字符串转成字符数组:
>>str = "ABC"
=>"ABC"
>>chars = str.scan(/./)
=>["A", "B", "C"]
函数给你个python的参考吧,话说我python居然还真没忘。。。
'''正向操作
def f(x):
s = ""
for i in range(len(x)):
if i % 2 == 0:
s = s + ' '
s = s + x[i]
return s[1:]
'''逆向操作
def f_rev(x):
s = ""
'''凡是偶数位的空格删掉
'''
for i in range(len(x)):
if (i-2) % 3 == 0 and x[i] == ' ':
continue
s += x[i]
return s
'''测试
s = "abcdedg"
print (f_rev(f(s))
生成0-3的随机数 num = rand(3)生成字符
def st(length=2)
chars = 'abcdefghjkmnpqrstuvwxz'
string = ''
length.downto(1) { |i| string <<chars[rand(chars.length - 1)] }
string
end
可以用正则表达式。但至于打印,则不能直接地做到,要保存为一个文件,如1.txt,再用Win32API调用Shell32.dll中的ShellExecute-----------------------------------------------
#保存为*.rb[API_Studier原创]
a="juoiu980010-3210-d903hyuy-w345-78u0-opeinhhu00f1-8971-3231sdfsf".split("-")#分割"-"
b=a[0][-4,4]+"-"+a[1]+"-"+a[2][0,4] #第一个mac地址
c=a[5][-4,4]+"-"+a[6]+"-"+a[7][0,4] #第二个mac地址
d=File.open("1.txt","w")
d.puts(b) #写入第一个mac地址
d.puts(c) #写入第二个mac地址
d.close
require'Win32API'
Win32API.new("shell32","ShellExecute","lppppl","l").call(0,"Print","1.txt","","",5) # 打印
#用完以后删除1.txt