js delete duplicates from array
const names = ['John', 'Paul', 'George', 'Ringo', 'John'];
let unique = [...new Set(names)];
console.log(unique); // 'John', 'Paul', 'George', 'Ringo'js delete duplicates from array
const names = ['John', 'Paul', 'George', 'Ringo', 'John'];
let unique = [...new Set(names)];
console.log(unique); // 'John', 'Paul', 'George', 'Ringo'callback without duplicates javascript
function myFunction(myArray, callBack){
var unique = myArray.filter(function(item, pos) {
//validates whether the first occurrence of current item in array
// equals the current position of the item (only return those items)
return myArray.indexOf(item) == pos;
});
//wrap your result and pass to callBack function
callBack(unique);
}Copyright © 2021 Codeinu
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