# Hello World

# Singleton Pattern

Overview
The singleton pattern is a software design pattern that restricts the instantiation of a class to one single instance.
This is useful when exactly one object is needed to coordinate actions across the system.

# Consistent Hashing

What is the Consistent Hashing?
Consistent hashing is a special kind of hashing such that when a hash table is resized, only K/n keys need to be remapped on average, where K is the number of keys, and n is the number of slots.
In contrast, in most traditional hash tables, a change in the number of array slots causes nearly all keys to be remapped because the mapping between the keys and the slots is defined by a modular operation.

# Weighted Random Collection

Overview
Letâ€™s see how to make weighted random collection.

# Sprig Redis Json Example

Overview
This is simple example of Spring-Boot-Redis.

# Download excel file using AngularJS

Overview
How to download excel file using Angular-JS