You could do `npm view npm` there are some options you can find at https://docs.npmjs.com/cli/view

e.g. `npm view npm@1.1.2 time`


For those wondering how to view these details online. There is a slightly ugly* way I found to do that. Here&#39;s how

 1. Assuming your package name is `&lt;packageName&gt;` go to `https://registry.npmjs.org/&lt;packageName&gt;` the JSON here is probably the same thing you get when you run `npm view`
 2. Do a Ctrl+F(or equivalent) to search for `&quot;time&quot;:{` or `&quot;&lt;your_version_number&gt;&quot;`
 3. You can find the version release date under the &quot;time&quot; key. 


For example if you want to find out when version 1.1.25 (couldn&#39;t find 1.1.2) of npm was released. You can go to https://registry.npmjs.org/npm 
Search for &quot;1.1.25&quot; and iterate till you find a value under the &quot;time&quot; key or search for `&quot;time&quot;:{` (whichever is easier) and there you have it!

&gt; &quot;time&quot;:{&quot;modified&quot;:&quot;2017-10-13T18:58:10.523Z&quot;,&quot;created&quot;:&quot;2013-07-12T18:32:48.902Z&quot;,**&quot;1.1.25&quot;:&quot;2013-07-12T18:32:49.875Z&quot;**...

 *Ugly because you have to parse the JSON to understand the mess :)

For some specific versions I have found that time is not present and therefore the package is not listed when running that command. To see a list of all available times for a package run this command: `npm view &lt;package&gt; time`. To see all versions and history run `npm view &lt;package&gt; versions`.

i&#39;m having a string in c# for which i have to find a specific word &quot;code&quot; in the string and have to get the remaining string after the word &quot;code&quot;.

The string is 


&gt; &quot;Error description, **code** : -1&quot;

so i have to find the word **code** in the above string and i have to get the error code.
I have seen regex but now clearly understood. Is there any simple way ?

Need to get a string after a &quot;word&quot; in a string in c#

I understand that it&#39;s recommended to use `ConfigureAwait(false)` for `await`s in library code so that subsequent code does not run in the caller&#39;s execution context, which could be a UI thread. I also understand that `await Task.Run(CpuBoundWork)` should be used instead of `CpuBoundWork()` for the same reason.

##Example with `ConfigureAwait`##

	public async Task&lt;HtmlDocument&gt; LoadPage(Uri address)
	{
		using (var client = new HttpClient())
		using (var httpResponse = await client.GetAsync(address).ConfigureAwait(false))
		using (var responseContent = httpResponse.Content)
		using (var contentStream = await responseContent.ReadAsStreamAsync().ConfigureAwait(false))
			return LoadHtmlDocument(contentStream); //CPU-bound
	}

##Example with `Task.Run`##

	public async Task&lt;HtmlDocument&gt; LoadPage(Uri address)
	{
		using (var client = new HttpClient())
		using (var httpResponse = await client.GetAsync(address))
			return await Task.Run(async () =&gt;
			{
				using (var responseContent = httpResponse.Content)
				using (var contentStream = await responseContent.ReadAsStreamAsync())
					return LoadHtmlDocument(contentStream); //CPU-bound
			});
	}

What are the differences between these two approaches?

What are the differences between using ConfigureAwait(false) and Task.Run?

How can I see the history of a package in the Npm registry?

In particular, I want to know when https://npmjs.org/package/npm version 1.1.2 was released.

How to see package history?

<p>How can I see the history of a package in the Npm registry?</p>
<p>In particular, I want to know when <a href="https://npmjs.org/package/npm" target="_blank" rel="noopener noreferrer">https://npmjs.org/package/npm</a> version 1.1.2 was released.</p>


I&#39;m trying to decide how I want to handle validation errors in Mongoose.

## Custom error messages using node-validator

I have defined my own validation rules using [node-validator](https://github.com/chriso/node-validator), for example:

    UserSchema.path(&#39;username&#39;)
      .validate(function (username) {
        return validator.check(username).notEmpty()
      }, &#39;Username cannot be blank&#39;)

Which will generate an error that looks like this:

      username: 
       { message: &#39;Validator &quot;Username cannot be blank&quot; failed for path username&#39;,
         name: &#39;ValidatorError&#39;,
         path: &#39;username&#39;,
         type: &#39;Username cannot be blank&#39; },

## Using mongoose-validator

However, node-validator provides its own error messages. If I use the [mongoose-validator](https://github.com/leepowellcouk/mongoose-validator) Node module to plug node-validator directly into my schema, then I can use these error messages directly instead:

    var UserSchema = new Schema({
      name: { type: String, validate: [validate(&#39;notEmpty&#39;)] }
    });

Which will generate an error message that looks like:

      name: 
       { message: &#39;Validator &quot;String is empty&quot; failed for path name&#39;,
         name: &#39;ValidatorError&#39;,
         path: &#39;name&#39;,
         type: &#39;String is empty&#39; } }

I can also provide a custom error message here too:

    var UserSchema = new Schema({
      name: { type: String, validate: [validate({message: &#39;Name cannot be blank&#39; }, &#39;notEmpty&#39;)] }
    });

## Mongoose `required` flag

Mongoose lets you define a field as required:

    var UserSchema = new Schema({
      name: { type: String, required: true }
    });

Which will generate an error message that looks like:

      name: 
       { message: &#39;Validator &quot;required&quot; failed for path name&#39;,
         name: &#39;ValidatorError&#39;,
         path: &#39;name&#39;,
         type: &#39;required&#39; } }

## The question

It feels as if these validators **want** you to use their built-in error messages. For instance, I want to declare a field as `required` as seen above, but I can&#39;t find a way of customising the error message. And the mongoose-validator module did not support custom messages up until very recently, which makes me think they are an anti-pattern at the model level.

What&#39;s the best way to implement these validators? Should I let them generate their own errors and then somehow interpret them afterwards?

Handling Mongoose validation errors – where and how?

How can I download the source code of a package from npm without actually installing it (i.e. without using `npm install thepackage`)?

Download source from npm without installing it

I am having a problem installing global node modules and everything I find online says the solve is just adding -g. Which is not the problem. I believe it&#39;s a linking issue or wrong directory issue. 

Here is what I do:

    $ npm install -g express
    npm http GET https://registry.npmjs.org/express
    npm http 304 https://registry.npmjs.org/express
    npm http GET https://registry.npmjs.org/range-parser/0.0.4
    npm http GET https://registry.npmjs.org/mkdirp/0.3.3
    ...downloads correctly
    
    $ express myapp
    bash: express: command not found


However when I run the direct link location to express it works:

       $ /usr/local/share/npm/bin/express myapp
    
       create : myapp
       create : myapp/package.json
       create : myapp/app.js
    ... Builds app correctly



Where the module is: 

    $ which node
    /usr/local/bin/node
    $ node -pe process.execPath
    /usr/local/Cellar/node/0.8.20/bin/node
    $ npm link express
    /Users/bentonrr/Development/Personal/node_modules/express -&gt; /usr/local/share/npm/lib/node_modules/express


In my .bash_profile I have:

    export PATH=/usr/local/bin:$PATH
    export NODE_PATH=/usr/local/lib/node_modules:/usr/local/lib/node

Do I need to change my Node environment to download to correct folder? Is something not linking correctly? I am lost.. 

Thanks!

Other Specs:

    $ node --version
    v0.8.20
    $ npm --version
    1.2.11
    $ brew --version
    0.9.4
    OSX Version 10.8.2



Global Node modules not installing correctly. Command not found

I use `process.env` a little in my program, it seems this variable have nothing to do with my program， without it my app could work well, too.

So how can I fully use the `process.env`? Is there any document or tutorial about it?

Node.js: Is there any documentation about the process.env variable

I found serval node.js projects that have this at top of their `app.js` (as in this [openshift program][1]):

    #!/bin/env node

What does this mean? How does this work? Where is it useful?

  [1]: https://github.com/openshift/openshift-mongo-node-express-example/blob/master/server.js

What does &quot;#!/bin/env&quot; mean (at the top of a node.js script)?

I created a NPM module and I published it at version 0.0.1 

I made some changes and pushed those to github, and I would like it so that when one uses `npm install myModule` the new version is used. 

How do I tell NPM that there is a version 0.0.2?

How do I update an NPM module that I published?

How do you compare `npm`, `bower` and `volo`?

All three can be used to install JavaScript dependencies for a UI project.
I understand `npm` is more node specific.

So, when to use what?

`npm` still stands distant, but `bower` and `volo` seem to be solving exactly the same problem, although I am not able to draw a line between `npm` and `bower-volo`.

JavaScript dependency management: npm vs. bower vs. volo

I am getting into a Node.js codebase which requires that I download a few dependencies via NPM, namely jQuery.

In attempting to run `npm install jquery`, I keep getting this error:


    Your environment has been set up for using Node.js 0.8.21 (x64) and NPM
    
    C:\Users\Matt Cashatt&gt;npm install jquery
    npm http GET https://registry.npmjs.org/jquery
    npm http 304 https://registry.npmjs.org/jquery
    npm http GET https://registry.npmjs.org/jsdom
    npm http GET https://registry.npmjs.org/xmlhttprequest
    npm http GET https://registry.npmjs.org/htmlparser/1.7.6
    npm http GET https://registry.npmjs.org/location/0.0.1
    npm http GET https://registry.npmjs.org/navigator
    npm http GET https://registry.npmjs.org/contextify
    npm http 304 https://registry.npmjs.org/htmlparser/1.7.6
    npm http 304 https://registry.npmjs.org/xmlhttprequest
    npm http 304 https://registry.npmjs.org/location/0.0.1
    npm http 304 https://registry.npmjs.org/navigator
    npm http 304 https://registry.npmjs.org/jsdom
    npm http 304 https://registry.npmjs.org/contextify
    npm http GET https://registry.npmjs.org/bindings
    npm http GET https://registry.npmjs.org/cssom
    npm http GET https://registry.npmjs.org/cssstyle
    npm http GET https://registry.npmjs.org/request
    npm http 304 https://registry.npmjs.org/bindings
    
    &gt; contextify@0.1.4 install C:\Users\Matt Cashatt\node_modules\jquery\node_module
    s\contextify
    &gt; node-gyp rebuild
    
    
    C:\Users\Matt Cashatt\node_modules\jquery\node_modules\contextify&gt;node &quot;C:\Progr
    am Files\nodejs\node_modules\npm\bin\node-gyp-bin\\..\..\node_modules\node-gyp\b
    in\node-gyp.js&quot; rebuild
    npm http 304 https://registry.npmjs.org/cssstyle
    npm http 304 https://registry.npmjs.org/cssom
    npm http 304 https://registry.npmjs.org/request
    gyp ERR! configure error
    gyp ERR! stack Error: Can&#39;t find Python executable &quot;python&quot;, you can set the PYT
    HON env variable.
    gyp ERR! stack     at failNoPython (C:\Program Files\nodejs\node_modules\npm\nod
    e_modules\node-gyp\lib\configure.js:113:14)
    gyp ERR! stack     at C:\Program Files\nodejs\node_modules\npm\node_modules\node
    -gyp\lib\configure.js:82:11
    gyp ERR! stack     at Object.oncomplete (fs.js:297:15)
    gyp ERR! System Windows_NT 6.1.7601
    gyp ERR! command &quot;node&quot; &quot;C:\\Program Files\\nodejs\\node_modules\\npm\\node_modu
    les\\node-gyp\\bin\\node-gyp.js&quot; &quot;rebuild&quot;
    gyp ERR! cwd C:\Users\Matt Cashatt\node_modules\jquery\node_modules\contextify
    gyp ERR! node -v v0.8.21
    gyp ERR! node-gyp -v v0.8.4
    gyp ERR! not ok
    npm ERR! error rolling back Error: ENOTEMPTY, rmdir &#39;C:\Users\Matt Cashatt\node_
    modules\jquery\node_modules\jsdom\node_modules\request\tests&#39;
    npm ERR! error rolling back  jquery@1.8.3 { [Error: ENOTEMPTY, rmdir &#39;C:\Users\M
    att Cashatt\node_modules\jquery\node_modules\jsdom\node_modules\request\tests&#39;]
    npm ERR! error rolling back   errno: 53,
    npm ERR! error rolling back   code: &#39;ENOTEMPTY&#39;,
    npm ERR! error rolling back   path: &#39;C:\\Users\\Matt Cashatt\\node_modules\\jque
    ry\\node_modules\\jsdom\\node_modules\\request\\tests&#39; }
    npm ERR! contextify@0.1.4 install: `node-gyp rebuild`
    npm ERR! `cmd &quot;/c&quot; &quot;node-gyp rebuild&quot;` failed with 1
    npm ERR!
    npm ERR! Failed at the contextify@0.1.4 install script.
    npm ERR! This is most likely a problem with the contextify package,
    npm ERR! not with npm itself.
    npm ERR! Tell the author that this fails on your system:
    npm ERR!     node-gyp rebuild
    npm ERR! You can get their info via:
    npm ERR!     npm owner ls contextify
    npm ERR! There is likely additional logging output above.
    
    npm ERR! System Windows_NT 6.1.7601
    npm ERR! command &quot;C:\\Program Files\\nodejs\\\\node.exe&quot; &quot;C:\\Program Files\\nod
    ejs\\node_modules\\npm\\bin\\npm-cli.js&quot; &quot;install&quot; &quot;jquery&quot;
    npm ERR! cwd C:\Users\Matt Cashatt
    npm ERR! node -v v0.8.21
    npm ERR! npm -v 1.2.11
    npm ERR! code ELIFECYCLE
    npm ERR! Error: ENOENT, lstat &#39;C:\Users\Matt Cashatt\node_modules\jquery\node_mo
    dules\jsdom\node_modules\request\tests\test-pipes.js&#39;
    npm ERR! If you need help, you may report this log at:
    npm ERR!     &lt;http://github.com/isaacs/npm/issues&gt;
    npm ERR! or email it to:
    npm ERR!     &lt;npm-@googlegroups.com&gt;
    
    npm ERR! System Windows_NT 6.1.7601
    npm ERR! command &quot;C:\\Program Files\\nodejs\\\\node.exe&quot; &quot;C:\\Program Files\\nod
    ejs\\node_modules\\npm\\bin\\npm-cli.js&quot; &quot;install&quot; &quot;jquery&quot;
    npm ERR! cwd C:\Users\Matt Cashatt
    npm ERR! node -v v0.8.21
    npm ERR! npm -v 1.2.11
    npm ERR! path C:\Users\Matt Cashatt\node_modules\jquery\node_modules\jsdom\node_
    modules\request\tests\test-pipes.js
    npm ERR! fstream_path C:\Users\Matt Cashatt\node_modules\jquery\node_modules\jsd
    om\node_modules\request\tests\test-pipes.js
    npm ERR! fstream_type File
    npm ERR! fstream_class FileWriter
    npm ERR! code ENOENT
    npm ERR! errno 34
    npm ERR! fstream_stack C:\Program Files\nodejs\node_modules\npm\node_modules\fst
    ream\lib\writer.js:284:26
    npm ERR! fstream_stack Object.oncomplete (fs.js:297:15)
    npm ERR!
    npm ERR! Additional logging details can be found in:
    npm ERR!     C:\Users\Matt Cashatt\npm-debug.log
    npm ERR! not ok code 0
    
    C:\Users\Matt Cashatt&gt;

It looks like the failure is due to a missing Python installation.  Well, I have installed Python, set the variable, and rebooted and still the error.

Any clue as to what I am missing?

Content Type	Original Author	Original Content on Stackoverflow
Question	Colonel Panic	View Question on Stackoverflow
Solution 1 - node.js	pfried	View Answer on Stackoverflow
Solution 2 - node.js	raghav710	View Answer on Stackoverflow
Solution 3 - node.js	Ogglas	View Answer on Stackoverflow

How to see package history?

node.js Problem Overview

node.js Solutions

Solution 1 - node.js

Solution 2 - node.js

Solution 3 - node.js

What are the differences between using ConfigureAwait(false) and Task.Run?

Need to get a string after a "word" in a string in c#

Attributions