CSC/ECE 517 Summer 2008/wiki1 6 jm

From Expertiza_Wiki
Jump to navigation Jump to search

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 = Hash.new

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")

External Links

Java Hastable Examples