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ANDing 2 lists

blankman
Hi All, I have 2 lists below. I am looking to AND them together to get a 3rd list containing only the coordinates of bslist2 that correspond to the values of 't' in bslist1. What is the best way to go about this?

Thanks,

Brian.

bslist1 = (nil nil nil nil nil t t t t)

bslist2 = ((106.64 64.105) (106.64 69.895) (117.09 69.895) (117.09 63.54) (111.135 63.54) (111.135 67.755) (114.9 67.755) (114.9 66.35) (113.045 66.35))
Parents

  • Hi Brian,

    Or you can wrap Andrew's example as a function and call it using the same foreach-mapcan structure:

    
procedure(CCFandLists(blist1 blist2 "ll")
  foreach(mapcan (a b) blist1 blist2 a&&list(b))
)

foreach(mapcan (a b) bspartselobjvalidlist bspartselobjpointlist
  CCFandLists(a b)
)
=> ((-4.675 6.335) 
    (-5.39 4.74)
)

    So you can then either call the CCFandLists function directly similar to Andrew's earlier post (e.g. CCFandLists(bslist1 bslist2) ) when the lists are in that format, or you can call the function as in the above example when the lists are list-of-lists.  This way you are re-using the function...

    Regards,

    Lawrence.

Reply

  • Hi Brian,

    Or you can wrap Andrew's example as a function and call it using the same foreach-mapcan structure:

    
procedure(CCFandLists(blist1 blist2 "ll")
  foreach(mapcan (a b) blist1 blist2 a&&list(b))
)

foreach(mapcan (a b) bspartselobjvalidlist bspartselobjpointlist
  CCFandLists(a b)
)
=> ((-4.675 6.335) 
    (-5.39 4.74)
)

    So you can then either call the CCFandLists function directly similar to Andrew's earlier post (e.g. CCFandLists(bslist1 bslist2) ) when the lists are in that format, or you can call the function as in the above example when the lists are list-of-lists.  This way you are re-using the function...

    Regards,

    Lawrence.

Children
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