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Fast permutation -> number -> permutation mapping algorithms
... http://antoinecomeau.blogspot.ca/2014/07/mapping-between-permutations-and.html
public static int[] perm(int n, int k)
{
int i, ind, m=k;
int[] permuted = new int[n];
int[] elems = new int[n];
for(i=0;i<n;i++) elems[i]=i;
for(i=0;i<n;i++)
{
ind=m%(n-i);
...
How can you do anything useful without mutable state?
...mething changes. A better approach is described here (prog21.dadgum.com/26.html): rather than having objects update themselves and all of their dependencies, its much easier to have them pass messages about their state to an event loop which handles all of the updating. This makes it much easier to ...
多媒体组件 · App Inventor 2 中文网
...式，请参阅http://developer.android.com/guide/appendix/media-formats.html。
事件
无
方法
暂停()
如果正在播放声音，则暂停播放。
播放()
播放声音。
恢复()
暂停后继续播放声音。
停止()
如果正在播放声音，则停止播放...
How can I determine whether a 2D Point is within a Polygon?
... false;
}
// https://wrf.ecse.rpi.edu/Research/Short_Notes/pnpoly.html
bool inside = false;
for ( int i = 0, j = polygon.Length - 1 ; i < polygon.Length ; j = i++ )
{
if ( ( polygon[ i ].Y > p.Y ) != ( polygon[ j ].Y > p.Y ) &&
p.X < ( po...
What are the best JVM settings for Eclipse? [closed]
... As per this link, oracle.com/technetwork/java/javase/gc-tuning-6-140523.html#icms, you need to have -XX:+UseConcMarkSweepGC in order to use -XX:+CMSIncrementalMode. That is missing from your example above. We would not need CMSIncrementalMode in case we use G1 GC, am I right?
...
Bootstrap NavBar with left, center or right aligned items
...enu, not the other way around.
This can be accomplished strictly in the HTML by using Bootstrap's "navbar-right" and "navbar-left" for the logos and then "nav-justified" instead of "navbar-nav" for your UL. No addtional CSS needed (unless you want to put the navbar-collapse toggle in the center i...
Comparison of full text search engine - Lucene, Sphinx, Postgresql, MySQL?
...hich can be used to implement 'did you mean ?' sphinxsearch.com/docs/devel.html#sphinxql-call-suggest
– Vinod K
Aug 2 '17 at 7:42
...
What are deferred objects?
...is when we make calls to a server to fetch some data from a database or an HTML page. If those calls were not asynchronous, the user interface will be stuck waiting for the server to respond. This asynchronous nature leads to a problem when you want to execute things in an order, for example, you wa...
What are the calling conventions for UNIX & Linux system calls (and user-space functions) on i386 an
...nfocenter.arm.com/help/index.jsp?topic=/com.arm.doc.subset.swdev.abi/index.html
https://developer.apple.com/library/ios/documentation/Xcode/Conceptual/iPhoneOSABIReference/iPhoneOSABIReference.pdf
ARM64 convention:
http://infocenter.arm.com/help/topic/com.arm.doc.ihi0055b/IHI0055B_aapcs64.pdf
Fo...
Do you (really) write exception safe code? [closed]
...ng the STL exception safe:
http://www.boost.org/community/exception_safety.html
Look at the 7th point (Automated testing for exception-safety), where he relies on automated unit testing to make sure every case is tested. I guess this part is an excellent answer to the question author's "Can you even...