wrapper

I have an R package which uses lots of Fortran subroutines for nested loops of recursive linear algebra computations (depending heavily on BLAS and LAPACK routines). As an interface to Fortran, I use .Fortran function. I just read Jonathan Callahan's blog post about using .Call instead of .C in case of subroutines written in C/C++, and it got me thinking that would it be better to use .Call interface also when using Fortran subroutines, by writing a simple wrapper in C which then calls the Fortran subroutines? As said, my Fortran codes are quite simple in a sense that I just play with

Are all primitive wrapper classes in Java immutable objects? String is immutable. What are the other immutable objects? Any type which doesn't give you any means to change the data within it is immutable - it's as simple as that. Yes, all the primitive wrapper types are immutable 1 , as is String . UUID , URL and URI are other examples. Although Calendar and Date in the built-in Java API are mutable, many of the types within Joda Time are immutable - and to my mind, this is one reason why Joda Time is easier to work with. If an object is immutable, you can keep a reference to it somewhere else

In a programming language (e.g. Java), what's the difference between container and wrapper (or is there a difference). I've heard both the terms used vaguely. In programming languages the word container is generally used for structures that can contain more than one element, for example a Map , a Set or a List . These structures normally provide methods like contains , that are semantically suitable if the object can contain more than one item. A wrapper instead is something that wraps around a single object to provide more functionalities and interfaces to it. The typical example is the

I have a Cython package with wrappers of a C library. This is the tree structure of the package package/ _api.pxd _wrap.pyx setup.py wrapper/ __init__.py wrap.py Doing python setup.py build_ext --inplace puts the _wrap.so file in the top-level package/ directory which is normally required in most cases. However, my wrap.py needs the _wrap.so in the package/wrapper/ directory. I was wondering if there's a way in which setup.py could create the .so file in the desired place by itself without manually copying and pasting it in the location. The output folder for the produced .so files can be

My program writes to a log and to stdout. Every message, however, has a certain priority and the user specifies in Preferences which priorities go to which stream (log or stdout). unsigned short PRIO_HIGH = 0x0001; unsigned short PRIO_NORMAL = 0x0002; unsigned short PRIO_LOW = 0x0004; The preferences is handled by some flags: unsigned short PRIO_LOG = (PRIO_HIGH | PRIO_NORMAL); unsigned short PRIO_STD = (PRIO_HIGH); The write_log function should work with the same parameters as the printf function, with the added parameter of unsigned short priority . write_log((PRIO_NORMAL|PRIO_LOW), "HELLO

We are developing a corporate component library which should provide Material Designed Angular Components. So the users of this library are not supposed to use e.g. Angular Material directly but rather include some component like " custom-tabs ". Using the components of MatTabModule directly works like a charm, whereas when using our custom components the projected content does not show up. Usage looks very similar to the Angular Material API: <custom-tabs> <custom-tab [label]="labelA">Content A</custom-tab> <custom-tab [label]="labelB">Content B</custom-tab> <custom-tab [label]="labelC"