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Difference between and

... get submitted. Sample HTML form (index.html): <form action="checkout.php" method="POST"> <!-- this won't get submitted despite being named --> <input type="button" name="button1" value="a button"> <!-- this one does; so the input's TYPE is important! --> <inpu...
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How to use Git Revert

...vert makes a new commit git revert simply creates a new commit that is the opposite of an existing commit. It leaves the files in the same state as if the commit that has been reverted never existed. For example, consider the following simple example: $ cd /tmp/example $ git init Initialized empty G...
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How can I count all the lines of code in a directory recursively?

We've got a PHP application and want to count all the lines of code under a specific directory and its subdirectories. We don't need to ignore comments, as we're just trying to get a rough idea. ...
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How does Access-Control-Allow-Origin header work?

...ntrol-Allow-Origin is a CORS (Cross-Origin Resource Sharing) header. When Site A tries to fetch content from Site B, Site B can send an Access-Control-Allow-Origin response header to tell the browser that the content of this page is accessible to certain origins. (An origin is a domain, plus a sch...
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Why is nginx responding to any domain name?

...static, see Oleg Neumyvkin's answer - if you have multiple config files in sites-available, then the first server in the first file by alphabetical order is your default. I suspect this might be an issue. Also, many distributions run an 'nginx -t' to test the config before restarting - you may hav...
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PHP regular expressions: No ending delimiter '^' found in

... PHP regex strings need delimiters. Try: $numpattern="/^([0-9]+)$/"; Also, note that you have a lower case o, not a zero. In addition, if you're just validating, you don't need the capturing group, and can simplify the rege...
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Detect Click into Iframe using JavaScript

... The above script is used by me to detect clicks away from my site. Most advertising networks now serve banners in frames. If you click one and then quickly another one before you left on the first click, technically I want to know the last click that you actually left on. So in my case...
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Count lines of code in all java classes in Android Studio

...General Usage Instructions Install plugin from official Jetbrains plugin site, After installing, just click on the TAB "Statistic" at the bottom of the screen (left side), Click "Refresh" button to run statistic for whole project, Click "Refresh on selection" button to run statistic for selected d...
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How do I create a comma-separated list from an array in PHP?

...ut it's always a pain having to take off the final comma. Is there an easy PHP way of doing it? 12 Answers ...
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PHP variables in anonymous functions

I was playing around with anonymous functions in PHP and realized that they don't seem to reach variables outside of them. Is there any way to get around this problem? ...