From: Derek Smith <derekbellnersmith@...>
Date: 2009-12-14T05:22:00+09:00
Subject: case with && not working compared to using if, works!

Hi All,

I looked through many threads for case issues and they did not help me.
I want to use case just because for this situation:


PIDF    = "/usr/local/vr/prod/tmp/pids/mongrel.pid"
d = Date.today
t = Time.now
pidhash = Hash.new
    pidhash[PIDF] = %x(ps auxwww |grep [m]ongrel|grep 80|awk '{print
$2}').chomp

File.open(PIDF).each do |line|
    hasval = pidhash.value?(line)       ### store true/false
    if hasval
        log_mtd("Running PID == PID in File
".+(d.to_s).+(t.hour.to_s).+(t.min.to_s))
        exit
    elsif (!hasval && File.size(PIDF) == 0)
        puts "PID not active yet file exists", PIDF
        exit
    elsif (!hasval && File.size(PIDF) > 0)
        puts "
        exit
    else
        puts "no con met"
        exit
    end
end


I tried this syntax and it was not meeting my expected output:
So when I substitute line with a random # I expect the 2nd condition to
be printed which it is, but its not even evaling the File.size(PIDF).  I
know this b/c I test it with a hard-coded file size.

hasval = pidhash.value?(7)          ### store true/false
case hasval
    when true
        then
        puts("Running PID == PID in File
".+(d.to_s).+(t.hour.to_s).+(t.min.to_s))
    when (false && File.size(PIDF) == 1)
        then
        puts "2nd. PID not active yet file exists", PIDF
    when (false && File.size(PIDF) == 0)
        then
        puts "3rd"
    else
        puts "no con met"
        exit
end

test: 77 lines, 1826 characters.
[root@v /usr/local/vr/test/script]# ruby test
PID not active yet file exists
/usr/local/vr/prod/tmp/pids/mongrel.pid

[root@v /usr/local/vr/test/script]# ls -l
/usr/local/vr/prod/tmp/pids/mongrel.pid
-rw-r--r--  1 root  wheel  5 Nov 16 12:17
/usr/local/vr/prod/tmp/pids/mongrel.pid


thank you!
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