Associative array/Creation: Difference between revisions

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 =={{header|Nimrod}}==
-<lang nimrod>
+<lang nimrod>import tables
-import tables
+var
-var t: TTable[int,string] = initTable[int,string]()
+  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"]
-t[1] = "one"
+hash["spam"] = 1
-t[2] = "two"
+hash["eggs"] = 2
+hash.add("foo", 3)
-t[3] = "three"
-t.add(4,"four")
-echo "t has " & $t.len & " elements"
+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
-echo "has t key 4? " & $t.hasKey(4)
+for key, value in hash:
-echo "has t key 5? " & $t.hasKey(5)
+  echo key, ": ", value
-#iterate keys
+echo "iterate keys:" # iterating over keys
-echo "key iteration:"
+for key in hash.keys:
+  echo key
-for k in t.keys:
-  echo "at[" & $k & "]=" & t[k]
+echo "iterate values:" # iterating over values
-#itetate pairs
+for key in hash.values:
-echo "pair iteration:"
+  echo key</lang>
-for k,v in t.pairs:
-  echo "at[" & $k & "]=" & v
-</lang>
 Output:<br/>
-<pre>
+<pre>hash has 3 elements
-t has 4 elements
+hash has key foo? true
-has t key 4? true
+hash has key bar? false
+iterate pairs:
-has t key 5? false
+eggs: 2
-key iteration:
+foo: 3
-at[1]=one
+spam: 1
-at[2]=two
+iterate keys:
-at[3]=three
+eggs
-at[4]=four
+foo
-pair iteration:
+spam
-at[1]=one
+iterate values:
-at[2]=two
-at[3]=three
-at[4]=four
 </pre>
 =={{header|Objeck}}==