im trying to make o loop in an object json so that it can show me all the doubling of the propreties.
This is my JSON file (departements-list.json):
[
{"Departement": "meryem"},
{"Departement": "meryem"},
{"Departement": "meryem"},
{"Departement": "meryem"},
{"Departement": "meryem"},
{"Departement": "sara"},
{"Departement": "sara"},
{"Departement": "sara"},
{"Departement": "ouss"},
{"Departement": "ouss"},
{"Departement": "ouss"},
{"Departement": "samati"},
{"Departement": "samati"},
{"Departement": "samati"},
{"Departement": "samati"},
{"Departement": "samati"},
{"Departement": "samati"},
{"Departement": "samati"},
{"Departement": "samati"},
{"Departement": "samati"}
]
And this is my js :
import departement_list from "../data/departements-list.json";
var jsonData = JSON.parse(JSON.stringify(departement_list));
for (var dep of jsonData) {
let nb_dep = Object.keys(dep.Departement).length;
console.log(dep.Departement, " =" , nb_dep);
}
I had this result in the browser console :
meryem = 6
3custom-map.js:20 sara = 4
3custom-map.js:20 ouss = 4
9custom-map.js:20 samati = 6
Which is not logical !
This is an example of how to get the number of occurrences for each department value. I first map the data to be a list of the department values. Then I create a new set to create an array of each value. Then I loop through each unique value, and filter the data by that value, and log the length or number of occurrences for each value.
const jsonData = [
{"Departement": "meryem"},
{"Departement": "meryem"},
{"Departement": "meryem"},
{"Departement": "meryem"},
{"Departement": "meryem"},
{"Departement": "sara"},
{"Departement": "sara"},
{"Departement": "sara"},
{"Departement": "ouss"},
{"Departement": "ouss"},
{"Departement": "ouss"},
{"Departement": "samati"},
{"Departement": "samati"},
{"Departement": "samati"},
{"Departement": "samati"},
{"Departement": "samati"},
{"Departement": "samati"},
{"Departement": "samati"},
{"Departement": "samati"},
{"Departement": "samati"}
];
const dataValues = jsonData.map(data => data.Departement);
const uniqueValues = [...new Set(dataValues)];
for (const val of uniqueValues) {
console.log(`
Val ${val}
has ${dataValues.filter(v => v == val).length} entries
`);
}