Otzberg.net Website Review

for a project i needed to validate a 13 digit isbn. according to wikipedia you can validate an isbn by calculating the checksum, but more accurately calculating the check-digit of an isbn as follows: the isbn-13 check digit, which is the last digit of the isbn, must range. swift 4: an extension to define uicolors with “normal” rgb values and set some named colors. uicolors require you to enter red, green and blue as values between 0 and 1. in pracitcal terms that means you need to divide your values by 255 to obtain the cgfloat required. easy enough? surely! still it is a tad annoying, especially as the rest of the world will give you rgb tableviews can have a useful feature to refresh the data inside of them, simply pull to refresh. apple didn’t invent this, that was loren brichter of tweetie, which was sold to twitter and twitter was eventually granted a patent for the feature. today this feature is i have no apps in the app store, but a while ago i wrote an app for my own edutainment, which needed to parse json data. at the time it was so darn complicated, that i enlisted cocoapods and swiftyjson to help make things easier. swiftjson is pretty cool as it abstracts away a i sure am going to be unpopular, but i don’t get why an app is allowed to make “silent” network requests – in other words: i don’t get why the network indicator isn’t shown by the os to alert users that there is network activity going on. however if you have a i needed to convert a unix timestamp, which for some inexplicit reason was being returned as a string by an api i was using and this is the super foolish function i ended up with. i am not going to shame the api provider for returning a timestamp as a string