private class Itr implements Iterator<E> { int cursor; // index of next element to return int lastRet = -1; // index of last element returned; -1 if no such ... } cursor表示下一个返回元素的下标,可以理解成游标;lastRet表示上一次返回的元素下标。另ArrayList有个size属性,表示ArrayList中的元...
privateclassItrimplementsIterator<E>{ intcursor;// index of next element to return intlastRet = -1;// index of last element returned; -1 if no such intexpectedModCount = modCount; 这是Itr对象的几个类成员变量,其中我...
classMain{ publicstaticvoidmain(String[]args){ // 创建一个数组 ArrayList<String>sites=newArrayList<>(); sites.add("Google"); sites.add("Runoob"); sites.add("Taobao"); System.out.println("网站列表: "+sites); // 删除位置索引为 2 的元素 Stringelement=sites.remove(2); System.out.println...
Removesfromthe underlying collection the last element returned bythisiterator (optional operation). This method can be called only once per call to next(). The behavior of an iteratorisunspecifiedifthe underlying collectionismodifiedwhilethe iterationisinprogressinany way other than by callingthismethod...
如果该容器是vector、string或者deque,使用erase-remove idiom或者erase-remove_if idiom 如果该容器是list,使用list::remove或者list:remove_if成员函数 如果该容器是一个associative container,使用asso_con::erase成员函数或者remove_copy_if结合swap等方式
Thepop_back()is a built-in function in C++ STL that removes the last element from a string. It simply deletes the last element and adjusts the length of the string accordingly. The syntax belowyour_string.pop_back();operates on a string variable namedyour_string. It uses thepop_back(...
Thelist.size()-1gives the index of an last element. Here is an example, that removes the last element4from thepricesArrayList: importjava.util.List;importjava.util.Arrays;importjava.util.ArrayList;publicclassMain{publicstaticvoidmain(String[]args){List<Integer>prices=newArrayList<>(Arrays.asList...
1. Quick Examples of Removing the Last Element from the Tuple If you are in a hurry, below are some quick examples of removing the last element from the tuple. # Quick examples of removing last element from tuple # Consider the tuple of strings ...
int cursor; // index of next element to return int lastRet = -1; // index of last element returned; -1 if no such int expectedModCount = modCount; public boolean hasNext() { return cursor != size; } @SuppressWarnings("unchecked") ...
One of the most frequent operations we perform on an array is removing the last element. There are a few different ways to do this - but one of the most common is to use thepop()method. Consider you have the following array: