大约有 49,000 项符合查询结果（耗时：0.0301秒） [XML]
Counting array elements in Python [duplicate]
... out as 2, as does len(array([[0, 0], [0, 0]])).
– EL_DON
Jan 19 '18 at 22:49
how about index of array? for example, w...
tinyxml XML解析库下载（tinyxml2.h 和 tinyxml2.cpp） - 源码下载 - 清泛...
...e removed or altered from any source
distribution.
*/
#ifndef TINYXML2_INCLUDED
#define TINYXML2_INCLUDED
#if defined(ANDROID_NDK) || defined(__BORLANDC__)
# include <ctype.h>
# include <limits.h>
# include <stdio.h>
# include <stdlib.h>
# include <string.h>
# include <std...
Regular Expression for alphanumeric and underscores
...that contains only those characters (or an empty string), try
"^[a-zA-Z0-9_]*$"
This works for .NET regular expressions, and probably a lot of other languages as well.
Breaking it down:
^ : start of string
[ : beginning of character group
a-z : any lowercase letter
A-Z : any uppercase letter
0-...
Multiple commands in gdb separated by some sort of delimiter ';'?
...with a function to run multiple commands.
# multiple commands
python
from __future__ import print_function
import gdb
class Cmds(gdb.Command):
"""run multiple commands separated by ';'"""
def __init__(self):
gdb.Command.__init__(
self,
"cmds",
gdb.COMMAND_DATA,
gdb...
How do I include a pipe | in my linux find -exec command?
...o use your top level shell to perform the piping like so:
find -name 'file_*' -follow -type f -exec zcat {} \; | agrep -dEOE 'grep'
In terms of efficiency this results costs one invocation of find, numerous invocations of zcat, and one invocation of agrep.
This would result in only a single agre...
Understanding scala enumerations
...s. It is useful, because after you import it elsewhere with import WeekDay._, you can use that type, e.g.:
def isWorkingDay(d: WeekDay) = ! (d == Sat || d == Sun)
Instead, a minimal version would just be:
object WeekDay extends Enumeration {
val Mon, Tue, Wed, Thu, Fri, Sat, Sun = Value
}
an...
Access multiple elements of list knowing their index
...
Alternatives:
>>> map(a.__getitem__, b)
[1, 5, 5]
>>> import operator
>>> operator.itemgetter(*b)(a)
(1, 5, 5)
share
|
impro...
How to force link from iframe to be opened in the parent window
...Add the following to the head of the page in the iframe:
<base target="_parent">
This will load all links on the page in the parent window. If you want your links to load in a new window, use:
<base target="_blank">
This tag is fully supported in all browsers.
...
How do I choose grid and block dimensions for CUDA kernels?
...Occupancy article (currently found at nvidia.com/content/gtc-2010/pdfs/2238_gtc2010.pdf), There's a bitbucket with code here: bitbucket.org/rvuduc/volkov-gtc10
– ofer.sheffer
Apr 10 '17 at 9:04
...
How can I get the concatenation of two lists in Python without modifying either one? [duplicate]
...e + operator, which returns the concatenation of the lists:
concat = first_list + second_list
One disadvantage of this method is that twice the memory is now being used . For very large lists, depending on how you're going to use it once it's created, itertools.chain might be your best bet:
>&...