Remove from an array

ruby-talk
1

Hello,
I have an array, let's name it items[]
I want to remove an object in a elegant way
items.remove(3) does not work
How should I do ?
Thanks

···

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Posted via http://www.ruby-forum.com/.

2

Nicolas Benady wrote:

Hello,
I have an array, let's name it items
I want to remove an object in a elegant way
items.remove(3) does not work
How should I do ?
Thanks

items.delete_at(3)

Just like in the documentation.

···

--
Paul Lutus
http://www.arachnoid.com

3

Paul Lutus wrote:

Nicolas Benady wrote:

Hello,
I have an array, let's name it items
I want to remove an object in a elegant way
items.remove(3) does not work
How should I do ?
Thanks

items.delete_at(3)

Just like in the documentation.

Did he want to remove the element at index 3,
or remove instances of 3?

Hal

4

Hal Fulton wrote:

Paul Lutus wrote:

Nicolas Benady wrote:

Hello,
I have an array, let's name it items
I want to remove an object in a elegant way
items.remove(3) does not work
How should I do ?
Thanks

items.delete_at(3)

Just like in the documentation.

Did he want to remove the element at index 3,
or remove instances of 3?

I suppose I should have asked that before replying. :slight_smile:

If your theory is correct, then:

items.delete_if { |x| x == 3 }

Removes all items matching "3".

···

--
Paul Lutus
http://www.arachnoid.com

5

Hal Fulton wrote:

> Paul Lutus wrote:
>> Nicolas Benady wrote:
>>
>>>Hello,
>>>I have an array, let's name it items
>>>I want to remove an object in a elegant way
>>>items.remove(3) does not work
>>>How should I do ?
>>>Thanks
>>>
>>
>> items.delete_at(3)
>>
>> Just like in the documentation.
>>
>
> Did he want to remove the element at index 3,
> or remove instances of 3?

I suppose I should have asked that before replying. :slight_smile:

If your theory is correct, then:

items.delete_if { |x| x == 3 }

items.delete 3

Removes all items matching "3".

as you said

Cheers
Robert

···

On 8/20/06, Paul Lutus <nospam@nosite.zzz> wrote:

--

Paul Lutus
http://www.arachnoid.com

--
Deux choses sont infinies : l'univers et la bêtise humaine ; en ce qui
concerne l'univers, je n'en ai pas acquis la certitude absolue.

- Albert Einstein

6

Jeffrey Schwab wrote:

/ ...

If your theory is correct, then:

items.delete_if { |x| x == 3 }

Removes all items matching "3".

items.delete(3)

Yes, better. I overlooked this approach.

···

--
Paul Lutus
http://www.arachnoid.com

7

This is slightly off-topic, but...

To remove only the first item matching a value of 3, do this..

items.delete_at(items.index(3))

_Kevin
www.sciwerks.com

···

On Sunday, August 20, 2006, at 7:33 PM, Robert Dober wrote:

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On 8/20/06, Paul Lutus <nospam@nosite.zzz> wrote:

Hal Fulton wrote:

> Paul Lutus wrote:
>> Nicolas Benady wrote:
>>
>>
>>>Hello,
>>>I have an array, let's name it items
>>>I want to remove an object in a elegant way
>>>items.remove(3) does not work
>>>How should I do ?
>>>Thanks
>>>
>>
>>
>> items.delete_at(3)
>>
>> Just like in the documentation.
>>
>
> Did he want to remove the element at index 3,
> or remove instances of 3?

I suppose I should have asked that before replying. :slight_smile:

If your theory is correct, then:

items.delete_if { |x| x =3D=3D 3 }

items.delete 3

Removes all items matching "3".

as you said

Cheers
Robert

--

Paul Lutus
http://www.arachnoid.com

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