Array型別並沒有提供去重複的方法,如果要把陣列的重複元素幹掉,那得自己想辦法。所以以下就給大家分享關於高效率去掉js數組中重複項的方法,有需要的朋友可以參考一下
這是一個高效率去除重複的方法:
function hovercUnique(arr) { var result = [], hash = {}; for (var i = 0, elem; (elem = arr[i]) != null; i++) { if (!hash[elem]) { result.push(elem); hash[elem] = true; } } return result; //http://hovertree.com }
使用範例效果:
#http://hovertree.com/texiao/jsstudy/4/
#http ://hovertree.com/code/dev/lg17a37a.htm
使用方法:
<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title>高效率去掉js数组中重复项的特效 - 何问起</title><base target="_blank" /> <meta charset="utf-8" /> <style>a{color:deeppink;}</style> </head> <body> <p><a href="http://hovertree.com/">首页</a> <a href="http://hovertree.com/texiao/">特效</a> <a href="http://hovertree.com/h/bjaf/ovjl4eus.htm">原文</a> </p> <p> <script> var h_hewenqiArray = new Array(); h_hewenqiArray[0] = "hovertree"; h_hewenqiArray[1] = "easysector"; h_hewenqiArray[2] = "hovertree"; h_hewenqiArray[3] = "keleyi"; h_hewenqiArray[4] = "keleyi"; h_hewenqiArray[5] = "何问起"; h_hewenqiArray[6] = "hovertree"; h_hewenqiArray[7] = "hoverclock"; h_hewenqiArray[8] = "yestop"; h_hewenqiArray[9] = 163; h_hewenqiArray[10] = "何问起"; h_hewenqiArray[11] = 163; h_hewenqiArray[12] = "hoverclock"; h_hewenqiArray[13] = "何问起"; var h_arrayLength = h_hewenqiArray.length; document.write("原始数组元素个数:"+h_arrayLength + "<br />"); for (var i = 0; i < h_arrayLength; i++) { document.write(h_hewenqiArray[i]+"<br />"); } function hovercUnique(arr) { var result = [], hash = {}; for (var i = 0, elem; (elem = arr[i]) != null; i++) { if (!hash[elem]) { result.push(elem); hash[elem] = true; } } return result; //http://hovertree.com } var h_hewenqiResult = hovercUnique(h_hewenqiArray); var h_resultLength = h_hewenqiResult.length; document.write("<br />去重复后数组元素个数:" + h_resultLength + "<br />"); for (var i = 0; i < h_resultLength; i++) { document.write(h_hewenqiResult[i] + "<br />"); } </script> </p> <p style="border:solid 1px silver"><p>何问起 hovertree.com</p></p> </body> </html>
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