Javascript filter array multiple values – example

In JavaScript to filter multiple values in an Array, you can use filter() array function.

JavaScript filter multiple values in an Array

consider the example below:

var allPersons: Array<Person>;
var found = allPersons.filter(person => {
    return name === person.name || gender === person.gender || hair === person.hair || height === person.height;
});

In the above code, we can filter an array of objects by testing whether the properties match a certain set of criteria. We can also use template object for filtering:

function findByTemplate(allPersons: Array<Person>, template: any) {
    return allPersons.filter(person => {
        return Object.keys(template).every(propertyName => person[propertyName] === template[propertyName]);
    });
}

We can use above code like below:

var found = findByTemplate(allPersons, {name: "John", gender: "Male"});
var found = findByTemplate(allPersons, {name: "John"});
var found = findByTemplate(allPersons, {name: "John", gender: "Male", hair: "Red", height: '160 cm'});