大约有 44,500 项符合查询结果（耗时：0.0424秒） [XML]
What's the difference between lists enclosed by square brackets and parentheses in Python?
...
278
Square brackets are lists while parentheses are tuples.
A list is mutable, meaning you can ch...
Numpy where function multiple conditions
...
204
The best way in your particular case would just be to change your two criteria to one criterio...
How can I create a correlation matrix in R?
I have 92 set of data of same type.
5 Answers
5
...
Best way to represent a fraction in Java?
...
26 Answers
26
Active
...
How to do exponential and logarithmic curve fitting in Python? I found only polynomial fitting
...
230
For fitting y = A + B log x, just fit y against (log x).
>>> x = numpy.array([1, 7, ...
Ignoring new fields on JSON objects using Jackson [duplicate]
...
12 Answers
12
Active
...
Split string every nth character?
...
>>> line = '1234567890'
>>> n = 2
>>> [line[i:i+n] for i in range(0, len(line), n)]
['12', '34', '56', '78', '90']
share
|
...
How to get first element in a list of tuples?
...
12 Answers
12
Active
...
How to check if a string contains a substring in Bash
...
26 Answers
26
Active
...
How to split a delimited string in Ruby and convert it to an array?
...
>> "1,2,3,4".split(",")
=> ["1", "2", "3", "4"]
Or for integers:
>> "1,2,3,4".split(",").map { |s| s.to_i }
=> [1, 2, 3, 4]
Or for later versions of ruby (>= 1.9 - as pointed out by Alex):
>> "1,2,3,4".sp...