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Copying files from one directory to another in Java
... FileUtils.copyDirectory(source, dest);
} catch (IOException e) {
e.printStackTrace();
}
FileUtils class from apache commons-io library, available since version 1.2.
Using third party tools instead of writing all utilities by ourself seems to be a better idea. It can save time and other valu...
jQuery document.createElement equivalent?
... You'll find that document.createElement is much faster than having jQuery convert your html string into an element. (just in case you have an urge to make things more efficient)
– Sugendran
Nov 7 '08 at 7:19
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How do I prevent the modification of a private field in a class?
...:
public String [] getArr ()
{
return arr.clone ();
}
or to
public int getArrLength ()
{
return arr.length;
}
public String getArrElementAt (int index)
{
return arr [index];
}
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How do I split a multi-line string into multiple lines?
...in text mode partially mitigates the newline representation problem, as it converts Python's \n into the platform's newline representation.
However, text mode only exists on Windows. On Unix systems, all files are opened in binary mode, so using split('\n') in a UNIX system with a Windows file will...
How to load images dynamically (or lazily) when users scrolls them into view
...ing with the images that have already loaded)
Adding To Existing Code
To convert your html, in an editor just search and replace src=" with src="" data-src="
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How can I bring my application window to the front? [duplicate]
...ice behavior, here is code:
[DllImport("User32.dll")]
public static extern Int32 SetForegroundWindow(int hWnd);
SetForegroundWindow(Handle.ToInt32());
Update
David is completely right, for completeness I include the list of conditions that must apply for this to work (+1 for David!):
The proc...
Display numbers with ordinal suffix in PHP
...
PHP has built-in functionality for this. It even handles internationalization!
$locale = 'en_US';
$nf = new NumberFormatter($locale, NumberFormatter::ORDINAL);
echo $nf->format($number);
Note that this functionality is only available in PHP 5.3.0 and later.
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Reading header data in Ruby on Rails
...
Rails now attaches HTTP_ to the header as well as converting it to all caps so it would now be:
request.headers["HTTP_CONTENT_TYPE"]
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WHERE vs HAVING
...
If your calculated expression does not contain any aggregates, putting it into the WHERE clause will most probably be more efficient.
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Trimming a huge (3.5 GB) csv file to read into R
... rows (leading Access and SQL to choke). It's county level data set broken into segments, sub-segments, and sub-sub-segments (for a total of ~200 factors) for 40 years. In short, it's huge, and it's not going to fit into memory if I try to simply read it.
...