JavaScript JavaScript function returning “undefined” javascript function returning undefined,javascript function returning function,javascript function

I wrote a simple code to choose random name from four, using "random_word();" function and it doesn't work. It says:"undefined". Can anyone explain me why and help to fix it? Thanks for all help.

var randomWord;

var word = new Array(3);
word[0] = "Michael";
word[1] = "Simon";
word[2] = "Peter";
word[3] = "Mark";

function random_word(){
var randomWord = word[Math.floor(Math.random()*word.length)]
}

random_word();

document.write(randomWord);
Answer:1

You make randomWord to a private variable of the function with a var statement. Without, you could use the global variable for the result.

function random_word() {
    randomWord = word[Math.floor(Math.random() * word.length)];
}

var randomWord;
    word = ["Michael", "Simon", "Peter", "Mark"];

random_word();
document.write(randomWord);
Answer:2

The local variable randomWord in the random_word function context has nothing to do with the randomWord declared in the outer context. If you want to reset the value of the outer context randomWord variable then you should drop the var keyword in your function.

function random_word(){
    randomWord = word[Math.floor(Math.random()*word.length)]
}

But this is not a good way of programming. Ideally the function should return a value.

function random_word(){
  return word[Math.floor(Math.random()*word.length)];
}

var randomWord = random_word();
var anotherRandomWord = random_word();
Answer:3

I'm having some trouble with using Dropzone.js within a standard html form. With the code I have, everything is working as it should, I can click the area to add an image, I can only add one image at ...

I'm having some trouble with using Dropzone.js within a standard html form. With the code I have, everything is working as it should, I can click the area to add an image, I can only add one image at ...

  1. dropzone form submit
  2. dropzone submit form with files
  3. dropzone submit form without files
  4. dropzone submit form data
  5. dropzone js form submit
  6. dropzone processqueue on form submit
  7. dropzone upload on form submit
  8. dropzone upload file on form submit
  9. dropzone js upload on form submit

<div contenteditable="true"> abcde<img src="abc.jp" />fg </div> $('div').append('<img src="abc.jpg" />'); //this will append img at end of text I try to add an image into ...

<div contenteditable="true"> abcde<img src="abc.jp" />fg </div> $('div').append('<img src="abc.jpg" />'); //this will append img at end of text I try to add an image into ...

  1. jquery append string to string
  2. jquery append string as html
  3. jquery append string in loop
  4. jquery append string with comma
  5. jquery append string to input value
  6. jquery append string to url
  7. jquery append string to element
  8. jquery append string to href
  9. jquery append string to class name
  10. jquery append string to array
  11. jquery append string to id
  12. jquery append string not html
  13. jquery append string to textarea
  14. jquery append string to body
  15. jquery append string to textbox
  16. jquery append string before
  17. jquery append string to var
  18. jquery append string text
  19. jquery append string object
  20. jquery append string position

Hi I noticed a very interesting behavior in JavaScript RegEx.exec function. if I run the same regex multiple times on a string that returns positive, it will return positive only half of the time.. (...

Hi I noticed a very interesting behavior in JavaScript RegEx.exec function. if I run the same regex multiple times on a string that returns positive, it will return positive only half of the time.. (...

I'm trying to overwrite a specific value in my Redux state which is an array. I have gotten the index already and also the value of the new text. I'm just not sure about the best way of overwriting ...

I'm trying to overwrite a specific value in my Redux state which is an array. I have gotten the index already and also the value of the new text. I'm just not sure about the best way of overwriting ...

  1. replace value array javascript
  2. replace value array php
  3. replace value array python
  4. replace value array
  5. replace value array js
  6. replace value array java
  7. replace value array numpy
  8. replace value in arraylist
  9. replace array value in jquery
  10. replace array value by key php
  11. replace array value in c#
  12. replace array value with another javascript
  13. replace array value matlab
  14. replace array value swift
  15. replace array value powershell
  16. replace array value in typescript
  17. replace array value in angular 2
  18. replace array value in angularjs
  19. replace array value in sql
  20. replace array value laravel