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Using += assignment recursively on an array w/o notice [message #179437]

Sun, 28 October 2012 17:21

Scott Johnson
Messages: 196
Registered: January 2012

Karma:

Senior Member

Hello

I am pulling data from a DB that represent products and product options.

<ProductName>
<Color>
<Size>
<Qty>

The same Product name will represent several rows of color/size
combinations with a qty amount.

What I would like to be able to do is walk thru the returned data set
returned and aggregate the qty from all the rows into a an array for
later processing.

what I tried was this:

$item = array();
foreach($products as $data) {
$item[$data['ProductName']]['TotalQty'] += $data['Qty'];
$item[$data['ProductName']]['data'] = $data;
}

Now this does work and gives me the exact data I need in the right schema.

The problem I am running into is I am getting a Notice about undefined
index since the first iteration of the += is looking for an array index
yet to be declared.

Now I figured a statement that works

$item[$data['ProductName']]['TotalQty'] =
isset($item[$data['ProductName']]['TotalQty']) ?
$item[$data['ProductName']]['TotalQty'] + $data['Qty'] : $data['Qty'];

Is there a statement that will give me something simpler then this or is
this just the way to do it.

Just curious.

Thanks
Scotty

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[Message index]

		Using += assignment recursively on an array w/o notice By: Scott Johnson on Sun, 28 October 2012 17:21
		Re: Using += assignment recursively on an array w/o notice By: Thomas 'PointedEars' on Sun, 28 October 2012 20:09
		Re: Using += assignment recursively on an array w/o notice By: Curtis Dyer on Sun, 11 November 2012 14:32
		Re: Using += assignment recursively on an array w/o notice By: Denis McMahon on Sun, 28 October 2012 21:37

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