populating array3 from two other arrays when count(array1) <count(array2)

[clrockwell]

Hey all,

I could use some help with solving problem. Any suggestions are
welcome and very appreciated.

I have two arrays, $feeds and $feedDays. If they both have the same
count, or $feeds has only one value than there is not a problem.

In this situation

$feeds = array([0]=>'feed1', [1]=>'feed2');
$feedDays = array([0]=>'Monday', [1]=>'Tuesday',[2]=>'Wednesday',
[3]=>'Thursday',[4]=>'Friday');

I would like to create a third array:
$feedDays_feeds = array([0]=>0,[1]=>1,[2]=>0,[3]=>1,[4]=>0)

I am looking for a solution that can be used with any number of feeds,
but am having problems coming up with the needed logic. I went
through php.net and read all the array() functions but couldn't really
point out a solution. I am going to try and use array_pad(), but I
figured it best if I tried to get some guidance here.

Thanks for any suggestions.

[Michael Fesser]

Re: populating array3 from two other arrays when count(array1) &lt; count(array2)

..oO(clrockwell )

>I could use some help with solving problem. Any suggestions are
>welcome and very appreciated.
>
>I have two arrays, $feeds and $feedDays. If they both have the same
>count, or $feeds has only one value than there is not a problem.
>
>In this situation
>
>$feeds = array([0]=>'feed1', [1]=>'feed2');
>$feedDays = array([0]=>'Monday', [1]=>'Tuesday',[2]=>'Wednesday',
>[3]=>'Thursday',[4]=>'Friday');
>
>I would like to create a third array:
>$feedDays_feed s = array([0]=>0,[1]=>1,[2]=>0,[3]=>1,[4]=>0)

What does this array mean? I can't see how it's related to the two
above. The keys seem to be the keys taken from the $feedDays array,
but what do the values mean?

Micha

[clrockwell]

Re: populating array3 from two other arrays when count(array1) &lt;count(array 2)

On Jul 23, 11:09 am, Michael Fesser <neti...@gmx.de wrote:

.oO(clrockwell)
>

I could use some help with solving problem. Any suggestions are
welcome and very appreciated.

>

I have two arrays, $feeds and $feedDays. If they both have the same
count, or $feeds has only one value than there is not a problem.

>

In this situation

>

$feeds = array([0]=>'feed1', [1]=>'feed2');
$feedDays = array([0]=>'Monday', [1]=>'Tuesday',[2]=>'Wednesday',
[3]=>'Thursday',[4]=>'Friday');

>

I would like to create a third array:
$feedDays_feeds = array([0]=>0,[1]=>1,[2]=>0,[3]=>1,[4]=>0)

>
What does this array mean? I can't see how it's related to the two
above. The keys seem to be the keys taken from the $feedDays array,
but what do the values mean?
>
Micha

Micha,

I have two tables, 'feeds' and 'feedDays'
Feeds has columns 'id', 'url',
FeedDays has columns 'id', 'day', 'feed_id'

Every Sunday, via cron job, FeedDays get truncated and repopulated by
picking the last value in a shuffled array that is populated by feeds
table. I then pop the feeds array and take the last value for the
next day, and repeat. With 5 or more feeds, no issues.

I guess it is better shown like this:
array(
'monday' ='feed1',
'tuesday' ='feed2',
'wednesday' ='feed3',
'thursday' ='feed4',
'friday' ='feed5');

The next week could yield
array(
'monday' ='feed5',
'tuesday' ='feed4',
'wednesday' ='feed3',
'thursday' ='feed2',
'friday' ='feed1');

But if there is only 4 feeds, using array_pop() will end up with no
more values before all the feedDays have a feed. I hope this shows
how I will use it.

[petersprc]

Re: populating array3 from two other arrays when count(array1) &lt;count(array 2)

Hi,

You can use modulo arithmetic to map each element in a to the next
element in the circular array b:

$a = array('mon', 'tue', 'wed', 'thu', 'fri');
$b = array('feed1', 'feed2', 'feed3');
$c = array();

for ($i = 0; $i < count($a); $i++) {
$c[$i] = $b[$i % count($b)];
}

Regards,

John Peters

On Jul 23, 9:48 am, clrockwell <clrockw...@tru ckingshow.comwr ote:

Hey all,
>
I could use some help with solving problem. Any suggestions are
welcome and very appreciated.
>
I have two arrays, $feeds and $feedDays. If they both have the same
count, or $feeds has only one value than there is not a problem.
>
In this situation
>
$feeds = array([0]=>'feed1', [1]=>'feed2');
$feedDays = array([0]=>'Monday', [1]=>'Tuesday',[2]=>'Wednesday',
[3]=>'Thursday',[4]=>'Friday');
>
I would like to create a third array:
$feedDays_feeds = array([0]=>0,[1]=>1,[2]=>0,[3]=>1,[4]=>0)
>
I am looking for a solution that can be used with any number of feeds,
but am having problems coming up with the needed logic. I went
through php.net and read all the array() functions but couldn't really
point out a solution. I am going to try and use array_pad(), but I
figured it best if I tried to get some guidance here.
>
Thanks for any suggestions.

[clrockwell]

Re: populating array3 from two other arrays when count(array1) &lt;count(array 2)

On Jul 23, 3:50 pm, petersprc <peters...@gmai l.comwrote:

Hi,
>
You can use modulo arithmetic to map each element in a to the next
element in the circular array b:
>
$a = array('mon', 'tue', 'wed', 'thu', 'fri');
$b = array('feed1', 'feed2', 'feed3');
$c = array();
>
for ($i = 0; $i < count($a); $i++) {
$c[$i] = $b[$i % count($b)];
}
>
Regards,
>
John Peters
>
On Jul 23, 9:48 am, clrockwell <clrockw...@tru ckingshow.comwr ote:
>

Hey all,

>

I could use some help with solving problem. Any suggestions are
welcome and very appreciated.

>

I have two arrays, $feeds and $feedDays. If they both have the same
count, or $feeds has only one value than there is not a problem.

>

In this situation

>

$feeds = array([0]=>'feed1', [1]=>'feed2');
$feedDays = array([0]=>'Monday', [1]=>'Tuesday',[2]=>'Wednesday',
[3]=>'Thursday',[4]=>'Friday');

>

I would like to create a third array:
$feedDays_feeds = array([0]=>0,[1]=>1,[2]=>0,[3]=>1,[4]=>0)

>

I am looking for a solution that can be used with any number of feeds,
but am having problems coming up with the needed logic. I went
through php.net and read all the array() functions but couldn't really
point out a solution. I am going to try and use array_pad(), but I
figured it best if I tried to get some guidance here.

>

Thanks for any suggestions.

That worked great John, thanks for the tip. I have yet to use modulo
arithmetic so I looked into it. I could not find anything that stated
that this process does in fact round the number up or down. This is
not a problem in my situation, but I still would like to know whether
it is built into php or is based on the system php sits on.

i.e. 4/3 = 1.333; 5/3 = 1.666

Thanks again for the tip!