├── importExport
    ├── index.js
    └── moduls.js
├── os_moduls
    └── os.js
├── path_moduls
    └── path.js
├── nodes.doc
└── index.js


/importExport/index.js:
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1 | const {name, sub,add}=require("./moduls")
2 | console.log(add(5,5));
3 | console.log(sub(5,95));
4 | console.log(name);


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/importExport/moduls.js:
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 1 | 
 2 | 
 3 | const add=(a,b)=>{
 4 |     return a+b
 5 | }
 6 | const sub=(a,b)=>{
 7 |     return a-b
 8 | }
 9 | const name='kamal'
10 | 
11 | 
12 | module.exports={add, sub,name}
13 | //single export
14 | //module.exports=add;


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/os_moduls/os.js:
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 1 | const os=require("os");
 2 | 
 3 | 
 4 | const ram=os.totalmem();
 5 | console.log(`${ram/1024/1024/1024} GB`);
 6 | console.log(os.platform());
 7 | console.log(os.hostname());
 8 | console.log(os.userInfo());
 9 | console.log(os.networkInterfaces());
10 | console.log(os.type());


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/path_moduls/path.js:
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1 | const path = require("path");
2 | 
3 | console.log(path.parse("D:/Web/server/node js/1st/path_moduls/path.js"));
4 | 
5 | console.log(path.basename("D:/Web/server/node js/1st/path_moduls/path.js"));
6 | const myPath=path.parse("D:/Web/server/node js/1st/path_moduls/path.js");
7 | console.log("myPath "+myPath.name);


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/nodes.doc:
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 1 | const fs =require("fs");
 2 | 
 3 | 
 4 | var writeFileSync ="1. writeFileSync : if file not exist then its create a file and push the text and if file is exxist then its only replace all text"
 5 | //fs.writeFileSync('read.txt', writeFileSync);
 6 | 
 7 | var appendFileSync="2. appendFileSync : its map/append a new text in existing file"
 8 | //fs.appendFileSync('read.txt',appendFileSync)
 9 | 
10 | 
11 | var Buffer="its by-default showing Buffer format text like binary text";
12 | var readFileSync="3. readFileSync : its help to read existing file.."
13 | 
14 | 
15 | /* const buf_Data=fs.readFileSync("read.txt")
16 | //now we have need to convert Buffer to string format
17 | org_Data=buf_Data.toString();
18 | console.log(org_Data);
19 | */
20 | 
21 | var renameSync="this functions help to rename existing file"
22 | fs.renameSync("readWrite.txt", "nodes.doc");
23 | 


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/index.js:
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 1 | const fs = require('fs');
 2 | 
 3 | 
 4 | 
 5 | //var writeFileSync ="1. writeFileSync : if file not exist then its create a file and push the text and if file is exxist then its only replace all text"
 6 | //fs.writeFileSync('read.txt', writeFileSync);
 7 | 
 8 | //var appendFileSync="2. appendFileSync : its map/append a new text in existing file"
 9 | //fs.appendFileSync('read.txt',appendFileSync)
10 | 
11 | 
12 | // var Buffer="its by-default showing Buffer format text like binary text";
13 | // var readFileSync="3. readFileSync : its help to read existing file.."
14 | 
15 | 
16 | /* const buf_Data=fs.readFileSync("read.txt")
17 | //now we have need to convert Buffer to string format
18 | org_Data=buf_Data.toString();
19 | console.log(org_Data);
20 | */
21 | 
22 | // var renameSync="this functions help to rename existing file"
23 | // fs.renameSync("readWrite.txt", "nodes.doc");
24 | 
25 | //fs.mkdirSync('kamal/test.doc');
26 | 
27 | //fs.writeFileSync('kamal/test.doc', "wow text is added :)");
28 | 
29 | //fs.appendFileSync('kamal/test.doc', " wow text appendFileSync is added :)");
30 | 
31 | // var read =fs.readFileSync("kamal/test.doc",  "utf-8")
32 | // console.log(read);
33 | 
34 | //fs.renameSync("myText.doc",'kamal/test.doc')
35 | //fs.unlinkSync('kamal/test.doc')
36 | //fs.rmdirSync("kamal")
37 | 
38 | // fs.writeFile('test.doc',"hello world",(err)=>{
39 | //     let show=fs.readFileSync('test.doc',"utf-8")
40 | //     console.log(show);
41 | //     fs.unlinkSync("test.doc")
42 | // });
43 | 
44 | 
45 | // fs.writeFile("kamal.txt","wow i have done",(err)=>{
46 | //     console.log("run");
47 | // })
48 | 
49 | // fs.appendFile("kamal.txt"," wow i have done now :)",(err)=>{
50 | //     console.log("running");
51 | // })
52 | // fs.readFile("kamal.txt",'utf-8',(err,data)=>{
53 | //     console.log(data);
54 | // })
55 | 
56 | // fs.rename('kamal.txt',"mrkamal.txt",(err)=>{
57 | //     console.log("change");
58 | // })
59 | // fs.unlink('mrkamal.txt',()=>{
60 | //     console.log("del");
61 | // })
62 | 
63 | 


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