1,720,962 research outputs found
Java: Preprocessing Closures in Java
No full textThe paper adds a mechanism of {\em closure} to Java. We apply to closures the same technique we exploited in extending Java with methods as parameters \cite{bellia2008,bellia2008c} and we obtain a formal definition and a prototype of Java with closures. The formal definition consists of a set of source to source translation rules that state the meaning of the new construct in terms of compositions of well known ordinary Java structures. Two variants of the transformation are discussed to allow recursive defined closures and other mechanisms. The notion of {\em shared variable} as a local variable that is allocated in the heap is also discussed. Eventually, since the resulting transformation is one pass process, it can be implemented through a source to source, one pass, preprocessor \cite{bellia2007,bellia2008b}, easy to write using standard development tools \cite{levine1995,donnely2006}
{Java: Higher Order Programming in Java -- The Technical Complements
No full textThe paper contains the technical complements of the paper, of the same authors, published in the book "Java in Academia and Research", iConcept Press Ltd, 2011, that describes the extensions of Java 1.5 with Higher Order (H.O. for short) mechanisms. The present complements contain the complete tables of (i) The translation semantics of a form of closure for Java; (ii) The translation semantics of H.O. methods with mc\_parameters as arguments; (iii) The translation semantics of Java extended with the above mechanisms put together; (iv) Theorems, lemmas and proofs of all the properties of the mechanisms and of the semantics discussed in the paper.<br /
Java: The Structures and the Implementation of a Preprocessor for Java with m\_parameters
No full textIn \cite{bellia2008} an extension of Java is described which allows methods to have other methods as parameters and a meaning preserving transformation is defined, which maps programs in the extended language into ordinary Java programs. In this paper we present an implementation for such extended language, based on the transformation defined. We also discuss the integration of the programs in the extended language with ordinary first order programs, and hence Java API . Eventually the language is extended with mc\_parameters for which an implementation with callbacks \cite{horstmann2007} is shown
Methods Passed as Parameters in Java: A Pre-processing Approach
No full textIn this paper we investigate the possibility of adding
higher order functionalities to Java, that is passing methods as
parameters to other methods. The approach is based on a mechanism which offers a restricted, disciplined, form of function abstraction but suitable to the integration of high order and Object Oriented programming. We discuss how the expressive power of the language is increased. A new syntax is introduced for formal and actual parameters, hence the paper shows an implementation of the extentions based on a preprocessing technique tha maps programs of the extended language into programs of ordinary Java
Java SAM Typed Closures: A Sound and Complete Type Inference System for Nominal Types (Extended Version)
No full textThe last proposal for Java closures, as emerged in JSR 000335, is mainly innovative in: (1)Use of nominal types, SAM types, for closures; (2) Introduction of target types and compatibility for a contextual typing of closures; (3) Need for a type inference that reconstructs the omitted type annotations of closures and closure arguments. The paper provides a sound and complete type system, with nominal types, for such a type inference and discusses role and formalization of targeting and of compatibility in the designed inference process
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
From Object Calculus to Java with Passing and Extraction of Methods
No full textHigher order programming is considered a good methodology for program
design and specification, furthermore it is fundamental for rapid prototyping. The paper is devoted to higher order programming in Java and, more in general,
in the OO programming paradigm. It extends \cite{high2} and discusses introspection to support higher order programming and compares this technique with other different, interesting approaches, including function emulation and function integration. Finally, it addresses the problem of embedding, in the OO paradigm,
suitable mechanisms for method passing and method extraction: It exemplifies the use in OO programming and discusses language definition techniques
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