return a=b;與return 0;有什么區(qū)別？
<script type="text/javascript">
? ?function sortNum(a,b) {
? ? ?return 0;//輸出結(jié)果為：80,16,50,6,100,1 ?
? ? ?return a=b;//輸出結(jié)果為:1,100,6,50,16,80
? ?}
var myarr = new Array("80","16","50","6","100","1");
document.write(myarr.sort(sortNum));
</script>
2017-10-02
從結(jié)果上看:return 0;數(shù)組排序不變;
return a=b;數(shù)組反轉(zhuǎn)