Underscore.js _.dictionary() Method

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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 : "zambiatek" } 
var gfgg = _.dictionary( ob ); 
  
console.log(gfgg("gfg"));

Output:

zambiatek

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 : "zambiatek" } 
var gfgg = _.dictionary( ob ); 
  
console.log(gfgg("geek"));