Underscore.js _.dictionary() Method

The _.dictionary() method returns a function that will attempt to look up a field that it is given.

Syntax:

funct = _.dictionary( object );

Parameters:

• object: This method takes the object from which the field is to be searched.

Return Value: This method returns a function that will attempt to look up a field that is given.

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');

var ob = { gfg : "GeeksforGeeks" }
var gfgg = _.dictionary( ob );

console.log(gfgg("gfg"));

Output:

GeeksforGeeks

Example 2: If this function does not find any field then it will return undefined.

Javascript

// Defining underscore contrib variable
var _ = require('underscore-contrib');

var ob = { gfg : "GeeksforGeeks" }
var gfgg = _.dictionary( ob );

console.log(gfgg("geek"));

Output:

undefined