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Re: use of array_key_exists() to prevent duplicates? [message #173031 is a reply to message #173015]

Fri, 18 March 2011 10:05

Captain Paralytic
Messages: 204
Registered: September 2010

Karma:

Senior Member

On Mar 17, 5:09 pm, William Gill <nos...@domain.invalid> wrote:
> On 3/17/2011 11:58 AM, Captain Paralytic wrote:
>
>> Alternative 1) Just assign the values to an associative array with the
>> serial number as the key. At the end a foreach will produce a list of
>> unique values. No need for array_key_exists() at all.
>
> Is this any more efficient than if (array_key_exists()) ?
> On the minus side, if I edit or modify the memo, it will be overwritten
> using this alternative. I could avoid this, but it seems unnecessarily
> complicated.
Not complicated at all. My original suggestion keeps the last copy. If
they are "duplicates" then they will all be the same. If instead you
want the first copy you just add an if test as in
if(!isset($myarray[$mykey]))
$myarray[$mykey] = $myvalue;

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[Message index]

		use of array_key_exists() to prevent duplicates? By: William Gill on Thu, 17 March 2011 15:35
		Re: use of array_key_exists() to prevent duplicates? By: Captain Paralytic on Thu, 17 March 2011 15:58
		Re: use of array_key_exists() to prevent duplicates? By: William Gill on Thu, 17 March 2011 17:09
		Re: use of array_key_exists() to prevent duplicates? By: Captain Paralytic on Fri, 18 March 2011 10:05
		Re: use of array_key_exists() to prevent duplicates? By: William Gill on Fri, 18 March 2011 15:06
		Re: use of array_key_exists() to prevent duplicates? By: Captain Paralytic on Fri, 18 March 2011 16:15
		Re: use of array_key_exists() to prevent duplicates? By: William Gill on Fri, 18 March 2011 16:34
		Re: use of array_key_exists() to prevent duplicates? By: Captain Paralytic on Fri, 18 March 2011 16:46
		Re: use of array_key_exists() to prevent duplicates? By: William Gill on Fri, 18 March 2011 17:17

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