September 2017 Update

Task/Associative-array-Creation/Jq/associative-array-creation-1.jq

@@ -0,0 +1,22 @@
+# An empty object:
+{}
+
+# Its type:
+{} | type
+# "object"
+
+# An object literal:
+{"a": 97, "b" : 98}
+
+# Programmatic object construction:
+reduce ("a", "b", "c", "d") as $c ({}; . +  { ($c) : ($c|explode[.0])} )
+# {"a":97,"c":99,"b":98,"d":100}
+
+# Same as above:
+reduce range (97;101) as $i ({}; . + { ([$i]|implode) : $i })
+
+# Addition of a key/value pair by assignment:
+{}["A"] = 65  # in this case, the object being added to is {}
+
+# Alteration of the value of an existing key:
+{"A": 65}["A"] = "AA"

Task/Associative-array-Creation/Jq/associative-array-creation-2.jq

@@ -0,0 +1,15 @@
+def collisionless:
+   if type == "object" then with_entries(.value = (.value|collisionless))|tostring
+   elif type == "array" then map(collisionless)|tostring
+   else (type[0:1] + tostring)
+   end;
+
+# WARNING: addKey(key;value) will erase any previous value associated with key
+def addKey(key;value):
+  if type == "object" then  . + { (key|collisionless): value }
+  else {} | addKey(key;value)
+  end;
+
+def getKey(key): .[key|collisionless];
+
+def removeKey(key): delpaths( [ [key|collisionless] ] );

Task/Associative-array-Creation/Jq/associative-array-creation-3.jq

@@ -0,0 +1 @@
+{} | addKey(1;"one") | addKey(2; "two") | removeKey(1) | getKey(2)

Task/Associative-array-Creation/Jq/associative-array-creation-4.jq

@@ -0,0 +1 @@
+"two"