Call

Batch Script Functions with CALL

Learn how to simulate reusable functions in Windows Batch using labeled subroutines invoked with CALL, including parameter passing and local variable scope.

Calling PowerShell from Batch

Learn how to invoke PowerShell commands and scripts from a batch file, pass parameters, capture output, and manage execution policy and security implications.

Recursion in Pascal

Learn how Pascal functions and procedures can call themselves, and how to design correct base cases and recursive cases.

Subprograms and CALL Statements

Learn how COBOL programs invoke reusable subprograms with the CALL statement, pass parameters via the LINKAGE SECTION, and choose between static and dynamic li…

Procedures and Calling Conventions

Learn how assembly functions are called, how arguments and return values are passed, and how the stack frame is built and torn down.

System Calls Explained

How assembly programs ask the operating system kernel to perform privileged work like reading files, allocating memory, and exiting a process.

JavaScript Event Loop Cheat Sheet

Covers the call stack, the task and microtask queues, and how the event loop orders callbacks from Promises, setTimeout, and other async APIs.