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Task/Associative-array-Creation/Nim/associative-array-creation.nim

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+import tables
+
+var
+  hash = initTable[string, int]() # empty hash table
+  hash2 = {"key1": 1, "key2": 2}.toTable # hash table with two keys
+  hash3 = [("key1", 1), ("key2", 2)].toTable # hash table from tuple array
+  hash4 = @[("key1", 1), ("key2", 2)].toTable # hash table from tuple seq
+  value = hash2["key1"]
+
+hash["spam"] = 1
+hash["eggs"] = 2
+hash.add("foo", 3)
+
+echo "hash has ", hash.len, " elements"
+echo "hash has key foo? ", hash.hasKey("foo")
+echo "hash has key bar? ", hash.hasKey("bar")
+
+echo "iterate pairs:" # iterating over (key, value) pairs
+for key, value in hash:
+  echo key, ": ", value
+
+echo "iterate keys:" # iterating over keys
+for key in hash.keys:
+  echo key
+
+echo "iterate values:" # iterating over values
+for key in hash.values:
+  echo key