day3-1.js « day3 - Advent Of Code (2020) - Solutions for 2020 Advent Of Code (https://adventofcode.com)

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path: root/day3/day3-1.js

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const data = require('./data')

let trees = 0;
data.forEach((line, i) => {
  line[(3 * i)%line.length] === "#" && (trees += 1)
})

console.log(trees)