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How do I align views at the bottom of the screen?
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The modern way to do this is to have a ConstraintLayout and constrain the bottom of the view to the bottom of the ConstraintLayout with app:layout_constraintBottom_toBottomOf="parent"
The example below creates a FloatingActionButton that will be aligned to the end and t...
Adding elements to object
I need to populate a json file, now I have something like this:
17 Answers
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How do servlets work? Instantiation, sessions, shared variables and multithreading
Suppose, I have a webserver which holds numerous servlets. For information passing among those servlets I am setting session and instance variables.
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JPA: How to have one-to-many relation of the same Entity type
...on each end of the relationship is the same. The general case is detailed in Section 2.10.2 of the JPA 2.0 spec.
Here's a worked example. First, the entity class A:
@Entity
public class A implements Serializable {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private Long id;
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How can I use Spring Security without sessions?
I am building a web application with Spring Security that will live on Amazon EC2 and use Amazon's Elastic Load Balancers. Unfortunately, ELB does not support sticky sessions, so I need to ensure my application works properly without sessions.
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How to properly create composite primary keys - MYSQL
Here is a gross oversimplification of an intense setup I am working with. table_1 and table_2 both have auto-increment surrogate primary keys as the ID. info is a table that contains information about both table_1 and table_2 .
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How do I delete from multiple tables using INNER JOIN in SQL server
In MySQL you can use the syntax
13 Answers
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How to add/update an attribute to an HTML element using JavaScript?
I'm trying to find a way that will add / update attribute using JavaScript. I know I can do it with setAttribute() function but that doesn't work in IE.
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How to generate a new Guid in stored procedure?
I currently have a stored procedure in which I want to insert new rows into a table.
5 Answers
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SQLite UPSERT / UPDATE OR INSERT
I need to perform UPSERT / INSERT OR UPDATE against a SQLite Database.
7 Answers
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