正则表达式1.格式check[只允许半角英数和半角逗号]123456789012345678901234,123456789012345678901234[允许],123456789012345678901234,123456789012345678901234,[允许],121456789012,123456789012,[不允许]2.长度check[以逗号为

Question

正则表达式
1.格式check[只允许半角英数和半角逗号]
123456789012345678901234,123456789012345678901234 [允许]
,123456789012345678901234,123456789012345678901234,[允许]
,121456789012,123456789012,[不允许]
2.长度check [以逗号为分界,一个字符串小于24位]
,123456789012345678901234,123456789012345678901234,[允许]
1234567890123456789012345,123456789012345678901234 [不允许]
3.纯逗号check
,[不允许]
每个情况一种正则表达式
----------------------------
,121456789012,123456789012,[不允许] -> 包含全角数字
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自己瞎想的.
1:^,*([/da-zA-Z],+[/da-zA-Z])*$
2.^,*([/da-zA-Z]{0,24},+[/da-zA-Z]{0,24})*$
3.^,+

Answer 1

1. /^[0-9\,]+$/
2. /^(?:[\,]+[0-9]{1,24})+$/
3. ! /^\,+$/ or /^(?!\,+$).+$/
4. same as 1