# SRFI 1 - List library

The `(srfi 1)` provides a coherent and comprehensive set of list-processing procedures.

See the [SRFI document](http://srfi.schemers.org/srfi-1/srfi-1.html) for more information.

- Constructors:
[`xcons`](#xcons)
[`make-list`](#make-list)
[`list-tabulate`](#list-tabulate)
[`cons*`](#cons)
[`list-copy`](#list-copy)
[`circular-list`](#circular-list-1)
[`iota`](#iota)

- Predicates
[`proper-list?`](#proper-list)
[`circular-list?`](#circular-list)
[`dotted-list?`](#dotted-list)
[`not-pair?`](#not-pair)
[`null-list?`](#null-list)
[`list=`](#list=)

- Selectors
[`first`](#first)
[`second`](#second)
[`third`](#third)
[`fourth`](#fourth)
[`fifth`](#fifth)
[`sixth`](#sixth)
[`seventh`](#seventh)
[`eighth`](#eighth)
[`ninth`](#ninth)
[`tenth`](#tenth)
[`car+cdr`](#carcdr)
[`take`](#take)
[`drop`](#drop)
[`take-right`](#take-right)
[`drop-right`](#drop-right)
[`take!`](#take-1)
[`drop-right!`](#drop-right-1)
[`split-at`](#split-at)
[`split-at!`](#split-at-1)
[`last`](#last)
[`last-pair`](#last-pair)

- Miscellaneous: length, append, concatenate, reverse, zip, and count
[`length+`](#length)
[`zip`](#zip)
[`unzip1`](#unzip1)
[`unzip2`](#unzip2)
[`unzip3`](#unzip3)
[`unzip4`](#unzip4)
[`unzip5`](#unzip5)
[`count`](#count)
[`append!`](#append)
[`append-reverse`](#append-reverse)
[`append-reverse!`](#append-reverse-1)
[`concatenate`](#concatenate)
[`concatenate!`](#concatenate-1)
[`reverse!`](#reverse)

- Fold, unfold, and map
[`unfold`](#unfold)
[`fold`](#fold)
[`pair-fold`](#pair-fold)
[`reduce`](#reduce)
[`unfold-right`](#unfold-right)
[`fold-right`](#fold-right)
[`pair-fold-right`](#pair-fold-right)
[`reduce-right`](#reduce-right)
[`append-map`](#append-map)
[`append-map!`](#append-map-1)
[`map!`](#map)
[`pair-for-each`](#pair-for-each)
[`filter-map`](#filter-map)
[`map-in-order`](#map-in-order)

- Filtering and partitioning
[`filter`](#filter)
[`partition`](#partition)
[`remove`](#remove)
[`filter!`](#filter-1)
[`partition!`](#partition-1)
[`remove!`](#remove-1)

- Searching
[`find`](#find)
[`find-tail`](#find-tail)
[`any`](#any)
[`every`](#every)
[`list-index`](#list-index)
[`take-while`](#take-while)
[`drop-while`](#drop-while)
[`take-while!`](#take-while-1)
[`span`](#span)
[`break`](#break)
[`span!`](#span-1)
[`break!`](#break-1)

- Deleting
[`delete`](#delete)
[`delete!`](#delete-1)
[`delete-duplicates`](#delete-duplicates)
[`delete-duplicates!`](#delete-duplicates-1)

- Association lists
[`alist-cons`](#alist-cons)
[`alist-copy`](#alist-copy)
[`alist-delete`](#alist-delete)
[`alist-delete!`](#alist-delete-1)

- Set operations on lists
[`lset<=`](#lset)
[`lset=`](#lset-1)
[`lset-adjoin`](#lset-adjoin)
[`lset-union`](#lset-union)
[`lset-intersection`](#lset-intersection)
[`lset-difference`](#lset-difference)
[`lset-xor`](#lset-xor)
[`lset-diff+intersection`](#lset-diffintersection)
[`lset-union!`](#lset-union)
[`lset-intersection!`](#lset-intersection-1)
[`lset-difference!`](#lset-difference-1)
[`lset-xor!`](#lset-xor-1)

# xcons

# tree-copy

# make-list

# list-tabulate

# cons*

# list-copy 

# proper-list?

# circular-list?

# dotted-list?

# not-pair?

# null-list?

# list=

# circular-list

# length+

# iota

# first

# second

# third

# fourth

# fifth

# sixth

# seventh

# eighth

# ninth

# tenth

# car+cdr

# take

# drop

# take-right

# drop-right

# take!

# drop-right!

# split-at

# split-at!

# last

# last-pair

# zip

# unzip1

# unzip2

# unzip3

# unzip4

# unzip5

# count

# append!

# append-reverse

# append-reverse!

# concatenate

# concatenate!

# unfold

# fold

# pair-fold

# reduce

# unfold-right

# fold-right

# pair-fold-right

# reduce-right

# append-map

# append-map!

# map!

# pair-for-each

# filter-map

# map-in-order

# filter

# partition

# remove

# filter!

# partition!

# remove! 

# find

# find-tail

# any

# every

# list-index

# take-while

# drop-while

# take-while!

# span

# break

# span!

# break!

# delete

# delete!

# alist-cons

# alist-copy

# delete-duplicates

# delete-duplicates!

# alist-delete

# alist-delete!

# reverse! 

# lset<=

# lset=

# lset-adjoin  

# lset-union

# lset-intersection

# lset-difference

# lset-xor

# lset-diff+intersection

# lset-union!

# lset-intersection!

# lset-difference!

# lset-xor!