Monday, January 21, 2013
I tend to use a method like:
module Enumerable
# Returns a Hash keyed by the value of the block to the number times that
# value was returned. If you have experience with the #group_by from
# ActiveSupport, this would be like .group_by(&block).map{|k,a|[k,a.size]}
# (except it is a Hash rather than an Array).
def count_by
counts = Hash.new(0)
each {|e| counts[block_given? ? yield(e) : e] += 1}
counts
end
end
$ irb -r ./enumerable
irb1.9.3> a=[ 'casual','sick','casual','sick','casual','sick','casual','sick' ]
#1.9.3 => ["casual", "sick", "casual", "sick", "casual", "sick", "casual", "sick"]
irb1.9.3> a.count_by
#1.9.3 => {"casual"=>4, "sick"=>4}
This keeps you from iterating over the source multiple times, too.
-Rob
On Jan 21, 2013, at 1:37 AM, Ashokkumar Yuvarajan wrote:
thanks :)On Mon, Jan 21, 2013 at 12:03 PM, Maddy <ashokkumar@shriramits.com> wrote:On Mon, Jan 21, 2013 at 12:06 PM, bala kishore pulicherla <balumca21@gmail.com> wrote:
a.count("casual")
Hi Everyone,Good Day,a=[ 'casual','sick','casual','sick','casual','sick','casual','sick' ]I need to collect casual's count and sick's count like,Caual :4Sick :4Thank you,
--"Attitude is a little thing that makes a big difference"Thanks & Regards
Ashokkumar.YShriramits
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