Add a chaining example

shared/notes-and-examples/2026.03.18/chaining.py

@@ -0,0 +1,34 @@
+class Dictionary:
+    backing: "list" = [None] * 100
+
+    def __init__(self):
+        for i in range(len(self.backing)):
+            self.backing[i] = []
+
+    def hash(self, key: str):
+        ord_total = 0;
+        for letter in key:
+            ord_total += ord(letter)
+        return ord_total % len(self.backing)
+
+
+    def get(self, key: str):
+        index = self.hash(key)
+        for item in self.backing[index]:
+            if item[0] == key:
+                return item[1]
+        
+        return None
+
+    def set(self, key: str, value):
+        index = self.hash(key)
+        self.backing[index].append((key, value,))
+
+
+sample_dict = Dictionary()
+sample_dict.set("test string", "test value")
+sample_dict.set("tets string", "this value will *not* overwrite the other one")
+print(sample_dict.get("test string"))
+print(sample_dict.get("tets string"))
+
+print(sample_dict.backing)