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NameError: global name 'unicode' is not defined - in Python 3
I am trying to use a Python package called bidi. In a module in this package (algorithm.py) there are some lines that give me error, although it is part of the package.
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Run a callback only if an attribute has changed in Rails
...omething
# ...
end
end
This utilizes the fact that the before_save callback can conditionally execute based on the return value of a method call. The status_id_changed? method comes from ActiveModel::Dirty, which allows us to check if a specific attribute has changed by simply appending _cha...
Private vs Public in Cache-Control
Can you please describe an example indicating difference between Public and Private Cache-Control in asp.net applications hosted in IIS.
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Rails 3: I want to list all paths defined in my rails application
...ed helper path functions (that are created from routes) in my rails 3 application, if that is possible.
5 Answers
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Python memory usage of numpy arrays
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You can 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()) — Cargo cult or some crazy “language special case”?
...n by a consultant, and while dozens of red flags have already popped up, I can'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 cache, 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 can I convert a file pointer ( FILE* fp ) to a file descriptor (int fd)?
I have a FILE * , returned by a call to fopen() . I need to get a file descriptor from it, to make calls 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 case 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 can I alter a primary key constraint using SQL syntax?
...t wasn't clear, or anyone else makes the same mistake, the constraint name can'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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