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Storing time-series data, relational or non?
... Could you explain how the table is "de-normalised" ? Marcus does have an error in the table, but it is not a normalisation error.
– PerformanceDBA
Feb 3 '11 at 9:25
...
Why was “Avoid Enums Where You Only Need Ints” removed from Android's performance tips?
...num. But that's not an Android-specific tip, and it's a really rare design error anyway.
– Elliott Hughes
Jan 22 '12 at 22:57
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Difference between numpy.array shape (R, 1) and (R,)
...ame issue also occurs column-wise). We will get matrices are not aligned error since M[:,0] is in shape (R,) but numpy.ones((1, R)) is in shape (1, R) .
...
Difference between private, public, and protected inheritance
...t.
If we compile the following code, we will get nothing but compilation errors saying that put and get methods are inaccessible. Why?
When we omit the visibility specifier, the compiler assumes that we are going to apply the so-called private inheritance. It means that all public superclass comp...
How do the likely/unlikely macros in the Linux kernel work and what is their benefit?
...
These macros mostly were used for error checking. Because error leaves less probably then normal operation. A few people make profiling or calculation to decide most used leaf...
– gavenkoa
May 4 '12 at 21:12
...
Should operator
...("w1");
Widget w2("w2");
// These two won't work
{
// Error: operand types are std::ostream << std::ostream
// cout << w1.operator<<(cout) << '\n';
// Error: operand types are std::ostream << Widget
// cout << w1 <&...
When should I write the keyword 'inline' for a function/method?
...ugh. As a rule, guessing what would would be improved by inlining is very error prone. The exception to that rule being one liners.
– deft_code
Aug 15 '11 at 18:50
5
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What are the differences between type() and isinstance()?
...g)
return treatasscalar(x)
try:
return treatasiter(iter(x))
except TypeError:
return treatasscalar(x)
You could say that basestring is an Abstract Base Class ("ABC")—it offers no concrete functionality to subclasses, but rather exists as a "marker", mainly for use with isinstance. The conc...
How to Update Multiple Array Elements in mongodb
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this code returns ERROR in pymongo. tehre is error: raise TypeError("%s must be True or False" % (option,)) TypeError: upsert must be True or False
– Vagif
Jun 8 at 12:05
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Header files for x86 SIMD intrinsics
...s), rather than having its own header.
Some compilers will still generate error messages if you use intrinsics for instruction-sets you haven't enabled (e.g. _mm_fmadd_ps without enabling fma, even if you include immintrin.h and enable AVX2).
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