Merge pull request #20 from pedropark99/data-structures

Add chapter for Data structures

Chapters/01-zig-weird.qmd

@@ -783,6 +783,15 @@ const ls = [_]f64{432.1, 87.2, 900.05};
 _ = ns; _ = ls;
 ```
 
+Is worth noting that these are static arrays, meaning that
+they cannot grow in size.
+Once you declare your array, you cannot change the size of it.
+This is very commom in low level languages.
+Because low level languages normally wants to give you (the programmer) full control over memory,
+and the way in which arrays are expanded is tightly related to
+memory management.
+
+
 ### Selecting elements of the array
 
 One very commom activity is to select specific portions of an array
@@ -915,7 +924,7 @@ try stdout.print("{any}\n", .{c});
 ```
 
 
-## Blocks and scopes
+## Blocks and scopes {#sec-blocks}
 
 Blocks are created in Zig by a pair of curly braces. A block is just a group of
 expressions (or statements) contained inside of a pair of curly braces. All of these expressions that

ZigExamples/data-structures/generic_array.zig

@@ -0,0 +1,13 @@
+const std = @import("std");
+fn Array(comptime T: type) type {
+    return struct {
+        items: []T,
+        size: usize,
+    };
+}
+
+pub fn main() !void {
+    var buffer: [5]u8 = undefined;
+    const ar = Array(u8){ .items = &buffer, .size = 0 };
+    std.debug.print("{any}\n", .{@TypeOf(ar)});
+}