Bug #14008: Adding elements to array inside 2D array duplicates across all other arrays

• Status: Rejected
• Assignee: -
• Target version: -
• ruby -v: ruby 2.3.3p222 (2016-11-21 revision 56859) [x86_64-linux]
• Backport: 2.3: UNKNOWN, 2.4: UNKNOWN

[v0dro (Sameer Deshmukh)]

Say I create a 2D array in Ruby using the Array.new syntax like this:
arr = Array.new 3, []

Adding elements to say, the 2nd array inside arr produces the following result:

arr = Array.new 3, []
arr[2] << 3
arr
# => [[3], [3], [3]]

Expected behavior

I think this should work exactly like what happens when initializing 2D arrays using the literal syntax:

arr = [[],[],[]] 
arr[2] << 3
arr
# => [[], [], [3]] 

[v0dro (Sameer Deshmukh)]

I'm so sorry I had forgotten about Array gotchas. Please close this issue.

[duerst (Martin Dürst)]

• Status changed from Open to Rejected