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Lodash _.findIndex


lodash is a popular JavaScript utility library that provides a variety of helper functions to simplify programming tasks. One of the functions provided by lodash is called _.findIndex, which is used to search an array or object for a specified value and return the index of its first occurrence.

The _.findIndex method takes three parameters: the first parameter is an array or object to search, the second parameter is a predicate function that determines the condition for the search, and the third parameter is an optional value to bind to the predicate function as a context.

The predicate function is invoked for each element or property of the array or object until the first element or property that satisfies the condition is found. If such an element or property is found, the index of the element or property is returned. If the condition is not satisfied for any element or property, -1 is returned.

The _.findIndex method is a useful tool for searching for specific values in arrays or objects. It can be used to find the index of the first occurrence of a particular value or to search for an element that matches a specific condition. The use of _.findIndex in combination with other lodash functions can provide powerful programming solutions for many common tasks.