VueUseuseArrayReduce
Reactive Array.reduce.
Usage
js
import { useArrayReduce } from '@vueuse/core'
const sum = useArrayReduce([ref(1), ref(2), ref(3)], (sum, val) => sum + val)
// sum.value: 6
import { useArrayReduce } from '@vueuse/core'
const sum = useArrayReduce([ref(1), ref(2), ref(3)], (sum, val) => sum + val)
// sum.value: 6
Use with reactive array
js
import { useArrayReduce } from '@vueuse/core'
const list = reactive([1, 2])
const sum = useArrayReduce(list, (sum, val) => sum + val)
list.push(3)
// sum.value: 6
import { useArrayReduce } from '@vueuse/core'
const list = reactive([1, 2])
const sum = useArrayReduce(list, (sum, val) => sum + val)
list.push(3)
// sum.value: 6
Use with initialValue
js
import { useArrayReduce } from '@vueuse/core'
const list = reactive([{ num: 1 }, { num: 2 }])
const sum = useArrayReduce(list, (sum, val) => sum + val.num, 0)
// sum.value: 3
import { useArrayReduce } from '@vueuse/core'
const list = reactive([{ num: 1 }, { num: 2 }])
const sum = useArrayReduce(list, (sum, val) => sum + val.num, 0)
// sum.value: 3
Type Declarations
Show Type Declarations
typescript
export type UseArrayReducer<PV, CV, R> = (
previousValue: PV,
currentValue: CV,
currentIndex: number
) => R
/**
* Reactive `Array.reduce`
*
* @see https://vueuse.org/useArrayReduce
* @param {Array} list - the array was called upon.
* @param reducer - a "reducer" function.
*
* @returns the value that results from running the "reducer" callback function to completion over the entire array.
*/
export declare function useArrayReduce<T>(
list: MaybeComputedRef<MaybeComputedRef<T>[]>,
reducer: UseArrayReducer<T, T, T>
): ComputedRef<T>
/**
* Reactive `Array.reduce`
*
* @see https://vueuse.org/useArrayReduce
* @param {Array} list - the array was called upon.
* @param reducer - a "reducer" function.
* @param initialValue - a value to be initialized the first time when the callback is called.
*
* @returns the value that results from running the "reducer" callback function to completion over the entire array.
*/
export declare function useArrayReduce<T, U>(
list: MaybeComputedRef<MaybeComputedRef<T>[]>,
reducer: UseArrayReducer<U, T, U>,
initialValue: MaybeComputedRef<U>
): ComputedRef<U>
export type UseArrayReducer<PV, CV, R> = (
previousValue: PV,
currentValue: CV,
currentIndex: number
) => R
/**
* Reactive `Array.reduce`
*
* @see https://vueuse.org/useArrayReduce
* @param {Array} list - the array was called upon.
* @param reducer - a "reducer" function.
*
* @returns the value that results from running the "reducer" callback function to completion over the entire array.
*/
export declare function useArrayReduce<T>(
list: MaybeComputedRef<MaybeComputedRef<T>[]>,
reducer: UseArrayReducer<T, T, T>
): ComputedRef<T>
/**
* Reactive `Array.reduce`
*
* @see https://vueuse.org/useArrayReduce
* @param {Array} list - the array was called upon.
* @param reducer - a "reducer" function.
* @param initialValue - a value to be initialized the first time when the callback is called.
*
* @returns the value that results from running the "reducer" callback function to completion over the entire array.
*/
export declare function useArrayReduce<T, U>(
list: MaybeComputedRef<MaybeComputedRef<T>[]>,
reducer: UseArrayReducer<U, T, U>,
initialValue: MaybeComputedRef<U>
): ComputedRef<U>
Source
Contributors
Anthony Fu
Levi (Nguyễn Lương Huy)
XLor