Mastering JavaScript Functional Programming - Second Edition

Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "Let's review our once() function."

A block of code is set as follows:

function newCounter() {  let count = 0;  return function() {    count++;    return count;  };}const nc = newCounter();console.log(nc()); // 1console.log(nc()); // 2console.log(nc()); // 3

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

function fact(n) {  if (n === 0) {    return 1;  } else {    return n * fact(n - 1);  }}console.log(fact(5)); // 120

Bold