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Tag: reduce

How does one merge coordinate values of an array of geojson items?

Hello I am working with a large geojson dataset, and I am trying to see if I can merge the coordinate values of each entry based on entries that share the same “User_ID”. My dataset look like this: I have tried to merge the entries using the method shown in mwarren’s answer, url: “https://stackoverflow.com/questions/29244116/merge-geojson-based-on-unique-id”. Yet this comes with the small

Difference between two Objects – reduce

I’ve 2 Objects with data that is repeated but also varies. How to compare them and get the differences? I’ve to use .reduce. My work: but the output is without surname: “kowalski”. Expected output: Answer Please use this code

Loop asynchronosly through array

I have following code: As you can see this does not work. So the content of the for loop works pretty well. It goes through the array and works well, but the for loop itself is the problem. How can I get the for loop wait for the inner content to finish before going to the next key? The timeline

I want to replace this forEach function with the same but done using reduce. Can you say where I am doing wrong?

I create the columns and I have a checkbox which shows the columns name. When I click a checkbox square I get an array of checked names which are stored in checkedKeys. Now checkableColumns contains all the possible checkable values. Those elements which are in checkableColumns but not in checkedKeys are those columns that will disappear from the table’s columns.

Grouping and summing array objects

I’m having a data sample like this What I want to achieve with this data is to group it and sum it up so it comes out like this What the current code I have, I do not get the output as I want. Answer Try this

Why NaN’s reduce return?

I commented out the return sum, on purpose, because it does not work as expected. If I remove return sum, it returns the right average. But this is what I don’t understand: when it enters the if in the last index position, this return shows NaN. But why does it return NaN? Answer Let us assume the value of numeros

JS reduce: object accumulator titles

I am experimenting with the reduce function at the moment and wondering if I can tailor the accumulator’s keys’ name to be a specific value? For example, the below code returns {16 years of experience: … } but I would like the return results to be categorized like the below: Answer To group by years use the difference as keys

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