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MapReduce is a programming model and an associated implementation for processing and generating big data sets with a parallel and distributed algorithm on a cluster. [1] [2] [3]A MapReduce program is composed of a map procedure, which performs filtering and sorting (such as sorting students by first name into queues, one queue for each name), and a reduce method, which performs a summary ...
obj.reduce(func, initial) obj.reduce(func) Where func receives as arguments the result of the previous operation (or the initial value on the first iteration); the current item; the current item's index or key; and a reference to the obj: Clojure (reduce func initval list) (reduce func initval (reverse list)) (reduce func list) (reduce func ...
Therefore, compilers will attempt to transform the first form into the second; this type of optimization is known as map fusion and is the functional analog of loop fusion. [2] Map functions can be and often are defined in terms of a fold such as foldr, which means one can do a map-fold fusion: foldr f z . map g is equivalent to foldr (f .
Swing is a highly modular-based architecture, which allows for the "plugging" of various custom implementations of specified framework interfaces: Users can provide their own custom implementation(s) of these components to override the default implementations using Java's inheritance mechanism via LookAndFeel.
A common example is the iostream library in C++, which uses the << or >> operators for the message passing, sending multiple data to the same object and allowing "manipulators" for other method calls. Other early examples include the Garnet system (from 1988 in Lisp) and the Amulet system (from 1994 in C++) which used this style for object ...
The differences between the programming languages C++ and Java can be traced to their heritage, as they have different design goals.. C++ was designed for systems and applications programming (i.e., infrastructure programming), extending the procedural programming language C, which was designed for efficient execution.
The basic steps in the Texas Tommy were followed by a breakaway identical to that found in the Lindy. Savoy dancer "Shorty" George Snowden told Marshall Stearns in 1959 that "We used to call the basic step the Hop long before Lindbergh did his hop across the Atlantic. It had been around a long time and some people began to call it the Lindbergh ...
The original AWT was a simple Java wrapper library around native (operating system-supplied) widgets such as menus, windows, and buttons. Swing was the next generation GUI toolkit introduced by Sun in Java Platform, Standard Edition (J2SE) 1.2. Swing was developed to provide a richer set of GUI software components than AWT.