How to get array element in Rails 3

Question

I have a array like this [["SWD", "150325006"], ["GOODS", "150325006"]] in rails 3.I want to get those numbers whose type is "SWD".Please check my code below.

payment_controller.rb

class PaymentsController < ApplicationController

    def payment
        @payment=Vendor.new
        respond_to do |format|
            format.html 
            format.js
        end

    end
    def check_type  
        if params[:commit]=="submit"
            @vendor_type = PaymentVendor.where(:v_name => params[:v_name]).map{|v|[v.v_catagory ,v.Receipt_No]}
            #@vendor_type = PaymentVendor.where(:v_name => params[:v_name]).pluck(:v_catagory)


        else
            @v_name=Vendor.where(:s_catagory => params[:payment][:s_catagory] ).pluck(:v_name)
        end
    end
end

@vendor_type is giving the value like this [["SWD", "150325006"], ["GOODS", "150325006"]]. Please help me.

spickermann · Accepted Answer · 2015-04-28 11:00:53Z

5

You can use assoc:

array = [["SWD", "150325006"], ["GOODS", "150325006"]]

array.assoc('SWD').last    
#=> "150325006"

answered Apr 28, 2015 at 11:00

spickermann

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2 Comments

satya Over a year ago

@ spickermaan : after adding your line it is throwing error as "undefined methos last for nil class".

spickermann Over a year ago

Did you change array to the name your variable has (probably @vendor_type)?

rick · Accepted Answer · 2015-04-28 10:53:22Z

0

@vendor_type = [["SWD", "150325006"], ["GOODS", "150325006"],["GOODS", "150325006sdfs"],["SWD", "150325006sdff"]]

output = []
@vendor_type.each do |i|
   if i.first == "SWD"
      output << i[1]
   end
end
puts output

answered Apr 28, 2015 at 10:53

rick

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Comments

Aleksei Matiushkin · Accepted Answer · 2015-04-28 10:53:00Z

0

▶ arr = [["SWD", "150325006"], ["GOODS", "150325006"]]
#⇒ [["SWD", "150325006"], ["GOODS", "150325006"]]
▶ arr.select { |e| e.first == 'SWD' }.map(&:last)
#⇒ ["150325006"]

answered Apr 28, 2015 at 10:53

Aleksei Matiushkin

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2 Comments

satya Over a year ago

@ mudasobwa : Your line is giving output as ["SWD","GOODS"] but i need only those numbers whose type is "SWD".

Aleksei Matiushkin Over a year ago

I have no clue what are you talking about. The code above returns exactly what expected.

Gagan Gami · Accepted Answer · 2015-04-28 10:54:04Z

0

Try this:

> array = [["SWD", "150325006"], ["GOODS", "150325006"]]
 => [["SWD", "150325006"], ["GOODS", "150325006"]] 
> array.select{|e| e[0] == "SWD" }.map(&:last)
 => ["150325006"]

answered Apr 28, 2015 at 10:54

Gagan Gami

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