Delete one of the Same item in an array?.

[mephisto]

Well, the title says all:

I have:

Array = ['Object 1', 'Object 2', 'Object 1', 'Object 2', 'Object 3']

and when i use:

Array.delete('Object 1')

It delete all the 'Object 1' objects, and I want to delete only 1 of them.

Is there a method in the array class to do this?

Thanks :thumb:

 

[Ulqiorra]

I am not sure, but can't you just do this:

 

for i in Array

  if i == 'Object 1'

    Array.delete(i)

  end

end

 

 

[SolstICE]

think there might be one. did you try pragmatic guide?

http://www.rubycentral.com/pickaxe/builtins.html

 

[Brewmeister]

I am not sure, but can't you just do this:

 

for i in Array

  if i == 'Object 1'

    Array.delete(i)

  end

end

 

that will delete them all too.

 

for i in 0...Array.size

  if Array[i] == 'Object 1'

    Array.delete_at(i)

    break

  end

end

 

 

[Glitchfinder]

Are you trying to delete the first instance of that value in the array? Or a very specific instance of that value? If you just want to delete the first, try this:

if Array.include?('Object 1')

  i = Array.index('Object 1')

  Array.delete_at(i)

end

Edit: Brew, which is more efficient? My method or yours? I mean, It probably wouldn't make much of a difference, but I was wondering...

 

[Zeriab]

Most likely your method Glitchfinder since the methods you use are implemented in C.
Otherwise it would be Brew's version since .include? and .index both search through the array. That is, you search through the array twice where Brew only does it once.

If you really want to know you can always build up a test case and test it out. Maybe an conclusion is that the speed difference is insignificant.

*hugs*
- Zeriab