大约有 47,000 项符合查询结果（耗时：0.0607秒） [XML]
Principal component analysis in Python
...
|
edited Sep 3 '10 at 11:40
nikow
19.6k66 gold badges4242 silver badges6969 bronze badges
answe...
Using comparison operators in Scala's pattern matching system
....e. an if and a boolean expression after the pattern:
a match {
case 10 => println("ten")
case x if x > 10 => println("greater than ten")
case _ => println("less than ten")
}
Edit: Note that this is more than superficially different to putting an if after the =>, becaus...
Seeding the random number generator in Javascript
...|
edited May 23 '17 at 12:02
Community♦
111 silver badge
answered Feb 6 '09 at 17:42
...
In Typescript, How to check if a string is Numeric
... edited Feb 13 '18 at 14:19
k0pernikus
35.4k4040 gold badges154154 silver badges266266 bronze badges
answered May 3 '14 at 6:09
...
python pandas remove duplicate columns
...
409
There's a one line solution to the problem. This applies if some column names are duplicated an...
How do I represent a hextile/hex grid in memory?
...ex grids also)
– amitp
Jun 7 '13 at 0:58
I find the blog super confusing, using x,y,z and q,r,s then the implementatio...
What's the algorithm to calculate aspect ratio?
...
203
I gather you're looking for an usable aspect ratio integer:integer solution like 16:9 rather th...
How to calculate a logistic sigmoid function in Python?
... math.exp(-x))
And now you can test it by calling:
>>> sigmoid(0.458)
0.61253961344091512
Update: Note that the above was mainly intended as a straight one-to-one translation of the given expression into Python code. It is not tested or known to be a numerically sound implementation. I...
How to get the seconds since epoch from the time + date output of gmtime()?
...calendar.timegm().
>>> calendar.timegm(time.gmtime())
1293581619.0
You can turn your string into a time tuple with time.strptime(), which returns a time tuple that you can pass to calendar.timegm():
>>> import calendar
>>> import time
>>> calendar.timegm(time....
How do I apply CSS3 transition to all properties except background-position?
...
Here's a solution that also works on Firefox:
transition: all 0.3s ease, background-position 1ms;
I made a small demo: http://jsfiddle.net/aWzwh/
share
|
improve this answer
...