How can I get the latest documents by publication date? [closed] - javascript

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In mongodb, documents have a property like this: dateOfPublication: 2021-04-09T21:25:05.612+00:00.
How can I get, say, the first 3 posts by time?

You can achieve this with aggregation. You need two staged:
Sort your documents with $sort
Limit your results to let's say
3 with $limit
Example:
db.collection.aggregate([
{$sort: {'dateOfPublication': 1}},
{$limit: 3}
])

Related

How to turn object of arrays into array of objects [closed]

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How do I turn an object of arrays like this:
obj_of_arr = {apeCount : [1,2], owner:["0x8","0x0"]}
into an array of objects like this:
arr_of_obj = [{apeCount: 1, owner:"0x8"}, {apeCount: 2, owner: "0x0"}]
I'm using javascript with reactjs and nextjs stack

problem with trying to return an API not sure whats missing from my code but the console sells error in javascript line 15 [closed]

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The console tells me that in line 15 of my javascript there is an error but i am unsure of what it is. My button i created in html does not return my api facts and I am using a cord extension as well.
You need to separate each object property with a comma.

How to get this json data by using javascript? [closed]

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I am currently working on a telegram bot, and I want to add a function that can search Wikipedia, and I want to know how to get the 'extract' part without knowing the pageid from this wiki API that I fetch from URL?
For example this one: https://en.wikipedia.org/w/api.php?format=json&action=query&prop=extracts&exintro&explaintext&redirects=1&titles=wiki&utf8
Object.keys(data.query.pages).map(pageId => data.query.pages[pageId]).map(page=>page.extract)
where data is the json you got

Is there a way to query for a certain amount of documents from a database with graphql? [closed]

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Essentially what I want to do is to be able to query, lets say, fruits(0:30). This would give me the 29 documents in the collection regarding fruits. I understand how to query documents and such in graphql, but I do not understand how I would resolve this issue. I see many examples using TypeScript or the files are .graphql and I have no idea what is going on. Is there any possible solution in only node/javascript?
The GraphQL concept of slicing might be what you're looking for here.
From the learning page linked above:
{
hero {
name
friends(first:2) {
name
}
}
}

JSON.stringify options [closed]

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I'm returning an SQL query and using JSON.stringify to store the query in a JSON file.
Here is my code:
fs.writeFileSync('data/csv/file.json', JSON.stringify(results));
Which is giving me the following output when saved to file:
[{"":4.55},{"":114}]
I'm wanting to instead output the following:
[4.55, 114]
Is there a way to do this with JSON.stringify?
UPDATE
As per the answer from #cars10
The following did the trick:
JSON.stringify(results.map(a=>a['']))
Use
JSON.stringify(Object.values(results))
instead.
Edit: This is not yet the correct solution since it only works for input like {"":4.55, " ":114}.
Looking a bit closer at your example, you will have to do:
JSON.stringify(results.map(a=>a['']))
results=[{"":4.55},{"":114}] then turns into "[ 4.55, 114 ]".
results seems to be an array with a collection of objects inside. From each object you want the property "" placed into the output array.

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