Function logf()

Insert a formated record into the socket's event log. Suitable for debugging purposes.

nil logf(message)

Parameters

• string message will be inserted into the event log. Can use tokens described below. The tokens will be replaced by following parameters (variable arguments).

Tokens

• %d is substituted by following argument as a number
• %s is substituted by following argument as a number

There is no %b token to display boolean values. To display boolean x as a number, use 'x and 1 or 0' idiom (true as 1, false as 0).

Return value

nil

Usage

local a = 42
local b = false
local c = "Hello";

-- displays 'test: 42, 0, Hello.'
log("test: %d, %d, %s.", a, b and 1 or 0, c)

See also

• log() to display unformatted string and system properties