Unable to provide desired array return

Question

Unable to provide desired array return

Greetings from a newcomer to StackExchange! I recently delved into the world of programming and am currently learning JavaScript. My goal is to create an array of random numbers with 'n' size in order to experiment with sorting and searching algorithms to determine efficiency.

Despite my efforts, I seem to have hit a roadblock. I attempted this task yesterday but still cannot identify the root of the issue - my result is always an empty array.

My current setup involves using inquirer 0.12.0 for user input.

var inquirer = require('inquirer');

// GENERATE AN ARRAY WITH A SIZE OF n CONTAINING RANDOM NUMBERS
var value;
var limit;

var questionRandomSize = [{
  type: 'input',
  name: 'randomsize',
  message: 'Enter the maximum number for randomness.',
  validate: function (limit) {
    if (limit > 0) {
      return true;
    } else {
      return 'Please enter a number to proceed.'
    }
  }
}];

var questionArraySize = [{
  type: 'input',
  name: 'arraysize',
  message: 'Enter the size of the array.',
  validate: function (value) {
    if (value > 0) {
      return true;
    } else {
      return 'Please enter a number to proceed.';
    }
  }
}];

var nArray = new Array();

function generateArray(value) {
  for (i = 0; i < value; i++) {
    nArray.push(generateRandomNumber(limit));
  }
}

inquirer.prompt(questionRandomSize, function (limit) {
  function generateRandomNumber(limit) {
    return Math.floor(Math.random() * limit);
  }
  inquirer.prompt(questionArraySize, function (value) {
    generateArray(value);
    mainMenu();
  });
});

// MAIN MENU FUNCTION
function mainMenu() {
  if (nArray.length === value){
    console.log(nArray);
  } else {
    generateArray(value);
  }
}

Thank you in advance for your assistance!

javascript arrays

Answer 1

Answer №1

Your code contains various errors, but I have fixed them and provided a working version below:

var inquirer = require('inquirer');

var questionRandomSize = [{
    type: 'input',
    name: 'randomsize',
    message: 'Enter the maximum random number.',
    validate: function (limit) {
        if (limit > 0) {
            return true;
        } else {
            return 'Please enter a valid number to proceed.'
        }
    }
}];

var questionArraySize = [{
    type: 'input',
    name: 'arraysize',
    message: 'Enter the array size.',
    validate: function (value) {
        if (value > 0) {
            return true;
        } else {
            return 'Please enter a valid number to continue.';
        }
    }
}];

var nArray = [];

function createArray(limit, size) {
    for (var i = 0; i < size; i++) {
        nArray.push(generateRandomNumber(limit));
    }
}

function generateRandomNumber(limit) {
    return Math.floor(Math.random() * limit);
}

inquirer.prompt(questionRandomSize, function (limit) {
    inquirer.prompt(questionArraySize, function (size) {
        createArray(limit.randomsize, size.arraysize);
        displayMenu();
    });
});

//MENU
function displayMenu() {
    console.log('array', nArray);
}

Output example:

? Enter the maximum random number. 2
? Enter the array size. 4
array [ 0, 1, 0, 1 ]

The errors that were corrected include:

Misunderstanding the return value from prompt method as user input instead of an object with properties
Improper scope placement of the generateRandomNumber function
Unnecessary recursive call within createArray function

Additional notes:

Use [] when creating arrays instead of new Array()
Always declare variables using var, let, or const
Consider updating inquirer to the latest version for improved functionality with Promises

Answer 2

Your code contains various errors, but I have fixed them and provided a working version below:

var inquirer = require('inquirer');

var questionRandomSize = [{
    type: 'input',
    name: 'randomsize',
    message: 'Enter the maximum random number.',
    validate: function (limit) {
        if (limit > 0) {
            return true;
        } else {
            return 'Please enter a valid number to proceed.'
        }
    }
}];

var questionArraySize = [{
    type: 'input',
    name: 'arraysize',
    message: 'Enter the array size.',
    validate: function (value) {
        if (value > 0) {
            return true;
        } else {
            return 'Please enter a valid number to continue.';
        }
    }
}];

var nArray = [];

function createArray(limit, size) {
    for (var i = 0; i < size; i++) {
        nArray.push(generateRandomNumber(limit));
    }
}

function generateRandomNumber(limit) {
    return Math.floor(Math.random() * limit);
}

inquirer.prompt(questionRandomSize, function (limit) {
    inquirer.prompt(questionArraySize, function (size) {
        createArray(limit.randomsize, size.arraysize);
        displayMenu();
    });
});

//MENU
function displayMenu() {
    console.log('array', nArray);
}

Output example:

? Enter the maximum random number. 2
? Enter the array size. 4
array [ 0, 1, 0, 1 ]

The errors that were corrected include:

Misunderstanding the return value from prompt method as user input instead of an object with properties
Improper scope placement of the generateRandomNumber function
Unnecessary recursive call within createArray function

Additional notes:

Use [] when creating arrays instead of new Array()
Always declare variables using var, let, or const
Consider updating inquirer to the latest version for improved functionality with Promises

Answer 3

Answer №2

Welcome to CodeHelp! If you're looking to create an array of a specific size filled with random numbers within a set limit, you've come to the right place.

The issue at hand doesn't require the use of the inquirer library, so you can eliminate that unnecessary code from your query.

To solve this problem, consider crafting a concise function that generates the desired array for you.

function generateRandomArray(size, limit){

    // Initialize an empty array
    var new_array = [];

    // Perform the following operations 'size' number of times
    for(var i = 0; i < size; i++){

        // Generate a random number between 0 and 'limit'
        // Push it into the array.
        new_array.push(Math.floor(Math.random() * (limit + 1)));

    }

    // Return the final array
    return new_array;

}

This solution only spans across 4 lines. Simply call generateRandomArray(size, limit) to obtain an array of size size containing numbers ranging from 0 to limit:

var size  = 10;
var limit = 100;
var result_array = generateRandomArray(size, limit);

You can obtain values for size and limit through various means such as user input fields or utilizing JavaScript's prompt() method. Best of luck with your coding!

Answer 4

Welcome to CodeHelp! If you're looking to create an array of a specific size filled with random numbers within a set limit, you've come to the right place.

The issue at hand doesn't require the use of the inquirer library, so you can eliminate that unnecessary code from your query.

To solve this problem, consider crafting a concise function that generates the desired array for you.

function generateRandomArray(size, limit){

    // Initialize an empty array
    var new_array = [];

    // Perform the following operations 'size' number of times
    for(var i = 0; i < size; i++){

        // Generate a random number between 0 and 'limit'
        // Push it into the array.
        new_array.push(Math.floor(Math.random() * (limit + 1)));

    }

    // Return the final array
    return new_array;

}

This solution only spans across 4 lines. Simply call generateRandomArray(size, limit) to obtain an array of size size containing numbers ranging from 0 to limit:

var size  = 10;
var limit = 100;
var result_array = generateRandomArray(size, limit);

You can obtain values for size and limit through various means such as user input fields or utilizing JavaScript's prompt() method. Best of luck with your coding!

Unable to provide desired array return

Answer №1

Answer №2

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