I am using iframes in my page, and have stumbled across a weird issue. I set the iframe css like so

    iframe {
        margin: none;
        padding: none;
        background: blue; /* this is just to make the frames easier to see */
        border: none;
    }
However, there is still whitespace surrounding the iframe. I tested it in both Chrome and Firefox, and it&#39;s the same. I searched around, and I couldn&#39;t find anything. This whitespace doesn&#39;t show up in the Chrome console, either.
Also, I already have the following CSS as well:

    html, body {
        margin: 0px;
        padding: 0px;
        border: 0px;
        width: 100%;
        height: 100%;
    }
JSFiddle: [here][1]


  [1]: http://jsfiddle.net/mM6AB/1/ &quot;JSFiddle&quot;

Remove the Extra Whitespace Surrounding Iframes?

What is the fastest way to replace extra white spaces to one white space?  
e.g.

*from* 

    foo      bar 
*to*

    foo bar



c# Fastest way to remove extra white spaces

I&#39;ve tried editing a php file in TextWrangler with line endings set to Unix, in NetBeans, and in vim. When I save the diff to a patch and then try to apply it, it gives whitespace errors. When I type `git diff` I can see `^M` at the ends of my lines, but if I manually remove these in vim, it says my patch file is corrupted, and then the patch doesn&#39;t apply at all.

I create a patch with the following command:

`git diff &gt; patchname.patch` 

And I apply it by checking out a clean version of the file to be patched and typing

`git apply patchname.patch`

How can I create this patch without whitespace errors? I&#39;ve created patches before and never run into this issue.


My diff contains trailing whitespace - how to get rid of it?

In Firefox only my video thumbnails are displaying mysterious 2-3 pixels of white space between the bottom of my image and its border (see below).

I&#39;ve tried everything I can think of in Firebug with no luck.

How can I remove this white space?

![Screenshot displaying white space below image][2]


  [1]: http://bit.ly/nV6E2w
  [2]: http://i.stack.imgur.com/HtUlH.png

Remove white space below image

I want to eliminate all the whitespace from a string, on both ends, and in between words.

This only eliminates the whitespace on both sides of the string:

    &gt;&gt;&gt; &quot;  hello  apple  &quot;.strip()
    &#39;hello  apple&#39;

How do I remove all whitespace?

Remove all whitespace in a string

How can I remove all white space from the beginning and end of a string?

Like so:

`&quot;hello&quot;` returns `&quot;hello&quot;`  
`&quot;hello   &quot;` returns `&quot;hello&quot;`  
`&quot; hello   &quot;` returns `&quot;hello&quot;`  
`&quot; hello world   &quot;` returns `&quot;hello world&quot;`


How to remove all white space from the beginning or end of a string?

I am getting &#39;trailing whitespace&#39; errors trying to commit some files in Git.

I want to remove these trailing whitespace characters automatically right before I save Python files.

Can you configure Vim to do this? If so, how?


How can you automatically remove trailing whitespace in vim

I&#39;ve the following HTML string. What would be sample code in JavaScript to remove leading and trailing white spaces from this string?

    &lt;p&gt;&amp;nbsp;&amp;nbsp;&lt;/p&gt;
    &lt;div&gt;&amp;nbsp;&lt;/div&gt;
    Trimming using JavaScript&lt;br /&gt;
    &lt;br /&gt;
    &lt;br /&gt;
    &lt;br /&gt;
    all leading and trailing white spaces
    &lt;p&gt;&amp;nbsp;&amp;nbsp;&lt;/p&gt;
    &lt;div&gt;&amp;nbsp;&lt;/div&gt;

How to remove leading and trailing white spaces from a given html string?

I have a table with two fields (countries and ISO codes):

    Table1
    
       field1 - e.g. &#39;Afghanistan&#39; (without quotes)
       field2 - e.g. &#39;AF&#39;(without quotes)


In some rows the second field has whitespace at the start and/or end, which is affecting queries. 

    Table1
    
       field1 - e.g. &#39;Afghanistan&#39; (without quotes) 
       field2 - e.g. &#39; AF&#39; (without quotes but with that space in front)

Is there a way (in SQL) to go through the table and find/replace the whitespace in field2?


How to remove leading and trailing whitespace in a MySQL field?

I use `Sublime text`. Now I am trying `Atom`. When I save any file in sublime text it does not include any trailing blank line. But saving any file in `Atom` leaves a trailing blank line. How do I force `Atom` not to leave trailing white spaces?

Atom text editor remove trailing whitespace on save

There`s some extra space under textarea tag. From 1 to 4 pixels in different browsers. The markup is very simple:

    &lt;!DOCTYPE html PUBLIC &quot;-//W3C//DTD XHTML 1.0 Strict//EN&quot; &quot;http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd&quot;&gt;
    
    &lt;html&gt;
        &lt;head&gt;
            &lt;style&gt;
                body {
    	            margin: 0;
    	            padding: 0;
                }
                .main {
    	            background-color: red;
                }
                textarea {
    	            background-color: gray;
    	            resize: none;
    	            margin: 0;
    	            border: 0 none;
    	            padding: 10px;
    	            height: 50px;
    	            overflow: hidden;
                }
            &lt;/style&gt;
        &lt;/head&gt;
        &lt;body&gt;
            &lt;div class=&quot;main&quot;&gt;
                &lt;textarea&gt;&lt;/textarea&gt;
            &lt;/div&gt;
        &lt;/body&gt;
    &lt;/html&gt;


Here&#39;s how it is rendered in browsers:

![Screenshot][1]

Why is this happening? How to remove this extra space?


  [1]: http://i.stack.imgur.com/66R1y.jpg

Extra space under textarea, differs along browsers

I&#39;m calling a REST API and am receiving an XML response back. It returns a list of a workspace names, and I&#39;m writing a quick `IsExistingWorkspace()` method. Since all workspaces consist of contiguous characters with no whitespace, I&#39;m assuming the easiest way to find out if a particular workspace is in the list is to remove all whitespace (including newlines) and doing this (XML is the string received from the web request):

    XML.Contains(&quot;&lt;name&gt;&quot; + workspaceName + &quot;&lt;/name&gt;&quot;);

I know it&#39;s case-sensitive, and I&#39;m relying on that. I just need a way to remove all whitespace in a string efficiently. I know RegEx and LINQ can do it, but I&#39;m open to other ideas. I am mostly just concerned about speed.



Efficient way to remove ALL whitespace from String?

I have this string:

    mystring = &#39;Here is  some   text   I      wrote   &#39;

How can I substitute the double, triple (...) whitespace chracters with a single space, so that I get:

    mystring = &#39;Here is some text I wrote&#39;


Substitute multiple whitespace with single whitespace in Python

I typically use the following code in JavaScript to split a string by whitespace.

    &quot;The quick brown fox jumps over the lazy dog.&quot;.split(/\s+/);
    // [&quot;The&quot;, &quot;quick&quot;, &quot;brown&quot;, &quot;fox&quot;, &quot;jumps&quot;, &quot;over&quot;, &quot;the&quot;, &quot;lazy&quot;, &quot;dog.&quot;]

This of course works even when there are multiple whitespace characters between words.

    &quot;The  quick brown fox     jumps over the lazy   dog.&quot;.split(/\s+/);
    // [&quot;The&quot;, &quot;quick&quot;, &quot;brown&quot;, &quot;fox&quot;, &quot;jumps&quot;, &quot;over&quot;, &quot;the&quot;, &quot;lazy&quot;, &quot;dog.&quot;]

The problem is when I have a string that has leading or trailing whitespace in which case the resulting array of strings will include an empty character at the beginning and/or end of the array.

    &quot;  The quick brown fox jumps over the lazy dog. &quot;.split(/\s+/);
    // [&quot;&quot;, &quot;The&quot;, &quot;quick&quot;, &quot;brown&quot;, &quot;fox&quot;, &quot;jumps&quot;, &quot;over&quot;, &quot;the&quot;, &quot;lazy&quot;, &quot;dog.&quot;, &quot;&quot;]

It&#39;s a trivial task to eliminate such empty characters, but I&#39;d rather take care of this within the regular expression if that&#39;s at all possible. Does anybody know what regular expression I could use to accomplish this goal?

How do I split a string by whitespace and ignoring leading and trailing whitespace into an array of words using a regular expression?

I am having some trouble with leading and trailing white space in a data.frame.

For example, I look at a specific `row` in a `data.frame` based on a certain condition:

&lt;!-- Note: Trailing white space in this section (for the first three non-empty lines) --&gt; 

    &gt; myDummy[myDummy$country == c(&quot;Austria&quot;),c(1,2,3:7,19)] 



    [1] codeHelper     country        dummyLI    dummyLMI       dummyUMI       

    [6] dummyHInonOECD dummyHIOECD    dummyOECD      

    &lt;0 rows&gt; (or 0-length row.names)

I was wondering why I didn&#39;t get the expected output since the country Austria obviously existed in my `data.frame`. After looking through my code history and trying to figure out what went wrong I tried:

    &gt; myDummy[myDummy$country == c(&quot;Austria &quot;),c(1,2,3:7,19)]
       codeHelper  country dummyLI dummyLMI dummyUMI dummyHInonOECD dummyHIOECD
    18        AUT Austria        0        0        0              0           1
       dummyOECD
    18         1

All I have changed in the command is an additional white space after Austria.

Further annoying problems obviously arise. For example, when I like to merge two frames based on the country column. One `data.frame` uses `&quot;Austria &quot;` while the other frame has `&quot;Austria&quot;`. The matching doesn&#39;t work.

 1. Is there a nice way to &#39;show&#39; the white space on my screen so that I am aware of the problem?
 2. And can I remove the leading and trailing white space in R?

So far I used to write a simple [Perl][1] script which removes the whites pace, but it would be nice if I can somehow do it inside R.

  [1]: https://en.wikipedia.org/wiki/Perl





How can I trim leading and trailing white space?

Are there any tools / UNIX single liners which would remove trailing whitespaces for multiple files **in-place**.

E.g. one that could be used in the conjunction with *find*.

How to remove trailing whitespaces for multiple files?

How do you trim whitespace from the start and end of a string?

    trim &quot;  abc &quot; 

    =&gt;

    &quot;abc&quot;

Edit:

Ok, let me be a little clearer. I did not understand that string literals were treated so differently from Strings.

I would like to do this:

    import qualified Data.Text as T
    let s :: String = &quot;  abc  &quot;
    in T.strip s

Is this possible in Haskell? I am using -XOverloadedStrings but that appears only to work for literals.

In Haskell, how do you trim whitespace from the beginning and end of a string?

I&#39;m having a problem trying to ignore whitespace in-between certain characters. I&#39;ve been Googling around for a few days and can&#39;t seem to find the right solution.

Here&#39;s my code:

    // Get Image data
    preg_match(&#39;#&lt;a href=&quot;(.*?)&quot; title=&quot;(.*?)&quot;&gt;&lt;img alt=&quot;(.*?)&quot; src=&quot;(.*?)&quot;[\s*]width=&quot;150&quot;[\s*]height=&quot;(.*?)&quot;&gt;&lt;/a&gt;#&#39;, $data, $imagematch);
    $image = $imagematch[4];

Basically these are some of the scenarios I have:

     &lt;a href=&quot;/wiki/File:Sky1.png&quot; title=&quot;File:Sky1.png&quot;&gt;&lt;img alt=&quot;Sky1.png&quot; src=&quot;http://media-mcw.cursecdn.com/thumb/5/56/Sky1.png/150px-Sky1.png&quot;width=&quot;150&quot; height=&quot;84&quot;&gt;&lt;/a&gt;

(Notice the lack of a space between width=&quot;&quot; and src=&quot;&quot;)

And

    &lt;a href=&quot;/wiki/File:TallGrass.gif&quot; title=&quot;File:TallGrass.gif&quot;&gt;&lt;img alt=&quot;TallGrass.gif&quot; src=&quot;http://media-mcw.cursecdn.com/3/34/TallGrass.gif&quot; width=&quot;150&quot;height=&quot;150&quot;&gt;&lt;/a&gt;

(Notice the lack of a space in between width=&quot;&quot; and height=&quot;&quot;.)

Is there anyway to ignore the whitespace in between those characters? As I am not a Regex expert.


All Removing Whitespace Solutions on Gang of Coders

Total of 18 Removing Whitespace Solutions