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Merge pull request 'English fixes for 107_files2.zig' (#108) from hippietrail/exercises:english-107 into main
Reviewed-on: https://codeberg.org/ziglings/exercises/pulls/108
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commit
6d3d3651d0
2 changed files with 31 additions and 31 deletions
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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 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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@ -30,21 +30,21 @@ 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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std.debug.print("{s}\n", .{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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// 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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// 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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content, // change this line only
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