I have the folowing text
00:00:01.000 --> 00:00:02.000
ALFRED, NOČNI ČUVAJ
and with this regex:
/(\d{2}):(\d{2}):(\d{2})\.(\d{3})/
and a bit of code:
<?php
$line = "00:00:01.000 --> 00:00:02.000rnALFRED, NOČNI ČUVAJ";
$pattern1 = '(d{2}):(d{2}):(d{2}).(d{3})';
$m1 = preg_match("/^$pattern1/", $line);
if (is_numeric($m1) && $m1 > 0)
{
echo preg_replace("/$pattern1/", '$1:$2:$3,$4', $line);
}
I am matching: 00:00:01.000 –> 00:00:02.000 and replacing it with 00:00:01,000 –> 00:00:02,000
so at the end I get this out
00:00:01,000 --> 00:00:02,000
ALFRED, NOČNI ČUVAJ
it all works fine in php, example: https://www.tehplayground.com/nZkox8mkNVaC3hW6
the problem is when I got to javascript and want to do the same thing (same regex patern (even https://regexr.com/ confirned that the patern does match 00:00:01.000 –> 00:00:02.000)
function preg_match(pattern, str) {
var _flag = pattern.substr(pattern.lastIndexOf(pattern[0]) + 1),
_pattern = pattern.substr(1, pattern.lastIndexOf(pattern[0]) - 1);
return (new RegExp(_pattern, _flag)).test(str);
}
/**
* preg_replace (from PHP) in JavaScript!
*
* This is basically a pattern replace. You can use a regex pattern to search and
* another for the replace. For more information see the PHP docs on the original
* function (http://php.net/manual/en/function.preg-replace.php), and for more on
* JavaScript flavour regex visit http://www.regular-expressions.info/javascript.html
*
* NOTE: Unlike the PHP version, this function only deals with string inputs. No arrays.
*
* @author William Duyck <[email protected]>
* @license http://www.mozilla.org/MPL/2.0/ Mozilla Public License 2.0
*
* @param {String} pattern The pattern to search for.
* @param {String} replace The string to replace.
* @param {String} subject The string to search and replace.
* @param {Integer} limit The maximum possible replacements.
* @return {String} If matches are found, the new subject will be returned.
*/
var preg_replace = function(pattern, replace, subject, limit) {
if (limit === undefined) {
limit = -1;
}
var _flag = pattern.substr(pattern.lastIndexOf(pattern[0]) + 1),
_pattern = pattern.substr(1, pattern.lastIndexOf(pattern[0]) - 1),
reg = new RegExp(_pattern, _flag),
rs = null,
res = [],
x = 0,
y = 0,
rtn = subject;
var tmp = [];
if (limit === -1) {
do {
tmp = reg.exec(subject);
if (tmp !== null) {
res.push(tmp);
}
} while (tmp !== null && _flag.indexOf('g') !== -1);
} else {
res.push(reg.exec(subject));
}
for (x = res.length - 1; x > -1; x--) {
tmp = replace;
for (y = res[x].length; y > -1; y--) {
tmp = tmp.replace('${' + y + '}', res[x][y])
.replace('$' + y, res[x][y])
.replace('\' + y, res[x][y]);
}
rtn = rtn.replace(res[x][0], tmp);
}
return rtn;
};
line = "00:00:01.000 --> 00:00:02.000rnALFRED, NOČNI ČUVAJ";
pattern1 = '(\d{2}):(\d{2}):(\d{2}).(\d{3})';
m1 = preg_match("/^" + pattern1 + "/", line);
if (m1) {
console.log(preg_replace("/" + pattern1 + "/", '$1:$2:$3,$4', line));
}
Example: https://jsfiddle.net/a2mzkhew/
as you can see I get this out
00:00:01,000 --> 00:00:02.000
ALFRED, NOČNI ČUVAJ
as you can see only first word (00:00:01,000) til –> is matched, the other one (00:00:02.000) is not
What am I doing wrong that I have so diferent results if I swich languages (I tried to make things as similar as possible (even replicating regex_match and regex_replace in javascript) so this will not happen
Thanks for Anwsering
2
Answers
So, your question was: "how to convert
00:00:01.000 --> 00:00:02.000
to00:00:01,000 --> 00:00:02,000
in JavaScript"?which basically replaces the
"."
with","
given a positive lookbehind(?<=)
pattern and a positive lookahead(?=)
pattern, whereb
stands for Word Boundary.You are not searching for more than one match. Adding
g
to your regular expression will make it do both replacements