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How to limit the maximum value of a numeric field in a Django model?
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In Django 1.7 setting null=True and blank=True works as expected. The field is optional and if it's left blank it's stored as null.
– Tim Tisdall
May 24 '17 at 13:38
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'git status' shows changed files, but 'git diff' doesn't
...I was able to fix this problem by adding all files to the index and then resetting the index.
git add -A
git reset
core.filemode was set to false.
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npm ERR cb() never called
...ode.js app hosted on Heroku. Every time I do a git push heroku I get the following error:
39 Answers
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Shell script to delete directories older than n days
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How to add leading zeros?
I have a set of data which looks something like this:
8 Answers
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How can building a heap be O(n) time complexity?
...than O(n log n)?
How do you implement buildHeap so it runs in O(n) time?
Often, answers to these questions focus on the difference between siftUp and siftDown. Making the correct choice between siftUp and siftDown is critical to get O(n) performance for buildHeap, but does nothing to help one under...
Unicode equivalents for \w and \b in Java regular expressions?
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How do I loop through a list by twos? [duplicate]
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You can use for in range with a step size of 2:
Python 2
for i in xrange(0,10,2):
print(i)
Python 3
for i in range(0,10,2):
print(i)
Note: Use xrange in Python 2 instead of range because it is more efficient as it generates an...
Quick-and-dirty way to ensure only one instance of a shell script is running at a time
...t atomic and is thus useless. You need an atomic mechanism for test & set.
– K Richard Pixley
Mar 31 '17 at 17:56
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Easy way to list node modules I have npm linked?
I am looking for a command that will list the names of global modules that I have npm link 'd to local copies, also listing the local path.
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