用Javascript从一个array中删除重复的元素
下面的例子展示了你如何使用在javascript中使用forEach()和indexOf()的Array的方法从一个Array中删除重复的元素。
<!DOCTYPE html>
<html>
<head>
<title>Removing duplicate elements from an array using JavaScript</title>
</head>
<body>
<div id="debug"></div>
<script type="text/javascript">
var arr = ["two", "one", "three", "four", "three", "four", "five", "Three"];
var uniques = [];
arr.forEach(function(value) {
if (uniques.indexOf(value) == -1) {
uniques.push(value);
}
});
var str = "unique values: <code>" + uniques.join(", ") + "</code>";
document.getElementById("debug").innerHTML = str;
</script>
</body>
</html>你也可以把forEach()方法放到一个函数内部。
<div id="debug"></div>
<script type="text/javascript">
var arr = ["two", "one", "three", "four", "three", "four", "five", "Three"];
var uniques = removeDupes(arr);
var str = "unique values: <code>" + uniques.join(", ") + "</code>";
document.getElementById("debug").innerHTML = str;
function removeDupes(arr) {
var nonDupes = [];
arr.forEach(function(value) {
if (nonDupes.indexOf(value) == -1) {
nonDupes.push(value);
}
});
return nonDupes;
}
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