how can add if number is string in javascript in reduce function code example
Example 1: js reduce a array of straing
var authors = [{name: 'some author'},{name: 'another author'},{name: 'last author'}]
var authorString = authors.map(function(author){
return author.name;
}).join(",");
console.log(authorString);
Example 2: reduce method javascript
const array1 = [1, 2, 3, 4];
const callback = (accumulator, currentValue) => accumulator + currentValue;
console.log(array1.reduce(callback));
console.log(array1.reduce(callback, 5));
Array.prototype.myReduce = function(callback, acc) {
if (!acc) {
acc = this.shift();
}
this.forEach(function(element) {
acc = callback(acc, element)
})
return acc;
}