The findIndex() method returns the index of the element that satisfies a testing function or -1 if no element passed the test. ... <看更多>

An implementation of the ES6 method Array.prototype.findIndex as a standalone module and a ponyfill. Finds an item in an array matching a predicate function, ... ... <看更多>

findIndex takes function as an argument and return the first element which meets given condition. If you want to use findIndex() you need to ... ... <看更多>

findIndex () 方法將依據提供的測試函式，尋找陣列中符合的元素，並返回其index（索引）。 ... findIndex(item => item === `Ivy`) console.log(answer) // 1. ... <看更多>

You can use the findIndex() method on Arrays in Javascript to search through an array and find the index of an ... ... <看更多>