Bryan Oltman bryanoltman
jstn
/ RandomNumbers.swift
Last active
May 5, 2023 03:26
generate random numbers for 64-bit types while mitigating modulo bias
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| /* | |
| `arc4random_uniform` is very useful but limited to `UInt32`. | |
| This defines a generic version of `arc4random` for any type | |
| expressible by an integer literal, and extends some numeric | |
| types with a `random` method that mitigates for modulo bias | |
| in the same manner as `arc4random`. | |
| `lower` is inclusive and `upper` is exclusive, thus: | |
steipete
/ PSPDFUIKitMainThreadGuard.m
Last active
May 27, 2024 12:11
This is a guard that tracks down UIKit access on threads other than main. This snippet is taken from the commercial iOS PDF framework http://pspdfkit.com, but relicensed under MIT. Works because a lot of calls internally call setNeedsDisplay or setNeedsLayout. Won't catch everything, but it's very lightweight and usually does the job.You might n…
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| // Taken from the commercial iOS PDF framework http://pspdfkit.com. | |
| // Copyright (c) 2014 Peter Steinberger, PSPDFKit GmbH. All rights reserved. | |
| // Licensed under MIT (http://opensource.org/licenses/MIT) | |
| // | |
| // You should only use this in debug builds. It doesn't use private API, but I wouldn't ship it. | |
| // PLEASE DUPE rdar://27192338 (https://openradar.appspot.com/27192338) if you would like to see this in UIKit. | |
| #import <objc/runtime.h> | |
| #import <objc/message.h> |