我正在嘗試創建正則運算式并在 javascript 中進行測驗。
規則：文本只能是 8 個字符。僅包含大寫字母和數字 1-5 不包含小寫字母或特殊字符或 6-7 數字。
例子：
12345678 -- false
a2345678 -- false
aabbccdd -- false
AABB33DD -- true // contains BOTH uppercase and
numbers between 1-5 and nothing else
AABB88DD -- false
AABBCCDD -- false
AABB3.DD -- false
代碼：
var pattern = new RegExp("^(?=.*[1-5])(?=.*[A-Z]). $");
pattern.test(code)
我無法創建正確的正則運算式。有人可以幫忙嗎？
uj5u.com熱心網友回復：
采用
^(?=.*[1-5])(?=.*[A-Z])[A-Z1-5]{8}$
請參閱正則運算式證明。
解釋
--------------------------------------------------------------------------------
^ the beginning of the string
--------------------------------------------------------------------------------
(?= look ahead to see if there is:
--------------------------------------------------------------------------------
.* any character except \n (0 or more times
(matching the most amount possible))
--------------------------------------------------------------------------------
[1-5] any character of: '1' to '5'
--------------------------------------------------------------------------------
) end of look-ahead
--------------------------------------------------------------------------------
(?= look ahead to see if there is:
--------------------------------------------------------------------------------
.* any character except \n (0 or more times
(matching the most amount possible))
--------------------------------------------------------------------------------
[A-Z] any character of: 'A' to 'Z'
--------------------------------------------------------------------------------
) end of look-ahead
--------------------------------------------------------------------------------
[A-Z1-5]{8} any character of: 'A' to 'Z', '1' to '5'
(8 times)
--------------------------------------------------------------------------------
$ before an optional \n, and the end of the
string
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標籤：javascript 正则表达式
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