JavaScript移除數組內重復元素的方法

2019-11-20 12:54:27

字體：大中小

來源：轉載

供稿：網友

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

這段JS代碼用于從數組中移除重復的元素，比如： ['apple', 'orange', 'peach', 'apple', 'strawberry', 'orange'] 去重后返回：s ['apple', 'orange', 'peach', 'strawberry']

復制代碼代碼如下:

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

復制代碼代碼如下:

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>