大约有 44,500 项符合查询结果（耗时：0.0483秒） [XML]
Looping over a list in Python
...
200
Try this,
x in mylist is better and more readable than x in mylist[:] and your len(x) should ...
快速理解 高频对冲套利自动交易（程式化交易） - 更多技术 - 清泛网 - 专注...
...样一件事，不断的开仓、平仓、再开仓、再平仓。。。
2、何谓：对冲？在做空制度下，同时，持有空单和多单，以此将市场暴涨暴跌对账户的冲击降低到可接受范围；
3、何谓：套利？在狭义上，分跨期套利、跨品种套利，目...
Compare floats in php
...
237
If you do it like this they should be the same. But note that a characteristic of floating-poi...
Leading zeros for Int in Swift
...
Assuming you want a field length of 2 with leading zeros you'd do this:
import Foundation
for myInt in 1 ... 3 {
print(String(format: "%02d", myInt))
}
output:
01
02
03
This requires import Foundation so technically it is not a part of the Swift la...
Can I replace groups in Java regex?
...
126
Use $n (where n is a digit) to refer to captured subsequences in replaceFirst(...). I'm assumin...
How to rethrow InnerException without losing stack trace in C#?
...
answered Jun 13 '13 at 15:42
Paul TurnerPaul Turner
34.1k1313 gold badges8787 silver badges153153 bronze badges
...
Python super() raises TypeError
In Python 2.5, the following code raises a TypeError :
4 Answers
4
...
promise already under evaluation: recursive default argument reference or earlier problems?
...occur we get:
f <- function(x, T) {
10 * sin(0.3 * x) * sin(1.3 * x^2) + 0.001 * x^3 + 0.2 * x + 80
}
g <- function(x, T, f. = f) { ## 1. note f.
exp(-f.(x)/T)
}
test<- function(g. = g, T = 1) { ## 2. note g.
g.(1,T)
}
test()
## [1] 8.560335e-37
...
How to put more than 1000 values into an Oracle IN clause [duplicate]
...Otávio DécioOtávio Décio
68.9k1414 gold badges152152 silver badges219219 bronze badges
7
...
How do I make an HTTP request in Swift?
...
20 Answers
20
Active
...