Mastering Immutable.js

Zipping lists of simple values

Imagine that you have three separate sources of information for one logical entity. For example, you have the following:

• A list of names
• A list of roles
• A list of ages

The glue between these lists is their indexes. Using the zip() method, you can bring the values of these lists together, as follows:

const names = List.of('Jeremy', 'Garry', 'Katie');const roles = List.of('Engineer', 'Designer', 'Programmer');const ages = List.of(34, 23, 36);names  .zip(roles, ages)  .map(v => v.join(', '))  .forEach(v => console.log('employee', v));  // -> employee Jeremy, Engineer, 34  // -> employee Garry, Designer, 23  // -> employee Katie, Programmer, 36

The names list uses the zip() method to join the roles and ages lists together. ...