I've been facing a challenge with an exercise. In this exercise, the client will input a specific integer x, followed by x other y values separated by spaces. The output should be the sum of each y value, also separated by spaces.
For example:
Input: 4 | Input: 5
21 35 55 66 | 333 53 99 12 55
Output: 3 8 10 12 | Output: 9 8 18 3 10
and so forth...
While I have grasped the main concept, my struggle lies in understanding the process.stdin.on('data', function() ...) part of the code.
I couldn't find many helpful videos or explanations on this topic.
After watching two brief explanatory videos, here is what I attempted:
let number = null;
let numOrder = [];
function clientsnum() {
process.stdout.write("Enter number: ");
process.stdin.on("data", function (data) {
number = parseInt(data.toString().trim());
process.stdin.pause();
});
process.stdin.on("pause", function () {
console.log("Paused");
process.stdout.write(`${numOrder} ${number}` + "\n"); //for debugging
order();
});
}
function order() {
console.log("got here"); //for debugging
process.stdout.write("numberOrder: ");
process.stdin.resume();
process.stdin.on("data", function (data) {
if (numOrder.length < number) {
numOrder.push(parseInt(data.toString().trim()));
} else {
process.exit();
}
});
process.on('exit', function() {
console.log('Over')
})
}
clientsnum();
At times, I notice duplicates in the array and the value for "number" getting changed unexpectedly.
The exercise provides a template that I came across on other websites. While I understand the code, it doesn't seem to work as expected when I try using "process.stdin.on('end', ...)".
If anyone could provide some insights or explanations, I would highly appreciate it.
Below is the template provided:
function main(input) {
process.stdout.write("hello " + input) //write output
}
process.stdin.resume()
process.stdin.setEncoding("utf-8")
var stdin_input = ""
process.stdin.on("data", function(input) {
stdin_input += input //read input from stdin
})
process.stdin.on("end", function (){
main(stdin_input)
})