Immutability Another tenet of functional programming philosophy is not to modify data outside the function. In practice, this means to avoid modifying the input arguments to a function.

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“Pipeline-style programming,” for example, allows the arguments for a function to be submitted to the function with separate syntax.

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Example 3.7: Goal-Programming a Product Mix Problem. This example shows how to use PROC LP to solve a linear goal-programming problem. PROC LP has the ability to solve a series of linear programs, ...