Hi Folks,
In this small tutorial, I am writing a program that updates value of each element in hash with a given array values.
Given that:
h = { h1: 'value1', h2: 'value2', h3: 'value3', h4: 'value4' }
a = [ '1', '2', '3', '4' ]
Where h is a Hash and a is an Array
Output we would like to achieve here is:
h = { h1: 'value1_1', h2: 'value2_2', h3: 'value3_3', h4: 'value4_4' }
Let’s code it:
h = { h1: 'value1', h2: 'value2', h3: 'value3', h4: 'value4' }
a = [ '1', '2', '3', '4' ]
h.each_with_index do |(k, v), i|
break if a.size > h.keys.size
a.each_with_index { |val, index|
if i == index
h[k] = v.to_s + ‘_’ + val.to_s
end
}
end
p h.inspect
# Output => h = { :h1 => “value1_1”, :h2 => “value2_2”, :h3 => “value3_3”, :h4 => “value4_4” }
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
| class MyLittleProgram | |
| def execute | |
| h = { h1: 'value1', h2: 'value2', h3: 'value3', h4: 'value4' } | |
| a = [ '1', '2', '3', '4' ] | |
| h.each_with_index do |(k, v), i| | |
| break if a.size > h.keys.size | |
| a.each_with_index { |val, index| | |
| if i == index | |
| h[k] = v.to_s + '_' + val.to_s | |
| end | |
| } | |
| end | |
| end | |
| end | |
| e = MyLittleProgram.new | |
| p e.execute | |
| # Output => h = { :h1 => "value1_1", :h2 => "value2_2", :h3 => "value3_3", :h4 => "value4_4" } |
I’ve tried to minimize the number of loops here. Appreciate your feedback and suggestions.
Happy Coding! 🙂
Puneet Pandey's Weblog 
Small and concise:
h = { h1: ‘value1’, h2: ‘value2’, h3: ‘value3’, h4: ‘value4’ }
a = [ ‘1’, ‘2’, ‘3’, ‘4’ ]
h.each_with_index do |(k, v), i|
break if a.size > h.keys.size
a.each_with_index {|val, index| h[k] = “#{v}_#{val}” if i == index }
end
puts h