To find the index of an element in an int array in Java, you can use the indexOf() method of the Arrays class.
int index = Array.IndexOf(planets, planet); planet = Char.ToUpper(planet[0]) + planet.Substring(1); if (index >= 0) { Console.WriteLine("{0} is at index {1}", planet, index); } else { Console.WriteLine("{0} isn't included in the array", planet); } Console.WriteLine(); ...
In this tutorial, we will discuss how to find the first index of an element in a numpy array. Use thewhere()Function to Find the First Index of an Element in a NumPy Array Thewhere()function from the numpy module is used to return an array that contains the indices of elements that ...
//找到匹配后,永远不会检查数组最后一个元素const evens= [2, 4, 6]; evens.find((element, index, array)=>{ console.log(element); console.log(index); console.log(array);returnelement === 4})//2//0//[2, 4, 6]//4//1//[2, 4, 6] //找到匹配后,永远不会检查数组最后一个元素con...
This post will discuss how to find the index of the first occurrence of an element in a C++ array. 1. Usingstd::find The C++ standard library offers thestd::findfunction which returns an iterator to the first matching element in the specified range, or an iterator to the end of the se...
值得注意的是:element在数组中有可能不存在,此时会返回nil。 /// Returns the first index where the specified value appears in the collection./// : 返回指定值在集合中出现的索引。/// After using `firstIndex(of:)` to find the position of a particular element/// in a collection, you can use...
In theField Mappingssection, clickAdd Field Mappingto open theAdd Field Mappingwindow. Select the field of type array to index from theField Namedropdown. Click theData Typedropdown and select the data type of the array element that you want to index. To learn more about the configuring the...
如果你用jQuery为了继续使用indexOf而不必担心兼容性问题，您可以这样做：if (!Array.prototype....
I have an array of non-repeating elements, X. I need to find the index of a specific element, 1.5 in X. I am trying to do index=find(X==1.5). However it just does not work. I gives me a "empty matrix". Does this have to do with the elements in the array being dec...
intelementToFind=30; Now, we can use the Java 8 Stream API to find the index of the specified element in the array. Here’s how you can do it: intindex=IntStream.range(0,array.length).filter(i->array[i]==elementToFind).findFirst().orElse(-1); ...