unlink

关于LinkedList的源码关注点 1.从底层数据结构，扩容策略 2.LinkedList的增删改查 3.特殊处理重点关注 4.遍历的速度，随机访问和iterator访问效率对比 1.从底层数据结构，扩容策略 构造函数不做任何操作，只要再add的时候进行数据初始化操作，以操作推动逻辑，而且linkedlist是一个双向链表，所以可以向前向后双向遍历 由于构造函数并没有任何操作，其实这里我们可以先看新增操作，并且因为用的是链表所以无法随机访问，这里随机读取就会比较慢  底层结构就是size，首节点，尾节点，还有就是一个List都有的共性就是modCount，这值用来记录这个list被修改了多少次 2.LinkedList的增删改查 2.1 add操作，linklast Add操作的实质就是进行linklast操作 linklast的操作就是再最后吧节点添加到尾部，并修正size大小 public boolean add(E ele) { linkLast(ele); return true; } 我们看看如果是在指定的位置插入元素的操作 首先要确认index再指定范围内 这里有个小优化，如果是在末尾进行添加的话，我们直接调用linklast就可以了 如果不是最后一个，那么首先要获取指定位置的node节点，我们遍历指定位置的时候 可以确定index的位置如果过半了，那么就从后往前

Something wrong is going on with one of the files in my local git repository. When I'm trying to change the branch it says: Unlink of file 'templates/media/container.html' failed. Should I try again? (y/n) What could that mean? Melissa This could mean that another program is using the file, which is preventing git from "moving" the file into or out of the working directory when you are attempting to change branches. I have had this happen on Windows Vista where eclipse is the program "using" the file. The file may not be actually open in eclipse but may have been opened by a process run by

In Unix, it's possible to create a handle to an anonymous file by, e.g., creating and opening it with creat() and then removing the directory link with unlink() - leaving you with a file with an inode and storage but no possible way to re-open it. Such files are often used as temp files (and typically this is what tmpfile() returns to you). My question: is there any way to re-attach a file like this back into the directory structure? If you could do this it means that you could e.g. implement file writes so that the file appears atomically and fully formed. This appeals to my compulsive

I have two files: b.php and test.txt <?php $b = "test.txt"; unlink($b); ?> and the error is: Warning: unlink(test.txt) [function.unlink]: Permission denied why? b.php and test.txt is 777 and the same group/login if I set 777 on the parent directory I can execute unlink but i have to set 777 and back to 755? You (as in the process that runs b.php , either you through CLI or a webserver) need write access to the directory in which the files are located. You are updating the directory content, so access to the file is not enough. Note that if you use the PHP chmod() function to set the mode of a

I need to allow users on my website to delete their images off the server after they have uploaded them if they no longer want them. I was previously using the unlink function in PHP but have since been told that this can be quite risky and a security issue. (Previous code below:) if(unlink($path.'image1.jpg')){ // deleted } Instead i now want to simply move the file into a different folder. This must be able to be done a long time after they have first uploaded the file so any time they log into their account. If i have the main folder which stores the users image(s): user/ and then within