大约有 42,000 项符合查询结果（耗时：0.0499秒） [XML]
Unique combination of all elements from two (or more) vectors
... expand.grid(a,b)
Var1 Var2
1 ABC 2012-05-01
2 DEF 2012-05-01
3 GHI 2012-05-01
4 ABC 2012-05-02
5 DEF 2012-05-02
6 GHI 2012-05-02
7 ABC 2012-05-03
8 DEF 2012-05-03
9 GHI 2012-05-03
10 ABC 2012-05-04
11 DEF 2012-05-04
12 GHI 2012-05-04
13 ABC 2012-05-05
14 DEF 2012-05-...
Convert two lists into a dictionary
...ke this:
>>> keys = ['a', 'b', 'c']
>>> values = [1, 2, 3]
>>> dictionary = dict(zip(keys, values))
>>> print(dictionary)
{'a': 1, 'b': 2, 'c': 3}
Voila :-) The pairwise dict constructor and zip function are awesomely useful: https://docs.python.org/3/library/...
How to convert a NumPy array to PIL image applying matplotlib colormap
...
3 Answers
3
Active
...
Convert a matrix to a 1 dimensional array
I have a matrix (32X48).
10 Answers
10
...
warning: implicit declaration of function
...
236
You are using a function for which the compiler has not seen a declaration ("prototype") yet.
...
Undoing a 'git push'
...t_known_good_commit:branch_name
or in your case
git push -f origin cc4b63bebb6:alpha-0.3.0
You may have receive.denyNonFastForwards set on the remote repository. If this is the case, then you will get an error which includes the phrase [remote rejected].
In this scenario, you will have to dele...
How do you add an array to another array in Ruby and not end up with a multi-dimensional result?
...
|
edited Jul 23 '14 at 19:10
answered Nov 26 '09 at 5:09
...
How does the Brainfuck Hello World actually work?
...ctual cell.
Take a look at ASCII table. For example, decimal code of ! is 33, while a is 97.
Well, lets imagine your BF program memory looks like:
...[0][0][*0*][0][0]...
Assuming standard input stands for a, if you use comma , operator, what BF does is read a decimal ASCII code 97 to memory:
...
Use of .apply() with 'new' operator. Is this possible?
...
36 Answers
36
Active
...
What is the _snowman param in Ruby on Rails 3 forms for?
In Ruby on Rails 3 (currently using Beta 4), I see that when using the form_tag or form_for helpers there is a hidden field named _snowman with the value of ☃ ( Unicode \x9731) showing up.
...