ts-data-forge
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    Function lastIndexOfFrom

    • Gets the last index of a value in an array, starting from a specified index.

      Type Parameters

      • const Ar extends readonly unknown[]

      Parameters

      • array: Ar
      • searchElement: Ar[number]
      • fromIndex: ArgArrayIndexWithNegative<Ar>

      Returns -1 | ArrayIndex<Ar>

      const fruits = ['apple', 'banana', 'orange', 'banana', 'grape'];

      // Search backwards for 'banana' from index 3
      const lastBananaFrom3 = Arr.lastIndexOfFrom(fruits, 'banana', 3);
      // Search backwards for 'banana' from index 2
      const lastBananaFrom2 = Arr.lastIndexOfFrom(fruits, 'banana', 2);
      // Element not found
      const notFound = Arr.lastIndexOfFrom(fruits, 'grape', 2);

      // Curried version
      const findBananaFrom3 = Arr.lastIndexOfFrom('banana', 3);
      const index = findBananaFrom3(fruits);

      console.log(lastBananaFrom3); // => 3
      console.log(lastBananaFrom2); // => 1
      console.log(notFound); // => -1
      console.log(index); // => 3

    • Gets the last index of a value in an array, starting from a specified index.

      Type Parameters

      • E

      Parameters

      • searchElement: E
      • fromIndex: ArgArrWithNegative

      Returns (array: readonly E[]) => -1 | Uint32

      const fruits = ['apple', 'banana', 'orange', 'banana', 'grape'];

      // Search backwards for 'banana' from index 3
      const lastBananaFrom3 = Arr.lastIndexOfFrom(fruits, 'banana', 3);
      // Search backwards for 'banana' from index 2
      const lastBananaFrom2 = Arr.lastIndexOfFrom(fruits, 'banana', 2);
      // Element not found
      const notFound = Arr.lastIndexOfFrom(fruits, 'grape', 2);

      // Curried version
      const findBananaFrom3 = Arr.lastIndexOfFrom('banana', 3);
      const index = findBananaFrom3(fruits);

      console.log(lastBananaFrom3); // => 3
      console.log(lastBananaFrom2); // => 1
      console.log(notFound); // => -1
      console.log(index); // => 3

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