Delete a hash from array of hashes in rails

Question

I have array of hashes in json format, and I have to remove one of the hash from that array, I am iterating that array and if that particular key/ value matches i am deleting that hash, I found clear() method but, clear leaves the {}, which I don't require I want the whole hash to be removed

[{"question":"0a2a3452","answer":"lopq"},
 {"question":"58deacf9","answer":"admirationo"},
 {"question":"32c53e","answer":"acion"},
 {"question":"b5546bcf","answer":"figure"},
 {"question":"4f246a10","answer":"zelta"},
 {"question":"bf546c04","answer":"deltaa"}]

i.e if my key matches as "0a2a3452", I want to delete the first hash

Hamdi Bayhan · Answer 1 · 2018-02-16T06:42:28.477

2

You can do with delete_if method:

arr = [{"question":"0a2a3452","answer":"lopq"},
       {"question":"58deacf9","answer":"admirationo"},
       {"question":"32c53e","answer":"acion"},
       {"question":"b5546bcf","answer":"figure"},
       {"question":"4f246a10","answer":"zelta"},
       {"question":"bf546c04","answer":"deltaa"}]

arr.delete_if {|a| a[:question] == '0a2a3452' }

edited Feb 16 '18 at 06:42

answered Feb 16 '18 at 06:36

Hamdi Bayhan

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Tallboy · Answer 2 · 2018-02-16T15:54:29.143

1

Try this:

items = [
  {"question":"0a2a3452","answer":"lopq"},
  {"question":"58deacf9","answer":"admirationo"},
  {"question":"32c53e","answer":"acion"},
  {"question":"b5546bcf","answer":"figure"},
  {"question":"4f246a10","answer":"zelta"},
  {"question":"bf546c04","answer":"deltaa"}
]

items = items.reject {|i| i[:question] == '0a2a3452'}

edited Feb 16 '18 at 15:54

answered Feb 16 '18 at 06:36

Tallboy

12,847
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I think you want `reject!`, since `reject` returns a copy of the hash value. – l'L'l Feb 16 '18 at 06:56

Delete a hash from array of hashes in rails

2 Answers2