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。
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<!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。
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<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; }</script>?