blob: 2b08cbe1a52e9cf5686e918241c27bc0632a0b5d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
var multipliers = require('./lib/multipliers.js');
var digits = require('./lib/digits.js');
var utils = require('./lib/utils.js');
var BigNum = require('bignumber.js');
function parseTriple(str, useAnd, hasBigger) {
var hundredsDigit = 0;
var tensDigit = 0;
var onesDigit = 0;
var bottomPair = 0;
if (str.length === 3) {
hundredsDigit = utils.atoi(str[0]);
tensDigit = utils.atoi(str[1]);
onesDigit = utils.atoi(str[2]);
bottomPair = utils.atoi(str.substring(1, 3));
} else if (str.length === 2) {
tensDigit = utils.atoi(str[0]);
onesDigit = utils.atoi(str[1]);
bottomPair = utils.atoi(str);
} else if (str.length === 1) {
onesDigit = utils.atoi(str[0]);
bottomPair = onesDigit;
}
var parts = [];
if (hundredsDigit > 0 && digits.hasOwnProperty(hundredsDigit)) {
parts.push(digits[hundredsDigit]);
parts.push('hundred');
}
if (hundredsDigit > 0) {
hasBigger = true;
}
if (hasBigger && bottomPair > 0 && useAnd) {
parts.push('and');
}
if (bottomPair > 0 && digits.hasOwnProperty(bottomPair)) {
parts.push(digits[bottomPair]);
} else {
if (tensDigit > 0 && digits.hasOwnProperty(tensDigit * 10)) {
parts.push(digits[tensDigit * 10]);
}
if (onesDigit > 0 && digits.hasOwnProperty(onesDigit)) {
parts.push(digits[onesDigit]);
}
}
return parts;
};
function numToAlpha(input, useAnd) {
var bn = new BigNum(input).toString(10);
var parts = [];
var numString = bn;
if (bn[0] === '-') {
parts.push('negative');
numString = bn.substring(1, bn.length);
}
if (numString === '0') {
parts.push('zero');
} else {
var chunks = utils.chunkify(numString);
chunks.forEach(function(chunk, idx) {
var mult = chunks.length - idx - 1;
var useAndForChunk = useAnd && mult === 0;
var triple = parseTriple(chunk, useAndForChunk, chunks.length > 1);
if (triple.length > 0) {
Array.prototype.push.apply(parts, triple);
if (multipliers.hasOwnProperty(mult)) {
parts.push(multipliers[mult]);
}
}
});
}
return parts.join(' ');
};
module.exports = numToAlpha;
|