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Invalid Variable Names Code Samples

Sample code files demonstrating invalid variable naming conventions across different programming languages

Samples

Entries inside this sample collection

FilejavascriptIntermediate

JavaScript Invalid Variable Names

JavaScript code demonstrating invalid variable names including numbers at start, special characters, and reserved keywords

Difficulty

3/10

Estimated time

2 min

Tags

javascript, invalid-names, reserved-keywords, special-characters, syntax-errors

javascript-invalid.js

JS · 2.2 KB

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fileSize: 2.2 KB
lineCount: 52
characterCount: 2244
errorTypes: ["Starts with number","Contains special characters","Reserved keywords","Empty names"]

FilepythonIntermediate

Python Invalid Variable Names

Python code demonstrating invalid variable names including numbers at start, special characters, and Python keywords

Difficulty

3/10

Estimated time

2 min

Tags

python, invalid-names, keywords, special-characters, syntax-errors

python-invalid.py

PY · 1.8 KB

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fileSize: 1.8 KB
lineCount: 50
characterCount: 1836
errorTypes: ["Starts with number","Contains special characters","Python keywords","Magic methods"]

FilejavaIntermediate

Java Invalid Variable Names

Java code demonstrating invalid variable names including numbers at start, special characters, and Java keywords

Difficulty

3/10

Estimated time

2 min

Tags

java, invalid-names, keywords, literals, syntax-errors

java-invalid.java

JAVA · 1.5 KB

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fileSize: 1.5 KB
lineCount: 45
characterCount: 1536
errorTypes: ["Starts with number","Contains special characters","Java keywords","Literals"]

FiletypescriptComplex

Mixed Style Naming Mistakes

TypeScript code showing common naming mistakes including mixed camelCase and snake_case, inconsistent capitalization, and meaningless abbreviations

Difficulty

4/10

Estimated time

3 min

Tags

typescript, naming-mistakes, inconsistent-style, bad-practices, code-smell

mixed-style-mistakes.ts

TS · 3.2 KB

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fileSize: 3.2 KB
lineCount: 95
characterCount: 3268
errorTypes: ["Mixed conventions","Inconsistent capitalization","Meaningless abbreviations","Poor naming"]

FilejavascriptComplex

Real World Refactoring Cases

JavaScript code with real-world refactoring examples showing beginner mistakes, naming issues, and before/after comparisons

Difficulty

5/10

Estimated time

5 min

Tags

javascript, refactoring, best-practices, code-improvement, before-after

real-world-refactoring-cases.js

JS · 5.8 KB

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fileSize: 5.8 KB
lineCount: 185
characterCount: 5920
errorTypes: ["Poor naming","Lack of clarity","Abbreviations","Real scenarios"]

Tools

Invalid Variable Names Code Samples

Entries inside this sample collection

JavaScript Invalid Variable Names

Python Invalid Variable Names

Java Invalid Variable Names

Mixed Style Naming Mistakes

Real World Refactoring Cases

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