大约有 34,900 项符合查询结果（耗时：0.0475秒） [XML]
C++, copy set to vector
...
You need to use a back_inserter:
std::copy(input.begin(), input.end(), std::back_inserter(output));
std::copy doesn't add elements to the container into which you are inserting: it can't; it only has an iterator into the container. Because o...
Random row selection in Pandas dataframe
...
Something like this?
import random
def some(x, n):
return x.ix[random.sample(x.index, n)]
Note: As of Pandas v0.20.0, ix has been deprecated in favour of loc for label based indexing.
...
How to clear jQuery validation error messages?
... plugin for client side validation.
Function editUser() is called on click of 'Edit User' button, which displays error messages.
...
What is the method for converting radians to degrees?
...
Dave CostaDave Costa
42.8k77 gold badges5252 silver badges6969 bronze badges
...
How do you delete all text above a certain line
...
Rich
14.8k1414 gold badges7272 silver badges120120 bronze badges
answered Nov 12 '10 at 5:38
Andy WhiteAndy Wh...
How do I check how many options there are in a dropdown menu?
How do I check, using jQuery, how many options are there in a drop down menu?
10 Answers
...
VIM Ctrl-V Conflict with Windows Paste
...The problem is that I want to use Ctrl V as a visual mode. However, this key has conflict with Windows paste. How can I reset this key back to VIM visual mode instead of pasting. I prefer to set this in my _vimrc configuration file.
...
How to determine if a list of polygon points are in clockwise order?
Having a list of points, how do I find if they are in clockwise order?
23 Answers
23
...
How to run multiple shells on Emacs
I am using Emacs 23.3.1 on windows 7. I know that I can run shell from emacs using M-x shell. I would like to have multiple shell windows in the same time, but typing M-x shell a second time just opens me the same shell window.
...
How do I print out the contents of an object in Rails for easy debugging?
I think I'm trying to get the PHP equivalent of print_r() (print human-readable); at present the raw output is:
8 Answers...