mirror of
https://github.com/rust-lang/rustlings.git
synced 2024-12-26 00:00:03 +03:00
21 lines
903 B
Markdown
21 lines
903 B
Markdown
|
### Collections
|
||
|
|
|
||
|
|
Rust’s standard library includes a number of very useful data
|
||
|
|
structures called collections. Most other data types represent one
|
||
|
|
specific value, but collections can contain multiple values. Unlike
|
||
|
|
the built-in array and tuple types, the data these collections point
|
||
|
|
to is stored on the heap, which means the amount of data does not need
|
||
|
|
to be known at compile time and can grow or shrink as the program
|
||
|
|
runs.
|
||
|
|
|
||
|
|
This exercise will get you familiar with two fundamental data
|
||
|
|
structures that are used very often in Rust programs:
|
||
|
|
|
||
|
|
* A *vector* allows you to store a variable number of values next to
|
||
|
|
each other.
|
||
|
|
* A *hash map* allows you to associate a value with a particular key.
|
||
|
|
You may also know this by the names *map* in C++, *dictionary* in
|
||
|
|
Python or an *associative array* in other languages.
|
||
|
|
|
||
|
|
[Rust book chapter](https://doc.rust-lang.org/stable/book/ch08-01-vectors.html)
|