Lua script to call coinmarketcap.com api for cryptocurrency info/ticker

gimme-them-coins.lua

local json = require("json")

function command(cmd, raw)
    local f = assert(io.popen(cmd, 'r'))
    local s = assert(f:read('*a'))
    f:close()
    if raw then return s end
        s = string.gsub(s, '^%s+', '')
        s = string.gsub(s, '%s+$', '')
        s = string.gsub(s, '[\n\r]+', ' ')
    return s
end

local res = command("curl -s 'https://api.coinmarketcap.com/v1/ticker/?limit=2'")
local o = json.decode(res)
local eth = o[2]

print(eth["name"], eth["price_usd"])