filterlodash

Filter Lodash is a JavaScript utility library function used to create a new filtered array based on a provided function. It is part of the Lodash library, a JavaScript library that provides a lot of functional programming helpers in a convenient and functional way.

Filter Lodash, also known as _filter, is a higher-order function that takes two arguments: the collection to manipulate and the function that defines the filter criteria. The library does not mutate the original array, instead returns a new array with only the elements that pass the filter.

The function works by iterating over the provided collection and applying the filter function to each element. Those elements that result in a value that is considered "truthy" (i.e., passes the test), are included in the new filtered array.

A common example of how to use Filter Lodash is:

```javascript

const data = [1, 2, 3, 4, 5];

const result = _.filter(data, function(n) {

return n % 2 === 0;

});

console.log(result);

//Output: [2, 4]

```

In this example, Filter Lodash is used to filter an array for even numbers only. The resulting array contains only elements for which the filter function returns true.

Filter Lodash is often used in combination with other Lodash utilities like map and reduce to create data transformations that further complex manipulation of arrays in a more boilerplated fashion.

Filter Lodash is available in Lodash library and can be installed via NPM package manager.