大约有 38,000 项符合查询结果（耗时：0.0355秒） [XML]
Replace values in list using Python [duplicate]
...t, but it doesn't actually save time:
items = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
for index, item in enumerate(items):
if not (item % 2):
items[index] = None
Here are (Python 3.6.3) timings demonstrating the non-timesave:
In [1]: %%timeit
...: items = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9,...
Why is debugging better in an IDE? [closed]
...
29 Answers
29
Active
...
Does Spring @Transactional attribute work on a private method?
...ct if (default) Spring Proxy AOP is used).
@See Spring Reference: Chapter 9.6 9.6 Proxying mechanisms
IMHO you should use the aspectJ mode, instead of the Spring Proxies, that will overcome the problem. And the AspectJ Transactional Aspects are woven even into private methods (checked for Spring 3....
Regular expression for letters, numbers and - _
...
209
The pattern you want is something like (see it on rubular.com):
^[a-zA-Z0-9_.-]*$
Explanation...
Check whether a string matches a regex in JS
...egex.test() if all you want is a boolean result:
console.log(/^([a-z0-9]{5,})$/.test('abc1')); // false
console.log(/^([a-z0-9]{5,})$/.test('abc12')); // true
console.log(/^([a-z0-9]{5,})$/.test('abc123')); // true
...and you could remove the () from your regexp since you've no nee...
Javascript - sort array based on another array
...
|
edited Nov 9 '12 at 9:24
answered Nov 9 '12 at 8:57
...
ATL正则表达式库使用 - C/C++ - 清泛网 - 专注C/C++及内核技术
...样构造我们的CAtlRegExp类：
CAtlRegExp <> re;
re.Parse( "{[0-9]?[0-9]}:{[0-9][0-9]}" );
ATL的正则表达式语法和Perl的正则表达式语法大同小异，不过有一个值得注意的地方就 是ATL中用大括号（{ }）表示其匹配字符串中的Group，我们上面...
Count how many files in directory PHP
...
|
edited Oct 9 '12 at 14:07
answered Oct 9 '12 at 14:01
...
For each row return the column name of the largest value
...ng sample reproducible):
DF <- data.frame(V1=c(2,8,1),V2=c(7,3,5),V3=c(9,6,4))
colnames(DF)[apply(DF,1,which.max)]
[1] "V3" "V1" "V2"
A faster solution than using apply might be max.col:
colnames(DF)[max.col(DF,ties.method="first")]
#[1] "V3" "V1" "V2"
...where ties.method can be any of "r...
How do I make a list of data frames?
...
359
The other answers show you how to make a list of data.frames when you already have a bunch of da...