How do you find the common element of two arrays?

Approach :

1. Get the two Arrays.
2. Create two hashsets and add elements from arrays tp those sets.
3. Find the common elements in both the sets using Collection. retainAll() method. This method keeps only the common elements of both Collection in Collection1.
4. Set 1 now contains the common elements only.

How do you find the common number in an array?

10 Answers. Sort the arrays. Then iterate through them with two pointers, always advancing the one pointing to the smaller value. When they point to equal values, you have a common value.

How can you find the top two most significant numbers in an array?

Approach:

1. Compare it with the first and if first is less, assign the first value to second and assign current to first.
2. If above step is not true then current element might be a candidate of second highest element, so check if current>second,if yes then assign it to second.

How do you find the intersection of two arrays in C?

C Program to Find Union & Intersection of 2 Arrays

1. /*
2. * C Program to Find Union & Intersection of 2 Arrays.
3. #include
4. #define SIZE 5.
5. void get_value(int arr[]);
6. void print_value(int arr[], int n);
7. void function_sort(int arr[]);
8. int find_intersection(int array1[], int array2[], int intersection_array[]);

How do you find the common elements in two arrays in PHP?

But PHP provides an inbuilt function (array_intersect()) which returns the common elements (intersect) of two array. array_intersect($array1, $array2) : Returns an array containing all the values of array1 that are present in array2.

How do you find the common elements of three arrays?

Let the current element traversed in ar1[] be x, in ar2[] be y and in ar3[] be z. We can have following cases inside the loop. If x, y and z are same, we can simply print any of them as common element and move ahead in all three arrays. Else If x < y, we can move ahead in ar1[] as x cannot be a common element.

How do you check if an element is present in an array in C?

Logic to search element in array

1. Input size and elements in array from user.
2. Input number to search from user in some variable say toSearch .
3. Define a flag variable as found = 0 .
4. Run loop from 0 to size .
5. Inside loop check if current array element is equal to searched number or not.

How do you find an element in an array in Matlab?

Direct link to this answer

1. You can use the “find” function to return the positions corresponding to an array element value. For example:
2. To get the row and column indices separately, use:
3. If you only need the position of one occurrence, you could use the syntax “find(a==8,1)”.