Is this Rails? (works in Sinatra)

    string.parameterize

That&#39;s it. For even more sophisticated slugging, see [ActsAsUrl][1]. It can do the following:


    &quot;rock &amp; roll&quot;.to_url =&gt; &quot;rock-and-roll&quot;
    &quot;$12 worth of Ruby power&quot;.to_url =&gt; &quot;12-dollars-worth-of-ruby-power&quot;
    &quot;10% off if you act now&quot;.to_url =&gt; &quot;10-percent-off-if-you-act-now&quot;
    &quot;kick it en Fran&#231;ais&quot;.to_url =&gt; &quot;kick-it-en-francais&quot;
    &quot;rock it Espa&#241;ol style&quot;.to_url =&gt; &quot;rock-it-espanol-style&quot;
    &quot;tell your readers 你好&quot;.to_url =&gt; &quot;tell-your-readers-ni-hao&quot;


  [1]: https://github.com/rsl/stringex

    slug = title.downcase.strip.gsub(&#39; &#39;, &#39;-&#39;).gsub(/[^\w-]/, &#39;&#39;)

`downcase` makes it lowercase. The `strip` makes sure there is no leading or trailing whitespace. The first `gsub` replaces spaces with hyphens. The second `gsub` removes all non-alpha non-dash non-underscore characters (note that this set is very close to `\W` but includes the dash as well, which is why it&#39;s spelled out here).

[to_slug][1] is a great Rails plugin that handles pretty much everything, including funky characters, but its implementation is very simple. Chuck it onto **String** and you&#39;ll be sorted. Here&#39;s the source condensed down:

    String.class_eval do
      def to_slug
        value = self.mb_chars.normalize(:kd).gsub(/[^\x00-\x7F]/n, &#39;&#39;).to_s
        value.gsub!(/[&#39;]+/, &#39;&#39;)
        value.gsub!(/\W+/, &#39; &#39;)
        value.strip!
        value.downcase!
        value.gsub!(&#39; &#39;, &#39;-&#39;)
        value
      end
    end


  [1]: https://github.com/ludo/to_slug

I&#39;ve used this gem.It&#39;s simple but helpful.

https://rubygems.org/gems/string_helpers

I like FriendlyId, the self-professed &quot;Swiss Army Bulldozer&quot; of creating slugs. https://github.com/norman/friendly_id

I just install TortoiseHg, to act as Mercurial client tool.

However, in my Vista, whenever I start, there is a `TortoiseHg Overlay Icon Server` at my notification bar.

Is quite annoying. What is the purpose of that? Can I disable it?

What is TortoiseHg Overlay Icon Server

I&#39;m using jquery tabs on a web page and when the page is refreshed it loses what ever tab I had been on and goes back to the first tab.

Has anyone come across this problem and know how to solve it?

Remember which tab was active after refresh

How should I convert a post title to a slug in Ruby?

The title can have any characters, but I only want the slug to allow `[a-z0-9-_]` (Should it allow any other characters?).

So basically:

* downcase all letters
* convert spaces to hyphens
* delete extraneous characters

Ruby post title to slug

How should I convert a post title to a slug in Ruby?
The title can have any characters, but I only want the slug to allow <code>[a-z0-9-_]</code> (Should it allow any other characters?).
So basically:
<ul>
<li>downcase all letters</li>
<li>convert spaces to hyphens</li>
<li>delete extraneous characters</li>
</ul>

I have an array of hashes:

    a=[{ &#39;foo&#39;=&gt;0,&#39;bar&#39;=&gt;1 },
       { &#39;foo&#39;=&gt;0,&#39;bar&#39;=&gt;2 },
       ... ]

I want to sort the array first by each hash&#39;s &#39;foo&#39;, then by &#39;bar&#39;. Google tells me this is how it&#39;s done:

    a.sort_by {|h| [ h[&#39;foo&#39;],h[&#39;bar&#39;] ]}

But this gives me the ArgumentError &quot;comparison of Array with Array failed&quot;. What does this mean?

Ruby sort by multiple values?

Any idea on how to create and save a new User object with devise from the ruby console?

When I tried to save it, I&#39;m getting always false. I guess I&#39;m missing something but I&#39;m unable to find any related info.

Create a devise user from Ruby console

Is `require File.expand_path(..., __FILE__)` the best way to require other files within a project?

Is require File.expand_path(..., __FILE__) the best practice?

What is the best practice if I want to `require` a relative file in Ruby *and* I want it to work in both 1.8.x and &gt;=1.9.2?

I see a few options:

  * just do `$LOAD_PATH &lt;&lt; &#39;.&#39;` and forget everything
  * do `$LOAD_PATH &lt;&lt; File.dirname(__FILE__)`
  * `require &#39;./path/to/file&#39;`
  * check if `RUBY_VERSION` &lt; 1.9.2, then define `require_relative` as `require`, use `require_relative` everywhere where it&#39;s needed afterwards
  * check if `require_relative` already exists, if it does, try to proceed as in previous case
  * use weird constructions such as &lt;code&gt;&lt;pre&gt;`require File.join(File.dirname(__FILE__), &#39;path/to/file&#39;)`&lt;/pre&gt;&lt;/code&gt; - alas they don&#39;t seem to work in Ruby 1.9 throughly, because, for example: &lt;pre&gt;&lt;code&gt;`$ cat caller.rb
require File.join(File.dirname(__FILE__), &#39;path/to/file&#39;)
$ cat path/to/file.rb
puts &#39;Some testing&#39;
$ ruby caller
Some testing
$ pwd
/tmp
$ ruby /tmp/caller
Some testing
$ ruby tmp/caller
tmp/caller.rb:1:in &#39;require&#39;: no such file to load -- tmp/path/to/file (LoadError)
        from tmp/caller.rb:1:in &#39;&lt;main&gt;&#39;`&lt;/code&gt;&lt;/pre&gt;
  * Even weirder construction: &lt;code&gt;&lt;pre&gt;`require File.join(File.expand_path(File.dirname(__FILE__)), &#39;path/to/file&#39;)`&lt;/pre&gt;&lt;/code&gt; seems to work, but it&#39;s weird and not quite good looking.
  * Use [backports][1] gem - it&#39;s kind of heavy, it requires rubygems infrastructure and includes tons of other workarounds, while I just want `require` to work with relative files.

There&#39;s a [closely related question at StackOverflow][2] that gives some more examples, but it doesn&#39;t give a clear answer - which is a best practice.

Is there are any decent, accepted-by-everyone universal solution to make my application run on both Ruby &lt;1.9.2 and &gt;=1.9.2?

&lt;h2&gt;UPDATE&lt;/h2&gt;

Clarification: I don&#39;t want just answers like &quot;you can do X&quot; - in fact, I&#39;ve already mentioned most of choices in question. I want *rationale*, i.e. *why* it is a best practice, what are its pros and cons and why it should be chosen among the others.

[1]: http://rubygems.org/gems/backports
[2]: https://stackoverflow.com/questions/4325759/is-require-file-expand-path-file-the-best-practice

Ruby: require vs require_relative - best practice to workaround running in both Ruby &lt;1.9.2 and &gt;=1.9.2

Would this be the best way to sort a hash and return Hash object (instead of Array):

    h = {&quot;a&quot;=&gt;1, &quot;c&quot;=&gt;3, &quot;b&quot;=&gt;2, &quot;d&quot;=&gt;4}
    # =&gt; {&quot;a&quot;=&gt;1, &quot;c&quot;=&gt;3, &quot;b&quot;=&gt;2, &quot;d&quot;=&gt;4}
    
    Hash[h.sort]
    # =&gt; {&quot;a&quot;=&gt;1, &quot;b&quot;=&gt;2, &quot;c&quot;=&gt;3, &quot;d&quot;=&gt;4}

Sort hash by key, return hash in Ruby

How can I insert a string at a specific index of another string? 

     var txt1 = &quot;foo baz&quot;

Suppose I want to insert &quot;bar &quot; after the &quot;foo&quot; how can I achieve that?

I thought of `substring()`, but there must be a simpler more straight forward way.

Insert a string at a specific index

Is it possible to remove the trailing slash **`/`** from a string using PHP?

Remove Trailing Slash From String PHP

I currently have the following code

    def removeControlCharacters(line):
        i = 0
        for c in line:
            if (c &lt; chr(32)):
                line = line[:i - 1] + line[i+1:]
                i += 1
        return line

This is just does not work if there are more than one character to be deleted.


Removing control characters from a string in python

I&#39;ve got an `std::string content` that I know contains UTF-8 data. I want to convert it to a [`QString`][1]. How do I do that, avoiding the from-ASCII conversion in Qt?


  [1]: http://doc.qt.io/qt-4.8/qstring.html

Convert std::string to QString

How do I serialize a Python dictionary into a string, and then back to a dictionary? The dictionary will have lists and other dictionaries inside it.


How do I serialize a Python dictionary into a string, and then back to a dictionary?

Is there a way to convert a string to lowercase? 

```
&quot;Kilometers&quot;  →  &quot;kilometers&quot;
```



How do I lowercase a string in Python?

I have a textfield in my iOS app where the user is supposed to input some text. But I was wondering if there is any way to convert the users input to lowercase letters.

I remember in C# it was something like `Convert.ToLower` but I can&#39;t seem to figure out how to do it in Objective-C.

Converting all text to lower case in Objective-C

How can I convert all values in an array to lowercase in PHP?

Something like `array_change_key_case`?

How to convert array values to lowercase in PHP?

I have been searching to find a way to convert a string value from upper case to lower case. All the search results show approaches of using `tr` command.

The problem with the `tr` command is that I am able to get the result only when I use the command with echo statement. For example:

    y=&quot;HELLO&quot;
    echo $y| tr &#39;[:upper:]&#39; &#39;[:lower:]&#39;

The above works and results in &#39;hello&#39;, but I need to assign the result to a variable as below:

    y=&quot;HELLO&quot;
    val=$y| tr &#39;[:upper:]&#39; &#39;[:lower:]&#39;
    string=$val world

When assigning the value like above it gives me an empty result.

PS: My Bash version is 3.1.17

How to convert a string from uppercase to lowercase in Bash?

The `.toLowerCase` method is giving me an error when I try to use it on numbers. This is what I have:

    var ans = 334;
    var temp = ans.toLowerCase();
    alert(temp);

And then it gives me this error:

    &#39;undefined&#39; is not a function (evaluating &#39;ans.toLowerCase()&#39;)

I don&#39;t know where I got this wrong. I always thought that numbers can also be parsed, with no change in result (maybe that&#39;s where I stuffed up).

But if that&#39;s not the error, can someone write a custom `makeLowerCase` function, to make the string lower case, perhaps using regex or something?

.toLowerCase not working, replacement function?

    str = &quot;Hello☺ World☹&quot;

Expected output is: 

    &quot;Hello:) World:(&quot;

I can do this: `str.gsub(&quot;☺&quot;, &quot;:)&quot;).gsub(&quot;☹&quot;, &quot;:(&quot;)`

Is there any other way so that I can do this in a single function call?. Something like:

    str.gsub([&#39;s1&#39;, &#39;s2&#39;], [&#39;r1&#39;, &#39;r2&#39;])

Ruby multiple string replacement

I would like to remove specific characters from strings within a vector, similar to the *Find and Replace* feature in Excel. 

Here are the data I start with:

    group &lt;- data.frame(c(&quot;12357e&quot;, &quot;12575e&quot;, &quot;197e18&quot;, &quot;e18947&quot;)

I start with just the first column; I want to produce the second column by removing the `e`&#39;s:

    group     	group.no.e
    12357e		12357
    12575e		12575
    197e18		19718
    e18947		18947



Replace specific characters within strings

of course I could replace specific arguments like this:

        mydata=c(&quot;&#225;&quot;,&quot;&#233;&quot;,&quot;&#243;&quot;)
        mydata=gsub(&quot;&#225;&quot;,&quot;a&quot;,mydata)
        mydata=gsub(&quot;&#233;&quot;,&quot;e&quot;,mydata)
        mydata=gsub(&quot;&#243;&quot;,&quot;o&quot;,mydata)
        mydata

but surely there is a easier way to do this all in onle line, right?
I dont find the gsub help to be very comprehensive on this. 

Replace multiple letters with accents with gsub

I want to replace dots in `&quot;2014.06.09&quot;` to `&quot;2014-06-09&quot;`. I am using *gsub()* function for it. If 

    x &lt;-  &quot;2014.06.09&quot;
    gsub(&#39;2&#39;, &#39;-&#39; ,x)
    # [1] &quot;-014.06.09&quot;

But when I try 

    gsub(&#39;.&#39;, &#39;-&#39;, x)
    # [1] &quot;----------&quot;

instead of `&quot;2014-06-09&quot;`.

    class(x)
    # &quot;character&quot;

Can some suggest me a way to get this right and also why it is not working for `&#39;.&#39;` (dot)


Content Type	Original Author	Original Content on Stackoverflow
Question	ma11hew28	View Question on Stackoverflow
Solution 1 - Ruby	Mark Thomas	View Answer on Stackoverflow
Solution 2 - Ruby	Ben Lee	View Answer on Stackoverflow
Solution 3 - Ruby	Jamie Rumbelow	View Answer on Stackoverflow
Solution 4 - Ruby	Diego Montadori	View Answer on Stackoverflow
Solution 5 - Ruby	Aaron Sumner	View Answer on Stackoverflow

Ruby post title to slug

Ruby Problem Overview

Ruby Solutions

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Solution 2 - Ruby

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