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Day 5 part 2
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-12
+6
-3
index.js
+6
-3
index.js
···
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*/
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var Day5 = require('./lib/day5');
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var day5Input = fs.readFileSync('./input/day5.txt', 'utf8');
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var niceStringCount = 0;
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var niceStringCount1 = 0;
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var niceStringCount2 = 0;
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day5Input.split('\n').forEach(function(str) {
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if (Day5.isStringNice(str)) niceStringCount++;
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if (Day5.isStringNice1(str)) niceStringCount1++;
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if (Day5.isStringNice2(str)) niceStringCount2++;
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});
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console.log('Day 5, Part 1:', niceStringCount);
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console.log('Day 5, Part 1:', niceStringCount1);
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console.log('Day 5, Part 2:', niceStringCount2);
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-5
lib/day5.js
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-5
lib/day5.js
···
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var BAD_COMBOS = ['ab', 'cd', 'pq', 'xy'];
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module.exports = {
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isStringNice: function(str) {
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isStringNice1: function(str) {
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return (
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this.hasThreeVowels(str) &&
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this.hasDoubleLetter(str) &&
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!this.hasBadCombos(str)
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);
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},
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+
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isStringNice2: function(str) {
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return (
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this.hasThreeVowels(str)
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&& this.hasDoubleLetter(str)
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&& !this.hasBadCombos(str)
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this.hasRepeatWithBreak(str) &&
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this.hasMatchingPairs(str)
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);
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},
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···
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if (chars[i] === lastChar) return true;
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lastChar = chars[i];
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}
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return false;
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},
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···
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for (var i = 0; i < BAD_COMBOS.length; i++) {
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if (str.indexOf(BAD_COMBOS[i]) !== -1) return true;
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}
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return false;
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},
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hasMatchingPairs: function(str) {
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var currentPair = null;
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for (var i = 0; i < str.length; i++) {
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var remainderOfStr = str.substring(i + 2, str.length);
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currentPair = str[i] + str[i + 1];
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if (remainderOfStr.indexOf(currentPair) !== -1) {
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return true;
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}
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}
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return false;
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},
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hasRepeatWithBreak: function(str) {
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var currentChar = null;
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+
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for (var i = 0; i < str.length; i++) {
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currentChar = str[i];
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if (str[i+2] == currentChar) return true;
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}
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return false;
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}
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};
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-4
spec/day5.spec.js
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spec/day5.spec.js
···
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});
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});
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describe('#isStringNice', function() {
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it('checks for all three nice conditions', function() {
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describe('#hasMatchingPairs', function() {
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it('finds matching pairs of any two letters', function() {
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var goodStr = 'abasdofijabfji';
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var badStr = 'absdoifjojsf';
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expect(Day5.hasMatchingPairs(goodStr)).to.equal(true);
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expect(Day5.hasMatchingPairs(badStr)).to.equal(false);
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});
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it('does not count pairs that overlap', function() {
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var badStr = 'jiosdfaaabxo';
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expect(Day5.hasMatchingPairs(badStr)).to.equal(false);
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});
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});
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describe('#hasRepeatWithBreak', function() {
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it('finds a repeated letter with one letter in between', function() {
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var goodStrings = ['xnsabaf', 'fbdaaa', 'dsoinfnsa'];
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var badStrings = ['fajsdol', 'aosidjf', 'fjdosiap'];
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goodStrings.forEach(function(str) {
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expect(Day5.hasRepeatWithBreak(str)).to.equal(true);
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})
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badStrings.forEach(function(str) {
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expect(Day5.hasRepeatWithBreak(str)).to.equal(false);
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})
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});
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});
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describe('#isStringNice1', function() {
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it('checks hasThreeVowels, hasDoubleLetter and !hasBadCombos', function() {
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var goodStrings = ['aeibb', 'oouidd', 'lkajlsdffie'];
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var badStrings = ['bbbbbbb', 'abbei', 'aeiobx'];
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goodStrings.forEach(function(str) {
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expect(Day5.isStringNice(str)).to.equal(true);
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expect(Day5.isStringNice1(str)).to.equal(true);
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});
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badStrings.forEach(function(str) {
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expect(Day5.isStringNice1(str)).to.equal(false);
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});
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});
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});
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describe('#isStringNice2', function() {
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it('checks hasRepeatWithBreak and hasMatchingPairs', function() {
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var goodStrings = ['abfjdsioaba', 'djojdj', 'aspobibsp'];
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var badStrings = ['asdaf', 'basdgf', 'poiqhbo'];
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goodStrings.forEach(function(str) {
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expect(Day5.isStringNice2(str)).to.equal(true);
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});
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badStrings.forEach(function(str) {
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expect(Day5.isStringNice(str)).to.equal(false);
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expect(Day5.isStringNice2(str)).to.equal(false);
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});
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});
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});