Forword
The following javascript examples and notation demonstrate a few alternatives to well known methods for common tasks.
Advanced Notation
Tilde Operator
The tilde operator ~ literally equates to -(n+1). For example:
var a = ~1; //returns -2
var myString = "hello world";
~myString.indexOf("hello"); //returns true
Large Denary Numbers
Large denary numbers can be represented in short hand notation using the e operator. For example:
1e6; //returns 1000000.
Floor Checking
Math.floor is the traditional way to check for floor number values. There are two other short hand methods for performing the same operation, 0| and ~~. For example:
var n = 1.23;
Math.floor(n); //returns 1
~~n; //returns 1
0|n; //returns 1
Infinity
When checking for infinity you can use Infinity or you can use 1/0. For example:
Infinity == 1/0; //returns true;
Comma Chaining
The , can be used to chain statements together. For example:
with(document.body)style.backgroundColor="#fff",style.color="#000"
Rounding
Another way to round numbers up is to use n+.5|0 which is the equivalent to Math.round. However, this shortcut only works for positive numbers. For example:
3.2+0.5|0; //returns 3
3.5+0.5|0; //returns 4
String Linking
Strings have a built in method that will trans form them into a link and return the HTML. For example:
"godlikemouse".link("https://www.godlikemouse.com");
//returns <a href="https://www.godlikemouse.com">godlikemouse</a>
Bit Shifting
A quick way to divide by 2, or to raise something to the power of two is to shift the value. For example:
50>>1; //returns 25
20>>1; //returns 10
2<<1; //returns 4
8<<1; //returns 16
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