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Performance of foreach, array_map with lambda and array_map with static function
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Python module os.chmod(file, 664) does not change the permission to rw-rw-r— but -w--wx----
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130
Found this on a different forum
If you're wondering why that leading zero is important, it'...
Python JSON serialize a Decimal object
I have a Decimal('3.9') as part of an object, and wish to encode this to a JSON string which should look like {'x': 3.9} . I don't care about precision on the client side, so a float is fine.
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In Matplotlib, what does the argument mean in fig.add_subplot(111)?
...a single integer. For example, "111" means "1x1 grid, first subplot" and "234" means "2x3 grid, 4th subplot".
Alternative form for add_subplot(111) is add_subplot(1, 1, 1).
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How do I convert a String object into a Hash object?
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What is the difference between ui-bootstrap-tpls.min.js and ui-bootstrap.min.js?
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Getting parts of a URL (Regex)
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A single regex to parse and breakup a
full URL including query parameters
and anchors e.g...
python pandas dataframe to dictionary
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answered Sep 9 '13 at 9:55
jorisjoris
94.6k3030 gold badges197197 silver badges171171 bronze badges
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Display number with leading zeros
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In Python 2 (and Python 3) you can do:
print "%02d" % (1,)
Basically % is like printf or sprintf (see docs).
For Python 3.+, the same behavior can also be achieved with format:
print("{:02d}".format(1))
For Python 3.6+ the same behavior c...
Unique (non-repeating) random numbers in O(1)?
... = n, max starts off at 10:
+--+--+--+--+--+--+--+--+--+--+--+
| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9|10|
+--+--+--+--+--+--+--+--+--+--+--+
^
max
At each iteration, a random number r is selected between 0 and max, array[r] and array[max]...