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Android Actionbar Drop Down navigation

ActionBar supports different navigation types within activities. We saw in an older post that we can use Tabs to navigate or we can use Drop Down Navigation. In this post we will ...
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Getting Started With Spring’s MVC Test Framework – Part 2

The first blog in this mini-series introduced the Spring MVC Test Framework and demonstrated its use in unit testing Spring MVC Controller classes as controllers rather then as POJOs. ...
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JPA 2 | Fetch Joins and whether we should use them

Introduction Recently I have been working with FETCH JOINS in JPA 2 to fetch the data eagerly from the Database and I learned quite a lot on why we should avoid using Fetch Joins in ...
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Java Garbage Collection Distilled

Serial, Parallel, Concurrent, CMS, G1, Young Gen, New Gen, Old Gen, Perm Gen, Eden, Tenured, Survivor Spaces, Safepoints, and the hundreds of JVM startup flags. Does this all baffle ...
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Enhanced Groovy-based JAR/Manifest Diff Tool

This brief blog post provides another Groovy script that provides simple differencing of two JAR (or WAR or EAR) files and their MANIFEST.MF files. It represents a combination of the ...
spring-interview-questions-answers

Spring @Bean and PropertyPlaceHolderConfigurer

I was recently stumped by what I thought was going to be a fairly straightforward implementation – Consider the following Spring Java based bean definition file ( @Configuration):                 package ...
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Fake system clock pattern in Scala with implicit parameters

Fake system clock is a design pattern addressing testability issues of programs heavily relying on system time. If business logic flow depends on current system time, testing various ...
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MongoDB Pro Tip: Field Projections

Did you ever learn that select * from table in RDBMS-land is bad? Of course, you did! If you’re only looking for the email address of a user and not the other 15 columns worth of ...
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MongoDB Geo-Spatial Mobile Demo

Mongo: noun (pl mongo or mongos) – a monetary unit of Mongolia. Equal to one hundredth of a tugrik. Origin from Mongolian “silver” I’ve written about NoSQL DBMS [http://keyholesoftware.com/2012/10/01/is-nosql-the-sql-sequel/]. ...
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Java’s Reflection API

If you have ever asked yourself questions like these: – “How do I invoke a method, having only it’s name in a String?” – “How do I list all the attributes in a class ...
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