data analyst • mediapart
Advent of Code - Day 10
test = `[({(<(())[]>[[{[]{<()<>>
[(()[<>])]({[<{<<[]>>(
{([(<{}[<>[]}>{[]{[(<()>
(((({<>}<{<{<>}{[]{[]{}
[[<[([]))<([[{}[[()]]]
[{[{({}]{}}([{[{{{}}([]
{<[[]]>}<{[{[{[]{()[[[]
[<(<(<(<{}))><([]([]()
<{([([[(<>()){}]>(<<{{
<{([{{}}[<[[[<>{}]]]>[]]`.split("\n")
openings = Array.from("([{<")
closings = Array.from(")]}>")
score = [3,57,1197,25137]
findCorrupted = (line) => {
let seq = Array.from(line)
let errors = []
let os = []
seq.forEach((c, i) => {
if (openings.includes(c)) os.push(c)
if (closings.includes(c)) {
if (closings.indexOf(c) != openings.indexOf(os[os.length-1])) errors.push(c)
else os.pop()
}
})
return errors
}
computeTotal = (input) => input.map(findCorrupted)
.filter(l => l.length > 0)
.map(e => score[closings.indexOf(e[0])])
.reduce((a,b) => a+b)
computeTotal(test)
computeTotal(input)
computeIncomplete = (input)=>{
let incompletes = input.map(findCorrupted).map((e,i) => [e,i]).filter(x => x[0].length == 0).map(x => input[x[1]])
let completions = []
incompletes.forEach((line,i) =>{
let seq = Array.from(line)
let os = []
seq.forEach((c, i) => {
if (openings.includes(c)) os.push(c)
if (closings.includes(c)) os.pop()
})
completions[i] = os.reverse().map(c => openings.indexOf(c)+1).reduce((p,c) => p*5 + c, 0)
})
return completions.sort((a,b)=> a - b)[completions.length/2 - 0.5]
}
computeIncomplete(test)
computeIncomplete(input)
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