FP

Functional Programming, Continued

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The following examples will use elephant as the troublesome argument. In your programs it will take many forms. Maybe it is the amount of precision used for calculations. Or the character encoding for processing strings. Or the bit depth of internal images. In my experience, the troublesome arguments are meta-flags that configure how a function goes about calculation. The small functions deep in the call tree are the only places the flag might be used, but the flags are user selected and thus come from the highest UI levels. Somehow these flags need to propagate through all the function calls, from where they are created to where they are used.

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