Difference between revisions of "Mutation Operators"
From GiderosMobile
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=== Examples === | === Examples === | ||
'''Simple larger example''' | '''Simple larger example''' | ||
| − | < | + | <syntaxhighlight lang="lua"> |
score+=1 -- faster and less typing than score=score+1 | score+=1 -- faster and less typing than score=score+1 | ||
</source> | </source> | ||
'''"getDistance" function''' ('''see also the new <big>[[Math.distance]]</big> function''') | '''"getDistance" function''' ('''see also the new <big>[[Math.distance]]</big> function''') | ||
| − | < | + | <syntaxhighlight lang="lua"> |
--Non-optimized variant (5x slower): | --Non-optimized variant (5x slower): | ||
function getDistance( x1, y1, x2, y2 ) | function getDistance( x1, y1, x2, y2 ) | ||
Revision as of 15:28, 13 July 2023
Supported platforms: 
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 <syntaxhighlight lang="lua"> score+=1 -- faster and less typing than score=score+1 </source>
"getDistance" function (see also the new Math.distance function) <syntaxhighlight lang="lua"> --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 </source>
Methods |
EventsConstants |
