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Define variable to use with IN operator (T-SQL)
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How can I install pip on Windows?
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Python 2.7.9+ and 3.4+
Good news! Python 3.4 (released March 2014) and Python 2.7.9 (released December 2014) ship with Pip. This is the best feature of any Python release. It makes the community's wealth of libraries accessible to everyone. New...
List comprehension: Returning two (or more) items for each item
...gt; list(chain.from_iterable((f(x), g(x)) for x in range(3)))
[2, 0, 3, 1, 4, 4]
Timings:
from timeit import timeit
f = lambda x: x + 2
g = lambda x: x ** 2
def fg(x):
yield f(x)
yield g(x)
print timeit(stmt='list(chain.from_iterable((f(x), g(x)) for x in range(3)))',
setu...
How do you delete a column by name in data.table?
... copy of it), Methods 1, 2a, and 2b are really the best options.
# Method 4:
df3[, .SD, .SDcols = !patterns("^foo$")]
Lastly there are approaches using with=FALSE, though data.table is gradually moving away from using this argument so it's now discouraged where you can avoid it; showing here so...
Python: Tuples/dictionaries as keys, select, sort
Suppose I have quantities of fruits of different colors, e.g., 24 blue bananas, 12 green apples, 0 blue strawberries and so on.
I'd like to organize them in a data structure in Python that allows for easy selection and sorting. My idea was to put them into a dictionary with tuples as keys, e.g.,
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Numpy `logical_or` for more than two arguments
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answered Dec 11 '13 at 19:48
abarnertabarnert
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Where can I find WcfTestClient.exe (part of Visual Studio)
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Convert a Python list with strings all to lowercase or uppercase
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461
It can be done with list comprehensions. These basically take the form of [function-of-item fo...
How to add a “open git-bash here…” context menu to the windows explorer?
...ate to HKEY_CURRENT_USER\SOFTWARE\Classes\Directory\Background\shell
Step 4 : Right-click on "shell" and choose New > Key. name the Key "Bash"
Step 5 : Modify the value and set it to "open in Bash" This is the text that appears in the right click.
Step 6 : Create a new key under Bash and...
How to remove a key from Hash and get the remaining hash in Ruby/Rails?
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