Lodash _.update() Method
Last Updated :
20 Oct, 2023
Lodash _.update() method accepts an updater to produce the value to set. This method uses _.updateWith() function to customize path creation. It is almost the same as the _.set() function.
Syntax:
_.update(object, path, updater);
Parameters:
- object: This parameter holds the object to modify.
- path: This parameter holds the path of the property to set. It will be an array or string.
- updater: This is the function to produce the updated value.
Return Value:
This method returns the new object.
Example 1: In this example, we are updating the value of an object by using the _.update() method.
Javascript
const _ = require( "lodash" );
let obj = { cpp: [{ java: { python: 3 } }] };
_.update(obj, "cpp[0].java.python" , function (n) {
return n * n;
});
console.log(obj.cpp[0].java.python);
|
Output:
9
Example 2: In this example, we are updating the value of an object which is not present in that object and according the function which is passed in the _.update() method it is returning 0.
Javascript
const _ = require( "lodash" );
let obj = { 'cpp' : [{ 'java' : { 'python' : 3 } }] };
_.update(obj, 'html[0].css.javascript' ,
function (n) { return n ? n + 1 : 0; });
console.log(obj.html[0].css.javascript);
|
Output:
0
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