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);
}remove duplicates strig javascript
const arr = [1, 2, [3, 4]];
// To flat single level array
arr.flat();
// is equivalent to
arr.reduce((acc, val) => acc.concat(val), []);
// [1, 2, 3, 4]
// or with decomposition syntax
const flattened = arr => [].concat(...arr);Copyright © 2021 Codeinu
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