Hacking With Swift
summary
Clones the Swift repo, opens the standard library in a playground and demonstrates six concrete techniques: rethrows used to make functions only throw when their closure throws, precondition to fail early (Swift itself calls it 256 times), staticString to replace forced try for compile-time literals, contiguous arrays and reserveCapacity tradeoffs for performance, and contains(where) composition. Shows real source lines, git checkout to an older tag, grep counts, working playground demos and a custom composition operator that composes functions and prints results.
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chapters (12)
- 0:00Introduction and setup
- 3:04Why study Swift standard library
- 7:19Boolean operator overloading
- 9:28Wreath throws keyword
- 10:13Nil coalescing operator
- 14:48Assert and precondition functions
- 19:35Static string literals
- 23:26Custom map implementation
- 26:01Contiguous arrays and reserve capacity
- 33:09All satisfy method
- 36:17Function composition
- 44:53Key takeaways and conclusion
