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"use strict;";
let output = [];
pandigital(["1"]);
for (i in output) {
console.log(["", output[i]].join("\t"));
}
function pandigital(state) {
let digits = {};
let numbers = [];
// we have the first five, we're done
if (output.length > 4) {
return;
}
// there was some duplicate issues, so we use
// indexOf to see if that value is in the array
// already
if (state.length == 10) {
let pandigit = state.join("");
if (output.indexOf(pandigit) === -1) {
output.push(pandigit);
return;
}
}
// I think I would normally prefer if
// for ( i in array ) would give me the value
// within the array not the index, but there
// are enough times that I want just that, so
// I don't need that change
for (let i in state) {
let n = state[i];
digits[n] = 1;
}
// the long way around getting a range
let range = Array(10)
.fill()
.map((n, i) => i);
// yes, I could've probably written a filter,
// but this is understandable
for (let i in range) {
if (digits[i] === undefined) {
numbers.push(i);
}
}
// the duplicates issue was related to
// losing track of the parens, so that
// this loop was inside the range loop
// above, but it works and I've featured
// the cool indexOf method, so I'll let
// the belt-and-suspenders solution stand.
for (let i in numbers) {
let n = numbers[i];
let newstate = [...state];
newstate.push(n);
pandigital(newstate);
}
}
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