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How do you specify the Java compiler version in a pom.xml file?
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312
<project>
[...]
<build>
[...]
<plugins>
<plugin>
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Set value for particular cell in pandas DataFrame using index
...y df.
In [18]: %timeit df.set_value('C', 'x', 10)
100000 loops, best of 3: 2.9 µs per loop
In [20]: %timeit df['x']['C'] = 10
100000 loops, best of 3: 6.31 µs per loop
In [81]: %timeit df.at['C', 'x'] = 10
100000 loops, best of 3: 9.2 µs per loop
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Why is semicolon allowed in this python snippet?
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233
Python does not require semi-colons to terminate statements. Semi colons can be used to delimi...
`staticmethod` and `abc.abstractmethod`: Will it blend?
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35
class abstractstatic(staticmethod):
__slots__ = ()
def __init__(self, function):
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Transform DateTime into simple Date in Ruby on Rails
...paging, ignore! :-)
– Notinlist
Sep 3 '10 at 8:56
@Notinlist the entirety of rails is written in Ruby, so you could pr...
What's with 181783497276652981 and 8682522807148012 in Random (Java 7)?
Why were 181783497276652981 and 8682522807148012 chosen in Random.java ?
3 Answers
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Xcode doesn't show the line that causes a crash
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301
You should also ensure that you have breakpoints set for all exceptions. This will cause Xcod...
ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.al
...wo arrays to be evaluated in boolean context (by
calling __bool__ in Python3 or __nonzero__ in Python2).
Your original code
mask = ((r["dt"] >= startdate) & (r["dt"] <= enddate))
selected = r[mask]
looks correct. However, if you do want and, then instead of a and b use (a-b).any() or ...
How do I start Mongo DB from Windows?
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Download the mongodb
Step 2
Follow normal setup instructions
Step 3
Create the following folder
C:\data\db
Step 4
cd to C:\Program Files\MongoDB\Server\3.2\bin>
enter command mongod
by default, mongodb server will start at port 27017
Step 5
(optionally) download RoboMongo and follo...
Windows batch: call more than one command in a FOR loop?
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3 Answers
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