Time compare

time.rb

system("echo Hello > a")
system("echo Hello > b")

system("touch -r a b")

a = File.mtime("a")
b = File.mtime("b")

puts "File.mtime('a') => #{a}"
puts "File.mtime('b') => #{b}"
puts "File.mtime('a').to_i => #{a.to_i}"
puts "File.mtime('b').to_i => #{b.to_i}"
puts "File.mtime('a').usec => #{a.usec}"
puts "File.mtime('b').usec => #{b.usec}"
puts "File.mtime('a').nsec => #{a.nsec}"
puts "File.mtime('b').nsec => #{b.nsec}"

puts "(File.mtime('a') == File.mtime('b')) => #{a == b}"

https://twitter.com/hyuki/status/1363367907363749893