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