You have heard the mentioning of MQTT Message Queuing Telemetry Transport. What is it? Can I use? The MQTT is a protocol frequently used in the IoT Internet of Things space. It’s used for publish and subscribe mechanism. You would usually have either a Dumb Broker and Smart Client or Smart Broker and Dumb Client.
Category: Technology
Error 0x800f0954 Add or remove feature on the specified server failed
So, you trying to install .NET Framework 3.5 Feature on Server Manager with add roles and features on a Windows Server. I have seen this error on a Windows Server 2019 Datacenter. I need .NET Framework 2.0 and hence tried to install the .NET Framework 3.5 where both .NET 2.0 and 3.0 is included. The
What is Communicating Sequential Processes (CSP)
Communicating Sequential Processes is a processing paradigm. The concept of CSP were first introduced and described by Tony Hoare in 1978 in his paper Communicating Sequential Processes. The basic of it is a formal language to describe patterns of interactions in concurrent systems. The formal language in mathematics are defined typically as the alphabet or
Golang convert float to string
To convert a float to string in Go Golang you can use the string format function fmt.Sprintf Source: https://golang.org/pkg/strconv/
Can’t uninstall program in Windows 10
Trying to uninstall program from programs and features in control panel can get you an error. Either it can’t find the uninstaller or you don’t have sufficient access like admin rights even though you do have administrator access. So what you can try is using Microsoft own fix for installing or uninstall a program by
Converting Typescript const to function
In Typescript you can create functions in multiple ways either by using the function directly or having it bound to a const. We will first give an example of a const To convert this into a function change the first line. Your const name will be the function name, the argument will be added to
Getting started with R how to install a package
To install a package in R call the install function in the prompt like this Then when you have install swirl you can load in the library in your R file by using library() Now the library swirl has been loaded and you can now call the swirl functions Source: https://www.rdocumentation.org/packages/utils/versions/3.6.2/topics/install.packages
What does the =~ mean in bash
The character ~ is called tilde. And in relation to bash it’s used for regular expressions. The tilde ~ is part of the operator, so you need to use the equal and tilde like =~ If you e.g. have It will perform a regular expression match of your string, in this case txt matching you
How to plot a matrix in R
To plot a matrix in R you can convert it to an array. So you could use the rnorm() function Source: https://www.rdocumentation.org/packages/compositions/versions/2.0-1/topics/rnorm
How to add an extra row to data frame in R
Here is a quick example of how to add extra rows to a data frame in R. I’m using the colMeans() function to calculate a new value I want to add. First loading the data into a data frame with as.data.frame(). Then doing a simple for loop going from one to ten. Lastly adding the