What character can I use to display the “four arrows icon”??

What Unicode character can I use do display this character? I currently need it to write a .doc document, but I w...

Undefined method 'to_i' for :Symbol?

RoR novice here, appreciate any help. I have the following error: undefined method `to_i' for :funding_level:Symb...

What does the “+” symbol mean on the left side of the R console??

I have entered in code to plot a graph, but when I press Enter to execute the graph, it does not plot the graph. Rat...

Meaning of *& and **& in C++?

I found these symbols in a function declaration several times, but I don't know what they mean. Example: void racc...

Enums in Javascript with ES6?

I'm rebuilding an old Java project in Javascript, and realized that there's no good way to do enums in JS. The best...

How to count instances of character in SQL Column?

I have an sql column that is a string of 100 'Y' or 'N' characters. For example: YYNYNYYNNNYYNY... What is th...

Gnuplot: how to get better symbol alpha in pdf terminal?

Here is the test code: set terminal pdf enhanced; set output "test.pdf" plot 1 title "{/Symbol a} {/Symbol b} {/Sym...

Undefined Symbols for architecture x86_64: Compiling problems?

So I am trying to start an assignment, my professor gives us a Main.cpp, Main.h, Scanner.cpp, Scanner.h, and some ot...

in java what does the @ symbol mean??

I know what it means in a comment for documentation purposes, but outside of that what does it mean? (I would normal...

Can you explain what's symbols and debug symbols in c++ world??

Is it true that binary files like executables are composed of symbols and debug symbol is one kind of them? How to ...

How to merge two columns in R with a specific symbol??

I have a table read in R as follows: column1 column2 A B What is the command to be used to match two colum...