Lodash _.prototype.next() Method
Lodash _.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();
Return Value:
This method returns the value of the next iterator.
Example 1: In this example, it returns the next value of the wrapper by the use of the lodash _.prototype.next() method.
Javascript
// Requiring lodash library const _ = require( 'lodash' ); // Initializing wrapped value let 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: In this example, the output is ‘undefined’ as there is no value to print.
Javascript
// Requiring lodash library const _ = require( 'lodash' ); // Initializing wrapped value let wrapper = _([]); // Calling prototype.next() method let result = wrapper.next(); // Displays output console.log(result); |
Output:
{ done: true, value: undefined }
Example 3: In this example, only the defined value is returned to the output.
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 }
Reference: https://lodash.com/docs/4.17.15#prototype-next
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