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"}]
Asked
Active
Viewed 7,898 times
4
Kathryn
- 1,557
- 8
- 12
Tije Kusnadi
- 43
- 1
- 4
-
1`array1 + array2 #=> [{:ID=>"1", :name=>"Dog"}, {:ID=>"2", :name=>"Cat"}]` – Sagar Pandya Jun 15 '17 at 00:26
4 Answers
10
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"}]
Sebastián Palma
- 32,692
- 6
- 40
- 59
-
-
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. – Sebastián Palma Jun 15 '17 at 01:42
5
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"}]
Sebastián Palma
- 32,692
- 6
- 40
- 59
HardSystem
- 99
- 9
3
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
Sebastián Palma
- 32,692
- 6
- 40
- 59
Kathryn
- 1,557
- 8
- 12
-
-
-
It's still an array. `puts` prints it a little differently than `p` does. – Kathryn Jun 15 '17 at 00:39
0
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"}]
Sebastián Palma
- 32,692
- 6
- 40
- 59
sa77
- 3,563
- 3
- 24
- 37