Javascript changing function trouble

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The code below is how it was originally

   function getRandomEmail() {
        const randomNumber = Math.floor(Math.random() * 200000)+1;
        return `User${randomNumber}@example.com`
    }

Instead of a random number generated and inserted I am trying to have an list of words added infront of the @example.com

like so

function getRandomEmail() {
var emailname = "testing testing2 testing3".split(" ");
return `User$(Math.floor(Math.random() * emailname.split)+ @example.com`

The output I'm getting now while running the script is

BAD_EMAIL: that email is invalid

did I miss anything ???


1 emailname is already an array after the split in the initialization. Now what you need is it's length

2 to insert the variable use ${..}, not $()

function getRandomEmail() {
  var emailname = "testing testing2 testing3".split(" ");
  return `User${Math.floor(Math.random() * emailname.length)}@example.com`
}

Functions, Did you know that a JavaScript function's named parameter variables are Strangely, all of the values in the result object are set to "green" . So the arguments object isn't a “real” array, so you run into problems when you� $(".some-element").initialize( function(){ $(this).css("color", "blue"); }); The difference from .each is - it takes your selector, in this case .some-element and wait for new elements with this selector in the future, if such element will be added, it will be initialized too. In our case initialize function just change element color to blue.


Here's a simple solution that uses randojs.com for readability.

function getRandomEmail(){
  return rando(["accounting", "sales", "hr"]).value + "@dundermifflin.com";
}

console.log(getRandomEmail());
<script src="https://randojs.com/1.0.0.js"></script>

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I think the following is good as far my knowledge goes. Is it correct ? Did I miss anything ?

edit: doesn't function as expected. the same 'word' from the array gets used multiple times and the array is never emptied.

function getRandomEmail() {
        var emailname = "test1 test2 test3".split(" ");
        const randomElement = emailname[Math.floor(Math.random() * emailname.length)];
        const index = emailname.indexOf(randomElement);
          if (index > -1){ emailname.splice(index, 1);}
          console.log(emailname);
          if (emailname && emailname.length > 0) {
       console.log('emailname is not empty.');
       return `${randomElement}@example.com`;
    }else{
       console.log('emailname is empty.');
    }
        return ("no mail available");
    }
    
     console.log(getRandomEmail());

Functions :: Eloquent JavaScript, But when a function is created using new Function , its [[Environment]] is set to reference not the current Lexical Environment, but the global one� In JavaScript, tasks involving date or time are handled using a Date object. It is a native object defined in ECMAScript, like Array or Function. which is mostly implemented in native code such as


emailname is an array of string "testing testing2 testing3". You don't need to again split.

Also, if you are using back-ticks (`) then you access variables/constant using ${variableName}, and NOT BY $(variableName)

function getRandomEmail() {
    var emailname = "testing testing2 testing3".split(" ");
    const randomElement = emailname[Math.floor(Math.random() * emailname.length)];
    return `User${randomElement}@example.com`;
}

console.log(getRandomEmail());

The "new Function" syntax, If we ever need to change the message or the way it is shown, it's enough to modify the code in one place: the function which outputs it. JavaScript Data Types. JavaScript variables can hold numbers like 100 and text values like "John Doe". In programming, text values are called text strings. JavaScript can handle many types of data, but for now, just think of numbers and strings. Strings are written inside double or single quotes. Numbers are written without quotes.


Functions, JavaScript Exercises, Practice, Solution: JavaScript is a cross-platform, object-oriented scripting language. Inside a host environment, JavaScript can be connected to the objects of its environment to provide programmatic control over them.


The JavaScript input text value property will produce a string, containing the value of the text field. Useful Code Examples for Practice If you are only starting to learn the get input .value JavaScript, we recommend that you start by practicing with the code examples we provide in this section.


Changing HTML Content. The easiest way to modify the content of an HTML element is by using the innerHTML property.. To change the content of an HTML element, use this syntax: