diff --git a/prelude.md b/prelude.md
index 96f0f9c..3e01279 100644
--- a/prelude.md
+++ b/prelude.md
@@ -56,7 +56,7 @@ You can see what this looks like in the last clause of `add`: `((x1, y1), (x2, y
 [any?](#any)&nbsp;&nbsp;&nbsp; [append](#append)&nbsp;&nbsp;&nbsp; [at](#at)&nbsp;&nbsp;&nbsp; [butlast](#butlast)&nbsp;&nbsp;&nbsp; [coll?](#coll)&nbsp;&nbsp;&nbsp; [concat](#concat)&nbsp;&nbsp;&nbsp; [count](#count)&nbsp;&nbsp;&nbsp; [each!](#each)&nbsp;&nbsp;&nbsp; [empty?](#empty)&nbsp;&nbsp;&nbsp; [filter](#filter)&nbsp;&nbsp;&nbsp; [first](#first)&nbsp;&nbsp;&nbsp; [fold](#fold)&nbsp;&nbsp;&nbsp; [join](#join)&nbsp;&nbsp;&nbsp; [keep](#keep)&nbsp;&nbsp;&nbsp; [last](#last)&nbsp;&nbsp;&nbsp; [list](#list)&nbsp;&nbsp;&nbsp; [list?](#list)&nbsp;&nbsp;&nbsp; [map](#map)&nbsp;&nbsp;&nbsp; [ordered?](#ordered)&nbsp;&nbsp;&nbsp; [random](#random)&nbsp;&nbsp;&nbsp; [range](#range)&nbsp;&nbsp;&nbsp; [rest](#rest)&nbsp;&nbsp;&nbsp; [second](#second)&nbsp;&nbsp;&nbsp; [sentence](#sentence)&nbsp;&nbsp;&nbsp; [slice](#slice)
 
 ### Math
-[abs](#abs)&nbsp;&nbsp;&nbsp; [add](#add)&nbsp;&nbsp;&nbsp; [angle](#angle)&nbsp;&nbsp;&nbsp; [atan/2](#atan2)&nbsp;&nbsp;&nbsp; [between?](#between)&nbsp;&nbsp;&nbsp; [ceil](#ceil)&nbsp;&nbsp;&nbsp; [cos](#cos)&nbsp;&nbsp;&nbsp; [dec](#dec)&nbsp;&nbsp;&nbsp; [deg/rad](#degrad)&nbsp;&nbsp;&nbsp; [deg/turn](#degturn)&nbsp;&nbsp;&nbsp; [dist](#dist)&nbsp;&nbsp;&nbsp; [div](#div)&nbsp;&nbsp;&nbsp; [div/0](#div0)&nbsp;&nbsp;&nbsp; [div/safe](#divsafe)&nbsp;&nbsp;&nbsp; [even?](#even)&nbsp;&nbsp;&nbsp; [floor](#floor)&nbsp;&nbsp;&nbsp; [gt?](#gt)&nbsp;&nbsp;&nbsp; [gte?](#gte)&nbsp;&nbsp;&nbsp; [heading/vector](#headingvector)&nbsp;&nbsp;&nbsp; [inc](#inc)&nbsp;&nbsp;&nbsp; [inv](#inv)&nbsp;&nbsp;&nbsp; [inv/0](#inv0)&nbsp;&nbsp;&nbsp; [inv/safe](#invsafe)&nbsp;&nbsp;&nbsp; [lt?](#lt)&nbsp;&nbsp;&nbsp; [lte?](#lte)&nbsp;&nbsp;&nbsp; [max](#max)&nbsp;&nbsp;&nbsp; [min](#min)&nbsp;&nbsp;&nbsp; [mod](#mod)&nbsp;&nbsp;&nbsp; [mod/0](#mod0)&nbsp;&nbsp;&nbsp; [mod/safe](#modsafe)&nbsp;&nbsp;&nbsp; [mult](#mult)&nbsp;&nbsp;&nbsp; [neg](#neg)&nbsp;&nbsp;&nbsp; [neg?](#neg)&nbsp;&nbsp;&nbsp; [odd?](#odd)&nbsp;&nbsp;&nbsp; [pi](#pi)&nbsp;&nbsp;&nbsp; [pos?](#pos)&nbsp;&nbsp;&nbsp; [rad/deg](#raddeg)&nbsp;&nbsp;&nbsp; [rad/turn](#radturn)&nbsp;&nbsp;&nbsp; [random](#random)&nbsp;&nbsp;&nbsp; [random\_int](#random\_int)&nbsp;&nbsp;&nbsp; [range](#range)&nbsp;&nbsp;&nbsp; [round](#round)&nbsp;&nbsp;&nbsp; [sin](#sin)&nbsp;&nbsp;&nbsp; [sqrt](#sqrt)&nbsp;&nbsp;&nbsp; [sqrt/safe](#sqrtsafe)&nbsp;&nbsp;&nbsp; [square](#square)&nbsp;&nbsp;&nbsp; [sub](#sub)&nbsp;&nbsp;&nbsp; [sum\_of_squares](#sum\_of_squares)&nbsp;&nbsp;&nbsp; [tan](#tan)&nbsp;&nbsp;&nbsp; [tau](#tau)&nbsp;&nbsp;&nbsp; [turn/deg](#turndeg)&nbsp;&nbsp;&nbsp; [turn/rad](#turnrad)&nbsp;&nbsp;&nbsp; [zero?](#zero)
+[abs](#abs)&nbsp;&nbsp;&nbsp; [add](#add)&nbsp;&nbsp;&nbsp; [angle](#angle)&nbsp;&nbsp;&nbsp; [atan/2](#atan2)&nbsp;&nbsp;&nbsp; [between?](#between)&nbsp;&nbsp;&nbsp; [ceil](#ceil)&nbsp;&nbsp;&nbsp; [cos](#cos)&nbsp;&nbsp;&nbsp; [dec](#dec)&nbsp;&nbsp;&nbsp; [deg/rad](#degrad)&nbsp;&nbsp;&nbsp; [deg/turn](#degturn)&nbsp;&nbsp;&nbsp; [dist](#dist)&nbsp;&nbsp;&nbsp; [div](#div)&nbsp;&nbsp;&nbsp; [div/0](#div0)&nbsp;&nbsp;&nbsp; [div/safe](#divsafe)&nbsp;&nbsp;&nbsp; [even?](#even)&nbsp;&nbsp;&nbsp; [floor](#floor)&nbsp;&nbsp;&nbsp; [gt?](#gt)&nbsp;&nbsp;&nbsp; [gte?](#gte)&nbsp;&nbsp;&nbsp; [heading/vector](#headingvector)&nbsp;&nbsp;&nbsp; [inc](#inc)&nbsp;&nbsp;&nbsp; [inv](#inv)&nbsp;&nbsp;&nbsp; [inv/0](#inv0)&nbsp;&nbsp;&nbsp; [inv/safe](#invsafe)&nbsp;&nbsp;&nbsp; [lt?](#lt)&nbsp;&nbsp;&nbsp; [lte?](#lte)&nbsp;&nbsp;&nbsp; [max](#max)&nbsp;&nbsp;&nbsp; [min](#min)&nbsp;&nbsp;&nbsp; [mod](#mod)&nbsp;&nbsp;&nbsp; [mod/0](#mod0)&nbsp;&nbsp;&nbsp; [mod/safe](#modsafe)&nbsp;&nbsp;&nbsp; [mult](#mult)&nbsp;&nbsp;&nbsp; [neg](#neg)&nbsp;&nbsp;&nbsp; [neg?](#neg)&nbsp;&nbsp;&nbsp; [odd?](#odd)&nbsp;&nbsp;&nbsp; [pi](#pi)&nbsp;&nbsp;&nbsp; [pos?](#pos)&nbsp;&nbsp;&nbsp; [rad/deg](#raddeg)&nbsp;&nbsp;&nbsp; [rad/turn](#radturn)&nbsp;&nbsp;&nbsp; [random](#random)&nbsp;&nbsp;&nbsp; [random\_int](#random\_int)&nbsp;&nbsp;&nbsp; [range](#range)&nbsp;&nbsp;&nbsp; [round](#round)&nbsp;&nbsp;&nbsp; [sin](#sin)&nbsp;&nbsp;&nbsp; [sqrt](#sqrt)&nbsp;&nbsp;&nbsp; [sqrt/safe](#sqrtsafe)&nbsp;&nbsp;&nbsp; [square](#square)&nbsp;&nbsp;&nbsp; [sub](#sub)&nbsp;&nbsp;&nbsp; [sum\_of_squares](#sum\_of_squares)&nbsp;&nbsp;&nbsp; [tan](#tan)&nbsp;&nbsp;&nbsp; [tau](#tau)&nbsp;&nbsp;&nbsp; [to\_number](#to\_number)&nbsp;&nbsp;&nbsp; [turn/deg](#turndeg)&nbsp;&nbsp;&nbsp; [turn/rad](#turnrad)&nbsp;&nbsp;&nbsp; [zero?](#zero)
 
 ### Results
 [err](#err)&nbsp;&nbsp;&nbsp; [err?](#err)&nbsp;&nbsp;&nbsp; [ok](#ok)&nbsp;&nbsp;&nbsp; [ok?](#ok)&nbsp;&nbsp;&nbsp; [unwrap!](#unwrap)&nbsp;&nbsp;&nbsp; [unwrap\_or](#unwrap\_or)
@@ -65,7 +65,7 @@ You can see what this looks like in the last clause of `add`: `((x1, y1), (x2, y
 [any?](#any)&nbsp;&nbsp;&nbsp; [append](#append)&nbsp;&nbsp;&nbsp; [coll?](#coll)&nbsp;&nbsp;&nbsp; [concat](#concat)&nbsp;&nbsp;&nbsp; [contains?](#contains)&nbsp;&nbsp;&nbsp; [count](#count)&nbsp;&nbsp;&nbsp; [empty?](#empty)&nbsp;&nbsp;&nbsp; [omit](#omit)&nbsp;&nbsp;&nbsp; [random](#random)&nbsp;&nbsp;&nbsp; [set](#set)&nbsp;&nbsp;&nbsp; [set?](#set)
 
 ### Strings
-[any?](#any)&nbsp;&nbsp;&nbsp; [chars](#chars)&nbsp;&nbsp;&nbsp; [chars/safe](#charssafe)&nbsp;&nbsp;&nbsp; [concat](#concat)&nbsp;&nbsp;&nbsp; [count](#count)&nbsp;&nbsp;&nbsp; [downcase](#downcase)&nbsp;&nbsp;&nbsp; [empty?](#empty)&nbsp;&nbsp;&nbsp; [join](#join)&nbsp;&nbsp;&nbsp; [sentence](#sentence)&nbsp;&nbsp;&nbsp; [show](#show)&nbsp;&nbsp;&nbsp; [slice](#slice)&nbsp;&nbsp;&nbsp; [split](#split)&nbsp;&nbsp;&nbsp; [string](#string)&nbsp;&nbsp;&nbsp; [string?](#string)&nbsp;&nbsp;&nbsp; [strip](#strip)&nbsp;&nbsp;&nbsp; [trim](#trim)&nbsp;&nbsp;&nbsp; [upcase](#upcase)&nbsp;&nbsp;&nbsp; [words](#words)
+[any?](#any)&nbsp;&nbsp;&nbsp; [chars](#chars)&nbsp;&nbsp;&nbsp; [chars/safe](#charssafe)&nbsp;&nbsp;&nbsp; [concat](#concat)&nbsp;&nbsp;&nbsp; [count](#count)&nbsp;&nbsp;&nbsp; [downcase](#downcase)&nbsp;&nbsp;&nbsp; [empty?](#empty)&nbsp;&nbsp;&nbsp; [join](#join)&nbsp;&nbsp;&nbsp; [sentence](#sentence)&nbsp;&nbsp;&nbsp; [show](#show)&nbsp;&nbsp;&nbsp; [slice](#slice)&nbsp;&nbsp;&nbsp; [split](#split)&nbsp;&nbsp;&nbsp; [string](#string)&nbsp;&nbsp;&nbsp; [string?](#string)&nbsp;&nbsp;&nbsp; [strip](#strip)&nbsp;&nbsp;&nbsp; [to\_number](#to\_number)&nbsp;&nbsp;&nbsp; [trim](#trim)&nbsp;&nbsp;&nbsp; [upcase](#upcase)&nbsp;&nbsp;&nbsp; [words](#words)
 
 ### Tuples
 [any?](#any)&nbsp;&nbsp;&nbsp; [at](#at)&nbsp;&nbsp;&nbsp; [coll?](#coll)&nbsp;&nbsp;&nbsp; [count](#count)&nbsp;&nbsp;&nbsp; [empty?](#empty)&nbsp;&nbsp;&nbsp; [first](#first)&nbsp;&nbsp;&nbsp; [last](#last)&nbsp;&nbsp;&nbsp; [ordered?](#ordered)&nbsp;&nbsp;&nbsp; [rest](#rest)&nbsp;&nbsp;&nbsp; [second](#second)&nbsp;&nbsp;&nbsp; [tuple?](#tuple)
diff --git a/src/doc.janet b/src/doc.janet
index 43d8458..c7ec684 100644
--- a/src/doc.janet
+++ b/src/doc.janet
@@ -23,13 +23,13 @@
  (string/join (map toc-entry sorted-names) "&nbsp;&nbsp;&nbsp; "))
 
 (def topics {
- "math" ["abs" "add" "angle" "atan/2" "between?" "ceil" "cos" "dec" "deg/rad" "deg/turn" "dist" "div" "div/0" "div/safe" "even?" "floor" "gt?" "gte?" "heading/vector" "inc" "inv" "inv/0" "inv/safe" "lt?" "lte?" "max" "min" "mod" "mod/0" "mod/safe" "mult" "neg" "neg?" "odd?" "pi" "pos?" "rad/deg" "rad/turn" "random" "random_int" "range" "round" "sin" "sqrt" "sqrt/safe" "square" "sub" "sum_of_squares" "tan" "tau" "turn/deg" "turn/rad" "zero?"]
+ "math" ["abs" "add" "angle" "atan/2" "between?" "ceil" "cos" "dec" "deg/rad" "deg/turn" "dist" "div" "div/0" "div/safe" "even?" "floor" "gt?" "gte?" "heading/vector" "inc" "inv" "inv/0" "inv/safe" "lt?" "lte?" "max" "min" "mod" "mod/0" "mod/safe" "mult" "neg" "neg?" "odd?" "pi" "pos?" "rad/deg" "rad/turn" "random" "random_int" "range" "round" "sin" "sqrt" "sqrt/safe" "square" "sub" "sum_of_squares" "tan" "tau" "to_number" "turn/deg" "turn/rad" "zero?"]
  "boolean" ["and" "bool" "bool?" "false?" "not" "or" "true?"]
  "dicts" ["any?" "assoc" "assoc?" "coll?" "count" "dict" "dict?" "diff" "dissoc" "empty?" "get" "keys" "random" "update" "values"]
  "lists" ["any?" "append" "at" "butlast" "coll?" "concat" "count" "each!" "empty?" "filter" "first" "fold" "join" "keep" "last" "list" "list?" "map" "ordered?" "random" "range" "rest" "second" "sentence" "slice"]
  "sets" ["any?" "append" "coll?" "concat" "contains?" "count" "empty?" "omit" "random" "set" "set?"]
  "tuples" ["any?" "at" "coll?" "count" "empty?" "first" "last" "ordered?" "rest" "second" "tuple?"]
- "strings" ["any?" "chars" "chars/safe" "concat" "count" "downcase" "empty?" "join" "sentence" "show" "slice" "split" "string" "string?" "strip" "trim" "upcase" "words"]
+ "strings" ["any?" "chars" "chars/safe" "concat" "count" "downcase" "empty?" "join" "sentence" "show" "slice" "split" "string" "string?" "strip" "to_number" "trim" "upcase" "words"]
  "types and values" ["assoc?" "bool?" "box?" "coll?" "dict?" "eq?" "fn?" "keyword?" "list?" "neq?" "nil?" "number?" "ordered?" "set?" "show" "some" "some?" "string?" "tuple?" "type"]
  "boxes and state" ["box?" "unbox" "store!" "update!"]
  "results" ["err" "err?" "ok" "ok?" "unwrap!" "unwrap_or"]