ECMAScript 6 returns JavaScript to original intent. news analysis. Oct 23, 2014 7 mins. ... Husain: A function returns a value. The thing about a function is the consumer is in control.

In functional programming, there are two varieties of functions: first-order functions and pure functions. First-order functions. A first-order function takes standard data types (string, number, ...

const makePair = (value1, value2) => { return => { return value1; }; }; Unfortunately, this function immediately “forgets” the second value and never does ...

The following JavaScript functions provide developers with everything they need: concat() – Combines the text of two or more strings and returns a new string. indexOf() – Returns the starting ...