Any smart JSON/JS Object counting packages? - json

Question

I don't mean to be duplicating any questions, since I have read so many great answers here on StackOverflow.
Given the below JSON data:
[
{
“department”: “vice”,
“team”: [
{
"selected": "Yes"
},
{
“selected": “No”
}
],
“fund”: [
“team_a”
“team_c”
]
}
]
I want to return a count of selected, so from the above 'yes'=1 and 'no'=1.
I understand I can do it through for loop, using a simple countYes++ to return the answer, however I have 2 questions as below:
Is there any other way (i.e. using some npm package).
In my example the options are simple Yes and No, if I have a bigger list of things to count, how to count all unique ones > 0?
Thanks.

Answer 1

I tried to write using vanilla JS you can look for library like underscore, lodash for more options.
var data = [
{
"department": "vice",
"team": [
{
"selected": "Yes"
},
{
"selected": "No"
}
],
"fund": [
"team_a",
"team_c"
]
},
{
"department": "vice",
"team": [
{
"selected": "Yes"
},
{
"selected": "Yes"
}
],
"fund": [
"team_a",
"team_c"
]
},
{
"department": "vice",
"team": [
{
"selected": "Yes"
},
{
"selected": "No"
}
],
"fund": [
"team_a",
"team_c"
]
}
];
function decisionReducer(prev, next) {
var team = next.team;
if (team && Array.isArray(team)) {
team.forEach(function (row) {
if (row.selected === 'Yes') {
prev.yes += 1;
}
if (row.selected === 'No') {
prev.no += 1;
}
})
}
return prev;
};
var counter = data.reduce(decisionReducer, {yes: 0, no: 0})
console.log(counter);