After assigning data fetched from an API to a variable called todayData, I noticed that there is a nested object named meals within it, which contains a property called name.
My goal is to determine the frequency of occurrences in the name property within the meals object.
For instance, the meal Rice might appear multiple times in the data.
DATA
[{"id":5,"referenceId":1189,"firstName":"Dan","lastName":"Daniels","orders":[{"id":109,"meals":[{"id":47,"name":"Fried Rice","description":"This is a very sweet meal","image":"","mealType":"LUNCH","unitPrice":-20,"status":"ENABLED"}],"serveDate":"2019-07-11 00:00:00"}]}]
JS
let occurences = this.todayData.reduce(function (r, row) {
r[row.orders.meals.name] = ++r[[row.orders.meals.name]] || 1;
return r;
}, {});
let result = Object.keys(occurences).map(function (key) {
return { meals: key, count: occurences[key] };
});
console.log(result);