I’m wanting to implement canvas as background for my website so users can use their cursors to paint on the webpage like this codepen: https://codepen.io/cocotx/pen/PoGRdxQ?editors=1010 (this is an example code from http://www.dgp.toronto.edu/~clwen/test/canvas-paint-tutorial/) The problem is that the c…
Tag: javascript
How do I transform the results of a Lodash groupBy in a _.chain
I have the following array: After running it through .groupBy in a _.chain, I get the following: How can I then transform it to the following? I suspect that .transform is correct, just can’t figure out how to make it work. Answer
updating state with new state in redux
i want to make a request to my php page to retrieve data until the page is loaded. i made this request with axios’ this request is successful “. i want to change state in store “the state tank is successful but the change is no”. I found an error: TypeError: Cannot read property ‘…
jest ReferenceError: Cannot access ” before initialization
I’m getting the error: ReferenceError: Cannot access ‘myMock’ before initialization Even though i respected jest documentation about the hoisting: A limitation with the factory parameter is that, since calls to jest.mock() are hoisted to the top of the file, it’s not possible to first …
How to access field on an array in cloud function?
I have this cloud function that creates a new document every time I have a new chat. I am trying to access the values on the messages array, but I got undefined on the console log. here is my document on firebase: I am trying to access the messages with lastMessage = data.messages to create a new document wit…
Mapping array with objects of open hours in react
So Im trying to render in jsx a list of 7 days with open hours, taking data from my json file. I want to make it looks somehow like this: Mon 09:00 – 21:00 Tue 09:00 – 21:00 Wed 09:00 – 21:00 Thu 09:00 – 21:00 Fri 09:00 – 21:00 Sat 11:00 – 21:00 Sun 11:00 – 21:00 In m…
how to reverse fetch images from nasa APOD api in react
** I fetched content from API with this code** and output of this code is like this and I want Button here with next and then that will show previous day images so can anyone tell me how to reverse that means after clicking on the next button by reversing the previous day images will show because NASA APOD(as…
problems with an array awaiting for a function that reads from firestore
I’m trying to build a method which reads from firestore an array of elements (object): I have a service which retrieves the data from firestore, first it gets an array of document references var data = snapshot.get(‘elements’); and then it gets all the objects: } Then in a component I have a…
I want to make a this count object but i dont know how to solve it
I expect it to be { ask: 1, a: 3, bunch: 3, try: 1, get: 1 }; but it is wrong in various cases – how can I fix it? Thank you for your interest. But there was a problem with the other conditions. its other condition , just updated.. Answer So the idea basically is check if the object
How to have Date selector for every button/option clicked in Vuejs
I am new to Vuejs, I have used 3 buttons which are chart1, chart2 and chart3 respectively. So whenever I click any of the button I want the Date selection to be displayed which is in a radio type. Shown Below: What I am trying to do is, I am trying to display the charts, whenever the button is clicked,