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@ucast/mongo2js

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@ucast/mongo2js

git@github.com:stalniy/ucast.git

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What is @ucast/mongo2js?

@ucast/mongo2js is a utility library that converts MongoDB query objects into JavaScript functions. This can be particularly useful for filtering data in JavaScript applications using the same query syntax as MongoDB.

What are @ucast/mongo2js's main functionalities?

Convert MongoDB Query to JavaScript Function

This feature allows you to convert a MongoDB query object into a JavaScript function that can be used to filter arrays of objects. In this example, the query filters out objects where the age is greater than 18.

const { compile } = require('@ucast/mongo2js');

const query = { age: { $gt: 18 } };
const filterFunction = compile(query);

const data = [
  { name: 'Alice', age: 17 },
  { name: 'Bob', age: 20 },
  { name: 'Charlie', age: 22 }
];

const filteredData = data.filter(filterFunction);
console.log(filteredData); // Output: [{ name: 'Bob', age: 20 }, { name: 'Charlie', age: 22 }]

Support for Complex Queries

This feature supports complex MongoDB queries, including logical operators like $and. In this example, the query filters out objects where the age is greater than 18 and the name contains the letter 'B'.

const { compile } = require('@ucast/mongo2js');

const query = { $and: [ { age: { $gt: 18 } }, { name: { $regex: 'B' } } ] };
const filterFunction = compile(query);

const data = [
  { name: 'Alice', age: 17 },
  { name: 'Bob', age: 20 },
  { name: 'Charlie', age: 22 }
];

const filteredData = data.filter(filterFunction);
console.log(filteredData); // Output: [{ name: 'Bob', age: 20 }]

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Package last updated on 15 Feb 2023

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