strawberry', 'orange'];

var uniquefruits = removeDuplicates(fruits);

alert(uniquefruits);

}

</script>

希望本文所述對大家的javascript程序設計有所幫助。