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  <channel>
    <title>ROHIT</title>
    <link>http://jbake.org</link>
    <atom:link href="http://jbake.org/feed.xml" rel="self" type="application/rss+xml" />
    <description>JBake Bootstrap Template</description>
    <language>en-gb</language>
    <pubDate>Fri, 8 Dec 2017 00:10:42 +0530</pubDate>
    <lastBuildDate>Fri, 8 Dec 2017 00:10:42 +0530</lastBuildDate>

    <item>
      <title>Functional Programming in JavaScript, Clojure, Kotlin, Java and Python-Part 1</title>
      <link>http://jbake.org/blog/2017/FunctionalProgramming.html</link>
      <pubDate>Sun, 19 Nov 2017 00:00:00 +0530</pubDate>
      <guid isPermaLink="false">blog/2017/FunctionalProgramming.html</guid>
      	<description>
	
&lt;div&gt;
    &lt;p&gt;&lt;b&gt;Map Reduce and Filter&lt;/b&gt; are functional Idioms you frequently encounter in functional programming.
        This is first of the series of posts that shows the comparison of functional capabilities across languages.
    &lt;/p&gt;
    &lt;p&gt;Map, Reduce and Filter are higher order functions.
        In Mathematics a higher order function are function that operate on other functions either by taking them
        as arguments or returning them.&lt;/p&gt;

&lt;/div&gt;
&lt;!--more--&gt;
&lt;h2&gt;Map&lt;/h2&gt; &lt;b&gt;Map&lt;/b&gt;
applies a function to every item of a List/Array/Iterable/Sequence. It’s behaviour is to derive a new List/Array/Iterable/sequence y from existing List/Array/Iterable/Sequence of x.
&lt;p align=&quot;center&quot;&gt;&lt;b&gt;y1=f(x1) y2=f(x2) y3=f(x3) y4=f(x4)&lt;/b&gt;&lt;/p&gt;
&lt;p&gt;
    I will interchangeably use the terms List/Array/Iterable/Sequence going forward. Assume relevant meaning from the context.&lt;/p&gt;

&lt;a href=&quot;../../images/map.png&quot;&gt;
    &lt;p align=&quot;center&quot;&gt;
        &lt;img  src=&quot;../../images/map.png&quot; class=&quot;img-rounded&quot; alt=&quot;Map Higher Order Function&quot;/&gt;
    &lt;/p&gt;
&lt;/a&gt;
&lt;/p&gt;
Now that we know what a Map is lets use it in different programming languages.&lt;/br&gt;
&lt;/br&gt;
&lt;p align=&quot;center&quot;&gt; &lt;b&gt;Lets increment the numbers in the list by 1&lt;/b&gt;&lt;/p&gt;
&lt;P&gt;
    &lt;b&gt;JavaScript&lt;/b&gt;
&lt;pre class=&quot;prettyprint&quot;&gt;
&lt;code&gt;

list=[0,1,2,3,4]

function inc(num){
 return ++num;
}

list.map(inc)

Output: [ 1, 2, 3, 4, 5 ]
&lt;/code&gt;
&lt;/pre&gt;

&lt;/P&gt;

&lt;P&gt;
    &lt;b&gt;Java&lt;/b&gt;
&lt;pre class=&quot;prettyprint&quot;&gt;
&lt;code&gt;

IntStream.range(0,5)
                .map(x-&gt;++x)
                .forEach(
                        x-&gt;{
                            System.out.print(x + &quot; &quot;);
                        }
                );

Output: 1 2 3 4 5
&lt;/code&gt;
&lt;/pre&gt;

&lt;/P&gt;
&lt;P&gt;
    &lt;b&gt;Kotlin&lt;/b&gt;
&lt;pre class=&quot;prettyprint&quot;&gt;
&lt;code&gt;
print((0..4).map { it + 1 })

Output: 1 2 3 4 5
&lt;/code&gt;
&lt;/pre&gt;

&lt;/P&gt;

&lt;P&gt;
    &lt;b&gt;Clojure&lt;/b&gt;
&lt;pre class=&quot;prettyprint&quot;&gt;
&lt;code&gt;

(map inc [0 1 2 3 4 5])
Output: (1 2 3 4 5 6)

&lt;/code&gt;
&lt;/pre&gt;

&lt;/P&gt;

&lt;P&gt;
    &lt;b&gt;Python&lt;/b&gt;
&lt;pre class=&quot;prettyprint&quot;&gt;
&lt;code&gt;

def inc(x):
    return x+1;

list=[0,1,2,3,4]

for num in map(inc,list):
    print(num)

Output:
1
2
3
4
5
&lt;/code&gt;
&lt;/pre&gt;

&lt;/P&gt;


&lt;h2&gt;Reduce&lt;/h2&gt;

&lt;b&gt;Reduce&lt;/b&gt; is similar to Map that it applies a function on the list.
However unlike Map it does not produce a list.
It produces a single value as a result of reduction or &lt;a href=&quot;https://en.wikipedia.org/wiki/Fold_(higher-order_function)&quot;&gt;folding process&lt;/a&gt;.
&lt;p&gt;
    The operation to be performed should be &lt;a href=&quot;https://en.wikipedia.org/wiki/Associative_property&quot;&gt;associative&lt;/a&gt; to attain correct result. For instance
    +,* are associative where as / and - are not.
&lt;/p&gt;

&lt;a href=&quot;../../images/reduce.png&quot;&gt;
    &lt;p align=&quot;center&quot;&gt;
        &lt;img  src=&quot;../../images/reduce.png&quot; class=&quot;img-rounded&quot; alt=&quot;Reduce Higher Order Function&quot;/&gt;
    &lt;/p&gt;
&lt;/a&gt;

Now that we know what reduction is lets solve a problem.&lt;/br&gt;
&lt;/br&gt;
&lt;p align=&quot;center&quot;&gt;&lt;b&gt;Lets add up all numbers in the list.&lt;/b&gt;&lt;/p&gt;

&lt;/br&gt;
&lt;P&gt;
    &lt;b&gt;JavaScript&lt;/b&gt;
&lt;pre class=&quot;prettyprint&quot;&gt;
&lt;code&gt;

numbers=[1,2,3,4,5]
numbers.reduce((a,b)=&gt;a+b)

Output: 15
&lt;/code&gt;
&lt;/pre&gt;

&lt;/P&gt;

&lt;P&gt;
    &lt;b&gt;Java&lt;/b&gt;
&lt;pre class=&quot;prettyprint&quot;&gt;
&lt;code&gt;

System.out.println(IntStream.range(1,6)
                .reduce((a,b)-&gt;a+b)
                .getAsInt());

Output: 15
&lt;/code&gt;
&lt;/pre&gt;

&lt;/P&gt;

&lt;P&gt;
    &lt;b&gt;Kotlin&lt;/b&gt;
&lt;pre class=&quot;prettyprint&quot;&gt;
&lt;code&gt;
print((1..5).reduce { sum, next -&gt; sum + next })
Output: 15
&lt;/code&gt;
&lt;/pre&gt;

&lt;/P&gt;
&lt;P&gt;
    &lt;b&gt;Clojure&lt;/b&gt;
&lt;pre class=&quot;prettyprint&quot;&gt;
&lt;code&gt;

(reduce + [1,2,3,4,5])

Output: 15

&lt;/code&gt;
&lt;/pre&gt;

&lt;/P&gt;

&lt;P&gt;
    &lt;b&gt;Python&lt;/b&gt;
&lt;pre class=&quot;prettyprint&quot;&gt;
&lt;code&gt;

numbers=[1,2,3,4,5]
reduce(lambda x,y:x+y,numbers)

Output: 15
&lt;/code&gt;
&lt;/pre&gt;

&lt;/P&gt;

&lt;h2&gt;Filter&lt;/h2&gt; &lt;b&gt; Filter function&lt;/b&gt;takes a list and returns a list. The filtered list preserves the same order.
Only elements satisfying a predicate are returned. A Predicate is boolean valued function.
&lt;/br&gt;
&lt;/br&gt;

&lt;a href=&quot;../../images/filter.png&quot;&gt;
    &lt;p align=&quot;center&quot;&gt;
        &lt;img  src=&quot;../../images/filter.png&quot; class=&quot;img-rounded&quot; alt=&quot;Reduce Higher Order Function&quot;/&gt;
    &lt;/p&gt;
&lt;/a&gt;

&lt;/br&gt;
&lt;/br&gt;
&lt;p align=&quot;center&quot;&gt;&lt;b&gt;Lets filter out only even numbers from a list.&lt;/b&gt;&lt;/p&gt;


&lt;P&gt;
    &lt;b&gt;JavaScript&lt;/b&gt;
&lt;pre class=&quot;prettyprint&quot;&gt;
&lt;code&gt;

list=[0,1,2,3,4,5,6,7,8,9,10]
list.filter(x=&gt;x%2==0)

Output:[ 0, 2, 4, 6, 8, 10 ]

&lt;/code&gt;
&lt;/pre&gt;

&lt;/P&gt;

&lt;P&gt;
    &lt;b&gt;Java&lt;/b&gt;
&lt;pre class=&quot;prettyprint&quot;&gt;
&lt;code&gt;


IntStream.range(0,10)
                .filter(x-&gt;x%2==0)
                .forEach(x-&gt;{
                    System.out.println(x);
                });
Output:
0
2
4
6
8

&lt;/code&gt;
&lt;/pre&gt;

&lt;/P&gt;
&lt;P&gt;
    &lt;b&gt;Kotlin&lt;/b&gt;
&lt;pre class=&quot;prettyprint&quot;&gt;
&lt;code&gt;
print((0..10).filter { it % 2 == 0 })

Output:[ 0, 2, 4, 6, 8, 10 ]

&lt;/code&gt;
&lt;/pre&gt;

&lt;/P&gt;


&lt;P&gt;
    &lt;b&gt;Clojure&lt;/b&gt;
&lt;pre class=&quot;prettyprint&quot;&gt;
&lt;code&gt;

(filter even? (range 0 11))
Output: (0 2 4 6 8 10)
&lt;/code&gt;
&lt;/pre&gt;

&lt;/P&gt;

&lt;P&gt;
    &lt;b&gt;Python&lt;/b&gt;
&lt;pre class=&quot;prettyprint&quot;&gt;
&lt;code&gt;

filter(lambda x:x%2==0,range(0,10))

Output:[0, 2, 4, 6, 8]

&lt;/code&gt;
&lt;/pre&gt;

I hope you liked the post. Please share your comments.
&lt;/br&gt;
&lt;p&gt;&amp;nbsp&lt;/p&gt;
&lt;b&gt;Credits:&lt;/b&gt;Kotlin code was contributed by &lt;b&gt;Anton Kirvel&lt;/b&gt;

&lt;/p&gt;


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	</description>
    </item>
    <item>
      <title>How I taught a computer to play Chess</title>
      <link>http://jbake.org/blog/2017/Chess.html</link>
      <pubDate>Sat, 18 Mar 2017 00:00:00 +0530</pubDate>
      <guid isPermaLink="false">blog/2017/Chess.html</guid>
      	<description>
	&lt;div&gt;
  &lt;p&gt;How I taught a Computer to play Chess&lt;/br&gt;
    &lt;iframe src=&quot;//www.slideshare.net/slideshow/embed_code/key/eAtoGgxxd2atSi&quot; width=&quot;595&quot; height=&quot;485&quot; frameborder=&quot;0&quot; marginwidth=&quot;0&quot; marginheight=&quot;0&quot; scrolling=&quot;no&quot; style=&quot;border:1px solid #CCC; border-width:1px; margin-bottom:5px; max-width: 100%;&quot; allowfullscreen&gt; &lt;/iframe&gt; &lt;div style=&quot;margin-bottom:5px&quot;&gt; &lt;strong&gt; &lt;a href=&quot;//www.slideshare.net/RohitVaidya3/how-i-taught-a-computer-to-play-chess&quot; title=&quot;How i taught a computer to play chess&quot; target=&quot;_blank&quot;&gt;How i taught a computer to play chess&lt;/a&gt; &lt;/strong&gt; from &lt;strong&gt;&lt;a target=&quot;_blank&quot; href=&quot;//www.slideshare.net/RohitVaidya3&quot;&gt;Rohit Vaidya&lt;/a&gt;&lt;/strong&gt; &lt;/div&gt;
&lt;/div&gt;
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    </item>
    <item>
      <title>Functional Programming with Clojure</title>
      <link>http://jbake.org/blog/2016/Clojure.html</link>
      <pubDate>Wed, 19 Oct 2016 00:00:00 +0530</pubDate>
      <guid isPermaLink="false">blog/2016/Clojure.html</guid>
      	<description>
	&lt;div&gt;
  &lt;p&gt;Demystifying Functional Programming with Clojure.&lt;/br&gt;
    &lt;iframe src=&quot;//www.slideshare.net/slideshow/embed_code/key/lLg7DWRYVlWplq&quot; width=&quot;595&quot; height=&quot;485&quot; frameborder=&quot;0&quot; marginwidth=&quot;0&quot; marginheight=&quot;0&quot; scrolling=&quot;no&quot; style=&quot;border:1px solid #CCC; border-width:1px; margin-bottom:5px; max-width: 100%;&quot; allowfullscreen&gt; &lt;/iframe&gt; &lt;div style=&quot;margin-bottom:5px&quot;&gt; &lt;strong&gt; &lt;a href=&quot;//www.slideshare.net/RohitVaidya3/clojure-67414947&quot; title=&quot;Clojure&quot; target=&quot;_blank&quot;&gt;Clojure&lt;/a&gt; &lt;/strong&gt; from &lt;strong&gt;&lt;a target=&quot;_blank&quot; href=&quot;//www.slideshare.net/RohitVaidya3&quot;&gt;Rohit Vaidya&lt;/a&gt;&lt;/strong&gt; &lt;/div&gt;
&lt;/div&gt;
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	</description>
    </item>
    <item>
      <title>Syncing Emacs Org Files</title>
      <link>http://jbake.org/blog/2016/Emacs-Org-Mode-Syncing.html</link>
      <pubDate>Thu, 29 Sep 2016 00:00:00 +0530</pubDate>
      <guid isPermaLink="false">blog/2016/Emacs-Org-Mode-Syncing.html</guid>
      	<description>
	
&lt;p&gt;
I like to use &lt;a href=&quot;http://orgmode.org/&quot;&gt;org mode&lt;/a&gt; with &lt;a href=&quot;https://www.gnu.org/software/emacs/&quot;&gt;Emacs&lt;/a&gt;. It helps me stay organized. The long vertical green
lines of accomplished tasks gives me immense satifaction.
I also heavily use org-agenda feature which helps me keep track of multiple org files.
However syncing org mode files across machines like work place computer and personal laptop
is a pain. I tried using &lt;a href=&quot;http://orgmode.org/manual/MobileOrg.html&quot;&gt;mobile-org&lt;/a&gt; but could never set it up correctly. Here is a better alternative.
&lt;!--more--&gt;
&lt;p&gt;

  &lt;a href=&quot;../../images/todo.png&quot;&gt;
  &lt;img src=&quot;../../images/todo.png&quot; class=&quot;img-rounded&quot; alt=&quot;Emacs Todo&quot; width=&quot;304&quot; height=&quot;236&quot;/&gt;
  &lt;/a&gt;
  &lt;a href=&quot;../../images/git-blame-buffer.png&quot;&gt;
  &lt;img src=&quot;../../images/git-blame-buffer.png&quot; class=&quot;img-rounded&quot; alt=&quot;Git Buffer in Emacs&quot; width=&quot;304&quot; height=&quot;236&quot;/&gt;
  &lt;/a&gt;
  &lt;a href=&quot;../../images/cfw.png&quot;&gt;
  &lt;img src=&quot;../../images/cfw.png&quot; class=&quot;img-rounded&quot; alt=&quot;Cfw Calendar&quot; width=&quot;304&quot; height=&quot;236&quot;/&gt;
  &lt;/a&gt;
&lt;p&gt;
A better option is to use a version control like git. I wanted to avoid public
repository as I don&apos;t want my org files to be publically forked :-).
Bitbuket allows you to have private repositories. Create one. Atlassian is simply cool.
&lt;p&gt;
Install git-blame and git from melpa repository. Edit your org mode files.
Commit them using git-blame buffer. Push. Syncing is fun.

&lt;p&gt;
The only pain point with git-blame is you cannot push. May be I will find a better alternative.
For now I use
&lt;b&gt;M-x shell-command&lt;/b&gt; to enter my push commands &quot;git push orgin master&quot; and it works
like breeze.

Also, the &lt;a href=&quot;https://github.com/kiwanami/emacs-calfw&quot;&gt;cfw calendar&lt;/a&gt; is simply awesome.
Synced it with google calendar and you
have everything in google calendar.
&lt;p&gt;
Happy Syncing. Please let me know your thoughts.
&lt;/div&gt;
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    </item>
    <item>
      <title>Guava</title>
      <link>http://jbake.org/blog/2016/Guava-Library.html</link>
      <pubDate>Thu, 16 Jun 2016 00:00:00 +0530</pubDate>
      <guid isPermaLink="false">blog/2016/Guava-Library.html</guid>
      	<description>
	&lt;div&gt;
  &lt;p&gt;Guava. A presentation given at &lt;a href=&quot;http://www.meetup.com/jughyderabad/events/228339958/&quot;&gt;JUG Hyderabad&lt;/a&gt;. The presentation covers String, Basic Utilities and caching.
  &lt;iframe src=&quot;//www.slideshare.net/slideshow/embed_code/key/Guxf3EReFESmYP&quot; width=&quot;595&quot; height=&quot;485&quot; frameborder=&quot;0&quot; marginwidth=&quot;0&quot; marginheight=&quot;0&quot; scrolling=&quot;no&quot; style=&quot;border:1px solid #CCC; border-width:1px; margin-bottom:5px; max-width: 100%;&quot; allowfullscreen&gt; &lt;/iframe&gt; &lt;div style=&quot;margin-bottom:5px&quot;&gt; &lt;strong&gt; &lt;a href=&quot;//www.slideshare.net/RohitVaidya3/gauva-62941695&quot; title=&quot;Gauva&quot; target=&quot;_blank&quot;&gt;Gauva&lt;/a&gt; &lt;/strong&gt; from &lt;strong&gt;&lt;a href=&quot;//www.slideshare.net/RohitVaidya3&quot; target=&quot;_blank&quot;&gt;Rohit Vaidya&lt;/a&gt;&lt;/strong&gt; &lt;/div&gt;

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    </item>
    <item>
      <title>Oracle JET Getting Started</title>
      <link>http://jbake.org/blog/2016/Oracle-JET-GettingStarted.html</link>
      <pubDate>Wed, 16 Mar 2016 00:00:00 +0530</pubDate>
      <guid isPermaLink="false">blog/2016/Oracle-JET-GettingStarted.html</guid>
      	<description>
	&lt;h3&gt;JavaScript Extension Toolkit &lt;/h3&gt;
&lt;div class=&quot;&quot;&gt;
  Oracle Jet Framework. This is an introductory post of Oracle JET JavaScript library. 
  Doing this excercise to evaluate the JS framework. I would be doing more focussed posts latter.
  
  &lt;h3&gt;Oracle JET Overview: &lt;/h3&gt;
  Oracle JET is a collection of Oracle and open source JavaScript Libraries. 
  A quote by Issac Newton is really apt to describe what Oracle has done. &quot;If I have seen further it is by standing 
  on the shoulders of giants&quot;
 

  &lt;h3&gt; What has JET consumed?&lt;/h3&gt;
   
  Just to illustrate a few keywords on what these libraries used for
  &lt;ol&gt;
      &lt;LI&gt; &lt;b&gt;Require JS:&lt;/b&gt; File and Module loader. Is optimised for in browser use and can be used in Javascript environments like Rhino and Node
      &lt;li&gt; &lt;b&gt; JQuery:&lt;/b&gt; Lightweight JS Library with support for standard and contemproary UI components, event handling, animation and AJAX. 
      &lt;li&gt; &lt;b&gt;Knockout:&lt;/b&gt; Data Binding, Automatic UI Refresh, Templating
      &lt;li&gt; &lt;b&gt; Promise:&lt;/b&gt; Build in object in Javacript but avaiable in Ecma Script 6. Useful for deferred and asynchronous computation. 
      &lt;li&gt; &lt;b&gt;Hammer JS:&lt;/b&gt; Support for touch gestures in JS application
      &lt;li&gt; &lt;b&gt;CrossRoads:&lt;/b&gt; Routing library. A URL Route/Dispatch library. Similar to one present in frameworks like Rails, Django etc.
      &lt;li&gt; &lt;b&gt;JS-Signals:&lt;/b&gt; custom Event/Messaging System for JavaScript
  &lt;/oL&gt;
  Thats a really comprehensive collection of js libraries which cater to needs of a modern client side application. 
 &lt;/div&gt;  &lt;!--more--&gt;

  &lt;div class=&quot;jumbotron&quot;&gt;&lt;h3&gt;What would you use Oracle JET for? &lt;/h3&gt;
  As indicated in Jet Documentation[1]
  &lt;ol&gt;
      &lt;li&gt; Add interactivity to existing pages
      &lt;li&gt; Create a new end to end client side web application with HTML5,CSS, and responsive web design
  &lt;li&gt; Create a hybrid mobile application that feels like a native Android IOS app
  &lt;/oL&gt;
  &lt;h3&gt; Getting started&lt;/h3&gt;
  Oracle JET has good tooling support to get started. One can use Yeoman or Grunt. However the easiest way to do 
  HelloWorld type project is to install Oracle Jet Support Plugin. Create a JET project selecting the Project
  Category has HTML5/Javascript. Select Oracle JET QuickStart Basic. 

  &lt;h3&gt;Understanding the Project Structure of Sample application&lt;/h3&gt;
  &lt;table&gt;
      &lt;tr&gt;   
  Site Root/css:
      &lt;tr&gt;
      &lt;tr&gt;
          &lt;td&gt;
              Site Root/js&lt;/td&gt;&lt;td&gt;The JS prerequisites for your application&lt;/td&gt;&lt;/tr&gt;
      &lt;tr&gt;&lt;td&gt;Site Root/js/main.js&lt;/td&gt;&lt;td&gt; Require.js boostrap javascript&lt;/td&gt; 
      &lt;tr&gt;&lt;td&gt;Site Root/js/main-release-path.json&lt;/td&gt;&lt;td&gt;JSON object which points to physical location of JS libraries&lt;/td&gt;
      &lt;tr&gt;&lt;td&gt;Site Root/scss:&lt;/td&gt;&lt;td&gt; Oracle JET uses SCSS files to preprocess the CSS files.  &lt;/td&gt;&lt;/tr&gt;
      &lt;tr&gt;&lt;td&gt;  Site Root/scss/alta:&lt;/td&gt;&lt;td&gt; Files belonging the alta Theme&lt;/td&gt; 
      &lt;tr&gt;&lt;td&gt;Site Root/scss/common:&lt;/td&gt;&lt;td&gt; Contains common files shared by multiple themes&lt;/td&gt;&lt;/tr&gt;
      &lt;tr&gt;&lt;td&gt; Site Root/scss/utilties:&lt;/td&gt;&lt;td&gt; Contains SASS Mixins. If you don&apos;t know CSS preprocessor read http://sass-lang.com/guide&lt;/td&gt;&lt;/tr&gt;
      &lt;tr&gt;&lt;td&gt;Site Root/scss/3rdparty:&lt;/td&gt;&lt;td&gt; Oracle&apos;s port of third party files such as normalize[2]&lt;/td&gt;
      &lt;tr&gt;&lt;td&gt;Site Root/index.html: &lt;/td&gt;&lt;/tr&gt;
  &lt;/table&gt;

  &lt;h3&gt; Understanding Require boostrap file&lt;/h3&gt;
  The boostrap file is self explanatory and indicates the modules which should be injected in the web application. 
  You can also add custom modules to be injected by require.js
  &lt;pre class=&quot;prettyprint&quot;&gt;
&lt;code&gt; 

  requirejs.config({
  // Path mappings for the logical module names
  paths: 
 //injector:mainReleasePaths
  {
    &apos;knockout&apos;: &apos;libs/knockout/knockout-3.4.0&apos;,
    &apos;jquery&apos;: &apos;libs/jquery/jquery-2.1.3.min&apos;,
    &apos;jqueryui-amd&apos;: &apos;libs/jquery/jqueryui-amd-1.11.4.min&apos;,
    &apos;promise&apos;: &apos;libs/es6-promise/promise-1.0.0.min&apos;,
    &apos;hammerjs&apos;: &apos;libs/hammer/hammer-2.0.4.min&apos;,
    &apos;ojdnd&apos;: &apos;libs/dnd-polyfill/dnd-polyfill-1.0.0.min&apos;,
    &apos;ojs&apos;: &apos;libs/oj/v2.0.0/debug&apos;,
    &apos;ojL10n&apos;: &apos;libs/oj/v2.0.0/ojL10n&apos;,
    &apos;ojtranslations&apos;: &apos;libs/oj/v2.0.0/resources&apos;,
    &apos;signals&apos;: &apos;libs/js-signals/signals.min&apos;,
    &apos;text&apos;: &apos;libs/require/text&apos;
  }
  //endinjector
  );
&lt;/code&gt;&lt;/pre&gt;
 This is a top level require call executed by the application. 
  oj,ko,$ gives access to oj(Oracle Jet),ko(KnockOut) and $(JQuery selector) namespace 
  &lt;pre class=&quot;prettyprint&quot;&gt;
&lt;code&gt; 

 require([&apos;ojs/ojcore&apos;, &apos;knockout&apos;, &apos;jquery&apos;, &apos;ojs/knockout&apos;, &apos;ojs/ojbutton&apos;, &apos;ojs/ojtoolbar&apos;, &apos;ojs/ojmenu&apos;],
  // add additional JET component libraries as needed
  function(oj, ko, $) // this callback gets executed when all required modules are loaded
  {
      // add any startup code that you want here
  }
 );
&lt;/code&gt;&lt;/pre&gt;
 Refer following documentation in [1]
  &lt;h3&gt; Understanding the index.html&lt;/h3&gt;
  The index.html has reference to require js script. The require script will take care of injecting libraries as defined 
  in the bootrap script file.
  Inspecting the HTML one can easily spot the JET CSS classes referenced. 
  &lt;pre class=&quot;prettyprint&quot;&gt;
&lt;code&gt; 
    div id=&quot;globalBody&quot; class=&quot;oj-web-applayout-offcanvas-wrapper oj-offcanvas-outer-wrapper&quot;
  &lt;/code&gt; 
  &lt;/pre&gt;
  
  Knockout js binding can be spotted here as well
&lt;pre class=&quot;prettyprint&quot;&gt;
&lt;code&gt; 
    div id=&quot;offcanvas&quot; class=&quot;oj-contrast-marker oj-web-applayout-offcanvas oj-offcanvas-start&quot;
               data-bind=&quot;ojModule: {viewName: &apos;navDrawer&apos;}
&lt;/code&gt;
  &lt;/pre&gt; 
  &lt;h3&gt;References&lt;/h3&gt;
  &lt;ol&gt; 
      &lt;li&gt; &lt;a href=&quot;https://docs.oracle.com/middleware/jet200/jet/developer/GUID-C6947139-DF37-4258-8E02-2679F40535E1.htm#JETDG108&quot;&gt;Jet Developers Guide&lt;/a&gt;
      &lt;li&gt; &lt;a href=&quot;https://github.com/JohnAlbin/normalize-scss&quot;&gt;Normalize SCSS&lt;/a&gt;
      &lt;li&gt; &lt;a href=&quot;http://knockoutjs.com/&quot;&gt;Knockout JS&lt;/a&gt;
      &lt;li&gt; &lt;a href=&quot;https://jquery.com/&quot;&gt;JQuery&lt;/a&gt;
      &lt;li&gt; &lt;a href=&quot;https://millermedeiros.github.io/crossroads.js/&quot;&gt;Crossroads&lt;/a&gt;
      &lt;li&gt;  &lt;a href=&quot;http://millermedeiros.github.io/js-signals/&quot;&gt;JS Signals&lt;/a&gt;
      &lt;li&gt; &lt;a href=&quot;http://hammerjs.github.io/&quot;&gt;Hammer JS&lt;/a&gt;
      &lt;li&gt; &lt;a href=&quot;https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Promise&quot;&gt;ES6 JS Promise &lt;/a&gt;
      &lt;li&gt; &lt;a href=&quot;http://requirejs.org/&quot;&gt;Require JS&lt;/a&gt;
      &lt;li&gt; &lt;a href=&quot;http://sass-lang.com/guide&quot;&gt;SASS&lt;/a&gt;
  &lt;/ol&gt;
&lt;/div&gt; 

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	</description>
    </item>
    <item>
      <title>Creating and Destroying Objects</title>
      <link>http://jbake.org/blog/2016/Creating-and-Destroying-Objects.html</link>
      <pubDate>Sat, 13 Feb 2016 00:00:00 +0530</pubDate>
      <guid isPermaLink="false">blog/2016/Creating-and-Destroying-Objects.html</guid>
      	<description>
	&lt;div&gt;
&lt;p&gt;Creating a Destroying Object. A presentation given at JUG Hyderabad. The content is inspired by Joshua Bloch&apos;s book The effective Java. 

&lt;iframe src=&quot;//www.slideshare.net/slideshow/embed_code/key/3TPMJ6UQr9ccN0&quot; width=&quot;595&quot; height=&quot;485&quot; frameborder=&quot;0&quot; marginwidth=&quot;0&quot; marginheight=&quot;0&quot; scrolling=&quot;no&quot; style=&quot;border:1px solid #CCC; border-width:1px; margin-bottom:5px; max-width: 100%;&quot; allowfullscreen&gt; &lt;/iframe&gt; &lt;div style=&quot;margin-bottom:5px&quot;&gt; &lt;strong&gt; &lt;a href=&quot;//www.slideshare.net/RohitVaidya3/effective-java-creating-and-destroying-objects&quot; title=&quot;Effective java - Creating and Destroying Objects&quot; target=&quot;_blank&quot;&gt;Effective java - Creating and Destroying Objects&lt;/a&gt; &lt;/strong&gt; from &lt;strong&gt;&lt;a href=&quot;//www.slideshare.net/RohitVaidya3&quot; target=&quot;_blank&quot;&gt;Rohit Vaidya&lt;/a&gt;&lt;/strong&gt; &lt;/div&gt;

&lt;/div&gt;
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	</description>
    </item>
    <item>
      <title>My Emacs CheatSheet</title>
      <link>http://jbake.org/blog/2015/Emacs-CheatSheet.html</link>
      <pubDate>Sat, 20 Jun 2015 00:00:00 +0530</pubDate>
      <guid isPermaLink="false">blog/2015/Emacs-CheatSheet.html</guid>
      	<description>
	
&lt;p&gt;This is my Emacs cheat sheet.  

&lt;!--more--&gt;
&lt;pre class=&quot;prettyprint&quot;&gt;
&lt;code&gt;
Note: If you are new to emacs C - Ctrl M - Esc key. &apos;-&apos; indicates simultaneous key press
To split a window vertically C-x 3
To split a window horizontally C-x 2
To kill a buffer C-x-0
To swtich between buffers: C-x-o
To save C-x-s
To open a new file: C-x-f
To undo C-/
To switch buffers: C-x-b. This will show a list of buffers. Switch to the buffer by selecting the buffer. 
To open a shell: M-x shell
To play tetris : M-x tetris
To kill a line: C-k
To Paste: C-y pastes last kill text. Kill with C-k
To Cut kill next word M-d
To Cut sentence M-k
To copy a selected region M-w 
To move end of buffer M-&gt;
To move to beginning of buffer M-&lt;
To move forward 4 lines C-u C-n
To move forward 16 lnes C-u C-u C-n
To jump to specified line M g g 
To search incrementally C-s (C-s again to search)
To start org-mode M-x org-mode
To search and replace C-% enter ! to replace all the occurences. y to replace current. n to skip and q to quit
To add deadline to todo item in org mode C-c-d
To open browser in emacs M-w eww [return] Type the URL
To tweet using emacs &lt;a href=&quot;http://emacswiki.org/emacs/TwitteringMode&quot;&gt;Twittering Mode&lt;/a&gt; E-w twit 
To talk to a doctor M-w doctor 
&lt;/code&gt;
&lt;/pre&gt;
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	</description>
    </item>
    <item>
      <title>Contributing to Open Source</title>
      <link>http://jbake.org/blog/2015/Open-source-contribution.html</link>
      <pubDate>Wed, 15 Apr 2015 00:00:00 +0530</pubDate>
      <guid isPermaLink="false">blog/2015/Open-source-contribution.html</guid>
      	<description>
	How does one contribute to open source? Contribution is an overloaded term and may 
mean a code fix, documentation changes, reporting a bug/issue, code review and comments 
&lt;!--more--&gt;
&lt;ol&gt;
    &lt;li&gt;There are multiple projects online on &lt;a href=&quot;https://github.com/&quot;&gt;github&lt;/a&gt; and &lt;a href=&quot;https://bitbucket.org&quot;&gt;  bitbucket&lt;/a&gt;&lt;/li&gt;
    &lt;li&gt;Choose One. Finding choosing difficult? goto 4. If you don&apos;t like any, goto 3&lt;/li&gt;
    &lt;li&gt;Create a new repository assuming you have a brilliant/dumb idea. Blog about it &amp; let friends know.&lt;/li&gt;
    &lt;li&gt;Join a User Group. Mingle to find projects people are working on. Chances are less that you are in Hyderabad but in case if you are join us &lt;a&gt;http://jughyderabad.in/&lt;/a&gt;&lt;/li&gt;
    &lt;li&gt;Fork the repository of your liking. Liking is a overloaded term. It may signify language, interest, philosophy ...&lt;/li&gt;
    &lt;li&gt;Check the issue list of the project you liked/forked. If you don&apos;t understand anything goto 7 else goto 8&lt;/li&gt;
    &lt;li&gt;Subscribe to project mailing list or ask questions on IRC channel of the project&lt;/li&gt;
    &lt;li&gt;Request that the issue be assigned to you&lt;/li&gt;
    &lt;li&gt;Read the Readme and How to contribute section in the repository. You may need to understand Gerrit/Jira. Read!&lt;/li&gt; 
    &lt;li&gt;Fix the issue in your forked branch &lt;/li&gt;
    &lt;li&gt;Run the tests for that project. See if all pass! this is important. If there no tests, create. &lt;/li&gt;
    &lt;li&gt;Create a pull request to sumbit your patch&lt;/li&gt;
    &lt;li&gt;Party if your pull request gets accepted. If not go back to 6 or 1 based on your motivation levels&lt;/li&gt;
&lt;/ol&gt;

    
Every open source project is in different stages of development. A mature project with thousands of developers will take weeks if not months for your code to be reviewed and incorporated. Be patient. 
A beginner project will almost instantaneously accept your pull request. This gain may not be true for dormant projects. 
You can be part of both as you can learn good coding practices in a mature project and apply them to your pet project or any open source project you would like to be associated with.
Most important have fun.Good luck. 
&lt;p&gt;&amp;nbsp&lt;/p&gt;
&lt;p&gt;Choose &lt;a href=&quot;https://github.com/rohitvvv/GitFx&quot;&gt;GitFx&lt;/a&gt; if you want to work on JavaFX&lt;/p&gt;
&lt;p align=&apos;right&apos;&gt;--Rohit Vaidya&lt;/p&gt;
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    </item>
    <item>
      <title>Invalid Signature file digest - Maven solution</title>
      <link>http://jbake.org/blog/2015/Invalid-Singature.html</link>
      <pubDate>Tue, 24 Mar 2015 00:00:00 +0530</pubDate>
      <guid isPermaLink="false">blog/2015/Invalid-Singature.html</guid>
      	<description>
	Are you getting this exception ?
&lt;pre class=&quot;prettyprint&quot;&gt;
&lt;code&gt;
Error: A JNI error has occurred, please check your installation and try again
Exception in thread &quot;main&quot; java.lang.SecurityException: Invalid signature file digest for Manifest main attributes
	at sun.security.util.SignatureFileVerifier.processImpl(SignatureFileVerifier.java:284)
	at sun.security.util.SignatureFileVerifier.process(SignatureFileVerifier.java:238)
	at java.util.jar.JarVerifier.processEntry(JarVerifier.java:273)
	at java.util.jar.JarVerifier.update(JarVerifier.java:228)
	at java.util.jar.JarFile.initializeVerifier(JarFile.java:383)
&lt;/code&gt;
&lt;/pre&gt;
&lt;!--more--&gt;
&lt;p&gt;If you a mere mortal like I am and have got this SecurityException after adding a maven repository read on. 
    The most basic cause of such a exception is some dependency define in pom.xml is pulling in jars which are singed. After building your application unzip the final jar that gets created for your application. 
&lt;p&gt;
    In my case its GitFx-1.0-SNAPSHOT.jar. Unzip GitFx-1.0-SNAPSHOT.jar or
    do a jar -xvf GitFx-1.0-SNAPSHOT.jar. Inspect the META_INF folder. 
    You will find &lt;b&gt;.RSA,.SF or .DSA&lt;/b&gt; present under META_INF. This is signed information. The best way to explain why one gets the exception at runtime is “Some of your dependencies are likely signed jarfiles. When you combine them all into one big jarfile, the corresponding signatures are no longer valid so the runtime halts.”  - StackOverflow Answer[1] 
&lt;/p&gt;
Solution to fix this with &lt;b&gt;maven-dependency-plugin&lt;/b&gt;. Small snippet of code in my pom.xml. 

&lt;pre class=&quot;prettyprint linenums lang-xml&quot;&gt;&lt;span style=&quot;color:#ee3030;&quot;&gt;&lt;/span&gt;
&amp;lt;plugin&amp;gt;
    &amp;lt;groupId&amp;gt;org.apache.maven.plugins&amp;lt;/groupId&amp;gt;
    &amp;lt;artifactId&amp;gt;maven-dependency-plugin&amp;lt;/artifactId&amp;gt;
    &amp;lt;version&amp;gt;2.6&amp;lt;/version&amp;gt;
    &amp;lt;executions&amp;gt;
        &amp;lt;execution&amp;gt;
            &amp;lt;id&amp;gt;unpack-dependencies&amp;lt;/id&amp;gt;
            &amp;lt;phase&amp;gt;package&amp;lt;/phase&amp;gt;
            &amp;lt;goals&amp;gt;
                &amp;lt;goal&amp;gt;unpack-dependencies&amp;lt;/goal&amp;gt;
            &amp;lt;/goals&amp;gt;
            &amp;lt;configuration&amp;gt;
                &amp;lt;excludeScope&amp;gt;system&amp;lt;/excludeScope&amp;gt;
                &amp;lt;excludes&amp;gt;META-INF/*.SF&amp;lt;/excludes&amp;gt;
                &amp;lt;excludes&amp;gt;META-INF/*.DSA&amp;lt;/excludes&amp;gt;
                &amp;lt;excludes&amp;gt;META-INF/*.RSA&amp;lt;/excludes&amp;gt;
                &amp;lt;excludeGroupIds&amp;gt;junit,org.mockito,org.hamcrest&amp;lt;/excludeGroupIds&amp;gt;
                &amp;lt;outputDirectory&amp;gt;${project.build.directory}/classes&amp;lt;/outputDirectory&amp;gt;
            &amp;lt;/configuration&amp;gt;
        &amp;lt;/execution&amp;gt;
    &amp;lt;/executions&amp;gt;
&amp;lt;/plugin&amp;gt;

&lt;/pre&gt;
Line # 15,16 and 17 is where we prevent the signed information from going into our final consolidated jar file. 
&lt;P&gt;Some more information about the plugins configuration can be found  
    &lt;a href=&quot;https://maven.apache.org/plugins/maven-dependency-plugin/examples/unpacking-artifacts.html&quot;&gt;here[2]&lt;/a&gt;
&lt;/P&gt;
Hope this helps :) 
&lt;P&gt;
    &lt;b&gt; References:&lt;/b&gt;
&lt;ol&gt;
    &lt;li&gt;&lt;a href=&quot;http://stackoverflow.com/questions/999489/invalid-signature-file-when-attempting-to-run-a-jar&quot;&gt;Stack OverFlow&lt;/a&gt;&lt;/li&gt;
    &lt;li&gt;&lt;a href=&quot;https://maven.apache.org/plugins/maven-dependency-plugin/examples/unpacking-artifacts.html&quot;&gt;Apache Maven - Unpacking Specific Artifacts&lt;/a&gt;&lt;/li&gt;
&lt;/ol&gt;

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	</description>
    </item>
    <item>
      <title>JavaFX Introduction</title>
      <link>http://jbake.org/blog/2015/JavaFX-Introduction.html</link>
      <pubDate>Sun, 15 Mar 2015 00:00:00 +0530</pubDate>
      <guid isPermaLink="false">blog/2015/JavaFX-Introduction.html</guid>
      	<description>
	
&lt;p&gt;&lt;b&gt;JavaFX&lt;/b&gt; is a software platform for creating Rich Internet Applications that can run across variety of platforms[1].It
has a collection of Java Packages with ability to add fancy GUI to your Java application. 
JavaFX is official standard part of Java platform. JavaFX is considered as a successor of Swing
and can be easily understood by a Swing developer. You can get the latest in JavaFX in early access preview 
of JavaFX in &lt;a href=&quot;https://jdk8.java.net/download.html&quot;&gt;Java 8 EA 40&lt;/a&gt;&lt;/p&gt;
&lt;!--more--&gt;&lt;p&gt;&lt;b&gt;History:&lt;/b&gt; Formerly it was called in F3(Form Follows function) and developed by Oliver Smith at Sun 
    Microsystems. JavaFX was initially developed as a scripting language however it was later 
    discontinued by Oracle and declared dead in Java One 2010. Now JavaFX has a clean Java API. 

&lt;p&gt;
    &lt;b&gt;JavaFX Lingo&lt;/b&gt;
In order to understand JavaFX well one needs to familiarize with the Jargon used
&lt;ul&gt;
    &lt;li&gt;Stage - Top level container for all Java Objects&lt;/li&gt;
    &lt;li&gt;Scene - A scene is a hierarchical node structure that contains all scenes components&lt;/li&gt;
    &lt;li&gt;Group - Group is a general purpose container node&lt;/li&gt;
&lt;/ul&gt;
&lt;/p&gt;
&lt;p&gt;&lt;b&gt;Stage:&lt;/b&gt; Stage is implicitly created by JavaFX. JavaFX makes you think like a designer and 
stage is where you will host your scene&lt;/p&gt;
&lt;p&gt;&lt;b&gt;Scene:&lt;/b&gt;A scene is a hierarchical node structures that contains all scene’s components&lt;/p&gt;
&lt;p&gt;&lt;b&gt;Group:&lt;/b&gt;Group is general purpose container node. This is analogous to a layout creates&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Various possibilities with JavaFX&lt;/b&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;CSS Support&lt;/li&gt;
&lt;li&gt;Visual Effects: Shadow,reflect,blur perspective&lt;/li&gt;
&lt;li&gt;Animation- rotate,scale,translate etc&lt;/li&gt;
&lt;li&gt;Chars&lt;/li&gt;
&lt;li&gt;3D Object - cubes,cylinder,spheres etc&lt;/li&gt;
&lt;li&gt;Touch Interface&lt;/li&gt;
&lt;li&gt;Property bindings&lt;/li&gt;
&lt;/ul&gt;

&lt;b&gt;JavaFX Application Life Cycle&lt;/b&gt;
&lt;ol&gt;
    &lt;li&gt;init (): Default implementation of init does nothing. 
        One can override to perform any processing before application UI is displayed&lt;/li&gt;
&lt;li&gt;start (): No default implementation and is declared abstract. 
    Your app must override this. Build and display the UI&lt;/li&gt;
&lt;li&gt;Wait for application to End. Typically happens when user signals end of program&lt;/li&gt;
&lt;li&gt;stop(): Default implementation does not do anything
    One can override to to perform any necessary processing as program terminates&lt;/li&gt; 
&lt;ul&gt;

&lt;pre class=&quot;prettyprint&quot;&gt;
&lt;code&gt;

package sampleapplication;

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

/**
 *
 * @author rvvaidya
 */
public class SampleApplication extends Application {
    
    @Override
    public void start(Stage primaryStage) {
        Button btn = new Button();
        btn.setText(&quot;Say &apos;Hello World&apos;&quot;);
        btn.setOnAction(new EventHandler&lt;ActionEvent&gt;() {
            
            @Override
            public void handle(ActionEvent event) {
                System.out.println(&quot;Hello World!&quot;);
            }
        });
        
        StackPane root = new StackPane();
        root.getChildren().add(btn);
        
        Scene scene = new Scene(root, 300, 250);
        
        primaryStage.setTitle(&quot;Hello World!&quot;);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        launch(args);
    }
    
}

&lt;/code&gt;

&lt;/pre&gt;
    &lt;P&gt;&lt;b&gt;Code Walk through&lt;/b&gt;
    &lt;ul&gt;
        &lt;li&gt;Any JavaFX application must extend javafx.application.Application&lt;/li&gt;
    &lt;li&gt;The start method is overriden. The override also passes the Stage object&lt;/li&gt;   
    &lt;li&gt;Button object is instantiated and event handler is associated&lt;/li&gt;
    &lt;li&gt;A stack pane is created. This is a layout and corresponds to the group&lt;/li&gt;
    &lt;li&gt;Create the Scene object and pass the group reference &lt;/li&gt;
    &lt;li&gt;The scene is hosted on the stage&lt;/li&gt;
    &lt;li&gt;In main (the main entry point for java application) launch is called. This launches
        the JavaFX application.&lt;/li&gt;&lt;/ul&gt; 
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	</description>
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