Lodash _.partition() Method
Last Updated :
18 Oct, 2023
Lodash _.partition() method creates an array of elements split into two groups, the first of which contains elements predicate returns true and the second of which contains elements predicate returns false.
Syntax:
_.partition(collection, predicate);
Parameters:
- collection (Array|Object) parameter holds the collection to iterate over.
- predicate (Function) parameter holds the function invoked per iteration and is invoked with one argument (value).
Return Value:
This method returns the array of grouped elements.
Example 1: In this example, we are partitioning our array into two parts one which has true as an active value and another is false as an active value.
javascript
const _ = require( "lodash" );
let users = [
{ 'customer' : 'john' , 'age' : 26, 'active' : false },
{ 'customer' : 'jonny' , 'age' : 34, 'active' : true },
{ 'customer' : 'johnson' , 'age' : 12, 'active' : false }
];
let gfg = _.partition(users,
function (o) { return o.active; });
console.log(gfg);
|
Output:
[
[ { customer: 'jonny', age: 34, active: true } ],
[
{ customer: 'john', age: 26, active: false },
{ customer: 'johnson', age: 12, active: false }
]
]
Example 2: In this example, we are partitioning our array into two parts. we are passing our condition as an object into the _.partitiion() method.
javascript
const _ = require( "lodash" );
let users = [
{ 'customer' : 'john' , 'age' : 26, 'active' : false },
{ 'customer' : 'jonny' , 'age' : 34, 'active' : true },
{ 'customer' : 'johnson' , 'age' : 12, 'active' : false }
];
let gfg = _.partition(users, {
'age' : 12, 'active' : false
});
console.log(gfg);
|
Output:
[
[ { customer: 'johnson', age: 12, active: false } ],
[
{ customer: 'john', age: 26, active: false },
{ customer: 'jonny', age: 34, active: true }
]
]
Example 3: In this example, we are partitioning our array into two parts. we are passing our condition as an array into the _.partitiion() method.
javascript
const _ = require( "lodash" );
let users = [
{ 'customer' : 'john' , 'age' : 26, 'active' : false },
{ 'customer' : 'jonny' , 'age' : 34, 'active' : true },
{ 'customer' : 'johnson' , 'age' : 12, 'active' : false }
];
let gfg = _.partition(users, [ 'active' , false ]);
console.log(gfg);
|
Output:
[
[
{ customer: 'john', age: 26, active: false },
{ customer: 'johnson', age: 12, active: false }
],
[ { customer: 'jonny', age: 34, active: true } ]
]
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