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Why Func instead of Predicate?
...t; the guideline states:
Do use the new LINQ types Func<> and
Em>x m>pression<> instead of custom
delegates and predicates
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How do I sort an array of hashes by a value in the hash?
This Ruby code is not behaving as I would em>x m>pect:
4 Answers
4
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Line continuation for list comprehensions or generator em>x m>pressions in python
...
[m>x m>
for
m>x m>
in
(1,2,3)
]
works fine, so you can pretty much do as you please. I'd personally prefer
[something_that_is_pretty_long
for something_that_is_pretty_long
in somethings_that_are_pretty_long]
The reason why...
How to do a scatter plot with empty circles in Python?
...
Try the following:
import matplotlib.pyplot as plt
import numpy as np
m>x m> = np.random.randn(60)
y = np.random.randn(60)
plt.scatter(m>x m>, y, s=80, facecolors='none', edgecolors='r')
plt.show()
Note: For other types of plots see this post on the use of markeredgecolor and markerfacecolor.
...
Is it pythonic to import inside functions?
... your module is by what it needs to import.
If I'm adding new code to an em>x m>isting file I'll usually do the import where it's needed and then if the code stays I'll make things more permanent by moving the import line to the top of the file.
One other point, I prefer to get an ImportError em>x m>ception...
Simple em>x m>planation of clojure protocols
...ols and what problem they are supposed to solve. Does anyone have a clear em>x m>planation of the whats and whys of clojure protocols?
...
How does this giant regem>x m> work?
...
This is not entirely a regular em>x m>pression. The regem>x m> is /.*/, which basically means "match everything". The /e Modifier however eval()'s the code in the nem>x m>t parameter. In fact this is a way for someone to hide code. The following proof that this is ...
Python: using a recursive algorithm as a generator
...
def getPermutations(string, prefim>x m>=""):
if len(string) == 1:
yield prefim>x m> + string
else:
for i in m>x m>range(len(string)):
for perm in getPermutations(string[:i] + string[i+1:], prefim>x m>+string[i]):
yield perm
...
Scala 2.8 breakOut
...lable.
About breakOut
So, what's the purpose of breakOut? Consider the em>x m>ample given for the question, You take a list of strings, transform each string into a tuple (Int, String), and then produce a Map out of it. The most obvious way to do that would produce an intermediary List[(Int, String)] ...
Rails: select unique values from a column
...rks only on "top level" queries, like above. Doesn't work on collection prom>x m>ies ("has_many" relations, for em>x m>ample).
Address.distinct.pluck(:city) # => ['Moscow']
user.addresses.distinct.pluck(:city) # => ['Moscow', 'Moscow', 'Moscow']
In this case, deduplicate after the query
user.address...