javascript-lodashHow do I use Lodash to group an array in JavaScript?
Lodash is a JavaScript library that provides utility functions for common programming tasks. It can be used to group an array in JavaScript with the _.groupBy() method.
Example
const array = [
{name: 'John', age: 20},
{name: 'Jane', age: 20},
{name: 'Bob', age: 21},
{name: 'Alice', age: 21}
];
const groupedArray = _.groupBy(array, 'age');
console.log(groupedArray);
Output example
{
20: [
{name: 'John', age: 20},
{name: 'Jane', age: 20}
],
21: [
{name: 'Bob', age: 21},
{name: 'Alice', age: 21}
]
}
The code above uses Lodash's .groupBy() method to group the array of objects by age. The .groupBy() method takes two arguments: an array of values and a key to group by. It returns an object with the keys being the grouped values and the values being an array of objects with that key.
Code explanation
const array = [...];
- declares an array of objects to be grouped.const groupedArray = _.groupBy(array, 'age');
- uses the _.groupBy() method to group the array by age.console.log(groupedArray);
- logs the grouped array to the console.
Helpful links
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- How can I use lodash in a JavaScript sandbox?
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