You want closures. How you want closures ... that's going to be based on what you're doing. If you want more help, you're going to need to give a few examples of data and the actions you'd want to take on them. Then, one of us might be able to point you in the right direction.

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We are the carpenters and bricklayers of the Information Age.

Don't go borrowing trouble. For programmers, this means Worry only about what you need to implement.