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PATH: opt / alt / ruby18 / share / ri / 1.8 / system / Hash

--- !ruby/object:RI::MethodDescription 
aliases: []

block_params: 
comment: 
- !ruby/struct:SM::Flow::P 
  body: "Returns a value from the hash for the given key. If the key can't be found, there are several options: With no other arguments, it will raise an <tt>IndexError</tt> exception; if <em>default</em> is given, then that will be returned; if the optional code block is specified, then that will be run and its result returned."
- !ruby/struct:SM::Flow::VERB 
  body: "   h = { &quot;a&quot; =&gt; 100, &quot;b&quot; =&gt; 200 }\n   h.fetch(&quot;a&quot;)                            #=&gt; 100\n   h.fetch(&quot;z&quot;, &quot;go fish&quot;)                 #=&gt; &quot;go fish&quot;\n   h.fetch(&quot;z&quot;) { |el| &quot;go fish, #{el}&quot;}   #=&gt; &quot;go fish, z&quot;\n"
- !ruby/struct:SM::Flow::P 
  body: The following example shows that an exception is raised if the key is not found and a default value is not supplied.
- !ruby/struct:SM::Flow::VERB 
  body: "   h = { &quot;a&quot; =&gt; 100, &quot;b&quot; =&gt; 200 }\n   h.fetch(&quot;z&quot;)\n"
- !ruby/struct:SM::Flow::P 
  body: <em>produces:</em>
- !ruby/struct:SM::Flow::VERB 
  body: "   prog.rb:2:in `fetch': key not found (IndexError)\n    from prog.rb:2\n"
full_name: Hash#fetch
is_singleton: false
name: fetch
params: |
  hsh.fetch(key [, default] )       => obj
  hsh.fetch(key) {| key | block }   => obj

visibility: public

[-] reject-i.yaml [edit]
[-] size-i.yaml [edit]
[-] pretty_print_cycle-i.yaml [edit]
[-] fetch-i.yaml [edit]
[-] indices-i.yaml [edit]
[-] rehash-i.yaml [edit]
[-] empty%3f-i.yaml [edit]
[-] to_yaml-i.yaml [edit]
[-] values_at-i.yaml [edit]
[-] hash-i.yaml [edit]
[-] invert-i.yaml [edit]
[-] pretty_print-i.yaml [edit]
[-] yaml_initialize-i.yaml [edit]
[-] %5b%5d%3d-i.yaml [edit]
[-] key%3f-i.yaml [edit]
[-] index-i.yaml [edit]
[-] values-i.yaml [edit]
[-] default-i.yaml [edit]
[-] include%3f-i.yaml [edit]
[-] each_key-i.yaml [edit]
[-] merge-i.yaml [edit]
[-] initialize_copy-i.yaml [edit]
[-] each_pair-i.yaml [edit]
[-] member%3f-i.yaml [edit]
[-] inspect-i.yaml [edit]
[-] delete-i.yaml [edit]
[-] update-i.yaml [edit]
[-] cdesc-Hash.yaml [edit]
[-] clear-i.yaml [edit]
[-] reject%21-i.yaml [edit]
[-] store-i.yaml [edit]
[-] keys-i.yaml [edit]
[-] %3d%3d-i.yaml [edit]
[-] to_hash-i.yaml [edit]
[-] %5b%5d-c.yaml [edit]
[-] %5b%5d-i.yaml [edit]
[-] to_a-i.yaml [edit]
[-] eql%3f-i.yaml [edit]
[-] default%3d-i.yaml [edit]
[-] length-i.yaml [edit]
[+] ..
[-] merge%21-i.yaml [edit]
[-] has_key%3f-i.yaml [edit]
[-] each_value-i.yaml [edit]
[-] delete_if-i.yaml [edit]
[-] select-i.yaml [edit]
[-] default_proc-i.yaml [edit]
[-] each-i.yaml [edit]
[-] indexes-i.yaml [edit]
[-] sort-i.yaml [edit]
[-] new-c.yaml [edit]
[-] has_value%3f-i.yaml [edit]
[-] shift-i.yaml [edit]
[-] value%3f-i.yaml [edit]
[-] to_s-i.yaml [edit]
[-] replace-i.yaml [edit]