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Abagail Waters

Questions by Abagail Waters

How to fix IndexError: invalid index to scalar variable?

This code generates error: IndexError: invalid index to scalar variable. at the line: results.append(RMSPE(np.exp...

C programming in Visual Studio?

Can I use Visual Studio to learn C programming? In the new project menu I can choose between Visual Basic, Visual C#...

How does str(list) work??

Why does str(list) returns how we see list on the console? How does str(list) work? (any reference to the CPython co...

What's the difference between an object and a struct in OOP??

What distinguishes and object from a struct? When and why do we use an object as opposed to a struct? How does an a...

ruby pipe operator?

I'm new to ruby, and I saw this code snippet 1|2 and it returns 3 What does the | operator actually do? I couldn...

Jumping to lines in Java?

I have just now started learning Java and one of the differences I noticed from C++ and VB is that Java has no goto ...

Linux: 'Username' is not in the sudoers file. This incident will be reported?

After logging into ssh, I got this message: 'Username' is not in the sudoers file. This incident will be reporte...

How can I print multiple character with one printf??

I want to print multiple character using printf. My approach up to now is this- #include <stdio.h> int main...

Algorithm for connecting points in a graph with curved lines?

I need to develop an algorithm that connects points in a non-linear way, that is, with smooth curves, as in the imag...

how perform grep operation on all files in a directory?

Working with xenserver, and I want to perform a command on each file that is in a directory, grepping some stuff out...

Which is the most gentle way to end a ssh session?

So far, I already know there are many ways to end a ssh session and disconnect from remote server. Assume under the ...

What's the actual use of 'fail' in JUnit test case??

What's the actual use of 'fail' in JUnit test case? ...

stop service in android?

Here I tried simple service program. Start service works fine and generates Toast but stop service does not. The cod...

MIPS program jr $ra instructions and stack handling?

I am new to MIPS programming and have been struggling to understand MIPS program and how does it flow. Can anyone pl...