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{Unary Function Chainer}
The Question
Write a higher order function for chaining together a list of unary functions. In other words, it should return a function that does a left fold on the given functions.
Example
chained([a,b,c,d])(input)
should yield the same result as
d(c(b(a(input))))
Example
function a(num){
return num * 2; //5 * 2 = 10
}
function b(num){
return num + 2; //10 + 2 = 12
}
function c(num){
return num / 4; //12 / 4 = 3
}
function d(num){
return num - 5; // 3 - 5 = -2
}
chained([a, b, c, d])(5) // returns -2'use strict'
function chained(functions) {
return function(x){
return functions.reduce(function(acc, curr){
return curr(acc);
}, x)
};
}Solution