How to resolve “Server Error in ‘/’ Application” error?

You may get this error when trying to browse an ASP.NET application. The debug information shows that “This error can be caused by a virtual directory not being configured as an application in IIS.” However, this error occurs primarily out of two scenarios. When you create an new web application using Visual Studio .NET, it … Read more

Reading a plain text file in Java

ASCII is a TEXT file so you would use Readers for reading. Java also supports reading from a binary file using InputStreams. If the files being read are huge then you would want to use a BufferedReader on top of a FileReader to improve read performance. Go through this article on how to use a Reader I’d also recommend you download and read this wonderful … Read more

How do you create a dictionary in Java? [closed]

You’ll want a Map<String, String>. Classes that implement the Map interface include (but are not limited to): HashMap LinkedHashMap Hashtable Each is designed/optimized for certain situations (go to their respective docs for more info). HashMap is probably the most common; the go-to default. For example (using a HashMap): type of animal

git stash apply version

The keys into the stash are actually the stash@{n} items on the left. So try: (note that in some shells you need to quote “stash@{0}”, like zsh, fish and powershell). Since version 2.11, it’s pretty easy, you can use the N stack number instead of using stash@{n}. So now instead of using: You can type: To get list of … Read more

What does “Could not find or load main class” mean?

The java <class-name> command syntax First of all, you need to understand the correct way to launch a program using the java (or javaw) command. The normal syntax1 is this: where <option> is a command line option (starting with a “-” character), <class-name> is a fully qualified Java class name, and <arg> is an arbitrary command line argument that gets passed to your application. 1 – There … Read more

$ operator is invalid for atomic vectors for dataframe R

The problem is relatively simple. You have If we break this down you’ll see the problem: You create an empty data frame and assign it to the object team_seed You create a matrix by column-binding the vectors playoff_teams, seed_col, and BPI_col. You assign this matrix to the object team_seed, thus obliterating the empty data frame you created in the first line. R just overwrote … Read more

Categories R

How to solve npm error “npm ERR! code ELIFECYCLE”

Step 1: $ npm cache clean –force Step 2: Delete node_modules by $ rm -rf node_modules (rmdir /S /Q node_modules in windows) folder or delete it manually by going into the directory and right-click > delete / move to trash. If are not updating your packages you can delete the package-lock.json file too. Step 3: npm install To start again, $ npm start This worked for me. … Read more

What exactly does numpy.exp() do? [closed]

The exponential function is e^x where e is a mathematical constant called Euler’s number, approximately 2.718281. This value has a close mathematical relationship with pi and the slope of the curve e^x is equal to its value at every point. np.exp() calculates e^x for each value of x in your input array.