使用 NodeJS,我试图制作一个“笔记”管理器只是为了好玩,但是当我尝试使用 readline.question() 来获取用户关于他们想要做什么的输入(即创建一个新笔记、删除一个笔记) ),则不会显示提示。关于如何解决这个问题有什么建议吗?
项目链接 https://repl.it/@TheCoiledViper/File-Management-Node
`
fileDatabase = [];
var reply;
var FileName;
var FileContent;
var readline = require('readline');
var async = require('async');
var rl = readline.createInterface({
input: process.stdin,
output: process.stdout
});
class NewFile {
constructor(fileName,fileContent){
this.fileName = fileName
this.fileContent = fileContent
}
};
console.log("Hello! Welcome to your file management system.")
async.whilst(
function(){
return reply != "5";
},
function(callback){
rl.question("Press a number:\n1: Create a new file.\n2: View a file.\n3: Add to a file.\n4: Delete a file.\n5: Exit this program.", function(answer) {
var reply = answer
console.log(reply)
rl.close();
});
if (reply === "1") {
rl.question("What would you like to name this file?", function(answer){
var FileName = answer
rl.close()
});
rl.question("Write onto your file. You will be able to edit it later.", function(answer){
var FileContent = answer
rl.close()
});
}
setTimeout(callback, 1000);
},
function(err) {
console.err("we encountered an error", err);
}
)
`
因为您只使用在线编辑器。 (至少我正在努力解决你的提示问题。)
我会建议https://www.katacoda.com/courses/nodejs/playground https://www.katacoda.com/courses/nodejs/playground
将您的代码复制到app.js
file.
您将拥有Terminal
标签。请先安装依赖项。
npm install -g 异步
npm install -g 阅读行
借此,您将拥有node_modules
树下的文件夹。
然后点击node app.js
链接左侧以黑色突出显示。
您应该注意代码的几件事:
- 请尝试分配一些默认值
reply
也许你可以这样做var reply = 0
- 将列表代码包装到条件 if
reply = 0
.
-
if (reply === "1")
此条件将严格检查字符串。改用if(reply == 1)
.
- 并根据您的要求修改您的代码以进入下一个问题。
下面是修改后的代码:
fileDatabase = [];
var reply = 0;
var FileName;
var FileContent;
var readline = require('readline');
var async = require('async');
var rl = readline.createInterface({
input: process.stdin,
output: process.stdout
});
class NewFile {
constructor(fileName, fileContent) {
this.fileName = fileName;
this.fileContent = fileContent;
}
}
console.log('Hello! Welcome to your file management system.');
async.whilst(
function() {
return reply != '5';
},
function(callback) {
if (reply === 0) {
rl.question(
'Press a number:\n1: Create a new file.\n2: View a file.\n3: Add to a file.\n4: Delete a file.\n5: Exit this program.\n',
function(answer) {
reply = answer;
rl.close();
}
);
}
if (reply == 1) {
rl.question('What would you like to name this file?\n', function(answer) {
var FileName = answer;
rl.close();
});
rl.question(
'Write onto your file. You will be able to edit it later.\n',
function(answer) {
var FileContent = answer;
rl.close();
}
);
}
setTimeout(callback, 1000);
},
function(err) {
console.err('we encountered an error', err);
}
);
供你参考:
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