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exo4.js
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exo4.js
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import R from 'ramda'
const debug = R.tap(console.log)
function _magic (path) {
const lines = R.split(/\n/g, path)
const getCheckSum = R.compose(R.view(R.lensIndex(1)), R.match(/\[(\S*)]/))
const getSectorID = R.compose(parseInt, R.view(R.lensIndex(0)), R.match(/\w*[^-\D*]/g))
const mysort = (a, b) => {
const occ1 = R.prop(1, a)
const occ2 = R.prop(1, b)
const name1 = R.prop(0, a)
const name2 = R.prop(0, b)
// console.log(occ1, occ2, name1, name2)
// console.log(occ1 > occ2, occ1 < occ2, name1 < name2, name1 > name2)
if (occ1 > occ2) return 1
if (occ1 < occ2) return -1
if (name1 < name2) return 1
if (name1 > name2) return -1
return 0
}
const getName = R.compose(
R.join(''),
R.map(R.prop(0)),
R.slice(0, 5),
R.reverse,
R.sort(mysort),
R.toPairs,
R.map(R.length),
R.groupBy(R.identity),
R.replace(/-/g, ''),
R.prop(0),
R.match(/[a-z-]*[^-\d]/)
)
const getSourceName = R.compose(R.prop(0), R.match(/[a-z-]*[^-\d]/))
const parse = R.converge(
(checksum, sectorID, name, sourceName) => ({checksum, sectorID, name, sourceName}),
[ getCheckSum, getSectorID, getName, getSourceName ]
)
return R.map(parse, lines).filter(val => val.name === val.checksum)
}
export function exo41 (path) {
return R.reduce((acc, val) => acc + val.sectorID, 0, _magic(path))
}
export function exo42 (path, expected) {
const rooms = _magic(path)
return R.reduce((acc, x) => {
const roomName = R.compose(
R.join(' '),
R.map(R.join('')),
R.map(
R.map(
R.compose(w => String.fromCharCode(w + 97), R.modulo(R.__, 26), y => y.charCodeAt(0) + R.prop('sectorID', x) - 97))),
R.split('-'),
R.prop('sourceName')
)(x)
return (R.equals(roomName, expected)) ? R.prop('sectorID', x) : acc
}, '', rooms)
}