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Why (0-6) is -6 = False? [duplicate]
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> is is not an equality test. This. is is an identity test, to see if two objects are the exact same ones. It just so happens that in the CPython implementation, some int objects are cached.
– Casey...
Java integer to byte array
...ToByteArray(int value) {
return new byte[] {
(byte)(value >>> 24),
(byte)(value >>> 16),
(byte)(value >>> 8),
(byte)value};
}
The idea is not mine. I've taken it from some post on dzone.com.
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Convert tabs to spaces in Notepad++
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To convert existing tabs to spaces, press Edit->Blank Operations->TAB to Space.
If in the future you want to enter spaces instead of tab when you press tab key:
Go to Settings->Preferences...->Language (since version 7.1) or Settings->Preferences...->T...
Java project in Eclipse: The type java.lang.Object cannot be resolved. It is indirectly referenced f
...I had that error on an Android project, for me clicking on Android Tools -> Fix Project Properties fixed it.
– Lorenz
Aug 15 '14 at 20:00
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Python group by
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Do it in 2 steps. First, create a dictionary.
>>> input = [('11013331', 'KAT'), ('9085267', 'NOT'), ('5238761', 'ETH'), ('5349618', 'ETH'), ('11788544', 'NOT'), ('962142', 'ETH'), ('7795297', 'ETH'), ('7341464', 'ETH'), ('9843236', 'KAT'), ('5594916', 'ETH'), ('1...
Difference between `mod` and `rem` in Haskell
... difference when you use a negative number as second parameter and the result is not zero:
5 `mod` 3 == 2
5 `rem` 3 == 2
5 `mod` (-3) == -1
5 `rem` (-3) == 2
(-5) `mod` 3 == 1
(-5) `rem` 3 == -2
(-5) `mod` (-3) == -2
(-5) `rem` (-3) == -2
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How do you extract a column from a multi-dimensional array?
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>>> import numpy as np
>>> A = np.array([[1,2,3,4],[5,6,7,8]])
>>> A
array([[1, 2, 3, 4],
[5, 6, 7, 8]])
>>> A[:,2] # returns the third columm
array([3, 7])
See also: "numpy.arange" ...
How to append multiple values to a list in Python
...g it another list or any other thing that provides a sequence of values.
>>> lst = [1, 2]
>>> lst.append(3)
>>> lst.append(4)
>>> lst
[1, 2, 3, 4]
>>> lst.extend([5, 6, 7])
>>> lst.extend((8, 9, 10))
>>> lst
[1, 2, 3, 4, 5, 6, 7, 8, 9,...
How to check if a Ruby object is a Boolean
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class X; def !; self end end ; x = X.new ; !!x == x #=> true
– Alexey
Jun 7 '12 at 12:08
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How to percent-encode URL parameters in Python?
...lue is '/'
That means passing '' for safe will solve your first issue:
>>> urllib.quote('/test')
'/test'
>>> urllib.quote('/test', safe='')
'%2Ftest'
About the second issue, there is a bug report about it here. Apparently it was fixed in python 3. You can workaround it by enco...