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Learning JavaScript Data Structures and Algorithms - Third Edition
book

Learning JavaScript Data Structures and Algorithms - Third Edition

by Loiane Avancini
April 2018
Beginner to intermediate content levelBeginner to intermediate
426 pages
10h 19m
English
Packt Publishing
Content preview from Learning JavaScript Data Structures and Algorithms - Third Edition

Iterator functions

Sometimes, we need to iterate the elements of an array. We have learned that we can use a loop construct to do this, such as the for statement, as we saw in some previous examples.

JavaScript also has some built-in iterator methods that we can use with arrays. For the examples in this section, we will need an array and a function. We will use an array with values from 1 to 15 and a function that returns true if the number is a multiple of 2 (even) and false otherwise. The code is presented as follows:

function isEven(x) { 
  // returns true if x is a multiple of 2. 
  console.log(x); 
  return x % 2 === 0 ? true : false; 
} 
let numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]; 
return (x % 2 == 0) ? true : false can ...
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Learning JavaScript Data Structures and Algorithms

Learning JavaScript Data Structures and Algorithms

Loiane Avancini

Publisher Resources

ISBN: 9781788623872Supplemental Content