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Truncating all tables in a Postgres database
... SELECT tablename FROM pg_tables
WHERE tableowner = username AND schemaname = 'public';
BEGIN
FOR stmt IN statements LOOP
EXECUTE 'TRUNCATE TABLE ' || quote_ident(stmt.tablename) || ' CASCADE;';
END LOOP;
END;
$$ LANGUAGE plpgsql;
This creates a stored function (you n...
Difference between jQuery parent(), parents() and closest() functions
...ches the selector, up
from the DOM tree. Begins from the current element and travels up.
parent() selects one element up (single level up) the DOM tree.
parents() method is similar to parent() but selects all the
matching elements up the DOM tree. Begins from the parent element and tr...
Using awk to remove the Byte-order mark
... So: awk '{if(NR==1)sub(/^\xef\xbb\xbf/,"");print}' INFILE > OUTFILE and make sure INFILE and OUTFILE are different!
– Steve Clay
Feb 12 '10 at 20:30
1
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Multiple queries executed in java in single statement
...c.. Acceptable values for allowMultiQueries property are true, false, yes, and no. Any other value is rejected at runtime with an SQLException.
String dbUrl = "jdbc:mysql:///test?allowMultiQueries=true";
Unless such instruction is passed, an SQLException is thrown.
You have to use execute( S...
What does it mean by buffer?
...
Imagine that you're eating candy out of a bowl. You take one piece regularly. To prevent the bowl from running out, someone might refill the bowl before it gets empty, so that when you want to take another piece, there's candy in the bowl.
The bowl ac...
How do I define and use an ENUM in Objective-C?
I declared an enum in my implementation file as shown below, and declared a variable of that type in my interface as PlayerState thePlayerState; and used the variable in my methods. But I am getting errors stating that it is undeclared. How do I correctly declare and use a variable of type PlayerSta...
Visual Studio TFS shows unchanged files in the list of pending changes
... a file in pending changes window. I try to compare it with latest version and I get an a message 'The files are identical' If the files are identical why is this file showing up in pending changes window? What changed about this file? Can I configure TFS not to list files that are identical?
...
is_null($x) vs $x === null in PHP [duplicate]
PHP has two (that I know of, and three if you count isset() ) methods to determine if a value is null: is_null() and === null . I have heard, but not confirmed, that === null is faster, but in a code review someone strongly suggested that I use is_null() instead as it is specifically design...
Pros and Cons of SQLite and Shared Preferences [closed]
What is the good mechanism to store information among SQLite database and Shared Preferences?
5 Answers
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How to implement onBackPressed() in Fragments?
Is there a way in which we can implement onBackPressed() in Android Fragment similar to the way in which we implement in Android Activity?
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