include: function(object) {
var found = false;
this.each(function(value) {
if (value == object) {
found = true;
throw $break;
}
});
return found;
},
var found = false;
this.each(function(value) {
if (value == object) {
found = true;
throw $break;
}
});
return found;
},
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<script language="javascript">
var arrStr=["张三","李四","王五"];
alert(arrStr.indexOf("张三")>-1);
</script>
</head><body>
</body>
</html>
function include(Arr,Str) {
return ("|||"+Arr.join("|||")+"|||").indexOf("|||"+Str+"|||")>-1);
}
alert(include(arrStr,"张三"));
alert(include(arrStr,"张四"));
if(this.length>0){
for(var i=0;i<this.length;i++){
if(this[i]==item){
return true;
}
}
}
return false;
}
Array.prototype.include=function(item){
if(this.length>0){
for(var i=0;i<this.length;i++){
if(this[i]==item){
return true; //------->>
}
}
}
return false;
}
return true //可以返回一个数值比如(i+1)表示这个元素在数组中的位置
Determines whether the specified object exists as an element in an Array object.
var a = ['red','green','blue','yellow'];
var b = Array.
很简单的算法自己搞搞