Class Pair<FirstType, SecondType>

Class Pair implements KoconutEquatable. The 'equalsTo' method of this basically check whether each individual element (first/second) is same or not. When the type of each element is child of KoconutEquatable, it'd be done by using its 'equalsTo' method. Otherwise, it'd be done simply by '==' operator.

Returns

Example

  // Case 1 -- All values are simply number or string
  const myPairCase1_01 = Pair.from([10, 20])
  const myPairCase1_02 = Pair.from([10, 20])
  console.log(`${myPairCase1_01.equalsTo(myPairCase1_02)}`)
  // ↑ true

  const myPairCase1_03 = Pair.from(["Apex", "Captain"])
  const myPairCase1_04 = Pair.from(["Apex", "Captain"])
  console.log(`${myPairCase1_03 == myPairCase1_04}`)
  // ↑ false
  console.log(`${myPairCase1_03.equalsTo(myPairCase1_04)}`)
  // ↑ true

  // Case 2 -- First Type is indistinguishable class
  class MyClass {
      private value : string
      constructor(value : string) {
          this.value = value
      }
  }
  const myPairCase2_01 = Pair.from([new MyClass("Apex"), "Captain"])
  const myPairCase2_02 = Pair.from([new MyClass("Apex"), "Captain"])
  console.log(`${myPairCase2_01.equalsTo(myPairCase2_02)}`)
  // ↑ false

  // Case 3 -- First Type is distinguishable class
  class MyDistinguishableClass implements KoconutEquatable {
      private value : string
      constructor(value : string) {
          this.value = value
      }
      equalsTo(other : MyDistinguishableClass) : boolean {
          return this.value == other.value
      }
  }
  const myPairCase3_01 = Pair.from([new MyDistinguishableClass("Apex"), "Captain"])
  const myPairCase3_02 = Pair.from([new MyDistinguishableClass("Apex"), "Captain"])
  console.log(`${myPairCase3_01.equalsTo(myPairCase3_02)}`)
  // ↑ true

Turns this Pair instance into a simple array.

Returns

Example

const myPair = Pair.from(["Apex","Captain"])
console.log(myPair.toArray())
// ↑ [ 'Apex', 'Captain' ]

Turns this Pair instance into a simple Entry

Returns

Example

const myPair = Pair.from(["Apex","Captain"])
console.log(myPair.toEntry())
// ↑ Entry { keyElement: 'Apex', valueElement: 'Captain' }

Turns this Pair instance into a simple JSON object string.

Returns

Example

const myPair = Pair.from(["Apex","Captain"])
console.log(myPair.toString()) // Or, you can use console.log(`${myPair}`)
// ↑ {"first":"Apex","second":"Captain"}

Create a Pair instance by iterable two values pair.

Returns

const myPair = Pair.from(["Apex","Captain"])
console.log(myPair)
// ↑ Pair { firstElement: 'Apex', secondElement: 'Captain' }