In Rust, a slice is a reference to a contiguous section of a larger data structure, such as an array or a vector.<\/p>\n
It is represented using the syntax A slice does not own the data it refers to<\/strong>, it just provides a way to access the data in the original data structure.<\/p>\n An array, on the other hand, is a fixed-size data structure that owns a contiguous block of memory<\/strong>.<\/p>\n It is represented using the syntax An array is stored on the stack<\/strong>, so it has a fixed size that must be known at compile time.<\/p>\n One key difference between slices and arrays is that slices are dynamically sized, while arrays have a fixed size<\/strong>.<\/p>\n This means that you can create a slice that refers to a portion of an array, but you cannot create an array that refers to a portion of another array.<\/p>\n Here is an example that demonstrates the difference between slices and arrays:<\/p>\n Another difference between slices and arrays is that slices are more flexible and can be used with a wider range of functions and data structures. For example, you can pass a slice as an argument to a function, whereas you would have to pass an array by reference.<\/p>\n Slices are also more efficient to work with in certain cases, because they do not require the overhead of allocating and deallocating memory.<\/p>\n In general, slices are the more commonly used data type in Rust because they are more flexible and easier to work with than arrays. However, there are cases where using an array may be more appropriate, such as when you need to allocate a fixed-size data structure on the stack for performance reasons.<\/p>\n","protected":false},"excerpt":{"rendered":" In Rust, a slice is a reference to a contiguous section of a larger data structure, such as an array or a vector. It is represented using the syntax &[T], where T is the type of the elements in the slice. A slice does not own the data it refers to, it just provides a […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[15],"tags":[1659],"class_list":["post-3996","post","type-post","status-publish","format-standard","hentry","category-code","tag-rust"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p5Unzf-12s","jetpack-related-posts":[{"id":4000,"url":"https:\/\/www.gubatron.com\/blog\/what-is-the-rust-equivalent-to-javas-printwriter\/","url_meta":{"origin":3996,"position":0},"title":"What is the Rust equivalent to Java’s PrintWriter?","author":"gubatron","date":"December 21, 2022","format":false,"excerpt":"In Rust, the equivalent of Java's PrintWriter is the std::io::Write trait, which is implemented by a number of types that can be used to write data to an output stream, such as a file or a network socket. To use Write to write text to an output stream, you can\u2026","rel":"","context":"In "Code"","block_context":{"text":"Code","link":"https:\/\/www.gubatron.com\/blog\/category\/code\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.gubatron.com\/blog\/wp-content\/uploads\/2022\/12\/progress_image_100_7fdc7b72-6c19-42f5-affe-d055d02d6f8e.webp?fit=1024%2C1024&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.gubatron.com\/blog\/wp-content\/uploads\/2022\/12\/progress_image_100_7fdc7b72-6c19-42f5-affe-d055d02d6f8e.webp?fit=1024%2C1024&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.gubatron.com\/blog\/wp-content\/uploads\/2022\/12\/progress_image_100_7fdc7b72-6c19-42f5-affe-d055d02d6f8e.webp?fit=1024%2C1024&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.gubatron.com\/blog\/wp-content\/uploads\/2022\/12\/progress_image_100_7fdc7b72-6c19-42f5-affe-d055d02d6f8e.webp?fit=1024%2C1024&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":2047,"url":"https:\/\/www.gubatron.com\/blog\/map-function-in-java\/","url_meta":{"origin":3996,"position":1},"title":"Map function in Java","author":"gubatron","date":"August 31, 2010","format":false,"excerpt":"I read on some email signature something along the lines of: \"If I had a dollar for every for(int i=0; i < size; i++) { ... } I've written I'd be rich\" After coding on Android and learning about some of the tips for performance, like \"With an ArrayList, a\u2026","rel":"","context":"In "Code"","block_context":{"text":"Code","link":"https:\/\/www.gubatron.com\/blog\/category\/code\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":3213,"url":"https:\/\/www.gubatron.com\/blog\/aws-troubleshooting-how-to-fix-a-broken-ebs-volume-bad-superblock-on-xfs\/","url_meta":{"origin":3996,"position":2},"title":"AWS troubleshooting: how to fix a broken EBS volume (bad superblock on xfs)","author":"gubatron","date":"January 19, 2014","format":false,"excerpt":"As great as EBS volumes are on Amazon Web Services, they can break and not ever mount again, even though your data could still be there intact, a simple corruption on the filesystem structure can cause a lot of damage. On this post I teach you how to move all\u2026","rel":"","context":"In "Geeklife"","block_context":{"text":"Geeklife","link":"https:\/\/www.gubatron.com\/blog\/category\/geeklife\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.gubatron.com\/blog\/wp-content\/uploads\/2014\/01\/car-longshot2.jpg?fit=720%2C482&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.gubatron.com\/blog\/wp-content\/uploads\/2014\/01\/car-longshot2.jpg?fit=720%2C482&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.gubatron.com\/blog\/wp-content\/uploads\/2014\/01\/car-longshot2.jpg?fit=720%2C482&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.gubatron.com\/blog\/wp-content\/uploads\/2014\/01\/car-longshot2.jpg?fit=720%2C482&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":1114,"url":"https:\/\/www.gubatron.com\/blog\/using-a-linear-array-as-a-bidimensional-matrix\/","url_meta":{"origin":3996,"position":3},"title":"Using a linear array as a bidimensional matrix","author":"gubatron","date":"January 27, 2009","format":false,"excerpt":"Often times I find the need to use a list or linear array as if it was a table. Everytime I need to do so, I always end up coding functions to convert a (x,y) coordinate to the real index n in the array. Let me illustrate, with an example.\u2026","rel":"","context":"In "Code"","block_context":{"text":"Code","link":"https:\/\/www.gubatron.com\/blog\/category\/code\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":4135,"url":"https:\/\/www.gubatron.com\/blog\/the-curious-case-of-inconsistent-cargo-fmt-formatting-and-how-to-fix-it\/","url_meta":{"origin":3996,"position":4},"title":"The Curious Case of Inconsistent cargo fmt Formatting (and How to Fix It)","author":"gubatron","date":"February 17, 2025","format":false,"excerpt":"Have you ever run into a situation where\u00a0cargo fmt, Rust's code formatter, produces different output on different machines, even though you're working on the same project? This can be incredibly frustrating, especially when you're trying to maintain consistent code style across a team or between your own development environments. I\u2026","rel":"","context":"In "Code"","block_context":{"text":"Code","link":"https:\/\/www.gubatron.com\/blog\/category\/code\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.gubatron.com\/blog\/wp-content\/uploads\/2025\/02\/gubatron_Abstract_digital_art_fragmented_code_snippets_floati_e3f2c486-78ad-4b2a-b86a-e792a1970064_2.png?fit=1024%2C1024&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.gubatron.com\/blog\/wp-content\/uploads\/2025\/02\/gubatron_Abstract_digital_art_fragmented_code_snippets_floati_e3f2c486-78ad-4b2a-b86a-e792a1970064_2.png?fit=1024%2C1024&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.gubatron.com\/blog\/wp-content\/uploads\/2025\/02\/gubatron_Abstract_digital_art_fragmented_code_snippets_floati_e3f2c486-78ad-4b2a-b86a-e792a1970064_2.png?fit=1024%2C1024&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.gubatron.com\/blog\/wp-content\/uploads\/2025\/02\/gubatron_Abstract_digital_art_fragmented_code_snippets_floati_e3f2c486-78ad-4b2a-b86a-e792a1970064_2.png?fit=1024%2C1024&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":2745,"url":"https:\/\/www.gubatron.com\/blog\/ubuntu-mongodb-wont-start-fixed\/","url_meta":{"origin":3996,"position":5},"title":"Ubuntu: mongodb won’t start [FIXED]","author":"gubatron","date":"May 23, 2012","format":false,"excerpt":"So you decided to change the default location of your mongodb data path on mongodb.conf but mongo won't start and you get an error similar to this [bash] Wed May 23 04:17:35 [initandlisten] MongoDB starting : pid=1214 port=27017 dbpath=\/media\/ebs\/data 64-bit host=domU-12-31-38-00-78-DB Wed May 23 04:17:35 [initandlisten] db version v2.0.4, pdfile\u2026","rel":"","context":"In \"mongo\"","block_context":{"text":"mongo","link":"https:\/\/www.gubatron.com\/blog\/tag\/mongo\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.gubatron.com\/blog\/wp-json\/wp\/v2\/posts\/3996","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gubatron.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gubatron.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gubatron.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gubatron.com\/blog\/wp-json\/wp\/v2\/comments?post=3996"}],"version-history":[{"count":3,"href":"https:\/\/www.gubatron.com\/blog\/wp-json\/wp\/v2\/posts\/3996\/revisions"}],"predecessor-version":[{"id":3999,"href":"https:\/\/www.gubatron.com\/blog\/wp-json\/wp\/v2\/posts\/3996\/revisions\/3999"}],"wp:attachment":[{"href":"https:\/\/www.gubatron.com\/blog\/wp-json\/wp\/v2\/media?parent=3996"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gubatron.com\/blog\/wp-json\/wp\/v2\/categories?post=3996"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gubatron.com\/blog\/wp-json\/wp\/v2\/tags?post=3996"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}&[T]<\/code>, where T is the type of the elements in the slice.<\/p>\n[T; N]<\/code>, where T<\/code> is the type of the elements in the array and N<\/code> is the size of the array.<\/p>\nlet arr = [1, 2, 3, 4, 5];\nlet slice = &arr[1..3]; \/\/ slice contains the elements [2, 3]\n<\/code><\/pre>\n