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How to use Generator Function In Javascript

Using Array.prototype.filter and Symbol.iterator

The generator function can be used to yield non-empty values which can be further used to create a custom iterator that skips empty values.

Syntax: 

// Generator function
function* skipEmptyValues(arr) {}

Example: The below code explains the use of generator function to create custom iterator that skips empty values.

Javascript




function* skipEmptyValuesIterator(arr) {
    for (let value of arr) {
        if (value !== '') {
            yield value;
        }
    }
}
 
const myArray = ['GFG', '', 3, '', 'JavaScript'];
const iterator = skipEmptyValuesIterator(myArray);
 
for (let value of iterator) {
    console.log(value);
}
 






                        









													
													
												

												
												

													
													
Output


GFG
3
JavaScript




													
													
												

												
											

											
											

												
How to Create Custom Iterator that Skips Empty Value in JavaScript ?

												
												

													
													
Iterators are important concepts in the world of programming. They allow developers to traverse and manipulate collections of data more efficiently and flexibly. JavaScript, being a high-level programming language, also supports iterators. You can even create a custom iterator that skips the empty values using the below methods:

													
													
												

												
												

													
													


Table of Content


    

  • Using Generator Function 
    • 

  • Using Array.prototype.filter and Symbol.iterator
    • 

  • Using Iterator Protocol with Custom Class
    • 

  • Using Array.prototype.entries and Symbol.iterator
    • 

  • Using Array.prototype.reduce and Symbol.iterator
    • 




													
													
												

												
											

										


										
										

											
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												Using Array.prototype.filter and Symbol.iterator