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# Topic: Function

###### In the News (Tue 16 Apr 19)

 Function Reference « WordPress Codex Some of the functions, known as Template Tags, are defined especially for use in WordPress themes. There are also some functions related to actions and filters (the Plugin API), which are therefore used primarily for developing plugins. Remove functions from the list, if you think they could not possibly be useful to plugin developers, or if they have been deprecated. codex.wordpress.org /Function_Reference   (767 words)

 Function (mathematics) - Wikipedia, the free encyclopedia As a mathematical term, "function" was coined by Gottfried Leibniz in 1694, to describe a quantity related to a curve, such as a curve's slope at a specific point of a curve. The squaring function is the inverse of the non-negative square root function. The number of computable functions from integers to integers is countable, because the number of possible algorithms is. The number of all functions from integers to integers is higher: the same as the cardinality of the real numbers. en.wikipedia.org /wiki/Function_(mathematics)   (3304 words)

 Function - Wikipedia, the free encyclopedia In common parlance, as well as in engineering, function denotes a property of something, and which is used/applied for an objective/goal/purpose/scope. In language studies, the grammatical function of a word or phrase in a sentence. In fact, it is possible to realize the same function using different physical processes, and one process can be a carrier of multiple functions. en.wikipedia.org /wiki/Function   (410 words)

 FUNCTION - LoveToKnow Article on FUNCTION   (Site not responding. Last check: 2007-10-26) A function which has a finite differential coefficient at all points of an interval is continuous throughout the interval, but if the differential coefficient becomes infinite at a point of the interval the function may or may not be continuous throughout the interval; on the other hand a function may be continuous without being differentiable. Functions of Several Variables.A function of several variables differs from a function of one variable in that the argument of the function consists of a set of variables, or is a variable point in. The function may be given by specifying the domain of the argument and the rule of calculation, or else the function may have to be determined in accordance with certain conditions; for example, it may have to satisfy in a prescribed domain an assigned differential equation. 3.1911encyclopedia.org /F/FU/FUNCTION.htm   (14583 words)

 Continuous Function Encyclopedia @ Encyclopedia.LocalColorArt.com (Local Color Encyclopedia)   (Site not responding. Last check: 2007-10-26) In mathematics, a continuous function is a function for which, intuitively, small changes in the input result in small changes in the output. Such a function can be represented by a graph in the Cartesian plane; the function is continuous if, roughly speaking, the graph is a single unbroken curve with no "holes" or "jumps". If a function has a domain which is not an interval, the notion of a continuous function as one whose graph you can draw without taking your pencil off the paper is not quite correct. encyclopedia.localcolorart.com /encyclopedia/Continuous_function   (1026 words)

 Mathematics and Statistics - Function Function is a refereed mathematics journal aimed principally at students in the upper years of secondary schools, and more generally to anyone who is interested in mathematics. In Function there is something for everyone who is interested in the wonders of mathematics, because it deals with mathematics in all its aspects: pure mathematics, statistics, mathematics in computing, applications of mathematics to the natural and social sciences, history of mathematics, mathematical games, careers in mathematics, and mathematics in society. Function is produced by the Department of Mathematics at Monash University and it is published five times a year. www.maths.monash.edu.au /function   (245 words)

 Define function - a definition from Whatis.com Other functions need to make requests of the operating system in order to perform their work. A function is usually symbolized by a lowercase, italicized letter of the alphabet, followed by the independent variable in parentheses. Functions are often graphed, and they usually appear as lines or curves on a coordinate plane. whatis.techtarget.com /definition/0,,sid9_gci212167,00.html   (306 words)

 function Shell functions are a way to group commands for later execution using a single name for the group. The exit status of a function is the exit status of the last command executed in the body. When a function is executed, the arguments to the function become the positional parameters during its execution. www.ss64.com /bash/function.html   (317 words)

 PlanetMath: function There is no universal agreement as to the definition of the range of a function. Some authors define the range of a function to be equal to the codomain, and others define the range of a function to be equal to the image. This is version 11 of function, born on 2001-10-19, modified 2005-06-01. planetmath.org /encyclopedia/Function.html   (139 words)

 Utility Function Encyclopedia @ aNewLow.com (A New Low)   (Site not responding. Last check: 2007-10-26) The concept is also used in utility functions, social welfare functions, Pareto maximization, Edgeworth boxes and contract curves. When speaking of cardinal utility, it could be concluded that the cup of coffee is exactly the same amount better as a cup of tea as the cup of tea is better than the cup of water. While preferences are the conventional foundation of microeconomics, it is convenient to represent preferences with a utility function and reason indirectly about preferences with utility functions. www.anewlow.com /encyclopedia/Utility_function   (799 words)

 CLHS: Special Operator FUNCTION The value of function is the functional value of name in the current lexical environment. If name is a function name, the functional definition of that name is that established by the innermost lexically enclosing flet, labels, or macrolet form, if there is one. It is an error to use function on a function name that does not denote a function in the lexical environment in which the function form appears. www.lisp.org /HyperSpec/Body/speope_function.html   (245 words)

 PlanetMath: signum function In applications, such as the Laplace transform, this definition is adequate since the value of a function at a single point does not change the analysis. Clearly, the complex signum function reduces to the real signum function for real arguments. This is version 4 of signum function, born on 2003-05-05, modified 2003-07-18. planetmath.org /encyclopedia/SignumFunction.html   (193 words)

 [No title] These functions can either be independent functions, such as those shown in Figure 1, or member functions either of a nonparameterized or parameterized reference, value, or interface class, as shown in Figure 2. If the function is a member of a parameterized class, it can also refer to the type parameters of its containing classâ”as does the third parameter of the three-argument myContainer template constructor in Figure 2. You should recall that this set consists of the functions that have the same name as the called function and for which a declaration is visible at the point of the call. msdn.microsoft.com /msdnmag/issues/05/10/PureC   (2547 words)

 A Proposal to add a Polymorphic Function Object Wrapper to the Standard Library Function pointers in C and C++ are used in both user and library code to customize the behavior of components by substituting a user-supplied function for part of a computation. Several function object wrappers (often referred to as "callbacks") have appeared with similar interfaces [1, 2, 10, 11], suggesting that this class template is appropriate for standardization. Polymorphic function object wrappers may also be used in lieu of arbitrary function objects whose type is a template parameter, allowing a trivial switch from function templates to functions (with a corresponding size/speed tradeoff). std.dkuug.dk /jtc1/sc22/wg21/docs/papers/2002/n1402.html   (2122 words)

 Defining Functions   (Site not responding. Last check: 2007-10-26) Functions allow local variables that exist only inside the function and can hide other variables that are outside the function. Basically this program creates a positive integer multiplication function (that is far slower than the built in multiplication function) and then demonstrates this function with a use of the function. Rewrite the area.py program done in 3.2 to have a separate function for the area of a square, the area of a rectangle, and the area of a circle. www.honors.montana.edu /~jjc/easytut/easytut/node9.html   (1170 words)

 CLHS: System Class FUNCTION A function is an object that represents code to be executed when an appropriate number of arguments is supplied. A function is produced by the function special form, the function coerce, or the function compile. Every element of this type is a function that accepts arguments of the types specified by the argj-types and returns values that are members of the types specified by value-type. www.lisp.org /HyperSpec/Body/syscla_function.html   (446 words)

 Client-Side JavaScript Reference All parameters are passed to functions by value; the value is passed to the function, but if the function changes the value of the parameter, this change is not reflected globally or in the calling function. If a function is assigned to a variable, you can assign the variable to an event handler. Thus, a called function can call its caller without knowing the name of the particular caller, provided it knows that all of its callers have the same form and fit, and that they will not call the called function again unconditionally (which would result in infinite recursion). docs.sun.com /source/816-6408-10/function.htm   (2297 words)

 Function - Encoded Archival Description Tag Library - Version 2002 (EAD Official Site, Library of ... One option is to tag those functions for which access other than basic, undifferentiated keyword retrieval is desired. The element may be used in text elements such as . To indicate a function with major representation in the materials being described, nest within the element. www.loc.gov /ead/tglib/elements/function.html   (282 words)

 SparkNotes: Functions: Relations and Functions A function is a relation in which each input has only one output. In the relation, y is a function of x, because for each input x (1, 2, 3, or 0), there is only one output y. To check if a relation is a function, given a mapping diagram of the relation, use the following criterion: If each input has only one line connected to it, then the outputs are a function of the inputs. www.sparknotes.com /math/algebra2/functions/section1.html   (447 words)

 Control Tutorials for Matlab   (Site not responding. Last check: 2007-10-26) These types of m-files are similar to subroutines in programming languages in that they have inputs (parameters which are passed to the m-file), outputs (values which are returned from the m-file), and a body of commands which can contain local variables. The new function must be given a filename with a '.m' extension. Functions can be rather tricky to write, and practice will be necessary to successfully write one that will achieve the desired goal. www.engin.umich.edu /group/ctm/extras/function.html   (354 words)

 Biopharmaceutical Functional Genomics glossary The vagueness of the term 'function' when applied to genes or proteins emerged as a particular problem, as this term is colloquially used to describe biochemical activities, biological goals and cellular structure. Functional annotation of the genome is primarily hampered by the lack of a unified transcript index. Functional genomics aims to discover the biological function of particular genes and to uncover how sets of genes and their products work together in health and disease. www.genomicglossaries.com /content/functional_genomics_gloss.asp   (3471 words)

 Weierstrass Function   (Site not responding. Last check: 2007-10-26) The function g is continuous in R, but not differentiable at any point in R. Incidentally, there are many other functions of this type, and they are best treated in a course on complex analysis. This function, incidentally, is the one which was used to generate the logo at the title pages. web01.shu.edu /projects/reals/cont/fp_weier.html   (153 words)

 Functions As in C, the function's opening bracket may optionally appear on the second line. The function definition must precede the first call to it. f1 () { echo "Calling function \"f2\" from within function \"f1\"." f2 } f2 () { echo "Function \"f2\"." } f1 # Function "f2" is not actually called until this point, #+ although it is referenced before its definition. www.tldp.org /LDP/abs/html/functions.html   (436 words)

 JavaScript Functions A function is a reusable code-block that will be executed by an event, or when the function is called. You may call a function from anywhere within the page (or even from other pages if the function is embedded in an external.js file). Functions are defined at the beginning of a page, in the section. www.w3schools.com /js/js_functions.asp   (763 words)

 JavaScript Tutorial: Functions and Classes - Web Developer's Journal We can pass a list of parameters to a function, and we do not need to pass all of them, although we must be precise about their order. Functions have another quirk, which is that they can house local variables. But outside the function, the global x is unchanged, as we see when we write it to the screen again. www.webdevelopersjournal.com /articles/jsintro3/js_begin3.html   (1587 words)

 function   (Site not responding. Last check: 2007-10-26) The inverse of a function, a mapping from the function's outputs to its inputs, may be a relation rather than another function. A function which takes no arguments is a constant function, or simply, a constant. Since a function must return the same value for each input and the input cannot change (since it has no arguments), it must always return the same value. www.nist.gov /dads/HTML/function.html   (301 words)

 Hash Function A Hash Function is a Unary Function that is used by Hashed Associative Containers: it maps its argument to a result of type It is important for a Hash Function to minimize collisions, where a collision is defined as two different arguments that hash to the same value. In this case, one reasonable (and efficient) hash function would simply be the first character of each string. www.sgi.com /tech/stl/HashFunction.html   (308 words)

 What is function? - A Word Definition From the Webopedia Computer Dictionary   (Site not responding. Last check: 2007-10-26) In this sense, a function is a type of procedure or routine. Some programming languages make a distinction between a function, which returns a value, and a procedure, which performs some operation but does not return a value. Most programming languages come with a prewritten set of functions that are kept in a library. www.webopedia.com /TERM/f/function.html   (322 words)

 Binary Function A Binary Function is a kind of function object: an object that is called as if it were an ordinary C++ function. A Binary Function is called with two arguments. The range of a Binary Function is the set of all possible value that it may return. www.sgi.com /tech/stl/BinaryFunction.html   (151 words)

 PHP: main - Manual There is no function named main() except in the PHP source. One feature is to provide links to a manual page in PHP error messages when the PHP directives html_errors (on by default) and docref_root (on by default until PHP 4.3.2) are set. Please add a user comment below that mentions what PHP function caused the error that linked to main() and it will be fixed and properly documented. www.php.net /function.main   (199 words)

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