大约有 40,000 项符合查询结果（耗时：0.0238秒） [XML]
MySQL select 10 random rows from 600K rows fast
How can I best write a query that selects 10 rows randomly from a total of 600k?
26 Answers
...
How do I lock the orientation to portrait mode in a iPhone Web Application?
...height.
@media (max-height: 480px) and (min-width: 480px) and (max-width: 600px) {
html{
-webkit-transform: rotate(-90deg);
-moz-transform: rotate(-90deg);
-ms-transform: rotate(-90deg);
-o-transform: rotate(-90deg);
transform: rotate...
Changing the resolution of a VNC session in linux [closed]
...o a Linux workstation at work. At work I have a 20" monitor that runs at 1600x1200, while at home I use my laptop with its resolution of 1440x900.
If I set the vncserver to run at 1440x900 I miss out on a lot of space on my monitor, whereas if I set it to run at 1600x1200 it doesn't fit on the lapt...
JavaScript: Passing parameters to a callback function
...s the additional param(s).
function login(accessedViaPopup) {
//pass FB.login a call back function wrapper that will accept the
//response param and then call my "real" callback with the additional param
FB.login(function(response){
fb_login_callback(response,accessedViaPopup);...
Permission denied (publickey) when deploying heroku code. fatal: The remote end hung up unexpectedly
...ons on heroku.pub threw an error when I tried to git push. I had to chmod 600 heroku.pub and then when I pushed it worked.
– Dylan Valade
Oct 12 '12 at 2:53
1
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Is this a “good enough” random algorithm; why isn't it used if it's faster?
...w Random();
var qrand = new QuickRandom();
int w = 600;
int h = 600;
CreateMatrix(w, h, rand.NextDouble).Save("System.Random.png", ImageFormat.Png);
CreateMatrix(w, h, qrand.Random).Save("QuickRandom.png", ImageFormat.Png);
}
...
Check for internet connection availability in Swift
...nt8(sizeofValue(zeroAddress))
zeroAddress.sin_family = sa_family_t(AF_INET)
let defaultRouteReachability = withUnsafePointer(&zeroAddress) {
SCNetworkReachabilityCreateWithAddress(nil, UnsafePointer($0)).takeRetainedValue()
}
var flags: SCNetworkReac...
How to delete images from a private docker registry?
...k '{print ($3)}'
Response will be in the following format:
sha256:6de813fb93debd551ea6781e90b02f1f93efab9d882a6cd06bbd96a07188b073
Run the command given below with manifest value:
curl -v --silent -H "Accept: application/vnd.docker.distribution.manifest.v2+json" -X DELETE http://127.0.0.1:5000...
Redis key naming conventions?
...swered Aug 7 '11 at 7:37
yojimbo87yojimbo87
57.1k2121 gold badges118118 silver badges128128 bronze badges
...
How does the Java 'for each' loop work?
...s
Test B: 269,167,681 nanoseconds
B faster by 89,429,941 nanoseconds (24.438799231635727% faster)
[C:\java_code\]java TimeIteratorVsIndexIntArray 1000000
Test A: 377,461,823 nanoseconds
Test B: 278,694,271 nanoseconds
B faster by 98,767,552 nanoseconds (25.666236154695838% faster)
[C:\java_code\]j...