JavaScript Pristine notes _javascript tips

To add a method to a constructor prototype
Function.method=function (Name,func) {
This.prototype.name=func;
}

Number.method ("Integer", function () {
Return Math[this < 0? ' Ceil ': ' Floor '] (this);
});
( -10/3). Integer ();//-3

String.method ("Trim", function () {
Return This.replace (/^\s+|\s+$/g, "");
})
"Neat". Trim ();//neat
Closed Bag
var quo = function (status) {
return{
Get_status:function () {
return status;
}
}
}
var myquo = new Quo ("amazed");
Myquo.get_status ();//amazed

Closure Classic Example Fragment
for (Var i=0;i<lis.length;i++) {
Lis.onclick=function (i) {
return function () {
alert (i);
};
} (i);
}

Apply
Function.method ("Curry", function () {
var slice=array.prototype.slice,
args = slice.apply (arguments),
That's = this;
return function () {
Return that.apply (null,args.contact (arguments));
}
})

Memory recursion
var memoization = function (memo,usefn) {//abstract
var fn = function (n) {
var result = Memo[n];
if (typeof result!== ' number ') {
Result=usefn (Fn,n);
Memo[n]=result;
}
return result;
};
return FN;
};
var factorial= memoization ([0,1],function (Fn,n) {//recursive form
RETURN fn (n-1) *n
});
Factorial (5)//120