A nice way to avoid code duplication and gain in readability:

Generate lambdas for clarity and performance

by Björn Fahller

From the article:

Higher order functions, functions that operate on other functions or returns functions, are familiar to those who have had some experience with functional programming, but they often seems magical to those who have not. Some of those with experience of using higher order functions have a gut feeling that they are expensive to use and prefer to avoid them...