Module: SimpleHash

Defined in:

lib/simple_hash.rb,
lib/simple_hash/version.rb

Constant Summary

VERSION =

'0.0.2'

Class Method Summary

• .h(&list_block) ⇒ Hash

  Make a hash from an array of symbols wrapped in a block Suppose you have variables.

• .short_cut! ⇒ Object

  Adds #h method globally, delegating to SimpleHash::h.

Class Method Details

.h(&list_block) ⇒ Hash

Make a hash from an array of symbols wrapped in a block Suppose you have variables

year = 2016
month = 3
day = 30
hour = 18
minute = 50
second = 23

Bulid the hash like this

SimpleHash.h{[:year, :month, :day, :hour, :minute, :second]}

This method gets the keys by yieling the block passed in and look up the variable values thourgh the block’s binding

Parameters:

• block (&list_block) —

  with an array of keys, e.g. :key2, …]

Returns:

• (Hash) —

  hash with passed-in keys, e.g. ‘key1_value’, key2: ‘key2_value’, …

# File 'lib/simple_hash.rb', line 23

def h(&list_block)
  variables = yield.map(&:to_s)
  Hash.[](variables.map do |variable|
            [variable.to_sym, list_block.binding.local_variable_get(variable)]
          end)
end

.short_cut! ⇒ Object

Adds #h method globally, delegating to SimpleHash::h

# File 'lib/simple_hash.rb', line 31

def self.short_cut!
  TOPLEVEL_BINDING.eval 'include SimpleHash'
end