在提示中复制文本 - Node.js

Question

I am working on a Node.js program that takes input and adds it to a list. I am going to use this program through terminal. I have written the following function.

Problem Areas:

add: function () {
            console.log("What do you want to add to the ToDo List?");
            // Starts the prompt
            prompt.start();
            // Gets input called content
            prompt.get(['content'], function(err, result) {
                content = result.content
                // Pushed content to the list
                toDo.list.push(content);
            });

It is called when this switch command exicutes.

switch (command){
                    case "list":
                        toDo.print();
                        break;
                    case "add":
                        toDo.add();
                        break;
                }

The issue is that all the input next duplicates while I input it.

Output:

All my Code (if you need it):

var prompt = require('prompt');

// Empty variables that we will use for prompt input
var content = "";
var command = "";
// Exits the program when this variable changes state
var done = false;

// Object that holds all functions and data for the ToDo portion of this program
var toDo = {
    // List that everything all ToDos will be stored within
    list: ["Example", "Example 2"],
    // Print function prints the list
    print: function () {
     console.log(toDo.list);
    },
    // The add function should add a value to the list
    add: function () {
        console.log("What do you want to add to the ToDo List?");
        // Starts the prompt
        prompt.start();
        // Gets input called content
        prompt.get(['content'], function(err, result) {
            content = result.content
            // Pushed content to the list
            toDo.list.push(content);
        });
    }
}


// Main loop
function getCommand() {
    // Starts the prompt
    prompt.start();
    // Ask for name until user inputs "done"
    prompt.get(['timeManage'], function(err, result) {
        command = result.timeManage;
        // Checks if it is equal to exit; if so it exits the program
        if (command === 'exit') {
            console.log('Thanks for using timeManage.');
        } else {
            // Checks the remaining commands; if it finds one it executes
            switch (command){
                case "list":
                    toDo.print();
                    break;
                case "add":
                    toDo.add();
                    break;
            }
        // Loops the prompt unless the word exit is run
        getCommand();
        }
    });
}
getCommand();

Ps: I am a Node.js noob so if you spot any mistakes please tell me.

Thanks, Base

Answer 1

var toDo = {
    // List that everything all ToDos will be stored within
    list: ["Example", "Example 2"],
    // Print function prints the list
    print: function () {
     console.log(toDo.list);
    },
    // The add function should add a value to the list
    add: function () {
        console.log("What do you want to add to the ToDo List?");
        // Starts the prompt
        prompt.start();
        // Gets input called content
        prompt.get(['content'], function(err, result) {
            content = result.content
            // Pushed content to the list
            toDo.list.push(content);
            getCommand();
        });
    }
}


function getCommand() {
    // Starts the prompt
    prompt.start();
    // Ask for name until user inputs "done"
    prompt.get(['timeManage'], function(err, result) {
        command = result.timeManage;
        // Checks if it is equal to exit; if so it exits the program
        if (command === 'exit') {
            console.log('Thanks for using timeManage.');
        } else {
            // Checks the remaining commands; if it finds one it executes
            switch (command){
                case "list":
                    toDo.print();
                    getCommand();
                    break;
                case "add":
                    toDo.add();
                    break;
            }
        }
    });
}

I basically removed the getCommand() you were calling after the end of the switch case and called it in, one inside the switch case where case "list" and the other inside the function toDo.add()

I guess when you called getCommand() like before, both prompts for content and timeManage where executed on the console and that maybe the reason why you get double letter when you type a single letter.

Here is an image to demonstrate what happened with your code. I have consoled the text "Add" after prompt.start() in toDo.add() and "getCommand" after prompt.start() in getCommand()