math & informatics teacher
test1 = `1abc2
pqr3stu8vwx
a1b2c3d4e5f
treb7uchet`
test
(trebuchet1)
([
{input: test1, value: 142},
{input, value: 55447}
])
trebuchet1 = trebuchet(/^[^\d]*(\d).*(\d)|^[^\d]*(\d).*(\d)?/) // see https://regex101.com
trebuchet = R.curry(
(re) =>
R.pipe(
R.trim, // trim any blank lines, esp. at start and end or trip over them
R.split("\n"), // split into separate lines
R.map( // for each lines
R.pipe(
R.match(re), // match the RE
R.map((x) => word2number[x]), // map strings to numbers
convert, // convert number pairs to calibration value
)
),
R.sum, // calculate total sum of calibration values
)
)
trebuchet2 = trebuchet(re)
test2 = `two1nine
eightwothree
abcone2threexyz
xtwone3four
4nineeightseven2
zoneight234
7pqrstsixteen
`
test
(trebuchet2)
([
{input: test2, value: 281},
{input: "2", value: 22},
{input: "seven", value: 77},
{input, value: 54706}
])
// generate object with digit as key as text or number and its corresponding value
// so it can be used as ‘associative array’
word2number =
R.pipe(
R.split("|"),
R.addIndex(R.map)((key, i) => ({[key]: i + 1, [i + 1]: i + 1})),
R.mergeAll, // merge into single object
)
(one2nine)
one2nine = "one|two|three|four|five|six|seven|eight|nine"
digit = `\\d|${one2nine}` // RE for digit as number or text
// either two rigits in a row
// or just a single digit
re = new RegExp(`(${digit}).*(${digit}).*|(${digit})`)
value = (a, b) => 10 * a + b
// first value is matching string (so can be skipped), followed by match groups
convert = ([, deca, uni, single]) => single ? value(single, single) : value(deca, uni)
test = (ƒ) => R.map(({input, value}) => ƒ(input) === value)
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