If I start with two arrays such as:
array1 = [{"ID":"1","name":"Dog"}]
array2 = [{"ID":"2","name":"Cat"}]
How to merge this array into one array like this?
arraymerge = [{"ID":"1","name":"Dog"}, {"ID":"2","name":"Cat"}]
4 Answers
array1 = [{ID:"1",name:"Dog"}]
array2 = [{ID:"2",name:"Cat"}]
p array1 + array2
# => [{:ID=>"1", :name=>"Dog"}, {:ID=>"2", :name=>"Cat"}]
Or maybe this is superfluous:
array1 = [{ID:"1",name:"Dog"}]
array2 = [{ID:"2",name:"Cat"}]
array3 = [{ID:"3",name:"Duck"}]
p [array1, array2, array3].map(&:first)
# => [{:ID=>"1", :name=>"Dog"}, {:ID=>"2", :name=>"Cat"}, {:ID=>"3", :name=>"Duck"}]
2 Comments
Tije Kusnadi
can we remove ":" ?
Sebastián Palma
No @TijeKusnadi, that wouldn't work, that's they way to call
to_proc on the object, is equivalent to write .map{|e| e.first}, you can choose what to use.Other answer for your question is to use Array#concat:
array1 = [{"ID":"1","name":"Dog"}]
array2 = [{"ID":"2","name":"Cat"}]
array1.concat(array2)
# [{"ID":"1","name":"Dog"}, {"ID":"2","name":"Cat"}]
Comments
Just add them together:
puts array1+array2
{:ID=>"1", :name=>"Dog"}
{:ID=>"2", :name=>"Cat"}
Or:
p array1+array2
[{:ID=>"1", :name=>"Dog"}, {:ID=>"2", :name=>"Cat"}]
See also: Merge arrays in Ruby/Rails
3 Comments
Tije Kusnadi
arraymerge = [{"ID":"1","name":"Dog"}, {"ID":"2","name":"Cat"}]
Tije Kusnadi
i want the array symbol still there , how do i do that?
Kathryn
It's still an array.
puts prints it a little differently than p does.You can just use + operator to do that
array1 = [{"ID":"1","name":"Dog"}]
array2 = [{"ID":"2","name":"Cat"}]
arraymerge = array1 + array2
#=> [{:ID=>"1", :name=>"Dog"}, {:ID=>"2", :name=>"Cat"}]
array1 + array2 #=> [{:ID=>"1", :name=>"Dog"}, {:ID=>"2", :name=>"Cat"}]