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Regex empty string or email

...ng or email (^$|^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.(?:[a-zA-Z]{2}|com|org|net|edu|gov|mil|biz|info|mobi|name|aero|asia|jobs|museum)$) matching empty string or email but also matching any amount of whitespace (^\s*$|^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.(?:[a-zA-Z]{2}|com|org|net|edu|gov|mil|biz|inf...
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Using braces with dynamic variable names in PHP

... from phpNET manual php.net/manual/ru/language.variables.variable.php $price_for_monday = 10; $price_for_tuesday = 20; $today = 'tuesday'; $price_for_today = ${ 'price_for_' . $today}; echo $price_for_today; // will return 20 ...
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Using jQuery to replace one tag with another

... children() won't work. Using contents() instead works perfectly. jsfiddle.net/7Yne9 – Jens Roland Aug 17 '11 at 13:31 ...
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How to insert a line break before an element using CSS

...e: $('<br />').insertBefore('#restart'); Example: http://jsfiddle.net/jasongennaro/sJGH9/1/ share | improve this answer | follow | ...
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Convert an image (selected by path) to base64 string

...l file's bytes, you have the bytes of the image as re-saved to gif by the .Net framework. – Nyerguds Jul 23 '19 at 15:03 ...
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Virtual Serial Port for Linux

...example in C++ using a Virtual Serial Port. I pushed the code into GitHub: https://github.com/cymait/virtual-serial-port-example . The code
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How to add a delay for a 2 or 3 seconds [closed]

... There is a 4th timer: System.Web.UI.Timer, an ASP.NET component that performs asynchronous or synchronous web page postbacks at a regular interval. – David Sep 28 '16 at 13:49 ...
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How do I get a PHP class constructor to call its parent's parent's constructor?

... Grandpa This is a feature not a bug, check this for your reference: https://bugs.php.net/bug.php?id=42016 It is just the way it works. If it sees it is coming from the right context this call version does not enforce a static call. Instead it will simply keep $this and be ha...
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Fastest way to implode an associative array with keys

...If not the alternative is to use a modified implode method such as uk2.php.net/manual/en/function.implode.php#84684 but http_build_query() will properly be faster. – Mark Davidson Jan 2 '09 at 21:11 ...
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How to compare DateTime in C#?

... current .NET version: msdn.microsoft.com/en-us/library/ff986512(v=vs.110).aspx – juFo Sep 21 '16 at 14:54 2 ...