Lua - load properties into table
I would like to load a config.lua file containing global variables so that I can wrap and then access those variables into a local table.
config.lua looks like this:
prop01=value01
prop02=value02
script.lua would look like this
-- fragment starts --
local config = {
-- something goes here
}
-- fragment end --
print (config.prop01) -- should print "value01"
print (config.prop02) -- should print "value02"
How can I change the "fragment" to get expected printout?
properties lua
asked Nov 24 '18 at 14:20
mpalmier73mpalmier73
102
add a comment |
I would like to load a config.lua file containing global variables so that I can wrap and then access those variables into a local table.
config.lua looks like this:
prop01=value01
prop02=value02
script.lua would look like this
-- fragment starts --
local config = {
-- something goes here
}
-- fragment end --
print (config.prop01) -- should print "value01"
print (config.prop02) -- should print "value02"
How can I change the "fragment" to get expected printout?
properties lua
asked Nov 24 '18 at 14:20
mpalmier73mpalmier73
102
add a comment |
I would like to load a config.lua file containing global variables so that I can wrap and then access those variables into a local table.
config.lua looks like this:
prop01=value01
prop02=value02
script.lua would look like this
-- fragment starts --
local config = {
-- something goes here
}
-- fragment end --
print (config.prop01) -- should print "value01"
print (config.prop02) -- should print "value02"
How can I change the "fragment" to get expected printout?
properties lua
asked Nov 24 '18 at 14:20
mpalmier73mpalmier73
102
I would like to load a config.lua file containing global variables so that I can wrap and then access those variables into a local table.
config.lua looks like this:
prop01=value01
prop02=value02
script.lua would look like this
-- fragment starts --
local config = {
-- something goes here
}
-- fragment end --
print (config.prop01) -- should print "value01"
print (config.prop02) -- should print "value02"
How can I change the "fragment" to get expected printout?
properties lua
properties lua
asked Nov 24 '18 at 14:20
mpalmier73mpalmier73
102
asked Nov 24 '18 at 14:20
mpalmier73mpalmier73
102
asked Nov 24 '18 at 14:20
mpalmier73mpalmier73
102
asked Nov 24 '18 at 14:20
mpalmier73mpalmier73
102
asked Nov 24 '18 at 14:20
mpalmier73mpalmier73
102
102
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Swap the environment when loading the config file.
In lua 5.3 it is done using functions load or loadfile documented here:
local config={}
local config_init_fun = loadfile('config.lua',"configuration file",config)
config_init_fun()
In lua 5.1 you will need to use setfenv function:
local config={}
local config_init_fun = loadfile('config.lua',"configuration file")
config_init_fun = setfenv (config_init_fun, config)
config_init_fun()
The assignment of setfenv result might be unnecessary but I don't have lua5.1 at hand to verify that.
All that assuming that config.lua is a valid script that is setting some global variables.
answered Nov 24 '18 at 15:35
DimitryDimitry
9591516
Your solution works for me. I'm using Lua 5.1.5 and confirm that setfenv is necessary. Thanks!
– mpalmier73
Nov 24 '18 at 17:28
The remark is not aboutsetfenvitself, it is needed without a doubt. What I don't know is whethersetfenvalters the passed function or creates copy. That is, canfun=setfenv( fun, env )be replaced by simplysetfenv( fun, env )? Probably it can, but I did not test that.
– Dimitry
Nov 25 '18 at 0:25
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Swap the environment when loading the config file.
In lua 5.3 it is done using functions load or loadfile documented here:
local config={}
local config_init_fun = loadfile('config.lua',"configuration file",config)
config_init_fun()
In lua 5.1 you will need to use setfenv function:
local config={}
local config_init_fun = loadfile('config.lua',"configuration file")
config_init_fun = setfenv (config_init_fun, config)
config_init_fun()
The assignment of setfenv result might be unnecessary but I don't have lua5.1 at hand to verify that.
All that assuming that config.lua is a valid script that is setting some global variables.
answered Nov 24 '18 at 15:35
DimitryDimitry
9591516
Your solution works for me. I'm using Lua 5.1.5 and confirm that setfenv is necessary. Thanks!
– mpalmier73
Nov 24 '18 at 17:28
The remark is not aboutsetfenvitself, it is needed without a doubt. What I don't know is whethersetfenvalters the passed function or creates copy. That is, canfun=setfenv( fun, env )be replaced by simplysetfenv( fun, env )? Probably it can, but I did not test that.
– Dimitry
Nov 25 '18 at 0:25
add a comment |
Swap the environment when loading the config file.
In lua 5.3 it is done using functions load or loadfile documented here:
local config={}
local config_init_fun = loadfile('config.lua',"configuration file",config)
config_init_fun()
In lua 5.1 you will need to use setfenv function:
local config={}
local config_init_fun = loadfile('config.lua',"configuration file")
config_init_fun = setfenv (config_init_fun, config)
config_init_fun()
The assignment of setfenv result might be unnecessary but I don't have lua5.1 at hand to verify that.
All that assuming that config.lua is a valid script that is setting some global variables.
answered Nov 24 '18 at 15:35
DimitryDimitry
9591516
Your solution works for me. I'm using Lua 5.1.5 and confirm that setfenv is necessary. Thanks!
– mpalmier73
Nov 24 '18 at 17:28
The remark is not aboutsetfenvitself, it is needed without a doubt. What I don't know is whethersetfenvalters the passed function or creates copy. That is, canfun=setfenv( fun, env )be replaced by simplysetfenv( fun, env )? Probably it can, but I did not test that.
– Dimitry
Nov 25 '18 at 0:25
add a comment |
Swap the environment when loading the config file.
In lua 5.3 it is done using functions load or loadfile documented here:
local config={}
local config_init_fun = loadfile('config.lua',"configuration file",config)
config_init_fun()
In lua 5.1 you will need to use setfenv function:
local config={}
local config_init_fun = loadfile('config.lua',"configuration file")
config_init_fun = setfenv (config_init_fun, config)
config_init_fun()
The assignment of setfenv result might be unnecessary but I don't have lua5.1 at hand to verify that.
All that assuming that config.lua is a valid script that is setting some global variables.
answered Nov 24 '18 at 15:35
DimitryDimitry
9591516
Swap the environment when loading the config file.
In lua 5.3 it is done using functions load or loadfile documented here:
local config={}
local config_init_fun = loadfile('config.lua',"configuration file",config)
config_init_fun()
In lua 5.1 you will need to use setfenv function:
local config={}
local config_init_fun = loadfile('config.lua',"configuration file")
config_init_fun = setfenv (config_init_fun, config)
config_init_fun()
The assignment of setfenv result might be unnecessary but I don't have lua5.1 at hand to verify that.
All that assuming that config.lua is a valid script that is setting some global variables.
answered Nov 24 '18 at 15:35
DimitryDimitry
9591516
answered Nov 24 '18 at 15:35
DimitryDimitry
9591516
answered Nov 24 '18 at 15:35
DimitryDimitry
9591516
answered Nov 24 '18 at 15:35
DimitryDimitry
9591516
9591516
Your solution works for me. I'm using Lua 5.1.5 and confirm that setfenv is necessary. Thanks!
– mpalmier73
Nov 24 '18 at 17:28
The remark is not aboutsetfenvitself, it is needed without a doubt. What I don't know is whethersetfenvalters the passed function or creates copy. That is, canfun=setfenv( fun, env )be replaced by simplysetfenv( fun, env )? Probably it can, but I did not test that.
– Dimitry
Nov 25 '18 at 0:25
add a comment |
Your solution works for me. I'm using Lua 5.1.5 and confirm that setfenv is necessary. Thanks!
– mpalmier73
Nov 24 '18 at 17:28
The remark is not aboutsetfenvitself, it is needed without a doubt. What I don't know is whethersetfenvalters the passed function or creates copy. That is, canfun=setfenv( fun, env )be replaced by simplysetfenv( fun, env )? Probably it can, but I did not test that.
– Dimitry
Nov 25 '18 at 0:25
Your solution works for me. I'm using Lua 5.1.5 and confirm that setfenv is necessary. Thanks!
– mpalmier73
Nov 24 '18 at 17:28
Your solution works for me. I'm using Lua 5.1.5 and confirm that setfenv is necessary. Thanks!
– mpalmier73
Nov 24 '18 at 17:28
The remark is not about
setfenv itself, it is needed without a doubt. What I don't know is whether setfenv alters the passed function or creates copy. That is, can fun=setfenv( fun, env ) be replaced by simply setfenv( fun, env )? Probably it can, but I did not test that.– Dimitry
Nov 25 '18 at 0:25
The remark is not about
setfenv itself, it is needed without a doubt. What I don't know is whether setfenv alters the passed function or creates copy. That is, can fun=setfenv( fun, env ) be replaced by simply setfenv( fun, env )? Probably it can, but I did not test that.– Dimitry
Nov 25 '18 at 0:25
add a comment |
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