From 86b5c08b9bea1576127a7c5f599f5752072c087d Mon Sep 17 00:00:00 2001
From: Sanjay K <sanjaykdragon@users.noreply.github.com>
Date: Tue, 7 Apr 2020 14:16:10 -0400
Subject: [PATCH] feat: Add Option2 exercise (#290)
* added option2
* changed up the exercise, modified the help section
* Update exercises/option/option2.rs
Co-Authored-By: fmoko <mokou@posteo.net>
* Update exercises/option/option2.rs
Co-Authored-By: fmoko <mokou@posteo.net>
* Update exercises/option/option2.rs
Co-Authored-By: fmoko <mokou@posteo.net>
Co-authored-by: fmoko <mokou@posteo.net>
---
exercises/option/option2.rs | 25 +++++++++++++++++++++++++
info.toml | 15 +++++++++++++++
2 files changed, 40 insertions(+)
create mode 100644 exercises/option/option2.rs
diff --git a/exercises/option/option2.rs b/exercises/option/option2.rs
new file mode 100644
index 00000000..a55f734e
--- /dev/null
+++ b/exercises/option/option2.rs
@@ -0,0 +1,25 @@
+// option2.rs
+// Make me compile! Execute `rustlings hint option2` for hints
+
+// I AM NOT DONE
+
+fn main() {
+ let optional_value = Some(String::from("rustlings"));
+ // Make this an if let statement whose value is "Some" type
+ value = optional_value {
+ println!("the value of optional value is: {}", value);
+ } else {
+ println!("The optional value doesn't contain anything!");
+ }
+
+ let mut optional_values_vec: Vec<Option<i8>> = Vec::new();
+ for x in 1..10 {
+ optional_values_vec.push(Some(x));
+ }
+
+ // make this a while let statement - remember that vector.pop also adds another layer of Option<T>
+ // You can stack `Option<T>`'s into while let and if let
+ value = optional_values_vec.pop() {
+ println!("current value: {}", value);
+ }
+}
diff --git a/info.toml b/info.toml
index ec8da2c8..04a90cf0 100644
--- a/info.toml
+++ b/info.toml
@@ -534,6 +534,21 @@ and:
pattern matching
"""
+[[exercises]]
+name = "option2"
+path = "exercises/option/option2.rs"
+mode = "compile"
+hint = """
+check out:
+https://doc.rust-lang.org/rust-by-example/flow_control/if_let.html
+https://doc.rust-lang.org/rust-by-example/flow_control/while_let.html
+
+Remember that Options can be stacked in if let and while let.
+For example: Some(Some(variable)) = variable2
+
+
+"""
+
[[exercises]]
name = "result1"
path = "exercises/error_handling/result1.rs"