Data & Development

Python Data Analysis Reference Pandas Cheat Sheet Quickly find practical Pandas syntax for DataFrames, data cleaning, filtering, grouping, merging, reshaping, importing, and exporting data. View Quick Reference Browse All Sections Copy-ready Python Practical DataFrame examples Beginner to advanced Printable reference sales_analysis.py import pandas as pd df = pd.read_csv(“sales.csv”) summary = ( df.dropna(subset=[“Sales”]) .groupby(“Region”)[“Sales”] .sum() .sort_values(ascending=False) … Read more

CSS Layout Reference CSS Flexbox Cheat Sheet: Properties & Examples Quickly find Flexbox container and item properties, understand the main and cross axes, compare alignment values, and copy practical CSS for responsive one-dimensional layouts. Search the cheat sheet Browse all sections 18 focused sections Copyable CSS examples Interactive Flexbox playground Main axis 1 2 3 … Read more

Web Development Cheat Sheet HTML Cheat Sheet: Tags, Attributes & Examples Quickly find essential HTML elements, attributes, forms, tables, semantic structures, accessibility guidance, and copyable code examples based on the current HTML Living Standard. 20 structured sections Copyable examples Interactive HTML preview Accessibility guidance Search the cheat sheet Browse all sections <article> <h1> Build meaningful … Read more

Data & Development Cheat Sheet Linux Commands Cheat Sheet: Essential Commands & Examples A practical Linux command reference for navigating the terminal, managing files and permissions, finding text, monitoring processes, troubleshooting networks, installing packages, and administering everyday systems. Copyable commands Practical examples Distribution notes Safety warnings 20 structured sections Beginner to intermediate Ubuntu, Debian, Fedora, … Read more

Programming & Development Cheat Sheet Regex Cheat Sheet: Syntax, Examples & Common Patterns A practical regular expression reference covering character classes, anchors, quantifiers, groups, lookarounds, flags, common patterns, replacements, and important differences between regex engines. Copyable regex syntax Practical matching examples Interactive regex tester Flavor compatibility notes 16 structured sections Beginner to advanced JavaScript, Python, … Read more

Development Cheat Sheet Docker Cheat Sheet A practical reference for essential Docker commands, images, containers, Dockerfiles, volumes, networks, Compose workflows, debugging, and safe cleanup. Copy-ready commands Docker Compose workflows Cleanup guidance Practical troubleshooting 22 structured sections Beginner to intermediate Containers and Compose Find a command Search the Docker Cheat Sheet Search by command, task, resource … Read more

Development Cheat Sheet Git Cheat Sheet A practical reference for essential Git commands, branching, commits, merging, rebasing, remote repositories, undoing changes, and everyday development workflows. Copy-ready commands Practical workflows Safe undo guidance Beginner-friendly explanations 22 structured sections Beginner to intermediate Git and GitHub workflows Find a command Search the Git Cheat Sheet Search by command, … Read more

A comprehensive SQL Cheat Sheet featuring 12 production-ready relational database commands. Master essential SQL syntax, filtering queries, table joins, data manipulation, and aggregation rules with practical code examples.