Re^2: Are global variables "bad"?

by Anonymous Monk

on Apr 21, 2009 at 20:34 UTC ( [id://759107]=note: print w/replies, xml )

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"Perl 1, 2, 3 and 4 didn't have lexical variables. Or name spaces. All variables where global"

Where did the local statement fit into this absolutist scheme?

Comment on Re^2: Are global variables "bad"?

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Re^3: Are global variables "bad"? by Corion (Patriarch) on Apr 21, 2009 at 20:59 UTC
local only works on global variables. It puts a temporary value into the global variable until the current block is left. Also see Seven Useful Uses for Local.	[reply]
Re^4: Are global variables "bad"? by JavaFan (Canon) on Apr 21, 2009 at 21:21 UTC
local only works on global variables. Not true. It's not even true if you meant "package" where you wrote "global". `$ perl -wE 'my @a = (1, 2, 3); {local $a[1] = 7; say "@a";} say "@a"' 1 7 3 1 2 3` [download]	[reply] [d/l]
Re^3: Are global variables "bad"? by JavaFan (Canon) on Apr 21, 2009 at 21:02 UTC
local() essentially replaces the current variable (package variable - or aggregate element) with another variable, until the runtime exits the scope the local() is in. If no magic is involved, it may be easier to think of it as temporary replacing the value.	[reply]

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