No. You can't send headers after they were sent. Try to use hooks in wordpress

You can query the all_tab_columns view in the database.

SELECT  table_name, column_name, data_type, data_length FROM all_tab_columns where table_name = 'CUSTOMER'

You don't have JSON. You have a JavaScript data structure consisting of objects, an array, some strings and some numbers.

Use JSON.stringify(object) to turn it into (a string of) JSON text.

the documentations refers to an ASP.NET application.
You can try and have a look at my answer here.
I have an example attached to my reply.
Another example for ASP.NET MVC3 can be found here.

I have written this article about the ICommand interface.

The idea - creating a universal command that takes two delegates: one is called when ICommand.Execute (object param) is invoked, the second checks the status of whether you can execute the command (ICommand.CanExecute (object param)).

Requires the method to switching event CanExecuteChanged. It is called from the user interface elements for switching the state CanExecute() command.

public class ModelCommand : ICommand
{
    #region Constructors

    public ModelCommand(Action<object> execute)
        : this(execute, null) { }

    public ModelCommand(Action<object> execute, Predicate<object> canExecute)
    {
        _execute = execute;
        _canExecute = canExecute;
    }

    #endregion

    #region ICommand Members

    public event EventHandler CanExecuteChanged;

    public bool CanExecute(object parameter)
    {
        return _canExecute != null ? _canExecute(parameter) : true;
    }

    public void Execute(object parameter)
    {
        if (_execute != null)
            _execute(parameter);
    }

    public void OnCanExecuteChanged()
    {
        CanExecuteChanged(this, EventArgs.Empty);
    }

    #endregion

    private readonly Action<object> _execute = null;
    private readonly Predicate<object> _canExecute = null;
}

You can use anonymous types for example:

  var empData = from res in _db.EMPLOYEEs
                where res.EMAIL == givenInfo || res.USER_NAME == givenInfo
                select new { res.EMAIL, res.USER_NAME };

The code for percent sign in NSString format is %%. This is also true for NSLog() and printf() formats.

T-SQL function to read all the integers from text and return the one at the indicated index, starting from left or right, also using a starting search term (optional):

create or alter function dbo.udf_number_from_text(
    @text nvarchar(max),
    @search_term nvarchar(1000) = N'',
    @number_position tinyint = 1,
    @rtl bit = 0
) returns int
as
    begin
        declare @result int = 0;
        declare @search_term_index int = 0;

        if @text is null or len(@text) = 0 goto exit_label;
        set @text = trim(@text);
        if len(@text) = len(@search_term) goto exit_label;

        if len(@search_term) > 0
            begin
                set @search_term_index = charindex(@search_term, @text);
                if @search_term_index = 0 goto exit_label;
            end;

        if @search_term_index > 0
            if @rtl = 0
                set @text = trim(right(@text, len(@text) - @search_term_index - len(@search_term) + 1));
            else
                set @text = trim(left(@text, @search_term_index - 1));
        if len(@text) = 0 goto exit_label;

        declare @patt_number nvarchar(10) = '%[0-9]%';
        declare @patt_not_number nvarchar(10) = '%[^0-9]%';
        declare @number_start int = 1;
        declare @number_end int;
        declare @found_numbers table (id int identity(1,1), val int);

        while @number_start > 0
        begin
            set @number_start = patindex(@patt_number, @text);
            if @number_start > 0
                begin
                    if @number_start = len(@text)
                        begin
                            insert into @found_numbers(val)
                            select cast(substring(@text, @number_start, 1) as int);

                            break;
                        end;
                    else
                        begin
                            set @text = right(@text, len(@text) - @number_start + 1);
                            set @number_end = patindex(@patt_not_number, @text);

                            if @number_end = 0
                                begin
                                    insert into @found_numbers(val)
                                    select cast(@text as int);

                                    break;
                                end;
                            else
                                begin
                                    insert into @found_numbers(val)
                                    select cast(left(@text, @number_end - 1) as int);

                                    if @number_end = len(@text)
                                        break;
                                    else
                                        begin
                                            set @text = trim(right(@text, len(@text) - @number_end));
                                            if len(@text) = 0 break;
                                        end;
                                end;
                        end;
                end;
        end;

        if @rtl = 0
            select @result = coalesce(a.val, 0)
            from (select row_number() over (order by m.id asc) as c_row, m.val
                    from @found_numbers as m) as a
            where a.c_row = @number_position;
        else
            select @result = coalesce(a.val, 0)
            from (select row_number() over (order by m.id desc) as c_row, m.val
                    from @found_numbers as m) as a
            where a.c_row = @number_position;


        exit_label:
            return @result;
    end;

Example:

select dbo.udf_number_from text(N'Text text 10 text, 25 term', N'term',2,1);

returns 10;

Use the timestamp you get by calling valueOf on the date object:

var diff = date2.valueOf() - date1.valueOf();
var diffInHours = diff/1000/60/60; // Convert milliseconds to hours

As of "ConstraintLayout1.1.0-beta1" you can use percent to define widths & heights.

android:layout_width="0dp"
app:layout_constraintWidth_default="percent"
app:layout_constraintWidth_percent=".4"

This will define the width to be 40% of the width of the screen. A combination of this and guidelines in percent allows you to create any percent-based layout you want.

Use these plugins to optimize your production build:

  new webpack.optimize.CommonsChunkPlugin('common'),
  new webpack.optimize.DedupePlugin(),
  new webpack.optimize.UglifyJsPlugin(),
  new webpack.optimize.AggressiveMergingPlugin()

I recently came to know about compression-webpack-plugin which gzips your output bundle to reduce its size. Add this as well in the above listed plugins list to further optimize your production code.

new CompressionPlugin({
      asset: "[path].gz[query]",
      algorithm: "gzip",
      test: /\.js$|\.css$|\.html$/,
      threshold: 10240,
      minRatio: 0.8
})

Server side dynamic gzip compression is not recommended for serving static client-side files because of heavy CPU usage.

Something else that was not obvious, to me at least, was that the when using Mongoose's third parameter to avoid replacing the actual collection with a new one with the same name, the new Schema(...) is actually only a placeholder, and doesn't interfere with the exisitng schema so

var User = mongoose.model('User', new Schema({ url: String, text: String, id: Number}, { collection : 'users' }));   // collection name;
User.find({}, function(err, data) { console.log(err, data, data.length);});

works fine and returns all fields - even if the actual (remote) Schema contains none of these fields. Mongoose will still want it as new Schema(...), and a variable almost certainly won't hack it.

Have you tried getFilesDir().getAbsolutePath()?

Seems you fixed your problem by initializing the File object with a full path. I believe this would also do the trick.

If you use setState inside componentDidUpdate it updates the component, resulting in a call to componentDidUpdate which subsequently calls setState again resulting in the infinite loop. You should conditionally call setState and ensure that the condition violating the call occurs eventually e.g:

componentDidUpdate: function() {
    if (condition) {
        this.setState({..})
    } else {
        //do something else
    }
}

In case you are only updating the component by sending props to it(it is not being updated by setState, except for the case inside componentDidUpdate), you can call setState inside componentWillReceiveProps instead of componentDidUpdate.

Try this method then you can do every thing you want.
It is like a stack so be careful which item comes first or last.

<?xml version="1.0" encoding="utf-8"?>
<layer-list
xmlns:android="http://schemas.android.com/apk/res/android">
<item android:right="50dp" android:start="10dp" android:left="10dp">
    <shape
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:shape="rectangle">
        <corners android:radius="3dp" />
        <solid android:color="#012d08"/>
    </shape>
</item>
<item android:top="50dp">
    <shape android:shape="rectangle">
        <solid android:color="#7c4b4b" />
    </shape>
</item>
<item android:top="90dp" android:end="60dp">
    <shape android:shape="rectangle">
        <solid android:color="#e2cc2626" />
    </shape>
</item>
<item android:start="50dp" android:bottom="20dp" android:top="120dp">
    <shape android:shape="rectangle">
        <solid android:color="#360e0e" />
    </shape>
</item>

1. Use npm/bower to install bootstrap if you want to recompile it/change less files/test. With grunt it would be easier to do this, as shown on http://getbootstrap.com/getting-started/#grunt. If you only want to add precompiled libraries feel free to manually include files to project.

2. No, you have to do this by yourself or use separate grunt tool. For example 'grunt-contrib-concat' How to concatenate and minify multiple CSS and JavaScript files with Grunt.js (0.3.x)

There is also complications in partial views where there is an error on the page that is not recognized immediately. Like Model.SomeValue instead of Model.ThisValue. It might not underline and cause problems in debugging. This can be a real pain to catch.

[2017-07-25] since this continues to be the accepted answer, despite being a very hacky solution, I'm incorporating Gabi's code into it, leaving my own to serve as a bad example.

// my hacky approach:
function get_content() {
  var html = document.getElementById("txt").innerHTML;
  document.getElementById("txt").innerHTML = html.replace(/<[^>]*>/g, "");
}
// Gabi's elegant approach, but eliminating one unnecessary line of code:
function gabi_content() {
  var element = document.getElementById('txt');
  element.innerHTML = element.innerText || element.textContent;
}
// and exploiting the fact that IDs pollute the window namespace:
function txt_content() {
  txt.innerHTML = txt.innerText || txt.textContent;
}

.A {
  background: blue;
}

.B {
  font-style: italic;
}

.C {
  font-weight: bold;
}

<input type="button" onclick="get_content()" value="Get Content (bad)" />
<input type="button" onclick="gabi_content()" value="Get Content (good)" />
<input type="button" onclick="txt_content()" value="Get Content (shortest)" />
<p id='txt'>
  <span class="A">I am</span>
  <span class="B">working in </span>
  <span class="C">ABC company.</span>
</p>

It is called an array initializer and can be explained in the Java specification 10.6.

This can be used to initialize any array, but it can only be used for initialization (not assignment to an existing array). One of the unique things about it is that the dimensions of the array can be determined from the initializer. Other methods of creating an array require you to manually insert the number. In many cases, this helps minimize trivial errors which occur when a programmer modifies the initializer and fails to update the dimensions.

Basically, the initializer allocates a correctly sized array, then goes from left to right evaluating each element in the list. The specification also states that if the element type is an array (such as it is for your case... we have an array of double[]), that each element may, itself be an initializer list, which is why you see one outer set of braces, and each line has inner braces.

In my case, the FocusExtension didn't work until I change the method OnIsFocusedPropertyChanged. The original one was working only in debug when a break point stopped the process. At runtime, the process is too quick and nothing happend. With this little modification and the help of our friend Task, this is working fine in both scenarios.

private static void OnIsFocusedPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
  var uie = (UIElement)d;
  if ((bool)e.NewValue)
  {
    var action = new Action(() => uie.Dispatcher.BeginInvoke((Action)(() => uie.Focus())));
    Task.Factory.StartNew(action);
  }
}

Use LINQ OrderByDescending method. It returns IOrderedIEnumerable<int>, which you can convert back to Array if you need so. Generally, List<>s are more functional then Arrays.

array = array.OrderByDescending(c => c).ToArray();

Very Straightforward!

function parseQueryString(){
    var assoc = {};
    var keyValues = location.search.slice(1).split('&');
    var decode = function(s){
        return decodeURIComponent(s.replace(/\+/g, ' '));
    };

    for (var i = 0; i < keyValues.length; ++i) {
        var key = keyValues[i].split('=');
        if (1 < key.length) {
            assoc[decode(key[0])] = decode(key[1]);
        }
    }

    return assoc;
}

It might be safer to directly pass environment variables to maven system properties. For example, say on Linux you want to access environment variable MY_VARIABLE. You can use a system property in your pom file.

<properties>
    ...
    <!-- Default value for my.variable can be defined here -->
    <my.variable>foo</my.variable>
    ...
</properties>
...
<!-- Use my.variable -->
... ${my.variable} ...

Set the property value on the maven command line:

mvn clean package -Dmy.variable=$MY_VARIABLE

You should use ButterKnife Library http://jakewharton.github.io/butterknife/

And use it like

@InjectView(R.id.texto)
TextView err;

in onCreate method

ButterKnife.inject(this)
err.setText("Escriba su mensaje y luego seleccione el canal.");

I think the possibilities are less, but FireBug (addon of FireFox) has some network analysis tools, too.

there should has a concurrent implemention of List interface supporting such operation.

try java.util.concurrent.CopyOnWriteArrayList.class

I too had that same problem.. If we think logically little bit we can get the answer.. It worked for me very well.. I hope u will get it..

1. listviewdemo.xml

   <ListView
       android:id="@+id/listview"
       android:layout_width="match_parent"
       android:layout_height="match_parent"
       android:paddingBottom="30dp"
       android:paddingLeft="10dp"
       android:paddingRight="10dp" />
   

2. listviewcontent.xml - note that TextView - android:id="@+id/txtLstItem"

   <LinearLayout
       android:id="@+id/listviewcontentlayout"
       android:layout_width="0dp"
       android:layout_height="fill_parent"
       android:layout_weight="1"
       android:orientation="horizontal">
   
       <ImageView
           android:id="@+id/img1"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:layout_marginRight="6dp" />
   
       <LinearLayout
           android:layout_width="0dp"
           android:layout_height="fill_parent"
           android:layout_weight="1"
           android:orientation="vertical">
   
           <TextView
               android:id="@+id/txtLstItem"
               android:layout_width="match_parent"
               android:layout_height="wrap_content"
               android:gravity="left"
               android:shadowColor="@android:color/black"
               android:shadowRadius="5"
               android:textColor="@android:color/white" />
   
       </LinearLayout>
   
       <ImageView
           android:id="@+id/img2"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:layout_marginRight="6dp" />
   </LinearLayout>
   

3. ListViewActivity.java - Note that view.findViewById(R.id.txtLstItem) - as we setting the value to TextView by setText() method we getting text from TextView by View object returned by onItemClick method. OnItemClick() returns the current view.

   TextView v=(TextView) view.findViewById(R.id.txtLstItem);
   Toast.makeText(getApplicationContext(), "selected Item Name is "+v.getText(), Toast.LENGTH_LONG).show();**
   

   Using this simple logic we can get other values like CheckBox, RadioButton, ImageView etc.

   ListView List = (ListView) findViewById(R.id.listview);
   cursor = cr.query(CONTENT_URI,projection,null,null,null);
   adapter = new ListViewCursorAdapter(ListViewActivity.this, R.layout.listviewcontent, cursor, from, to);
   
   cursor.moveToFirst();
   
   // Let activity manage the cursor
   startManagingCursor(cursor);
   
   List.setAdapter(adapter);
   List.setOnItemClickListener(new AdapterView.OnItemClickListener() {
           @Override
           public void onItemClick (AdapterView < ? > adapter, View view,int position, long arg){
               // TODO Auto-generated method stub
               TextView v = (TextView) view.findViewById(R.id.txtLstItem);
               Toast.makeText(getApplicationContext(), "selected Item Name is " + v.getText(), Toast.LENGTH_LONG).show();
           }
       }
   );
   

use textstyle property as bold

android:textStyle = "bold";

The facebook acess token looks similar too "1249203702|2.h1MTNeLqcLqw__.86400.129394400-605430316|-WE1iH_CV-afTgyhDPc"

if you extract the middle part by using | to split you get

2.h1MTNeLqcLqw__.86400.129394400-605430316

then split again by -

the last part 605430316 is the user id.

Here is the C# code to extract the user id from the access token:

   public long ParseUserIdFromAccessToken(string accessToken)
   {
        Contract.Requires(!string.isNullOrEmpty(accessToken);

        /*
         * access_token:
         *   1249203702|2.h1MTNeLqcLqw__.86400.129394400-605430316|-WE1iH_CV-afTgyhDPc
         *                                               |_______|
         *                                                   |
         *                                                user id
         */

        long userId = 0;

        var accessTokenParts = accessToken.Split('|');

        if (accessTokenParts.Length == 3)
        {
            var idPart = accessTokenParts[1];
            if (!string.IsNullOrEmpty(idPart))
            {
                var index = idPart.LastIndexOf('-');
                if (index >= 0)
                {
                    string id = idPart.Substring(index + 1);
                    if (!string.IsNullOrEmpty(id))
                    {
                        return id;
                    }
                }
            }
        }

        return null;
    }

WARNING: The structure of the access token is undocumented and may not always fit the pattern above. Use it at your own risk.

Update Due to changes in Facebook. the preferred method to get userid from the encrypted access token is as follows:

try
{
    var fb = new FacebookClient(accessToken);
    var result = (IDictionary<string, object>)fb.Get("/me?fields=id");
    return (string)result["id"];
}
catch (FacebookOAuthException)
{
    return null;
}

Since performance.navigation is now deprecated, you can try this:

var perfEntries = performance.getEntriesByType("navigation");

if (perfEntries[0].type === "back_forward") {
    location.reload(true);
}

SYSDATE returns the system date, of the system on which the database resides

CURRENT_TIMESTAMP returns the current date and time in the session time zone, in a value of datatype TIMESTAMP WITH TIME ZONE

execute this comman

    ALTER SESSION SET TIME_ZONE = '+3:0';

and it will provide you the same result.

Something like this should work

var text = $('#toptitle').text();
if (text == 'Profil'){
    $('#toptitle').text('New Word');
}

If you use UPPER(text), the like '%lah%' will always return zero results. Use '%LAH%'.

I had the same problem. I changed the localhost parameter in the mysqli object to '127.0.0.1' instead of writing 'localhost'. It worked; I’m not sure how or why.

$db_connection = new mysqli("127.0.0.1","root","","db_name");

Hope it helps.

Yes, but not with that version of the constructor. You can do this:

>>> dict([(1, 2), (3, 4)])
{1: 2, 3: 4}

There are several different ways to make a dict. As documented, "providing keyword arguments [...] only works for keys that are valid Python identifiers."

check this: https://github.com/luciotato/waitfor-ES6

your code with wait.for: (requires generators, --harmony flag)

function* (query) {
  var r = yield wait.for( myApi.exec, 'SomeCommand');
  return r;
}

Just avoid using an interface:

public interface MyConstants {
    String CONSTANT_ONE = "foo";
}

public class NeddsConstant implements MyConstants {

}

It is tempting, but violates encapsulation and blurs the distinction of class definitions.

In general, interfaces are used only in languages that use the single-inheritance class model. In these single-inheritance languages, interfaces are typically used if any class could use a particular method or set of methods. Also in these single-inheritance languages, abstract classes are used to either have defined class variables in addition to none or more methods, or to exploit the single-inheritance model to limit the range of classes that could use a set of methods.

Languages that support the multiple-inheritance model tend to use only classes or abstract base classes and not interfaces. Since Python supports multiple inheritance, it does not use interfaces and you would want to use base classes or abstract base classes.

http://docs.python.org/library/abc.html

I have just resolved the problem myself on mint(ubuntu). It seems that adb is a 32 bit executable at least according to readelf -h. for the program to work in 64-bit ubuntu or whatever installation, we must have 32-bit libraries inplace.

solved the problem with

sudo dpkg --add-architecture i386
sudo apt-get update
sudo apt-get install libc6:i386 libncurses5:i386 libstdc++6:i386

Recent protocols prefer usage of RFC3339 per golang time package documentation.

In general RFC1123Z should be used instead of RFC1123 for servers that insist on that format, and RFC3339 should be preferred for new protocols. RFC822, RFC822Z, RFC1123, and RFC1123Z are useful for formatting; when used with time.Parse they do not accept all the time formats permitted by the RFCs.

cutOffTime, _ := time.Parse(time.RFC3339, "2017-08-30T13:35:00Z")
// POSTDATE is a date time field in DB (datastore)
query := datastore.NewQuery("db").Filter("POSTDATE >=", cutOffTime).

Generally, The DNS Domain of the URL MUST match the Certificate Subject of the certificate.

In former times this could be either by setting the domain as cn of the certificate or by having the domain set as a Subject Alternative Name.

Support for cn was deprecated for a long time (since 2000 in RFC 2818) and Chrome browser will not even look at the cn anymore so today you need to have the DNS Domain of the URL as a Subject Alternative Name.

RFC 6125 which forbids checking the cn if SAN for DNS Domain is present, but not if SAN for IP Address is present. RFC 6125 also repeats that cn is deprecated which was already said in RFC 2818. And the Certification Authority Browser Forum to be present which in combination with RFC 6125 essentially means that cn will never be checked for DNS Domain name.

protected void DescargarArchivo(string strRuta, string strFile)
{
    FileInfo ObjArchivo = new System.IO.FileInfo(strRuta);
    Response.Clear();
    Response.AddHeader("Content-Disposition", "attachment; filename=" + strFile);
    Response.AddHeader("Content-Length", ObjArchivo.Length.ToString());
    Response.ContentType = "application/pdf";
    Response.WriteFile(ObjArchivo.FullName);
    Response.End();


}

You will need to use any javascript html calendar widget.

try this calendar view widget, just copy-paste some code shown in example there and thats it what you want.

Here is the link to Jquery Mobile date box - JQM datebox

I found this code where date is compared in a format to compare with date field in database...may be this might be helpful to you...

When you convert the string to date using simpledateformat, it is hard to compare with the Date field in mysql databases.

So convert the java string date in the format using select STR_to_DATE('yourdate','%m/%d/%Y') --> in this format, then you will get the exact date format of mysql date field.

http://javainfinite.com/java/java-convert-string-to-date-and-compare/

What about having different names for your dev and prod servers? That should avoid any confusions and you'd not have to edit the hosts file every time.

If you are concerned about randomness and not about speed, you should use a secure random number generation method. There are several ways to do this... The easiest one being to use OpenSSL's Random Number Generator.

You can also write your own using an encryption algorithm (like AES). By picking a seed and an IV and then continuously re-encrypting the output of the encryption function. Using OpenSSL is easier, but less manly.

use this command /usr/libexec/java_home to check the JAVA_HOME

db.users.count()
db.users.remove({})
db.users.count()

Tested on Android 9.0 version

None of the answers worked for me . This is the final thing worked

import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.FrameLayout;
import android.widget.ProgressBar;

public class MainActivity extends AppCompatActivity {

    WebView mWebView;


    @SuppressLint("SetJavaScriptEnabled")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        mWebView = (WebView) findViewById(R.id.webView);


        mWebView.setWebViewClient(new WebViewClient());
        mWebView.setWebChromeClient(new MyChrome());
        WebSettings webSettings = mWebView.getSettings();
        webSettings.setJavaScriptEnabled(true);
        webSettings.setAllowFileAccess(true);
        webSettings.setAppCacheEnabled(true);

       if (savedInstanceState == null) {
          mWebView.loadUrl("https://www.youtube.com/");
       }

    }


    private class MyChrome extends WebChromeClient {

        private View mCustomView;
        private WebChromeClient.CustomViewCallback mCustomViewCallback;
        protected FrameLayout mFullscreenContainer;
        private int mOriginalOrientation;
        private int mOriginalSystemUiVisibility;

        MyChrome() {}

        public Bitmap getDefaultVideoPoster()
        {
            if (mCustomView == null) {
                return null;
            }
            return BitmapFactory.decodeResource(getApplicationContext().getResources(), 2130837573);
        }

        public void onHideCustomView()
        {
            ((FrameLayout)getWindow().getDecorView()).removeView(this.mCustomView);
            this.mCustomView = null;
            getWindow().getDecorView().setSystemUiVisibility(this.mOriginalSystemUiVisibility);
            setRequestedOrientation(this.mOriginalOrientation);
            this.mCustomViewCallback.onCustomViewHidden();
            this.mCustomViewCallback = null;
        }

        public void onShowCustomView(View paramView, WebChromeClient.CustomViewCallback paramCustomViewCallback)
        {
            if (this.mCustomView != null)
            {
                onHideCustomView();
                return;
            }
            this.mCustomView = paramView;
            this.mOriginalSystemUiVisibility = getWindow().getDecorView().getSystemUiVisibility();
            this.mOriginalOrientation = getRequestedOrientation();
            this.mCustomViewCallback = paramCustomViewCallback;
            ((FrameLayout)getWindow().getDecorView()).addView(this.mCustomView, new FrameLayout.LayoutParams(-1, -1));
            getWindow().getDecorView().setSystemUiVisibility(3846 | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
        }
    }

 @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        mWebView.saveState(outState);
    }

    @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
        super.onRestoreInstanceState(savedInstanceState);
        mWebView.restoreState(savedInstanceState);
    }
}

In AndroidManifest.xml

<activity
  android:name=".MainActivity"
  android:configChanges="orientation|screenSize" />

Source Monster Techno

They both work the same way, but $_POST should be used as it is cleaner. You can add isset() to it to check it exists.

Place the body of your loop after the while and before the test. The actual body of the while loop should be a no-op.

while 
    check_if_file_present
    #do other stuff
    (( current_time <= cutoff ))
do
    :
done

Instead of the colon, you can use continue if you find that more readable. You can also insert a command that will only run between iterations (not before first or after last), such as echo "Retrying in five seconds"; sleep 5. Or print delimiters between values:

i=1; while printf '%d' "$((i++))"; (( i <= 4)); do printf ','; done; printf '\n'

I changed the test to use double parentheses since you appear to be comparing integers. Inside double square brackets, comparison operators such as <= are lexical and will give the wrong result when comparing 2 and 10, for example. Those operators don't work inside single square brackets.

You can do this :

    df <- data.frame("a" = c(1,2,3,4), "b" = c(4,3,2,1), "x_ind" = c(1,0,1,1), "y_ind" = c(0,0,1,1), "z_ind" = c(0,1,1,1) )
df %>% mutate( bi  = ifelse((df$x_ind + df$y_ind +df$z_ind)== 3, 1,0 ))

1. Why does the getOne(id) method fail?

See this section in the docs. You overriding the already in place transaction might be causing the issue. However, without more info this one is difficult to answer.

2. When I should use the getOne(id) method?

Without digging into the internals of Spring Data JPA, the difference seems to be in the mechanism used to retrieve the entity.

If you look at the JavaDoc for getOne(ID) under See Also:

See Also:
EntityManager.getReference(Class, Object)

it seems that this method just delegates to the JPA entity manager's implementation.

However, the docs for findOne(ID) do not mention this.

The clue is also in the names of the repositories. JpaRepository is JPA specific and therefore can delegate calls to the entity manager if so needed. CrudRepository is agnostic of the persistence technology used. Look here. It's used as a marker interface for multiple persistence technologies like JPA, Neo4J etc.

So there's not really a 'difference' in the two methods for your use cases, it's just that findOne(ID) is more generic than the more specialised getOne(ID). Which one you use is up to you and your project but I would personally stick to the findOne(ID) as it makes your code less implementation specific and opens the doors to move to things like MongoDB etc. in the future without too much refactoring :)

When you have replace: true you get the following piece of DOM:

<div ng-controller="Ctrl" class="ng-scope">
    <div class="ng-binding">hello</div>
</div>

whereas, with replace: false you get this:

<div ng-controller="Ctrl" class="ng-scope">
    <my-dir>
        <div class="ng-binding">hello</div>
    </my-dir>
</div>

So the replace property in directives refer to whether the element to which the directive is being applied (<my-dir> in that case) should remain (replace: false) and the directive's template should be appended as its child,

OR

the element to which the directive is being applied should be replaced (replace: true) by the directive's template.

In both cases the element's (to which the directive is being applied) children will be lost. If you wanted to perserve the element's original content/children you would have to translude it. The following directive would do it:

.directive('myDir', function() {
    return {
        restrict: 'E',
        replace: false,
        transclude: true,
        template: '<div>{{title}}<div ng-transclude></div></div>'
    };
});

In that case if in the directive's template you have an element (or elements) with attribute ng-transclude, its content will be replaced by the element's (to which the directive is being applied) original content.

See example of translusion http://plnkr.co/edit/2DJQydBjgwj9vExLn3Ik?p=preview

See this to read more about translusion.

This happens when you push first time without net connection or poor net connection.But when you try again using good connection 2,3 times problem will be solved.

Both if (one.length() > 0) {} and if (!"".equals(one)) {} will check against an empty foo parameter, and an empty parameter is what you'd get if the the form is submitted with no value in the foo text field.

If there's any chance you can use the Expression Language to handle the parameter, you could access it with empty param.foo in an expression.

<c:if test='${not empty param.foo}'>
    This page code gets rendered.
</c:if>

Technically yes, but if a string makes sense to be the primary key then you should probably use it. This all depends on the size of the table you're making it for and the length of the string that is going to be the primary key (longer strings == harder to compare). I wouldn't necessarily use a string for a table that has millions of rows, but the amount of performance slowdown you'll get by using a string on smaller tables will be minuscule to the headaches that you can have by having an integer that doesn't mean anything in relation to the data.

To get this i tried following code :

  protected T GetObject<T>()
    {
        T obj = default(T);
        obj =Activator.CreateInstance<T>();
        return obj ;
    }

Assuming for example DataGridView has columns as given below and its data bound items are of type PrimalPallet you can use solution given below.

private void dataGridView1_CellContentClick( object sender, DataGridViewCellEventArgs e )
{
    if ( e.RowIndex >= 0 )
    {
        if ( e.ColumnIndex == this.colDelete.Index )
        {
            var pallet = this.dataGridView1.Rows[ e.RowIndex ].DataBoundItem as PrimalPallet;
            this.DeletePalletByID( pallet.ID );
        }
        else if ( e.ColumnIndex == this.colEdit.Index )
        {
            var pallet = this.dataGridView1.Rows[ e.RowIndex ].DataBoundItem as PrimalPallet;
            // etc.
        }
    }
}

It's safer to access columns directly rather than using dataGridView1.Columns["MyColumnName"] and there is no need to parse sender to the DataGridView as it's not needed.

This is an example to use ONLY p12 file it's not optimazed but it work. The pkcs12 file where generated by OpenSSL by me. Example how to load p12 file and build Trust zone from it... It outputs certificates from p12 file and add good certs to TrustStore

KeyStore ks=KeyStore.getInstance("pkcs12");
ks.load(new FileInputStream("client_t_c1.p12"),"c1".toCharArray());

KeyStore jks=KeyStore.getInstance("JKS");
jks.load(null);

for (Enumeration<String>t=ks.aliases();t.hasMoreElements();)
{
    String alias = t.nextElement();
    System.out.println("@:" + alias);
    if (ks.isKeyEntry(alias)){
        Certificate[] a = ks.getCertificateChain(alias);
        for (int i=0;i<a.length;i++)
        {
            X509Certificate x509 = (X509Certificate)a[i];
            System.out.println(x509.getSubjectDN().toString());
            if (i>0)
                jks.setCertificateEntry(x509.getSubjectDN().toString(), x509);
            System.out.println(ks.getCertificateAlias(x509));
            System.out.println("ok");
        }
    }
}

System.out.println("init Stores...");

KeyManagerFactory kmf=KeyManagerFactory.getInstance("SunX509");
kmf.init(ks, "c1".toCharArray());

TrustManagerFactory tmf=TrustManagerFactory.getInstance("SunX509");
tmf.init(jks);

SSLContext ctx = SSLContext.getInstance("TLS");
ctx.init(kmf.getKeyManagers(), tmf.getTrustManagers(), null);

In ASP.NET, when should I use Session.Clear() rather than Session.Abandon()?

Session.Abandon() destroys the session and the Session_OnEnd event is triggered.

Session.Clear() just removes all values (content) from the Object. The session with the same key is still alive.

So, if you use Session.Abandon(), you lose that specific session and the user will get a new session key. You could use it for example when the user logs out.

Use Session.Clear(), if you want that the user remaining in the same session (if you don't want him to relogin for example) and reset all his session specific data.

What is the difference between Session.Abandon() and Session.Clear()

Clear - Removes all keys and values from the session-state collection.

Abandon - removes all the objects stored in a Session. If you do not call the Abandon method explicitly, the server removes these objects and destroys the session when the session times out. It also raises events like Session_End.

Session.Clear can be compared to removing all books from the shelf, while Session.Abandon is more like throwing away the whole shelf.

...

Generally, in most cases you need to use Session.Clear. You can use Session.Abandon if you are sure the user is going to leave your site.

So back to the differences:

• Abandon raises Session_End request.
• Clear removes items immediately, Abandon does not.
• Abandon releases the SessionState object and its items so it can garbage collected.
• Clear keeps SessionState and resources associated with it.

Session.Clear() or Session.Abandon() ?

You use Session.Clear() when you don't want to end the session but rather just clear all the keys in the session and reinitialize the session.

Session.Clear() will not cause the Session_End eventhandler in your Global.asax file to execute.

But on the other hand Session.Abandon() will remove the session altogether and will execute Session_End eventhandler.

Session.Clear() is like removing books from the bookshelf

Session.Abandon() is like throwing the bookshelf itself.

Question

I check on some sessions if not equal null in the page load. if one of them equal null i wanna to clear all the sessions and redirect to the login page?

Answer

If you want the user to login again, use Session.Abandon.

Difference is static variables are those variables: which allows a value to be retained from one call of the function to another. But in case of local variables the scope is till the block/ function lifetime.

For Example:

#include <stdio.h>

void func() {
    static int x = 0; // x is initialized only once across three calls of func()
    printf("%d\n", x); // outputs the value of x
    x = x + 1;
}

int main(int argc, char * const argv[]) {
    func(); // prints 0
    func(); // prints 1
    func(); // prints 2
    return 0;
}

In Chrome Dev Tools you can run the following:

$x("some xpath")

Guys I found the issue

I just tried by adding the qualifier name in employee service finally it solved my issue.

@Service("employeeService")

public class EmployeeServiceImpl implements EmployeeService{

}

This is what you may want

$       echo "continuation"\
>       "lines"
continuation lines

If this creates two arguments to echo and you only want one, then let's look at string concatenation. In bash, placing two strings next to each other concatenate:

$ echo "continuation""lines"
continuationlines

So a continuation line without an indent is one way to break up a string:

$ echo "continuation"\
> "lines"
continuationlines

But when an indent is used:

$       echo "continuation"\
>       "lines"
continuation lines

You get two arguments because this is no longer a concatenation.

If you would like a single string which crosses lines, while indenting but not getting all those spaces, one approach you can try is to ditch the continuation line and use variables:

$ a="continuation"
$ b="lines"
$ echo $a$b
continuationlines

This will allow you to have cleanly indented code at the expense of additional variables. If you make the variables local it should not be too bad.

Null is similar to zero pointer in C++. So it is a reference which not pointing to any value.

DBNull.Value is completely different and is a constant which is returned when a field value contains NULL.

In response to the above post I think it needs this line instead of your line:-

var strMethodUrl = '@Url.Action("SubMenu_Click", "Logging")?param1='+value1+' &param2='+value2

Or else you send the actual strings value1 and value2 to the controller.

However, for me, it only calls the controller once. It seems to hit 'receieveResponse' each time, but a break point on the controller method shows it is only hit 1st time until a page refresh.

Here is a working solution. For the cshtml page:-

   <button type="button" onclick="ButtonClick();"> Call &raquo;</button>

<script>
    function ButtonClick()
    {
        callControllerMethod2("1", "2");
    }
    function callControllerMethod2(value1, value2)
    {
        var response = null;
        $.ajax({
            async: true,
            url: "Logging/SubMenu_Click?param1=" + value1 + " &param2=" + value2,
            cache: false,
            dataType: "json",
            success: function (data) { receiveResponse(data); }
        });
    }
    function receiveResponse(response)
    {
        if (response != null)
        {
            for (var i = 0; i < response.length; i++)
            {
                alert(response[i].Data);
            }
        }
    }
</script>

And for the controller:-

public class A
{
    public string Id { get; set; }
    public string Data { get; set; }

}
public JsonResult SubMenu_Click(string param1, string param2)
{
    A[] arr = new A[] {new A(){ Id = "1", Data = DateTime.Now.Millisecond.ToString() } };
    return Json(arr , JsonRequestBehavior.AllowGet);
}

You can see the time changing each time it is called, so there is no caching of the values...

Is this what you're looking for tree? It should be in most distributions (maybe as an optional install).

~> tree -d /proc/self/
/proc/self/
|-- attr
|-- cwd -> /proc
|-- fd
|   `-- 3 -> /proc/15589/fd
|-- fdinfo
|-- net
|   |-- dev_snmp6
|   |-- netfilter
|   |-- rpc
|   |   |-- auth.rpcsec.context
|   |   |-- auth.rpcsec.init
|   |   |-- auth.unix.gid
|   |   |-- auth.unix.ip
|   |   |-- nfs4.idtoname
|   |   |-- nfs4.nametoid
|   |   |-- nfsd.export
|   |   `-- nfsd.fh
|   `-- stat
|-- root -> /
`-- task
    `-- 15589
        |-- attr
        |-- cwd -> /proc
        |-- fd
        | `-- 3 -> /proc/15589/task/15589/fd
        |-- fdinfo
        `-- root -> /

27 directories

sample taken from maintainer's web page.

You can add the option -L # where # is replaced by a number, to specify the max recursion depth.

Remove -d to display also files.

There are multiple ways to fix the same. PFB two of them -

1st Way using position: fixed - position: fixed; positions relative to the viewport, which means it always stays in the same place even if the page is scrolled. Adding the left and top value to 50% will place it into the middle of the screen.

 button {
   position: fixed;
   left: 50%;
   top:50%;
 }

2nd Way using margin: auto -margin: 0 auto; for horizontal centering, but margin: auto; has refused to work for vertical centering… until now! But actually absolute centering only requires a declared height and these styles:

button {
  margin: auto;
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  height: 40px;
}

The only way I could do it in VS 2010 IDE was to highlight the block of code and hit ctrl-E and then C

From this post: How to deal with floating point number precision in JavaScript?

You have a few options:

• Use a special datatype for decimals, like decimal.js
• Format your result to some fixed number of significant digits, like this: (Math.floor(y/x) * x).toFixed(2)
• Convert all your numbers to integers

Simply use the base transpose function t, wrapped with as.data.frame:

final_df <- as.data.frame(t(starting_df))
final_df
     A    B    C    D
a    1    2    3    4
b 0.02 0.04 0.06 0.08
c Aaaa Bbbb Cccc Dddd

Above updated. As docendo discimus pointed out, t returns a matrix. As Mark suggested wrapping it with as.data.frame gets back a data frame instead of a matrix. Thanks!

Expanding on Ender's answer, let's explore our options with the improvements from ES2015.

First off, the problem in the asker's code is the fact that setTimeout is asynchronous while loops are synchronous. So the logical flaw is that they wrote multiple calls to an asynchronous function from a synchronous loop, expecting them to execute synchronously.

function slide() {
    var num = 0;
    for (num=0;num<=10;num++) {
        setTimeout("document.getElementById('container').style.marginLeft='-600px'",3000);
        setTimeout("document.getElementById('container').style.marginLeft='-1200px'",6000);
        setTimeout("document.getElementById('container').style.marginLeft='-1800px'",9000);
        setTimeout("document.getElementById('container').style.marginLeft='0px'",12000);
    }
}

What happens in reality, though, is that...

• The loop "simultaneously" creates 44 async timeouts set to execute 3, 6, 9 and 12 seconds in the future. Asker expected the 44 calls to execute one-after-the-other, but instead, they all execute simultaneously.
• 3 seconds after the loop finishes, container's marginLeft is set to "-600px" 11 times.
• 3 seconds after that, marginLeft is set to "-1200px" 11 times.
• 3 seconds later, "-1800px", 11 times.

And so on.

You could solve this by changing it to:

function setMargin(margin){
    return function(){
        document.querySelector("#container").style.marginLeft = margin;
    };
}

function slide() {
    for (let num = 0; num <= 10; ++num) {
        setTimeout(setMargin("-600px"), + (3000 * (num + 1)));
        setTimeout(setMargin("-1200px"), + (6000 * (num + 1)));
        setTimeout(setMargin("-1800px"), + (9000 * (num + 1)));
        setTimeout(setMargin("0px"), + (12000 * (num + 1)));
    }
}

But that is just a lazy solution that doesn't address the other issues with this implementation. There's a lot of hardcoding and general sloppiness here that ought to be fixed.

Lessons learnt from a decade of experience

As mentioned at the top of this answer, Ender already proposed a solution, but I would like to add on to it, to factor in good practice and modern innovations in the ECMAScript specification.

function format(str, ...args){
    return str.split(/(%)/).map(part => (part == "%") ? (args.shift()) : (part)).join("");
}

function slideLoop(margin, selector){
    const multiplier = -600;
    let contStyle = document.querySelector(selector).style;

    return function(){
        margin = ++margin % 4;
        contStyle.marginLeft = format("%px", margin * multiplier);
    }
}

function slide() {    
    return setInterval(slideLoop(0, "#container"), 3000);
}

Let's go over how this works for the total beginners (note that not all of this is directly related to the question):

format

function format

It's immensely useful to have a printf-like string formatter function in any language. I don't understand why JavaScript doesn't seem to have one.

format(str, ...args)

... is a snazzy feature added in ES6 that lets you do lots of stuff. I believe it's called the spread operator. Syntax: ...identifier or ...array. In a function header, you can use it to specify variable arguments, and it will take every argument at and past the position of said variable argument, and stuff them into an array. You can also call a function with an array like so: args = [1, 2, 3]; i_take_3_args(...args), or you can take an array-like object and transform it into an array: ...document.querySelectorAll("div.someclass").forEach(...). This would not be possible without the spread operator, because querySelectorAll returns an "element list", which isn't a true array.

str.split(/(%)/)

I'm not good at explaining how regex works. JavaScript has two syntaxes for regex. There's the OO way (new RegExp("regex", "gi")) and there's the literal way (/insert regex here/gi). I have a profound hatred for regex because the terse syntax it encourages often does more harm than good (and also because they're extremely non-portable), but there are some instances where regex is helpful, like this one. Normally, if you called split with "%" or /%/, the resulting array would exclude the "%" delimiters from the array. But for the algorithm used here, we need them included. /(%)/ was the first thing I tried and it worked. Lucky guess, I suppose.

.map(...)

map is a functional idiom. You use map to apply a function to a list. Syntax: array.map(function). Function: must return a value and take 1-2 arguments. The first argument will be used to hold each value in the array, while the second will be used to hold the current index in the array. Example: [1,2,3,4,5].map(x => x * x); // returns [1,4,9,16,25]. See also: filter, find, reduce, forEach.

part => ...

This is an alternative form of function. Syntax: argument-list => return-value, e.g. (x, y) => (y * width + x), which is equivalent to function(x, y){return (y * width + x);}.

(part == "%") ? (args.shift()) : (part)

The ?: operator pair is a 3-operand operator called the ternary conditional operator. Syntax: condition ? if-true : if-false, although most people call it the "ternary" operator, since in every language it appears in, it's the only 3-operand operator, every other operator is binary (+, &&, |, =) or unary (++, ..., &, *). Fun fact: some languages (and vendor extensions of languages, like GNU C) implement a two-operand version of the ?: operator with syntax value ?: fallback, which is equivalent to value ? value : fallback, and will use fallback if value evaluates to false. They call it the Elvis Operator.

I should also mention the difference between an expression and an expression-statement, as I realize this may not be intuitive to all programmers. An expression represents a value, and can be assigned to an l-value. An expression can be stuffed inside parentheses and not be considered a syntax error. An expression can itself be an l-value, although most statements are r-values, as the only l-value expressions are those formed from an identifier or (e.g. in C) from a reference/pointer. Functions can return l-values, but don't count on it. Expressions can also be compounded from other, smaller expressions. (1, 2, 3) is an expression formed from three r-value expressions joined by two comma operators. The value of the expression is 3. expression-statements, on the other hand, are statements formed from a single expression. ++somevar is an expression, as it can be used as the r-value in the assignment expression-statement newvar = ++somevar; (the value of the expression newvar = ++somevar, for example, is the value that gets assigned to newvar). ++somevar; is also an expression-statement.

If ternary operators confuse you at all, apply what I just said to the ternary operator: expression ? expression : expression. Ternary operator can form an expression or an expression-statement, so both of these things:

smallest = (a < b) ? (a) : (b);
(valueA < valueB) ? (backup_database()) : (nuke_atlantic_ocean());

are valid uses of the operator. Please don't do the latter, though. That's what if is for. There are cases for this sort of thing in e.g. C preprocessor macros, but we're talking about JavaScript here.

args.shift()

Array.prototype.shift. It's the mirror version of pop, ostensibly inherited from shell languages where you can call shift to move onto the next argument. shift "pops" the first argument out of the array and returns it, mutating the array in the process. The inverse is unshift. Full list:

array.shift()
    [1,2,3] -> [2,3], returns 1
array.unshift(new-element)
    [element, ...] -> [new-element, element, ...]
array.pop()
    [1,2,3] -> [1,2], returns 3
array.push(new-element)
    [..., element] -> [..., element, new-element]

See also: slice, splice

.join("")

Array.prototype.join(string). This function turns an array into a string. Example: [1,2,3].join(", ") -> "1, 2, 3"

slide

return setInterval(slideLoop(0, "#container"), 3000);

First off, we return setInterval's return value so that it may be used later in a call to clearInterval. This is important, because JavaScript won't clean that up by itself. I strongly advise against using setTimeout to make a loop. That is not what setTimeout is designed for, and by doing that, you're reverting to GOTO. Read Dijkstra's 1968 paper, Go To Statement Considered Harmful, to understand why GOTO loops are bad practice.

Second off, you'll notice I did some things differently. The repeating interval is the obvious one. This will run forever until the interval is cleared, and at a delay of 3000ms. The value for the callback is the return value of another function, which I have fed the arguments 0 and "#container". This creates a closure, and you will understand how this works shortly.

slideLoop

function slideLoop(margin, selector)

We take margin (0) and selector ("#container") as arguments. The margin is the initial margin value and the selector is the CSS selector used to find the element we're modifying. Pretty straightforward.

const multiplier = -600;
let contStyle = document.querySelector(selector).style;

I've moved some of the hard coded elements up. Since the margins are in multiples of -600, we have a clearly labeled constant multiplier with that base value.

I've also created a reference to the element's style property via the CSS selector. Since style is an object, this is safe to do, as it will be treated as a reference rather than a copy (read up on Pass By Sharing to understand these semantics).

return function(){
    margin = ++margin % 4;
    contStyle.marginLeft = format("%px", margin * multiplier);
}

Now that we have the scope defined, we return a function that uses said scope. This is called a closure. You should read up on those, too. Understanding JavaScript's admittedly bizarre scoping rules will make the language a lot less painful in the long run.

margin = ++margin % 4;
contStyle.marginLeft = format("%px", margin * multiplier);

Here, we simply increment margin and modulus it by 4. The sequence of values this will produce is 1->2->3->0->1->..., which mimics exactly the behavior from the question without any complicated or hard-coded logic.

Afterwards, we use the format function defined earlier to painlessly set the marginLeft CSS property of the container. It's set to the currnent margin value multiplied by the multiplier, which as you recall was set to -600. -600 -> -1200 -> -1800 -> 0 -> -600 -> ...

There are some important differences between my version and Ender's, which I mentioned in a comment on their answer. I'm gonna go over the reasoning now:

Use document.querySelector(css_selector) instead of document.getElementById(id)

querySelector was added in ES6, if I'm not mistaken. querySelector (returns first found element) and querySelectorAll (returns a list of all found elements) are part of the prototype chain of all DOM elements (not just document), and take a CSS selector, so there are other ways to find an element than just by its ID. You can search by ID (#idname), class (.classname), relationships (div.container div div span, p:nth-child(even)), and attributes (div[name], a[href=https://google.com]), among other things.

Always track setInterval(fn, interval)'s return value so it can later be closed with clearInterval(interval_id)

It's not good design to leave an interval running forever. It's also not good design to write a function that calls itself via setTimeout. That is no different from a GOTO loop. The return value of setInterval should be stored and used to clear the interval when it's no longer needed. Think of it as a form of memory management.

Put the interval's callback into its own formal function for readability and maintainability

Constructs like this

setInterval(function(){
    ...
}, 1000);

Can get clunky pretty easily, especially if you are storing the return value of setInterval. I strongly recommend putting the function outside of the call and giving it a name so that it's clear and self-documenting. This also makes it possible to call a function that returns an anonymous function, in case you're doing stuff with closures (a special type of object that contains the local state surrounding a function).

Array.prototype.forEach is fine.

If state is kept with the callback, the callback should be returned from another function (e.g. slideLoop) to form a closure

You don't want to mush state and callbacks together the way Ender did. This is mess-prone and can become hard to maintain. The state should be in the same function that the anonymous function comes from, so as to clearly separate it from the rest of the world. A better name for slideLoop could be makeSlideLoop, just to make it extra clear.

Use proper whitespace. Logical blocks that do different things should be separated by one empty line

This:

print(some_string);

if(foo && bar)
    baz();

while((some_number = some_fn()) !== SOME_SENTINEL && ++counter < limit)
    ;

quux();

is much easier to read than this:

print(some_string);
if(foo&&bar)baz();
while((some_number=some_fn())!==SOME_SENTINEL&&++counter<limit);
quux();

A lot of beginners do this. Including little 14-year-old me from 2009, and I didn't unlearn that bad habit until probably 2013. Stop trying to crush your code down so small.

Avoid "string" + value + "string" + .... Make a format function or use String.prototype.replace(string/regex, new_string)

Again, this is a matter of readability. This:

format("Hello %! You've visited % times today. Your score is %/% (%%).",
    name, visits, score, maxScore, score/maxScore * 100, "%"
);

is much easier to read than this horrific monstrosity:

"Hello " + name + "! You've visited " + visits + "% times today. " + 
"Your score is " + score + "/" + maxScore + " (" + (score/maxScore * 100) +
"%).",

edit: I'm pleased to point out that I made in error in the above snippet, which in my opinion is a great demonstration of how error-prone this method of string building is.

visits + "% times today"
          ^ whoops

It's a good demonstration because the entire reason I made that error, and didn't notice it for as long as I did(n't), is because the code is bloody hard to read.

Always surround the arguments of your ternary expressions with parens. It aids readability and prevents bugs.

I borrow this rule from the best practices surrounding C preprocessor macros. But I don't really need to explain this one; see for yourself:

let myValue = someValue < maxValue ? someValue * 2 : 0;
let myValue = (someValue < maxValue) ? (someValue * 2) : (0);

I don't care how well you think you understand your language's syntax, the latter will ALWAYS be easier to read than the former, and readability is the the only argument that is necessary. You read thousands of times more code than you write. Don't be a jerk to your future self long-term just so you can pat yourself on the back for being clever in the short term.

I use a piece of software called Navicat to :

• Sync Live databases to my test databases.
• Show differences between the two databases.

It costs money, it's windows and mac only, and it's got a whacky UI, but I like it.

SQL Server doesn't allow you to pass parameters to a procedure that you haven't defined. I think the closest you can get to this sort of design is to use optional parameters like so:

CREATE PROCEDURE GetTaskEvents
    @TaskName varchar(50),
    @ID int = NULL
AS
BEGIN
-- SP Logic
END;

You would need to include every possible parameter that you might use in the definition. Then you'd be free to call the procedure either way:

EXEC GetTaskEvents @TaskName = 'TESTTASK', @ID = 2;
EXEC GetTaskEvents @TaskName = 'TESTTASK'; -- @ID gets NULL here

If you're on a mac make sure to edit your /etc/hosts file. Find the IP address per instructions above and add the following line to that file

172.x.xx.x.x outer

After that, the steps above worked: navigate to the right page in my iphone browser, visit http://172.x.xx.x.x:port http://www.imore.com/how-edit-your-macs-hosts-file-and-why-you-would-want

YourListType ListName = (List<YourListType>)Session["SessionName"];

I am just providing another case where you can get this error message. The solution will be the same as Adam has mentioned above. This is from a real code and I renamed the class name.

class FooReader {
  public:
     /** Constructor */
     FooReader() : d(new FooReaderPrivate(this)) { }  // will not compile here
     .......
  private:
     FooReaderPrivate* d;
};

====== In a separate file =====
class FooReaderPrivate {
  public:
     FooReaderPrivate(FooReader*) : parent(p) { }
  private:
     FooReader* parent;
};

The above will no pass the compiler and get error: invalid use of incomplete type FooReaderPrivate. You basically have to put the inline portion into the *.cpp implementation file. This is OK. What I am trying to say here is that you may have a design issue. Cross reference of two classes may be necessary some cases, but I would say it is better to avoid them at the start of the design. I would be wrong, but please comment then I will update my posting.

It seems that you are looking to parse commandline arguments into your bash script. I have searched for this recently myself. I came across the following which I think will assist you in parsing the arguments:

http://rsalveti.wordpress.com/2007/04/03/bash-parsing-arguments-with-getopts/

I added the snippet below as a tl;dr

#using : after a switch variable means it requires some input (ie, t: requires something after t to validate while h requires nothing.
while getopts “ht:r:p:v” OPTION
do
     case $OPTION in
         h)
             usage
             exit 1
             ;;
         t)
             TEST=$OPTARG
             ;;
         r)
             SERVER=$OPTARG
             ;;
         p)
             PASSWD=$OPTARG
             ;;
         v)
             VERBOSE=1
             ;;
         ?)
             usage
             exit
             ;;
     esac
done

if [[ -z $TEST ]] || [[ -z $SERVER ]] || [[ -z $PASSWD ]]
then
     usage
     exit 1
fi

./script.sh -t test -r server -p password -v

You could fill the dependend cell (D2) by a User Defined Function (VBA Macro Function) that takes the value of the C2-Cell as input parameter, returning the current date as ouput.

Having C2 as input parameter for the UDF in D2 tells Excel that it needs to reevaluate D2 everytime C2 changes (that is if auto-calculation of formulas is turned on for the workbook).

EDIT:

Here is some code:

For the UDF:

    Public Function UDF_Date(ByVal data) As Date

        UDF_Date = Now()

    End Function

As Formula in D2:

=UDF_Date(C2)

You will have to give the D2-Cell a Date-Time Format, or it will show a numeric representation of the date-value.

And you can expand the formula over the desired range by draging it if you keep the C2 reference in the D2-formula relative.

Note: This still might not be the ideal solution because every time Excel recalculates the workbook the date in D2 will be reset to the current value. To make D2 only reflect the last time C2 was changed there would have to be some kind of tracking of the past value(s) of C2. This could for example be implemented in the UDF by providing also the address alonside the value of the input parameter, storing the input parameters in a hidden sheet, and comparing them with the previous values everytime the UDF gets called.

Addendum:

Here is a sample implementation of an UDF that tracks the changes of the cell values and returns the date-time when the last changes was detected. When using it, please be aware that:

• The usage of the UDF is the same as described above.

• The UDF works only for single cell input ranges.

• The cell values are tracked by storing the last value of cell and the date-time when the change was detected in the document properties of the workbook. If the formula is used over large datasets the size of the file might increase considerably as for every cell that is tracked by the formula the storage requirements increase (last value of cell + date of last change.) Also, maybe Excel is not capable of handling very large amounts of document properties and the code might brake at a certain point.

• If the name of a worksheet is changed all the tracking information of the therein contained cells is lost.

• The code might brake for cell-values for which conversion to string is non-deterministic.

• The code below is not tested and should be regarded only as proof of concept. Use it at your own risk.

  Public Function UDF_Date(ByVal inData As Range) As Date
  
      Dim wb As Workbook
      Dim dProps As DocumentProperties
      Dim pValue As DocumentProperty
      Dim pDate As DocumentProperty
      Dim sName As String
      Dim sNameDate As String
  
      Dim bDate As Boolean
      Dim bValue As Boolean
      Dim bChanged As Boolean
  
      bDate = True
      bValue = True
  
      bChanged = False
  
  
      Dim sVal As String
      Dim dDate As Date
  
      sName = inData.Address & "_" & inData.Worksheet.Name
      sNameDate = sName & "_dat"
  
      sVal = CStr(inData.Value)
      dDate = Now()
  
      Set wb = inData.Worksheet.Parent
  
      Set dProps = wb.CustomDocumentProperties
  
  On Error Resume Next
  
      Set pValue = dProps.Item(sName)
  
      If Err.Number <> 0 Then
          bValue = False
          Err.Clear
      End If
  
  On Error GoTo 0
  
      If Not bValue Then
          bChanged = True
          Set pValue = dProps.Add(sName, False, msoPropertyTypeString, sVal)
      Else
          bChanged = pValue.Value <> sVal
          If bChanged Then
              pValue.Value = sVal
          End If
      End If
  
  On Error Resume Next
  
      Set pDate = dProps.Item(sNameDate)
  
      If Err.Number <> 0 Then
          bDate = False
          Err.Clear
      End If
  
  On Error GoTo 0
  
      If Not bDate Then
          Set pDate = dProps.Add(sNameDate, False, msoPropertyTypeDate, dDate)
      End If
  
      If bChanged Then
          pDate.Value = dDate
      Else
          dDate = pDate.Value
      End If
  
  
      UDF_Date = dDate
   End Function
  

Make the insertion of the date conditional upon the range.

This has an advantage of not changing the dates unless the content of the cell is changed, and it is in the range C2:C2, even if the sheet is closed and saved, it doesn't recalculate unless the adjacent cell changes.

Adapted from this tip and @Paul S answer

Private Sub Worksheet_Change(ByVal Target As Range)
 Dim R1 As Range
 Dim R2 As Range
 Dim InRange As Boolean
    Set R1 = Range(Target.Address)
    Set R2 = Range("C2:C20")
    Set InterSectRange = Application.Intersect(R1, R2)

  InRange = Not InterSectRange Is Nothing
     Set InterSectRange = Nothing
   If InRange = True Then
     R1.Offset(0, 1).Value = Now()
   End If
     Set R1 = Nothing
     Set R2 = Nothing
 End Sub

size_t is a type that can hold any array index.

Depending on the implementation, it can be any of:

unsigned char

unsigned short

unsigned int

unsigned long

unsigned long long

Here's how size_t is defined in stddef.h of my machine:

typedef unsigned long size_t;

After a lot of trial and error, followed by a stagnant period while I waited for an opportunity to speak with our server guys, I finally had a chance to discuss the problem with them and asked them if they wouldn't mind switching our Sharepoint authentication over to Kerberos.

To my surprise, they said this wouldn't be a problem and was in fact easy to do. They enabled Kerberos and I modified my app.config as follows:

<security mode="Transport">
    <transport clientCredentialType="Windows" />
</security>

For reference, my full serviceModel entry in my app.config looks like this:

<system.serviceModel>
    <bindings>
        <basicHttpBinding>
            <binding name="TestServerReference" closeTimeout="00:01:00" openTimeout="00:01:00"
             receiveTimeout="00:10:00" sendTimeout="00:01:00" allowCookies="false"
             bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard"
             maxBufferSize="2000000" maxBufferPoolSize="2000000" maxReceivedMessageSize="2000000"
             messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered"
             useDefaultWebProxy="true">
                <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
                 maxBytesPerRead="4096" maxNameTableCharCount="16384" />
                <security mode="Transport">
                    <transport clientCredentialType="Windows" />
                </security>
            </binding>
        </basicHttpBinding>
    </bindings>
    <client>
        <endpoint address="https://path/to/site/_vti_bin/Lists.asmx"
         binding="basicHttpBinding" bindingConfiguration="TestServerReference"
         contract="TestServerReference.ListsSoap" name="TestServerReference" />
    </client>
</system.serviceModel>

After this, everything worked like a charm. I can now (finally!) utilize Sharepoint Web Services. So, if anyone else out there can't get their Sharepoint Web Services to work with NTLM, see if you can convince the sysadmins to switch over to Kerberos.

Ok so if an image in a table is clicked you want the data of the first row of the table this image is in.

//image click stuff here {
$(this). // our image
closest('table'). // Go upwards through our parents untill we hit the table
children('tr:first'); // Select the first row we find

var $row = $(this).closest('table').children('tr:first');

parent() will only get the direct parent, closest should do what we want here. From jQuery docs: Get the first ancestor element that matches the selector, beginning at the current element and progressing up through the DOM tree.

function get_json(txt)
{  var data

   try     {  data = eval('('+txt+')'); }
   catch(e){  data = false;             }

   return data;
}

If there are errors, return false.

If there are no errors, return json data

To draw text directly on canvas do the following:

1. Create a member Paint object in myImageView constructor

   Paint mTextPaint = new Paint();
   

2. Use canvas.drawText in your myImageView.onDraw() method:

   canvas.drawText("My fancy text", xpos, ypos, mTextPaint);
   

Explore Paint and Canvas class documentation to add fancy effects.

You can use the JavaScript String concat() Method,

var str1 = "Hello ";
var str2 = "world!";
var res = str1.concat(str2); //will return "Hello world!"

Its syntax is:

string.concat(string1, string2, ..., stringX)

From the use of 8080 I'm assuming you are using a tomcat servlet container to serve your rest api. If this is the case you can also consider to have your webserver proxy the requests to the servlet container.

With apache you would typically use mod_jk (although there are other alternatives) to serve the api trough the web server behind port 80 instead of 8080 which would solve the cross domain issue.

This is common practice, have the 'static' content in the webserver and dynamic content in the container, but both served from behind the same domain.

The url for the rest api would be http://localhost/restws/json/product/get

Here a description on how to use mod_jk to connect apache to tomcat: http://tomcat.apache.org/connectors-doc/webserver_howto/apache.html

Cygwin has issue recognizing space in between the PC name. So to solve this, you have to use "\" after the first word then include the space, then the last name.

such as ".../my\ dir/"

$ cd /cygdrive/c/Users/my\ dir/Documents

Another interesting and simple way to do it, is to put the directory in quotation marks ("")

e.g run it as follows:

$ cd c:
$ cd Users
$ cd "my dir"
$ cd Documents

Hope it works?

You can try replacing this line:

return new DatePickerDialog(this, pDateSetListener, pYear, pMonth, pDay);

By those:

DatePickerDialog dpDialog = new DatePickerDialog(this, pDateSetListener, pYear, pMonth, pDay);
DatePicker datePicker = dpDialog.getDatePicker();

Calendar calendar = Calendar.getInstance();//get the current day
datePicker.setMaxDate(calendar.getTimeInMillis());//set the current day as the max date
return dpDialog;

This recently worked for me. You just need to add to your packages, so that the package manager would be aware of the packages:

1. Add the Sublime Text 2 Repository to your Synaptic Package Manager:

   sudo add-apt-repository ppa:webupd8team/sublime-text-2
   

2. Update

   sudo apt-get update
   

3. Install Sublime Text:

   sudo apt-get install sublime-text
   

check if file exist in side the document/catchimage path :

NSString *stringPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0];
NSString *tempName = [NSString stringWithFormat:@"%@/catchimage/%@.png",stringPath,@"file name"];
NSLog(@"%@",temName);
if([[NSFileManager defaultManager] fileExistsAtPath:temName]){
    // ur code here
} else {
    // ur code here** 
}

In my case, I was going nuts since there wasn't any issues with the string to be decoded, since I could successfully decode it on online tools. Until I found out that you first have to decodeURIComponent what you are decoding, like so:

atob(decodeURIComponent(dataToBeDecoded));

Although I'm answering it very late but it might help someone else. To inject headers to all requests when @NgModule is used, one can do the following:

(I tested this in Angular 2.0.1)

/**
 * Extending BaseRequestOptions to inject common headers to all requests.
 */
class CustomRequestOptions extends BaseRequestOptions {
    constructor() {
        super();
        this.headers.append('Authorization', 'my-token');
        this.headers.append('foo', 'bar');
    }
}

Now in @NgModule do the following:

@NgModule({
    declarations: [FooComponent],
    imports     : [

        // Angular modules
        BrowserModule,
        HttpModule,         // This is required

        /* other modules */
    ],
    providers   : [
        {provide: LocationStrategy, useClass: HashLocationStrategy},
        // This is the main part. We are telling Angular to provide an instance of
        // CustomRequestOptions whenever someone injects RequestOptions
        {provide: RequestOptions, useClass: CustomRequestOptions}
    ],
    bootstrap   : [AppComponent]
})

Given it's SQL 2005, you can also try this It's similar to Oracle's MINUS command (opposite of UNION)

But I would also suggest adding the DATEPART ( hour, insertDate) column for debug

SELECT idCustomer FROM reservations 
EXCEPT
SELECT idCustomer FROM reservations WHERE DATEPART ( hour, insertDate) < 2

Generally, there is a practice in machine learning community not to learn something that you don’t want to. For example, consider a classification problem where one's goal is to assign y labels to a given x input. If we use generative model

p(x,y)=p(y|x).p(x)

we have to model p(x) which is irrelevant for the task in hand. Practical limitations like data sparseness will force us to model p(x) with some weak independence assumptions. Therefore, we intuitively use discriminative models for classification.

You do that as you would in a browser:

    var datetime = new Date();_x000D_
    console.log(datetime);

split with the + sign like this way

String a = tv.getText().toString();
String aa[];
if(a.contains("+"))
    aa = a.split("+");

now convert the array

Integer.parseInt(aa[0]); // and so on

Use org.hibernate.annotations for doing Cascade , if the hibernate and JPA are used together , its somehow complaining on saving the child objects.

You can just multiply 1.0

>>> 1.0*144/314
0.4585987261146497

Some useful extensions:

extension String {
    func substring(from: Int, to: Int) -> String {
        let start = index(startIndex, offsetBy: from)
        let end = index(start, offsetBy: to - from)
        return String(self[start ..< end])
    }

    func substring(range: NSRange) -> String {
        return substring(from: range.lowerBound, to: range.upperBound)
    }
}

The abstract methods are implicitly virtual. Abstract methods require an instance, but static methods do not have an instance. So, you can have a static method in an abstract class, it just cannot be static abstract (or abstract static).

org.json.JSONObject now has a keySet() method which returns a Set<String> and can easily be looped through with a for-each.

for(String key : jsonObject.keySet())

It's true, there are also more complete option, like changing the name of the app for a sentence you want. Check this tutorial it can help:

http://www.firstdroid.com/2010/08/04/adding-progress-bar-on-webview-android-tutorials/

In that tutorial you have a complete example how to use the progressbar in a webview app.

Adrian.

Where are you jar files? Is there a pattern to find where they are?

1. Are they all in one directory?

For example, foo/a/a.jar and foo/b/b.jar are all under the folder foo/, in this case, you could use find with grep:

find foo/ -name "*.jar" | xargs grep Hello.class

Sure, at least you can search them under the root directory /, but it will be slow.

As @loganaayahee said, you could also use the command locate. locate search the files with an index, so it will be faster. But the command should be:

locate "*.jar" | xargs grep Hello.class

Since you want to search the content of the jar files.

2. Are the paths stored in an environment variable?

Typically, Java will store the paths to find jar files in an environment variable like CLASS_PATH, I don't know if this is what you want. But if your variable is just like this:CLASS_PATH=/lib:/usr/lib:/bin, which use a : to separate the paths, then you could use this commend to search the class:

for P in `echo $CLASS_PATH | sed 's/:/ /g'`; do grep Hello.calss $P/*.jar; done

Part 1 - Joins and Unions

This answer covers:

1. Part 1
   • Joining two or more tables using an inner join (See the wikipedia entry for additional info)
   • How to use a union query
   • Left and Right Outer Joins (this stackOverflow answer is excellent to describe types of joins)
   • Intersect queries (and how to reproduce them if your database doesn't support them) - this is a function of SQL-Server (see info) and part of the reason I wrote this whole thing in the first place.
2. Part 2
   • Subqueries - what they are, where they can be used and what to watch out for
   • Cartesian joins AKA - Oh, the misery!

There are a number of ways to retrieve data from multiple tables in a database. In this answer, I will be using ANSI-92 join syntax. This may be different to a number of other tutorials out there which use the older ANSI-89 syntax (and if you are used to 89, may seem much less intuitive - but all I can say is to try it) as it is much easier to understand when the queries start getting more complex. Why use it? Is there a performance gain? The short answer is no, but it is easier to read once you get used to it. It is easier to read queries written by other folks using this syntax.

I am also going to use the concept of a small caryard which has a database to keep track of what cars it has available. The owner has hired you as his IT Computer guy and expects you to be able to drop him the data that he asks for at the drop of a hat.

I have made a number of lookup tables that will be used by the final table. This will give us a reasonable model to work from. To start off, I will be running my queries against an example database that has the following structure. I will try to think of common mistakes that are made when starting out and explain what goes wrong with them - as well as of course showing how to correct them.

The first table is simply a color listing so that we know what colors we have in the car yard.

mysql> create table colors(id int(3) not null auto_increment primary key, 
    -> color varchar(15), paint varchar(10));
Query OK, 0 rows affected (0.01 sec)

mysql> show columns from colors;
+-------+-------------+------+-----+---------+----------------+
| Field | Type        | Null | Key | Default | Extra          |
+-------+-------------+------+-----+---------+----------------+
| id    | int(3)      | NO   | PRI | NULL    | auto_increment |
| color | varchar(15) | YES  |     | NULL    |                |
| paint | varchar(10) | YES  |     | NULL    |                |
+-------+-------------+------+-----+---------+----------------+
3 rows in set (0.01 sec)

mysql> insert into colors (color, paint) values ('Red', 'Metallic'), 
    -> ('Green', 'Gloss'), ('Blue', 'Metallic'), 
    -> ('White' 'Gloss'), ('Black' 'Gloss');
Query OK, 5 rows affected (0.00 sec)
Records: 5  Duplicates: 0  Warnings: 0

mysql> select * from colors;
+----+-------+----------+
| id | color | paint    |
+----+-------+----------+
|  1 | Red   | Metallic |
|  2 | Green | Gloss    |
|  3 | Blue  | Metallic |
|  4 | White | Gloss    |
|  5 | Black | Gloss    |
+----+-------+----------+
5 rows in set (0.00 sec)

The brands table identifies the different brands of the cars out caryard could possibly sell.

mysql> create table brands (id int(3) not null auto_increment primary key, 
    -> brand varchar(15));
Query OK, 0 rows affected (0.01 sec)

mysql> show columns from brands;
+-------+-------------+------+-----+---------+----------------+
| Field | Type        | Null | Key | Default | Extra          |
+-------+-------------+------+-----+---------+----------------+
| id    | int(3)      | NO   | PRI | NULL    | auto_increment |
| brand | varchar(15) | YES  |     | NULL    |                |
+-------+-------------+------+-----+---------+----------------+
2 rows in set (0.01 sec)

mysql> insert into brands (brand) values ('Ford'), ('Toyota'), 
    -> ('Nissan'), ('Smart'), ('BMW');
Query OK, 5 rows affected (0.00 sec)
Records: 5  Duplicates: 0  Warnings: 0

mysql> select * from brands;
+----+--------+
| id | brand  |
+----+--------+
|  1 | Ford   |
|  2 | Toyota |
|  3 | Nissan |
|  4 | Smart  |
|  5 | BMW    |
+----+--------+
5 rows in set (0.00 sec)

The model table will cover off different types of cars, it is going to be simpler for this to use different car types rather than actual car models.

mysql> create table models (id int(3) not null auto_increment primary key, 
    -> model varchar(15));
Query OK, 0 rows affected (0.01 sec)

mysql> show columns from models;
+-------+-------------+------+-----+---------+----------------+
| Field | Type        | Null | Key | Default | Extra          |
+-------+-------------+------+-----+---------+----------------+
| id    | int(3)      | NO   | PRI | NULL    | auto_increment |
| model | varchar(15) | YES  |     | NULL    |                |
+-------+-------------+------+-----+---------+----------------+
2 rows in set (0.00 sec)

mysql> insert into models (model) values ('Sports'), ('Sedan'), ('4WD'), ('Luxury');
Query OK, 4 rows affected (0.00 sec)
Records: 4  Duplicates: 0  Warnings: 0

mysql> select * from models;
+----+--------+
| id | model  |
+----+--------+
|  1 | Sports |
|  2 | Sedan  |
|  3 | 4WD    |
|  4 | Luxury |
+----+--------+
4 rows in set (0.00 sec)

And finally, to tie up all these other tables, the table that ties everything together. The ID field is actually the unique lot number used to identify cars.

mysql> create table cars (id int(3) not null auto_increment primary key, 
    -> color int(3), brand int(3), model int(3));
Query OK, 0 rows affected (0.01 sec)

mysql> show columns from cars;
+-------+--------+------+-----+---------+----------------+
| Field | Type   | Null | Key | Default | Extra          |
+-------+--------+------+-----+---------+----------------+
| id    | int(3) | NO   | PRI | NULL    | auto_increment |
| color | int(3) | YES  |     | NULL    |                |
| brand | int(3) | YES  |     | NULL    |                |
| model | int(3) | YES  |     | NULL    |                |
+-------+--------+------+-----+---------+----------------+
4 rows in set (0.00 sec)

mysql> insert into cars (color, brand, model) values (1,2,1), (3,1,2), (5,3,1), 
    -> (4,4,2), (2,2,3), (3,5,4), (4,1,3), (2,2,1), (5,2,3), (4,5,1);
Query OK, 10 rows affected (0.00 sec)
Records: 10  Duplicates: 0  Warnings: 0

mysql> select * from cars;
+----+-------+-------+-------+
| id | color | brand | model |
+----+-------+-------+-------+
|  1 |     1 |     2 |     1 |
|  2 |     3 |     1 |     2 |
|  3 |     5 |     3 |     1 |
|  4 |     4 |     4 |     2 |
|  5 |     2 |     2 |     3 |
|  6 |     3 |     5 |     4 |
|  7 |     4 |     1 |     3 |
|  8 |     2 |     2 |     1 |
|  9 |     5 |     2 |     3 |
| 10 |     4 |     5 |     1 |
+----+-------+-------+-------+
10 rows in set (0.00 sec)

This will give us enough data (I hope) to cover off the examples below of different types of joins and also give enough data to make them worthwhile.

So getting into the grit of it, the boss wants to know The IDs of all the sports cars he has.

This is a simple two table join. We have a table that identifies the model and the table with the available stock in it. As you can see, the data in the model column of the cars table relates to the models column of the cars table we have. Now, we know that the models table has an ID of 1 for Sports so lets write the join.

select
    ID,
    model
from
    cars
        join models
            on model=ID

So this query looks good right? We have identified the two tables and contain the information we need and use a join that correctly identifies what columns to join on.

ERROR 1052 (23000): Column 'ID' in field list is ambiguous

Oh noes! An error in our first query! Yes, and it is a plum. You see, the query has indeed got the right columns, but some of them exist in both tables, so the database gets confused about what actual column we mean and where. There are two solutions to solve this. The first is nice and simple, we can use tableName.columnName to tell the database exactly what we mean, like this:

select
    cars.ID,
    models.model
from
    cars
        join models
            on cars.model=models.ID

+----+--------+
| ID | model  |
+----+--------+
|  1 | Sports |
|  3 | Sports |
|  8 | Sports |
| 10 | Sports |
|  2 | Sedan  |
|  4 | Sedan  |
|  5 | 4WD    |
|  7 | 4WD    |
|  9 | 4WD    |
|  6 | Luxury |
+----+--------+
10 rows in set (0.00 sec)

The other is probably more often used and is called table aliasing. The tables in this example have nice and short simple names, but typing out something like KPI_DAILY_SALES_BY_DEPARTMENT would probably get old quickly, so a simple way is to nickname the table like this:

select
    a.ID,
    b.model
from
    cars a
        join models b
            on a.model=b.ID

Now, back to the request. As you can see we have the information we need, but we also have information that wasn't asked for, so we need to include a where clause in the statement to only get the Sports cars as was asked. As I prefer the table alias method rather than using the table names over and over, I will stick to it from this point onwards.

Clearly, we need to add a where clause to our query. We can identify Sports cars either by ID=1 or model='Sports'. As the ID is indexed and the primary key (and it happens to be less typing), lets use that in our query.

select
    a.ID,
    b.model
from
    cars a
        join models b
            on a.model=b.ID
where
    b.ID=1

+----+--------+
| ID | model  |
+----+--------+
|  1 | Sports |
|  3 | Sports |
|  8 | Sports |
| 10 | Sports |
+----+--------+
4 rows in set (0.00 sec)

Bingo! The boss is happy. Of course, being a boss and never being happy with what he asked for, he looks at the information, then says I want the colors as well.

Okay, so we have a good part of our query already written, but we need to use a third table which is colors. Now, our main information table cars stores the car color ID and this links back to the colors ID column. So, in a similar manner to the original, we can join a third table:

select
    a.ID,
    b.model
from
    cars a
        join models b
            on a.model=b.ID
        join colors c
            on a.color=c.ID
where
    b.ID=1

+----+--------+
| ID | model  |
+----+--------+
|  1 | Sports |
|  3 | Sports |
|  8 | Sports |
| 10 | Sports |
+----+--------+
4 rows in set (0.00 sec)

Damn, although the table was correctly joined and the related columns were linked, we forgot to pull in the actual information from the new table that we just linked.

select
    a.ID,
    b.model,
    c.color
from
    cars a
        join models b
            on a.model=b.ID
        join colors c
            on a.color=c.ID
where
    b.ID=1

+----+--------+-------+
| ID | model  | color |
+----+--------+-------+
|  1 | Sports | Red   |
|  8 | Sports | Green |
| 10 | Sports | White |
|  3 | Sports | Black |
+----+--------+-------+
4 rows in set (0.00 sec)

Right, that's the boss off our back for a moment. Now, to explain some of this in a little more detail. As you can see, the from clause in our statement links our main table (I often use a table that contains information rather than a lookup or dimension table. The query would work just as well with the tables all switched around, but make less sense when we come back to this query to read it in a few months time, so it is often best to try to write a query that will be nice and easy to understand - lay it out intuitively, use nice indenting so that everything is as clear as it can be. If you go on to teach others, try to instill these characteristics in their queries - especially if you will be troubleshooting them.

It is entirely possible to keep linking more and more tables in this manner.

select
    a.ID,
    b.model,
    c.color
from
    cars a
        join models b
            on a.model=b.ID
        join colors c
            on a.color=c.ID
        join brands d
            on a.brand=d.ID
where
    b.ID=1

While I forgot to include a table where we might want to join more than one column in the join statement, here is an example. If the models table had brand-specific models and therefore also had a column called brand which linked back to the brands table on the ID field, it could be done as this:

select
    a.ID,
    b.model,
    c.color
from
    cars a
        join models b
            on a.model=b.ID
        join colors c
            on a.color=c.ID
        join brands d
            on a.brand=d.ID
            and b.brand=d.ID
where
    b.ID=1

You can see, the query above not only links the joined tables to the main cars table, but also specifies joins between the already joined tables. If this wasn't done, the result is called a cartesian join - which is dba speak for bad. A cartesian join is one where rows are returned because the information doesn't tell the database how to limit the results, so the query returns all the rows that fit the criteria.

So, to give an example of a cartesian join, lets run the following query:

select
    a.ID,
    b.model
from
    cars a
        join models b

+----+--------+
| ID | model  |
+----+--------+
|  1 | Sports |
|  1 | Sedan  |
|  1 | 4WD    |
|  1 | Luxury |
|  2 | Sports |
|  2 | Sedan  |
|  2 | 4WD    |
|  2 | Luxury |
|  3 | Sports |
|  3 | Sedan  |
|  3 | 4WD    |
|  3 | Luxury |
|  4 | Sports |
|  4 | Sedan  |
|  4 | 4WD    |
|  4 | Luxury |
|  5 | Sports |
|  5 | Sedan  |
|  5 | 4WD    |
|  5 | Luxury |
|  6 | Sports |
|  6 | Sedan  |
|  6 | 4WD    |
|  6 | Luxury |
|  7 | Sports |
|  7 | Sedan  |
|  7 | 4WD    |
|  7 | Luxury |
|  8 | Sports |
|  8 | Sedan  |
|  8 | 4WD    |
|  8 | Luxury |
|  9 | Sports |
|  9 | Sedan  |
|  9 | 4WD    |
|  9 | Luxury |
| 10 | Sports |
| 10 | Sedan  |
| 10 | 4WD    |
| 10 | Luxury |
+----+--------+
40 rows in set (0.00 sec)

Good god, that's ugly. However, as far as the database is concerned, it is exactly what was asked for. In the query, we asked for for the ID from cars and the model from models. However, because we didn't specify how to join the tables, the database has matched every row from the first table with every row from the second table.

Okay, so the boss is back, and he wants more information again. I want the same list, but also include 4WDs in it.

This however, gives us a great excuse to look at two different ways to accomplish this. We could add another condition to the where clause like this:

select
    a.ID,
    b.model,
    c.color
from
    cars a
        join models b
            on a.model=b.ID
        join colors c
            on a.color=c.ID
        join brands d
            on a.brand=d.ID
where
    b.ID=1
    or b.ID=3

While the above will work perfectly well, lets look at it differently, this is a great excuse to show how a union query will work.

We know that the following will return all the Sports cars:

select
    a.ID,
    b.model,
    c.color
from
    cars a
        join models b
            on a.model=b.ID
        join colors c
            on a.color=c.ID
        join brands d
            on a.brand=d.ID
where
    b.ID=1

And the following would return all the 4WDs:

select
    a.ID,
    b.model,
    c.color
from
    cars a
        join models b
            on a.model=b.ID
        join colors c
            on a.color=c.ID
        join brands d
            on a.brand=d.ID
where
    b.ID=3

So by adding a union all clause between them, the results of the second query will be appended to the results of the first query.

select
    a.ID,
    b.model,
    c.color
from
    cars a
        join models b
            on a.model=b.ID
        join colors c
            on a.color=c.ID
        join brands d
            on a.brand=d.ID
where
    b.ID=1
union all
select
    a.ID,
    b.model,
    c.color
from
    cars a
        join models b
            on a.model=b.ID
        join colors c
            on a.color=c.ID
        join brands d
            on a.brand=d.ID
where
    b.ID=3

+----+--------+-------+
| ID | model  | color |
+----+--------+-------+
|  1 | Sports | Red   |
|  8 | Sports | Green |
| 10 | Sports | White |
|  3 | Sports | Black |
|  5 | 4WD    | Green |
|  7 | 4WD    | White |
|  9 | 4WD    | Black |
+----+--------+-------+
7 rows in set (0.00 sec)

As you can see, the results of the first query are returned first, followed by the results of the second query.

In this example, it would of course have been much easier to simply use the first query, but union queries can be great for specific cases. They are a great way to return specific results from tables from tables that aren't easily joined together - or for that matter completely unrelated tables. There are a few rules to follow however.

• The column types from the first query must match the column types from every other query below.
• The names of the columns from the first query will be used to identify the entire set of results.
• The number of columns in each query must be the same.

Now, you might be wondering what the difference is between using union and union all. A union query will remove duplicates, while a union all will not. This does mean that there is a small performance hit when using union over union all but the results may be worth it - I won't speculate on that sort of thing in this though.

On this note, it might be worth noting some additional notes here.

• If we wanted to order the results, we can use an order by but you can't use the alias anymore. In the query above, appending an order by a.ID would result in an error - as far as the results are concerned, the column is called ID rather than a.ID - even though the same alias has been used in both queries.
• We can only have one order by statement, and it must be as the last statement.

For the next examples, I am adding a few extra rows to our tables.

I have added Holden to the brands table. I have also added a row into cars that has the color value of 12 - which has no reference in the colors table.

Okay, the boss is back again, barking requests out - *I want a count of each brand we carry and the number of cars in it!` - Typical, we just get to an interesting section of our discussion and the boss wants more work.

Rightyo, so the first thing we need to do is get a complete listing of possible brands.

select
    a.brand
from
    brands a

+--------+
| brand  |
+--------+
| Ford   |
| Toyota |
| Nissan |
| Smart  |
| BMW    |
| Holden |
+--------+
6 rows in set (0.00 sec)

Now, when we join this to our cars table we get the following result:

select
    a.brand
from
    brands a
        join cars b
            on a.ID=b.brand
group by
    a.brand

+--------+
| brand  |
+--------+
| BMW    |
| Ford   |
| Nissan |
| Smart  |
| Toyota |
+--------+
5 rows in set (0.00 sec)

Which is of course a problem - we aren't seeing any mention of the lovely Holden brand I added.

This is because a join looks for matching rows in both tables. As there is no data in cars that is of type Holden it isn't returned. This is where we can use an outer join. This will return all the results from one table whether they are matched in the other table or not:

select
    a.brand
from
    brands a
        left outer join cars b
            on a.ID=b.brand
group by
    a.brand

+--------+
| brand  |
+--------+
| BMW    |
| Ford   |
| Holden |
| Nissan |
| Smart  |
| Toyota |
+--------+
6 rows in set (0.00 sec)

Now that we have that, we can add a lovely aggregate function to get a count and get the boss off our backs for a moment.

select
    a.brand,
    count(b.id) as countOfBrand
from
    brands a
        left outer join cars b
            on a.ID=b.brand
group by
    a.brand

+--------+--------------+
| brand  | countOfBrand |
+--------+--------------+
| BMW    |            2 |
| Ford   |            2 |
| Holden |            0 |
| Nissan |            1 |
| Smart  |            1 |
| Toyota |            5 |
+--------+--------------+
6 rows in set (0.00 sec)

And with that, away the boss skulks.

Now, to explain this in some more detail, outer joins can be of the left or right type. The Left or Right defines which table is fully included. A left outer join will include all the rows from the table on the left, while (you guessed it) a right outer join brings all the results from the table on the right into the results.

Some databases will allow a full outer join which will bring back results (whether matched or not) from both tables, but this isn't supported in all databases.

Now, I probably figure at this point in time, you are wondering whether or not you can merge join types in a query - and the answer is yes, you absolutely can.

select
    b.brand,
    c.color,
    count(a.id) as countOfBrand
from
    cars a
        right outer join brands b
            on b.ID=a.brand
        join colors c
            on a.color=c.ID
group by
    a.brand,
    c.color

+--------+-------+--------------+
| brand  | color | countOfBrand |
+--------+-------+--------------+
| Ford   | Blue  |            1 |
| Ford   | White |            1 |
| Toyota | Black |            1 |
| Toyota | Green |            2 |
| Toyota | Red   |            1 |
| Nissan | Black |            1 |
| Smart  | White |            1 |
| BMW    | Blue  |            1 |
| BMW    | White |            1 |
+--------+-------+--------------+
9 rows in set (0.00 sec)

So, why is that not the results that were expected? It is because although we have selected the outer join from cars to brands, it wasn't specified in the join to colors - so that particular join will only bring back results that match in both tables.

Here is the query that would work to get the results that we expected:

select
    a.brand,
    c.color,
    count(b.id) as countOfBrand
from
    brands a
        left outer join cars b
            on a.ID=b.brand
        left outer join colors c
            on b.color=c.ID
group by
    a.brand,
    c.color

+--------+-------+--------------+
| brand  | color | countOfBrand |
+--------+-------+--------------+
| BMW    | Blue  |            1 |
| BMW    | White |            1 |
| Ford   | Blue  |            1 |
| Ford   | White |            1 |
| Holden | NULL  |            0 |
| Nissan | Black |            1 |
| Smart  | White |            1 |
| Toyota | NULL  |            1 |
| Toyota | Black |            1 |
| Toyota | Green |            2 |
| Toyota | Red   |            1 |
+--------+-------+--------------+
11 rows in set (0.00 sec)

As we can see, we have two outer joins in the query and the results are coming through as expected.

Now, how about those other types of joins you ask? What about Intersections?

Well, not all databases support the intersection but pretty much all databases will allow you to create an intersection through a join (or a well structured where statement at the least).

An Intersection is a type of join somewhat similar to a union as described above - but the difference is that it only returns rows of data that are identical (and I do mean identical) between the various individual queries joined by the union. Only rows that are identical in every regard will be returned.

A simple example would be as such:

select
    *
from
    colors
where
    ID>2
intersect
select
    *
from
    colors
where
    id<4

While a normal union query would return all the rows of the table (the first query returning anything over ID>2 and the second anything having ID<4) which would result in a full set, an intersect query would only return the row matching id=3 as it meets both criteria.

Now, if your database doesn't support an intersect query, the above can be easily accomlished with the following query:

select
    a.ID,
    a.color,
    a.paint
from
    colors a
        join colors b
            on a.ID=b.ID
where
    a.ID>2
    and b.ID<4

+----+-------+----------+
| ID | color | paint    |
+----+-------+----------+
|  3 | Blue  | Metallic |
+----+-------+----------+
1 row in set (0.00 sec)

If you wish to perform an intersection across two different tables using a database that doesn't inherently support an intersection query, you will need to create a join on every column of the tables.

As others have said, %% will escape the %.

Note, however, that you should never do this:

char c[100];
char *c2;
...
printf(c); /* OR */
printf(c2);

Whenever you have to print a string, always, always, always print it using

printf("%s", c)

to prevent an embedded % from causing problems [memory violations, segfault, etc]

def attributeSelection():
balance = 25
print("Your SP balance is currently 25.")
strength = input("How much SP do you want to put into strength?")
balanceAfterStrength = balance - int(strength)
if balanceAfterStrength == 0:
    print("Your SP balance is now 0.")
    attributeConfirmation()
elif strength < 0:
    print("That is an invalid input. Restarting attribute selection. Keep an eye on your balance this time!")
    attributeSelection()
elif strength > balance:
    print("That is an invalid input. Restarting attribute selection. Keep an eye on your balance this time!")
    attributeSelection()
elif balanceAfterStrength > 0 and balanceAfterStrength < 26:
    print("Ok. You're balance is now at " + str(balanceAfterStrength) + " skill points.")
else:
    print("That is an invalid input. Restarting attribute selection.")
    attributeSelection()

Improving on João's and satru's code, I suggest creating a cursor mixin that can be used to build a cursor with an execute that accepts nested iterables and handles them correctly. A better name would be nice, though... For Python3, use str instead of basestring.

from MySQLdb.cursors import Cursor

class BetterExecuteMixin(object):
    """
    This mixin class provides an implementation of the execute method
    that properly handles sequence arguments for use with IN tests.
    Examples:
    execute('SELECT * FROM foo WHERE id IN (%s) AND type=%s', ([1,2,3], 'bar'))
    # Notice that when the sequence is the only argument, you still need
    # a surrounding tuple:
    execute('SELECT * FROM foo WHERE id IN (%s)', ([1,2,3],))
    """

    def execute(self, query, args=None):
        if args is not None:
            try:
                iter(args)
            except TypeError:
                args = (args,)
            else:
                if isinstance(args, basestring):
                    args = (args,)
            real_params = []
            placeholders = []
            for arg in args:
                # sequences that we treat as a single argument
                if isinstance(arg, basestring):
                    real_params.append(arg)
                    placeholders.append('%s')
                    continue
                try:
                    real_params.extend(arg)
                    placeholders.append(','.join(['%s']*len(arg)))
                except TypeError:
                    real_params.append(arg)
                    placeholders.append('%s')
            args = real_params
            query = query % tuple(placeholders)
        return super(BetterExecuteMixin, self).execute(query, args)

class BetterCursor(BetterExecuteMixin, Cursor):
    pass

This can then be used as follows (and it's still backwards compatible!):

import MySQLdb
conn = MySQLdb.connect(user='user', passwd='pass', db='dbname', host='host',
                       cursorclass=BetterCursor)
cursor = conn.cursor()
cursor.execute('SELECT * FROM foo WHERE id IN (%s) AND type=%s', ([1,2,3], 'bar'))
cursor.execute('SELECT * FROM foo WHERE id IN (%s)', ([1,2,3],))
cursor.execute('SELECT * FROM foo WHERE type IN (%s)', (['bar', 'moo'],))
cursor.execute('SELECT * FROM foo WHERE type=%s', 'bar')
cursor.execute('SELECT * FROM foo WHERE type=%s', ('bar',))

I think, testing variables for values you do not expect is not a good idea in general. Because the test as your you can consider as writing a blacklist of forbidden values. But what if you forget to list all the forbidden values? Someone, even you, can crack your code with passing an unexpected value. So a more appropriate approach is something like whitelisting - testing variables only for the expected values, not unexpected. For example, if you expect the data value to be a string, instead of this:

function (data) {
  if (data != null && data !== undefined) {
    // some code here
    // but what if data === false?
    // or data === '' - empty string?
  }
}

do something like this:

function (data) {
  if (typeof data === 'string' && data.length) {
    // consume string here, it is here for sure
    // cleaner, it is obvious what type you expect
    // safer, less error prone due to implicit coercion
  } 
}

There are a lot of great answers here - but I found my issue was quite a bit more simple.

I was trying to run the following command:

$x['name']   = $j['name'];

and I was getting this illegal string error on $x['name'] because I hadn't defined the array first. So I put the following line of code in before trying to assign things to $x[]:

$x = array();

and it worked.

clear pictureBox in c# winform Application Simple way to clear pictureBox in c# winform Application

I use

\pagenumbering{roman}

for everything in the frontmatter and then switch over to

\pagenumbering{arabic}

for the actual content. With pdftex, the page numbers come out right in the PDF file.

Depends on your needs there is an addition to accepted answer. You may also implement it like this:

var parseCompletion: (() ->Void)!

and later in some func assign to it

func someHavyFunc(completion: @escaping () -> Void){
    self.parseCompletion = completion
}

and in some second function use it

func someSecondFunc(){
    if let completion = self.parseCompletion {
        completion()
    }
}

note that @escaping parameter is a mandatory here

Spring 5 / Spring Boot 2 examples:

blocking

@GetMapping({"/dto-blocking/{type}", "/dto-blocking"})
public ResponseEntity<Dto> getDtoBlocking(
        @PathVariable(name = "type", required = false) String type) {
    if (StringUtils.isEmpty(type)) {
        type = "default";
    }
    return ResponseEntity.ok().body(dtoBlockingRepo.findByType(type));
}

reactive

@GetMapping({"/dto-reactive/{type}", "/dto-reactive"})
public Mono<ResponseEntity<Dto>> getDtoReactive(
        @PathVariable(name = "type", required = false) String type) {
    if (StringUtils.isEmpty(type)) {
        type = "default";
    }
    return dtoReactiveRepo.findByType(type).map(dto -> ResponseEntity.ok().body(dto));
}

You can use another driver

<dependency>
    <groupId>net.sourceforge.jtds</groupId>
    <artifactId>jtds</artifactId>
    <version>1.3.1</version>
</dependency>

and in xml

<bean id="idNameDb" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="net.sourceforge.jtds.jdbc.Driver" />
        <property name="url" value="jdbc:jtds:sqlserver://[ip]:1433;DatabaseName=[name]" />
        <property name="username" value="user" />
        <property name="password" value="password" />
</bean>

document.getElementById("link").getAttribute("href"); If you have more than one <a> tag, for example:

<ul>_x000D_
  <li>_x000D_
    <a href="1"></a>_x000D_
  </li>_x000D_
  <li>_x000D_
    <a href="2"></a>_x000D_
  </li>_x000D_
  <li>_x000D_
    <a href="3"></a>_x000D_
  </li>_x000D_
</ul>

You can do it like this: document.getElementById("link")[0].getAttribute("href"); to access the first array of <a> tags, or depends on the condition you make.

In addition to the solution you accepted, you could also implement the special __lt__() ("less than") method on the class. The sort() method (and the sorted() function) will then be able to compare the objects, and thereby sort them. This works best when you will only ever sort them on this attribute, however.

class Foo(object):

     def __init__(self, score):
         self.score = score

     def __lt__(self, other):
         return self.score < other.score

l = [Foo(3), Foo(1), Foo(2)]
l.sort()

Define it in your init file and call by M-x reload-user-init-file

(defun reload-user-init-file()
  (interactive)
  (load-file user-init-file))

You can accomplish this two ways, both of which need to be done through editing your template files.

The first one is just to add an html link to your navigation where ever you want it to show up.

The second (and my guess, the one you're looking for) is to create a new page template, which isn't too difficult if you have the ability to create a new .php file in your theme/template directory. Something like the below code should do:

<?php /*  
Template Name: Page Redirect
*/ 

header('Location: http://www.nameofnewsite.com');
exit();

?>

Where the template name is whatever you want to set it too and the url in the header function is the new url you want to direct a user to. After you modify the above code to meet your needs, save it in a php file in your active theme folder to the template name. So, if you leave the name of your template "Page Redirect" name the php file page-redirect.php.

After that's been saved, log into your WordPress backend, and create a new page. You can add a title and content to the body if you'd like, but the important thing to note is that on the right hand side, there should be a drop down option for you to choose which page template to use, with default showing first. In that drop down list, there should be the name of the new template file to use. Select the new template, publish the page, and you should be golden.

Also, you can do this dynamically as well by using the Custom Fields section below the body editor. If you're interested, let me know and I can paste the code for that guy in a new response.

I made a little helper for Entity Framework 6 (.Net Core style), to include sub-entities in a nice way.

It is on NuGet now : Install-Package ThenInclude.EF6

using System.Data.Entity;

var thenInclude = context.One.Include(x => x.Twoes)
    .ThenInclude(x=> x.Threes)
    .ThenInclude(x=> x.Fours)
    .ThenInclude(x=> x.Fives)
    .ThenInclude(x => x.Sixes)
    .Include(x=> x.Other)
    .ToList();

The package is available on GitHub.

rm in within can be quite useful.

within(mtcars, rm(mpg, cyl, disp, hp))
#                     drat    wt  qsec vs am gear carb
# Mazda RX4           3.90 2.620 16.46  0  1    4    4
# Mazda RX4 Wag       3.90 2.875 17.02  0  1    4    4
# Datsun 710          3.85 2.320 18.61  1  1    4    1
# Hornet 4 Drive      3.08 3.215 19.44  1  0    3    1
# Hornet Sportabout   3.15 3.440 17.02  0  0    3    2
# Valiant             2.76 3.460 20.22  1  0    3    1
# ...

May be combined with other operations.

within(mtcars, {
  mpg2=mpg^2
  cyl2=cyl^2
  rm(mpg, cyl, disp, hp)
  })
#                     drat    wt  qsec vs am gear carb cyl2    mpg2
# Mazda RX4           3.90 2.620 16.46  0  1    4    4   36  441.00
# Mazda RX4 Wag       3.90 2.875 17.02  0  1    4    4   36  441.00
# Datsun 710          3.85 2.320 18.61  1  1    4    1   16  519.84
# Hornet 4 Drive      3.08 3.215 19.44  1  0    3    1   36  457.96
# Hornet Sportabout   3.15 3.440 17.02  0  0    3    2   64  349.69
# Valiant             2.76 3.460 20.22  1  0    3    1   36  327.61
# ...

Using java 8 this can be done with

`int[][] destination=Arrays.stream(source)
                    .map(a ->  Arrays.copyOf(a, a.length))
                    .toArray(int[][]::new);

I had a batch of files that looked like this: be90-01.png and needed to change the dash to underscore. I used this, which worked well:

for f in *; do mv "$f" "`echo $f | tr '-' '_'`"; done

Tuples cannot efficiently be appended like a list.

So a tuple comprehension would need to use a list internally and then convert to a tuple.

That would be the same as what you do now : tuple( [ comprehension ] )

Here's another way of getting a Bash array with the example JSON given by @anubhava in his answer:

arr=($(jq --raw-output 'keys_unsorted | @sh' file.json))

echo ${arr[0]}    # 'Archiver-Version'
echo ${arr[1]}    # 'Build-Id'
echo ${arr[2]}    # 'Build-Jdk'

As the others have said, it's for type conversion, in this case to a bool. For example:

class A {
    bool isItSafe;

public:
    operator bool() const
    {
        return isItSafe;
    }

    ...
};

Now I can use an object of this class as if it's a boolean:

A a;
...
if (a) {
    ....
}

Yet another answer with a few extra features like support for quoted values that contain escaped quotes and CR/LF characters (single values that span multiple lines).

NOTE: Though the solution below can likely be adapted for other regex engines, using it as-is will require that your regex engine treats multiple named capture groups using the same name as one single capture group. (.NET does this by default)

When multiple lines/records of a CSV file/stream (matching RFC standard 4180) are passed to the regular expression below it will return a match for each non-empty line/record. Each match will contain a capture group named Value that contains the captured values in that line/record (and potentially an OpenValue capture group if there was an open quote at the end of the line/record).

Here's the commented pattern (test it on Regexstorm.net):

(?<=\r|\n|^)(?!\r|\n|$)                       // Records start at the beginning of line (line must not be empty)
(?:                                           // Group for each value and a following comma or end of line (EOL) - required for quantifier (+?)
  (?:                                         // Group for matching one of the value formats before a comma or EOL
    "(?<Value>(?:[^"]|"")*)"|                 // Quoted value -or-
    (?<Value>(?!")[^,\r\n]+)|                 // Unquoted value -or-
    "(?<OpenValue>(?:[^"]|"")*)(?=\r|\n|$)|   // Open ended quoted value -or-
    (?<Value>)                                // Empty value before comma (before EOL is excluded by "+?" quantifier later)
  )
  (?:,|(?=\r|\n|$))                           // The value format matched must be followed by a comma or EOL
)+?                                           // Quantifier to match one or more values (non-greedy/as few as possible to prevent infinite empty values)
(?:(?<=,)(?<Value>))?                         // If the group of values above ended in a comma then add an empty value to the group of matched values
(?:\r\n|\r|\n|$)                              // Records end at EOL

Here's the raw pattern without all the comments or whitespace.

(?<=\r|\n|^)(?!\r|\n|$)(?:(?:"(?<Value>(?:[^"]|"")*)"|(?<Value>(?!")[^,\r\n]+)|"(?<OpenValue>(?:[^"]|"")*)(?=\r|\n|$)|(?<Value>))(?:,|(?=\r|\n|$)))+?(?:(?<=,)(?<Value>))?(?:\r\n|\r|\n|$)

Here is a visualization from Debuggex.com (capture groups named for clarity):

Examples on how to use the regex pattern can be found on my answer to a similar question here, or on C# pad here, or here.

The only portable way to achieve consistency between rooms and tags and making sure rooms are never returned after they had been deleted is locking them with SELECT FOR UPDATE.

However in some systems locking is a side effect of concurrency control, and you achieve the same results without specifying FOR UPDATE explicitly.

To solve this problem, Thread 1 should SELECT id FROM rooms FOR UPDATE, thereby preventing Thread 2 from deleting from rooms until Thread 1 is done. Is that correct?

This depends on the concurrency control your database system is using.

• MyISAM in MySQL (and several other old systems) does lock the whole table for the duration of a query.

• In SQL Server, SELECT queries place shared locks on the records / pages / tables they have examined, while DML queries place update locks (which later get promoted to exclusive or demoted to shared locks). Exclusive locks are incompatible with shared locks, so either SELECT or DELETE query will lock until another session commits.

• In databases which use MVCC (like Oracle, PostgreSQL, MySQL with InnoDB), a DML query creates a copy of the record (in one or another way) and generally readers do not block writers and vice versa. For these databases, a SELECT FOR UPDATE would come handy: it would lock either SELECT or the DELETE query until another session commits, just as SQL Server does.

When should one use REPEATABLE_READ transaction isolation versus READ_COMMITTED with SELECT ... FOR UPDATE?

Generally, REPEATABLE READ does not forbid phantom rows (rows that appeared or disappeared in another transaction, rather than being modified)

• In Oracle and earlier PostgreSQL versions, REPEATABLE READ is actually a synonym for SERIALIZABLE. Basically, this means that the transaction does not see changes made after it has started. So in this setup, the last Thread 1 query will return the room as if it has never been deleted (which may or may not be what you wanted). If you don't want to show the rooms after they have been deleted, you should lock the rows with SELECT FOR UPDATE

• In InnoDB, REPEATABLE READ and SERIALIZABLE are different things: readers in SERIALIZABLE mode set next-key locks on the records they evaluate, effectively preventing the concurrent DML on them. So you don't need a SELECT FOR UPDATE in serializable mode, but do need them in REPEATABLE READ or READ COMMITED.

Note that the standard on isolation modes does prescribe that you don't see certain quirks in your queries but does not define how (with locking or with MVCC or otherwise).

When I say "you don't need SELECT FOR UPDATE" I really should have added "because of side effects of certain database engine implementation".

If you set CURLOPT_RETURNTRANSFER to true or 1 then the return value from curl_exec will be the actual result from the successful operation. In other words it will not return TRUE on success. Although it will return FALSE on failure.

As described in the Return Values section of curl-exec PHP manual page: http://php.net/manual/function.curl-exec.php

You should enable the CURLOPT_FOLLOWLOCATION option for redirects but this would be a problem if your server is in safe_mode and/or open_basedir is in effect which can cause issues with curl as well.

To check for a timeout, I believe you check the value of ex.Number. If it is -2, then you have a timeout situation.

-2 is the error code for timeout, returned from DBNETLIB, the MDAC driver for SQL Server. This can be seen by downloading Reflector, and looking under System.Data.SqlClient.TdsEnums for TIMEOUT_EXPIRED.

Your code would read:

if (ex.Number == -2)
{
     //handle timeout
}

Code to demonstrate failure:

try
{
    SqlConnection sql = new SqlConnection(@"Network Library=DBMSSOCN;Data Source=YourServer,1433;Initial Catalog=YourDB;Integrated Security=SSPI;");
    sql.Open();

    SqlCommand cmd = sql.CreateCommand();
    cmd.CommandText = "DECLARE @i int WHILE EXISTS (SELECT 1 from sysobjects) BEGIN SELECT @i = 1 END";
    cmd.ExecuteNonQuery(); // This line will timeout.

    cmd.Dispose();
    sql.Close();
}
catch (SqlException ex)
{
    if (ex.Number == -2) {
        Console.WriteLine ("Timeout occurred");
    }
}

|| is the logical OR operator. It sounds like you basically know what that is. It's used in conditional statements such as if, while, etc.

condition1 || condition2

Evaluates to true if either condition1 OR condition2 is true.

| is the bitwise OR operator. It's used to operate on two numbers. You look at each bit of each number individually and, if one of the bits is 1 in at least one of the numbers, then the resulting bit will be 1 also. Here are a few examples:

A = 01010101
B = 10101010
A | B = 11111111

A = 00000001
B = 00010000
A | B = 00010001

A = 10001011
B = 00101100

A | B = 10101111

Hopefully that makes sense.

So to answer the last two questions, I wouldn't say there are any caveats besides "know the difference between the two operators." They're not interchangeable because they do two completely different things.

I solved this problem by using @ResponseBody like below:

@RequestMapping(value = "/resturl", method = RequestMethod.GET, produces = {"application/json"})
    @ResponseStatus(HttpStatus.OK)
    @Transactional(value = "jpaTransactionManager")
    public @ResponseBody List<DomainObject> findByResourceID(@PathParam("resourceID") String resourceID) {

The main difference is that the output of pip freeze can be dumped into a requirements.txt file and used later to re-construct the "frozen" environment.

In other words you can run: pip freeze > frozen-requirements.txt on one machine and then later on a different machine or on a clean environment you can do: pip install -r frozen-requirements.txt and you'll get the an identical environment with the exact same dependencies installed as you had in the original environment where you generated the frozen-requirements.txt.

To ignore all untracked files in any submodule use the following command to ignore those changes.

git config --global diff.ignoreSubmodules dirty

It will add the following configuration option to your local git config:

[diff]
  ignoreSubmodules = dirty

Further information can be found here

jQuery Version

JavaScript (modified from a script I found on someone's site - I just can't find the site again, so I can't give the person credit):

$(document).ready(function() {
  $("#bookmarkme").click(function() {
    if (window.sidebar) { // Mozilla Firefox Bookmark
      window.sidebar.addPanel(location.href,document.title,"");
    } else if(window.external) { // IE Favorite
      window.external.AddFavorite(location.href,document.title); }
    else if(window.opera && window.print) { // Opera Hotlist
      this.title=document.title;
      return true;
    }
  });
});

HTML:

<a id="bookmarkme" href="#" rel="sidebar" title="bookmark this page">Bookmark This Page</a>

IE will show an error if you don't run it off a server (it doesn't allow JavaScript bookmarks via JavaScript when viewing it as a file://...).

use awk

awk 'FNR==NR && /configs.*projectname\.conf/{f=1;next}f==0;END{ if(!f) { print "your line"}} ' file file

Use a no-break space directly   (not the same as !).

(You could insert HTML or some esoteric markdown code, but I can think of better reasons to break compatibility with standard markdown.)

You can pass the value to the function using this.value, where this points to the button

<input type="button" value="mybutton1" onclick="dosomething(this.value)">

And then access that value in the function

function dosomething(val){
  console.log(val);
}

From the C++0x draft Standard.

$5.3.5/2 - "[...]In either alternative, the value of the operand of delete may be a null pointer value.[...'"

Of course, no one would ever do 'delete' of a pointer with NULL value, but it is safe to do. Ideally one should not have code that does deletion of a NULL pointer. But it is sometimes useful when deletion of pointers (e.g. in a container) happens in a loop. Since delete of a NULL pointer value is safe, one can really write the deletion logic without explicit checks for NULL operand to delete.

As an aside, C Standard $7.20.3.2 also says that 'free' on a NULL pointer does no action.

The free function causes the space pointed to by ptr to be deallocated, that is, made available for further allocation. If ptr is a null pointer, no action occurs.

To obtain the id of the documents in a collection, you must use snapshotChanges()

    this.shirtCollection = afs.collection<Shirt>('shirts');
    // .snapshotChanges() returns a DocumentChangeAction[], which contains
    // a lot of information about "what happened" with each change. If you want to
    // get the data and the id use the map operator.
    this.shirts = this.shirtCollection.snapshotChanges().map(actions => {
      return actions.map(a => {
        const data = a.payload.doc.data() as Shirt;
        const id = a.payload.doc.id;
        return { id, ...data };
      });
    });

Documentation https://github.com/angular/angularfire2/blob/7eb3e51022c7381dfc94ffb9e12555065f060639/docs/firestore/collections.md#example

First we should know the order of execution of Clauses i.e FROM > WHERE > GROUP BY > HAVING > DISTINCT > SELECT > ORDER BY. Since WHERE Clause gets executed before GROUP BY Clause the records cannot be filtered by applying WHERE to a GROUP BY applied records.

"HAVING is same as the WHERE clause but is applied on grouped records".

first the WHERE clause fetches the records based on the condition then the GROUP BY clause groups them accordingly and then the HAVING clause fetches the group records based on the having condition.

the best way: $('#myTextBox').val('new value').trim();

If you want to remove all the data from all your tables, you might want to try the command python manage.py flush. This will delete all of the data in your tables, but the tables themselves will still exist.

See more here: https://docs.djangoproject.com/en/1.8/ref/django-admin/

Just to update all, after some deliberations, I have decided to use Async Http Client instead to solve my earlier problem. The library allows a cleaner approach (to me) to manipulate HTTP responses especially in cases where JSON objects are returned in all scenarios/HTTP statuses.

protected void getLogin() {

    EditText username = (EditText) findViewById(R.id.username); 
    EditText password = (EditText) findViewById(R.id.password); 

    RequestParams params = new RequestParams();
    params.put("username", username.getText().toString());
    params.put("password", password.getText().toString());

    RestClient.post(getHost() + "api/v1/auth/login", params,
            new JsonHttpResponseHandler() {

        @Override
        public void onSuccess(int statusCode, Header[] headers,
                JSONObject response) {

            try {

                //process JSONObject obj 
                Log.w("myapp","success status code..." + statusCode);

            } catch (JSONException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }

        @Override
        public void onFailure(int statusCode, Header[] headers,
                Throwable throwable, JSONObject errorResponse) {
            Log.w("myapp", "failure status code..." + statusCode);


            try {
                //process JSONObject obj
                Log.w("myapp", "error ..."  + errorResponse.getString("message").toString());
            } catch (JSONException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    });
}

static int b[][]={{21,21},{22,22}};

static int a[][] ={{1,1},{2,2}};

public static void mul(){
    int c[][] = new int[2][2];

    for(int i=0;i<b.length;i++){
        for(int j=0;j<b.length;j++){
            c[i][j] =0;
        }   
    }

    for(int i=0;i<a.length;i++){
        for(int j=0;j<b.length;j++){
            for(int k=0;k<b.length;k++){
            c[i][j]= c[i][j] +(a[i][k] * b[k][j]);
            }
        }
    }

    for(int i=0;i<c.length;i++){
        for(int j=0;j<c.length;j++){
            System.out.print(c[i][j]);
        }   
        System.out.println("\n");
    }
}

Missing prerequisites. IBM has the solution below:

yum install gtk2.i686
yum install libXtst.i686

If you received the the missing libstdc++ message above, 
install the libstdc++ library: 
yum install compat-libstdc++

https://www-304.ibm.com/support/docview.wss?uid=swg21459143

You can use SRV records:

_service._proto.name. TTL class SRV priority weight port target.

Service: the symbolic name of the desired service.

Proto: the transport protocol of the desired service; this is usually either TCP or UDP.

Name: the domain name for which this record is valid, ending in a dot.

TTL: standard DNS time to live field.

Class: standard DNS class field (this is always IN).

Priority: the priority of the target host, lower value means more preferred.

Weight: A relative weight for records with the same priority.

Port: the TCP or UDP port on which the service is to be found.

Target: the canonical hostname of the machine providing the service, ending in a dot.

Example:

_sip._tcp.example.com. 86400 IN SRV 0 5 5060 sipserver.example.com.

So what I think you're looking for is to add something like this to your DNS hosts file:

_sip._tcp.arboristal.com. 86400 IN SRV 10 40 25565 mc.arboristal.com.
_sip._tcp.arboristal.com. 86400 IN SRV 10 30 25566 tekkit.arboristal.com.
_sip._tcp.arboristal.com. 86400 IN SRV 10 30 25567 pvp.arboristal.com.

On a side note, I highly recommend you go with a hosting company rather than hosting the servers yourself. It's just asking for trouble with your home connection (DDoS and Bandwidth/Connection Speed), but it's up to you.

I see a few things wrong.

1. You reuse the identifier char, so that will cause issues.
2. You're saying if char == word[count] instead of word[some index]
3. You return after the first iteration of the for loop!

You don't even need the while. If you rename the char param to search,

for char in word:
    if char == search:
        count += 1
return count

Verified remedy from earlier postings:

1) Checked that the libhadoop.so.1.0.0 shipped with the Hadoop distribution was compiled for my machine architecture, which is x86_64:

[nova]:file /opt/hadoop-2.6.0/lib/native/libhadoop.so.1.0.0
/opt/hadoop-2.6.0/lib/native/libhadoop.so.1.0.0: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, BuildID[sha1]=3a80422c78d708c9a1666c1a8edd23676ed77dbb, not stripped

2) Added -Djava.library.path=<path> to HADOOP_OPT in hadoop-env.sh:

export HADOOP_OPTS="$HADOOP_OPTS -Djava.net.preferIPv4Stack=true -Djava.library.path=/opt/hadoop-2.6.0/lib/native"

This indeed made the annoying warning disappear.

In Angular4 as you deal with @types system, you should do following things,

Do,

1) npm install --save @types/jquery
2) npm install --save @types/bootstrap

tsconfig.json

look for types array and add jquery and bootstrap entries,

"types": [
      "jquery",
      "bootstrap",  
      "node"
]

Index.html

in head section add following entries,

  <link href="node_modules/bootstrap/dist/css/bootstrap.min.css" rel="stylesheet">
  <script src="node_modules/jquery/dist/jquery.min.js "></script>
  <script src="node_modules/bootstrap/dist/js/bootstrap.js "></script>

And start using jquery and bootstrap both.

For Xamarin Developers, please use : SupportActionBar.Elevation = 0; for AppCompatActivity or ActionBar.Elevation = 0; for non-compat Activities

Appart from setting maven source url to your gradle, I would suggest to add both design and appcompat libraries. Currently the latest version is 26.1.0

maven {
    url "https://maven.google.com"
}

...

compile 'com.android.support:appcompat-v7:26.1.0'
compile 'com.android.support:design:26.1.0'

Save this file as .bat and run it , change variables inside parenthesis ...

@echo off
title Mysql Import Script
cd (Folder Name)
 for %%a in (*) do (
     echo Importing File  : %%a 
     mysql -u(username) -p(password)  %%~na < %%a
)
pause

if it's only one database modify (%%~na) with the database name .

if you want to change only the colour of the flag on hover use this:

http://jsfiddle.net/uvamhedx/

.fa-flag:hover {_x000D_
    color: red;_x000D_
}

<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet"/>_x000D_
_x000D_
<i class="fa fa-flag fa-3x"></i>

WordPress overrides PHP's memory limit to 256M, with the assumption that whatever it was set to before is going to be too low to render the dashboard. You can override this by defining WP_MAX_MEMORY_LIMIT in wp-config.php:

define( 'WP_MAX_MEMORY_LIMIT' , '512M' );

I agree with DanFromGermany, 256M is really a lot of memory for rendering a dashboard page. Changing the memory limit is really putting a bandage on the problem.

I've got the same error. I have been trying to fixing this by setting higher permission to account running SQL Client service, however it didnt help. The problem was that I run MS Sql Management studio just within my account. So, next time... assure that you are running it as Run as Administrator, if using Win7 with UAC enabled.

CREATE OR REPLACE FUNCTION HASTANE.getXXXXX(p_rowid in rowid) return VARCHAR2
  as
          l_data long;
  begin
         select XXXXXX into l_data from XXXXX where rowid = p_rowid;
         return substr( l_data, 1, 4000);
  end getlabrapor1;

Try this (LINQ method syntax):

string[] columnNames = dt.Columns.Cast<DataColumn>()
                                 .Select(x => x.ColumnName)
                                 .ToArray();  

or in LINQ Query syntax:

string[] columnNames = (from dc in dt.Columns.Cast<DataColumn>()
                        select dc.ColumnName).ToArray();

Cast is required, because Columns is of type DataColumnCollection which is a IEnumerable, not IEnumerable<DataColumn>. The other parts should be obvious.

I needed to see the results of this script and was able to do so by incorporating the below:

var i=0;

function increase()
{
i++;
document.getElementById('boldstuff').innerHTML= +i;
}

<p>var = <b id="boldstuff">0</b></p>
<input type="button" onclick="increase();">

add the "script" tag above all and a closing script tag below the function end curly brace. Returning false caused firefox to hang when I tried it. All other solutions didn't show the result of the increment, in my experience.

class AttrDict(dict):

     def __init__(self):
           self.__dict__ = self

if __name__ == '____main__':

     d = AttrDict()
     d['ray'] = 'hope'
     d.sun = 'shine'  >>> Now we can use this . notation
     print d['ray']
     print d.sun

for alternative you can use as below:

if (variable >= 5 && variable <= 100) {
        doSomething();

    }

or the following code also works

switch (variable)
{
    case 5:
    case 6:
    etc.
    case 100:
        doSomething();
    break;
}

import codecs

decode_hex = codecs.getdecoder("hex_codec")

# for an array
msgs = [decode_hex(msg)[0] for msg in msgs]

# for a string
string = decode_hex(string)[0]

You need httpclient.jar and httpcore.jar. You can download them from here.

http://archive.apache.org/dist/httpcomponents/httpclient/binary/

In Rails 5 you can use ActiveRecord::Type::Boolean.new.cast(value) to cast it to a boolean.

If you are converting string to float:

import re
A1 = [' "29.0" ',' "65.2" ',' "75.2" ']
float_values = [float(re.search(r'\d+.\d+',number).group()) for number in A1]
print(float_values)
>>> [29.0, 65.2, 75.2]

To exclude system databases:

SELECT [name]
FROM master.dbo.sysdatabases
WHERE dbid > 6

Edited : 2:36 PM 2/5/2013

Updated with accurate database_id, It should be greater than 4, to skip listing system databases which are having database id between 1 and 4.

SELECT * 
FROM sys.databases d
WHERE d.database_id > 4

(Get-Date (Get-Date -Format d)).AddHours(-2)

select * from tablename order by ID DESC

that will give you row with id 22

For those starting with an existing IDEA installation (IDEA 15 in my case) to which they're adding the Android SDK (and not starting formally speaking with Android Studio), ...

Download (just) the SDK to your filesystem (somewhere convenient to you; it doesn't matter where).

When creating your first project and you get to the Project SDK: bit (or adding the Android SDK ahead of time as you wish), navigate (New) to the root of what you exploded into the filesystem as suggested by some of the other answers here.

At that point you'll get a tiny dialog to confirm with:

Java SDK:     1.7            (e.g.)
Build target: Android 6.0    (e.g.)

You can click OK whereupon you'll see what you did as an option in the Project SDK: drop-down, e.g.:

Android API 23 Platform (java version "1.7.0_67")

As previously mentioned, the bundler version may be too high for your version of rails.

I ran into the same problem using Rails 3.0.1 which requires Bundler v1.0.0 - v1.0.22

Check your bundler version using: gem list bundler

If your bundler version is not within the appropriate range, I found this solution to work: rvm @global do gem uninstall bundler

Note: rvm is required for this solution... another case for why you should be using rvm in the first place.

I'd like to add that inline functions are crucial when you are building shared library. Without marking function inline, it will be exported into the library in the binary form. It will be also present in the symbols table, if exported. On the other side, inlined functions are not exported, neither to the library binaries nor to the symbols table.

It may be critical when library is intended to be loaded at runtime. It may also hit binary-compatible-aware libraries. In such cases don't use inline.

chsh -s $(which zsh)

You'll be prompted for your password, but once you update your settings any new iTerm/Terminal sessions you start on that machine will default to zsh.

DSO here means Dynamic Shared Object; since the error message says it's missing from the command line, I guess you have to add it to the command line.

That is, try adding -lpthread to your command line.

Your client should hire someone that knows what they are doing, who can make the right decisions and can mentor you.

Talk above about you having some ability to change the transaction processing system on the backend is absurd - you shouldn't be allowed to make such architectural changes, so don't expect to be able to.

My rationale on this:

Since your domain is payment processing, its safe to assume that PCI DSS and/or PA DSS (and potential state/federal law) will be significant to your business - to be compliant you must show you are secure. To be insecure then find out (via testing) that you aren't secure, then fixing, retesting, etcetera until security can be verified at a suitable level = expensive, slow, high-risk way to success. To do the right thing, think hard up front, commit experienced talent to the job, develop in a secure manner, then test, fix (less), etcetera (less) until security can be verified at a suitable level = inexpensive, fast, low-risk way to success.

Your first problem was you weren't using your compare symbols correctly.

< less than
> greater than
<= less than or equal to
>= greater than or equal to

To answer your other questions; get the condition to work on every cell in the column and what about blanks?

What about blanks?

Add an extra IF condition to check if the cell is blank or not, if it isn't blank perform the check. =IF(B2="","",B2<=TODAY())

Condition on every cell in column

I played around with this and found out that trimToSize() seems to work. I am working on the Android platform so it might be different.

Try running /Applications/Utilities/Keychain Access.

Both functions use the os.path.split(path) function to split the pathname path into a pair; (head, tail).

The os.path.dirname(path) function returns the head of the path.

E.g.: The dirname of '/foo/bar/item' is '/foo/bar'.

The os.path.basename(path) function returns the tail of the path.

E.g.: The basename of '/foo/bar/item' returns 'item'

From: http://docs.python.org/2/library/os.path.html#os.path.basename

Interestingly none of the answers mentioned that And and Or in VB.NET are bit operators whereas OrElse and AndAlso are strictly Boolean operators.

Dim a = 3 OR 5 ' Will set a to the value 7, 011 or 101 = 111
Dim a = 3 And 5 ' Will set a to the value 1, 011 and 101 = 001
Dim b = 3 OrElse 5 ' Will set b to the value true and not evaluate the 5
Dim b = 3 AndAlso 5 ' Will set b to the value true after evaluating the 5
Dim c = 0 AndAlso 5 ' Will set c to the value false and not evaluate the 5

Note: a non zero integer is considered true; Dim e = not 0 will set e to -1 demonstrating Not is also a bit operator.

|| and && (the C# versions of OrElse and AndAlso) return the last evaluated expression which would be 3 and 5 respectively. This lets you use the idiom v || 5 in C# to give 5 as the value of the expression when v is null or (0 and an integer) and the value of v otherwise. The difference in semantics can catch a C# programmer dabbling in VB.NET off guard as this "default value idiom" doesn't work in VB.NET.

So, to answer the question: Use Or and And for bit operations (integer or Boolean). Use OrElse and AndAlso to "short circuit" an operation to save time, or test the validity of an evaluation prior to evaluating it. If valid(evaluation) andalso evaluation then or if not (unsafe(evaluation) orelse (not evaluation)) then

Bonus: What is the value of the following?

Dim e = Not 0 And 3

In normally html5 video player will support mp4, WebM, 3gp and OGV format directly.

    <video controls>
      <source src=http://techslides.com/demos/sample-videos/small.webm type=video/webm>
      <source src=http://techslides.com/demos/sample-videos/small.ogv type=video/ogg>
      <source src=http://techslides.com/demos/sample-videos/small.mp4 type=video/mp4>
      <source src=http://techslides.com/demos/sample-videos/small.3gp type=video/3gp>
    </video>

We can add an external HLS js script in web application.

    <!DOCTYPE html>
    <html>
    <head>
    <meta charset=utf-8 />
    <title>Your title</title>
      
    
      <link href="https://unpkg.com/video.js/dist/video-js.css" rel="stylesheet">
      <script src="https://unpkg.com/video.js/dist/video.js"></script>
      <script src="https://unpkg.com/videojs-contrib-hls/dist/videojs-contrib-hls.js"></script>
       
    </head>
    <body>
      <video id="my_video_1" class="video-js vjs-fluid vjs-default-skin" controls preload="auto"
      data-setup='{}'>
        <source src="https://cdn3.wowza.com/1/ejBGVnFIOW9yNlZv/cithRSsv/hls/live/playlist.m3u8" type="application/x-mpegURL">
      </video>
      
    <script>
    var player = videojs('my_video_1');
    player.play();
    </script>
      
    </body>
    </html>

If this function is in a module/class, you could just write them outside of the function, so it has Global Scope. Global Scope means the variable can be accessed by another function in the same module/class (if you use dim as declaration statement, use public if you want the variables can be accessed by all function in all modules) :

Dim iRaw As Integer
Dim iColumn As Integer

Function find_results_idle()
    iRaw = 1
    iColumn = 1
End Function

Function this_can_access_global()
    iRaw = 2
    iColumn = 2
End Function

You should get the awaiter (GetAwaiter()) and end the wait for the completion of the asynchronous task (GetResult()).

string code = GenerateCodeAsync().GetAwaiter().GetResult();

A combination of line styles, markers, and qualitative colors from matplotlib:

import itertools
import matplotlib as mpl
import matplotlib.pyplot as plt
N = 8*4+10
l_styles = ['-','--','-.',':']
m_styles = ['','.','o','^','*']
colormap = mpl.cm.Dark2.colors   # Qualitative colormap
for i,(marker,linestyle,color) in zip(range(N),itertools.product(m_styles,l_styles, colormap)):
    plt.plot([0,1,2],[0,2*i,2*i], color=color, linestyle=linestyle,marker=marker,label=i)
plt.legend(bbox_to_anchor=(1.05, 1), loc=2, borderaxespad=0.,ncol=4);

UPDATE: Supporting not only ListedColormap, but also LinearSegmentedColormap

import itertools
import matplotlib.pyplot as plt
Ncolors = 8
#colormap = plt.cm.Dark2# ListedColormap
colormap = plt.cm.viridis# LinearSegmentedColormap
Ncolors = min(colormap.N,Ncolors)
mapcolors = [colormap(int(x*colormap.N/Ncolors)) for x in range(Ncolors)]
N = Ncolors*4+10
l_styles = ['-','--','-.',':']
m_styles = ['','.','o','^','*']
fig,ax = plt.subplots(gridspec_kw=dict(right=0.6))
for i,(marker,linestyle,color) in zip(range(N),itertools.product(m_styles,l_styles, mapcolors)):
    ax.plot([0,1,2],[0,2*i,2*i], color=color, linestyle=linestyle,marker=marker,label=i)
ax.legend(bbox_to_anchor=(1.05, 1), loc=2, borderaxespad=0.,ncol=3,prop={'size': 8})

The primary key in Cassandra usually consists of two parts - Partition key and Clustering columns.

primary_key((partition_key), clustering_col )

Partition key - The first part of the primary key. The main aim of a partition key is to identify the node which stores the particular row.

CREATE TABLE phone_book ( phone_num int, name text, age int, city text, PRIMARY KEY ((phone_num, name), age);

Here, (phone_num, name) is the partition key. While inserting the data, the hash value of the partition key is generated and this value decides which node the row should go into.

Consider a 4 node cluster, each node has a range of hash values it can store. (Write) INSERT INTO phone_book VALUES (7826573732, ‘Joey’, 25, ‘New York’);

Now, the hash value of the partition key is calculated by Cassandra partitioner. say, hash value(7826573732, ‘Joey’) ? 12 , now, this row will be inserted in Node C.

(Read) SELECT * FROM phone_book WHERE phone_num=7826573732 and name=’Joey’;

Now, again the hash value of the partition key (7826573732,’Joey’) is calculated, which is 12 in our case which resides in Node C, from which the read is done.

2. Clustering columns - Second part of the primary key. The main purpose of having clustering columns is to store the data in a sorted order. By default, the order is ascending.

There can be more than one partition key and clustering columns in a primary key depending on the query you are solving.

primary_key((pk1, pk2), col 1,col2)

monthly_mean.plot(y='A')

Uses index as x-axis by default.

The meaning of CascadeType.ALL is that the persistence will propagate (cascade) all EntityManager operations (PERSIST, REMOVE, REFRESH, MERGE, DETACH) to the relating entities.

It seems in your case to be a bad idea, as removing an Address would lead to removing the related User. As a user can have multiple addresses, the other addresses would become orphans. However the inverse case (annotating the User) would make sense - if an address belongs to a single user only, it is safe to propagate the removal of all addresses belonging to a user if this user is deleted.

BTW: you may want to add a mappedBy="addressOwner" attribute to your User to signal to the persistence provider that the join column should be in the ADDRESS table.

To set the class when clicking on a div immediately within the .container element, you could use:

<script>
$('.container>div').click(function () {
        $(this).addClass('whatever')
    });
</script>

Greetings if i get you right you need a JavaScript function that doing it

function report(v) {
//To Do
  switch(v) {
    case "daily":
      //Do something
      break;
    case "monthly":
      //Do somthing
      break;
    }
  }

Regards

Something like this?

div {_x000D_
  border: 1px solid #202020;_x000D_
  margin-top: 25px;_x000D_
  margin-left: 25px;_x000D_
  width: 158px;_x000D_
  height: 158px;_x000D_
  padding-top: 25px;_x000D_
  -webkit-box-shadow: 0px -4px 3px rgba(50, 50, 50, 0.75);_x000D_
  -moz-box-shadow: 0px -4px 3px rgba(50, 50, 50, 0.75);_x000D_
  box-shadow: 0px -4px 3px rgba(50, 50, 50, 0.75);_x000D_
}

<div></div>

I would suggest

sapply(foo, typeof)

if you need the actual types of the vectors in the data frame. class() is somewhat of a different beast.

If you don't need to get this information as a vector (i.e. you don't need it to do something else programmatically later), just use str(foo).

In both cases foo would be replaced with the name of your data frame.

Download http://www.dll-found.com/download/e/EntityFramework.dll

Paste it in (for x86)

C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0\

Then Right click on project -> add reference -> select EntityFramework

Bingo......

You need to install the APK on the emulator. You can do this with the adb command line tool that is included in the Android SDK.

adb -e install -r yourapp.apk

Once you've done that you should be able to run the app.

The -e and -r flags might not be necessary. They just specify that you are using an emulator (if you also have a device connected) and that you want to replace the app if it already exists.

My answer is inspired on my own working experience, and mostly in the book Two Scoops of Django which I highly recommend, and where you can find a more detailed explanation of everything. I just will answer some of the points, and any improvement or correction will be welcomed. But there also can be more correct manners to achieve the same purpose.

Projects
I have a main folder in my personal directory where I maintain all the projects where I am working on.

Source Files
I personally use the django project root as repository root of my projects. But in the book is recommended to separate both things. I think that this is a better approach, so I hope to start making the change progressively on my projects.

project_repository_folder/
    .gitignore
    Makefile
    LICENSE.rst
    docs/
    README.rst
    requirements.txt
    project_folder/
        manage.py
        media/
        app-1/
        app-2/
        ...
        app-n/
        static/
        templates/
        project/
            __init__.py
            settings/
                __init__.py
                base.py
                dev.py
                local.py
                test.py
                production.py
            ulrs.py
            wsgi.py

Repository
Git or Mercurial seem to be the most popular version control systems among Django developers. And the most popular hosting services for backups GitHub and Bitbucket.

Virtual Environment
I use virtualenv and virtualenvwrapper. After installing the second one, you need to set up your working directory. Mine is on my /home/envs directory, as it is recommended on virtualenvwrapper installation guide. But I don't think the most important thing is where is it placed. The most important thing when working with virtual environments is keeping requirements.txt file up to date.

pip freeze -l > requirements.txt 

Static Root
Project folder

Media Root
Project folder

README
Repository root

LICENSE
Repository root

Documents
Repository root. This python packages can help you making easier mantaining your documentation:

• reStructuredText
• Sphinx

Sketches

Examples

Database

Data validation drop down

There is a list option in Data validation. If this is combined with a VLOOKUP formula you would be able to convert the selected value into a number.

The steps in Excel 2010 are:

• Create your list with matching values.
• On the Data tab choose Data Validation
• The Data validation form will be displayed
• Set the Allow dropdown to List
• Set the Source range to the first part of your list
• Click on OK (User messages can be added if required)

In a cell enter a formula like this

=VLOOKUP(A2,$D$3:$E$5,2,FALSE)

which will return the matching value from the second part of your list.

Form control drop down

Alternatively, Form controls can be placed on a worksheet. They can be linked to a range and return the position number of the selected value to a specific cell.

The steps in Excel 2010 are:

• Create your list of data in a worksheet
• Click on the Developer tab and dropdown on the Insert option
• In the Form section choose Combo box or List box
• Use the mouse to draw the box on the worksheet
• Right click on the box and select Format control
• The Format control form will be displayed
• Click on the Control tab
• Set the Input range to your list of data
• Set the Cell link range to the cell where you want the number of the selected item to appear
• Click on OK

For others unexpectedly getting the Window element, a common pitfall:

<a href="javascript:myfunction(this)">click here</a>

which actually scopes this to the Window object. Instead:

<a href="javascript:nop()" onclick="myfunction(this)">click here</a>

passes the a object as expected. (nop() is just any empty function.)

If you're using Selenium 2.0 / Webdriver you can call driver.getTitle() or driver.getPageSource() if you want to search through the actual page source.

Everything is correct above, but one of facts simple explanation LAZY----There are cases when you want to delay the creation of an instance of your object until its first usage. This technique is known as lazy initialization or lazy instantiation. The main purpose of lazy initialization is to boost performance and reduce your memory footprint. If instantiating an instance of your type carries a large computational cost and the program might end up not actually using it, you would want to delay or even avoid wasting CPU cycles.

You didn't mention if you are using Excel 2003 or 2007, but you may run into an issue with the # of rows in Excel 2003 being capped at 65,536. If you are using 2007, the limit is 1,048,576.

Also, can I ask what your end goal is for your analysis? If you need to perform many statistical calculations on your data, I would recommend moving out of the Excel environment into something that is more directly suited for data manipulation and analysis, such as R.

There are a variety of options for connecting R to Excel, including

1. RExcel
2. RODBC
3. Other options in the R manual

Regardless of what you choose to use to move data in/out of R, the code to change from wide to long format is pretty trivial. I enjoy the melt() function from the reshape package. That code would look like:

library(reshape)
#Fake data, 4 columns, 20k rows
df <- data.frame(foo = rnorm(20000)
    , bar = rlnorm(20000)
    , fee = rnorm(20000)
    , fie = rlnorm(20000)
)
#Create new object with 1 column, 80k rows
df.m <- melt(df)

From there, you can perform any number of statistical or graphing operations. If you use the RExcel plugin above, you can fire all of this up and run it within Excel itself. The R community is very active and can help address any and all questions you may encounter.

Good luck!

If you include a font file (otf, ttf, etc.) in your package, you can use the font in your application via the method described here:

Oracle Java SE 6: java.awt.Font

There is a tutorial available from Oracle that shows this example:

try {
     GraphicsEnvironment ge = 
         GraphicsEnvironment.getLocalGraphicsEnvironment();
     ge.registerFont(Font.createFont(Font.TRUETYPE_FONT, new File("A.ttf")));
} catch (IOException|FontFormatException e) {
     //Handle exception
}

I would probably wrap this up in some sort of resource loader though as to not reload the file from the package every time you want to use it.

An answer more closely related to your original question would be to install the font as part of your application's installation process. That process will depend on the installation method you choose. If it's not a desktop app you'll have to look into the links provided.

To enable background printing in Chrome:

body {
  -webkit-print-color-adjust: exact !important;
}