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How to delete a folder with files using Java
... files before deleting the folder.
Use something like:
String[]entries = index.list();
for(String s: entries){
File currentFile = new File(index.getPath(),s);
currentFile.delete();
}
Then you should be able to delete the folder by using index.delete()
Untested!
...
Is this a “good enough” random algorithm; why isn't it used if it's faster?
I made a class called QuickRandom , and its job is to produce random numbers quickly. It's really simple: just take the old value, multiply by a double , and take the decimal part.
...
MySQL “NOT IN” query
...ribution, number of values in both tables etc., as long as both fields are indexed. Since there are three pieces of code in MySQL that essentialy do one job, it is possible that the code responsible for EXISTS makes some kind of an extra check which takes extra time.
[…]
MySQL can optimize a...
How to use a class from one C# project with another C# project
...projects together in the same solution space?
You have to go to both the indexer or "intellisense" options and the compiler/interpreter and physically check or change/add the directory path statements if they are something other than what points to your "second" project or solution space. When yo...
Can you help me understand this? “Common REST Mistakes: Sessions are irrelevant”
...ature of HTTP.
Okay, I get that HTTP authentication
is done automatically on every message
- but how?
Yes, the username and password is sent with every request. The common methods to do so are basic access authentication and digest access authentication. And yes, an eavesdropper can capt...
Which is fastest? SELECT SQL_CALC_FOUND_ROWS FROM `table`, or SELECT COUNT(*)
...CALC_FOUND_ROWS?
Just a quick summary: Peter says that it depends on your indexes and other factors. Many of the comments to the post seem to say that SQL_CALC_FOUND_ROWS is almost always slower - sometimes up to 10x slower - than running two queries.
...
How to install packages offline?
... Instead of --allow-hosts=None you could use the switch --no-index
– romor
May 27 '15 at 15:46
Can you p...
Which CheckedListBox event triggers after a item is checked?
...= CheckState.Checked)
checkedItems.Add(checkedListBox1.Items[e.Index].ToString());
else
checkedItems.Remove(checkedListBox1.Items[e.Index].ToString());
foreach (string item in checkedItems)
{
...
}
}
As another example, to de...
WAMP error: Forbidden You don't have permission to access /phpmyadmin/ on this server
...al machine.
<Directory "c:/wamp/apps/phpmyadmin3.4.5/">
Options Indexes FollowSymLinks MultiViews
AllowOverride all
Order Deny,Allow
Allow from all
</Directory>
Here my WAMP installation is in the c:\wamp folder. Change it according to your installation.
Previ...
When do I need to use a semicolon vs a slash in Oracle SQL?
...ce, but I prefer to see scripts that consistently use the slash - this way all "units" of work (creating a PL/SQL object, running a PL/SQL anonymous block, and executing a DML statement) can be picked out more easily by eye.
Also, if you eventually move to something like Ant for deployment it will ...