[swift-evolution] [Proposal] Random Unification
jhull at gbis.com
Thu Nov 30 18:02:02 CST 2017
> On Nov 30, 2017, at 3:52 PM, Dave DeLong <swift at davedelong.com> wrote:
> What is the useful distinction between generating a random value, and choosing a random element from a collection of all possible values?
I don’t have to generate (or keep in memory) that collection.
I gave an example before of an easy to add API for random colors which allow their saturation, lightness, and alpha to be fixed. I use something very similar all the time in some graphics code I have (varying only the hue or saturation). I also do the same with Sizes and CGVectors. How would you represent that as a collection to choose an element from?
Also, for most of my use cases, I *need* to be able to plug in a repeatably random source… otherwise pixels will start jumping around the screen when people resize things.
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