reduce functions code example
Example 1: reduce javascript
const sum = array.reduce((accumulator, element) => {
return accumulator + element;
}, 0);
const product = array.reduce((accumulator, element) => {
return accumulator * element;
}, 1);
Example 2: reduce()
const array1 = [1, 2, 3, 4];
const reducer = (accumulator, currentValue) => accumulator + currentValue;
console.log(array1.reduce(reducer));
console.log(array1.reduce(reducer, 5));
Example 3: reduce javascript
const initialValue = 0;
const numbers = [5, 10, 15];
const reducer = (accumulator, item) => {
return accumulator + item;
};
const total = numbers.reduce(reducer, initialValue)
Example 4: reduce function javascript
array.reduce(function(acumulador, elementoAtual, indexAtual, arrayOriginal), valorInicial)
Example 5: reduce method
The reduce() method executes a reducer function (that you provide) on each element of the array, resulting in single output value.
The reducer function takes four arguments:
Accumulator (acc)
Current Value (cur)
Current Index (idx)
Source Array (src)
arr.reduce(callback( accumulator, currentValue, [, index[, array]] )[, initialValue])
let flattened = [[0, 1], [2, 3], [4, 5]].reduce(
( accumulator, currentValue ) => accumulator.concat(currentValue),
[]
)