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'''Once and only once''' is the practice of defining and describing something in a central place, and then referring to this in other places. It's especially helpful for things that are rapidly changing or complex.
'''Once and only once''' is the practice of defining and describing something in a central place, and then referring to this in other places. It's especially helpful for things that are rapidly changing or complex.
It is a rule of thumb in [[agile software development]]. A function should be defined in only one place, because it is easier to maintain that way. Even a few lines of code or one complex formula is better wrapped into a method or subroutine.
It is a rule of thumb in [[agile software development]]. A function should be defined in only one place, because it is easier to maintain that way. Even a few lines of code or one complex formula is better wrapped into a method or subroutine.
[[Category:Software]]
[[Category:Software Engineering]]