---
layout: doc
title: STDLIB
---
## arrays
* [reduce](arrays/reduce)
## db
* [database](db/database)
* [database_zh](db/database_zh)
## mappings
* [element_of_weighted](mappings/element_of_weighted)
## numbers
* [array_sum](numbers/array_sum)
* [percent](numbers/percent)
* [percent_of](numbers/percent_of)
* [sum](numbers/sum)
## objects
* [all_environment](objects/all_environment)
* [present_clone](objects/present_clone)
## string
* [base64decode](string/base64decode)
* [base64encode](string/base64encode)
* [bitmap_font](string/bitmap_font)
* [break_string](string/break_string)
