#Affinetransform | Programs & Examples on Affinetransform

UIView Infinite 360 degree rotation animation?

There are following different ways to perform 360 degree animation with UIView.

Using CABasicAnimation

var rotationAnimation = CABasicAnimation()
rotationAnimation = CABasicAnimation.init(keyPath: "transform.rotation.z")
rotationAnimation.toValue = NSNumber(value: (Double.pi))
rotationAnimation.duration = 1.0
rotationAnimation.isCumulative = true
rotationAnimation.repeatCount = 100.0
view.layer.add(rotationAnimation, forKey: "rotationAnimation")

Here is an extension functions for UIView that handles start & stop rotation operations:

extension UIView {

    // Start rotation
    func startRotation() {
        let rotation = CABasicAnimation(keyPath: "transform.rotation.z")
        rotation.fromValue = 0
        rotation.toValue = NSNumber(value: Double.pi)
        rotation.duration = 1.0
        rotation.isCumulative = true
        rotation.repeatCount = FLT_MAX
        self.layer.add(rotation, forKey: "rotationAnimation")
    }

    // Stop rotation
    func stopRotation() {
        self.layer.removeAnimation(forKey: "rotationAnimation")
    }
}

Now using, UIView.animation closure:

UIView.animate(withDuration: 0.5, animations: { 
      view.transform = CGAffineTransform(rotationAngle: (CGFloat(Double.pi)) 
}) { (isAnimationComplete) in
    // Animation completed 
}

Java: Rotating Images

public static BufferedImage rotateCw( BufferedImage img )
{
    int         width  = img.getWidth();
    int         height = img.getHeight();
    BufferedImage   newImage = new BufferedImage( height, width, img.getType() );

    for( int i=0 ; i < width ; i++ )
        for( int j=0 ; j < height ; j++ )
            newImage.setRGB( height-1-j, i, img.getRGB(i,j) );

    return newImage;
}

from https://coderanch.com/t/485958/java/Rotating-buffered-image

How to Rotate a UIImage 90 degrees?

Swift 3 UIImage extension:

func fixOrientation() -> UIImage {

    // No-op if the orientation is already correct
    if ( self.imageOrientation == .up ) {
        return self;
    }

    // We need to calculate the proper transformation to make the image upright.
    // We do it in 2 steps: Rotate if Left/Right/Down, and then flip if Mirrored.
    var transform: CGAffineTransform = .identity

    if ( self.imageOrientation == .down || self.imageOrientation == .downMirrored ) {
        transform = transform.translatedBy(x: self.size.width, y: self.size.height)
        transform = transform.rotated(by: .pi)
    }

    if ( self.imageOrientation == .left || self.imageOrientation == .leftMirrored ) {
        transform = transform.translatedBy(x: self.size.width, y: 0)
        transform = transform.rotated(by: .pi/2)
    }

    if ( self.imageOrientation == .right || self.imageOrientation == .rightMirrored ) {
        transform = transform.translatedBy(x: 0, y: self.size.height);
        transform = transform.rotated(by: -.pi/2);
    }

    if ( self.imageOrientation == .upMirrored || self.imageOrientation == .downMirrored ) {
        transform = transform.translatedBy(x: self.size.width, y: 0)
        transform = transform.scaledBy(x: -1, y: 1)
    }

    if ( self.imageOrientation == .leftMirrored || self.imageOrientation == .rightMirrored ) {
        transform = transform.translatedBy(x: self.size.height, y: 0);
        transform = transform.scaledBy(x: -1, y: 1);
    }

    // Now we draw the underlying CGImage into a new context, applying the transform
    // calculated above.
    let ctx: CGContext = CGContext(data: nil, width: Int(self.size.width), height: Int(self.size.height),
                                   bitsPerComponent: self.cgImage!.bitsPerComponent, bytesPerRow: 0,
                                   space: self.cgImage!.colorSpace!,
                                   bitmapInfo: self.cgImage!.bitmapInfo.rawValue)!;

    ctx.concatenate(transform)

    if ( self.imageOrientation == .left ||
        self.imageOrientation == .leftMirrored ||
        self.imageOrientation == .right ||
        self.imageOrientation == .rightMirrored ) {
        ctx.draw(self.cgImage!, in: CGRect(x: 0.0,y: 0.0,width: self.size.height,height: self.size.width))
    } else {
        ctx.draw(self.cgImage!, in: CGRect(x: 0.0,y: 0.0,width: self.size.width,height: self.size.height))
    }

    // And now we just create a new UIImage from the drawing context and return it
    return UIImage(cgImage: ctx.makeImage()!)
}

How to read a CSV file into a .NET Datatable

Can't resist adding my own spin to this. This is so much better and more compact than what I've used in the past.

This solution:

Does not depend on a database driver or 3rd party library.
Will not fail on duplicate column names
Handles commas in the data
Handles any delimiter, not just commas (although that is the default)

Here's what I came up with:

  Public Function ToDataTable(FileName As String, Optional Delimiter As String = ",") As DataTable
    ToDataTable = New DataTable
    Using TextFieldParser As New Microsoft.VisualBasic.FileIO.TextFieldParser(FileName) With
      {.HasFieldsEnclosedInQuotes = True, .TextFieldType = Microsoft.VisualBasic.FileIO.FieldType.Delimited, .TrimWhiteSpace = True}
      With TextFieldParser
        .SetDelimiters({Delimiter})
        .ReadFields.ToList.Unique.ForEach(Sub(x) ToDataTable.Columns.Add(x))
        ToDataTable.Columns.Cast(Of DataColumn).ToList.ForEach(Sub(x) x.AllowDBNull = True)
        Do Until .EndOfData
          ToDataTable.Rows.Add(.ReadFields.Select(Function(x) Text.BlankToNothing(x)).ToArray)
        Loop
      End With
    End Using
  End Function

It depends on an extension method (Unique) to handle duplicate column names to be found as my answer in How to append unique numbers to a list of strings

And here's the BlankToNothing helper function:

  Public Function BlankToNothing(ByVal Value As String) As Object 
    If String.IsNullOrEmpty(Value) Then Return Nothing
    Return Value
  End Function

Converting from IEnumerable to List

If you're using an implementation of System.Collections.IEnumerable you can do like following to convert it to a List. The following uses Enumerable.Cast method to convert IEnumberable to a Generic List.

//ArrayList Implements IEnumerable interface
ArrayList _provinces = new System.Collections.ArrayList();
_provinces.Add("Western");
_provinces.Add("Eastern");

List<string> provinces = _provinces.Cast<string>().ToList();

If you're using Generic version IEnumerable<T>, The conversion is straight forward. Since both are generics, you can do like below,

IEnumerable<int> values = Enumerable.Range(1, 10);
List<int> valueList = values.ToList();

But if the IEnumerable is null, when you try to convert it to a List, you'll get ArgumentNullException saying Value cannot be null.

IEnumerable<int> values2 = null;
List<int> valueList2 = values2.ToList();

enter image description here

Therefore as mentioned in the other answer, remember to do a null check before converting it to a List.

How to move all files including hidden files into parent directory via *

By using the find command in conjunction with the mv command, you can prevent the mv command from trying to move directories (e.g. .. and .) and subdirectories. Here's one option:

find /path/subfolder -maxdepth 1 -type f -name '*' -exec mv -n {} /path \;

There are problems with some of the other answers provided. For example, each of the following will try to move subdirectories from the source path:

1) mv /path/subfolder/* /path/ ; mv /path/subfolder/.* /path/
2) mv /path/subfolder/{.,}* /path/ 
3) mv /source/path/{.[!.],}* /destination/path

Also, 2) includes the . and .. files and 3) misses files like ..foobar, ...barfoo, etc.

You could use, mv /source/path/{.[!.],..?,}* /destination/path, which would include the files missed by 3), but it would still try to move subdirectories. Using the find command with the mv command as I describe above eliminates all these problems.

Creating virtual directories in IIS express

In VS2013 I did this in the following steps:

1.Right-click the web application project and hit Properties

2.View the "Web" tab of the Properties page

3.Under Servers, with "IIS Express" being the default choice of the dropdown, in the "Project Url" change the url using the port number to one that suits you. For example I deleted the port number and added "/MVCDemo4" after the localhost.

4.Click the "Create Virtual Directory" button.

5.Run your project and the new url will be used

How to SELECT a dropdown list item by value programmatically

Ian Boyd (above) had a great answer -- Add this to Ian Boyd's class "WebExtensions" to select an item in a dropdownlist based on text:

/// <summary>
/// Selects the item in the list control that contains the specified text, if it exists.
/// </summary>
/// <param name="dropDownList"></param>
/// <param name="selectedText">The text of the item in the list control to select</param>
/// <returns>Returns true if the value exists in the list control, false otherwise</returns>
public static Boolean SetSelectedText(this DropDownList dropDownList, String selectedText)
{
    ListItem selectedListItem = dropDownList.Items.FindByText(selectedText);
    if (selectedListItem != null)
    {
        selectedListItem.Selected = true;
        return true;
    }
    else
        return false;
}

To call it:

WebExtensions.SetSelectedText(MyDropDownList, "MyValue");

Oracle - Insert New Row with Auto Incremental ID

SQL trigger for automatic date generation in oracle table:

CREATE OR REPLACE TRIGGER name_of_trigger

BEFORE INSERT

ON table_name

REFERENCING NEW AS NEW

FOR EACH ROW

BEGIN

SELECT sysdate INTO :NEW.column_name FROM dual;

END;

Difference between .keystore file and .jks file

You are confused on this.

A keystore is a container of certificates, private keys etc.

There are specifications of what should be the format of this keystore and the predominant is the #PKCS12

JKS is Java's keystore implementation. There is also BKS etc.

These are all keystore types.

So to answer your question:

difference between .keystore files and .jks files

There is none. JKS are keystore files. There is difference though between keystore types. E.g. JKS vs #PKCS12

"application blocked by security settings" prevent applets running using oracle SE 7 update 51 on firefox on Linux mint

As an alternative answer, there's a command line to invoke directly the Control Panel, which is javaws -viewer, should work for both openJDK and Oracle's JDK (thanks @Nasser for checking the availability in Oracle's JDK)

Same caution to run as the user you need to access permissions with applies.

How do you do relative time in Rails?

Something like this would work.

def relative_time(start_time)
  diff_seconds = Time.now - start_time
  case diff_seconds
    when 0 .. 59
      puts "#{diff_seconds} seconds ago"
    when 60 .. (3600-1)
      puts "#{diff_seconds/60} minutes ago"
    when 3600 .. (3600*24-1)
      puts "#{diff_seconds/3600} hours ago"
    when (3600*24) .. (3600*24*30) 
      puts "#{diff_seconds/(3600*24)} days ago"
    else
      puts start_time.strftime("%m/%d/%Y")
  end
end

'0000-00-00 00:00:00' can not be represented as java.sql.Timestamp error

There was no year 0000 and there is no month 00 or day 00. I suggest you try

0001-01-01 00:00:00

While a year 0 has been defined in some standards, it is more likely to be confusing than useful IMHO.

Kill all processes for a given user

What about iterating on the /proc virtual file system ? http://linux.die.net/man/5/proc ?

How to read multiple Integer values from a single line of input in Java?

i know it's old discuss :) i tested below code it's worked

`String day = "";
 day = sc.next();
 days[i] = Integer.parseInt(day);`

How do I load a file from resource folder?

To read the files from src/resources folder then try this :

DataSource fds = new FileDataSource(getFileHandle("images/sample.jpeg"));

public static File getFileHandle(String fileName){
       return new File(YourClassName.class.getClassLoader().getResource(fileName).getFile());
}

in case of non static reference:

return new File(getClass().getClassLoader().getResource(fileName).getFile());

Spring Boot Program cannot find main class

Have a look under "Run -> Run Configurations..." in Eclipse. You should delete the new one which you created by mistake, you should still have the existing one.

I suspect it has created a new run configuration for the "Run as Maven Test" and you are now always starting this one.

How do I do an insert with DATETIME now inside of SQL server mgmt studioÜ

Just use GETDATE() or GETUTCDATE() (if you want to get the "universal" UTC time, instead of your local server's time-zone related time).

INSERT INTO [Business]
           ([IsDeleted]
           ,[FirstName]
           ,[LastName]
           ,[LastUpdated]
           ,[LastUpdatedBy])
     VALUES
           (0, 'Joe', 'Thomas', 
           GETDATE(),  <LastUpdatedBy, nvarchar(50),>)

Replacing a char at a given index in string?

What is the Python equivalent for a case/switch statement?

The direct replacement is if/elif/else.

However, in many cases there are better ways to do it in Python. See "Replacements for switch statement in Python?".

keycode 13 is for which key

Keycode 13 is the Enter key

Which keycode for escape key with jQuery

AngularJS. How to call controller function from outside of controller component

It may be worth considering if having your menu without any associated scope is the right way to go. Its not really the angular way.

But, if it is the way you need to go, then you can do it by adding the functions to $rootScope and then within those functions using $broadcast to send events. your controller then uses $on to listen for those events.

Another thing to consider if you do end up having your menu without a scope is that if you have multiple routes, then all of your controllers will have to have their own upate and get functions. (this is assuming you have multiple controllers)

What is the purpose and use of **kwargs?

You can use **kwargs to let your functions take an arbitrary number of keyword arguments ("kwargs" means "keyword arguments"):

>>> def print_keyword_args(**kwargs):
...     # kwargs is a dict of the keyword args passed to the function
...     for key, value in kwargs.iteritems():
...         print "%s = %s" % (key, value)
... 
>>> print_keyword_args(first_name="John", last_name="Doe")
first_name = John
last_name = Doe

You can also use the **kwargs syntax when calling functions by constructing a dictionary of keyword arguments and passing it to your function:

>>> kwargs = {'first_name': 'Bobby', 'last_name': 'Smith'}
>>> print_keyword_args(**kwargs)
first_name = Bobby
last_name = Smith

The Python Tutorial contains a good explanation of how it works, along with some nice examples.

<--Update-->

For people using Python 3, instead of iteritems(), use items()

Check if a string within a list contains a specific string with Linq

LINQ Any() would do the job:

bool contains = myList.Any(s => s.Contains(pattern));

Any(), MSDN:

Determines whether any element of a sequence satisfies a condition

How to read data from a zip file without having to unzip the entire file

With .Net Framework 4.5 (using ZipArchive):

using (ZipArchive zip = ZipFile.Open(zipfile, ZipArchiveMode.Read))
    foreach (ZipArchiveEntry entry in zip.Entries)
        if(entry.Name == "myfile")
            entry.ExtractToFile("myfile");

Find "myfile" in zipfile and extract it.

IIS7 Permissions Overview - ApplicationPoolIdentity

Remember to use the server's local name, not the domain name, when resolving the name

IIS AppPool\DefaultAppPool

(just a reminder because this tripped me up for a bit): enter image description here

How to use *ngIf else?

<div *ngIf="show; else elseBlock">Text to show</div>
<ng-template #elseBlock>Alternate text while primary text is hidden</ng-template>

AssertNull should be used or AssertNotNull

assertNotNull asserts that the object is not null. If it is null the test fails, so you want that.

How do I prevent 'git diff' from using a pager?

Just follow below instructions.

Just type vi ~/.gitconfig in your terminal.
Paste LESS="-F -X $LESS" line.
Press :wq and enter.
Restart your terminal.

No appenders could be found for logger(log4j)?

This Short introduction to log4j guide is a little bit old but still valid.

That guide will give you some information about how to use loggers and appenders.

Just to get you going you have two simple approaches you can take.

First one is to just add this line to your main method:

BasicConfigurator.configure();

Second approach is to add this standard log4j.properties (taken from the above mentioned guide) file to your classpath:

# Set root logger level to DEBUG and its only appender to A1.
log4j.rootLogger=DEBUG, A1

# A1 is set to be a ConsoleAppender.
log4j.appender.A1=org.apache.log4j.ConsoleAppender

# A1 uses PatternLayout.
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n

Why does git status show branch is up-to-date when changes exist upstream?

"origin/master" refers to the reference poiting to the HEAD commit of branch "origin/master". A reference is a human-friendly alias name to a Git object, typically a commit object. "origin/master" reference only gets updated when you git push to your remote (http://git-scm.com/book/en/v2/Git-Internals-Git-References#Remotes).

From within the root of your project, run:

cat .git/refs/remotes/origin/master

Compare the displayed commit ID with:

cat .git/refs/heads/master

They should be the same, and that's why Git says master is up-to-date with origin/master.

When you run

git fetch origin master

That retrieves new Git objects locally under .git/objects folder. And Git updates .git/FETCH_HEAD so that now, it points to the latest commit of the fetched branch.

So to see the differences between your current local branch, and the branch fetched from upstream, you can run

git diff HEAD FETCH_HEAD

RegEx to exclude a specific string constant

Try this regular expression:

^(.{0,2}|([^A]..|A[^B].|AB[^C])|.{4,})$

It describes three cases:

less than three arbitrary character
exactly three characters, while either
- the first is not A, or
- the first is A but the second is not B, or
- the first is A, the second B but the third is not C
more than three arbitrary characters

storing user input in array

You have at least these 3 issues:

you are not getting the element's value properly
The div that you are trying to use to display whether the values have been saved or not has id display yet in your javascript you attempt to get element myDiv which is not even defined in your markup.
Never name variables with reserved keywords in javascript. using "string" as a variable name is NOT a good thing to do on most of the languages I can think of. I renamed your string variable to "content" instead. See below.

You can save all three values at once by doing:

var title=new Array();
var names=new Array();//renamed to names -added an S- 
                      //to avoid conflicts with the input named "name"
var tickets=new Array();

function insert(){
    var titleValue = document.getElementById('title').value;
    var actorValue = document.getElementById('name').value;
    var ticketsValue = document.getElementById('tickets').value;
    title[title.length]=titleValue;
    names[names.length]=actorValue;
    tickets[tickets.length]=ticketsValue;
  }

And then change the show function to:

function show() {
  var content="<b>All Elements of the Arrays :</b><br>";
  for(var i = 0; i < title.length; i++) {
     content +=title[i]+"<br>";
  }
  for(var i = 0; i < names.length; i++) {
     content +=names[i]+"<br>";
  }
  for(var i = 0; i < tickets.length; i++) {
     content +=tickets[i]+"<br>";
  }
  document.getElementById('display').innerHTML = content; //note that I changed 
                                                    //to 'display' because that's
                                              //what you have in your markup
}

Here's a jsfiddle for you to play around.

How do write IF ELSE statement in a MySQL query

according to the mySQL reference manual this the syntax of using if and else statement :

IF search_condition THEN statement_list
[ELSEIF search_condition THEN statement_list] ...
[ELSE statement_list]
END IF

So regarding your query :

x = IF((action=2)&&(state=0),1,2);

or you can use

IF ((action=2)&&(state=0)) then 
state = 1;
ELSE 
state = 2;
END IF;

There is good example in this link : http://easysolutionweb.com/sql-pl-sql/how-to-use-if-and-else-in-mysql/

Spring MVC - How to get all request params in a map in Spring controller?

While the other answers are correct it certainly is not the "Spring way" to use the HttpServletRequest object directly. The answer is actually quite simple and what you would expect if you're familiar with Spring MVC.

@RequestMapping(value = {"/search/", "/search"}, method = RequestMethod.GET)
public String search(
@RequestParam Map<String,String> allRequestParams, ModelMap model) {
   return "viewName";
}

How do I check in SQLite whether a table exists?

Using a simple SELECT query is - in my opinion - quite reliable. Most of all it can check table existence in many different database types (SQLite / MySQL).

SELECT 1 FROM table;

It makes sense when you can use other reliable mechanism for determining if the query succeeded (for example, you query a database via QSqlQuery in Qt).

In Perl, how do I create a hash whose keys come from a given array?

You could also use Perl6::Junction.

use Perl6::Junction qw'any';

my @arr = ( 1, 2, 3 );

if( any(@arr) == 1 ){ ... }

Do not want scientific notation on plot axis

You can use format or formatC to, ahem, format your axis labels.

For whole numbers, try

x <- 10 ^ (1:10)
format(x, scientific = FALSE)
formatC(x, digits = 0, format = "f")

If the numbers are convertable to actual integers (i.e., not too big), you can also use

formatC(x, format = "d")

How you get the labels onto your axis depends upon the plotting system that you are using.

Copy files from one directory into an existing directory

If you want to copy something from one directory into the current directory, do this:

cp dir1/* .

This assumes you're not trying to copy hidden files.

How to crop a CvMat in OpenCV?

OpenCV has region of interest functions which you may find useful. If you are using the cv::Mat then you could use something like the following.

// You mention that you start with a CVMat* imagesource
CVMat * imagesource;

// Transform it into the C++ cv::Mat format
cv::Mat image(imagesource); 

// Setup a rectangle to define your region of interest
cv::Rect myROI(10, 10, 100, 100);

// Crop the full image to that image contained by the rectangle myROI
// Note that this doesn't copy the data
cv::Mat croppedImage = image(myROI);

Documentation for extracting sub image

How to find sitemap.xml path on websites?

Use Google Search Operators to find it for you

search google with the below code..

inurl:domain.com filetype:xml click on this to view sitemap search example

change domain.com to the domain you want to find the sitemap. this should list all the xml files listed for the given domain.. including all sitemaps :)

Should IBOutlets be strong or weak under ARC?

While the documentation recommends using weak on properties for subviews, since iOS 6 it seems to be fine to use strong (the default ownership qualifier) instead. That's caused by the change in UIViewController that views are not unloaded anymore.

Before iOS 6, if you kept strong links to subviews of the controller's view around, if the view controller's main view got unloaded, those would hold onto the subviews as long as the view controller is around.
Since iOS 6, views are not unloaded anymore, but loaded once and then stick around as long as their controller is there. So strong properties won't matter. They also won't create strong reference cycles, since they point down the strong reference graph.

That said, I am torn between using

@property (nonatomic, weak) IBOutlet UIButton *button;

and

@property (nonatomic) IBOutlet UIButton *button;

in iOS 6 and after:

Using weak clearly states that the controller doesn't want ownership of the button.
But omitting weak doesn't hurt in iOS 6 without view unloading, and is shorter. Some may point out that is also faster, but I have yet to encounter an app that is too slow because of weak IBOutlets.
Not using weak may be perceived as an error.

Bottom line: Since iOS 6 we can't get this wrong anymore as long as we don't use view unloading. Time to party. ;)

Submit form with Enter key without submit button?

Jay Gilford's answer will work, but I think really the easiest way is to just slap a display: none; on a submit button in the form.

How can I specify a local gem in my Gemfile?

If you want the branch too:

gem 'foo', path: "point/to/your/path", branch: "branch-name"

add controls vertically instead of horizontally using flow layout

I hope what you are trying to achieve is like this. For this please use Box layout.

package com.kcing.kailas.sample.client;

import javax.swing.BoxLayout;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.WindowConstants;

public class Testing extends JFrame {

    private JPanel jContentPane = null;

    public Testing() {
        super();
        initialize();
    }

    private void initialize() {
        this.setSize(300, 200);
        this.setContentPane(getJContentPane());
        this.setTitle("JFrame");
    }

    private JPanel getJContentPane() {
        if (jContentPane == null) {
            jContentPane = new JPanel();
            jContentPane.setLayout(null);

            JPanel panel = new JPanel();

            panel.setBounds(61, 11, 81, 140);
            panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
            jContentPane.add(panel);

            JCheckBox c1 = new JCheckBox("Check1");
            panel.add(c1);
            c1 = new JCheckBox("Check2");
            panel.add(c1);
            c1 = new JCheckBox("Check3");
            panel.add(c1);
            c1 = new JCheckBox("Check4");
            panel.add(c1);
        }
        return jContentPane;
    }

    public static void main(String[] args) throws Exception {
        Testing frame = new Testing();
        frame.setVisible(true);
        frame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
    }
}

How to break line in JavaScript?

Here you are ;-)

<script type="text/javascript">
    alert("Hello there.\nI am on a second line ;-)")
</script>

Change background colour for Visual Studio

Tools -> Options -> Under the Environment section there are Fonts & Colors, change the Item Background.

Get current value selected in dropdown using jQuery

You can also use :checked

$("#myselect option:checked").val(); //to get value

or as said in other answers simply

$("#myselect").val(); //to get value

and

$("#myselect option:checked").text(); //to get text

How to fix java.lang.UnsupportedClassVersionError: Unsupported major.minor version

I got the same problem with a project written in 1.7 and tried to execute in 1.6.

My solution in Eclipse:

Right click on your Project Properties -> Java Build Path -> Libraries
Select your JRE System Library and click Edit on the right, and choose the target JRE.
Now go to Java Compiler on the left, and change the Compiler compliance level to your target.

That worked for me.

How to assign a heredoc value to a variable in Bash?

Branching off Neil's answer, you often don't need a var at all, you can use a function in much the same way as a variable and it's much easier to read than the inline or read-based solutions.

$ complex_message() {
  cat <<'EOF'
abc'asdf"
$(dont-execute-this)
foo"bar"''
EOF
}

$ echo "This is a $(complex_message)"
This is a abc'asdf"
$(dont-execute-this)
foo"bar"''

Python: How would you save a simple settings/config file?

Try using ReadSettings:

from readsettings import ReadSettings
data = ReadSettings("settings.json") # Load or create any json, yml, yaml or toml file
data["name"] = "value" # Set "name" to "value"
data["name"] # Returns: "value"

gdb: "No symbol table is loaded"

I have the same problem and I followed this Post, it solved my problem.

Follow the following 2 steps:

Make sure the optimization level is -O0
Add -ggdb flag when compiling your program

Good luck!

Execution sequence of Group By, Having and Where clause in SQL Server?

This is the SQL Order of execution of a Query,

You can check order of execution with examples from this article.

For you question below lines might be helpful and directly got from this article.

GROUP BY --> The remaining rows after the WHERE constraints are applied are then grouped based on common values in the column specified in the GROUP BY clause. As a result of the grouping, there will only be as many rows as there are unique values in that column. Implicitly, this means that you should only need to use this when you have aggregate functions in your query.

HAVING --> If the query has a GROUP BY clause, then the constraints in the HAVING clause are then applied to the grouped rows, discard the grouped rows that don't satisfy the constraint. Like the WHERE clause, aliases are also not accessible from this step in most databases.

References:-

Excel "External table is not in the expected format."

I was getting errors with third party and Oledb reading of a XLSX workbook. The issue appears to be a hidden worksheet that causes a error. Unhiding the worksheet enabled the workbook to import.

How to sort by dates excel?

Select the whole column
Right click -> Format cells... -> Number -> Category: Date -> OK
Data -> Text to Columns -> select Delimited -> Next -> in your case selection of Delimiters doesn't matter -> Next -> select Date: DMY -> Finish

Now you should be able to sort by this column either Oldest to Newest or Newest to Oldest

Explanation of <script type = "text/template"> ... </script>

By setting script tag type other than text/javascript, browser will not execute the internal code of script tag. This is called micro template. This concept is widely used in Single page application(aka SPA).

<script type="text/template">I am a Micro template. 
  I am going to make your web page faster.</script>

For micro template, type of the script tag is text/template. It is very well explained by Jquery creator John Resig http://ejohn.org/blog/javascript-micro-templating/

how to declare global variable in SQL Server..?

I like the approach of using a table with a column for each global variable. This way you get autocomplete to aid in coding the retrieval of the variable. The table can be restricted to a single row as outlined here: SQL Server: how to constrain a table to contain a single row?

How to extract table as text from the PDF using Python?

If your pdf is text-based and not a scanned document (i.e. if you can click and drag to select text in your table in a PDF viewer), then you can use the module camelot-py with

import camelot
tables = camelot.read_pdf('foo.pdf')

You then can choose how you want to save the tables (as csv, json, excel, html, sqlite), and whether the output should be compressed in a ZIP archive.

tables.export('foo.csv', f='csv', compress=False)

Edit: tabula-py appears roughly 6 times faster than camelot-py so that should be used instead.

import camelot
import cProfile
import pstats
import tabula

cmd_tabula = "tabula.read_pdf('table.pdf', pages='1', lattice=True)"
prof_tabula = cProfile.Profile().run(cmd_tabula)
time_tabula = pstats.Stats(prof_tabula).total_tt

cmd_camelot = "camelot.read_pdf('table.pdf', pages='1', flavor='lattice')"
prof_camelot = cProfile.Profile().run(cmd_camelot)
time_camelot = pstats.Stats(prof_camelot).total_tt

print(time_tabula, time_camelot, time_camelot/time_tabula)

gave

1.8495559890000015 11.057014036000016 5.978199147125147

How can I delete all cookies with JavaScript?

On the face of it, it looks okay - if you call eraseCookie() on each cookie that is read from document.cookie, then all of your cookies will be gone.

Try this:

var cookies = document.cookie.split(";");
for (var i = 0; i < cookies.length; i++)
  eraseCookie(cookies[i].split("=")[0]);

All of this with the following caveat:

JavaScript cannot remove cookies that have the HttpOnly flag set.

How to solve "Plugin execution not covered by lifecycle configuration" for Spring Data Maven Builds

As an addendum to the previous answers -- there's a workaround I just discovered for if you can't or don't want to add all this boilerplate to your project POM. If you look in the following location:

{Eclipse_folder}/plugins/org.eclipse.m2e.lifecyclemapping.defaults_{m2e_version}

You should find a file called lifecycle-mapping-metadata.xml where you can make the same changes described in the other answers and in M2E plugin execution not covered.

LINQ select one field from list of DTO objects to array

You can select all Sku elements of your myLines list and then convert the result to an array.

string[] mySKUsArray = myLines.Select(x=>x.Sku).ToArray();

Database Diagram Support Objects cannot be Installed ... no valid owner

Enter "SA" instead of "sa" in the owner textbox. This worked for me.

Change Title of Javascript Alert

It's not possible, sorry. If really needed, you could use a jQuery plugin to have a custom alert.

How to work with progress indicator in flutter?

Step 1: Create Dialog

   showAlertDialog(BuildContext context){
      AlertDialog alert=AlertDialog(
        content: new Row(
            children: [
               CircularProgressIndicator(),
               Container(margin: EdgeInsets.only(left: 5),child:Text("Loading" )),
            ],),
      );
      showDialog(barrierDismissible: false,
        context:context,
        builder:(BuildContext context){
          return alert;
        },
      );
    }

Step 2:Call it

showAlertDialog(context);
await firebaseAuth.signInWithEmailAndPassword(email: email, password: password);
Navigator.pop(context);

Example With Dialog and login form

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:firebase_auth/firebase_auth.dart';
class DynamicLayout extends StatefulWidget{
  @override
  State<StatefulWidget> createState() {
    // TODO: implement createState
    return new MyWidget();
    }
  }
showAlertDialog(BuildContext context){
  AlertDialog alert=AlertDialog(
    content: new Row(
        children: [
           CircularProgressIndicator(),
           Container(margin: EdgeInsets.only(left: 5),child:Text("Loading" )),
        ],),
  );
  showDialog(barrierDismissible: false,
    context:context,
    builder:(BuildContext context){
      return alert;
    },
  );
}

  class MyWidget extends State<DynamicLayout>{
  Color color = Colors.indigoAccent;
  String title='app';
  GlobalKey<FormState> globalKey=GlobalKey<FormState>();
  String email,password;
  login() async{
   var currentState= globalKey.currentState;
   if(currentState.validate()){
        currentState.save();
        FirebaseAuth firebaseAuth=FirebaseAuth.instance;
        try {
          showAlertDialog(context);
          AuthResult authResult=await firebaseAuth.signInWithEmailAndPassword(
              email: email, password: password);
          FirebaseUser user=authResult.user;
          Navigator.pop(context);
        }catch(e){
          print(e);
        }
   }else{

   }
  }
  @override
  Widget build(BuildContext context) {
    return new Scaffold(
        appBar:AppBar(
        title: Text("$title"),
        ) ,
          body: Container(child: Form(
            key: globalKey,
            child: Container(
              padding: EdgeInsets.all(10),
              child: Column(children: <Widget>[
              TextFormField(decoration: InputDecoration(icon: Icon(Icons.email),labelText: 'Email'),
              // ignore: missing_return
              validator:(val){
                if(val.isEmpty)
                  return 'Please Enter Your Email';
              },
              onSaved:(val){
                email=val;
              },
              ),
                TextFormField(decoration: InputDecoration(icon: Icon(Icons.lock),labelText: 'Password'),
             obscureText: true,
                  // ignore: missing_return
                  validator:(val){
                    if(val.isEmpty)
                      return 'Please Enter Your Password';
                  },
                  onSaved:(val){
                    password=val;
                  },
              ),
                RaisedButton(color: Colors.lightBlue,textColor: Colors.white,child: Text('Login'),
                  onPressed:login),
            ],)
              ,),)
         ),
    );
  }
}

How can I remove the outline around hyperlinks images?

You can use the CSS property "outline" and value of "none" on the anchor element.

a {
outline: none;
}

Hope that helps.

Should a retrieval method return 'null' or throw an exception when it can't produce the return value?

It not containing the object can happen during normal operations and should be dealt with by the caller return NULL.

If not containing the object indicates a bug by the calling code or internal state then do an assert.

If not containing the object indicates an infrequent event. (Like someone deleted an item from the store while you were checking out the item at the same time.) Then throw an exception.

Call and receive output from Python script in Java?

First I would recommend to use ProcessBuilder ( since 1.5 )
Simple usage is described here
https://stackoverflow.com/a/14483787
For more complex example refer to
http://www.javaworld.com/article/2071275/core-java/when-runtime-exec---won-t.html

I've encountered problem when launching Python script from Java, script was producing too much output to standard out and everything went bad.

batch file to copy files to another location?

Open Notepad.

Type the following lines into it (obviously replace the folders with your ones)

@echo off
rem you could also remove the line above, because it might help you to see what happens

rem /i option is needed to avoid the batch file asking you whether destination folder is a file or a folder
rem /e option is needed to copy also all folders and subfolders
xcopy "c:\New Folder" "c:\Copy of New Folder" /i /e

Save the file as backup.bat (not .txt)

Double click on the file to run it. It will backup the folder and all its contents files/subfolders.

Now if you want the batch file to be run everytime you login in Windows, you should place it in Windows Startup menu. You find it under: Start > All Program > Startup To place the batch file in there either drag it into the Startup menu or RIGH click on the Windows START button and select Explore, go in Programs > Startup, and copy the batch file into there.

To run the batch file everytime the folder is updated you need an application, it can not be done with just a batch file.

How can one pull the (private) data of one's own Android app?

Here is what worked for me:

adb -d shell "run-as com.example.test cat /data/data/com.example.test/databases/data.db" > data.db

I'm printing the database directly into local file.

Android How to adjust layout in Full Screen Mode when softkeyboard is visible

I implemented Joseph Johnson solution and it worked well, I noticed after using this solution sometimes the drawer on the application will not close properly. I added a functionality to remove the listener removeOnGlobalLayoutListener when the user closes the fragment where are edittexts located.

    //when the application uses full screen theme and the keyboard is shown the content not scrollable! 
//with this util it will be scrollable once again
//http://stackoverflow.com/questions/7417123/android-how-to-adjust-layout-in-full-screen-mode-when-softkeyboard-is-visible
public class AndroidBug5497Workaround {


    private static AndroidBug5497Workaround mInstance = null;
    private View mChildOfContent;
    private int usableHeightPrevious;
    private FrameLayout.LayoutParams frameLayoutParams;
    private ViewTreeObserver.OnGlobalLayoutListener _globalListener;

    // For more information, see https://code.google.com/p/android/issues/detail?id=5497
    // To use this class, simply invoke assistActivity() on an Activity that already has its content view set.

    public static AndroidBug5497Workaround getInstance (Activity activity) {
        if(mInstance==null)
        {
            synchronized (AndroidBug5497Workaround.class)
            {
                mInstance = new AndroidBug5497Workaround(activity);
            }
        }
        return mInstance;
    }

    private AndroidBug5497Workaround(Activity activity) {
        FrameLayout content = (FrameLayout) activity.findViewById(android.R.id.content);
        mChildOfContent = content.getChildAt(0);
        frameLayoutParams = (FrameLayout.LayoutParams) mChildOfContent.getLayoutParams();

        _globalListener = new ViewTreeObserver.OnGlobalLayoutListener()
        {

            @Override
            public void onGlobalLayout()
            {
                 possiblyResizeChildOfContent();
            }
        };
    }

    public void setListener()
    {
         mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(_globalListener);
    }

    public void removeListener()
    {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
            mChildOfContent.getViewTreeObserver().removeOnGlobalLayoutListener(_globalListener);
        } else {
            mChildOfContent.getViewTreeObserver().removeGlobalOnLayoutListener(_globalListener);
        }
    }

    private void possiblyResizeChildOfContent() {
        int usableHeightNow = computeUsableHeight();
        if (usableHeightNow != usableHeightPrevious) {
            int usableHeightSansKeyboard = mChildOfContent.getRootView().getHeight();
            int heightDifference = usableHeightSansKeyboard - usableHeightNow;
            if (heightDifference > (usableHeightSansKeyboard/4)) {
                // keyboard probably just became visible
                frameLayoutParams.height = usableHeightSansKeyboard - heightDifference;
            } else {
                // keyboard probably just became hidden
                frameLayoutParams.height = usableHeightSansKeyboard;
            }
            mChildOfContent.requestLayout();
            usableHeightPrevious = usableHeightNow;
        }
    }

    private int computeUsableHeight() {
        Rect r = new Rect();
        mChildOfContent.getWindowVisibleDisplayFrame(r);
        return (r.bottom - r.top);
    } 
}

uses the class where is my edittexts located

@Override
public void onStart()
{
    super.onStart();
    AndroidBug5497Workaround.getInstance(getActivity()).setListener();
}

@Override
public void onStop()
{
    super.onStop();
    AndroidBug5497Workaround.getInstance(getActivity()).removeListener();
}

How to name variables on the fly?

FAQ says:

If you have

varname <- c("a", "b", "d")

you can do

get(varname[1]) + 2

for

a + 2

assign(varname[1], 2 + 2)

for

a <- 2 + 2

So it looks like you use GET when you want to evaluate a formula that uses a variable (such as a concatenate), and ASSIGN when you want to assign a value to a pre-declared variable.

Syntax for assign: assign(x, value)

x: a variable name, given as a character string. No coercion is done, and the first element of a character vector of length greater than one will be used, with a warning.

value: value to be assigned to x.

font awesome icon in select option

Full Sample and newer version:https://codepen.io/Nagibaba/pen/bagEgx

_x000D_

select {_x000D_
  font-family: 'FontAwesome', 'sans-serif';_x000D_
}