大约有 20,200 项符合查询结果(耗时:0.0443秒) [XML]
Assigning default value while creating migration file
Ok I use above line to create migration file that automatically generates code in the generated file to add a column to a model Tweet with datatype integer. Now I want to add default value to the added column while generating the migration file. Is that possible? I googled it but couldn't find. Guys...
Prevent ViewPager from destroying off-screen views
I have a ViewPager hooked up to a FragmentPagerAdapter that's displaying three fragments. The ViewPager appears to destroy a hosted fragment's view when it is more than one swipe away from the current position.
...
Unittest setUp/tearDown for several tests
Is there a function that is fired at the beginning/end of a scenario of tests? The functions setUp and tearDown are fired before/after every single test.
...
Postgresql: Conditionally unique constraint
I'd like to add a constraint which enforces uniqueness on a column only in a portion of a table.
2 Answers
...
What's the longest possible worldwide phone number I should consider in SQL varchar(length) for phon
What's the longest possible worldwide phone number I should consider in SQL varchar(length) for phone.
5 Answers
...
How do I convert struct System.Byte byte[] to a System.IO.Stream object in C#?
How do I convert struct System.Byte byte[] to a System.IO.Stream object in C# ?
4 Answers
...
how to get program files x86 env variable?
I would like to know how I can display the location of Program Files (x86) in command prompt. I'm using Windows 7 64bit.
4...
Difference between GeoJSON and TopoJSON
What is the difference between GeoJSON and TopoJSON and when would I use one over the other?
3 Answers
...
Fastest hash for non-cryptographic uses?
I'm essentially preparing phrases to be put into the database, they may be malformed so I want to store a short hash of them instead (I will be simply comparing if they exist or not, so hash is ideal).
...
Git: copy all files in a directory from another branch
How do I copy all files in a directory from another branch? I can list all of the files in that directory by doing
2 Answe...