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Moved exercises to exercises because exercises

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This commit is contained in:
Dave Gauer 2021-02-09 18:36:57 -05:00
parent cf0920de31
commit 55ad7c32f2
45 changed files with 3 additions and 3 deletions
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49
33_iferror.zig
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@ -1,49 +0,0 @@
//
// Let's revisit the very first error exercise. This time, we're going to
// look at a special error-handling type of the "if" statement.
//
// if (foo) |value| {
//
// // foo was NOT an error; value is the non-error value of foo
//
// } else |err| {
//
// // foo WAS an error; err is the error value of foo
//
// }
//
// We'll take it even further and use a switch statement to handle
// the error types.
//
const MyNumberError = error{
TooBig,
TooSmall,
};
const std = @import("std");
pub fn main() void {
var nums = [_]u8{2,3,4,5,6};
for (nums) |num| {
std.debug.print("{}", .{num});
var n = numberMaybeFail(num);
if (n) |value| {
std.debug.print("=4. ", .{});
} else |err| switch (err) {
MyNumberError.TooBig => std.debug.print(">4. ", .{}),
// Please add a match for TooSmall here and have it print: "<4. "
}
}
std.debug.print("\n", .{});
}
// This time we'll have numberMaybeFail() return an error union rather
// than a straight error.
fn numberMaybeFail(n: u8) MyNumberError!u8 {
if(n > 4) return MyNumberError.TooBig;
if(n < 4) return MyNumberError.TooSmall;
return n;
}