reducer function javascript 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 mdn
arr.reduce(callback( accumulator, currentValue[, index[, array]] )[, initialValue])
Example 4: reduce javascript
const sum = array.reduce((accumulator, element[, idx[, sourceArray]]) => {
return accumulator + idx * 2 + element
}, 0);
Example 5: javascript, reduce
const myReduce = myArray.reduce((acc, item) => {
acc += item
})
Example 6: javascript reduce sur un tableau d'objet
[0, 1, 2, 3, 4].reduce(function(accumulateur, valeurCourante, index, array){
return accumulateur + valeurCourante;
});