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How to create a custom string representation for a class object?
...pace_C0wb0y: You could add a string like _representation to the class body and return self._representation in the __repr__() method of the metaclass.
– Sven Marnach
Feb 8 '11 at 12:50
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How to pop an alert message box using PHP?
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You could use Javascript:
// This is in the PHP file and sends a Javascript alert to the client
$message = "wrong answer";
echo "<script type='text/javascript'>alert('$message');</script>";
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Facebook Graph API, how to get users email?
...ended permissions on the email field. The user must allow you to see this and you cannot get the e-mail addresses of the user's friends.
http://developers.facebook.com/docs/authentication/permissions
You can do this if you are using Facebook connect by passing scope=email in the get string of you...
What does “Splats” mean in the CoffeeScript tutorial?
... arguments. Splatted arguments can come either before, after, or between standard arguments:
(first, rest...) ->
(rest..., last) ->
(first, rest..., last) ->
In the first two cases, if the function receives 0-1 arguments, rest will be an empty array. In the last case, the function needs ...
Parse (split) a string in C++ using string delimiter (standard C++)
...npos) function returns a substring of the object, starting at position pos and of length npos.
If you have multiple delimiters, after you have extracted one token, you can remove it (delimiter included) to proceed with subsequent extractions (if you want to preserve the original string, just use...
Left align two graph edges (ggplot)
I'm using ggplot and have two graphs that I want to display on top of each other. I used grid.arrange from gridExtra to stack them. The problem is I want the left edges of the graphs to align as well as the right edges regardless of axis labels. (the problem arises because the labels of one gra...
php static function
...() is actually an instance method which you are calling as a static method and you get away with it because sayHi() never refers to $this.
Static functions are associated with the class, not an instance of the class. As such, $this is not available from a static context ($this isn't pointing to any...
Java FileOutputStream Create File if not exists
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It will throw a FileNotFoundException if the file doesn't exist and cannot be created (doc), but it will create it if it can. To be sure you probably should first test that the file exists before you create the FileOutputStream (and create with createNewFile() if it doesn't):
File yourFi...
How to set the style -webkit-transform dynamically using JavaScript?
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The JavaScript style names are WebkitTransformOrigin and WebkitTransform
element.style.webkitTransform = "rotate(-2deg)";
Check the DOM extension reference for WebKit here.
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updating table rows in postgres using subquery
...ubquery
WHERE dummy.address_id=subquery.address_id;
This syntax is not standard SQL, but it is much more convenient for this type of query than standard SQL. I believe Oracle (at least) accepts something similar.
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