How to split string into an array into two separate strings

Question

I have the following Ruby on Rails params:

<ActionController::Parameters {"type"=>["abc, def"], "format"=>:json, "controller"=>"order", "action"=>"index"} permitted: false>

I want to check if there's a , in the string, then separate it into two strings like below and update type in params.

<ActionController::Parameters {"type"=>["abc", "def"], "format"=>:json, "controller"=>"order", "action"=>"index"} permitted: false>

I tried to do like below:

params[:type][0].split(",") #=> ["abc", " def"]

but I am not sure why there's a space before the second string.

How can I achieve that?

Just strip the array - params[:type][0].split(",").compact.collect(&:strip) — Pramod Solanky
– Pramod Solanky, Commented Nov 20, 2017 at 20:47

Sebastián Palma · Accepted Answer · 2017-11-20 20:52:48Z

1

Because there's a whitespace in your string, that's why the result of using split will also include it in the splitted element for the array.

You could remove first the whitespaces and then use split. Or add ', ' as the split value in order it takes the comma and the space after it. Or depending on the result you're trying to get, to map the resulting elements in the array and remove the whitespaces there, like:

string = 'abc, def'
p string.split ','              # ["abc", " def"]
p string.split ', '             # ["abc", "def"]
p string.delete(' ').split ','  # ["abc", "def"]
p string.split(',').map &:strip # ["abc", "def"]

edited Nov 20, 2017 at 20:52

answered Nov 20, 2017 at 20:47

Sebastián Palma

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3 Comments

brainbag Over a year ago

delete(' ') will remove all space characters from the string, not just the extra whitespace. p string.split(",").map(&:strip) would be a better option, though split(', ') is the best case scenario if it's possible to use.

mike Over a year ago

@Sebastian Palma. Thanks. I just realized what if i have 3 values e.g ["abc, def, ""], last one is a blank value. can i also separate it. i tried but it gives me ["abc", "def", "\"\""]

Sebastián Palma Over a year ago

You could use string.split(', '), string.delete(' ').split(',') or to reject the empty values in the array string.split(',').map(&:strip).reject &:empty?.

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