Instructions for using the fs.rename method in node.js_node.js

Method description:

Modify the file name to change the file storage path.

Grammar:

Copy code The code is as follows:

fs.rename(oldPath, newPath, [callback(err)])

Since this method belongs to the fs module, the fs module needs to be introduced before use (var fs= require(“fs”) )

Receive parameters:

oldPath original path

newPath New path

callback callback, passing an err exception parameter

Example:

Copy code The code is as follows:

//Rename files in the same directory:
var fs = require('fs');
fs.rename('125.txt','126.txt', function(err){
if(err){
throw err;
}
console.log('done!');
})

//Rename files under different paths. Move: (The new path must already exist. If the path does not exist, an exception will be returned)
var fs = require('fs');
fs.rename('125.txt','new/126.txt', function(err){
if(err){
throw err;
}
console.log('done!');
})

Source code:

Copy code The code is as follows:

fs.rename = function(oldPath, newPath, callback) {
callback = makeCallback(callback);
if (!nullCheck(oldPath, callback)) return;
if (!nullCheck(newPath, callback)) return;
binding.rename(pathModule._makeLong(oldPath),
pathModule._makeLong(newPath),
                  callback);
};