大约有 41,000 项符合查询结果（耗时：0.0641秒） [XML]
Why can't variable names start with numbers?
I was working with a new C++ developer a while back when he asked the question: "Why can't variable names start with numbers?"
...
Representing null in JSON
What is the preferred method for returning null values in JSON? Is there a different preference for primitives?
7 Answers
...
Calling Python in Java?
...ng if it is possible to call python functions from java code using jython, or is it only for calling java code from python?
...
Typing Enter/Return key using Python and Selenium?
I'm looking for a quick way to type and Enter or Return key in Selenium. Unfortunately the form I'm trying to test (not my own code so I can't modify) doesn't have a Submit button. When working with it manually, I just type ENTER or RETURN . I need to know how to do that with the Selenium type ...
Regular Expression to find a string included between two characters while EXCLUDING the delimiters
...asy done", LOL! :) Regular expressions always give me headache, I tend to forget them as soon as I find the ones that solve my problems. About your solutions: the first works as expected, the second doesn't, it keeps including the brackets. I'm using C#, maybe the RegEx object has its own "flavour"...
Uses for Optional
Having been using Java 8 now for 6+ months or so, I'm pretty happy with the new API changes. One area I'm still not confident in is when to use Optional . I seem to swing between wanting to use it everywhere something may be null , and nowhere at all.
...
Is False == 0 and True == 1 an implementation detail or is it guaranteed by the language?
...ue == 1 , in Python (assuming that they are not reassigned by the user)? For instance, is it in any way guaranteed that the following code will always produce the same results, whatever the version of Python (both existing and, likely, future ones)?
...
Checkout another branch when there are uncommitted changes on the current branch
...ave some uncommitted changes on the current branch. So I'll have to commit or stash those changes first.
5 Answers
...
Which characters need to be escaped in HTML?
...uce the chance of making a mistake.
If your document encoding does not support all of the characters that you're using, such as if you're trying to use emoji in an ASCII-encoded document, you also need to escape those. Most documents these days are encoded using the fully Unicode-supporting UTF-8 en...
How to check whether a string is Base64 encoded or not
I want to decode a Base64 encoded string, then store it in my database. If the input is not Base64 encoded, I need to throw an error.
...