June 2015 - Tech Tips & Tricks

How To Create A Class In LUA

June 30, 2015 by blogmeister·0 Comments

While LUA is not an object oriented programming language, you can mimick your code to act like one. The key here is with the setmetatable() function.

Here is a .lua file containing a simple class.

local Object = {}
local Object_mt = { __index = Object }
function Object:new()
    local obj = { 
        variable1 = nil,
        variable2 = 'sample',
        variable3 = false
    }
    return setmetatable(obj , Object_mt)
end

local Object = {}

local Object_mt = { __index = Object }

function Object:new()

local obj = {

variable1 = nil,

variable2 = 'sample',

variable3 = false

}

return setmetatable(obj , Object_mt)

end

That’s it! That is all there is to it. Save it as object.lua and now you can simply create a new instance of your class like this:

local Object = require('object')
local myobj = Object:new()
print('the value of variable2 is ' .. myobj.variable2)

local Object = require('object')

local myobj = Object:new()

print('the value of variable2 is ' .. myobj.variable2)

How To Convert Float To Int In LUA

June 25, 2015 by blogmeister·0 Comments

There is no data type casting conversion feature available in LUA so an alternative to convert float values to integer would be to use the math library.

math.floor(variable)

1	math.floor(variable)

This returns the largest integer smaller than or equal to the value.

How To Integrate NLog In Visual Studio

June 24, 2015 by blogmeister·0 Comments

Integrating NLog in Visual Studio is pretty easy. And I mean literally. I have just re-started my learning experience with C# and Visual Studio and integrating NLog was one of the things I had to do to use in my Windows service.

To start off. Go to Tools > NuGet PackageManager -> Manage NuGet Packages for Solution

Now, on the upper right of the popup window, there should be a Search field there. Type NLog and search for it.

You should then be able to see a list of some NLog related packages. Select NLog and NLog Configuration.

Once installed, there should be a file named NLog.config. Open that to modify your preferred logging output to either File by default or through console.

The XML file should look like the following:

<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://www.nlog-project.org/schemas/NLog.xsd NLog.xsd"
      autoReload="true"
      throwExceptions="false"
      internalLogLevel="Off" internalLogFile="c:\temp\nlog-internal.log" >
  <variable name="myvar" value="myvalue"/>
  <targets>
    <target xsi:type="File" name="f" fileName="${basedir}/logs/${shortdate}.log"
            layout="${longdate} ${uppercase:${level}} ${message}" />
  </targets>
  <rules>
    <logger name="*" minlevel="Debug" writeTo="f" />    
  </rules>
</nlog>

<?xml version="1.0" encoding="utf-8" ?>

<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://www.nlog-project.org/schemas/NLog.xsd NLog.xsd"

autoReload="true"

throwExceptions="false"

internalLogLevel="Off" internalLogFile="c:\temp\nlog-internal.log" >

<target xsi:type="File" name="f" fileName="${basedir}/logs/${shortdate}.log"

layout="${longdate} ${uppercase:${level}} ${message}" />

</targets>

<rules>

</rules>

</nlog>

By default, the target and rules tags are commented out. Simply uncomment them. If you wish to have NLog output to console, change xsi:type from File to console.

That’s it!

Tech Tips & Tricks

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Month: June 2015

How To Create A Class In LUA

How To Convert Float To Int In LUA

How To Integrate NLog In Visual Studio