The java.util.concurrent.TimeoutException is a checked exception in Java that is thrown when a blocking operation times out. Since java.util.concurrent.TimeoutException is a checked exception, it must be explicitly handled in methods which can throw this exception - either by using a try-catch block or by throwing it using the throws clause.
The PHP E_WARNING constant refers to run-time warnings. Warnings are non-fatal errors in PHP that do not halt script execution.
The C# “an object reference is required for the non-static field” error is thrown when an object reference is required for the nonstatic field, method or property.. Install the C# SDK to identify and fix these errors.
Migration in Rails is a tool that allows the developer to use Ruby to change an application's database schema. Instead of using SQL scripts, we use Ruby code, which is database independent, so it is easy to move the application to a completely new platform. We define these database changes in domain-specific language (DSL), and these migrations can be rolled back and managed along with the application source code.
A NameError is raised when a referenced variable or a constant, such as a module, a class, or a constant variable, isn't defined or is invalid. The Uninitialized Constant error is a variation of the NameError exception class and has several reasons to occur. When this error occurs, several class names appear in place of Something.
The PHP E_NOTICE constant refers to run-time notices. Notices indicate that the script encountered something that could indicate an error, but could also happen in the normal course of running a script.
