[vJASS] Even more vJASS

[Starquizer]

Now that I know about structs, methods, library, scope, statics, private and public and all this basic things.

I need to learn the rest so the first thing I am asking, what is "operator" I can't understand a word from the JassHelper manual, could someone give me a detailed explanation, please ?

 

[Lender]

operators are method calls built inside the program language

operators are : " = " " < " " > " " != " etc..

with operator keyword, you can make own operators like a method call

eg:

method operator i2 takes nothing returns integer
return i*i
endmethod

method operator i2= takes integer j returns nothing
set i = j/i
endmethod

in the egsample I made an operator i2 and a i2= . See how it ease the syntax

without operator:

set c = SquareRoot(i*i + i*i)
set i = j/i

with operators:

set c = SquareRoot(i2+i2)
set i2=j

its not a big difference here but can do realy comlex things with it

just think of it that the " i " represents something long and complicated

----------
method operator x2 takes nothing returns integer
return GetUnitX(struct.someunit)*GetUnitX(struct.someunit)
endmethod

method operator y2 takes nothing returns integer
return GetUnitY(struct.someunit)*GetUnitY(struct.someunit)
endmethod

without operator:

c = SquareRoot(GetUnitX(struct.someunit)*GetUnitX(struct.someunit)+GetUnitY(struct.someunit)*GetUnitY(struct.someunit))

with operator:

c = SquareRoot(x2+y2)

its only a basic thing you can use operators for. try out some thing

 

[Starquizer]

I don't understand this: i2 and i2= what is this " = " also i2= takes an integer j how can I call this method operator ?

 

[Lender]

method asdf takes nothing returns nothing
any action
endmethod

u call this with --> call asdf()

the operator i2 and i2= is the call itself

when you write this : set i2=j

i2= calls the method and takes " j " as the parameter

 

[Starquizer]

I read about interface and understand what it do (about 75%) but I don't know how useful it can be.