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How to delete a folder with files using Java
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Be VERY careful. If index is a symbolic link to another directory, you'll wind up deleting the contents of the other directory. Unfortunately, I've not yet found a good way to detect symbolic links on Windows in Java 6, though Java 7 provide...
PHP Pass variable to next page
...the previous page, is completely unconnected with the current page. Except if you use something like sessions, cookies or GET / POST variables. Sessions and cookies are quite easy to use, with session being by far more secure than cookies. More secure, but not completely secure.
Session:
//On page...
SQL query to get all values a enum can have
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If you want an array:
SELECT enum_range(NULL::myenum)
If you want a separate record for each item in the enum:
SELECT unnest(enum_range(NULL::myenum))
Additional Information
This solution works as expected even if ...
What is the best workaround for the WCF client `using` block issue?
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You could easily modify the wrapper so you don't need a capture variable for the result. Something like this: public static TResult Use<TResult>(Func<T, TResult> codeBlock) { ... }
– chris
Aug ...
Check if a Postgres JSON array contains a string
...d')::jsonb ? 'carrots';
You can even index the ? query on the "food" key if you switch to the jsonb type instead:
alter table rabbits alter info type jsonb using info::jsonb;
create index on rabbits using gin ((info->'food'));
select info->>'name' from rabbits where info->'food' ? 'ca...
Setting Windows PowerShell environment variables
...nt variable affects only the old command prompt. PowerShell seems to have different environment settings. How do I change the environment variables for PowerShell (v1)?
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Check whether an array is empty [duplicate]
... quick workaround you can do following:
$errors = array_filter($errors);
if (!empty($errors)) {
}
array_filter() function's default behavior will remove all values from array which are equal to null, 0, '' or false.
Otherwise in your particular case empty() construct will always return true if ...
jQuery .scrollTop(); + animation
...t the page to scroll to top when a button is clicked. But first I used an if statement to see if the top of the page was not set to 0. Then if it's not 0 I animate the page to scroll to the top.
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Regular expression to match any character being repeated more than 10 times
...he same character being repeated more than 10 or so times. So for example, if I have a document littered with horizontal lines:
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Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)
... "127.0.0.1" the TCP/IP connector is used. You could try using "127.0.0.1" if the socket connector is not enabled/working.
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