gofunctional2

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Version 2 of gofunctional.

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# gofunctional2

This API is now deprecated in favor of [gofunctional3](https://github.com/keep94/gofunctional3).

Functional programming in go. The main data type, Stream, is similar to
a python iterator or generator. The methods found in here are similar to
the methods found in the python itertools module. This is version 2 of
gofunctional.

This API is now stable. Any future changes will be backward compatible with
existing code. However, any future function or data structure in "draft"
mode may change in incompatible ways. Such function or data structure will
be clearly marked as "draft" in the documentation.

## Using

import "github.com/keep94/gofunctional2/functional"
	import "github.com/keep94/gofunctional2/consume"

## Installing

go get github.com/keep94/gofunctional2/functional
	go get github.com/keep94/gofunctional2/consume

## Online Documentation

Online documentation is available [here](http://go.pkgdoc.org/github.com/keep94/gofunctional2).

## Real World Example

Suppose there are names and phone numbers of people stored in a sqlite
database. The table has a name and phone_number column.

The person class would look like:

type Person struct {
	  Name string
	  Phone string
	}

func (p *Person) Ptrs() {
	  return []interface{}{&p.Name, &p.Phone}
	}

To get the 4th page of 25 people do:

package main

import (
	  "code.google.com/p/gosqlite/sqlite"
	  "github.com/keep94/gofunctional2/functional"
	)

func main() {
	  conn, _ := sqlite.Open("YourDataFilePath")
	  stmt, _ := conn.Prepare("select * from People")
	  s := functional.ReadRows(stmt)
	  s = functional.Slice(s, 3 * 25, 4 * 25)
          var person Person
          err := s.Next(&person)
          for ; err == nil; err = s.Next(&person) {
            // Display person here
          }
          if err != functional.Done {
            // Do error handling here

s.Close()
          }
        }

Like python iterators and generators, Stream types are lazily evaluated, so
the above code will read only the first 100 names no matter how many people
are in the database.

See tests and the included example for detailed usage.

gofunctional2

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