brauliodiez

Currying

Currying is the act of turning a function into a new function that takes slightly fewer arguments, achieving a slightly more specific task.

http://macr.ae/article/es6-and-currying.html

Steps

Let's start by making a simple function that will sum up two numbers, using currying:

brauliodiez

Arrow functions

An arrow function has a shorter syntax that a function expression and does not bind its own this. arguments, super or new.target.

https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Functions/Arrow_functions

steps

Let's emulate an async call after a given timeout, if we do it in the traditional way, when

brauliodiez

Destructuring

The destructuring assignment syntax is a JavaScript expression that makes it possible to unpack values from arrays, or properties from objects, into distinct variables.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Destructuring_assignment

steps

Let's create a function that will concat a given client name and lastname.

brauliodiez

reduce

Reduce allows us calculate a total, applying an operation on every operation of an array.

This can save us lot of "for" loops (enhannce readibility).

steps

Let's implement a function that will sum up an array.

brauliodiez

Const / Let

Let:

• Variables that can change (be reassigned).
• Take in account block scope instead of function scope (e.g. issue var for or if).

Const:

• Variables that cannot be reassigned ()

More info: https://medium.com/javascript-scene/javascript-es6-var-let-or-const-ba58b8dcde75

brauliodiez

Backticks

Just using the new ES6 backticks to:

• Display multiline text.
• Embed variable values into strings (similar to print.format or c# string.format).

Steps

• Let's first create a multiline text using an ES6 approach:

brauliodiez

map

Map allows us to apply an operation to each item of an array, returning a new array that contains the items with the operation applied.

This can save us lot of "for" loops (enhannce readibility).

steps

Let's implement a function that will apply a discount all the elements of a given array.