I have an array of objects: I want to convert val1 to percentages based on the date and device. So on 2018-01-01 if the device is iphone I want the vals to be for example: val1 to be 10%, 23% & 67% respectively. My code so far: While I am able to group the data by 2 keys, I am
Tag: arrays
Filter array of objects with available or not filters
Suppose I have this dataset: and I want to filter it by some values, for example by animal and by year. Very easy I can do: same here: My problem is that sometimes animal or year can be null. In that case I want not to filter by that value. For example these are what I would like to obtain:
Issues With Filtering and Re-Displaying Data ReactJS
I’m trying to filter through the RandomUser api to display either males or females. My current issue is that I can’t display the filtered data like I did the original data. Here’s my current code: I think my issue applies to how I originally setup my html with my if/else statement leading to…
javascript add up date and time object in an array
so I have a list of array of time and date I want to join both appointmateDate and appointmentTime to iso format and get a new array of timeRange is that possible🙏🏻 Answer Using setHours. Loop over the array using Array#map and create a new Date object using appointmentDate and then using setHours and appoint…
What is a better approach to searching a large array for a particular entry multiple times on the same page?
I want to display many icons on the same page but I understand looping through the same array many times each render is too much work and it will reduce performance especially in slower devices. How do you approach this problem? The allIconsSet array is stored and exported in a file and bundled in the app. Th…
Ignore $in if empty array is provided
I have the following model: Note: interface matches the model exactly but i pasted this as its much shorter. I am using the following data to filter through this collection: What i want to achieve is to find every document and check if the corresponding array has at least one of the values from the array i se…
javascript filter elements not found in second array
solved: requires explicit return statement for each filter. I thought the single boolean in each filter would be clear enough. by @adiga I want to find the elements in one array (dcm) that are not found in a second array (vari). I want to match only two elements, vp (string type) and vd (date type). I’v…
Vue JS – How to change the position of a component that is displayed on mouse hover
I have one problem related to the location of the component. I have four pictures, when you hover over them, a certain component is displayed, it looks like this If, for example, hover the mouse cursor over a yellow picture, then another component will be displayed below, and so on with all components My prob…
Array.from() not converting nodeList into an array
I’ve created a nodeList of list elements using createElement(). Then I’ve used Array.from() to convert the nodeList in question into array I can iterate over. I want to apply a different width according to the value of the index. If index is even width of 300px else width of 500px. However, the co…
Returning array values, not the array iterator in Javascript
How can I return the values of an array? The methods .values() and .entries() seem to return an Array Iterator. This is not what I want. I am also not allowed to modify func1() function for this edge case. Thanks! Answer As Bergi stated, func1() will always return an array, no matter what func2() returns. But…