Using [`equals()`](http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#equals-java.lang.Object-) 
`LocalDate` does override equals:

    int compareTo0(LocalDate otherDate) {
        int cmp = (year - otherDate.year);
        if (cmp == 0) {
            cmp = (month - otherDate.month);
            if (cmp == 0) {
                cmp = (day - otherDate.day);
            }
        }
        return cmp;
    }



If you are not happy with the result of `equals()`, you are good using the predefined methods of `LocalDate`.

 - [`isAfter()`](http://docs.oracle.com/javase/8/docs/api/java/time/LocalDate.html#isAfter-java.time.chrono.ChronoLocalDate-)
 - [`isBefore()`](http://docs.oracle.com/javase/8/docs/api/java/time/LocalDate.html#isBefore-java.time.chrono.ChronoLocalDate-)
 - [`isEqual()`](http://docs.oracle.com/javase/8/docs/api/java/time/LocalDate.html#isEqual-java.time.chrono.ChronoLocalDate-) 

Notice that all of those method are using the `compareTo0()` method and just check the `cmp` value. if you are still getting weird result (which you shouldn&#39;t), please attach an example of input and output

    LocalDate ld ....;
    LocalDateTime ldtime ...;
    
    ld.isEqual(LocalDate.from(ldtime));

  I believe this snippet will also be helpful in a situation where the dates comparison spans more than two entries.

    static final int COMPARE_EARLIEST = 0;

    static final int COMPARE_MOST_RECENT = 1;

  
    public LocalDate getTargetDate(List&lt;LocalDate&gt; datesList, int comparatorType) { 
	   LocalDate refDate = null;
	   switch(comparatorType)
	   {
		   case COMPARE_EARLIEST:         
           //returns the most earliest of the date entries
		      refDate = (LocalDate) datesList.stream().min(Comparator.comparing(item -&gt; 
                		  item.toDateTimeAtCurrentTime())).get();
		      break;

		   case COMPARE_MOST_RECENT:
              //returns the most recent of the date entries 
		      refDate = (LocalDate) datesList.stream().max(Comparator.comparing(item -&gt; 
                		item.toDateTimeAtCurrentTime())).get();
		      break;
	   }

	   return refDate;
    }



I&#39;m working on a project with this [template][1].

The template is written using AngularJs and Bootstrap-UI (bootstrap for angular) and I would like to include some Material Design elements like cards and others.

Is it possible to do that? is it recommended? 
My thing is we already love this template and way to many elements of it, but Material Design have cards, dropdown, text inputs with the label animation etc for example which are amazing.

So my question is: 

AngularJS + Bootstrap for Angular + Material Design for Angular = Awesomeness or Disaster?


  [1]: http://themeforest.net/item/angulr-bootstrap-admin-web-app-with-angularjs/8437259

Using Bootstrap for Angular and Material design for Angular together

I&#39;m trying to get into Grunt, which I am new to, but I do not understand its utility.

I understand that it is a taskrunner. I understand that it can be used to do things like bundle, uglify, jshint, minify, etc etc etc, anything that can be turned into a scripted task.

But I don&#39;t see what advantage this gives. Nearly all of these can be run from the command line anyway, which is to say you could just combine them using a simple shell script. It seems to me that setting up grunt + gruntfiles and writing tasks is *more* work than writing a shell script, rather than less.

What am I missing about this?

What is Grunt for?

I am writing an app that needs to be quite accurate in dates and I wonder how can I compare LocalDate instances.. for now I was using something like:

    LocalDate localdate1 = LocalDate().now();
    LocalDate localdate2 = someService.getSomeDate();
    localdate1.equals(localdate2);

But I noticed that my app is giving me some confusing results, and I think it is because of the date comparing.

I am thinking about obtaining the time from 1970&#39; in long and compare those two, but I must be easier, I am sure of it


How to compare LocalDate instances Java 8

I am writing an app that needs to be quite accurate in dates and I wonder how can I compare LocalDate instances.. for now I was using something like:
<pre><code class="hljs language-ini">LocalDate localdate1 = LocalDate().now();
LocalDate localdate2 = someService.getSomeDate();
localdate1.equals(localdate2);
</code></pre>
But I noticed that my app is giving me some confusing results, and I think it is because of the date comparing.
I am thinking about obtaining the time from 1970' in long and compare those two, but I must be easier, I am sure of it

I use the Moment.js and Moment-Timezone frameworks, and have a Moment.js date object which is explicitly in UTC timezone. How can I convert that to the current timezone of the browser?

    var testDateUtc = moment.tz(&quot;2015-01-30 10:00:00&quot;, &quot;UTC&quot;);
    var localDate = ???


So it would be fine if I could find out the users local time zone; or alternatively I&#39;d like to convert the date object into another data object which just uses the &quot;local timezone&quot;, no matter what that actually is.

How to convert Moment.js date to users local timezone?

I am getting from my server a string date in UTC time zone and I need to convert it to the local time zone.

MY CODE:


    let utcTime = &quot;2015-04-01T11:42:00.269Z&quot;    
    let dateFormatter = NSDateFormatter()
    dateFormatter.timeZone = NSTimeZone(name: &quot;UTC&quot;)
    dateFormatter.dateFormat = &quot;yyyy-MM-dd&#39;T&#39;HH:mm:ss.SSS&#39;Z&#39;&quot;
    let date = dateFormatter.dateFromString(utcTime)
    println(&quot;utc: \(utcTime), date: \(date)&quot;)

this prints - 

utc: 2015-04-01T11:42:00.269Z, date: Optional(2015-04-01 11:42:00 +0000)


if I remove 

    dateFormatter.timeZone = NSTimeZone(name: &quot;UTC&quot;) 

it prints 

utc: 2015-04-01T11:42:00.269Z, date: Optional(2015-04-01 08:42:00 +0000)

my local time zone is UTC +3 
and in the first option I get UTC
in the second option I get UTC -3

I should get

utc: 2015-04-01T11:42:00.269Z, date: Optional(2015-04-01 14:42:00 +0000)

So how do I convert the UTC date format to local time?


Converting UTC date format to local nsdate

I am new to Swift and am trying a scheduler. I have the start time selected and I need to add 5 minutes (or multiples of it) to the start time and display it in an `UILabel`?


    @IBAction func timePickerClicked(sender: UIDatePicker) {
        var dateFormatter = NSDateFormatter()
        dateFormatter.timeStyle = NSDateFormatterStyle.ShortStyle
        var dateStr = dateFormatter.stringFromDate(startTime.date)
        let sttime = dateStr
        startTimeDisplay.text = dateStr
    }
    
    // How to advance time by 5 minutes for each section based on the   start time selected and display time 
    // section 1 = start time + 5
    // section 2 = start time + 10*

How to add minutes to current time in swift

I would like a variable to hold yesterday&#39;s date in the format `DD-MM-YYYY` using Moment.js. So if today is 15-04-2015, I would like to subtract a day and have 14-4-2015.

I&#39;ve tried a few combinations like this:

    startdate = moment().format(&#39;DD-MM-YYYY&#39;);
    startdate.subtract(1, &#39;d&#39;);
 
and this:

    startdate = moment().format(&#39;DD-MM-YYYY&#39;).subtract(1, &#39;d&#39;);

and also this:

    startdate = moment();
    startdate.subtract(1, &#39;d&#39;);
    startdate.format(&#39;DD-MM-YYYY&#39;)

But I&#39;m not getting it...

Format date and Subtract days using Moment.js

How can I convert `Gregorian date` to `Persian date` and vice-versa in `Python`?

[All I found][1] was some widgets and stuffs which will create Persian Calendar. I don&#39;t want a Persian calendar. I just want to convert dates to each other.
So how can I do that?


  [1]: https://github.com/behzadi/persianDatepicker

Convert Gregorian (Christian) date to Persian date and vice-versa in Python

I want to compare values from two different files.  
In Notepad++ version 5.0.3 we had shortcut button &lt;kbd&gt;Alt&lt;/kbd&gt;+&lt;kbd&gt;d&lt;/kbd&gt; but in version 6.6.8 I cannot find any option to compare.

Also let me know which version is most stable.

How to compare two files in Notepad++

Is there an easy way to compare two `[String: AnyObject]` dictionaries in swift, since it doesn&#39;t accept the `==` operator? 

By comparing two dictionaries, I mean checking that they have the same exact keys and for every key they have the same values.

How do I compare two dictionaries in Swift?

As you know, [`java.util.Objects`][1] is 

&gt; This class consists of static utility methods for operating on objects.

One of such methods is `Objects.isNull()`.

My understanding is that `Objects.isNull()` would remove the chance of accidentally assigning a null value to object by omitting the second `=`.

However, the API Note states:

&gt; This method exists to be used as a Predicate, filter(Objects::isNull)

Would there be any reason/circumstance for which I should use `object == null` over `Objects.isNull()` in an **if statement**?

Should `Objects.isNull()` be confined to Predicates exclusively?

  [1]: https://docs.oracle.com/javase/8/docs/api/java/util/Objects.html

java.util.Objects.isNull vs object == null

I have an error value which when printed on console gives me `Token is expired`

How can I compare it with a specific error value? I tried this but it did not work:

    if err == errors.New(&quot;Token is expired&quot;) {
          log.Printf(&quot;Unauthorised: %s\n&quot;, err)
    }

How to compare Go errors

Since Python 3.4, the `Enum` class exists.

I am writing a program, where some constants have a specific order and I wonder which way is the most pythonic to compare them:

    class Information(Enum):
        ValueOnly = 0
        FirstDerivative = 1
        SecondDerivative = 2

Now there is a method, which needs to compare a given `information` of `Information` with the different enums:

    information = Information.FirstDerivative
    print(value)
    if information &gt;= Information.FirstDerivative:
        print(jacobian)
    if information &gt;= Information.SecondDerivative:
        print(hessian)

The direct comparison does not work with Enums, so there are three approaches and I wonder which one is preferred:

Approach 1: Use values:

    if information.value &gt;= Information.FirstDerivative.value:
         ...

Approach 2: Use IntEnum:

    class Information(IntEnum):
        ...

Approach 3: Not using Enums at all:

    class Information:
        ValueOnly = 0
        FirstDerivative = 1
        SecondDerivative = 2

Each approach works, Approach 1 is a bit more verbose, while Approach 2 uses the not recommended IntEnum-class, while  and Approach 3 seems to be the way one did this before Enum was added. 

I tend to use Approach 1, but I am not sure. 

Thanks for any advise!

How to compare Enums in Python?

I want to process lists inside an `XML` java object. I have to ensure processing all elements in order I received them.

Should I therefore call `sequential` on each `stream` I use?
`list.stream().sequential().filter().forEach()`

Or it it sufficient to just use the stream as long as I don&#39;t use parallelism?
`list.stream().filter().forEach()`

How to ensure order of processing in java8 streams?

I have the following sample code:

    System.out.println(
           &quot;Result: &quot; +
            Stream.of(1, 2, 3)
                    .filter(i -&gt; {
                        System.out.println(i);
                        return true;
                    })
                    .findFirst()
                    .get()
    );
    System.out.println(&quot;-----------&quot;);
    System.out.println(
           &quot;Result: &quot; +
            Stream.of(1, 2, 3)
                    .flatMap(i -&gt; Stream.of(i - 1, i, i + 1))
                    .flatMap(i -&gt; Stream.of(i - 1, i, i + 1))
                    .filter(i -&gt; {
                        System.out.println(i);
                        return true;
                    })
                    .findFirst()
                    .get()
    );

The output is as follows:

    1
    Result: 1
    -----------
    -1
    0
    1
    0
    1
    2
    1
    2
    3
    Result: -1

From here I see that in first case `stream` really behaves lazily - we use `findFirst()` so once we have first element our filtering lambda is not invoked.
However, in second case which uses `flatMap`s we see that despite first element which fulfils the filter condition is found (it&#39;s just any first element as lambda always returns true) further contents of the stream are still being fed through filtering function.

I am trying to understand why it behaves like this rather than giving up after first element is calculated as in the first case.
Any helpful information would be appreciated.



Why filter() after flatMap() is &quot;not completely&quot; lazy in Java streams?

I want to replace the following code using java8 `Optional`:

    public Obj getObjectFromDB() {
    	Obj obj = dao.find();
    	if (obj != null) {
    		obj.setAvailable(true);
    	} else {
    		logger.fatal(&quot;Object not available&quot;);
    	}
    
    	return obj;
    }


The following pseudocode does not work as there is no `orElseRun` method, but anyways it illustrates my purpose:

    public Optional&lt;Obj&gt; getObjectFromDB() {
    	Optional&lt;Obj&gt; obj = dao.find();
    	return obj.ifPresent(obj.setAvailable(true)).orElseRun(logger.fatal(&quot;Object not available&quot;));
    }


How to execute logic on Optional if not present?

The following Java code fails to compile:

    @FunctionalInterface
    private interface BiConsumer&lt;A, B&gt; {
        void accept(A a, B b);
    }
    
    private static void takeBiConsumer(BiConsumer&lt;String, String&gt; bc) { }
    
    public static void main(String[] args) {
        takeBiConsumer((String s1, String s2) -&gt; new String(&quot;hi&quot;)); // OK
        takeBiConsumer((String s1, String s2) -&gt; &quot;hi&quot;); // Error
    }

The compiler reports:

    Error:(31, 58) java: incompatible types: bad return type in lambda expression
        java.lang.String cannot be converted to void

The weird thing is that the line marked &quot;OK&quot; compiles fine, but the line marked &quot;Error&quot; fails. They seem essentially identical.

Why does this Java 8 lambda fail to compile?

Say we have a variable of type `IntFunction` that returns an integer array:

    IntFunction&lt;int[]&gt; i;

With Java 8 generics, it is possible to initialize this variable with a constructor reference like this:

    i = int[]::new

How does the Java compiler translate this to bytecode?

I know that for other types, like `String::new`, it can use an `invokedynamic` instruction that points to the String constructor `java/lang/String.&lt;init&gt;(...)`, which is just a method with a special meaning.

How does this work with arrays, seeing that there are special instructions for constructing arrays?

Content Type	Original Author	Original Content on Stackoverflow
Question	azalut	View Question on Stackoverflow
Solution 1 - Date	royB	View Answer on Stackoverflow
Solution 2 - Date	Stepi	View Answer on Stackoverflow
Solution 3 - Date	Chigozie D.	View Answer on Stackoverflow

How to compare LocalDate instances Java 8

Date Problem Overview

Date Solutions

Solution 1 - Date

Solution 2 - Date

Solution 3 - Date

What is Grunt for?

Using Bootstrap for Angular and Material design for Angular together

Attributions