Type declaration

• fromUndefinable: (<T>(value: undefined | T) => Option<T>)

  • • <T>(value: undefined | T): Option<T>

    • Convert Option<T> to T | undefined value

      Example

      const x: string | undefined = 'foo';
      assert.deepEqual(Option.fromUndefinable(x), Some('foo'));
      
      const y: string | undefined = undefined;
      assert.deepEqual(Option.fromUndefinable(y), None);
      
      const z = 'bar';
      assert.deepEqual(Option.fromUndefinable(z), Some('bar'));
      

      This is not in Rust.

      Type Parameters

      • T

      Parameters

      • value: undefined | T

      Returns Option<T>

• fromNullable: (<T>(value: null | T) => Option<T>)

  • • <T>(value: null | T): Option<T>

    • Convert Option<T> to T | null value

      Example

      const x: string | null = 'foo';
      assert.deepEqual(Option.fromNullable(x), Some('foo'));
      
      const y: string | null = null;
      assert.deepEqual(Option.fromNullable(y), None);
      
      const z = 'bar';
      assert.deepEqual(Option.fromNullable(z), Some('bar'));
      

      This is not in Rust.

      Type Parameters

      • T

      Parameters

      • value: null | T

      Returns Option<T>