str.split(//).each {|e|print (e.unpack('H*').to_s + "\n")}
#irb
# 52
# 75
# 62
# 79
# =>["R", "u", "b", "y"]
这个是将一串字符串转化成数组的方法
(1) 在默认无参传入的时候 ,是以空格为间隔 ,获得数组
pry(main)> " now's the time".split=> ["now's", "the", "time"]
(2) 如果接受一个字符参数 ,那么会按照这个字符参数进行分割变成数组
pry(main)> "mellow yellow".split("ello")=> ["m", "w y", "w"]
(3)如果接受的是两个参数 ,后面的参数是用来确定分割数组里面元素的个数,如果在按规则分割的时候 剩下多余的就变成一个元素
pry(main)> "mellow,yellow".split(//,4)=> ["m", "e", "l", "low,yellow"]
(4)当然split 参数 也接受正则表达式,如下
pry(main)> "hi mom".split(%r{\s*})=> ["h", "i", "m", "o", "m"]
c中是strstr.ruby 1.9.3中包含:
include? other_str → true or false click to toggle source
Returns true if str contains the given string or character.
"hello".include? "lo" #=>true
"hello".include? "ol" #=>false
"hello".include? ?h #=>true