大约有 16,300 项符合查询结果（耗时：0.0302秒） [XML]
What is the fastest way to compute sin and cos together?
I would like to compute both the sine and co-sine of a value together (for example to create a rotation matrix). Of course I could compute them separately one after another like a = cos(x); b = sin(x); , but I wonder if there is a faster way when needing both values.
...
What is “(program)” in Chrome debugger’s profiler?
What is “(program)” in the function column of the Chrome debugger?
3 Answers
3
...
How can you encode a string to Base64 in JavaScript?
I have a PHP script that can encode a PNG image to a Base64 string.
26 Answers
26
...
How do I use itertools.groupby()?
I haven't been able to find an understandable explanation of how to actually use Python's itertools.groupby() function. What I'm trying to do is this:
...
What is the Swift equivalent to Objective-C's “@synchronized”?
I've searched the Swift book, but can't find the Swift version of @synchronized. How do I do mutual exclusion in Swift?
21 ...
Is multiplication and division using shift operators in C actually faster?
Multiplication and division can be achieved using bit operators, for example
19 Answers
...
How to output a multiline string in Bash?
How can I output a multipline string in Bash without using multiple echo calls like so:
7 Answers
...
OS detecting makefile
I routinely work on several different computers and several different operating systems, which are Mac OS X, Linux, or Solaris. For the project I'm working on, I pull my code from a remote git repository.
...
Android: How can I validate EditText input?
I need to do form input validation on a series of EditTexts. I'm using OnFocusChangeListeners to trigger the validation after the user types into each one, but this doesn't behave as desired for the last EditText.
...
Fade Effect on Link Hover?
on many sites, such as http://www.clearleft.com , you'll notice that when the links are hovered over, they will fade into a different color as opposed to immediately switching, the default action.
...