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It seems to me that all of these are related. What is the difference?
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Currying is helpful when you have to frequently call a function with a fixed argument. Considering, for example, the following function: If we want to define the function error , warn , and info , for every type, we have two options. Currying provides a shorter, concise, and more readable solution.
Currying is a checking method to make sure that you get everything you need before you proceed. It helps you to avoid passing the same variable again and again. It divides your function into multiple smaller functions that can handle one responsibility.
Function composition is the pointwise application of one function to the result of another. Developers do it in a manual manner every day when they nest functions: compose = (fn1, fn2) => value => fn2(fn1(value)) But this is hard to read.
Piping is used to perform a sequence of operations on some value (just like piping in Unix). The input to each function is the output of the previous function. Obviously this requires each function take a single arg.
Composition (<< / >>) is similar in that it calls two functions in sequence (i.e., the output of the first is the input to the second) but it returns a function instead of immediately invoking the sequence.
Currying creates a new function by applying 1 to N-1 args to a function of N args
So, composition and currying are used to create functions whereas piping is used for invocation. Composition and currying differ in the way they create new functions (by applying args vs chaining).
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