Convert double or int to a string in C#
The easiest way is to use String.Format() with the format specifier: double a = 0.000006; string formatted = String.Format(“{0:F6}”, a);
How to convert list into a string in C#
1. Creating a list: var list1 = new List(); 2. Adding values to the list: foreach (int value in Enumerable.Range(1, 10)) { var item = value + 100; list1.Add(item); } 3. Converting list into a string: string msg = string.Join(“,”, ohlc.ToArray());
Can’t close TCP/UDP socket connection in Windows 10 command prompt
Hey guys, just open another Command Prompt window as Admin and type this comand (Change 12345 with your port, of course) netstat -ano | findstr :12345 If netstat doesn’t work, try starting your command prompt or git bash as Administrator (right click, run as Admin). Figure out the PID of the process, in our case … Read more
Why Linux is Better than Windows for Web Hosting?
1. Linux is more stable and secure than Windows If you’re a Windows user thinking about switching to Linux, you may be worried about security issues. However, the Linux operating system is actually more stable and secure than Windows. In fact, the National Institute of Standards and Technology (NIST) conducted a study on the security … Read more
Easy way to reshape 1D numpy arrays into 2D
X = X.reshape(X.shape[0],-1)
Windows Server 2019 Datacenter Virtual Machine Activation Guide
Install Windows Server from the DVD or from .iso file downloaded from here Start Power Shell as administrator. Right click on Start (Windows) button in the bottom-left corner, then click “Windows PowerShell (Admin) In PowerShell type with your Activation key: slmgr.vbs /ipk *****-*****-*****-*****-***** Press Enter and restart computer Now you are ready to install HyperV … Read more
TypeError: ‘int’ object is not iterable
For all noobs like me. If you get this error, you most probably doing one stupid thing like I did: where y2.shape[0] is just an integer. Remember, we can iterate only through lists or other sequences. When we would like to repeat a certain action X number of times we should do the following: If … Read more
Merge 2 pandas dataframes while keeping the whole spectrum of values
Adding ‘how=’outer’ to ‘pd.merge()’ will actually do the job! Here’s a very good comprehensive article about Panda’s Join, Merge and Concatenate. And by the way, if you would like to fill NA values when merging, just add ‘.fillna(‘0′)’, in this case it will fill NA values with zeroes.
pandas.to_datetime() sometimes swaps days and months. Simple solution
Results in beautiful Instead of Who’d want to format date like this… 😕
Split categorical column into multiple columns with values from another column
Turns out it’s quite simple if you know the right pandas methods. There’s a simple way to split categorical column into multiple columns with panda’s get_dummies. That is one separate column for each category. Yes, all done automatically. Now we have a bunch of columns with category name in the column names and 0’s and … Read more