大约有 41,000 项符合查询结果（耗时：0.0762秒） [XML]
Get a specific bit from byte
...
Easy. Use a bitwise AND to compare your number with the value 2^bitNumber, which can be cheaply calculated by bit-shifting.
//your black magic
var bit = (b & (1 << bitNumber-1)) != 0;
EDIT: To add a little more detail because there ...
Why do we check up to the square root of a prime number to determine if it is prime?
...
If a number n is not a prime, it can be factored into two factors a and b:
n = a * b
Now a and b can't be both greater than the square root of n, since then the product a * b would be greater than sqrt(n) * sqrt(n) = n. So in any factorization of n, at least one of the factors must be smal...
Why does git-rebase give me merge conflicts when all I'm doing is squashing commits?
...with over 400 commits, the first couple dozen of which were a lot of trial-and-error. We want to clean up these commits by squashing many down into a single commit. Naturally, git-rebase seems the way to go. My problem is that it ends up with merge conflicts, and these conflicts are not easy to reso...
How to set transform origin in SVG
I need to resize and rotate certain elements in SVG document using javascript. The problem is, by default, it always applies the transform around the origin at (0, 0) – top left.
...
Remove header and footer from window.print()
I am using window.print() for printing page, but I got header and footer contains page title, file path, page number and date. How to remove them?
...
Drawing a connecting line between two elements [closed]
...
jsPlumb is an option available that supports drag and drop, as seen by its numerous demos, including the Flowchart demo.
It is available in a free Community edition, and a paid Toolkit edition.
The Toolkit edition wraps the Community edition with a comprehensive data bi...
Git - What is the difference between push.default “matching” and “simple”
...t for a while now, but I have never had to set up a new remote repo myself and I have been curious on doing so. I have been reading tutorials and I am confused on how to get "git push" to work.
...
Optional Methods in Java Interface
From my understanding if you implement an interface in java, the methods specified in that interface have to be used by the sub classes implementing the said interface.
...
Difference between & and && in Java? [duplicate]
I was just wondering what the difference between & and && is?
A few days I wrote a condition for an if statement the looked something like:
...
How should I log while using multiprocessing in Python?
...locks so that you don't garble things up in sys.stderr (or whatever filehandle) by having multiple processes writing to it simultaneously.
...