Hi All,
I'd like to propose adding a new utility method slice() to Apache Commons
Lang that brings Python-style slicing capabilities to Java for Collections,
arrays (primitive and wrapper types), and String.
The proposed method would follow the form: *slice(input, start, end, step)*
This would be a highly reusable utility that simplifies what is currently
verbose or error-prone logic in standard Java. It could live in a new class
like *SliceUtils *or be integrated into existing utility classes such
as *ArrayUtils
*and *StringUtils*.
*Highlights:*
1) Supports positive and negative indices for start,end and step
2) Works on Collections, Arrays and Strings
*Examples:*
List<String> names = Arrays.asList("Hello","Hi","Bye");
SliceUtils.slice(names, 0,2); // returns ["Hello", "Hi"]
String s = "abcdef";
SliceUtils.slice(s, 1, 4); // returns "bcd"
int[] numbers = {1, 2, 3, 4, 5, 6};
SliceUtils.slice(numbers, 0, -1, 2); // returns [1, 3, 5]
If the community agrees this is in scope for Commons Lang, I’d be happy to
implement the feature with full test coverage and documentation.
Looking forward to your thoughts.
Regards,
Yokesh
[bollineniyok...@gmail.com]
