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I find myself wanting to know if the characters in one string are in another.
For example, if you have a key space for a string key name, making sure the provided key is valid.


require 'set'
def chars_subset_of? checkme, inme
checkme.split(//).to_set.subset? inme.split(//).to_set
end


You could also toss this inside class String to dynamically add the method


require 'set'
def chars_subset_of? other_string
if other_string.class == String
self.split(//).to_set.subset? other_string.split(//).to_set
else # just try
self.split(//).to_set.subset? other_string.to_set
end
end


This entry was posted on Thursday, February 11th, 2010 at 2:32 am and is filed under code or systems, migrated from old. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.