Re: Removing Dictionary Elements
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- Subject: Re: Removing Dictionary Elements
- From: Romulo Bahiense <romulo@...>
- Date: 2005年4月19日 20:50:13 -0300
(...). I'm getting caught, however, when it comes to deleting elements
> from the table. (...)
Just assign 'nil' to the desired key:
local t = { a = 1, b = 2 }
print(t.a, t.b)
> 1 2
t.a = nil
print(t.a, t.b)
> nil 2
While I'm asking questions, I wonder if perhaps there is a better way
to save the table to a file. (...)
It depends on what you want to save and how to save. I use this
function which solves most of my needs (specially for debugging):
function serialize(value)
local t = type(value)
if t=='string' then return string.format('%q',value)
elseif t=='number' then return tostring(value)
elseif t=='boolean' then return value and 'true' or 'false'
elseif t=='table' then
local buf = '{'
for key,val in pairs(value) do
buf = buf..'['..serialize(key)..']='..serialize(val)..','
end
return buf .. '}'
else return '!UNKNOW!' -- here you could handle userdata...
end
end
--rb