Minimum Edit Distance

This blog post is primarily focused on strengthening the concept of Dynamic Programming by using Minimum Edit Distance problem. Although you won't require any knowledge of Dynamic Programming to understand this post. However, if you are also looking for an elaborate explanation of Dynamic Programming, then please visit this post . What is Minimum Edit Distance ? Given two strings P and Q, it is possible to transform P into Q or vice-versa by performing the following operations on one of the strings. For e.g let us assume that we need to transform the string P into the string Q. Then, the fol...
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Java 8 Date Time API Usage

Introduction Every effort we put in to showcase the extent of Java 8 Date Time API usage leaves us only scratching the surface of it. This post walks through a couple of examples and some standard methods that can be helpful in daily use. Timezone aspects are not covered in this post. Refer to this post to for an introduction to Java 8 Date Time API. Old And The New Let us see how date formatting code changes with the new Java 8 Date Time API. If you landed directly on this post, we recommend reading this introductory post first. [crayon-5ba5689b16939595210683/] Goodbye ThreadLocals and c...
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Java 8 Date Time API

What ailed Date and Time handling in Java? The existing java.util.Date and SimpleDateFormat are mutable and not thread-safe, more often than not, leading to concurrency issues for users. Having to deal with this overhead is not welcoming for novice developers. Inconsistent API (months starting at 1 while days start at 0), no ability to handle Time alone, no utilities like plus/minus dates lead to popularity of libraries like joda-time. Many enterprise products use joda-time, when date/time usage and manipulation should have been provided by the language which was in it's 7th iteration (person...
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Try With Resources in Java 7 and Above

Introduction Try with Resources in Java 7 and above allows for automatic closing of resources that implement java.lang.AutoCloseable or the more familiar java.io.Closeable (which extends AutoCloseable) Anyone through a basic Java course will be familiar with this block of code. Open a text file to write data and close it when done. [crayon-5ba5689b180d5020892074/] The method attempts to write to a file and throws any exception that hinders in achieving this. The finally block ensures that no file handle is left open by this method. But close() can throw an exception if closing the file f...
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Injecting Prototype Beans in Singletons

Introduction This is a series and it would make a lot of sense if read in a sequence. You can find all the posts under the heading "Spring Beginners to Professionals". In the previous posts,we talked about scopes of Spring beans. Now as there are many different scopes, the basic problem which arises is injecting prototype beans in singletons. We can also define this problem in a more general way, say collaboration between beans of different scopes. Injecting Prototype Beans in Singletons By now we have learnt that the dependency injection happens when the container starts. All the singleton...
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