Lodash _.prototype.chain() Method
Lodash _.prototype.chain() method of Sequence in lodash is used to create an instance of lodash wrapper accompanied by explicit method chain sequences enabled.
Syntax:
_.prototype.chain();
Parameters:
This method doesn’t accept any parameter.
Return Value:
This method returns the new lodash wrapper instance.
Example 1: In this example, we are chaining the given array and getting the tail value by the use of the lodash _.prototype.chain() method.
Javascript
// Requiring lodash library const _ = require( 'lodash' ); // Initializing authors variable let authors = [ { 'author' : 'Nidhi' , 'articles' : 750 }, { 'author' : 'Nisha' , 'articles' : 500 } ]; // Calling chain() method and creating // an explicit chaining sequence let result = _(authors).chain() .tail() .value(); // Displays output console.log(result); |
Output:
[ { author: 'Nisha', articles: 500 } ]
Example 2: In this example, we are chaining the given array and getting the head value having article as a key by the use of the lodash _.prototype.chain() method.
Javascript
// Requiring lodash library const _ = require( 'lodash' ); // Initializing authors variable let authors = [ { 'author' : 'Nidhi' , 'articles' : 750 }, { 'author' : 'Nisha' , 'articles' : 500 } ]; // Calling chain() method and creating // an explicit chaining sequence let result = _(authors).chain() .head() .pick( 'articles' ) .value(); // Displays output console.log(result); |
Output:
{ articles: 750 }
Example 3: In this example, we are chaining the given string by the use of the lodash _.prototype.chain() method.
Javascript
// Requiring lodash library const _ = require( 'lodash' ); // Calling chain() method and creating // an explicit chaining sequence let obj = _( "w3wiki" ).chain().value(); // Displays output console.log(obj[0]); console.log(obj[4]); console.log(obj[7]); console.log(obj[11]); |
Output:
G
s
r
k
Reference: https://lodash.com/docs/4.17.15#prototype-chain
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