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~ vs - operator effect on skill query

eDaNoy

 Good day everyone..

I have been notified by my leader upon using this ~ on one of my skill program...

 
he ask me the difference on using ~ with -, and i cant give him the right answer,

example: Taking radius of Rounded Square shape

Routine 1                                                            Routine 2

 (foreach item shape                                    vs       (foreach item shape     

       radius=item~>segments~>radius                         radius=car(item->segments)->radius

)                                                                               radList=cons(radius radList)

                                                                                 )

upon validating the above routines:

i could conclude that routine 1 could give me the list of radius that i want without doing the cons function of routine 2.

these are my understanding.

Please help me about this operator...

thank you in advance. just needed it so badly, if i cant convince him, i will surely rewrite my program using what they had used to,  which is this -

please give some sample routine that make this(~) so usefull

thanks again

  • In the Skill Language User Guide go to section Data Structures -> Access Operators for a description of the differences.

    For Allegro Skill dbids, there is no difference you can use either although most C/C++ programmers use the arrow operator except if you use to Skill program in the Cadence IC world where the squiggle seems to be more prevelant.

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