Problem 201. Mimic foldl in functional programming

Solution 1591452

Submitted on 25 Jul 2018 by J. S. Kowontan

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Test	Status	Code Input and Output
1	Pass	assert(isequal(foldl(@plus, 0, 1:100), 5050));
2	Pass	r = rand(1, 100); y = foldl(@plus, 0, r); yc = sum(r); assert(abs(y - yc)/abs(y) < 1e-6);
3	Pass	assert(isequal(foldl(@times, 1, 1:15), factorial(15)));
4	Pass	r = rand(1, 1000); assert(isequal(foldl(@max, -Inf, r), max(r)));
5	Pass	assert(isequal(foldl(@(x_, y_) 2*x_ + y_, 4, 1:3), 43));
6	Pass	sumplusfive = foldl(@plus, 5); assert(isequal(sumplusfive(1:100), 5055));
7	Pass	concat = foldl(@(x_, y_) [x_ y_]); r1 = rand(1, 10); r2 = rand(1, 10); assert(isequal(concat(r1, r2), [r1 r2]));

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