Attempt to index local 'hex' (a nil value)

Solar2D General Questions/Discussion
#21

Yes

#22

Can you post your current code. Please click on the blue <> button and paste the code into that windows please.

Thanks

Rob

#23 
local physics = require( "physics" ) physics.start() display.setDefault("background", 1, 0, 0) function randomcolor() colorlist = { "#27ae60", "#e74c3c", "#e74c3c", "#34495e", "#7f8c8d" } &nbsp; choosecolor = colorlist[math.random(1,5)] end function convHexColor(hex) &nbsp; local r = hex:sub(1, 2) &nbsp; local g = hex:sub(3, 4) &nbsp; local b = hex:sub(5, 6) &nbsp; return tonumber(r, 16), tonumber(g, 16), tonumber(b, 16) end &nbsp;local bombstartnew = display.newRect( 150, -340, 50, 50) physics.addBody( bombstartnew ) bombstartnew.enterFrame = offscreen &nbsp; &nbsp; &nbsp; &nbsp;bombstartnew:setFillColor( convHexColor( randomcolor )) Runtime:addEventListener( "enterFrame", bombstartnew ) end timer.performWithDelay( 500, addnewobject, 0 )
#24

The way you have this:

bombstartnew:setFillColor( convHexColor( randomcolor ))

you are passing the address of the function randomcolor() to convHexColor. The address of a function is a number (memory address) not a string of hex codes.

Perhaps you meant to do:

bombstartnew:setFillColor( convHexColor( randomcolor()  ))

where you actually call the function randomcolor() with the hopes that it would return you a value, but that still won’t work because the function randomcolor() sets a variable but doesn’t actually return anything.

A rewrite of randomcolor() to be:

function randomcolor() local colorlist = { "#27ae60", "#e74c3c", "#e74c3c", "#34495e", "#7f8c8d" } local choosecolor = colorlist[math.random(1,5)] return choosecolor end

would solve that and then:

bombstartnew:setFillColor( convHexColor( randomcolor() ) )

would likely do what you need it to do.

Rob

#25

Still get the same error and same line

here is code

local physics = require( "physics" ) physics.start() display.setDefault("background", 1, 0, 0) function randomcolor() local colorlist = { "#27ae60", "#e74c3c", "#e74c3c", "#34495e", "#7f8c8d" } local choosecolor = colorlist[math.random(1,5)] return choosecolor end function convHexColor(hex) local r = hex:sub(1, 2) local g = hex:sub(3, 4) local b = hex:sub(5, 6) return tonumber(r, 16), tonumber(g, 16), tonumber(b, 16) end function addnewobject() local bombstartnew = display.newRect( 150, -340, 50, 50) physics.addBody( bombstartnew ) bombstartnew.enterFrame = offscreen bombstartnew:setFillColor( convHexColor( randomcolor ) ) Runtime:addEventListener( "enterFrame", bombstartnew ) end timer.performWithDelay( 500, addnewobject , 0 )
#26

ok it now works without error but the object is blue and when i put print(randomcolor) i get function: 0x7faac32f2fb0 instead of a hex value

#27

Because you are still passing the address of the function, not the return value.  Please change this line to read:

bombstartnew:setFillColor( convHexColor( randomcolor() ) )  --<— see the added parenthesis?