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Lodash - findLastIndex method
Syntax
_.findLastIndex(array, [predicate=_.identity], [fromIndex=array.length-1])
This method is like _.findIndex except that it iterates over elements of collection from right to left.
Arguments
array (Array) − The array to inspect.
[predicate=_.identity] (Function) − The function invoked per iteration.
[fromIndex=array.length-1] (number) − The index to search from.
Output
(number) − Returns the index of the found element, else -1.
Example
var _ = require('lodash'); var users = [ { user: 'Sam', active: false }, { user: 'Ted', active: true }, { user: 'Julie', active: false } ]; var result = _.findLastIndex(users, function(user) { return !user.active; }); console.log(result); result = _.findLastIndex(users, ['active', false]); console.log(result);
Save the above program in tester.js. Run the following command to execute this program.
Command
\>node tester.js
Output
0 0
lodash_array.htm
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