dodyg

#Intro

Kotlin is a new programming language for the JVM. It produces Java bytecode, supports Android and generates JavaScript. The latest version of the language is Kotlin M5.3

Kotlin project website is at kotlin.jetbrains.org.

All the codes here can be copied and run on Kotlin online editor.

Let's get started.

twokul

Hidden classes in JavaScript and Inline Caching

Knowing how internals work is always a good. Pretty much for everything. Cars, trains, computers, you name it. It gives you an insight on what happens under the hood. You also act/react differently based on this knowledge.

As you might have guessed, it’s also true for web development. Knowledge of CSS transitions allows you to achieve better performance and not to use JavaScript in most cases. Knowledge of V8 internals allows you to write more performant JavaScript code. So let’s talk about V8 a little.

A little about V8

V8 is a JavaScript engine built by Google. Firefox built SpiderMonkey, Opera built Carakan and Microsoft built Chakra. One very important difference between V8 and other JavaScript engines is that V8 doesn’t generate any intermediate code. It compiles JavaScr

aaronshaf

Credit: Some phraseology taken from MDN

Today we are going to walk through some JavaScript miscellany. Hopefully it causes some good discussion, and serves as a refresher. Please ask questions and make interesting comments!

April Fool's

0.1 + 0.2 === 0.3

alexhawkins

'use strict';

/*****************NATIVE forEACH*********************/

Array.prototype.myEach = function(callback) {
    for (var i = 0; i < this.length; i++)
        callback(this[i], i, this);
};

//tests

robertjpayne

#import <Foundation/Foundation.h>
#import "RCTBridgeModule.h"

#define RCT_EXTERN_MODULE(objc_name, objc_supername) \
  RCT_EXTERN_REMAP_MODULE(objc_name, objc_name, objc_supername)

#define RCT_EXTERN_REMAP_MODULE(js_name, objc_name, objc_supername) \
  objc_name : objc_supername \
  @end \
  @interface objc_name (RCTExternModule) <RCTBridgeModule> \

outro56

Contents

• Articles
• Algorithms
• Coding
• Guides
• Language-specific
  • JavaScript
• Python

cmmartin

/*
* EXAMPLE USAGE
* This component is text that will bounce on mount and 
* every time `this.props.someProperty` changes.
* Too bad react native doesn't support decorators yet :/
*/

import React, {
  Component,
  StyleSheet,

chourobin

Bridging Native & React for iOS & Android

js -> native

• Simple Example
• Callbacks
• Promises
• Properties

native -> js

Ashoat

// @flow

import type {
  StyleObj,
} from 'react-native/Libraries/StyleSheet/StyleSheetTypes';

import React from 'react';
import PropTypes from 'prop-types';
import { Text, View, StyleSheet } from 'react-native';
import invariant from 'invariant';

joshbuchea

Semantic Commit Messages

See how a minor change to your commit message style can make you a better programmer.

Format: <type>(<scope>): <subject>

<scope> is optional

Example