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| Computers Forum Index » Computer Languages (Misc) » ANN: slang 2.2.0 released... |
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| Author |
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| John E. Davis... |
 Posted: Mon Aug 03, 2009 3:25 pm |
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Guest
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Version 2.2.0 of the slang library is now available. See
<http://www.jedsoft.org/slang/download.html> for downloading options.
It may take a day or so for the mirror sites to pick up the latest
version. This version contains a number of new features, as well as
bug fixes. Version 2.2.0 is binary compatible with previous slang-2
versions.
The bulk of the library is comprised of the slang interpeter, which
may be embedded into other applications to make them extensible. The
distribution includes slsh, the standalone slang interpreter. The
language itself is somewhat C-like with matlab/IDL array capabilities.
For example, if X is an array of values, then X[where(X < 0)]=0 will
set those values less than 0 to 0.
More information about the library and interpreter may be found at
<http://www.jedsoft.org/slang/>.
Enjoy, --John
NEWS for version 2.2
Interpreter Enhancements
========================
1. The ternary expression was added:
expression = condition ? val1 : val2
If condition is non-zero, then expression = val1,
otherwise expression = val2
2. The break and condition statements support an optional integer
that indicates how many loop levels the statement affects, e.g.,
the break statement in
while (1)
{
loop (10)
{
break 2;
}
}
will cause both loops to be terminated.
3. Multiline strings have been added:
"This is a \
multiline \
string"
`This is
another multiline
string that
does not require
a \ for continuation`
4. List_Type objects may be indexed using an array of indices
instead of just a single scalar index.
Modules
=======
1. zlib: A module that wraps the popular z compression library.
2. fork: A module that wraps the fork, exec*, and waitpid functions.
slsh/lib/process.sl utilizes this module to allow an
application to easily create subprocesses and pipelines.
3. sysconf: Module that implements interfaces to the posix
sysconf, pathconf, etc. functions.
Intrinsic Functions
===================
The following intrinsic functions have been added for 2.2:
sumsq
equivalent to sum(x*x)
expm1
More accurate version of exp(x)-1 for x near 0.
log1p
More accurate version of log(1+x) for x near 0
list_to_array
Creates an array from a list.
string_matches
A convenient alternative to string_match and string_match_nth
functions.
_close
Close an integer descriptor
_fileno
Returns the descriptor as an integer
dup2, getsid, killpg, getpriority/setpriority:
Wraps the corresponding system functions.
ldexp, frexp:
If x == a*2^b, where 0.5<=a<1.0 then (a,b)=frexp(x),
and x=ldexp(a,b).
The following functions have been enhanced:
hypot
If given a single array argument, it returns the equivalent
of sqrt(sum(X*X)).
polynom
The calling interface to this function was changed and
support added for arrays.
Misc
====
Unicode tables updated to version 5.1. |
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