Exception: KeyError
Relationships & Source Files | |
Super Chains via Extension / Inclusion / Inheritance | |
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IndexError
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Defined in: | error.c, error.c |
Overview
Raised when the specified key is not found. It is a subclass of ::IndexError.
h = {"foo" => : }
h.fetch("foo") #=> :bar
h.fetch("baz") #=> KeyError: key not found: "baz"
Class Method Summary
::Exception - Inherited
.exception | With no argument, or if the argument is the same as the receiver, return the receiver. |
.new | Construct a new ::Exception object, optionally passing in a message. |
Instance Method Summary
::Exception - Inherited
#== | Equality—If obj is not an ::Exception, returns |
#backtrace | Returns any backtrace associated with the exception. |
#backtrace_locations | Returns any backtrace associated with the exception. |
#cause | Returns the previous exception ($!) at the time this exception was raised. |
#exception | With no argument, or if the argument is the same as the receiver, return the receiver. |
#inspect | Return this exception's class name and message. |
#message | Returns the result of invoking |
#set_backtrace | Sets the backtrace information associated with |
#to_s | Returns exception's message (or the name of the exception if no message is set). |
Constructor Details
This class inherits a constructor from Exception