mirror of
https://codeberg.org/andyscott/ziglings.git
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Merge branch 'main' of https://codeberg.org/ziglings/exercises
This commit is contained in:
commit
0c1643b722
GPG key ID:
7CD5A5977E4931C1
6 changed files with 159 additions and 56 deletions
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@ -15,7 +15,7 @@ const print = std.debug.print;
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// 1) Getting Started
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// 2) Version Changes
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comptime {
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const required_zig = "0.13.0-dev.339";
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const required_zig = "0.14.0-dev.42";
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const current_zig = builtin.zig_version;
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const min_zig = std.SemanticVersion.parse(required_zig) catch unreachable;
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if (current_zig.order(min_zig) == .lt) {
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@ -459,7 +459,7 @@ fn resetLine() void {
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pub fn trimLines(allocator: std.mem.Allocator, buf: []const u8) ![]const u8 {
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var list = try std.ArrayList(u8).initCapacity(allocator, buf.len);
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var iter = std.mem.split(u8, buf, " \n");
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var iter = std.mem.splitSequence(u8, buf, " \n");
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while (iter.next()) |line| {
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// TODO: trimming CR characters is probably not necessary.
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const data = std.mem.trimRight(u8, line, " \r");
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@ -521,7 +521,7 @@ fn validate_exercises() bool {
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return false;
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}
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var iter = std.mem.split(u8, ex.output, "\n");
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var iter = std.mem.splitScalar(u8, ex.output, '\n');
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while (iter.next()) |line| {
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const output = std.mem.trimRight(u8, line, " \r");
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if (output.len != line.len) {
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@ -45,7 +45,7 @@
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// output. Escape sequences can also be written one after the
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// other, e.g. "\n\n" will cause two line feeds.
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//
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// By the way, the result of these escape sequences are passed
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// By the way, the result of these escape sequences is passed
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// directly to the terminal program. Other than translating them
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// into control codes, escape sequences have nothing to do with
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// Zig. Zig knows nothing about "line feeds" or "tabs" or
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@ -95,7 +95,7 @@
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// ...
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//
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// Without string formatting, this would be a more challenging
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// assignment because the number of digits in the numbers vary
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// assignment because the number of digits in the numbers varies
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// from 1 to 3. But formatting can help us with that.
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//
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const std = @import("std");
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@ -1,22 +1,22 @@
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//
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// Until now, we've only been printing our output in the console,
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// which is good enough for fighting alien and hermit bookkeeping.
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// which is good enough for fighting aliens and hermit bookkeeping.
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//
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// However, many other task require some interaction with the file system,
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// However, many other tasks require some interaction with the file system,
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// which is the underlying structure for organizing files on your computer.
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//
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// The File System provide a hierarchical structure for storing files
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// by organizing files into directories, which hold files and other directories,
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// thus creating a tree structure for navigating.
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// The file system provides a hierarchical structure for storing files
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// by organizing them into directories, which hold files and other directories,
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// thus creating a tree structure that can be navigated.
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//
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// Fortunately, zig standard library provide a simple api for interacting
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// with the file system, see the detail documentation here
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// Fortunately, the Zig standard library provides a simple API for interacting
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// with the file system, see the detail documentation here:
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//
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// https://ziglang.org/documentation/master/std/#std.fs
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//
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// In this exercise, we'll try to
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// - create a new directory
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// - open a file in the directory
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// In this exercise, we'll try to:
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// - create a new directory,
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// - open a file in the directory,
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// - write to the file.
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//
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// import std as always
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@ -27,42 +27,42 @@ pub fn main() !void {
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const cwd: std.fs.Dir = std.fs.cwd();
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// then we'll try to make a new directory /output/
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// to put our output files.
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// to store our output files.
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cwd.makeDir("output") catch |e| switch (e) {
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// there are chance you might want to run this
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// there is a chance you might want to run this
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// program more than once and the path might already
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// been created, so we'll have to handle this error
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// have been created, so we'll have to handle this error
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// by doing nothing
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//
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// we want to catch error.PathAlreadyExists and do nothing
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??? => {},
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// if is any other unexpected error we just propagate it through
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// if there's any other unexpected error we just propagate it through
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else => return e,
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};
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// then we'll try to open our freshly created directory
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// wait a minute
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// wait a minute...
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// opening a directory might fail!
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// what should we do here?
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var output_dir: std.fs.Dir = cwd.openDir("output", .{});
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defer output_dir.close();
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// we try to open the file `zigling.txt`,
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// and propagate the error up if there are any errors
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// and propagate any error up
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const file: std.fs.File = try output_dir.createFile("zigling.txt", .{});
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// it is a good habit to close a file after you are done with it
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// so that other programs can read it and prevent data corruption
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// but here we are not yet done writing to the file
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// if only there were a keyword in zig that
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// allows you "defer" code execute to the end of scope...
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// if only there were a keyword in Zig that
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// allowed you to "defer" code execution to the end of the scope...
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file.close();
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// !you are not allowed to switch these two lines above the file closing line!
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// you are not allowed to move these two lines above the file closing line!
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const byte_written = try file.write("It's zigling time!");
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std.debug.print("Successfully wrote {d} bytes.\n", .{byte_written});
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}
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// to check if you actually write to the file, you can either,
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// 1. open the file on your text editor, or
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// 1. open the file in your text editor, or
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// 2. print the content of the file in the console with the following command
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// >> cat ./output/zigling.txt
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//
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@ -86,7 +86,7 @@ pub fn main() !void {
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//
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// Question:
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// - what should you do if you want to also read the file after opening it?
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// - go to documentation of the struct `std.fs.Dir` here
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// - go to the documentation of the struct `std.fs.Dir` here:
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// https://ziglang.org/documentation/master/std/#std.fs.Dir
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// - can you find a function for opening a file? how about deleting a file?
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// - what kind of options can you use with those functions?
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@ -4,17 +4,17 @@
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// - create a file {project_root}/output/zigling.txt
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// with content `It's zigling time!`(18 byte total)
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//
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// Now there no point in writing to a file if we don't read from it am I right?
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// let's write a program to read the content of the file that we just created.
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// Now there's no point in writing to a file if we don't read from it, am I right?
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// Let's write a program to read the content of the file that we just created.
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//
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// I am assuming that you've created the appropriate files for this to work.
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//
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// Alright, bud, lean in close here's the game plan.
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// Alright, bud, lean in close. Here's the game plan.
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// - First, we open the {project_root}/output/ directory
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// - Secondly, we open file `zigling.txt` in that directory
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// - then, we initalize an array of characters with all letter 'A', and print it
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// - After that, we read the content of the file to the array
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// - Finally, we print out the read content
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// - Then, we initalize an array of characters with all letter 'A', and print it
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// - After that, we read the content of the file into the array
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// - Finally, we print out the content we just read
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const std = @import("std");
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@ -30,8 +30,8 @@ pub fn main() !void {
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const file = try output_dir.openFile("zigling.txt", .{});
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defer file.close();
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// initalize an array of u8 with all letter 'A'.
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// we need to pick the size of the array, 64 seems like a good number.
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// initalize an array of u8 with all letter 'A'
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// we need to pick the size of the array, 64 seems like a good number
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// fix the initalization below
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var content = ['A']*64;
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// this should print out : `AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA`
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@ -43,7 +43,7 @@ pub fn main() !void {
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// hint: you might find two answers that are both vaild in this case
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const bytes_read = zig_read_the_file_or_i_will_fight_you(&content);
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// Woah, too screamy, I know you're excited for zigling time but tone it down a bit
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// Woah, too screamy. I know you're excited for zigling time but tone it down a bit.
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// Can you print only what we read from the file?
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std.debug.print("Successfully Read {d} bytes: {s}\n", .{
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bytes_read,
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@ -1,16 +1,63 @@
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--- exercises/106_files.zig 2024-05-05 00:48:25.808548611 +0200
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+++ answers/106_files.zig 2024-05-05 01:00:40.742969819 +0200
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@@ -35,7 +35,7 @@
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--- exercises/106_files.zig 2024-06-17 10:11:53.651439869 +0200
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+++ answers/106_files.zig 2024-06-17 10:21:50.697337653 +0200
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@@ -1,22 +1,22 @@
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//
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// Until now, we've only been printing our output in the console,
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-// which is good enough for fighting aliens and hermit bookkeeping.
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+// which is good enough for fighting alien and hermit bookkeeping.
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//
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-// However, many other tasks require some interaction with the file system,
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+// However, many other task require some interaction with the file system,
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// which is the underlying structure for organizing files on your computer.
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//
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-// The file system provides a hierarchical structure for storing files
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-// by organizing them into directories, which hold files and other directories,
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-// thus creating a tree structure that can be navigated.
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+// The File System provide a hierarchical structure for storing files
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+// by organizing files into directories, which hold files and other directories,
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+// thus creating a tree structure for navigating.
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//
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-// Fortunately, the Zig standard library provides a simple API for interacting
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-// with the file system, see the detail documentation here:
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+// Fortunately, zig standard library provide a simple api for interacting
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+// with the file system, see the detail documentation here
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//
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// https://ziglang.org/documentation/master/std/#std.fs
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//
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-// In this exercise, we'll try to:
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-// - create a new directory,
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-// - open a file in the directory,
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+// In this exercise, we'll try to
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+// - create a new directory
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+// - open a file in the directory
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// - write to the file.
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//
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// import std as always
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@@ -27,42 +27,42 @@
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const cwd: std.fs.Dir = std.fs.cwd();
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// then we'll try to make a new directory /output/
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- // to store our output files.
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+ // to put our output files.
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cwd.makeDir("output") catch |e| switch (e) {
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- // there is a chance you might want to run this
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+ // there are chance you might want to run this
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// program more than once and the path might already
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- // have been created, so we'll have to handle this error
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+ // been created, so we'll have to handle this error
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// by doing nothing
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//
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// we want to catch error.PathAlreadyExists and do nothing
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- ??? => {},
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- // if there's any other unexpected error we just propagate it through
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+ error.PathAlreadyExists => {},
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// if is any other unexpected error we just propagate it through
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+ // if is any other unexpected error we just propagate it through
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else => return e,
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};
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@@ -44,7 +44,7 @@
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// wait a minute
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// then we'll try to open our freshly created directory
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- // wait a minute...
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+ // wait a minute
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// opening a directory might fail!
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// what should we do here?
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- var output_dir: std.fs.Dir = cwd.openDir("output", .{});
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@ -18,12 +65,36 @@
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defer output_dir.close();
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// we try to open the file `zigling.txt`,
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@@ -55,7 +55,7 @@
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- // and propagate any error up
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+ // and propagate the error up if there are any errors
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const file: std.fs.File = try output_dir.createFile("zigling.txt", .{});
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// it is a good habit to close a file after you are done with it
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// so that other programs can read it and prevent data corruption
|
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// but here we are not yet done writing to the file
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// if only there were a keyword in zig that
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// allows you "defer" code execute to the end of scope...
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- // if only there were a keyword in Zig that
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- // allowed you to "defer" code execution to the end of the scope...
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- file.close();
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+ // if only there were a keyword in zig that
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+ // allows you "defer" code execute to the end of scope...
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+ defer file.close();
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// !you are not allowed to switch these two lines above the file closing line!
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- // you are not allowed to move these two lines above the file closing line!
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+ // !you are not allowed to switch these two lines above the file closing line!
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const byte_written = try file.write("It's zigling time!");
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std.debug.print("Successfully wrote {d} bytes.\n", .{byte_written});
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}
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// to check if you actually write to the file, you can either,
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-// 1. open the file in your text editor, or
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+// 1. open the file on your text editor, or
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// 2. print the content of the file in the console with the following command
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// >> cat ./output/zigling.txt
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//
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@@ -86,7 +86,7 @@
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//
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// Question:
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// - what should you do if you want to also read the file after opening it?
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-// - go to the documentation of the struct `std.fs.Dir` here:
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+// - go to documentation of the struct `std.fs.Dir` here
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// https://ziglang.org/documentation/master/std/#std.fs.Dir
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// - can you find a function for opening a file? how about deleting a file?
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// - what kind of options can you use with those functions?
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|
|
|
|||
|
|
@ -1,23 +1,55 @@
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--- exercises/107_files2.zig 2024-05-05 00:48:25.808548611 +0200
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+++ answers/107_files2.zig 2024-05-05 01:14:03.866062288 +0200
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@@ -33,7 +33,7 @@
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// initalize an array of u8 with all letter 'A'.
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// we need to pick the size of the array, 64 seems like a good number.
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--- exercises/107_files2.zig 2024-06-17 10:11:53.651439869 +0200
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+++ answers/107_files2.zig 2024-06-17 10:21:50.700671057 +0200
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@@ -4,17 +4,17 @@
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// - create a file {project_root}/output/zigling.txt
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// with content `It's zigling time!`(18 byte total)
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//
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-// Now there's no point in writing to a file if we don't read from it, am I right?
|
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-// Let's write a program to read the content of the file that we just created.
|
||||
+// Now there no point in writing to a file if we don't read from it am I right?
|
||||
+// let's write a program to read the content of the file that we just created.
|
||||
//
|
||||
// I am assuming that you've created the appropriate files for this to work.
|
||||
//
|
||||
-// Alright, bud, lean in close. Here's the game plan.
|
||||
+// Alright, bud, lean in close here's the game plan.
|
||||
// - First, we open the {project_root}/output/ directory
|
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// - Secondly, we open file `zigling.txt` in that directory
|
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-// - Then, we initalize an array of characters with all letter 'A', and print it
|
||||
-// - After that, we read the content of the file into the array
|
||||
-// - Finally, we print out the content we just read
|
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+// - then, we initalize an array of characters with all letter 'A', and print it
|
||||
+// - After that, we read the content of the file to the array
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+// - Finally, we print out the read content
|
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|
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const std = @import("std");
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@@ -30,23 +30,23 @@
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const file = try output_dir.openFile("zigling.txt", .{});
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defer file.close();
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- // initalize an array of u8 with all letter 'A'
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- // we need to pick the size of the array, 64 seems like a good number
|
||||
+ // initalize an array of u8 with all letter 'A'.
|
||||
+ // we need to pick the size of the array, 64 seems like a good number.
|
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// fix the initalization below
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- var content = ['A']*64;
|
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+ var content = [_]u8{'A'} ** 64;
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// this should print out : `AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA`
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std.debug.print("{s}\n", .{content});
|
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|
||||
@@ -41,12 +41,12 @@
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// can you go here to find a way to read the content ?
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// okay, seems like a threat of violence is not the answer in this case
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- // can you go here to find a way to read the content?
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+ // can you go here to find a way to read the content ?
|
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// https://ziglang.org/documentation/master/std/#std.fs.File
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// hint: you might find two answers that are both vaild in this case
|
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- const bytes_read = zig_read_the_file_or_i_will_fight_you(&content);
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+ const bytes_read = try file.read(&content);
|
||||
|
||||
// Woah, too screamy, I know you're excited for zigling time but tone it down a bit
|
||||
// Can you print only what we read from the file ?
|
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- // Woah, too screamy. I know you're excited for zigling time but tone it down a bit.
|
||||
- // Can you print only what we read from the file?
|
||||
+ // Woah, too screamy, I know you're excited for zigling time but tone it down a bit
|
||||
+ // Can you print only what we read from the file ?
|
||||
std.debug.print("Successfully Read {d} bytes: {s}\n", .{
|
||||
bytes_read,
|
||||
- content, // change this line only
|
||||
|
|
|
|||
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