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Aikesheng Open Source Community

Sep 23, 2024 · Databases

Misuse of Wildcards in MySQL GRANT Statements Leads to Permission Errors and How to Avoid Them

This article explains how using the '_' and '%' wildcards in MySQL GRANT statements can unintentionally broaden privileges, illustrates the security risks with concrete examples and version‑specific behavior, and provides practical guidance on escaping wildcards, auditing existing grants, and preventing privilege loss.

DatabaseMySQLPermissions

0 likes · 14 min read

Misuse of Wildcards in MySQL GRANT Statements Leads to Permission Errors and How to Avoid Them

Java Captain

Jul 4, 2018 · Fundamentals

Understanding Java Generics: Type Erasure, Wildcards, and Common Pitfalls

This article explains Java generics as a type‑parameter mechanism that provides compile‑time safety, describes type erasure, generic classes, methods, interfaces, the three kinds of wildcards, reflection tricks that bypass erasure, and the practical limitations of generics.

JavaType Erasuregenerics

0 likes · 17 min read

Understanding Java Generics: Type Erasure, Wildcards, and Common Pitfalls

Java Captain

Nov 15, 2017 · Fundamentals

Understanding Java Generics: Basics, Wildcards, Bounds, and Type Erasure

This article introduces Java generics, covering generic classes and methods, wildcard usage with the PECS principle, bounded type parameters, and the implications of type erasure, illustrating each concept with code examples and discussing common pitfalls such as generic arrays, bridge methods, and runtime type checks.

JavaPECSType Erasure

0 likes · 17 min read

Understanding Java Generics: Basics, Wildcards, Bounds, and Type Erasure

Java Captain

Aug 22, 2017 · Fundamentals

Understanding Java Generics: Classes, Methods, Wildcards, Bounds, and Type Erasure

This article provides a comprehensive introduction to Java generics, explaining generic classes and methods, the use of wildcards and bounds, the PECS principle, type erasure, and common pitfalls such as generic array creation, bridge methods, and runtime type checks.

BoundsJavaType Erasure

0 likes · 17 min read

Understanding Java Generics: Classes, Methods, Wildcards, Bounds, and Type Erasure

360 Zhihui Cloud Developer

Dec 13, 2016 · Fundamentals

Master Shell Wildcards and POSIX Regex: A Practical Guide

This article explains the meaning of common special characters used as shell wildcards, character classes, and POSIX regular expressions, demonstrates locale effects on pattern matching, and compares BRE and ERE syntax with practical examples and exercises.

POSIX regexcharacter classeslocale

0 likes · 7 min read

Master Shell Wildcards and POSIX Regex: A Practical Guide