Created
November 28, 2015 17:11
-
-
Save devsigner/7e83d7a31f206a5a50c9 to your computer and use it in GitHub Desktop.
Ruby Hash with Range key
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
# Hash with range keys | |
#--------------------- | |
# ex: | |
# h = range_hash({}) | |
# h[1..3] = 'v1' | |
# h[8..12] = 'v2' | |
#=> { 1..3 => 'v1', 8..12 => 'v2' } | |
# | |
# h[2..5] #=> 'v1' | |
# h[4..6] #=> nil | |
# h[5] #=> 'v2' | |
# | |
def range_hash hash | |
@ranges = Hash.new { |this_hash,missing_key| | |
found_key = this_hash.keys.find { |this_key| | |
this_key.is_a?(Range) && | |
( | |
( missing_key.is_a?(Integer) && (this_key.include?(missing_key)) ) || | |
( missing_key.class == Range && (missing_key.to_a & this_key.to_a).present? ) | |
) | |
} | |
found_key ? this_hash[found_key] : nil | |
}.merge(hash) | |
end |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment