--- title: "Mariana Medeiros (@marianafmedeiros) | Hashnode" description: "Data Engineer | Product Engineer | Software Engineer. Read the latest articles by Mariana Medeiros on Hashnode." url: "https://hashnode.com/@marianafmedeiros" --- @marianafmedeiros # Mariana Medeiros @marianafmedeiros · Brazil · Joined March 2020 Data Engineer | Product Engineer | Software Engineer ### [This is What You Need to Know About Copies - Python](https://cafecotech.hashnode.dev/this-is-what-you-need-to-know-about-copies-python?utm_source=hashnode&utm_medium=feed) When solving one of the many problems in Hacker Rank (which I love to do when I have time) I tried to isolate an array input to preserve its original value and modify the copy as I wanted. The code was not even compiling and then I realized when modi... 3 min read · [cafecotech.hashnode.dev](https://cafecotech.hashnode.dev/this-is-what-you-need-to-know-about-copies-python?utm_source=hashnode&utm_medium=feed) [Jun 25, 2020](https://hashnode.com/posts/this-is-what-you-need-to-know-about-copies-python/5ef529cb6d43af6be6a4dfb5) ### [Random Variables](https://cafecotech.hashnode.dev/random-variables?utm_source=hashnode&utm_medium=feed) Random what? For me, randomness was about something that we could not predict that it was going to happen at all. And when I put it together with the concept of variable that I consider to be an element that can take any possible value under minimal ... [cafecotech.hashnode.dev](https://cafecotech.hashnode.dev/random-variables?utm_source=hashnode&utm_medium=feed) [May 16, 2020](https://hashnode.com/posts/random-variables/5ebfd727a4db0c222f2220b3) ### [Types of Data Analytics](https://cafecotech.hashnode.dev/types-of-data-analytics?utm_source=hashnode&utm_medium=feed) A Short Thought About Data At first, data is some unconnected information about anything that we can find anywhere as long as we are interested in what it can tell us. I promise it makes sense if you read it once more. For data to be found, it need... [cafecotech.hashnode.dev](https://cafecotech.hashnode.dev/types-of-data-analytics?utm_source=hashnode&utm_medium=feed) [1](https://hashnode.com/posts/types-of-data-analytics/5eb0c385352b69972eb68b78) [May 5, 2020](https://hashnode.com/posts/types-of-data-analytics/5eb0c385352b69972eb68b78) ### [WT\* GIT](https://cafecotech.hashnode.dev/wt-git?utm_source=hashnode&utm_medium=feed) How I met Git When first getting in touch with the software development world, I stumbled upon expressions such as "push to master", "merge this feature", "create a new branch", "commit this and that" ... and I was really lost. Like ... are you talki... [cafecotech.hashnode.dev](https://cafecotech.hashnode.dev/wt-git?utm_source=hashnode&utm_medium=feed) [2](https://hashnode.com/posts/wt-git/5ea9a111f068bba9527d9913) [Apr 29, 2020](https://hashnode.com/posts/wt-git/5ea9a111f068bba9527d9913) ### [Standardization | Normalization](https://cafecotech.hashnode.dev/standardization-or-normalization?utm_source=hashnode&utm_medium=feed) Preprocessing Data First things first! When we come across some dataset (raw data), it is recommended to follow these steps to understand and, if necessary, adjust your data for further analyses: Read Data Checking for missing values, categorical da... [cafecotech.hashnode.dev](https://cafecotech.hashnode.dev/standardization-or-normalization?utm_source=hashnode&utm_medium=feed) [Apr 20, 2020](https://hashnode.com/posts/standardization-or-normalization/5e9d066c4248eaef432287ad)