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A loop-switch sequence [1] (also known as the for-case paradigm [2] or Anti-Duff's Device) is a programming antipattern where a clear set of steps is implemented as a switch-within-a-loop. The loop-switch sequence is a specific derivative of spaghetti code. It is not necessarily an antipattern to use a switch statement within a loop—it is ...
The loop calls the Iterator::next method on the iterator before executing the loop body. If Iterator::next returns Some(_), the value inside is assigned to the pattern and the loop body is executed; if it returns None, the loop is terminated.
For Programmable Array Logic (PAL) devices PipelineC: C-like hardware description language adding High-level synthesis-like automatic pipelining as a language construct and compiler feature. PyMTL 3 (Mamba) Python: Based on Python, from Cornell University PyRTL: Python: Based on Python, from University of California, Santa Barbara
In Fortran, a computed GOTO jumps to one of several labels in a list, based on the value of an expression. An example is goto (20,30,40) i. [44] The equivalent construct in C is the switch statement, and in newer Fortran a SELECT CASE construct is the recommended syntactical alternative. [45]
In the above case, the reduce or slash operator moderates the multiply function. The expression ×/2 3 4 evaluates to a scalar (1 element only) result through reducing an array by multiplication. The above case is simplified, imagine multiplying (adding, subtracting or dividing) more than just a few numbers together.
Folds can be regarded as consistently replacing the structural components of a data structure with functions and values. Lists, for example, are built up in many functional languages from two primitives: any list is either an empty list, commonly called nil ([]), or is constructed by prefixing an element in front of another list, creating what is called a cons node ( Cons(X1,Cons(X2,Cons ...
A multimap generalizes an associative array by allowing multiple values to be associated with a single key. [9] A bidirectional map is a related abstract data type in which the mappings operate in both directions: each value must be associated with a unique key, and a second lookup operation takes a value as an argument and looks up the key ...
Self-modifying code, in this case, would simply be a matter of rewriting the loop like this: repeat N times { increase A by one do something with A when STATE has to switch { replace the opcode "increase" above with the opcode to decrease, or vice versa } }