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Check a collection size with JSTL
...urns the number of items in a collection, or the number of characters in a string.
Put this at the top of JSP page to allow the fn namespace:
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
Or if you're using JSPX or Facelets:
<... xmlns:fn="http://java.sun.com/jsp/...
How to get the Parent's parent directory in Powershell?
...lping hand here.
(get-item $scriptPath ).parent.parent
If you Want the string only
(get-item $scriptPath ).parent.parent.FullName
Version for a file
If $scriptPath points to a file then you have to call Directory property on it first, so the call would look like this
(get-item $scriptPath)....
Iterate through a HashMap [duplicate]
...
The for (Map.Entry<String, Object> cursor : map.entrySet()) {...} syntax is much better.
– Chad Okere
Jan 28 '12 at 17:29
...
How do I get the file extension of a file in Java?
...le of how to use it (you may specify either full path or just file name):
String ext1 = FilenameUtils.getExtension("/path/to/file/foo.txt"); // returns "txt"
String ext2 = FilenameUtils.getExtension("bar.exe"); // returns "exe"
Maven dependency:
<dependency>
<groupId>commons-io<...
How to get the current loop index when using Iterator?
...and found using a ListIterator worked. Similar to the test above:
List<String> list = Arrays.asList("zero", "one", "two");
ListIterator iter = list.listIterator();
while (iter.hasNext()) {
System.out.println("index: " + iter.nextIndex() + " value: " + iter.next());
}
Make sure you cal...
Questions every good Java/Java EE Developer should be able to answer? [closed]
...using final qualifier for the method parameter.
class Name {
private String name;
public Name (String s) {
this.name = s;
}
public void setName(String s) {
this.name = s;
}
}
private void test (final Name n) {
n.setName("test");
}
...
Releasing memory in Python
...sually deallocates at least two things at the next level down (e.g., for a string, you're releasing the PyString object, and the string buffer).
If you do deallocate an object, to know whether this causes the next level down to deallocate a block of object storage, you have to know the internal st...
Get String in YYYYMMDD format from JS date object?
I'm trying to use JS to turn a date object into a string in YYYYMMDD format. Is there an easier way than concatenating Date.getYear() , Date.getMonth() , and Date.getDay() ?
...
Can you explain the HttpURLConnection connection process?
...
String message = URLEncoder.encode("my message", "UTF-8");
try {
// instantiate the URL object with the target URL of the resource to
// request
URL url = new URL("http://www.example.com/comment");
// instan...
What exactly is an “open generic type” in .NET? [duplicate]
...e that is not an open type.
Therefore T, List<T>, and Dictionary<string,T>, and Dictionary<T,U> are all open types (T and U are type arguments) whereas List<int> and Dictionary<string,int> are closed types.
There's a related concept: An unbound generic type is a generi...