use pairs() not userdata:pairs()

ide/templates/ide/initial-bot.lua

@@ -29,7 +29,7 @@ function step()
     -- with a mass of at least 0.8 ordered by food value, decreasing
 
     -- you can iterate over the result:
-    for i, item in food:pairs() do
+    for i, item in pairs(food) do
 
         -- distance of the food item, relative to the center of your head
         local distance = item.dist
@@ -51,7 +51,7 @@ function step()
     -- in return, you get a list of
     -- all snake segments nearer than 100 to your head,
     -- in this case not including your own segments:
-    for i, item in segments:pairs() do
+    for i, item in pairs(segments) do
 
         -- id of the bot the segment belongs to
         -- (you can compare this to self.id)
@@ -59,7 +59,82 @@ function step()
 
         -- distance to the center of the segment
         local distance = item.dist
+--- WELCOME TO YOUR FIRST SNAKE!
+-- It is programmed in the Lua language. If you didn't used
+-- it until now, ask us or visit https://www.lua.org/manual/5.3/.
+--
+-- You can edit this code, save and run it.
+-- You should see log output at the bottom of this page,
+-- and a live view on your snake's wellbeing on the right
+
+--- init() is called once upon creation of the bot
+-- initialize your data here, and maybe set colors for your snake
+function init()
+    self.colors = { 0xFF0000, 0x808080 }
+end
+
+--- step() is called once every frame, maybe up to 60 times per second.
+-- implement your game logic here.
+-- after deciding what your bot should do next,
+-- just return the desired steering angle.
+-- a negative angle means turn left and a positive angle means turn right.
+-- with 0, the snake keeps its current direction.
+function step()
+    -- there is some info in the "self" object, e.g. your current head/segment radius
+    local own_radius = self.segment_radius
+
+    -- your snake needs food to grow
+    -- to find food in your head's surroundings, call something like that:
+    local food = findFood(100, 0.8)
+    -- this will give you all food in maximum distance of 100 around your head,
+    -- with a mass of at least 0.8 ordered by food value, decreasing
+
+    -- you can iterate over the result:
+    for i, item in pairs(food) do
+
+        -- distance of the food item, relative to the center of your head
+        local distance = item.dist
+
+        -- direction to the food item, in radians (-math.pi .. +math.pi)
+        -- 0 means "straight ahead", math.pi means "right behind you"
+        local direction = item.d
 
+        -- mass of the food item. you will grow this amount if you eat it.
+        -- realistic values are 0 - 4
+        local value = item.v
+
+	end
+
+    -- you should also look out for your enemies.
+    -- to find snake segments around you, call:
+    local segments = findSegments(100, false)
+
+    -- in return, you get a list of
+    -- all snake segments nearer than 100 to your head,
+    -- in this case not including your own segments:
+    for i, item in pairs(segments) do
+
+        -- id of the bot the segment belongs to
+        -- (you can compare this to self.id)
+        local bot = item.bot
+
+        -- distance to the center of the segment
+        local distance = item.dist
+
+        -- direction to the segment, in radians (-math.pi .. +math.pi)
+        local direction = item.d
+
+        -- radius of the segment
+        local radius = item.r
+
+        if distance<10 then
+            -- you can send some log output to the web IDE, but it's rate limited.
+            log(string.format("oh no, i'm going to die. distance: %.4f!", distance))
+        end
+	end
+
+    return 0.002 -- this will lead us in a large circle, clockwise.
+end
         -- direction to the segment, in radians (-math.pi .. +math.pi)
         local direction = item.d