importjava.util.OptionalInt;importjava.util.stream.IntStream;publicclassStreamArrayIndexFinder{publicstaticOptionalIntfindIndex(int[]array,inttarget){returnIntStream.range(0,array.length).filter(i->array[i]==target).findFirst();}publicstaticvoidmain(String[]args){int[]array={1,2,3,4,5};inttar...
2 if (Array.prototype.indexOf) { 3 alert("你的浏览器支持indexOf方法。"); 4 } else { 5 alert("你的浏览器不支持indexOf方法。"); 6 } 7 if (!Array.prototype.indexOf) { 8 Array.prototype.indexOf = function(item) { 9 for (var i = 0; i < this.length; i++) { 10 if(this[...
Insert Index in Sorted Array Write a Java program to find the index of a value in a sorted array. If the value does not find return the index where it would be if it were inserted in order. Example: [1, 2, 4, 5, 6] 5(target) -> 3(index) [1, 2, 4, 5, 6] 0(target) ...
In the above example, we have used thefindIndex()method to find the index of the first even number in thenumbersarray. isEven()is a function that returns an even number. We have passedisEven()as a callback in thefindIndex()method as-numbers.findIndex(isEven). The method returns2which ...
Array Tutorials: Array Tutorial Array Const Basic Array Methods Array Search Methods Array Sort Methods Array Iteration Methods Browser Support findIndex()is an ECMAScript6 (ES6) feature. ES6 (JavaScript 2015) is supported in all modern browsers since June 2017: ...
findIndex()与find()的使用方法相同,只是当条件为true时findIndex()返回的是索引值,而find()返回的是元素。如果没有符合条件元素时findIndex()返回的是-1,而find()返回的是undefined。findIndex()当中的回调函数也是接收三个参数,与find()相同。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 const book...
public class Main{ public static int findArrayIndex(String[] arr, String str) { int iReturn = -1; for (int i = 0; i < arr.length; i++) { if (arr[i].equals(str)) { iReturn = i;//from w ww.j a va2s.c o m break; } } return iReturn; } } ...
ExampleGet your own Java Server // An array storing different ages int ages[] = {20, 22, 18, 35, 48, 26, 87, 70}; // Create a 'lowest age' variable and assign the first array element of ages to it int lowestAge = ages[0]; // Loop through the elements of the ages array ...
findIndex() 方法返回数组中通过测试的第一个元素的索引(作为函数提供)。 findIndex() 方法对数组中存在的每个元素执行一次函数: 如果找到函数返回 true 值的数组元素,则 findIndex() 返回该数组元素的索引(并且不检查剩余值) 否则返回 -1 注释:findIndex() 不会为没有值的数组元素执行函数。
Implement a method that finds the index of the K-th element equal to the minimum in an array of ints. If no such element can be found, return -1. The