**If you use ruby 1.9.2, you can use**:

    &gt;&gt; Float::INFINITY #=&gt; Infinity
    &gt;&gt; 3 &lt; Float::INFINITY #=&gt; true

Or you can create your own constant using the following*:  
I&#39;ve checked that in Ruby 1.8.6, 1.8.7, and 1.9.2 you have [Float.infinite?][1].


    PositiveInfinity = +1.0/0.0 
    =&gt; Infinity
    
    NegativeInfinity = -1.0/0.0 
    =&gt; -Infinity
    
    CompleteInfinity = NegativeInfinity..PositiveInfinity
    =&gt; -Infinity..Infinity


&lt;sup&gt;*I&#39;ve verified this in Ruby 1.8.6 and 1.9.2&lt;/sup&gt;


  [1]: http://www.ruby-doc.org/core/classes/Float.html#M000147
  [2]: http://stackoverflow.com/questions/5778295/how-to-express-infinity-in-ruby/5778508#5778508


No keyword, but 1.9.2 has a constant for this:

    &gt;&gt; Float::INFINITY #=&gt; Infinity
    &gt;&gt; 3 &lt; Float::INFINITY #=&gt; true

http://www.ruby-doc.org/stdlib-1.9.3/libdoc/bigdecimal/rdoc/BigDecimal.html#label-Infinity

    1.9.3p429 :025 &gt; BigDecimal(&#39;Infinity&#39;)
     =&gt; #&lt;BigDecimal:7f8a6c548140,&#39;Infinity&#39;,9(9)&gt;
    1.9.3p429 :026 &gt; BigDecimal(&#39;-Infinity&#39;)
     =&gt; #&lt;BigDecimal:7f8a6a0e3728,&#39;-Infinity&#39;,9(9)&gt;
    1.9.3p429 :027 &gt; 3 &lt; BigDecimal(&#39;Infinity&#39;)
     =&gt; true

    1.9.3p429 :028 &gt; BigDecimal::INFINITY
     =&gt; #&lt;BigDecimal:7f8a6ad046d8,&#39;Infinity&#39;,9(9)&gt;

Which is the key on the keyboard having the keycode as `13`?

    switch(key) {
      case 37: 
        $.keynav.goLeft();
        break;
      case 38: 
        $.keynav.goUp();
        break;
      case 39: 
        $.keynav.goRight();
        break;
      case 40: 
        $.keynav.goDown();
        break;
      case 13: 
        $.keynav.activate();
        break;
    }

keycode 13 is for which key

I have a question concerning llvm, clang, and gcc on OS X. 

What is the difference between the llvm-gcc 4.2, llvm 2.0 and clang? I know that they all build on llvm but how are they different? 

Besides faster compiling, what is the advantage of llvm over gcc?

LLVM vs clang on OS X

Is there a keyword to express Infinity in Ruby?

How to express infinity in Ruby?

<p>Is there a keyword to express Infinity in Ruby?</p>


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;

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?

How can I represent an infinite number in python? No matter which number you enter in the program, no number should be greater than this representation of infinity.

How can I represent an infinite number in Python?

I have an `int a` that needs to be equal to &quot;infinity&quot;. This means that if

    int b = anyValue;

`a&gt;b` is always true.

Is there any feature of C++ that could make this possible?

Setting an int to Infinity in C++

Does Java have anything to represent infinity for every numerical data type? How is it implemented such that I can do mathematical operations with it?

E.g.

    int myInf = infinity; //However it is done
    myInf + 5; //returns infinity
    myInf*(-1); //returns negative infinity

I have tried using very large numbers, but I want a proper, **easy** solution.

How to implement infinity in Java?

It seems to me that the code

    console.log(1 / 0)
should return `NaN`, but instead it returns `Infinity`. However this code:

    console.log(0 / 0)
*does* return `NaN`. Can someone help me to understand the reasoning for this functionality? Not only does it seem to be inconsistent, it also seems to be wrong, in the case of `x / 0` where `x !== 0`

In JavaScript, why does zero divided by zero return NaN, but any other divided by zero return Infinity?

I have an array:

    x =  numpy.array([-inf, -inf, 37.49668579])

Is there a way to change the -inf values to just 0?



Content Type	Original Author	Original Content on Stackoverflow
Question	Amokrane Chentir	View Question on Stackoverflow
Solution 1 - Ruby	Matt	View Answer on Stackoverflow
Solution 2 - Ruby	Michael Kohl	View Answer on Stackoverflow
Solution 3 - Ruby	davidtingsu	View Answer on Stackoverflow

How to express infinity in Ruby?

Ruby Problem Overview

Ruby Solutions

Solution 1 - Ruby

Solution 2 - Ruby

Solution 3 - Ruby

LLVM vs clang on OS X

keycode 13 is for which key

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