大约有 3,516 项符合查询结果(耗时:0.0267秒) [XML]

https://stackoverflow.com/ques... 

Regular Expressions and negating a whole character group [duplicate]

...x as you described is the simple way (as far as I am aware). If you want a range you could use [^a-f]. share | improve this answer | follow | ...
https://stackoverflow.com/ques... 

How to get cumulative sum

...id) as CumSrome FROM @t because ORDER BY clause for SUM by default means RANGE UNBOUNDED PRECEDING AND CURRENT ROW for window frame ("General Remarks" at https://msdn.microsoft.com/en-us/library/ms189461.aspx) share ...
https://stackoverflow.com/ques... 

How can I validate a string to only allow alphanumeric characters in it?

...assuming alphanumeric set is A-Z,a-z and 0-9 because this covers the whole range of Unicode letters and digits, which including non-Latin characters as well. For example, char.IsLetterOrDigit('ก') will return true. csharppad.com/gist/f96a6062f9f8f4e974f222ce313df8ca – tia ...
https://stackoverflow.com/ques... 

What is the fastest factorial function in JavaScript? [closed]

...one. However if you want to calculate the factorials of numbers within the range 0 to 1 (ie the gamma function) as well, then you cannot use that approach because the lookup table will have to contain infinite values. However, you can approximate the values of the factorials, and it's pretty fast, ...
https://stackoverflow.com/ques... 

Does a foreign key automatically create an index?

...kup a relating table and extract certain rows based on a single value or a range of values. So it makes good sense to index any columns involved in a FK, but a FK per se is not an index. Check out Kimberly Tripp's excellent article "When did SQL Server stop putting indexes on Foreign Key columns?"...
https://stackoverflow.com/ques... 

How can I parse a YAML file in Python

...rror: 'ascii' codec can't decode byte 0xe7 in position 926: ordinal not in range(128)). I've tried to set yaml.encoding to utf-8 but didn't work as the load method in YAML still uses the ascii_decode. Is this a bug? – SnwBr Jan 7 at 17:53 ...
https://stackoverflow.com/ques... 

How to write inline if statement for print?

...hon doesn't have a trailing if, then why does this work: print [i for i in range(10) if i%2]? I wish they'd allow it outside of comprehensions... – mbomb007 Sep 26 '15 at 22:13 ...
https://stackoverflow.com/ques... 

How do I split a multi-line string into multiple lines?

... It is strange that this answer is so upvoted. Hard coding '\n' is a bad idea, but even if you use os.linesep instead of that, you will have issues with windows line ends on Linux and vice versa, etc. Moreover, it is promoting splitli...
https://stackoverflow.com/ques... 

Remove specific characters from a string in Python

...hon regular expression documentation: Characters that are not within a range can be matched by complementing the set. If the first character of the set is '^', all the characters that are not in the set will be matched. For example, [^5] will match any character except '5', and [^^] will m...
https://stackoverflow.com/ques... 

How to iterate through SparseArray?

... the documentation states that "keyAt(int index) Given an index in the range 0...size()-1, returns the key from the indexth key-value mapping that this SparseArray stores." so it works fine for me even for the case described by you. – Ruzanna Mar 3 '12 at 1...