tamizhgeek

\documentclass {beamer}

\usepackage{graphics}
\usepackage{listings}


\usetheme{Berkeley}

\title {Plugin frameworks}
\subtitle {3 approaches to designing plugin APIs}

tamizhgeek

diff --git a/lib/spreadsheet/workbook.rb b/lib/spreadsheet/workbook.rb
index 06e17af..eef4f19 100644
--- a/lib/spreadsheet/workbook.rb
+++ b/lib/spreadsheet/workbook.rb
@@ -56,6 +56,12 @@ module Spreadsheet
       add_worksheet Worksheet.new(opts)
     end
     ##
+    # Returns the count of total worksheets present.
+    # Takes no arguments. Just returns the length of @worksheets array.

tamizhgeek

class Contact {

    protected String name;
    protected String number;
    protected String id;

    protected Contact(String name, String number) {
        this.name = name;
        this.number = number;
    }

tamizhgeek

public class ContactActivity extends ListActivity {
	private EditText filterText;
	private ArrayAdapter<Contact> adapter;
	@Override
	public void onCreate(Bundle icicle) {
		super.onCreate(icicle);
		// Use our custom layout
		setContentView(R.layout.contact);
		

tamizhgeek

.present? is opposite of .blank? = Don't use ugly !blank?

xx

Missing attribute error occurs when you don't select a certain attr in SQL query but 
try to use it in ActiveRecord.

xx

User Time.now.to_s(:db) while comparing datetime in mysql.

tamizhgeek

class AAA < ActiveRecord::Base

 belongs_to :parent, :class_name => "AAA", :foreign_key => "parent_id"

end

tamizhgeek

?> a = AAA.new()
=> #<AAA id: nil, parent_id: nil>
>> a.save!
=> true
>> b = AAA.new()
=> #<AAA id: nil, parent_id: nil>
>> b.save!
=> true
>> b.parent = a
=> #<AAA id: 1, parent_id: nil>

tamizhgeek

package assignments

object ListUtils {
  def findLast(list : List[Int]) :Int = {
    list match {
      case a :: Nil => a
      case a :: b => findLast(b)
    }
  }

tamizhgeek

package assignments


object MiscUtils {
  def listPrimes(start : Int, end : Int) : List[Int] = {
    def collect(currentIdx : Int, newList : List[Int]) : List[Int] = {
      currentIdx match {
        case a if(a == 2 || a == 3 || (a % 2 != 0 && a % 3 != 0)) => collect(a + 1, newList :+ a)
        case a if(a >= end) => newList
        case a => collect(a + 1, newList)

tamizhgeek

import assignments.ListUtils._
import org.scalatest.FlatSpec

class ListUtilsTest extends FlatSpec {
  behavior of "ListUtils"

  it should "find last of the list" in  {
    assert(findLast(List(1,2,3,4,5)) == 5)
    assert(findLast(List(1)) == 1)
  }