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Python: split a list based on a condition?
...ting items into different lists by some key, heres a generic function that does that:
DROP_VALUE = lambda _:_
def split_by_key(seq, resultmapping, keyfunc, default=DROP_VALUE):
"""Split a sequence into lists based on a key function.
seq - input sequence
resultmapping - a dictio...
Why don't Java Generics support primitive types?
...cts and can represent any
user defined object.
Since all primitives doesn't inherit from "Object" so we can't use it
as a generic type.
FYI : Project Valhalla is trying to address above issue.
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Differences between “BEGIN RSA PRIVATE KEY” and “BEGIN PRIVATE KEY”
... to BEGIN RSA PRIVATE KEY, which always specifies an RSA key and therefore doesn't include a key type OID. BEGIN RSA PRIVATE KEY is PKCS#1:
RSA Private Key file (PKCS#1)
The RSA private key PEM file is specific for RSA keys.
It starts and ends with the tags:
-----BEGIN RSA PRIVATE KEY...
Git push/clone to new server
...is obtuse and makes git less usable. I love me some git, but good heavens does it have some UI issues..
– Ross Rogers
Nov 3 '13 at 22:54
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Using a strategy pattern and a command pattern
...ategy pattern takes in parameters for execution, while the Command pattern doesn't.
7 Answers
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What do the f and t commands do in Vim?
...s probably worth going easy on beginners for not depending on :help, as it doesn't always provide the best explanation for the non-esoteric crowd. what does to [count]'th even mean?
– Tycholiz
Jan 6 at 6:51
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windows service vs scheduled task
...r long running process has run longer than the assigned timer interval, it doesn't kick off again until the existing process has finished.
After you have written all of that, you think, why didn't I just use Thread.Sleep? That allows me to let the current thread keep running until it has finished a...
How do I initialize the base (super) class?
...use:
class C(B):
def method(self, arg):
super().method(arg) # This does the same thing as:
# super(C, self).method(arg)
https://docs.python.org/3/library/functions.html#super
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How to include layout inside layout?
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Both of the links does not exist any more.
– Jimmy
Apr 16 '14 at 14:26
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Fastest way to replace NAs in a large data.table
...reference in the vector. That would at least halve the 20 seconds I think. Does such a function exist in any R package?
The reason f_andrie fails may be because it copies the whole of dt1, or creates a logical matrix as big as the whole of dt1, a few times. The other 2 methods work on one column at...