Learn Swift for free
Apple-flavoured systems language. Runs via the Swift toolchain. On Libre Academy you learn Swift for free by writing real code in an in-editor workbench, graded by hidden tests (desktop app (native toolchain)). No paywall, no sign-up.
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Swift courses
- Swift Challenges · Swift · 120 lessons
- Exercism Swift Track · Swift · 116 lessons
- Swiftlings · Swift · 94 lessons
Helpful reading
Why passive video doesn't make you a programmer · Bring Your Own Book: turning any PDF into a course