The Data Model Resource Book, Vol. 2: A Library of Data by Len Silverston

By Len Silverston

A brief and trustworthy option to construct confirmed databases for center enterprise functionsIndustry specialists raved concerning the information version source e-book while it used to be first released in March 1997 since it supplied an easy, least expensive option to layout databases for center enterprise services. Len Silverston has now revised and up to date the highly winning First version, whereas including a spouse quantity to maintain extra particular specifications of other companies. every one quantity is observed by way of a CD-ROM, that's offered individually. every one CD-ROM presents robust layout templates mentioned within the books in a ready-to-use digital layout, permitting businesses and contributors to boost the databases they want at a fragment of the associated fee and a 3rd of the time it should take to construct them from scratch.With every one enterprise functionality boasting its personal listing, this CD-ROM presents various information versions for particular implementations in such components as monetary companies, assurance, retail, healthcare, universities, and telecom.

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We extract the contents of the list to compute the result. Note that, we do not return an object passed to the function. We always create a new object out of the resultant matrix object. This ensures the integrity of the variables in the workspace. We will change this function further to return multiple output parameters. isAllPositive()) { II 12 ma;u=rnZ; 13 1 14 1 I5 result. createMatrix(min)); I 6 result. createMatrix(max)); I 7 return result; This method could take variable number of arguments and it could return more than one output parameters.

626e-34; 0 Woodhead Publishing Limited, 2011 Programming 35 Like a program, a function is also created in the m-file. The file name must be same as the function name for the sake of traceability. The interpreter uses the file name as the function name. In MATLAB or Octave, you could define multiple functions or procedures in the same file; numEclipse does not allow this for the sake of simplicity. Like a program, the function file must reside under the “Source” folder, within any nested folder if required.

On the start-up, the application loads all the m-script and java functions into a library. All functions, built-in or user-defined, are loaded through a common mechanism using Java Reflection APIs. The library manager also keeps track of the “dll” files added by the user as described in the previous chapter. Java reflection is known to be slow in loading a class/method but in numEclipse all functions are pre-loaded in a hash table so the cost of calling the functions is not so high. The library manager maintains a precedence rule for the function calls.

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