I have a string value that will look like this:
"ZAR 200.15"
Using regex, how can I extract the float value to do calculations with?
For some context, I'm using javascript to access an HTML element's value like this:
var amountDueString = document.getElementById("amountDue").innerHTML;
Then I need to use regex to only get the float value.
var amountDue = amountDueString.match(---some regex---);
I want to extract the float value in order to compare it with user input.
Use regular expression to get number string and then use parseFloat to convert it to floating number
for (var x in arr = ["ZAR 200.15", "20.0", "21", "22.2", "22.20"]) {
// decimal part only
console.log(parseFloat(arr[x].match(/(\d+)(\.\d+)?/g)))
}I think the better way is the one commented by @anubhava :
/\b\d+(?:.\d+)?/
\b : assert position at a word boundary (^\w|\w$|\W\w|\w\W).
\d+ : match a digit [0-9],
Quantifier + Between one and unlimited times, as many times as possible, giving back as needed [greedy].
Quantifier ? Between zero and one time, as many times as possible, giving back as needed [greedy].
\. matches the character . literally
Hope this helps.
console.log( "ZAR 200.15".match(/\b\d+(?:.\d+)?/) );Try this:
(\d)+\.(\d+)
tested on notepad++
You can match number with decimals only or numbers with integer and decimal parts:
for (var x in arr = ["ZAR 200.15", "300.0", "1.02", "29.001", "10"]) {
// decimal part only
console.log(x, arr[x].match(/(\d+)(\.\d+)?/g))
// integer + decimal part
console.log(x, arr[x].match(/(\d+\.\d+)/g))
}Use the regex to find the floating number and then replace all the other word chars.
var str = "\"ZAR 200.15\"";
var patt = /[^(\d+)\.(\d+)]/g;
var string = str.replace(patt,"");
window.alert(string);
checkout here: here
/\b\d+(?:\.\d+)?/