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Java SecurityException: signer information does not match

...from directories since those AFAIK cannot be signed). So either make sure all JARs (or at least those which contain classes from the same packages) are signed using the same certificate, or remove the signatures from the manifest of JAR files with overlapping packages. ...
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Is it possible to install APK file if more than one emulators/devices are connected [duplicate]

I know how to install the apk file in to the emulator by command prompt and all that. But i want to know is it possible to install same apk file in to multiple emulator by giving any specific name ? Actually i have to test one apk file in to many device. and for that i have started many device. I kn...
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Rails server says port already used, how to kill that process?

...you're looking to kill whatever is on port 3000 (which is what webrick normally uses), type this in your terminal to find out the PID of the process: $ lsof -wni tcp:3000 Then, use the number in the PID column to kill the process: $ kill -9 PID ...
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What's the difference between Cache-Control: max-age=0 and no-cache?

... request without successful revalidation with the origin server. This allows an origin server to prevent caching even by caches that have been configured to return stale responses to client requests. In other words, caches may sometimes choose to use a stale response (although I belie...
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Remove Trailing Slash From String PHP

...Another (probably better) option would be using rtrim() - this one removes all trailing slashes: $string = rtrim($string, '/'); share | improve this answer | follow ...
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How to recognize swipe in all 4 directions

...mask, but each recognizer can only handle one direction. You can send them all to the same handler if you want, and sort it out there, or send them to different handlers. Here's one implementation: override func viewDidLoad() { super.viewDidLoad() let swipeRight = UISwipeGestureRecognizer(...
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Checkout subdirectories in Git?

...lace outside of the working copy) that I got used to just making lots of small single-purpose repositories. If you insist (or really need it), though, you could make a git repository with just mytheme and myplugins directories and symlink those from within the WordPress install. MDCore wrote: ...
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Expression Versus Statement

...as one unit of execution, a thing that you did. The only reason it wasn't called a "line" was because sometimes it spanned multiple lines. An expression on its own couldn't do anything... you had to assign it to a variable. 1 + 2 / X is an error in FORTRAN, because it doesn't do anything. You had...
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Making a Sass mixin with optional arguments

... A DRY'r Way of Doing It And, generally, a neat trick to remove the quotes. @mixin box-shadow($top, $left, $blur, $color, $inset:"") { -webkit-box-shadow: $top $left $blur $color #{$inset}; -moz-box-shadow: $top $left $blur $color #{$inset}; box-shad...
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Text border using css (border around text)

...e CSS3 text-shadow : text-shadow: 0 0 2px #fff; However it wont show in all browsers right away. Using a script library like Modernizr will help getting it right in most browsers though. share | ...