大约有 47,000 项符合查询结果（耗时：0.0452秒） [XML]
Convert light frequency to RGB?
...
And the Fourmilab article makes the important point that some colours are not representable in RGB (bright oranges being a good example) because you cannot "make" arbitrary colours of light by adding three primary colours tog...
How to calculate date difference in JavaScript?
... milliseconds to years. You must be aware of bissextile year, of timezone, and some days have 23 or 25 hours. Some years have 365,25 days, so there is no simple arithmetic here (still looking for an accurate solution).
– Alexandre Salomé
May 20 '14 at 12:50
...
What does |= (ior) do in Python?
.... See examples below.
Sets
For example, the union of two assigned sets s1 and s2 share the following equivalent expressions:
>>> s1 = s1 | s12 # 1
>>> s1 |= s2 # 2
>>> s1.__ior__(s2) ...
Count work days between two dates
...
@greektreat It works fine. It's just that both @StartDate and @EndDate are included in the count. If you want Monday to Tuesday to count as 1 day, just remove the "+ 1" after the first DATEDIFF. Then you'll also get Fri->Sat=0, Fri->Sun=0, Fri->Mon=1.
–...
[] and {} vs list() and dict(), which is better?
I understand that they are both essentially the same thing, but in terms of style, which is the better (more Pythonic) one to use to create an empty list or dict?
...
Converting a Uniform Distribution to a Normal Distribution
How can I convert a uniform distribution (as most random number generators produce, e.g. between 0.0 and 1.0) into a normal distribution? What if I want a mean and standard deviation of my choosing?
...
What are the pros and cons of the SVN plugins for Eclipse, Subclipse and Subversive? [closed]
...e . Broadly speaking they both do the same things. What are the advantages and disadvantages of each?
32 Answers
...
Optimal way to concatenate/aggregate strings
...on to facilitate this would be nice. I've tried solutions using COALESCE and FOR XML , but they just don't cut it for me.
...
How to change Android version and code version number?
How to change Android version and code version number Android Studio? I want to change apk file (app) on Google Play and I need to change Android version and code version number. I tried with this in AndroidManifest.xml file in Android Studio:
...
Easy interview question got harder: given numbers 1..100, find the missing number(s) given exactly k
...
Here's a summary of Dimitris Andreou's link.
Remember sum of i-th powers, where i=1,2,..,k. This reduces the problem to solving the system of equations
a1 + a2 + ... + ak = b1
a12 + a22 + ... + ak2 = b2
...
a1k + a2k + ... + akk = bk
Using Newton's...