I created a script for the game Garry's Mod, but once is loaded on some servers, it gets the next error:
[ERROR] addons/ulib-master/lua/ulib/shared/hook.lua:110: addons/applysystem/lua/applysystem/init.lua:13: bad argument #1 to 'pairs' (table expected, got nil)
fn - [C]:-1
unknown - addons/ulib-master/lua/ulib/shared/hook.lua:110
How can i fix it? this is the line 13:
for _, row in pairs(results[1].data) do
If needed, theres the entire function where the error is created:
db:Query("SELECT * FROM "..ApplySystem.MySQL.TableName.." WHERE delivered=0 AND status='Accepted.'", function(results)
for _, row in pairs(results[1].data) do
local steamid64 = row.steamid
if steamid64 != "" or steamid64 != nil then
local TransfSteamID = util.SteamIDFrom64(steamid64)
RunConsoleCommand("ulx","adduserid",TransfSteamID,ApplySystem.MySQL.DefaultRank)
db:Query("UPDATE "..ApplySystem.MySQL.TableName.." SET delivered=1 WHERE steamid='"..row.steamid.."' ")
end
end
end)
Fixed, thanks guys, it was because i were trying to retrieve nil values.
Related
I'm trying to solve a task where I must to find one file with data in CSV format among other files with similar names and same size and print a number on 5th row 3rd column (indexes 4 and 2)
So I wrote this code
package main
import (
"encoding/csv"
"fmt"
"os"
"path/filepath"
)
var s [][]string
func walkfunc(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
buf, err1 := os.Open(path)
if err1 == nil {
var err2 error
r := csv.NewReader(buf)
s, err2 = r.ReadAll()
if err2 == nil {
fmt.Printf("found: %v", s[4][2])
}
}
defer buf.Close()
return nil
}
func main() {
const root = "./task/"
if err := filepath.Walk(root, walkfunc); err != nil {
fmt.Printf("error: %v", err)
}
}
And I got this in output
GOROOT=/usr/local/go #gosetup
GOPATH=/usr/local/go/bin #gosetup
/usr/local/go/bin/go build -o /private/var/folders/j2/ybr0drz13yq31dc67zmvkb1w0000gn/T/GoLand/___go_build_qwasd3_go /Users/user/Downloads/zadacha/qwasd3.go #gosetup
/private/var/folders/j2/ybr0drz13yq31dc67zmvkb1w0000gn/T/GoLand/___go_build_qwasd3_go
panic: runtime error: index out of range [4] with length 3
goroutine 1 [running]:
main.walkfunc({0x14000018120?, 0x0?}, {0x14000098d88?, 0x10247fe40?}, {0x0?, 0x0?})
/Users/user/Downloads/zadacha/qwasd3.go:23 +0x28c
path/filepath.walk({0x14000018120, 0xe}, {0x1024c9cf8, 0x140000685b0}, 0x1024c9338)
/usr/local/go/src/path/filepath/path.go:433 +0xd0
path/filepath.walk({0x10248d4a8, 0x7}, {0x1024c9cf8, 0x140000684e0}, 0x1024c9338)
/usr/local/go/src/path/filepath/path.go:457 +0x1fc
path/filepath.Walk({0x10248d4a8, 0x7}, 0x1024c9338)
/usr/local/go/src/path/filepath/path.go:520 +0x6c
main.main()
/Users/user/Downloads/zadacha/qwasd3.go:37 +0x30
Process finished with the exit code 2
What am I doing wrong?
I was trying to run this code on MacBook.
The needed file contains table with numbers and I need to print a number on 5th row and 3rd column.
As other comments have pointed out, you need to check each CSV to make sure it's actually as big as you expect it to be. You could also add a simple check to try and make sure it's a CSV file before opening it by looking for a ".csv" extension.
Though, to directly address your error... The CSV reader may be able to interpret a plain txt file as CSV and not return an err, like:
buf := strings.NewReader(`A regular text file with 3 lines.
Line2
Line3
`)
r := csv.NewReader(buf)
records, err := r.ReadAll()
if err != nil {
fmt.Println("could not read all of CSV file!")
return err
}
fmt.Println(records)
prints:
[[A regular text file with 3 lines.] [Line2] [Line3]]
Just assuming that it's a CSV with the correct number of rows and columns:
fmt.Println("found", records[4][2])
gives the panic message you shared:
panic: runtime error: index out of range [4] with length 3
You at least need to check that your CSV has 5 rows, and if it does, then check if the 5th row has 3 columns before you try to read that field:
if len(records) < 5 {
fmt.Println(path, "does not have 5 rows")
return nil
}
if len(records[4]) < 3 {
fmt.Println(path, "5th row does not have 3 columns")
return nil
}
fmt.Println("found", records[4][2])
You could also do, inside your walkfunc, a basic check of the file path itself to see if it looks like a CSV:
if strings.ToLower(path[len(path)-4:]) != ".csv" {
fmt.Println(path, "is not a CSV")
return nil
}
I show all this code, plus a fully worked/integrated example in this Playground.
Hey guys This is my first lua script, its a speedhack for a game (offline dont worry) and i keep getting an error with the function name, im not sure what to fix exactly.
function Speedhack1()
boost = 1.5
if (readbytes{'[_speed]') `- nil) then
writeFloat ('[_speed]+DC', readFloat('[_speed]+DC')*boost)
writeFloat ('[_speed]+E0', readFloat('[_speed]+E0')*boost)
writeFloat ('[_speed]+E4', readFloat('[_speed]+E4')*boost)
end
end
createHotkey(speedhack1, VK_UP)
function Speedhack2()
boost = 0.5
if (readbytes{'[_speed]') `- nil) then
writeFloat ('[_speed]+DC', readFloat('[_speed]+DC')*boost)
writeFloat ('[_speed]+E0', readFloat('[_speed]+E0')*boost)
writeFloat ('[_speed]+E4', readFloat('[_speed]+E4')*boost)
end
end
createHotkey(speedhack2, VK_DOWN)
This is the error it throws back at me when trying to execute:
Error in script Script 1 : [string "function Speedhack1()
..."]:3: '}' expected near ')'
when i try to replace ")" with "}" it just yells at me the reverse. very confused lol
I think the issue is the curly braces in "readbytes{". Could you please try to replace that with "("?
The code that causes the error here is in line 3
if (readbytes{'[_speed]') `- nil) then
In Lua the argument you pass for a function must have an opening and ending of ( and ) respectively. Therefore as you can note in line 3 the argument you have passed for readbytes has an opening of { which is the cause of the error. In order to resolve this replace { with (
Hi i am trying to execute a script to fill data into a database using Golang
func executeTestScript(){
cmd := exec.Command("/usr/local/mysql/bin/mysql", "-h127.0.0.1", "-P3333", "-uusr", "-pPassxxx", "-Ddtb_test", "< /Users/XXX/Documents/test/scripts/olds/SCRIPT_XXX.sql")
var out, stderr bytes.Buffer
cmd.Stdout = &out
cmd.Stderr = &stderr
err := cmd.Run()
if err != nil {
fmt.Println(fmt.Sprintf("Error executing query. Command Output: %+v\n: %+v, %v", out.String(), stderr.String(), err))
log.Fatalf("Error executing query. Command Output: %+v\n: %+v, %v", out.String(), stderr.String(), err)
}
}
The problem is that i am getting the error:
ERROR 1049 (42000): Unknown database '< /Users/XXX/Documents/test/scripts/olds/SCRIPT_XXX.sql'
i think the problem is the last param (the sql script path) that the exec thinks is the dbname
The following command in the terminal is working:
/usr/local/mysql/bin/mysql --host=127.0.0.1 --port=3333 --user=usr --password=Passxxx --database=dtb_test < /Users/XXX/Documents/roseula/scripts/olds/SCRIPT_XXX.sql
but i try to replicate in Go to automatize the execution of the script.
The script have drop tables, create tables, inserts, and PK with FK relationships its a very complete one so i cant execute line by line, because of that i decided to execute de mysql program to insert the data in the database.
Any suggestions?
+1 to answer from #MatteoRagni for showing how to do stdin redirection in Golang.
But here's a simple alternative that I use:
cmd := exec.Command("/usr/local/mysql/bin/mysql", "-h127.0.0.1", "-P3333",
"-uusr", "-pPassxxx", "-Ddtb_test",
"-e", "source /Users/XXX/Documents/test/scripts/olds/SCRIPT_XXX.sql")
You don't have to make the mysql client read the script using stdin redirection. Instead, you can make the mysql client execute a specific command, which is source <scriptname>.
P.S.: I also would not put the host, port, user, and password in your code. That means you have to recompile your program any time you change those connection parameters. Also it's not secure to use passwords in plaintext on the command-line. Instead, I'd put all the connection parameters into a defaults file and use mysql --defaults-file=FILENAME.
This is a little example that runs something like:
cat < test.txt
that is what I think you are missing in your code:
package main
import (
"fmt"
"os/exec"
"os"
)
func main() {
cmd := exec.Command("cat")
file, _ := os.Open("test.txt")
cmd.Stdin = file
out, _ := cmd.Output()
fmt.Printf("%s\n", out)
}
That prints in the console the content of test.txt, as read by cat. You will need to adapt it to your problem.
Something like:
func executeTestScript(){
cmd := exec.Command("/usr/local/mysql/bin/mysql", "-h127.0.0.1", "-P3333", "-uusr", "-pPassxxx", "-Ddtb_test")
dump, dump_err = os.Open("/Users/XXX/Documents/test/scripts/olds/SCRIPT_XXX.sql")
if dump_err != nil {
/* Handle the error if file not opened */
}
cmd.Stdin = dump
var out, stderr bytes.Buffer
cmd.Stdout = &out
cmd.Stderr = &stderr
err := cmd.Run()
if err != nil {
fmt.Println(fmt.Sprintf("Error executing query. Command Output: %+v\n: %+v, %v", out.String(), stderr.String(), err))
log.Fatalf("Error executing query. Command Output: %+v\n: %+v, %v", out.String(), stderr.String(), err)
}
}
if I'm not wrong...
I've been reading the NodeMCU documentation and several closed issues about the change of SDK that previouly allowed to send multiple data streams (acting like a queued net.socket:send).
It seems a huge debate grew here (#730) and there (#993) or even here (#999). However, I did not find any convincing example of a webserver code that would allow me to read multiple html files (e.g. head.html and body.html) to display a page. Here's the example from TerryE that I tried to adapt, but with no success:
srv=net.createServer(net.TCP)
srv:listen(80,function(conn)
conn:on ("receive", function(sck, req)
local response = {}
local f = file.open("head.html","r")
if f ~= nil then
response[#response+1] = file.read()
file.close()
end
local f = file.open("body.html","r")
if f ~= nil then
response[#response+1] = file.read()
file.close()
end
local function sender (sck)
if #response>0 then sck:send(table.remove(response,1))
else sck:close()
end
end
sck:on("sent", sender)
sender(sck)
end )
end )
When connecting to the ESP8266, nothing loads and I get no error from the lua terminal.
For your information, head.html contains:
<html>
<head>
</head>
And body.html contains:
<body>
<h1>Hello World</h1>
</body>
</html>
I am very new to NodeMCU, please be tolerant.
Here is my solution without using tables, saving some memory:
function Sendfile(sck, filename, sentCallback)
if not file.open(filename, "r") then
sck:close()
return
end
local function sendChunk()
local line = file.read(512)
if line then
sck:send(line, sendChunk)
else
file.close()
collectgarbage()
if sentCallback then
sentCallback()
else
sck:close()
end
end
end
sendChunk()
end
srv = net.createServer(net.TCP)
srv:listen(80, function(conn)
conn:on("receive", function(sck, req)
sck:send("HTTP/1.1 200 OK\r\n" ..
"Server: NodeMCU on ESP8266\r\n" ..
"Content-Type: text/html; charset=UTF-8\r\n\r\n",
function()
Sendfile(sck, "head.html", function() Sendfile(sck, "body.html") end)
end)
end)
end)
And this is for serving single files:
function Sendfile(client, filename)
if file.open(filename, "r") then
local function sendChunk()
local line = file.read(512)
if line then
client:send(line, sendChunk)
else
file.close()
client:close()
collectgarbage()
end
end
client:send("HTTP/1.1 200 OK\r\n" ..
"Server: NodeMCU on ESP8266\r\n" ..
"Content-Type: text/html; charset=UTF-8\r\n\r\n", sendChunk)
else
client:send("HTTP/1.0 404 Not Found\r\n\r\nPage not found")
client:close()
end
end
srv = net.createServer(net.TCP)
srv:listen(80, function(conn)
conn:on ("receive", function(client, request)
local path = string.match(request, "GET /(.+) HTTP")
if path == "" then path = "index.htm" end
Sendfile(client, path)
end)
end)
Thank you for the reply. I actually added the header you mentioned, I didn't know that was necessary and I also removed the sck argument in the sender function. My first code was actually working, I don't know what was wrong last time.
Anyway, it helped me understanding what was happening: the following code seems to concatenate the response array, since the event sent of the socket calls back the sender function (sck:on("sent", sender))
sck:send(table.remove(response,1))
In fact, table.remove(array, 1) returns the first item of the array, and removes this item of the array. Calling this line multiple times has the effect to read through it, item by item.
For the sake of simplicity, here is the code of a simple webserver able to serve multiple files:
header = "HTTP/1.0 200 OK\r\nServer: NodeMCU on ESP8266\r\nContent-Type: text/html\r\n\r\n"
srv=net.createServer(net.TCP)
srv:listen(80,function(conn)
conn:on ("receive", function(sck, req)
local response = {header}
tgtfile = string.sub(req,string.find(req,"GET /") +5,string.find(req,"HTTP/") -2 )
if tgtfile == "" then tgtfile = "index.htm" end
local f = file.open(tgtfile,"r")
if f ~= nil then
response[#response+1] = file.read()
file.close()
else
response[#response+1] = "<html>"
response[#response+1] = tgtfile.." not Found - 404 error."
response[#response+1] = "<a href='index.htm'>Home</a>"
end
collectgarbage()
f = nil
tgtfile = nil
local function sender ()
if #response>0 then sck:send(table.remove(response,1))
else sck:close()
end
end
sck:on("sent", sender)
sender()
end)
end)
This example was taken from this instructables and fixed to work with the new SDK (which do not allow multiple :send anymore). Please let me know if this code has some issues.
I don't know what is the size limit of the files though. Nevertheless, I manage to append more than 2Ko to the response variable and send it at once without any issue.
I try to capture lines with calculations in my text document
and execute them.
I use this in my function:
for i in range(startline,endline)
let calculation = getline(i)
...
let out = eval(calculation)
...
endfor
sometimes something goes wrong and I receive this message:
Error detected while processing function....
Line ...
E488: Trailing Characters
Line .. is the line-nr in my function.
I would like to know also which calculation it concerns (which line in my text doc):
If Error detected = echo calculation
How can I check if there is an error message and echo the variable "calculation"?
There are two ways to handle script errors inside a function:
The first is suppressing the error via :silent!. Two downsides: You have to manually check for success, and any normal output from the evaluated script is suppressed, too (unless you do contortions with :unsilent).
let v:errmsg = ''
silent! let out = eval(calculation)
if v:errmsg != ''
" error
endif
I would recommend the second way via try...catch, which avoids the issues with the output and having to explicitly check for an error:
try
let out = eval(calculation)
catch /^Vim\%((\a\+)\)\=:E/
" v:exception contains what is normally in v:errmsg, but with extra
" exception source info prepended, which we cut away.
let v:errmsg = printf("Line: %d\nCalculation: %s\nError: %s", i, calculation, substitute(v:exception, '^Vim\%((\a\+)\)\=:', '', ''))
echohl ErrorMsg
echomsg v:errmsg
echohl None
endtry