Sorry, but that code below is really unidiomatic ruby.
Given the following:
>> given a data structure like @contacts =
>> [{:first_name=>'tim', :last_name=>'rand', :id =
>> 1},{:first_name=>'jim', :last_name=>'band', :id =>
>> 2},{:first_name=>'him', :last_name=>'crand', :id => 3}]
>> and given a query may be first, last, or both names
>> return id number for matches
>
@contacts = [{:first_name=>'tim', :last_name=>'rand', :id => 1},
{:first_name=>'jim', :last_name=>'band', :id =>2},
{:first_name=>'him', :last_name=>'crand', :id => 3}]
keywords = "ran"
@contacts.select{|hash| keywords.split.any?{|keyword|
hash.values.join.include?(keyword)}}.map{|hash| hash[:id]}
# or more prettily:
@contacts.select do |hash|
keywords.split.any? do |keyword|
hash.values.join.include?(keyword)
end
end. # note the period at the end of this line... indicating we still
want to send the result of this select method another message yet...
(ie the map message below).
map do |hash|
hash[:id]
end
=> [1, 3]
if you really need to make a method of it (tho I don't know why you
would), you can do so thusly:
class ArrayOfHashes < Array
def search_array_with_hashes(keywords)
found_hashes = self.select{|hash| keywords.split.any?{|keyword|
hash.values.join.include?(keyword)}}
found_hashes.map{|hash| hash[:id]}
end
end
@contacts = ArrayOfHashes.new(@contacts)
@contacts.search_array_with_hashes("ran")
=> [1, 3]
@contacts.search_array_with_hashes("band")
=> [2]
@contacts.search_array_with_hashes("tim rand")
=> [1, 3]
@contacts.search_array_with_hashes("crand")
=> [3]
@contacts.search_array_with_hashes("jam")
=> []
>> p search_array_with_hashes(parse_query("band"))
>> p search_array_with_hashes(parse_query("tim rand"))
>> p search_array_with_hashes(parse_query("crand"))
>
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On 26/05/2009, at 7:07 PM, Robert Scott wrote:
>
> Tim,
>
> Thanks again for the detailed thoughts. It looks like your approach is
> structured in a way that should handle what I'm looking for, and
> provide
> a framework for future expansion. I went ahead and implemented it in,
> and am trying to resolve an issue now (NoMethodError (undefined method
> `values_at') for `search_array_with_hashes' but I'll let you know once
> it gets working.
>
> Cheers!
>
>
>
> timr wrote:
>> Hi again Robert,
>> There might be methods build into rails for doing this, but when you
>> have a very specific case, you might just roll out your own methods
>> to
>> get exactly what you want:
>>
>> =begin
>> given a data structure like @contacts =
>> [{:first_name=>'tim', :last_name=>'rand', :id =
>> 1},{:first_name=>'jim', :last_name=>'band', :id =>
>> 2},{:first_name=>'him', :last_name=>'crand', :id => 3}]
>> and given a query may be first, last, or both names
>> return id number for matches
>> =end
>>
>> #here is our search array
>> @contacts = [{:first_name=>'tim', :last_name=>'rand', :id =>
>> 1},{:first_name=>'jim', :last_name=>'band', :id =>
>> 2},{:first_name=>'him', :last_name=>'crand', :id => 3},
>> {:first_name=>'shim', :last_name=>'crand', :id => 4}]
>>
>> #method to separate names if more than one is given
>> def parse_query(query)
>> if query.match(" ")
>> name1, name2 = query.split(/ /)
>> else
>> name1 = query
>> return name1.to_a
>> end
>> return [name1, name2]
>> end
>>
>> #find any name in hash field and return the ids
>> def search_array_with_hashes(array_with_name_or_names)
>> @hits = []
>> #search first names
>> array_with_name_or_names.each do |name|
>> @contacts.each do |hash|
>> @hits << hash[:id] if hash.values.include?(name)
>> end
>> end
>> @hits.uniq
>> end
>>
>> #usage/test case examples
>> p search_array_with_hashes(parse_query("band"))
>> p search_array_with_hashes(parse_query("tim rand"))
>> p search_array_with_hashes(parse_query("crand"))
>> # >> [2]
>> # >> [1]
>> # >> [3, 4]
>>
>> Will that do the trick?
>> Tim
>>
>> On May 25, 1:23�am, Robert Scott <[email protected]>
>
> --
> Posted via http://www.ruby-forum.com/.
>
> >
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