stdlib 41.2.2

• Index

Contents

• Functions

Modules

• std
• std.debug
• std.functional
• std.io
• std.math
• std.operator
• std.package
• std.strict
• std.string
• std.table

Classes

• std.tree
• std.container
• std.object
• std.list
• std.optparse
• std.set
• std.strbuf

Module std.math

Additions to the core math module.

The module table returned by std.math also contains all of the entries from the core math table. An hygienic way to import this module, then, is simply to override the core math locally:

local math = require "std.math"

Functions

Functions

floor (n[, p=0])

Extend math.floor to take the number of decimal places.

Parameters:

• n number number
• p int number of decimal places to truncate to (default 0)

Returns:

number n truncated to p decimal places

Usage:

tenths = floor (magnitude, 1)

monkey_patch ([namespace=_G])

Overwrite core math methods with std enhanced versions.

Parameters:

• namespace table where to install global functions (default _G)

Returns:

table the module table

Usage:

require "std.math".monkey_patch ()

round (n[, p=0])

Round a number to a given number of decimal places

Parameters:

• n number number
• p int number of decimal places to round to (default 0)

Returns:

number n rounded to p decimal places

Usage:

roughly = round (exactly, 2)