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Initialising an array of fixed size in python [duplicate]
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Do this:
>>> d = [ [ None for y in range( 2 ) ] for x in range( 2 ) ]
>>> d
[[None, None], [None, None]]
>>> d[0][0] = 1
>>> d
[[1, None], [None, None]]
The other solutions will lead to this kind of problem:
>>> d = [ [ N...
How to install a previous exact version of a NPM package?
...ion, an exact version will be installed. If you specify a semantic version range, then you might get a non-exact match. There's nothing unique about the install command in that respect.
– Bret Copeland
Jun 20 '15 at 18:49
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Polymorphism in C++
... inside templates or macros), we're trying to support an arbitrarily large range of types but often want to express operations on them in terms of other functions, literals and operations that were designed for a small set of types. It reduces the need to create near-identical functions or data on ...
NumPy array initialization (fill with identical values)
...y_fill, empty_colon, ones_times, repeat, tile, full, list_to_array],
n_range=[2 ** k for k in range(27)],
xlabel="len(a)",
logx=True,
logy=True,
)
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Is there a predefined enumeration for Month in the .NET library?
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return Enumerable.Range(0, 11) .Select(m => new {Id = month + 1, Name = DateTimeFormatInfo.CurrentInfo.MonthNames[month] });
– Keith Harrison
Nov 15 '13 at 15:15
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Make an image width 100% of parent div, but not bigger than its own width
...he div (like 200px wide) then it shouldn't be too hard to give the image a range to fill. But if you put a 20x20 pixel image in a 200x300 pixel box it will still be distorted.
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MySQL Data - Best way to implement paging?
...ge of large OFFSETs. They avoid using OFFSET with a variety of techniques, ranging from id range selections in the WHERE clause, to some kind of caching or pre-computing pages.
There are suggested solutions at Use the INDEX, Luke:
"Paging Through Results".
"Pagination done the right way".
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Create a date from day month and year with T-SQL
...st and simplest. And it does not throw an error when day values are out of range either. Altho depending on the circumstance, an error may be desired, so just be aware that this silences day and month values that are out of expected range.
– Shawn Kovac
May 7 '...
Why does Double.NaN==Double.NaN return false?
I was just studying OCPJP questions and I found this strange code:
9 Answers
9
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bool to int conversion
...se of such types (often declared using the identifier bit). On e.g. a mid-range PIC, if (bitVar1) bitVar2=1; would be two instructions; optimal coding for if (byteVar1) byteVar2=1; would be at least four (on many compilers, probably five). Such types can thus offer a major performance boost.
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