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Truncate a list to a given number of elements
... a list--for example to the first 100 elements--discarding the others (without iterating through individual elements)?
3 An...
How to install both Python 2.x and Python 3.x in Windows
...est: open up commmand prompt and type python2 ....BOOM! Python 2.7.6. exit out.
Test: open up commmand prompt and type python3 ....BOOM! Python 3.4.3. exit out.
Note: (so as not to break pip commands in step 4 and 5, keep copy of python.exe in the same directory as the renamed file)
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What are unit tests, integration tests, smoke tests, and regression tests?
...arrow and well defined scope. Complex dependencies and interactions to the outside world are stubbed or mocked.
Integration test: Test the correct inter-operation of multiple subsystems. There is whole spectrum there, from testing integration between two classes, to testing integration with the prod...
Paste multiple times
... biggest mental switch I've needed to make when moving to Vim is to figure out how to apply group edits sequentially. I.e. rather than doing a bunch of edits on a line and then doing a bunch of the same edits on another line, I'll do the first edit on a bunch of lines (using . to great effect), the...
Interface defining a constructor signature?
...rue @Skarlot, it's not a silver bullet solution. In the problem you point out though, hopefully it would make sense to directly modify the abstract class that you are already inheriting. But there are still situations where that isn't possible and/or appropriate, so a deeper design pattern would b...
Database sharding vs partitioning
I have been reading about scalable architectures recently. In that context, two words that keep on showing up with regards to databases are sharding and partitioning . I looked up descriptions but still ended up confused.
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AtomicInteger lazySet vs. set
...methods of AtomicInteger ? The documentation doesn't have much to say about lazySet :
6 Answers
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Generator Expressions vs. List Comprehension
...st common reason to choose one over the other, my advice is to not worry about it and just pick one; if you find that your program is running too slowly, then and only then should you go back and worry about tuning your code.
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How to do two-way filtering in AngularJS?
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It turns out that there's a very elegant solution to this, but it's not well documented.
Formatting model values for display can be handled by the | operator and an angular formatter. It turns out that the ngModel that has not only a...
How to change the decimal separator of DecimalFormat from comma to dot/point?
...e.GERMANY);
double val = nf_in.parse(text).doubleValue();
NumberFormat nf_out = NumberFormat.getNumberInstance(Locale.UK);
nf_out.setMaximumFractionDigits(3);
String output = nf_out.format(val);
I.e. use the correct locale.
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