You should install the development support files for zlib, try:

    sudo apt-get install libz-dev

&lt;sup&gt;Other package names: `zlib1g-dev`.&lt;/sup&gt;

If you&#39;ve already `zlib` library, make sure you&#39;re compiling your code sources with `-lz`. See: &lt;https://stackoverflow.com/q/22337896/55075&gt;.

Install zlib from it&#39;s source, solve my similar error.
Download last version from [this][1] then:

    configure
    make -j4
    make install


  [1]: https://zlib.net/

I know this must have been answered some where but I just could not find it.

**Problem**: Sample each group after groupby operation.

&lt;!-- language: lang-py --&gt;

    import pandas as pd
    
    df = pd.DataFrame({&#39;a&#39;: [1,2,3,4,5,6,7],
                       &#39;b&#39;: [1,1,1,0,0,0,0]})
    
    grouped = df.groupby(&#39;b&#39;)

    # now sample from each group, e.g., I want 30% of each group


Sample each group after pandas groupby

In one of my project, I am planning to use ElasticSearch with MySQL.
I have successfully installed ElasticSearch. I am able to manage index in ES separately. but I don&#39;t know how to implement the same with MySQL.

I have read a couple of documents but I am a bit confused and not having a clear idea.



How to integrate ElasticSearch with MySQL?

I&#39;m trying to compile miniSAT on Kali Linux 64 bits but I keep getting the error message:

&gt; fatal error: zlib.h: no such file or directory

I have read that there might be a linking problem that makes the compiler unable to find the header files, but I&#39;m new to Linux and do not know how to solve that.

How to fix fatal error: zlib.h: no such file or directory?

I'm trying to compile miniSAT on Kali Linux 64 bits but I keep getting the error message:
> fatal error: zlib.h: no such file or directory
I have read that there might be a linking problem that makes the compiler unable to find the header files, but I'm new to Linux and do not know how to solve that.

I am researching CoffeeScript on the website [http://coffeescript.org/](http://coffeescript.org/), and it has the text

&gt; The CoffeeScript compiler is itself written in CoffeeScript

How can a compiler compile itself, or what does this statement mean?

How can a compiler compile itself?

I want to dynamically create a template. This should be used to build a `ComponentType` at runtime and place *(even replace)* it somewhere inside of the hosting Component. 

Until RC4 I was using `ComponentResolver`, but with RC5 I get the following message:

```none
ComponentResolver is deprecated for dynamic compilation.
Use ComponentFactoryResolver together with @NgModule/@Component.entryComponents or ANALYZE_FOR_ENTRY_COMPONENTS provider instead.
For runtime compile only, you can also use Compiler.compileComponentSync/Async.
```

I found this document ([Angular 2 Synchronous Dynamic Component Creation](https://docs.google.com/document/d/1VRNljdv-6QDY4_I0xx3DHd-IZ19QlthheMLdGGKAAzM/edit?usp=sharing))

And understand that I can use either

- Kind of dynamic `ngIf` with `ComponentFactoryResolver`. If I pass known components inside of `@Component({entryComponents: [comp1, comp2], ...})` - I can use `.resolveComponentFactory(componentToRender);`
- Real runtime compilation, with `Compiler`... 

But the question is how to use that `Compiler`? The note above says that I should call: `Compiler.compileComponentSync/Async` - so how? 

For example. I want to create *(based on some configuration conditions)* this kind of template for one kind of settings

&lt;!-- language: lang-html --&gt;

    &lt;form&gt;
       &lt;string-editor
         [propertyName]=&quot;&#39;code&#39;&quot;
         [entity]=&quot;entity&quot;
       &gt;&lt;/string-editor&gt;
       &lt;string-editor
         [propertyName]=&quot;&#39;description&#39;&quot;
         [entity]=&quot;entity&quot;
       &gt;&lt;/string-editor&gt;
       ...

and in another case this one *(`string-editor` is replaced with `text-editor`)*

&lt;!-- language: lang-html --&gt;

    &lt;form&gt;
       &lt;text-editor
         [propertyName]=&quot;&#39;code&#39;&quot;
         [entity]=&quot;entity&quot;
       &gt;&lt;/text-editor&gt;
       ...

And so on *(different number/date/reference `editors` by property types, skipped some properties for some users...)*. i.e. this is an example, the real configuration could generate much more different and complex templates.

The template is changing, so I cannot use `ComponentFactoryResolver` and pass existing ones... I need a solution with the `Compiler`.

How can I use/create dynamic template to compile dynamic Component with Angular 2.0?

I want to use C++17 features.

How can I switch compiling from C++14 to C++17 in Microsoft Visual Studio?

Or it&#39;s not avaiable in release versions of VS?

How to enable C++17 compiling in Visual Studio?

Since everything has a limit, I was wondering if there is a limit to the number of nested `for` loops or as long as I have memory, I can add them, can the Visual Studio compiler create such a program?

Of course a 64 or more nested `for` loops would be not handy to debug, but is it doable?

    private void TestForLoop()
    {
      for (int a = 0; a &lt; 4; a++)
      {
        for (int b = 0; b &lt; 56; b++)
        {
          for (int c = 0; c &lt; 196; c++)
          {
            //etc....
          }
        }
      }
    }


Is there a limit to the number of nested &#39;for&#39; loops?

I was referring [this documentation][1] and came across the compilation concept. One can use either JIT or AOT compilation. However, I found it very brief and need to know following points in details,

 - Differences between those two techniques
 - Recommendation about when to use what


  [1]: https://angular.io/docs/ts/latest/guide/ngmodule.html#bootstrap

Just-in-Time (JiT) vs Ahead-of-Time (AoT) compilation in Angular

# My goal
I am trying to install Python 2.7.5 and 3.6.5 side-by-side on my MBP with with pyenv. 

# `pyenv` Installation
Following https://stackoverflow.com/questions/18671253/how-can-i-use-homebrew-to-install-both-python-2-and-3-on-mac , I tried:


    $ pyenv install 3.6.5

Which erred with:

    python-build: use openssl from homebrew
    python-build: use readline from homebrew
    Downloading Python-3.6.5.tar.xz...
    -&gt; https://www.python.org/ftp/python/3.6.5/Python-3.6.5.tar.xz
    Installing Python-3.6.5...
    python-build: use readline from homebrew
    
    BUILD FAILED (OS X 10.13.4 using python-build 20160602)
    
    Inspect or clean up the working tree at /var/folders/d0/t8d3jjp161g2dyrd4k67ypc80000gn/T/python-build.20180426091253.34709
    Results logged to /var/folders/d0/t8d3jjp161g2dyrd4k67ypc80000gn/T/python-build.20180426091253.34709.log
    
    Last 10 log lines:
      File &quot;/private/var/folders/d0/t8d3jjp161g2dyrd4k67ypc80000gn/T/python-build.20180426091253.34709/Python-3.6.5/Lib/ensurepip/__main__.py&quot;, line 5, in &lt;module&gt;
        sys.exit(ensurepip._main())
      File &quot;/private/var/folders/d0/t8d3jjp161g2dyrd4k67ypc80000gn/T/python-build.20180426091253.34709/Python-3.6.5/Lib/ensurepip/__init__.py&quot;, line 204, in _main
        default_pip=args.default_pip,
      File &quot;/private/var/folders/d0/t8d3jjp161g2dyrd4k67ypc80000gn/T/python-build.20180426091253.34709/Python-3.6.5/Lib/ensurepip/__init__.py&quot;, line 117, in _bootstrap
        return _run_pip(args + [p[0] for p in _PROJECTS], additional_paths)
      File &quot;/private/var/folders/d0/t8d3jjp161g2dyrd4k67ypc80000gn/T/python-build.20180426091253.34709/Python-3.6.5/Lib/ensurepip/__init__.py&quot;, line 27, in _run_pip
        import pip
    zipimport.ZipImportError: can&#39;t decompress data; zlib not available
    make: *** [install] Error 1

# What have I tried
* Installing zlib: `brew install zlib`

# My question
How can I install multiple Python environment with `pyenv` on MBP?

pyenv zlib error on MacOS:

I am using this function to uncompress the body or a HTTP response if it is compressed with gzip, compress or deflate. 

    def uncompress_body(self, compression_type, body):
        if compression_type == &#39;gzip&#39; or compression_type == &#39;compress&#39;:
            return zlib.decompress(body)
        elif compression_type == &#39;deflate&#39;:
            compressor = zlib.compressobj(9, zlib.DEFLATED, -zlib.MAX_WBITS)
            compressed = compressor.compress(body)
            compressed += compressor.flush()
            return base64.b64encode(compressed)

        return body

However python throws this error message.

    TypeError: a bytes-like object is required, not &#39;_io.BytesIO&#39;
on this line:

    return zlib.decompress(body)

Essentially, how do I convert from &#39;_io.BytesIO&#39; to a bytes-like object?





Content Type	Original Author	Original Content on Stackoverflow
Question	user3043108	View Question on Stackoverflow
Solution 1 - Compilation	kenorb	View Answer on Stackoverflow
Solution 2 - Compilation	Bashid	View Answer on Stackoverflow

How to fix fatal error: zlib.h: no such file or directory?

Compilation Problem Overview

Compilation Solutions

Solution 1 - Compilation

Solution 2 - Compilation

How to integrate ElasticSearch with MySQL?

Sample each group after pandas groupby

Attributions