a quick question about array keys
Tontonq Tontonq
lets say i have an array like that
Array
(
[300] => 300
[301] => 301
[302] => 302
[303] => 303
[304] => 304
[305] => 305
[306] => 306
[307] => 307
[308] => 308
...
how can i change keys to 0,1,2,3,.. by faster way
(it should like that) >
Array
(
[0] => 300
[1] => 301
[2] => 302
[3] => 303
....
Joshua Kehn
$tmp = array();
foreach($old_array as $key => $value)
{
$tmp[$value] = $key;
}
But knowing PHP there is probably some array_reverse_keys() function.
Regards,
-Josh
____________________________________
Joshua Kehn | Josh...@gmail.com
http://joshuakehn.com
Ashley Sheridan
> On 31 August 2010 16:45, Ashley Sheridan <a...@ashleysheridan.co.uk> wrote:
> > There are two ways I see to do it. You can iterate the array and create
> > a copy, assigning elements dynamic values:
> >
> > $new_array = array();
> > foreach($array as $a)
> > {
> > $new_array[] = $a;
> > }
> >
> > or use a sorting function on it that doesn't preserve the keys (as in
> > your example all the values in the array were in numerical order.
> >
> > $new_array = sort($array);
>
> sort() operates in the array. It does not return a new array, just a
> bool to indicate success or not.
>
> http://docs.php.net/sort
>
>
>
Ah, my bad!
Thanks,
Ash
http://www.ashleysheridan.co.uk
Tontonq Tontonq
continue until if its more big than +2 and it
2010/8/31 Ashley Sheridan <a...@ashleysheridan.co.uk>
> On Tue, 2010-08-31 at 19:06 +0300, Tontonq Tontonq wrote:
>
> Ty four your all replies i got 9 replies less than 10 minutes :)
>
> than can u answer this too
> my array is like that for now
> Array
> (
> [300] => 300
> [301] => 301
> [302] => 302
> [303] => 303
> [304] => 304
> [305] => 305
> [306] => 306
> [307] => 307
> [308] => 308
> [309] => 309
> [310] => 310
> [311] => 311
> [312] => 312
> [313] => 313
> [314] => 314
> [165] => 165
> [166] => 166
> [167] => 167
> [168] => 168
> [169] => 169
> [170] => 170
> [171] => 171
> [172] => 172
> [173] => 173
> [201] => 201
> [202] => 202
> [203] => 203
> [204] => 204
> [205] => 205
> [206] => 206
> [207] => 207
> [208] => 208
> [209] => 209
> [210] => 210
> [211] => 211
> [212] => 212
> [213] => 213
> [214] => 214
> [215] => 215
> [315] => 315
>
> how can i make an array
> that will store values like
> Array
> (
> [0] => 300-314
> [1] => 165-173
> )
>
> i hope if u did understand me :D
>
> 2010/8/31 la...@garfieldtech.com <la...@garfieldtech.com>
>
> > The fastest way is going to be array_values():
> >
> > http://www.php.net/array_values
> >
> > --Larry Garfield
> > --
> > PHP General Mailing List (http://www.php.net/)
> > To unsubscribe, visit: http://www.php.net/unsub.php
> >
> >
>
>
> Oops, I slightly mis-read the question there in my last post. I'm not
> actually sure what it is you *are* after though.
>
>
> Thanks,
> Ash
> http://www.ashleysheridan.co.uk
>
>
>
Richard Quadling
> There are two ways I see to do it. You can iterate the array and create
> a copy, assigning elements dynamic values:
>
> $new_array = array();
> foreach($array as $a)
> {
> $new_array[] = $a;
> }
>
> or use a sorting function on it that doesn't preserve the keys (as in
> your example all the values in the array were in numerical order.
>
> $new_array = sort($array);
sort() operates in the array. It does not return a new array, just a
bool to indicate success or not.
--
Richard Quadling
Twitter : EE : Zend
@RQuadling : e-e.com/M_248814.html : bit.ly/9O8vFY
Ashley Sheridan
> Ty four your all replies i got 9 replies less than 10 minutes :)
>
> than can u answer this too
> my array is like that for now
> Array
> (
> [300] => 300
> [301] => 301
> [302] => 302
> [303] => 303
> [304] => 304
> [305] => 305
> [306] => 306
> [307] => 307
> [308] => 308
> > --
> > PHP General Mailing List (http://www.php.net/)
> > To unsubscribe, visit: http://www.php.net/unsub.php
> >
> >
I'd use a loop for something like that:
$new_array = array('0-300'=>0, '301-400'=>0, '401-500'=>0, '501+'=>0);
foreach($old_array as $a)
{
switch(true)
{
case $a <= 300:
{
$new_array['0-300']++;
break;
}
case $a <= 400:
{
$new_array['301-400']++;
break;
}
case $a <= 500:
{
$new_array['401-500']++;
break;
}
default:
{
$new_array['501+']++;
break;
}
}
}
Thanks,
Ash
http://www.ashleysheridan.co.uk
Richard Quadling
> Array
> (
> [300] => 300
> [301] => 301
> [302] => 302
> [303] => 303
> [304] => 304
> [305] => 305
> [306] => 306
> [307] => 307
> [308] => 308
$newData = array();
$firstValue = null;
$lastValue = null;
foreach($data as $value)
{
// New first value.
if (is_null($firstValue))
{
$firstValue = $value;
$lastValue = null;
}
// New last value and is the same or 1 more.
if (is_null($lastValue))
{
$lastValue = $value;
}
// Is the value this or the next value from $lastValue
else if($value == $lastValue || $value == 1 + $lastValue)
{
$lastValue = $value;
}
// We have a break;
else
{
$newData[] = "$firstValue-$lastValue";
$firstValue = $lastValue = null;
Tontonq Tontonq
than can u answer this too
my array is like that for now
Array
(
[300] => 300
[301] => 301
[302] => 302
[303] => 303
[304] => 304
[305] => 305
[306] => 306
[307] => 307
[308] => 308
how can i make an array
that will store values like
Array
(
[0] => 300-314
[1] => 165-173
)
i hope if u did understand me :D
2010/8/31 la...@garfieldtech.com <la...@garfieldtech.com>
> The fastest way is going to be array_values():
>
> http://www.php.net/array_values
>
> --Larry Garfield
>
>
> On 8/31/10 10:43 AM, Tontonq Tontonq wrote:
>
Joshua Kehn
> That doesn't actually answer the question, it just changes the key/value pairs around. There is a built-in function for this in PHP, but it's not what the OP asked for.
>
> Thanks,
> Ash
> http://www.ashleysheridan.co.uk
>
>
I misread the question as flipping array keys, my mistake.
Frank Arensmeier
/frank
Skickat från min iPhone.
Richard Quadling
> On 31 August 2010 17:39, Richard Quadling <rqua...@gmail.com> wrote:
>> On 31 August 2010 17:06, Tontonq Tontonq <roo...@gmail.com> wrote:
>>> Array
>>> (
>>> [300] => 300
>>> [301] => 301
If you add a ...
sort($data) ...
just before the foreach() loop...
Array
(
[0] => 101
[1] => 165-173
[2] => 201-215
[3] => 300-316
[4] => 987
)
Watch out for duplicate values.
I changed 315 and 316 to 305 and 306...
unsorted ...
Array
(
[0] => 300-314
[1] => 165-173
[2] => 201-215
[3] => 101
[4] => 305-306
[5] => 987
)
sorted ...
Array
(
[0] => 101
[1] => 165-173
[2] => 201-215
[3] => 300-305
[4] => 305-306
[5] => 306-314
[6] => 987
)
Richard Quadling
>> Array
>> (
>> [300] => 300
>> [301] => 301
Not sure what happened there!
<?php
$data = array
(
300 => 300,
301 => 301,
302 => 302,
303 => 303,
304 => 304,
305 => 305,
306 => 306,
307 => 307,
308 => 308,
309 => 309,
310 => 310,
311 => 311,
312 => 312,
313 => 313,
314 => 314,
165 => 165,
166 => 166,
167 => 167,
168 => 168,
169 => 169,
170 => 170,
171 => 171,
172 => 172,
173 => 173,
201 => 201,
202 => 202,
203 => 203,
204 => 204,
205 => 205,
206 => 206,
207 => 207,
208 => 208,
209 => 209,
210 => 210,
211 => 211,
212 => 212,
213 => 213,
214 => 214,
215 => 215,
101 => 101,
315 => 315,
316 => 316,
987 => 987,
);
$newData = array();
$firstValue = null;
$lastValue = null;
foreach($data as $value)
{
// New first value.
if (is_null($firstValue))
{
$firstValue = $value;
$lastValue = null;
}
// New last value and is the same or 1 more or ongoing value
else if ((is_null($lastValue) && $value == 1 + $firstValue) || $value
== 1 + $lastValue)
{
$lastValue = $value;
}
// We have a break;
else
{
if (!is_null($lastValue))
{
$newData[] = "$firstValue-$lastValue";
}
else
{
$newData[] = "$firstValue";
}
$lastValue = null;
$firstValue = $value;
}
}
if (!is_null($firstValue))
{
if (!is_null($lastValue))
{
$newData[] = "$firstValue-$lastValue";
}
else
{
$newData[] = "$firstValue";
}
}
print_r($newData);
?>
outputs ...
Array
(
[0] => 300-314
[1] => 165-173
[2] => 201-215
[3] => 101
[4] => 315-316
[5] => 987
)
la...@garfieldtech.com
Ashley Sheridan
There are two ways I see to do it. You can iterate the array and create
a copy, assigning elements dynamic values:
$new_array = array();
foreach($array as $a)
{
$new_array[] = $a;
}
or use a sorting function on it that doesn't preserve the keys (as in
your example all the values in the array were in numerical order.
$new_array = sort($array);
Having said that, if the key isn't important, and it doesn't seem to be
if you want to change it, then why not use a foreach and leave the key
as it is?
Thanks,
Ash
http://www.ashleysheridan.co.uk
Ashley Sheridan
Richard Quadling
$array = array_values($array);
Or, if you don't want to preserve the original array AND you want the
data sorted ...
sort($array);