update

Task/Collections/Aime/collections-1.aime

@@ -0,0 +1 @@
+list l;

Task/Collections/Aime/collections-2.aime

@@ -0,0 +1,3 @@
+l_p_integer(l, 0, 7);
+l_push(l, "a string");
+l_append(l, 2.5);

Task/Collections/Aime/collections-3.aime

@@ -0,0 +1,3 @@
+l_query(l, 2);
+l_head(l);
+l_q_text(l, 1);

Task/Collections/Aime/collections-4.aime

@@ -0,0 +1 @@
+record r;

Task/Collections/Aime/collections-5.aime

@@ -0,0 +1,2 @@
+r_p_integer(r, "key1", 7);
+r_put(r, "key2", "a string");

Task/Collections/Aime/collections-6.aime

@@ -0,0 +1,2 @@
+r_query(r, "key1");
+r_tail(r);

Task/Collections/Racket/collections.rkt

@@ -0,0 +1,8 @@
+#lang racket
+
+;; create a list
+(list 1 2 3 4)
+;; create a list of size N
+(make-list 100 0)
+;; add an element to the front of a list (non-destructively)
+(cons 1 (list 2 3 4))

Task/Collections/Ruby/collections-1.rb

@@ -1,8 +1,12 @@
 # creating an empty array and adding values
 
-a = []            # => []
-a[0] = 1          # => [1]
-a[3] = 2          # => [1, nil, nil, 2]
+a = []              #=> []
+a[0] = 1            #=> [1]
+a[3] = "abc"        #=> [1, nil, nil, "abc"]
+a << 3.14           #=> [1, nil, nil, "abc", 3.14]
 
 # creating an array with the constructor
-a = Array.new     # => []
+a = Array.new               #=> []
+a = Array.new(3)            #=> [nil, nil, nil]
+a = Array.new(3, 0)         #=> [0, 0, 0]
+a = Array.new(3){|i| i*2}   #=> [0, 2, 4]

Task/Collections/Ruby/collections-2.rb

@@ -1,9 +1,23 @@
 # creating an empty hash
 
-h = {}            # => {}
-h["a"] = 1        # => {"a" => 1}
-h["test"] = 2.4   # => {"a" => 1, "test" => 2.4}
-h[3] = "Hello"    # => {"a" => 1, "test" => 2.4, 3 => "Hello"}
+h = {}              #=> {}
+h["a"] = 1          #=> {"a"=>1}
+h["test"] = 2.4     #=> {"a"=>1, "test"=>2.4}
+h[3] = "Hello"      #=> {"a"=>1, "test"=>2.4, 3=>"Hello"}
+h = {a:1, test:2.4, World!:"Hello"}
+                    #=> {:a=>1, :test=>2.4, :World!=>"Hello"}
 
 # creating a hash with the constructor
-h = Hash.new      # => {}
+h = Hash.new        #=> {}   (default value : nil)
+p h[1]              #=> nil
+h = Hash.new(0)     #=> {}   (default value : 0)
+p h[1]              #=> 0
+p h                 #=> {}
+h = Hash.new{|hash, key| key.to_s}
+                    #=> {}
+p h[123]            #=> "123"
+p h                 #=> {}
+h = Hash.new{|hash, key| hash[key] = "foo#{key}"}
+                    #=> {}
+p h[1]              #=> "foo1"
+p h                 #=> {1=>"foo1"}

Task/Collections/Ruby/collections-3.rb

@@ -0,0 +1,22 @@
+# creating a struct
+
+Person = Struct.new(:name, :age, :sex)
+
+a = Person.new("Peter", 15, :Man)
+p a[0]              #=> "Peter"
+p a[:age]           #=> 15
+p a.sex             #=> :Man
+p a.to_a            #=> ["Peter", 15, :Man]
+p a.to_h            #=> {:name=>"Peter", :age=>15, :sex=>:Man}
+
+b = Person.new
+p b                 #=> #<struct Person name=nil, age=nil, sex=nil>
+b.name = "Margaret"
+b["age"] = 18
+b[-1] = :Woman
+p b.values          #=> ["Margaret", 18, :Woman]
+p b.members         #=> [:name, :age, :sex]
+p b.size            #=> 3
+
+c = Person["Daniel", 22, :Man]
+p c.to_h            #=> {:name=>"Daniel", :age=>22, :sex=>:Man}