Author: Editorial Team
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Redis: Deleting Keys and Clearing Data
1. Introduction In the previous session, we learned how to retrieve all the keys stored in Redis. In this lecture, we’ll focus on another essential operation — deleting keys. Deleting keys is a simple but powerful operation. It allows you to remove unnecessary data, free up memory, or reset the database entirely when needed. Let’s…
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Redis: Creating and Managing Simple Key-Value Pairs
1. Introduction In this section, we’ll understand the most fundamental concept in Redis — storing and retrieving key-value pairs. At its core, Redis is a key-value data store, meaning that every piece of data you store in Redis is associated with a key that uniquely identifies it. This is similar to how variables in programming…
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Redis: Working with Simple Key-Value Pairs
1. Introduction In this lecture, we’ll explore the most fundamental concept in Redis — storing and retrieving key-value pairs.Redis is a key-value data store at its core, and everything you store in Redis is associated with a key that uniquely identifies the data. Redis supports several advanced data structures such as lists, sets, hashes, and…
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Redis Installation and Setup (with Docker)
1. Introduction In this lecture, we’ll learn how to install and set up Redis, understand what happens during installation, and how to interact with the Redis server using the Redis CLI.We’ll also look at how to run Redis inside a Docker container, which is a very common and convenient setup for developers. 2. Installing Redis…
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Redis: An Introduction
1. What is Redis? Redis (REmote DIctionary Server) is an open-source, in-memory data structure store used primarily as a database, cache, and message broker. It is designed for high performance, low latency, and real-time data processing. Redis stores data in memory instead of disk, which makes it extremely fast compared to traditional databases like MySQL…
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Longest Common Substring Coding Pattern
1. Introduction The Longest Common Substring (LCS) problem is a classic string problem in computer science. It involves finding the longest contiguous substring that appears in both strings. Example: Note: Problem Statement (Typical Coding Problem): Given two strings s1 and s2, find the length of the longest common substring. Optionally, return the substring itself. 2.…
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Palindromic Subsequence Coding Pattern
1. Introduction A palindromic subsequence is a sequence of characters in a string that: Example: Typical Problems: This pattern is a classic Dynamic Programming (DP) problem because the solution depends on substrings and overlapping subproblems. 2. When to Use Palindromic Subsequence Pattern Use this pattern when: Problem Indicators: 3. Core Idea For a string s[i..j],…
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Fibonacci Numbers Coding pattern
1. Introduction The Fibonacci sequence is a classic sequence where each number is the sum of the two preceding ones: Example sequence: Problem Statement (Basic Coding Problem): Given an integer n, compute F(n) – the n-th Fibonacci number. Fibonacci problems are fundamental because they teach recursion, dynamic programming, and optimization. 2. When to Use Fibonacci…
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0/1 Knapsack Coding Pattern
1. Introduction The 0/1 Knapsack problem is a classic Dynamic Programming (DP) problem used to teach decision-based optimization. Problem Statement: Given N items, each with a weight w[i] and a value v[i], and a knapsack with capacity W, select a subset of items to maximize the total value without exceeding the capacity.Each item can be…
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K-Way Merge Coding Pattern
1. Introduction The K-Way Merge pattern is a common coding technique used to merge K sorted arrays or lists into a single sorted array efficiently. Problem Statement: Given K sorted arrays, merge them into one sorted array. This pattern is widely used in: Example: 2. When to Use K-Way Merge Pattern Use this pattern when:…