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How to retrieve an element from a set without removing it?
Suppose the following:
12 Answers
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How can I pass command-line arguments to a Perl program?
I'm working on a Perl script. How can I pass command line parameters to it?
9 Answers
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The Guava library: What are its most useful and/or hidden features? [closed]
...itten three articles about classes on Google Guava:
Using CheckedFuture: http://blog.firdau.si/2010/07/07/guava-using-checkedfuture/
Using ListenableFuture: http://blog.firdau.si/2010/07/05/guava-using-listenablefuture/
ComputingMap on Google Collection (now Guava) http://blog.firdau.si/2009/11/13...
How to measure code coverage in Golang?
... coverage results:
One major new feature of go test is that it can now compute and, with help from a new, separately installed "go tool cover" program, display test coverage results.
The cover tool is part of the go.tools subrepository. It can be installed by running
$ go get golang.org/x...
Why are there no ++ and -- operators in Python?
...mixes together statements and expressions, which is not good practice. See http://norvig.com/python-iaq.html
It generally encourages people to write less readable code
Extra complexity in the language implementation, which is unnecessary in Python, as already mentioned
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How to execute multi-line statements within Python's own debugger (PDB)
...eUploader: {
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error: Unable to find vcvarsall.bat
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You can install compiled version from http://www.lfd.uci.edu/~gohlke/pythonlibs/
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Fastest way to check if a value exists in a list
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TransactionManagementError “You can't execute queries until the end of the 'atomic' block” while usi
...nsaction.TransactionManagementError exception.
Like caio mentioned in the comments, the solution is to capture your exception with transaction.atomic like:
from django.db import transaction
def test_constraint(self):
try:
# Duplicates should be prevented.
with transaction.atomi...
Iterate an iterator by chunks (of n) in Python? [duplicate]
...rn
yield itertools.chain((first_el,), chunk_it)
Some benchmarks: http://pastebin.com/YkKFvm8b
It will be slightly more efficient only if your function iterates through elements in every chunk.
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