[a] can't convert nil into String (TypeError)

[aidy]

Hi,

Can anyone tell me what the problem with this code is?


<snip>

class Test_log

def read_step_log (filepath)


@filepath = filepath

f = File.open(@filePath, "r")


while(f.gets)
if /START TESTCASE|FAILED/
print
end
end

f.close
end
end

foo = Test_log.new
foo.read_step_log('C:\Ruby_Files\StepLog.txt')


</snip>


I am getting a `initialize': can't convert nil into String (TypeError)


Thanks

Aidy

 

[rajeevnair32]

The error is in your variable name. you had accidently used "filePath"
instead of "filepath".

class Test_log
def read_step_log (filepath)
f = File.open(filepath, "r")
while(f.gets)
print if /START TESTCASE|FAILED/
end
f.close
end
end

Test_log.new.read_step_log("a.rb")

 

[aidy]

The error is in your variable name. you had accidently used "filePath"

instead of "filepath".

I apologise for that; I am from a Visual Basic background.

How am I supposed to flag silly mistakes like that with dynamic typing?

Cheers

Aidy

 

[rajeevnair32]

I know in perl, there is some like "use strict;". I believe ruby should
have some thing similar.

 

[Robert Klemme]

I know in perl, there is some like "use strict;". I believe ruby should
have some thing similar.

ruby -w

robert

 

[Robert Klemme]

I know in perl, there is some like "use strict;". I believe ruby should
have some thing similar.

ruby -w

robert

 

[bwv549]

alternative to running: ruby -w
you can put the flag at the top of your file:
#!/usr/bin/ruby -w

 

[ChrisH]

If the script is being run on a *NIX environment.

Given the OP has VB background, he's proibably on Windows...

 

[Gregor Kopp]

class Test

def initialize(argument)
puts "now im in initialize..."
@argument = argument
end

def dosomethingheyho
puts "now im in dosemethingheyho..."
puts @argument
end

end

testitman = Test.new("blah")
testitman.dosomethingheyho


If you want to pass an argument to a class, then you could also use
initialize, which is called on initialization of a class.