The `=~` operator matches the regular expression against a string, and it returns either the offset of the match from the string if it is found, otherwise nil.


    /mi/ =~ &quot;hi mike&quot; # =&gt; 3 
    &quot;hi mike&quot; =~ /mi/ # =&gt; 3 

    &quot;mike&quot; =~ /ruby/ # =&gt; nil 

You can place the string/regex on either side of the operator as you can see above.

This operator matches strings against regular expressions.

    s = &#39;how now brown cow&#39;
    
    s =~ /cow/ # =&gt; 14
    s =~ /now/ # =&gt; 4
    s =~ /cat/ # =&gt; nil

If the String matches the expression, the operator returns the offset, and if it doesn&#39;t, it returns nil. It&#39;s slightly more complicated than that: [see documentation here; it&#39;s a method in the String class.][1]


  [1]: http://www.ruby-doc.org/core/String.html#method-i-3D-7E

=~ is an operator for matching regular expressions, that will return the index of the start of the match (or nil if there is no match).

See [here][1] for the documentation.


  [1]: http://www.ruby-doc.org/docs/ProgrammingRuby/html/ref_c_string.html#String._eq_sd

I am looking to break an outer for/foreach loop in PHP.

This can be done in ActionScript like so:

    top : for each(var i:MovieClip in movieClipArray)
    {
    	for each(var j:String in nameArray)
    	{
    		if(i.name == j) break top;
    	}
    }

What&#39;s the PHP equivalent?

How can I break an outer loop with PHP?

What I want to achieve is very simple: I have a Windows Forms (.NET 3.5) application that uses a path for reading information. This path can be modified by the user, by using the options form I provide.

Now, I want to save the path value to a file for later use. This would be one of the many settings saved to this file. This file would sit directly in the application folder.

I understand three options are available:

 - ConfigurationSettings file (appname.exe.config)
 - Registry
 - Custom XML file

I read that the .NET configuration file is not foreseen for saving values back to it. As for the registry, I would like to get as far away from it as possible.

Does this mean that I should use a custom XML file to save configuration settings?

If so, I would like to see code example of that (C#).

I have seen other discussions on this subject, but it is still not clear to me.



How can I save application settings in a Windows Forms application?

In ruby, I read some of the operators, but I couldn&#39;t find `=~`. What is `=~` for, or what does it mean? The program that I saw has

    regexs = (/\d+/)
    a = somestring
    if a =~ regexs

I think it was comparing if `somestring` equal to digits but, is there any other usage, and what is the proper definition of the `=~` operator?



ruby operator &quot;=~&quot;

In ruby, I read some of the operators, but I couldn't find <code>=~</code>. What is <code>=~</code> for, or what does it mean? The program that I saw has
<pre><code class="hljs language-ini">regexs = (/\d+/)
a = somestring
if a =~ regexs
</code></pre>
I think it was comparing if <code>somestring</code> equal to digits but, is there any other usage, and what is the proper definition of the <code>=~</code> operator?

I have some code that needs to rescue multiple types of exceptions in ruby:

    begin
      a = rand
      if a &gt; 0.5
        raise FooException
      else
        raise BarException
      end
    rescue FooException, BarException
      puts &quot;rescued!&quot;
    end

What I&#39;d like to do is somehow store the list of exception types that I want to rescue somewhere and pass those types to the rescue clause:

    EXCEPTIONS = [FooException, BarException]

and then:

    rescue EXCEPTIONS

Is this even possible, and is it possible without some really hack-y calls to `eval`? I&#39;m not hopeful given that I&#39;m seeing `TypeError: class or module required for rescue clause` when I attempt the above. 

Passing multiple error classes to ruby&#39;s rescue clause in a DRY fashion

I&#39;m trying to use `Net::HTTP.get()` for an https URL:

    @data = Net::HTTP.get(uri, Net::HTTP.https_default_port())

However, I get the following result when I try to print the results:

&gt; can&#39;t convert URI::HTTPS into String

What&#39;s the deal? I&#39;m using Ruby 1.8.7 (OS X)


Using Net::HTTP.get for an https url

I have fields `hr` and `min`, both integers in my application. For `hr` field, if the user enters &quot;1&quot; I would like Rails to automatically pad it to &quot;01&quot; before saving it to the database. Also for the `min` field if the user enter &quot;0&quot; it should put in as &quot;00&quot;.

How can I do this?

leading zeros in rails

I need the path of the referrer. I don&#39;t want the domain name. For example, if the referrer is
`http://www.google.com/adsense` I want `/adsense`.

How to get request referer path?

I was trying to use [Thin][1] app server and had one issue.

When nginx [proxies][2] the request to Thin (or Unicorn) using `proxy_pass http://my_app_upstream;` the application receives the modified URL sent by nginx (`http://my_app_upstream`). 

What I want is to pass the original URL and the original request from client with no modification as the app relies heavily on it.

The nginx&#39; [doc][2] says:

&gt; If it is necessary to transmit URI in
&gt; the unprocessed form then directive
&gt; proxy_pass should be used without URI
&gt; part.

But I don&#39;t understand how exactly to configure that as the related sample is actually using URI:


    location  /some/path/ {
      proxy_pass   http://127.0.0.1;
    }


So could you please help me figuring out how to **preserve the original request URL** from the client?


  [1]: http://code.macournoyer.com/thin/
  [2]: http://wiki.nginx.org/HttpProxyModule#proxy_pass

How to preserve request url with nginx proxy_pass

Is there a way to do something similar to either of the following:

    var1 = 10; var2 = 20;
    var operator = &quot;&lt;&quot;;
    console.log(var1 operator var2); // returns true

-- OR --

    var1 = 10; var2 = 20;
    var operator = &quot;+&quot;;
    total = var1 operator var2; // total === 30

Are Variable Operators Possible?

I love doing this sort of thing in Perl: `$foo = $bar || $baz` to assign `$baz` to `$foo` if `$bar` is empty or undefined. You also have `$foo ||= $bletch` which will only assign `$bletch` to `$foo` if `$foo` is not defined or empty.

The ternary operator in this situation is tedious and tiresome. Surely there&#39;s a simple, elegant method available in PHP?

Or is the only answer a custom function that uses isset()? 

Best way to give a variable a default value (simulate Perl ||, ||= )

I remember reading a while back in regards to logical operators that in the case of `OR`, using `||` was better than `or` (or vice versa).

I just had to use this in my project when it came back to me, but I can&#39;t remember which operator was recommended or if it was even true.

Which is better and why?




Logical Operators, || or OR?

Anyone care to explain why these two pieces of code exhibit different results?

VB.NET v4.0


    Dim p As Integer = 16
    Dim i As Integer = 10
    Dim y As Integer = p / i
    //Result: 2


C# v4.0

    int p = 16;
    int i = 10;
    int y = p / i;
    //Result: 1

VB.NET vs C# integer division

I am reading Accelerated C++ by Koenig. He writes that &quot;the new idea is that we can use + to concatenate a string and a string literal - or, for that matter, two strings (but not two string literals).

Fine, this makes sense I suppose. Now onto two separate exercises meant to illuminate this . 

Are the following definitions valid?

    const string hello = &quot;Hello&quot;;
    
    const string message = hello + &quot;,world&quot; + &quot;!&quot;;

Now, I tried to execute the above and it worked! So I was happy.

Then I tried to do the next exercise; 

    const string exclam = &quot;!&quot;;
    
    const string message = &quot;Hello&quot; + &quot;,world&quot; + exclam;

This did not work. Now I understand it has something to do with the fact that you cannot concatenate two string literals, but I don&#39;t understand the semantic difference between why I managed to get the first example to work (isn&#39;t &quot;,world&quot; and &quot;!&quot; two string literals? Shouldn&#39;t this not have worked?) but not the second.


Content Type	Original Author	Original Content on Stackoverflow
Question	kamen raider	View Question on Stackoverflow
Solution 1 - Ruby	Mike Lewis	View Answer on Stackoverflow
Solution 2 - Ruby	DigitalRoss	View Answer on Stackoverflow
Solution 3 - Ruby	Tim Destan	View Answer on Stackoverflow

ruby operator "=~"

Ruby Problem Overview

Ruby Solutions

Solution 1 - Ruby

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Solution 3 - Ruby

How can I save application settings in a Windows Forms application?

How can I break an outer loop with PHP?

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