--- title: How to decide between a Set and Array in Swift? – Donny Wals description: Learn about the key characteristics of Array and Set in Swift, including their differences, performance considerations, and use cases. canonical: https://daily.dev/posts/how-to-decide-between-a-set-and-array-in-swift-donny-wals-1ghmb2hub twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: How to decide between a Set and Array in Swift? – Donny Wals | daily.dev og:description: Learn about the key characteristics of Array and Set in Swift, including their differences, performance considerations, and use cases. og:url: https://daily.dev/posts/how-to-decide-between-a-set-and-array-in-swift-donny-wals-1ghmb2hub og:image: https://api.daily.dev/og/posts/1GHmB2hUb.png og:image:alt: How to decide between a Set and Array in Swift? – Donny Wals og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # How to decide between a Set and Array in Swift? – Donny Wals **[Donny Wals](https://daily.dev/sources/donnywals)** · 6 min read · 2 upvotes · 0 comments ## Summary Learn about the key characteristics of Array and Set in Swift, including their differences, performance considerations, and use cases. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#performance](https://daily.dev/tags/performance), [#swift](https://daily.dev/tags/swift), [#data-structures](https://daily.dev/tags/data-structures) [View this post on daily.dev](https://daily.dev/posts/how-to-decide-between-a-set-and-array-in-swift-donny-wals-1ghmb2hub) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"How to decide between a Set and Array in Swift? – Donny Wals","url":"https://daily.dev/posts/how-to-decide-between-a-set-and-array-in-swift-donny-wals-1ghmb2hub","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/how-to-decide-between-a-set-and-array-in-swift-donny-wals-1ghmb2hub"},"datePublished":"2024-05-15T07:06:35.180Z","dateModified":"2024-05-15T07:06:34.483Z","description":"Learn about the key characteristics of Array and Set in Swift, including their differences, performance considerations, and use cases.","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/1538423f5f28e0bbef73b9640ffeaefc?_a=AQAEuiZ","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/1538423f5f28e0bbef73b9640ffeaefc?_a=AQAEuiZ","isAccessibleForFree":true,"articleSection":"Donny Wals","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Donny Wals","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/d069732f62f0498387583206d3e04390","url":"https://daily.dev/sources/donnywals"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/how-to-decide-between-a-set-and-array-in-swift-donny-wals-1ghmb2hub","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":2},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"performance,swift,data-structures","timeRequired":"PT6M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Donny Wals","item":"https://daily.dev/sources/donnywals"},{"@type":"ListItem","position":3,"name":"How to decide between a Set and Array in Swift? – Donny Wals"}]} ```