52 lines
1.7 KiB
Zig
52 lines
1.7 KiB
Zig
//
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// Now that we've learned about arrays, we can talk about strings.
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//
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// We've already seen Zig string literals: "Hello world.\n"
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//
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// Zig stores strings as arrays of bytes.
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//
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// const foo = "Hello";
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//
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// Is the same as:
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//
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// const foo = [_]u8{ 'H', 'e', 'l', 'l', 'o' };
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//
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// Notice how individual characters use single quotes ('H') and
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// strings use double quotes ("H"). These are not interchangeable!
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//
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const std = @import("std");
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pub fn main() void {
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const ziggy = "stardust";
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// (Problem 1)
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// Use array square bracket syntax to get the letter 'd' from
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// the string "stardust" above.
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const d: u8 = ziggy[4];
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// (Problem 2)
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// Use the array repeat '**' operator to make "ha ha ha ".
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const laugh = "ha " ** 3;
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// (Problem 3)
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// Use the array concatenation '++' operator to make "Major Tom".
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// (You'll need to add a space as well!)
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const major = "Major";
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const tom = "Tom";
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const major_tom = major ++ " " ++ tom;
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// That's all the problems. Let's see our results:
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std.debug.print("d={u} {s}{s}\n", .{ d, laugh, major_tom });
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// Keen eyes will notice that we've put 'u' and 's' inside the '{}'
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// placeholders in the format string above. This tells the
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// print() function to format the values as a UTF-8 character and
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// UTF-8 strings respectively. If we didn't do this, we'd see '100',
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// which is the decimal number corresponding with the 'd' character
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// in UTF-8. (And an error in the case of the strings.)
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//
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// While we're on this subject, 'c' (ASCII encoded character)
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// would work in place for 'u' because the first 128 characters
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// of UTF-8 are the same as ASCII!
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//
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}
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