as simple as:

    tmpHM.each{ key, value -&gt; 
      doSomethingWithKeyAndValue key, value
    }

This one worked for me:

    def list = [1,2,3,4]
    for(item in list){
        println item
    }

Source: [Wikia](http://code.wikia.com/wiki/Groovy).

You can use the below groovy code for maps with for-each loop.

```groovy
def map=[key1:&#39;value1&#39;, key2:&#39;value2&#39;]

for (item in map) {
  log.info item.value // this will print value1 value2
  log.info item       // this will print key1=value1 key2=value2
}
```

Your code works fine.  

    def list = [[&quot;c&quot;:&quot;d&quot;], [&quot;e&quot;:&quot;f&quot;], [&quot;g&quot;:&quot;h&quot;]]
    Map tmpHM = [1:&quot;second (e:f)&quot;, 0:&quot;first (c:d)&quot;, 2:&quot;third (g:h)&quot;]

    for (objKey in tmpHM.keySet()) {   
        HashMap objHM = (HashMap) list.get(objKey);
        print(&quot;objHM: ${objHM}  , &quot;)
    }

prints `objHM: [e:f]  , objHM: [c:d]  , objHM: [g:h]  ,`

See https://groovyconsole.appspot.com/script/5135817529884672

Then click &quot;edit in console&quot;, &quot;execute script&quot;

I want to apply `filter` on an iterator and I came up with this one and it works, but it&#39;s super verbose:

    .filter(|ref my_struct| match my_struct.my_enum { Unknown =&gt; false, _ =&gt; true })
    
I would rather write something like this:

    .filter(|ref my_struct| my_struct.my_enum != Unknown)

This gives me a compile error

&lt;!-- language: none --&gt;

    binary operation `!=` cannot be applied to type `MyEnum`

Is there an alternative to the verbose pattern matching? I looked for a macro but couldn&#39;t find a suitable one.

How to compare enum without pattern matching

I was wondering how to set the radius/blur factor of iOS new `UIBlurEffectStyle.Light`? I could not find anything in the documentation. But I want it to look similar to the classic `UIImage+ImageEffects.h` blur effect.

    required init(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        
        let blur = UIBlurEffect(style: UIBlurEffectStyle.Light)
        let effectView = UIVisualEffectView(effect: blur)
        effectView.frame = frame
        addSubview(effectView)
    }



How to set the BlurRadius of UIBlurEffectStyle.Light

How to implement *foreach* in Groovy?
I have an example of code in Java, but I don&#39;t know how to implement this code in Groovy...

Java:

    for (Object objKey : tmpHM.keySet()) {
       HashMap objHM = (HashMap) list.get(objKey);
    }


I read http://groovy.codehaus.org/Looping, and tried to translate my Java code to Groovy, but it&#39;s not working.

    for (objKey in tmpHM.keySet()) {
       HashMap objHM = (HashMap) list.get(objKey);
    }

for each loop in groovy

How to implement foreach in Groovy?
I have an example of code in Java, but I don't know how to implement this code in Groovy...
Java:
<pre><code class="hljs language-css">for (Object objKey : tmpHM.keySet()) {
 HashMap objHM = (HashMap) list.get(objKey);
}
</code></pre>
I read <a href="http://groovy.codehaus.org/Looping" target="_blank" rel="noopener noreferrer">http://groovy.codehaus.org/Looping</a>, and tried to translate my Java code to Groovy, but it's not working.
<pre><code class="hljs language-ini">for (objKey in tmpHM.keySet()) {
 HashMap objHM = (HashMap) list.get(objKey);
}
</code></pre>

Spring-Boot is a pretty awesome tool, but the documentation is a bit sparse when it comes to more advanced configuration. How can I set properties like the maximum size for my database connection pool?

Spring-Boot supports `tomcat-jdbc`, `HikariCP` and `Commons DBCP` natively are they all configured the same way?

Spring-Boot: How do I set JDBC pool properties like maximum number of connections?

All I have been reading lots of blogs on this subject but still I could not get clear idea when to use one over another hashset or tree set.

Taken an example:

 1. I have a comparable objects. I have put them in HashSet. Now when (**only when I want**) i want to set to be sorted based on compareTo logic, I can call Collections.sort(object)

 2. whereas Treeset by default always use the compareTo or compare(obj1, obj2) **all the time**. Hence performance will be hit with TreeSet but output will be same as #1 (Collections.sort).

Is this understanding correct?

Java: Hashset Vs TreeSet - when should I use over the other?

I just installed the latest Java SDK 7-67 from Oracle on the Mac 10.9.4. I then ran the command `java -v` in Terminal and I get this message:

&gt; Error: Could not create the Java Virtual Machine.  
&gt; Error: A fatal exception has occurred. Program will exit.

Error: Could not create the Java Virtual Machine Mac OSX Mavericks

So I would expect this code to work under the new Java 8 date/time package since all it does is to convert a given ZonedDateTime to string and back using the same built-in DateTimeFormatter instance (ISO_INSTANT):

    ZonedDateTime now = ZonedDateTime.now();
    System.out.println(ZonedDateTime.parse(
        now.format(DateTimeFormatter.ISO_INSTANT),
		DateTimeFormatter.ISO_INSTANT));

But apparently  it doesn&#39;t:

    Exception in thread &quot;main&quot; java.time.format.DateTimeParseException: Text &#39;2014-09-01T19:37:48.549Z&#39; could not be parsed: Unable to obtain ZonedDateTime from TemporalAccessor: {MilliOfSecond=549, NanoOfSecond=549000000, MicroOfSecond=549000, InstantSeconds=1409600268},ISO of type java.time.format.Parsed
    	at java.time.format.DateTimeFormatter.createError(DateTimeFormatter.java:1918)
    	at java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1853)
    	at java.time.ZonedDateTime.parse(ZonedDateTime.java:597)

I have seen this entry already, but it didn&#39;t help me because a need a ZonedDateTime object and not a local one and also because I already have 8u20 installed: https://stackoverflow.com/questions/23596530/unable-to-obtain-zoneddatetime-from-temporalaccessor-using-datetimeformatter-and

Anyone have any idea what&#39;s happening here?

Java 8 - DateTimeFormatter and ISO_INSTANT issues with ZonedDateTime

I have a question regarding how singleton beans serve concurrent requests in detail.

I have searched on StackOverflow regarding this question. This is a sample [link from stackoverflow](https://stackoverflow.com/questions/13776728/how-does-spring-bean-handle-concurrency), but I found only high level details. I want full details on how a singleton bean serves concurrent requests and how the system processor will see those requests.

I have researched regarding concurrent request handling in the system processor online. They said the processor itself has a scheduler and that scheduler will decide which request gets processed.

Ok fine. If suppose I have more than one core processor, how does the scheduler handle concurrent requests?

Can anyone explain to me the step-by-step process on how a singleton bean will serve concurrent requests in the JVM and system?

Let me explain with a concrete example. I have a class like `Sports`:

    class Sports {
        public void playFootball() {
        }

        public void playVolleyBall() {
        }
    }

Two requests come in. The first request is executing the `playFootball` method on the created singleton instance of class `Sports`. At the same time, another request is executing the `playVolleyBall` method on the same created singleton instance of class `Sports`.

How is it possible with a singleton instance?

How does the singleton Bean serve the concurrent request?

I heard that Groovy has a built-in REST/HTTP client. The only library I can find is [HttpBuilder](https://github.com/jgritman/httpbuilder), **is this it?**

Basically I&#39;m looking for a way to do HTTP GETs from inside Groovy code without having to import any libraries (if at all possible). But since this module doesn&#39;t appear to be a part of core Groovy I&#39;m not sure if I have the right lib here.

Groovy built-in REST/HTTP client?

Let&#39;s say I&#39;ve got a list, like this...

    def myList = [&quot;first&quot;, 2, &quot;third&quot;, 4.0];

How do I add (push) an element to the end of it? I come from a PHP background, and there I would just do something like `$myList[] = &quot;fifth&quot;;`. What&#39;s the equivalent of that in Groovy?

How do I add an element to a list in Groovy?

I am new to Gradle and Groovy and trying to understand what is happening at the level of groovy when a gradle task is defined. 

    task hello  { 
       println &quot;configuring task hello&quot; 
       doLast {
         println &quot;hello there&quot; 
       }
    }

From reading the &quot;Gradle In Action&quot; book I know that the `task hello {}` is a really a call to the `task()` method of the groovy `Project` interface. On page 77 it shows that there are 4 methods called task on the `Project` interface

    task(args: Map&lt;String,?&gt;, name:String)
    task(args: Map&lt;String,?&gt;, name:String, c:Closure)
    task(name: String)
    task(name: String, c:Closure)


I understand that the `{}` is the closure body. 

What I don&#39;t understand is how does groovy interpret `hello` in `task hello { }` according to https://stackoverflow.com/a/25592665/438319 there is a groovy compiler plugin that converts `task hello { }` into `task(&#39;hello&#39;, { })`

My Questions: 

 - Where can I find information about the Gradle Groovy Compiler plugin that does the conversion?
 
 - Is the claim that Gradle scripts are groovy programs technically incorrect since gradle somehow extends the Groovy programming language?

 - Is there a way to get the `gradle` command to print out the base groovy code that is generated after the compiler plugin has run?

Understanding the groovy syntax in a gradle task definition

As part of my project, I need to read files from a directory and do some operations all these in build script. For each file, the operation is the same(reading some SQL queries and execute it). I think its a repetitive task and better to write inside a method. Since I&#39;m new to Gradle, I don&#39;t know how it should be. Please help.


How to define and call custom methods in build.gradle?

How do you access `parameters` set in the &quot;This build is parameterized&quot; section of a &quot;Workflow&quot; Jenkins job?

**TEST CASE** 

1. Create a WORKFLOW job.
2. Enable &quot;This build is parameterized&quot;.
3. Add a STRING PARAMETER `foo` with default value `bar text`.
4. Add the code below to `Workflow Script`:

        node()
        {
             print &quot;DEBUG: parameter foo = ${env.foo}&quot;
        }
5. Run job.

**RESULT**

`DEBUG: parameter foo = null`

How to access parameters in a Parameterized Build?

I&#39;m using Google Chrome&#39;s Console window to try and figure out why I&#39;m not able to loop over an array in javascript.

I have a javascript object called `moveResult` that looks like this:  

![enter image description here][1]

I&#39;m trying to loop over the `MoveParts` in javascript like this:

    for (var movePart in moveResult.MoveParts) {
        console.log(movePart.From);
    };

I always get `undefined` instead of the actual value.  However, If I try to access the first item explicitly I get what I want, like this:

    console.log(moveResult.MoveParts[0].From);

The result of this is `&quot;b1&quot;`.

**Why isn&#39;t my loop working?**

I&#39;ve also tried a foreach:

    moveResult.MoveParts.foreach(function (movePart) {
        console.log(movePart.From);
    };

  [1]: http://i.stack.imgur.com/VxCKD.jpg

Loop Over Array in Javascript

In the following object, I have a problem using the &#39;this&#39; reference:

    function SampleObject(){
        this.addObject = function(object){...}
        ...
        // more code here
        ...
        this.addNewObjects= function(arr){
            arr.forEach( function (obj) {
                this.addObject(new Obj(obj.prop1, obj.prop2));
            });
        }
    }
I&#39;m assuming the context is changing and that &#39;this&#39; refers the iterated &#39;obj&#39;, and not &#39;SampleObject&#39;. I&#39;ve solved the problem using a normal for loop however, i&#39;m curuois to why this is not working, and would like to know if there is another way to do this.

How to function call using &#39;this&#39; inside forEach loop

I was going through the `forEach` `loop` in `AngularJS`. There are few points that I did not understood about it.

1. What is the use of the iterator function? Is there any way to go without it?
2. What is the significance of the key and value as shown below?

`angular.forEach($scope.data, function(value, key){});`

**PS:** I tried to run this function without the arguments and it did not work.

Here&#39;s my `json`:

    [
       {
         &quot;Name&quot;: &quot;Thomas&quot;,
         &quot;Password&quot;: &quot;thomasTheKing&quot;
       },
       {
         &quot;Name&quot;: &quot;Linda&quot;,
         &quot;Password&quot;: &quot;lindatheQueen&quot;
       }
    ]

My `JavaScript` file: 

    var app = angular.module(&#39;testModule&#39;, []);

    app.controller(&#39;testController&#39;, function($scope, $http){
       $http.get(&#39;Data/info.json&#39;).then(
          function(data){
             $scope.data = data;
          }
       );

       angular.forEach($scope.data, function(value, key){
          if(value.Password == &quot;thomasTheKing&quot;)
             console.log(&quot;username is thomas&quot;);
       });
    });

**Another question**: Why the function above does not enter on if condition and print &quot;username is thomas&quot; in the console?

foreach loop in angularjs

This is probably something really dumb, but I don&#39;t understand why this doesn&#39;t work.

    var a = {&quot;cat&quot;:&quot;large&quot;};

    a.forEach(function(value, key, map){
        console.log(value);
    });

**Uncaught TypeError: a.forEach is not a function**

http://jsfiddle.net/ty7z6pse/

Why is &quot;forEach not a function&quot; for this object?

How do I go to the next iteration of a JavaScript `Array.forEach()` loop?

For example:

    var myArr = [1, 2, 3, 4];
    
    myArr.forEach(function(elem){
      if (elem === 3) {
        // Go to &quot;next&quot; iteration. Or &quot;continue&quot; to next iteration...
      }
      
      console.log(elem);
    });

[MDN docs][1] only mention breaking out of the loop entirely, not moving to next iteration.


  [1]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach

Content Type	Original Author	Original Content on Stackoverflow
Question	Adrian Adendrata	View Question on Stackoverflow
Solution 1 - Java	injecteer	View Answer on Stackoverflow
Solution 2 - Java	HumanInDisguise	View Answer on Stackoverflow
Solution 3 - Java	Gaurav Khurana	View Answer on Stackoverflow
Solution 4 - Java	cowlinator	View Answer on Stackoverflow

for each loop in groovy

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How to set the BlurRadius of UIBlurEffectStyle.Light

How to compare enum without pattern matching

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