path: root/doc/syntax
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authordrbrain <drbrain@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2013-01-19 00:27:45 +0000
committerdrbrain <drbrain@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2013-01-19 00:27:45 +0000
commit1ecaf599ff22d6102dde5b76699d78ec13758d88 (patch)
tree177163e842e01754d3cfe22c6e793d9de22a2e72 /doc/syntax
parent6ff1653cf6dc03d9ca5698c2247c8bb50e8bfd95 (diff)
* 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. git-svn-id: svn+ssh:// b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'doc/syntax')
1 files changed, 11 insertions, 1 deletions
diff --git a/doc/syntax/assignment.rdoc b/doc/syntax/assignment.rdoc
index 830ba39..c371593 100644
--- a/doc/syntax/assignment.rdoc
+++ b/doc/syntax/assignment.rdoc
@@ -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
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
42 # pretend this takes a long time