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Listing of standard methods
More Classes and Objects example from a Well House Consultants training course
More on More Classes and Objects [link]
Source code: stanley Module: R108
# List of standard methods, and some examples of their use.
class Thing end widget = Thing.new can_do = widget.methods for explain in can_do p explain end # Some testing examples widget.display print "\n" puts widget.inspect p widget.to_a __END__ Sample outputs from that end section #<Thing:0x10b13e140> #<Thing:0x10b13e140> stanley:18: warning: default `to_a' will be obsolete [#<Thing:0x10b13e140>] Standard methods - In Alphabetic order: "==" - equality / same value "===" - equality test for case "=~" - looks like (regular expression) "__id__" - give me a unique object no. "__send__" "class" - what type of object is this? (Yuk!) "clone" - duplicate object contents (shallow copy?) "display" - same as to_s but NOT overridden when you override to_s "dup" - ?? Deep copy "enum_for" "eql?" - test for identical object "equal?" - test for one and the same object "extend" "freeze" - makes it read-only from now on (prevents modification) "frozen?" - Checks if proven "hash" "id" "inspect" - like "p" but returns string, doesn't output it "instance_eval" "instance_exec" "instance_of?" - check object type (give class name) "instance_variable_defined?" "instance_variable_get" "instance_variable_set" "instance_variables" "is_a?" - check object type (unlike class uses inheritance) Often better that "class" or "instance_of?" "kind_of?" - same as is_a? "method" - returns a method object "methods" - Array of methods "nil?" - does it point to the nil (false) object? "object_id" "private_methods" - selectively lists only private methods "protected_methods" "public_methods" "respond_to?" - check whether a method is there somewhere in the inheritance tree "send" - call a method named as parameter thing.send(:setage,25) is equivalent to thing.setage(25) "singleton_methods" - listing extra methods that apply to this object only "taint" - mark as "dirty" (so can't be used to open file, for example) "tainted?" - is it dirty? "tap" - new in Ruby 1.9; act on object in block but also return object avoids breaking a pipeline "to_a" - to array [default is deprecated] "to_enum" "to_s" - to string (for printing) "type" "untaint" - mark it clean! Learn about this subject
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