added new Hashmap code

Author: joeyajames

HashMap.py

@@ -0,0 +1,66 @@
+# Hash Map
+
+class HashMap:
+	def __init__(self):
+		self.size = 6
+		self.map = [None] * self.size
+		
+	def _get_hash(self, key):
+		hash = 0
+		for char in str(key):
+			hash += ord(char)
+		return hash % self.size
+		
+	def add(self, key, value):
+		key_hash = self._get_hash(key)
+		key_value = [key, value]
+		
+		if self.map[key_hash] is None:
+			self.map[key_hash] = list([key_value])
+			return True
+		else:
+			for pair in self.map[key_hash]:
+				if pair[0] == key:
+					pair[1] = value
+					return True
+			self.map[key_hash].append(key_value)
+			return True
+			
+	def get(self, key):
+		key_hash = self._get_hash(key)
+		if self.map[key_hash] is not None:
+			for pair in self.map[key_hash]:
+				if pair[0] == key:
+					return pair[1]
+		return None
+			
+	def delete(self, key):
+		key_hash = self._get_hash(key)
+		
+		if self.map[key_hash] is None:
+			return False
+		for i in range (0, len(self.map[key_hash])):
+			if self.map[key_hash][i][0] == key:
+				self.map[key_hash].pop(i)
+				return True
+			
+	def print(self):
+		print('---PHONEBOOK----')
+		for item in self.map:
+			if item is not None:
+				print(str(item))
+			
+h = HashMap()
+h.add('Bob', '567-8888')
+h.add('Ming', '293-6753')
+h.add('Ming', '333-8233')
+h.add('Ankit', '293-8625')
+h.add('Aditya', '852-6551')
+h.add('Alicia', '632-4123')
+h.add('Mike', '567-2188')
+h.add('Aditya', '777-8888')
+h.print()		
+h.delete('Bob')
+h.print()
+print('Ming: ' + h.get('Ming'))
+