JS Сумма массива
[1, 2, 3, 4].reduce((a, b) => a + b, 0)
// Output: 10
stdafx-h
[1, 2, 3, 4].reduce((a, b) => a + b, 0)
// Output: 10let flattened = [[0, 1], [2, 3], [4, 5]].reduce(
function(accumulator, currentValue) {
return accumulator.concat(currentValue)
},
[]
)
// flattened is [0, 1, 2, 3, 4, 5]
const sum = arr => arr.reduce((a, b) => a + b, 0);var authors = [{name: 'some author'},{name: 'another author'},{name: 'last author'}]
var authorString = authors.map(function(author){
return author.name;
}).join(",");
console.log(authorString);
let array = [36, 25, 6, 15];
array.reduce((acc, curr) => acc + curr, 0)
// 36 + 25 + 6 + 15 = 82// Reduce in javascript advance
// output: { '22': 2, '24': 2, '26': 1 }
const user = [
{name:"Abhishek",age:24},
{name:"Dhruval",age:22},
{name:"Anish",age:26},
{name:"Aakash",age:22},
{name:"Darshil",age:24},
]
const newUser = user.reduce((acc,cur)=>{
if(acc[cur.age]){
acc[cur.age] = acc[cur.age] +1
}
else{
acc[cur.age] = 1
}
return acc;
},{})
console.log(newUser)