Show HN: JAQT – JavaScript Queries and Transformations • Hacker News Board

Show HN: JAQT – JavaScript Queries and Transformations

#1

Post by Poefke » Mon, Sep 16, 2024, 9:08 AM UTC

Hi all,

I've made a javascript library to simplify searching/sorting/filtering in arrays of objects. Its inspired by both GraphQL and SQL, but implemented using javascript Proxies. Instead of creating a new language, its all just javascript.

I've made it as part of an experimental database, which uses javascript as the query engine. The normal javascript map/reduce/sort functions are quite difficult to master for junior developers. JAQT is easier to explain, and can still be used in combination with any existing array functions.

Please let me know what you think of the API and its ease of use!

Show HN: JAQT – JavaScript Queries and Transformations
github.com

Re: Show HN: JAQT – JavaScript Queries and Transformations

#2

Post by jansommer » Mon, Sep 16, 2024, 12:14 PM UTC

Wouldn't the query for your example just be

data.filter(d => d.friends.includes("John")).map(d => ({name: d.name+" "+d.lastName}))

Maybe I'm missing the bigger picture, but that doesn't seem so bad

Re: Show HN: JAQT – JavaScript Queries and Transformations

#3

Post by ssahoo » Mon, Sep 16, 2024, 12:23 PM UTC

Looks like .net Linq. Many js projects use lodash and variants, how do you compare that?

Re: Show HN: JAQT – JavaScript Queries and Transformations

#4

Post by gryzzly » Mon, Sep 16, 2024, 12:25 PM UTC

can a query like that be observable? so updating the array/object would cause the results to update?

Re: Show HN: JAQT – JavaScript Queries and Transformations

#5

Post by waqasloper » Mon, Sep 16, 2024, 12:34 PM UTC

[flagged]

Re: Show HN: JAQT – JavaScript Queries and Transformations

#6

Post by meiraleal » Mon, Sep 16, 2024, 12:37 PM UTC

jansommer wrote: post #2

Wouldn't the query for your example just be data.filter(d => d.friends.includes("John")).map(d => ({name: d.name+" "+d.lastName})) Maybe I'm missing the bigger picture, but that doesn't seem so bad

I liked JAQT API but it is not really good to create a layer on top of already simple functional constructors.

Re: Show HN: JAQT – JavaScript Queries and Transformations

#7

Post by porker » Mon, Sep 16, 2024, 1:14 PM UTC

In a similar vein is https://pbeshai.github.io/tidy/ which I've used for 3+ years. It's a really nice lightweight transformer.

I've also used https://github.com/uwdata/arquero once (better performance for large datasets).

Re: Show HN: JAQT – JavaScript Queries and Transformations

#8

Post by af3d » Mon, Sep 16, 2024, 1:25 PM UTC

gryzzly wrote: post #4

can a query like that be observable? so updating the array/object would cause the results to update?

AFAICT this library generates "flat" JSON objects. Wouldn't be too hard to implement it such that references to Javascript objects are instead returned, where some sort of callback could be invoked whenever the actual object is modified. I do rather like this "query engine" approach, too. It's a much cleaner interface IMO and doesn't seem to incur too much overhead either....

Re: Show HN: JAQT – JavaScript Queries and Transformations

#9

Post by pdyc » Mon, Sep 16, 2024, 1:29 PM UTC

porker wrote: post #7

In a similar vein is https://pbeshai.github.io/tidy/ which I've used for 3+ years. It's a really nice lightweight transformer. I've also used https://github.com/uwdata/arquero once (better performance for large datasets).

any idea what does tidy uses internally? or is it iterating over entire array for every operation?

Re: Show HN: JAQT – JavaScript Queries and Transformations

#10

Post by iddan » Mon, Sep 16, 2024, 1:43 PM UTC

This is everything i wanted