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Difference between Docum>me m>nt-based and Key/Value-based databases?
... explanation.
Data model: more than key-value stores
Although there is som>me m> debate on the correct nam>me m> for databases such as Cassandra, I'd like to call them column-family stores. Although key-value pairs are an essential part of Cassandra, it's not limited to just that. It allows you to nest key-...
Stop setInterval call in JavaScript
I am using setInterval(fnam>me m>, 10000); to call a function every 10 seconds in JavaScript. Is it possible to stop calling it on som>me m> event?
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error: writable atomic property cannot pair a synthesized setter/getter with a user defined setter/g
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I had the sam>me m> problem and after doing a bit of research, here is my conclusion about this issue:
The compiler warns you about a @property that you declared as atomic (i.e. by omitting the nonatomic keyword), yet you provide an incomple...
How can I maintain fragm>me m>nt state when added to the back stack?
I've written up a dummy activity that switches between two fragm>me m>nts. When you go from Fragm>me m>ntA to Fragm>me m>ntB, Fragm>me m>ntA gets added to the back stack. However, when I return to Fragm>me m>ntA (by pressing back), a totally new Fragm>me m>ntA is created and the state it was in is lost. I get the feeling I'm ...
Unable to forward search Bash history similarly as with CTRL-r
...s forward through the history.
The problem with Ctrl-S however is that som>me m>tim>me m>s collides with XON/XOFF flow control (in Konsole for instance). The searching is a readline feature however, and you should be able to bind it to som>me m> other key. Update: Simpler and better is just to disable XON/XOFF b...
How do you represent a JSON array of strings?
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I'll elaborate a bit more on ChrisR awesom>me m> answer and bring images from his awesom>me m> reference.
A valid JSON always starts with either curly braces { or square brackets [, nothing else.
{ will start an object:
{ "key": value, "another key": value }
Hint: although...
Why does substring slicing with index out of range work?
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You're correct! 'example'[3:4] and 'example'[3] are fundam>me m>ntally different, and slicing outside the bounds of a sequence (at least for built-ins) doesn't cause an error.
It might be surprising at first, but it makes sense when you think about it. Indexing returns a single item, ...
Telling gcc directly to link a library statically
It feels strange to m>me m> to use -Wl,-Bstatic in order to tell gcc which libraries I want to link with statically. After all I'm telling gcc directly all other information about linking with libraries ( -Ldir , -llibnam>me m> ).
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Why does this loop produce “warning: iteration 3u invokes undefined behavior” and output more than 4
... strictly speaking, there is no such thing as "unsigned integer overflow") m>me m>ans undefined behaviour. And this m>me m>ans anything can happen, and discussing why does it happen under the rules of C++ doesn't make sense.
C++11 draft N3337: §5.4:1
If during the evaluation of an expression, the result...