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133 lines
4.0 KiB
133 lines
4.0 KiB
/**
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*
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*/
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var SelectionSort = function() {
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var _this = this;
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this.ui = {
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//
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presort: function presort(arr) {
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_this
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.instruct(Itemgroup.background, 1, 0, 0, arr.length, Visualizer.bg0)
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.instruct(Itemgroup.message, 0, 0, 1, `Comparisons: ${_this.comparisons}`)
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.instruct(Itemgroup.message, 0, 0, 2, `Swaps: ${_this.swaps}`)
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.instruct(Itemgroup.message, 0, 0, 3, ``)
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.instruct(Itemgroup.message, 0, 0, 4, ``)
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.instruct(Itemgroup.message, 0, 100, 5, `Starting sort.`)
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},
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//
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midsort: function midsort(arr, i, j, min) {
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_this
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.instruct(Itemgroup.background, 1, 0, 0, arr.length, Visualizer.bg0)
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.instruct(Itemgroup.background, 1, 0, j, j, Visualizer.bg1)
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.instruct(Itemgroup.background, 1, 0, i, i, '#435C11')
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.instruct(Itemgroup.message, 0, 0, 1, `Comparisons: ${_this.comparisons}`)
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.instruct(Itemgroup.message, 0, 0, 3, `Current value: ${arr[i]}`)
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.instruct(Itemgroup.message, 0, 0, 4, `Current minimum: ${arr[min]}`)
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.instruct(Itemgroup.message, 0, 100, 5, `Comparing: ${arr[min]} and ${arr[j]}`)
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},
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//
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newmin: function newmin(arr, min) {
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_this
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.instruct(Itemgroup.message, 0, 0, 4, `New minimum: ${arr[min]}`)
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.instruct(Itemgroup.message, 0, 100, 5, ``)
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},
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//
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swap: function swap(arr, i, min) {
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_this
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.instruct(Itemgroup.background, 1, 0, 0, arr.length, Visualizer.bg0)
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.instruct(Itemgroup.background, 1, 0, i, i, Visualizer.bg1)
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.instruct(Itemgroup.background, 1, 0, min, min, Visualizer.bg1)
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.instruct(Itemgroup.message, 0, 0, 2, `Swaps: ${_this.swaps}`)
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.instruct(Itemgroup.message, 0, 0, 4, ``)
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.instruct(Itemgroup.message, 0, 0, 5, `Swap current and minimum.`)
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.instruct(Itemgroup.swap, 1, 300, i, min)
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},
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//
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postsort: function postsort(arr) {
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_this
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.instruct(Itemgroup.background, 1, 0, 0, arr.length, Visualizer.bg0)
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.instruct(Itemgroup.message, 0, 0, 1, `Comparisons: ${_this.comparisons}`)
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.instruct(Itemgroup.message, 0, 0, 2, `Swaps: ${_this.swaps}`)
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.instruct(Itemgroup.message, 0, 0, 3, ``)
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.instruct(Itemgroup.message, 0, 0, 4, ``)
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.instruct(Itemgroup.message, 0, 100, 5, `Sorting complete.`)
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},
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};
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};
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SelectionSort.prototype = Object.create(Sorter.prototype);
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/**
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*
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*/
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SelectionSort.prototype.init = function() {
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var len = this.shuffled.length;
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this.actions = [];
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this.swaps = 0;
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this.comparisons = 0;
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this
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.instruct(Itemgroup.items, 0, 0, len)
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.instruct(Itemgroup.items, 1, 0, len)
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.instruct(Itemgroup.items, 2, 0, len)
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for (var i = 0; i < len; i++) {
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this.instruct(Itemgroup.text, 1, 0, i, this.shuffled[i]);
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}
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this
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.instruct(Itemgroup.foreground, 1, 0, 0, len, Visualizer.fg0)
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.instruct(Itemgroup.background, 1, 0, 0, len, Visualizer.bg0)
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.instruct(Itemgroup.opacity, 0, 0, 0, len, 0)
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.instruct(Itemgroup.opacity, 2, 0, 0, len, 0)
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};
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/**
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*
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*/
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SelectionSort.prototype.sort = function(arr) {
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var len = arr.length;
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var i;
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var j;
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var tmp;
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var min;
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this.ui.presort(arr);
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for (i = 0; i < len; i++) {
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min = i;
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for (j = i + 1; j < len; j++) {
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this.comparisons++;
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this.ui.midsort(arr, i, j, min);
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if (arr[j] < arr[min]) {
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min = j;
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this.ui.newmin(arr, min);
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}
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}
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if (min !== i) {
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this.swaps++;
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tmp = arr[i];
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arr[i] = arr[min];
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arr[min] = tmp;
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this.ui.swap(arr, i, min);
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}
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}
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this.ui.postsort(arr);
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return arr;
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};
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