Wiley-World.of.Warcraft.Programming.A.Guide.and.Reference.for.Creating.WoW.Addons

Chapter 6 ■ Lua Standard Libraries 109> print(strconcat(“alpha:“, “beta:“, “gamma“))alpha:beta:gammagetglobal(name) takes a variable name as a string and returns the so-namedglobal variable, if it exists. This function is deprecated in World of Warcraft,meaning it should no longer be used but has not yet been removed. It isincluded, along with setglobal,incaseyouseeitincodefromolderaddons.> greek1, greek2, greek3 = “alpha“, “beta“, “gamma“> for i=1,3 do>> print(getglobal(“greek“ .. i))>> endalphabetagammaThe setglobal(name, value) function takes a variable name as a string,along with a corresponding value, and sets the so-named global variable tothe new value.> print(myVariable)nil> setglobal(“myVariable“, 17)> print(myVariable)17The debugstack([start[, count1[, count2]]]) function returns the currentcalling stack according to three inputs, as described in Table 6-9.Table 6-9: debugstack InputsINPUT TYPE DESCRIPTIONstart Number The stack depth at which to start the stack trace (defaults to 1,the function calling debugstack)count1 Number The number of functions to output at the top of the stack(default 12)count2 Number The number of functions to output at the bottom of the stack(default 10)This function only operates correctly in WoW. The standalone Lua interpreterhas its own method of providing stack traces.Function AliasesIn World of Warcraft, many of the library functions have been given shorteraliases so they are easier to access and type. Table 6-10 contains a full listing ofthese aliases.