Lodash _.flatten() method is used to flatten the array to one level deep and it returns a new flattened array.
Syntax:
_.flatten( array );Parameter:
- array that holds a simple array or array of arrays.
Return Value:
- The return type of this function is an array.
Example 1: In this example, er are flattening the array to a single level by the use of the _.flatten() method.
// Requiring the lodash library
const _ = require("lodash");
// Original array
let array1 = [[1, 2], [4, 5], [7, 8]]
// Using _.flatten() method
let newArray = _.flatten(array1);
// Printing original Array
console.log("original Array1: ", array1)
// Printing the newArray
console.log("new Array: ", newArray)
Output:
Example 2: In this example, er are flattening the array of object to a single level by the use of the _.flatten() method.
// Requiring the lodash library
const _ = require("lodash");
// Original array
let array1 = [[{ "a": 1 }],
[{ "b": 2 }, { "c": 3 }]]
// Using _.flatten() method
let newArray = _.flatten(array1);
// Printing original Array
console.log("original Array1: ", array1)
// Printing the newArray
console.log("new Array: ", newArray)
Output:
Example 3: In this example, er are flattening the empty array to a single level by the use of the _.flatten() method.
// Requiring the lodash library
const _ = require("lodash");
// Original array
let array1 = [[], [[[]]], [[]], []]
// Using _.flatten() method
let newArray = _.flatten(array1);
// Printing original Array
console.log("original Array1: ", array1)
// Printing the newArray
console.log("new Array: ", newArray)
Output:
