How Does Modulus Divison Work
The result of a modulo division is the remainder of an integer division of the given numbers. That means: Other examples:
language-agnostic
What is an “internal error” and how do I fix it?
I am using a programming tool (a compiler or IDE or other tool) and it reports an “internal error” with some incomprehensible details when I use it. I want to fix this error. What should I do?
What is stability in sorting algorithms and why is it important?
A sorting algorithm is said to be stable if two objects with equal keys appear in the same order in sorted output as they appear in the input array to be sorted. Some sorting algorithms are stable by nature like Insertion sort, Merge Sort, Bubble Sort, etc. And some sorting algorithms are not, like Heap Sort, Quick … Read more
What is the difference between concurrency and parallelism?
Concurrency is when two or more tasks can start, run, and complete in overlapping time periods. It doesn’t necessarily mean they’ll ever both be running at the same instant. For example, multitasking on a single-core machine. Parallelism is when tasks literally run at the same time, e.g., on a multicore processor. Quoting Sun’s Multithreaded Programming Guide: Concurrency: A condition that exists when at least two … Read more
Calculating a 2D Vector’s Cross Product
Implementation 1 returns the magnitude of the vector that would result from a regular 3D cross product of the input vectors, taking their Z values implicitly as 0 (i.e. treating the 2D space as a plane in the 3D space). The 3D cross product will be perpendicular to that plane, and thus have 0 X … Read more
What is the meaning of the term “thread-safe”?
Thread-safe code is code that will work even if many Threads are executing it simultaneously. http://mindprod.com/jgloss/threadsafe.html
What is the difference between a deep copy and a shallow copy?
Shallow copies duplicate as little as possible. A shallow copy of a collection is a copy of the collection structure, not the elements. With a shallow copy, two collections now share the individual elements. Deep copies duplicate everything. A deep copy of a collection is two collections with all of the elements in the original … Read more
What are bitwise shift (bit-shift) operators and how do they work?
The bit shifting operators do exactly what their name implies. They shift bits. Here’s a brief (or not-so-brief) introduction to the different shift operators. The Operators >> is the arithmetic (or signed) right shift operator. >>> is the logical (or unsigned) right shift operator. << is the left shift operator, and meets the needs of … Read more
What’s the difference between a method and a function?
A function is a piece of code that is called by name. It can be passed data to operate on (i.e. the parameters) and can optionally return data (the return value). All data that is passed to a function is explicitly passed. A method is a piece of code that is called by a name that is associated with … Read more
“Parameter” vs “Argument”
A parameter is the variable which is part of the method’s signature (method declaration). An argument is an expression used when calling the method. Consider the following code: Here i and f are the parameters, and anInt and 2.0 are the arguments.