To find the index of an element in an int array in Java, you can use the indexOf() method of the Arrays class. The indexOf() method returns the index of the first occurrence of the specified element in the array, or -1 if the element is not found. Here is an example of how ...
how I find a index of element in a array? Answers (2) 0 Vulpes NA96k2.6m10y Try this: using System; class Program { static void Main() { string[] planets = {"mercury", "venus", "earth", "mars", "saturn", "jupiter", "uranus", "neptune", "pluto"}; ...
varages=[2,4,6,8,10];functioncheckAdult(age){returnage>=document.getElementById("ageToCheck").value;}functionmyFunction(){document.getElementById("demo").innerHTML=ages.findIndex(checkAdult);} 注意: findIndex() 对于空数组,函数是不会执行的。 findIndex() 并没有改变数组的原始值。 发布者:...
Write a Java program to find a specified element in a given array of elements using Ternary search. From Wikipedia, a ternary search algorithm is a technique in computer science for finding the minimum or maximum of a unimodal function. A ternary search determines either that the minimum or ma...
// returns the index of the first odd number in the arrayletfirstOdd = numbers.findIndex(isOdd); console.log(firstOdd);// Output: 2 Run Code findIndex() Syntax The syntax of thefindIndex()method is: arr.findIndex(callback(element, index, arr),thisArg) ...
function isPrime(element, index, array) { var start = 2; while (start <= Math.sqrt(element)) { if (element % start++ < 1) { return false; } } return element > 1; } console.log([4, 6, 8, 12].find(isPrime)); // undefined console.log([4, 5, 8, 12].find(isPrime)); /...
Modify the program to insert the element at the correct index in the array. Write a program to find the index of the first and last occurrence of a number. Modify the program to return the index using binary search. Write a program to find the closest index where an element could be ...
a=np.array([7,8,9,5,2,1,5,6,1])print(np.where(a==1)[0][0]) Output: 5 Use thenonzero()Function to Find the First Index of an Element in a NumPy Array Thenonzero()function returns the indices of all the non-zero elements in a numpy array. It returns tuples of multiple ...
array.find(function(currentValue, index, arr),thisValue) Parameters function()Required. A function to run for each array element. currentValueRequired. The value of the current element. indexOptional. The index of the current element. arrOptional. ...
This post will discuss how to find the index of the first occurrence of an element in a C++ array.1. Using std::findThe C++ standard library offers the std::find function which returns an iterator to the first matching element in the specified range, or an iterator to the end of the ...