Another option is

    if (myString?.trim()) {
      ...
    }

(using [Groovy Truth for Strings](https://groovy-lang.org/semantics.html#_strings))

You could add a method to String to make it more semantic:

    String.metaClass.getNotBlank = { !delegate.allWhitespace }

which let&#39;s you do:

    groovy:000&gt; foo = &#39;&#39;
    ===&gt; 
    groovy:000&gt; foo.notBlank
    ===&gt; false
    groovy:000&gt; foo = &#39;foo&#39;
    ===&gt; foo
    groovy:000&gt; foo.notBlank
    ===&gt; true


I find this method to be quick and versatile:

```groovy
static boolean isNullOrEmpty(String str) { return (str == null || str.allWhitespace) } 

// Then I often use it in this manner
DEF_LOG_PATH = &#39;/my/default/path&#39;
logPath = isNullOrEmpty(log_path) ? DEF_LOG_PATH : log_path
```

I am quite new to using groovy, though, so I am not sure if there exists a way to make it an actual extension method of the String type and this works well enough that I have not bothered to look.

Thanks,
-MH

It&#39;s works in my project with grails2.1: 

    String str = someObj.getSomeStr()?.trim() ?: &quot;Default value&quot;

If someObj.getSomeStr() is null or empty &quot;&quot; -&gt; str = &quot;Default value&quot;&lt;br&gt;
If someObj.getSomeStr() = &quot;someValue&quot; -&gt; str = &quot;someValue&quot;

I have very basic and known scenario of form where I need to align labels next to inputs correctly. However I don&#39;t know how to do it.

My goal would be that labels are aligned next to inputs to the right side. Here is picture example of desired result.

![enter image description here][1]


  [1]: http://i.stack.imgur.com/0vfJu.png

I have made a fiddle for your convenience and to clarify what I have now - http://jsfiddle.net/WX58z/

Snippet:

&lt;!-- begin snippet: js hide: false --&gt;

&lt;!-- language: lang-html --&gt;

    &lt;div class=&quot;block&quot;&gt;
        &lt;label&gt;Simple label&lt;/label&gt;
        &lt;input type=&quot;text&quot; /&gt;
    &lt;/div&gt;
    &lt;div class=&quot;block&quot;&gt;
        &lt;label&gt;Label with more text&lt;/label&gt;
        &lt;input type=&quot;text&quot; /&gt;
    &lt;/div&gt;
    &lt;div class=&quot;block&quot;&gt;
        &lt;label&gt;Short&lt;/label&gt;
        &lt;input type=&quot;text&quot; /&gt;
    &lt;/div&gt;

&lt;!-- end snippet --&gt;



Align labels in form next to input

I can&#39;t get the `.delay` method working in jQuery:

    $.delay(3000); // not working
    $(queue).delay(3000); // not working

I&#39;m using a while loop to wait until an uncontrolled changing value is greater than or equal to another and I can&#39;t find any way to hault execution for X seconds.

jQuery: Wait/Delay 1 second without executing code

Groovy adds the `isAllWhitespace()` method to Strings, which is great, but there doesn&#39;t seem to be a _good_ way of determining if a String has something other than _just_ white space in it.

The best I&#39;ve been able to come up with is:

    myString &amp;&amp; !myString.allWhitespace

But that seems too verbose. This seems like such a common thing for validation that there _must_ be a simpler way to determine this.

How can I determine if a String is non-null and not only whitespace in Groovy?

Groovy adds the <code>isAllWhitespace()</code> method to Strings, which is great, but there doesn't seem to be a good way of determining if a String has something other than just white space in it.
The best I've been able to come up with is:
<pre><code class="hljs language-yaml">myString &#x26;&#x26; !myString.allWhitespace
</code></pre>
But that seems too verbose. This seems like such a common thing for validation that there must be a simpler way to determine this.

I try to do a simple string replacement, but I don&#39;t know why it doesn&#39;t seem to work:

&lt;!-- language: lang-python --&gt;

    X = &quot;hello world&quot;
    X.replace(&quot;hello&quot;, &quot;goodbye&quot;)

I want to change the word `hello` to `goodbye`, thus it should change the string `&quot;hello world&quot;` to `&quot;goodbye world&quot;`. But X just remains `&quot;hello world&quot;`. Why is my code not working?

Why doesn&#39;t calling a string method do anything unless its output is assigned?

How do I write a function to split and return an array for a string with delimiters in the C programming language?

    char* str = &quot;JAN,FEB,MAR,APR,MAY,JUN,JUL,AUG,SEP,OCT,NOV,DEC&quot;;
    str_split(str,&#39;,&#39;);


Split string with delimiters in C

In the `val`[docs][1] written  this description:

&gt; .val() Returns: String, Number, Array

I tried to get a `Number`, but it seems to return `string` only, Is there something that I&#39;m doing wrong?

&lt;!-- begin snippet: js hide: false console: true babel: false --&gt;

&lt;!-- language: lang-js --&gt;

    $(&#39;#gdoron&#39;).val(&#39;1&#39;);

    alert($(&#39;#gdoron&#39;).val() === &#39;1&#39;); // true 
    alert(typeof $(&#39;#gdoron&#39;).val());  // string.

    $(&#39;#gdoron&#39;).val(1);

    alert($(&#39;#gdoron&#39;).val() === 1);  // false
    alert(typeof $(&#39;#gdoron&#39;).val()); // string (not &quot;number&quot;!)

&lt;!-- language: lang-html --&gt;

    &lt;script src=&quot;https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js&quot;&gt;&lt;/script&gt;
    &lt;input type=&quot;text&quot; id=&quot;gdoron&quot; /&gt;

&lt;!-- end snippet --&gt;

My question is: **how can `val()` return number as the docs says?** The question is not about how can I parse the string.

​    

  [1]: http://api.jquery.com/val/

How can val() return Number?

I have problem in changing a string into uppercase with Python. In my research, I got `string.ascii_uppercase` but it doesn&#39;t work.

The following code:

     &gt;&gt;s = &#39;sdsd&#39;
     &gt;&gt;s.ascii_uppercase

Gives this error message:

    Traceback (most recent call last):
      File &quot;&lt;console&gt;&quot;, line 1, in &lt;module&gt;
    AttributeError: &#39;str&#39; object has no attribute &#39;ascii_uppercase&#39;

My question is: **how can I convert a string into uppercase in Python?**


How to change a string into uppercase

How come this code

	std::map &lt;std::string , int&gt; m;
    m[&quot;a&quot;]=1;



 compiles with (I&#39;m using MSVC 2010)

    #include &lt;string&gt;
but not with

    #include &lt;string.h&gt;
?


Difference between &lt;string&gt; and &lt;string.h&gt;?

Is it possible to create object without declaring class? Like in JavaScript 
`obj = {a: &#39;1&#39;}; console.log(obj.a)`


Is it possible to create object without declaring class?

With all the shorthand ways of doing things in Groovy, there&#39;s got to be an easier way to iterate a list while having access to an iteration index.

    for(i in 0 .. list.size()-1) {
       println list.get(i)
    }

Is there no implicit index in a basic `for` loop?

    for( item in list){
        println item       
        println index
    }

Groovy, how to iterate a list with an index

According to the [Groovy docs][1], the `==` is just a &quot;clever&quot; `equals()` as it also takes care of avoiding `NullPointerException`:

&gt; Java’s `==` is actually Groovy’s `is()` method, and Groovy’s `==` is a clever `equals()`!
&gt; 
&gt; [...]
&gt; 
&gt; But to do the usual `equals()` comparison, you should prefer Groovy’s `==`, as it also takes care of avoiding `NullPointerException`, independently of whether the left or right is `null` or not.

So, the `==` and `equals()` should return the same value if the objects are not null. However, I&#39;m getting unexpected results on executing the following script:

```lang-groovy
println &quot;${&#39;test&#39;}&quot; == &#39;test&#39;
println &quot;${&#39;test&#39;}&quot;.equals(&#39;test&#39;)
```

The output that I&#39;m getting is:

```lang-none
true
false
```

Is this a known bug related to `GStringImpl` or something that I&#39;m missing?


  [1]: http://groovy-lang.org/style-guide.html#_equals_and_code_code

Groovy different results on using equals() and == on a GStringImpl

I have a very simple task I am trying to do in Groovy but cannot seem to get it to work. I am just trying to loop through a map object in groovy and print out the key and value but this code does not work.


    // A simple map
    def map = [
            iPhone : &#39;iWebOS&#39;,
            Android: &#39;2.3.3&#39;,
            Nokia  : &#39;Symbian&#39;,
            Windows: &#39;WM8&#39;
    ]

    // Print the values
    for (s in map) {
        println s + &quot;: &quot; + map[s]
    }

I am trying to get the output to look like this:

    iPhone: iWebOS
    Android: 2.3.3
    Nokia: Symbian
    Windows: WM8

Could someone please elaborate on how to do this??

Loop through Map in Groovy?

Is there a kind of URLEncode in Groovy?

I can&#39;t find any String → String URL encoding utility.

Example: `dehydrogenase (NADP+)` → `dehydrogenase%20(NADP%2b)`

&lt;i&gt;(`+` instead of `%20` would also be acceptable, as [some][1] implementations do that)&lt;/i&gt;


  [1]: http://www.opinionatedgeek.com/dotnet/tools/urlencode/Encode.aspx

How to encode URL in Groovy?

I have an MVC3 app that has a details page. As part of that I have a description (retrieved from a db) that has spaces and new lines. When it is rendered the new lines and spaces are ignored by the html. I would like to encode those spaces and new lines so that they aren&#39;t ignored.

How do you do that?

I tried HTML.Encode but it ended up displaying the encoding (and not even on the spaces and new lines but on some other special characters)

Render a string in HTML and preserve spaces and linebreaks

I want to remove trailing white spaces and tabs from my code without 
removing empty lines.

I tried:

    \s+$

and:

    ([^\n]*)\s+\r\n

But they all removed empty lines too. I guess `\s` matches end-of-line characters too.

----------

*UPDATE (2016):&lt;br&gt;*

*Nowadays I automate such code cleaning by using Sublime&#39;s [TrailingSpaces][1] package, with custom/user setting:*

    &quot;trailing_spaces_trim_on_save&quot;: true
*It highlights trailing white spaces and automatically trims them on save.*


  [1]: https://github.com/SublimeText/TrailingSpaces &quot;TrailingSpaces&quot;

How do I remove trailing whitespace using a regular expression?

Is there any way to emulate the display of a `pre` element via CSS?

For example, can I keep the whitespace intact in this div by using a CSS rule?

    &lt;div class=&quot;preformatted&quot;&gt;

      Please procure the following items:

        - Soup
        - Jam
        - Hyphens 
        - Cantaloupe
    &lt;/div&gt;

Display element as preformatted text via CSS

I&#39;ve got a problem, where a large commit which changes about a thousand lines of code, removing whitespace from the end of lines and removing spaces before tabs.

There are also about 50 pull requests for this project, in which all will get conflicts, when my commit is merged. Is there any way that git can be set up so that when merging future commits, it ignores conflicts where one of them is just a whitespace change?

Modifying git itself or using a third party tool isn&#39;t possible, but using a hook is fine.


Merging without whitespace conflicts

I just lost part of my weekend because of this ... joker - zero width space. I just used some snippets from google groups and didn&#39;t recognize that there are doubled characters, because Idea (11) didn&#39;t show them, which was causing problems with parsing config file of my app... I discovered it accidentally in vi.

Is there any way to display such things in IntelliJ (or some other way to examine files) without using external editors.

IntelliJ 11 / Mac OS 10.7

**edit - sample**

These two lines looks identical, in browser and also in Idea. You can see in page&#39;s code that in first - commented line there is hidden zero width space between `mysql://` and `localhost`, which causes problems. Of course if you expect that &#39;joker&#39;, you can try to use search and replace it, however nobody expects the sign that should not be there, especially if he cannot see it in any way. 

    #db.default.url=&quot;jdbc:mysql://​localhost/play-fullcalendar&quot;
     db.default.url=&quot;jdbc:mysql://localhost/play-fullcalendar&quot;

Content Type	Original Author	Original Content on Stackoverflow
Question	cdeszaq	View Question on Stackoverflow
Solution 1 - String	tim_yates	View Answer on Stackoverflow
Solution 2 - String	doelleri	View Answer on Stackoverflow
Solution 3 - String	MostHated	View Answer on Stackoverflow
Solution 4 - String	in_trance	View Answer on Stackoverflow

How can I determine if a String is non-null and not only whitespace in Groovy?

String Problem Overview

String Solutions

Solution 1 - String

Solution 2 - String

Solution 3 - String

Solution 4 - String

jQuery: Wait/Delay 1 second without executing code

Align labels in form next to input

Attributions