Hewbot's questions

I'm wondering if in C/C++ it is better to declare a new array on each round of loops:

while(true) {
  char array[255] = "";

  // Hacer algo con el array ...
}

Or empty it at each turn of it:

char array[255] = "";

while(true) {
  for(short i = 0; i < sizeof(array); i++) {
    array[i] = 0;
  }

  // Hacer algo con el array...
}

By best I mean both from a performance (speed) and best practices perspective.

I am trying to make a program in Node.js that, after receiving a Unix-like via command POST, executes it and displays the output in real time in the browser.

This is the code I am using to run the commands:

 exec(myCommand, function(err, stdout, stderr){
     sys.print('stdout: ' + stdout);
     sys.print('stderr: ' + stderr);
         if(err !== null) {
             console.log('EXECUTION ERROR: ' , err);
         }
 }

However, the output of stdoutcomes in the form of Buffer, so it's not clear to me how I can make the browser display its content as it increases.

My idea is that if, for example, I execute the command apt-get update, it will show what it is doing in real time, and not all the output at once when it has finished.

It occurred to me that I could save the contents of the buffer to a string repeatedly, and then have the browser, via JavaScript, check for updates frequently, but that seems like a bit of a hack to me, not to mention that It's not as fast as I would like.

In conclusion, how can I do this as quickly and simply as possible?

In C#, what is the difference between Stringand string? (see capitals)

Example:

string s = "¡Hola mundo!";
String S = "¡Hola mundo!";

What are the rules of use for each? And what are the differences?

Original question: What's the difference between String and string?