lodash - How to count same items with specail form in a array (javascript) -

for example:

input: var arr = ['a','b','c','a-5','c-2']; output: var result = {'a':6,'b':1,'c':'3'} ; 

my solution is:

function countsameitem(arr) { var counter = {}; (var = 0; < arr.length; i++) {   var item = arr[i].split('-');   if (item.length === 1) {     counter[item] = (counter[item] + 1) || 1;   } else {     counter[item[0]] = (counter[item[0]] + parseint(item[1]) || parseint(item[1]));   } }   return counter; }  

but want thought more consise solution using lodash

you can concisely without lodash:

var result = ['a','b','c','a-5','c-2'].reduce(function(o, s) {   var = s.split('-').concat(1);   return o[a[0]] = (o[a[0]] || 0) + +a[1], o; }, object.create(null));