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How do I tell matplotlib that I am done with a plot?
...t tutorial does mention clf() in the "multiple figures" section. Note that if you just create a new plot with figure() without closing the old one with close() (even if you close the GUI window), pyplot retains a reference to your old figure, which may look like a memory leak.
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How to sum up an array of integers in C#
...is worth noting that this will get raise an error System.OverflowException if the result would be greater than you can fit in a signed 32 bit integer (i.e. (2^31) -1 or in english ~ 2.1 billion).
– ChrisProsser
Mar 14 '15 at 20:15
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Asynchronous shell commands
I'm trying to use a shell script to start a command. I don't care if/when/how/why it finishes. I want the process to start and run, but I want to be able to get back to my shell immediately...
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How to export revision history from mercurial or git to cvs?
...hinking of using git or mercurial but we could use another distributed vcs if it could make the export easier.
3 Answers
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ruby system command check exit code
... want to check their exit codes simultaneously so that my script exits out if that command fails.
5 Answers
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Why do objects of the same class have access to each other's private data?
...way.
Some hints of per-object control are present in protected access specification, which is why it even has its own dedicated chapter in the standard (11.5). But still any per-object features described there are rather rudimentary. Again, access control in C++ is meant to work on per-class basis....
Case insensitive searching in Oracle
... versions older than 10gR2 it can't really be done and the usual approach, if you don't need accent-insensitive search, is to just UPPER() both the column and the search expression.
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Is there shorthand for returning a default value if None in Python? [duplicate]
In C#, I can say x ?? "" , which will give me x if x is not null, and the empty string if x is null. I've found it useful for working with databases.
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Mongo: find items that don't have a certain field
...e using $exists:
db.things.find( { a : { $exists : false } } ); // return if a is missing
When is true, $exists matches the documents that contain the field, including documents where the field value is null. If is false, the query returns only the documents that do not contain the field.
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How can I check if an ip is in a network in Python?
Given an ip address (say 192.168.0.1), how do I check if it's in a network (say 192.168.0.0/24) in Python?
27 Answers
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