Whats filter in javascript | javascript filter explained

ARRAY FILTR

The filter () method creates an array filled with all array elements that pass a test (provided as a function).

NOTE

filter () does not execute the function for array elements without values.

But how it works?

Let's Understand with an example

Suppose you have given an array of ages

var ages = [32,33,16,40]

TASK IS

You have to print an array from the given array which have age greater then 18

var ages = [32,33,16,40]

SOLUTION OF TASK

So you can eaithe use for loop and print value under a given condition using if

else or........

You can use filter () method

LETS HOW IT WORK

filter () will return you can copy of array under a given condition var new-ages

=ages.filter(age=>age>=;18);

EXPLAIN

filter () takes function as argument and it will return you value at given index or you can say it will return value and index pair Data will be return under some condition given inside that argument

Syntax

array.filter((value,index)> console.log(value,index))

Functional argument loops through the array and return data in key value pair.

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Conclusion

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Whats filter in javascript | javascript filter explained