I have different dates like this: But the delimiter in the dates could be a dash – or a dot . or forward slash /. I have tried regex that works but I need to check if date is entered with non-matching delimiters like this DD-MM/YY then it should be invalid because the 1st delimiter is – and 2nd one
Tag: javascript
Why doesn’t \ display a newline in mathjax?
I am under the impression that you should use \ for newlines with mathjax, however I can’t get it to work. What am I doing wrong here? I expect to see 3 lines, but I get this: Other stackoverflow posts claim that \ should work, eg: https://math.meta.stackexchange.com/questions/11720/new-line-within-mathjax Answer You should use HTML to break lines as MathJax only handles math
React | JavaScript : Need to compare two objects
Objective: I need to check if the form has been edited by the user or not. If yes, then I will call the axios.put() function. Issue: Since in JS, obj1 = { name: “John “} !== obj2 = { name: “John” } I am looking for a better way to compare two objects. My way(seems inefficient) : I would really
Typescript map string literal types to uppercase
I would like to have a type b like So I tried But that does not do what I want it to do. Thank you for reading 🙂 Answer You can now do this with the introduction of Template Literal Types: TS Playground In addition to Uppercase<StringType>, there are also the following helper types: Lowercase Capitalize Uncapitalize They can be
Variable declared in data() is Undefined in Listener
I am declaring a “userid” variable in the data() section of my component. Within a mounted() method, I am initiating a listener for MetaMask. Upon changing account in MetaMask this listener is triggered. However, the “userid” (declared in data()) within the listener is undefined. How can I solve this problem? Answer Vue runs in strict mode. That means that this
Can I use function generator as event handler?
I have a list of HTMLCollection: And I have a script of JS: My goal is to write a keyboardEvent based on .addEventListener(“keydown”, generatorFunction) method whereby event handler would be presented as function generator i.e. generatorFunction presented above. Is it good or bad practice? Answer Using a generator function directly as an event callback wouldn’t make any sense because calling
Square Brackets for String in Javascript [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 2 years ago. Improve this question I do not understand why I need to add square brackets around the “account” variable below, for the “accounts” variable constitutes a string. Answer From
Get next cron job timing in node-cron
In node-cron, how do I get the timing of the next cron-job? e.g. cronJob.nextCronJob().time, or other properties. There are no methods in the documentation to show this. Answer I’m not aware of any way of getting this using the node-cron module. You can do this with the cron module however, using the cronJob.nextDates() function, like so: If you have to
My recaptcha render doesn’t work and return 0
I currently have a problem with Google’s Invisible Captcha. It refuses to load properly despite all my attempts. The situation: I have a form which is added to the DOM via jQuery when clicking on a button. The form is then displayed in an overlayer which covers the entire screen. At first, no worries but once the form is displayed,
How to seed models with polymorphic one to one relationship in mirage js?
this is just an example, I understand that you would normally have multiple comments, but for the sake of this example, lets assume that we have following models: and following factories: Now when trying to seed server with: It does seed it but when checking console.log(server.db.dump()); the commentable is null… commentableId: null. Why? EDIT: This is a tricky one. I