ES6.md

Javascript on ES6

Udemy course ES6 Javascript Development from scratch. Get practice with live examples and learn exactly where to apply ES6 features.

Array Helpers

For Each

Map Helper

Filter Helper

function reject(array, iteratorFunction) {
    console.log(iteratorFunction)
    let permarr = array.filter(iteratorFunction)
    console.log(permarr + " permarr " + Array.isArray(permarr))
    console.log(array + " array " + Array.isArray(array))
    let retarr = array.filter((element) => { return !(permarr.includes(element)) })
    console.log(retarr+ " retar")
  return array.filter((vele) => { return !(permarr.includes(vele)) })
}

Find Helper

var ladders = [
  { id: 1, height: 20 },
  { id: 3, height: 25 }
];

function findWhere(array, criteria) {
    console.log(Object.keys(criteria) + " criteria keys");
    console.log(Object.values(criteria) + " criteria values");
  return array.find(arr => { 
    console.log(typeof(arr[(Object.keys(criteria))]) + " # " + Number(Object.values(criteria)));
    console.log(arr[(Object.keys(criteria))] === Number(Object.values(criteria)))
    return arr[(Object.keys(criteria))] === Number(Object.values(criteria)) })
}

console.log(findWhere(ladders, { height: 25 })); 

function balancedParens(prev, parStr) {

}

Every and Some Helper

Every returns a boolean for every element evaluated and compared with AND

Some returns a boolean comparing every element with OR

Reduce Helper