javascript当中排序比较器用法
javascript当中排序比较器用法
例 1.5（排序比较器) <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8"/> for teach. <script type="text/javascript"> function sortNumberqixy(a, b) { /* 马克-to-win returned value type: Array object JavaScript syntax: - myArray.sort() - myArray.sort(aComparator) Argument list: aComparator A function object that will compare two items and returns a flag indicating their order in the sort collating sequence. Sort the elements in an array. You must make sure the comparator returns one of the following three values: Negative integer(qixy: not a boolean.) - signifies that the first argument is less than the second.(qixy the whole final result is that small number is in front.) Zero - Signifies that both arguments are the same. Positive integer - Signifies that the first argument is larger than the second. qixy: int=parseInt(String) */ if (parseInt(a) < parseInt(b)) return -5; if (parseInt(a) > parseInt(b)) return 4; else return 0; /* the following is a simple method */ //return a - b } var arr = new Array(3) arr[0] = "9" arr[1] = "6" arr[2] = "6" arr[3] = "26" arr[4] = "10001" arr[5] = "2" document.write(arr + "<br />"); /* note that if we don't give the comparator, sort will use the default way to sort. then it will sort according to String,then its order is 10001,2,26,6,6,9 */ document.write("排序之后：" + arr.sort()); document.write("排序之后：" + arr.sort(sortNumberqixy)); </script> </head> <body> </body> </html>
更多请见：https://blog.csdn.net/qq_43650923/article/details/102138369
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