Error

Error Handling in Batch

Learn how Windows Batch scripts detect and respond to failures using ERRORLEVEL, exit codes, and a centralized GOTO :error pattern.

Error Handling with IfError

IfError lets a Power Fx formula catch a runtime error and substitute a fallback value instead of letting the error propagate and break the app's UI.

Retries and Error Handling

Configuring per-task retries, retry delays, callbacks, and trigger rules so Airflow DAGs recover gracefully from transient failures.

Error Handling with Try/Catch

Understand PowerShell's terminating vs non-terminating errors and how try/catch/finally, -ErrorAction, and $ErrorActionPreference work together to handle failu…

Error Handling and Retries

How to build try/catch-style error handling with Configure run after, retry policies, Scopes, and Terminate.

Error Handling with TRY/CATCH

Learn how TRY...CATCH blocks intercept T-SQL runtime errors, how to inspect them with the ERROR_ functions, and how to combine them safely with transactions.

Error Handling in Fortran

Learn Fortran's status-code-based approach to error handling, covering I/O error checking, allocation failures, and structured patterns for building robust pro…

Error Handling in Socket.IO

Learn the distinct categories of Socket.IO errors — connection errors, disconnect reasons, and acknowledgement failures — and how to handle each robustly.

Error Handling with require, revert, assert

Solidity handles errors by reverting state changes. Learn when to use require for input validation, revert with custom errors for gas-efficient failures, and a…

Error Handling with On Error

Intercept run-time errors gracefully in VBA using On Error statements, the Err object, and disciplined cleanup patterns.

Error Logging and Robust Macros

Build VBA macros that fail gracefully by combining structured On Error handling, a central error handler, the Err object, and persistent logging to a file or w…

Error Handling with Try/Catch

Learn structured exception handling in VB.NET using Try, Catch, Finally, and Throw to write robust code that gracefully handles runtime errors.

Error Handling with catch and try

How Tcl scripts detect, inspect, and recover from runtime errors using the catch command and the more structured try/on/finally syntax.

Error Handling and Conditions

How Common Lisp's condition system goes beyond try/catch, letting programs signal, inspect, and interactively recover from errors using restarts.

Error Handling with NSError

The conventions and patterns Objective-C uses for reporting recoverable errors via NSError, as distinct from exceptions for programmer errors.

Error Handling in D

Learn D's split between recoverable Exceptions and unrecoverable Errors, the scope(exit)/failure/success guards, and std.exception helpers like enforce and not…

Error Handling in Lua (pcall/error)

Learn how Lua signals and catches errors using error(), pcall(), and xpcall(), instead of try/catch exceptions.

Error Handling in Groovy

How Groovy handles exceptions, including its unchecked-exceptions model, try/catch/finally, multi-catch, custom exceptions, and null-safe operators that reduce…

Error Handling in Erlang

Erlang handles failure through a distinctive combination of try/catch exception handling and the 'let it crash' philosophy, where supervisors, not defensive co…

Error Handling in Haskell

Learn how Haskell represents failure explicitly using Maybe, Either, and exceptions, and when to reach for each approach.

Error Handling with Try and Either

Scala models recoverable failure as ordinary values using Try and Either, letting you compose error-prone code with map, flatMap, and for-comprehensions instea…

Scala Best Practices

Idiomatic patterns for writing clean, maintainable, and performant Scala code, from immutability to error handling to project structure.

Error Handling in COBOL

Learn how COBOL programs detect and respond to runtime errors using FILE STATUS codes, the ON SIZE ERROR and ON OVERFLOW phrases, and structured exception hand…

Close Codes and Error Handling

What WebSocket close codes mean, how to choose the right one, and how to build robust reconnect and error-handling logic around them.

Express.js Cheat Sheet

Covers building routes, applying middleware, handling errors in async handlers, and key Express request/response methods.

Shell Scripting Deep Dive Cheat Sheet

Advanced Bash scripting patterns including parameter expansion, error handling, arrays, and safe scripting practices.