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What's the difference between “mod” and “remainder”?
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145
There is a difference between modulus and remainder. For example:
-21 mod 4 is 3 because -21 ...
How can I create a two dimensional array in JavaScript?
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Is there a “not equal” operator in Python?
...ect identities, you can use the keyword is and its negation is not.
e.g.
1 == 1 # -> True
1 != 1 # -> False
[] is [] #-> False (distinct objects)
a = b = []; a is b # -> True (same object)
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How to find the length of a string in R
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See ?nchar. For example:
> nchar("foo")
[1] 3
> set.seed(10)
> strn <- paste(sample(LETTERS, 10), collapse = "")
> strn
[1] "NHKPBEFTLY"
> nchar(strn)
[1] 10
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Implementing slicing in __getitem__
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121
The __getitem__() method will receive a slice object when the object is sliced. Simply look at...
Get difference between two lists
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1276
In [5]: list(set(temp1) - set(temp2))
Out[5]: ['Four', 'Three']
Beware that
In [5]: set([...
Converting string into datetime
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from datetime import datetime
datetime_object = datetime.strptime('Jun 1 2005 1:33PM', '%b %d %Y %I:%M%p')
The resulting datetime object is timezone-naive.
Links:
Python documentation for strptime: Python 2, Python 3
Python documentation for strptime/strftime format strings: Python 2, Pyth...
PHP append one array to another (not array_push or +)
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12 Answers
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Cleanest and most Pythonic way to get tomorrow's date?
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datetime.date.today() + datetime.timedelta(days=1) should do the trick
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SLF4J: Failed to load class “org.slf4j.impl.StaticLoggerBinder”. error
The above error came after updating the m2e to version 1.1. By removing m2e 1.1 and rolling back to m2e 1.0 everything worked fine. I tried to repeat the problem in Windows and Ubuntu and it gave me the exact same error. Numerous configurations of the slf4j-api and logback were tested but none see...