vamsitallapudi

class Node:
    def __init__(self, data=None):
        self.data = data
        self.next = None


class SinglyLinkedList:
    def __init__(self):
        self.head = None

vamsitallapudi

def insert_at_pos(head, data, position):
    # edge case: check if pos is 0
    new_node = Node(data)
    if position is 0:
        new_node.next = head
        head = new_node
        return head

    pos = 0
    new_node = Node(data)

vamsitallapudi

def insert_at_end(head, data):
    new_node = Node(data)
    current = head
    while current.next:  # traversing till the last node
        current = current.next
    # change the next of last node
    current.next = new_node
    return head

vamsitallapudi

# insertion of new node at front of linked list
def insert_at_front(head, data):
    # creating new node to be inserted
    new_node = Node(data)
    new_node.next = head  # pointing the new node's next to head
    head = new_node  # making the new node as head
    return head

vamsitallapudi

class Node:
    def __init__(self, data):
        self.data = data  # assigning the data passed
        self.next = None  # initializing the node as null


class LinkedList:
    def __init__(self):
        self.head = None

vamsitallapudi

class Node:
    def __init__(self, data):
        self.data = data  # assigning the data passed
        self.next = None  # initializing the node as null


class LinkedList:
    def __init__(self):
        self.head = None

vamsitallapudi

class Node:
    def __init__(self, data):
        self.data = data # assigning the data passed
        self.next = None # initializing the node as null

vamsitallapudi

class PermutationInString {
    fun checkInclusion(s1:String, s2: String): Boolean {
        val len1 = s1.length
        val len2 = s2.length
        val value = Array(26) {0}
        if (len2 < len1) return false

        for (i in 0 until len1) {
//            filling value array with the frequencies of string 1
            value[s1[i] - 'a']++

vamsitallapudi

...

val providers = ServiceLoader.load(DataSourceProvider::class.java, null)
val dataSources = providers.map {
  it.getDataSource(activity)
}.toSet()

...

vamsitallapudi

interface DataSourceProvider {
  fun getDataSource(context:Context):DataSource
}