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Regex lookahead, lookbehind and atomic groups
... doesn't support look-behind assertions. And most flavors that support it (PHP, Python etc) require that look-behind portion to have a fixed length.
Atomic groups basically discards/forgets the subsequent tokens in the group once a token matches. Check this page for examples of atomic groups
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Regular Expression for alphanumeric and underscores
...A-Z, a-z, or underscore (_).
Here is how you would do that:
Tested under php:
$regex = '/^[A-Za-z_][A-Za-z\d_]*$/'
or take this
^[A-Za-z_][A-Za-z\d_]*$
and place it in your development language.
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How to use Regular Expressions (Regex) in Microsoft Excel both in-cell and loops
...alues of 12abc will return abc, value of 1abc will return abc, value of abc123 will return "Not Matched" because the digits were not at the start of the string.
Private Sub simpleRegex()
Dim strPattern As String: strPattern = "^[0-9]{1,2}"
Dim strReplace As String: strReplace = ""
Dim r...
How do I make a transparent border with CSS?
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http://www.researchkitchen.de/blog/archives/css-bordercolor-transparent.php
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How to write very long string that conforms with PEP8 and prevent E501
...t will result in a tuple, not a string. ;)
– bugmenot123
Sep 18 '15 at 13:00
7
Isn't adding the +...
Change URL parameters
...le.net/Draven/tTPYL/1 The URL would look like http://www.domain.com/index.php?action=my_action&view-all=Yes and I need to change the "view-all" value. My SO question that was closed: stackoverflow.com/questions/13025880/…
– Draven
Oct 25 '12 at 6:43
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Is there a Sleep/Pause/Wait function in JavaScript? [duplicate]
...avaScript function that simulates the operation of the sleep function in PHP — a function that pauses code execution for x milliseconds, and then resumes where it left off?
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Ajax tutorial for post and get [closed]
...Id = $("ul.nav").first().attr("id");
var request = $.ajax({
url: "script.php",
type: "POST",
data: {id : menuId},
dataType: "html"
});
request.done(function(msg) {
$("#log").html( msg );
});
request.fail(function(jqXHR, textStatus) {
alert( "Request failed: " + textStatus );
});
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How to get time in milliseconds since the unix epoch in Javascript? [duplicate]
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This would bomb out in php where you would need to do (new DateTime)->format('U') but js is ok without the parens
– chiliNUT
Aug 29 '17 at 2:38
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Laravel 4: how to “order by” using Eloquent ORM [duplicate]
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