CSC/ECE 517 Summer 2008/wiki1 6 jm
Introduction
Both Ruby and Java support arrays and hash tables
Hashes in Ruby
Arrays in Ruby
Creating Arrays in Ruby
Creating an array in Ruby is as simple as
a = []
Initializing an Array in Ruby
a = ["one",45,"hello"]
Hashes in Java
Hashtable Comparison
| Hashtable Function | Ruby | Java |
| Create | h = {} or
|
h = new Hashtable();
|
| Initialize | h = {"key1" => "value1", "key2" => "value2" }
|
Not Available |
| Add Key to Existing Hashtable | h["key3"] = "value3"
|
h.put("key3",new String("value3"));
|
| Remove a Key - Value pair | h.delete("key1")
|
h.remove
|
| Check if Key Exists | h.key?("key1")
|
h.containsKey("key1")
|
| Check if Value Exists | h.value?("value1")
|
h.contains(new String("value1"));
|
| Retrieve a Value Given a Key | h["key1"]
|
h.get("key1")
|