JavaScript阵列findIndex()方法JavaScript的阵列参考 例 获得具有18个或更多的值的数组中的第一个元素的索引: var ages = [3, 10, 18, 20];function checkAdult(age) { return age >= 18;}function myFunction() { document.getElementById("demo").innerHTML = ages.findIndex(checkAdult);...
1) Using index() MethodThe index() method is used to find the index value of the specific element.Syntax:list_name.index(item) It will print the index value of an item from the list_name.Example 1:# list list = ["Gwalior", "Bhopal", "Indore", "Noida", "Delhi", "Ajmer"] #...
Here,startandendare optional.xis the element that we need to find in the list. Let’s see the example below. consonants=["b","f","g","h","j","k"]i=consonants.index("g")print("The index of g is:",i) Output: The index of g is: 2 ...
Return Value: Returns the array element index if any of the elements in the array pass the test, otherwise it returns undefined JavaScript Version: ECMAScript 6More ExamplesExample Get the index of the first element in the array that has a value above a specific number: Minimum age: Try ...
Finding the index of an item in a list: In this tutorial, we will learn how to find the index of a given item in a Python list. Learn with the help of examples. By Sapna Deraje Radhakrishna Last updated : June 26, 2023 Given a Python list and an item, we have to find the ...
element:当前元素。 index(可选):当前元素的索引。 array(可选):调用find的数组。 thisArg(可选):执行回调时用作this的对象。 示例代码 代码语言:txt 复制 const users = [ { id: 1, name: 'Alice' }, { id: 2, name: 'Bob' }, { id: 3, name: 'Charlie' } ]; // 查找id为2的用户 const...
To find the index of an element in an int array in Java, you can use the indexOf() method of the Arrays class.
C# List FindIndexThe FindIndex method returns the zero-based index of the first element that matches the predicate. If no element is found, it returns -1. public int FindIndex(Predicate match); public int FindIndex(int startIndex, Predicate match); public int FindIndex(int startIndex, int...
Use themax()andoperator.itemgetter()Functions to Find the Index of the Maximum Element in a List in Python Theitemgetter()function from theoperatormodule returns a callable object which can be utilized to get an element from its operand (the operand being iterable). ...
(element) => element % 2 === 0用于判断元素是否为偶数,如果是,则返回该元素。 array.find()方法还有其他用法,例如可以使用箭头函数以外的函数作为回调函数,也可以指定回调函数的this值。此外,还可以通过第二个参数指定回调函数中的this值。 array.find()方法的优势在于它可以快速找到满足条件的第一个元素,并且...