From 3f030ca50550ae42578f1a2d5776280d7f8d98d9 Mon Sep 17 00:00:00 2001
From: Scott Richmond <kredati@users.noreply.github.com>
Date: Sat, 15 Jun 2024 18:12:28 -0400
Subject: [PATCH] add back to top links

---
 prelude.md | 151 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 151 insertions(+)

diff --git a/prelude.md b/prelude.md
index bb66aef..62df3ea 100644
--- a/prelude.md
+++ b/prelude.md
@@ -81,6 +81,7 @@ Returns the absolute value of a number.
 (0)
 (n as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### add
@@ -92,6 +93,7 @@ Adds numbers or vectors.
 (x, y, ...)
 ((x1, y1), (x2, y2))
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### and
@@ -102,6 +104,7 @@ Returns true if all values passed in are truthy. Note that this does not short-c
 (x, y)
 (x, y, ...)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### angle
@@ -109,6 +112,7 @@ Calculates the angle between two vectors.
 ```
 (v1, v2)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### any?
@@ -121,6 +125,7 @@ Returns true if something is not empty, otherwise returns false (including for t
 (s as :string)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### append
@@ -132,6 +137,7 @@ Adds an element to a list or set.
 (xs as :set)
 (xs as :set, x)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### assert!
@@ -140,6 +146,7 @@ Asserts a condition: returns the value if the value is truthy, panics if the val
 (value)
 (msg, value)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### assoc
@@ -150,6 +157,7 @@ Takes a dict, key, and value, and returns a new dict with the key set to value.
 (dict as :dict, key as :keyword, value)
 (dict as :dict, (key as :keyword, value))
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### assoc?
@@ -159,6 +167,7 @@ Returns true if a value is an associative collection: a dict or a pkg.
 (assoc as :pkg)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### at
@@ -169,6 +178,7 @@ Returns the element at index n of a list or tuple, or the byte at index n of a s
 (str as :string, n as :number)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### atan/2
@@ -181,6 +191,7 @@ Returns an angle from a slope. Takes an optional keyword argument to specify uni
 ((x, y))
 ((x, y), units as :keyword)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### back!
@@ -188,6 +199,7 @@ Moves the turtle backward by a number of steps. Alias: bk!
 ```
 (steps as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### background!
@@ -197,6 +209,7 @@ Sets the background color behind the turtle and path. Alias: bg!
 ((r as :number, g as :number, b as :number))
 ((r as :number, g as :number, b as :number, a as :number))
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### between?
@@ -204,6 +217,7 @@ Returns true if a number is in the range [lower, higher): greater than or equal
 ```
 (lower as :number, higher as :number, x as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### bg!
@@ -213,6 +227,7 @@ Sets the background color behind the turtle and path. Alias: bg!
 ((r as :number, g as :number, b as :number))
 ((r as :number, g as :number, b as :number, a as :number))
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### bgcolor
@@ -224,6 +239,7 @@ Moves the turtle backward by a number of steps. Alias: bk!
 ```
 (steps as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### bool
@@ -233,6 +249,7 @@ Returns false if a value is nil or false, otherwise returns true.
 (false)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### bool?
@@ -242,6 +259,7 @@ Returns true if a value is of type :boolean.
 (true)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### box?
@@ -250,6 +268,7 @@ Returns true if a value is a box.
 (b as :box)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### butlast
@@ -257,6 +276,7 @@ Returns a list, omitting the last element.
 ```
 (xs as :list)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### ceil
@@ -264,6 +284,7 @@ Truncates a number towards positive infinity. With negative numbers, it returns
 ```
 (n as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### clear!
@@ -271,6 +292,7 @@ Clears the canvas and sends the turtle home.
 ```
 ()
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### coll?
@@ -283,6 +305,7 @@ Returns true if a value is a collection: dict, list, pkg, tuple, or set.
 (coll as :pkg)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### colors
@@ -297,6 +320,7 @@ Combines two lists, strings, or sets.
 (xs as :set, ys as :set)
 (xs, ys, ...)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### cos
@@ -307,6 +331,7 @@ Returns the cosine of an angle. Default angle measure is turns. An optional keyw
 (a as :number, :degrees)
 (a as :number, :radians)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### count
@@ -318,6 +343,7 @@ Returns the number of elements in a collection (including string).
 (xs as :string)
 (xs as :set)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### dec
@@ -325,6 +351,7 @@ Decrements a number.
 ```
 (x as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### deg/rad
@@ -332,6 +359,7 @@ Converts an angle in degrees to an angle in radians.
 ```
 (a as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### deg/turn
@@ -339,6 +367,7 @@ Converts an angle in degrees to an angle in turns.
 ```
 (a as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### dict
@@ -348,6 +377,7 @@ Takes a list or tuple of (key, value) tuples and returns it as a dict. Returns d
 (list as :list)
 (tup as :tuple)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### dict?
@@ -356,6 +386,7 @@ Returns true if a value is a dict.
 (dict as :dict)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### diff
@@ -363,6 +394,7 @@ Takes two dicts and returns a dict describing their differences. Does this shall
 ```
 (d1 as :dict, d2 as :dict)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### dissoc
@@ -371,6 +403,7 @@ Takes a dict and a key, and returns a new dict with the key and associated value
 (dict as :dict)
 (dict as :dict, key as :keyword)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### dist
@@ -379,6 +412,7 @@ Returns the distance from the origin to a point described by (x, y).
 (x as :number, y as :number)
 ((x, y))
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### div
@@ -389,6 +423,7 @@ Divides numbers. Panics on division by zero.
 (x as :number, y as :number)
 (x, y, ...)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### div/0
@@ -399,6 +434,7 @@ Divides numbers. Returns 0 on division by zero.
 (x as :number, y as :number)
 (x, y, ...)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### div/safe
@@ -409,6 +445,7 @@ Divides a number. Returns a result tuple.
 (x, y)
 (x, y, ...)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### doc!
@@ -417,6 +454,7 @@ Prints the documentation of a function to the console.
 (f as :fn)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### downcase
@@ -424,6 +462,7 @@ Takes a string and returns it in all lowercase. Works only for ascii characters.
 ```
 (str as :string)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### each!
@@ -433,6 +472,7 @@ Takes a list and applies a function, presumably with side effects, to each eleme
 (f! as :fn, [x])
 (f! as :fn, [...])
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### empty?
@@ -445,6 +485,7 @@ Returns true if something is empty. Otherwise returns false (including for thing
 ("")
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### eq?
@@ -454,6 +495,7 @@ Returns true if all arguments have the same value.
 (x, y)
 (x, y, ...)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### err
@@ -461,6 +503,7 @@ Takes a value and wraps it in an :err result tuple, presumably as an error messa
 ```
 (msg)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### err?
@@ -469,6 +512,7 @@ Takes a value and returns true if it is an :err result tuple.
 ((:err, _))
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### even?
@@ -477,6 +521,7 @@ Returns true if a value is an even number, otherwise returns false.
 (x as :number)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### false?
@@ -485,6 +530,7 @@ Returns `true` if a value is `false`, otherwise returns `false`. Useful to disti
 (false)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### fd!
@@ -492,6 +538,7 @@ Moves the turtle forward by a number of steps. Alias: fd!
 ```
 (steps as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### filter
@@ -499,6 +546,7 @@ Takes a list and a predicate function, and returns a new list with only the item
 ```
 (p? as :fn, xs)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### first
@@ -506,6 +554,7 @@ Returns the first element of a list or tuple.
 ```
 (xs)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### floor
@@ -513,6 +562,7 @@ Truncates a number towards negative infinity. With positive numbers, it returns
 ```
 (n as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### fn?
@@ -521,6 +571,7 @@ Returns true if an argument is a function.
 (f as :fn)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### fold
@@ -529,6 +580,7 @@ Folds a list.
 (f as :fn, xs as :list)
 (f as :fn, xs as :list, root)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### forward!
@@ -536,6 +588,7 @@ Moves the turtle forward by a number of steps. Alias: fd!
 ```
 (steps as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### get
@@ -545,6 +598,7 @@ Takes a key, dict, and optional default value; returns the value at key. If the
 (key as :keyword, dict as :dict)
 (key as :keyword, dict as :dict, default)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### goto!
@@ -553,6 +607,7 @@ Sends the turtle to (x, y) coordinates. If the pen is down, the turtle will draw
 (x as :number, y as :number)
 ((x, y))
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### gt?
@@ -562,6 +617,7 @@ Returns true if numbers are in decreasing order.
 (x as :number, y as :number)
 (x, y, ...)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### gte?
@@ -571,6 +627,7 @@ Returns true if numbers are in decreasing or flat order.
 (x as :number, y as :number)
 (x, y, ...)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### heading
@@ -578,6 +635,7 @@ Returns the turtle's current heading.
 ```
 ()
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### heading/vector
@@ -585,6 +643,7 @@ Takes a turtle heading, and returns a unit vector of that heading.
 ```
 (heading)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### home!
@@ -592,6 +651,7 @@ Sends the turtle home: to the centre of the screen, pointing up. If the pen is d
 ```
 ()
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### inc
@@ -599,6 +659,7 @@ Increments a number.
 ```
 (x as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### inv
@@ -606,6 +667,7 @@ Returns the inverse of a number: 1/n or `div (1, n)`. Panics on division by zero
 ```
 (x as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### inv/0
@@ -613,6 +675,7 @@ Returns the inverse of a number: 1/n or `div/0 (1, n)`. Returns 0 on division by
 ```
 (x as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### inv/safe
@@ -620,6 +683,7 @@ Returns the inverse of a number: 1/n or `div/safe (1, n)`. Returns a result tupl
 ```
 (x as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### join
@@ -631,6 +695,7 @@ Takes a list of strings, and joins them into a single string, interposing an opt
 ([str], separator as :string)
 ([str, ...], separator as :string)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### keep
@@ -638,6 +703,7 @@ Takes a list and returns a new list with any `nil` values omitted.
 ```
 (xs)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### keys
@@ -645,6 +711,7 @@ Takes a dict and returns a list of keys in that dict.
 ```
 (dict as :dict)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### keyword?
@@ -653,6 +720,7 @@ Returns true if a value is a keyword, otherwise returns false.
 (kw as :keyword)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### last
@@ -660,6 +728,7 @@ Returns the last element of a list or tuple.
 ```
 (xs)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### left!
@@ -667,6 +736,7 @@ Rotates the turtle left, measured in turns. Alias: lt!
 ```
 (turns as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### list
@@ -674,6 +744,7 @@ Takes a value and returns it as a list. For values, it simply wraps them in a li
 ```
 (x)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### list?
@@ -682,6 +753,7 @@ Returns true if the value is a list.
 (l as :list)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### load_turtle_state!
@@ -689,6 +761,7 @@ Sets the turtle state to a previously saved state. Returns the state.
 ```
 (state)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### lt!
@@ -696,6 +769,7 @@ Rotates the turtle left, measured in turns. Alias: lt!
 ```
 (turns as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### lt?
@@ -705,6 +779,7 @@ Returns true if numbers are in increasing order.
 (x as :number, y as :number)
 (x, y, ...)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### lte?
@@ -714,6 +789,7 @@ Returns true if numbers are in increasing or flat order.
 (x as :number, y as :number)
 (x, y, ...)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### map
@@ -722,6 +798,7 @@ Maps a function over a list: returns a new list with elements that are the resul
 (f as :fn, xs)
 (kw as :keyword, xs)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### max
@@ -731,6 +808,7 @@ Returns the number in its arguments that is closest to positive infinity.
 (x as :number, y as :number)
 (x, y, ...)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### min
@@ -740,6 +818,7 @@ Returns the number in its arguments that is closest to negative infinity.
 (x as :number, y as :number)
 (x, y, ...)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### mod
@@ -747,6 +826,7 @@ Returns the modulus of num and div. Truncates towards negative infinity.
 ```
 (num as :number, div as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### mult
@@ -759,6 +839,7 @@ Multiplies numbers or vectors.
 (scalar as :number, (x, y))
 ((x, y), scalar as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### neg
@@ -766,6 +847,7 @@ Multiplies a number by -1, negating it.
 ```
 (n as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### neg?
@@ -774,6 +856,7 @@ Returns true if a value is a negative number, otherwise returns false.
 (x as :number)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### neq?
@@ -783,6 +866,7 @@ Returns true if none of the arguments have the same value.
 (x, y)
 (x, y, ...)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### nil?
@@ -791,6 +875,7 @@ Returns true if a value is nil.
 (nil)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### not
@@ -800,6 +885,7 @@ Returns false if a value is truthy, true if a value is falsy.
 (false)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### odd?
@@ -808,6 +894,7 @@ Returns true if a value is an odd number, otherwise returns false.
 (x as :number)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### ok
@@ -815,6 +902,7 @@ Takes a value and wraps it in an :ok result tuple.
 ```
 (value)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### ok?
@@ -823,6 +911,7 @@ Takes a value and returns true if it is an :ok result tuple.
 ((:ok, _))
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### or
@@ -833,6 +922,7 @@ Returns true if any value passed in is truthy. Note that this does not short-cir
 (x, y)
 (x, y, ...)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### ordered?
@@ -842,6 +932,7 @@ Returns true if a value is an indexed collection: list or tuple.
 (coll as :tuple)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### p5_calls
@@ -855,6 +946,7 @@ Changes the turtle's pen color. Takes a single grayscale value, an rgb tuple, or
 ((r as :number, g as :number, b as :number))
 ((r as :number, g as :number, b as :number, a as :number))
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### pd!
@@ -862,6 +954,7 @@ Lowers the turtle's pen, causing it to draw. Alias: pd!
 ```
 ()
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### pencolor
@@ -869,6 +962,7 @@ Returns the turtle's pen color as an (r, g, b, a) tuple.
 ```
 ()
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### pencolor!
@@ -878,6 +972,7 @@ Changes the turtle's pen color. Takes a single grayscale value, an rgb tuple, or
 ((r as :number, g as :number, b as :number))
 ((r as :number, g as :number, b as :number, a as :number))
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### pendown!
@@ -885,6 +980,7 @@ Lowers the turtle's pen, causing it to draw. Alias: pd!
 ```
 ()
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### pendown?
@@ -892,6 +988,7 @@ Returns the turtle's pen state: true if the pen is down.
 ```
 ()
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### penup!
@@ -899,6 +996,7 @@ Lifts the turtle's pen, stopping it from drawing. Alias: pu!
 ```
 ()
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### penwidth
@@ -906,6 +1004,7 @@ Returns the turtle's pen width in pixels.
 ```
 ()
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### penwidth!
@@ -913,6 +1012,7 @@ Sets the width of the turtle's pen, measured in pixels. Alias: pw!
 ```
 (width as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### pi
@@ -925,6 +1025,7 @@ Returns true if a value is a positive number, otherwise returns false.
 (x as :number)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### position
@@ -932,6 +1033,7 @@ Returns the turtle's current position.
 ```
 ()
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### print!
@@ -939,6 +1041,7 @@ Sends a text representation of Ludus values to the console.
 ```
 (...)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### pu!
@@ -946,6 +1049,7 @@ Lifts the turtle's pen, stopping it from drawing. Alias: pu!
 ```
 ()
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### pw!
@@ -953,6 +1057,7 @@ Sets the width of the turtle's pen, measured in pixels. Alias: pw!
 ```
 (width as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### rad/deg
@@ -960,6 +1065,7 @@ Converts an angle in radians to an angle in degrees.
 ```
 (a as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### rad/turn
@@ -967,6 +1073,7 @@ Converts an angle in radians to an angle in turns.
 ```
 (a as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### random
@@ -978,6 +1085,7 @@ Returns a random number. With zero arguments, returns a random number between 0
 (l as :list)
 (d as :dict)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### random_int
@@ -986,6 +1094,7 @@ Returns a random integer. With one argument, returns a random integer between 0
 (n as :number)
 (m as :number, n as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### range
@@ -994,6 +1103,7 @@ Returns the set of integers between start (inclusive) and end (exclusive) as a l
 (end as :number)
 (start as :number, end as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### render_turtle!
@@ -1001,6 +1111,7 @@ No docstring available.
 ```
 ()
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### report!
@@ -1009,6 +1120,7 @@ Prints a value, then returns it.
 (x)
 (msg as :string, x)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### reset_turtle!
@@ -1016,6 +1128,7 @@ Resets the turtle to its original state.
 ```
 ()
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### rest
@@ -1024,6 +1137,7 @@ Returns all but the first element of a list or tuple, as a list.
 (xs as :list)
 (xs as :tuple)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### right!
@@ -1031,6 +1145,7 @@ Rotates the turtle right, measured in turns. Alias: rt!
 ```
 (turns as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### round
@@ -1038,6 +1153,7 @@ Rounds a number to the nearest integer.
 ```
 (n as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### rt!
@@ -1045,6 +1161,7 @@ Rotates the turtle right, measured in turns. Alias: rt!
 ```
 (turns as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### second
@@ -1052,6 +1169,7 @@ Returns the second element of a list or tuple.
 ```
 (xs)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### sentence
@@ -1059,6 +1177,7 @@ Takes a list of words and turns it into a sentence.
 ```
 (strs as :list)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### set
@@ -1067,6 +1186,7 @@ Takes an ordered collection--list or tuple--and turns it into a set.
 (xs as :list)
 (xs as :tuple)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### set?
@@ -1075,6 +1195,7 @@ Returns true if a value is a set.
 (xs as :set)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### show
@@ -1082,6 +1203,7 @@ Returns a text representation of a Ludus value as a string.
 ```
 (x)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### sin
@@ -1092,6 +1214,7 @@ Returns the sine of an angle. Default angle measure is turns. An optional keywor
 (a as :number, :degrees)
 (a as :number, :radians)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### slice
@@ -1102,6 +1225,7 @@ Returns a slice of a list, representing a sub-list.
 (str as :string, end as :number)
 (str as :string, start as :number, end as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### some
@@ -1110,6 +1234,7 @@ Takes a possibly nil value and a default value. Returns the value if it's not ni
 (nil, default)
 (value, _)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### some?
@@ -1118,6 +1243,7 @@ Returns true if a value is not nil.
 (nil)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### split
@@ -1125,6 +1251,7 @@ Takes a string, and turns it into a list of strings, breaking on the separator.
 ```
 (str as :string, break as :string)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### square
@@ -1132,6 +1259,7 @@ Squares a number.
 ```
 (x as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### state
@@ -1143,6 +1271,7 @@ Stores a value in a box, replacing the value that was previously there. Returns
 ```
 (b as :box, value)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### string
@@ -1152,6 +1281,7 @@ Converts a value to a string by using `show`. If it is a string, returns it unha
 (x)
 (x, ...)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### string?
@@ -1160,6 +1290,7 @@ Returns true if a value is a string.
 (x as :string)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### strip
@@ -1173,6 +1304,7 @@ Removes punctuation from a string, removing all instances of ,.;:?!
 ("{x}!{y}")
 (x)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### sub
@@ -1184,6 +1316,7 @@ Subtracts numbers or vectors.
 (x, y, ...)
 ((x1, y1), (x2, y2))
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### sum_of_squares
@@ -1194,6 +1327,7 @@ Returns the sum of squares of numbers.
 (x as :number, y as :number)
 (x, y, ...)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### tan
@@ -1204,6 +1338,7 @@ Returns the sine of an angle. Default angle measure is turns. An optional keywor
 (a as :number, :degrees)
 (a as :number, :radians)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### tau
@@ -1217,6 +1352,7 @@ Trims whitespace from a string. Takes an optional argument, `:left` or `:right`,
 (str as :string, :left)
 (str as :string, :right)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### tuple?
@@ -1225,6 +1361,7 @@ Returns true if a value is a tuple.
 (tuple as :tuple)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### turn/deg
@@ -1232,6 +1369,7 @@ Converts an angle in turns to an angle in degrees.
 ```
 (a as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### turn/rad
@@ -1239,6 +1377,7 @@ Converts an angle in turns to an angle in radians.
 ```
 (a as :number)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### turtle_commands
@@ -1250,6 +1389,7 @@ Returns the turtle's current state.
 ```
 ()
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### turtle_states
@@ -1261,6 +1401,7 @@ Returns a keyword representing the type of the value passed in.
 ```
 (x)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### unbox
@@ -1268,6 +1409,7 @@ Returns the value that is stored in a box.
 ```
 (b as :box)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### unwrap!
@@ -1277,6 +1419,7 @@ Takes a result tuple. If it's :ok, then returns the value. If it's not :ok, then
 ((:err, msg))
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### unwrap_or
@@ -1285,6 +1428,7 @@ Takes a value that is a result tuple and a default value. If it's :ok, then it r
 ((:ok, value), _)
 ((:err, _), default)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### upcase
@@ -1292,6 +1436,7 @@ Takes a string and returns it in all uppercase. Works only for ascii characters.
 ```
 (str as :string)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### update
@@ -1300,6 +1445,7 @@ Takes a dict, key, and function, and returns a new dict with the key set to the
 (dict as :dict)
 (dict as :dict, key as :keyword, updater as :fn)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### update!
@@ -1307,6 +1453,7 @@ Updates a box by applying a function to its value. Returns the new value.
 ```
 (b as :box, f as :fn)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### values
@@ -1314,6 +1461,7 @@ Takes a dict and returns a list of values in that dict.
 ```
 (dict)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### words
@@ -1321,6 +1469,7 @@ Takes a string and returns a list of the words in the string. Strips all whitesp
 ```
 (str as :string)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### ws?
@@ -1331,6 +1480,7 @@ Tells if a string is a whitespace character.
 ("\t")
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)
 
 
 ### zero?
@@ -1339,3 +1489,4 @@ Returns true if a number is 0.
 (0)
 (_)
 ```
+[Back to top.](#ludus-prelude-documentation)