Delete Block Sub Entities

Here is one that I had to write today and thought I'd share.

I needed to remove all solids, color red, thickness 0.25 on layer "3D-CART-TOP" in all blocks in several drawings.

[color=#8b4513];| DELETE BLOCK SUB-ENTITIES BASED ON DXF CODE INPUTS |;[/color]

[b][color=BLACK]([/color][/b]defun c:delbent [b][color=FUCHSIA]([/color][/b]/ gc val eat el tdef fe fd[b][color=FUCHSIA])[/color][/b]
 [b][color=FUCHSIA]([/color][/b]foreach s '[b][color=NAVY]([/color][/b][b][color=MAROON]([/color][/b][color=#2f4f4f]"THICKNESS"[/color] . 0[b][color=MAROON])[/color][/b]
              [b][color=MAROON]([/color][/b][color=#2f4f4f]"CELTSCALE"[/color] . 1[b][color=MAROON])[/color][/b]
              [b][color=MAROON]([/color][/b][color=#2f4f4f]"CELTYPE"[/color]   . [color=#2f4f4f]"BYLAYER"[/color][b][color=MAROON])[/color][/b]
              [b][color=MAROON]([/color][/b][color=#2f4f4f]"CECOLOR"[/color]   . [color=#2f4f4f]"BYLAYER"[/color][b][color=MAROON])[/color][/b][b][color=NAVY])[/color][/b]
      [b][color=NAVY]([/color][/b]if [b][color=MAROON]([/color][/b]getvar [b][color=GREEN]([/color][/b]car s[b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b]
          [b][color=MAROON]([/color][/b]setvar [b][color=GREEN]([/color][/b]car s[b][color=GREEN])[/color][/b] [b][color=GREEN]([/color][/b]cdr s[b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b][b][color=NAVY])[/color][/b][b][color=FUCHSIA])[/color][/b]

 [b][color=FUCHSIA]([/color][/b]while [b][color=NAVY]([/color][/b]setq gc [b][color=MAROON]([/color][/b]getint [color=#2f4f4f]"\nGroup Code To Match [b][color=GREEN]([/color][/b] Enter to Exit [b][color=GREEN])[/color][/b]:   "[/color][b][color=MAROON])[/color][/b][b][color=NAVY])[/color][/b]
        [b][color=NAVY]([/color][/b]setq val [b][color=MAROON]([/color][/b]getstring t [color=#2f4f4f]"\nValue Match:   "[/color][b][color=MAROON])[/color][/b][b][color=NAVY])[/color][/b]

        [b][color=NAVY]([/color][/b]setq eat [b][color=MAROON]([/color][/b]strcat [color=#2f4f4f]"[b][color=GREEN]([/color][/b]"[/color] [b][color=BLUE]([/color][/b]itoa gc[b][color=BLUE])[/color][/b]
                          [b][color=BLUE]([/color][/b]if [b][color=RED]([/color][/b]> 9 gc 20[b][color=RED])[/color][/b] [color=#2f4f4f]" "[/color] [color=#2f4f4f]" . "[/color][b][color=BLUE])[/color][/b]
                          [b][color=BLUE]([/color][/b]cond [b][color=RED]([/color][/b][b][color=PURPLE]([/color][/b]= gc 1[b][color=PURPLE])[/color][/b]    val[b][color=RED])[/color][/b]
                                [b][color=RED]([/color][/b]T          [b][color=PURPLE]([/color][/b]strcase val[b][color=PURPLE])[/color][/b][b][color=RED])[/color][/b][b][color=BLUE])[/color][/b]
                           [color=#2f4f4f]"[b][color=GREEN])[/color][/b]"[/color][b][color=MAROON])[/color][/b][b][color=NAVY])[/color][/b]
        [b][color=NAVY]([/color][/b]setq el [b][color=MAROON]([/color][/b]cons [b][color=GREEN]([/color][/b]read [b][color=BLUE]([/color][/b]strcase eat[b][color=BLUE])[/color][/b][b][color=GREEN])[/color][/b] el[b][color=MAROON])[/color][/b][b][color=NAVY])[/color][/b]
        [b][color=NAVY]([/color][/b]prin1 el[b][color=NAVY])[/color][/b][b][color=FUCHSIA])[/color][/b]

 [b][color=FUCHSIA]([/color][/b]while [b][color=NAVY]([/color][/b]setq tdef [b][color=MAROON]([/color][/b]tblnext [color=#2f4f4f]"BLOCK"[/color] [b][color=GREEN]([/color][/b]not tdef[b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b][b][color=NAVY])[/color][/b]
        [b][color=NAVY]([/color][/b]setq fe [b][color=MAROON]([/color][/b]cdr [b][color=GREEN]([/color][/b]assoc -2 tdef[b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b][b][color=NAVY])[/color][/b]
        [b][color=NAVY]([/color][/b]entmake tdef[b][color=NAVY])[/color][/b]
        [b][color=NAVY]([/color][/b]while fe
          [b][color=MAROON]([/color][/b]setq fd [b][color=GREEN]([/color][/b]entget fe[b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b]
          [b][color=MAROON]([/color][/b]foreach a el
             [b][color=GREEN]([/color][/b]if [b][color=BLUE]([/color][/b]not [b][color=RED]([/color][/b]member a fd[b][color=RED])[/color][/b][b][color=BLUE])[/color][/b]
                 [b][color=BLUE]([/color][/b]setq tl T[b][color=BLUE])[/color][/b][b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b]
          [b][color=MAROON]([/color][/b]if tl
              [b][color=GREEN]([/color][/b]entmake fd[b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b]
          [b][color=MAROON]([/color][/b]setq fe [b][color=GREEN]([/color][/b]entnext fe[b][color=GREEN])[/color][/b]
                tl nil[b][color=MAROON])[/color][/b][b][color=NAVY])[/color][/b]
        [b][color=NAVY]([/color][/b]entmake [b][color=MAROON]([/color][/b]list [b][color=GREEN]([/color][/b]cons 0 [color=#2f4f4f]"ENDBLK"[/color][b][color=GREEN])[/color][/b][b][color=GREEN]([/color][/b]cons 8 [color=#2f4f4f]"0"[/color][b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b][b][color=NAVY])[/color][/b][b][color=FUCHSIA])[/color][/b]
 [b][color=FUCHSIA]([/color][/b]command [color=#2f4f4f]"_.REGENALL"[/color][b][color=FUCHSIA])[/color][/b]
[b][color=FUCHSIA]([/color][/b]prin1[b][color=FUCHSIA])[/color][/b][b][color=BLACK])[/color][/b]

The comparision list looked like this:

((0 . "SOLID")(39 . 0.25)(62 . 1)(8 . "3D-CART-TOP"))

Remember that you must include the quotation marks for string values. Just enter the point values less commas i.e. 0 0 1

A bit dangerous but powerful at the same time. -David