as casts are fundamentally different from From conversions. From conversions are “simple and safe” whereas as casts are purely “safe”. When considering numeric types, From conversions exist only when the output is guaranteed to be the same, i.e. there is no loss of information (no truncation or flooring or loss of precision). as casts, however, … Read more
The usual way to convert an Int to a Double is to use fromIntegral, which has the type (Integral a, Num b) => a -> b. This means that it converts an Integral type (Int and Integer) to any numeric type b, of which Double is an instance. Your case sounds like you want to … Read more
I attached an on(‘change’) event to the input you want to have trailing 0’s $(‘.number-input’).on(‘change’, function(){ $(this).val(parseFloat($(this).val()).toFixed(2)); }); It just takes the value, casts it to a float, renders it to a string to the number of decimal places, and puts it back in as the value.
TL;DR Infinity used to be overwritable; Number.POSITIVE_INFINITY and Number.NEGATIVE_INFINITY have always been read only. Infinity is a property of the global object (window is the global object for Javascript run in the browser), whereas Number.POSITIVE_INFINITY is a property of the Number constructor. Prior to the 5th Edition of ECMAScript, value properties of the global object … Read more
Not sure why format would be so inconsistent but from memory the spec for it is…complex. Meantime, you can use the round function (ref). Which is less than perfect, but is functional. If you need to have a particular number of sig figs you can use THE POWER OF MATHS! and do something like: <xsl:value-of … Read more
Pick a 8 or 9 digit number at random, say 839712541. Then, take your order number’s binary representation (for this example, I’m not using 2’s complement), pad it out to the same number of bits (30), reverse it, and xor the flipped order number and the magic number. For example: 1 = 000000000000000000000000000001 Flip = … Read more
The reason they are not stored this way by default is that the range of valid values that can fit in a fixed set of bits is smaller. Your float class can store numbers between 1/MAXINT and MAXINT (plus or minus). A C/C++ float can represent numbers between 1E+37 and 1E-37 (plus or minus). In … Read more
You can use Random.Next(int maxValue): Return: A 32-bit signed integer greater than or equal to zero, and less than maxValue; that is, the range of return values ordinarily includes zero but not maxValue. However, if maxValue equals zero, maxValue is returned. var r = new Random(); // print random integer >= 0 and < 100 … Read more
>>> is the Zero-fill right shift operator. The >>> 0 is an abuse of the operator to convert any numeric expression to an “integer” or non-numeric expression to zero. Here is what it does: This operator shifts the first operand the specified number of bits to the right. Excess bits shifted off to the right … Read more
There are 2 integers between 1 and -2: 0 and -1 1 in binary is 00000000000000000000000000000001 0 in binary is 00000000000000000000000000000000 -1 in binary is 11111111111111111111111111111111 -2 in binary is 11111111111111111111111111111110 (“binary” being 2’s complement, in the case of a bitwise not ~ ) As you can see, it’s not very surprising ~1 equals -2, … Read more