Variables

Hashes in Ruby

Used to store values using a dictionary (key value pair) system.


Syntax
hash_table = { 'hash_key' => value }

#add new hash key
hash_table['hash_key2'] = value2

#retrieving a value from a key
hash_table['hash_key']

#using a symbol as a key
hash_table = { symbol: value }

Notes

Hash tables are mixed type, similar to arrays.


Example
days_of_week = {'Monday' => 'mon', tuesday: 'tues'}

days_of_week['Wednesday'] = 'wed'
>> days_of_week['Monday']
=> 'mon'
>> days_of_week[:tuesday]
=> 'tues'

See Also
Related

Symbol
Hashes

Documentation

Class: Hash - Ruby Docs

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