Lodash is a JavaScript library that works on the top of underscore.js. Lodash helps in working with arrays, strings, objects, numbers, etc.
The _.prototype.next() method of Sequence in lodash is used to find the next value on a wrapped object which follows the iterator protocol.
Syntax:
_.prototype.next()
Parameters: This method doesn’t accept any parameter.
Return Value: This method returns the value of next iterator.
Example 1:
Javascript
// Requiring lodash library const _ = require('lodash'); // Initializing wrapped value var wrapper = _([5, 6]); // Calling prototype.next() method let res1 = wrapper.next(); let res2 = wrapper.next(); // Displays output console.log(res1); console.log(res2); |
Output:
{ done: false, value: 5 }
{ done: false, value: 6 }
Example 2:
Javascript
// Requiring lodash library const _ = require('lodash'); // Initializing wrapped value var wrapper = _([]); // Calling prototype.next() method let result = wrapper.next(); // Displays output console.log(result); |
Output:
{ done: true, value: undefined }
Here, the output is ‘undefined’ as there is no value to print.
Example 3:
Javascript
// Requiring lodash library const _ = require('lodash'); // Calling prototype.next() method let result1 = _({'f':5}).next(); let result2 = _({'g':(1/0)}).next(); // Displays output console.log(result1); console.log(result2); |
Output:
{ done: false, value: 5 }
{ done: false, value: Infinity }
Here, only the defined value is returned to the output.
Reference: https://lodash.com/docs/4.17.15#prototype-next
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