Created
October 12, 2010 20:27
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// Ported from http://blog.inspirit.ru/wp-content/uploads/qsort/Main.as | |
function flashSort( array ) { | |
var a = array, n = array.length; | |
var i = 0, j = 0, k = 0, t, hold, flash; | |
var m = ~~( n * 0.125 ); | |
var l = [], anmin = a[ 0 ], nmax = 0, nmove = 0; | |
while ( ++i < n ) { | |
if ( a[ i ] < anmin ) anmin = a[ i ]; | |
if ( a[ i ] > a[ nmax ] ) nmax = i; | |
} | |
if ( anmin == a[ nmax ] ) return; | |
var c1 = ( m - 1 ) / ( a[ nmax ] - anmin ); | |
i = 0; | |
while ( i < m ) l[ i++ ] = 0; | |
i = 0; | |
while ( i < n ) { | |
k = ~~( c1 * ( a[ i++ ] - anmin ) ); | |
++l[ k ]; | |
} | |
k = 0; | |
while ( ++k < m ) { | |
l[ k ] += l[ k - 1 ]; | |
} | |
hold = a[ nmax ]; | |
a[ nmax ] = a[ 0 ]; | |
a[ 0 ] = hold; | |
j = 0; | |
k = m - 1; | |
i = n - 1; | |
while ( nmove < i ) { | |
while ( j > ( l[ k ] - 1 ) ) { | |
k = ~~( c1 * ( a[ ++j ] - anmin ) ); | |
} | |
flash = a[ j ]; | |
while ( j != l[ k ] ) { | |
k = ~~( c1 * ( flash - anmin ) ); | |
hold = a[ ( t = l[ k ]-1) ]; | |
a[ t ] = flash; | |
flash = hold; | |
--l[ k ]; | |
++nmove; | |
} | |
} | |
j = 0; | |
while ( ++j < n ) { | |
hold = a[ j ]; | |
i = j - 1; | |
while ( i >= 0 && a[ i ] > hold ) { | |
a[ i + 1 ] = a[ i-- ]; | |
} | |
a[ i + 1 ] = hold; | |
} | |
} |
Yup :)
Seems to be 2x times faster than array.sort( function ( a, b ) { return a - b; } );
nice to know...
but it's very compressed and it's unreadable...
Yeah, it's designed to be fast rather than readable.
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Sorting algorithmen?or what that? :D