Check if Input is empty doesnt work Kotlin

Check if Input is empty doesnt work Kotlin

By : Amit M
Date : October 22 2020, 08:10 AM
This might help you First you check if the EditText is empty and then try to convert to Int:
code :
if(!Input.text.toString().trim().isEmpty()) {
    val num = Input.text.toString().toInt()
    var hilf = 1

    for (i in 1..num) {
        hilf *= i
    Output.text = hilf.toString()

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Why doesnt look ahead and look behind Regex work in Kotlin?

Why doesnt look ahead and look behind Regex work in Kotlin?

By : mstandley
Date : March 29 2020, 07:55 AM
seems to work fine In your Kotlin example you're not splitting by a Regex but by a String.
Try the following:
code :
println("one;two;th/;ree".split(Regex("(?<!/);")).size) // 3
Check if function is empty in Kotlin

Check if function is empty in Kotlin

By : MicaelGranberg
Date : March 29 2020, 07:55 AM
I hope this helps you . I have some callback that has a parameter defined like this: , Ideally you would have a default parameter that can be called i.e.:
code :
fun saneDefault(getMoreFunction: (() -> String) = { "" }): Boolean {
    val result = getMoreFunction()
    return result.isEmpty()
private val DEFAULT = { throw UnsupportedOperationException("this shouldn't be called") }

fun isDefaultPassed(getMoreFunction: (() -> String) = DEFAULT): Boolean {
    if(getMoreFunction == DEFAULT){
        return true
    return false
Check multiple input empty value wont work

Check multiple input empty value wont work

By : michael malave
Date : March 29 2020, 07:55 AM
this one helps. The jQuery val method takes the value of the first matched element only, so it wont work for the second input as it still returns the content of the first.
Solve this by adding :last to the selector:
code :
   $("body").on("click",".createnew", function(){
     if ($(".myinput:last").val().length !== 0) { 
       $(".inputs").append("<div class='input' id='surway_poll'><input type='text' class='myinput' id='hoho' placeholder='Write something!'></div>");
       if($('.input').length >= 4){
     } else {
       alert("You can not leave an input field blank!");
body {
   width: 100%;
   height: 100%;
   padding: 0px;
   margin: 0px;
   font-family: helvetica, arial, sans-serif;
   -moz-osx-font-smoothing: grayscale;
   -webkit-font-smoothing: antialiased;
.container {
   margin:0px auto;
.inputs {
.input {


.error {
   border:1px solid red !important;
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="container">
   <div class="inputs">
      <div class="input" id="surway_poll">
         <input type="text" class="myinput" id="hoho" placeholder="Write something!">
   <div class="createnew">Create New Input</div>
     if ($('.myinput').get().every(s => $(s).val() !== '')) { 
How to check if a sequence is empty in Kotlin

How to check if a sequence is empty in Kotlin

By : user3327396
Date : March 29 2020, 07:55 AM
may help you . If you mean literally a Sequence, use none() without arguments for "is empty" and any() for "is not empty".
For other collections, these method names work as well, but there's also isNotEmpty(). Strangely, there is isEmpty, but only for arrays!
Why doesnt doesnt HTML input of type file not work with Ajax update panel

Why doesnt doesnt HTML input of type file not work with Ajax update panel

By : hunter986
Date : March 29 2020, 07:55 AM
this one helps. Check this out File upload and update panel
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