From: Josselin <josselin@...>
Date: 2007-06-04T00:50:24+09:00
Subject: Re: delete in Array (if exist) and count

On 2007-06-03 16:57:43 +0200, "Todd Benson" <caduceass@gmail.com> said:

> On 6/3/07, Josselin <josselin@wanadoo.fr> wrote:
>> I am trying to delete an element from an array if it exists and count
>> the number of item afterwards
>> 
>> I wrote
>> 
>> anArray = [1,2,3,4,5,6,7,8,9]
>> anArray.size
>> => 9
>> anArray.map {|e| e if e != 4}.compact
>> => [1, 2, 3, 5, 6, 7, 8, 9]
>>  anArray.map {|e| e if e != 4}.compact.size
>> => 8
>> 
>> 
>> is ther a better way to do it... it it's enough ? (learning always how
>> to write better code..)
> 
> Array#delete works also with no need for a block (i.e. you're only
> checking for equality)
> 
> anArray = [1,2,3,4,5,6]
> p anArray.delete(4)
> p anArray.size

I checked
anArray.delete(0)
=> nil
then
anArray.delete(0).size
NoMethodError: undefined method `size' for nil:NilClass

as I tried to write it in one line....

thanks

joss