CSC/ECE 517 Summer 2008/wiki1 6 jm: Difference between revisions
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|'''Check if Key Exists''' | |'''Check if Key Exists''' | ||
|<code>h.key?("key1")</code> | |<code>h.key?("key1")</code> | ||
|to do | |||
|- | |||
|'''Check if Value Exists''' | |||
|<code>h.value?("value1")</code> | |||
|to do | |||
|-'''Retrieve a Value Given a Key''' | |||
|<code>h["key1"]</code> | |||
|to do | |to do | ||
{| | {| | ||
Revision as of 17:01, 6 June 2008
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
Arrays in Java
| Hashtable Function | Ruby | Java |
| Create | h = {} or
|
TO DO
|
| Initialize | h = {"key1" => "value1", "key2" => "value2" }
|
TO DO |
| Add Key to Existing Hashtable | h["key3"] = "value3"
|
To Do |
| Remove a Key - Value pair | h.delete("key1")
|
to do |
| Check if Key Exists | h.key?("key1")
|
to do |
| Check if Value Exists | h.value?("value1")
|
to do |
h["key1"]
|
to do
|