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@fitzgen
Created June 10, 2010 19:01
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> (function (arg) { return arg === undefined; }()) // Missing arguments are undefined
true
> var items = []
undefined
> items.push() // Pushing implicitly undefined item doesn't work
0
> items
[]
> items.push(undefined) // What about explicitly pushing undefined?
1
> items // wtf
[undefined]
> (function (arg) { return arguments.length; }()) // Ahh, but now it makes sense, still WTF
0
> (function (arg) { return arguments.length; }(undefined))
1
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