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* doc/syntax/assignment.rdoc (Local Variables and Methods): Made it

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more clear that local variables are created by the parser, not
	  execution.  Thanks to John Hawthorn.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38881 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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drbrain 2013-01-19 00:27:45 +00:00
parent 6ff1653cf6
commit 1ecaf599ff
2 changed files with 17 additions and 1 deletions
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@ -1,3 +1,9 @@
Sat Jan 19 09:27:31 2013 Eric Hodel <drbrain@segment7.net>
* doc/syntax/assignment.rdoc (Local Variables and Methods): Made it
more clear that local variables are created by the parser, not
execution. Thanks to John Hawthorn.
Sat Jan 19 09:15:58 2013 Eric Hodel <drbrain@segment7.net> Sat Jan 19 09:15:58 2013 Eric Hodel <drbrain@segment7.net>
* doc/syntax/assignment.rdoc: Improved links * doc/syntax/assignment.rdoc: Improved links

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doc/syntax/assignment.rdoc
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@ -70,7 +70,17 @@ have not assigned to one of these ambiguous names ruby will assume you wish to
call a method. Once you have assigned to the name ruby will assume you wish call a method. Once you have assigned to the name ruby will assume you wish
to reference a local variable. to reference a local variable.
This leads to some potentially confusing code, for example: The local variable is created when the parser encounters the assignment, not
when the assignment occurs:
a = 0 if false # does not assign to a
p local_variables # prints [:a]
p a # prints nil
The similarity between method and local variable names can lead to confusing
code, for example:
def big_calculation def big_calculation
42 # pretend this takes a long time 42 # pretend this takes a long time