splice

The man page for the splice system call says that splice may fail and set errno to EINVAL if: Target file system doesn't support splicing; neither of the descriptors refers to a pipe; or offset given for non-seekable device Which file systems support splicing? My original answer was partially incorrect, this is a major rewrite. Linux 2.6.30.10 and below In Linux 2.6.30.10 and older, splice returns EINVAL when the source or target filesystem does not support splicing. Here are the filesystems that do support splicing : in read mode : adfs, affs, afs, bfs, btrfs, coda, ecryptfs, exofs, ext2,

在开发过程中，有时我们需要删除数组中某一下标的元素。JAVA中ArrayList有remove函数。但是在JavaScript中没有直接的删除方法。我们可以利用splice来实现。 Array.splice()定义：splice() 方法向/从数组中添加/删除项目，然后返回被删除的项目。注意: 该方法会改变原始数组。 参数 描述 index 必需。整数，规定添加/删除项目的位置，使用负数可从数组结尾处规定位置。 howmany 必需。要删除的项目数量。如果设置为 0，则不会删除项目。 item1, …, itemX 可选。向数组添加的新项目。 例如: let arr = ["james","irving","kobe","wade"]; arr.splice(1,1) //在下标1处开始删除,删除一位 console.log(arr);// irving被删除 结果: 来源： https://www.cnblogs.com/robinunix/p/11590532.html

sendfile() can be used to transmit data from a "file" descriptor to a "socket" descriptor in order to get data from machine A to machine B. Is it possible to get the data at the receiving end from the "socket" descriptor to a file with similar zero-copy semantics? I think sendfile() doesn't help here because sendfile() needs the source of data to be "page/buffer" cache. Is my understanding correct? Can splice() help in this situation? You're correct about the limitation of sendfile for this. And yes, splice can help, but it's not trivial: splice requires that at least one of the source or

I wrote TCP relay server which works like peer-to-peer router (supernode). The simplest case are two opened sockets and data relay between them: clientA <---> server <---> clientB However the server have to serve about 2000 such A-B pairs, ie. 4000 sockets... There are two well known data stream relay implementations in userland (based on socketA.recv() --> socketB.send() and socketB.recv() --> socketA.send() ): using of select / poll functions (non-blocking method) using of threads / forks (blocking method) I used threads so in the worst case the server creates 2*2000 threads! I had to limit

一：向数组里面增加元素 push :向数组尾部新添加元素,返回值： 数组的长度 会改变原始数组 var a = [1,2,3,4,5]; var b = a.push(6,7); //a：[1,2,3,4,5,6,7] b：7 2. unshift :向数组头部新添加元素，返回 数组的长度 会改变原始数组 var a = [1,2,3,4,5]; var b = a.unshift(-2,-1); //a：[-2,-1,1,2,3,4,5] b：7 3 concat : 将参数添加到原数组中，构成一个新的数组，返回值： 新数组 不会改变原始数组 var a = [1,2,3,4,5]; var b = a.concat(6,7); //a：[1,2,3,4,5] b：[1,2,3,4,5,6,7] 4. splice 用于添加或删除数组中的元素 会改变原始数组 从索引为4的位置开始，加2个元素 var fruits = ["Banana", "Orange", "Apple", "Mango"]; fruits.splice(4,2,"Lemon","Kiwi"); // fruits= ["Banana", "Orange", "Apple", "Mango",,"Lemon","Kiwi"] 二：删除数组中的元素 1. splice :用于添加或删除数组中的元素,

I have the following function to add splice to a string: String.prototype.splice = function(index, howManyToDelete, stringToInsert) { var characterArray = this.split(''); Array.prototype.splice.apply(characterArray, arguments); return characterArray.join(''); } However it does quite work exactly like Array.prototype.splice , which I need it to. The array splice returns the values which were removed. So I just need to know how to set a new value to a String without having to return the value. String.prototype.splice = function(index, howManyToDelete, stringToInsert) { var characterArray = this

Update: Mr. Nemo's answer helped solve the problem! The code below contains the fix! See the nb False and nb True calls below. There is also a new Haskell package called splice (, which has OS-specific and portable implementations of best known socket to socket data transfer loops) . I have the following (Haskell) code: #ifdef LINUX_SPLICE #include <fcntl.h> {-# LANGUAGE CPP #-} {-# LANGUAGE ForeignFunctionInterface #-} #endif module Network.Socket.Splice ( Length , zeroCopy , splice #ifdef LINUX_SPLICE , c_splice #endif ) where import Data.Word import Foreign.Ptr import Network.Socket import

vue中的变异方法之splice： 增加： function add () { 　　this.list.splice(index,0,newItem) } 修改： function update () { 　　this.list.splice(index,1,newItem) } 删除： function update () { 　　this.list.splice(index,1) } 来源： https://www.cnblogs.com/wx2019/p/11401266.html