大约有 230 项符合查询结果（耗时：0.0216秒） [XML]
What is the fastest way to compute sin and cos together?
...
.align 4,0x90
.globl _fsincos
_fsincos:
pushl %ebp
movl %esp, %ebp
fldl 12(%ebp)
fsincos
movl 8(%ebp), %eax
fstpl 8(%eax)
fstpl (%eax)
leave
ret $4
.subsections_via_symbols
Tada, it uses the fsincos instruction!
...
SQLite INSERT - ON DUPLICATE KEY UPDATE (UPSERT)
...hing that was portable. I realize REPLACE INTO won't work with all cases, esp where PK preservation is needed, but will for many cases.
– Jacob Thomason
Dec 7 '12 at 5:22
...
What should my Objective-C singleton look like? [closed]
...really, truly, ONLY want a single instance of your class. Which you don't, esp. for unit tests.
– Chris Hanson
Sep 28 '08 at 9:35
...
Can you use an alias in the WHERE clause in mysql?
...
Nice explanation, esp. the "but in a where clause... repeat.." part
– th3an0maly
Jan 17 '13 at 7:57
4
...
Windows batch files: .bat vs .cmd?
...
Chris: see the current version of the Wikipedia article, esp. the comment by Mark Zbikowski at groups.google.com/group/…
– Mark
May 4 '09 at 9:01
3
...
Build Eclipse Java Project from Command Line
...h is after.
For a batch compilation, please refer to Compiling Java code, especially the section "Using the batch compiler"
The batch compiler class is located in the JDT Core plug-in. The name of the class is org.eclipse.jdt.compiler.batch.BatchCompiler. It is packaged into plugins/org.eclipse...
Iterate over the lines of a string
...ry fast ways; putting strings together by programming at a very low level (esp. by loops of += of very small pieces) can be quite slow.
Edit: added @Jacob's proposal, slightly modified to give the same results as the others (trailing blanks on a line are kept), i.e.:
from cStringIO import StringIO...
C# vs Java Enum (for those new to C#)
...tances of that class:
using System;
using System.Collections.Generic;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
Planet planetEarth = Planet.MERCURY;
double earthRadius = pEarth.Radius; // Just threw it in to s...
Most efficient way to check for DBNull and then assign to a variable?
... In virtually all cases == is going to be equivalent to ReferenceEquals (esp. to DBNull) and it's much more readable. Use @Marc Gravell's optimization if you want, but I'm with him -- probably not going to help much. BTW, reference equality ought to always beat type checking.
...
How does this CSS produce a circle?
...r resources
References
W3C: CSS Backgrounds and Borders Module Level 3 (esp. 5. Rounded Corners)
Demonstrations
Please open the demo below, which shows how the border-radius affects the border (think of the inner blue box as the content box, the inner black border as the padding border, the e...