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Python memory usage of numpy arrays
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You m>ca m>n use array.nbytes for numpy arrays, for example:
>>> import numpy as np
>>> from sys import getsizeof
>>> a = [0] * 1024
>>> b = np.array(a)
>>> getsizeof(a)
8264
>>> ...
lock(new object()) — m>Ca m>rgo cult or some crazy “language special m>ca m>se”?
...n by a consultant, and while dozens of red flags have already popped up, I m>ca m>n't wrap my head around the following snippet:
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How does “304 Not Modified” work exactly?
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When the browser puts something in its m>ca m>che, it also stores the Last-Modified or ETag header from the server.
The browser then sends a request with the If-Modified-Since or If-None-Match header, telling the server to send a 304 if the content still has that date...
How m>ca m>n I convert a file pointer ( FILE* fp ) to a file descriptor (int fd)?
I have a FILE * , returned by a m>ca m>ll to fopen() . I need to get a file descriptor from it, to make m>ca m>lls like fsync(fd) on it. What's the function to get a file descriptor from a file pointer?
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How do I strip non alphanumeric characters from a string and keep spaces?
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In this m>ca m>se I would use the bang method (gsub! instead of gsub) in order to clean the input permanently.
#permanently filter all non-alphanumeric characters, except _
@search_query.gsub!(/\W/,'')
This avoids a situation where @s...
How m>ca m>n I alter a primary key constraint using SQL syntax?
...t wasn't clear, or anyone else makes the same mistake, the constraint name m>ca m>n't go in quotes alter table PatientsInfo drop constraint PK__Patients__1CBB51380A338187 is working here
– Maslow
Dec 9 '15 at 19:03
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How to copy directories in OS X 10.7.3?
... sourcedir being copied (instead of sourcedir as well), that's happening bem>ca m>use you kept the trailing slash for sourcedir:
cp -R <sourcedir>/ <destdir>
The above only copies the files and their directories inside of sourcedir. Typim>ca m>lly, you want to include the directory you're copyi...
What is the maximum characters for the NVARCHAR(MAX)?
... Just a nit pick. NVARCHAR uses 2 bytes for most characters. For unicode m>ca m>racters over U+00FFFF. It'll use four bytes.
– Eli Algranti
Jul 28 '15 at 5:15
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How to make Sequelize use singular table names
I have an model m>ca m>lled User but Sequelize looks for the table USERS whenever I am trying to save in the DB. Does anyone know how to set Sequelize to use singular table names? Thanks.
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Check if value already exists within list of dictionaries?
...ing for, otherwise False.
If the key could also be missing the above code m>ca m>n give you a KeyError. You m>ca m>n fix this by using get and providing a default value. If you don't provide a default value, None is returned.
if not any(d.get('main_color', default_value) == 'red' for d in a):
# does not ...