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

30 Part I ■ Learning to ProgramThe second example throws an error that you should explore a bit more.What Lua sees here is an identifier (x), the assignment operator (=), and astring (’Isn’). Because Lua doesn’t require any whitespace between mostoperations, it immediately starts the next part of the expression, which beginswith the identifier t. The next thing the interpreter sees is another identifiercalled it, and doesn’t know what to do with it. In this case, the interpreterinfers that you meant to use the assignment operator and errors out with thissuggestion.You can get around this by escaping the tick mark that is inside the string totell Lua that it’s part of the string instead of the end of it. Here’s an example:> x = 'Isn\’t it nice?'> print(type(x))stringYou tackle the details of string escaping shortly.Double Quote (’’)Thedoublequote(“) can be used the same way as the single quote, with thesame caveat of needing to escape embedded quote characters. Here are someexamples:> x = “Hello“> print(type(x))string> x = “Isn’t it nice?“> print(type(x))string> x = “I play the game “World of Warcraft““stdin:1: '=' expected near 'of'The second works because the tick mark isn’t being used to delimit thequote, but the inner quote in the third example needs to be escaped with abackslash:> x = “I play the game, \“World of Warcraft\““> print(type(x))stringBracket Quote ([[ ]])Lua has the concept of a long quote that enables you to include multiplelines and internal quote characters. These quotes begin with the open bracketcharacter ([), have any number of equal signs (=), including 0, and then