class KeyError - Ruby 2.2.4 Core API Reference API Reference

Ruby 2.2 Core API

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class KeyError

Raised when the specified key is not found. It is a subclass of IndexError.

h = {"foo" => :bar}
h.fetch("foo") #=> :bar
h.fetch("baz") #=> KeyError: key not found: "baz"

In Files

  • error.c

Parent

IndexError

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