43 lines
862 B
JavaScript
43 lines
862 B
JavaScript
import * as Strategy from Solver.Strategy;
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import {diagonal, plus} from Geometry.Vector;
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return {
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find: find
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};
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function find(zones, lines) {
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var cellSets = zones.concat(lines.rows).concat(lines.columns);
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return Strategy.map(
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stepOfCell(cellSets),
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Strategy.tryEach(cellSets.map(getSingleCellIn))
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);
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}
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function getSingleCellIn(cellSet) {
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return function() {
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if(cellSet.size() == 1) {
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return cellSet.getAll(function(v) {return v;})[0];
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}
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};
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}
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function stepOfCell(cellSets) {
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return function(cell) {
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return {
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reason: 'singleCell',
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empty: toEmpty(cell).intersection(cellSets),
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star: CellSet.cells([cell])
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};
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};
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}
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function toEmpty(cell) {
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var around = CellSet.rectangle(plus(cell, diagonal(-1)), diagonal(2));
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around.remove(v);
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return CellSet.union([
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around,
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CellSet.row(v.getRow()),
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CellSet.column(v.getColumn())
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]);
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}
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