--- title: Attribute equality | daily.dev description: A deep dive into how Go's `slog.Attr.Equal` method determines equality between log attributes. By examining the source code, it reveals that equality is... canonical: https://daily.dev/posts/attribute-equality-0uwrp5fv1 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Attribute equality | daily.dev og:description: A deep dive into how Go's `slog.Attr.Equal` method determines equality between log attributes. By examining the source code, it reveals that equality is... og:url: https://daily.dev/posts/attribute-equality-0uwrp5fv1 og:image: https://api.daily.dev/og/posts/0uwRP5fV1.png og:image:alt: Attribute equality 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. # Attribute equality **[Boldly Go](https://daily.dev/sources/boldlygo)** · 2 min read · 13 upvotes · 1 comments ## Summary A deep dive into how Go's `slog.Attr.Equal` method determines equality between log attributes. By examining the source code, it reveals that equality is type-wise first, then value-based. Key behaviors include: custom types (e.g., `myBool`) are not equal to their underlying types, integers across different Go integer types compare as equal, and passing non-comparable values like slices will cause a runtime panic — making it risky to test equality on unknown slog attributes. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Community discussion Top comments from developers on daily.dev. **@georgeongoro** · 1 upvotes > I am enlightened, thank you ## Similar posts on daily.dev - [The Attr type](https://daily.dev/posts/the-attr-type-udhsolgm5) · Boldly Go · 19 upvotes · 0 comments --- Tags: [#golang](https://daily.dev/tags/golang), [#logging](https://daily.dev/tags/logging) [View this post on daily.dev](https://daily.dev/posts/attribute-equality-0uwrp5fv1) ```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":"Attribute equality","url":"https://daily.dev/posts/attribute-equality-0uwrp5fv1","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/attribute-equality-0uwrp5fv1"},"datePublished":"2026-07-24T14:17:58.358Z","dateModified":"2026-07-24T16:19:05.320Z","description":"A deep dive into how Go's `slog.Attr.Equal` method determines equality between log attributes. 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