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An undefined variable in the source code of a computer program is a variable that is accessed in the code but has not been declared by that code. [1] In some programming languages, an implicit declaration is provided the first time such a variable is encountered at compile time. In other languages such a usage is considered to be sufficiently ...
In C the use of any automatic variable before it has been initialized yields undefined behavior, as does integer division by zero, signed integer overflow, indexing an array outside of its defined bounds (see buffer overflow), or null pointer dereferencing. In general, any instance of undefined behavior leaves the abstract execution machine in ...
Mach-O, short for Mach object file format, is a file format for executables, object code, shared libraries, dynamically loaded code, and core dumps.It was developed to replace the a.out format.
User-defined functions should not be confused with stored procedures. Stored procedures allow the user to group a set of SQL commands. A procedure can accept parameters and execute its SQL statements depending on those parameters. A procedure is not an expression and, thus, cannot be used like user-defined functions.
The purpose of a system is what it does (POSIWID) is a systems thinking heuristic coined by Stafford Beer, [1] who observed that there is "no point in claiming that the purpose of a system is to do what it constantly fails to do."
To be scientific about it, imagine 100 real world users. They are not necessarily familiar with computers. They have many diverse talents, but some of them distinctly do not have talents in the computer area. Some of them are being distracted while they try to use your program. The phone is ringing. The baby is crying.
not publicly retreating from the initial, falsified a posteriori assertion; offering a modified assertion that definitionally excludes a targeted unwanted counterexample; using rhetoric to signal the modification; An appeal to purity is commonly associated with protecting a preferred group.