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OSGi: What are the differences between Apache Felix and Apache Karaf?
Apache Karaf is a sub project of Apache Felix . It is defined as "a lightweight OSGi container".
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How to get the class of the clicked element?
I can't figure it out how to get the class value of the clicked element.
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Why is JsonRequestBehavior needed?
Why is Json Request Behavior needed?
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How to move a git repository into another directory and make that directory a git repository?
I have a directory gitrepo1 . This directory is a git repository.
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Ruby on Rails: getting the max value from a DB column
Currently I can make the straight-up SQL query on my DB:
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In which situations do we need to write the __autoreleasing ownership qualifier under ARC?
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_=> what does this underscore mean in Lambda expressions?
What does an lambda expression like _=> expr mean?
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Rails how to run rake task
How do I run this rake file in terminal/console?
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How to access a preexisting collection with Mongoose?
I have a large collection of 300 question objects in a database test . I can interact with this collection easily through MongoDB's interactive shell; however, when I try to get the collection through Mongoose in an express.js application I get an empty array.
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“Insert if not exists” statement in SQLite
I have an SQLite database. I am trying to insert values ( users_id , lessoninfo_id ) in table bookmarks , only if both do not exist before in a row.
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