Exemplo n.º 1
0
        /// <summary>
        /// Map the sequence using the function provided
        /// </summary>
        /// <typeparam name="B"></typeparam>
        /// <param name="f">Mapping function</param>
        /// <returns>Mapped sequence</returns>
        public Seq <B> Map <B>(Func <A, B> f)
        {
            IEnumerable <B> Yield()
            {
                foreach (var item in this)
                {
                    yield return(f(item));
                }
            }

            return(SeqEnumerable <B> .New(Yield()));
        }
Exemplo n.º 2
0
        /// <summary>
        /// Filter the items in the sequence
        /// </summary>
        /// <param name="f">Predicate to apply to the items</param>
        /// <returns>Filtered sequence</returns>
        public Seq <A> Filter(Func <A, bool> f)
        {
            IEnumerable <A> Yield()
            {
                foreach (var item in this)
                {
                    if (f(item))
                    {
                        yield return(item);
                    }
                }
            }

            return(SeqEnumerable <A> .New(Yield()));
        }
Exemplo n.º 3
0
        /// <summary>
        /// Monadic bind (flatmap) of the sequence
        /// </summary>
        /// <typeparam name="B">Bound return value type</typeparam>
        /// <param name="bind">Bind function</param>
        /// <returns>Flatmapped sequence</returns>
        public Seq <C> SelectMany <B, C>(Func <A, Seq <B> > bind, Func <A, B, C> project)
        {
            IEnumerable <C> Yield()
            {
                foreach (var a in this)
                {
                    foreach (var b in bind(a))
                    {
                        yield return(project(a, b));
                    }
                }
            }

            return(SeqEnumerable <C> .New(Yield()));
        }
Exemplo n.º 4
0
        /// <summary>
        /// Monadic bind (flatmap) of the sequence
        /// </summary>
        /// <typeparam name="B">Bound return value type</typeparam>
        /// <param name="f">Bind function</param>
        /// <returns>Flatmapped sequence</returns>
        public Seq <B> Bind <B>(Func <A, Seq <B> > f)
        {
            IEnumerable <B> Yield()
            {
                foreach (var a in this)
                {
                    foreach (var b in f(a))
                    {
                        yield return(b);
                    }
                }
            }

            return(SeqEnumerable <B> .New(Yield()));
        }
Exemplo n.º 5
0
        /// <summary>
        /// Append operator
        /// </summary>
        public static Seq <A> operator +(Seq <A> x, Seq <A> y)
        {
            IEnumerable <A> Yield(Seq <A> sx, Seq <A> sy)
            {
                foreach (var a in sx)
                {
                    yield return(a);
                }
                foreach (var b in sy)
                {
                    yield return(b);
                }
            }

            return(SeqEnumerable <A> .New(Yield(x, y)));
        }
Exemplo n.º 6
0
 public static Seq <A> Cons <A>(this A head, IEnumerable <A> tail) =>
 SeqEnumerable <A> .New(head, tail);
Exemplo n.º 7
0
 public static Seq <A> createRange <A>(IEnumerable <A> items) =>
 SeqEnumerable <A> .New(items);