var array = ['Jane','Donna','Jim','Kate']
var objects = [{name:'Jane', age:25},{name:'Jim', age:30}]
//finds the items in the array that have names within the array of objects.
var filtered = array.filter(r => objects.findIndex(obj => obj.name == r) > -1 )
console.log(filtered)var array = ['cat','dog','fish','goat']
var objects = [{pet:'cat', color:'brown'},{pet:'dog', color:'black'},{pet:'gecko', color:'green'}]
//finds the objects that match something in the list with the key pet.
var filteredObjects = objects.filter(function(obj){
return array.indexOf((obj.pet).toString()) > -1;
});
console.log(filteredObjects)var arr = [1,2,3,4],
brr = [2,4],
res = arr.filter(f => !brr.includes(f));
console.log(res);function isBigEnough(value) {
return value >= 10
}
let filtered = [12, 5, 8, 130, 44].filter(isBigEnough)
// filtered is [12, 130, 44]