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Difference between “@id/” and “@+id/” in Android

In @+id/ the plus symbol + instructs to create a new resource name and add in to the R.java file but what about @id/ ? From the documentation of ID : when referencing an Android resource ID , you do not need the plus symbol, but must add the android package namespace, like so: ...
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How to get ID of the last updated row in MySQL?

How do I get the ID of the last updated row in MySQL using PHP? 12 Answers 12 ...
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How to jQuery clone() and change id?

I need to clone the id and then add a number after it like so id1 , id2 , etc. Everytime you hit clone you put the clone after the latest number of the id. ...
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How to create a MySQL hierarchical recursive query

...: use the recursive with syntax. For MySQL 5.x: use inline variables, path IDs, or self-joins. MySQL 8+ with recursive cte (id, name, parent_id) as ( select id, name, parent_id from products where parent_id = 19 union all select p.id, ...
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MySQL JOIN the most recent row only?

I have a table customer that stores a customer_id, email and reference. There is an additional table customer_data that stores a historical record of the changes made to the customer, i.e. when there's a change made a new row is inserted. ...
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SQL query return data from multiple tables

...e know what colors we have in the car yard. mysql> create table colors(id int(3) not null auto_increment primary key, -> color varchar(15), paint varchar(10)); Query OK, 0 rows affected (0.01 sec) mysql> show columns from colors; +-------+-------------+------+-----+---------+--------...
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ActiveRecord.find(array_of_ids), preserving order

When you do Something.find(array_of_ids) in Rails, the order of the resulting array does not depend on the order of array_of_ids . ...
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SQL Server query to find all permissions/access for all users in a database

...at a query, based on Andomar's suggestions. This query is intended to provide a list of permissions that a user has either applied directly to the user account, or through roles that the user has. /* Security Audit Report 1) List all access provisioned to a sql user or windows user/group directly ...
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How can I assign an ID to a view programmatically?

In an XML file, we can assign an ID to a view like android:id="@+id/something" and then call findViewById() , but when creating a view programmatically, how do I assign an ID? ...
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Naming of ID columns in database tables

I was wondering peoples opinions on the naming of ID columns in database tables. 24 Answers ...