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Many-to-many relationship with the same model in rails?

...documentation on the subject. There's a section called “Many-to-many”, and of course the documentation on the class methods themselves. Simplest scenario, uni-directional, no additional fields This is the most compact in code. I'll start out with this basic schema for your posts: create_tabl...
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file_get_contents(“php://input”) or $HTTP_RAW_POST_DATA, which one is better to get the body of JSON

...ST data. It is a less memory intensive alternative to $HTTP_RAW_POST_DATA and does not need any special php.ini directives. php://input is not available with enctype="multipart/form-data". Reference: http://php.net/manual/en/wrappers.php.php ...
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What GRANT USAGE ON SCHEMA exactly do?

...missions to the db role that must access the database from my php scripts, and I have a curiosity: if I execute 3 Answers ...
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dplyr: “Error in n(): function should not be called directly”

... I presume you have dplyr and plyr loaded in the same session. dplyr is not plyr. ddply is not a function in the dplyr package. Both dplyr and plyr have the functions summarise/summarize. Look at the results of conflicts() to see masked objects. ...
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Java compile speed vs Scala compile speed

I've been programming in Scala for a while and I like it but one thing I'm annoyed by is the time it takes to compile programs. It's seems like a small thing but with Java I could make small changes to my program, click the run button in netbeans, and BOOM, it's running, and over time compiling in ...
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ExecutorService, how to wait for all tasks to finish

... if asked.) This avoids all the manual shutdown, awaitTermination, etc... and allows you to reuse this ExecutorService neatly for multiple cycles, if desired. There are a few related questions on SO: How to wait for all threads to finish Return values from java threads invokeAll() not willing to...
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Resharper- Find all unused classes

...w to find unused references of a single file by right clicking on the file and selecting the "Find Usages" option. Is there any way I can see or get the list of all the unused classes or files in my project ? ...
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What is a reasonable order of Java modifiers (abstract, final, public, static, etc.)?

...ge order of the modifiers is mentioned in the Java Language Specification (and not the Java Virtual Machine Specification) e.g. for class modifiers you will find the following definition (extract): ClassModifiers: ClassModifier ClassModifiers ClassModifier ClassModifier: one of Annotat...
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How to resolve “Error: bad index – Fatal: index file corrupt” when using Git

After git init , I added and committed a few files, made some changes, added and committed. Set up the git daemon (running under Cygwin on WinXP) and cloned the repository once. Now, I get this error with the cloned repository: ...
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ng-repeat :filter by single field

I have an array of products that I'm repeating over using ng-repeat and am using 12 Answers ...