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Jiří Richter Artaud

  • Urbandroid Team
  • Prague, Czech Republic
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@fer-ri
fer-ri / background-image.ts
Created May 24, 2016 06:33
Background Image Style Directive for Angular 2 and Ionic 2
import {Directive, ElementRef, Input} from '@angular/core';
@Directive({
selector: '[background-image]'
})
export class BackgroundImage {
private el: HTMLElement;
constructor(el: ElementRef) {
this.el = el.nativeElement;
@robmathers
robmathers / groupBy.js
Created October 25, 2018 23:18
A more readable and annotated version of the Javascript groupBy from Ceasar Bautista (https://stackoverflow.com/a/34890276/1376063)
var groupBy = function(data, key) { // `data` is an array of objects, `key` is the key (or property accessor) to group by
// reduce runs this anonymous function on each element of `data` (the `item` parameter,
// returning the `storage` parameter at the end
return data.reduce(function(storage, item) {
// get the first instance of the key by which we're grouping
var group = item[key];
// set `storage` for this instance of group to the outer scope (if not empty) or initialize it
storage[group] = storage[group] || [];