Problem Statement We have to implement a groupAnagram function that takes an array of strings as input and returns a new array with anagrams grouped. The input string array is assumed to be composed entirely of lowercase English characters. Brute Force Solution If two strings are anagrams then their sorted order will be the same. Thus, anagrams could be grouped under their sorted order. The brute-force implementation of groupAnagram uses a hashmap for grouping....
Problem Statement We have to implement a twoSums() function that takes an integer array and a target value as inputs. It returns the indexes of two elements in the input array which could be summed up to the target value. It is assumed that the input array contains only one valid pair of elements that sum up to the target value. Brute Force Solution The brute-force solution will find the sum of all element pairs in the array using nested loops....
Problem Statement We have to implement an isAnagram() function that takes two strings as input and returns true if they both are anagrams and false otherwise. Multiple words could be anagrams of each other if they contain the same characters with the same frequency of occurrence. For word counter: trounce is an anagram. trouncee isn’t an anagram, because the character e appears twice in trouncee. tounce isn’t an anagram, because the character r is missing....
Problem Statement We have to implement a function containsDuplicate() that takes an integer array as input and returns true if an element occurs more than once and false otherwise. Brute Force Solution The simplest solution for this problem would be two nested loops, where the first loop will select an element and the second loop will select another element from the array and compare them. On the first occurrence of a duplicate element, the function will exit while returning true....
Data structures like arrays, strings, and hashmaps are available by default in most programming languages. They facilitate storage of large amounts of data in an efficient format which makes it easier (and sometimes relatively faster) to access during runtime. Arrays An array is a sequential store of data (referred to as elements). In languages like Python, an array can store elements with multiple data types, like, [1, "Hello, World", True] but for languages like Go, C++, and Java an array can store elements of a singular data type....