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| author | Dave Gauer <dave@ratfactor.com> | 2021-02-28 13:23:22 -0500 |
|---|---|---|
| committer | Dave Gauer <dave@ratfactor.com> | 2021-02-28 13:23:22 -0500 |
| commit | b12afaa577e5f9b0c3bf922ec5c1ab15893c7378 (patch) | |
| tree | c8a5be6d30f4b44ea6124064fcf3e399876ab661 /exercises/46_optionals2.zig | |
| parent | febc9dfecb5285cdaa9f4e9edb4d8331a1f1350c (diff) | |
| download | ziglings-b12afaa577e5f9b0c3bf922ec5c1ab15893c7378.tar.gz ziglings-b12afaa577e5f9b0c3bf922ec5c1ab15893c7378.tar.bz2 ziglings-b12afaa577e5f9b0c3bf922ec5c1ab15893c7378.tar.xz ziglings-b12afaa577e5f9b0c3bf922ec5c1ab15893c7378.zip | |
Added ex 48, additional comment on 46
Diffstat (limited to 'exercises/46_optionals2.zig')
| -rw-r--r-- | exercises/46_optionals2.zig | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/exercises/46_optionals2.zig b/exercises/46_optionals2.zig index a037382..d3f65bb 100644 --- a/exercises/46_optionals2.zig +++ b/exercises/46_optionals2.zig @@ -5,11 +5,23 @@ // linked to the first elephant. This is because we had NO CONCEPT // of a tail that didn't point to another elephant! // +// We also introduce the handy ".?" shortcut: +// +// const foo = bar.?; +// +// is the same as +// +// const foo = bar orelse unreachable; +// +// See if you can find where we use this shortcut below. +// +// Now let's make those elephant tails optional! +// const std = @import("std"); const Elephant = struct { letter: u8, - tail: *Elephant = null, // <---- make this optional! + tail: *Elephant = null, // Hmm... tail needs something... visited: bool = false, }; |