Programming terms starting with R

74 terms

race condition See race hazard.
race hazard A situation that arises between multiple threads sharing a resource. A race hazard arises when one thread's assumptions about the state of a resource are…
radio buttons A group of selectable components in which only one component may be selected. Selection of one of the group causes the previously selected component to be…
Random Access Memory Random access memory, or RAM, is memory whose contents are easily accessible to the processing components of a computer.
RAR Resource Adapter Archive. A JAR archive that contains a resource adapter module.
raster A cellular data structure composed of rows and columns for storing images. Groups of cells with the same value represent features. See also grid.
RDF Resource Description Framework. An XML-based language for describing online resources.
RDF schema A standard for specifying consistency rules that apply to the specifications contained in an RDF.
readable With respect to files, one that has the proper permission bit set to let you access the file.
Reader class A sub class of the Reader abstract, defined in the java.io package. Reader classes translate input from a host-dependent character set encoding into…
real number A number with an integer and a fractional part. The primitive types double and float are used to represent real numbers.
realm A server(s) that hosts a copy of the game. Each and every realm is distinct and seperate from all others and there are completely no interactions between…
reaping The last rites performed by a parent "process" on behalf of a deceased child process so that it doesn't remain a "zombie".
record All the documents and evidence plus transcripts of oral proceedings in a case.
recursion Recursion results from a method being invoked when an existing call to the same method has not yet returned.
redundant value The value of a data type that has no use or meaning within a particular context.
reentrant entity bean An entity bean that can handle multiple simultaneous, interleaved, or nested invocations that will not interfere with each other.
reference A document that discloses subject matter that is material to a determination of the patentability of a claimed invention. MPEP 2126, MPEP 2126.
referent Whatever a reference refers to, which may or may not have a name. Common types of referents include scalars, arrays, hashes, and subroutines.
reflection The process whereby radiation (or other waves) incident upon a surface is directed back into the medium through which it traveled.
regex See "regular expression".
registry An infrastructure that enables the building, deployment, and discovery of Web services.
registry provider An implementation of a business registry that conforms to a specification for XML registries (for example, ebXML or UDDI).
regular expression A single entity with various interpretations, like an elephant. To a computer scientist, it's a grammar for a little language in which some strings are…
regular expression modifier An option on a pattern or substitution, such as /i to render the pattern case insensitive. See also "cloister".
regular file A "file" that's not a "directory", a "device", a named "pipe" or "socket", or a "symbolic link".
relational operator An "operator" that says whether a particular ordering relationship is "true" about a pair of operands.
relational operators Operators, such as <, >, <=, >=, == and !=, that produce a boolean result, as part of a boolean expression.
relationship field A virtual field of an entity bean having container-managed persistence; it identifies a related entity bean.
relative filename A filename whose full path is relative to some point within a file system tree - often the current working folder (directory). For instance ../bin/javac.
remote interface One of two interfaces for an enterprise bean. The remote interface defines the business methods callable by a client.
remove method Method defined in the home interface and invoked by a client to destroy an enterprise bean.
render kit A set of renderers that render output to a particular client. The JavaServer Faces implementation provides a standard HTML render kit, which is composed…
renderer A Java class that can render the output for a set of JavaServer Faces UI components.
repetition See iteration.
request-response messaging A method of messaging that includes blocking until a response is received.
reserved word A word reserved for a particular purpose in Java, such as class, int, public, etc. Such words may not be used as ordinary identifiers.
reserved words A word with a specific, built-in meaning to a "compiler", such as if or delete.
resource Data, metadata, a collection of data, or a collection of metadata accessed as a content item. Examples: a document, a database table, a content class.
resource adapter A system-level software driver that is used by an EJB container or an application client to connect to an enterprise information system.
resource adapter module A deployable unit that contains all Java interfaces, classes, and native libraries, implementing a resource adapter along with the resource adapter…
resource manager Provides access to a set of shared resources. A resource manager participates in transactions that are externally controlled and coordinated by a…
resource manager connection An object that represents a session with a resource manager.
resource manager connection factory An object used for creating a resource manager connection.
Return Your return is the profit or loss you have on your investments, including income and change in value.
return statement A statement used to terminate the execution of a method. A method with void return type may only have return statements of the following form return; A…
return type The declared type of a method, appearing immediately before the method name, such as void in public static void main(String[] args) or Point[] in public…
return value The value of the expression used in a return statement.
RFC River Forecast Center. Centers that serve groups of Weather Service Forecast offices and Weather Forecast offices, in providing hydrologic guidance and is…
RGB Color Model A color model based upon representing a color as three components: red, green and blue. See HSB Color Model.
right shift A "bit shift" that divides a number by some power of 2.
right shift operator The right shift operator (>>) is a bit manipulation operator. It moves the bits in its left operand zero or more places to the right, according to the…
RMI Republic of the Marshall Islands.
RMI (Remote method invocation) Remote method invocation (RMI) is a feature of Java SE that enables Java objects running in one virtual machine to invoke methods of Java objects running…
RMI OP (RMI Optional Package) The RMI Optional Package (RMI OP) is a subset of Java SE 1.3's RMI functionality used in CDC-based profiles that incorporate the Foundation Profile, such…
RMI Profile The RMI Profile is a Java ME profile specification designed to support Java's Remote Method Invocation (RMI) distributed object system.
RMI-IIOP A version of RMI implemented to use the CORBA IIOP protocol. RMI over IIOP provides interoperability with CORBA objects implemented in any language if all…
RMS (Record Management System) The Record Management System (RMS) is a simple record-oriented database that allows a MIDlet to persistently store information and retrieve it later.
role (development) The function performed by a party in the development and deployment phases of an application developed using J2EE technology.
role (security) An abstract logical grouping of users that is defined by the application assembler.
role mapping The process of associating the groups or principals (or both), recognized by the container with security roles specified in the deployment descriptor.
rollback A return to a previous state that follows the failure to create an object, such as AWS CloudFormation stack.
root To trap a target in place/stuck using a "root" type spell such as Entangling Roots.
round robin allocation An allocation of timeslices that repeatedly cycles around a set of eligible threads in a fixed order.
RPC See definition for: Remote procedure call (RPC)
RTFM What you are told when someone thinks you should Read The Fine Manual.
run phase Any time after Perl starts running your main program. See also "compile phase".
run time The time when Perl is actually doing what your code says to do, as opposed to the earlier period of time when it was trying to figure out whether what you…
run-time pattern A pattern that contains one or more variables to be interpolated before parsing the pattern as a "regular expression", and that therefore cannot be…
runtime error An error that causes a program to terminate when it is being run.
runtime stack A stack structure maintained by the Java Virtual Machine that records which methods are currently being executed.
runtime system The software environment in which programs compiled for the Java virtual machine can run.
RV See Reentry Vehicle.
rvalue A "value" that you might find on the right side of an "assignment". See also "lvalue".