function to find the unique elements from two arrays
var array3 = array1.filter(function(obj) { return array2.indexOf(obj) == -1; });function to find the unique elements from two arrays
var array3 = array1.filter(function(obj) { return array2.indexOf(obj) == -1; });Get all non-unique values (i.e.: duplicate/more than one occurrence) in an array
const arrayNonUniq = array => {
if (!Array.isArray(array)) {
throw new TypeError("An array must be provided!")
}
return array.filter((value, index) => array.indexOf(value) === index && array.lastIndexOf(value) !== index)
}
arrayNonUniq([1, 1, 2, 3, 3])
//=> [1, 3]
arrayNonUniq(["foo", "foo", "bar", "foo"])
//=> ['foo']Copyright © 2021 Codeinu
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