How can I convert words to numbers in JavaScript?
Example: “Nineteen days from now” would become “19 days from now”.
I’m fine with using jQuery or another library – hopefully a smallish one if it’s not jQuery.
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Here’s my JavaScript replacement of @Greg Hewgill’s Python module, minus the testing from the bottom of the code:
I got hung up a bit on the RegEx-ing and the for-each bug in IE, but here it is. A fairly decent conversion from Python to JavaScript, if I can say so myself, which I can’t. It needs some work – “One hundred and twenty” won’t work – but it’s good enough for now. Of course, thanks to @Greg Hewgill for the original, written in Python.
var Small = {
'zero': 0, 'one': 1, 'two': 2, 'three': 3, 'four': 4, 'five': 5, 'six': 6, 'seven': 7, 'eight': 8, 'nine': 9, 'ten': 10,
'eleven': 11, 'twelve': 12, 'thirteen': 13, 'fourteen': 14, 'fifteen': 15, 'sixteen': 16, 'seventeen': 17, 'eighteen': 18, 'nineteen': 19,
'twenty': 20, 'thirty': 30, 'forty': 40, 'fifty': 50, 'sixty': 60, 'seventy': 70, 'eighty': 80, 'ninety': 90 };
var Magnitude = {
'thousand': 1000,
'million': 1000000,
'billion': 1000000000,
'trillion': 1000000000000,
'quadrillion': 1000000000000000,
'quintillion': 1000000000000000000,
'sextillion': 1000000000000000000000,
'septillion': 1000000000000000000000000,
'octillion': 1000000000000000000000000000,
'nonillion': 1000000000000000000000000000000,
'decillion': 1000000000000000000000000000000000,
};
var a, n, g;
function text2num(s) {
a = s.toString().split(/[s-]+/);
n = 0;
g = 0;
a.forEach(feach);
return n + g;
}
function feach(w) {
var x = Small[w];
if (x != null) {
g = g + x;
} else if (w == "hundred") {
g = g * 100;
} else {
x = Magnitude[w];
if (x != null) {
n = n + g * x
g = 0;
} else {
console.log("Unknown number: " + w);
}
}
}
console.log(text2num("one thousand two hundred fifteen")); // Outputs: 1215
console.log(text2num("one thousand fifteen")); // Outputs: 1015
console.log(text2num("fifteen")); // Outputs: 159
This is an (really) old thread but if somebody else stumbles across I have made a node module inspired by the answers above that does all the above which can also:
- handle dashes and commas
- match multiple numbers in a string
- fuzzy match the number words
- interpret decimal places
Here’s the link: Words To Numbers
4
I wrote a little module for Python that does this: https://github.com/ghewgill/text2num/blob/master/text2num.py
It should be straightforward to convert that to Javascript.
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