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Good:

• JSTool

To be avoided:

• JSON Viewer - formatting removes characeters.

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Documented APIs:

• Github
• Twitter
• Facebook Graph API
• Stripe
• Instagram
• Strava
• RunKepper
• Feedly

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// Use Gists to store code you would like to remember later on
console.log(window); // log the "window" object to the console

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[1,2].forEach(function (a, b, c) {
  console.log('printing: ' + a);
});

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var arr = [1,2], i=0, len=arr.length;

for (; i<len; i++) {
  console.log('printing: ' + arr[i]);
}

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// returns 9
parseInt('09', 10);

// returns 0!
parseInt('09');

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// no caching of iteration size
for (var i=0; i<myArray.length; i++) {}

// caching of iteration size - ugly version
var length = myArray.length;
for (var i=0; i<length; i++) {}

// caching of iteration size - nice version
for (var i=0, len=myArray.length, i< len; i++) {}

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1 == '1'; // true
1 === '1'; // false
1 === 1; //true

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Car = {
    doors: 0,
    fuel: '',
    color: '',
    changeFuel: function (fuel) {
        fuel === 'petrol' ? Car.fuel = 'petrol' : Car.fuel = 'diesel';
    }
};

Car.changeColor = function (color) {

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function Car (doors, fuel, color) {

    this.doors = doors;
    this.color = color;
    this.fuel = fuel;

    this.changeFuel = function () {
        if (this.fuel === 'petrol') {
            this.fuel = 'diesel';
        } else {