String prototype not available (AHK2) Topic is solved

[madsounds]

How to define new method/property in String class in AHK2?

This code results with "This variable has not been assigned a value. Specifically: String".

Code: Select all

String_IsBlank( str )
{
	if str ~= "^\s*$"
	{
		return true
	}
	return false
}

String.Prototype.DefineMethod( "IsBlank", (str) => String_IsBlank(str) )
String.Prototype.DefineProp( "Length", { get: (str) => StrLen(str) } )

[swagfag]

Code: Select all

%{}.GetMethod('DefineMethod')%(''.Base, "IsBlank", (str) => str ~= "^\s*$")
%{}.GetMethod('DefineProp')%(''.Base, "Length", { get: (str) => StrLen(str) } )

[madsounds]

Code: Select all

%{}.GetMethod('DefineMethod')%(''.Base, "IsBlank", (str) => str ~= "^\s*$")
%{}.GetMethod('DefineProp')%(''.Base, "Length", { get: (str) => StrLen(str) } )

Omg so complex Thanks for solution and optimization

[kczx3]

Code: Select all

%{}.GetMethod('DefineMethod')%(''.Base, "IsBlank", (str) => str ~= "^\s*$")
%{}.GetMethod('DefineProp')%(''.Base, "Length", { get: (str) => StrLen(str) } )

Is it like this because String Is not yet an exposed class?

[swagfag]

yes.

[lexikos]

The nature of the String prototype is explicitly documented under Primitive Values, which includes some "polyfill" to define the classes.

The classes do not exist yet, because there'd be no point defining them if they're never exposed to script. I think I was deferring it because I wasn't sure I wanted to reserve those names globally by default.

Also,

Code: Select all

%{}.GetMethod('DefineMethod')%(''.Base, "IsBlank", Func("IsSpace"))
%{}.GetMethod('DefineProp')%(''.Base, "Length", { get: Func("StrLen") } )

[madsounds]

The nature of the String prototype is explicitly documented under Primitive Values, which includes some "polyfill" to define the classes.

The classes do not exist yet, because there'd be no point defining them if they're never exposed to script. I think I was deferring it because I wasn't sure I wanted to reserve those names globally by default.

Also,

Code: Select all

%{}.GetMethod('DefineMethod')%(''.Base, "IsBlank", Func("IsSpace"))
%{}.GetMethod('DefineProp')%(''.Base, "Length", { get: Func("StrLen") } )

Oh thanks, didn't know about IsSpace

[kczx3]

@madsounds That makes two of us!

[lexikos]

Before IsSpace(x) there was x is 'space'. Before that (in v1) there was If x is space. Of course, neither of those were functions that you could pass to DefineProp/DefineMethod.