大约有 5,881 项符合查询结果(耗时:0.0167秒) [XML]

https://stackoverflow.com/ques... 

How to create a responsive image that also scales up in Bootstrap 3

...option, here's an alternative solution. Having a parent div with display: table & table-layout: fixed. Then setting the image to display: table-cell and max-width to 100%. That way the image will fit to the width of its parent. Example: <style> .wrapper { float: left; clear: left; d...
https://stackoverflow.com/ques... 

sqlalchemy unique across multiple columns

... UniqueConstraint or Index constructs explicitly. As these belong to a Table and not to a mapped Class, one declares those in the table definition, or if using declarative as in the __table_args__: # version1: table definition mytable = Table('mytable', meta, # ... Column('customer_id',...
https://stackoverflow.com/ques... 

Is there a version control system for database structure changes?

...the version (such as removing a column). Each migration is numbered, and a table keeps track of your current db version. To migrate up, you run a command called "db:migrate" which looks at your version and applies the needed scripts. You can migrate down in a similar way. The migration scripts the...
https://stackoverflow.com/ques... 

Entity Framework vs LINQ to SQL

... LINQ to SQL only supports 1 to 1 mapping of database tables, views, sprocs and functions available in Microsoft SQL Server. It's a great API to use for quick data access construction to relatively well designed SQL Server databases. LINQ2SQL was first released with C# 3.0 and...
https://stackoverflow.com/ques... 

How many concurrent AJAX (XmlHttpRequest) requests are allowed in popular browsers?

...cript"> var _settimer; var _timer; var _waiting; $(function(){ clearTable(); $('#boton').bind('click', donow); }) function donow(){ var w; var estim = 0; _waiting = $('#total')[0].value * 1; clearTable(); for(var r=1;r<=_waiting;r++){ w = Math.floor(Math.random()*6)+2; ...
https://stackoverflow.com/ques... 

What is NSLayoutConstraint “UIView-Encapsulated-Layout-Height” and how should I go about forcing it

I have a UITableView running under iOS 8 and I'm using automatic cell heights from constraints in a storyboard. 17 Answer...
https://stackoverflow.com/ques... 

jQuery - Get Width of Element when Not Visible (Display: None)

... visible width() returns 0. Makes sense, but I need to get the width of a table in order to set the width of the parent before I show the parent. ...
https://stackoverflow.com/ques... 

How to know when UITableView did scroll to bottom in iPhone

I would like to know when a UITableView did scroll to bottom in order to load and show more content, something like a delegate or something else to let the controller know when the table did scroll to bottom. ...
https://stackoverflow.com/ques... 

SQL join on multiple columns in same tables

... subqueries, but I'm having trouble joining columns together from the same tables. I tried: 2 Answers ...
https://stackoverflow.com/ques... 

Auto Generate Database Diagram MySQL [closed]

... every project. Is there a tool out there that will let me select specific tables and then create a database diagram for me based on a MySQL database? Preferably it would allow me to edit the diagram afterward since none of the foreign keys are set... ...