Organized readme.md of data structures and added time complexity (#31)

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* Create Array.md

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* Cleaning Readme.md

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* Create LinkedList.md

* Created New readme.md files for array and ll

Created a blob access for other readme.md files which prevents the data structures readme to get too long. Will be adding the same for stack and other data structures as well

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* added array and linked list

* Update readme.md

Data Structures/Array.md

@@ -0,0 +1,38 @@
+## Array
+An array is a data structure that stores a collection of data values in contiguous memory locations.
+
+### Example
+```
+let array = [4,3,8,1,0,14,6];
+```
+
+| Memory Location | Value |
+|-----------------|-------|
+| 1000             | 4     |
+| 1001             | 3     |
+| 1002             | 8     |
+| 1003             | 1     |
+| 1004             | 0     |
+| 1005             | 14    |
+| 1006             | 6     |
+
+Accessing an element in an array is done by indexing into it.
+```
+array[0] // 4 (index 0 is the first element) (1000)
+array[1] // 3 (index 1 is the second element) (1001)
+array[2] // 8 (index 2 is the third element) (1002)
+array[3] // 1 (index 3 is the fourth element) (1003)
+array[4] // 0 (index 4 is the fifth element) (1004)
+array[5] // 14 (index 5 is the sixth element) (1005)
+array[6] // 6 (index 6 is the seventh element) (1006)
+```
+
+#### Time complexities of some basic array operations
+
+| Operation | Time Complexity |
+|-----------------|-------|
+| Accessing an element             | O(1)     |
+| Searching an element           | O(N)     |
+| Inserting an element             | O(N)     |
+| Deleting an element             | O(N)     |
+

Data Structures/LinkedList.md

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+
+## LinkedList
+A linked list is a data structure that consists of a group of nodes where each node contains a data value and a reference (or link) to the next node in the list.
+
+### Example
+```
+let list = [4,3,1,0,14,6];
+```
+
+| Memory Location | Value |
+|-----------------|-------|
+| 1000             | 4     |
+| 1001             | 1008  |
+| 1002             | 1     |
+| 1003             | 1004  |
+| 1004             | 0     |
+| 1005             | 1006  |
+| 1006             | 14    |
+| 1007             | 1010  |
+| 1008             | 3     |
+| 1009             | 1002  |
+| 1010             | 6     |
+| 1011             | 1000  |
+
+Accessing an element in a linked list is done by traversing the list and finding the element at the correct index.
+```
+index 0 value is 4 with memory location 1000 and pointer to next node 1008
+index 1 value is 3 with memory location 1008 and pointer to next node 1002
+index 2 value is 1 with memory location 1002 and pointer to next node 1004
+index 3 value is 0 with memory location 1004 and pointer to next node 1006
+index 4 value is 14 with memory location 1006 and pointer to next node 1010
+index 5 value is 6 with memory location 1010 and pointer to first node 1000
+```
+
+#### Time complexities of some basic Linked List operations
+
+| Operation | Time Complexity |
+|-----------------|-------|
+| Accesing an element             | O(N)     |
+| Searching an element           | O(N)     |
+| Inserting an element             | O(1)     |
+| Deleting an element             | O(1)     |
+

Data Structures/readme.md

@@ -40,6 +40,18 @@ array[5] // 14 (index 5 is the sixth element) (1005)
 array[6] // 6 (index 6 is the seventh element) (1006)
 ```
 
+#### Time complexities of some basic array operations
+
+| Operation | Time Complexity |
+|-----------------|-------|
+| Accessing an element             | O(1)     |
+| Searching an element           | O(N)     |
+| Inserting an element             | O(N)     |
+| Deleting an element             | O(N)     |
+
+[More on Array](Array.md)
+
+
 ## LinkedList
 A linked list is a data structure that consists of a group of nodes where each node contains a data value and a reference (or link) to the next node in the list.
 
@@ -73,6 +85,19 @@ index 4 value is 14 with memory location 1006 and pointer to next node 1010
 index 5 value is 6 with memory location 1010 and pointer to first node 1000
 ```
 
+#### Time complexities of some basic Linked List operations
+
+| Operation | Time Complexity |
+|-----------------|-------|
+| Accesing an element             | O(N)     |
+| Searching an element           | O(N)     |
+| Inserting an element             | O(1)     |
+| Deleting an element             | O(1)     |
+
+
+[More on Linked List](LinkedList.md)
+
+
 ## Stack
 A stack is a data structure that stores a collection of data values in a LIFO (last in, first out) order.