Boy, is the shell powerful. Post: 302804497

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The Lounge What is on Your Mind? Boy, is the shell powerful. Post 302804497 by DGPickett on Wednesday 8th of May 2013 04:26:08 PM

05-08-2013

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We used to say "C is an assembly language looking for a CPU!" You can ask the CPU to do all general tasks with it, and can package any CPU features into calls or optimized libraries. Since GCC is free and open, it has been the first language out of the box for many CPUs.

If you want the best of both, one friend loved PERL so much he went back and rewrote all his shell and C tools. PERL and JAVA let you call C/C++ APIs, so you can have it both ways. C++ can call JAVA bits, too. Python is out in the same direction as PERL, but just a bit crazier!

My customers want me to maintain what they have and write things they can get suport for, so favoritism is not on my menu! Just save me from csh!

Maybe the large database apps will determine the next language. The COBOL-esque nature of SQL keeps suggesting its demise, even as the set-language problem definition allows massive parallelism. Maybe the final winner will be a database of persistent objects finding each other in OO ways.

Even a tech carrying the best scope often has a knife in his pocket. C will persist as the fast, simple and 'close to assembly' tool. OO will continue to thrive and grow for things it does well.

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platform::shell

platform::shell(n)					       Tcl Bundled Packages						platform::shell(n)

__________________________________________________________________________________________________________________________________________________

NAME

       platform::shell - System identification support code and utilities

SYNOPSIS

       package require platform::shell ?1.1.4?

       platform::shell::generic shell
       platform::shell::identify shell
       platform::shell::platform shell
_________________________________________________________________

DESCRIPTION

       The platform::shell package provides several utility commands useful for the identification of the architecture of a specific Tcl shell.

       This  package  allows the identification of the architecture of a specific Tcl shell different from the shell running the package. The only
       requirement is that the other shell (identified by its path), is actually executable on the current machine.

       While for most platform this means that the architecture of the interrogated shell is identical to the architecture of  the  running  shell
       this  is  not generally true. A counter example are all platforms which have 32 and 64 bit variants and where a 64bit system is able to run
       32bit code. For these running and interrogated shell may have different 32/64 bit settings and thus different identifiers.

       For applications like a code repository it is important to identify the architecture of the shell which will  actually  run  the  installed
       packages, versus the architecture of the shell running the repository software.

COMMANDS

       platform::shell::identify shell
	      This command does the same identification as platform::identify, for the specified Tcl shell, in contrast to the running shell.

       platform::shell::generic shell
	      This command does the same identification as platform::generic, for the specified Tcl shell, in contrast to the running shell.

       platform::shell::platform shell
	      This command returns the contents of tcl_platform(platform) for the specified Tcl shell.

KEYWORDS

       operating system, cpu architecture, platform, architecture

platform::shell 						       1.1.4							platform::shell(n)