Re: [PHP] Question - foreach.
At 3:46 PM -0400 6/10/10, Paul M Foster wrote: On Thu, Jun 10, 2010 at 11:16:08AM -0400, tedd wrote: I spend much of my time thinking Did I do that before? grin I know the feeling. I will say this, though. I have yet to figure out, from your URLs, how your site(s) is/are organized. Maybe a reorg would help? Paul Paul: Unfortunately, I really don't follow an organization plan for my demos on any of my sites (well over a dozen now). Please understand that when I started creating demos, I only wanted to see how a specific thing worked. I had no idea that this investigation would become a giant listing of stuff. I could explain how I can easily create demos if you want, but it's pretty basic stuff using includes for a common header/footer files leaving only the specific of the topic to be added. The hard part is just finding a layout that you like -- after that it's pretty easy to duplicate it each time you want to demo something. I will be updating my sperling.com soon to add in language specific code (php/css/js) -- and that *will* be organized into categories. However, that may be down the road because I have a few other pressing matters that are pulling me in several different directions. Cheers, tedd -- --- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Question - foreach.
At 7:19 AM +0530 6/10/10, Shreyas wrote:
PHP'ers,
I am reading a PHP book which explains foreach and at the end says : *'When
foreach starts walking through an array, it moves the pointer to
the beginning of the array. You don't need to reset an array before
walking through it with foreach.'*
*
*
*Does this mean - *
*1) Before I navigate the array, foreach will bring the pointer to the
starting key?*
*2) After the first index, it goes to 2nd, 3rd, and nth? *
Regards,
Shreyas
Shreyas:
This is one of those questions that you can test very easily, just
initialize an array and try it.
?php
$test = array(a, b, c, d);
foreach ($test as $value)
{
echo(value = $value br);
}
?
As the references show, there are two versions of the foreach, the
one above and this:
?php
$test = array(a, b, c, d);
foreach ($test as $key = $value)
{
echo($key= $key value=$value br);
}
?
Note that you can pull-out the index (i.e., $key) as well as the
value (i.e., $value) of each index. The br is only to add a
linefeed in html.
This is a bit easier than using a for() loop.
Cheers,
tedd
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Re: [PHP] Question - foreach.
On Thu, Jun 10, 2010 at 07:03:28AM -0400, tedd wrote: At 7:19 AM +0530 6/10/10, Shreyas wrote: PHP'ers, I am reading a PHP book which explains foreach and at the end says : *'When foreach starts walking through an array, it moves the pointer to the beginning of the array. You don't need to reset an array before walking through it with foreach.'* * * *Does this mean - * *1) Before I navigate the array, foreach will bring the pointer to the starting key?* *2) After the first index, it goes to 2nd, 3rd, and nth? * Regards, Shreyas Shreyas: This is one of those questions that you can test very easily, just initialize an array and try it. +1 This is Tedd's modus operandi. His website(s) are full of exactly this type of thing. And I have to agree. I can't count the number of questions I *haven't* asked on this list, because I built a page to test a particular concept. And this sort of activity (as opposed to just reading about something) really locks in your understanding of a concept. Paul -- Paul M. Foster -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Question - foreach.
All, I tried and tested it but wanted a solid confirmation on it. I felt foreach usage is better than manual way of next(), prev() et al. Thanks for the comments. I consider the thread answered and solved unless someone has anything more to add. Regards, Shreyas On Thu, Jun 10, 2010 at 7:02 PM, Paul M Foster pa...@quillandmouse.comwrote: On Thu, Jun 10, 2010 at 07:03:28AM -0400, tedd wrote: At 7:19 AM +0530 6/10/10, Shreyas wrote: PHP'ers, I am reading a PHP book which explains foreach and at the end says : *'When foreach starts walking through an array, it moves the pointer to the beginning of the array. You don't need to reset an array before walking through it with foreach.'* * * *Does this mean - * *1) Before I navigate the array, foreach will bring the pointer to the starting key?* *2) After the first index, it goes to 2nd, 3rd, and nth? * Regards, Shreyas Shreyas: This is one of those questions that you can test very easily, just initialize an array and try it. +1 This is Tedd's modus operandi. His website(s) are full of exactly this type of thing. And I have to agree. I can't count the number of questions I *haven't* asked on this list, because I built a page to test a particular concept. And this sort of activity (as opposed to just reading about something) really locks in your understanding of a concept. Paul -- Paul M. Foster -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- Regards, Shreyas
Re: [PHP] Question - foreach.
At 9:32 AM -0400 6/10/10, Paul M Foster wrote: On Thu, Jun 10, 2010 at 07:03:28AM -0400, tedd wrote: This is one of those questions that you can test very easily, just initialize an array and try it. +1 This is Tedd's modus operandi. His website(s) are full of exactly this type of thing. And I have to agree. I can't count the number of questions I *haven't* asked on this list, because I built a page to test a particular concept. And this sort of activity (as opposed to just reading about something) really locks in your understanding of a concept. Paul Paul: Now, if I could get the old memory to lock in and remember it, it would be great! I spend much of my time thinking Did I do that before? Cheers, tedd -- --- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Question - foreach.
On Thu, Jun 10, 2010 at 11:16:08AM -0400, tedd wrote: At 9:32 AM -0400 6/10/10, Paul M Foster wrote: On Thu, Jun 10, 2010 at 07:03:28AM -0400, tedd wrote: This is one of those questions that you can test very easily, just initialize an array and try it. +1 This is Tedd's modus operandi. His website(s) are full of exactly this type of thing. And I have to agree. I can't count the number of questions I *haven't* asked on this list, because I built a page to test a particular concept. And this sort of activity (as opposed to just reading about something) really locks in your understanding of a concept. Paul Paul: Now, if I could get the old memory to lock in and remember it, it would be great! I spend much of my time thinking Did I do that before? grin I know the feeling. I will say this, though. I have yet to figure out, from your URLs, how your site(s) is/are organized. Maybe a reorg would help? Paul -- Paul M. Foster -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Question - foreach.
From: Paul M Foster On Thu, Jun 10, 2010 at 11:16:08AM -0400, tedd wrote: At 9:32 AM -0400 6/10/10, Paul M Foster wrote: On Thu, Jun 10, 2010 at 07:03:28AM -0400, tedd wrote: Paul: Now, if I could get the old memory to lock in and remember it, it would be great! I spend much of my time thinking Did I do that before? grin I know the feeling. I will say this, though. I have yet to figure out, from your URLs, how your site(s) is/are organized. Maybe a reorg would help? ISTR there are three signs of old age. The first is loss of memory, but I can never remember the other two. Bob McConnell -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Question - foreach.
On Thursday 10 June 2010 11:16:08 tedd wrote: At 9:32 AM -0400 6/10/10, Paul M Foster wrote: On Thu, Jun 10, 2010 at 07:03:28AM -0400, tedd wrote: This is one of those questions that you can test very easily, just initialize an array and try it. +1 This is Tedd's modus operandi. His website(s) are full of exactly this type of thing. And I have to agree. I can't count the number of questions I *haven't* asked on this list, because I built a page to test a particular concept. And this sort of activity (as opposed to just reading about something) really locks in your understanding of a concept. Paul Paul: Now, if I could get the old memory to lock in and remember it, it would be great! I spend much of my time thinking Did I do that before? Looks like you and I are in the same boat! My memory these days has went to the dumps. Although I do the same thing Paul does to actually grasp a more in depth understanding of something, sometimes in a day or two it's often forgotten. -- Blessings, David M. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Question - foreach.
PHP'ers, I am reading a PHP book which explains foreach and at the end says : *'When foreach starts walking through an array, it moves the pointer to the beginning of the array. You don’t need to reset an array before walking through it with foreach.'* * * *Does this mean - * *1) Before I navigate the array, foreach will bring the pointer to the starting key?* *2) After the first index, it goes to 2nd, 3rd, and nth? * Regards, Shreyas
Re: [PHP] Question - foreach.
On Wed, Jun 9, 2010 at 9:49 PM, Shreyas shreya...@gmail.com wrote: PHP'ers, I am reading a PHP book which explains foreach and at the end says : *'When foreach starts walking through an array, it moves the pointer to the beginning of the array. You don’t need to reset an array before walking through it with foreach.'* * * *Does this mean - * *1) Before I navigate the array, foreach will bring the pointer to the starting key?* *2) After the first index, it goes to 2nd, 3rd, and nth? * Regards, Shreyas Number 1. Adam -- Nephtali: PHP web framework that functions beautifully http://nephtaliproject.com
Re: [PHP] Question - foreach.
Shreyas wrote: PHP'ers, I am reading a PHP book which explains foreach and at the end says : *'When foreach starts walking through an array, it moves the pointer to the beginning of the array. You don’t need to reset an array before walking through it with foreach.'* * * *Does this mean - * *1) Before I navigate the array, foreach will bring the pointer to the starting key?* *2) After the first index, it goes to 2nd, 3rd, and nth? * Regards, Shreyas Here is your best reference: http://php.net/foreach Look at the two Notes sections on the top of the page. The first says this: Note: When foreach first starts executing, the internal array pointer is automatically reset to the first element of the array. This means that you do not need to call reset() before a foreach loop. Basically what you said. But then the second says this Note: Unless the array is referenced, foreach operates on a copy of the specified array and not the array itself. foreach has some side effects on the array pointer. Don't rely on the array pointer during or after the foreach without resetting it. -- Jim Lucas A: Maybe because some people are too annoyed by top-posting. Q: Why do I not get an answer to my question(s)? A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Question - foreach.
On Wed, Jun 9, 2010 at 21:49, Shreyas shreya...@gmail.com wrote: PHP'ers, I am reading a PHP book which explains foreach and at the end says : *'When foreach starts walking through an array, it moves the pointer to the beginning of the array. You don’t need to reset an array before walking through it with foreach.'* * * *Does this mean - * [snip!] An easy way to think about it: foreach is cocky and doesn't give a damn about the rules array functions or placements have set in place. It'll start from the beginning, and to hell with everyone else. In other words: foreach will iterate wholly; it will count *for* *each* key in the loop, not just where another portion of the code left off. -- /Daniel P. Brown daniel.br...@parasane.net || danbr...@php.net http://www.parasane.net/ || http://www.pilotpig.net/ We now offer SAME-DAY SETUP on a new line of servers! -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
