[CGI.escape](http://www.ruby-doc.org/stdlib-1.9.3/libdoc/cgi/rdoc/CGI.html#method-c-escape) will do it:

    &lt;% redirect_href = &quot;/redirect?#{CGI.escape target}&amp;amp;foo=bar&amp;amp;baz=some_other_stuff&quot; -%&gt;
    &lt;a href=&quot;&lt;%= redirect_href =&gt;&quot;&gt;Foo&lt;/a&gt;



Rails (`activesupport`) defines `Hash#to_param` (aliased to `Hash#to_query`):

     {foo: &#39;asd asdf&#39;, bar: &#39;&quot;&lt;#$dfs&#39;}.to_param
     # =&gt; &quot;bar=%22%3C%23%24dfs&amp;foo=asd+asdf&quot;

It&#39;s worth noting that it sorts query keys (for HTTP caching).

`Hash#to_param` also accepts optional namespace parameter:

    {name: &#39;David&#39;, nationality: &#39;Danish&#39;}.to_param(&#39;user&#39;)
    # =&gt; &quot;user[name]=David&amp;user[nationality]=Danish&quot;

**http://api.rubyonrails.org/classes/Hash.html#method-i-to_param**


[ERB::Util.url_encode](http://ruby-doc.org/stdlib-1.9.3/libdoc/erb/rdoc/ERB/Util.html#method-c-url_encode)

can be used from anywhere, part of ruby std lib.

Use either `CGI::escape` or `ERB::Util.url_encode` but not `URI.encode`.

`URI.escape` has been deprecated circa Ruby 1.9.2: https://stackoverflow.com/questions/2824126/whats-the-difference-between-uri-escape-and-cgi-escape

jshashtable states:

&gt; JavaScript&#39;s built-in objects do provide hashtable functionality using
&gt; the square brackets notation for
&gt; properties, provided your keys are
&gt; strings or numbers:

From what I know, keys are only strings, (since numbers are coerced into strings anyway). I just want to check and be sure that what is stated above is false (since keys can&#39;t be numbers).

Did ECMA standard stated anything about this..

Or is the implementation browser-specific?

Keys in Javascript objects can only be strings?

What are all the browsers that support the `window.postMessage` call now? I am looking for browsers that support it natively, not through an iFrame hack.

What browsers support the window.postMessage call now?

If I&#39;m in an RHTML view in Rails, it is easy to URL-escape something:

    &lt;a href=&quot;/redirect?href=&lt;%=u target %&gt;&quot;&gt;Foo&lt;/a&gt;

How do I do this in a string? I&#39;d like to do something like this:

    &lt;% redirect_href = &quot;/redirect?#{url_escape target}&amp;amp;foo=bar&amp;amp;baz=some_other_stuff&quot; -%&gt;
    &lt;a href=&quot;&lt;%= redirect_href =&gt;&quot;&gt;Foo&lt;/a&gt;

This must be trivial, right?

How do I URL-escape a string in Rails?

If I'm in an RHTML view in Rails, it is easy to URL-escape something:
<pre><code class="hljs language-ini">&#x3C;a href="/redirect?href=&#x3C;%=u target %>">Foo&#x3C;/a>
</code></pre>
How do I do this in a string? I'd like to do something like this:
<pre><code class="hljs language-ini">&#x3C;% redirect_href = "/redirect?#{url_escape target}&#x26;amp;foo=bar&#x26;amp;baz=some_other_stuff" -%>
&#x3C;a href="&#x3C;%= redirect_href =>">Foo&#x3C;/a>
</code></pre>
This must be trivial, right?

To get today&#39;s date I do:

    Date.today    # =&gt; Fri, 20 May 2011

I would like to get today&#39;s date in a specific timezone, say `&#39;Melbourne&#39;`.

I have the following setting in my `application.rb`:

    config.time_zone = &#39;Melbourne&#39;

and I set:

    Time.zone = &#39;Melbourne&#39;

in my application controller before each action.

However, it doesn&#39;t help (I guess because these settings affects only dates that are stored in the database).

How could I get today&#39;s date in `&#39;Melbourne&#39;` ?





Rails 3: How to get today&#39;s date in specific timezone?

What is a best practice? To use `try` or use `rescue`?

    user.try(:email)

VS

    user.email rescue nil

---------------------------

    post.try(:comments).try(:first).try(:author)

VS

    post.comments.first.author rescue nil

Is there any difference in using any of these?

Best Practice: Try vs Rescue

String

    &quot;2011-05-19 10:30:14&quot;

To 

    Thu May 19 10:30:14 UTC 2011

How can I convert specific string to this Date format ?



convert string to specific datetime format?

I have a module with a function. It resides in /lib/contact.rb:

    module Contact
      class &lt;&lt; self
        def run(current_user)
          ...
        end
      end
    end

I want to access the URL helpers like &#39;users_path&#39; inside the module. How do I do that? 

How to access URL helper from rails module

I want to test that certain conditions hold after running a migration I&#39;ve written. What&#39;s the current best way to do that?

To make this concrete: I made a migration that adds a column to a model, and gives it a default value. But I forgot to update all the pre-existing instances of that model to have that default value for the new column. None of my existing tests will catch that, because they all start with a fresh database and add new data, which will have the default. But if I push to production, I know things will break, and I want my tests to tell me that.

I&#39;ve found http://spin.atomicobject.com/2007/02/27/migration-testing-in-rails/, but haven&#39;t tried it. It&#39;s very old. Is that the state-of-the-art?

How do I test Rails migrations?

How do I create a new `URL` object using a local file, for the purpose of unit tests?

Pass a local file in to URL in Java

Is there a way to convert this:

    /C:/Users/David/Dropbox/My%20Programs/Java/Test/bin/myJar.jar
into this?:

    C:\Users\David\Dropbox\My Programs\Java\Test\bin\myJar.jar

I am using the following code, which will return the full path of the .JAR archive, or the /bin directory.

    fullPath = new String(MainInterface.class.getProtectionDomain()
    			.getCodeSource().getLocation().getPath());

The problem is, `getLocation()` returns a `URL` and I need a normal windows filename.
I have tried adding the following after `getLocation()`:

`toString()` and `toExternalForm()` both return:
	
    file:/C:/Users/David/Dropbox/My%20Programs/Java/Test/bin/

`getPath()` returns:
	
    /C:/Users/David/Dropbox/My%20Programs/Java/Test/bin/

Note the `%20` which should be converted to space.
  
Is there a quick and easy way of doing this? 

Convert URL to normal windows filename Java

In a URL, what does the `%2C` encoding mean and it uses?. 

What is %2C in a URL?

I&#39;m having a tough time getting this to work. I have a string like:

    something/([0-9])/([a-z])

And I need regex or a method of getting each match between the parentheses and return an array of matches like:

    [
      [0-9],
      [a-z]
    ]

The regex I&#39;m using is `/$(.+)$/` which does seem to match the right thing **if** there is only **one** set of parenthesis.

How can I get an array like above using any RegExp method in JavaScript? I need to return just that array because the _returned_ items in the array will be looped through to create a URL routing scheme.

RegEx to match stuff between parentheses

My question is a simple one, and it is about regular expression escaping. Do you have to escape a forward slash `/` in a regular expression? And how would you go about doing it?

Escaping a forward slash in a regular expression

How can I convert an international (e.g. Russian) String to `\u` numbers (unicode numbers)  
e.g. `\u041e\u041a` for `OK` ?

Convert International String to \u Codes in java

I am writing some JavaScript code that uses a string rendered with PHP. How can I escape single quotes (and only single quotes) in my PHP string?

    &lt;script type=&quot;text/javascript&quot;&gt;
        $(&#39;#myElement&#39;).html(&#39;say hello to &lt;?php echo $mystringWithSingleQuotes ?&gt;&#39;);
    &lt;/script&gt;

  [1]: http://pl.php.net/manual/en/function.str-replace.php
  [2]: http://pl.php.net/manual/en/function.json-encode.php


How do I escape only single quotes?

&gt; **Possible Duplicate:**  
&gt; [In Java, is there a way to write a string literal without having to escape quotes?](https://stackoverflow.com/questions/3034186/in-java-is-there-a-way-to-write-a-string-literal-without-having-to-escape-quotes)  

&lt;!-- End of automatically inserted text --&gt;

    private static final String CREATE_TABLE_EXHIBITORS = &quot;CREATE TABLE &quot;users&quot; (&quot;_id&quot; text PRIMARY KEY ,&quot;name&quot; text,&quot;body&quot; text,&quot;image&quot; text,&quot;stand_id&quot; text,&quot;begin&quot; long,&quot;end&quot; long,&quot;changedate&quot; long,&quot;website&quot; text,&quot;facebook&quot; text,&quot;myspace&quot; text,&quot;twitter&quot; text,&quot;festivallink&quot; text,&quot;favorite&quot; integer);&quot;;

Let&#39;s say I want this query to be a valid string in Java. Do I have to convert it to escape all double quotes with a trailing slash in front?

    e.g.  = &quot;CREATE TABLE \&quot;users&quot;\

Or is there a faster way to make this whole query a valid string at once? I thought you could use single quotes around the whole string to do that but that doesn&#39;t work either.




Escape double quotes in Java

How can I use spaces in the Windows Command Line?

    cmd /C C:\Program Files (x86)\WinRar\Rar.exe a D:\Hello 2\File.rar D:\Hello 2\*.*

Content Type	Original Author	Original Content on Stackoverflow
Question	Josh Glover	View Question on Stackoverflow
Solution 1 - Ruby on-Rails	Josh Glover	View Answer on Stackoverflow
Solution 2 - Ruby on-Rails	Ernest	View Answer on Stackoverflow
Solution 3 - Ruby on-Rails	Viktor Trón	View Answer on Stackoverflow
Solution 4 - Ruby on-Rails	thekingoftruth	View Answer on Stackoverflow

How do I URL-escape a string in Rails?

Ruby on-Rails Problem Overview

Ruby on-Rails Solutions

Solution 1 - Ruby on-Rails

Solution 2 - Ruby on-Rails

Solution 3 - Ruby on-Rails

Solution 4 - Ruby on-Rails

What browsers support the window.postMessage call now?

Keys in Javascript objects can only be strings?

Attributions