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feat: add task human-readable-number #62

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feat: add task human-readable-number #62

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79 changes: 77 additions & 2 deletions src/index.js
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Original file line number Diff line number Diff line change
@@ -1,3 +1,78 @@
module.exports = function toReadable(/* number */) {
throw new Error('Not implemented');
module.exports = function toReadable(number) {
const ones = [
'zero',
'one',
'two',
'three',
'four',
'five',
'six',
'seven',
'eight',
'nine',
];
const teens = [
'ten',
'eleven',
'twelve',
'thirteen',
'fourteen',
'fifteen',
'sixteen',
'seventeen',
'eighteen',
'nineteen',
];
const tens = [
'',
'',
'twenty',
'thirty',
'forty',
'fifty',
'sixty',
'seventy',
'eighty',
'ninety',
];
const hundreds = [
'',
'one hundred',
'two hundred',
'three hundred',
'four hundred',
'five hundred',
'six hundred',
'seven hundred',
'eight hundred',
'nine hundred',
];

if (number === 0) {
return ones[0];
}

const parts = [];

const hundred = Math.floor(number / 100);
if (hundred > 0) {
parts.push(hundreds[hundred]);
}

const remainder = number % 100;

if (remainder >= 10 && remainder < 20) {
parts.push(teens[remainder - 10]);
} else {
const ten = Math.floor(remainder / 10);
if (ten > 0) {
parts.push(tens[ten]);
}
const one = remainder % 10;
if (one > 0) {
parts.push(ones[one]);
}
}

return parts.join(' ');
};