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What is so bad about singletons? [closed]
...it to testing since you can end up with a situation where tests need to be ordered which is a big no no for unit tests. Why? Because each unit test should be independent from the other.
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Why do you need to invoke an anonymous function on the same line?
...de will not "leak" outside the scope. This is very useful in JavaScript in order not to pollute the global scope.
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Android 4.3 Bluetooth Low Energy unstable
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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Apache Spark: map vs mapPartitions?
...lize(List("dog", "salmon", "salmon", "rat", "elephant"), 3)
val b = a.map(_.length)
val c = a.zip(b)
c.collect
res0: Array[(String, Int)] = Array((dog,3), (salmon,6), (salmon,6), (rat,3), (elephant,8))
mapPartitions
This is a specialized map that is called only once for each partition.
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C/C++ Struct vs Class
...elopers. I like the struct keyword for classes that merely hold data in an ordered fashion but not provide (much) logic themselves.
– ypnos
May 1 '10 at 14:30
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What is the difference between a framework and a library?
...amework embodies some abstract
design, with more behavior built in.
In order to use it you need to insert
your behavior into various places in
the framework either by subclassing or
by plugging in your own classes. The
framework's code then calls your code
at these points.
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How to move certain commits to be based on another branch in git?
...in case anyone is struggling, you have to cherry-pick in the chronological order that your commits were applied.)
– carmenism
Sep 6 '16 at 13:49
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What database does Google use?
...Web page" or "delete cells that are older than a specific date/time."
In order to manage the huge tables, Bigtable splits tables at row boundaries and saves them as tablets. A tablet is around 200 MB, and each machine saves about 100 tablets. This setup allows tablets from a single table to be spr...
NSDefaultRunLoopMode vs NSRunLoopCommonModes
...eeds to respond to incoming events, it should be attached to a run loop in order to wake up the thread when new events arrive. This is the case of NSURLConnection generated threads, as they only wake on incoming events (from the network).
Each thread can be associated to multiple run loops, or can ...
Are there any SHA-256 javascript implementations that are generally considered trustworthy?
...ssword becomes irrelevant. An attacker needs only to intercept the hash in order to impersonate the user, and if that hash is stored unmodified on the server, then the server is storing the true password (the hash) in plain-text.
So your security is now worse because you decided add your own improv...