JavaScript移除数组内重复元素的方法_javascript技巧

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'];

Remove duplicate elements from an array.

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

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

Remove Duplicate