If you’re not bothered about too much control, and just want a generally darker version of a colour, then: col = (col & 0xfefefe) >> 1; Is a nice quick way to halve a colour value (assuming it’s packed as a byte per channel, obviously). In the same way brighter would be: col = (col … Read more
Just use a for loop to go through each couple of characters in the string, convert them to a character and then whack the character on the end of a string builder: String hex = “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”; StringBuilder output = new StringBuilder(); for (int i = 0; i < hex.length(); i+=2) { String str = hex.substring(i, … Read more
It turns out it is possible, although that surprised me. Section 3.10.2 of the JLS gives the structure of floating point literals, including HexadecimalFloatingPointLiteral. public class Test { public static void main(String[] args) { double d1 = 0xAAAAAAAAAAAAAAAAAAp0d; double d2 = 0x1.8p1d; System.out.println(d1); // A very big number System.out.println(d2); // 24 = 1.5 * 2^1 … Read more
By default, jQuery serializes the data (passed in data property) – and it means 0xFD008001 number gets passed to the server as ‘4244668417’ string (10 bytes, not 4), that’s why the server treats it not as expected. It’s necessary to prevent such behaviour by setting $.ajax property processData to false: By default, data passed in … Read more
Python’s integers can grow arbitrarily large. In order to compute the raw two’s-complement the way you want it, you would need to specify the desired bit width. Your example shows -199703103 in 64-bit two’s complement, but it just as well could have been 32-bit or 128-bit, resulting in a different number of 0xf‘s at the … Read more
The accepted answer does not consider leading zeros which may cause problems This question answers it. Depending on whether you want to see how its done or just use a java built-in method. Here are the solutions copied from this and this answers respectively from the SO question mentioned. Option 1: Util method public static … Read more
Horrible abuse of exceptions. Don’t ever do this! (It’s not me, it’s Josh Bloch’s Effective Java). Anyway, I suggest private static final Pattern HEXADECIMAL_PATTERN = Pattern.compile(“\\p{XDigit}+”); private boolean isHexadecimal(String input) { final Matcher matcher = HEXADECIMAL_PATTERN.matcher(input); return matcher.matches(); }
It depends on the background to which your transparent color will be applied. But if you know the color of the background (e.g. white), you can calculate the RGB color resulting of the RGBA color applied to the specific background. It’s just the weighted average between the color and the background, the weight being the … Read more
No need to find replace. Just use. M-x delete-trailing-whitespace You can also set the file encoding through C-x RET f unix
There are several potential solutions to this: • adjusting your variable to use rgb values so you can easily add an alpha in CSS: :root { –blue: 0, 0, 255; } .blue-with-alpha{ color: rgba(var(–blue), 0.44); } • you could also add alpha as a variable: :root { –blue: 0, 0, 255; –alpha: .44; } .blue-with-alpha{ … Read more