undefined Questions
4
Solved
Is there a succinct operation in JavaScript (ES2015) that does this:
x => x === undefined ? 0 : x
I keep running into situations where I want to increment x, but it's initially undefined, so ...
Anelace asked 4/1, 2017 at 2:57
7
I have a file which connects to Contentful using my specific space and accessToken. Recently, I decided to hide the keys into an .env file using the dotenv package. This is what my file looks like ...
Littleton asked 2/1, 2021 at 3:46
6
Solved
Alright this is what my code looks like
index.php
require_once($WebsiteRoot . "/include/testfile.php");
TestFunction();
/include/testfile.php
function TestFunction()
{
echo "It Works";
}
A...
23
I am building a react app and i need to fetch data from my api, now i want to store the api url as an environment variable. I have my .env file, i have dotenv installed, here is my code process.env...
4
Solved
rails guide example, click the button save post, console show this message:
Started POST "/posts" for 127001 at 2013-12-25 22:42:04 +0800
Processing by PostsController#create as HTML Parameters...
Bohannon asked 25/12, 2013 at 15:14
7
this problem appears only in joomla -
im trying to use the contentflow plugin with my joomla site
this is the plugin site - http://www.jacksasylum.eu/ContentFlow/
this is my site - http://2-dwe...
15
I am coding a website with Next.js and I tried to add google Tag Manager.
I followed the tutorial on the Next.js Github example but for some reasons I can't access to my environment variables.
It ...
Coccus asked 10/2, 2021 at 12:57
20
Solved
How do I verify the existence of an object in JavaScript?
The following works:
if (!null)
alert("GOT HERE");
But this throws an Error:
if (!maybeObject)
alert("GOT HERE");
The Error:
m...
Tricotine asked 15/11, 2010 at 17:4
22
Solved
I've been writing JavaScript for quite a long time now, and I have never had a reason to use null. It seems that undefined is always preferable and serves the same purpose programmatically. What ar...
Kingsley asked 7/7, 2011 at 1:1
12
Solved
Possible Duplicate:
Detecting an undefined object property in JavaScript
javascript undefined compare
How we can add a check for an undefined variable, like:
function A(val) {
if (val ==...
Cold asked 18/5, 2012 at 13:16
16
Solved
I wanted to check whether the variable is defined or not. For example, the following throws a not-defined error
alert( x );
How can I catch this error?
Magistrate asked 13/5, 2009 at 14:9
16
Solved
I've written a couple of functions that effectively replicate JSON.stringify(), converting a range of values into stringified versions. When I port my code over to JSBin and run it on some sample v...
Appledorf asked 18/4, 2015 at 18:29
8
Solved
I have this code:
<input type="hidden" id="editorTitle" name="title" value="home">
<textarea name="text" id="editorText"></textarea>
But when i write $('#editorTitle').val() an...
Kado asked 15/2, 2011 at 16:1
13
Solved
I have a global variable in JavaScript (actually a window property, but I don't think it matters) which was already populated by a previous script, but I don't want another script that will run lat...
Tribble asked 20/10, 2009 at 19:23
3
Solved
I am getting a really odd error from GCC 4.8.1 with inline functions.
I have two near-identical inline functions defined in header files (debug.h and error.h) in src/include/, with the only differ...
Gotha asked 28/9, 2013 at 15:47
8
Solved
I am working on creating different meal menus in this restaurant I have created using JavaScript. I was on my first couple lines of added code when I came across this ReferenceError saying that pro...
Com asked 1/2, 2019 at 19:50
5
I am a unskilled programmer and new to linux, I run into a problem when complining. I have two files 'ex_addinst.c' and 'lindo.h' in the same folder, I input command :
g++ -c ex_addinst.c
then, ...
29
Solved
We are frequently using the following code pattern in our JavaScript code
if (typeof(some_variable) != 'undefined' && some_variable != null)
{
// Do something with some_variable
}
Is th...
Beltran asked 1/4, 2010 at 9:17
4
Solved
I've run into an Undefined Variable Error writing SCSS.
My file structure is sound (I believe), because it compiles the rest of the files as it should into main.scss.
I'm using @use instead of @im...
Paleface asked 24/11, 2020 at 4:49
14
Solved
I'm trying to write a basic go program that calls a function on a different file, but a part of the same package. However, it returns:
undefined: NewEmployee
Here is the source code:
main.go:
...
4
What does this line below do?
undefined = 'A value';
If it does not change the value of undefined then what happens behind the scenes?
Philipp asked 9/4, 2016 at 16:55
8
Solved
I am wanting to write a function that converts all instances of a property of any object that is null to undefined. Many of my objects have nested objects as properties or arrays of values/objects....
Wheelock asked 16/5, 2018 at 15:32
34
Solved
How do I determine if a variable is undefined or null?
My code is as follows:
var EmpName = $("div#esd-names div#name").attr('class');
if(EmpName == 'undefined'){
// DO SOMETHING
};
<...
Baneful asked 15/4, 2010 at 18:12
9
Solved
How do I check a variable if it's null or undefined and what is the difference between the null and undefined?
What is the difference between == and === (it's hard to search Google for "===" )?
Longinus asked 24/2, 2011 at 8:10
1
I've implemented a web client based on the spring-boot-starter-webflux artifact.
The code:
// create client bean to use throughout services
@Bean
public WebClient geoserverWebClient() {
// to not ...
Chengteh asked 17/5, 2023 at 14:51
1 Next >
© 2022 - 2024 — McMap. All rights reserved.