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function getOnlyModifiedValues(originalValues, newValues) {
    let isObject = (o) => (typeof o === 'object' && o !== null);
    let isEquals = (a, b) => (String(a).trim() === String(b).trim());
    let isEmpty = (o) => (Object.keys(o).length === 0);

    function diff(a, b) {
        return Object.keys(b).reduce((value, key) => {
            let v1 = a[key];
            let v2 = b[key];

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import { AfterContentInit, Component, Input, OnChanges, SimpleChanges } from '@angular/core';

interface TabInterface{
    active: boolean;
    name: string
}

@Component({
    selector: 'app-tab',
    template: `<div class="tab" [hidden]="!active"><ng-content></ng-content></div>`,

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import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Observable, ReplaySubject } from 'rxjs';

@Injectable()
export class CachedService {
    data$: Observable<any> = this.dataSubject.asObservable();

    private dataSubject = new ReplaySubject<any>(1);

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import { Injectable } from '@angular/core';

const Polyglot = require('node-polyglot'); // https://www.npmjs.com/package/node-polyglot

// Example of pl_pl.json file: { "Hello world":"Witaj świecie" }
let dictionaries = {
    pl_pl: require('./pl_pl/pl_pl.json'),
    en_gb: require('./en_gb/en_gb.json')
};

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// Source: https://stackoverflow.com/a/8435261
function weightedRand(spec) {
    let i, j, table = [];

    for (i in spec) {
        // The constant 10 below should be computed based on the
        // weights in the spec for a correct and optimal table size.
        // E.g. the spec {0:0.999, 1:0.001} will break this impl.
        for (j = 0; j < spec[i] * 10; j++) {
            table.push(i);

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// https://jsfiddle.net/koldev/cW7W5/
var saveData = (function () {
    var a = document.createElement("a");
    document.body.appendChild(a);
    a.style = "display: none";
    return function (data, fileName) {
        var json = JSON.stringify(data),
            blob = new Blob([json], {type: "octet/stream"}),
            url = window.URL.createObjectURL(blob);
        a.href = url;

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# Random 4-letter word from the dictionary
$ shuf -n4 /usr/share/dict/words | tr -d '\n'

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function addDelayedEventListener($el, eventName, action) {
    const listener = async function (event) {
        $el.removeEventListener(eventName, listener);
        $el.disabled  = true;

        await action.call(action, event);

        $el.disabled = false;
        addDelayedEventListener($el, eventName, action);
    };

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Multiple SSH Keys settings for different github account

create different public key

create different ssh key according the article Mac Set-Up Git

$ ssh-keygen -t rsa -C "your_email@youremail.com"

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class AnimationLoop {
    constructor(fps = 24) {
        this.updateFn = null;
        this.id = 0;
        this.setFps(fps);
    }

    onUpdate(fn) {
        this.updateFn = fn;
    }