buildset

function buildset( arr ) --> res

Description

Creates a set with the values in the array table arr as indices. All values in the set are true.

Parameters

arr

An array table with the indices of the set.

Return Values

res

A dictionary table where all existing values are true.

Code

--ZFUNC-buildset-v1
local function buildset( arr )
   local res = {}
   for _, v in ipairs( arr ) do res[ v ] = true end
   return res
end

return buildset

Examples

local t = require( "tapered" )
local buildset = require( "buildset" )

keywords = buildset{ "while", "end", "function", "local" }

t.ok( keywords[ "function" ] )
t.nok( keywords[ "class" ] )

t.done()

Inspired by