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61 lines
1.2 KiB
61 lines
1.2 KiB
/**
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*
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*/
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var Sorter = function() {};
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// NOTE fisher-yates, http://bost.ocks.org/mike/algorithms/
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/**
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* Returns copy of an array shuffled using Fisher-Yates.
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*/
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Sorter.prototype.shuffle = function(arr) {
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var result = Object.create(arr);
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var n = result.length, t, i;
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while (n) {
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i = Math.random() * n-- | 0; // 0 ≤ i < n
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t = result[n];
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result[n] = result[i];
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result[i] = t;
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}
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return result;
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};
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/**
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*
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*/
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Sorter.prototype.generate = function(n) {
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var arr = [];
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var v;
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for (var i = 0; i < n; i++) {
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v = Math.floor(i * 255 / n);
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arr.push({
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value: v,
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fill: `rgb(0, 0, ${v})`
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});
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};
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return arr;
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};
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/**
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*
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*/
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Sorter.prototype.swap = function(arr, i, j) {
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// console.info(`swapping ${arr[i].value} and ${arr[j].value}`)
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var tmp = arr[i];
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arr[i] = arr[j];
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arr[j] = tmp;
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};
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/**
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*
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*/
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Sorter.prototype.sort = function(instruction) {
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throw new Error('Sorter.sort() method override required.');
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};
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/**
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*
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*/
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Sorter.prototype.addInstruction = function(instruction) {
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throw new Error('Sorter.addInstruction() method override required.');
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};
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