sema-docs 1.20.0

Canonical structured documentation for Sema builtins/special forms; powers LSP hover/completion and REPL apropos
Documentation 
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---
name: "map/update"
module: "maps"
section: "Higher-Order Map Operations"
---

Update a value at a key by applying a function.

```sema
(map/update {:a 1} :a (fn (v) (+ v 10)))   ; => {:a 11}
```