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What's the (hidden) cost of Scala's lazy val?
One handy feature of Scala is lazy val , where the evaluation of a val is delayed until it's necessary (at first access).
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background function in Python
...mes displays images to the user. The images can, at times, be quite large, and they are reused often. Displaying them is not critical, but displaying the message associated with them is. I've got a function that downloads the image needed and saves it locally. Right now it's run inline with the code...
Passing by reference in C
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Because you're passing the value of the pointer to the method and then dereferencing it to get the integer that is pointed to.
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Update one MySQL table with values from another
...ue = original.value)
SET tobeupdated.id = original.id
That should do it, and really its doing exactly what yours is. However, I prefer 'JOIN' syntax for joins rather than multiple 'WHERE' conditions, I think its easier to read
As for running slow, how large are the tables? You should have indexes...
SQLite in Android How to update a specific row
I've been trying to update a specific row for a while now, and it seems that there are two ways to do this. From what I've read and tried, you can just use the:
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How do I use su to execute the rest of the bash script as that user?
...that takes, as an argument, a string that is a concatenation of a username and a project. The script is supposed to switch (su) to the username, cd to a specific directory based upon the project string.
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How to make an Android device vibrate?
I wrote an Android application. Now, I want to make the device vibrate when a certain action occurs. How can I do this?
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Calculating arithmetic mean (one type of average) in Python
Is there a built-in or standard library method in Python to calculate the arithmetic mean (one type of average) of a list of numbers?
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Set default syntax to different filetype in Sublime Text 2
...the menu bar. Open a file with the extension you want to set a default for and navigate through the following menus: View -> Syntax -> Open all with current extension as... ->[your syntax choice].
Updated 2012-06-28: Recent builds of Sublime Text 2 (at least since Build 2181) have allowed ...
urllib2.HTTPError: HTTP Error 403: Forbidden
... answered Nov 9 '12 at 7:19
andreanandrean
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