如何查找一个字符串上有多少个数字和字母
[英]How to find how many numbers and letters are on a string
问题描述
I'm validating passwords. 
我正在验证密码。 I need to check how many letters and numbers there are in a password. 我需要检查密码中有多少个字母和数字。 If there were less than 2 numbers or less than 2 letters, the user should be warned about an invalid password. 如果少于2个数字或少于2个字母，则应警告用户密码无效。
1 个解决方案
解决方案1
0 已采纳 2015-10-14 13:28:49
For each character in the password, check against the ASCII table and count letters and numbers appearances: 对于密码中的每个字符，请对照ASCII表检查并计算字母和数字的出现：
Consider adding special characters to the validation. 考虑在验证中添加特殊字符。
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