大约有 43,200 项符合查询结果（耗时：0.0370秒） [XML]
Count number of objects in list [closed]
...
169
length(x)
Get or set the length of vectors (including lists) and factors, and of any other...
Ruby Bundle Symbol not found: _SSLv2_client_method (LoadError)
...
10 Answers
10
Active
...
Converting datetime.date to UTC timestamp in Python
...
10 Answers
10
Active
...
How to change the order of DataFrame columns?
...
1
2
Next
921
...
What is a regular expression which will match a valid domain name without a subdomain?
...ee comments), given your specific requirements:
/^[a-zA-Z0-9][a-zA-Z0-9-]{1,61}[a-zA-Z0-9]\.[a-zA-Z]{2,}$/
But note this will reject a lot of valid domains.
share
|
improve this answer
|...
Extracting the last n characters from a string in R
...
15 Answers
15
Active
...
How to get a string after a specific substring?
...
419
The easiest way is probably just to split on your target word
my_string="hello python world , ...
How do I modify fields inside the new PostgreSQL JSON datatype?
...
21 Answers
21
Active
...