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Center a popup window on screen?
...At this rate, we will have an answer for 5 monitors in 2020, 6 monitors in 2025, 7 monitors in 2030... let's keep this cycle going!
– Tony M
Mar 20 '15 at 20:34
2
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Limiting the number of records from mysqldump?
...ault to and advise "id" for PK-columns, since it is redundant to say users.user_id instead of just users.id.
– Andreas Bergström
Nov 23 '17 at 8:50
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H2 in-memory database. Table not found
...KEY, FIRSTNAME VARCHAR(64), LASTNAME VARCHAR(64))");
PreparedStatement ps=connection.prepareStatement("select * from PERSON");
ResultSet r=ps.executeQuery();
if(r.next()) {
System.out.println("data?");
}
r.close();
ps.close();
s.close();
connection.close();
}
...
Is there an equivalent of 'which' on the Windows command line?
... tries the unadorned command then each of the extension ones. Hope that helps. You can tweak it to your needs as you see fit (if you want the same search order as with Windows for example - this one shows all possibilities).
– paxdiablo
Mar 26 '10 at 1:34
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how to permit an array with strong parameters
...y
params.require(:question).permit(:question_details, :question_content, :user_id, :accepted_answer_id, :province_id, :city, :category_ids => [])
Works perfectly now!
(IMPORTANT: As @Lenart notes in the comments, the array declarations must be at the end of the attributes list, otherwise you'...
delete_all vs destroy_all?
...l
You can do :
u = User.find_by_name('JohnBoy')
UsageIndex.destroy_all "user_id = #{u.id}"
The result is one query to destroy all the associated records
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What is the meaning of the CascadeType.ALL for a @ManyToOne JPA association
...dresses {
@ManyToOne(cascade = CascadeType.REFRESH) @JoinColumn(name = "user_id")
protected User addressOwner;
}
This way you dont need to worry about using fetch in annotations. But remember when deleting the User you will also delete connected address to user object.
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How to make pipes work with Runtime.exec()?
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I ran into a similar problem in Linux, except it was "ps -ef | grep someprocess".
At least with "ls" you have a language-independent (albeit slower) Java replacement. Eg.:
File f = new File("C:\\");
String[] files = f.listFiles(new File("/home/tihamer"));
for (String file : fi...
Best practice for instantiating a new Android Fragment
....
This approach is also documented in the android developer reference: https://developer.android.com/reference/android/app/Fragment.html
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Does SQLAlchemy have an equivalent of Django's get_or_create?
...s, it is automatically added to the session. E.g. create a book, which has user_id and user as corresponding relationship, then doing book.user=<user object> inside of create_method will add book to the session. This means that create_method must be inside with to benefit from an eventual roll...