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.
How to convert a string to a number in JavaScript using the parseInt() function. Another way to convert a string into a number is to use the parseInt() function. This function takes in a string and an optional radix. A radix is a number between 2 and 36 which represents the base in a numeral system.
You convert a string to a number by calling the Parse or TryParse method found on numeric types ( int , long , double , and so on), or by using methods in the System. Convert class. It's slightly more efficient and straightforward to call a TryParse method (for example, int.
To convert a string to an integer parseInt() function is used in javascript. parseInt() function returns Nan( not a number) when the string doesn't contain number. If a string with a number is sent then only that number will be returned as the output. This function won't accept spaces.
Here's my JavaScript replacement of @Greg Hewgill's Python module, minus the testing from the bottom of the code:
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 {
alert("Unknown number: "+w);
}
}
}
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.
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:
Here's the link: Words To Numbers
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With