https://duan.ca/tag/minute-swift/ <p>I guess I'm starting a series of minute-long videos. In this first video, I built <code>pwd</code> out of <code>getcwd</code>. The code turned out shorter than I imagined (1 line). Which is a good demonstration of Swift's great C-interop capability.</p> <div class="video-container"> <iframe width="560" height="315" src="https://www.youtube.com/embed/YR4MCcMnHrI" frameborder="0" gesture="media" allow="encrypted-media" allowfullscreen></iframe> </div> <p>Some details are lost in this video, however. For example, the POSIX standard actually says <code>getcwd</code>'s 2nd argument being <code>0</code> is undefined. Luckily, both macOS and Linux define it the way we want (allocate as much memory as needed). Swift's handling of <code>char *</code> aka <code>UnsafeMutablePointer&lt;CChar&gt;</code> in context of a <code>var</code> array is also very cool.</p> Wed, 27 Dec 2017 01:13:07 -0800 https://duan.ca/2017/12/27/building-pwd-under-1-minute-in-swift/ https://duan.ca/2017/12/27/building-pwd-under-1-minute-in-swift/