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Full Discussion: Multidimensional arrays
Top Forums Shell Programming and Scripting Multidimensional arrays Post 302558052 by cjcox on Thursday 22nd of September 2011 03:51:08 PM
Old 09-22-2011
Depends on what "shell". Even in ancient of days Bourne shell (something you'll still find on many Solaris hosts), you can always think of an array as:

varname_${index1}_${index2}

If you just had to. In other words, you can use variable values to create unique variable names... and thus get an array effect.

bash and ksh have arrays, new editions of korn shell (and bash as well) support single dimension indexed as well as associative arrays. You can exploit associative arrays to do quasi-multi dimensional array indexing using a similar technique to what I described for bourne shell... e.g varname["${index1} ${index2}"]

So assignment isn't necessarily hard in the bourne shell case... but evaluating requires an extra level of evaluation to be performed, so you have to do some extra escaping.

Code:
index1=9
index2=12
eval varname_${index1}_${index2}=\"my value\"

eval val=\"\$varname_${index1}_${index2}\"

Korn/bash won't have this extra eval requirement. So you can just do (in bash):

Code:
declare -A varname
index1=1
index2=2
varname["${index1} ${index2}"]='my value'

val=${varname["${index1} ${index2}"]}

(I realize I'm not being consistent... the underscore is a requirement in the bourne shell case, since it's just named variables really, and I'm using space as the separator between the indices in the korn/bash associative array case)

Hope that helps get you on your way!!

Last edited by cjcox; 09-22-2011 at 05:06 PM.. Reason: forgot braces on associative array, added more data and formatting.
 

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GENLIB_PLACE_ON.3(October 1, 1997)										GENLIB_PLACE_ON.3(October 1, 1997)

NAME
GENLIB_PLACE_ON - place a physical instance in the current figure matching connectors SYNOPSYS
#include <genlib.h> void GENLIB_PLACE_ON(figname,ins1,con1,index1,symetry,ins2,con2,index2) char *figname, *ins1, *con1, *ins2, *con2; char symetry; long index1, index2; ORIGIN
This software belongs to the ALLIANCE CAD SYSTEM developed by the ASIM team at LIP6 laboratory of Universite Pierre et Marie CURIE, in Paris, France. Web : http://asim.lip6.fr/recherche/alliance/ E-mail : alliance-users@asim.lip6.fr PARAMETERS
figname Name of the layout figure to be instanciated ins1 Name to be given to the instance in the model con1 Name of the connector of the instance to be used for placement index1 Index of the connector, or reference, con1 of the model to be used for placement symetry Geometrical operation to be performed on the instance before beeing placed ins2 Name of the instance to be used for relative placement con2 Name of the connector of the instance ins2 on which the placement will take place index2 Index of the connector con2 of the instance to be used for relative placement DESCRIPTION
PLACE_ON add an instance in the current layout cell. The bottom left corner of the instance of the model modelname is placed, after beeing symetrized and/or rotated, at (x, y) coordinates. The placed instance becomes the new "reference instance", used in the relative placement functions. The insname is the name given to the instance and must be unique at a given hierarchy level. The symetry argument can take eight legal values : NOSYM no geometrical operation is performed SYM_Y Y becomes -Y, that means toward X axe symetry SYM_X X becomes -X, that means toward Y axe symetry SYMXY X becomes -X, Y becomes -Y ROT_P a positive 90 degrees rotation take place ROT_M a negative 90 degrees rotation take place SY_RP Y becomes -Y, and then a positive 90 degrees rotation take place SY_RM Y becomes -Y, and then a negative 90 degrees rotation take place The model of the figure to be placed must be available, on disk or in memory. The path to the library is specified in the MBK_CATA_LIB (1) and MBK_WORK_LIB (1) environment variables, and its format is given by the MBK_IN_PH (1) environment variable. ERRORS
"GENLIB_PLACE_ON impossible : missing GENLIB_DEF_PHFIG" No figure has been yet specified by a call to DEF_PHFIG. So it isn't possible to place an instance inside it. you must call DEF_PHFIG before any other layout action. "illegal addphins : transformation is x in insname" The symetry parameter is not one of the define given, but has the integer value x. EXAMPLE
#include <genlib.h> main() { /* Create a figure to work on */ GENLIB_DEF_PHFIG("cell"); /* Place two instances */ GENLIB_PLACE_ON("gapg0_b","ins1", NOSYM, 0L, 0L); GENLIB_PLACE_ON("gapg8_b","ins2", SYM_X, 80L, 100L); /* Save all that on disk */ GENLIB_SAVE_PHFIG(); } SEE ALSO
genlib(1), GENLIB_DEF_PHFIG(3), GENLIB_SAVE_PHFIG(3), GENLIB_PLACE_TOP(3), GENLIB_PLACE_BOTTOM(3), GENLIB_PLACE_LEFT(3), GEN- LIB_PLACE_RIGHT(3), MBK_CATA_LIB(1), MBK_WORK_LIB(1), MBK_IN_PH(1). BUG REPORT
This tool is under development at the ASIM department of the LIP6 laboratory. We need your feedback to improve documentation and tools. PROCEDURAL GENERATION LANGUAGE
ASIM/LIP6 GENLIB_PLACE_ON.3(October 1, 1997)
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