Almost done drawing lines

config.lua

@@ -9,7 +9,10 @@ Config = {
 
     -- love2d line drawing settings
     lineStyle = "smooth",
-    lineWidth = 5
+    lineWidth = 5,
+
+    -- drag sensivity, px
+    dragSensivity = 5
 }
 
 -- Colors table
@@ -19,3 +22,23 @@ Color = {
     green = { 0, 1, 0 },
     blue = { 0, 0, 1 }
 }
+
+-- Find key by value in table by predicate
+function tableFind( table, value, pred )
+    for key, innervalue in pairs( table ) do
+        if pred( value, innervalue ) then
+            return key
+        end
+    end
+    return nil
+end
+
+-- Find if value exists in table by predicate
+function tableHas( table, value, pred )
+    for key, innervalue in pairs( table ) do
+        if pred( value, innervalue ) then
+            return true
+        end
+    end
+    return false
+end