From: Robert Klemme <shortcutter@...>
Date: 2009-10-07T15:10:06+09:00
Subject: Re: How to not display output of a system call.

On 07.10.2009 04:58, 7stud -- wrote:
> Jerry Piazza wrote:
>> I am now trying to impliment this.
>>
>> I created this:
>> def spinner spin_trigger
>>  while (spin_trigger == true)

Comparing with "true" or "false" to obtain a boolean value is a very bad 
idea - especially in Ruby which has two false values and unlimited true 
values.

>>   print "\\\r"
>>   sleep 1
>>   print "|\r"
>>   sleep 1
>>   print "/\r"
>>   sleep 1
>>   print "-\r"
>>   sleep 1
>>  end
>> end
>>
>> spin = true
>> Thread.new do
>>   spinner spin
>> end
>> files = Dir.glob("c:/**/*.txt")
>> spin = false
>>
>> But all I get is a "\" stuck at the beginning of the line until the Dir 
>> command finishes.
>>
>> Maybe I am confused about the usage of Thread?
> 
> I think you have some more basic issues to deal with first.  What do you 
> think the output of the following code will be:
> 
> def test(x)
>   while x == 20
>     sleep 3
>     puts x
>   end
> end
> 
> x = 10
> test(20)
> x = 30

Absolutely!

	robert


-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/