Mutation Operators

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Supported platforms: Platform android.pngPlatform ios.pngPlatform mac.pngPlatform pc.png
Available since: Gideros 2017.11

Description


Operators to mutate a value.

a += b   Add 'b' to 'a'.
a -= b   Subtract 'b from 'a'.
a *= b   Multiply 'a' by 'b', result in 'a'.
a /= b   Divide 'a' by 'b', result in 'a'.
a %= b   The result of 'a%b' is placed in 'a'.
a ^= b   The result of 'a^b' is placed in 'a'. ^ is faster than a=math.pow(a,b)
a ^= 0.5   The result is faster than a=math.sqrt(a)

Examples

Simple larger example

score+=1  -- faster and less typing than score=score+1


"getDistance" function:

--Non-optimized variant (5x slower):
function getDistance( x1, y1, x2, y2 )
	return math.sqrt ( math.pow ( x2 - x1, 2 ) + math.pow ( y2 - y1, 2 ) )
end

--Optimized variant (5x faster):
function getDistance2( x1, y1, x2, y2 )
	return ((x2 - x1)^2 + (y2 - y1)^2)^0.5
end

Methods

Events

Constants