This function does the opposite of
StringSplit; it joins strings from an AHK-array with a delimiter, stopping at the first empty array element.
Code:
Var1 := "a"
Var2 := 1.234
Var3 := "b"
MsgBox % StringJoin("Var")
StringJoin(array, delimiter = ";")
{
Loop
If Not %array%%A_Index% Or Not t .= (t ? delimiter : "") %array%%A_Index%
Return t
}
Well, .....
I wasn't sure in which section I should post this. My point is: I wonder why this function works!
The first argument is the identifier of the array as text. The function accesses the array elements and joins them. As planned.
However, it shouldn't be able to do this
, because there is no
Global declaration inside the function nor a local variable is declared (that would supersede the
Global declaration).
But it's getting even better
. A code, that accesses directly an array element inside the function will make it invisible for the function. No matter whether the code is executed. In the following example the function returns only 2 elements, because the 3rd element doesn't exist.
Code:
StringJoin(s, d=";")
{
Loop
If Not %s%%A_Index% Or Not t .= (t ? d : "") %s%%A_Index%
Return t
dummy := Var3 ; This code won't even be executed. It may just as well be written at the top of the function.
}
After some experiments I conclude, that the default localization of function variables only applies to directly accessed variables, but not to variables, which names have to be pieced together before being used. Perhaps a preprocessor has to "hide" all non global variables in each function during the start of the script, but can of course only apply this to non dynamic variables?
I don't know whether this was discussed before, but for me this is not a bug, but a useful feature.
Chris, please don't change this!
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