Madhurig at 16:22, 23 November 2025

2025-11-23T16:22:15Z

Madhurig at 08:54, 13 November 2025

2025-11-13T08:54:15Z

Nirmala Venkat: Created page with "{| border="1" |- || '''Visual Cue''' || '''Narration''' |- || '''Slide 1''' '''Title Slide''' || Welcome to the Spoken Tutorial on '''Path Struct in Rust.''' |- style="border..."

2025-10-29T07:27:15Z

Created page with "{| border="1" |- || '''Visual Cue''' || '''Narration''' |- || '''Slide 1''' '''Title Slide''' || Welcome to the Spoken Tutorial on '''Path Struct in Rust.''' |- style="border..."

New page

{| border="1"
|-
|| '''Visual Cue'''
|| '''Narration'''
|-
|| '''Slide 1'''

'''Title Slide'''
|| Welcome to the Spoken Tutorial on '''Path Struct in Rust.'''
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| '''Slide 2'''

'''Learning Objectives'''
|| In this tutorial, we will learn about,
* <div style="margin-left:1.27cm;margin-right:0cm;">Path Struct and</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">Common methods of Path struct</div>

|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.101cm;padding-right:0.191cm;"
|| '''Slide 3'''

'''System Requirements'''
|| To record this tutorial I’m using the following setup.

|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.101cm;padding-right:0.191cm;"
|| '''Slide''' '''4'''

'''Code Files'''
||
* The following code file is required to practise this tutorial.
* This file is provided in the Code Files link of this tutorial page.

|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.101cm;padding-right:0.191cm;"
|| '''Slide 5'''

'''Path Struct'''
||
* <div style="margin-left:1.27cm;margin-right:0cm;">'''Path''' is a struct in Rust’s standard library <span style="color:#000000;">(std::path::Path)</span><span style="color:#000000;">.</span></div>
* <div style="margin-left:1.27cm;margin-right:0cm;">It is used to represent file system’s path.</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">A '''Path''' does not actually open or read files. </div>

|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Open '''Visual''' '''code editor'''
|| Let us open the '''Visual Studio code editor'''.

|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| In the menu bar, click on '''Terminal''' and select''' New Terminal'''.

'''> cd''' '''Desktop'''/'''MyRustProject'''

'''>''' '''cargo new pathstruct'''
|| <div style="color:#000000;">I have created the '''pathstruct''' project as explained earlier.</div>

<div style="color:#000000;">We will see how Rust interacts with files and folders using the '''Path struct'''.</div>

|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Point to the''' main.rs '''file.
| style="color:#000000;" | <span style="background-color:#ffffff;">In the </span><span style="background-color:#ffffff;">'''main.rs '''</span><span style="background-color:#ffffff;">file, copy and paste the code from the Code file.</span>
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| use std::path::Path;

fn main() {

let path = Path::new("hello.txt");

println!("Exists: {}", path.exists());

println!("Is file: {}", path.is_file());

println!("Is directory: {}", path.is_dir());

}
|| This code checks if a file exists and also whether it’s a file or directory.

We import the '''Path struct''' from the std'''::path''' module.

'''Path''' is used to inspect and manipulate file or directory paths in a safe way.

It''' '''creates a Path instance pointing to "'''hello'''.'''txt'''".

At this stage, no file is created or opened.

'''path.exists() '''method checks if '''hello.txt '''actually exists in the file system or not.

'''path.is_file() '''<span style="color:#000000;">method</span><span style="color:#000000;">''' '''</span>checks if the path points to a file.

'''path.is_dir() '''method checks if the path points to a '''directory'''.

Save the program.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Type cargo run to run the program
|| Run the program.

Here the '''hello.txt '''file''' '''does not exist and so it returns false.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Create hello.txt in the path struct folder.

Type cargo run at the terminal prompt.
|| Let us create the file '''hello.txt''' in the working folder.

Run the same code and check the output.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
||
|| Next we will see more methods that are used with '''Path struct.'''
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Select all >> press Delete key
|| Clear the window and copy and paste the code from the code file.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| use std::path::Path;

fn main() {

let path = Path::new("/home/nirmala/docs/file.txt");

println!("Full path: {:?}", path);

// Get the file name (last component)

if let Some(filename) = path.file_name() {

println!("File name: {}", filename.to_string_lossy());

}

// Get the parent directory

if let Some(parent) = path.parent() {

println!("Parent directory: {:?}", parent);

}

// Get the extension

if let Some(ext) = path.extension() {

println!("Extension: {}", ext.to_string_lossy());

}

}
||
<span style="color:#000000;">'''Path::new'''</span><span style="color:#000000;"> m</span>ethod creates a '''Path''' object pointing to the absolute path.

'''path.file_name() '''method''' '''gets the last component of the path.

Here it is the filename '''file.txt'''

'''to_string_lossy()''' function converts it into a human-readable String.

'''path.parent()''' gets the '''parent directory''' of the path.

'''path.extension()''' gets the '''file extension. '''

Here the extension is '''.txt'''

Save the program.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| In the terminal, type '''cargo run '''
|| In the terminal, type '''cargo run '''to see the output.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
||
|| Next we will know how to get the input from the user.

These operations deal with reading from the '''keyboard''' and writing to the '''terminal.'''
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
||
|| Clear the code window and replace the code from the code file as shown.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| use std::io;

fn main() {

let mut input = String::new();

println!("Enter your name:");

io::stdin().read_line(&mut input).expect("Failed to read line");

println!("Hello, {}", input.trim());

}
|| We use''' std::io() '''to bring the core utility functions '''stdin() '''and''' stdout().'''

'''String::new()''' method creates a mutable empty string to store user input.

Next it prompts the user to type his/her name.

'''read_line '''waits for the user to type and press '''Enter'''.

'''.expect()''' is used here for simple error handling.

'''.trim() '''method removes the unwanted characters from the end of input and format it.

At last we print '''Hello''' and the input that user enters on the console.

<div style="color:#000000;">Save the program.</div>

|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| In the terminal, type '''cargo run '''

Enter the name

Type name >> Press Enter.
|| In the terminal, type '''cargo run.'''

It prompts to enter the name.

Type your name and press Enter.

It prints Hello and the entered name as output.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
||
|| Next we will see how to handle errors in file operations
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| use std::fs::File;

fn main() {

match File::open("non_existent.txt") {

Ok(_) => println!("File opened successfully."),

Err(e) => println!("Error opening file: {}", e),

}

}
|| Copy and paste the code from the code file.

'''File::open '''method returns a '''Result enum''' type.

If the file exists and opens successfully it returns the '''OK '''type.

If the file doesn’t exist (or another error happens), '''e''' holds the error details.

Save the program.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Type cargo run

Point to the error message.

|| Run the program and check the output.

We can see an error message '''“Error opening file: No such file or directory”.'''

|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| '''Slide 6'''

'''Summary'''
|| This brings us to the end of this tutorial.

Let us summarize.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| '''Slide 7'''

'''Assignment'''
|| As an Assignment

Write a Rust program that:

1. Asks the user to enter a file path

2.Prints the following information using methods from std::path::Path module.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| '''Slide 8'''

'''Thank You'''
|| Thanks for joining.
|-
|}
<div style="margin-left:-1.588cm;margin-right:-1.429cm;"></div>

@@ Line 40: / Line 40: @@
 |-
-|| Open '''Visual''' '''code editor'''
+|| Open '''Visual code editor'''
 || Let us open the '''Visual Studio code editor'''.
@@ Line 76: / Line 76: @@
 '''Path''' is used to inspect and manipulate file or directory paths in a safe way.
-It''' '''creates a Path instance pointing to "'''hello'''.'''txt'''".
+It creates a Path instance pointing to "'''hello.txt'''".
 At this stage, no file is created or opened.
-'''path.exists() '''method checks if '''hello.txt '''actually exists in the file system or not.
+'''path.exists() '''method checks if '''hello.txt ''' actually exists in the file system or not.
-'''path.is_file() '''method''' '''checks if the path points to a file.
+'''path.is_file() '''method checks if the path points to a file.
 '''path.is_dir() '''method checks if the path points to a '''directory'''.
@@ Line 91: / Line 91: @@
 || Run the program.
-Here the '''hello.txt '''file''' '''does not exist and so it returns false.
+Here the '''hello.txt '''file does not exist and so it returns false.
 |-
 || Create hello.txt in the path struct folder.
@@ Line 139: / Line 139: @@
+}
-||
+|| '''Path::new''' method creates a '''Path''' object pointing to the absolute path.
 '''Path::new''' method creates a '''Path''' object pointing to the absolute path.
-'''path.file_name() '''method''' '''gets the last component of the path.
+'''path.file_name() '''method gets the last component of the path.
 Here it is the filename '''file.txt'''
@@ Line 156: / Line 155: @@
 Save the program.
 |-
-|| In the terminal, type '''cargo run '''
+|| In the terminal, type '''cargo run '''.
 || In the terminal, type '''cargo run '''to see the output.
 |-
@@ Line 180: / Line 179: @@
+}
-|| We use''' std::io() '''to bring the core utility functions '''stdin() '''and''' stdout().'''
+|| We use ''' std::io() '''to bring the core utility functions '''stdin() '''and''' stdout().'''
 '''String::new()''' method creates a mutable empty string to store user input.
@@ Line 190: / Line 189: @@
 '''.expect()''' is used here for simple error handling.
-'''.trim() '''method removes the unwanted characters from the end of input and format it.
+'''.trim() ''' method removes the unwanted characters from the end of input and format it.
 At last we print '''Hello''' and the input that user enters on the console.
@@ Line 231: / Line 230: @@
 '''File::open '''method returns a '''Result enum''' type.
-If the file exists and opens successfully it returns the '''OK '''type.
+If the file exists and opens successfully it returns the '''OK ''' type.
 If the file doesn’t exist (or another error happens), '''e''' holds the error details.

Rust-Programming-Language/C2/Path-Struct/English - Revision history

Madhurig at 16:22, 23 November 2025

Madhurig at 08:54, 13 November 2025

Nirmala Venkat: Created page with "{| border="1" |- || '''Visual Cue''' || '''Narration''' |- || '''Slide 1''' '''Title Slide''' || Welcome to the Spoken Tutorial on '''Path Struct in Rust.''' |- style="border..."