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"]
Array Comparison
| Array Function | Ruby | Java |
Hashtable Comparison
| Hashtable Function | Ruby | Java |
| Create | h = {} or
|
h = new Hashtable();
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| Initialize | h = {"key1" => "value1", "key2" => "value2" }
|
Not Available |
| Add Key to Existing Hashtable | h["key3"] = "value3"
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h.put("key3",new String("value3"));
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| Remove a Key - Value pair | h.delete("key1")
|
h.remove
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| Check if Key Exists | h.key?("key1")
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h.containsKey("key1")
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| Check if Value Exists | h.value?("value1")
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h.contains(new String("value1"));
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| Retrieve a Value Given a Key | h["key1"]
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h.get("key1")
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