To extract element or item from array in JavaScript; Through this tutorial, i am going to show you how to how to extract elements or items from array in javascript with the help of array slice()
method.
Extract Elements From Array in JavaScript
Using javaScript slice() method; you can easily extracts a part of an array from a given array and returns a new array.
The following syntax represents the slice()
method:
slice(begin, end);
Note that, the js array slice()
method takes two optional parameters.
Here,
- The
begin
is a position where to start the extraction. - The
end
is a position where to end the extraction.
Note that, about js array slice()
method:
- If
begin
is undefined,slice
begins from the index0
. - If
end
is omitted,slice
extracts through the end of the sequence (arr.length
).
Example 2 – Extract portion of an array from array javascript
The following example shows how to copy the portion of an array without changing the original array using the slice()
method.
See the following example:\
var lang = ['php','java','c','c#','.net', 'python']; var res = lang.slice(0,4); console.log(res); // ["php", "java", "c", "c#"]
The res
array contains the first 4 elements of the lang
array. The original array lang
remains entire.
Conclusion
In this tutorial, you have learned JavaScript array slice()
method and how to use it.