Javascript Operators - Revision history

Cholmondely: Added link

2021-11-06T19:58:05Z

Added link

Svengali at 11:30, 2 June 2012

2012-06-02T11:30:33Z

Svengali: Typos

2009-08-03T21:44:06Z

Typos

Svengali: Added additional info about bitwise shifting operations

2009-08-01T14:48:31Z

Added additional info about bitwise shifting operations

Eric Walch: Layout change

2009-07-23T19:21:38Z

Layout change

Eric Walch: Added a list of javascrips operators

2009-07-23T19:05:24Z

Added a list of javascrips operators

New page

== Javascript Operators ==
Below is a listing of often used operators in javascript to help understand some of the used code in Oolite scripts.

=== Artithmetic Operators ===

'''Operator Description'''
+ Addition 
- Subtraction 
* Multiplication 
/ Division 
% Modulus (remainder of a division) 
++ Increment (++X means increment by one X before use and X++ means increment X after use 
-- Decrement (--X means idecrement by one X before use and X-- means decrement X after use 
=== Assignment Operators ===
'''Operator Description'''
= Assign 
+= Add and assign. For example, x+=y is the same as x=x+y. 
-= Subtract and assign. For example, x-=y is the same as x=x-y. 
*= Multiply and assign. For example, x*=y is the same as x=x*y. 
/= Divide and assign. For example, x/=y is the same as x=x/y. 
%= Modulus and assign. For example, x%=y is the same as x=x%y. 
=== Comparison Operators ===
'''Operator Description'''
== Is equal to 
=== Is identical (is equal to and is of the same type) 
!= Is not equal to 
!== Is not identical 
> Greater than 
>= Greater than or equal to 
< Less than 
<= Less than or equal to 
=== Logical/boolean Operators ===
'''Operator Description'''
&& and 
|| or 
! not 
=== String Operators ===
In JavaScript, a string is simply a piece of text. 

'''Operator Description'''
= Assignment 
+ Concatenate (join two strings together) 
+= Concatenate and assign 
=== Bit Operators ===

'''Operator Description'''
& Bitwise and
| Bitwise or
^ Bitwise exclusive or (xor)
<< Schift one bit to the left
>> Schift one bit to the right
~ Flip all bits (invert 0 to 1 and 1 to 0)

[[Category:Oolite scripting]]

@@ Line 2: / Line 2: @@
 Below is a listing of often used operators in javascript to help understand some of the used code in Oolite scripts. A quick introduction and further links can be found in [[Scripting_Oolite_with_JavaScript|Scripting Oolite with JavaScript]].
-=== Artithmetic Operators ===
+=== Arithmetic Operators ===
 '''Operator	Description'''
@@ Line 53: / Line 53: @@
  >>	Shift bits to the right, keep sign (9 >> 2 yields 2 BUT -9 >> 2 yields -3)<br>
  >>>	Shift bits to the right, discard sign bit (9 >>> 2 yields 2 BUT -9 >>> 2 yields 1073741821)<br>
 [[Category:Oolite scripting]]

@@ Line 1: / Line 1: @@
 == Operators used in Javascript ==
-Below is a listing of often used operators in javascript to help understand some of the used code in Oolite scripts.
+Below is a listing of often used operators in javascript to help understand some of the used code in Oolite scripts. A quick introduction and further links can be found in [[Scripting_Oolite_with_JavaScript|Scripting Oolite with JavaScript]].
 === Artithmetic Operators ===

@@ Line 48: / Line 48: @@
  |	Bitwise or<br>
  ^	Bitwise exclusive or (xor)<br>
  ~	Flip all bits (invert 0 to 1 and 1 to 0)<br>
 [[Category:Oolite scripting]]

@@ Line 48: / Line 48: @@
  |	Bitwise or<br>
  ^	Bitwise exclusive or (xor)<br>
- >>	Schift one bit to the right<br>
+ <<	Schift bits to the left (9 << 2 yields 36)<br>
  ~	Flip all bits (invert 0 to 1 and 1 to 0)<br>