yuval-a

// Check if objects are equal (have the same keys with the same values), all values must be primitives (no functions, objects or arrays)

function areObjectsEqual(obj1, obj2) {
    let obj1KeysCount = 0;
    for (const key in obj1) {
        if (obj1[key] !== obj2[key]) return false;
        obj1KeysCount++;
    }
    return Object.keys(obj2).length === obj1KeysCount;
}

yuval-a

const G = (1 + Math.sqrt(5)) / 2; // Golden Ratio
Math.round(G ** n / Math.sqrt(5));

yuval-a

* `--trace_gc`: Logs garbage collection operations.
* `--inspect`: Runs node in debugging mode. open Chrome with `chrome://inspect` to see the debug session.

yuval-a

function str_length(str) {
  let length = 0, nikud_chars = /[ְֱֲֳִֵֶַָֹֻּׁׂ]/;
  for (let i=0,len=str.length;i<len;i++)
    length += nikud_chars.test(str[i]) ? 0 : 1;
  return length;
}

yuval-a

/* events should be an object containing DOM event names as keys (click, keyup, hover...), with the values as objects having
 * element "names" as keys, and event handler functions as values. E.g.: 
 * { 
 *    click: { 
 *       button1() { // handle button1 click }, 
 *       button2() { // handle button2 click },
 *    keyup {
 *       input1() { // handle input1 keyup }
 *    }
 * }

yuval-a

import React, { Component } from 'react'

export default class ComponentName extends Component {

    constructor(props) {
        console.log ("constructor");
        super(props);
        this.state = {
        };
    }

yuval-a

// A quick Javascript class for creating a countdown timer

// leadingZero is a boolean, onTimeCallback will be called on each second update with the timer string
function Countdown(hours,minutes,seconds, leadingZero, onTimeCallback) {
	this.hours = hours;
  this.minutes = minutes;
  this.seconds = seconds;
  this.countdownStr = hours+":"+minutes+":"+seconds;
  this.onTime = onTimeCallback;
  this.leadingZero = leadingZero;

yuval-a

var url = '/.../';
var req = new XMLHttpRequest();
req.open('GET', url, true);
req.onreadystatechange = function () {
  if (req.readyState == 4 && req.status == 200)
      console.log(req.responseText);
    else
      console.log("Error loading page");
};
req.send();

yuval-a

// put 'req' on the elements of any required input fields. Don't use the 'required' attribute, otherwise the default action
// will trigger.

    function onFormSubmit(form) {
        var isValid = true;
        Array.prototype.forEach.call(form.elements, function (e) {
            if ((e.value.length == 0 || ! /\S/g.test(e.value)) && e.getAttribute('req') !== null && e.getAttribute('req') !== undefined) {
                isValid = false;
                e.value = "";
                if (e.getAttribute('req') == "") {

yuval-a

-webkit-transition: prop 0.2s ease;
-moz-transition: prop 0.2s ease;
-o-transition: prop 0.2s ease;
transition: prop 0.2s ease;