How to detect lower element from a table?

Solar2D General Questions/Discussion
#1

Hello guys

I ve a problem. I ve a table like this

local Table = {} Table[1] = { x=200 } Table[2] = { x=259 } Table[3] = { x=-50} Table[4] = { x=150 } Table[5] = { x=-200 } Table[6] = { 170} Table[7] = { x=50} Table[8] = { x= -150 }

My task is to create a function that detect which is the element with the lower “x”.
 How can I do this?

#2

You could either sort the table in order of x:

[lua]

local function sortTable(t)

    function compare(a, b)

        return a.x < b.x

    end

    table.sort(t, compare)

end

sortTable(myTable)

[/lua]

 

Or just loop through all the elements and compare the X values:

 

[lua]

 

local function findLowest (t)

      local lowestX = 9999

      local lowestElement

      for i = 1, #t, 1 do

           

            if t[i].x < lowestX then

                 

                  lowestElement = i

            end

      end

      return lowestElement

end

 

local lowestX = findLowest(myTable)

 

[/lua]

 

You probably don’t want to be calling your table ‘Table’ because that table contains some useful functions (i.e. table.sort) that won’t be accessible if you do.

 

 

 

#3

You could either sort the table in order of x:

[lua]

local function sortTable(t)

    function compare(a, b)

        return a.x < b.x

    end

    table.sort(t, compare)

end

sortTable(myTable)

[/lua]

 

Or just loop through all the elements and compare the X values:

 

[lua]

 

local function findLowest (t)

      local lowestX = 9999

      local lowestElement

      for i = 1, #t, 1 do

           

            if t[i].x < lowestX then

                 

                  lowestElement = i

            end

      end

      return lowestElement

end

 

local lowestX = findLowest(myTable)

 

[/lua]

 

You probably don’t want to be calling your table ‘Table’ because that table contains some useful functions (i.e. table.sort) that won’t be accessible if you do.