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25 lines
561 B
Markdown
25 lines
561 B
Markdown
---
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title: compose_right
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tags: function,intermediate
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---
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Performs left-to-right function composition.
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Use `functools.reduce()` to perform left-to-right function composition.
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The first (leftmost) function can accept one or more arguments; the remaining functions must be unary.
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```py
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from functools import reduce
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def compose_right(*fns):
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return reduce(lambda f, g: lambda *args: g(f(*args)), fns)
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```
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```py
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add = lambda x, y: x + y
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square = lambda x: x * x
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add_and_square = compose_right(add,square)
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add_and_square(1, 2) # 9
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```
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