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std::vector versus std::array in C++
... should one be preferred over another? What are the pros and cons of each? All my textbook does is list how they are the same.
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JSON.parse vs. eval()
... and json.parse just parses JSON whereas eval would leave the door open to all JS expressions.
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Reading GHC Core
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GHC Core is the System FC language into which all Haskell is translated. The (approximate) grammar for Core is given by:
Core is closely related to the simpler and better known System F. All transformations GHC does on the Core level are type-preserving refactorings o...
When to add what indexes in a table in Rails
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Should I add "index" to all the foreign keys like "xxx_id"?
It would be better, because it accelerates the search in sorting in this column. And Foreign keys are something searched for a lot.
Since Version 5 of rails the index will be created aut...
RegEx to parse or validate Base64 data
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The simplest solution would be to strip out all whitespace (which is ignored as per the RFC) before validation.
– Ben Blank
Jan 24 '09 at 1:35
2
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Indentation in Go: tabs or spaces?
...preferred for indentation in Go source code? If not, what is the (statistically) more popular option?
2 Answers
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Grep not as a regular expression
...as grep -F. Direct invocation as fgrep is
deprecated, but is provided to allow historical applications that rely
on them to run unmodified.
For the complete reference, check:
https://www.gnu.org/savannah-checkouts/gnu/grep/manual/grep.html
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How to exclude specific folders or files from validation in Eclipse?
...lder
Click Resource, ResourceFilters
Click "Add"
Set the following Exclude All, Files and Folders, All Children, add an asterisk (*) to the File and Folder Attributes input field (highlighted in the image below)
Note: In Eclipse Indigo you have to Right click the folder and select properties and t...
Filter git diff by type of change
...de) changed
U Unmerged
X Unknown
B have had their pairing Broken
* All-or-none
Any combination of the filter characters may be used.
When * (All-or-none) is added to the combination, all paths are
selected if there is any file that matches other criteria in the
comparison; ...
np.mean() vs np.average() in Python NumPy?
...verage
np.mean:
try:
mean = a.mean
except AttributeError:
return _wrapit(a, 'mean', axis, dtype, out)
return mean(axis, dtype, out)
np.average:
...
if weights is None :
avg = a.mean(axis)
scl = avg.dtype.type(a.size/avg.size)
else:
#code that does weighted mean here
if retu...