If you Cmd-F and open the search pane, there is a &quot;.*&quot; button at the right side. Click it and now it&#39;s regex mode.

I find 

    (http.*)\{\.uri\}

and replace to 

    [$1]($1)

Juste to update [*@speedogoo&#39;s answer*][1] for future readers, if you do not find the regex mode in the search view, it looks like this:

[![enter image description here][2]][2]

You can also open it with the shortcut &lt;kbd&gt;Ctrl&lt;/kbd&gt;+&lt;kbd&gt;Alt&lt;/kbd&gt;+&lt;kbd&gt;/&lt;/kbd&gt; *(default)*.

---

*Note that even `^` and `$` [are already supported][3] by Atom&#39;s find-and-replace.*


  [1]: https://stackoverflow.com/a/22367119/4927984
  [2]: https://i.stack.imgur.com/0xcWC.png
  [3]: https://github.com/atom/find-and-replace/issues/497

I have some async code that I would like to add a `CancellationToken` to. However, there are many implementations where this is not needed so I would like to have a default parameter - perhaps `CancellationToken.None`. However,

```c#
Task&lt;x&gt; DoStuff(...., CancellationToken ct = null)
```

yields

&gt; A value of type &#39;&amp;lt;null&amp;gt;&#39; cannot be used as a default parameter because
&gt; there are no standard conversions to type
&gt; &#39;System.Threading.CancellationToken&#39;

and

```c#
Task&lt;x&gt; DoStuff(...., CancellationToken ct = CancellationToken.None)
```

&gt; Default parameter value for &#39;ct&#39; must be a compile-time constant

Is there any way to have a default value for `CancellationToken`?

Default parameter for CancellationToken

In my case parent `UIViewController` contains `UIPageViewController` which contains `UINavigationController` which contains `UIViewController`. I need to add a swipe gesture to the last view controller, but swipes are handled as if they belong to page view controller. I tried to do this both programmatically and via xib but with no result.

So as I understand I can&#39;t achieve my goal until `UIPageViewController` handles its gestures. How to solve this issue?

How do I Disable the swipe gesture of UIPageViewController?

I want to search and replace this

    `https://example.com/`{.uri}

to 

    [https://example.com/](https://example.com/)

With `vim` I would do a `s/`$http.*$`{.uri}/[\1](\1)/g` but that doesn&#39;t work with `atom.io`. How can I solve this?

Search and Replace with RegEx components in Atom editor

I want to search and replace this
<pre><code class="hljs language-arduino">`https://example.com/`{.uri}
</code></pre>
to
<pre><code class="hljs language-less">[https://example.com/](https://example.com/)
</code></pre>
With <code>vim</code> I would do a <code>s/</code>(http.*)<code>{.uri}/[\1](\1)/g</code> but that doesn't work with <code>atom.io</code>. How can I solve this?

Example:

    a43
    test1
    abc
    cvb
    bnm
    test2
    kfo


I need all lines between test1 and test2. Normal grep does not work in this case. Do you have any propositions?

Bash, grep between two lines with specified string

I am writing a python MapReduce word count program. Problem is that there are many non-alphabet chars strewn about in the data, I have found this post https://stackoverflow.com/questions/1276764/stripping-everything-but-alphanumeric-chars-from-a-string-in-python which shows a nice solution using regex, but I am not sure how to implement it

    def mapfn(k, v):
        print v
        import re, string 
        pattern = re.compile(&#39;[\W_]+&#39;)
        v = pattern.match(v)
        print v
        for w in v.split():
            yield w, 1

I&#39;m afraid I am not sure how to use the library `re` or even regex for that matter. I am not sure how to apply the regex pattern to the incoming string (line of a book) `v` properly to retrieve the new line without any non-alphanumeric chars.

Suggestions?

Python, remove all non-alphabet chars from string

How can I use regular expressions in Excel and take advantage of Excel&#39;s powerful grid-like setup for data manipulation?

 - In-cell function to return a matched pattern or replaced value in a string.
 - Sub to loop through a column of data and extract matches to adjacent cells.
 - What setup is necessary?
 - What are Excel&#39;s special characters for Regular expressions?

-----------

I understand Regex is not ideal for many situations ([To use or not to use regular expressions?](https://stackoverflow.com/a/4098123/2521004)) since excel can use `Left`, `Mid`, `Right`, `Instr` type commands for similar manipulations.  

How to use Regular Expressions (Regex) in Microsoft Excel both in-cell and loops

I&#39;m working on a form where one of its custom validators should only accept Persian characters.  I used the following code:

```c#
var myregex = new Regex(@&quot;^[\u0600-\u06FF]+$&quot;);
if (myregex.IsMatch(mytextBox.Text))
{
    args.IsValid = true;
}
else
{
    args.IsValid = false;
}
```

However, it seems that it can only detect Arabic characters, as it doesn&#39;t cover all Persian characters (it lacks these four: گ,چ,پ,ژ ). 

Is there a way to solve this problem?

regex for accepting only persian characters

I have read some pricing data into a pandas dataframe the values appear as:


    $40,000*
    $40000 conditions attached

I want to strip it down to just the numeric values.
I know I can loop through and apply regex 
    
    [0-9]+

to each field then join the resulting list back together but is there a not loopy way?

Thanks



pandas applying regex to replace values

I want my .ejs files to have html syntax, however, it always opens the files as Plain Text.  

In sublime you can choose &quot;Open all with current extension as...&quot; then choose your syntax.

![sublime text3 syntax][1]

I see that you can change the syntax in the left bottom corner![syntax change][2]


How do you open files with a certain type with a specific syntax? 


  [1]: http://i.stack.imgur.com/T5zBq.png
  [2]: http://i.stack.imgur.com/k5FJW.png

How do I make a default syntax by filetype in Atom text editor?

I have the Atom editor and was wondering how you can open a file or folder from the terminal in Atom. I am using a Mac. I am looking for a way to do this:

    atom . (opens folder)
    
    atom file.js (opens file)
    
    atom (opens editor)

Is this possible and how do I set it up?


How can I open the Atom editor from the command line in OS X?

I haven&#39;t been able to figure this out yet. Atom seems to use spaces as the default indentation mode. I prefer to have tabs instead though. Sublime Text has built in functionality for switching and converting indentation.

Anyone found out how to change the indentation mode of Atom?

Some screenshots from Sublime Text:

![Sublime Text indentation menu open][1]
![Sublime text indentation menu][2]


  [1]: http://i.stack.imgur.com/IZC1E.png
  [2]: http://i.stack.imgur.com/Fujwp.png

How to change indentation mode in Atom?

How do you auto-indent your code in the Atom editor? In other editors you can usually select some code and auto-indent it. 

Is there a keyboard shortcut as well?

How to auto-indent code in the Atom editor?

I am very new to Github Atom editor. It always shows hidden files such as `.git`, `.sass` in the side pane.

How to hide hidden files(dot files) in atom editor&#39;s side pane.


Content Type	Original Author	Original Content on Stackoverflow
Question	wintermeyer	View Question on Stackoverflow
Solution 1 - Regex	speedogoo	View Answer on Stackoverflow
Solution 2 - Regex	Mistalis	View Answer on Stackoverflow

Search and Replace with RegEx components in Atom editor

Regex Problem Overview

Regex Solutions

Solution 1 - Regex

Solution 2 - Regex

How do I Disable the swipe gesture of UIPageViewController?

Default parameter for CancellationToken

Attributions