antonyharfield

// Result is a superpowered enum that can be Success or Failure
// and the basis for a railway junction
sealed class Result<T>
data class Success<T>(val value: T): Result<T>()
data class Failure<T>(val errorMessage: String): Result<T>()

// Composition: apply a function f to Success results
infix fun <T,U> Result<T>.then(f: (T) -> Result<U>) = 
    when (this) {
        is Success -> f(this.value)

alexfu

public class ColorUtils {
  private static final double LM_RED_COEFFICIENT = 0.2126;
  private static final double LM_GREEN_COEFFICIENT = 0.7152;
  private static final double LM_BLUE_COEFFICIENT = 0.0722;

  public static int calculateRelativeLuminance(int color) {
    int red = (int) (Color.red(color) * LM_RED_COEFFICIENT);
    int green = (int) (Color.green(color) * LM_GREEN_COEFFICIENT);
    int blue = (int) (Color.blue(color) * LM_BLUE_COEFFICIENT);
    return red + green + blue;

davidnunez

pm list packages -f