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Offline Bytewave

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Today I learned...
« on: January 04, 2015, 11:28:47 am »
Today I learned that _G, the global table that stores all global data in Lua, can reference itself...
That means, a script like this:
Code: Lua
  1. print( _G['_G'] == _G )
... prints "true".

That also means that a script like this...
Code: Lua
  1. print(
  2.                 _G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G._G == _G
  3.         )
... also prints "true".

Funny how programming can work, eh?
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Offline Megiddo

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Re: Today I learned...
« Reply #1 on: January 10, 2015, 11:25:04 am »
It's like googling the word "recursion". :)
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Offline Bytewave

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Re: Today I learned...
« Reply #2 on: January 10, 2015, 05:21:29 pm »
Quote from: Megiddo on January 10, 2015, 11:25:04 am
It's like googling the word "recursion". :)
I know what recursion is. :P
I just find such things as this slightly humorous—for some reason, I tend to exhale sharply out my nose when I see something like this at work.
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Offline MrPresident

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Re: Today I learned...
« Reply #3 on: January 10, 2015, 08:40:52 pm »
He wasn't implying that you didn't know what recursion meant.

Literally.. google it. It's an easter egg.
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Offline Bytewave

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Re: Today I learned...
« Reply #4 on: January 10, 2015, 11:28:37 pm »
Quote from: MrPresident on January 10, 2015, 08:40:52 pm
He wasn't implying that you didn't know what recursion meant.

Literally.. google it. It's an easter egg.
Okay, let's see here...
*** enters "recursion" into Chrome Omnibar
Did you mean: recursion
... uh...
... Wait a sec—OOOOOOHHHHHHHHHHHHHHHHHHHHHHHHHH!

Merp.
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