You should use basic_ios::imbue to set the preferred locale. Take a look here: http://www.cplusplus.com/reference/ios/ios_base/imbue/ Locales allow you to use the preferred way by the user, so if a computer in Italy uses comma to separate decimal digits, in the US the dot is still used. Using locales is a Good Practice. But if you want … Read more
decimal module comes in handy. >>> from decimal import * >>> getcontext().prec = 100 >>> Decimal(2).sqrt() Decimal(‘1.414213562373095048801688724209698078569671875376948073176679737990732478462107038850387534327641573’)
According to the specification, a DecimalLiteral is defined as: DecimalLiteral :: DecimalIntegerLiteral . DecimalDigitsopt ExponentPartopt . DecimalDigits ExponentPartopt DecimalIntegerLiteral ExponentPartopt and for satisfying the parseFloat argument: Let inputString be ToString(string). Let trimmedString be a substring of inputString consisting of the leftmost character that is not a StrWhiteSpaceChar and all characters to the right of that … Read more
If you’re doing this to several fields, or doing it quite often, then perhaps a plugin is the answer. Here’s the beginnings of a jQuery plugin that formats the value of a field to two decimal places. It is triggered by the onchange event of the field. You may want something different. <script type=”text/javascript”> // … Read more
string.Format is your friend. String.Format(“{0:0.00}”, 123.4567); // “123.46”
Tip for CSV exports: SELECT REPLACE(CAST(prijs_incl AS CHAR), ‘.’, ‘,’) will give you input that can be used as numeric fields in european excelsheets.
Actually, valueOf uses parseInt internally. The difference is parseInt returns an int primitive while valueOf returns an Integer object. Consider from the Integer.class source: public static int parseInt(String s) throws NumberFormatException { return parseInt(s, 10); } public static Integer valueOf(String s, int radix) throws NumberFormatException { return Integer.valueOf(parseInt(s, radix)); } public static Integer valueOf(String s) … Read more
A workaround (until Google fix this bug) is to use an EditText with android:inputType=”numberDecimal” and android:digits=”0123456789.,”. Then add a TextChangedListener to the EditText with the following afterTextChanged: public void afterTextChanged(Editable s) { double doubleValue = 0; if (s != null) { try { doubleValue = Double.parseDouble(s.toString().replace(‘,’, ‘.’)); } catch (NumberFormatException e) { //Error } } … Read more
You may do it the locale-aware way: import locale # Set to users preferred locale: locale.setlocale(locale.LC_ALL, ”) # Or a specific locale: locale.setlocale(locale.LC_NUMERIC, “en_DK.UTF-8”) print locale.atof(“3,14”) Read this section before using this method.
I think that there is a more simple approach to all given here, and is the method Number.toFixed() already implemented in JavaScript. simply write: var myNumber = 2; myNumber.toFixed(2); //returns “2.00” myNumber.toFixed(1); //returns “2.0” etc…