javascript: stop certain loops and not others [enable/disable]-CodePudding

How could I enable/disable certain loop that contains user input

const prompt = require('prompt-sync')();
const readline = require('readline');

readline.emitKeypressEvents(process.stdin);
if (process.stdin.isTTY) process.stdin.setRawMode(true);

process.stdin.on("keypress", (str, key) => {
    if(key.name == "a") {{var fruit = prompt('input');}
function loop() {
console.log("test 123123 " fruit)}

time = setInterval(function(){loop()},6000)}})

test 123123 apple  (loop1/userinput1)
test 123123 orange (loop2/userinput2)

how could I stop just the orange loop and keep the other and also how could i stop duplicates so that the same input can't be looping at the same time.

ex...

someone enters something like "apple"
it would start printing
then they also enters "orange"
they decide I don't wanna loop "orange" anymore they enter "orange" again that turns off "orange" but keeps printing "apple"

CodePudding user response：

You need to put the variable "time" to outer scope, and use clearInterval for each new input:

const prompt = require('prompt-sync')();
const readline = require('readline');

readline.emitKeypressEvents(process.stdin);
if (process.stdin.isTTY) process.stdin.setRawMode(true);

const map = new Map();
process.stdin.on("keypress", (str, key) => {
    if (key.name == "a") {
        { var fruit = prompt('input'); }
        function loop() {
            console.log("test 123123 "   fruit)
        }
        const oldID = map.get(fruit);
        if (oldID) {
            clearInterval(oldID);
            map.delete(fruit);
        } else {
            const time = setInterval(loop, 100);
            map.set(fruit, time);
        }
    }
    // if (key.name == 'c') { // <== just my code to kill process
    //     process.exit();
    // }
})