I have a multidimentional array in ruby, like so: [[a, b, c], [d, e, f], [g, h, i]] and I want to remove spaces in every second object of each array with this function .gsub!(/\s+/, ""). So it is basically like doing: [[a, b.gsub!(/\s+/, ""), c], [d, e.gsub!(/\s+/, ""), f], [g, h.gsub!(/\s+/, ""), i]]
I am a little bit confused, how can I do that ?
arr = [[a, b, c], [d, e, f], [g, h, i]]
Inplace:
arr.each { |a| a[1].delete! ' ' }
Immutable:
arr.dup.each { |a| a[1].delete! ' ' }
Enumerable that are immutable. That fact does not make them doing the same thing as .dup.each.gsub, but about doing operations on second elements of array items. That’s why I do not bother to add a comment on “use gsub if...”. I like your solution more than mine, because it lacks this nasty access by hard-coded index.arr = [["Now is", "the time for", "all"],
["good", "people to come", "to", "the"],
["aid of", "their bowling", "team"]]
arr.map { |a,b,*c| [a, b.delete(' '), *c] }
#=> [["Now is", "thetimefor", "all"],
# ["good", "peopletocome", "to", "the"],
# ["aid of", "theirbowling", "team"]]
To mutate arr:
arr.map! { |a,b,*c| [a, b.delete(' '), *c] }
b.delete(' ') to b.gsub(/\s+/,'') if whitespace is to be removed.arr = [[a, b, c], [d, e, f], [g, h, i]]
arr.map! do |el|
el[1].gsub!(/\s+/, "")
el
end
Note: This will mutate your original array, which might be something you don't want.
