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Dec 14, 2023 · Given an array arr of N elements, the task is to find the length of the smallest subarray of the given array that contains at least one duplicate element. A subarray is formed from consecutive elements of an array.
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3 days ago · Find duplicates in O (n) time and O (1) extra space | Set 1. Last Updated : 16 Jul, 2024. Given an array of n elements that contains elements from 0 to n-1, with any of these numbers appearing any number of times. Find these repeating numbers in O (n) and use only constant memory space.
Given an array arr of size n which contains elements in range from 0 to n-1, you need to find all the elements occurring more than once in the given array. Return the answer in ascending order. If no such element is found, return list containing
In this article, you will learn 10 different ways to find duplicate elements in an array in JavaScript. We will also compare the efficiency of each method by calculating the time taken by each method to find the duplicates. 1. Using Nested for loop. The most basic way to find duplicate elements in an array is by using a nested for loops.
Jul 3, 2021 · There are multiple methods available to check if an array contains duplicate values in JavaScript. You can use the indexOf() method, the Set object, or iteration to identify repeated items in an array. Set Object. Set is a special data structure introduced in ES6 that stores a collection of unique values.
Jul 18, 2012 · This method finds both the indices of duplicates and values for distinct sets of duplicates. import numpy as np A = np.array([1,2,3,4,4,4,5,6,6,7,8]) # Record the indices where each unique element occurs. list_of_dup_inds = [np.where(a == A)[0] for a in np.unique(A)] # Filter out non-duplicates. list_of_dup_inds = filter(lambda inds: len(inds ...
Dec 26, 2016 · Here are two more ways of finding a duplicate. Use a set. require 'set' def find_a_dup_using_set(arr) s = Set.new arr.find { |e| !s.add?(e) } end find_a_dup_using_set arr #=> "hello" Use select in place of find to return an array of all duplicates. Use Array#difference
Nov 9, 2022 · Learn to find, count and remove duplicate elements from an array in Java using Streams, Map and Set from the Collections framework.
Sep 30, 2018 · Given an array of n + 1 integers between 1 and n, find one of the duplicates. If there are multiple possible answers, return one of the duplicates. If there is no duplicate, return -1.
