Javascript on CodingBlast

JavaScript Collections - Set and Map

Tue, 27 Feb 2018 07:14:18 +0000

Introduction

In this post we will get familiar with two different collections in JavaScript:

Set
Map

In one of the next posts we will also talk about two similar collections:

WeakSet
WeakMap

They were all introduced to JavaScript spec with ES2015, also known as ES6.

Organising JavaScript helpers

Sat, 09 Dec 2017 09:24:39 +0000

Introduction

Since 2015 ECMAScript switched to yearly releases and they also switched to new naming format: ES_{Year}.

With the arrival of ES6 or to be correct, ES 2015 we got support for classes in JavaScript. Also, we got new keywords: import and export. And this can make the code much cleaner and easier to work with.

Generators in JavaScript - Introduction

Sat, 15 Apr 2017 19:29:55 +0000

Introduction to generators

A generator function is a special kind of function that was introduced in ES2015 (ES6). In JavaScript once we start a function it has to run to its completion. However, generator functions enable us to create functions that another code can reenter multiple times. Furthermore, nothing from outside of the generation function can make it exit/pause. Generator function pauses itself when it runs into a yield expression. Once a execution reaches yield expression, generator can not continue execution on its own. Something from outside has to continueits execution.

JavaScript Iterators

Wed, 12 Apr 2017 19:40:44 +0000

Introduction

When we talk about iterators there are two main protocols to be aware of: iterables and iterators.

Iterables are data structures that can be iterated. Such example is array, since we can loop through every element of array.

JavaScript Symbols

Sun, 09 Apr 2017 08:29:06 +0000

JavaScript Symbols - Introduction

Symbol is a primitive data type in JavaScript. Symbols represent a way to define object keys that will never get in conflict with other keys.

Since they are one of the primitive data types they are immutable.

Decorators with TypeScript

Thu, 06 Apr 2017 10:55:26 +0000

Introduction

JavaScript decorators are a special kind of declaration. Decorators can be attached to both class declaration and class method declaration. Furthermore, they can be attached to accessor and property declaration. Finally, they can also be attached to parameter declaration.