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Rails: Adding an index after adding column
Suppose I created a table table in a Rails app. Some time later, I add a column running:
5 Answers
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Javascript Equivalent to C# LINQ Select
Following this question here :
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MySQL ON DUPLICATE KEY - last insert id?
I have the following query:
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AJAX Mailchimp signup form integration
Is there any way to integrate mailchimp simple (one email input) with AJAX, so there is no page refresh and no redirection to default mailchimp page.
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Bootstrap 3: Keep selected tab on page refresh
I am trying to keep selected tab active on refresh with Bootstrap 3 . Tried and checked with some question already been asked here but none of work for me. Don't know where I am wrong. Here is my code
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Fragment is not being replaced but put on top of the previous one
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You are doing two things wrong here:
You cannot replace a fragment that is statically placed in an xml layout file. You should create a container (e.g. a FrameLayout) in the layout and then add the fragment programatically using Fra...
Drop all tables whose names begin with a certain string
How can I drop all tables whose names begin with a given string?
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Why is $$ returning the same id as the parent process?
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$$ is defined to return the process ID of the parent in a subshell; from the man page under "Special Parameters":
$ Expands to the process ID of the shell. In a () subshell, it expands to the process ID of the current shell,...
Select datatype of the field in postgres
How do I get datatype of specific field from table in postgres ?
For example
I have the following table,
student_details (
stu_id integer,
stu_name varchar(30 ),
joined_date timestamp
);
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How to persist a property of type List in JPA?
... does exactly what you need. There's one example here.
Edit
As mentioned in the comments below, the correct JPA 2 implementation is
javax.persistence.ElementCollection
@ElementCollection
Map<Key, Value> collection;
See: http://docs.oracle.com/javaee/6/api/javax/persistence/ElementCollect...