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How to subtract X days from a date using Java calendar?
Anyone know a simple way using Java calendar to subtract X days from a date?
10 Answers
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Linux c++ error: undefined reference to 'dlopen'
I work in Linux with C++ (Eclipse), and want to use a library.
Eclipse shows me an error:
10 Answers
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Detect and exclude outliers in Pandas data frame
... remove all rows that have outliers in at least one column, the following expression would do that in one shot.
df = pd.DataFrame(np.random.randn(100, 3))
from scipy import stats
df[(np.abs(stats.zscore(df)) < 3).all(axis=1)]
description:
For each column, first it computes the Z-score of ea...
How do the PHP equality (== double equals) and identity (=== triple equals) comparison operators dif
...en the loosely == equal operator and the strict === identical operator is exactly explained in the manual:
Comparison Operators
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How can I find the current OS in Python? [duplicate]
...form (docs) to get the platform. sys.platform will distinguish between linux, other unixes, and OS X, while os.name is "posix" for all of them.
For much more detailed information, use the platform module. This has cross-platform functions that will give you information on the machine architecture, ...
Which iOS app version/build number(s) MUST be incremented upon App Store release?
...of the conditions is "You cannot re-use Version Numbers," but in the last example, version numbers are staying the same while build numbers are increasing. Am I misinterpreting something?
– Emil
Mar 20 '18 at 17:05
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What is a monad?
... looked at Haskell recently, what would be a brief, succinct, practical explanation as to what a monad essentially is?
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What does Java option -Xmx stand for? [duplicate]
java -Xmx1024m filename
5 Answers
5
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Change type of varchar field to integer: “cannot be cast automatically to type integer”
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There is no implicit (automatic) cast from text or varchar to integer (i.e. you cannot pass a varchar to a function expecting integer or assign a varchar field to an integer one), so you must specify an explicit cast using ALTER TABLE ... ALTER COLUMN ... TYPE ... USING...
Can pandas automatically recognize dates?
...ively surprised by the fact that while reading data from a data file (for example) pandas is able to recognize types of values:
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