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What is the difference between concurrency, parallelism and asynchronous methods?
Concurrency is having two tasks run in parallel on separate threads. However, asynchronous methods run in parallel but on the same 1 thread. How is this achieved? Also, what about parallelism?
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When to use Hadoop, HBase, Hive and Pig?
... too huge.
Coming back to the first part of your question, Hadoop is basically 2 things: a Distributed FileSystem (HDFS) + a Computation or Processing framework (MapReduce). Like all other FS, HDFS also provides us storage, but in a fault tolerant manner with high throughput and lower risk of data ...
Convert int to string?
...compile time, but it wouldn't even raise a runtime exception it would just allow bad data.
– Timothy Gonzalez
Dec 15 '16 at 16:29
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How to convert date to timestamp?
...(YYYY-MM-DD), which is guaranteed to be understood by Date(), and is, generally speaking, the most interoperable format for date strings.
– Walter Tross
Dec 4 '14 at 13:54
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How do I step out of a loop with Ruby Pry?
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To exit Pry unconditionally, type
exit-program
Edit from @Nick's comment: Also works:
!!!
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CSS endless rotation animation
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Am I correct in understanding this is not theoretically perfect since the non-vendor-prefixed properties should always be last so as not to override standards-compliant behavior? See: css-tricks.com/ordering-css3-properties
– user657199
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Can I force pip to reinstall the current version?
... a current version of a package seems not to be working and requires reinstallation. But pip install -U won't touch a package that is already up-to-date. I see how to force a reinstallation by first uninstalling (with pip uninstall ) and then installing, but is there a way to simply force an "upd...
Under what conditions is a JSESSIONID created?
...s created/sent when session is created. Session is created when your code calls request.getSession() or request.getSession(true) for the first time. If you just want to get the session, but not create it if it doesn't exist, use request.getSession(false) -- this will return you a session or null. In...
Remove new lines from string and replace with one empty space
Want to remove all new lines from string.
19 Answers
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REST HTTP status codes for failed validation or invalid duplicate
...of issue. The only other alternative is 422 Unprocessable Entity. It actually comes from WebDav but it is perfectly valid to reuse any status code that has been registered with IANA.
– Darrel Miller
Jul 20 '10 at 19:38
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