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What is the proper way to check if a string is empty in Perl?
...== and != operators are numeric comparison operators. They will attempt to convert both operands to integers before comparing them.
See the perlop man page for more information.
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How can I see the entire HTTP request that's being sent by my Python application?
...requests/0.12.1'}
Then r.request.data has the body as a mapping. You can convert this with urllib.urlencode if they prefer:
import urllib
b = r.request.data
encoded_body = urllib.urlencode(b)
depending on the type of the response the .data-attribute may be missing and a .body-attribute be there...
What does the `#` operator mean in Scala?
... such a subclass. In other words, there's no A.B class, but there are a1.B and a2.B classes, and they are different classes, as the error message is telling us above.
If you did not understand that, look up path dependent types.
Now, # makes it possible for you to refer to such nested classes with...
Pandas every nth row
...d use iloc, which takes a row/column slice, both based on integer position and following normal python syntax.
df.iloc[::5, :]
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How do I add a Maven dependency in Eclipse?
...oject. Before step 5, you must right-click project--> configure --> convert to Maven project. Then step 5 will work.
– cliff2310
Jun 16 '18 at 1:42
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Lambda Expression and generic method
...incompatible types: java.util.Comparator<java.lang.String> cannot be converted to MyComparable and MyComparable is not generic (no type) so (MyComparable<String>) would not work either
– user85421
Sep 20 '18 at 13:00
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UITableViewCell, show delete button on swipe
...ton to show when swiping on a UITableViewCell ? The event is never raised and the delete button never appears.
18 Answers
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MySQL CONCAT returns NULL if any field contain NULL
...
convert the NULL values with empty string by wrapping it in COALESCE
SELECT CONCAT(COALESCE(`affiliate_name`,''),'-',COALESCE(`model`,''),'-',COALESCE(`ip`,''),'-',COALESCE(`os_type`,''),'-',COALESCE(`os_version`,'')) AS dev...
Static methods in Python?
...should only be used if you have to support ancient versions of Python (2.2 and 2.3)
class MyClass(object):
def the_static_method(x):
print(x)
the_static_method = staticmethod(the_static_method)
MyClass.the_static_method(2) # outputs 2
This is entirely identical to the first exampl...
Python “raise from” usage
What's the difference between raise and raise from in Python?
1 Answer
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