unique
iOS Core Data unique object fetch
I\'m fairly new to iOS/Cocoa and I have a very fundamental question about core data. I was looking over the internet to find a appropriate answer/solution but I wasn\'t able to.[详细]
2023-04-02 15:51 分类：问答XML Schema - Unique attribute value + parent attribute value
Wanting to write a schema that tests to see if the combination of an attribute + the parent node attribute is unique.[详细]
2023-03-31 13:40 分类：问答print out unique lines in Perl
I\'ve been challenged with a mathematics problem. Given ten numbers (in this case, numbers from 1 to 10), how many unique combinations of six numbers are there? The short answer is 210. However, I wou[详细]
2023-03-31 10:21 分类：问答Creating a unique random 5 character slug
Hi I have a function that will generate a random string which works fine. What I would like to do is store that string as the pr开发者_如何学Goimary key in my database. The problem is that I first nee[详细]
2023-03-29 11:55 分类：问答Identifying an Android device / an installation (without physical ID)
The problem: In one of my Android apps, users should be allowed to make changes to text data on my server (via HTTP request) without being required to login or sign up.[详细]
2023-03-29 06:04 分类：问答How does MySQL handle compound unique indexes with limited lengths?
Assuming two columns in a MySQL (MyISAM) table: title VARCHAR(1500) url VARCHAR(155) I want to create a composite unique index on both columns. I know of the limiting length feature for too long co[详细]
2023-03-29 04:50 分类：问答ORA-00001: unique constraint (DEV.X_PK) violated
I have a java code that sends data to a web service, and a portlet that uses that data. Data sent by java agent gets placed in TMP table, and merge procedure merges it into MAIN table used by portle[详细]
2023-03-28 04:46 分类：问答XSD schema attempt to make attribute value unique
I have been trying to use xs:unique with no success so far. I have the following simple schema: <?xml version=\"1.0\" encoding=\"utf-8\"?>[详细]
2023-03-27 15:54 分类：问答Android: ListView with Unique rows
Is it possible to create a ListView where each row in the list is a unique layout (you do not know the layout structure because it is dynamically generated at run time)?[详细]
2023-03-26 20:09 分类：问答Can mySQL define specific columns as UNIQUE based on another column?
Suppose I have a table: CREATE TABLE `ml_vendor_refs` ( `id` int(11) NOT NULL AUTO_INCREMENT, `ml_id` int(11) NOT NULL,[详细]
2023-03-25 23:22 分类：问答
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