大约有 43,000 项符合查询结果（耗时：0.0689秒） [XML]
Check that an email address is valid on iOS [duplicate]
I am developing an iPhone application where I need the user to give his email address at login.
4 Answers
...
Is it fine to have foreign key as primary key?
I have two tables:
8 Answers
8
...
Is it possible for a computer to “learn” a regular expression by user-provided examples?
Is it possible for a computer to "learn" a regular expression by user-provided examples?
10 Answers
...
What's the -practical- difference between a Bare and non-Bare repository?
I've been reading about the bare and non-bare / default repositores in Git. I haven't been able to understand quite well (theoretically) about the differences between them, and why I should "push" to a bare repository. Here's the deal:
...
Default implementation for Object.GetHashCode()
How does the default implementation for GetHashCode() work? And does it handle structures, classes, arrays, etc. efficiently and well enough?
...
What does tree-ish mean in Git?
I'm very confused about how to use git archive .
6 Answers
6
...
How to change a module variable from another module?
Suppose I have a package named bar , and it contains bar.py :
3 Answers
3
...
How unique is UUID?
How safe is it to use UUID to uniquely identify something (I'm using it for files uploaded to the server)? As I understand it, it is based off random numbers. However, it seems to me that given enough time, it would eventually repeat it self, just by pure chance. Is there a better system or a patter...
Is an empty href valid?
One of our web developers uses the following html as a placeholder for styling a drop down list.
10 Answers
...
Does a foreign key automatically create an index?
I've been told that if I foreign key two tables, that SQL Server will create something akin to an index in the child table. I have a hard time believing this to be true, but can't find much out there related specifically to this.
...