When passing a callback to filter. value, index and Array object is passed to the callback parameters, so how is it possible for me to create a reusable filter callback where i can pass any animal type and filter accordingly.
I did look at How do I pass an extra parameter to the callback function in Javascript .filter() method? but could not get it to work as intended
let animals = [
{ name: "fiddo", type: "dog" },
{ name: "garfield", type: "cat" },
{ name: "diddi", type: "bird" },
{ name: "bob", type: "cat" },
];
This is what i want to do, I know it is not possible, but how could i achive something "similar"?
function filterAnyAnimal(animal, index, arr, typeVariable) {
if (animal.type === typeVariable) {
return true;
}
return false;
}
console.log(animals.filter(filterAnyAnimal));
do i really have to do like this? or is there a way to pass a variable?
function isDog(animal) {
if (animal.type === "dog") {
return true;
}
return false;
}
As felix-kling comment said and his already answer, you could do:
let animals = [
{ name: "fiddo", type: "dog" },
{ name: "garfield", type: "cat" },
{ name: "diddi", type: "bird" },
{ name: "bob", type: "cat" },
];
function filterAnyAnimal(typeVariable, animalType) {
if (animalType === typeVariable) {
return true;
}
return false;
}
let wordToFilter = 'cat';
console.log(animals.filter(function(element){
return filterAnyAnimal(element.type, wordToFilter);
}));let animals = [
{ name: "fiddo", type: "dog" },
{ name: "garfield", type: "cat" },
{ name: "diddi", type: "bird" },
{ name: "bob", type: "cat" },
];
const result = animals.map(animal=>animal.type==="dog"?true:false);
console.log(result);Map function can give you the desired result