The slice () method of the forgotten JavaScript

Source: Internet
Author: User
Tags javascript array

The slice method of a JavaScript array object separates a child array from the array, and functions like the substring method of the string object. Today we're going to go into the less common slice () method of JavaScript in detail.

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

Well, I admit I forgot it!

This time I'm looking back at it.

Grammar

Arrayobject.slice (Start,end)

Array. Slice (start, end)

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1 2 3 4 5 6 7 8 9 10 <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 2nd to 4th

Instance code:

Example one:

The code is as follows:

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1 2 var a= "abcdefgmnlxyz"; Console.log (A.slice (2,3));

Intercepts the string between the position "2" and the position "3", but the character d corresponding to the position "3" is not within the intercept return. Output result: C.

Example two:

The code is as follows:

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1 2 var a= "abcdefgmnlxyz"; Console.log (A.slice (2));

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

The above describes the forgotten JavaScript slice () method, I hope you can enjoy.

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