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How to add leading zeros for for-loop in shell? [duplicate]
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Use the following syntax:
$ for i in {01..05}; do echo "$i"; done
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Disclaimer: L...
How can I clear or empty a StringBuilder? [duplicate]
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answered Mar 4 '11 at 10:29
Marcus FrödinMarcus Frödin
10.5k22 gold badges2222 silver badges1616 bronze badges
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Rank items in an array using Python/NumPy, without sorting array twice
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Use slicing on the left-hand side in the last step:
array = numpy.array([4,2,7,1])
temp = array.argsort()
ranks = numpy.empty_like(temp)
ranks[temp] = numpy.arange(len(array))
This avoids sorting twice by inverting the permutation in the last step.
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Tricky Google interview question
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Dijkstra derives an eloquent solution in "A Discipline of Programming". He attributes the proble...
Page redirect after certain time PHP
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edited Jun 12 '14 at 13:51
jp2code
24.1k3434 gold badges137137 silver badges243243 bronze badges
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java.lang.NoClassDefFoundError: org/hamcrest/SelfDescribing
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Eric Leschinski
115k4949 gold badges368368 silver badges313313 bronze badges
answered Sep 28 '13 at 8:14
Jiacai LiuJiacai...
“Could not run curl-config: [Errno 2] No such file or directory” when installing pycurl
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488
On Debian I needed the following packages to fix this
sudo apt install libcurl4-openssl-dev l...
IOException: read failed, socket might closed - Bluetooth on Android 4.3
...xception when opening a BluetoothSocket on my Nexus 7 (2012), with Android 4.3 (Build JWR66Y, I guess the second 4.3 update). I have seen some related postings (e.g. https://stackoverflow.com/questions/13648373/bluetoothsocket-connect-throwing-exception-read-failed ), but none seems to provide a wo...
How can I read inputs as numbers?
...gt;>> import sys
>>> sys.version
'2.7.6 (default, Mar 22 2014, 22:59:56) \n[GCC 4.8.2]'
>>> data = input("Enter a number: ")
Enter a number: 5 + 17
>>> data, type(data)
(22, <type 'int'>)
The data 5 + 17 is evaluated and the result is 22. When it evaluates th...
How to sort two lists (which reference each other) in the exact same way
...ly simple using python's built-in zip function:
>>> list1 = [3,2,4,1, 1]
>>> list2 = ['three', 'two', 'four', 'one', 'one2']
>>> list1, list2 = zip(*sorted(zip(list1, list2)))
>>> list1
(1, 1, 2, 3, 4)
>>> list2
('one', 'one2', 'two', 'three', 'four')
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