大约有 44,800 项符合查询结果（耗时：0.0471秒） [XML]
Pairs from single list
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52
My favorite way to do it:
from itertools import izip
def pairwise(t):
it = iter(t)
ret...
Which is faster: while(1) or while(2)?
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23 Answers
23
Active
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Testing whether a value is odd or even
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22 Answers
22
Active
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Immutable vs Mutable types
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233
What? Floats are immutable? But can't I do
x = 5.0
x += 7.0
print x # 12.0
Doesn't that "mu...
Python Dictionary Comprehension
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528
There are dictionary comprehensions in Python 2.7+, but they don't work quite the way you're tr...
How can I match a string with a regex in Bash?
...ite a bash script that contains a function so when given a .tar , .tar.bz2 , .tar.gz etc. file it uses tar with the relevant switches to decompress the file.
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What is the most efficient/elegant way to parse a flat table into a tree?
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462
Now that MySQL 8.0 supports recursive queries, we can say that all popular SQL databases support...
Convert dd-mm-yyyy string to date
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329
Split on "-"
Parse the string into the parts you need:
var from = $("#datepicker").val().spli...
How do I use .toLocaleTimeString() without displaying seconds?
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325
You can always set the options, based on this page you can set, to get rid of the seconds, some...
All but last element of Ruby array
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Perhaps...
a = t # => [1, 2, 3, 4]
a.first a.size - 1 # => [1, 2, 3]
or
a.take 3
or
a.first 3
or
a.pop
which will return the last and leave the array with everything before it
or make the computer work for its dinner:
a.reverse.drop(1...