S-Lang (programming language)
| Usual file extensions | sl |
|---|---|
| Paradigm | imperative, procedural, scripting |
| Appeared in | 1992 |
| Designed by | John E. Davis |
| Developer | John E. Davis |
| Stable release | 2.2.2 (December 5, 2009) |
| Typing discipline | dynamic, strong |
| Influenced by | C |
| License | GPLv2 |
| Website | S-Lang website |
S-Lang is an interpreted programming language designed by John E. Davis to provide extensibility to C-based applications in the form of an embedded interpreter. Created in 1992, its original syntax reflected its origins as a stack-oriented language, but the current syntax has evolved to more closely resemble that of C. S-Lang is small, simple, and dynamically typed, with strong support for numerical array-based operations. Because of its size and ease-of-embedding,[dubious ] S-Lang has been embedded in non-numerical programs such as the slrn newsreader and the JED text editor.
Example
Several aspects of the language are illustrated by the following example. These include support for array-based arithmetic, function qualifiers, and object-oriented style method calls. The example makes use of the Grace plotting module to plot an exponentially damped sine curve with overplotted points from a file:
slsh> require ("grace"); % load the grace module
slsh> g = grace_new (); % create an instance of grace
slsh> x = [0.01:10*PI:#1000];
slsh> y = exp(-x)*sin(x);
slsh> g.plot (x,y; logx);
slsh> readascii("file.dat", &x, &y; cols=[1,3]);
slsh> g.oplot (x,y; color="red");
See also
External links
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