You can set your DateFormatter amSymbol and pmSymbol as follow:

**Xcode 8.3 • Swift 3.1**

    let formatter = DateFormatter()
    formatter.locale = Locale(identifier: &quot;en_US_POSIX&quot;)
    formatter.dateFormat = &quot;h:mm a &#39;on&#39; MMMM dd, yyyy&quot;
    formatter.amSymbol = &quot;AM&quot;
    formatter.pmSymbol = &quot;PM&quot;
    
    let dateString = formatter.string(from: Date())
    print(dateString)   // &quot;4:44 PM on June 23, 2016\n&quot;


Added some formats in one place. Hope someone get help.

**Xcode 12 - Swift 5.3**

```
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = &quot;HH:mm:ss&quot;
var dateFromStr = dateFormatter.date(from: &quot;12:16:45&quot;)!

dateFormatter.dateFormat = &quot;hh:mm:ss a &#39;on&#39; MMMM dd, yyyy&quot;
//Output: 12:16:45 PM on January 01, 2000

dateFormatter.dateFormat = &quot;E, d MMM yyyy HH:mm:ss Z&quot;
//Output: Sat, 1 Jan 2000 12:16:45 +0600

dateFormatter.dateFormat = &quot;yyyy-MM-dd&#39;T&#39;HH:mm:ssZ&quot;
//Output: 2000-01-01T12:16:45+0600

dateFormatter.dateFormat = &quot;EEEE, MMM d, yyyy&quot;
//Output: Saturday, Jan 1, 2000

dateFormatter.dateFormat = &quot;MM-dd-yyyy HH:mm&quot;
//Output: 01-01-2000 12:16

dateFormatter.dateFormat = &quot;MMM d, h:mm a&quot;
//Output: Jan 1, 12:16 PM

dateFormatter.dateFormat = &quot;HH:mm:ss.SSS&quot;
//Output: 12:16:45.000

dateFormatter.dateFormat = &quot;MMM d, yyyy&quot;
//Output: Jan 1, 2000

dateFormatter.dateFormat = &quot;MM/dd/yyyy&quot;
//Output: 01/01/2000

dateFormatter.dateFormat = &quot;hh:mm:ss a&quot;
//Output: 12:16:45 PM

dateFormatter.dateFormat = &quot;MMMM yyyy&quot;
//Output: January 2000

dateFormatter.dateFormat = &quot;dd.MM.yy&quot;
//Output: 01.01.00

//Output: Customisable AP/PM symbols
dateFormatter.amSymbol = &quot;am&quot;
dateFormatter.pmSymbol = &quot;Pm&quot;
dateFormatter.dateFormat = &quot;a&quot;
//Output: Pm

// Usage
var timeFromDate = dateFormatter.string(from: dateFromStr)
print(timeFromDate)
```

Is there a way to selectively hide one specific input or output cell in IPython notebook?

I could only find the below code to show / hide all input cells. 

http://blog.nextgenetics.net/?e=102

But what if I only want to hide the first input cell of a notebook? 

How to hide one specific cell (input or output) in IPython Notebook?

To take advantage of the wide range of query methods included in `java.util.stream` of Jdk 8 I am attempted to design domain models where getters of relationship with `*` multiplicity (with zero or more instances ) return a `Stream&lt;T&gt;`, instead of an `Iterable&lt;T&gt;` or `Iterator&lt;T&gt;`.

My doubt is if there is any additional overhead incurred by the `Stream&lt;T&gt;` in comparison to the `Iterator&lt;T&gt;`?

So, is there any disadvantage of compromising my domain model with a `Stream&lt;T&gt;`?

Or instead, should I always return an `Iterator&lt;T&gt;` or `Iterable&lt;T&gt;`, and leave to the end-user the decision of choosing whether to use a stream, or not, by converting that iterator with the `StreamUtils`?

**Note** that returning a `Collection` is not a valid option because in this case most of the relationships are lazy and with unknown size.

Iterator versus Stream of Java 8

I wrote the following code to show a datetime in a particular format:

    let formatter = NSDateFormatter()
    formatter.dateStyle = NSDateFormatterStyle.LongStyle
    formatter.timeStyle = .MediumStyle
    formatter.dateFormat = &quot;HH:mm a &#39;on&#39; MMMM dd, yyyy&quot;
    let dateString = formatter.stringFromDate(newDate!)
    println(dateString)

Output

    12:16 pm on July 17, 2015

I want to show &#39;pm&#39; as &#39;PM&#39;(in capitals) and if phone has 24 hours format then AM/PM should not appear. Please help me. 

Show AM/PM in capitals in swift

I wrote the following code to show a datetime in a particular format:
<pre><code class="hljs language-ini">let formatter = NSDateFormatter()
formatter.dateStyle = NSDateFormatterStyle.LongStyle
formatter.timeStyle = .MediumStyle
formatter.dateFormat = "HH:mm a 'on' MMMM dd, yyyy"
let dateString = formatter.stringFromDate(newDate!)
println(dateString)
</code></pre>
Output
<pre><code class="hljs language-csharp">12:16 pm on July 17, 2015
</code></pre>
I want to show 'pm' as 'PM'(in capitals) and if phone has 24 hours format then AM/PM should not appear. Please help me.

I&#39;m new to Swift.  What is the difference between a computed property and a property set to a closure?  I know a computed property gets recalculated each time.  Is it different for the closure? i.e.
   

**Closure:**

    var pushBehavior: UIPushBehavior = {
        let lazilyCreatedPush = UIPushBehavior()
        lazilyCreatedPush.setAngle(50, magnitude: 50)
        return lazilyCreatedPush
    }()

**Computed:**

    var pushBehavior: UIPushBehavior {
        get{
            let lazilyCreatedPush = UIPushBehavior()
            lazilyCreatedPush.setAngle(50, magnitude: 50)
            return lazilyCreatedPush
        }
    }

Difference between computed property and property set with closure

Is there any way to make a toast message in swift ?

I have tried in objective c but could not find solution in swift.

    [self.view makeToast:@&quot;Account created Successfully&quot;
                         duration:0.5
                         position:@&quot;bottom&quot;];

How to create a toast message in Swift?

I have a piece of code which is generating lots of warnings (deprecated API)

Using clang* I could do:

    #pragma clang diagnostic push
    #pragma clang diagnostic ignored &quot;-Wdeprecated-declarations&quot;
        ...
    #pragma clang diagnostic pop

However this does not work in Swift.

How to do it in Swift?

Note: I don&#39;t want to disable the warning globally, nor even file wide, but just disable a specific warning in a specific part of my source code.

I do *not* want conditional compilation (which is the proposed answer of the supposed duplicate).
I just want to silence a warning WITHOUT using the new APIs.

How to silence a warning in Swift?

After reading [How to test equality of Swift enums with associated values][1], I implemented the following enum:

    enum CardRank {
        case Number(Int)
        case Jack
        case Queen
        case King
        case Ace
    }
    
    func ==(a: CardRank, b: CardRank) -&gt; Bool {
        switch (a, b) {
        case (.Number(let a), .Number(let b))   where a == b: return true
        case (.Jack, .Jack): return true
        case (.Queen, .Queen): return true
        case (.King, .King): return true
        case (.Ace, .Ace): return true
        default: return false
        }
    }

The following code works:

    let card: CardRank = CardRank.Jack
    if card == CardRank.Jack {
        print(&quot;You played a jack!&quot;)
    } else if card == CardRank.Number(2) {
        print(&quot;A two cannot be played at this time.&quot;)
    }

However, this doesn&#39;t compile:

    let number = CardRank.Number(5)
    if number == CardRank.Number {
        print(&quot;You must play a face card!&quot;)
    }

... and it gives the following error message:

&gt; Binary operator &#39;==&#39; cannot be applied to operands of type &#39;CardRank&#39; and &#39;(Int) -&gt; CardRank&#39;

I&#39;m assuming this is because it&#39;s expecting a full type and `CardRank.Number` does not specify an entire type, whereas `CardRank.Number(2)` did. However, in this case, I want it to match **any** number; not just a specific one.

Obviously I can use a switch statement, but the whole point of implementing the `==` operator was to avoid this verbose solution:

    switch number {
    case .Number:
        print(&quot;You must play a face card!&quot;)
    default:
        break
    }

Is there any way to compare an enum with associated values while ignoring its associated value?

**Note:** I realize that I could change the case in the `==` method to `case (.Number, .Number): return true`, but, although it would return true correctly, my comparison would still look like its being compared to a specific number (`number == CardRank.Number(2)`; where 2 is a dummy value) rather than *any* number (`number == CardRank.Number`).

  [1]: https://stackoverflow.com/questions/24339807/how-to-test-equality-of-swift-enums-with-associated-values




How to compare enum with associated values by ignoring its associated value in Swift?

Basic way doesn&#39;t work.

    for index in 0 ..&lt; list.count {
        if list[index] == nil {
            list.removeAtIndex(index) //this will cause array index out of range
        }
    }



How can I remove all nil elements in a Swift array?

I am working in java application where i am using the Java 8.

I have integrated the database(multiple database Oracle,Mysql,Postgres) and where in DB i string the created date.

the date format in DB is - 2015-07-29 16:23:28.143

I fetch this from DB and set in Localdatetime object 

    myObj.setCreated(rs.getTimestamp(&quot;created&quot;).toLocalDateTime());

So here the issue is i dont want to show/send the millisecond in the response. i want to show/send date like 2015-07-29 16:23:28

I tried the formatter but it fails as it giving string and i dont want change the LocalDateTime object to String as this going to cause major change in all Java application.So want to find the solution

Can anybody know any solution on this.

LocalDateTime remove the milliseconds

I have an array of datetime objects, and I would like to find which element in the array is the closest to a given date (e.g `datetime.datetime(2014,12,16)`)

[This](https://stackoverflow.com/questions/17249220/getting-the-closest-date-to-a-given-date) post shows how to find the nearest date *which is not before the given date*.  How can I alter this code so that it can return dates that are before a given date?

For example, if the array housed elements `datetime.datetime(2014,12,10)` and `datetime.datetime(2014,12,28)`, the former item should be returned because it is closest to `datetime.datetime(2014,12,16)` in absolute value.

Find the closest date to a given date

I&#39;m trying to convert UTC time to the local time. I&#39;ve been following this example from this link: http://jsfiddle.net/FLhpq/4/light/. I can&#39;t seem to get the right local output. For example, if its 10: 30 am in here, instead of getting 10:30 ill get 15: 30. Here is my code:

    var date = moment.utc().format(&#39;YYYY-MM-DD HH:mm:ss&#39;);
    
    var localTime  = moment.utc(date).toDate();
    
    localTime = moment(localTime).format(&#39;YYYY-MM-DD HH:mm:ss&#39;);
    
    console.log(&quot;moment: &quot; + localTime);

No matter what I do the time always comes out at UTC time. I live in Houston so I know timezone is the issue. I&#39;ve followed the code in the link but can seem to get the local time. What am I doing wrong?

Moment Js UTC to Local Time

Can any Java 8 + JDBC expert tell me if something&#39;s wrong in the following reasoning? And, if in the secrets of Gods, why this hasn&#39;t been done?

A `java.sql.Date` is currently the type used by JDBC to map to the DATE SQL type, which represents a date without time, and without timezone. But this class is awfully designed, since it&#39;s in fact a subclass of `java.util.Date`, which stores a precise instant in time, up to the millisecond.

To represent the date 2015-09-13 in database, we&#39;re thus forced to choose a timezone, parse the string &quot;2015-09-13T00:00:00.000&quot; in that timezone as a java.util.Date to get a millisecond value, then construct a `java.sql.Date` from this millisecond value, and finally call `setDate()` on the prepared statement, passing a Calendar holding the timezone chosen in order for the JDBC driver to be able to correctly recompute the date 2015-09-13 from this millisecond value. This process is made a bit simpler by using the default timezone everywhere, and not passing a Calendar.

Java 8 introduces a LocalDate class, which is a much better fit for the DATE database type, since it&#39;s not a precise moment in time, and is thus not dependent on the timezone. And Java 8 also introduces default methods, which would allow to make backward-compatible changes to the PreparedStatement and ResultSet interfaces.

So, haven&#39;t we missed a huge opportunity to clean up the mess in JDBC while still maintaining backward compatibility? Java 8 could simply have added those default methods to PreparedStatement and ResultSet:

    default public void setLocalDate(int parameterIndex, LocalDate localDate) {
        if (localDate == null) {
            setDate(parameterIndex, null);
        }
        else {
            ZoneId utc = ZoneId.of(&quot;UTC&quot;);
            java.util.Date utilDate = java.util.Date.from(localDate.atStartOfDay(utc).toInstant());
            Date sqlDate = new Date(utilDate.getTime());
            setDate(parameterIndex, sqlDate, Calendar.getInstance(TimeZone.getTimeZone(utc)));
        }
    }

    default LocalDate getLocalDate(int parameterIndex) {
        ZoneId utc = ZoneId.of(&quot;UTC&quot;);
        Date sqlDate = getDate(parameterIndex, Calendar.getInstance(TimeZone.getTimeZone(utc)));
        if (sqlDate == null) {
            return null;
        }

        java.util.Date utilDate = new java.util.Date(sqlDate.getTime());
        return utilDate.toInstant().atZone(utc).toLocalDate();
    }

Of course, the same reasoning applies to the support of Instant for the TIMESTAMP type, and the support of LocalTime for the TIME type.

Missed opportunity to fix JDBC date handling in Java 8?

I am using Laravel 5.1

Few days ago I used `protected $dates = [&#39;license_expire&#39;]` in my model to convert the string date to Carbon instances. In HTML the default value in create form for the date was `Carbon\Carbon::now()-&gt;format(&#39;Y-m-d&#39;)`

In order to show alert in home page i used `&lt;p&gt;Licence Expired: &lt;b&gt;{{ $employee-&gt;license_expire &lt; Carbon\Carbon::now()?&#39;License has expired&#39;:$employee-&gt;license_expire-&gt;diffForHumans() }}&lt;/b&gt;&lt;/p&gt;`

Till then diffForHumans() method works fine.

But in that case the edit form&#39;s default value also was today&#39;s date no matter what was in database(I am using a partial form). To resolve it I change the default value in HTML was NUll. And add another method in my model to show current date in create form.

    public function getLicenseExpireAttribute($date)
    {
        return Carbon::parse($date)-&gt;format(&#39;Y-m-d&#39;);
    }
After that when i go to home page i have an `FatalErrorException` which says `Call to a member function diffForHumans() on string`

When I check the date with `dd($employee-&gt;license_expire)` it become STRING again.

Can anybody tell me how can I convert the string to Carbon in this situation?

or

Make my create form&#39;s default date as today&#39;s date, the edit form&#39;s date from database and I can use diffForHumans() to show alert in home page?

Convert String to Carbon

I am replacing my old JSON parsing code with Swift&#39;s Codable and am running into a bit of a snag. I guess it isn&#39;t as much a Codable question as it is a DateFormatter question.

**Start with a struct**

     struct JustADate: Codable {
        var date: Date
     }

**and a json string**

    let json = &quot;&quot;&quot;
      { &quot;date&quot;: &quot;2017-06-19T18:43:19Z&quot; }
    &quot;&quot;&quot;

**now lets decode**

    let decoder = JSONDecoder()
    decoder.dateDecodingStrategy = .iso8601

    let data = json.data(using: .utf8)!
    let justADate = try! decoder.decode(JustADate.self, from: data) //all good

But if we change the date so that it has fractional seconds, for example:

    let json = &quot;&quot;&quot;
      { &quot;date&quot;: &quot;2017-06-19T18:43:19.532Z&quot; }
    &quot;&quot;&quot;

Now it breaks. The dates sometimes come back with fractional seconds and sometimes do not. The way I used to solve it was in my mapping code I had a transform function that tried both dateFormats with and without the fractional seconds. I am not quite sure how to approach it using Codable however. Any suggestions?

Content Type	Original Author	Original Content on Stackoverflow
Question	Amit Raj	View Question on Stackoverflow
Solution 1 - Swift	Leo Dabus	View Answer on Stackoverflow
Solution 2 - Swift	bigbubble	View Answer on Stackoverflow

Show AM/PM in capitals in swift

Swift Problem Overview

Swift Solutions

Solution 1 - Swift

Solution 2 - Swift

Iterator versus Stream of Java 8

How to hide one specific cell (input or output) in IPython Notebook?

Attributions