Class: Hash

Inherits:

Object

• Object
• Hash

Defined in:

lib/amp/server/fancy_http_server.rb,
lib/amp/support/support.rb

Direct Known Subclasses

Amp::ManifestEntry, PoorPriorityQueue, PythonConfig::ConfigSection, Zip::ZipExtraField

Class Method Summary

• .with_keys(iterable, value = true) ⇒ Hash

  Given a list of key names, and a specified value, we create a hash with those keys all equal to value.

Instance Method Summary

• #[](key) ⇒ Hash, Value

  Same as #[], but will take regexps and try to match those.

• #get ⇒ Object
• #pick(*keys) ⇒ Object

  Create a subset of self with keys keys.

Class Method Details

.with_keys(iterable, value = true) ⇒ Hash

Given a list of key names, and a specified value, we create a hash with those keys all equal to value. Useful for making true/false tables with speedy lookup.

Parameters:

• iterable (Enumerable) —

  any object with Enumerable mixed in can create a hash.

• value (Object) (defaults to: true) —

  (true) the value to assign each key to in the resultant hash

Returns:

• (Hash) —

  a hash with keys from iterable, all set to value

# File 'lib/amp/support/support.rb', line 548

def self.with_keys(iterable, value=true)
  iterable.inject({}) {|h, k| h.merge!(k => value) }
end

Instance Method Details

#[](key) ⇒ Hash, Value

Same as #[], but will take regexps and try to match those. This will bug out if you are using regexps as keys

Returns:

• (Hash, Value) —

  will return either a hash (if supplied with a regexp) or whatever it would normally return.

# File 'lib/amp/server/fancy_http_server.rb', line 13

def [](key)
  case key
  when Regexp
    select {|k, _| k =~ key }.to_hash
  else
    get key
  end
end

#get ⇒ Object

# File 'lib/amp/server/fancy_http_server.rb', line 6

alias_method :get, :[]

#pick(*keys) ⇒ Object

Create a subset of self with keys keys.

# File 'lib/amp/support/support.rb', line 554

def pick(*keys)
  keys.inject({}) {|h, (k, v)| h[k] = v }
end