Is there a Public FTP server to test upload and download?

Try ftp://test.rebex.net/

It is read-only used for testing Rebex components to list directory and download. Allows also to test FTP/SSL and IMAP.

Username is "demo", password is "password"

See https://test.rebex.net/ for more information.

How to center the text in a JLabel?

String text = "In early March, the city of Topeka, Kansas," + "<br>" +
              "temporarily changed its name to Google..." + "<br>" + "<br>" +
              "...in an attempt to capture a spot" + "<br>" +
              "in Google's new broadband/fiber-optics project." + "<br>" + "<br>" +"<br>" +
              "source: http://en.wikipedia.org/wiki/Google_server#Oil_Tanker_Data_Center";
JLabel label = new JLabel("<html><div style='text-align: center;'>" + text + "</div></html>");

How can I pass a parameter to a t-sql script?

SQL*Plus uses &1, &2... &n to access the parameters.

Suppose you have the following script test.sql:

SET SERVEROUTPUT ON
SPOOL test.log
EXEC dbms_output.put_line('&1 &2');
SPOOL off

you could call this script like this for example:

$ sqlplus login/pw @test Hello World!

Edit:

In a UNIX script you would usually call a SQL script like this:

sqlplus /nolog << EOF
connect user/password@db
@test.sql Hello World!
exit
EOF

so that your login/password won't be visible with another session's ps

How to define two angular apps / modules in one page?

You can bootstrap multiple angular applications, but:

1) You need to manually bootstrap them

2) You should not use "document" as the root, but the node where the angular interface is contained to:

var todoRootNode = jQuery('[ng-controller=TodoController]');
angular.bootstrap(todoRootNode, ['TodoApp']);

This would be safe.

Check if a Windows service exists and delete in PowerShell

For single PC:

if (Get-Service "service_name" -ErrorAction 'SilentlyContinue'){(Get-WmiObject -Class Win32_Service -filter "Name='service_name'").delete()}

else{write-host "No service found."}

Macro for list of PCs:

$name = "service_name"

$list = get-content list.txt

foreach ($server in $list) {

if (Get-Service "service_name" -computername $server -ErrorAction 'SilentlyContinue'){
(Get-WmiObject -Class Win32_Service -filter "Name='service_name'" -ComputerName $server).delete()}

else{write-host "No service $name found on $server."}

}

Does React Native styles support gradients?

Here is a production ready pure JavaScript solution:

<View styles={{backgroundColor: `the main color you want`}}>
    <Image source={`A white to transparent gradient png`}>
</View>

Here is the source code of a npm package using this solution: https://github.com/flyskywhy/react-native-smooth-slider/blob/0f18a8bf02e2d436503b9a8ba241440247ef1c44/src/Slider.js#L329

Here is the gradient palette screenshot of saturation and brightness using this npm package: https://github.com/flyskywhy/react-native-slider-color-picker

How to get local server host and port in Spring Boot?

An easy workaround, at least to get the running port, is to add the parameter javax.servlet.HttpServletRequest in the signature of one of the controller's methods. Once you have the HttpServletRequest instance is straightforward to get the baseUrl with this: request.getRequestURL().toString()

Have a look at this code:

@PostMapping(value = "/registration" , produces = "application/json")
public StringResponse register(@RequestBody RequestUserDTO userDTO, 
    HttpServletRequest request) {
request.getRequestURL().toString();
//value: http://localhost:8080/registration
------
return "";
}

Laravel 5 Carbon format datetime

just use

Carbon::createFromFormat('Y-m-d H:i:s', $item['created_at'])->format('M d Y');

how to implement Interfaces in C++?

Interface are nothing but a pure abstract class in C++. Ideally this interface class should contain only pure virtual public methods and static const data. For example:

class InterfaceA
{
public:
  static const int X = 10;

  virtual void Foo() = 0;
  virtual int Get() const = 0;
  virtual inline ~InterfaceA() = 0;
};
InterfaceA::~InterfaceA () {}

opening a window form from another form programmatically

This might also help:

void ButtQuitClick(object sender, EventArgs e)
{
    QuitWin form = new QuitWin();
    form.Show();
}

Change ButtQuit to your button name and also change QuitWin to the name of the form that you made.

When the button is clicked it will open another window, you will need to make another form and a button on your main form for it to work.

error LNK2001: unresolved external symbol (C++)

That means that the definition of your function is not present in your program. You forgot to add that one.cpp to your program.

What "to add" means in this case depends on your build environment and its terminology. In MSVC (since you are apparently use MSVC) you'd have to add one.cpp to the project.

In more practical terms, applicable to all typical build methodologies, when you link you program, the object file created form one.cpp is missing.

How to edit Docker container files from the host?

docker run -it -name YOUR_NAME IMAGE_ID /bin/bash

$>vi path_to_file

AFNetworking Post Request

NSDictionary *params = [NSDictionary dictionaryWithObjectsAndKeys:
                       height, @"user[height]",
                       weight, @"user[weight]",
                       nil];

AFHTTPClient *client = [[AFHTTPClient alloc] initWithBaseURL:
                                             [NSURL URLWithString:@"http://localhost:8080/"]];

[client postPath:@"/mypage.php" parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) {
     NSString *text = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
     NSLog(@"Response: %@", text);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
     NSLog(@"%@", [error localizedDescription]);
}];

How to insert the current timestamp into MySQL database using a PHP insert query

Instead of NOW() you can use UNIX_TIMESTAMP() also:

$update_query = "UPDATE db.tablename 
                 SET insert_time=UNIX_TIMESTAMP()
                 WHERE username='$somename'";

Difference between UNIX_TIMESTAMP and NOW() in MySQL

Excel VBA select range at last row and column

Another simple way:

ActiveSheet.Rows(ActiveSheet.UsedRange.Rows.Count+1).Select    
Selection.EntireRow.Delete

or simpler:

ActiveSheet.Rows(ActiveSheet.UsedRange.Rows.Count+1).EntireRow.Delete

How can I save application settings in a Windows Forms application?

Sometimes you want to get rid of those settings kept in the traditional web.config or app.config file. You want more fine grained control over the deployment of your settings entries and separated data design. Or the requirement is to enable adding new entries at runtime.

I can imagine two good options:

The strongly typed version and
The object oriented version.

The advantage of the strongly typed version are the strongly typed settings names and values. There is no risk of intermixing names or data types. The disadvantage is that more settings have to be coded, cannot be added at runtime.

With the object oriented version the advantage is that new settings can be added at runtime. But you do not have strongly typed names and values. Must be careful with string identifiers. Must know data type saved earlier when getting a value.

You can find the code of both fully functional implementations HERE.

Add spaces between the characters of a string in Java?

This is the same problem as joining together an array with commas. This version correctly produces spaces only between characters, and avoids an unnecessary branch within the loop:

String input = "Hello";
StringBuilder result = new StringBuilder();
if (input.length() > 0) {
    result.append(input.charAt(0));
    for (int i = 1; i < input.length(); i++) {
        result.append(" ");
        result.append(input.charAt(i));
    }
}

Can't start Eclipse - Java was started but returned exit code=13

For me the solution was to go into (on Windows 8.1):

System > Advanced system setting > Environment Variables

Under 'System variables' in the 'Path' variable there was the following first:

C:\ProgramData\Oracle\Java\javapath;

I removed this and Eclipse worked again!

Basic example of using .ajax() with JSONP?

In response to the OP, there are two problems with your code: you need to set jsonp='callback', and adding in a callback function in a variable like you did does not seem to work.

Update: when I wrote this the Twitter API was just open, but they changed it and it now requires authentication. I changed the second example to a working (2014Q1) example, but now using github.

This does not work any more - as an exercise, see if you can replace it with the Github API:

$('document').ready(function() {
    var pm_url = 'http://twitter.com/status';
    pm_url += '/user_timeline/stephenfry.json';
    pm_url += '?count=10&callback=photos';
    $.ajax({
        url: pm_url,
        dataType: 'jsonp',
        jsonpCallback: 'photos',
        jsonp: 'callback',
    });
});
function photos (data) {
    alert(data);
    console.log(data);
};

although alert()ing an array like that does not really work well... The "Net" tab in Firebug will show you the JSON properly. Another handy trick is doing

alert(JSON.stringify(data));

You can also use the jQuery.getJSON method. Here's a complete html example that gets a list of "gists" from github. This way it creates a randomly named callback function for you, that's the final "callback=?" in the url.

<!DOCTYPE html>
<html lang="en">
    <head>
        <title>JQuery (cross-domain) JSONP Twitter example</title>
        <script type="text/javascript"src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.min.js"></script>
        <script>
            $(document).ready(function(){
                $.getJSON('https://api.github.com/gists?callback=?', function(response){
                    $.each(response.data, function(i, gist){
                        $('#gists').append('<li>' + gist.user.login + " (<a href='" + gist.html_url + "'>" + 
                            (gist.description == "" ? "undescribed" : gist.description) + '</a>)</li>');
                    });
                });
            });
        </script>
    </head>
    <body>
        <ul id="gists"></ul>
    </body>
</html>

How to Execute SQL Script File in Java?

No, you must read the file, split it into separate queries and then execute them individually (or using the batch API of JDBC).

One of the reasons is that every database defines their own way to separate SQL statements (some use ;, others /, some allow both or even to define your own separator).

In Java 8 how do I transform a Map<K,V> to another Map<K,V> using a lambda?

Keep it Simple and use Java 8:-

 Map<String, AccountGroupMappingModel> mapAccountGroup=CustomerDAO.getAccountGroupMapping();
 Map<String, AccountGroupMappingModel> mapH2ToBydAccountGroups = 
              mapAccountGroup.entrySet().stream()
                         .collect(Collectors.toMap(e->e.getValue().getH2AccountGroup(),
                                                   e ->e.getValue())
                                  );

Chrome extension id - how to find it

You get an extension ID when you upload your extension to Google Web Store. Ie. Adblock has URL https://chrome.google.com/webstore/detail/cfhdojbkjhnklbpkdaibdccddilifddb and the last part of this URL is its extension ID cfhdojbkjhnklbpkdaibdccddilifddb.

If you wish to read installed extension IDs from your extension, check out the managment module. chrome.management.getAll allows to fetch information about all installed extensions.

Convert DataSet to List

                DataSet ds = new DataSet();
                ds = obj.getXmlData();// get the multiple table in dataset.

                Employee objEmp = new Employee ();// create the object of class Employee 
                List<Employee > empList = new List<Employee >();
                int table = Convert.ToInt32(ds.Tables.Count);// count the number of table in dataset
                for (int i = 1; i < table; i++)// set the table value in list one by one
                {
                    foreach (DataRow dr in ds.Tables[i].Rows)
                    {
                        empList.Add(new Employee { Title1 = Convert.ToString(dr["Title"]), Hosting1 = Convert.ToString(dr["Hosting"]), Startdate1 = Convert.ToString(dr["Startdate"]), ExpDate1 = Convert.ToString(dr["ExpDate"]) });
                    }
                }
                dataGridView1.DataSource = empList;

enter image description here

error: ‘NULL’ was not declared in this scope

NULL isn't a keyword; it's a macro substitution for 0, and comes in stddef.h or cstddef, I believe. You haven't #included an appropriate header file, so g++ sees NULL as a regular variable name, and you haven't declared it.

How to redirect in a servlet filter?

In Filter the response is of ServletResponse rather than HttpServletResponse. Hence do the cast to HttpServletResponse.

HttpServletResponse httpResponse = (HttpServletResponse) response;
httpResponse.sendRedirect("/login.jsp");

If using a context path:

httpResponse.sendRedirect(req.getContextPath() + "/login.jsp");

Also don't forget to call return; at the end.

Cannot ignore .idea/workspace.xml - keeps popping up

Ignore the files ending with .iws, and the workspace.xml and tasks.xml files in your .gitignore Reference

Changing WPF title bar background color

Here's an example on how to achieve this:

    <Grid DockPanel.Dock="Right"
      HorizontalAlignment="Right">

        <StackPanel Orientation="Horizontal"
                HorizontalAlignment="Right"
                VerticalAlignment="Center">

            <Button x:Name="MinimizeButton"
                KeyboardNavigation.IsTabStop="False"
                Click="MinimizeWindow"
                Style="{StaticResource MinimizeButton}" 
                Template="{StaticResource MinimizeButtonControlTemplate}" />

            <Button x:Name="MaximizeButton"
                KeyboardNavigation.IsTabStop="False"
                Click="MaximizeClick"
                Style="{DynamicResource MaximizeButton}" 
                Template="{DynamicResource MaximizeButtonControlTemplate}" />

            <Button x:Name="CloseButton"
                KeyboardNavigation.IsTabStop="False"
                Command="{Binding ApplicationCommands.Close}"
                Style="{DynamicResource CloseButton}" 
                Template="{DynamicResource CloseButtonControlTemplate}"/>

        </StackPanel>
    </Grid>
</DockPanel>

Handle Click Events in the code-behind.

For MouseDown -

App.Current.MainWindow.DragMove();

For Minimize Button -

App.Current.MainWindow.WindowState = WindowState.Minimized;

For DoubleClick and MaximizeClick

if (App.Current.MainWindow.WindowState == WindowState.Maximized)
{
    App.Current.MainWindow.WindowState = WindowState.Normal;
}
else if (App.Current.MainWindow.WindowState == WindowState.Normal)
{
    App.Current.MainWindow.WindowState = WindowState.Maximized;
}

Get array elements from index to end

The [:-1] removes the last element. Instead of

a[3:-1]

write

a[3:]

You can read up on Python slicing notation here: Explain Python's slice notation

NumPy slicing is an extension of that. The NumPy tutorial has some coverage: Indexing, Slicing and Iterating.

How to get the next auto-increment id in mysql

In PHP you can try this:

$query = mysql_query("SELECT MAX(id) FROM `your_table_name`");
$results = mysql_fetch_array($query);
$cur_auto_id = $results['MAX(id)'] + 1;

$result = mysql_query("SHOW TABLE STATUS WHERE `Name` = 'your_table_name'");
$data = mysql_fetch_assoc($result);
$next_increment = $data['Auto_increment'];

Super-simple example of C# observer/observable with delegates

Applying the Observer Pattern with delegates and events in c# is named "Event Pattern" according to MSDN which is a slight variation.

In this Article you will find well structured examples of how to apply the pattern in c# both the classic way and using delegates and events.

Exploring the Observer Design Pattern

public class Stock
{

    //declare a delegate for the event
    public delegate void AskPriceChangedHandler(object sender,
          AskPriceChangedEventArgs e);
    //declare the event using the delegate
    public event AskPriceChangedHandler AskPriceChanged;

    //instance variable for ask price
    object _askPrice;

    //property for ask price
    public object AskPrice
    {

        set
        {
            //set the instance variable
            _askPrice = value;

            //fire the event
            OnAskPriceChanged();
        }

    }//AskPrice property

    //method to fire event delegate with proper name
    protected void OnAskPriceChanged()
    {

        AskPriceChanged(this, new AskPriceChangedEventArgs(_askPrice));

    }//AskPriceChanged

}//Stock class

//specialized event class for the askpricechanged event
public class AskPriceChangedEventArgs : EventArgs
{

    //instance variable to store the ask price
    private object _askPrice;

    //constructor that sets askprice
    public AskPriceChangedEventArgs(object askPrice) { _askPrice = askPrice; }

    //public property for the ask price
    public object AskPrice { get { return _askPrice; } }

}//AskPriceChangedEventArgs

Use of Custom Data Types in VBA

It looks like you want to define Truck as a Class with properties NumberOfAxles, AxleWeights & AxleSpacings.

This can be defined in a CLASS MODULE (here named clsTrucks)

Option Explicit

Private tID As String
Private tNumberOfAxles As Double
Private tAxleSpacings As Double


Public Property Get truckID() As String
    truckID = tID
End Property

Public Property Let truckID(value As String)
    tID = value
End Property

Public Property Get truckNumberOfAxles() As Double
    truckNumberOfAxles = tNumberOfAxles
End Property

Public Property Let truckNumberOfAxles(value As Double)
    tNumberOfAxles = value
End Property

Public Property Get truckAxleSpacings() As Double
    truckAxleSpacings = tAxleSpacings
End Property

Public Property Let truckAxleSpacings(value As Double)
    tAxleSpacings = value
End Property

then in a MODULE the following defines a new truck and it's properties and adds it to a collection of trucks and then retrieves the collection.

Option Explicit

Public TruckCollection As New Collection

Sub DefineNewTruck()
Dim tempTruck As clsTrucks
Dim i As Long

    'Add 5 trucks
    For i = 1 To 5
        Set tempTruck = New clsTrucks
        'Random data
        tempTruck.truckID = "Truck" & i
        tempTruck.truckAxleSpacings = 13.5 + i
        tempTruck.truckNumberOfAxles = 20.5 + i

        'tempTruck.truckID is the collection key
        TruckCollection.Add tempTruck, tempTruck.truckID
    Next i

    'retrieve 5 trucks
    For i = 1 To 5
        'retrieve by collection index
        Debug.Print TruckCollection(i).truckAxleSpacings
        'retrieve by key
        Debug.Print TruckCollection("Truck" & i).truckAxleSpacings

    Next i

End Sub

There are several ways of doing this so it really depends on how you intend to use the data as to whether an a class/collection is the best setup or arrays/dictionaries etc.

SASS - use variables across multiple files

You can do it like this:

I have a folder named utilities and inside that I have a file named _variables.scss

in that file i declare variables like so:

$black: #000;
$white: #fff;

then I have the style.scss file in which i import all of my other scss files like this:

// Utilities
@import "utilities/variables";

// Base Rules
@import "base/normalize";
@import "base/global";

then, within any of the files I have imported, I should be able to access the variables I have declared.

Just make sure you import the variable file before any of the others you would like to use it in.

Detect rotation of Android phone in the browser with JavaScript

You could always listen to the window resize event. If, on that event, the window went from being taller than it is wide to wider than it is tall (or vice versa), you can be pretty sure the phone orientation was just changed.

Add table row in jQuery

TIP: Inserting rows in html table via innerHTML or .html() is not valid in some browsers (similar IE9), and using .append("<tr></tr>") is not good suggestion in any browser. best and fastest way is using the pure javascript codes.

for combine this way with jQuery, only add new plugin similar this to jQuery:

$.fn.addRow=function(index/*-1: add to end  or  any desired index*/, cellsCount/*optional*/){
    if(this[0].tagName.toLowerCase()!="table") return null;
    var i=0, c, r = this[0].insertRow((index<0||index>this[0].rows.length)?this[0].rows.length:index);
    for(;i<cellsCount||0;i++) c = r.insertCell(); //you can use c for set its content or etc
    return $(r);
};

And now use it in whole the project similar this:

var addedRow = $("#myTable").addRow(-1/*add to end*/, 2);

Merging multiple PDFs using iTextSharp in c#.net

I found the answer:

Instead of the 2nd Method, add more files to the first array of input files.

public static void CombineMultiplePDFs(string[] fileNames, string outFile)
{
    // step 1: creation of a document-object
    Document document = new Document();
    //create newFileStream object which will be disposed at the end
    using (FileStream newFileStream = new FileStream(outFile, FileMode.Create))
    {
       // step 2: we create a writer that listens to the document
       PdfCopy writer = new PdfCopy(document, newFileStream );
       if (writer == null)
       {
           return;
       }

       // step 3: we open the document
       document.Open();

       foreach (string fileName in fileNames)
       {
           // we create a reader for a certain document
           PdfReader reader = new PdfReader(fileName);
           reader.ConsolidateNamedDestinations();

           // step 4: we add content
           for (int i = 1; i <= reader.NumberOfPages; i++)
           {                
               PdfImportedPage page = writer.GetImportedPage(reader, i);
               writer.AddPage(page);
           }

           PRAcroForm form = reader.AcroForm;
           if (form != null)
           {
               writer.CopyAcroForm(reader);
           }

           reader.Close();
       }

       // step 5: we close the document and writer
       writer.Close();
       document.Close();
   }//disposes the newFileStream object
}

Escape double quotes in parameter

The 2nd document quoted by Peter Mortensen in his comment on the answer of Codesmith made things much clearer for me. That document was written by windowsinspired.com. The link repeated: A Better Way To Understand Quoting and Escaping of Windows Command Line Arguments.

Some further trial and error leads to the following guideline:

Escape every double quote " with a caret ^. If you want other characters with special meaning to the Windows command shell (e.g., <, >, |, &) to be interpreted as regular characters instead, then escape them with a caret, too.

If you want your program foo to receive the command line text "a\"b c" > d and redirect its output to file out.txt, then start your program as follows from the Windows command shell:

foo ^"a\^"b c^" ^> d > out.txt

If foo interprets \" as a literal double quote and expects unescaped double quotes to delimit arguments that include whitespace, then foo interprets the command as specifying one argument a"b c, one argument >, and one argument d.

If instead foo interprets a doubled double quote "" as a literal double quote, then start your program as

foo ^"a^"^"b c^" ^> d > out.txt

The key insight from the quoted document is that, to the Windows command shell, an unescaped double quote triggers switching between two possible states.

Some further trial and error implies that in the initial state, redirection (to a file or pipe) is recognized and a caret ^ escapes a double quote and the caret is removed from the input. In the other state, redirection is not recognized and a caret does not escape a double quote and isn't removed. Let's refer to these states as 'outside' and 'inside', respectively.

If you want to redirect the output of your command, then the command shell must be in the outside state when it reaches the redirection, so there must be an even number of unescaped (by caret) double quotes preceding the redirection. foo "a\"b " > out.txt won't work -- the command shell passes the entire "a\"b " > out.txt to foo as its combined command line arguments, instead of passing only "a\"b " and redirecting the output to out.txt.

foo "a\^"b " > out.txt won't work, either, because the caret ^ is encountered in the inside state where it is an ordinary character and not an escape character, so "a\^"b " > out.txt gets passed to foo.

The only way that (hopefully) always works is to keep the command shell always in the outside state, because then redirection works.

If you don't need redirection (or other characters with special meaning to the command shell), then you can do without the carets. If foo interprets \" as a literal double quote, then you can call it as

foo "a\"b c"

Then foo receives "a\"b c" as its combined arguments text and can interpret it as a single argument equal to a"b c.

Now -- finally -- to the original question. myscript '"test"' called from the Windows command shell passes '"test"' to myscript. Apparently myscript interprets the single and double quotes as argument delimiters and removes them. You need to figure out what myscript accepts as a literal double quote and then specify that in your command, using ^ to escape any characters that have special meaning to the Windows command shell. Given that myscript is also available on Unix, perhaps \" does the trick. Try

myscript \^"test\^"

or, if you don't need redirection,

myscript \"test\"

Can I access a form in the controller?

To be able to access the form in your controller, you have to add it to a dummy scope object.

Something like $scope.dummy = {}

For your situation this would mean something like:

<form name="dummy.customerForm">

In your controller you will be able to access the form by:

$scope.dummy.customerForm

and you will be able to do stuff like

$scope.dummy.customerForm.$setPristine()

WIKI LINK

Having a '.' in your models will ensure that prototypal inheritance is in play. So, use <input type="text" ng-model="someObj.prop1"> rather than <input type="text" ng-model="prop1">

If you really want/need to use a primitive, there are two workarounds:

1.Use $parent.parentScopeProperty in the child scope. This will prevent the child scope from creating its own property. 2.Define a function on the parent scope, and call it from the child, passing the primitive value up to the parent (not always possible)

java.lang.OutOfMemoryError: Java heap space

You can get your heap memory size through below programe.

public class GetHeapSize {
    public static void main(String[] args) {
        long heapsize = Runtime.getRuntime().totalMemory();
        System.out.println("heapsize is :: " + heapsize);
    }
}

then accordingly you can increase heap size also by using: java -Xmx2g http://www.oracle.com/technetwork/java/javase/tech/vmoptions-jsp-140102.html

How to add element in List while iterating in java?

Iterate through a copy of the list and add new elements to the original list.

for (String s : new ArrayList<String>(list))     
{
    list.add("u");
}

See How to make a copy of ArrayList object which is type of List?

Query based on multiple where clauses in Firebase

var ref = new Firebase('https://your.firebaseio.com/');

Query query = ref.orderByChild('genre').equalTo('comedy');
query.addValueEventListener(new ValueEventListener() {
    @Override
    public void onDataChange(DataSnapshot dataSnapshot) {
        for (DataSnapshot movieSnapshot : dataSnapshot.getChildren()) {
            Movie movie = dataSnapshot.getValue(Movie.class);
            if (movie.getLead().equals('Jack Nicholson')) {
                console.log(movieSnapshot.getKey());
            }
        }
    }

    @Override
    public void onCancelled(FirebaseError firebaseError) {

    }
});

How do I concatenate two lists in Python?

Python >= 3.5 alternative: [*l1, *l2]

Another alternative has been introduced via the acceptance of PEP 448 which deserves mentioning.

The PEP, titled Additional Unpacking Generalizations, generally reduced some syntactic restrictions when using the starred * expression in Python; with it, joining two lists (applies to any iterable) can now also be done with:

>>> l1 = [1, 2, 3]
>>> l2 = [4, 5, 6]
>>> joined_list = [*l1, *l2]  # unpack both iterables in a list literal
>>> print(joined_list)
[1, 2, 3, 4, 5, 6]

This functionality was defined for Python 3.5 it hasn't been backported to previous versions in the 3.x family. In unsupported versions a SyntaxError is going to be raised.

As with the other approaches, this too creates as shallow copy of the elements in the corresponding lists.

The upside to this approach is that you really don't need lists in order to perform it, anything that is iterable will do. As stated in the PEP:

This is also useful as a more readable way of summing iterables into a list, such as my_list + list(my_tuple) + list(my_range) which is now equivalent to just [*my_list, *my_tuple, *my_range].

So while addition with + would raise a TypeError due to type mismatch:

l = [1, 2, 3]
r = range(4, 7)
res = l + r

The following won't:

res = [*l, *r]

because it will first unpack the contents of the iterables and then simply create a list from the contents.

org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'customerService' is defined

You will have to annotate your service with @Service since you have said I am using annotations for mapping

Can "list_display" in a Django ModelAdmin display attributes of ForeignKey fields?

This one's already accepted, but if there are any other dummies out there (like me) that didn't immediately get it from the presently accepted answer, here's a bit more detail.

The model class referenced by the ForeignKey needs to have a __unicode__ method within it, like here:

class Category(models.Model):
    name = models.CharField(max_length=50)

    def __unicode__(self):
        return self.name

That made the difference for me, and should apply to the above scenario. This works on Django 1.0.2.

How to make a new line or tab in <string> XML (eclipse/android)?

Use \n for a line break and \t if you want to insert a tab.

You can also use some XML tags for basic formatting: <b> for bold text, <i> for italics, and <u> for underlined text

More info:

https://developer.android.com/guide/topics/resources/string-resource.html

Unable to negotiate with XX.XXX.XX.XX: no matching host key type found. Their offer: ssh-dss

If you're like me, and would rather not make this security hole system or user-wide, then you can add a config option to any git repos that need this by running this command in those repos. (note only works with git version >= 2.10, released 2016-09-04)

git config core.sshCommand 'ssh -oHostKeyAlgorithms=+ssh-dss'

This only works after the repo is setup however. If you're not comfortable adding a remote manually (and just want to clone) then you can run the clone like this:

GIT_SSH_COMMAND='ssh -oHostKeyAlgorithms=+ssh-dss' git clone ssh://user@host/path-to-repository

then run the first command to make it permanent.

If you don't have the latest, and still would like to keep the hole as local as possible I recommend putting

export GIT_SSH_COMMAND='ssh -oHostKeyAlgorithms=+ssh-dss'

in a file somewhere, say git_ssh_allow_dsa_keys.sh, and sourceing it when needed.

How to kill a process in MacOS?

I just now searched for this as I'm in a similar situation, and instead of kill -9 698 I tried sudo kill 428 where 428 was the pid of the process I'm trying to kill. It worked cleanly for me, in the absence of the hyphen '-' character. I hope it helps!

How to find the .NET framework version of a Visual Studio project?

The simplest way to find the framework version of the current .NET project is:

Right-click on the project and go to "Properties."
In the first tab, "Application," you can see the target framework this project is using.

How to download files using axios

For axios POST request, the request should be something like this: The key here is that the responseType and header fields must be in the 3rd parameter of Post. The 2nd parameter is the application parameters.

export const requestDownloadReport = (requestParams) => async dispatch => { 
  let response = null;
  try {
    response = await frontEndApi.post('createPdf', {
      requestParams: requestParams,
    },
    {
      responseType: 'arraybuffer', // important...because we need to convert it to a blob. If we don't specify this, response.data will be the raw data. It cannot be converted to blob directly.
      headers: {
          'Content-Type': 'application/json',
          'Accept': 'application/pdf'
      }
  });          
  }
  catch(err) {
    console.log('[requestDownloadReport][ERROR]', err);
    return err
  }

  return response;
}

Python datetime strptime() and strftime(): how to preserve the timezone information

Part of the problem here is that the strings usually used to represent timezones are not actually unique. "EST" only means "America/New_York" to people in North America. This is a limitation in the C time API, and the Python solution is… to add full tz features in some future version any day now, if anyone is willing to write the PEP.

You can format and parse a timezone as an offset, but that loses daylight savings/summer time information (e.g., you can't distinguish "America/Phoenix" from "America/Los_Angeles" in the summer). You can format a timezone as a 3-letter abbreviation, but you can't parse it back from that.

If you want something that's fuzzy and ambiguous but usually what you want, you need a third-party library like dateutil.

If you want something that's actually unambiguous, just append the actual tz name to the local datetime string yourself, and split it back off on the other end:

d = datetime.datetime.now(pytz.timezone("America/New_York"))
dtz_string = d.strftime(fmt) + ' ' + "America/New_York"

d_string, tz_string = dtz_string.rsplit(' ', 1)
d2 = datetime.datetime.strptime(d_string, fmt)
tz2 = pytz.timezone(tz_string)

print dtz_string 
print d2.strftime(fmt) + ' ' + tz_string

Or… halfway between those two, you're already using the pytz library, which can parse (according to some arbitrary but well-defined disambiguation rules) formats like "EST". So, if you really want to, you can leave the %Z in on the formatting side, then pull it off and parse it with pytz.timezone() before passing the rest to strptime.

How to set width of a div in percent in JavaScript?

testjs2

    $(document).ready(function() { 
      $("#form1").validate({ 
        rules: { 
          name: "required", //simple rule, converted to {required:true} 
          email: { //compound rule 
          required: true, 
          email: true 
        }, 
        url: { 
          url: true 
        }, 
        comment: { 
          required: true 
        } 
        }, 
        messages: { 
          comment: "Please enter a comment." 
        } 
      }); 
    }); 

    function()
    {
    var ok=confirm('Click "OK" to go to yahoo, "CANCEL" to go to hotmail')
    if (ok)
    location="http://www.yahoo.com"
    else
    location="http://www.hotmail.com"
    }

    function changeWidth(){
    var e1 = document.getElementById("e1");
    e1.style.width = 400;
} 

  </script> 

  <style type="text/css"> 
    * { font-family: Verdana; font-size: 11px; line-height: 14px; } 
    .submit { margin-left: 125px; margin-top: 10px;} 
    .label { display: block; float: left; width: 120px; text-align: right; margin-right: 5px; } 
    .form-row { padding: 5px 0; clear: both; width: 700px; } 
    .label.error { width: 250px; display: block; float: left; color: red; padding-left: 10px; } 
    .input[type=text], textarea { width: 250px; float: left; } 
    .textarea { height: 50px; } 
  </style> 

  </head> 
  <body> 

    <form id="form1" method="post" action=""> 
      <div class="form-row"><span class="label">Name *</span><input type="text" name="name" /></div> 
      <div class="form-row"><span class="label">E-Mail *</span><input type="text" name="email" /></div> 
      <div class="form-row"><span class="label">URL </span><input type="text" name="url" /></div> 
      <div class="form-row"><span class="label">Your comment *</span><textarea name="comment" ></textarea></div> 
      <div class="form-row"><input class="submit" type="submit" value="Submit"></div> 
      <input type="button" value="change width" onclick="changeWidth()"/>
      <div id="e1" style="width:20px;height:20px; background-color:#096"></div>
    </form> 



  </body> 
</html>

Checkout old commit and make it a new commit

This is exactly what I wanted to do. I was not sure of the previous command git cherry-pick C, it sounds nice but it seems you do this to get changes from another branch but not on same branch, has anyone tried it?

So I did something else which also worked : I got the files I wanted back from the old commit file by file

git checkout <commit-hash> <filename>

ex : git checkout 08a6497b76ad098a5f7eda3e4ec89e8032a4da51 file.css

-> this takes the files as they were from the old commit

Then I did my changes. And I committed again.

git status (to check which files were modified)
git diff (to check the changes you made)
git add .
git commit -m "my message"

I checked my history with git log, and I still have my history along with my new changes made from the old files. And I could push too.

Note that to go back to the state you want you need to put the hash of the commit before the unwanted changes. Also make sure you don't have uncommitted changes before you do that.

Create hive table using "as select" or "like" and also specify delimiter

Let's say we have an external table called employee

hive> SHOW CREATE TABLE employee;
OK
CREATE EXTERNAL TABLE employee(
  id string,
  fname string,
  lname string, 
  salary double)
ROW FORMAT SERDE
  'org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe'
WITH SERDEPROPERTIES (
  'colelction.delim'=':',
  'field.delim'=',',
  'line.delim'='\n',
  'serialization.format'=',')
STORED AS INPUTFORMAT
  'org.apache.hadoop.mapred.TextInputFormat'
OUTPUTFORMAT
  'org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat'
LOCATION
  'maprfs:/user/hadoop/data/employee'
TBLPROPERTIES (
  'COLUMN_STATS_ACCURATE'='false',
  'numFiles'='0',
  'numRows'='-1',
  'rawDataSize'='-1',
  'totalSize'='0',
  'transient_lastDdlTime'='1487884795')

To create a person table like employee

CREATE TABLE person LIKE employee;
To create a person external table like employee

CREATE TABLE person LIKE employee LOCATION 'maprfs:/user/hadoop/data/person';
then use DESC person; to see the newly created table schema.

Sending POST data without form

Simply use: file_get_contents()

// building array of variables
$content = http_build_query(array(
            'username' => 'value',
            'password' => 'value'
            ));
// creating the context change POST to GET if that is relevant 
$context = stream_context_create(array(
            'http' => array(
                'method' => 'POST',
                'content' => $content, )));

$result = file_get_contents('http://www.example.com/page.php', null, $context);
//dumping the reuslt
var_dump($result);

Reference: my answer to a similar question:

BATCH file asks for file or folder

The /i switch might be what your after.

From xcopy /?

/I If destination does not exist and copying more than one file, assumes that destination must be a directory.

How to convert a String to Bytearray

I suppose C# and Java produce equal byte arrays. If you have non-ASCII characters, it's not enough to add an additional 0. My example contains a few special characters:

var str = "Hell ö € O ";
var bytes = [];
var charCode;

for (var i = 0; i < str.length; ++i)
{
    charCode = str.charCodeAt(i);
    bytes.push((charCode & 0xFF00) >> 8);
    bytes.push(charCode & 0xFF);
}

alert(bytes.join(' '));
// 0 72 0 101 0 108 0 108 0 32 0 246 0 32 32 172 0 32 3 169 0 32 216 52 221 30

I don't know if C# places BOM (Byte Order Marks), but if using UTF-16, Java String.getBytes adds following bytes: 254 255.

String s = "Hell ö € O ";
// now add a character outside the BMP (Basic Multilingual Plane)
// we take the violin-symbol (U+1D11E) MUSICAL SYMBOL G CLEF
s += new String(Character.toChars(0x1D11E));
// surrogate codepoints are: d834, dd1e, so one could also write "\ud834\udd1e"

byte[] bytes = s.getBytes("UTF-16");
for (byte aByte : bytes) {
    System.out.print((0xFF & aByte) + " ");
}
// 254 255 0 72 0 101 0 108 0 108 0 32 0 246 0 32 32 172 0 32 3 169 0 32 216 52 221 30

Edit:

Added a special character (U+1D11E) MUSICAL SYMBOL G CLEF (outside BPM, so taking not only 2 bytes in UTF-16, but 4.

Current JavaScript versions use "UCS-2" internally, so this symbol takes the space of 2 normal characters.

I'm not sure but when using charCodeAt it seems we get exactly the surrogate codepoints also used in UTF-16, so non-BPM characters are handled correctly.

This problem is absolutely non-trivial. It might depend on the used JavaScript versions and engines. So if you want reliable solutions, you should have a look at:

https://github.com/koichik/node-codepoint/
http://mathiasbynens.be/notes/javascript-escapes
Mozilla Developer Network: charCodeAt
BigEndian vs. LittleEndian

How do I change a single value in a data.frame?

To change a cell value using a column name, one can use

iris$Sepal.Length[3]=999

Tomcat: LifecycleException when deploying

I got out of memory error with when facing such phenomena:

Caused by: java.lang.OutOfMemoryError: PermGen space

after freeing some memory, the problem is solved.

How do I redirect users after submit button click?

// similar behavior as an HTTP redirect
window.location.replace("http://stackoverflow.com/SpecificAction.php");

// similar behavior as clicking on a link
window.location.href = "http://stackoverflow.com/SpecificAction.php";

Get a list of URLs from a site

wget from a linux box might also be a good option as there are switches to spider and change it's output.

EDIT: wget is also available on Windows: http://gnuwin32.sourceforge.net/packages/wget.htm

Unit testing with mockito for constructors

Include this line on top of your test class

@PrepareForTest({ First.class })

How to pass html string to webview on android

I was using some buttons with some events, converted image file coming from server. Loading normal data wasn't working for me, converting into Base64 working just fine.

String unencodedHtml ="<html><body>'%28' is the code for '('</body></html>";
tring encodedHtml = Base64.encodeToString(unencodedHtml.getBytes(), Base64.NO_PADDING);
webView.loadData(encodedHtml, "text/html", "base64");

Find details on WebView

Auto-Submit Form using JavaScript

Try this,

HtmlElement head = _windowManager.ActiveBrowser.Document.GetElementsByTagName("head")[0];
HtmlElement scriptEl = _windowManager.ActiveBrowser.Document.CreateElement("script");
IHTMLScriptElement element = (IHTMLScriptElement)scriptEl.DomElement;
element.text = "window.onload = function() { document.forms[0].submit(); }";
head.AppendChild(scriptEl);
strAdditionalHeader = "";
_windowManager.ActiveBrowser.Document.InvokeScript("webBrowserControl");

Creating a Jenkins environment variable using Groovy

You can also define a variable without the EnvInject Plugin within your Groovy System Script:

import hudson.model.*
def build = Thread.currentThread().executable
def pa = new ParametersAction([
  new StringParameterValue("FOO", "BAR")
])
build.addAction(pa)

Then you can access this variable in the next build step which (for example) is an windows batch command:

@echo off
Setlocal EnableDelayedExpansion
echo FOO=!FOO!

This echo will show you "FOO=BAR".

Regards

Laravel 5.2 not reading env file

For me it has worked this in this order:

php artisan config:cache
php artisan config:clear
php artisan cache:clear

And I've tried all the rests without luck.

Functions that return a function

Snippet one:

function a() {
  
    alert('A!');

    function b(){
        alert('B!'); 
    }

    return b(); //return nothing here as b not defined a return value
}

var s = a(); //s got nothing assigned as b() and thus a() return nothing.
alert('break');
s(); // s equals nothing so nothing will be executed, JavaScript interpreter will complain

the statement 'b()' means to execute the function named 'b' which shows a dialog box with text 'B!'

the statement 'return b();' means to execute a function named 'b' and then return what function 'b' return. but 'b' returns nothing, then this statement 'return b()' returns nothing either. If b() return a number, then ‘return b()’ is a number too.

Now ‘s’ is assigned the value of what 'a()' return, which returns 'b()', which is nothing, so 's' is nothing (in JavaScript it’s a thing actually, it's an 'undefined'. So when you ask JavaScript to interpret what data type the 's' is, JavaScript interpreter will tell you 's' is an undefined.) As 's' is an undefined, when you ask JavaScript to execute this statement 's()', you're asking JavaScript to execute a function named as 's', but 's' here is an 'undefined', not a function, so JavaScript will complain, "hey, s is not a function, I don't know how to do with this s", then a "Uncaught TypeError: s is not a function" error message will be shown by JavaScript (tested in Firefox and Chrome)

Snippet Two

function a() {
  
    alert('A!');

    function b(){
        alert('B!'); 
    }

    return b; //return pointer to function b here
}

var s = a();  //s get the value of pointer to b
alert('break');
s(); // b() function is executed

now, function 'a' returning a pointer/alias to a function named 'b'. so when execute 's=a()', 's' will get a value pointing to b, i.e. 's' is an alias of 'b' now, calling 's' equals calling 'b'. i.e. 's' is a function now. Execute 's()' means to run function 'b' (same as executing 'b()'), a dialog box showing 'B!' will appeared (i.e. running the 'alert('B!'); statement in the function 'b')

android set button background programmatically

Further from @finnmglas, the Java answer as of 2021 is:

    if (Build.VERSION.SDK_INT >= 29)
        btn.getBackground().setColorFilter(new BlendModeColorFilter(color, BlendMode.MULTIPLY));
    else
        btn.getBackground().setColorFilter(color, PorterDuff.Mode.MULTIPLY);

How can I send the "&" (ampersand) character via AJAX?

You could encode your string using Base64 encoding on the JavaScript side and then decoding it on the server side with PHP (?).

JavaScript (Docu)

var wysiwyg_clean = window.btoa( wysiwyg );

PHP (Docu):

var wysiwyg = base64_decode( $_POST['wysiwyg'] );

Android, ListView IllegalStateException: "The content of the adapter has changed but ListView did not receive a notification"

I have a List if Feed objects. It's appended and truncated from none-UI thread. It works fine with adapter below. I call FeedAdapter.notifyDataSetChanged in UI thread anyway but little bit later. I do like this because my Feed objects stay in memory in Local Service even when UI is dead.

public class FeedAdapter extends BaseAdapter {
    private int size = 0;
    private final List<Feed> objects;

    public FeedAdapter(Activity context, List<Feed> objects) {
        this.context = context;
        this.objects = objects;
        size = objects.size();
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        ...
    }

    @Override
    public void notifyDataSetChanged() {
        size = objects.size();

        super.notifyDataSetChanged();
    }

    @Override
    public int getCount() {
        return size;
    }

    @Override
    public Object getItem(int position) {
        try {
            return objects.get(position);
        } catch (Error e) {
            return Feed.emptyFeed;
        }
    }

    @Override
    public long getItemId(int position) {
        return position;
    }
}

Creating a mock HttpServletRequest out of a url string?

Here it is how to use MockHttpServletRequest:

// given
MockHttpServletRequest request = new MockHttpServletRequest();
request.setServerName("www.example.com");
request.setRequestURI("/foo");
request.setQueryString("param1=value1&param");

// when
String url = request.getRequestURL() + '?' + request.getQueryString(); // assuming there is always queryString.

// then
assertThat(url, is("http://www.example.com:80/foo?param1=value1&param"));

What is the idiomatic Go equivalent of C's ternary operator?

As others have noted, golang does not have a ternary operator or any equivalent. This is a deliberate decision thought to intend readability.

This recently lead me to a scenario constructing a bit-mask in a very efficient manner became hard to read when written idiomatically because it took up a lot of lines of screen, very inefficient when encapsulated as a function, or both, as the code produces branches:

package lib

func maskIfTrue(mask uint64, predicate bool) uint64 {
  if predicate {
    return mask
  }
  return 0
}

producing:

        text    "".maskIfTrue(SB), NOSPLIT|ABIInternal, $0-24
        funcdata        $0, gclocals·33cdeccccebe80329f1fdbee7f5874cb(SB)
        funcdata        $1, gclocals·33cdeccccebe80329f1fdbee7f5874cb(SB)
        movblzx "".predicate+16(SP), AX
        testb   AL, AL
        jeq     maskIfTrue_pc20
        movq    "".mask+8(SP), AX
        movq    AX, "".~r2+24(SP)
        ret
maskIfTrue_pc20:
        movq    $0, "".~r2+24(SP)
        ret

What I learned from this was to leverage a little more Go; using a named result in the function (result int) saves me a line declaring it in the function (and you can do the same with captures), but the compiler also recognizes this idiom (only assign a value IF) and replaces it - if possible - with a conditional instruction.

func zeroOrOne(predicate bool) (result int) {
  if predicate {
    result = 1
  }
  return
}

producing a branch-free result:

    movblzx "".predicate+8(SP), AX
    movq    AX, "".result+16(SP)
    ret

which go then freely inlines.

package lib

func zeroOrOne(predicate bool) (result int) {
  if predicate {
    result = 1
  }
  return
}

type Vendor1 struct {
    Property1 int
    Property2 float32
    Property3 bool
}

// Vendor2 bit positions.
const (
    Property1Bit = 2
    Property2Bit = 3
    Property3Bit = 5
)

func Convert1To2(v1 Vendor1) (result int) {
    result |= zeroOrOne(v1.Property1 == 1) << Property1Bit
    result |= zeroOrOne(v1.Property2 < 0.0) << Property2Bit
    result |= zeroOrOne(v1.Property3) << Property3Bit
    return
}

produces https://go.godbolt.org/z/eKbK17

    movq    "".v1+8(SP), AX
    cmpq    AX, $1
    seteq   AL
    xorps   X0, X0
    movss   "".v1+16(SP), X1
    ucomiss X1, X0
    sethi   CL
    movblzx AL, AX
    shlq    $2, AX
    movblzx CL, CX
    shlq    $3, CX
    orq     CX, AX
    movblzx "".v1+20(SP), CX
    shlq    $5, CX
    orq     AX, CX
    movq    CX, "".result+24(SP)
    ret

c# datatable insert column at position 0

You can use the following code to add column to Datatable at postion 0:

    DataColumn Col   = datatable.Columns.Add("Column Name", System.Type.GetType("System.Boolean"));
    Col.SetOrdinal(0);// to put the column in position 0;

Count rows with not empty value

It works for me:

=SUMPRODUCT(NOT(ISBLANK(F2:F)))

Count of all non-empty cells from F2 to the end of the column

Invoking JavaScript code in an iframe from the parent page

Quirksmode had a post on this.

Since the page is now broken, and only accessible via archive.org, I reproduced it here:

IFrames

On this page I give a short overview of accessing iframes from the page they’re on. Not surprisingly, there are some browser considerations.

An iframe is an inline frame, a frame that, while containing a completely separate page with its own URL, is nonetheless placed inside another HTML page. This gives very nice possibilities in web design. The problem is to access the iframe, for instance to load a new page into it. This page explains how to do it.

Frame or object?

The fundamental question is whether the iframe is seen as a frame or as an object.

As explained on the Introduction to frames pages, if you use frames the browser creates a frame hierarchy for you (top.frames[1].frames[2] and such). Does the iframe fit into this frame hierarchy?
Or does the browser see an iframe as just another object, an object that happens to have a src property? In that case we have to use a standard DOM call (like document.getElementById('theiframe')) to access it. In general browsers allow both views on 'real' (hard-coded) iframes, but generated iframes cannot be accessed as frames.

NAME attribute

The most important rule is to give any iframe you create a name attribute, even if you also use an id.

<iframe src="iframe_page1.html"
    id="testiframe"
    name="testiframe"></iframe>

Most browsers need the name attribute to make the iframe part of the frame hierarchy. Some browsers (notably Mozilla) need the id to make the iframe accessible as an object. By assigning both attributes to the iframe you keep your options open. But name is far more important than id.

Access

Either you access the iframe as an object and change its src or you access the iframe as a frame and change its location.href.

document.getElementById('iframe_id').src = 'newpage.html'; frames['iframe_name'].location.href = 'newpage.html'; The frame syntax is slightly preferable because Opera 6 supports it but not the object syntax.

Accessing the iframe

So for a complete cross–browser experience you should give the iframe a name and use the

frames['testiframe'].location.href

syntax. As far as I know this always works.

Accessing the document

Accessing the document inside the iframe is quite simple, provided you use the name attribute. To count the number of links in the document in the iframe, do frames['testiframe'].document.links.length.

Generated iframes

When you generate an iframe through the W3C DOM the iframe is not immediately entered into the frames array, though, and the frames['testiframe'].location.href syntax will not work right away. The browser needs a little time before the iframe turns up in the array, time during which no script may run.

The document.getElementById('testiframe').src syntax works fine in all circumstances.

The target attribute of a link doesn't work either with generated iframes, except in Opera, even though I gave my generated iframe both a name and an id.

The lack of target support means that you must use JavaScript to change the content of a generated iframe, but since you need JavaScript anyway to generate it in the first place, I don't see this as much of a problem.

Text size in iframes

A curious Explorer 6 only bug:

When you change the text size through the View menu, text sizes in iframes are correctly changed. However, this browser does not change the line breaks in the original text, so that part of the text may become invisible, or line breaks may occur while the line could still hold another word.

How to increase Heap size of JVM

-XmxSIZE

For example: -Xmx1024M

Textarea to resize based on content length

You can check the content's height by setting to 1px and then reading the scrollHeight property:

_x000D_

function textAreaAdjust(element) {
  element.style.height = "1px";
  element.style.height = (25+element.scrollHeight)+"px";
}

_x000D_

<textarea onkeyup="textAreaAdjust(this)" style="overflow:hidden"></textarea>

_x000D_

It works under Firefox 3, IE 7, Safari, Opera and Chrome.

What are database normal forms and can you give examples?

Here's a quick, admittedly butchered response, but in a sentence:

1NF : Your table is organized as an unordered set of data, and there are no repeating columns.

2NF: You don't repeat data in one column of your table because of another column.

3NF: Every column in your table relates only to your table's key -- you wouldn't have a column in a table that describes another column in your table which isn't the key.

For more detail, see wikipedia...

process.start() arguments

Not really a direct answer, but I'd highly recommend using LINQPad for this kind of "exploratory" C# programming.

I have the following as a saved "query" in LINQPad:

var p = new System.Diagnostics.Process();
p.StartInfo.FileName = "cmd.exe";
p.StartInfo.Arguments = "/c echo Foo && echo Bar";
p.StartInfo.RedirectStandardOutput = true;
p.StartInfo.UseShellExecute = false;
p.StartInfo.CreateNoWindow = true;
p.Start();
p.StandardOutput.ReadToEnd().Dump();

Feel free to adapt as needed.

Link and execute external JavaScript file hosted on GitHub

My use case was to load 'bookmarklets' direclty from my Bitbucket account which has same restrictions as Github. The work around I came up with was to AJAX for the script and run eval on the response string, below snippet is based on that approach.

<script>
    var sScriptURL ='<script-URL-here>'; 
    var oReq = new XMLHttpRequest(); 
    oReq.addEventListener("load", 
       function fLoad() {eval(this.responseText + '\r\n//# sourceURL=' + sScriptURL)}); 
    oReq.open("GET", sScriptURL); oReq.send(); false;
</script>

Note that appending of sourceURL comment is to allow for debuging of the script within browser's developer tools.

History or log of commands executed in Git

You can see the history with git-reflog (example here):

git reflog

How to read the RGB value of a given pixel in Python?

import matplotlib.pyplot as plt
import matplotlib.image as mpimg

img=mpimg.imread('Cricket_ACT_official_logo.png')
imgplot = plt.imshow(img)

MySQL Multiple Left Joins

To display the all details for each news post title ie. "news.id" which is the primary key, you need to use GROUP BY clause for "news.id"

SELECT news.id, users.username, news.title, news.date,
       news.body, COUNT(comments.id)
FROM news
LEFT JOIN users
ON news.user_id = users.id
LEFT JOIN comments
ON comments.news_id = news.id
GROUP BY news.id

In Java, how to append a string more efficiently?

You should use the StringBuilder class.

StringBuilder stringBuilder = new StringBuilder();

stringBuilder.append("Some text");
stringBuilder.append("Some text");
stringBuilder.append("Some text");

String finalString = stringBuilder.toString();

In addition, please visit:

Where is the default log location for SharePoint/MOSS?

For Sharepoint 2007

C:\Program Files\Common Files\Microsoft Shared\web server extensions\12\LOGS

How to specify "does not contain" in dplyr filter

Note that %in% returns a logical vector of TRUE and FALSE. To negate it, you can use ! in front of the logical statement:

SE_CSVLinelist_filtered <- filter(SE_CSVLinelist_clean, 
 !where_case_travelled_1 %in% 
   c('Outside Canada','Outside province/territory of residence but within Canada'))

Regarding your original approach with -c(...), - is a unary operator that "performs arithmetic on numeric or complex vectors (or objects which can be coerced to them)" (from help("-")). Since you are dealing with a character vector that cannot be coerced to numeric or complex, you cannot use -.

node.js - request - How to "emitter.setMaxListeners()"?

I strongly advice NOT to use the code:

process.setMaxListeners(0);

The warning is not there without reason. Most of the time, it is because there is an error hidden in your code. Removing the limit removes the warning, but not its cause, and prevents you from being warned of a source of resource leakage.

If you hit the limit for a legitimate reason, put a reasonable value in the function (the default is 10).

Also, to change the default, it is not necessary to mess with the EventEmitter prototype. you can set the value of defaultMaxListeners attribute like so:

require('events').EventEmitter.defaultMaxListeners = 15;

What does the clearfix class do in css?

How floats work

When floating elements exist on the page, non-floating elements wrap around the floating elements, similar to how text goes around a picture in a newspaper. From a document perspective (the original purpose of HTML), this is how floats work.

`float` vs `display:inline`

Before the invention of display:inline-block, websites use float to set elements beside each other. float is preferred over display:inline since with the latter, you can't set the element's dimensions (width and height) as well as vertical paddings (top and bottom) - which floated elements can do since they're treated as block elements.

Float problems

The main problem is that we're using float against its intended purpose.

Another is that while float allows side-by-side block-level elements, floats do not impart shape to its container. It's like position:absolute, where the element is "taken out of the layout". For instance, when an empty container contains a floating 100px x 100px <div>, the <div> will not impart 100px in height to the container.

Unlike position:absolute, it affects the content that surrounds it. Content after the floated element will "wrap" around the element. It starts by rendering beside it and then below it, like how newspaper text would flow around an image.

Clearfix to the rescue

What clearfix does is to force content after the floats or the container containing the floats to render below it. There are a lot of versions for clear-fix, but it got its name from the version that's commonly being used - the one that uses the CSS property clear.

Examples

Here are several ways to do clearfix , depending on the browser and use case. One only needs to know how to use the clear property in CSS and how floats render in each browser in order to achieve a perfect cross-browser clear-fix.

What you have

Your provided style is a form of clearfix with backwards compatibility. I found an article about this clearfix. It turns out, it's an OLD clearfix - still catering the old browsers. There is a newer, cleaner version of it in the article also. Here's the breakdown:

The first clearfix you have appends an invisible pseudo-element, which is styled clear:both, between the target element and the next element. This forces the pseudo-element to render below the target, and the next element below the pseudo-element.
The second one appends the style display:inline-block which is not supported by earlier browsers. inline-block is like inline but gives you some properties that block elements, like width, height as well as vertical padding. This was targeted for IE-MAC.
This was the reapplication of display:block due to IE-MAC rule above. This rule was "hidden" from IE-MAC.

All in all, these 3 rules keep the .clearfix working cross-browser, with old browsers in mind.

Slick Carousel Uncaught TypeError: $(...).slick is not a function

I'm not 100% sure, but I believe the error was caused by some client-side JavaScript that was turning exports into an object. Some code in the Slick plugin (see below) calls the require function if exports is not undefined.

Here's the portion of code I had to change in slick.js. You can see I am just commenting out the if statements, and, instead, I'm just calling factory(jQuery).

;(function(factory) {
console.log('slick in factory', define, 'exports', exports, 'factory', factory);
'use strict';
// if (typeof define === 'function' && define.amd) {
//     define(['jquery'], factory);
// } else if (typeof exports !== 'undefined') {
//     module.exports = factory(require('jquery'));
// } else {
//     factory(jQuery);
// }
factory(jQuery);
}

Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1 path $

This issue started occurring for me all of a sudden, so I was sure, there could be some other reason. On digging deep, it was a simple issue where I used http in the BaseUrl of Retrofit instead of https. So changing it to https solved the issue for me.

CryptographicException 'Keyset does not exist', but only through WCF

This is the only solution worked for me.

    // creates the CspParameters object and sets the key container name used to store the RSA key pair
    CspParameters cp = new CspParameters();
    cp.KeyContainerName = "MyKeyContainerName"; //Eg: Friendly name

    // instantiates the rsa instance accessing the key container MyKeyContainerName
    RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(cp);
    // add the below line to delete the key entry in MyKeyContainerName
    // rsa.PersistKeyInCsp = false;

    //writes out the current key pair used in the rsa instance
    Console.WriteLine("Key is : \n" + rsa.ToXmlString(true));

Reference 1

Reference 2

How to find third or n?? maximum salary from salary table?

Method 1:

SELECT TOP 1 salary FROM (
SELECT TOP 3 salary 
 FROM employees 
  ORDER BY salary DESC) AS emp 
 ORDER BY salary ASC

Method 2:

  Select EmpName,salary from
  (
    select EmpName,salary ,Row_Number() over(order by salary desc) as rowid      
     from EmpTbl)
   as a where rowid=3

Make a div fill up the remaining width

Flex-boxes are the solution - and they're fantastic. I've been wanting something like this out of css for a decade. All you need is to add display: flex to your style for "Main" and flex-grow: 100 (where 100 is arbitrary - its not important that it be exactly 100). Try adding this style (colors added to make the effect visible):

<style>
    #Main {
        background-color: lightgray;
        display: flex;
    }

    #div1 {
        border: 1px solid green;   
        height: 50px; 
        display: inline-flex; 
    }
    #div2 {
        border: 1px solid blue;    
        height: 50px;
        display: inline-flex;
        flex-grow: 100;
    }
    #div3 {
        border: 1px solid orange;        
        height: 50px;
        display: inline-flex;
    }
</style>

More info about flex boxes here: https://css-tricks.com/snippets/css/a-guide-to-flexbox/

window.onbeforeunload and window.onunload is not working in Firefox, Safari, Opera?

Firefox simply does not show custom onbeforeunload messages. Mozilla say they are protecing end users from malicious sites that might show misleading text.

Python: subplot within a loop: first panel appears in wrong position

The problem is the indexing subplot is using. Subplots are counted starting with 1! Your code thus needs to read

fig=plt.figure(figsize=(15, 6),facecolor='w', edgecolor='k')
for i in range(10):

    #this part is just arranging the data for contourf 
    ind2 = py.find(zz==i+1)
    sfr_mass_mat = np.reshape(sfr_mass[ind2],(pixmax_x,pixmax_y))
    sfr_mass_sub = sfr_mass[ind2]
    zi = griddata(massloclist, sfrloclist, sfr_mass_sub,xi,yi,interp='nn')


    temp = 251+i  # this is to index the position of the subplot
    ax=plt.subplot(temp)
    ax.contourf(xi,yi,zi,5,cmap=plt.cm.Oranges)
    plt.subplots_adjust(hspace = .5,wspace=.001)

    #just annotating where each contour plot is being placed
    ax.set_title(str(temp))

Note the change in the line where you calculate temp

What is the best way to call a script from another script?

This is an example with subprocess library:

import subprocess

python_version = '3'
path_to_run = './'
py_name = '__main__.py'

# args = [f"python{python_version}", f"{path_to_run}{py_name}"]  # Avaible in python3
args = ["python{}".format(python_version), "{}{}".format(path_to_run, py_name)]

res = subprocess.Popen(args, stdout=subprocess.PIPE)
output, error_ = res.communicate()

if not error_:
    print(output)
else:
    print(error_)

How to check the multiple permission at single request in Android M?

Based on vedval i have this solution.

public boolean checkForPermission(final String[] permissions, final int permRequestCode) {
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
        return true;
    }
    final List<String> permissionsNeeded = new ArrayList<>();
    for (int i = 0; i < permissions.length; i++) {
        final String perm = permissions[i];
        if (ContextCompat.checkSelfPermission(this, permissions[i]) != PackageManager.PERMISSION_GRANTED) {
            if (shouldShowRequestPermissionRationale(permissions[i])) {
                Snackbar.make(phrase, R.string.permission_location, Snackbar.LENGTH_INDEFINITE)
                        .setAction(android.R.string.ok, new View.OnClickListener() {
                            @Override
                            @TargetApi(Build.VERSION_CODES.M)
                            public void onClick(View v) {
                                permissionsNeeded.add(perm);
                            }
                        });
            } else {
                // add the request.
                permissionsNeeded.add(perm);
            }
        }
    }

    if (permissionsNeeded.size() > 0) {
        // go ahead and request permissions
        requestPermissions(permissionsNeeded.toArray(new String[permissionsNeeded.size()]), permRequestCode);
        return false;
    } else {
        // no permission need to be asked so all good...we have them all.
        return true;
    }
}

/**
 * Callback received when a permissions request has been completed.
 */
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
                                       @NonNull int[] grantResults) {
    if (requestCode == REQUEST_READ_LOCATION) {
        int i = 0;
        for (String permission : permissions ){
            if ( permission.equals(Manifest.permission.ACCESS_FINE_LOCATION) && grantResults.length > 0 && grantResults[i] == PackageManager.PERMISSION_GRANTED) {
                initLocationManager();
            }
            i++;
        }

    }
}

Reading a text file in MATLAB line by line

You cannot read text strings with csvread. Here is another solution:

fid1 = fopen('test.csv','r'); %# open csv file for reading
fid2 = fopen('new.csv','w'); %# open new csv file
while ~feof(fid1)
    line = fgets(fid1); %# read line by line
    A = sscanf(line,'%*[^,],%f,%f'); %# sscanf can read only numeric data :(
    if A(2)<4.185 %# test the values
        fprintf(fid2,'%s',line); %# write the line to the new file
    end
end
fclose(fid1);
fclose(fid2);

C++11 reverse range-based for-loop

Actually Boost does have such adaptor: boost::adaptors::reverse.

#include <list>
#include <iostream>
#include <boost/range/adaptor/reversed.hpp>

int main()
{
    std::list<int> x { 2, 3, 5, 7, 11, 13, 17, 19 };
    for (auto i : boost::adaptors::reverse(x))
        std::cout << i << '\n';
    for (auto i : x)
        std::cout << i << '\n';
}

C++ - unable to start correctly (0xc0150002)

It is because there is a DLL that your program is missing or can't find.

In your case I believe you are missing the openCV dlls. You can find these under the "build" directory that comes with open CV. If you are using VS2010 and building to an x86 program you can locate your dlls here under "opencv\build\x86\vc10\bin". Simply copy all these files to your Debug and Release folders and it should resolve your issues.

Generally you can resolve this issue using the following procedure:

Download Dependency Walker from here: http://www.dependencywalker.com/
Load your .exe file into Dependency Walker (under your projects Debug or Release folder), in your case this would be DisplayImage.exe
Look for any DLL's that are missing, or are corrupt, or are for the wrong architecture (i.e. x64 instead of x86) these will be highlighted in red.
For each DLL that you are missing either copy to your Debug or Release folders with your .exe, or install the required software, or add the path to the DLLs to your environment variables (Win+Pause -> Advanced System Settings -> Environment Variables)

Remember that you will need to have these DLLs in the same directory as your .exe. If you copy the .exe from the Release folder to somewhere else then you will need those DLLs copied with the .exe as well. For portability I tend to try and have a test Virtual Machine with a clean install of Windows (no updates or programs installed), and I walk through the Dependencies using the Dependency Walker one by one until the program is running happily.

This is a common problem. Also see these questions:

Can't run a vc++, error code 0xc0150002

The application was unable to start (0xc0150002) with libcurl C++ Windows 7 VS 2010

0xc0150002 Error when trying to run VC++ libcurl

The application was unable to start correctly 0xc150002

The application was unable to start correctly (0*0150002) - OpenCv

Good Luck!

Unexpected token ILLEGAL in webkit

Another possible cause for Googlers: Using additional units in a size like so:

$('#file_upload').uploadify({
    'uploader'  : '/uploadify/uploadify.swf',
    'script'    : '/uploadify/uploadify.php',
    'cancelImg' : '/uploadify/cancel.png',
    'folder'    : '/uploads',
    'queueID'        : 'custom-queue',
    'buttonImg': 'img/select-images.png',
    'width': '351px'
});

Setting '351px' there gave me the error. Removing 'px' banished the error.

Convert Mongoose docs to json

model.find({Branch:branch},function (err, docs){
  if (err) res.send(err)

  res.send(JSON.parse(JSON.stringify(docs)))
});

How to change column datatype from character to numeric in PostgreSQL 8.4

You can try using USING:

The optional USING clause specifies how to compute the new column value from the old; if omitted, the default conversion is the same as an assignment cast from old data type to new. A USING clause must be provided if there is no implicit or assignment cast from old to new type.

So this might work (depending on your data):

alter table presales alter column code type numeric(10,0) using code::numeric;
-- Or if you prefer standard casting...
alter table presales alter column code type numeric(10,0) using cast(code as numeric);

This will fail if you have anything in code that cannot be cast to numeric; if the USING fails, you'll have to clean up the non-numeric data by hand before changing the column type.

Why doesn't RecyclerView have onItemClickListener()?

Thanks to @marmor, I updated my answer.

I think it's a good solution to handle the onClick() in the ViewHolder class constructor and pass it to the parent class via OnItemClickListener interface.

MyAdapter.java

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder>{

private LayoutInflater layoutInflater;
private List<MyObject> items;
private AdapterView.OnItemClickListener onItemClickListener;

public MyAdapter(Context context, AdapterView.OnItemClickListener onItemClickListener, List<MyObject> items) {
    layoutInflater = LayoutInflater.from(context);
    this.items = items;
    this.onItemClickListener = onItemClickListener;
}

@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view = layoutInflater.inflate(R.layout.my_row_layout, parent, false);
    return new ViewHolder(view);
}

@Override
public void onBindViewHolder(ViewHolder holder, int position) {
    MyObject item = items.get(position);
}

public MyObject getItem(int position) {
    return items.get(position);
}


class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
    private TextView title;
    private ImageView avatar;

    public ViewHolder(View itemView) {
        super(itemView);
        title = itemView.findViewById(R.id.title);
        avatar = itemView.findViewById(R.id.avatar);

        title.setOnClickListener(this);
        avatar.setOnClickListener(this);
        itemView.setOnClickListener(this);
    }

    @Override
    public void onClick(View view) {
        //passing the clicked position to the parent class
        onItemClickListener.onItemClick(null, view, getAdapterPosition(), view.getId());
    }
}
}

Usage of adapter in other classes:

MyFragment.java

public class MyFragment extends Fragment implements AdapterView.OnItemClickListener {

private RecyclerView recycleview;
private MyAdapter adapter;

    .
    .
    .

private void init(Context context) {
    //passing this fragment as OnItemClickListener to the adapter
    adapter = new MyAdapter(context, this, items);
    recycleview.setAdapter(adapter);
}

@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    //you can get the clicked item from the adapter using its position
    MyObject item = adapter.getItem(position);

    //you can also find out which view was clicked
    switch (view.getId()) {
        case R.id.title:
            //title view was clicked
            break;
        case R.id.avatar:
            //avatar view was clicked
            break;
        default:
            //the whole row was clicked
    }
}

}

How to get every first element in 2 dimensional list

You could use this:

a = ((4.0, 4, 4.0), (3.0, 3, 3.6), (3.5, 6, 4.8))
a = np.array(a)
a[:,0]
returns >>> array([4. , 3. , 3.5])

How to check if a process is in hang state (Linux)

What do you mean by ‘hang state’? Typically, a process that is unresponsive and using 100% of a CPU is stuck in an endless loop. But there's no way to determine whether that has happened or whether the process might not eventually reach a loop exit state and carry on.

Desktop hang detectors just work by sending a message to the application's event loop and seeing if there's any response. If there's not for a certain amount of time they decide the app has ‘hung’... but it's entirely possible it was just doing something complicated and will come back to life in a moment once it's done. Anyhow, that's not something you can use for any arbitrary process.

Why does scanf() need "%lf" for doubles, when printf() is okay with just "%f"?

Using either a float or a double value in a C expression will result in a value that is a double anyway, so printf can't tell the difference. Whereas a pointer to a double has to be explicitly signalled to scanf as distinct from a pointer to float, because what the pointer points to is what matters.

How do I use the nohup command without getting nohup.out?

You can run the below command.

nohup <your command> & >  <outputfile> 2>&1 &

e.g. I have a nohup command inside script

./Runjob.sh > sparkConcuurent.out 2>&1

How to find elements with 'value=x'?

$('#attached_docs [value="123"]').find ... .remove();

it should do your need however, you cannot duplicate id! remember it

how to display excel sheet in html page

Office 365 and OneDrive offer an embed feature. You can then include via IFrame.

I found that setting the iframe height and width to 100% works best. That way on ipad or any device for that matter it fits the screen.

<body style="margin:0px;padding:0px;overflow:hidden">
    <iframe src="embed url" frameborder="0" style="overflow:hidden;overflow-x:hidden;overflow-y:hidden;height:100%;width:100%;position:absolute;top:0px;left:0px;right:0px;bottom:0px" height="100%" width="100%"></iframe>
</body>

How to connect android emulator to the internet

I had a similar problem on Win7 64 bit. Tried disabling my hamachi and virtualbox adapters and didn't work. Tried starting avd as admin and didn't work. In the end I disabled the teredo tunneling adapter using the info on this site and it worked: http://www.mydigitallife.info/2007/09/09/how-to-disable-tcpipv6-teredo-tunneling-in-vista/

How to convert a string variable containing time to time_t type in c++?

You can use strptime(3) to parse the time, and then mktime(3) to convert it to a time_t:

const char *time_details = "16:35:12";
struct tm tm;
strptime(time_details, "%H:%M:%S", &tm);
time_t t = mktime(&tm);  // t is now your desired time_t

Check if property has attribute

This is a pretty old question but I used

My method has this parameter but it could be built:

Expression<Func<TModel, TValue>> expression

Then in the method this:

System.Linq.Expressions.MemberExpression memberExpression 
       = expression.Body as System.Linq.Expressions.MemberExpression;
Boolean hasIdentityAttr = System.Attribute
       .IsDefined(memberExpression.Member, typeof(IsIdentity));

Dynamic LINQ OrderBy on IEnumerable<T> / IQueryable<T>

This answer is a response to the comments that need an example for the solution provided by @John Sheehan - Runscope

Please provide an example for the rest of us.

in DAL (Data Access Layer),

The IEnumerable version:

  public  IEnumerable<Order> GetOrders()
    {
      // i use Dapper to return IEnumerable<T> using Query<T>
      //.. do stuff
      return  orders  // IEnumerable<Order>
  }

The IQueryable version

  public IQueryable<Order> GetOrdersAsQuerable()
    {
        IEnumerable<Order> qry= GetOrders();
        //use the built-in extension method  AsQueryable in  System.Linq namespace
        return qry.AsQueryable();            
    }

Now you can use the IQueryable version to bind, for example GridView in Asp.net and benefit for sorting (you can't sort using IEnumerable version)

I used Dapper as ORM and build IQueryable version and utilized sorting in GridView in asp.net so easy.

Whoops, looks like something went wrong. Laravel 5.0

Check, which PHP version is running on your WAMP,XAMPP or LARAGAN server. It should be greater than 7.0.

Go to project folder like "C:\wamp\www\laravel".
Open the file name of .env.example. (By using any editor like sublime, notepad++ and so on).
Save as a .env

Then run your LARAVEL program. Hope it will work.

You can check whether how to change the PHP version in your current server. xampp, wamp

Reading/Writing a MS Word file in PHP

Reading binary Word documents would involve creating a parser according to the published file format specifications for the DOC format. I think this is no real feasible solution.

You could use the Microsoft Office XML formats for reading and writing Word files - this is compatible with the 2003 and 2007 version of Word. For reading you have to ensure that the Word documents are saved in the correct format (it's called Word 2003 XML-Document in Word 2007). For writing you just have to follow the openly available XML schema. I've never used this format for writing out Office documents from PHP, but I'm using it for reading in an Excel worksheet (naturally saved as XML-Spreadsheet 2003) and displaying its data on a web page. As the files are plainly XML data it's no problem to navigate within and figure out how to extract the data you need.

The other option - a Word 2007 only option (if the OpenXML file formats are not installed in your Word 2003) - would be to ressort to OpenXML. As databyss pointed out here the DOCX file format is just a ZIP archive with XML files included. There are a lot of resources on MSDN regarding the OpenXML file format, so you should be able to figure out how to read the data you want. Writing will be much more complicated I think - it just depends on how much time you'll invest.

Perhaps you can have a look at PHPExcel which is a library able to write to Excel 2007 files and read from Excel 2007 files using the OpenXML standard. You could get an idea of the work involved when trying to read and write OpenXML Word documents.

Find the location of a character in string

find the position of the nth occurrence of str2 in str1(same order of parameters as Oracle SQL INSTR), returns 0 if not found

instr <- function(str1,str2,startpos=1,n=1){
    aa=unlist(strsplit(substring(str1,startpos),str2))
    if(length(aa) < n+1 ) return(0);
    return(sum(nchar(aa[1:n])) + startpos+(n-1)*nchar(str2) )
}


instr('xxabcdefabdddfabx','ab')
[1] 3
instr('xxabcdefabdddfabx','ab',1,3)
[1] 15
instr('xxabcdefabdddfabx','xx',2,1)
[1] 0

How do I get the type of a variable?

You can use the typeid operator:

#include <typeinfo>
...
cout << typeid(variable).name() << endl;

What is the best way to left align and right align two div tags?

This solution has left aligned text and button on the far right.

If anyone is looking for a material design answer:

<div layout="column" layout-align="start start">
 <div layout="row" style="width:100%">
    <div flex="grow">Left Aligned text</div>
    <md-button aria-label="help" ng-click="showHelpDialog()">
      <md-icon md-svg-icon="help"></md-icon>
    </md-button>
 </div>
</div>

Differences between Oracle JDK and OpenJDK

The Oracle and OpenJDK JVMs are the same and have the same GC features (as of the latest versions 10+). Prior to Oracle managing the OpenJDK JVM there were concrete differences that made that old Openjdk JVM almost unusable in many environments. The JVMs are now the same.

The JDKs which include the JVM as part of the Kit, differ by licensing, release and maintenance schedule, and the software libraries included in the JDK. Crucial differences to me also mean things that would make code not run if not present. Not only licensing.

diff --brief -r openjdk oraclejdk

Crucially the following files are missing in addition to a bunch of others on the linux JDK (So if you 'claimed' that code didn't work on OpenJDK and did so on OracleJDK while you were using javafx then you were correct):

Only in jdk-10.0.1/bin: javapackager
Only in jdk-10.0.1/bin: javaws
Only in jdk-10.0.1/bin: jcontrol
Only in jdk-10.0.1/bin: jmc
Only in jdk-10.0.1/bin: jweblauncher
Only in jdk-10.0.1/lib: ant-javafx.jar
Only in jdk-10.0.1/lib: deploy
Only in jdk-10.0.1/lib: deploy.jar
Only in jdk-10.0.1/lib: desktop
Only in jdk-10.0.1/lib: fontconfig.bfc
Only in jdk-10.0.1/lib: fontconfig.properties.src
Only in jdk-10.0.1/lib: fontconfig.RedHat.6.bfc
Only in jdk-10.0.1/lib: fontconfig.RedHat.6.properties.src
Only in jdk-10.0.1/lib: fontconfig.SuSE.11.bfc
Only in jdk-10.0.1/lib: fontconfig.SuSE.11.properties.src
Only in jdk-10.0.1/lib: fonts
Only in jdk-10.0.1/lib: javafx.properties
Only in jdk-10.0.1/lib: javafx-swt.jar
Only in jdk-10.0.1/lib: java.jnlp.jar
Only in jdk-10.0.1/lib: javaws.jar
Only in jdk-10.0.1/lib: jdk.deploy.jar
Only in jdk-10.0.1/lib: jdk.javaws.jar
Only in jdk-10.0.1/lib: jdk.plugin.jar
Only in jdk-10.0.1/lib: jfr
Only in jdk-10.0.1/lib: libavplugin-53.so
Only in jdk-10.0.1/lib: libavplugin-54.so
Only in jdk-10.0.1/lib: libavplugin-55.so
Only in jdk-10.0.1/lib: libavplugin-56.so
Only in jdk-10.0.1/lib: libavplugin-57.so
Only in jdk-10.0.1/lib: libavplugin-ffmpeg-56.so
Only in jdk-10.0.1/lib: libavplugin-ffmpeg-57.so
Only in jdk-10.0.1/lib: libbci.so
Only in jdk-10.0.1/lib: libcmm.so
Only in jdk-10.0.1/lib: libdecora_sse.so
Only in jdk-10.0.1/lib: libdeploy.so
Only in jdk-10.0.1/lib: libfxplugins.so
Only in jdk-10.0.1/lib: libglassgtk2.so
Only in jdk-10.0.1/lib: libglassgtk3.so
Only in jdk-10.0.1/lib: libglass.so
Only in jdk-10.0.1/lib: libgstreamer-lite.so
Only in jdk-10.0.1/lib: libjavafx_font_freetype.so
Only in jdk-10.0.1/lib: libjavafx_font_pango.so
Only in jdk-10.0.1/lib: libjavafx_font.so
Only in jdk-10.0.1/lib: libjavafx_iio.so
Only in jdk-10.0.1/lib: libjfxmedia.so
Only in jdk-10.0.1/lib: libjfxwebkit.so
Only in jdk-10.0.1/lib: libnpjp2.so
Only in jdk-10.0.1/lib: libprism_common.so
Only in jdk-10.0.1/lib: libprism_es2.so
Only in jdk-10.0.1/lib: libprism_sw.so
Only in jdk-10.0.1/lib: librm.so
Only in jdk-10.0.1/lib: libt2k.so
Only in jdk-10.0.1/lib: locale
Only in jdk-10.0.1/lib: missioncontrol
Only in jdk-10.0.1/lib: oblique-fonts
Only in jdk-10.0.1/lib: plugin.jar
Only in jdk-10.0.1/lib: plugin-legacy.jar
Only in jdk-10.0.1/lib/security: blacklist
Only in jdk-10.0.1/lib/security: public_suffix_list.dat
Only in jdk-10.0.1/lib/security: trusted.libraries
Only in openjdk-10.0.1: man`

Docker-Compose persistent data MySQL

Actually this is the path and you should mention a valid path for this to work. If your data directory is in current directory then instead of my-data you should mention ./my-data, otherwise it will give you that error in mysql and mariadb also.

volumes:
 ./my-data:/var/lib/mysql

how to insert datetime into the SQL Database table?

DateTime values should be inserted as if they are strings surrounded by single quotes:

'20100301'

SQL Server allows for many accepted date formats and it should be the case that most development libraries provide a series of classes or functions to insert datetime values properly. However, if you are doing it manually, it is important to distinguish the date format using DateFormat and to use generalized format:

Set DateFormat MDY --indicates the general format is Month Day Year

Insert Table( DateTImeCol )
Values( '2011-03-12' )

By setting the dateformat, SQL Server now assumes that my format is YYYY-MM-DD instead of YYYY-DD-MM.

SET DATEFORMAT

SQL Server also recognizes a generic format that is always interpreted the same way: YYYYMMDD e.g. 20110312.

If you are asking how to insert the current date and time using T-SQL, then I would recommend using the keyword CURRENT_TIMESTAMP. For example:

Insert Table( DateTimeCol )
Values( CURRENT_TIMESTAMP )

Creating a BAT file for python script

Here's how you can put both batch code and the python one in single file:

0<0# : ^
''' 
@echo off
echo batch code
python "%~f0" %*
exit /b 0
'''

print("python code")

the ''' respectively starts and ends python multi line comments.

0<0# : ^ is more interesting - due to redirection priority in batch it will be interpreted like :0<0# ^ by the batch script which is a label which execution will be not displayed on the screen. The caret at the end will escape the new line and second line will be attached to the first line.For python it will be 0<0 statement and a start of inline comment.

The credit goes to siberia-man

A table name as a variable

Declare  @tablename varchar(50) 
set @tablename = 'Your table Name' 
EXEC('select * from ' + @tablename)

What are the lengths of Location Coordinates, latitude and longitude?

Google Maps actually uses signed values to represent the position:

Latitude : max/min 90.0000000 to -90.0000000
Longitude : max/min 180.0000000 to -180.0000000

So if you want to work with Coordinates in your projects you would need DECIMAL(10,7) ie. for SQL.

Modify request parameter with servlet filter

Try request.setAttribute("param",value);. It worked fine for me.

Please find this code sample:

private void sanitizePrice(ServletRequest request){
        if(request.getParameterValues ("price") !=  null){
            String price[] = request.getParameterValues ("price");

            for(int i=0;i<price.length;i++){
                price[i] = price[i].replaceAll("[^\\dA-Za-z0-9- ]", "").trim();
                System.out.println(price[i]);
            }
            request.setAttribute("price", price);
            //request.getParameter("numOfBooks").re
        }
    }

Sprintf equivalent in Java

Strings are immutable types. You cannot modify them, only return new string instances.

Because of that, formatting with an instance method makes little sense, as it would have to be called like:

String formatted = "%s: %s".format(key, value);

The original Java authors (and .NET authors) decided that a static method made more sense in this situation, as you are not modifying the target, but instead calling a format method and passing in an input string.

Here is an example of why format() would be dumb as an instance method. In .NET (and probably in Java), Replace() is an instance method.

You can do this:

 "I Like Wine".Replace("Wine","Beer");

However, nothing happens, because strings are immutable. Replace() tries to return a new string, but it is assigned to nothing.

This causes lots of common rookie mistakes like:

inputText.Replace(" ", "%20");

Again, nothing happens, instead you have to do:

inputText = inputText.Replace(" ","%20");

Now, if you understand that strings are immutable, that makes perfect sense. If you don't, then you are just confused. The proper place for Replace() would be where format() is, as a static method of String:

 inputText = String.Replace(inputText, " ", "%20");

Now there is no question as to what's going on.

The real question is, why did the authors of these frameworks decide that one should be an instance method, and the other static? In my opinion, both are more elegantly expressed as static methods.

Regardless of your opinion, the truth is that you are less prone to make a mistake using the static version, and the code is easier to understand (No Hidden Gotchas).

Of course there are some methods that are perfect as instance methods, take String.Length()

int length = "123".Length();

In this situation, it's obvious we are not trying to modify "123", we are just inspecting it, and returning its length. This is a perfect candidate for an instance method.

My simple rules for Instance Methods on Immutable Objects:

If you need to return a new instance of the same type, use a static method.
Otherwise, use an instance method.

Count number of rows per group and add result to original data frame

Using sqldf package:

library(sqldf)

sqldf("select a.*, b.cnt
       from df a,
           (select name, type, count(1) as cnt
            from df
            group by name, type) b
      where a.name = b.name and
            a.type = b.type")

#    name  type num cnt
# 1 black chair   4   2
# 2 black chair   5   2
# 3 black  sofa  12   1
# 4   red  sofa   4   1
# 5   red plate   3   1

What's the use of ob_start() in php?

Think of ob_start() as saying "Start remembering everything that would normally be outputted, but don't quite do anything with it yet."

For example:

ob_start();
echo("Hello there!"); //would normally get printed to the screen/output to browser
$output = ob_get_contents();
ob_end_clean();

There are two other functions you typically pair it with: ob_get_contents(), which basically gives you whatever has been "saved" to the buffer since it was turned on with ob_start(), and then ob_end_clean() or ob_flush(), which either stops saving things and discards whatever was saved, or stops saving and outputs it all at once, respectively.

Display the binary representation of a number in C?

This code should handle your needs up to 64 bits.



char* pBinFill(long int x,char *so, char fillChar); // version with fill
char* pBin(long int x, char *so);                    // version without fill
#define width 64

char* pBin(long int x,char *so)
{
 char s[width+1];
 int    i=width;
 s[i--]=0x00;   // terminate string
 do
 { // fill in array from right to left
  s[i--]=(x & 1) ? '1':'0';  // determine bit
  x>>=1;  // shift right 1 bit
 } while( x > 0);
 i++;   // point to last valid character
 sprintf(so,"%s",s+i); // stick it in the temp string string
 return so;
}


char* pBinFill(long int x,char *so, char fillChar)
{ // fill in array from right to left
 char s[width+1];
 int    i=width;
 s[i--]=0x00;   // terminate string
 do
 {
  s[i--]=(x & 1) ? '1':'0';
  x>>=1;  // shift right 1 bit
 } while( x > 0);
 while(i>=0) s[i--]=fillChar;    // fill with fillChar 
 sprintf(so,"%s",s);
 return so;
}


void test()
{
 char so[width+1]; // working buffer for pBin
 long int   val=1;
 do
 {
   printf("%ld =\t\t%#lx =\t\t0b%s\n",val,val,pBinFill(val,so,0));
   val*=11; // generate test data
 } while (val < 100000000);
}

Output:
00000001 = 0x000001 =   0b00000000000000000000000000000001
00000011 = 0x00000b =   0b00000000000000000000000000001011
00000121 = 0x000079 =   0b00000000000000000000000001111001
00001331 = 0x000533 =   0b00000000000000000000010100110011
00014641 = 0x003931 =   0b00000000000000000011100100110001
00161051 = 0x02751b =   0b00000000000000100111010100011011
01771561 = 0x1b0829 =   0b00000000000110110000100000101001
19487171 = 0x12959c3 =  0b00000001001010010101100111000011

Best way to update data with a RecyclerView adapter

Found following solution working for my similar problem:

private ExtendedHashMap mData = new ExtendedHashMap();
private  String[] mKeys;

public void setNewData(ExtendedHashMap data) {
    mData.putAll(data);
    mKeys = data.keySet().toArray(new String[data.size()]);
    notifyDataSetChanged();
}

Using the clear-command

mData.clear()

is not nessescary

How to create a file name with the current date & time in Python?

Here's some that I needed to include the date-time stamp in the folder name for dumping files from a web scraper.

# import time and OS modules to use to build file folder name
import time
import os 

# Build string for directory to hold files
# Output Configuration
#   drive_letter = Output device location (hard drive) 
#   folder_name = directory (folder) to receive and store PDF files

drive_letter = r'D:\\' 
folder_name = r'downloaded-files'
folder_time = datetime.now().strftime("%Y-%m-%d_%I-%M-%S_%p")
folder_to_save_files = drive_letter + folder_name + folder_time 

# IF no such folder exists, create one automatically
if not os.path.exists(folder_to_save_files):
    os.mkdir(folder_to_save_files)

Print an ArrayList with a for-each loop

import java.util.ArrayList;
import java.util.List;

class ArrLst{

    public static void main(String args[]){

        List l=new ArrayList();
        l.add(10);
        l.add(11);
        l.add(12);
        l.add(13);
        l.add(14);
        l.forEach((a)->System.out.println(a));
    }
}

Access denied for user 'root'@'localhost' (using password: Yes) after password reset LINUX

In my case:

/etc/init.d/mysql stop
mysqld_safe --skip-grant-tables &

(in new window)

mysql -u root
mysql> use mysql;
mysql> update user set authentication_string=password('password') where user='root';
mysql>flush privileges;
mysql> quit
/etc/init.d/mysql restart

Does Python have an ordered set?

A little late to the game, but I've written a class setlist as part of collections-extended that fully implements both Sequence and Set

>>> from collections_extended import setlist
>>> sl = setlist('abracadabra')
>>> sl
setlist(('a', 'b', 'r', 'c', 'd'))
>>> sl[3]
'c'
>>> sl[-1]
'd'
>>> 'r' in sl  # testing for inclusion is fast
True
>>> sl.index('d')  # so is finding the index of an element
4
>>> sl.insert(1, 'd')  # inserting an element already in raises a ValueError
ValueError
>>> sl.index('d')
4

GitHub: https://github.com/mlenzen/collections-extended

Documentation: http://collections-extended.lenzm.net/en/latest/

PyPI: https://pypi.python.org/pypi/collections-extended

window.location.reload with clear cache

i had this problem and i solved it using javascript

 location.reload(true);

you may also use

window.history.forward(1);

to stop the browser back button after user logs out of the application.

jQuery.parseJSON throws “Invalid JSON” error due to escaped single quote in JSON

I was trying to save a JSON object from a XHR request into a HTML5 data-* attribute. I tried many of above solutions with no success.

What I finally end up doing was replacing the single quote ' with it code ' using a regex after the stringify() method call the following way:

var productToString = JSON.stringify(productObject);
var quoteReplaced = productToString.replace(/'/g, "&#39;");
var anchor = '<a data-product=\'' + quoteReplaced + '\' href=\'#\'>' + productObject.name + '</a>';
// Here you can use the "anchor" variable to update your DOM element.

How do I get indices of N maximum values in a NumPy array?

I found it most intuitive to use np.unique.

The idea is, that the unique method returns the indices of the input values. Then from the max unique value and the indicies, the position of the original values can be recreated.

multi_max = [1,1,2,2,4,0,0,4]
uniques, idx = np.unique(multi_max, return_inverse=True)
print np.squeeze(np.argwhere(idx == np.argmax(uniques)))
>> [4 7]

How to rsync only a specific list of files?

For the record, none of the answers above helped except for one. To summarize, you can do the backup operation using --files-from= by using either:

 rsync -aSvuc `cat rsync-src-files` /mnt/d/rsync_test/

 rsync -aSvuc --recursive --files-from=rsync-src-files . /mnt/d/rsync_test/

The former command is self explanatory, beside the content of the file rsync-src-files which I will elaborate down below. Now, if you want to use the latter version, you need to keep in mind the following four remarks:

Notice one needs to specify both --files-from and the source directory
One needs to explicitely specify --recursive.
The file rsync-src-files is a user created file and it was placed within the src directory for this test
The rsyn-src-files contain the files and folders to copy and they are taken relative to the source directory. IMPORTANT: Make sure there is not trailing spaces or blank lines in the file. In the example below, there are only two lines, not three (Figure it out by chance). Content of rsynch-src-files is:

folderName1
folderName2

Installing R with Homebrew

You can also install R from this page:

https://cran.r-project.org/bin/macosx/

It works out of the box

YAML Multi-Line Arrays

The following would work:

myarray: [
  String1, String2, String3,
  String4, String5, String5, String7
]

I tested it using the snakeyaml implementation, I am not sure about other implementations though.

Dynamically add properties to a existing object

It's not possible with a "normal" object, but you can do it with an ExpandoObject and the dynamic keyword:

dynamic person = new ExpandoObject();
person.FirstName = "Sam";
person.LastName = "Lewis";
person.Age = 42;
person.Foo = "Bar";
...

If you try to assign a property that doesn't exist, it is added to the object. If you try to read a property that doesn't exist, it will raise an exception. So it's roughly the same behavior as a dictionary (and ExpandoObject actually implements IDictionary<string, object>)

Where to put default parameter value in C++?

If the functions are exposed - non-member, public or protected - then the caller should know about them, and the default values must be in the header.

If the functions are private and out-of-line, then it does make sense to put the defaults in the implementation file because that allows changes that don't trigger client recompilation (a sometimes serious issue for low-level libraries shared in enterprise scale development). That said, it is definitely potentially confusing, and there is documentation value in presenting the API in a more intuitive way in the header, so pick your compromise - though consistency's the main thing when there's no compelling reason either way.

How to detect duplicate values in PHP array?

A simple method:

$array = array_values(array_unique($array, SORT_REGULAR));

Multi-dimensional arraylist or list in C#?

If you want to modify this I'd go with either of the following:

List<string[]> results;

-- or --

List<List<string>> results;

depending on your needs...

Loop through list with both content and index

enumerate() makes this prettier:

for index, value in enumerate(S):
    print index, value

See here for more.

How do I update a model value in JavaScript in a Razor view?

The model (@Model) only exists while the page is being constructed. Once the page is rendered in the browser, all that exists is HTML, JavaScript and CSS.

What you will want to do is put the PostID in a hidden field. As the PostID value is fixed, there actually is no need for JavaScript. A simple @HtmlHiddenFor will suffice.

However, you will want to change your foreach loop to a for loop. The final solution will look something like this:

for (int i = 0 ; i < Model.Post; i++)
{
    <br/>
    <b>Posted by :</b> @Model.Post[i].Username <br/>
    <span>@Model.Post[i].Content</span> <br/>
    if(Model.loginuser == Model.username)
    {
        @Html.HiddenFor(model => model.Post[i].PostID)
        @Html.TextAreaFor(model => model.addcomment.Content)
        <button type="submit">Add Comment</button>
    }
}

Critical t values in R

Extending @Ryogi answer above, you can take advantage of the lower.tail parameter like so:

qt(0.25/2, 40, lower.tail = FALSE) # 75% confidence

qt(0.01/2, 40, lower.tail = FALSE) # 99% confidence

Why are iframes considered dangerous and a security risk?

As soon as you're displaying content from another domain, you're basically trusting that domain not to serve-up malware.

There's nothing wrong with iframes per se. If you control the content of the iframe, they're perfectly safe.

How do you do block comments in YAML?

Not trying to be smart about it, but if you use Sublime Text for your editor, the steps are:

Select the block
cmd+/ on Mac or ctrl+/ on Linux & Windows
Profit

I'd imagine that other editors have similar functionality too. Which one are you using? I'd be happy to do some digging.

Best way to list files in Java, sorted by Date Modified?

I think your solution is the only sensible way. The only way to get the list of files is to use File.listFiles() and the documentation states that this makes no guarantees about the order of the files returned. Therefore you need to write a Comparator that uses File.lastModified() and pass this, along with the array of files, to Arrays.sort().

how to install tensorflow on anaconda python 3.6

Simple Way from Scratch.

Download Anaconda from https://repo.anaconda.com/archive/Anaconda3-5.2.0-Windows-x86_64.exe
Install Anaconda by double clicking it.
Open anaconda prompt by searching anaconda in windows search and type the following command while being connected to internet.

A. conda create -n tensorflow_env python=3.6

B. conda activate tensorflow_env

C. conda install -c conda-forge tensorflow

Step C will take time. After install type python in conda prompt and type

import tensorflow as tf

If no error is found your installation is successful.

Using comma as list separator with AngularJS

_x000D_

.list-comma::before {_x000D_
  content: ',';_x000D_
}_x000D_
.list-comma:first-child::before {_x000D_
  content: '';_x000D_
}

_x000D_

<span class="list-comma" ng-repeat="destination in destinations">_x000D_
                            {{destination.name}}_x000D_
                        </span>

_x000D_

PHP, MySQL error: Column count doesn't match value count at row 1

The number of column parameters in your insert query is 9, but you've only provided 8 values.

INSERT INTO dbname (id, Name, Description, shortDescription, Ingredients, Method, Length, dateAdded, Username) VALUES ('', '%s', '%s', '%s', '%s', '%s', '%s', '%s')

The query should omit the "id" parameter, because it is auto-generated (or should be anyway):

INSERT INTO dbname (Name, Description, shortDescription, Ingredients, Method, Length, dateAdded, Username) VALUES ('', '%s', '%s', '%s', '%s', '%s', '%s', '%s')

ApplicationContextException: Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean

Case 1:

@SpringBootApplication annotation missing in your spring boot starter class.

Case 2:

For non web application, disable `web application type` in properties file:

In application.properties:

spring.main.web-application-type=none

If you use application.yml then add:

  spring:
    main:
      web-application-type: none

For web applications, extends `SpringBootServletInitializer` in main class.

@SpringBootApplication
public class YourAppliationName extends SpringBootServletInitializer{
    public static void main(String[] args) {
        SpringApplication.run(YourAppliationName.class, args);
    }
}

Case 3:

If you use spring-boot-starter-webflux then also add spring-boot-starter-web as dependency.

Set maxlength in Html Textarea

try this

$(function(){
  $("textarea[maxlength]")
    .keydown(function(event){
       return !$(this).attr("maxlength") || this.value.length < $(this).attr("maxlength") || event.keyCode == 8 || event.keyCode == 46;
    })
    .keyup(function(event){
      var limit = $(this).attr("maxlength");

      if (!limit) return;

      if (this.value.length <= limit) return true;
      else {
        this.value = this.value.substr(0,limit);
        return false;
      }    
    });
});

For me works really perfect without jumping/showing additional characters; works exactly like maxlength on input

How do I escape spaces in path for scp copy in Linux?

I had huge difficulty getting this to work for a shell variable containing a filename with whitespace. For some reason using:

file="foo bar/baz"
scp [email protected]:"'$file'"

as in @Adrian's answer seems to fail.

Turns out that what works best is using a parameter expansion to prepend backslashes to the whitespace as follows:

file="foo bar/baz"
file=${file// /\\ }
scp [email protected]:"$file"

Get original URL referer with PHP?

As Johnathan Suggested, you would either want to save it in a cookie or a session.

The easier way would be to use a Session variable.

session_start();
if(!isset($_SESSION['org_referer']))
{
    $_SESSION['org_referer'] = $_SERVER['HTTP_REFERER'];
}

Put that at the top of the page, and you will always be able to access the first referer that the site visitor was directed by.

JavaFX: How to get stage from controller during initialization?

The simplest way to get stage object in controller is:

Add an extra method in own created controller class like (it will be a setter method to set the stage in controller class),
```
private Stage myStage;
public void setStage(Stage stage) {
     myStage = stage;
}
```

Get controller in start method and set stage

FXMLLoader loader = new FXMLLoader(getClass().getResource("MyFXML.fxml"));
OwnController controller = loader.getController();
controller.setStage(this.stage);

Now you can access the stage in controller

Angular CLI Error: The serve command requires to be run in an Angular project, but a project definition could not be found

In my case, I forgot to change my directory, so just after running the command :

ng new AngularProject

execute another command :

cd AngularProject

and ng serve worked for me.

sqlite3.ProgrammingError: Incorrect number of bindings supplied. The current statement uses 1, and there are 74 supplied

cursor.execute(sql,array)

Only takes two arguments.
It will iterate the "array"-object and match ? in the sql-string.
(with sanity checks to avoid sql-injection)

Warning: mysqli_connect(): (HY000/1045): Access denied for user 'username'@'localhost' (using password: YES)

Make sure that your password doesn't have special characters and just keep a plain password (for ex: 12345), it will work. This is the strangest thing that I have ever seen. I spent about 2 hours to figure this out.

Note: 12345 mentioned below is your plain password

GRANT ALL PRIVILEGES ON dbname.* TO 'yourusername'@'%' IDENTIFIED BY '12345';

Add vertical scroll bar to panel

Try this instead for 'only' scrolling vertical.
(auto scroll needs to be false before it will accept changes)

mypanel.AutoScroll = false;
mypanel.HorizontalScroll.Enabled = false;
mypanel.HorizontalScroll.Visible = false;
mypanel.HorizontalScroll.Maximum = 0;
mypanel.AutoScroll = true;

Authentication plugin 'caching_sha2_password' cannot be loaded

I was installing MySQL on my Windows 10 PC using "MySQL Web Installer" and was facing the same issue while trying to connect using MySQL workbench. I fixed the issue by reconfiguring the server form the Installer window.

Clicking on the "Reconfigure" option it will allow to reconfigure the server. Click on "Next" until you reach "Authentication Method".

Once on this tab, use the second option "Use Legacy Authentication Method (Retain MySQL 5.x Compatibility)".

Keep everything else as is and that is how I solved my issue.

Finish all activities at a time

None of the other answers worked for me. But I researched some more and finally got the answer.

You actually asked to close the app as I needed. So, add following code:

_x000D_

finishAffinity();

_x000D_

WebForms UnobtrusiveValidationMode requires a ScriptResourceMapping for 'jquery'. Please add a ScriptResourceMapping named jquery(case-sensitive)

to add a little more to the answer from b_levitt... on global.asax:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.SessionState;
using System.Web.UI;

namespace LoginPage
{
    public class Global : System.Web.HttpApplication
    {
        protected void Application_Start(object sender, EventArgs e)
        {
            string JQueryVer = "1.11.3";
            ScriptManager.ScriptResourceMapping.AddDefinition("jquery", new ScriptResourceDefinition
            {
                Path = "~/js/jquery-" + JQueryVer + ".min.js",
                DebugPath = "~/js/jquery-" + JQueryVer + ".js",
                CdnPath = "http://ajax.aspnetcdn.com/ajax/jQuery/jquery-" + JQueryVer + ".min.js",
                CdnDebugPath = "http://ajax.aspnetcdn.com/ajax/jQuery/jquery-" + JQueryVer + ".js",
                CdnSupportsSecureConnection = true,
                LoadSuccessExpression = "window.jQuery"
            });
        }
    }
}

on your default.aspx

<body>
   <form id="UserSectionForm" runat="server">
     <asp:ScriptManager ID="ScriptManager" runat="server">
          <Scripts>
               <asp:ScriptReference Name="jquery" />
          </Scripts>
     </asp:ScriptManager>
     <%--rest of your markup goes here--%>         
   </form>
</body>

Redirect stdout to a file in Python?

Here is a variation of Yuda Prawira answer:

implement flush() and all the file attributes
write it as a contextmanager
capture stderr also

import contextlib, sys

@contextlib.contextmanager
def log_print(file):
    # capture all outputs to a log file while still printing it
    class Logger:
        def __init__(self, file):
            self.terminal = sys.stdout
            self.log = file

        def write(self, message):
            self.terminal.write(message)
            self.log.write(message)

        def __getattr__(self, attr):
            return getattr(self.terminal, attr)

    logger = Logger(file)

    _stdout = sys.stdout
    _stderr = sys.stderr
    sys.stdout = logger
    sys.stderr = logger
    try:
        yield logger.log
    finally:
        sys.stdout = _stdout
        sys.stderr = _stderr


with log_print(open('mylogfile.log', 'w')):
    print('hello world')
    print('hello world on stderr', file=sys.stderr)

# you can capture the output to a string with:
# with log_print(io.StringIO()) as log:
#   ....
#   print('[captured output]', log.getvalue())

docker mounting volumes on host

The VOLUME command will mount a directory inside your container and store any files created or edited inside that directory on your hosts disk outside the container file structure, bypassing the union file system.

The idea is that your volumes can be shared between your docker containers and they will stay around as long as there's a container (running or stopped) that references them.

You can have other containers mount existing volumes (effectively sharing them between containers) by using the --volumes-from command when you run a container.

The fundamental difference between VOLUME and -v is this: -v will mount existing files from your operating system inside your docker container and VOLUME will create a new, empty volume on your host and mount it inside your container.

Example:

You have a Dockerfile that defines a VOLUME /var/lib/mysql.
You build the docker image and tag it some-volume
You run the container

And then,

You have another docker image that you want to use this volume
You run the docker container with the following: docker run --volumes-from some-volume docker-image-name:tag
Now you have a docker container running that will have the volume from some-volume mounted in /var/lib/mysql

Note: Using --volumes-from will mount the volume over whatever exists in the location of the volume. I.e., if you had stuff in /var/lib/mysql, it will be replaced with the contents of the volume.

hide div tag on mobile view only?

The solution given didn't work for me on the desktop, it just showed both divs, although the mobile only showed the mobile div. So I did a little search and found the min-width option. I updated my code to the following and it works fine now :)

CSS:

    @media all and (min-width: 480px) {
    .deskContent {display:block;}
    .phoneContent {display:none;}
}

@media all and (max-width: 479px) {
    .deskContent {display:none;}
    .phoneContent {display:block;}
}

HTML:

<div class="deskContent">Content for desktop</div>
<div class="phoneContent">Content for mobile</div>

Equal height rows in CSS Grid Layout

Short Answer

If the goal is to create a grid with equal height rows, where the tallest cell in the grid sets the height for all rows, here's a quick and simple solution:

Set the container to grid-auto-rows: 1fr

How it works

Grid Layout provides a unit for establishing flexible lengths in a grid container. This is the fr unit. It is designed to distribute free space in the container and is somewhat analogous to the flex-grow property in flexbox.

If you set all rows in a grid container to 1fr, let's say like this:

grid-auto-rows: 1fr;

... then all rows will be equal height.

It doesn't really make sense off-the-bat because fr is supposed to distribute free space. And if several rows have content with different heights, then when the space is distributed, some rows would be proportionally smaller and taller.

Except, buried deep in the grid spec is this little nugget:

7.2.3. Flexible Lengths: the fr unit

...

When the available space is infinite (which happens when the grid container’s width or height is indefinite), flex-sized (fr) grid tracks are sized to their contents while retaining their respective proportions.

The used size of each flex-sized grid track is computed by determining the max-content size of each flex-sized grid track and dividing that size by the respective flex factor to determine a “hypothetical 1fr size”.

The maximum of those is used as the resolved 1fr length (the flex fraction), which is then multiplied by each grid track’s flex factor to determine its final size.

So, if I'm reading this correctly, when dealing with a dynamically-sized grid (e.g., the height is indefinite), grid tracks (rows, in this case) are sized to their contents.

The height of each row is determined by the tallest (max-content) grid item.

The maximum height of those rows becomes the length of 1fr.

That's how 1fr creates equal height rows in a grid container.

Why flexbox isn't an option

As noted in the question, equal height rows are not possible with flexbox.

Flex items can be equal height on the same row, but not across multiple rows.

This behavior is defined in the flexbox spec:

6. Flex Lines

In a multi-line flex container, the cross size of each line is the minimum size necessary to contain the flex items on the line.

In other words, when there are multiple lines in a row-based flex container, the height of each line (the "cross size") is the minimum height necessary to contain the flex items on the line.

Is it possible to find out the users who have checked out my project on GitHub?

Go to the traffic section inside graphs. Here you can find how many unique visitors you have. Other than this there is no other way to know who exactly viewed your account.

Singletons vs. Application Context in Android?

From: Developer > reference - Application

There is normally no need to subclass Application. In most situation, static singletons can provide the same functionality in a more modular way. If your singleton needs a global context (for example to register broadcast receivers), the function to retrieve it can be given a Context which internally uses Context.getApplicationContext() when first constructing the singleton.

Spring MVC UTF-8 Encoding

Ok guys I found the reason for my encoding issue.

The fault was in my build process. I didn't tell Maven in my pom.xml file to build the project with the UTF-8 encoding. Therefor Maven just took the default encoding from my system which is MacRoman and build it with the MacRoman encoding.

Luckily Maven is warning you about this when building your project (BUT there is a good chance that the warning disappears to fast from your screen because of all the other messages).

Here is the property you need to set in the pom.xml file:

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    ...
</properties>

Thank you guys for all your help. Without you guys I wouldn't be able to figure this out!

How to get the <html> tag HTML with JavaScript / jQuery?

if you want to get an attribute of an HTML element with jQuery you can use .attr();

so $('html').attr('someAttribute'); will give you the value of someAttribute of the element html

http://api.jquery.com/attr/

Additionally:

there is a jQuery plugin here: http://plugins.jquery.com/project/getAttributes

that allows you to get all attributes from an HTML element

Proper use of the IDisposable interface

If MyCollection is going to be garbage collected anyway, then you shouldn't need to dispose it. Doing so will just churn the CPU more than necessary, and may even invalidate some pre-calculated analysis that the garbage collector has already performed.

I use IDisposable to do things like ensure threads are disposed correctly, along with unmanaged resources.

EDIT In response to Scott's comment:

The only time the GC performance metrics are affected is when a call the [sic] GC.Collect() is made"

Conceptually, the GC maintains a view of the object reference graph, and all references to it from the stack frames of threads. This heap can be quite large and span many pages of memory. As an optimisation, the GC caches its analysis of pages that are unlikely to change very often to avoid rescanning the page unnecessarily. The GC receives notification from the kernel when data in a page changes, so it knows that the page is dirty and requires a rescan. If the collection is in Gen0 then it's likely that other things in the page are changing too, but this is less likely in Gen1 and Gen2. Anecdotally, these hooks were not available in Mac OS X for the team who ported the GC to Mac in order to get the Silverlight plug-in working on that platform.

Another point against unnecessary disposal of resources: imagine a situation where a process is unloading. Imagine also that the process has been running for some time. Chances are that many of that process's memory pages have been swapped to disk. At the very least they're no longer in L1 or L2 cache. In such a situation there is no point for an application that's unloading to swap all those data and code pages back into memory to 'release' resources that are going to be released by the operating system anyway when the process terminates. This applies to managed and even certain unmanaged resources. Only resources that keep non-background threads alive must be disposed, otherwise the process will remain alive.

Now, during normal execution there are ephemeral resources that must be cleaned up correctly (as @fezmonkey points out database connections, sockets, window handles) to avoid unmanaged memory leaks. These are the kinds of things that have to be disposed. If you create some class that owns a thread (and by owns I mean that it created it and therefore is responsible for ensuring it stops, at least by my coding style), then that class most likely must implement IDisposable and tear down the thread during Dispose.

The .NET framework uses the IDisposable interface as a signal, even warning, to developers that the this class must be disposed. I can't think of any types in the framework that implement IDisposable (excluding explicit interface implementations) where disposal is optional.

jQuery form validation on button click

$(document).ready(function() {
    $("#form1").validate({
        rules: {
            field1: "required"
        },
        messages: {
            field1: "Please specify your name"
        }
    })
});

<form id="form1" name="form1">
     Field 1: <input id="field1" type="text" class="required">
    <input id="btn" type="submit" value="Validate">
</form>

You are also you using type="button". And I'm not sure why you ought to separate the submit button, place it within the form. It's more proper to do it that way. This should work.

Adding custom radio buttons in android

Below code is example of custom radio button. follow below steps..

Xml file.

 <FrameLayout
     android:layout_width="0dp"
     android:layout_height="match_parent"
     android:layout_weight="0.5">

     <TextView
         android:id="@+id/text_gender"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="left|center_vertical"
         android:gravity="center"
         android:text="@string/gender"
         android:textColor="#263238"
         android:textSize="15sp"
         android:textStyle="normal"

         />

     <TextView
         android:id="@+id/text_male"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
         android:layout_marginLeft="10dp"
         android:gravity="center"
         android:text="@string/male"
         android:textColor="#263238"
         android:textSize="15sp"
         android:textStyle="normal"/>

     <RadioButton
         android:id="@+id/radio_Male"
         android:layout_width="28dp"
         android:layout_height="28dp"
         android:layout_gravity="right|center_vertical"
         android:layout_marginRight="4dp"
         android:button="@drawable/custom_radio_button"
         android:checked="true"
         android:text=""
         android:onClick="onButtonClicked"
         android:textSize="15sp"
         android:textStyle="normal"

         />
 </FrameLayout>

 <FrameLayout
     android:layout_width="0dp"
     android:layout_height="match_parent"
     android:layout_weight="0.6">

     <RadioButton
         android:id="@+id/radio_Female"
         android:layout_width="28dp"
         android:layout_height="28dp"
         android:layout_gravity="right|center_vertical"
         android:layout_marginLeft="10dp"
         android:layout_marginRight="0dp"
         android:button="@drawable/custom_female_button"
         android:text=""
         android:onClick="onButtonClicked"
         android:textSize="15sp"
         android:textStyle="normal"/>

     <TextView
         android:id="@+id/text_female"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="left|center_vertical"
         android:gravity="center"
         android:text="@string/female"
         android:textColor="#263238"
         android:textSize="15sp"
         android:textStyle="normal"/>

     <RadioButton
         android:id="@+id/radio_Other"
         android:layout_width="28dp"
         android:layout_height="28dp"
         android:layout_gravity="center_horizontal|bottom"
         android:layout_marginRight="10dp"
         android:button="@drawable/custom_other_button"
         android:text=""
         android:onClick="onButtonClicked"
         android:textSize="15sp"
         android:textStyle="normal"/>

     <TextView
         android:id="@+id/text_other"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="right|center_vertical"
         android:layout_marginRight="34dp"
         android:gravity="center"
         android:text="@string/other"
         android:textColor="#263238"
         android:textSize="15sp"
         android:textStyle="normal"/>
 </FrameLayout>

2.add the custom xml for the radio buttons

2.1.other drawable

custom_other_button.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:state_checked="true" android:drawable="@drawable/select_radio_other" />
    <item android:state_checked="false" android:drawable="@drawable/default_radio" />

</selector>

2.2.female drawable

custom_female_button.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:state_checked="true" android:drawable="@drawable/select_radio_female" />
    <item android:state_checked="false" android:drawable="@drawable/default_radio" />

</selector>

2.3. male drawable

custom_radio_button.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:state_checked="true" android:drawable="@drawable/select_radio_male" />
    <item android:state_checked="false" android:drawable="@drawable/default_radio" />
</selector>

Output: this is the output screen

Create MSI or setup project with Visual Studio 2012

I think that Deploying an Office Solution by Using ClickOnce (MSDN) can be useful.

After creating an Outlook plugin for Office 2010 the problem was to install it on the customer's computer, without using ISLE or other complex tools (or expensive).

The solution was to use the publish instrument of the Visual Studio project, as described in the link. Just two things to be done before the setup will work:

Is it possible to use an input value attribute as a CSS selector?

As mentioned before, you need more than a css selector because it doesn't access the stored value of the node, so javascript is definitely needed. Heres another possible solution:

<style>
input:not([value=""]){
border:2px solid red;
}
</style>

<input type="text" onkeyup="this.setAttribute('value', this.value);"/>

C++ [Error] no matching function for call to

You are trying to call DeckOfCards::shuffle with a deckOfCards parameter:

deckOfCards cardDeck; // create DeckOfCards object
cardDeck.shuffle(cardDeck); // shuffle the cards in the deck

But the method takes a vector<Card>&:

void deckOfCards::shuffle(vector<Card>& deck)

The compiler error messages are quite clear on this. I'll paraphrase the compiler as it talks to you.

Error:

[Error] no matching function for call to 'deckOfCards::shuffle(deckOfCards&)'

Paraphrased:

Hey, pal. You're trying to call a function called shuffle which apparently takes a single parameter of type reference-to-deckOfCards, but there is no such function.

Error:

[Note] candidate is:

In file included from main.cpp

[Note] void deckOfCards::shuffle(std::vector&)

Paraphrased:

I mean, maybe you meant this other function called shuffle, but that one takes a reference-tovector<something>.

Error:

[Note] no known conversion for argument 1 from 'deckOfCards' to 'std::vector&'

Which I'd be happy to call if I knew how to convert from a deckOfCards to a vector; but I don't. So I won't.

What does "wrong number of arguments (1 for 0)" mean in Ruby?

You passed an argument to a function which didn't take any. For example:

def takes_no_arguments
end

takes_no_arguments 1
# ArgumentError: wrong number of arguments (1 for 0)

How to set background image in Java?

Or try this ;)

try {
  this.setContentPane(
    new JLabel(new ImageIcon(ImageIO.read(new File("your_file.jpeg")))));
} catch (IOException e) {};

jQuery 'input' event

jQuery has the following signature for the .on() method: .on( events [, selector ] [, data ], handler )

Events could be anyone of the ones listed on this reference:

https://developer.mozilla.org/en-US/docs/Web/Events

Though, they are not all supported by every browser.

Mozilla states the following about the input event:

The DOM input event is fired synchronously when the value of an or element is changed. Additionally, it fires on contenteditable editors when its contents are changed.

Can I use VARCHAR as the PRIMARY KEY?

It depends on the specific use case.

If your table is static and only has a short list of values (and there is just a small chance that this would change during a lifetime of DB), I would recommend this construction:

CREATE TABLE Foo 
(
    FooCode VARCHAR(16), -- short code or shortcut, but with some meaning.
    Name NVARCHAR(128), -- full name of entity, can be used as fallback in case when your localization for some language doesn't exist
    LocalizationCode AS ('Foo.' + FooCode) -- This could be a code for your localization table...&nbsp;
)

Of course, when your table is not static at all, using INT as primary key is the best solution.

append to url and refresh page

Also:

window.location.href += (window.location.href.indexOf('?') > -1 ? '&' : '?') + 'param=1'

Just one liner of Shlomi answer usable in bookmarklets

Angular: Cannot Get /

You can see the errors after stopping debbuging by choosing the option to display ASP.NET Core Web Server output in the output window. In my case I was pointing to a different templateUrl.

C# An established connection was aborted by the software in your host machine

This problem appear if two software use same port for connecting to the server
try to close the port by cmd according to your operating system
then reboot your Android studio or your Eclipse or your Software.

How to create multidimensional array

I've created an npm module to do this with some added flexibility:

// create a 3x3 array
var twodimensional = new MultiDimensional([3, 3])

// create a 3x3x4 array
var threedimensional = new MultiDimensional([3, 3, 4])

// create a 4x3x4x2 array
var fourdimensional = new MultiDimensional([4, 3, 4, 2])

// etc...

You can also initialize the positions with any value:

// create a 3x4 array with all positions set to 0
var twodimensional = new MultiDimensional([3, 4], 0)

// create a 3x3x4 array with all positions set to 'Default String'
var threedimensionalAsStrings = new MultiDimensional([3, 3, 4], 'Default String')

Or more advanced:

// create a 3x3x4 array with all positions set to a unique self-aware objects.
var threedimensional = new MultiDimensional([3, 3, 4], function(position, multidimensional) {
    return {
        mydescription: 'I am a cell at position ' + position.join(),
        myposition: position,
        myparent: multidimensional
    }
})

Get and set values at positions:

// get value
threedimensional.position([2, 2, 2])

// set value
threedimensional.position([2, 2, 2], 'New Value')

Creating and throwing new exception

You can throw your own custom errors by extending the Exception class.

class CustomException : Exception {
    [string] $additionalData

    CustomException($Message, $additionalData) : base($Message) {
        $this.additionalData = $additionalData
    }
}

try {
    throw [CustomException]::new('Error message', 'Extra data')
} catch [CustomException] {
    # NOTE: To access your custom exception you must use $_.Exception
    Write-Output $_.Exception.additionalData

    # This will produce the error message: Didn't catch it the second time
    throw [CustomException]::new("Didn't catch it the second time", 'Extra data')
}

How to pass multiple parameter to @Directives (@Components) in Angular with TypeScript?

Another neat option is to use the Directive as an element and not as an attribute.

@Directive({
   selector: 'app-directive'
})
export class InformativeDirective implements AfterViewInit {

    @Input()
    public first: string;

    @Input()
    public second: string;

    ngAfterViewInit(): void {
       console.log(`Values: ${this.first}, ${this.second}`);
    }
}

And this directive can be used like that:

<app-someKindOfComponent>
    <app-directive [first]="'first 1'" [second]="'second 1'">A</app-directive>
    <app-directive [first]="'First 2'" [second]="'second 2'">B</app-directive>
    <app-directive [first]="'First 3'" [second]="'second 3'">C</app-directive>
</app-someKindOfComponent>`

Simple, neat and powerful.

Set Focus After Last Character in Text Box

Chris Coyier has a mini jQuery plugin for this which works perfectly well: http://css-tricks.com/snippets/jquery/move-cursor-to-end-of-textarea-or-input/

It uses setSelectionRange if supported, else has a solid fallback.

jQuery.fn.putCursorAtEnd = function() {
  return this.each(function() {
    $(this).focus()
    // If this function exists...
    if (this.setSelectionRange) {
      // ... then use it (Doesn't work in IE)
      // Double the length because Opera is inconsistent about whether a carriage return is one character or two. Sigh.
      var len = $(this).val().length * 2;
      this.setSelectionRange(len, len);
    } else {
      // ... otherwise replace the contents with itself
      // (Doesn't work in Google Chrome)
      $(this).val($(this).val());
    }
    // Scroll to the bottom, in case we're in a tall textarea
    // (Necessary for Firefox and Google Chrome)
    this.scrollTop = 999999;
  });
};

Then you can just do:

input.putCursorAtEnd();

Using client certificate in Curl command

TLS client certificates are not sent in HTTP headers. They are transmitted by the client as part of the TLS handshake, and the server will typically check the validity of the certificate during the handshake as well.

If the certificate is accepted, most web servers can be configured to add headers for transmitting the certificate or information contained on the certificate to the application. Environment variables are populated with certificate information in Apache and Nginx which can be used in other directives for setting headers.

As an example of this approach, the following Nginx config snippet will validate a client certificate, and then set the SSL_CLIENT_CERT header to pass the entire certificate to the application. This will only be set when then certificate was successfully validated, so the application can then parse the certificate and rely on the information it bears.

server {
    listen 443 ssl;
    server_name example.com;
    ssl_certificate /path/to/chainedcert.pem;  # server certificate
    ssl_certificate_key /path/to/key;          # server key

    ssl_client_certificate /path/to/ca.pem;    # client CA
    ssl_verify_client on;
    proxy_set_header SSL_CLIENT_CERT $ssl_client_cert;

    location / {
        proxy_pass http://localhost:3000;
    }
}

Inline SVG in CSS

Yes, it is possible. Try this:

body { background-image: 
        url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='10'><linearGradient id='gradient'><stop offset='10%' stop-color='%23F00'/><stop offset='90%' stop-color='%23fcc'/> </linearGradient><rect fill='url(%23gradient)' x='0' y='0' width='100%' height='100%'/></svg>");
      }

http://jsfiddle.net/6WAtQ/

(Note that the SVG content needs to be url-escaped for this to work, e.g. # gets replaced with %23.)

This works in IE 9 (which supports SVG). Data-URLs work in older versions of IE too (with limitations), but they don’t natively support SVG.

How can I limit Parallel.ForEach?

JSON parsing using Gson for Java

One line code:

System.out.println(new Gson().fromJson(jsonLine,JsonObject.class).getAsJsonObject().get("data").getAsJsonObject().get("translations").getAsJsonArray().get(0).getAsJsonObject().get("translatedText").getAsString());

How to get a particular date format ('dd-MMM-yyyy') in SELECT query SQL Server 2008 R2

I Think this is the best way to do it.

REPLACE(CONVERT(NVARCHAR,CAST(WeekEnding AS DATETIME), 106), ' ', '-')

Because you do not have to use varchar(11) or varchar(10) that can make problem in future.

Javascript: set label text

For a dynamic approach, if your labels are always in front of your text areas:

$(object).prev("label").text(charsleft);

Best practices with STDIN in Ruby?

Following are some things I found in my collection of obscure Ruby.

So, in Ruby, a simple no-bells implementation of the Unix command cat would be:

#!/usr/bin/env ruby
puts ARGF.read

ARGF is your friend when it comes to input; it is a virtual file that gets all input from named files or all from STDIN.

ARGF.each_with_index do |line, idx|
    print ARGF.filename, ":", idx, ";", line
end

# print all the lines in every file passed via command line that contains login
ARGF.each do |line|
    puts line if line =~ /login/
end

Thank goodness we didn’t get the diamond operator in Ruby, but we did get ARGF as a replacement. Though obscure, it actually turns out to be useful. Consider this program, which prepends copyright headers in-place (thanks to another Perlism, -i) to every file mentioned on the command-line:

#!/usr/bin/env ruby -i

Header = DATA.read

ARGF.each_line do |e|
  puts Header if ARGF.pos - e.length == 0
  puts e
end

__END__
#--
# Copyright (C) 2007 Fancypants, Inc.
#++

Credit to:

One or more types required to compile a dynamic expression cannot be found. Are you missing references to Microsoft.CSharp.dll and System.Core.dll?

On your solution explorer window, right click to References, select Add Reference, go to .NET tab, find and add Microsoft.CSharp.

Alternatively add the Microsoft.CSharp NuGet package.

Install-Package Microsoft.CSharp

How to use Session attributes in Spring-mvc

Use This method very simple easy to use

HttpServletRequest request = (HttpServletRequest) context.getExternalContext().getNativeRequest();

                                                            request.getSession().setAttribute("errorMsg", "your massage");

in jsp once use then remove

<c:remove var="errorMsg" scope="session"/>

Get a json via Http Request in NodeJS

http sends/receives data as strings... this is just the way things are. You are looking to parse the string as json.

var jsonObject = JSON.parse(data);

How to parse JSON using Node.js?

How to change the size of the radio button using CSS?

Old question but now there is a simple solution, compatible with most browsers, which is to use CSS3. I tested in IE, Firefox and Chrome and it works.

input[type="radio"] {
    -ms-transform: scale(1.5); /* IE 9 */
    -webkit-transform: scale(1.5); /* Chrome, Safari, Opera */
    transform: scale(1.5);
}

Change the value 1.5, in this case an increment of 50% in size, according to your needs. If the ratio is very high, it can blur the radio button. The next image shows a ratio of 1.5.

JavaScript check if value is only undefined, null or false

The best way to do it I think is:

if(val != true){
//do something
}

This will be true if val is false, NaN, or undefined.

I want to declare an empty array in java and then I want do update it but the code is not working

You can do some thing like this,

Initialize with empty array and assign the values later

String importRt = "23:43 43:34";
if(null != importRt) {
            importArray = Arrays.stream(importRt.split(" "))
                    .map(String::trim)
                    .toArray(String[]::new);
        }

System.out.println(Arrays.toString(exportImportArray));

Hope it helps..

How to express a NOT IN query with ActiveRecord/Rails?

To expand on @Trung Lê answer, in Rails 4 you can do the following:

Topic.where.not(forum_id:@forums.map(&:id))

And you could take it a step further. If you need to first filter for only published Topics and then filter out the ids you don't want, you could do this:

Topic.where(published:true).where.not(forum_id:@forums.map(&:id))

Rails 4 makes it so much easier!

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