100 lines
4.5 KiB
Diff
100 lines
4.5 KiB
Diff
--- exercises/106_files.zig 2024-06-17 10:11:53.651439869 +0200
|
|
+++ answers/106_files.zig 2024-06-17 10:21:50.697337653 +0200
|
|
@@ -1,22 +1,22 @@
|
|
//
|
|
// Until now, we've only been printing our output in the console,
|
|
-// which is good enough for fighting aliens and hermit bookkeeping.
|
|
+// which is good enough for fighting alien and hermit bookkeeping.
|
|
//
|
|
-// However, many other tasks require some interaction with the file system,
|
|
+// However, many other task require some interaction with the file system,
|
|
// which is the underlying structure for organizing files on your computer.
|
|
//
|
|
-// The file system provides a hierarchical structure for storing files
|
|
-// by organizing them into directories, which hold files and other directories,
|
|
-// thus creating a tree structure that can be navigated.
|
|
+// The File System provide a hierarchical structure for storing files
|
|
+// by organizing files into directories, which hold files and other directories,
|
|
+// thus creating a tree structure for navigating.
|
|
//
|
|
-// Fortunately, the Zig standard library provides a simple API for interacting
|
|
-// with the file system, see the detail documentation here:
|
|
+// Fortunately, zig standard library provide a simple api for interacting
|
|
+// with the file system, see the detail documentation here
|
|
//
|
|
// https://ziglang.org/documentation/master/std/#std.fs
|
|
//
|
|
-// In this exercise, we'll try to:
|
|
-// - create a new directory,
|
|
-// - open a file in the directory,
|
|
+// In this exercise, we'll try to
|
|
+// - create a new directory
|
|
+// - open a file in the directory
|
|
// - write to the file.
|
|
//
|
|
// import std as always
|
|
@@ -27,42 +27,42 @@
|
|
const cwd: std.fs.Dir = std.fs.cwd();
|
|
|
|
// then we'll try to make a new directory /output/
|
|
- // to store our output files.
|
|
+ // to put our output files.
|
|
cwd.makeDir("output") catch |e| switch (e) {
|
|
- // there is a chance you might want to run this
|
|
+ // there are chance you might want to run this
|
|
// program more than once and the path might already
|
|
- // have been created, so we'll have to handle this error
|
|
+ // been created, so we'll have to handle this error
|
|
// by doing nothing
|
|
//
|
|
// we want to catch error.PathAlreadyExists and do nothing
|
|
- ??? => {},
|
|
- // if there's any other unexpected error we just propagate it through
|
|
+ error.PathAlreadyExists => {},
|
|
+ // if is any other unexpected error we just propagate it through
|
|
else => return e,
|
|
};
|
|
|
|
// then we'll try to open our freshly created directory
|
|
- // wait a minute...
|
|
+ // wait a minute
|
|
// opening a directory might fail!
|
|
// what should we do here?
|
|
- var output_dir: std.fs.Dir = cwd.openDir("output", .{});
|
|
+ var output_dir: std.fs.Dir = try cwd.openDir("output", .{});
|
|
defer output_dir.close();
|
|
|
|
// we try to open the file `zigling.txt`,
|
|
- // and propagate any error up
|
|
+ // and propagate the error up if there are any errors
|
|
const file: std.fs.File = try output_dir.createFile("zigling.txt", .{});
|
|
// it is a good habit to close a file after you are done with it
|
|
// so that other programs can read it and prevent data corruption
|
|
// but here we are not yet done writing to the file
|
|
- // if only there were a keyword in Zig that
|
|
- // allowed you to "defer" code execution to the end of the scope...
|
|
- file.close();
|
|
+ // if only there were a keyword in zig that
|
|
+ // allows you "defer" code execute to the end of scope...
|
|
+ defer file.close();
|
|
|
|
- // you are not allowed to move these two lines above the file closing line!
|
|
+ // !you are not allowed to switch these two lines above the file closing line!
|
|
const byte_written = try file.write("It's zigling time!");
|
|
std.debug.print("Successfully wrote {d} bytes.\n", .{byte_written});
|
|
}
|
|
// to check if you actually write to the file, you can either,
|
|
-// 1. open the file in your text editor, or
|
|
+// 1. open the file on your text editor, or
|
|
// 2. print the content of the file in the console with the following command
|
|
// >> cat ./output/zigling.txt
|
|
//
|
|
@@ -86,7 +86,7 @@
|
|
//
|
|
// Question:
|
|
// - what should you do if you want to also read the file after opening it?
|
|
-// - go to the documentation of the struct `std.fs.Dir` here:
|
|
+// - go to documentation of the struct `std.fs.Dir` here
|
|
// https://ziglang.org/documentation/master/std/#std.fs.Dir
|
|
// - can you find a function for opening a file? how about deleting a file?
|
|
// - what kind of options can you use with those functions?
|