jordiboehme

+(CGFloat)pixelToPoints:(CGFloat)px {
    CGFloat pointsPerInch = 72.0; // see: http://en.wikipedia.org/wiki/Point%5Fsize#Current%5FDTP%5Fpoint%5Fsystem
    CGFloat scale = 1; // We dont't use [[UIScreen mainScreen] scale] as we don't want the native pixel, we want pixels for UIFont - it does the retina scaling for us
    float pixelPerInch; // aka dpi
    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
        pixelPerInch = 132 * scale;
    } else if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) {
        pixelPerInch = 163 * scale;
    } else {
        pixelPerInch = 160 * scale;

zumbojo

# Simple bijective function
#   Basically encodes any integer into a base(n) string,
#     where n is ALPHABET.length.
#   Based on pseudocode from http://stackoverflow.com/questions/742013/how-to-code-a-url-shortener/742047#742047

ALPHABET =
  "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789".split(//)
  # make your own alphabet using:
  # (('a'..'z').to_a + ('A'..'Z').to_a + (0..9).to_a).shuffle.join