["foo","bar","baz"].index("bar")
FindLastIndex(Int32, Int32, Predicate<T>)使用FindComputer述詞委派,在集合後半部尋找最後一部計算機書籍的索引。 C# usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Xml.Linq;namespaceFind{classProgram{privatestaticstringIDtoFind ="bk109";privatestaticList<Book> Books =newList<Bo...
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.
FindLastIndex(Int32, Predicate<T>) 搜尋符合指定之述詞所定義的條件之項目,並傳回List<T>中從第一個項目延伸到指定之索引的項目範圍內,最後一個符合項目之以零為起始的索引。 FindLastIndex(Int32, Int32, Predicate<T>) 搜尋符合指定之述詞所定義的條件之項目,並傳回List<T>中包含指定之項目數目,且結束...
Searches for an element that matches the conditions defined by a specified predicate, and returns the zero-based index of the first occurrence within the List<T> or a portion of it. This method returns -1 if an item that matches the conditions is n
A.count()方法用于统计字符串里某个字符出现的次数B.find()方法检测字符串中是否包含子字符串str,如果包含子字符串返回开始的索引值,否则会报一个异常C.index()方法检测字符串中是否包含子字符串str,如果str不存在返回-1D.以上都错误相关知识点: 试题来源: 解析...
Finally, display the result by using the built-in function index() with a variable named Fruit_list.ExampleOpen Compiler Fruit_list = ['Banana', 'Apple', 1000, 'Mango'] print("String present in the index:\n") # iterate through the list of elements for i in Fruit_list: # check for...
findIndex的语法如下: array.findIndex(callback(element[, index[, array]])[, thisArg]) 其中,callback是回调函数,element表示当前遍历到的数组项,index表示当前项的下标,array表示原数组。thisArg是可选参数,用于指定回调函数中this的值。 下面是一个简单的例子,用于查找数组中第一个大于等于5的数的下标: const...
("Index of first computer book in the second half of the collection: {0}", ndx); ndx = Books.FindLastIndex(Books.Count - 1, mid, FindComputer); Console.WriteLine("Index of last computer book in the second half of the collection: {0}", ndx); } // Populates the list with sample...
List<T> 构造函数 属性 方法 添加 AddRange AsReadOnly BinarySearch 清除 包含 ConvertAll CopyTo EnsureCapacity Exists 查找 FindAll FindIndex FindLast FindLastIndex ForEach GetEnumerator GetRange IndexOf 插入 InsertRange LastIndexOf 删除 RemoveAll