use wrappers, example:

    $ which jekyll
    # /path/to/rvm/gems/ruby-version/bin/jekyll

in the returned path replace `bin` with `wrappers` so you get:

    /path/to/rvm/gems/ruby-version/wrappers/jekyll

this is a script that will load proper environment and fix your problem, wrappers are generated automatically withing RVM.

You need to refresh the `executable-hooks` to the latest version by running following command in the `Terminal`:

`sudo gem install --user-install executable-hooks`

I had the same problem, but I have `bundler`, not `rubygems-bundler`, and my `gem` doesn&#39;t recognise `regenerate_binstubs`.

`rvm all-gemsets do gem update bundler` installed bundler 1.7.11 and fixed it for me.

Updating ruby gems worked for me 

    gem install rubygems-update
    update_rubygems

faslane env: ruby_executable_hooks: No such file or directory  
re-install faslane

```
sudo gem install fastlane -NV
```

In Herb Sutter&#39;s CppCon 2014 talk Back to Basics: Modern C++ Style he refers on slide 28 ([a web copy of the slides are here][1]) to this pattern:

    class employee {
      std::string name_;
    public:
      void set_name(std::string name) noexcept { name_ = std::move(name); }
    };

He says that this is problematic because when calling set_name() with a temporary, noexcept-ness isn&#39;t strong (he uses the phrase &quot;noexcept-ish&quot;).

Now, I have been using the above pattern pretty heavily in my own recent C++ code mainly because it saves me typing two copies of set_name() every time - yes, I know that can be a bit inefficient by forcing a copy construction every time, but hey I am a lazy typer. However Herb&#39;s phrase &quot;This noexcept is *problematic*&quot; worries me as I don&#39;t get the problem here: std::string&#39;s move assignment operator is noexcept, as is its destructor, so set_name() above seems to me to be guaranteed noexcept. I do see a potential exception throw by the compiler *before* set_name() as it prepares the parameter, but I am struggling to see that as problematic.

Later on on slide 32 Herb clearly states the above is an anti-pattern. Can someone explain to me why lest I have been writing bad code by being lazy?

  [1]: https://github.com/CppCon/CppCon2014/blob/master/Presentations/Back%20to%20the%20Basics!%20Essentials%20of%20Modern%20C++%20Style/Back%20to%20the%20Basics!%20Essentials%20of%20Modern%20C++%20Style%20-%20Herb%20Sutter%20-%20CppCon%202014.pdf?raw=true

Why is value taking setter member functions not recommended in Herb Sutter&#39;s CppCon 2014 talk (Back to Basics: Modern C++ Style)?

To be honest `go` has spoiled me. With `go` I got used to having a strict formatting standard that is being enforced by my editor (vim) and is almost accepted and followed by everybody else on the team and around the world.

I wanted to format JSON files on save the same way. 

Question: How to auto format/indent/lint json files on save in vim.


How to auto format JSON on save in Vim

I just deploy jekyll in a vps, and config git post-receive hook on it. When I push blog update to vps from my laptop, I run into this error:

    remote: /usr/bin/env: ruby_executable_hooks: No such file or directory
I searched for a while, and tried the method proposed in this post: https://stackoverflow.com/questions/18936933/bundle-update-env-ruby-executable-hooks-no-such-file-or-directory, i.e., executing the commands below:

    rvm @global do gem regenerate_binstubs
    gem regenerate_binstubs
But it doesn&#39;t help, the error remains. Since I&#39;m not familiar with rvm or ruby, could anyone give me a hint?

How to solve &quot;/usr/bin/env: ruby_executable_hooks: No such file or directory&quot;?

I just deploy jekyll in a vps, and config git post-receive hook on it. When I push blog update to vps from my laptop, I run into this error:
<pre><code class="hljs language-javascript">remote: /usr/bin/env: ruby_executable_hooks: No such file or directory
</code></pre>
I searched for a while, and tried the method proposed in this post: <a href="https://stackoverflow.com/questions/18936933/bundle-update-env-ruby-executable-hooks-no-such-file-or-directory" target="_blank" rel="noopener noreferrer">https://stackoverflow.com/questions/18936933/bundle-update-env-ruby-executable-hooks-no-such-file-or-directory</a>, i.e., executing the commands below:
<pre><code class="hljs language-java">rvm @global do gem regenerate_binstubs
gem regenerate_binstubs
</code></pre>
But it doesn't help, the error remains. Since I'm not familiar with rvm or ruby, could anyone give me a hint?

Using a Rails 4 app I would like Rubocop to ignore lines with comments (just a comment or some code with an end of line comment) when checking if a line is to long. Is there a way to do this?

Rubocop Linelength: How to ignore lines with comments?

I want to call a Ruby script from the command line, and pass in parameters that are key/value pairs.

Command line call:

    $ ruby my_script.rb --first_name=donald --last_name=knuth

my_script.rb:

    puts args.first_name + args.last_name

What is the standard Ruby way to do this? In other languages I usually have to use an option parser. In Ruby I saw we have `ARGF.read`, but that does not seem to work key/value pairs like in this example.

[OptionParser][1] looks promising, but I can&#39;t tell if it actually supports this case.


  [1]: http://ruby-doc.org/stdlib-2.1.1/libdoc/optparse/rdoc/OptionParser.html#method-i-getopts

Parse command line arguments in a Ruby script

I get an error `AWS::S3::Errors::InvalidRequest The authorization mechanism you have provided is not supported. Please use AWS4-HMAC-SHA256.` when I try upload file to S3 bucket in new Frankfurt region. All works properly with `US Standard` region.

Script:

    backup_file = &#39;/media/db-backup_for_dev/2014-10-23_02-00-07/slave_dump.sql.gz&#39;
    s3 = AWS::S3.new(
        access_key_id:     AMAZONS3[&#39;access_key_id&#39;],
        secret_access_key: AMAZONS3[&#39;secret_access_key&#39;]
    )
 
    s3_bucket = s3.buckets[&#39;test-frankfurt&#39;]
 
    # Folder and file name
    s3_name = &quot;database-backups-last20days/#{File.basename(File.dirname(backup_file))}_#{File.basename(backup_file)}&quot;
 
    file_obj = s3_bucket.objects[s3_name]
    file_obj.write(file: backup_file)

aws-sdk (1.56.0)

How to fix it?

Thank you.

The authorization mechanism you have provided is not supported. Please use AWS4-HMAC-SHA256

I dont know how to install the latest Ruby on Ubuntu. 

First I installed the default Ruby 1.9.3, using

    sudo apt-get install ruby

Then I tried to install the 2.0 version using

    sudo apt-get install ruby2.0

My version of Ruby is still &quot;ruby 1.9.3p484 (2013-11-22 revision 43786) [x86_64-linux])&quot;

What should I do? 

How to install Ruby 2.1.4 on Ubuntu 14.04

I was reading the Ruby documentation and got confused with the difference between `gsub` and `tr`. What is the difference between the two?

What is the difference between tr and gsub?

I&#39;ve been looking for a solution on how I can use multiple ssh keys and I figured out, that it will work with a config file in the .ssh directory, but it doesn&#39;t work on windows.

My problem is that I&#39;m using a private key to access a git server, so it looks like this:
ssh://git@example.com/directory , it works fine when I&#39;m using TortoiseGit, &#39;cause there is a possibility to choose the private key.

But I want to use the git rep in my IntelliJ IDEA and there is just the option to use the git native shell and it also works, if I put the key, called id_rsa ,into the .ssh folder. Now I want to use multiple ssh keys (so my key will get the name &quot;id_rsa_test&quot;, so how do I configure the .ssh/config file under Windows, that it works with a usual git server?

The most examples I found yet are just for the use with github.


.ssh/config file for windows (git)

I used git for the first time and I set my user name and user mail. The commands I used are below:

    git config --global user.email &quot;bob@example.com&quot;
    git config user.email &quot;bob@example.com&quot;
    git config --global user.name &quot;bob&quot;
    git config user.name &quot;bob&quot;

When I run `git commit --author &quot;bob&quot;` , I got an error `fatal: No existing author found with &#39;bob&#39;`. How can I set user name and email?

fatal: No existing author found with &#39;XXX&#39;

I saw a lot of examples for `.gitignore` files for **AndroidStudio**, some have `.idea` in them, and some don&#39;t.

Is there a good reason not to add the entire .idea dir to .gitignore?

If it should not be completely ignored, are there specific files inside .idea (such as .iml) that should be in .gitignore? 

Android studio - should the entire .idea directory be in git ignore?

So I am new to Android development and Android Studio.

I used Android Studio to create an Android project, and each time I wanted to commit the code to GitHub, I switched over to the command line and committed/pushed the code from there. 

However, I realize now that Android Studio has it&#39;s own features for connecting to GitHub. I&#39;d like to use those features. 

Since the project already exists, I prefer not to just create a new GitHub repository from Android Studio and delete the old one. I just want to connect the existing GitHub repository with the Android Studio project.

How can I sync these up?

How to connect existing Android Studio project to existing Github repository

Use-case:

1. Command-line application (which is deployed to a 3rd party machine) needs to be able to download a tarball copy of a private repo that belongs to an organization via the GitHub API (v3)

2. Application should only be able to access this one private repo and no other repos with read-only permission.


I have been able to accomplish (1) by creating an authorization for the application after registering a client_id/secret on my github account. However, it does not seem that the tokens returned by the authorization allow read-only access to the repo nor are they restricted to one repo (e.g. one could potentially use the token to modify this repo along with others belonging to the organization).

Is it possible to restrict access via the proper scope? I don&#39;t see anything relevant in the API docs (https://developer.github.com/v3/oauth/#scopes). 


GitHub OAuth2 Token: How to restrict access to read a single private repo

I have a new mac pro (OS X 10.9.5) that I get to set up from scratch. I want to install RVM and the first thing it says to do is: 

&gt; Install mpapis public key (might need `gpg2` and or `sudo`)
&gt;
&gt;     gpg --keyserver hkp://keys.gnupg.net --recv-keys D39DC0E3

When I tried I got:

    gpg --keyserver hkp://keys.gnupg.net --recv-keys D39DC0E3
    zsh: command not found: gpg

I&#39;ve tried to find a good guide on how to overcome this that also looks trustworthy but I&#39;ve had no luck.

Can someone explain what `gpg` is, why I dont already have it, and how do I get it the right way.

How to resolve &quot;gpg: command not found&quot; error during RVM installation?

I&#39;m attempting to install `jekyll` and I&#39;ve encountered an error. I&#39;m running Mac OS X 10.11.4 (El Capitan).

    $gem install jekyll
    ERROR : While executing gem ... (Gem::Exception)
            Unable to require openssl, install OpenSSL and rebuild ruby (preferred) or use non-HTTPS sources
    $gem source -l
    https://ruby.taobao.org
    $which openssl
    /usr/local/bin/openssl

I welcome your suggestions how to resolve this error.

Unable to require openssl, install OpenSSL and rebuild ruby (preferred) or use non-HTTPS sources

I&#39;m currently experiencing an issue with my new rails application, more specifically:

 - Rails 5.2.0
 - Ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-darwin17]
 - rvm 1.29.4 (latest) by Michal Papis, Piotr Kuczynski, Wayne E. Seguin [https://rvm.io]

When I run `rails c`, it produces a warning links to fileutils gem as the following:

    `/usr/local/Cellar/ruby/2.5.1/lib/ruby/2.5.0/fileutils.rb:90:` `warning:` `already` initialized constant FileUtils::VERSION
    /usr/local/lib/ruby/gems/2.5.0/gems/fileutils-1.1.0/lib/fileutils.rb:92: warning: previous definition of VERSION was here
    /usr/local/Cellar/ruby/2.5.1/lib/ruby/2.5.0/fileutils.rb:1188: warning: already initialized constant FileUtils::Entry_::S_IF_DOOR
    /usr/local/lib/ruby/gems/2.5.0/gems/fileutils-1.1.0/lib/fileutils.rb:1267: warning: previous definition of S_IF_DOOR was here
    /usr/local/Cellar/ruby/2.5.1/lib/ruby/2.5.0/fileutils.rb:1446: warning: already initialized constant FileUtils::Entry_::DIRECTORY_TERM
    /usr/local/lib/ruby/gems/2.5.0/gems/fileutils-1.1.0/lib/fileutils.rb:1541: warning: previous definition of DIRECTORY_TERM was here
    /usr/local/Cellar/ruby/2.5.1/lib/ruby/2.5.0/fileutils.rb:1448: warning: already initialized constant FileUtils::Entry_::SYSCASE
    /usr/local/lib/ruby/gems/2.5.0/gems/fileutils-1.1.0/lib/fileutils.rb:1543: warning: previous definition of SYSCASE was here
    /usr/local/Cellar/ruby/2.5.1/lib/ruby/2.5.0/fileutils.rb:1501: warning: already initialized constant FileUtils::OPT_TABLE
    /usr/local/lib/ruby/gems/2.5.0/gems/fileutils-1.1.0/lib/fileutils.rb:1596: warning: previous definition of OPT_TABLE was here
    /usr/local/Cellar/ruby/2.5.1/lib/ruby/2.5.0/fileutils.rb:1555: warning: already initialized constant FileUtils::LOW_METHODS
    /usr/local/lib/ruby/gems/2.5.0/gems/fileutils-1.1.0/lib/fileutils.rb:1650: warning: previous definition of LOW_METHODS was here
    /usr/local/Cellar/ruby/2.5.1/lib/ruby/2.5.0/fileutils.rb:1562: warning: already initialized constant FileUtils::METHODS
    /usr/local/lib/ruby/gems/2.5.0/gems/fileutils-1.1.0/lib/fileutils.rb:1657: warning: previous definition of METHODS was here

I follow all the step as outlined in this guideline `http://railsapps.github.io/installrubyonrails-mac.html`.

You can replicate the issue by just following the guideline or with the following steps:

 1. rvm install ruby-2.5.1
 2. rails new app
 3. cd app
 4. gem update
 5. bundle update

After observing and working around, I&#39;ve found that the default version of fileutils come with Ruby 2.5.* is 1.0.2 and the `gem update` command installs a another newer version 1.1.0. Therefore, there are two versions of `fileutils` are loaded when I run the `rails c`. 

To deal with this issue, I append `--default` option to the `gem update` command. 

    gem update --default

As a result, I got two default versions which can be seen by running `gem list | grep fileutils`. This is the only way I can get rid the warning.

    mac: gem list | grep fileutils
    fileutils (default: 1.1.0, default: 1.0.2)

I write this question with, kind of, answer just to share with someone who may experience the same issue. I spent hours to sort it out as I couldn&#39;t find any helps on the internet.

***Note***: the same issue happens when I use `rbenv` instead of `rvm` on macOS Sierra.

Please let me know if anyone has a better approach to deal with such an issue.

Cheers,

Rails 5.2.0 with Ruby 2.5.1 console - `warning:` `already` initialized constant FileUtils::VERSION

I use jekyll to write post and show it in GitHub-pages. My source file is written with markdown.     

How can I insert formula into the markdown file?     

**I don&#39;t want to save the formula into an image and load the image in markdown file.** I actually want to write latex formula in markdown file directly.

How to support latex in GitHub-pages?

My jekyll blog template have links to resources and pages like so:

    {{ site.url }}/my-page.html

This works well in deployment, but when I run `jekyll serve` in development, all of the links point to the live page instead of the development page.

    my-site-url/my-page.html
    
    # But I want this in development
    localhost:4000/my-page.html


Is there a way to make jekyll use a different `{{ site.url }}` in development?

Change site.url to localhost during jekyll local development

Is there a way to comment out an include statement inside an HTML file using Jekyll?

For example I have this inside one of my HTML files that I&#39;d like to temporarily comment out. Standard	HTML comment doesn&#39;t seem to work.

    {% include navbar.html %}			



Comment out an include statement inside an HTML file using Jekyll

I am trying to set a `favicon.ico` for my github page, but it doesn&#39;t work. When I serve it locally I see the standard &quot;empty&quot; favicon and when I push it I see the facebook icon. Why is it so? I have the right `favicon.ico` in the root directory of my project and I added the line 

    &lt;link rel=&quot;shortcut icon&quot; type=&quot;image/x-icon&quot; href=&quot;/favicon.ico&quot;&gt;

to the relevant `default.html`. You can see the sources here: https://github.com/drorata/drorata.github.io

Unable to set favicon using Jekyll and github pages

I am trying to add a new post to my Jekyll site, but I cannot see it on the generated pages when I run `jekyll serve`.

What are some common reasons for a Jekyll post to not be generated?

Content Type	Original Author	Original Content on Stackoverflow
Question	Nan Ma	View Question on Stackoverflow
Solution 1 - Ruby	mpapis	View Answer on Stackoverflow
Solution 2 - Ruby	Yas Tabasam	View Answer on Stackoverflow
Solution 3 - Ruby	PJSCopeland	View Answer on Stackoverflow
Solution 4 - Ruby	cjjenkinson	View Answer on Stackoverflow
Solution 5 - Ruby	Jayxiang	View Answer on Stackoverflow

How to solve "/usr/bin/env: ruby_executable_hooks: No such file or directory"?

Ruby Problem Overview

Ruby Solutions

Solution 1 - Ruby

Solution 2 - Ruby

Solution 3 - Ruby

Solution 4 - Ruby

Solution 5 - Ruby

How to auto format JSON on save in Vim

Why is value taking setter member functions not recommended in Herb Sutter's CppCon 2014 talk (Back to Basics: Modern C++ Style)?

Attributions