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Group by with multiple columns using lambda
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If my 'source' variable is a Dictionary Collection this not work. Suggestions?
– Joao Paulo
Oct 15 '15 at 13:32
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What do single quotes do in C++ when used on multiple characters?
...ntended to be a convenient way to write some constants, but unfortunately different compilers have been interpreting it differently, so nowadays most coding styles discourage its use.
– chys
Sep 18 '11 at 8:52
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How to create empty text file from a batch file?
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@Reegan If you used echo 2 without the ., the console would read "ECHO is off." Using echo. 2 effectively silences console output by only displaying a newline.
– OneManBand
Nov 19 '14 at 19:28
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What's the correct way to convert bytes to a hex string in Python 3?
...e binascii module:
>>> import binascii
>>> binascii.hexlify('foo'.encode('utf8'))
b'666f6f'
>>> binascii.unhexlify(_).decode('utf8')
'foo'
See this answer:
Python 3.1.1 string to hex
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Best way to unselect a in jQuery?
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OR .val(['']) to select the empty value if any.
– Mark
Mar 12 '15 at 11:15
2
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How to delete last character from a string using jQuery?
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To clarify things up (as this post might be useful mostly for beginners) : .slice() will return the result. So one should use : var result = "1234".slice(0,-1);
– MMB
Jul 24 '18 at 17:17
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Python: access class property from string [duplicate]
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x = getattr(self, source) will work just perfectly if source names ANY attribute of self, including the other_data in your example.
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Create boolean column in MySQL with false as default value?
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You have to specify 0 (meaning false) or 1 (meaning true) as the default. Here is an example:
create table mytable (
mybool boolean not null default 0
);
FYI: boolean is an alias for tinyint(1).
Here is the proof:
mysql> create ...
PHP - add item to beginning of associative array [duplicate]
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Which is more efficient? union or array_merge? If I may ask...
– Melvin
Jun 14 '13 at 6:34
3
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How to upgrade R in ubuntu? [closed]
...hatever version of Ubuntu you are using (eg, trusty/, xenial/, and so on). If you're getting a "Malformed line error", check to see if you have a space between /ubuntu/ and version/.
Fetch the secure APT key:
gpg --keyserver keyserver.ubuntu.com --recv-key E084DAB9
or
gpg --hkp://keyserver keyse...