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Kernel$$PROCESS_ID -> Integer (36310.0)

• 2.4.0

• 変数

$$ の別名

...$$ の別名

require "English"

p sprintf("something%s", $PID) #=> "something5543" など...

Kernel$$CHILD_STATUS -> Process::Status | nil (27310.0)

• 2.4.0

• 変数

$? の別名

...$? の別名

require "English"

out = `wget https://www.ruby-lang.org/en/about/license.txt -O - 2>/dev/null`

if $CHILD_STATUS.to_i == 0
print "wget success\n"
out.split(/\n/).each { |line|
printf "%s\n", line
}
else
print "wget failed\n"
end...