The forgotten slice() method of javascript_javascript tips

The slice() method returns selected elements from an existing array.

Okay, I admit I forgot about it!

I’m reviewing it this time

Grammar

arrayObject.slice(start,end)
Array.slice(start, end)

<script type="text/javascript">
var arr = new Array(6)
arr[0] = "George"
arr[1] = "John"
arr[2] = "Thomas"
arr[3] = "James"
arr[4] = "Adrew"
arr[5] = "Martin"
document.write(arr.slice(2,4) + "<br />")
</script>

Thomas,James

Select array index 2 to 4

Example code:

Example 1:
The code is as follows:

var a="abcdefgmnlxyz";
console.log(a.slice(2,3));

Intercept the string between position "2" and position "3", but the character d corresponding to position "3" is not included in the interception return. Output result: c.

Example 2:
The code is as follows:

var a="abcdefgmnlxyz";
console.log(a.slice(2));

If the second parameter is omitted, all characters from position "2" to the end of the string will be intercepted. Output result: cdefgmnlxyz.

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