day1.js

const sampleData = [
  "1abc2",
  "pqr3stu8vwx",
  "a1b2c3d4e5f",
  "treb7uchet"
];



const solution = (input) => {
  const regex = /[0-9]/g;
  const justDigits = input.map((item) => {
    const match = item.match(regex);
    return match ? match.join('') : '';
  });

  const firstAndLast = justDigits.map((item) => {
    const first = item[0];
    const last = item[item.length - 1];
    return Number(first + last);
  });

  const result = firstAndLast.reduce((acc, item) => acc + item, 0);
  console.log(result);
};

const data = `
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`.split('\n').filter(x => x.length > 0);

//console.log(data);
solution(data);

const solution2 = (input) => {

  const modified = input.map(line => {
    let acc = '';
    line.split('').forEach((char, index) => {
      if (isNaN(parseInt(acc))) {
        acc += char;
      } else {
        return 
      }
    });
    return line;
  });
  console.log(modified);
  solution(modified);
};

const sample2 = `
two1nine
eightwothree
abcone2threexyz
xtwone3four
4nineeightseven2
zoneight234
7pqrstsixteen
`.split('\n').filter(x => x.length > 0);

solution2(sample2);