var arr1=["a","b","c"]; var arr2=["a","f","g","c"]; var arr3=[]; for(var s in arr1){ for(var x in arr2){ if(arr1[s]==arr2[x]){ arr3.push(arr1[s]); } } } alert("相同的元素有"+arr3)
== 肯定不行，要用 ===，不信你 L@_@Kvar arr1=["1","2","3"]; var arr2=[1,"f","g",3]; var arr3=[]; for(var s in arr1){ for(var x in arr2){ if(arr1[s]==arr2[x]){ arr3.push(arr1[s]); } } } alert("相同的元素有"+arr3); // 1, 3
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title> new document </title>
<meta name="generator" content="editplus" />
<meta name="author" content="" />
<meta name="keywords" content="" />
<meta name="description" content="" />
</head> <body>
<script type="text/javascript">
<!--
Array.ExistsSameValues = function(a1, a2) {
var exists = false;
if(a1 instanceof Array && a2 instanceof Array)
{
for (var i=0,iLen=a1.length; i<iLen; i++)
{
for (var j=0,jLen=a2.length; j<jLen; j++)
{
if (a1[i]===a2[j])
{
return true;
}
}
}
}
return exists;
};var a1 = [1, 2, 5, 8];
var a2 = [3, 1, 9, 5];alert(Array.ExistsSameValues(a1, a2));
//-->
</script>
</body>
</html>
var arr1=["a","b","c"];
var arr2=["a","f","g","c"];
var arr3=[];
for(var s in arr1){
for(var x in arr2){
if(arr1[s]==arr2[x]){
arr3.push(arr1[s]);
}
}
} alert("相同的元素有"+arr3)
var arr2=[1,"f","g",3];
var arr3=[];
for(var s in arr1){
for(var x in arr2){
if(arr1[s]==arr2[x]){
arr3.push(arr1[s]);
}
}
}
alert("相同的元素有"+arr3); // 1, 3