im trying to save captured image ( encoding data) into database from canvas , but it only saves a blank image ? here is my code and here is my views.py with models.py my views.py i much appreciate your helps , please if you know something about it let me know , thank you so much Answer You need to
Category: Questions
When should I use try catch instead of then catch?
The question is simple, but I haven’t found the answer anywhere. When should i use try catch? in the code below I use try catch to handle the return of a request: Would it be a good practice to use then(…).catch(…)? Answer The difference is in how you’re handing Promises. If you’…
Efficient way to find value from an object with over 10,000 key/value pairs
I have a big object with over 10,000 key-value pairs. I want to find the value of a specific pair so I do this: Is this efficient? Is there a better way to do this? is it OK to have an object with < 10,000 entries? Answer Javascript objects are implemented as hashmaps, so the complexity of retrieving a val…
How can I divide this Object.values with the total?
I have this where car is 2 and total is 12. So I wanted to get the percentage of this but this is in an Object.values(res) I wanted the dataset in the graph to be in a percentage value. Let’s say car is 2 and the total is 12. So it should be 16.66%. However, in my dataset right now,
How to do a join from 2 JSON by a common ID field in Javascript
I have two JSON files: JSON A has some company properties and the company_id, while JSON B has company names and company ids. JSON A example: JSONB example: Which is the most efficient way to do a join by the company_id values? I would like to have the JSON C (merged result) with the company names correctly a…
Cypress Best Practice – Store and compare two values
I want to store a value, then perform an action and assert that the value has not changed. I do have a code that works but I would like to have input if there is a more elegant solution. The basic idea is: Get the number or results displayed (‘counts’), store it in a .then() function Change the us…
Comparing two arrays of objects for matching properties then creating two new arrays
I have the following two arrays: I need to end up with a newArray containing only one object per Id, but if the ids in an object in the oldOrder array and newOrder array then I need to get the difference in the Qty positive or negative. So for example the above would create this new array: I would also
Adobe Acrobat insert text in a new doc.txt
I’m trying to save text to a new doc in adobe acrobat with javascirpt, but i can’t undestand how to do that. I created a new file in this way: How can i insert text in it? Answer Acrobat JavaScript does not have access to the base plane where text etc. is residing. What you can do is create a
Cookie set without a name
I’m trying to set a simple cookie but the name of the cookie is never set. I’m setting the cookie like this: The name of the cookie is not set, only content is set with the name + the value. The environment variable is defined properly since it’s displayed in the “content”. Why i…
What is the typeof of a QuerySnapshot?
With firebase, you can get documents in a collection like this: const collectionData = await collectionPath.get(); using collectionData, you can loop with: The above code makes collectionData behave like an array of documents. However, you can still treat it like an object by calling things like size? e.g col…