32 lines
867 B
JavaScript
32 lines
867 B
JavaScript
function day5(input, part2) {
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let lines = input.split("\n").map((e) => e.split(" -> ").map((e) => new Point(...e.split(",").num())))
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if (!part2) {
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lines = lines.filter((e) => e[0].x == e[1].x || e[0].y == e[1].y)
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}
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let dict = {}
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for (let line of lines) {
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let xrange = utils.signAgnosticInclusiveRange(line[0].x, line[1].x)
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let yrange = utils.signAgnosticInclusiveRange(line[0].y, line[1].y)
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if (xrange.length == 1) {
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xrange = yrange.map(() => line[0].x)
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}
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if (yrange.length == 1) {
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yrange = xrange.map(() => line[0].y)
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}
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for (let i = 0; i < xrange.length; i++) {
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let x = xrange[i]
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let y = yrange[i]
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dict[[x, y]] = (dict[[x, y]] || 0) + 1
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}
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}
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return Object.values(dict).filter((e) => e > 1).length
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}
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