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npm start：启动脚本'ng serve'失败(npm start : Failed start script 'ng serve')

 
  只是为了澄清这一点： 我对AngularJS和任何Web技术都是新手 。 在Web开发方面，我是初学者。  
  我试图安装它并且我必须承认，在许多“ 未知按钮按压 ”之后，我可能已经做了很大的混乱，或者可能没有。  
 
 我按照AngularJS网站的教程安装Angular，然后我只想推送“红色按钮”：  
npm start
 
 但它提出了一个错误说：  
   
 
 这里的实际Debug_Log：  
0 info it worked if it ends with ok
1 verbose cli [ '/home/apanpie/.nvm/versions/node/v7.4.0/bin/node',
1 verbose cli   '/home/apanpie/.nvm/versions/node/v7.4.0/bin/npm',
1 verbose cli   'start' ]
2 info using npm@4.0.5
3 info using node@v7.4.0
4 verbose config Skipping project config: /home/apanpie/.npmrc. (matches userconfig)
5 verbose run-script [ 'prestart', 'start', 'poststart' ]
6 info lifecycle apanpie@0.0.0~prestart: apanpie@0.0.0
7 silly lifecycle apanpie@0.0.0~prestart: no script for prestart, continuing
8 info lifecycle apanpie@0.0.0~start: apanpie@0.0.0
9 verbose lifecycle apanpie@0.0.0~start: unsafe-perm in lifecycle true
10 verbose lifecycle apanpie@0.0.0~start: PATH: /home/apanpie/.nvm/versions/node/v7.4.0/lib/node_modules/npm/bin/node-gyp-bin:/home/apanpie/node_modules/.bin:/home/apanpie/.nvm/versions/node/v7.4.0/bin:/home/apanpie/bin:/home/apanpie/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
11 verbose lifecycle apanpie@0.0.0~start: CWD: /home/apanpie
12 silly lifecycle apanpie@0.0.0~start: Args: [ '-c', 'ng serve' ]
13 silly lifecycle apanpie@0.0.0~start: Returned: code: 1  signal: null
14 info lifecycle apanpie@0.0.0~start: Failed to exec start script
15 verbose stack Error: apanpie@0.0.0 start: `ng serve`
15 verbose stack Exit status 1
15 verbose stack     at EventEmitter.<anonymous> (/home/apanpie/.nvm/versions/node/v7.4.0/lib/node_modules/npm/lib/utils/lifecycle.js:279:16)
15 verbose stack     at emitTwo (events.js:106:13)
15 verbose stack     at EventEmitter.emit (events.js:191:7)
15 verbose stack     at ChildProcess.<anonymous> (/home/apanpie/.nvm/versions/node/v7.4.0/lib/node_modules/npm/lib/utils/spawn.js:40:14)
15 verbose stack     at emitTwo (events.js:106:13)
15 verbose stack     at ChildProcess.emit (events.js:191:7)
15 verbose stack     at maybeClose (internal/child_process.js:885:16)
15 verbose stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:226:5)
16 verbose pkgid apanpie@0.0.0
17 verbose cwd /home/apanpie/Desktop/angularTest
18 error Linux 4.4.0-59-generic
19 error argv "/home/apanpie/.nvm/versions/node/v7.4.0/bin/node" "/home/apanpie/.nvm/versions/node/v7.4.0/bin/npm" "start"
20 error node v7.4.0
21 error npm  v4.0.5
22 error code ELIFECYCLE
23 error apanpie@0.0.0 start: `ng serve`
23 error Exit status 1
24 error Failed at the apanpie@0.0.0 start script 'ng serve'.
24 error Make sure you have the latest version of node.js and npm installed.
24 error If you do, this is most likely a problem with the apanpie package,
24 error not with npm itself.
24 error Tell the author that this fails on your system:
24 error     ng serve
24 error You can get information on how to open an issue for this project with:
24 error     npm bugs apanpie
24 error Or if that isn't available, you can get their info via:
24 error     npm owner ls apanpie
24 error There is likely additional logging output above.
25 verbose exit [ 1, true ]
 
 所以我搜遍了Google Globe，但一无所获。  
 另外，我不知道这是否相关，但在我的TypeScript代码中：  
import { View, Component } from '@angular2/core';
[... Components Here ... ]
 
 它会抛出一个错误：  
Cannot find module '@angular2/core'
 
 如果有人能够启发我，那会让我很开心！ 

 
 Just to clarify this: I'm completely new to AngularJS and to any Web Technology. I'm a beginner when it comes to Web Development. 
 I tried to install it and I've gotta admit, after many "Unknown Buttons Pressings", I may have done a big mess, or maybe not. 
 
I followed AngularJS Website's Tutorial to install Angular and then I just wanted to push the "Red Button": 
npm start
 
But it threw an error saying: 
 
 
Actual Debug_Log here: 
0 info it worked if it ends with ok
1 verbose cli [ '/home/apanpie/.nvm/versions/node/v7.4.0/bin/node',
1 verbose cli   '/home/apanpie/.nvm/versions/node/v7.4.0/bin/npm',
1 verbose cli   'start' ]
2 info using npm@4.0.5
3 info using node@v7.4.0
4 verbose config Skipping project config: /home/apanpie/.npmrc. (matches userconfig)
5 verbose run-script [ 'prestart', 'start', 'poststart' ]
6 info lifecycle apanpie@0.0.0~prestart: apanpie@0.0.0
7 silly lifecycle apanpie@0.0.0~prestart: no script for prestart, continuing
8 info lifecycle apanpie@0.0.0~start: apanpie@0.0.0
9 verbose lifecycle apanpie@0.0.0~start: unsafe-perm in lifecycle true
10 verbose lifecycle apanpie@0.0.0~start: PATH: /home/apanpie/.nvm/versions/node/v7.4.0/lib/node_modules/npm/bin/node-gyp-bin:/home/apanpie/node_modules/.bin:/home/apanpie/.nvm/versions/node/v7.4.0/bin:/home/apanpie/bin:/home/apanpie/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
11 verbose lifecycle apanpie@0.0.0~start: CWD: /home/apanpie
12 silly lifecycle apanpie@0.0.0~start: Args: [ '-c', 'ng serve' ]
13 silly lifecycle apanpie@0.0.0~start: Returned: code: 1  signal: null
14 info lifecycle apanpie@0.0.0~start: Failed to exec start script
15 verbose stack Error: apanpie@0.0.0 start: `ng serve`
15 verbose stack Exit status 1
15 verbose stack     at EventEmitter.<anonymous> (/home/apanpie/.nvm/versions/node/v7.4.0/lib/node_modules/npm/lib/utils/lifecycle.js:279:16)
15 verbose stack     at emitTwo (events.js:106:13)
15 verbose stack     at EventEmitter.emit (events.js:191:7)
15 verbose stack     at ChildProcess.<anonymous> (/home/apanpie/.nvm/versions/node/v7.4.0/lib/node_modules/npm/lib/utils/spawn.js:40:14)
15 verbose stack     at emitTwo (events.js:106:13)
15 verbose stack     at ChildProcess.emit (events.js:191:7)
15 verbose stack     at maybeClose (internal/child_process.js:885:16)
15 verbose stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:226:5)
16 verbose pkgid apanpie@0.0.0
17 verbose cwd /home/apanpie/Desktop/angularTest
18 error Linux 4.4.0-59-generic
19 error argv "/home/apanpie/.nvm/versions/node/v7.4.0/bin/node" "/home/apanpie/.nvm/versions/node/v7.4.0/bin/npm" "start"
20 error node v7.4.0
21 error npm  v4.0.5
22 error code ELIFECYCLE
23 error apanpie@0.0.0 start: `ng serve`
23 error Exit status 1
24 error Failed at the apanpie@0.0.0 start script 'ng serve'.
24 error Make sure you have the latest version of node.js and npm installed.
24 error If you do, this is most likely a problem with the apanpie package,
24 error not with npm itself.
24 error Tell the author that this fails on your system:
24 error     ng serve
24 error You can get information on how to open an issue for this project with:
24 error     npm bugs apanpie
24 error Or if that isn't available, you can get their info via:
24 error     npm owner ls apanpie
24 error There is likely additional logging output above.
25 verbose exit [ 1, true ]
 
So I've searched all around the Google Globe, but found nothing.  
Also, I don't know if this is related, but in my TypeScript code: 
import { View, Component } from '@angular2/core';
[... Components Here ... ]
 
it throws an error: 
Cannot find module '@angular2/core'
 
If anyone could enlighten me, that would make me so happy!

原文：https://stackoverflow.com/questions/41791944

更新时间：2021-07-21 13:07

最满意答案

 我知道这不能回答你为什么代码不适合你的问题，但是如果你想要一个稍微更好/更好的方法来实现你的代码，你可以把你的值扔到地图中，这样你就不必使用了一个switch声明：  
class ValueTests {
    public static final String HIGH_STRING = "high"
    public static final String LOW_STRING  = "low"

    @Test
    void stuff() {
        assert "string was high" == getValue("high")
        assert "string was low" == getValue("low")
        assert "no match" == getValue("higher")
    }

    def getValue(String key) {
        def valuesMap = [
            (HIGH_STRING): "string was high", 
            (LOW_STRING):"string was low"
        ]
        valuesMap.get(key) ?: "no match"
    }

}
 
 比switch IMO更清洁一点。 

I know this doesn't answer your question of why your code is not working for you, but if you want a slightly groovier/better way to implement your code you could throw your values into a map so then you wouldn't have to use a switch statement: 
class ValueTests {
    public static final String HIGH_STRING = "high"
    public static final String LOW_STRING  = "low"

    @Test
    void stuff() {
        assert "string was high" == getValue("high")
        assert "string was low" == getValue("low")
        assert "no match" == getValue("higher")
    }

    def getValue(String key) {
        def valuesMap = [
            (HIGH_STRING): "string was high", 
            (LOW_STRING):"string was low"
        ]
        valuesMap.get(key) ?: "no match"
    }

}
 
A little cleaner than a switch IMO.

npm start：启动脚本'ng serve'失败(npm start : Failed start script 'ng serve')

这里的实际Debug_Log：

Actual Debug_Log here:

最满意答案

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