0501 desktop app

.gitignore

@@ -1,3 +1,4 @@
 ziliao/
 code/0201/node_modules
-code/0301/node_modules
+code/0301/node_modules
+code/0501/electron-quick-start/node_modules

code/0403/2.txt

@@ -0,0 +1 @@
+worldhelloworldhelloworldhelloworldhelloworldhelloworldhelloworldhelloworldhelloworldhelloworld

code/0403/app.js

@@ -0,0 +1,17 @@
+const fs=require("fs");
+
+
+var content=fs.readFileSync("./1.txt");
+console.log(content.toString());
+
+
+fs.writeFile("./2.txt","hello",{flag:"a"},(err)=>{
+    console.log("写入成功");
+});
+
+fs.writeFile("./2.txt","world",{flag:"a"},(err)=>{
+    console.log("写入成功");
+});
+
+
+console.log("读取文件成功");

code/0403/app2.js

@@ -0,0 +1,33 @@
+const fs=require("fs");
+
+//重命名
+/*fs.rename("./1.txt","./11.txt",(err)=>{
+    if(!err) console.log("重命名成功");
+});*/
+//判断文件是否存在
+var res=fs.existsSync("./2.txt");
+console.log(res);
+
+//获取文件基本信息
+fs.stat("./2.txt",(err,stats)=>{
+    if(err){
+         console.log("获取信息失败");
+         return false;
+    }
+
+    console.log(stats);
+
+});
+//删除文件
+if(fs.existsSync("./11.txt")){
+    fs.unlink("./11.txt");
+}
+
+if(!fs.existsSync("./c")){
+    fs.mkdir("./c");
+}
+
+
+fs.readdir(".",(err,files)=>{
+    console.log(files);
+});

code/0403/app3.js

@@ -0,0 +1,30 @@
+const path=require("path");
+const fs=require("fs");
+
+
+
+let lujing="E:\\node_study\\code\\0403\\2.txt";
+let lujing1="E:\\node_study\\code\\0403\\";
+
+
+
+
+console.log(path.basename(lujing));
+console.log(path.extname(lujing));
+console.log(path.dirname(lujing1));
+
+fs.readdir(lujing1,(err,files)=>{
+    console.log(files);
+});
+
+let newlujing=path.join("a","b","c","..","g/f/e/d","..");
+
+
+console.log(newlujing);
+
+let pathObj=path.parse(lujing);
+console.log(pathObj);
+
+
+
+

code/0404/app.js

@@ -0,0 +1,8 @@
+/*
+
+    在读写文件  或者网络传输 数据
+
+    字符串   buffer 二进制数据
+*/
+
+

code/0405/app.js

@@ -0,0 +1,12 @@
+const events = require('events');
+
+
+const myEmitter = new events();
+
+
+myEmitter.on('fangxue', () => {
+  console.log('吃饭去');
+});
+
+myEmitter.emit('fangxue');
+myEmitter.emit('fangxue');

code/0406/app.js

@@ -0,0 +1,6 @@
+const path=require("path");
+
+console.log(__dirname);
+console.log(__filename);
+
+console.log(path.extname(__filename));