Anargam An anagram is a word or phrase formed by rearranging the letters of a different word or phrase, typically using all the original letters exactly once. For example, “Listen” = “Silent”, “evil” = “vile”, “restful” = “fluster”
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Return the length longest word from a string
Return the length longest word from a string using javascript Read More »
A palindrome is a word, number, phrase, or other sequence of characters which reads the same backward as forward, such as madam or racecar. Return True if it”s a palindrome and False if not palindrome
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Reverse a string using javascript
Reverse a string using javascript Read More »
Left rotate array using javascript Rotate array by d digits using javascript Method 1 using shift() and push() Method 2 using ES6 Spread Operator and Slice() – one liner
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Flatten a multidimensional associative array using javascript
Flatten a multidimensional associative array into one-dimensional array using javascript Read More »
Chain-of-responsibility pattern The chain-of-responsibility pattern is a behavioral design pattern consisting of a source of command objects and a series of processing objects. Each processing object contains logic that defines the types of command objects that it can handle; the rest are passed to the next processing object in the chain. A mechanism also exists
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Observer pattern The observer pattern is a software design pattern in which an object, named the subject, maintains a list of its dependents, called observers, and notifies them automatically of any state changes, usually by calling one of their methods. It is mainly used for implementing distributed event handling systems, in “event driven” software. In
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Strategy pattern The strategy pattern (also known as the policy pattern) is a behavioral software design pattern that enables selecting an algorithm at runtime. Instead of implementing a single algorithm directly, code receives run-time instructions as to which in a family of algorithms to use. Strategy lets the algorithm vary independently from clients that use
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Template method pattern The template method is a method in a superclass, usually an abstract superclass, and defines the skeleton of an operation in terms of a number of high-level steps. These steps are themselves implemented by additional helper methods in the same class as the template method. The helper methods may be either abstract
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