this repo has no description
Day 6!
+599
-5
+33
-5
index.js
+33
-5
index.js
···
6
6
*/
7
7
var Day1 = require('./lib/day1');
8
8
var day1Input = fs.readFileSync('./input/day1.txt', 'utf8');
9
-
var day1Part1Answer = require('./lib/day1').floorCount(day1Input);
10
-
var day1Part2Answer = require('./lib/day1').entersBasementAt(day1Input);
9
+
10
+
var day1Part1Answer = Day1.floorCount(day1Input);
11
+
var day1Part2Answer = Day1.entersBasementAt(day1Input);
12
+
11
13
console.log('Day 1, Part 1:', day1Part1Answer);
12
14
console.log('Day 1, Part 2:', day1Part2Answer);
13
15
14
-
// TODO: Go back and redo days 1 - 3, for consistency :)
16
+
// TODO: Go back and redo days 2 & 3, for consistency :)
15
17
16
-
/**
18
+
/*
17
19
* Day 4!
18
20
* ----------------------------------
19
21
*/
20
22
var Day4 = require('./lib/day4');
21
23
var day4Input = fs.readFileSync('./input/day4.txt', 'utf8').replace(/[^A-z0-9]/g, '');
24
+
22
25
var day4Part1Answer = Day4.adventCoinSecret(day4Input, '00000');
23
26
var day4Part2Answer = Day4.adventCoinSecret(day4Input, '000000');
27
+
24
28
console.log('Day 4, Part 1:', day4Part1Answer);
25
29
console.log('Day 4, Part 2:', day4Part2Answer);
26
30
27
-
/**
31
+
/*
28
32
* Day 5!
29
33
* ----------------------------------
30
34
*/
31
35
var Day5 = require('./lib/day5');
32
36
var day5Input = fs.readFileSync('./input/day5.txt', 'utf8');
37
+
33
38
var niceStringCount1 = 0;
34
39
var niceStringCount2 = 0;
40
+
35
41
day5Input.split('\n').forEach(function(str) {
36
42
if (Day5.isStringNice1(str)) niceStringCount1++;
37
43
if (Day5.isStringNice2(str)) niceStringCount2++;
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44
});
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+
39
46
console.log('Day 5, Part 1:', niceStringCount1);
40
47
console.log('Day 5, Part 2:', niceStringCount2);
48
+
49
+
/**
50
+
* Day 6!
51
+
* ----------------------------------
52
+
*/
53
+
var Day6 = require('./lib/day6');
54
+
var day6Input = fs.readFileSync('./input/day6.txt', 'utf8');
55
+
56
+
var grid1 = Day6.buildGrid(1000, 1000);
57
+
day6Input.split('\n').forEach(function(instruction) {
58
+
grid1 = Day6.processInstruction1(grid1, instruction);
59
+
});
60
+
var count = Day6.countLightsOn(grid1);
61
+
console.log('Day 6, Part 1:', count);
62
+
63
+
var grid2 = Day6.buildGrid(1000, 1000);
64
+
day6Input.split('\n').forEach(function(instruction) {
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+
grid2 = Day6.processInstruction2(grid2, instruction);
66
+
});
67
+
var totalBrightness = Day6.totalBrightness(grid2);
68
+
console.log('Day 6, Part 2:', totalBrightness);
+300
input/day6.txt
+300
input/day6.txt
···
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+120
lib/day6.js
+120
lib/day6.js
···
1
+
var R_PARSE_INSTRUCTION = /^(.+)\s(\d+),(\d+)\sthrough\s(\d+),(\d+)/;
2
+
3
+
module.exports = {
4
+
5
+
processInstruction1: function(grid, instruction) {
6
+
var parts = instruction.match(R_PARSE_INSTRUCTION);
7
+
8
+
if (!parts) return grid; // Invalid instruction
9
+
10
+
var command = parts[1];
11
+
var from = [parseInt(parts[2]), parseInt(parts[3])];
12
+
var to = [parseInt(parts[4]), parseInt(parts[5])];
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+
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+
switch (command) {
15
+
case 'turn on': return this.turnOn(grid, from, to);
16
+
case 'turn off': return this.turnOff(grid, from, to);
17
+
case 'toggle': return this.toggle(grid, from, to);
18
+
}
19
+
},
20
+
21
+
processInstruction2: function(grid, instruction) {
22
+
var parts = instruction.match(R_PARSE_INSTRUCTION);
23
+
24
+
if (!parts) return grid; // Invalid instruction
25
+
26
+
var command = parts[1];
27
+
var from = [parseInt(parts[2]), parseInt(parts[3])];
28
+
var to = [parseInt(parts[4]), parseInt(parts[5])];
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+
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+
switch (command) {
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+
case 'turn on': return this.increaseBrightness(grid, from, to);
32
+
case 'turn off': return this.reduceBrightness(grid, from, to);
33
+
case 'toggle':
34
+
return this.increaseBrightness(
35
+
this.increaseBrightness(grid, from, to),
36
+
from, to);
37
+
}
38
+
},
39
+
40
+
buildGrid: function(x, y) {
41
+
var grid = [];
42
+
43
+
for (var i = 0; i < y; i++) {
44
+
grid.push([]);
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+
}
46
+
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+
grid.forEach(function(row) {
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+
for (var i = 0; i < x; i++) {
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+
row.push(0);
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+
}
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+
});
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+
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+
return grid;
54
+
},
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+
56
+
turnOn: function(grid, from, to) {
57
+
return setGridValues(grid, from, to, 1);
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+
},
59
+
turnOff: function(grid, from, to) {
60
+
return setGridValues(grid, from, to, 0);
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+
},
62
+
toggle: function(grid, from, to) {
63
+
return setGridValues(grid, from, to, 'toggle');
64
+
},
65
+
increaseBrightness: function(grid, from, to) {
66
+
return changeGridValues(grid, from, to, 1);
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+
},
68
+
reduceBrightness: function(grid, from, to) {
69
+
return changeGridValues(grid, from, to, -1);
70
+
},
71
+
72
+
countLightsOn: function(grid) {
73
+
var count = 0;
74
+
75
+
grid.forEach(function(row) {
76
+
row.forEach(function(light) {
77
+
if (light) count++;
78
+
});
79
+
});
80
+
81
+
return count;
82
+
},
83
+
84
+
totalBrightness: function(grid) {
85
+
var total = 0;
86
+
87
+
grid.forEach(function(row) {
88
+
row.forEach(function(light) {
89
+
total += light;
90
+
});
91
+
});
92
+
93
+
return total;
94
+
}
95
+
};
96
+
97
+
function setGridValues(grid, from, to, value) {
98
+
var newGrid = grid;
99
+
for (var i = from[0]; i <= to[0]; i++) {
100
+
for (var j = from[1]; j <= to[1]; j++) {
101
+
if (value === 'toggle') {
102
+
newGrid[i][j] = grid[i][j] === 0 ? 1 : 0;
103
+
} else {
104
+
newGrid[i][j] = value;
105
+
}
106
+
}
107
+
}
108
+
return grid;
109
+
}
110
+
111
+
function changeGridValues(grid, from, to, value) {
112
+
var newGrid = grid;
113
+
for (var i = from[0]; i <= to[0]; i++) {
114
+
for (var j = from[1]; j <= to[1]; j++) {
115
+
newGrid[i][j] = grid[i][j] + (value);
116
+
if (newGrid[i][j] < 0) newGrid[i][j] = 0;
117
+
}
118
+
}
119
+
return grid;
120
+
}
+146
spec/day6.spec.js
+146
spec/day6.spec.js
···
1
+
var expect = require('chai').expect;
2
+
var Day6 = require('../lib/day6');
3
+
4
+
describe('Day6', function() {
5
+
var grid;
6
+
7
+
beforeEach(function() {
8
+
grid = Day6.buildGrid(2, 3);
9
+
});
10
+
11
+
describe('#buildGrid', function() {
12
+
it('builds a grid of booleans from specified dimensions', function() {
13
+
expect(grid).to.eql([
14
+
[0, 0],
15
+
[0, 0],
16
+
[0, 0]
17
+
]);
18
+
});
19
+
});
20
+
21
+
describe('#turnOn', function() {
22
+
it('makes sure lights are ON in specified range', function() {
23
+
grid = Day6.turnOn(grid, [0,0], [1,1]);
24
+
expect(grid).to.eql([
25
+
[1, 1],
26
+
[1, 1],
27
+
[0, 0]
28
+
]);
29
+
});
30
+
});
31
+
32
+
describe('#turnOff', function() {
33
+
it('makes sure lights are OFF in specified range', function() {
34
+
grid = Day6.turnOn(grid, [0,0], [1,1]);
35
+
grid = Day6.turnOff(grid, [0,1], [1,1]);
36
+
37
+
expect(grid).to.eql([
38
+
[1, 0],
39
+
[1, 0],
40
+
[0, 0]
41
+
]);
42
+
});
43
+
});
44
+
45
+
describe('#toggle', function() {
46
+
it('TOGGLES the lights at specified range', function() {
47
+
grid = Day6.turnOn(grid, [0,0], [1,1]);
48
+
grid = Day6.toggle(grid, [0,1], [1,1]);
49
+
50
+
expect(grid).to.eql([
51
+
[1, 0],
52
+
[1, 0],
53
+
[0, 0]
54
+
]);
55
+
});
56
+
});
57
+
58
+
describe('#reduceBrightness', function() {
59
+
it('reduces the brightness of specified range by 1, to a min of 0', function() {
60
+
grid = Day6.toggle(grid, [0,0], [2,1]);
61
+
grid = Day6.reduceBrightness(grid, [0,0], [0,1]);
62
+
grid = Day6.reduceBrightness(grid, [0,0], [0,1]);
63
+
64
+
expect(grid).to.eql([
65
+
[0, 0],
66
+
[1, 1],
67
+
[1, 1]
68
+
]);
69
+
});
70
+
});
71
+
72
+
describe('#increaseBrightness', function() {
73
+
it('increase the brightness of a specified range by 1', function() {
74
+
grid = Day6.toggle(grid, [0,0], [2,1]);
75
+
grid = Day6.increaseBrightness(grid, [0,0], [0,1]);
76
+
77
+
expect(grid).to.eql([
78
+
[2, 2],
79
+
[1, 1],
80
+
[1, 1]
81
+
]);
82
+
});
83
+
});
84
+
85
+
describe('#totalBrightness', function() {
86
+
it('calculates the total brightness of all lights in the grid', function() {
87
+
grid = Day6.toggle(grid, [0,0], [2,1]);
88
+
89
+
expect(grid).to.eql([
90
+
[1, 1],
91
+
[1, 1],
92
+
[1, 1]
93
+
]);
94
+
95
+
expect(Day6.totalBrightness(grid)).to.equal(6);
96
+
});
97
+
});
98
+
99
+
describe('#processInstruction1', function() {
100
+
it('turns a text instruction into a command with to and from coords', function() {
101
+
var instructions = [
102
+
'turn on 0,0 through 1,1',
103
+
'turn off 0,1 through 1,1',
104
+
'toggle 0,0 through 2,0'
105
+
];
106
+
107
+
instructions.forEach(function(instruction) {
108
+
grid = Day6.processInstruction1(grid, instruction);
109
+
});
110
+
111
+
expect(grid).to.eql([
112
+
[0, 0],
113
+
[0, 0],
114
+
[1, 0]
115
+
]);
116
+
});
117
+
});
118
+
119
+
describe('#processInstruction2', function() {
120
+
it('turns a text instruction into a command with to and from coords', function() {
121
+
var instructions = [
122
+
'turn off 0,0 through 2,1',
123
+
'turn on 0,0 through 1,1',
124
+
'turn off 0,1 through 1,1',
125
+
'toggle 0,0 through 2,0'
126
+
];
127
+
128
+
instructions.forEach(function(instruction) {
129
+
grid = Day6.processInstruction2(grid, instruction);
130
+
});
131
+
132
+
expect(grid).to.eql([
133
+
[3, 0],
134
+
[3, 0],
135
+
[2, 0]
136
+
]);
137
+
});
138
+
});
139
+
140
+
describe('#countLightsOn', function() {
141
+
it('returns the number of lights that are on', function() {
142
+
grid = Day6.turnOn(grid, [0,0], [1,0]);
143
+
expect(Day6.countLightsOn(grid)).to.equal(2);
144
+
});
145
+
});
146
+
});