--- title: 418: Mental Models For Reduce Functions | daily.dev description: Joël and Stephanie discuss their mental models for reduce functions, including optimization techniques, the importance of understanding the combining... canonical: https://daily.dev/posts/418-mental-models-for-reduce-functions-cqorfc1mk twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: 418: Mental Models For Reduce Functions | daily.dev og:description: Joël and Stephanie discuss their mental models for reduce functions, including optimization techniques, the importance of understanding the combining... og:url: https://daily.dev/posts/418-mental-models-for-reduce-functions-cqorfc1mk og:image: https://api.daily.dev/og/posts/CqorFC1MK.png og:image:alt: 418: Mental Models For Reduce Functions 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. # 418: Mental Models For Reduce Functions **[RUBYLAND](https://daily.dev/sources/rubyla)** · 30 min read · 0 upvotes · 0 comments ## Summary Joël and Stephanie discuss their mental models for reduce functions, including optimization techniques, the importance of understanding the combining operation, and the use of custom objects as the accumulator. They also touch on the use of each and map instead of reduce, and the concept of monoids in reducing. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#functional-programming](https://daily.dev/tags/functional-programming), [#recursion](https://daily.dev/tags/recursion) [View this post on daily.dev](https://daily.dev/posts/418-mental-models-for-reduce-functions-cqorfc1mk) ```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":"418: Mental Models For Reduce Functions","url":"https://daily.dev/posts/418-mental-models-for-reduce-functions-cqorfc1mk","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/418-mental-models-for-reduce-functions-cqorfc1mk"},"datePublished":"2024-03-12T04:23:35.146Z","dateModified":"2024-05-09T09:28:18.744Z","description":"Joël and Stephanie discuss their mental models for reduce functions, including optimization techniques, the importance of understanding the combining...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/a1758c852da22d3143d147d40a1cfda7?_a=AQAEufR","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/a1758c852da22d3143d147d40a1cfda7?_a=AQAEufR","isAccessibleForFree":true,"articleSection":"RUBYLAND","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":"RUBYLAND","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/rubyla","url":"https://daily.dev/sources/rubyla"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/418-mental-models-for-reduce-functions-cqorfc1mk","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"functional-programming,recursion","timeRequired":"PT30M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"RUBYLAND","item":"https://daily.dev/sources/rubyla"},{"@type":"ListItem","position":3,"name":"418: Mental Models For Reduce Functions"}]} ```