Ruby Question?

[ACADuser]

What I want to do is test a global variable to see if I already assigned a valid value to it. If not assign a value now.

Any value < 35 or nil is invalid for my requirements

 

if $roof_tl < 35.0

     $roof_tl=40.0

end

 

This is the error

Evaluation Error: Ruby NoMethodError: undefined method `<' for nil:NilClass

 

[Joe_Carrick]

if $roof_ti.nil?

     $roof_ti=40.0

elsif $roof_tl < 35.0

     $roof_tl=40.0

end

[ACADuser]

Thanks for that Joe.

 

I started playing around again after not using these macros for some time.

There is another error I can not understand.

 

# total_roof_Load_CMU_wall_Label

# apply to a closed polyline label.

# =================================

# Alan Butler 10/06/2018

# Calculate the roof + wall + foundation weight for a

# onestory 10' CMU wall + 2' stem wall

# Foundation 16"x8" 150# concrete

# =================================

_area = owner.area


if $roof_ti.nil?

$roof_ti=40.0 # Global Roof Total Load = 40.0 asphalt roofing

elsif $roof_tl < 35.0

$roof_tl=40.0

end

_roofTL = $roof_tl

_RL=(_area * _roofTL)

cmu8psf=55.0 # normal average weight 8" block w/ verticals grouted @ 48"oc


ftr_w= 16.0 #footer width in inches

ftr_h= 8.0 #footer heith in inches

ftr_wt= (ftr_w*ftr_h/144.0*150) #footer weight in PLF w/ 150# / ft3 CC


wall_ht= 10.0 # wall height

wall_wt= ((wall_ht + 2.0) * cmu8psf) # 10'-0" CMU wall weight with 3 course stem wall = 12' total height


plf = (wall_wt+ftr_wt+(_area * _roofTL)).round(1) # Wall + Footer + Roof

psf=(plf / (ftr_w / 12.0)).round(1) # soil PSF


str="Roof Load #{_area.round(1).to_s} x #{$roof_tl.to_s} TL=#{ (_area.round(1)*$roof_tl).to_s} PLF\n" \

+ "CMU Wall #{wall_wt.round(0)} PLF \n"\

+ "16x8 Foundation #{ftr_wt.round(1).to_s} PLF \n"\

+ "#{plf.to_s} PLF TL on Soil \n"\

+ "#{psf.to_s} PSF Soil Load"

 

 

I don't remember this error before.

Evaluation Error: Ruby ArgumentError: cannot add a Measurement of area to a unitless value

Stack Trace:

from (eval):28:in `+'

from (eval):28:in `block (3 levels) in <main>'

from (eval):1:in `instance_eval'

from (eval):1:in `block (2 levels) in <main>'

from eval:9:in `eval'

from eval:9:in `block (2 levels) in <main>'

from eval:3:in `loop'

from eval:3:in `block in <main>'

 

[Chopsaw]

Likely your _area = owner.area needs to be converted to a float.   

 

_area = owner.area.to_f

 

 

Yup that should do it....       

 

It would be nice if chief could include the line number in the error code.....  Oh and number the lines.

[ACADuser]

Wow, you mean we can not multiply a floating-point value by an integer?

 

I'm sure this worked last time I used it in X11.

 

Yes, it looks very difficult to troubleshoot ruby in Chief.

 

How do you find out a variable value during the run of a routine?

 

I don't see a way to test a variable to see if it is a string, integer or float.

 

 

 

[ACADuser]

How about this one?

_area = owner.area
if _area.nil?
  "No Area"
else
   _area=_area.to_f
  plf = (_area * $roof_t).round(1).to_s
end

 

[Joe_Carrick]

The error in post #3 is in line 28.  from (eval):28:in '+'

• wall_wt= ((wall_ht + 2.0) * cmu8psf) # 10'-0" CMU wall weight with 3 course stem wall = 12' total height

You have tried to add a floating point value to a measurement.

• wall_ht is a measurement in X12
• 2.0 is a floating point value

This is not allowed in Chief so you either need to change 2.0 to a measurement or wall_ht to a floating point.

Adding or subtracting measurements and non-measurements is not allowed.  IMO Chief should have made this work by automatically converting the non-measurement value to a measurement of the same units.

 

[ACADuser]

Thank you Joe!

 

I got this to work too:

 

_area = owner.area

 

if $roof_tl.nil?

$roof_tl=40.0 # Global Roof Total Load = 40.0 asphalt roofing

elsif $roof_tl < 35.0

$roof_tl=40.0

end

 

_RL=(_area.to_f * $roof_tl)

 

if _area.nil?

"No Area"

else

_area=_area.to_f

plf = "AREA LOAD "+(_area * $roof_tl).round(1).to_s + "#"

end

 

 

BTW is there a simple way to add code tags to this forum post?

 

[Joe_Carrick]

Another way to trap errors is to use the following:

• begin
•   if $roof_ti < 35.0    # This line could generate an error if $roof_ti has not been initiated
•     $roof_ti = 40.0  
•   end
• rescue
•   $roof_ti = 40.0 
• end

In this case if the error occurs in the line #2 it's trapped and line #6 is processed.  This is standard Ruby error handling.