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Bookmark or Share- JavaScript math, round to two decimal places - Stack OverflowThis is the actual correct answer. I'd just add that for the specific discount scenario, the simplified code would be: var discount = Math.round(10000 * (1 - price / listprice)) / 100; @ChristopheRoussy, the example you provided is actually correct and this result is caused by the fact that base-2 floating point can't represent all base-10 decimals precisely.
- python - Check if a string contains a number - Stack Overflowdef contains_digit(s): isdigit = str.isdigit return any(map(isdigit,s)) in python 3 it's probably the fastest there (except maybe for regexes) is because it doesn't contain any loop (and aliasing the function avoids looking it up in str ).
- Regex to match digits of specific length - Stack OverflowAnd keep in mind that \d{15} will match fifteen digits anywhere in the line, including a 400-digit number. If you want to ensure it only has the fifteen, you use something like: ^\d{15}$ which uses the start and end anchors, or ^\D*\d{15}\D*$
- python - Does "\d" in regex mean a digit? - Stack OverflowDecimal digit character: \d \d matches any decimal digit. It is equivalent to the \p{Nd} regular expression pattern, which includes the standard decimal digits 0-9 as well as the decimal digits of a number of other character sets. If ECMAScript-compliant behavior is specified, \d is equivalent to [0-9].
- What every digit means in software version (1.7.1.0, for example)?It differs from vendor to vendor really. Most commonly, they are (in order): Major release number; Minor release number
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