The parameter has this syntax: {minIntegerDigits}.{minFractionDigits}-{maxFractionDigits} So your example of ‘1.2-2’ means: A minimum of 1 digit will be shown before decimal point It will show at least 2 digits after decimal point But not more than 2 digits
Be sure to use .8m instead of .8.
Here’s an elegant solution: void getBin(int num, char *str) { *(str+5) = ‘\0’; int mask = 0x10 << 1; while(mask >>= 1) *str++ = !!(mask & num) + ‘0’; } Here, we start by making sure the string ends in a null character. Then, we create a mask with a single one in it (its … Read more
Trying to do this is a mistake. Throwing more precision at a problem is a tempting trap for newcomers to floating-point, but it’s not that useful, especially to this extreme. Your operations wouldn’t actually require the “largest possible” precision even if that was a well-defined notion. Either they require exact arithmetic, in which case decimal.Decimal … Read more
You can use Erik Garrison’s fraction.js library to do that and more fractional operations. var f = new Fraction(2, 10000); console.log(f.numerator + “https://stackoverflow.com/” + f.denominator); To to do .003 you can just do var f = new Fraction(.003); console.log(f.numerator + “https://stackoverflow.com/” + f.denominator);
Sometimes you need to find a way to do it and rounding is acceptable. So if you decide what range of rounding works out for you you can build a function like this. To convert a decimal into the fraction that it most closely matches. You can extend the accuracy by adding more denominators to … Read more
These are talking about two slightly different things. The 7.2251 digits is the precision with which a number can be stored internally. For one example, if you did a computation with a double precision number (so you were starting with something like 15 digits of precision), then rounded it to a single precision number, the … Read more
Yes, you’d need to use Decimal.GetBits. Unfortunately, you then have to work with a 96-bit integer, and there are no simple integer type in .NET which copes with 96 bits. On the other hand, it’s possible that you could use Decimal itself… Here’s some code which produces the same numbers as your examples. Hope you … Read more
It is not (no longer) recommended you create a subclass; the json.dump() and json.dumps() functions take a default function: def decimal_default(obj): if isinstance(obj, decimal.Decimal): return float(obj) raise TypeError json.dumps({‘x’: decimal.Decimal(‘5.5’)}, default=decimal_default) Demo: >>> def decimal_default(obj): … if isinstance(obj, decimal.Decimal): … return float(obj) … raise TypeError … >>> json.dumps({‘x’: decimal.Decimal(‘5.5’)}, default=decimal_default) ‘{“x”: 5.5}’ The code you … Read more