php-general Digest 24 Mar 2012 12:39:43 -0000 Issue 7742
php-general Digest 24 Mar 2012 12:39:43 - Issue 7742
Topics (messages 317240 through 317245):
Re: Thinking out loud - a continuation...
317240 by: Jay Blanchard
317243 by: Robert Cummings
317244 by: Robert Cummings
317245 by: Jay Blanchard
Re: foreach weirdness
317241 by: Simon Schick
317242 by: Robert Cummings
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---BeginMessage---
[snip]
…stuff….
[/snip]
For those interested here is where the problem seems to occur -
$child = array
(
'id' = $id,
'parentId' = $pid,
'children' = array()
);
$children[$id][] = $child;
foreach( $parents[$pid] as $items ){
foreach( $items as $item ){
$item['children'][$id] = $child; // error: Cannot use
string offset as an array
}
}
Maybe someone will see this and know what's going on. Before the foreach
$children is an array.
---End Message---
---BeginMessage---
On 12-03-23 05:26 PM, Jay Blanchard wrote:
[snip]
$item['children'] should be an array, somehow a string has been assigned :/
[/snip]
Yep. I am trying to figure that out now. I'm sure it is something really small.
[/snip]
I have been hammering away at it for a while now and still cannot find the
issue. I'll push away for a while and come back to it. Robert I owe you so many
thinks for getting me this far and opening me up to making this more efficient.
I just have to push on through and get to the point where the JSON can be
created and consumed. If any light bulb goes on over your head would you let me
know. I have tried everything that I know works to keep this from being a
string - I am just missing something.
Hi Jay,
Did you send me a sample dump for your table :)
Cheers,
Rob.
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---End Message---
---BeginMessage---
On 12-03-23 05:41 PM, Jay Blanchard wrote:
[-- DELETED GARBAGE --] :)
I just realized... I've been stuck in a thinking rut. I latched onto one
solution that works well in some case but didn't fully examine the
nuances of your own scenario. Given the way you are creating your
hierarchy you will ultimately retrieve all rows. As such the following
simple solution will do what you need:
?php
$company = 1;
$query =
SELECT DISTINCT
. *
.FROM
. tiers
.WHERE
. company = {$company} ;
$root = array();
if( $db-query( $query ) )
{
while( ($row = $db-fetchRow()) )
{
$focus = $root;
for( $i = 1; $i = 14; $i++ )
{
$name = $row['tier'.$i];
if( !isset( $focus[$name] ) )
{
$focus[$name] = array();
}
$focus = $focus[$name];
}
}
}
$json = JSON_encode( $root );
?
Cheers,
Rob.
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---End Message---
---BeginMessage---
[snip]
Did you send me a sample dump for your table :)
[/snip]
I'll do that today. I got side-tracked last night.
---End Message---
---BeginMessage---
2012/3/23 Robert Cummings rob...@interjinn.com
On 12-03-23 11:16 AM, Arno Kuhl wrote:
it still does not produce the correct result:
0 1 3 6 10 15 21
0 1 3 6 10 15 15
This looks like a bug... the last row should be the same. What version of
PHP are you using? Have you checked the online bug reports?
Hi, Robert
Does not seem like a bug to me ...
http://schlueters.de/blog/archives/141-References-and-foreach.html
What you should do to get the expected result:
Unset the variable after you don't need this reference any longer.
Bye
Simon
---End Message---
---BeginMessage---
On 12-03-23 06:30 PM, Simon Schick wrote:
2012/3/23 Robert Cummingsrob...@interjinn.com
On 12-03-23 11:16 AM, Arno Kuhl wrote:
it still does not produce the correct result:
0 1 3 6 10 15 21
0 1 3 6 10 15 15
This looks like a bug... the last row should be the same. What version of
PHP are you using? Have you checked the online bug reports?
Hi, Robert
Re: [PHP] Thinking out loud - a continuation...
[snip] Did you send me a sample dump for your table :) [/snip] I'll do that today. I got side-tracked last night. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Thinking out loud - a continuation...
On Mar 23, 2012, at 11:24 PM, Robert Cummings wrote:
On 12-03-23 05:41 PM, Jay Blanchard wrote:
[-- DELETED GARBAGE --] :)
I just realized... I've been stuck in a thinking rut. I latched onto one
solution that works well in some case but didn't fully examine the nuances of
your own scenario. Given the way you are creating your hierarchy you will
ultimately retrieve all rows. As such the following simple solution will do
what you need:
?php
$company = 1;
$query =
SELECT DISTINCT
. *
.FROM
. tiers
.WHERE
. company = {$company} ;
$root = array();
if( $db-query( $query ) )
{
while( ($row = $db-fetchRow()) )
{
$focus = $root;
for( $i = 1; $i = 14; $i++ )
{
$name = $row['tier'.$i];
if( !isset( $focus[$name] ) )
{
$focus[$name] = array();
}
$focus = $focus[$name];
}
}
}
$json = JSON_encode( $root );
?
Cheers,
Rob.
--
At first blush I'm not sure how this would work - but I haven't had any coffee
yet either. I'll give this a shot in a little while. Seems almost too easy.
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Re: [PHP] Thinking out loud - a continuation...
On Sat, Mar 24, 2012 at 7:41 AM, Jay Blanchard
jay.blanch...@sigmaphinothing.org wrote:
On Mar 23, 2012, at 11:24 PM, Robert Cummings wrote:
On 12-03-23 05:41 PM, Jay Blanchard wrote:
[-- DELETED GARBAGE --] :)
I just realized... I've been stuck in a thinking rut. I latched onto one
solution that works well in some case but didn't fully examine the nuances
of your own scenario. Given the way you are creating your hierarchy you will
ultimately retrieve all rows. As such the following simple solution will do
what you need:
?php
$company = 1;
$query =
SELECT DISTINCT
. *
.FROM
. tiers
.WHERE
. company = {$company} ;
$root = array();
if( $db-query( $query ) )
{
while( ($row = $db-fetchRow()) )
{
$focus = $root;
for( $i = 1; $i = 14; $i++ )
{
$name = $row['tier'.$i];
if( !isset( $focus[$name] ) )
{
$focus[$name] = array();
}
$focus = $focus[$name];
}
}
}
$json = JSON_encode( $root );
?
Cheers,
Rob.
--
At first blush I'm not sure how this would work - but I haven't had any
coffee yet either. I'll give this a shot in a little while. Seems almost too
easy.
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This has been fascinating to read. I hope you get it figured out, Jay!
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Re: [PHP] foreach weirdness
On 3/23/2012 10:11 PM, Robert Cummings wrote: On 12-03-23 06:30 PM, Simon Schick wrote: 2012/3/23 Robert Cummingsrob...@interjinn.com On 12-03-23 11:16 AM, Arno Kuhl wrote: it still does not produce the correct result: 0 1 3 6 10 15 21 0 1 3 6 10 15 15 This looks like a bug... the last row should be the same. What version of PHP are you using? Have you checked the online bug reports? Hi, Robert Does not seem like a bug to me ... http://schlueters.de/blog/archives/141-References-and-foreach.html What you should do to get the expected result: Unset the variable after you don't need this reference any longer. Ah yes... that clued me in. I disagree with the article's generalization with respect to references since references accomplish some things that cannot be accomplished otherwise, but even I missed the fact that the second loop was using a variable that was a reference to the last element of the array as created in the first loop *lol*. The user's very act of checking their results was confounding the result... I love it :) Cheers, Rob. Re, your ...that cannot be accomplished otherwise,... Can you provide some examples? The only ones I've found are when using create_function() and the arguments for callback functions. I can't even remember or find in my code an example of my foreach()loops needed it. Seems, I recall earlier versions of PHP [4? ]required references for variables. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] foreach weirdness
On 12-03-24 11:15 AM, Al wrote: On 3/23/2012 10:11 PM, Robert Cummings wrote: On 12-03-23 06:30 PM, Simon Schick wrote: 2012/3/23 Robert Cummingsrob...@interjinn.com On 12-03-23 11:16 AM, Arno Kuhl wrote: it still does not produce the correct result: 0 1 3 6 10 15 21 0 1 3 6 10 15 15 This looks like a bug... the last row should be the same. What version of PHP are you using? Have you checked the online bug reports? Hi, Robert Does not seem like a bug to me ... http://schlueters.de/blog/archives/141-References-and-foreach.html What you should do to get the expected result: Unset the variable after you don't need this reference any longer. Ah yes... that clued me in. I disagree with the article's generalization with respect to references since references accomplish some things that cannot be accomplished otherwise, but even I missed the fact that the second loop was using a variable that was a reference to the last element of the array as created in the first loop *lol*. The user's very act of checking their results was confounding the result... I love it :) Cheers, Rob. Re, your ...that cannot be accomplished otherwise,... Can you provide some examples? The only ones I've found are when using create_function() and the arguments for callback functions. I can't even remember or find in my code an example of my foreach()loops needed it. Seems, I recall earlier versions of PHP [4? ]required references for variables. After I submitted ...that cannot be accomplished otherwise,..., I realized it was a patently false statement (a turing machine is a turing machine :). The intent of the statement though was to indicate the greater difficulty in achieving something relatively simple with references. See the other thread Thinking out loud - continuation. My post dated 2012-03-24 00:24 shows a process that is cumbersome and inefficient to implement in another fashion. References are like pointers... very powerful but with cautions for the unwary. Cheers, Rob. -- E-Mail Disclaimer: Information contained in this message and any attached documents is considered confidential and legally protected. This message is intended solely for the addressee(s). Disclosure, copying, and distribution are prohibited unless authorized. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Thinking out loud - a continuation...
On 12-03-24 08:41 AM, Jay Blanchard wrote:
On Mar 23, 2012, at 11:24 PM, Robert Cummings wrote:
On 12-03-23 05:41 PM, Jay Blanchard wrote:
[-- DELETED GARBAGE --] :)
I just realized... I've been stuck in a thinking rut. I latched onto one
solution that works well in some case but didn't fully examine the nuances of
your own scenario. Given the way you are creating your hierarchy you will
ultimately retrieve all rows. As such the following simple solution will do
what you need:
?php
$company = 1;
$query =
SELECT DISTINCT
. *
.FROM
. tiers
.WHERE
. company = {$company} ;
$root = array();
if( $db-query( $query ) )
{
while( ($row = $db-fetchRow()) )
{
$focus =$root;
for( $i = 1; $i= 14; $i++ )
{
$name = $row['tier'.$i];
if( !isset( $focus[$name] ) )
{
$focus[$name] = array();
}
$focus =$focus[$name];
}
}
}
$json = JSON_encode( $root );
?
The crux of it is:
$focus = $focus[$name];
because it facilitates moving deeper and deeper into the array.
Cheers,
Rob.
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Re: [PHP] Thinking out loud - a continuation...
[snip]The crux of it is:
$focus = $focus[$name];
[/snip]
It works as I expect so far. All I have to do is figure out how to make the
element a name: element in the JSON. for instance an element would look like
this
{
name: Bob,
children: []
}
So the PHP array would have to look like this -
$json = array (
name = Bob,
children = array (
name = Angie
)
)
and so on. This is for one of the services that will consume the JSON.
Re: [PHP] Thinking out loud - a continuation...
On 12-03-24 01:09 PM, Jay Blanchard wrote:
[snip]The crux of it is:
$focus =$focus[$name];
[/snip]
It works as I expect so far. All I have to do is figure out how to make the
element a name: element in the JSON. for instance an element would look like
this
{
name: Bob,
children: []
}
So the PHP array would have to look like this -
$json = array (
name = Bob,
children = array (
name = Angie
)
)
and so on. This is for one of the services that will consume the JSON.
A little tweak here... a little tweak there:
?php
//
// Establish the root.
//
$company = 1;
$query =
SELECT DISTINCT
. *
.FROM
. tiers
.WHERE
. company = {$company} ;
$root = array();
if( $db-query( $query ) )
{
while( ($row = $db-fetchRow()) )
{
$focus = $root;
for( $i = 1; $i = 14; $i++ )
{
$name = $row['tier'.$i];
if( !isset( $focus[$name] ) )
{
$focus[$name] = array
(
'name' = $name,
'children' = array(),
);
}
$focus = $focus[$name]['children'];
}
}
}
$json = JSON_encode( $root );
?
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Re: [PHP] Thinking out loud - a continuation...
[snip]
A little tweak here... a little tweak there:
[/snip]
if( !isset( $focus[$name] ) )
{
$focus[$name] = array
(
'name' = $name,
'children' = array(),
);
}
$focus = $focus[$name]['children'];
}
}
}
[/snip]
Bingo! We have a winner! I had already started on the $focus[$name] array as
you have shown, I just hadn't figured out the $focus[$name]['children'] part.
Thank you so much Robert - you're a real asset to the PHP community!
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Re: [PHP] Thinking out loud - a continuation...
[snip]
A little tweak here... a little tweak there:
[/snip]
One more little tweak may be required. The JSON looks like this
{Executives and Management:{name:Executives and Management,children:{
The first part {Executives and Management: needs to be removed. I think I
know what to do.
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Re: [PHP] Thinking out loud - a continuation...
[snip]
One more little tweak may be required. The JSON looks like this
{Executives and Management:{name:Executives and Management,children:{
The first part {Executives and Management: needs to be removed. I think I
know what to do.
[/snip]
It has become painfully obvious that I do not know what to do. Ready to call it
a day. Besides I just burned my finger setting up the smoker for the ribs.
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Re: [PHP] Thinking out loud - a continuation...
On 12-03-24 04:11 PM, Jay Blanchard wrote:
[snip]
One more little tweak may be required. The JSON looks like this
{Executives and Management:{name:Executives and Management,children:{
The first part {Executives and Management: needs to be removed. I think I
know what to do.
[/snip]
It has become painfully obvious that I do not know what to do. Ready to call it
a day. Besides I just burned my finger setting up the smoker for the ribs.
It's a necessary part of building the structure. It can be removed but
only as a post process. Why does it have to be removed? You can loop
through the structure in JavaScript without paying heed to the key's value.
If it absolutely must go... you need to recurse through the final
structure replacing each children entry with the results of passing it
through array_values().
Cheers,
Rob.
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