If your project is really necessary, you probably do not need a purely functional language. But you probably still want a language with functional features; a functional style refers to a low-level code structure in the same way an object-oriented style refers to a high-level structure. Both allow you to pack certain common language-supported templates.
In the primary imperative project, the functional style is useful at the level of expressions and expressions, allowing you to separate common loops and sequences:
For example, take this general template:
newlist = []
for x in oldlist:
y = dosomething(x)
newlist.append(y)
This is map:
newlist = map(dosomething, oldlist)
:
total = 1
for n in numbers:
total = total * n
fold ( reduce):
total = fold(*, 1, numbers)
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