@rkenmi - Search Results

A guide to const in C++

The Many Uses of const with Operator Overloading const can be used in different ways depending on how an operator is overloaded. There are two major cases to consider: If an operator is overloaded as a nonmember function (not part of the class definition) If an operator is overloaded as a member function (part of the class definition) Case 1: Overloaded as a Nonmember Function Here is an example of the + operator overloaded as a nonmember function: const Weight operator +(const Weight& w1, const Weight& w2); Notice we have three positions where we can place const and each one means something different.

January 24, 2015

How to convert a PPM image to grayscale in C++

... img); friend std::ostream& operator <<(std::ofstream& outputStream, const PPMImage& img); void grayscale(); // feel free to add more if you want! private: string magicNumber; // A "magic number" for identifying the file type int width; // Width of the image int height; // Height of the image int maxColorVal; // Maximum color value char *threeChan; // A series of rows and columns (raster) that stores important binary image data }; string magicNumber - For simplicity of this guide, we'll let this be "P6".

March 24, 2015

Javascript Essentials

... let is primarily used for block-level variable declaration, for performance and cleanliness. const is also similar, in that it is not hoisted like var, and is used as a read-only variable similar to const in other programming languages.

November 12, 2017

Javascript Concepts

... added new properties to Array.prototype, they would also be iterated over by this loop. Use for (const x of A) or forEach() instead this A special keyword that refers to the current object, but this is specified by the way you called that function (Remember, you can only call this in a function).

October 29, 2017

A primer on MapReduce

... merge them together. For example, if I want to add a total of a list of numbers in Javascript: const INITIAL_TOTAL = 0 [0, 1, 2, 3].reduce((sum, number) => sum + number, INITIAL_TOTAL); Distributed Processing What's the point? Distributed processing is the idea of doing some work (i.

July 11, 2020