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Creating an abstract class in Objective-C
...as abstract, just don't use it without subclassing it. There is no compile-time enforcement that prevents instantiation of an abstract class, however. In fact, there is nothing to stop a user from providing implementations of abstract methods via a category (i.e. at runtime). You can force a user to...
Set value for particular cell in pandas DataFrame using index
...ataframe, so
df['x']['C'] = 10
modifies df itself.
Warning: It is sometimes difficult to predict if an operation returns a copy or a view. For this reason the docs recommend avoiding assignments with "chained indexing".
So the recommended alternative is
df.at['C', 'x'] = 10
which does m...
How to concatenate stdin and a string?
...y useful in cases you are performing calls to functions which takes a long time to complete and want to be continuously updated about the output of the function.
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How to compare binary files to check if they are the same?
...ntu Linux) to know if two binary files are the same or not (except for the time stamps)? I do not need to actually extract the difference. I just need to know whether they are the same or not.
...
How is AngularJS different from jQuery
... jQuery can do the same (independence), but, indeed, AngularJS, as several times mentioned within the above lines, has independence in the most excellent possible structurally MVC-Based way.
A last note is that, there is no war of Names, since it is far disturbing to be biased, or subjective. jQue...
Xcode duplicate line
...2.1
Instruction
Give permissions to edit the following files. Most of the time OS will not allow you to edit the files.
for 11.3.1 version
sudo chmod 666 /Applications/Xcode.app/Contents/Frameworks/IDEKit.framework/Versions/A/Resources//IDETextKeyBindingSet.plist
sudo chmod 777 /Applications/Xcod...
Which comment style should I use in batch files?
... very inexplicable errors (in this case "\Microsoft was unexpected at this time"). You don't even need | or > in your expression. A :: is not a real comment, REM is, though.
– Abel
Sep 28 '17 at 1:06
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Creating a range of dates in Python
...
Marginally better...
base = datetime.datetime.today()
date_list = [base - datetime.timedelta(days=x) for x in range(numdays)]
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List of lists into numpy array
...y for a while, and found this behavior non-trivial. Thanks for taking the time to explain this more general case.
– Adam Hughes
Oct 29 '14 at 0:07
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How can I get dict from sqlite query?
...vely support the dictionary API as well). But use the Row object all other times.
def dict_from_row(row):
return dict(zip(row.keys(), row))
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