Select from array with given substring value [duplicate]

Question

I have an array which looks like this:

arr = ["value1", "value2 spot", "value3", "value4", "value5 spot", "value6"]

and I would like to select and return an array with all values which have the spot substring.

arr.select{|v| v == regex_here}

how would I be able to do this?

a, b = arr.partition {|s| s[/spot/]} then a returns true values, b returns false values. — Sagar Pandya
– Sagar Pandya, Commented Nov 28, 2016 at 13:36

Ursus · Accepted Answer · 2016-11-28 11:01:50Z

3

You could use grep method

 arr.grep(/spot/)
  => ["value2 spot", "value5 spot"]

Other request you made

arr.group_by { |item| item.match(/spot/) != nil }
 => {false=>["value1", "value3", "value4", "value6"], true=>["value2 spot", "value5 spot"]}

answered Nov 28, 2016 at 10:53

Ursus

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3 Comments

thanks, this works great! Can you also assist to get all values which don't have the substring spot seperately.

I updated my answer

Try partition too.

Vishal G · Accepted Answer · 2016-11-28 12:12:29Z

0

You can use

arr.select{ |i| i[/spot/] }
 => ["value2 spot", "value5 spot"]

answered Nov 28, 2016 at 10:54

Vishal G

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“should” is a wrong word here—the most proper solution would be to use grep.

@mudasobwa Okay cool