ruby code example(12)

ruby code example(12)

##闭包的常见用法  
[ 'cat', 'dog', 'horse' ].each {|name| print name, " " }
  5.times {  print "*" }
  3.upto(6) {|i|  print i }	##3..6又一写法
  ('a'..'e').each {|char| print char }

##输出函数的格式字符串
printf("Number: %5.2f,\nString: %s\n", 1.23, "hello")