Remove all dots except the first one from a string

Question

Given a string

\'1.2.3.4.5\'

I would like to get this output

\'1.2345\'

(In case there are no dots in the

Answer 1

Based on @Tadek's answer above. This function takes other locales into consideration.

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For example, some locales will use a comma for the decimal separator and a period for the thousand separator (e.g. -451.161,432e-12).

First we convert anything other than 1) numbers; 2) negative sign; 3) exponent sign into a period ("-451.161.432e-12").

Next we split by period (["-451", "161", "432e-12"]) and pop out the right-most value ("432e-12"), then join with the rest ("-451161.432e-12")

(Note that I'm tossing out the thousand separators, but those could easily be added in the join step (.join(','))

var ensureDecimalSeparatorIsPeriod = function (value) {
    var numericString = value.toString();
    var splitByDecimal = numericString.replace(/[^\d.e-]/g, '.').split('.');
    if (splitByDecimal.length < 2) {
        return numericString;
    }
    var rightOfDecimalPlace = splitByDecimal.pop();
    return splitByDecimal.join('') + '.' + rightOfDecimalPlace;
};