jupegarnica

const isString = value => typeof value === 'string';
const isSymbol = value => typeof value === 'symbol'
const isUndefined = value => typeof value === 'undefined'
const isDate = obj => Object.prototype.toString.call(obj) === '[object Date]'
const isFunction = obj => Object.prototype.toString.call(obj) === '[object Function]';
const isComplexDataType = value => (typeof value === 'object' || typeof value === 'function') && value !== null;
const isValidBasicDataType = value => value !== undefined && !isSymbol(value); 
const isValidObj = obj => Array.isArray(obj) || Object.prototype.toString.call(obj) === '[object Object]';
const isInfinity = value => value === Infinity || value === -Infinity

jupegarnica

function proxy(func) {
    let instance;
    let handler = {
        construct(target, args) {
            if (!instance) {
                // Create an instance if there is not exist
                instance = Reflect.construct(func,args)
            }
            return instance
        }

jupegarnica

const throttle = (func, time = 17, options = {

    leading: true,
    trailing: false,
    context: null
}) => {
    let previous = new Date(0).getTime()
    let timer;
    const _throttle = function (...args) {
        let now = new Date().getTime();

jupegarnica

const debounce = (func, time = 17, options = {
    leading: true,
    context: null
}) => {
    let timer;
    const _debounce = function (...args) {
        if (timer) {
            clearTimeout(timer)
        }
        if (options.leading && !timer) {

jupegarnica

:root {
  --primary-color-h: 156;
  --primary-color-s: 50%;
  --primary-color-l: 50%;
  --primary-color: hsl(var(--primary-color-h), var(--primary-color-s), var(--primary-color-l));
  --primary-color--light: hsl(var(--primary-color-h), var(--primary-color-s), calc(var(--primary-color-l) + var(--lighten)));
  --primary-color--dark: hsl(var(--primary-color-h), var(--primary-color-s), calc(var(--primary-color-l) + var(--darken)));
  --secondary-color: hsl(calc(var(--primary-color-h) + 180), var(--primary-color-s), var( --primary-color-l));
  --lighten: 15%;
  --darken: -15%;

jupegarnica

// ensure the keys being passed is an array of key paths
// example: 'a.b' becomes ['a', 'b'] unless it was already ['a', 'b']
const keys = ks => Array.isArray(ks) ? ks : ks.split('.')

// traverse the set of keys left to right,
// returning the current value in each iteration.
// if at any point the value for the current key does not exist,
// return the default value
const deepGet = (o, kp, d) => keys(kp).reduce((o, k) => o && o[k] || d, o)

jupegarnica

MySQL

Getting started

• http://www.sqlteaching.com/
• https://www.codecademy.com/learn/learn-sql

Related tutorials

• MySQL-CLI
• Analyzing Business Metrics
• SQL joins infografic

jupegarnica

function union(setA, setB) {
    var _union = new Set(setA);
    for (var elem of setB) {
        _union.add(elem);
    }
    return _union;
}

function intersection(setA, setB) {

jupegarnica

Initialize

gitflow	git
git flow init	git init
	git commit --allow-empty -m "Initial commit"
	git checkout -b develop master

Connect to the remote repository

jupegarnica

const createStore = (reducer, initialState = {}, middlewares = []) => {
    let state = initialState;
    const listeners = [];

    // final step - call the reducer and invoke the listeners
    let finalMiddleware = (action) => {
      state = reducer(state, action);
      listeners.forEach(listener => listener());
      return state;
    }