[JASS] Is there a SubString like function just for Integers?

[emperor_d3st]

Is there a SubString-like function just for Integers?

Hi, I was looking for a method to get the xth digit of an integer but I couldn't find a solution.
Is there a way to do this with an already implemented function or something?

I created a tiny function for myself, but I don't want to litter my map with unnecessary stuff.

function SubInt takes integer source, integer start, integer end returns integer
return S2I(SubString(I2S(source), start, end))
endfunction

 

[GhostWolf]

No .

 

[emperor_d3st]

Okay, thank you.

 

[TheDamien]

Converting to a substring then back again is a pretty inefficient way of doing it.

function SubInt takes integer i, integer j, integer k returns integer
    set k = R2I(Pow(10, k-j))
    set i = i/R2I(Pow(10, j))
    return (i-(i/k)*k)
endfunction

call BJDebugMsg(I2S(SubInt(123456789, 1, 5))) // displays "5678"

 

[NoNZealot]

return (i-(i/k)*k)

Wouldn't this return to 0? Since -i/k*k = -i and i-i = 0 ?

 

[TheDamien]

Wouldn't this return to 0? Since -i/k*k = -i and i-i = 0 ?

It is integer division.

 

[PurplePoot]

Pow is also known to be slow, so I doubt that's a much better solution.

 

[TheDamien]

Pow is also known to be slow, so I doubt that's a much better solution.

You're probably right, but the Pows make the concept much easier to demonstrate.

 

[emperor_d3st]

Yea, I was thinking about solution with division and R2I conversion too, but I think there isn't much difference.
I'll stick with stringconverting, but thanks for the comments.