regexp problem

[Gordan]

Hi

I have an array with following values:
419;
20;
19;20;21;
18;30;
17;20;25;
16;26;
16;17;20;21;22; 34

I would like to find out in how many keys there is "19;". If I simply search for
"19;" it will also match "419;" witch is of course wrong. I tried to write a
regexp but can't seem to pull it off. :-( Could somebody please assist me with
that regexp

thanks
gordan

[d]

Re: regexp problem

"Gordan" <gordanMAKNI@to rkul.hr> wrote in message
news:dq57af$j8t $1@news1.xnet.h r...[color=blue]
> Hi
>
> I have an array with following values:
> 419;
> 20;
> 19;20;21;
> 18;30;
> 17;20;25;
> 16;26;
> 16;17;20;21;22; 34
>
> I would like to find out in how many keys there is "19;". If I simply
> search for "19;" it will also match "419;" witch is of course wrong. I
> tried to write a regexp but can't seem to pull it off. :-( Could somebody
> please assist me with that regexp
>
> thanks
> gordan[/color]

Why are you using a regular expression? Also, how are you iterating through
your array?

dave

[Andrew @ Rockface]

Re: regexp problem

Gordan wrote:[color=blue]
> Hi
>
> I have an array with following values:
> 419;
> 20;
> 19;20;21;
> 18;30;
> 17;20;25;
> 16;26;
> 16;17;20;21;22; 34
>
> I would like to find out in how many keys there is "19;". If I simply search for
> "19;" it will also match "419;" witch is of course wrong. I tried to write a
> regexp but can't seem to pull it off. :-( Could somebody please assist me with
> that regexp[/color]

Someone will probably come up with a better regex but try:

<?php

$foo = array(
"20;",
"419;",
"19;20;21;" ,
"20;19;21;" ,
"21;20;19;" ,
"19;",
"194;",
"18;30;",
"17;20;25;" ,
"16;26;",
"16;17;20;21;22 ;34"
);

foreach ($foo as $bar) {
if (preg_match("/^19;|;19;/", $bar)) {
echo $bar."<br>\n";
}
}

?>

This matches:
19;20;21;
20;19;21;
21;20;19;
19;

--
Andrew @ Rockface
np: Naked Raygun - Metastasis [stopped]

https://www.rockface-records.co.uk

[d]

Re: regexp problem

"Andrew @ Rockface" <andrew@rockfac e-records.co.uk> wrote in message
news:dq5bb5$ibn $1@nwrdmz02.dmz .ncs.ea.ibs-infra.bt.com...[color=blue]
> Gordan wrote:[color=green]
>> Hi
>>
>> I have an array with following values:
>> 419;
>> 20;
>> 19;20;21;
>> 18;30;
>> 17;20;25;
>> 16;26;
>> 16;17;20;21;22; 34
>>
>> I would like to find out in how many keys there is "19;". If I simply
>> search for "19;" it will also match "419;" witch is of course wrong. I
>> tried to write a regexp but can't seem to pull it off. :-( Could somebody
>> please assist me with that regexp[/color]
>
> Someone will probably come up with a better regex but try:
>
> <?php
>
> $foo = array(
> "20;",
> "419;",
> "19;20;21;" ,
> "20;19;21;" ,
> "21;20;19;" ,
> "19;",
> "194;",
> "18;30;",
> "17;20;25;" ,
> "16;26;",
> "16;17;20;21;22 ;34"
> );
>
> foreach ($foo as $bar) {
> if (preg_match("/^19;|;19;/", $bar)) {
> echo $bar."<br>\n";
> }
> }[/color]

/(?:^|;)19;/ will do it, too.
[color=blue]
> ?>
>
> This matches:
> 19;20;21;
> 20;19;21;
> 21;20;19;
> 19;
>
> --
> Andrew @ Rockface
> np: Naked Raygun - Metastasis [stopped]
> www.rockface-records.co.uk[/color]

[Gordan]

Re: regexp problem

THANK YOU both it works perfectly :-)

gordan

[Rich]

Re: regexp problem


"Gordan" <gordanMAKNI@to rkul.hr> wrote in message
news:dq57af$j8t $1@news1.xnet.h r...[color=blue]
> Hi
>
> I have an array with following values:
> 419;
> 20;
> 19;20;21;
> 18;30;
> 17;20;25;
> 16;26;
> 16;17;20;21;22; 34
>
> I would like to find out in how many keys there is "19;". If I simply
> search for "19;" it will also match "419;" witch is of course wrong. I
> tried to write a regexp but can't seem to pull it off. :-( Could somebody
> please assist me with that regexp
>
> thanks
> gordan
>[/color]

To count the number of times 19 occurs, something like this would work.

<?
$myarray = array(
"419;",
"20;",
"19;20;21;" ,
"18;30;",
"17;20;25;" ,
"16;26;",
"16;17;20;21;22 ;34"
);

$num = 19;

echo "There are/is ".count(preg_gr ep("/(?:^|;)$num;/", $myarray))."
occurrence(s) of $num.";
?>


Rich