array datatype

Author: PTHARRISH

DSA/Array.py

@@ -36,3 +36,88 @@
 # u - unicode character - allow unicode character values
 # b - signed byte integer - allow positive and negative byte integer values
 # B - unsigned byte integer - allow positive byte integer values only
+
+
+from array import *
+
+a=array('i',[-1,2,3,4,5])
+
+print(a) # array('i', [1, 2, 3, 4, 5])
+
+a=array('I',[1,2,3,4,5])
+
+print(a) # array('I', [1, 2, 3, 4, 5])
+
+# a=array('i',[1,2,3,4,5,'a'])
+
+# print(a) # TypeError: 'str' object cannot be interpreted as an integer
+
+# a=array('I',[-1,2,3,4,5])
+
+# print(a) OverflowError: can't convert negative value to unsigned int
+
+a=array('u',['a','b','c'])
+
+print(a) # array('u', 'abc')
+
+a=array('b',[-1,2,3,3]) # array('b', [-1, 2, 3, 3])
+
+print(a) #TypeError: 'str' object cannot be interpreted as an integer
+
+a=array('f',[-1,2,3,3.0]) # array('f', [-1.0, 2.0, 3.0, 3.0])
+
+print(a) # convert int to float
+
+a=array('d',[-1,2,3,3.00500050]) # array('d', [-1.0, 2.0, 3.0, 3.0050005])
+
+print(a) # convert int to double
+
+# a=array('B',[-1,2,3])
+
+# print(a) # OverflowError: unsigned byte integer is less than minimum
+
+# Array Operations and its Time complexity
+# n - length of array, i - index
+# Accessing - O(1)
+# Inserting - Best O(1) Inserting at last, Worst O(n-i) Insert at any position
+# Deleting  - Best O(1) Deleting at last, Worst O(n-i) Delete at any position
+# Seaching  - Best O(1) got in first position, Average O(n-i) may got in middle ,Worst O(n) got at last postion
+
+
+print("------------------------------------------ Adding Element to a array ------------------------------------------")
+# Adding Elements to a Array
+# Elements can be added to the Array by using built-in insert() function. 
+
+# Insert():
+# Insert is used to insert one or more data elements into an array. 
+# a new element can be added at the beginning, end, or any given index of array. 
+
+# append(): 
+# append() is also used to add the value mentioned in its arguments at the end of the array. 
+
+
+import array as arr
+a = arr.array('i', [1, 2, 3])
+print("Array before insertion : ", end=" ")
+for i in range(0, 3):
+	print(a[i], end=" ")
+print()
+
+a.insert(1, 4)
+print("Array after insertion : ", end=" ")
+for i in (a):
+	print(i, end=" ")
+print()
+
+b = arr.array('d', [2.5, 3.2, 3.3])
+print("Array before insertion : ", end=" ")
+for i in range(0, 3):
+	print(b[i], end=" ")
+print()
+
+b.append(4.4)
+print("Array after insertion : ", end=" ")
+for i in (b):
+	print(i, end=" ")
+print()
+