Lua传递多维数组

Question

嗨，我是一个相当新的Lua程序员，我正在尝试将参数传递给多维数组，但我一直得到一个nil值错误。

我有一个多维数组：

local transform = {
  forward = {
    distance = 1,
    swing = robot.swing,
    move = robot.forward
  },
  left = {
    distance = 1,
    swing = robot.swing,
    move = robot.forward
  },
  down = {
    distance = 1,
    swing = robot.swingDown,
    move = robot.down
  }
}

我想尝试传递数组的部分内容：

function testFunc(transform, direction)
  print(transform.direction.distance)
end

myFunc(transform, forward)

Answer 1

表达式transform.direction在transform中查找其键为＆＃34; direction＆＃34;的值。如果您想要其键值为direction变量的值，请改用transform[direction]：

function testFunc(transform, direction)
  print(transform[direction].distance)
end