feat: move vec exercises into their own folder
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# Collections
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# Hashmaps
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A *hash map* allows you to associate a value with a particular key.
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You may also know this by the names [*unordered map* in C++](https://en.cppreference.com/w/cpp/container/unordered_map),
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[*dictionary* in Python](https://docs.python.org/3/tutorial/datastructures.html#dictionaries) or an *associative array* in other languages.
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Rust’s standard library includes a number of very useful data
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structures called collections. Most other data types represent one
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specific value, but collections can contain multiple values. Unlike
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the built-in array and tuple types, the data these collections point
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to is stored on the heap, which means the amount of data does not need
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to be known at compile time and can grow or shrink as the program
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runs.
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This exercise will get you familiar with two fundamental data
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structures that are used very often in Rust programs:
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* A *vector* allows you to store a variable number of values next to
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each other.
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* A *hash map* allows you to associate a value with a particular key.
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You may also know this by the names [*unordered map* in C++](https://en.cppreference.com/w/cpp/container/unordered_map),
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[*dictionary* in Python](https://docs.python.org/3/tutorial/datastructures.html#dictionaries) or an *associative array* in other languages.
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This is the other data structure that we've been talking about before, when
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talking about Vecs.
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## Further information
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- [Storing Lists of Values with Vectors](https://doc.rust-lang.org/stable/book/ch08-01-vectors.html)
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- [Storing Keys with Associated Values in Hash Maps](https://doc.rust-lang.org/book/ch08-03-hash-maps.html)
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exercises/vecs/README.md
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exercises/vecs/README.md
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# Vectors
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Vectors are one of the most-used Rust data structures. In other programming
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languages, they'd simply be called Arrays, but since Rust operates on a
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bit of a lower level, an array in Rust is stored on the stack (meaning it
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can't grow or shrink, and the size needs to be known at compile time),
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and a Vector is stored in the heap (where these restrictions do not apply).
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Vectors are a bit of a later chapter in the book, but we think that they're
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useful enough to talk about them a bit earlier. We shall be talking about
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the other useful data structure, hash maps, later.
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## Further information
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- [Storing Lists of Values with Vectors](https://doc.rust-lang.org/stable/book/ch08-01-vectors.html)
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// vec1.rs
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// vecs1.rs
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// Your task is to create a `Vec` which holds the exact same elements
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// as in the array `a`.
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// Make me compile and pass the test!
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// Execute `rustlings hint vec1` or use the `hint` watch subcommand for a hint.
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// Execute `rustlings hint vecs1` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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// vec2.rs
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// vecs2.rs
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// A Vec of even numbers is given. Your task is to complete the loop
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// so that each number in the Vec is multiplied by 2.
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//
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// Make me pass the test!
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//
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// Execute `rustlings hint vec2` or use the `hint` watch subcommand for a hint.
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// Execute `rustlings hint vecs2` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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@ -242,8 +242,8 @@ Now you have another tool in your toolbox!"""
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# VECS
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[[exercises]]
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name = "vec1"
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path = "exercises/collections/vec1.rs"
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name = "vecs1"
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path = "exercises/vecs/vecs1.rs"
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mode = "test"
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hint = """
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In Rust, there are two ways to define a Vector.
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@ -256,8 +256,8 @@ of the Rust book to learn more.
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"""
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[[exercises]]
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name = "vec2"
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path = "exercises/collections/vec2.rs"
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name = "vecs2"
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path = "exercises/vecs/vecs2.rs"
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mode = "test"
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hint = """
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Hint 1: `i` is each element from the Vec as they are being iterated. Can you try
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