lua tables

[philnelson]

This is a lua question, but I assume it will be of use to new love2d people, also.

In PHP (the language I am most familiar with) I can, for example, create an multidimentional arrays like this:

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array[1]['field'] = "a value"

, and then simply refer to it as

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array[1]['field']

in order to get "a value". How can I accomplish this in lua? I've tried

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t[1] = {key='value'}

, which seems to set the value but I cannot then get the value by saying

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t[1].key

or similar.

Am I just doing this backwards? Is there a simpler way? I am willing to accept that I'm coming at this the wrong way for this language.

[osgeld]

you dont have to set the number when declaring it so

table = {key = "blah"}

is table.key when retrieving it

now if you did

table = {"foo", "bar"}

you would use table[1] or table[2] cause you didnt assign a variable name, which can be mixed, sorta

table = { {key = "foo", value = "bar"}, {item = "gun", ammo = 100}}

the above has 2 unnamed tables, with named contents all in 1 table, so if i wanted to get ammo

table[2].ammo

[philnelson]

The key is significant to the operation I'm doing. It is a unique ID that is generated elsewhere.

[osgeld]

i added alot since you posted

and heres the big book of plain lua

http://www.lua.org/manual/5.1/

[Inny]

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t = {}
t[1]={}
t[1].key = value

or

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t = { {["key"]=value}

[osuf oboys]

This is a lua question, but I assume it will be of use to new love2d people, also.

In PHP (the language I am most familiar with) I can, for example, create an multidimentional arrays like this:

Code: Select all

array[1]['field'] = "a value"

, and then simply refer to it as

Code: Select all

array[1]['field']

in order to get "a value". How can I accomplish this in lua? I've tried

Code: Select all

t[1] = {key='value'}

, which seems to set the value but I cannot then get the value by saying

Code: Select all

t[1].key

or similar.

Am I just doing this backwards? Is there a simpler way? I am willing to accept that I'm coming at this the wrong way for this language.

t[1] = {key='value1'} is correct but is inconsistent with t[1].key, which seems to indicate that there is a single key. If so, then you can use {key, value} as suggested by other posters. If you wish to store multiple values in t[1], then you may iterate the keys and values of t[1] with for k,v in pairs(t[1]).

[bartbes]

Code: Select all

t[1] = {key='value'}

, which seems to set the value but I cannot then get the value by saying

Code: Select all

t[1].key

or similar.

It works? Copied from lua interactive interpreter:

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> t = {}
> t[1] = { key = "value" }
> print(t[1].key)
value