Написать номер в расширенной форме
// You will be given a number and you will need to return it as a string in Expanded Form. For example:
/*
// expandedForm(12); // Should return '10 + 2'
// expandedForm(42); // Should return '40 + 2'
// expandedForm(70304); // Should return '70000 + 300 + 4'
*/
const expandedForm = arr => {
let pow = []
let decimal = []
arr = arr.toString().split('')
let len = arr.length
for(let i = 0; i <= len - 1; i++){
pow.unshift(i)
}
arr.forEach((x,index) => {
x = parseInt(x)
decimal.push(x*10**pow[index])
})
let toDecimal = decimal.filter(a => a !== 0)
return toDecimal.toString().split(',').join(' + ')
};
console.log(expandedForm(70304))
// With love @kouqhar
kouqhar