大约有 16,000 项符合查询结果（耗时：0.0223秒） [XML]
Class method differences in Python: bound, unbound and static
What is the difference between the following class methods?
13 Answers
13
...
Does MySQL ignore null values on unique constraints?
I have an email column that I want to be unique. But I also want it to accept null values. Can my database have 2 null emails that way?
...
JavaScript click event listener on class
I'm currently trying to write some JavaScript to get the attribute of the class that has been clicked. I know that to do this the correct way, I should use an event listener.
My code is as follows:
...
How does password salt help against a rainbow table attack?
I'm having some trouble understanding the purpose of a salt to a password. It's my understanding that the primary use is to hamper a rainbow table attack. However, the methods I've seen to implement this don't seem to really make the problem harder.
...
DLL and LIB files - what and why?
I know very little about DLL's and LIB's other than that they contain vital code required for a program to run properly - libraries. But why do compilers generate them at all? Wouldn't it be easier to just include all the code in a single executable? And what's the difference between DLL's and LIB's...
Generating a drop down list of timezones with PHP
...ed some way to show the dates on the site in the users preferred timezone. Below are two lists that I found and then one method using the built in PHP DateTime class in PHP 5.
...
Is it possible to make relative link to image in a markdown file in a gist?
...
As of now, relative image links are working for me, in both a repository and a wiki. I'm using syntax like this:
Here's an example:
https://github.com/mark-anders/relative-image-url
...
How do I add a submodule to a sub-directory?
I have a git repo in ~/.janus/ with a bunch of submodules in it. I want to add a submodule in ~/.janus/snipmate-snippets/snippets/ , but when I run git submodule add <git@github.com:...> in the snipmate-snippets directory, I get the following error message:
...
moving changed files to another branch for check-in
...me code, go to check in my changes, and then realize I'm not in the proper branch to check in those changes. However I can't switch to another branch without my changes reverting. Is there a way to move changes to another branch to be checked in there?
...
Definition of “downstream” and “upstream”
...d have come across the terms "upstream" and "downstream". I've seen these before but never understood them fully. What do these terms mean in the context of SCMs ( Software Configuration Management tools) and source code?
...