Remove Hash from array based on key in Ruby

Question

I'm new to Ruby. This is my array containing multiple hash. Now, I want to remove all Hash whose ':total_duration' is 0. This is what I've tried, but nothing is happening.

@array = 
[{:tid=>"p121709", :uid=>"S2G1", :total_duration=>0},
{:tid=>"p121710", :uid=>"S2G1", :total_duration=>0},
{:tid=>"m121459", :uid=>"S2G1", :total_duration=>713}]

@op_arr.delete_if { |key, total_duration| [key].include? 0 }

The output should be

@array = [{:tid=>"m121459", :uid=>"S2G1", :total_duration=>713}]

Shouldn't the output be [{:tid=>"m121459", :uid=>"S2G1", :total_duration=>713}] — Alok Swain
– Alok Swain, Commented Nov 25, 2019 at 13:09

Alok Swain · Accepted Answer · 2019-11-25 13:04:31Z

4

@array = [{:tid=>"p121709", :uid=>"S2G1", :total_duration=>0},
{:tid=>"p121710", :uid=>"S2G1", :total_duration=>0},
{:tid=>"m121459", :uid=>"S2G1", :total_duration=>713}]

@array.reject!{|e| e[:total_duration].zero?}

P.S - I think the output you need is [{:tid=>"m121459", :uid=>"S2G1", :total_duration=>713}] @array has one element which is a Hash and not what is posted in the question i.e. [{{:tid=>"m121459", :uid=>"S2G1", :total_duration=>713}}]

answered Nov 25, 2019 at 13:04

Alok Swain

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Comments

mrzasa · Accepted Answer · 2019-11-25 13:04:04Z

3

Elements of the array are hashes, so you need to treat them as hashes:

@array.delete_if{|h| h[:total_duration] == 0}
# => [{:tid=>"m121459", :uid=>"S2G1", :total_duration=>713}]
@array
#=> [{:tid=>"m121459", :uid=>"S2G1", :total_duration=>713}]

answered Nov 25, 2019 at 13:04

mrzasa

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Comments

Amol Mohite · Accepted Answer · 2019-11-25 13:20:09Z

1

Try this

@array = [
    {:tid=>"p121709", :uid=>"S2G1", :total_duration=>0},
    {:tid=>"p121710", :uid=>"S2G1", :total_duration=>0},
    {:tid=>"m121459", :uid=>"S2G1", :total_duration=>713}]

    @array.delete_if{|e| e[:total_duration]== 0}
    # => [{:tid=>"m121459", :uid=>"S2G1", :total_duration=>713}]

Hope this will help for you.

answered Nov 25, 2019 at 13:20

Amol Mohite

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1 Comment

Cary Swoveland Over a year ago

To date appear to have four identical answers. The first two were given within seconds of each other, so I can't object to having both. Having more, such as yours, given 16 minutes after the first, serve no purpose. That is the reason for my downvote.

Alok Swain · Accepted Answer · 2019-11-25 15:02:32Z

1

@array.delete_if{|x| x[:total_duration] == 0}

this will solve your problem

edited Nov 25, 2019 at 15:02

Alok Swain

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answered Nov 25, 2019 at 13:07

Safwan S M

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1 Comment

Cary Swoveland Over a year ago

To date appear to have four identical answers. The first two were given within seconds of each other, so I can't object to having both. Having more, given minutes later, such as yours, serve no purpose. You may not have not noticed the others before posting but that is no matter. That is the reason for my downvote.

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