| class Method |
|
Index:
[ ] arity call to_proc
Method objects are created by
Object#method, and are associated
with a particular object (not just with a class). They may be used
to invoke the method within the object, and as a block associated with
an iterator.
class Thing |
||
def square(n) |
||
n*n |
||
end |
||
end |
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aThing = Thing.new |
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aMethod = aThing.method("square") |
||
|
||
aMethod.call(9) |
-> | 81 |
[ 1, 2, 3 ].collect(&aMethod) |
-> | [1, 4, 9] |
| instance methods | ||
| [ ] | meth[ [args]* ] -> anObject |
Synonym for Method.call.
|
| arity | meth.arity -> aFixnum | Returns an indication of the number of arguments accepted by a method. Returns a nonnegative integer for methods that take a fixed number of arguments. For Ruby methods that take a variable number of arguments, returns -n-1, where n is the number of required arguments. For methods written in C, returns -1 if the call takes a variable number of arguments. |
| call | meth.call( [args]* ) -> anObject |
Invokes the meth with the specified
arguments, returning the method's return value.
|
| to_proc | meth.to_proc -> aProc |
Returns a Proc object corresponding to this method.
|
Extracted from the book "Programming Ruby - The Pragmatic Programmer's Guide"
Copyright © 2000 Addison Wesley Longman, Inc. Released under the terms of the Open Publication License V1.0.
This reference is available for download.