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Best way to define error codes/strings in Java?

I am writing a web service in Java, and I am trying to figure out the best way to define error codes and their associated error strings . I need to have a numerical error code and an error string grouped together. Both the error code and error string will be sent to the client accessing the web ser...
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Redirect all to index.php using htaccess

...(the same place as index.php) or it'll only affect the sub-folder it's in (and any sub-folders within that - recursively). Next make a slight change to your rule so it looks something like: RewriteEngine on RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.*)$ ...
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Transaction isolation levels relation with locks on table

... I want to understand the lock each transaction isolation takes on the table For example, you have 3 concurrent processes A, B and C. A starts a transaction, writes data and commit/rollback (depending on results). B just executes a SELECT st...
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What do @, - and + do as prefixes to recipe lines in Make?

... They control the behaviour of make for the tagged command lines: @ suppresses the normal 'echo' of the command that is executed. - means ignore the exit status of the command that is executed (normally, a non-zero exit status would stop that part of the build). + means 'execut...
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Difference between abstract class and interface in Python

What is the difference between abstract class and interface in Python? 8 Answers 8 ...
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Microsoft Excel mangles Diacritics in .csv files?

...F8 capable will read the bytes as some other encoding such as Windows-1252 and display the characters  at the start of the file. There is a known bug where Excel, upon opening UTF8 CSV files via file association, assumes that they are in a single-byte encoding, disregarding the presence of th...
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An ASP.NET setting has been detected that does not apply in Integrated managed pipeline mode

I Installed DotNetOpenAuth SDK-3.4.5.10201.vsix and I can't get it working. It works locally (when I run as localhost) but when i try to publish it ain't working. ...
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Internet Explorer 11 detection

...t && !!document.documentMode; // true on IE11 // false on Edge and other IEs/browsers. Original Answer In order to check Ie11 , you can use this : ( tested) (or run this) !(window.ActiveXObject) && "ActiveXObject" in window I have all VMS of IE : Notice : this w...
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Difference between jQuery `click`, `bind`, `live`, `delegate`, `trigger` and `on` functions (with an

...list of events up in another page, the API itself is tremendously helpful, and all of what I'm discussing below is linked directly from this page. First, .click(function) is literally a shortcut for .bind('click', function), they are equivalent. Use them when binding a handler directly to an eleme...
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What exactly is LLVM?

... LLVM is a library that is used to construct, optimize and produce intermediate and/or binary machine code. LLVM can be used as a compiler framework, where you provide the "front end" (parser and lexer) and the "back end" (code that converts LLVM's representation to actual machi...