大约有 43,000 项符合查询结果（耗时：0.0370秒） [XML]
How does !!~ (not not tilde/bang bang tilde) alter the result of a 'contains/included' Array method
...
13 Answers
13
Active
...
Passing command line arguments to R CMD BATCH
...
115
My impression is that R CMD BATCH is a bit of a relict. In any case, the more recent Rscript e...
Regular expression to match any character being repeated more than 10 times
...le regular expression to match the same character being repeated more than 10 or so times. So for example, if I have a document littered with horizontal lines:
...
In Matlab, when is it optimal to use bsxfun?
...
152
+500
There ...
How to get the anchor from the URL using jQuery?
...se the .indexOf() and .substring(), like this:
var url = "www.aaa.com/task1/1.3.html#a_1";
var hash = url.substring(url.indexOf("#")+1);
You can give it a try here, if it may not have a # in it, do an if(url.indexOf("#") != -1) check like this:
var url = "www.aaa.com/task1/1.3.html#a_1", idx = u...
Mean per group in a data.frame [duplicate]
...aggregate was designed for:
d <- read.table(text=
'Name Month Rate1 Rate2
Aira 1 12 23
Aira 2 18 73
Aira 3 19 45
Ben 1 53 19
Ben 2 22 87
Ben 3 19 45
Cat 1 22 ...
Can't install Ruby under Lion with RVM – GCC issues
...
16 Answers
16
Active
...
how to change default python version?
...onfusing that when I type python -V in Terminal it says that Python 2.6.1 , how can I change the default python version?
...
Bubble Sort Homework
...
127
To explain why your script isn't working right now, I'll rename the variable unsorted to sorte...
Python Dictionary Comprehension
...
>>> d = {n: n**2 for n in range(5)}
>>> print d
{0: 0, 1: 1, 2: 4, 3: 9, 4: 16}
If you want to set them all to True:
>>> d = {n: True for n in range(5)}
>>> print d
{0: True, 1: True, 2: True, 3: True, 4: True}
What you seem to be asking for is a way to set...