Data commit

Task/Associative-array-Iteration/Nim/associative-array-iteration.nim

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+import tables
+
+var t: Table[int,string]
+
+t[1] = "one"
+t[2] = "two"
+t[3] = "three"
+t[4] = "four"
+
+echo "t has " & $t.len & " elements"
+
+echo "has t key 4? " & $t.hasKey(4)
+echo "has t key 5? " & $t.hasKey(5)
+
+#iterate keys
+echo "key iteration:"
+for k in t.keys:
+  echo "at[" & $k & "]=" & t[k]
+
+#iterate pairs
+echo "pair iteration:"
+for k,v in t.pairs:
+  echo "at[" & $k & "]=" & v