FindMinIterator.js

/**
 * @function FindMinIterator
 * @description Function to find the minimum number given in an array.
 */

const FindMinIterator = (_iterable, _selector = undefined) => {
 let min

 const iterator = _iterable[Symbol.iterator]()
 if (!_selector) {
 let current = iterator.next()
 if (current.done) {
 return undefined
 }
 min = current.value

 current = iterator.next()
 while (!current.done) {
 const x = current.value
 if (x < min) {
 min = x
 }
 current = iterator.next()
 }
 } else {
 let current = iterator.next()
 if (current.done) {
 return undefined
 }
 min = _selector(current.value)

 current = iterator.next()
 while (!current.done) {
 const x = _selector(current.value)
 if (x < min) {
 min = x
 }
 current = iterator.next()
 }
 }
 return min
}

export { FindMinIterator }