I tried assigning Math.PI to 1000000, but when trying to use the value, I still got the default non-overridden value, while I was able to override Math.floor with function(){console.log(‘floor’)} and calling it called the overridden function. I was wondering why that is and how I’d be able t…
Tag: javascript
Behavior of “Greater than” (and another inequality comparison operators) on arrays
I couldn’t find any description or any mention about how >, <, <= and >= operators behave while comparing two arrays in javascript. The only trivial thing I could think of is that the two arrays are compared by both elements for each relative indexes, but after testing it – I didn̵…
Extract ip and uag from Cloudflare cdn-cgi/trace text result using regex in JS
Hi I am planning to use Cloudflare cdn-cgi trace service to get clients IP and User Agent results. If I fetch this link: https://www.cloudflare.com/cdn-cgi/trace, the result I am getting is in a text format. Result text example: I did some research and figured out I need to use Regex? But not sure how to extr…
Angular – No provider for FormBuilder
I am using Angular 9. I am getting the following error: No provider for FormBuilder It has been reported in many cases, and the general solution appears to be to add the FormsModule to the app.module.ts file. e.g. I have tried this, but am still getting the error. Question Am I maybe doing something that̵…
Selecting element from DOM with Puppeteer and Node
I am using Node and Puppeteer to scrape some information from webpage I am having issues with selecting the right elements. This describes the exact situation. I want to select only the ‘Hello’ text which is always in the first child. The only difference is that there are like 50 pieces of DOM exa…
Difference b/w React Typescript , React JavaScript and React Native?
I have confusion about React JavaScript , React Typescript and React Native. I just have idea that we use React Native for mobile applications and and React (Javascript,Typescript) for web applications. Can someone exactly draw the difference between them ? Which parent library/framework those use ? Like Angu…
Does Mongoose auto cast types?
When I retrieve and modify a Lobby with this Schema it seems to automatically cast types. I could not find the documentation for that feature so I am wondering if I am mistaken something else for autocasting. I convert the types of password and owner to true or false because this is an exposed API endpoint ev…
What is the difference between import and cy.fixture in Cypress tests?
I’m learning cypress and I don’t understand what differs from import file from ‘../fixtures/filepath/file.json’ a fixture file and calling cy.fixture(file), and when should I use each one. Answer Basically when you say import file from ‘../fixtures/filepath/file.json’ you c…
How do I transpile TypeScript to JavaScript with Yarn?
How do I transpile TypeScript code in JavaScript in a project managed by Yarn? I need Javascript code in order to run it with other compilers (such as GraalVM) and investigate performance. Answer You can do it by adding a build rule to your package.json. Replace . with the path to your tsconfig.json file whic…
How to use javascript lookup table inside typescript map method?
How can I use a simple JavaScript lookup table (which is the mapping itself) inside map function? I.e how can i get rid of this “code” field (borrowed from here), and use only the lookup table inside map method? Answer It’s a little hard to know exactly what you’re looking for, but at …