Re: string dictionary class

[coccoinomane]

HI Jaroslev!

Thank you very much for this addition. I downloaded it but I cannot
reproduce your examples. Upon typing

> gnusoft = dict

I get the following error message:

error: string cannot be indexed with .
error: called from:
error:   ~/dict_from_svn/struct.m at line 26, column 8
error: evaluating argument list element number 1
error: evaluating argument list element number 1
error:   ~/dict_from_svn/dict.m at line 82, column 5

I have Octave 3.2.3 on Mac Os X 10.6, aka Snow Leopard. Is my Octave version
too old? I would like to install the development version from source, but
last time I tried I had all sort of problems... an updatev version of
Octave.app would be wonderful :)

Cheers,

Guido



Jaroslav Hajek-2 wrote:
> 
> hi all,
> 
> I have contributed a simple string dictionary class to the `general'
> package, which comprises
> 
> indexing by strings & cell string arrays
> indexed assignment
> inserting and deleting elements
> existence query (has)
> query with default value (get)
> 
> it is intended to work with development version of Octave, as it uses
> some new features. The implementation uses binary lookup in a sorted
> array.
> operation complexity, w.r.t. number of existing keys N is:
> retrieve and query: O(log(N))
> set existing entry: O(log(N)) with the recent subsasgn optimization
> (e79470be3ecb), O(N) without it.
> insert new key / delete existing: O(N)
> 
> it is therefore not suitable for frequent insertions but good when
> query is the major operation.
> 
> Example usage:
> 
> octave:1> gnusoft = dict
> gnusoft = dict: {}
> octave:2> gnusoft("octave") = "www.octave.org"
> gnusoft =
> 
> dict: {
>   octave : www.octave.org
> }
> octave:3> gnusoft("gcc") = "gcc.gnu.org"
> gnusoft =
> 
> dict: {
>   gcc : gcc.gnu.org
>   octave : www.octave.org
> }
> octave:4> gnusoft({"octave", "gcc", "octave"})
> ans =
> 
> {
>   [1,1] = www.octave.org
>   [1,2] = gcc.gnu.org
>   [1,3] = www.octave.org
> }
> 
> octave:5> getgnusoftaddress = @(name) get(gnusoft, name,
> "directory.fsf.org/GNU")
> getgnusoftaddress =
> 
> @(name) get (gnusoft, name, "directory.fsf.org/GNU")
> 
> octave:6> getgnusoftaddress ("octave")
> ans = www.octave.org
> octave:7> getgnusoftaddress ("bison")
> ans = directory.fsf.org/GNU
> octave:8> has(gnusoft, {"gcc", "bison"})
> ans =
> 
>    1   0
> 
> octave:9> mathgnusoft = gnusoft
> mathgnusoft =
> 
> dict: {
>   gcc : gcc.gnu.org
>   octave : www.octave.org
> }
> octave:10> mathgnusoft ({"gcc"}) = []
> mathgnusoft =
> 
> dict: {
>   octave : www.octave.org
> }
> octave:11> files = dir;
> octave:12> cache_file_stat = dict ({dir.name}, {dir.statinfo});
> octave:13> cache_file_stat ("adresamp2.m")
> ans =
> {
>   dev =  2051
>   ino =  14749998
>   mode =  33188
>   modestr = -rw-r--r--
>   nlink =  1
>   uid =  1000
>   gid =  100
>   rdev = 0
>   size =  2739
>   atime =  1.2464e+09
>   mtime =  1.2403e+09
>   ctime =  1.2403e+09
>   blksize =  4096
>   blocks =  16
> }
> 
> 
> I welcome suggestions for improvements and enhancements.
> 
> enjoy!
> 
> -- 
> RNDr. Jaroslav Hajek
> computing expert & GNU Octave developer
> Aeronautical Research and Test Institute (VZLU)
> Prague, Czech Republic
> url: www.highegg.matfyz.cz
> _______________________________________________
> Help-octave mailing list
> address@hidden
> https://www-old.cae.wisc.edu/mailman/listinfo/help-octave
> 
> 

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