Problem 54380. Define the higher order function - foldl
Given a binary function f, a starting value a, and a list (row vector) xs of values, the higher order function foldl folds the function f through the list from left to right. Your task is to provide a definition for foldl. Consider a recursive definition for elegance. Non-recursive definitions would be just fine as well.
Refer to the following mechanism as an example:
foldl(f,[4,7,5,6],2)
= foldl(f,[11,5,6],2)
= foldl(f,[16,6],2)
= foldl(f,[22],2)
= f(22,2)
= 24
![](https://upload.wikimedia.org/wikipedia/commons/5/5a/Left-fold-transformation.png)
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