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Storing a Map using JPA
...ns.
Something like this should work:
@Entity
public class Example {
@Id long id;
// ....
@ElementCollection
@MapKeyColumn(name="name")
@Column(name="value")
@CollectionTable(name="example_attributes", joinColumns=@JoinColumn(name="example_id"))
Map<String, String>...
Android: Go back to previous activity
I want to do something simple on android app.
How is it possible to go back to a previous activity.
23 Answers
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Populating a database in a Laravel migration file
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Don't put the DB::insert() inside of the Schema::create(), because the create method has to finish making the table before you can insert stuff. Try this instead:
public function up()
{
// Create the table
Schema::create('users', function($table)...
MQTT物联网协议完全实践指南 · App Inventor 2 中文网
...践
主题命名规范：
{namespace}/{device_type}/{device_id}/{attribute}/{action}
示例：
home/thermostat/livingroom/temperature/set
office/light/meeting_room/brightness/get
factory/sensor/machine_001/status/online
通配符使用规则：
// 单级通配符匹配
call UrsPahoM...
How to strip all non-alphabetic characters from string in SQL Server?
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I knew that SQL was bad at string manipulation, but I didn't think it would be this difficult. Here's a simple function to strip out all the numbers from a string. There would be better ways to do this, but this is a start.
CREATE FUNCTION dbo.AlphaOnly (
@String varchar(100...
LINQ Single vs First
...table that stores Customers in different languages using a Composite Key ( ID, Lang ):
DBContext db = new DBContext();
Customer customer = db.Customers.Where( c=> c.ID == 5 ).First();
This code above introduces a possible logic error ( difficult to trace ). It will return more than one record ( ...
React JSX: selecting “selected” on selected option
...ist.List is opening but when i select one of them it select value item.Any idea ?
– user1924375
May 2 '15 at 17:59
5
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Click outside menu to close in jquery
...enu that shows on a click, as per business requirements. The menu becomes hidden again after you mouse away from it.
15 Ans...
How can I shrink the drawable on a button?
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You should use a ImageButton and specify the image in android:src, and set android:scaletype to fitXY
Setting scaled drawable in code
Drawable drawable = getResources().getDrawable(R.drawable.s_vit);
drawable.setBounds(0, 0, (int)(drawable.getIntrinsicWidth()*0.5),
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Label on the left side instead above an input field
... would like to have the labels not above the input field, but on the left side.
15 Answers
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