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reached errors
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@ -5,14 +5,13 @@
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// construct to `Option` that can be used to express error conditions. Let's use it!
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// construct to `Option` that can be used to express error conditions. Let's use it!
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// Execute `rustlings hint errors1` or use the `hint` watch subcommand for a hint.
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// Execute `rustlings hint errors1` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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pub fn generate_nametag_text(name: String) -> Option<String> {
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pub fn generate_nametag_text(name: String) -> Result<String,String> {
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if name.is_empty() {
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if name.is_empty() {
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// Empty names aren't allowed.
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// Empty names aren't allowed.
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None
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Err(String::from("`name` was empty; it must be nonempty."))
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} else {
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} else {
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Some(format!("Hi! My name is {}", name))
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Ok(format!("Hi! My name is {}", name))
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}
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}
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}
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}
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@ -1,7 +1,7 @@
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// options2.rs
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// options2.rs
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// Execute `rustlings hint options2` or use the `hint` watch subcommand for a hint.
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// Execute `rustlings hint options2` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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//come back to this cause this shit made no sense to me
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#[cfg(test)]
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#[cfg(test)]
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mod tests {
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mod tests {
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@ -11,7 +11,7 @@ mod tests {
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let optional_target = Some(target);
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let optional_target = Some(target);
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// TODO: Make this an if let statement whose value is "Some" type
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// TODO: Make this an if let statement whose value is "Some" type
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if let Some(word) = target {
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if let Some(word) = optional_target {
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assert_eq!(word, target);
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assert_eq!(word, target);
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}
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}
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}
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}
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@ -26,8 +26,8 @@ mod tests {
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// TODO: make this a while let statement - remember that vector.pop also adds another layer of Option<T>
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// TODO: make this a while let statement - remember that vector.pop also adds another layer of Option<T>
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// You can stack `Option<T>`'s into while let and if let
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// You can stack `Option<T>`'s into while let and if let
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integer = optional_integers.pop() {
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while let Some(integer) = optional_integers.pop() {
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assert_eq!(integer, range);
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assert_eq!(integer, Some(range));
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range -= 1;
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range -= 1;
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}
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}
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}
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}
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@ -1,8 +1,7 @@
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// options3.rs
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// options3.rs
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// Execute `rustlings hint options3` or use the `hint` watch subcommand for a hint.
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// Execute `rustlings hint options3` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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//ref is used to borrow the value without having to match a comletely different type of &Foo
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struct Point {
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struct Point {
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x: i32,
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x: i32,
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y: i32,
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y: i32,
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@ -12,8 +11,9 @@ fn main() {
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let y: Option<Point> = Some(Point { x: 100, y: 200 });
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let y: Option<Point> = Some(Point { x: 100, y: 200 });
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match y {
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match y {
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Some(p) => println!("Co-ordinates are {},{} ", p.x, p.y),
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Some(ref p) => println!("Co-ordinates are {},{} ", p.x, p.y),
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_ => println!("no match"),
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_ => println!("no match"),
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}
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}
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y; // Fix without deleting this line.
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y; // Fix without deleting this line.
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}
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}
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