HomeSoftware EngineeringThe right way to Reverse Type Integers in Go

The right way to Reverse Type Integers in Go


The problem

The 2 oldest ages operate/technique must be accomplished. It ought to take an array of numbers as its argument and return the two highest numbers throughout the array. The returned worth needs to be an array within the format [second oldest age, oldest age].

The order of the numbers handed in could possibly be any order. The array will at all times embrace not less than 2 objects. If there are two or extra oldest age, then return each of them in array format.

For instance:

TwoOldestAges([]int{1, 5, 87, 45, 8, 8}) // ought to return [2]int{45, 87}

The answer in Go

Possibility 1:

package deal answer
import "type"
func TwoOldestAges(ages []int) [2]int {
  type.Type(type.Reverse(type.IntSlice(ages)))
  return [2]int{ages[1],ages[0]}
}

Possibility 2:

package deal answer
func TwoOldestAges(ages []int) [2]int {
  a, b := 0, 0
  for _, v := vary ages {
    if v > b {
      a, b = b, v
    } else if v > a {
      a = v
    }
  }
  return [2]int{a, b}
}

Possibility 3:

package deal answer
import "type"
func TwoOldestAges(ages []int) [2]int {
  type.Ints(ages)
  return [2]int{ages[len(ages)-2],ages[len(ages)-1]}
}

Check instances to validate our answer

package deal solution_test
import (
  . "github.com/onsi/ginkgo"
  . "github.com/onsi/gomega"
)
var _ = Describe("TwoOldestAges", func() {
  It("ought to return 18 and 83 for enter []int{6,5,83,5,3,18}", func() {
    Count on(TwoOldestAges([]int{6,5,83,5,3,18})).To(Equal([2]int{18,83}))
  })
  It("ought to return 45 and 87 for enter []int{1,5,87,45,8,8}", func() {
    Count on(TwoOldestAges([]int{1,5,87,45,8,8})).To(Equal([2]int{45,87}))
  })
})
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