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Pulled ALL skills from 15 source repositories: - anthropics/skills: 16 (docs, design, MCP, testing) - obra/superpowers: 14 (TDD, debugging, agents, planning) - coreyhaines31/marketingskills: 25 (marketing, CRO, SEO, growth) - better-auth/skills: 5 (auth patterns) - vercel-labs/agent-skills: 5 (React, design, Vercel) - antfu/skills: 16 (Vue, Vite, Vitest, pnpm, Turborepo) - Plus 13 individual skills from various repos Mosaic Stack is not limited to coding — the Orchestrator and subagents serve coding, business, design, marketing, writing, logistics, analysis, and more. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
82 lines
1.9 KiB
Markdown
82 lines
1.9 KiB
Markdown
---
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category: Array
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---
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# useArrayReduce
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Reactive `Array.reduce`.
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## Usage
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```ts
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import { useArrayReduce } from '@vueuse/core'
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const sum = useArrayReduce([ref(1), ref(2), ref(3)], (sum, val) => sum + val)
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// sum.value: 6
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```
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### Use with reactive array
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```ts
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import { useArrayReduce } from '@vueuse/core'
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const list = reactive([1, 2])
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const sum = useArrayReduce(list, (sum, val) => sum + val)
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list.push(3)
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// sum.value: 6
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```
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### Use with initialValue
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```ts
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import { useArrayReduce } from '@vueuse/core'
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const list = reactive([{ num: 1 }, { num: 2 }])
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const sum = useArrayReduce(list, (sum, val) => sum + val.num, 0)
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// sum.value: 3
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```
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## Type Declarations
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```ts
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export type UseArrayReducer<PV, CV, R> = (
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previousValue: PV,
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currentValue: CV,
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currentIndex: number,
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) => R
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export type UseArrayReduceReturn<T = any> = ComputedRef<T>
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/**
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* Reactive `Array.reduce`
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*
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* @see https://vueuse.org/useArrayReduce
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* @param list - the array was called upon.
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* @param reducer - a "reducer" function.
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*
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* @returns the value that results from running the "reducer" callback function to completion over the entire array.
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*
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* @__NO_SIDE_EFFECTS__
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*/
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export declare function useArrayReduce<T>(
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list: MaybeRefOrGetter<MaybeRefOrGetter<T>[]>,
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reducer: UseArrayReducer<T, T, T>,
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): UseArrayReduceReturn<T>
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/**
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* Reactive `Array.reduce`
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*
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* @see https://vueuse.org/useArrayReduce
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* @param list - the array was called upon.
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* @param reducer - a "reducer" function.
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* @param initialValue - a value to be initialized the first time when the callback is called.
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*
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* @returns the value that results from running the "reducer" callback function to completion over the entire array.
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*
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* @__NO_SIDE_EFFECTS__
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*/
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export declare function useArrayReduce<T, U>(
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list: MaybeRefOrGetter<MaybeRefOrGetter<T>[]>,
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reducer: UseArrayReducer<U, T, U>,
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initialValue: MaybeRefOrGetter<U>,
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): UseArrayReduceReturn<U>
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```
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