constraints

Need to implement functionality similar to what dotdotdot jQuery plugin does but cannot use javascript frameworks (like jquery or ext). Is there any easy way to add the dots to the content of div or span element if content takes more space then element should??? (similar to what css overflow: ellipsis setting does) Can't use ellipsis beacause it doesn't work with many lines when height is limited. Thank you :) Why not using the CSS property text-overflow? It works great as long as you define a width in your tag. Class in CSS: .clipped { overflow: hidden; white-space: nowrap; text-overflow:

The Problem Here's the essence of the problem I want to solve. We have workers taking care of children in a nursery for set times during the weekend. There's 16 different slots to fill in one weekend. So for a 4-week month there's 64 slots to fill. We have at max 30 nursery workers (though we need much more. anybody like kids?). EDIT: Each time slot is discrete - they don't overlap. Currently there's a person who comes up with the nursery schedule each month. It's a complex and time consuming task to make this schedule every month with everybody's preferences. After considering the problem I

Say I have two tables, user and comment . They have table definitions that look like this: CREATE TABLE `user` ( `id` INTEGER NOT NULL AUTO_INCREMENT, `username` VARCHAR(255) NOT NULL, `deleted` TINYINT(1) NOT NULL DEFAULT 0, PRIMARY KEY (`id`), UNIQUE KEY (`username`) ) ENGINE=InnoDB; CREATE TABLE `comment` ( `id` INTEGER NOT NULL AUTO_INCREMENT, `user_id` INTEGER NOT NULL, `comment` TEXT, `deleted` TINYINT(1) NOT NULL DEFAULT 0, PRIMARY KEY (`id`), CONSTRAINT `fk_comment_user_id` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`) ON DELETE CASCADE ON UPDATE CASCADE ) ENGINE=InnoDB; This is

What are good ways to add a constraint to PostgreSQL to check that exactly one column (from a set of columns) contains a non-null value? Update : It is likely that I want to use a check expression as detailed in Create Table and Alter Table . Update : I'm looking through the available functions . Update : Just for background, here is the Rails validation logic I'm currently using: validate :multi_column_validation def multi_column_validation n = 0 n += 1 if column_1 n += 1 if column_2 n += 1 if column_3 unless 1 == n errors.add(:base, "Exactly one column from " + "column_1, column_2, column_3

I am curious to know is it possible to create a conditional not null constraint in sql? In otherwords is it possible to create a constraint such that a column B can be null as long column A contains lets say 'NEW' but if the contents of column A changes to something else then column B is no longer allowed to be null? And to extend on that, it is then possible to make it so that column B must be null or empty as long as column A says 'NEW'? Thanks All :D This is perfectly fine for CONSTRAINT CHECK. Just do this: Requirement: is it possible to create a constraint such that a column B can be null

Currently i have a collection view which takes up most of my screen at the 3.5 inch screen size.The collection view is 51 pixels from the top and 20 pixels from the bottom of the screen. I am using the cells with UIPageControl to create a paged layout, with one cell per page. When switching to the 4 inch size, using constraints i can get the collection view to expand into the new space (maintaining the 51 pixels from the top and 20 from bottom), but the cell size stays the same, so now there is a bunch of empty space at the top and bottom of the cell. I tried using constraints, but it appears