var arr = ['Car', 'Car', 'Truck', 'Boat', 'Truck'];
var hist = {};
arr.map(function(a) {
if (a in hist) hist[a]++;
else hist[a] = 1;
});
console.log(hist);
var arr = ['Car', 'Car', 'Truck', 'Boat', 'Truck'];
var hist = {};
arr.map(function(a) {
if (a in hist) hist[a]++;
else hist[a] = 1;
});
console.log(hist);