js array count elements code example
Example 1: use .map to count length of each element in an array
var lengths = chars.map(function(word){
return word.length
})
Example 2: use .map to count length of each element in an array
var words = ['Hello', 'world'];
var lengths = words.map(function(word) {
return word + ' = ' + word.length;
});
console.log(lengths);