- it技术
- js数组简介(二)
数组API数组遍历
<!DOCTYPE html
>
<html
>
<head
>
<meta charset
="UTF-8">
<title
>数组介绍
</title
>
<script type
="text/javascript">
var arr
= ["走起","张三","李四","王五","赵六"];
var itemArr
= arr
.slice(1,3);
console
.log(itemArr
);
console
.log(arr
);
arr
.splice(1,1);
console
.log(arr
)
arr
.splice(1,0,"adaada")
console
.log(arr
)
arr
.splice(1,1,"测试update")
console
.log(arr
)
var one
= [1,2];
var two
= [3,4];
console
.log(one
.concat(two
));
console
.log(arr
.join("---"));
console
.log("数组排序"+arr
.sort())
arr
.sort(function (a
,b
){
return a
.length
-b
.length
;
});
console
.log(arr
.reverse())
for (var i
=0;i
<arr
.length
;i
++) {
console
.log(arr
[i
])
}
var testArr
= [4,3,1];
arr
.forEach(function(value
,index
,testArr
){
console
.log(value
+","+index
)
console
.log(testArr
);
})
</script
>
</head
>
<body
>
</body
>
</html
>
