ANDROID BEST BUY

Somethings I learnt from Crockford :)
Keep it right always :)

function a()  //Seems to be working but not :)
{
    return
    {
        name: a
    };    
}
console.log(a().name);

function a() {  //Keep braces always right. It works :)
    return {
        name: a
    };    
}
console.log(a().name);

There is no concept of block level scoping in javascript but the syntax exists. So, the former falls in that block hole and returns undefined.

Its not c or c++

var i = tamil;
for(var i = 0;i < 10;i++){
    
}
console.log(i);

This is misleading because declaring var i @ initialization of for-loop doesnt mean i has the scope of the loop & it doesnt interfere with the one out.
There is no other scope than function scope in javascript. All our declarations are hoisted up to function scope no matter where ever they are. So, dont get misleaded :)

All you spend is 0 but you get a lot :)

function sample() {
    ....do something
    var j = 10;
    ....do something
}

As I mentioned earlier there are no other scopes other than functions. So, what happens here is

function sample() {
    var j = undefined; // Hoisted to the top always. Better we do it meaningfully as var j = 10;
    ....do something
    j = 10;
    ....do something
}

Keep the declarations @ the beginning always. It costs you nothing but it might save your time in future :)

You might know what you are doing :)

if(a = b) { //1
    
}

if(a == b) a(); c(); //2

You might know what you are doing, but dont expect others
I might think for 1, It as either

if(a == b) { //typo
    
}
//or 
a = b;
if(a) {
    
}

For 2

if(a == b) {
    a();
    c();
}
//or
if(a == b) {
    a();
}
c();

Be clear for others too :) It helps

ALL is always bigger than LOT :) U gotta believe :P

0 == false //true
0==false //true
false==false //false

These might not affect in lots of places but lot !== all :P So, Always use

0 === false //false
0 === false //false
false === false //false

Without with

var test = {    //1
             name: xxx,
             age: 12
}
var age = 100;
with(test) {
    age = 200;
} 
console.log(test.age);
console.log(age);

var test = {    //2
             name: xxx,
}
var age = 100;
with(test) {
    age = 200;
} 
console.log(test.age);
console.log(age);

1 & 2 are not the same. So, dont rely on unreliable things out there :)

I think Im becoming Crockfords fan :)