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How to generate a random alpha-numeric string?
... buf[idx] = symbols[random.nextInt(symbols.length)];
return new String(buf);
}
public static final String upper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
public static final String lower = upper.toLowerCase(Locale.ROOT);
public static final String digits = "0123456789";
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Set value to NULL in MySQL
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Don't put NULL inside quotes in your update statement. This should work:
UPDATE table SET field = NULL WHERE something = something
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Where is the “Create Unit Tests” selection?
I have installed the new Visual Studio 2012 Ultimate.
9 Answers
9
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How do I position one image on top of another in HTML?
...orner of the blue square (but not tight in the corner). I am trying to avoid compositing (with ImageMagick and similar) due to performance issues.
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How to include() all PHP files from a directory?
..._name) {
require_once('classes/'.$class_name.'.class.php');
}
$user = new User();
Then whenever you call a new class that hasn't been included yet php will auto fire __autoload and include it for you
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Gradle does not find tools.jar
...look in the lib directory, you will see Tools.jar.
What I did I created a new environment variable JAVA_HOME:
And then you need to edit your PATH variable to include JAVA_HOME, i.e. %JAVA_HOME%/bin;
Re-open command prompt and should run.
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How can I create download link in HTML?
...pdf" target="_blank">Download</a>
the target=_blank will make a new browser window appear before the download starts. That window will usually be closed when the browser discovers that the resource is a file download.
Note that file types known to the browser (e.g. JPG or GIF images) wil...
What kind of virtual machine is BEAM (the Erlang VM)?
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It's relatively new which is why it doesn't have many upvotes. I upvoted it.
– Eric des Courtis
Sep 26 '17 at 20:11
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Why do we need message brokers like RabbitMQ over a database like PostgreSQL?
I am new to message brokers like RabbitMQ which we can use to create tasks / message queues for a scheduling system like Celery .
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Return HTTP status code 201 in flask
... For me this type of error handling worked (behind IIS) only if InvalidUsage was a child of werkzeug.exceptions.HTTPException, not a general Exception
– Gyula Sámuel Karli
Jun 15 at 9:36
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