Ruby文件读写 #

file = File.open("test.txt", "r")
content = file.read
file.close

File.open("test.txt", "r") do |file|
  content = file.read
end

content = File.read("test.txt")

File.foreach("test.txt") do |line|
  puts line
end

lines = File.readlines("test.txt")

File.write("test.txt", "Hello, World!")

File.open("test.txt", "w") do |file|
  file.puts "Line 1"
  file.puts "Line 2"
end

File.open("test.txt", "a") do |file|
  file.puts "Appended line"
end

File.exist?("test.txt")
File.file?("test.txt")
File.directory?("test.txt")
File.size("test.txt")
File.extname("test.txt")
File.basename("test.txt")
File.dirname("test.txt")
File.mtime("test.txt")
File.ctime("test.txt")
File.atime("test.txt")

File.readable?("test.txt")
File.writable?("test.txt")
File.executable?("test.txt")
File.chmod(0644, "test.txt")
File.chown(1000, 1000, "test.txt")

FileUtils.touch("new_file.txt")
File.delete("test.txt")
File.rename("old.txt", "new.txt")
FileUtils.cp("source.txt", "dest.txt")
FileUtils.mv("source.txt", "dest/")
FileUtils.rm_rf("directory")

File.open("test.txt", "r") do |file|
  file.seek(0)
  file.pos
  file.rewind
  file.eof?
end