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scrap3.js
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scrap3.js
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// parse input (return 2D array)
// iterate through array
// check array[i][0] for:
// 2 letters: 1
// 3 letters: 7
// 4 letters: 4
// 7 letters: 8
// count instances of above numbers in array[i][1]
function readInput(fileName) {
const fs = require('fs');
let inputArray = [];
let resultArray = [];
try {
const data = fs.readFileSync(fileName, 'UTF-8');
const lines = data.split(/\r?\n/);
lines.forEach((line) => {
inputArray.push(line);
});
} catch (err) {
console.error(err);
}
inputArray.forEach((line) => {
resultArray.push(line.split(' | '));
});
return resultArray;
}
function count1748(fileName) {
const resultArray = readInput(fileName);
const digitsArray = [];
// ...huge amounts of this next chunk is unnecessary
// (it's a double of the section underneath it - one loops through the first chunk to establish the numbers)
const digitsArray2 = [];
for (let i = 0; i < resultArray.length; i++) {
const numbers = resultArray[i][0].split(' ');
const digits = ['0', '0', '0', '0'];
let lettersIn1 = '';
let lettersIn3 = '';
let lettersIn6 = '';
// (each digit)
for (let i = 0; i < numbers.length; i++) {
let sortedLetters = numbers[i].split('').sort().join('');
if (numbers[i].length === 2) {
lettersIn1 = sortedLetters;
console.log('lettersIn1', lettersIn1);
}
}
for (let i = 0; i < numbers.length; i++) {
let sortedLetters = numbers[i].split('').sort().join('');
if (numbers[i].length === 5 && sortedLetters.includes(lettersIn1)) {
digits[i] = '3';
lettersIn3 = sortedLetters;
console.log('lettersIn3 1', lettersIn3);
}
}
for (let i = 0; i < numbers.length; i++) {
let sortedLetters = numbers[i].split('').sort().join('');
// 3 would have length of 5 and contain the two letters in 1
// 2 would have a length of 5; the letter that's in 6 but not in 5 would be in 2
// the other with a length of 5 would be 5
// (all letters in 5 are in 6)
// 9 would have length of 6 and contain the two letters in 1 (so would 0)
// 9 has all the letters in 3
// 6 would be the other with the length of 6
switch(numbers[i].length) {
case 2:
digits[i] = '1';
break;
case 3:
digits[i] = '7';
break;
case 4:
digits[i] = '4';
break;
case 7:
digits[i] = '8';
break;
case 5:
if (sortedLetters.includes(lettersIn1)) {
digits[i] = '3';
lettersIn3 = sortedLetters;
console.log('lettersIn3 2', lettersIn3);
}
break;
}
}
for (let i = 0; i < numbers.length; i++) {
let sortedLetters = numbers[i].split('').sort().join('');
if (numbers[i].length === 2) {
lettersIn1 = sortedLetters;
console.log('lettersIn1', lettersIn1);
}
switch(numbers[i].length) {
// 6 has length of 6 and does not include the letters in 1
// case 6:
// if (sortedLetters.includes(lettersIn1)) {
// // distinguish between 9 and 0
// if (sortedLetters.includes(lettersIn3)) {
// digits[i] = '9';
// } else {
// digits[i] = '0';
// }
// } else {
// digits[i] = '6';
// lettersIn6 = sortedLetters;
// }
case 6:
// if (!sortedLetters.includes(lettersIn1)) {
if (sortedLetters.includes(lettersIn1) === false) {
digits[i] = '6';
lettersIn6 = sortedLetters;
console.log('lettersIn6', lettersIn6);
} else if (sortedLetters.includes(lettersIn3)) {
digits[i] = '9';
} else {
digits[i] = '0';
}
break;
}
}
for (let i = 0; i < numbers.length; i++) {
let sortedLetters = numbers[i].split('').sort().join('');
if (numbers[i].length === 2) {
// console.log(lettersIn1);
lettersIn1 = sortedLetters;
// console.log(lettersIn1);
console.log('lettersIn1', lettersIn1);
}
switch(numbers[i].length) {
case 5:
// console.log(lettersIn1);
if (sortedLetters.includes(lettersIn1) === false) {
// if (!sortedLetters.includes(lettersIn1)) {
// distinguish between 2 and 5
console.log(lettersIn6, sortedLetters);
if (lettersIn6.includes(sortedLetters)) {
digits[i] = '5';
} else {
digits[i] = '2';
}
}
break;
}
}
digitsArray2.push(digits);
}
// ...until here
// there's a reason this loops through again, separately
// (each line)
for (let i = 0; i < resultArray.length; i++) {
const numbers = resultArray[i][1].split(' ');
const digits = ['0', '0', '0', '0'];
let lettersIn1 = '';
let lettersIn3 = '';
let lettersIn6 = '';
// (each digit)
for (let i = 0; i < numbers.length; i++) {
let sortedLetters = numbers[i].split('').sort().join('');
if (numbers[i].length === 2) {
lettersIn1 = sortedLetters;
console.log('lettersIn1', lettersIn1);
}
}
for (let i = 0; i < numbers.length; i++) {
let sortedLetters = numbers[i].split('').sort().join('');
if (numbers[i].length === 5 && sortedLetters.includes(lettersIn1)) {
digits[i] = '3';
lettersIn3 = sortedLetters;
console.log('lettersIn3 1', lettersIn3);
}
}
for (let i = 0; i < numbers.length; i++) {
let sortedLetters = numbers[i].split('').sort().join('');
// 3 would have length of 5 and contain the two letters in 1
// 2 would have a length of 5; the letter that's in 6 but not in 5 would be in 2
// the other with a length of 5 would be 5
// (all letters in 5 are in 6)
// 9 would have length of 6 and contain the two letters in 1 (so would 0)
// 9 has all the letters in 3
// 6 would be the other with the length of 6
switch(numbers[i].length) {
case 2:
digits[i] = '1';
break;
case 3:
digits[i] = '7';
break;
case 4:
digits[i] = '4';
break;
case 7:
digits[i] = '8';
break;
case 5:
if (sortedLetters.includes(lettersIn1)) {
digits[i] = '3';
lettersIn3 = sortedLetters;
console.log('lettersIn3 2', lettersIn3);
}
break;
}
}
for (let i = 0; i < numbers.length; i++) {
let sortedLetters = numbers[i].split('').sort().join('');
if (numbers[i].length === 2) {
lettersIn1 = sortedLetters;
console.log('lettersIn1', lettersIn1);
}
switch(numbers[i].length) {
// 6 has length of 6 and does not include the letters in 1
// case 6:
// if (sortedLetters.includes(lettersIn1)) {
// // distinguish between 9 and 0
// if (sortedLetters.includes(lettersIn3)) {
// digits[i] = '9';
// } else {
// digits[i] = '0';
// }
// } else {
// digits[i] = '6';
// lettersIn6 = sortedLetters;
// }
case 6:
// if (!sortedLetters.includes(lettersIn1)) {
if (sortedLetters.includes(lettersIn1) === false) {
digits[i] = '6';
lettersIn6 = sortedLetters;
console.log('lettersIn6', lettersIn6);
} else if (sortedLetters.includes(lettersIn3)) {
digits[i] = '9';
} else {
digits[i] = '0';
}
break;
}
}
for (let i = 0; i < numbers.length; i++) {
let sortedLetters = numbers[i].split('').sort().join('');
if (numbers[i].length === 2) {
// console.log(lettersIn1);
lettersIn1 = sortedLetters;
// console.log(lettersIn1);
console.log('lettersIn1', lettersIn1);
}
switch(numbers[i].length) {
case 5:
// console.log(lettersIn1);
if (sortedLetters.includes(lettersIn1) === false) {
// if (!sortedLetters.includes(lettersIn1)) {
// distinguish between 2 and 5
console.log(lettersIn6, sortedLetters);
if (lettersIn6.includes(sortedLetters)) {
digits[i] = '5';
} else {
digits[i] = '2';
}
}
break;
}
}
digitsArray.push(digits);
}
console.log(digitsArray);
return digitsArray;
}
let assert = require('assert');
function runTests() {
// console.log(readInput('day8TestInput.txt'));
count1748('day8TestInput2.txt');
// assert.equal(26, count1748('day8TestInput.txt'));
// assert.equal(397, count1748('day8Input.txt'));
}
runTests();