26 lines
688 B
JavaScript
26 lines
688 B
JavaScript
var swap = require('./swap');
|
|
var isSorted = require('./isSorted');
|
|
exports = function(arr) {
|
|
var cmp =
|
|
arguments.length > 1 && arguments[1] !== undefined
|
|
? arguments[1]
|
|
: isSorted.defComparator;
|
|
var len = arr.length;
|
|
var gap = Math.floor(len / 2);
|
|
while (gap > 0) {
|
|
for (var i = gap; i <= len - gap; i++) {
|
|
for (var j = i; j > 0; j -= gap) {
|
|
if (cmp(arr[j], arr[j - gap]) < 0) {
|
|
swap(arr, j, j - gap);
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
gap = Math.floor(gap / 2);
|
|
}
|
|
return arr;
|
|
};
|
|
|
|
module.exports = exports;
|