The _.functionalize() method takes a function (one which uses this) and pushes this into the argument list. The returned function uses its first argument as the receiver/context of the original function, and the rest of the arguments are used as the original’s entire argument list.
Syntax:
_.functionalize( function )
Parameters: This method takes a function that uses this.
Return Value: This method returns a function.
Note: This will not work in normal JavaScript because it requires the underscore.js contrib library to be installed Underscore.js contrib library can be installed using npm install underscore-contrib –save.
Example 1:
Javascript
// Defining underscore contrib variable var _ = require('underscore-contrib'); function get(g) { return this[g]; } var geekFunc = _.functionalize(get); var neveropen = { neveropen: "Computer Science Portal for Geeks"}; console.log(geekFunc(neveropen, "neveropen")) |
Output:
Computer Science Portal for Geeks
Example 2:
Javascript
// Defining underscore contrib variable var _ = require('underscore-contrib'); function get(g) { return this[g]; } var geekFunc = _.functionalize(get); var neveropen = { neveropen: 1000000 }; console.log(geekFunc(neveropen, "neveropen")) |
Output:
1000000
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