Load text file and assign to variables

artmusicstudio · 13 Oct 2013, 09:58

hi,
when i reopen my text-file with parameters (1 parameter per line)

by

count = 0

File.open('C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/zf/partemp2.txt', 'r') do |f1|
while line = f1.gets
puts line

end

end

i can see the values listed in the console // OK

BUT

when i try

count = 0

File.open('C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/zf/partemp2.txt', 'r') do |f1|
while line = f1.gets
puts line

value[count]=f1.gets
      count = count + 1
end

end

it does not work

ma question is:

how can i assign the result of f1.gets to a row of variables in this loop?

thanx you

stan

TIG · 13 Oct 2013, 10:59

I think perhaps an easier format to think about would be:

file = 'C;/Program Files (x86)/Google/Google SketchUp 8/Plugins/zf/partemp2.txt'
IO.readlines(file).each_with_index{|line, i|
  line.chomp! ### removes the '\n' from the end of the line
  next if line.empty? ### this traps for empty lines
  next if line =~ /^[#]/ ### lines starting with e.g. '#' are ignored; allows for headers/comments/disabling
  puts i
  puts line
  ### or more likely do your stuff using the string 'line'
}

Note: if you don't need the index 'i', then use ' ).each{|line|' instead...

artmusicstudio · 13 Oct 2013, 11:42

hi tig and hello again,
this is great and worked inmedialtely in the ruby console.
so:
i counts the lines
line gets the value per line

maybe a small tip (i still think too much in macro-basic)

when i retrieve those values form the file,
this syntax makes problems:

assign variables from file (like reading an array from a loop)

a = line[1]
b = line[2]
c = line[3]

how could i build an array within the import routine? i tried so many ways and can#t get it...
thanx stan

TIG · 13 Oct 2013, 12:04

    file = 'C;/Program Files (x86)/Google/Google SketchUp 8/Plugins/zf/partemp2.txt'
    lines=[]
    IO.readlines(file).each{|line|
      line.chomp! ### removes the '\n' from the end of the line
      next if line.empty? ### this traps for empty lines
      lines << line
    }

NOT sure why you need separate variables... this makes an array of the lines called 'lines'
Now lines[0] is the first line, lines[1] is the second line etc [note how an array index starts at 0 not 1 !]
To find the last line use lines[-1] etc...
So you have reference to each lines using this method, without extra variables...
If you really want to set up a series of variables then you can do it thus...

### you need to set up instance variables, @v_a etc, so they get referenced outside of the {} block, plain v_a won't be referenced outside and would therefore be inaccessible...
v='@v_a'
lines.each{|e|
  eval("#{v}='#{e}'")
  v.next!
}

Now @v_a will return lines[0], @v_b gives lines[1] etc... BUT as I said sticking with lines[0], lines[1] etc seems far simpler and easier to use/control...

artmusicstudio · 13 Oct 2013, 12:37

hi tig,
thanx a lot, i inserted the new import routine and tried different variantion.
ruby gives back:
load '01.rb'
true
Error: #<NameError: undefined local variable or method lines' for #<Object:0x3d31654 @v_b="90", @v_a="300", @v_c="100">> C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/01.rb:96:in draw_stairs'
C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/01.rb:48
C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/01.rb:96:in call' C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/01.rb:96 load '01.rb' true Error: #<NoMethodError: undefined method /' for "300":String>
C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/01.rb:173:in draw_stairs' C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/01.rb:48 C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/01.rb:96:in call'
C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/01.rb:96

so the situation is:

i am created an object in skp, which can be controlled in diverse dimension by an input menue (parameters)

when the object is created, i save the parameters in a text file (parttemp2.txt):

content of parttemp2.txt now for testing:
300
90
100

it seems, that reloading these numbers gives back STRINGS and not numbers

as <ou also said, i would like to handle these imported parameters by

parameter01 = lines[0]
parameter02 = lines[1]

and so on.

but it simply does not work now for me. have to study more about formats (you know, i am on ruby since few days)

this is the whole pert of the code: (where WIDTH shall become the value of line 0 in the text-file)

require 'sketchup.rb'
#require 'offset.rb'
#require 'makesoftsmooth.rb'
.
Sketchup.send_action "showRubyPanel:"

#Add a menu item to launch our plugin.
UI.menu("PlugIns").add_item("01-ZF-Stairs"){
UI.messagebox("Outdoor-Stairs - Script - 131011-V 0.1j - Zdenek Fajfrlik")

#result = UI.messagebox "New Definition?", MB_YESNO
#if result == 6 # Yes

UI.messagebox("New Definition")

end

#count = 0

#File.open('C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/zf/partemp.txt', 'r') do |f1|
#while line = f1.gets
#puts line

#width = f1.gets  
#end

#end

file = 'C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/zf/partemp2.txt'
lines=[]
IO.readlines(file).each{|line|
line.chomp! ### removes the '\n' from the end of the line
next if line.empty? ### this traps for empty lines
lines << line
}

you need to set up instance variables, @v_a etc, so they get referenced outside of the {} block, plain v_a won't be referenced outside and would therefore be inaccessible...

v='@v_a'
lines.each{|e|
eval("#{v}='#{e}'")
v.next!
}

Call

draw_object
}

def draw_object

#***************************************************************************
#delete previous model

model = Sketchup.active_model
entities = model.active_entities
entities.to_a.each { | entity| entity.erase! }

#***************************************************************************

set start default values for MENUE 1-4

width          =  @v_a
lwidthplus     =  @v_b
rwidthplus     =  @v_c

#width          = 500
#lwidthplus     = 10
#rwidthplus     = 10

stairs         = 10      
run            = 30
rise           = 13
thickness      = 3
fill           = 4
overlap        = 6
il             = 6
rc             = 3
re             = 0
stepdevidex    = 1

sl             = 100
sr             = 100
mr             = 80
pmod           = 3
pradius        = 15
thradius       = 20
mhradius       = 4
lines          = 4
ro             = 4
rol            = 5
ror            = 5

wangenbreitel  = 30
wangenhoehel   = 10
wangeslopel    = 45.0
rampoffsetl    = 50
rampoffsetly   = 30
rampoffsetlz   = 99.0

wangenbreiter  = 30
wangenhoeher   = 10
wangesloper    = 45.0
rampoffsetr    = 50
rampoffsetry   = 30
rampoffsetrz   = 99.0

#***************************************************************************

thank you very very much for your time and helping!
STAN

TIG · 13 Oct 2013, 13:39

Please use the 'code' BBS tags for large blocks of code - it's very hard to read otherwise.

You do NOT need to assign a whole load of variables with eval...
Just use ' lines' OR whatever you call it as the array of values...
To find the first one use lines[0] and so on...

You cannot pass variables across methods unless you pass them as arguments after the method [def] name OR the methods are in the same module/class and are instance ones - starting with @....

You are making this far more convoluted than it needs to be...

Can we go back a few steps...
What is it you are trying to do exactly - I get part of it so far?
What is in the file you are reading in exactly [data/units/etc]?

You are reading in strings, NOT numbers, so convert it to a float using .to_f
Then you can use / etc on them...
parameter01 = lines[0].to_f
BUT if you know they are in cm or mm you need to use say:
parameter01 = lines[0].to_f.mm
etc...

You are getting in a muddle...

artmusicstudio · 13 Oct 2013, 14:11

hi tig,
that's it .
my logic was ok, your tip for the conversion of string to float was the point.

basicly it works like this:

i have menues for parameters

then the geometry is created

before the end of the ruby i save all parameters to a text file (by the way still looking for the syntax to save more of them line by line)

then the user can recall the ruby and select
-my last parameters
-defaults

and so on and so on

again another step!!!!

regards stan ( i'll report , when i get further)