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Does C++ support 'finally' blocks? (And what's this 'RAII' I keep hearing about?)
...quired because of RAII.
RAII moves the responsibility of exception safety from the user of the object to the designer (and implementer) of the object. I would argue this is the correct place as you then only need to get exception safety correct once (in the design/implementation). By using finally ...
In C++, what is a “namespace alias”?
...t, shorter name.
As an example, say you wanted to use the numeric vectors from Boost's uBLAS without a using namespace directive. Stating the full namespace every time is cumbersome:
boost::numeric::ublas::vector<double> v;
Instead, you can define an alias for boost::numeric::ublas -- say ...
How update the _id of one MongoDB Document?
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Would a snapshot() on find be advised to keep the forEach from accidentally picking up newer docs as it iterates?
– John Flinchbaugh
May 14 '14 at 21:04
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Setup RSpec to test a gem (not Rails)
... How exactly do @mkon's three lines of code work differently from iain's three lines of code?
– Nakilon
Sep 25 '16 at 3:19
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Is there a common Java utility to break a list into batches?
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Check out Lists.partition(java.util.List, int) from Google Guava:
Returns consecutive sublists of a list, each of the same size (the final list may be smaller). For example, partitioning a list containing [a, b, c, d, e] with a partition size of 3 yields [[a, b, c], [...
How to set custom location for local installation of npm package?
...our user account.
In .npmrc:
prefix=${HOME}/npm
Then run this command from the command line:
npm config ls -l
It should give output on both your own local configuration and the global npm configuration, and you should see your local prefix configuration reflected, probably near the top of the...
Is Ruby pass by reference or by value?
...ays references to objects. In order to get an object that won't change out from under you, you need to dup or clone the object you're passed, thus giving an object that nobody else has a reference to. (Even this isn't bulletproof, though — both of the standard cloning methods do a shallow copy, so...
How to get the tag HTML with JavaScript / jQuery?
...t.querySelector("html");
And if you want to use jQuery to get attributes from it...
$(htmlElement).attr(INSERT-ATTRIBUTE-NAME);
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D3.js: what is 'g' in .append(“g”) D3.js code?
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I came here from a d3 learning curve as well. As already pointed out this is not specific to d3, it is specific to svg attributes. Here is a really good tutorial explaining the advantages of svg:g (grouping).
It is not that different f...
PHP best way to MD5 multi-dimensional array?
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Serialize is soooooooo much slower than json_encode from second answer. Do your server a pleasure and use json_encode! :)
– s3m3n
May 5 '13 at 17:19
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