Came here looking for help as got same error running a statement listed below while going through a Udemy course:

INSERT INTO departments (department_id, department_name)
                  values( &dpet_id, '&dname');  

I'd been able to run statements with substitution variables before. Comment by Charles Burns about possibility of server reaching some threshold while recreating the variables prompted me to log out and restart the SQL Developer. The statement ran fine after logging back in.

Thought I'd share for anyone else venturing here with a limited scope issue as mine.

if you use mvvm and your itemssource is located in your vm. just call INotifyPropertyChanged for your collection property when you want to refresh.

OnPropertyChanged("YourCollectionProperty");

A ListView is a specialized ListBox (that is, it inherits from ListBox). It allows you to specify different views rather than a straight list. You can either roll your own view, or use GridView (think explorer-like "details view"). It's basically the multi-column listbox, the cousin of windows form's listview.

If you don't need the additional capabilities of ListView, you can certainly use ListBox if you're simply showing a list of items (Even if the template is complex).

Remove the spaces around your =:

<div>    
  <input type="text" [(ngModel)]="str" name="str">
</div>

But you need to have the variable named str on back-end, than its should work fine.

You should clear out your listbbox prior to binding:

 Me.ddl2.Items.Clear()
  ' now set datasource and bind

Try this:

    ServersTable.Columns.Clear();
    ServersTable.DataSource = SBind;

If you don't want to clear all the existing columns, you have to set DataPropertyName for each existing column like this:

for (int i = 0; i < ServersTable.ColumnCount; ++i) {
  DTable.Columns.Add(new DataColumn(ServersTable.Columns[i].Name));
  ServersTable.Columns[i].DataPropertyName = ServersTable.Columns[i].Name;
}

Name2 is a field. WPF binds only to properties. Change it to:

public string Name2 { get; set; }

Be warned that with this minimal implementation, your TextBox won't respond to programmatic changes to Name2. So for your timer update scenario, you'll need to implement INotifyPropertyChanged:

partial class Window1 : Window, INotifyPropertyChanged
{
  public event PropertyChangedEventHandler PropertyChanged;

  protected void OnPropertyChanged(string propertyName)
  {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
  }

  private string _name2;

  public string Name2
  {
    get { return _name2; }
    set
    {
      if (value != _name2)
      {
         _name2 = value;
         OnPropertyChanged("Name2");
      }
    }
  }
}

You should consider moving this to a separate data object rather than on your Window class.

Made a version of the accepted answer that handles unsubscription.

public class DataGridColumnsBehavior
{
    public static readonly DependencyProperty BindableColumnsProperty =
        DependencyProperty.RegisterAttached("BindableColumns",
                                            typeof(ObservableCollection<DataGridColumn>),
                                            typeof(DataGridColumnsBehavior),
                                            new UIPropertyMetadata(null, BindableColumnsPropertyChanged));

    /// <summary>Collection to store collection change handlers - to be able to unsubscribe later.</summary>
    private static readonly Dictionary<DataGrid, NotifyCollectionChangedEventHandler> _handlers;

    static DataGridColumnsBehavior()
    {
        _handlers = new Dictionary<DataGrid, NotifyCollectionChangedEventHandler>();
    }

    private static void BindableColumnsPropertyChanged(DependencyObject source, DependencyPropertyChangedEventArgs e)
    {
        DataGrid dataGrid = source as DataGrid;

        ObservableCollection<DataGridColumn> oldColumns = e.OldValue as ObservableCollection<DataGridColumn>;
        if (oldColumns != null)
        {
            // Remove all columns.
            dataGrid.Columns.Clear();

            // Unsubscribe from old collection.
            NotifyCollectionChangedEventHandler h;
            if (_handlers.TryGetValue(dataGrid, out h))
            {
                oldColumns.CollectionChanged -= h;
                _handlers.Remove(dataGrid);
            }
        }

        ObservableCollection<DataGridColumn> newColumns = e.NewValue as ObservableCollection<DataGridColumn>;
        dataGrid.Columns.Clear();
        if (newColumns != null)
        {
            // Add columns from this source.
            foreach (DataGridColumn column in newColumns)
                dataGrid.Columns.Add(column);

            // Subscribe to future changes.
            NotifyCollectionChangedEventHandler h = (_, ne) => OnCollectionChanged(ne, dataGrid);
            _handlers[dataGrid] = h;
            newColumns.CollectionChanged += h;
        }
    }

    static void OnCollectionChanged(NotifyCollectionChangedEventArgs ne, DataGrid dataGrid)
    {
        switch (ne.Action)
        {
            case NotifyCollectionChangedAction.Reset:
                dataGrid.Columns.Clear();
                foreach (DataGridColumn column in ne.NewItems)
                    dataGrid.Columns.Add(column);
                break;
            case NotifyCollectionChangedAction.Add:
                foreach (DataGridColumn column in ne.NewItems)
                    dataGrid.Columns.Add(column);
                break;
            case NotifyCollectionChangedAction.Move:
                dataGrid.Columns.Move(ne.OldStartingIndex, ne.NewStartingIndex);
                break;
            case NotifyCollectionChangedAction.Remove:
                foreach (DataGridColumn column in ne.OldItems)
                    dataGrid.Columns.Remove(column);
                break;
            case NotifyCollectionChangedAction.Replace:
                dataGrid.Columns[ne.NewStartingIndex] = ne.NewItems[0] as DataGridColumn;
                break;
        }
    }

    public static void SetBindableColumns(DependencyObject element, ObservableCollection<DataGridColumn> value)
    {
        element.SetValue(BindableColumnsProperty, value);
    }

    public static ObservableCollection<DataGridColumn> GetBindableColumns(DependencyObject element)
    {
        return (ObservableCollection<DataGridColumn>)element.GetValue(BindableColumnsProperty);
    }
}

            SqlConnection conn = new SqlConnection(@"Data Source=TOM-PC\sqlexpress;Initial Catalog=Northwind;User ID=sa;Password=xyz") ;
            conn.Open();
            SqlCommand sc = new SqlCommand("select customerid,contactname from customers", conn);
            SqlDataReader reader;

            reader = sc.ExecuteReader();
            DataTable dt = new DataTable();
            dt.Columns.Add("customerid", typeof(string));
            dt.Columns.Add("contactname", typeof(string));
            dt.Load(reader);

            comboBox1.ValueMember = "customerid";
            comboBox1.DisplayMember = "contactname";
            comboBox1.DataSource = dt;

            conn.Close();

If we want to bind to a dictionary ie

  <ComboBox SelectedValue="{Binding Pathology, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" 
                              ItemsSource="{x:Static RnxGlobal:CLocalizedEnums.PathologiesValues}" DisplayMemberPath="Value" SelectedValuePath="Key"
                              Margin="{StaticResource SmallMarginLeftBottom}"/>

then SelectedItem will not work whilist SelectedValue will

The problem with the answer that was chosen here is that when navigating back and forth, the converter will get triggered every time the page is shown.

This causes new file handles to be created continuously and will block any attempt to delete the file because it is still in use. This can be verified by using Process Explorer.

If the image file might be deleted at some point, a converter such as this might be used: using XAML to bind to a System.Drawing.Image into a System.Windows.Image control

The disadvantage with this memory stream method is that the image(s) get loaded and decoded every time and no caching can take place: "To prevent images from being decoded more than once, assign the Image.Source property from an Uri rather than using memory streams" Source: "Performance tips for Windows Store apps using XAML"

To solve the performance issue, the repository pattern can be used to provide a caching layer. The caching could take place in memory, which may cause memory issues, or as thumbnail files that reside in a temp folder that can be cleared when the app exits.

The way your radios are set up in the fiddle - sharing the same model - will cause only the last group to show a checked radio if you decide to quote all of the truthy values. A more solid approach will involve giving the individual groups their own model, and set the value as a unique attribute of the radios, such as the id:

$scope.radioMod = 1;
$scope.radioMod2 = 2;

Here is a representation of the new html:

<label data-ng-repeat="choice2 in question2.choices">
            <input type="radio" name="response2" data-ng-model="radioMod2" value="{{choice2.id}}"/>
                {{choice2.text}}
        </label>

And a fiddle.

Unfortunately solution provided by @hakani is not two-way binding. It just handles One-way changing model from UI/FrontEnd part.

Instead the simple:

<input [(ngModel)]="checkboxFlag" type="checkbox"/>

will do two-way binding for checkbox.

Afterwards, when Model checkboxFlag is changed from Backend or UI part - voila, checkboxFlag stores actual checkbox state.

To be sure I've prepared Plunker code to present the result : https://plnkr.co/edit/OdEAPWRoqaj0T6Yp0Mfk

Just to complete this answer you should include the import { FormsModule } from '@angular/forms' into app.module.ts and add to imports array i.e

import { FormsModule } from '@angular/forms';

[...]

@NgModule({
  imports: [
    [...]
    FormsModule
  ],
  [...]
})

cmbEmployeeStatus.Text = "text"

I know this is a way late, but I thought I'd add yet another way of doing this.

You can take advantage of the fact that the Text property can be set using "Runs", so you can set up multiple bindings using a Run for each one. This is useful if you don't have access to MultiBinding (which I didn't find when developing for Windows Phone)

<TextBlock>
  <Run Text="Name = "/>
  <Run Text="{Binding Name}"/>
  <Run Text=", Id ="/>
  <Run Text="{Binding Id}"/>
</TextBlock>

If appears to me that rows where Visible is set to false won't be accessible, that they are removed from the DOM rather than hidden, so I also used the Display: None approach. In my case, I wanted to have a hidden column that contained the key of the Row. To me, this declarative approach is a little cleaner than some of the other approaches that use code.

<style>
   .HiddenCol{display:none;}                
</style>


 <%--ROW ID--%>
      <asp:TemplateField HeaderText="Row ID">
       <HeaderStyle CssClass="HiddenCol" />
       <ItemTemplate>
       <asp:Label ID="lblROW_ID" runat="server" Text='<%# Bind("ROW_ID") %>'></asp:Label>
       </ItemTemplate>
       <ItemStyle HorizontalAlign="Right" CssClass="HiddenCol" />
       <EditItemTemplate>
       <asp:TextBox ID="txtROW_ID" runat="server" Text='<%# Bind("ROW_ID") %>'></asp:TextBox>
       </EditItemTemplate>
       <FooterStyle CssClass="HiddenCol" />
      </asp:TemplateField>

I used these code Hope it could help

dataGridView2.Rows[n].Cells[3].Value = item[2].ToString();
dataGridView2.Rows[n].Cells[3].Value = Convert.ToDateTime(item[2].ToString()).ToString("d");

To bind the data to ComboBox

List<ComboData> ListData = new List<ComboData>();
ListData.Add(new ComboData { Id = "1", Value = "One" });
ListData.Add(new ComboData { Id = "2", Value = "Two" });
ListData.Add(new ComboData { Id = "3", Value = "Three" });
ListData.Add(new ComboData { Id = "4", Value = "Four" });
ListData.Add(new ComboData { Id = "5", Value = "Five" });

cbotest.ItemsSource = ListData;
cbotest.DisplayMemberPath = "Value";
cbotest.SelectedValuePath = "Id";

cbotest.SelectedValue = "2";

ComboData looks like:

public class ComboData
{ 
  public int Id { get; set; } 
  public string Value { get; set; } 
}

(note that Id and Value have to be properties, not class fields)

McGarnagle has a great answer, and you'll want to be accepting his, but I thought I'd mention (since you asked) how databinding works.

It's generally implemented by firing events whenever a change is made to the data, which then causes listeners (e.g. the UI) to be updated.

Two-way binding works by doing this twice, with a bit of care taken to ensure that you don't wind up stuck in an event loop (where the update from the event causes another event to be fired).

I was gonna put this in a comment, but it was getting pretty long...

Jackson is complaining because it can't find a field in your class Wrapper that's called "wrapper". It's doing this because your JSON object has a property called "wrapper".

I think the fix is to rename your Wrapper class's field to "wrapper" instead of "students".

if you have the property "MyProperty" on your data-class, then you bind the IsChecked like this.... (the converter is optional, but sometimes you need that)

<Window.Resources>
<local:MyBoolConverter x:Key="MyBoolConverterKey"/>
</Window.Resources>
<checkbox IsChecked="{Binding Path=MyProperty, Converter={StaticResource MyBoolConverterKey}}"/>

I was searching how to do something similar in WPF and I got this solution:

<ItemsControl ItemsSource="{Binding MyItems,Mode=OneWay}">
<ItemsControl.ItemsPanel>
    <ItemsPanelTemplate>
        <StackPanel Orientation="Vertical" />
    </ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
    <DataTemplate>
        <RadioButton 
            Content="{Binding}" 
            Command="{Binding Path=DataContext.CustomCommand, 
                        RelativeSource={RelativeSource Mode=FindAncestor,      
                        AncestorType={x:Type ItemsControl}} }"
            CommandParameter="{Binding}" />
    </DataTemplate>
</ItemsControl.ItemTemplate>

I hope this works for somebody else. I have a data context which is set automatically to the ItemsControls, and this data context has two properties: MyItems -which is a collection-, and one command 'CustomCommand'. Because of the ItemTemplate is using a DataTemplate, the DataContext of upper levels is not directly accessible. Then the workaround to get the DC of the parent is use a relative path and filter by ItemsControl type.

This can be achieved in a very simple way 1. Write this in the view.

<Button HorizontalAlignment="Center" VerticalAlignment="Center" Width="50" Height="30">
<Button.Style>
        <Style TargetType="Button">
                <Setter Property="Visibility" Value="Collapsed"/>
                        <Style.Triggers>
                                <DataTrigger Binding="{Binding IsHide}" Value="True">
                                        <Setter Property="Visibility" Value="Visible"/>
                                    </DataTrigger>
                            </Style.Triggers>
            </Style>
    </Button.Style>

2. The following is the Boolean property which holds the true/ false value. The following is the code snippet. In my example this property is in UserNote class.

   public bool _isHide = false;
   
   public bool IsHide
   {
   
   get { return _isHide; }
   
   set
       {
           _isHide = value;
               OnPropertyChanged("IsHide");
       }
   } 
   

3. This is the way the IsHide property gets the value.

   userNote.IsHide = userNote.IsNoteDeleted;
   

You should use the StringFormat on the Binding. You can use either standard string formats, or custom string formats:

<TextBox Text="{Binding Value, StringFormat=N2}" />
<TextBox Text="{Binding Value, StringFormat={}{0:#,#.00}}" />

Note that the StringFormat only works when the target property is of type string. If you are trying to set something like a Content property (typeof(object)), you will need to use a custom StringFormatConverter (like here), and pass your format string as the ConverterParameter.

Edit for updated question

So, if your ViewModel defines the precision, I'd recommend doing this as a MultiBinding, and creating your own IMultiValueConverter. This is pretty annoying in practice, to go from a simple binding to one that needs to be expanded out to a MultiBinding, but if the precision isn't known at compile time, this is pretty much all you can do. Your IMultiValueConverter would need to take the value, and the precision, and output the formatted string. You'd be able to do this using String.Format.

However, for things like a ContentControl, you can much more easily do this with a Style:

<Style TargetType="{x:Type ContentControl}">
    <Setter Property="ContentStringFormat" 
            Value="{Binding Resolution, StringFormat=N{0}}" />
</Style>

Any control that exposes a ContentStringFormat can be used like this. Unfortunately, TextBox doesn't have anything like that.

Bind any html input

<input id="element-to-bind" type="text">

define two functions:

function bindValue(objectToBind) {
var elemToBind = document.getElementById(objectToBind.id)    
elemToBind.addEventListener("change", function() {
    objectToBind.value = this.value;
})
}

function proxify(id) { 
var handler = {
    set: function(target, key, value, receiver) {
        target[key] = value;
        document.getElementById(target.id).value = value;
        return Reflect.set(target, key, value);
    },
}
return new Proxy({id: id}, handler);
}

use the functions:

var myObject = proxify('element-to-bind')
bindValue(myObject);

This is my basic understanding. It may well be wrong!

1. Items are watched by passing a function (returning the thing to be watched) to the $watch method.
2. Changes to watched items must be made within a block of code wrapped by the $apply method.
3. At the end of the $apply the $digest method is invoked which goes through each of the watches and checks to see if they changed since last time the $digest ran.
4. If any changes are found then the digest is invoked again until all changes stabilize.

In normal development, data-binding syntax in the HTML tells the AngularJS compiler to create the watches for you and controller methods are run inside $apply already. So to the application developer it is all transparent.

Whatever happens outside the Scope of Angular, Angular will never know that.

Digest cycle put the changes from the model -> controller and then from controller -> model.

If you need to see the latest Model, you need to trigger the digest cycle

But there is a chance of a digest cycle in progress, so we need to check and init the cycle.

Preferably, always perform a safe apply.

       $scope.safeApply = function(fn) {
            if (this.$root) {
                var phase = this.$root.$$phase;
                if (phase == '$apply' || phase == '$digest') {
                    if (fn && (typeof (fn) === 'function')) {
                        fn();
                    }
                } else {
                    this.$apply(fn);
                }
            }
        };


      $scope.safeApply(function(){
          // your function here.
      });

You might be interested in the BookLibrary sample application of the WPF Application Framework (WAF). It shows how to use validation in WPF and how to control the Save button when validation errors exists.

You need a bindingsource object to act as an intermediary and assist in the binding. Then instead of updating the user interface, update the underlining model.

var model = (Fruit) bindingSource1.DataSource;

model.FruitType = "oranges";

bindingSource.ResetBindings();

Read up on BindingSource and simple data binding for Windows Forms.

Your first example is effectively what you need:

<TextBlock Text="{Binding CelsiusTemp, StringFormat={}{0}°C}" />

StackBlitz

Template: You can either use the native change event or NgModel directive's ngModelChange.

<input type="checkbox" (change)="onNativeChange($event)"/>

or

<input type="checkbox" ngModel (ngModelChange)="onNgModelChange($event)"/>

TS:

onNativeChange(e) { // here e is a native event
  if(e.target.checked){
    // do something here
  }
}

onNgModelChange(e) { // here e is a boolean, true if checked, otherwise false
  if(e){
    // do something here
  }
}

You can do that to enable search in ng-keypress enter for input text and in ng-click for the icon:

<input type="text" ng-model="searchText" ng-keypress="keyEnter(this,$event)" />
<button ng-click="check(searchText)">Check!</button>

in the controller
$scope.search = function (searchText) {
        console.log(searchText);
    }
    $scope.keyEnter = function (serachText,$event) {
        var keyCode = $event.which || $event.keyCode;
        if (keyCode === 13) {//KeyCode for Enter key
           console.log(searchText);
        }
    }

When it comes to Muhammad Mehdi's answer, it is better to do:

private void salary_texbox_PreviewTextInput(object sender, TextCompositionEventArgs e)
{
     Regex regex = new Regex ( "[^0-9]+" );
     if(regex.IsMatch(e.Text))
     {
         MessageBox.Show("Error");
     }
}

Because when comparing with the TextCompositionEventArgs it gets also the last character, while with the textbox.Text it does not. With textbox, the error will show after next inserted character.

This will also work:

<Hyperlink Command="{Binding RelativeSource={RelativeSource AncestorType=ItemsControl},
                             Path=DataContext.AllowItemCommand}" />

ListView will inherit its DataContext from Window, so it's available at this point, too.
And since ListView, just like similar controls (e. g. Gridview, ListBox, etc.), is a subclass of ItemsControl, the Binding for such controls will work perfectly.

In .NET 4.5 it's possible to bind to static properties, read more

You can use static properties as the source of a data binding. The data binding engine recognizes when the property's value changes if a static event is raised. For example, if the class SomeClass defines a static property called MyProperty, SomeClass can define a static event that is raised when the value of MyProperty changes. The static event can use either of the following signatures:

public static event EventHandler MyPropertyChanged; 
public static event EventHandler<PropertyChangedEventArgs> StaticPropertyChanged; 

Note that in the first case, the class exposes a static event named PropertyNameChanged that passes EventArgs to the event handler. In the second case, the class exposes a static event named StaticPropertyChanged that passes PropertyChangedEventArgs to the event handler. A class that implements the static property can choose to raise property-change notifications using either method.

I think it's a better way to bind on the service itself instead of the attributes on it.

Here's why:

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.7/angular.min.js"></script>
<body ng-app="BindToService">

  <div ng-controller="BindToServiceCtrl as ctrl">
    ArrService.arrOne: <span ng-repeat="v in ArrService.arrOne">{{v}}</span>
    <br />
    ArrService.arrTwo: <span ng-repeat="v in ArrService.arrTwo">{{v}}</span>
    <br />
    <br />
    <!-- This is empty since $scope.arrOne never changes -->
    arrOne: <span ng-repeat="v in arrOne">{{v}}</span>
    <br />
    <!-- This is not empty since $scope.arrTwo === ArrService.arrTwo -->
    <!-- Both of them point the memory space modified by the `push` function below -->
    arrTwo: <span ng-repeat="v in arrTwo">{{v}}</span>
  </div>

  <script type="text/javascript">
    var app = angular.module("BindToService", []);

    app.controller("BindToServiceCtrl", function ($scope, ArrService) {
      $scope.ArrService = ArrService;
      $scope.arrOne = ArrService.arrOne;
      $scope.arrTwo = ArrService.arrTwo;
    });

    app.service("ArrService", function ($interval) {
      var that = this,
          i = 0;
      this.arrOne = [];
      that.arrTwo = [];

      $interval(function () {
        // This will change arrOne (the pointer).
        // However, $scope.arrOne is still same as the original arrOne.
        that.arrOne = that.arrOne.concat([i]);

        // This line changes the memory block pointed by arrTwo.
        // And arrTwo (the pointer) itself never changes.
        that.arrTwo.push(i);
        i += 1;
      }, 1000);

    });
  </script>
</body> 

You can play it on this plunker.

Use ObjectDataProvider:

<ObjectDataProvider x:Key="enumValues"
   MethodName="GetValues" ObjectType="{x:Type System:Enum}">
      <ObjectDataProvider.MethodParameters>
           <x:Type TypeName="local:ExampleEnum"/>
      </ObjectDataProvider.MethodParameters>
 </ObjectDataProvider>

and then bind to static resource:

ItemsSource="{Binding Source={StaticResource enumValues}}"

based on this article

Guys why bother with all the faff. This works perfectly. No code required

<RichTextBox>
    <FlowDocument>
        <Paragraph>
            <Run Text="{Binding Mytextbinding}"/>
        </Paragraph>
    </FlowDocument>
</RichTextBox>

Subscribing what basil said in a comment to the question itself, if method = RequestMethod.GET you can use @RequestParam List<String> groupVal.

Then calling the service with the list of params is as simple as:

API_URL?groupVal=kkk,ccc,mmm

You should do it in the xaml code:

<DataGrid ItemsSource="{Binding list}" [...]>
  [...]
</DataGrid>

I would advise you to use an ObservableCollection as your backing collection, as that would propagate changes to the datagrid, as it implements INotifyCollectionChanged.

Replace:

myBinding.Source = ViewModel.SomeString;

with:

myBinding.Source = ViewModel;

Example:

Binding myBinding = new Binding();
myBinding.Source = ViewModel;
myBinding.Path = new PropertyPath("SomeString");
myBinding.Mode = BindingMode.TwoWay;
myBinding.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged;
BindingOperations.SetBinding(txtText, TextBox.TextProperty, myBinding);

Your source should be just ViewModel, the .SomeString part is evaluated from the Path (the Path can be set by the constructor or by the Path property).

<!-- xaml code-->
    <Grid>
        <ComboBox Name="cmbData"    SelectedItem="{Binding SelectedstudentInfo, Mode=OneWayToSource}" HorizontalAlignment="Left" Margin="225,150,0,0" VerticalAlignment="Top" Width="120" DisplayMemberPath="name" SelectedValuePath="id" SelectedIndex="0" />
        <Button VerticalAlignment="Center" Margin="0,0,150,0" Height="40" Width="70" Click="Button_Click">OK</Button>
    </Grid>



        //student Class
        public class Student
        {
            public  int Id { set; get; }
            public string name { set; get; }
        }

        //set 2 properties in MainWindow.xaml.cs Class
        public ObservableCollection<Student> studentInfo { set; get; }
        public Student SelectedstudentInfo { set; get; }

        //MainWindow.xaml.cs Constructor
        public MainWindow()
        {
            InitializeComponent();
            bindCombo();
            this.DataContext = this;
            cmbData.ItemsSource = studentInfo;

        }

        //method to bind cobobox or you can fetch data from database in MainWindow.xaml.cs
        public void bindCombo()
        {
            ObservableCollection<Student> studentList = new ObservableCollection<Student>();
            studentList.Add(new Student { Id=0 ,name="==Select=="});
            studentList.Add(new Student { Id = 1, name = "zoyeb" });
            studentList.Add(new Student { Id = 2, name = "siddiq" });
            studentList.Add(new Student { Id = 3, name = "James" });

              studentInfo=studentList;

        }

        //button click to get selected student MainWindow.xaml.cs
        private void Button_Click(object sender, RoutedEventArgs e)
        {
            Student student = SelectedstudentInfo;
            if(student.Id ==0)
            {
                MessageBox.Show("select name from dropdown");
            }
            else
            {
                MessageBox.Show("Name :"+student.name + "Id :"+student.Id);
            }
        }

Try something like this:

yourControl.DataSource = countryInstance.Cities;

And if you are using WebForms you will need to add this line:

yourControl.DataBind();

Some useful bits and pieces:

Here's how to do it mostly in code:

Binding b = new Binding();
b.RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor, this.GetType(), 1);
b.Path = new PropertyPath("MyElementThatNeedsBinding");
MyLabel.SetBinding(ContentProperty, b);

I largely copied this from Binding Relative Source in code Behind.

Also, the MSDN page is pretty good as far as examples go: RelativeSource Class

In my case, I was missing a "name" attribute on my input element.

Based on the EnumToBooleanConverter from Scott. I noticed that the ConvertBack method doesn't work on the Enum with flags code.

I've tried the following code:

public class EnumHasFlagToBooleanConverter : IValueConverter
    {
        private object _obj;
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            _obj = value;
            return ((Enum)value).HasFlag((Enum)parameter);
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (value.Equals(true))
            {
                if (((Enum)_obj).HasFlag((Enum)parameter))
                {
                    // Do nothing
                    return Binding.DoNothing;
                }
                else
                {
                    int i = (int)_obj;
                    int ii = (int)parameter;
                    int newInt = i+ii;
                    return (NavigationProjectDates)newInt;
                }
            }
            else
            {
                if (((Enum)_obj).HasFlag((Enum)parameter))
                {
                    int i = (int)_obj;
                    int ii = (int)parameter;
                    int newInt = i-ii;
                    return (NavigationProjectDates)newInt;

                }
                else
                {
                    // do nothing
                    return Binding.DoNothing;
                }
            }
        }
    }

The only thing that I can't get to work is to do a cast from int to targetType so I made it hardcoded to NavigationProjectDates, the enum that I use. And, targetType == NavigationProjectDates...

Edit for more generic Flags Enum converter:

    public class FlagsEnumToBooleanConverter : IValueConverter {
        private int _flags=0;
        public object Convert(object value, Type targetType, object parameter, string language) {
            if (value == null) return false;
            _flags = (int) value;
            Type t = value.GetType();
            object o = Enum.ToObject(t, parameter);
            return ((Enum)value).HasFlag((Enum)o);
        }

        public object ConvertBack(object value, Type targetType, object parameter, string language)
        {
            if (value?.Equals(true) ?? false) {
                _flags = _flags | (int) parameter;
            }
            else {
                _flags = _flags & ~(int) parameter;
            }
            return _flags;
        }
    }

I liked Stefan Henze 's solution but it would pick up 34.56. Its too general and I have unparsed html. There are 4 anchors for a url;

www ,

http:\ (and co) ,

. followed by letters and then / ,

or letters . and one of these: https://ftp.isc.org/www/survey/reports/current/bynum.txt .

I used lots of info from this thread. Thank you all.

"(((((http|ftp|https|gopher|telnet|file|localhost):\\/\\/)|(www\\.)|(xn--)){1}([\\w_-]+(?:(?:\\.[\\w_-]+)+))([\\w.,@?^=%&:\\/~+#-]*[\\w@?^=%&\\/~+#-])?)|(([\\w_-]{2,200}(?:(?:\\.[\\w_-]+)*))((\\.[\\w_-]+\\/([\\w.,@?^=%&:\\/~+#-]*[\\w@?^=%&\\/~+#-])?)|(\\.((org|com|net|edu|gov|mil|int|arpa|biz|info|unknown|one|ninja|network|host|coop|tech)|(jp|br|it|cn|mx|ar|nl|pl|ru|tr|tw|za|be|uk|eg|es|fi|pt|th|nz|cz|hu|gr|dk|il|sg|uy|lt|ua|ie|ir|ve|kz|ec|rs|sk|py|bg|hk|eu|ee|md|is|my|lv|gt|pk|ni|by|ae|kr|su|vn|cy|am|ke))))))(?!(((ttp|tp|ttps):\\/\\/)|(ww\\.)|(n--)))"

Above solves just about everything except a string like "eurls:www.google.com,facebook.com,http://test.com/", which it returns as a single string. Tbh idk why I added gopher etc. Proof R code

if(T){
  wierdurl<-vector()
  wierdurl[1]<-"https://JP??.?.jp/dir1/?? "
  wierdurl[2]<-"xn--jp-cd2fp15c.xn--fsq.jp "
  wierdurl[3]<-"http://52.221.161.242/2018/11/23/biofourmis-collab"
  wierdurl[4]<-"https://12000.org/ "
  wierdurl[5]<-"  https://vg-1.com/?page_id=1002 "
  wierdurl[6]<-"https://3dnews.ru/822878"
  wierdurl[7]<-"The link of this question: https://stackoverflow.com/questions/6038061/regular-expression-to-find-urls-within-a-string
  Also there are some urls: www.google.com, facebook.com, http://test.com/method?param=wasd
  The code below catches all urls in text and returns urls in list. "
  wierdurl[8]<-"Thelinkofthisquestion:https://stackoverflow.com/questions/6038061/regular-expression-to-find-urls-within-a-string
  Alsotherearesomeurls:www.google.com,facebook.com,http://test.com/method?param=wasd
  Thecodebelowcatchesallurlsintextandreturnsurlsinlist. "
  wierdurl[9]<-"Thelinkofthisquestion:https://stackoverflow.com/questions/6038061/regular-expression-to-find-urls-within-a-stringAlsotherearesomeurlsZwww.google.com,facebook.com,http://test.com/method?param=wasdThecodebelowcatchesallurlsintextandreturnsurlsinlist."
  wierdurl[10]<-"1facebook.com/1res"
  wierdurl[11]<-"1facebook.com/1res/wat.txt"
  wierdurl[12]<-"www.e "
  wierdurl[13]<-"is this the file.txt i need"
  wierdurl[14]<-"xn--jp-cd2fp15c.xn--fsq.jpinspiredby "
  wierdurl[15]<-"[xn--jp-cd2fp15c.xn--fsq.jp/inspiredby "
  wierdurl[16]<-"xnto--jpto-cd2fp15c.xnto--fsq.jpinspiredby "
  wierdurl[17]<-"fsety--fwdvg-gertu56.ffuoiw--ffwsx.3dinspiredby "
  wierdurl[18]<-"://3dnews.ru/822878 "
  wierdurl[19]<-" http://mywebsite.com/msn.co.uk "
  wierdurl[20]<-" 2.0http://www.abe.hip "
  wierdurl[21]<-"www.abe.hip"
  wierdurl[22]<-"hardware/software/data"
  regexstring<-vector()
  regexstring[2]<-"(http|ftp|https)://([\\w_-]+(?:(?:\\.[\\w_-]+)+))([\\w.,@?^=%&:/~+#-]*[\\w@?^=%&/~+#-])?"
  regexstring[3]<-"/(?:(?:https?|ftp|file):\\/\\/|www\\.|ftp\\.)(?:\\([-A-Z0-9+&@#\\/%=~_|$?!:,.]*\\)|[-A-Z0-9+&@#\\/%=~_|$?!:,.])*(?:\\([-A-Z0-9+&@#\\/%=~_|$?!:,.]*\\)|[A-Z0-9+&@#\\/%=~_|$])/igm"
  regexstring[4]<-"[a-zA-Z0-9\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]?"
  regexstring[5]<-"((http|ftp|https)\\:\\/\\/)?([\\w_-]+(?:(?:\\.[\\w_-]+)+))([\\w.,@?^=%&:/~+#-]*[\\w@?^=%&/~+#-])?"
  regexstring[6]<-"((http|ftp|https):\\/\\/)?([\\w_-]+(?:(?:\\.[\\w_-]+)+))([\\w.,@?^=%&:\\/~+#-]*[\\w@?^=%&\\/~+#-])?"
  regexstring[7]<-"(http|ftp|https)(:\\/\\/)([\\w_-]+(?:(?:\\.[\\w_-]+)+))([\\w.,@?^=%&:/~+#-]*[\\w@?^=%&/~+#-])?"
  regexstring[8]<-"(?:(?:https?|ftp|file):\\/\\/|www\\.|ftp\\.)(?:\\([-A-Z0-9+&@#/%=~_|$?!:,.]*\\)|[-A-Z0-9+&@#/%=~_|$?!:,.])*(?:\\([-A-Z0-9+&@#/%=~_|$?!:,.]*\\)|[A-Z0-9+&@#/%=~_|$])"
  regexstring[10]<-"((http[s]?|ftp):\\/)?\\/?([^:\\/\\s]+)((\\/\\w+)*\\/)([\\w\\-\\.]+[^#?\\s]+)(.*)?(#[\\w\\-]+)?"
  regexstring[12]<-"http[s:/]+[[:alnum:]./]+"
  regexstring[9]<-"http[s:/]+[[:alnum:]./]+" #in DLpages 230
  regexstring[1]<-"[[:alnum:]-]+?[.][:alnum:]+?(?=[/ :])" #in link_graphs 50
  regexstring[13]<-"^(?!mailto:)(?:(?:http|https|ftp)://)(?:\\S+(?::\\S*)?@)?(?:(?:(?:[1-9]\\d?|1\\d\\d|2[01]\\d|22[0-3])(?:\\.(?:1?\\d{1,2}|2[0-4]\\d|25[0-5])){2}(?:\\.(?:[0-9]\\d?|1\\d\\d|2[0-4]\\d|25[0-4]))|(?:(?:[a-z\\u00a1-\\uffff0-9]+-?)*[a-z\\u00a1-\\uffff0-9]+)(?:\\.(?:[a-z\\u00a1-\\uffff0-9]+-?)*[a-z\\u00a1-\\uffff0-9]+)*(?:\\.(?:[a-z\\u00a1-\\uffff]{2,})))|localhost)(?::\\d{2,5})?(?:(/|\\?|#)[^\\s]*)?$"
  regexstring[14]<-"(((((http|ftp|https):\\/\\/)|(www\\.)|(xn--)){1}([\\w_-]+(?:(?:\\.[\\w_-]+)+))([\\w.,@?^=%&:\\/~+#-]*[\\w@?^=%&\\/~+#-])?)|(([\\w_-]+(?:(?:\\.[\\w_-]+)*))((\\.((org|com|net|edu|gov|mil|int)|(([:alpha:]{2})(?=[, ]))))|([\\/]([\\w.,@?^=%&:\\/~+#-]*[\\w@?^=%&\\/~+#-])?))))(?!(((ttp|tp|ttps):\\/\\/)|(ww\\.)|(n--)))"
  regexstring[15]<-"(((((http|ftp|https|gopher|telnet|file|localhost):\\/\\/)|(www\\.)|(xn--)){1}([\\w_-]+(?:(?:\\.[\\w_-]+)+))([\\w.,@?^=%&:\\/~+#-]*[\\w@?^=%&\\/~+#-])?)|(([\\w_-]{2,200}(?:(?:\\.[\\w_-]+)*))((\\.[\\w_-]+\\/([\\w.,@?^=%&:\\/~+#-]*[\\w@?^=%&\\/~+#-])?)|(\\.((org|com|net|edu|gov|mil|int|arpa|biz|info|unknown|one|ninja|network|host|coop|tech)|(jp|br|it|cn|mx|ar|nl|pl|ru|tr|tw|za|be|uk|eg|es|fi|pt|th|nz|cz|hu|gr|dk|il|sg|uy|lt|ua|ie|ir|ve|kz|ec|rs|sk|py|bg|hk|eu|ee|md|is|my|lv|gt|pk|ni|by|ae|kr|su|vn|cy|am|ke))))))(?!(((ttp|tp|ttps):\\/\\/)|(ww\\.)|(n--)))"
    }

for(i in wierdurl){#c(7,22)
  for(c in regexstring[c(15)]) {
    print(paste(i,which(regexstring==c)))
    print(str_extract_all(i,c))
  }
}

If the user exists you can get the user in user_object else user_object will be None.

try:
    user_object = User.objects.get(email = cleaned_info['username'])
except User.DoesNotExist:
    user_object = None
if user_object:
    # user exist
    pass
else:
    # user does not exist
    pass

radians = degrees * (pi/180)

degrees = radians * (180/pi)

As for implementation, the main question is how precise you want to be about the value of pi. There is some related discussion here

In case you're here looking for something to list the keys of an n-depth nested object as a flat array:

const getObjectKeys = (obj, prefix = '') => {_x000D_
  return Object.entries(obj).reduce((collector, [key, val]) => {_x000D_
    const newKeys = [ ...collector, prefix ? `${prefix}.${key}` : key ]_x000D_
    if (Object.prototype.toString.call(val) === '[object Object]') {_x000D_
      const newPrefix = prefix ? `${prefix}.${key}` : key_x000D_
      const otherKeys = getObjectKeys(val, newPrefix)_x000D_
      return [ ...newKeys, ...otherKeys ]_x000D_
    }_x000D_
    return newKeys_x000D_
  }, [])_x000D_
}_x000D_
_x000D_
console.log(getObjectKeys({a: 1, b: 2, c: { d: 3, e: { f: 4 }}}))

I also faced same problem. Finally this gonna work for me:

jQuery.fn.putCursorAtEnd =  = function() {

  return this.each(function() {

    // Cache references
    var $el = $(this),
        el = this;

    // Only focus if input isn't already
    if (!$el.is(":focus")) {
     $el.focus();
    }

    // If this function exists... (IE 9+)
    if (el.setSelectionRange) {

      // Double the length because Opera is inconsistent about whether a carriage return is one character or two.
      var len = $el.val().length * 2;

      // Timeout seems to be required for Blink
      setTimeout(function() {
        el.setSelectionRange(len, len);
      }, 1);

    } else {

      // As a fallback, replace the contents with itself
      // Doesn't work in Chrome, but Chrome supports setSelectionRange
      $el.val($el.val());

    }

    // Scroll to the bottom, in case we're in a tall textarea
    // (Necessary for Firefox and Chrome)
    this.scrollTop = 999999;

  });

};

This is how we can call this:

var searchInput = $("#searchInputOrTextarea");

searchInput
  .putCursorAtEnd() // should be chainable
  .on("focus", function() { // could be on any event
    searchInput.putCursorAtEnd()
  });

It's works for me in safari, IE, Chrome, Mozilla. On mobile devices I didn't tried this.

As Hunter McMillen mentioned, tuples are immutable, you need to create a new tuple in order to achieve this. For instance:

>>> tpl = ('275', '54000', '0.0', '5000.0', '0.0')
>>> change_value = 200
>>> tpl = (change_value,) + tpl[1:]
>>> tpl
(200, '54000', '0.0', '5000.0', '0.0')

Since you are conditionally indexing df$est, you also need to conditionally index the replacement vector df$a:

index <- df$b == 0
df$est[index] <- (df$a[index] - 5)/2.533 

Of course, the variable index is just temporary, and I use it to make the code a bit more readible. You can write it in one step:

df$est[df$b == 0] <- (df$a[df$b == 0] - 5)/2.533 

For even better readibility, you can use within:

df <- within(df, est[b==0] <- (a[b==0]-5)/2.533)

The results, regardless of which method you choose:

df
          a b      est
1  11.77000 2 0.000000
2  10.90000 3 0.000000
3  10.32000 2 0.000000
4  10.96000 0 2.352941
5   9.90600 0 1.936834
6  10.70000 0 2.250296
7  11.43000 1 0.000000
8  11.41000 2 0.000000
9  10.48512 4 0.000000
10 11.19000 0 2.443743

As others have pointed out, an alternative solution in your example is to use ifelse.

The answers in question you linked-to are all about configuring git so that you can enter very short git push commands and have them do whatever you want. Which is great, if you know what you want and how to spell that in Git-Ese, but you're new to git! :-)

In your case, Petr Mensik's answer is the (well, "a") right one. Here's why:

The command git push remote roots around in your .git/config file to find the named "remote" (e.g., origin). The config file lists:

• where (URL-wise) that remote "lives" (e.g., ssh://hostname/path)
• where pushes go, if different
• what gets pushed, if you didn't say what branch(es) to push
• what gets fetched when you run git fetch remote

When you first cloned the repo—whenever that was—git set up default values for some of these. The URL is whatever you cloned from and the rest, if set or unset, are all "reasonable" defaults ... or, hmm, are they?

The issue with these is that people have changed their minds, over time, as to what is "reasonable". So now (depending on your version of git and whether you've configured things in detail), git may print a lot of warnings about defaults changing in the future. Adding the name of the "branch to push"—amd_qlp_tester—(1) shuts it up, and (2) pushes just that one branch.

If you want to push more conveniently, you could do that with:

git push origin

or even:

git push

but whether that does what you want, depends on whether you agree with "early git authors" that the original defaults are reasonable, or "later git authors" that the original defaults aren't reasonable. So, when you want to do all the configuration stuff (eventually), see the question (and answers) you linked-to.

As for the name origin/amd_qlp_tester in the first place: that's actually a local entity (a name kept inside your repo), even though it's called a "remote branch". It's git's best guess at "where amd_qlp_tester is over there". Git updates it when it can.

While maybe not the most efficient, this would work:

declare @StartDate datetime, @EndDate datetime

select @StartDate = '10/01/2012 08:40:18.000',@EndDate='10/04/2012 09:52:48.000'

select convert(varchar(5),DateDiff(s, @startDate, @EndDate)/3600)+':'+convert(varchar(5),DateDiff(s, @startDate, @EndDate)%3600/60)+':'+convert(varchar(5),(DateDiff(s, @startDate, @EndDate)%60))

if you can run two selects then this would be better because you only do the datediff once:

declare @StartDate datetime, @EndDate datetime

select @StartDate = '10/01/2012 08:40:18.000',@EndDate='10/04/2012 09:52:48.000'
declare @Sec BIGINT

select @Sec = DateDiff(s, @startDate, @EndDate)

select convert(varchar(5),@sec/3600)+':'+convert(varchar(5),@sec%3600/60)+':'+convert(varchar(5),(@sec%60))

A recursive function for a change;) I use it to output the media information for videos etc elements of which can use nested array / attributes.

function custom_print_array($arr = array()) {
    $output = '';
    foreach($arr as $key => $val) {
        if(is_array($val)){
            $output .= '<li><strong>' . ucwords(str_replace('_',' ', $key)) . ':</strong><ul class="children">' . custom_print_array($val) . '</ul>' . '</li>';
        }
        else {
            $output .=  '<li><strong>' . ucwords(str_replace('_',' ', $key)) . ':</strong> ' . $val . '</li>';
        }
    }
    return $output;
}

My problem solve this one

compile fileTree(dir: 'libs', include: ['*.jar'])

to

provided fileTree(dir: 'libs', include: ['*.jar'])

A char consists of a single character and should be specified in single quotes. It can contain an alphabetic, numerical or even special character. below are a few examples:

char a = '4';
char b = '$';
char c = 'B';

A String defines a line can be used which is specified in double quotes. Below are a few examples:

String a = "Hello World";
String b = "1234";
String c = "%%";

Assuming code.cpp is the source code, the following will not throw errors:

make code
./code

Here the first command compiles the code and creates an executable with the same name, and the second command runs it. There is no need to specify g++ keyword in this case.

Yes,

with open('filename.txt') as fp:
    for line in fp:
        print line

is the way to go.

It is not more verbose. It is more safe.

Inspired by TheIT, I just got this to work by manipulating the manifest file but in a slightly different fashion. Set the icon in the application setting so that the majority of the activities get the icon. On the activity where you want to show the logo, add the android:logo attribute to the activity declaration. In the following example, only LogoActivity should have the logo, while the others will default to icon.

<application
    android:name="com.your.app"
    android:icon="@drawable/your_icon"
    android:label="@string/app_name">

    <activity
        android:name="com.your.app.LogoActivity"
        android:logo="@drawable/your_logo"
        android:label="Logo Activity" >

    <activity
        android:name="com.your.app.IconActivity1"
        android:label="Icon Activity 1" >

    <activity
        android:name="com.your.app.IconActivity2"
        android:label="Icon Activity 2" >

</application>

Hope this helps someone else out!

Construct a Calendar object and use the method add(Calendar.DATE, 1);

Join the table with itself and give it two different aliases (A and B in the following example). This allows to compare different rows of the same table.

SELECT DISTINCT A.Id
FROM
    Address A
    INNER JOIN Address B
        ON A.Id = B.Id AND A.[Adress Code] < B.[Adress Code]
WHERE
    A.Address <> B.Address

The "less than" comparison < ensures that you get 2 different addresses and you don't get the same 2 address codes twice. Using "not equal" <> instead, would yield the codes as (1, 2) and (2, 1); each one of them for the A alias and the B alias in turn.

The join clause is responsible for the pairing of the rows where as the where-clause tests additional conditions.

The query above works with any address codes. If you want to compare addresses with specific address codes, you can change the query to

SELECT A.Id
FROM
    Address A
    INNER JOIN Address B
        ON A.Id = B.Id
WHERE                     
    A.[Adress Code] = 1 AND
    B.[Adress Code] = 2 AND
    A.Address <> B.Address

I imagine that this might be useful to find customers having a billing address (Adress Code = 1 as an example) differing from the delivery address (Adress Code = 2) .

Inline styles cannot be used to target pseudo-classes or pseudo-elements. You need to use a stylesheet.

If you want to generate CSS dynamically, then the easiest way is to create a DOM element <style>.

<style dangerouslySetInnerHTML={{
  __html: [
     '.my-special-div:after {',
     '  content: "Hello";',
     '  position: absolute',
     '}'
    ].join('\n')
  }}>
</style>
<div className='my-special-div'></div>

After testing many options I've found that the following simple solution is loading the dynamically loaded scripts in the order in which they are added in all modern browsers

loadScripts(sources) {
    sources.forEach(src => {
        var script = document.createElement('script');
        script.src = src;
        script.async = false; //<-- the important part
        document.body.appendChild( script ); //<-- make sure to append to body instead of head 
    });
}

loadScripts(['/scr/script1.js','src/script2.js'])

I faced the similar issue.

Deselect the check box ("In wizard deselect the checkbox stating "First row has columns names") and before running the wizard make sure you have opened your excel sheet.

Then run the wizard by deselecting the checkbox.

This resolved my issue.

I was also getting the same problem, but i uninstalled all updates of java and now it is working very fine....

If you're on Windows:

Go to your php.ini file and remove the ; mark from the beginning of the following line:

;extension=php_curl.dll

After you have saved the file you must restart your HTTP server software (e.g. Apache) before this can take effect.

For Ubuntu 13.0 and above, simply use the debundled package. In a terminal type the following to install it and do not forgot to restart server.

sudo apt-get install php-curl

Or if you're using the old PHP5

sudo apt-get install php5-curl

or

sudo apt-get install php5.6-curl

Then restart apache to activate the package with

sudo service apache2 restart

The find library is designed for this task specifically: https://ruby-doc.org/stdlib-2.5.1/libdoc/find/rdoc/Find.html

require 'find'
Find.find(path) do |file|
  # process
end

This is a standard ruby library, so it should be available

You can store the SVG in a variable. Then manipulate the SVG string depending on your needs (i.e., set width, height, color, etc). Then use the result to set the background, e.g.

$circle-icon-svg: '<svg xmlns="http://www.w3.org/2000/svg"><circle cx="10" cy="10" r="10" /></svg>';

$icon-color: #f00;
$icon-color-hover: #00f;

@function str-replace($string, $search, $replace: '') {
    $index: str-index($string, $search);

    @if $index {
        @return str-slice($string, 1, $index - 1) + $replace + str-replace(str-slice($string, $index + str-length($search)), $search, $replace);
    }

    @return $string;
}

@function svg-fill ($svg, $color) {
  @return str-replace($svg, '<svg', '<svg fill="#{$color}"');
}

@function svg-size ($svg, $width, $height) {
  $svg: str-replace($svg, '<svg', '<svg width="#{$width}"');
  $svg: str-replace($svg, '<svg', '<svg height="#{$height}"');

  @return $svg;
}

.icon {
  $icon-svg: svg-size($circle-icon-svg, 20, 20);

  width: 20px; height: 20px; background: url('data:image/svg+xml;utf8,#{svg-fill($icon-svg, $icon-color)}');

  &:hover {
    background: url('data:image/svg+xml;utf8,#{svg-fill($icon-svg, $icon-color-hover)}');
  }
}

I have made a demo too, http://sassmeister.com/gist/4cf0265c5d0143a9e734.

This code makes a few assumptions about the SVG, e.g. that <svg /> element does not have an existing fill colour and that neither width or height properties are set. Since the input is hardcoded in the SCSS document, it is quite easy to enforce these constraints.

Do not worry about the code duplication. gzip compression makes the difference negligible.

Simply copy your Anaconda bin directory and paste it at the bottom of ~/.zshrc.

For me the path is /home/theorangeguy/miniconda3/bin, so I ran:

echo ". /home/theorangeguy/miniconda3/bin" >> ~/.zshrc

This edited the ~/.zshrc. Now do:

source ~/.zshrc

It worked like a charm.

This is working fine:

$('#country').val($("#country option:contains('It\'s Me')").val());

Lodash has a simple Dictionary implementation and has good TypeScript support

Install Lodash:

npm install lodash @types/lodash --save

Import and usage:

import { Dictionary } from "lodash";
let properties : Dictionary<string> = {
    "key": "value"        
}
console.log(properties["key"])

TL;DR: The trick is to modify os.environment before you import settings/base.py in any settings/<purpose>.py, this will greatly simplify things.

Just thinking about all these intertwining files gives me a headache. Combining, importing (sometimes conditionally), overriding, patching of what was already set in case DEBUG setting changed later on. What a nightmare!

Through the years I went through all different solutions. They all somewhat work, but are so painful to manage. WTF! Do we really need all that hassle? We started with just one settings.py file. Now we need a documentation just to correctly combine all these together in a correct order!

I hope I finally hit the (my) sweet spot with the solution below.

Let's recap the goals (some common, some mine)

1. Keep secrets a secret — don't store them in a repo!

2. Set/read keys and secrets through environment settings, 12 factor style.

3. Have sensible fallback defaults. Ideally for local development you don't need anything more beside defaults.

4. …but try to keep defaults production safe. It's better to miss a setting override locally, than having to remember to adjust default settings safe for production.

5. Have the ability to switch DEBUG on/off in a way that can have an effect on other settings (eg. using javascript compressed or not).

6. Switching between purpose settings, like local/testing/staging/production, should be based only on DJANGO_SETTINGS_MODULE, nothing more.

7. …but allow further parameterization through environment settings like DATABASE_URL.

8. …also allow them to use different purpose settings and run them locally side by side, eg. production setup on local developer machine, to access production database or smoke test compressed style sheets.

9. Fail if an environment variable is not explicitly set (requiring an empty value at minimum), especially in production, eg. EMAIL_HOST_PASSWORD.

10. Respond to default DJANGO_SETTINGS_MODULE set in manage.py during django-admin startproject

11. Keep conditionals to a minimum, if the condition is the purposed environment type (eg. for production set log file and it's rotation), override settings in associated purposed settings file.

Do not's

1. Do not let django read DJANGO_SETTINGS_MODULE setting form a file.
   Ugh! Think of how meta this is. If you need to have a file (like docker env) read that into the environment before staring up a django process.

2. Do not override DJANGO_SETTINGS_MODULE in your project/app code, eg. based on hostname or process name.
   If you are lazy to set environment variable (like for setup.py test) do it in tooling just before you run your project code.

3. Avoid magic and patching of how django reads it's settings, preprocess the settings but do not interfere afterwards.

4. No complicated logic based nonsense. Configuration should be fixed and materialized not computed on the fly. Providing a fallback defaults is just enough logic here.
   Do you really want to debug, why locally you have correct set of settings but in production on a remote server, on one of hundred machines, something computed differently? Oh! Unit tests? For settings? Seriously?

Solution

My strategy consists of excellent django-environ used with ini style files, providing os.environment defaults for local development, some minimal and short settings/<purpose>.py files that have an import settings/base.py AFTER the os.environment was set from an INI file. This effectively give us a kind of settings injection.

The trick here is to modify os.environment before you import settings/base.py.

To see the full example go do the repo: https://github.com/wooyek/django-settings-strategy

.
¦   manage.py
+---data
+---website
    +---settings
    ¦   ¦   __init__.py   <-- imports local for compatibility
    ¦   ¦   base.py       <-- almost all the settings, reads from proces environment 
    ¦   ¦   local.py      <-- a few modifications for local development
    ¦   ¦   production.py <-- ideally is empty and everything is in base 
    ¦   ¦   testing.py    <-- mimics production with a reasonable exeptions
    ¦   ¦   .env          <-- for local use, not kept in repo
    ¦   __init__.py
    ¦   urls.py
    ¦   wsgi.py

settings/.env

A defaults for local development. A secret file, to mostly set required environment variables. Set them to empty values if they are not required in local development. We provide defaults here and not in settings/base.py to fail on any other machine if the're missing from the environment.

settings/local.py

What happens in here, is loading environment from settings/.env, then importing common settings from settings/base.py. After that we can override a few to ease local development.

import logging
import environ

logging.debug("Settings loading: %s" % __file__)

# This will read missing environment variables from a file
# We wan to do this before loading a base settings as they may depend on environment
environ.Env.read_env(DEBUG='True')

from .base import *

ALLOWED_HOSTS += [
    '127.0.0.1',
    'localhost',
    '.example.com',
    'vagrant',
    ]

# https://docs.djangoproject.com/en/1.6/topics/email/#console-backend
EMAIL_BACKEND = 'django.core.mail.backends.console.EmailBackend'
# EMAIL_BACKEND = 'django.core.mail.backends.dummy.EmailBackend'

LOGGING['handlers']['mail_admins']['email_backend'] = 'django.core.mail.backends.dummy.EmailBackend'

# Sync task testing
# http://docs.celeryproject.org/en/2.5/configuration.html?highlight=celery_always_eager#celery-always-eager

CELERY_ALWAYS_EAGER = True
CELERY_EAGER_PROPAGATES_EXCEPTIONS = True

settings/production.py

For production we should not expect an environment file, but it's easier to have one if we're testing something. But anyway, lest's provide few defaults inline, so settings/base.py can respond accordingly.

environ.Env.read_env(Path(__file__) / "production.env", DEBUG='False', ASSETS_DEBUG='False')
from .base import *

The main point of interest here are DEBUG and ASSETS_DEBUG overrides, they will be applied to the python os.environ ONLY if they are MISSING from the environment and the file.

These will be our production defaults, no need to put them in the environment or file, but they can be overridden if needed. Neat!

settings/base.py

These are your mostly vanilla django settings, with a few conditionals and lot's of reading them from the environment. Almost everything is in here, keeping all the purposed environments consistent and as similar as possible.

The main differences are below (I hope these are self explanatory):

import environ

# https://github.com/joke2k/django-environ
env = environ.Env()

# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

# Where BASE_DIR is a django source root, ROOT_DIR is a whole project root
# It may differ BASE_DIR for eg. when your django project code is in `src` folder
# This may help to separate python modules and *django apps* from other stuff
# like documentation, fixtures, docker settings
ROOT_DIR = BASE_DIR

# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/1.11/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = env('SECRET_KEY')

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = env('DEBUG', default=False)

INTERNAL_IPS = [
    '127.0.0.1',
]

ALLOWED_HOSTS = []

if 'ALLOWED_HOSTS' in os.environ:
    hosts = os.environ['ALLOWED_HOSTS'].split(" ")
    BASE_URL = "https://" + hosts[0]
    for host in hosts:
        host = host.strip()
        if host:
            ALLOWED_HOSTS.append(host)

SECURE_SSL_REDIRECT = env.bool('SECURE_SSL_REDIRECT', default=False)

# Database
# https://docs.djangoproject.com/en/1.11/ref/settings/#databases

if "DATABASE_URL" in os.environ:  # pragma: no cover
    # Enable database config through environment
    DATABASES = {
        # Raises ImproperlyConfigured exception if DATABASE_URL not in os.environ
        'default': env.db(),
    }

    # Make sure we use have all settings we need
    # DATABASES['default']['ENGINE'] = 'django.contrib.gis.db.backends.postgis'
    DATABASES['default']['TEST'] = {'NAME': os.environ.get("DATABASE_TEST_NAME", None)}
    DATABASES['default']['OPTIONS'] = {
        'options': '-c search_path=gis,public,pg_catalog',
        'sslmode': 'require',
    }
else:
    DATABASES = {
        'default': {
            'ENGINE': 'django.db.backends.sqlite3',
            # 'ENGINE': 'django.contrib.gis.db.backends.spatialite',
            'NAME': os.path.join(ROOT_DIR, 'data', 'db.dev.sqlite3'),
            'TEST': {
                'NAME': os.path.join(ROOT_DIR, 'data', 'db.test.sqlite3'),
            }
        }
    }

STATIC_ROOT = os.path.join(ROOT_DIR, 'static')

# django-assets
# http://django-assets.readthedocs.org/en/latest/settings.html

ASSETS_LOAD_PATH = STATIC_ROOT
ASSETS_ROOT = os.path.join(ROOT_DIR, 'assets', "compressed")
ASSETS_DEBUG = env('ASSETS_DEBUG', default=DEBUG)  # Disable when testing compressed file in DEBUG mode
if ASSETS_DEBUG:
    ASSETS_URL = STATIC_URL
    ASSETS_MANIFEST = "json:{}".format(os.path.join(ASSETS_ROOT, "manifest.json"))
else:
    ASSETS_URL = STATIC_URL + "assets/compressed/"
    ASSETS_MANIFEST = "json:{}".format(os.path.join(STATIC_ROOT, 'assets', "compressed", "manifest.json"))
ASSETS_AUTO_BUILD = ASSETS_DEBUG
ASSETS_MODULES = ('website.assets',)

The last bit shows the power here. ASSETS_DEBUG has a sensible default, which can be overridden in settings/production.py and even that that can be overridden by an environment setting! Yay!

In effect we have a mixed hierarchy of importance:

1. settings/.py - sets defaults based on purpose, does not store secrets
2. settings/base.py - is mostly controlled by environment
3. process environment settings - 12 factor baby!
4. settings/.env - local defaults for easy startup

Since I was not too happy with the output of other (non-tree) answers (see my comment at Hassou's answer), I tried to mimic trees output a bit more.

It's similar to the answer of Robert but the horizontal lines do not all start at the beginning, but where there are supposed to start. Had to use perl though, but in my case, on the system where I don't have tree, perl is available.

ls -aR | grep ":$" | perl -pe 's/:$//;s/[^-][^\/]*\//    /g;s/^    (\S)/+-- \1/;s/(^    |    (?= ))/¦   /g;s/    (\S)/+-- \1/'

Output (shortened):

.
+-- fd
+-- net
¦   +-- dev_snmp6
¦   +-- nfsfs
¦   +-- rpc
¦   ¦   +-- auth.unix.ip
¦   +-- stat
¦   +-- vlan
+-- ns
+-- task
¦   +-- 1310
¦   ¦   +-- net
¦   ¦   ¦   +-- dev_snmp6
¦   ¦   ¦   +-- rpc
¦   ¦   ¦   ¦   +-- auth.unix.gid
¦   ¦   ¦   ¦   +-- auth.unix.ip
¦   ¦   ¦   +-- stat
¦   ¦   ¦   +-- vlan
¦   ¦   +-- ns

Suggestions to avoid the superfluous vertical lines are welcome :-)

I still like Ben's solution in the comment of Hassou's answer very much, without the (not perfectly correct) lines it's much cleaner. For my use case I additionally removed the global indentation and added the option to also ls hidden files, like so:

ls -aR | grep ":$" | sed -e 's/:$//' -e 's/[^-][^\/]*\//  /g'

Output (shortened even more):

.
  fd
  net
    dev_snmp6
    nfsfs
    rpc
      auth.unix.ip
    stat
    vlan
  ns

Server side put this on top of .php:

 header('Access-Control-Allow-Origin: *');  

You can set specific domain restriction access:

header('Access-Control-Allow-Origin: https://www.example.com')

I'm not sure there's a way to only see system messages regarding your app, but you can filter based on a string. If you're doing a log within the program, you can just include a certain unique keyword, and filter based on that word.

Three years later, perhaps with the renewed emphasis on WebApi and xml data, I came across this question. Since codewise I am inclined to follow Skeet out of an airplane without a parachute, and seeing his initial code doubly corraborated by the MS Xml team article as well as an example in BOL Streaming Transform of Large Xml Docs, I very quickly overlooked the other comments, most specifically from 'pbz', who pointed out that if you have the same elements by name in succession, every other one is skipped because of the double read. And in fact, the BOL and MS blog articles both were parsing source documents with target elements nested deeper than second level, masking this side-effect.

The other answers address this problem. I just wanted to offer a slightly simpler revision that seems to work well so far, and takes into account that the xml might come from different sources, not just a uri, and so the extension works on the user managed XmlReader. The one assumption is that the reader is in its initial state, since otherwise the first 'Read()' might advance past a desired node:

public static IEnumerable<XElement> ElementsNamed(this XmlReader reader, string elementName)
{
    reader.MoveToContent(); // will not advance reader if already on a content node; if successful, ReadState is Interactive
    reader.Read();          // this is needed, even with MoveToContent and ReadState.Interactive
    while(!reader.EOF && reader.ReadState == ReadState.Interactive)
    {
        // corrected for bug noted by Wes below...
        if(reader.NodeType == XmlNodeType.Element && reader.Name.Equals(elementName))
        {
             // this advances the reader...so it's either XNode.ReadFrom() or reader.Read(), but not both
             var matchedElement = XNode.ReadFrom(reader) as XElement;
             if(matchedElement != null)
                 yield return matchedElement;
        }
        else
            reader.Read();
    }
}

Another way based on amadan:

    SELECT * FROM [Purchasing].[Vendor] WHERE  

      ( (@url IS null OR @url = '' OR @url = 'ALL') and   PurchasingWebServiceURL LIKE '%')
    or

       ( @url = 'blank' and  PurchasingWebServiceURL = '')
    or
        (@url = 'fail' and  PurchasingWebServiceURL NOT LIKE '%treyresearch%')
    or( (@url not in ('fail','blank','','ALL') and @url is not null and 
          PurchasingWebServiceUrl Like '%'+@ur+'%') 
END

If you are on Linux:

sudo service virtualbox restart

select P.*,
A.Street,
A.City,
A.State
from Preson P
inner join Address A on P.id=A.Person_id
where A.Zip=97229
Order by A.Street,A.City,A.State

As previously mentioned, you have to write it. Here is my humble version: (super basic one)

function tprint (t, s)
    for k, v in pairs(t) do
        local kfmt = '["' .. tostring(k) ..'"]'
        if type(k) ~= 'string' then
            kfmt = '[' .. k .. ']'
        end
        local vfmt = '"'.. tostring(v) ..'"'
        if type(v) == 'table' then
            tprint(v, (s or '')..kfmt)
        else
            if type(v) ~= 'string' then
                vfmt = tostring(v)
            end
            print(type(t)..(s or '')..kfmt..' = '..vfmt)
        end
    end
end

example:

local mytbl = { ['1']="a", 2, 3, b="c", t={d=1} }
tprint(mytbl)

output (Lua 5.0):

table[1] = 2
table[2] = 3
table["1"] = "a"
table["t"]["d"] = 1
table["b"] = "c"

In SQL, I would have do it in one shot as

update table1 set col1 = new_value where col1 = old_value

but in Python Pandas, we could just do this:

data = [['ram', 10], ['sam', 15], ['tam', 15]] 
kids = pd.DataFrame(data, columns = ['Name', 'Age']) 
kids

which will generate the following output :

    Name    Age
0   ram     10
1   sam     15
2   tam     15

now we can run:

kids.loc[kids.Age == 15,'Age'] = 17
kids

which will show the following output

Name    Age
0   ram     10
1   sam     17
2   tam     17

which should be equivalent to the following SQL

update kids set age = 17 where age = 15

Neither of them worked for me for some reason.

I figured it out that for some reason python doesn't read %s. So use (?) instead of %S in you SQL Code.

And finally this worked for me.

   cursor.execute ("update tablename set columnName = (?) where ID = (?) ",("test4","4"))
   connect.commit()

When you want to put your Servlet file in your custom location or with custom name, rather than the default naming convention [servletname]-servlet.xml and path under Web-INF/ ,then you can use ContextLoaderListener.

For the same issue on Windows7

You will see an error like this if your environment variables/ system variables are incorrectly set:

Fatal Python error: Py_Initialize: unable to load the file system codec
ImportError: No module named 'encodings'

Current thread 0x00001db4 (most recent call first):

Fixing this is really simple:

1. When you download Python3.x version, and run the .exe file, it gives you an option to customize where in your system you want to install Python. For example, I chose this location: C:\Program Files\Python36

2. Then open system properties and go to "Advanced" tab (Or you can simply do this: Go to Start > Search for "environment variables" > Click on "Edit the system environment variables".) Under the "Advanced" tab, look for "Environment Variables" and click it. Another window with name "Environment Variables" will pop up.

3. Now make sure your user variables have the correct Python path listed in "Path Variable". In my example here, you should see C:\Program Files\Python36. If you do not find it there, add it, by selecting Path Variable field and clicking Edit.

4. Last step is to double-check PYTHONHOME and PYTHONPATH fields under System Variables in the same window. You should see the same path as described above. If not add it there too.

Then click OK and go back to CMD terminal, and try checking for python. The issue should now be resolved. It worked for me.

I think this is a simple and easy way to compare two lists element by element

x=[1,2,3,5,4,8,7,11,12,45,96,25]
y=[2,4,5,6,8,7,88,9,6,55,44,23]

tmp = []


for i in range(len(x)) and range(len(y)):
    if x[i]>y[i]:
        tmp.append(1)
    else:
        tmp.append(0)
print(tmp)

If you need to process huge amount of data with high performance

OR

If data model is not predetermined

then

NoSQL database is a better choice.

There are 3 ways I can think of:

The way that is easiest to explain is

:%s/phrase to delete//gc

but you can also (personally I use this second one more often) do a regular search for the phrase to delete

/phrase to delete

Vim will take you to the beginning of the next occurrence of the phrase.

Go into insert mode (hit i) and use the Delete key to remove the phrase.

Hit escape when you have deleted all of the phrase.

Now that you have done this one time, you can hit n to go to the next occurrence of the phrase and then hit the dot/period "." key to perform the delete action you just performed

Continue hitting n and dot until you are done.

Lastly you can do a search for the phrase to delete (like in second method) but this time, instead of going into insert mode, you

Count the number of characters you want to delete

Type that number in (with number keys)

Hit the x key - characters should get deleted

Continue through with n and dot like in the second method.

PS - And if you didn't know already you can do a capital n to move backwards through the search matches.

openecry.com is a broker with plenty of information on an API and instructions on how to do yours. There are also other brokers with the OEC platform and all the bells and whistles a pro could ask for.

First you have to call the function as they told you or the founction will display nothing in the output, after that save the file and copy the path of the file by right click to the folder of the file and click on"copy file" then go to terminal and write: - cd "the path of the file" - python "name of the file for example (main.py)" after that it will display the output of your code.

• Put a context menu on your form, name it, set captions etc. using the built-in editor
• Link it to your grid using the grid property ContextMenuStrip
• For your grid, create an event to handle CellContextMenuStripNeeded
• The Event Args e has useful properties e.ColumnIndex, e.RowIndex.

I believe that e.RowIndex is what you are asking for.

Suggestion: when user causes your event CellContextMenuStripNeeded to fire, use e.RowIndex to get data from your grid, such as the ID. Store the ID as the menu event's tag item.

Now, when user actually clicks your menu item, use the Sender property to fetch the tag. Use the tag, containing your ID, to perform the action you need.

I followed some tips from the rest answers and discovered that these odd actions helped (at least in my case).

1) I added to server block the following:

location ~ \.css {
 add_header Content-Type text/css;
}

I reloaded nginx and got this in error.log:

2015/06/18 11:32:29 [error] 3430#3430: *169 open() "/etc/nginx/html/css/mysite.css" failed (2: No such file or directory)

2) I deleted the rows, reloaded nginx and got working css. I can't explain what happend because my conf file became such as before.

My case was clean xubuntu 14.04 on VirtualBox, nginx/1.9.2, a row 127.51.1.1 mysite in /etc/hosts and pretty simple /etc/nginx/nginx.conf with a server block:

user nginx;
worker_processes 1;

error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;

events {
    worker_connections  1024;
}

http {
    include /etc/nginx/mime.types;

    server {
        listen 80;
        server_name mysite;

        location / {
            root /home/testuser/dev/mysite/;
        }
    }
}

My problem was I had czech characters (c,ú,u,á,ó) in the project folder path.

Answer to my question (after several Google searches) revealed the following:

$ curl https://pkgconfig.freedesktop.org/releases/pkg-config-0.29.tar.gz -o pkgconfig.tgz
$ tar -zxf pkgconfig.tgz && cd pkg-config-0.29
$ ./configure && make install

from the following link: Link showing above

Thanks to everyone for their comments, and sorry for my linux/OSX ignorance!

Doing this fixed my issues as mentioned above.

Well (a long one) ... if you insist to have $scope access inside a service, you can:

Create a getter/setter service

ngapp.factory('Scopes', function (){
  var mem = {};
  return {
    store: function (key, value) { mem[key] = value; },
    get: function (key) { return mem[key]; }
  };
});

Inject it and store the controller scope in it

ngapp.controller('myCtrl', ['$scope', 'Scopes', function($scope, Scopes) {
  Scopes.store('myCtrl', $scope);
}]);

Now, get the scope inside another service

ngapp.factory('getRoute', ['Scopes', '$http', function(Scopes, $http){
  // there you are
  var $scope = Scopes.get('myCtrl');
}]);

Not really, no.

Java doesn't have pointers. If you really wanted you could try to emulate them by building around something like reflection, but it would have all of the complexity of pointers with none of the benefits.

Java doesn't have pointers because it doesn't need them. What kind of answers were you hoping for from this question, i.e. deep down did you hope you could use them for something or was this just curiousity?

import xlwt

def output(filename, sheet, list1, list2, x, y, z):
    book = xlwt.Workbook()
    sh = book.add_sheet(sheet)

    variables = [x, y, z]
    x_desc = 'Display'
    y_desc = 'Dominance'
    z_desc = 'Test'
    desc = [x_desc, y_desc, z_desc]

    col1_name = 'Stimulus Time'
    col2_name = 'Reaction Time'

    #You may need to group the variables together
    #for n, (v_desc, v) in enumerate(zip(desc, variables)):
    for n, v_desc, v in enumerate(zip(desc, variables)):
        sh.write(n, 0, v_desc)
        sh.write(n, 1, v)

    n+=1

    sh.write(n, 0, col1_name)
    sh.write(n, 1, col2_name)

    for m, e1 in enumerate(list1, n+1):
        sh.write(m, 0, e1)

    for m, e2 in enumerate(list2, n+1):
        sh.write(m, 1, e2)

    book.save(filename)

for more explanation: https://github.com/python-excel

I don't know what they're trying to say with this "React Context" stuff - they're talking Greek, to me, but here's how I did it:

Carrying values between functions, on the same page

In your constructor, bind your setter:

this.setSomeVariable = this.setSomeVariable.bind(this);

Then declare a function just below your constructor:

setSomeVariable(propertyTextToAdd) {
    this.setState({
        myProperty: propertyTextToAdd
    });
}

When you want to set it, call this.setSomeVariable("some value");

(You might even be able to get away with this.state.myProperty = "some value";)

When you want to get it, call var myProp = this.state.myProperty;

Using alert(myProp); should give you some value .

Extra scaffolding method to carry values across pages/components

You can assign a model to this (technically this.stores), so you can then reference it with this.state:

import Reflux from 'reflux'
import Actions from '~/actions/actions`

class YourForm extends Reflux.Store
{
    constructor()
    {
        super();
        this.state = {
            someGlobalVariable: '',
        };
        this.listenables = Actions;
        this.baseState = {
            someGlobalVariable: '',
        };
    }

    onUpdateFields(name, value) {
        this.setState({
            [name]: value,
        });
    }

    onResetFields() {
        this.setState({
           someGlobalVariable: '',
        });
    }
}
const reqformdata = new YourForm

export default reqformdata

Save this to a folder called stores as yourForm.jsx.

Then you can do this in another page:

import React from 'react'
import Reflux from 'reflux'
import {Form} from 'reactstrap'
import YourForm from '~/stores/yourForm.jsx'

Reflux.defineReact(React)

class SomePage extends Reflux.Component {
    constructor(props) {
        super(props);
        this.state = {
            someLocalVariable: '',
        }
        this.stores = [
            YourForm,
        ]
    }
    render() {

        const myVar = this.state.someGlobalVariable;
        return (
            <Form>
                <div>{myVar}</div>
            </Form>
        )
    }
}
export default SomePage

If you had set this.state.someGlobalVariable in another component using a function like:

setSomeVariable(propertyTextToAdd) {
    this.setState({
       myGlobalVariable: propertyTextToAdd
   });
}

that you bind in the constructor with:

this.setSomeVariable = this.setSomeVariable.bind(this);

the value in propertyTextToAdd would be displayed in SomePage using the code shown above.

Use which(mydata_2$height_chad1 == 2585)

Short example

df <- data.frame(x = c(1,1,2,3,4,5,6,3),
                 y = c(5,4,6,7,8,3,2,4))
df
  x y
1 1 5
2 1 4
3 2 6
4 3 7
5 4 8
6 5 3
7 6 2
8 3 4

which(df$x == 3)
[1] 4 8

length(which(df$x == 3))
[1] 2

count(df, vars = "x")
  x freq
1 1    2
2 2    1
3 3    2
4 4    1
5 5    1
6 6    1

df[which(df$x == 3),]
  x y
4 3 7
8 3 4

As Matt Weller pointed out, you can use the length function. The count function in plyr can be used to return the count of each unique column value.

It would still make sense to create your zip code field as a zerofilled unsigned integer field.

CREATE TABLE xxx ( zipcode INT(5) ZEROFILL UNSIGNED, ... )

That way mysql takes care of the padding for you.

Rule 1: You can not add a new table without specifying the primary key constraint[not a good practice if you create it somehow]. So the code:

CREATE TABLE transactions( 
id int NOT NULL AUTO_INCREMENT, 
location varchar(50) NOT NULL, 
description varchar(50) NOT NULL, 
category varchar(50) NOT NULL, 
amount double(10,9) NOT NULL, 
type varchar(6) NOT NULL,  
notes varchar(512), 
receipt int(10), 
PRIMARY KEY(id));

Rule 2: You are not allowed to use the keywords(words with predefined meaning) as a field name. Here type is something like that is used(commonly used with Join Types). So the code:

CREATE TABLE transactions( 
id int NOT NULL AUTO_INCREMENT, 
location varchar(50) NOT NULL, 
description varchar(50) NOT NULL, 
category varchar(50) NOT NULL, 
amount double(10,9) NOT NULL, 
transaction_type varchar(6) NOT NULL,  
notes varchar(512), 
receipt int(10), 
PRIMARY KEY(id));

Now you please try with this code. First check it in your database user interface(I am running HeidiSQL, or you can try it in your xampp/wamp server also)and make sure this code works. Now delete the table from your db and execute the code in your program. Thank You.

This worked for me.

jQuery('#grid').jqGrid('clearGridData');
jQuery('#grid').jqGrid('setGridParam', {data: dataToLoad});
jQuery('#grid').trigger('reloadGrid');

check the stack size per thread with ulimit, in my case Redhat Linux 2.6:

    ulimit -a
...
    stack size              (kbytes, -s) 10240

Each of your threads will get this amount of memory (10MB) assigned for it's stack. With a 32bit program and a maximum address space of 4GB, that is a maximum of only 4096MB / 10MB = 409 threads !!! Minus program code, minus heap-space will probably lead to an observed max. of 300 threads.

You should be able to raise this by compiling and running on 64bit or setting ulimit -s 8192 or even ulimit -s 4096. But if this is advisable is another discussion...

import matplotlib.pyplot as plt
image = plt.imread('images/my_image4.jpg')
plt.imshow(image)

Using 'matplotlib.pyplot.imread' is recommended by warning messages in jupyter.

General way:

##text=List of strings to be written to file
with open('csvfile.csv','wb') as file:
    for line in text:
        file.write(line)
        file.write('\n')

OR

Using CSV writer :

import csv
with open(<path to output_csv>, "wb") as csv_file:
        writer = csv.writer(csv_file, delimiter=',')
        for line in data:
            writer.writerow(line)

OR

Simplest way:

f = open('csvfile.csv','w')
f.write('hi there\n') #Give your csv text here.
## Python will convert \n to os.linesep
f.close()

I did the CSS way with my install of Bootstrap 3.0.0, since I am not that familiar with LESS. Here is the code that I added to my custom css file (which I load after bootstrap.css) which allowed me to control so the menu was always working like an accordion.
Note: I wrapped my whole navbar inside a div with the class sidebar to separate out the behavior I wanted so it did not affect other navbars on my site, like the main menu. Adjust along your needs, hope it is of help.

/* Sidebar Menu Fix */

.sidebar .navbar-nav {
  margin: 7.5px -15px;
}
.sidebar .navbar-nav > li > a {
  padding-top: 10px;
  padding-bottom: 10px;
  line-height: 20px;
}
.sidebar .navbar-collapse {
  max-height: 500px;
}
.sidebar .navbar-nav .open .dropdown-menu {
  position: static;
  float: none;
  width: auto;
  margin-top: 0;
  background-color: transparent;
  border: 0;
  box-shadow: none;
}
.sidebar .dropdown-menu > li > a {
  color: #777777;
}
.sidebar .navbar-default .navbar-nav .open .dropdown-menu > li > a:hover,
.sidebar .navbar-default .navbar-nav .open .dropdown-menu > li > a:focus {
  color: #333333;
  background-color: transparent;
}
.sidebar .navbar-default .navbar-nav .open .dropdown-menu > .active > a,
.sidebar .navbar-default .navbar-nav .open .dropdown-menu > .active > a:hover,
.sidebar .navbar-default .navbar-nav .open .dropdown-menu > .active > a:focus {
  color: #555555;
  background-color: #e7e7e7;
}
.sidebar .navbar-nav {
  float: none;
}
.sidebar .navbar-nav > li {
  float: none;
}

Additional note: I also added a change to the toggle of the main menu navbar (since the code above on my site is used for a "submenu" on the side.

I changed:

<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">

into:

<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse-topmenu">

And then also adjusted:

<div class="navbar-collapse collapse navbar-collapse">

into:

<div class="navbar-collapse collapse navbar-collapse-topmenu">

If you will only have one navbar I guess you will not need to worry about this, but it helped me in my case.

The sort method and sorted function allow you to provide a custom function to extract the key used for comparison:

>>> ls = ['Q1.3', 'Q6.1', 'Q1.2']
>>> sorted(ls, key=lambda x: float(x[1:]))
['Q1.2', 'Q1.3', 'Q6.1']

You can create a function with the pattern ShouldSerialize{PropertyName} which tells the XmlSerializer if it should serialize the member or not.

For example, if your class property is called MyNullableInt you could have

public bool ShouldSerializeMyNullableInt() 
{
  return MyNullableInt.HasValue;
}

Here is a full sample

public class Person
{
  public string Name {get;set;}
  public int? Age {get;set;}
  public bool ShouldSerializeAge()
  {
    return Age.HasValue;
  }
}

Serialized with the following code

Person thePerson = new Person(){Name="Chris"};
XmlSerializer xs = new XmlSerializer(typeof(Person));
StringWriter sw = new StringWriter();
xs.Serialize(sw, thePerson);

Results in the followng XML - Notice there is no Age

<Person xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <Name>Chris</Name>
</Person>

For doing this in iOS 7:

[[UINavigationBar appearance] setBarTintColor:myColor];

I liked @mate64's answer so I am going to reuse that with slight modifications to create a slide down and up animations below:

var $slider = document.getElementById('slider');_x000D_
var $toggle = document.getElementById('toggle');_x000D_
_x000D_
$toggle.addEventListener('click', function() {_x000D_
    var isOpen = $slider.classList.contains('slide-in');_x000D_
_x000D_
    $slider.setAttribute('class', isOpen ? 'slide-out' : 'slide-in');_x000D_
});

#slider {_x000D_
    position: absolute;_x000D_
    width: 100px;_x000D_
    height: 100px;_x000D_
    background: blue;_x000D_
    transform: translateY(-100%);_x000D_
    -webkit-transform: translateY(-100%);_x000D_
}_x000D_
_x000D_
.slide-in {_x000D_
    animation: slide-in 0.5s forwards;_x000D_
    -webkit-animation: slide-in 0.5s forwards;_x000D_
}_x000D_
_x000D_
.slide-out {_x000D_
    animation: slide-out 0.5s forwards;_x000D_
    -webkit-animation: slide-out 0.5s forwards;_x000D_
}_x000D_
    _x000D_
@keyframes slide-in {_x000D_
    100% { transform: translateY(0%); }_x000D_
}_x000D_
_x000D_
@-webkit-keyframes slide-in {_x000D_
    100% { -webkit-transform: translateY(0%); }_x000D_
}_x000D_
    _x000D_
@keyframes slide-out {_x000D_
    0% { transform: translateY(0%); }_x000D_
    100% { transform: translateY(-100%); }_x000D_
}_x000D_
_x000D_
@-webkit-keyframes slide-out {_x000D_
    0% { -webkit-transform: translateY(0%); }_x000D_
    100% { -webkit-transform: translateY(-100%); }_x000D_
}

<div id="slider" class="slide-in">_x000D_
    <ul>_x000D_
        <li>Lorem</li>_x000D_
        <li>Ipsum</li>_x000D_
        <li>Dolor</li>_x000D_
    </ul>_x000D_
</div>_x000D_
_x000D_
<button id="toggle" style="position:absolute; top: 120px;">Toggle</button>

Here is sample code (Ref from: Safe Area Layout Guide):
If you create your constraints in code use the safeAreaLayoutGuide property of UIView to get the relevant layout anchors. Let’s recreate the above Interface Builder example in code to see how it looks:

Assuming we have the green view as a property in our view controller:

private let greenView = UIView()

We might have a function to set up the views and constraints called from viewDidLoad:

private func setupView() {
  greenView.translatesAutoresizingMaskIntoConstraints = false
  greenView.backgroundColor = .green
  view.addSubview(greenView)
}

Create the leading and trailing margin constraints as always using the layoutMarginsGuide of the root view:

 let margins = view.layoutMarginsGuide
 NSLayoutConstraint.activate([
    greenView.leadingAnchor.constraint(equalTo: margins.leadingAnchor),
    greenView.trailingAnchor.constraint(equalTo: margins.trailingAnchor)
 ])

Now, unless you are targeting iOS 11 and later, you will need to wrap the safe area layout guide constraints with #available and fall back to top and bottom layout guides for earlier iOS versions:

if #available(iOS 11, *) {
  let guide = view.safeAreaLayoutGuide
  NSLayoutConstraint.activate([
   greenView.topAnchor.constraintEqualToSystemSpacingBelow(guide.topAnchor, multiplier: 1.0),
   guide.bottomAnchor.constraintEqualToSystemSpacingBelow(greenView.bottomAnchor, multiplier: 1.0)
   ])
} else {
   let standardSpacing: CGFloat = 8.0
   NSLayoutConstraint.activate([
   greenView.topAnchor.constraint(equalTo: topLayoutGuide.bottomAnchor, constant: standardSpacing),
   bottomLayoutGuide.topAnchor.constraint(equalTo: greenView.bottomAnchor, constant: standardSpacing)
   ])
}

Result:

Here is Apple Developer Official Documentation for Safe Area Layout Guide

Safe Area is required to handle user interface design for iPhone-X. Here is basic guideline for How to design user interface for iPhone-X using Safe Area Layout

The logic is clear till finish printing out 13. Then the exception thrown in q() is caught by catch (Exception i) in main() and a new MyEx2() is ready to be thrown. However, before throwing the exception, the finally block have to be executed first. Then the output becomes 132 and finally asks to thrown another exception new MyEx1().

As a method cannot throw more than one Exception, it will always throw the latest Exception. In other words, if both catch and finally blocks try to throw Exception, then the Exception in catch is swallowed and only the exception in finally will be thrown.

Thus, in this program, Exception MyEx2 is swallowed and MyEx1 is thrown. This Exception is thrown out of main() and no longer caught, thus JVM stops and the final output is 132Exception in thread main MyExc1.

In essence, if you have a finally in a try/catch clause, a finally will be executed AFTER catching the exception, but BEFORE throwing any caught exception, and ONLY the lastest exception would be thrown in the end.

Thanks to unutbu for the explanation. By default numpy.cov calculates the sample covariance. To obtain the population covariance you can specify normalisation by the total N samples like this:

Covariance = numpy.cov(a, b, bias=True)[0][1]
print(Covariance)

or like this:

Covariance = numpy.cov(a, b, ddof=0)[0][1]
print(Covariance)

You can write extention method:

public static async Task<Tout> ReadAsAsync<Tout>(this System.Net.Http.HttpContent content) {
    return Newtonsoft.Json.JsonConvert.DeserializeObject<Tout>(await content.ReadAsStringAsync());
}

All major browsers now include native JSON encoding/decoding.

// To encode an object (This produces a string)
var json_str = JSON.stringify(myobject); 

// To decode (This produces an object)
var obj = JSON.parse(json_str);

Note that only valid JSON data will be encoded. For example:

var obj = {'foo': 1, 'bar': (function (x) { return x; })}
JSON.stringify(obj) // --> "{\"foo\":1}"

Valid JSON types are: objects, strings, numbers, arrays, true, false, and null.

Some JSON resources:

• JSON on Mozilla Developer Network
• JSON on Wikipedia

In SQL Management Studio you can expand the columns in Object Explorer, then drag the Columns tree item into a query window to get a comma separated list of columns.

I had to reinstall openssl:

brew uninstall --force openssl
brew install openssl

this worked for me, with kotlin

fun formatToDigitalClock(miliSeconds: Long): String {
        val hours = TimeUnit.MILLISECONDS.toHours(miliSeconds).toInt() % 24
        val minutes = TimeUnit.MILLISECONDS.toMinutes(miliSeconds).toInt() % 60
        val seconds = TimeUnit.MILLISECONDS.toSeconds(miliSeconds).toInt() % 60
        return when {
            hours > 0 -> String.format("%d:%02d:%02d", hours, minutes, seconds)
            minutes > 0 -> String.format("%02d:%02d", minutes, seconds)
            seconds > 0 -> String.format("00:%02d", seconds)
            else -> {
                "00:00"
            }
        }
    }

How about

sub foo()
  dim r As Range, rows As Long, i As Long
  Set r = ActiveSheet.Range("A1:Z50")
  rows = r.rows.Count
  For i = rows To 1 Step (-1)
    If WorksheetFunction.CountA(r.rows(i)) = 0 Then r.rows(i).Delete
  Next
End Sub

Try this

Option Explicit

Sub Sample()
    Dim i As Long
    Dim DelRange As Range

    On Error GoTo Whoa

    Application.ScreenUpdating = False

    For i = 1 To 50
        If Application.WorksheetFunction.CountA(Range("A" & i & ":" & "Z" & i)) = 0 Then
            If DelRange Is Nothing Then
                Set DelRange = Range("A" & i & ":" & "Z" & i)
            Else
                Set DelRange = Union(DelRange, Range("A" & i & ":" & "Z" & i))
            End If
        End If
    Next i

    If Not DelRange Is Nothing Then DelRange.Delete shift:=xlUp
LetsContinue:
    Application.ScreenUpdating = True

    Exit Sub
Whoa:
    MsgBox Err.Description
    Resume LetsContinue
End Sub

IF you want to delete the entire row then use this code

Option Explicit

Sub Sample()
    Dim i As Long
    Dim DelRange As Range

    On Error GoTo Whoa

    Application.ScreenUpdating = False

    For i = 1 To 50
        If Application.WorksheetFunction.CountA(Range("A" & i & ":" & "Z" & i)) = 0 Then
            If DelRange Is Nothing Then
                Set DelRange = Rows(i)
            Else
                Set DelRange = Union(DelRange, Rows(i))
            End If
        End If
    Next i

    If Not DelRange Is Nothing Then DelRange.Delete shift:=xlUp
LetsContinue:
    Application.ScreenUpdating = True

    Exit Sub
Whoa:
    MsgBox Err.Description
    Resume LetsContinue
End Sub

Rda is just a short name for RData. You can just save(), load(), attach(), etc. just like you do with RData.

Rds stores a single R object. Yet, beyond that simple explanation, there are several differences from a "standard" storage. Probably this R-manual Link to readRDS() function clarifies such distinctions sufficiently.

So, answering your questions:

• The difference is not about the compression, but serialization (See this page)
• Like shown in the manual page, you may wanna use it to restore a certain object with a different name, for instance.
• You may readRDS() and save(), or load() and saveRDS() selectively.

In your JSOn file, please make below change.

 {
    "data":
    [
      {
        "id": 1,
        "name": "Safa",
        "email": "[email protected]",
        "purpose": "thesis",
        "programme": "Software Engineering",
        "year": 2016,
        "language": "Estonian",
        "comments": "In need of correcting a dangling participle.",
        "status": "RECEIVED"
      },
      {
        "id": 2,
        "name": "Safa",
        "email": "[email protected]",
        "purpose": "thesis",
        "programme": "Software Engineering",
        "year": 2016,
        "language": "Estonian",
        "comments": "In need of correcting a dangling participle.",
        "status": "RECEIVED"
      },
      {
        "id": 3,
        "name": "Salman",
        "email": "[email protected]",
        "purpose": "thesis",
        "programme": "Software Engineering",
        "year": 2016,
        "language": "Estonian",
        "comments": "In need of correcting a dangling participle.",
        "status": "RECEIVED"
      }
    ]
    }

And after that:

 this.http.get(url).map(res:Response) => res.json().data);

The data is actually the name of tge collection of json file. Please try the code above, I am sure it will work.

df.gdp = df.gdp.shift(-1) ## shift up
df.gdp.drop(df.gdp.shape[0] - 1,inplace = True) ## removing the last row

The default is height: auto in browser, but height: X% Defines the height in percentage of the containing block.

I'm a bit late to the party but I wrote a custom view that let's you do this, by default it's set to entypo, but you can modify it to use any iconfont: check it out here: github.com/MarsVard/IconView

// edit the library is old and not supported anymore... new one here https://github.com/MarsVard/IonIconView

And if you want to specify select's ID:

$("#nextPageLink").click(function(){
  $('#myselect option:selected').next('option').attr('selected', 'selected');
  $("#myselect").change();
});

If you click on item with id "nextPageLink", next option will be selected and onChange() event will be called. It may look like this:

$("#myselect").change(function(){
  $('#myDivId').load(window.location.pathname,{myvalue:$("select#myselect").val()});
});

OnChange() event uses Ajax to load something into specified div.

window.location.pathname = actual address

OnChange() event is defined because it allowes you to change value not only using netx/prev button, but directly using standard selection. If value is changed, page does somethig automatically.

Give full access of .composer to user.

sudo chown -R 'user-name' /home/'user-name'/.composer

or

sudo chmod 777 -R /home/'user-name'/.composer

user-name is your system user-name.

to get user-name type "whoami" in terminal:

Update for C++11

As of the C++11 standard, string-to-number conversion and vice-versa are built in into the standard library. All the following functions are present in <string> (as per paragraph 21.5).

string to numeric

float              stof(const string& str, size_t *idx = 0);
double             stod(const string& str, size_t *idx = 0);
long double        stold(const string& str, size_t *idx = 0);
int                stoi(const string& str, size_t *idx = 0, int base = 10);
long               stol(const string& str, size_t *idx = 0, int base = 10);
unsigned long      stoul(const string& str, size_t *idx = 0, int base = 10);
long long          stoll(const string& str, size_t *idx = 0, int base = 10);
unsigned long long stoull(const string& str, size_t *idx = 0, int base = 10);

Each of these take a string as input and will try to convert it to a number. If no valid number could be constructed, for example because there is no numeric data or the number is out-of-range for the type, an exception is thrown (std::invalid_argument or std::out_of_range).

If conversion succeeded and idx is not 0, idx will contain the index of the first character that was not used for decoding. This could be an index behind the last character.

Finally, the integral types allow to specify a base, for digits larger than 9, the alphabet is assumed (a=10 until z=35). You can find more information about the exact formatting that can parsed here for floating-point numbers, signed integers and unsigned integers.

Finally, for each function there is also an overload that accepts a std::wstring as it's first parameter.

numeric to string

string to_string(int val);
string to_string(unsigned val);
string to_string(long val);
string to_string(unsigned long val);
string to_string(long long val);
string to_string(unsigned long long val);
string to_string(float val);
string to_string(double val);
string to_string(long double val);

These are more straightforward, you pass the appropriate numeric type and you get a string back. For formatting options you should go back to the C++03 stringsream option and use stream manipulators, as explained in an other answer here.

As noted in the comments these functions fall back to a default mantissa precision that is likely not the maximum precision. If more precision is required for your application it's also best to go back to other string formatting procedures.

There are also similar functions defined that are named to_wstring, these will return a std::wstring.

1. go to location android/android-sdk/platform-tools
2. shift+right click

3. open cmd here and type the following commands

   1. adb shell
   2. su
   3. svc wifi enable/disable

4. done!!!!!

Update to the answer

    // Get stack trace for the exception with source file information
    var st = new StackTrace(ex, true);
    // Get the top stack frame
    var frame = st.GetFrame(st.FrameCount-1);
    // Get the line number from the stack frame
    var line = frame.GetFileLineNumber();

This should work:

var result = cmd.ExecuteScalar();
conn.Close();

return result != null ? result.ToString() : string.Empty;

Also, I'd suggest using Parameters in your query, something like (just a suggestion):

var cmd = new SqlCommand
{
    Connection = conn,
    CommandType = CommandType.Text,
    CommandText = "select COUNT(idemp_atd) absentDayNo from td_atd where absentdate_atd between @sdate and @edate and idemp_atd=@idemp group by idemp_atd"
};

cmd.Parameters.AddWithValue("@sdate", sdate);
cmd.Parameters.AddWithValue("@edate", edate);
// etc ...

Cross-browser rotate for any element. Works in IE7 and IE8. In IE7 it looks like not working in JSFiddle but in my project worked also in IE7

http://jsfiddle.net/RgX86/24/

var elementToRotate = $('#rotateMe');
var degreeOfRotation = 33;

var deg = degreeOfRotation;
var deg2radians = Math.PI * 2 / 360;
var rad = deg * deg2radians ;
var costheta = Math.cos(rad);
var sintheta = Math.sin(rad);

var m11 = costheta;
var m12 = -sintheta;
var m21 = sintheta;
var m22 = costheta;
var matrixValues = 'M11=' + m11 + ', M12='+ m12 +', M21='+ m21 +', M22='+ m22;

elementToRotate.css('-webkit-transform','rotate('+deg+'deg)')
    .css('-moz-transform','rotate('+deg+'deg)')
    .css('-ms-transform','rotate('+deg+'deg)')
    .css('transform','rotate('+deg+'deg)')
    .css('filter', 'progid:DXImageTransform.Microsoft.Matrix(sizingMethod=\'auto expand\','+matrixValues+')')
    .css('-ms-filter', 'progid:DXImageTransform.Microsoft.Matrix(SizingMethod=\'auto expand\','+matrixValues+')');

Edit 13/09/13 15:00 Wrapped in a nice and easy, chainable, jquery plugin.

Example of use

$.fn.rotateElement = function(angle) {
    var elementToRotate = this,
        deg = angle,
        deg2radians = Math.PI * 2 / 360,
        rad = deg * deg2radians ,
        costheta = Math.cos(rad),
        sintheta = Math.sin(rad),

        m11 = costheta,
        m12 = -sintheta,
        m21 = sintheta,
        m22 = costheta,
        matrixValues = 'M11=' + m11 + ', M12='+ m12 +', M21='+ m21 +', M22='+ m22;

    elementToRotate.css('-webkit-transform','rotate('+deg+'deg)')
        .css('-moz-transform','rotate('+deg+'deg)')
        .css('-ms-transform','rotate('+deg+'deg)')
        .css('transform','rotate('+deg+'deg)')
        .css('filter', 'progid:DXImageTransform.Microsoft.Matrix(sizingMethod=\'auto expand\','+matrixValues+')')
        .css('-ms-filter', 'progid:DXImageTransform.Microsoft.Matrix(SizingMethod=\'auto expand\','+matrixValues+')');
    return elementToRotate;
}

$element.rotateElement(15);

JSFiddle: http://jsfiddle.net/RgX86/175/

The official ports (TCP:5222 and TCP:5269) are listed in RFC 6120. Contrary to the claims of a previous answer, XEP-0174 does not specify a port. Thus TCP:5298 might be customary for Link-Local XMPP, but is not official.

You can use other ports than the reserved ones, though: You can make your DNS SRV record point to any machine and port you like.

File transfers (XEP-0234) are these days handled using Jingle (XEP-0166). The same goes for RTP sessions (XEP-0167). They do not specify ports, though, since Jingle negotiates the creation of the data stream between the XMPP clients, but the actual data is then transferred by other means (e.g. RTP) through that stream (i.e. not usually through the XMPP server, even though in-band transfers are possible). Beware that Jingle is comprised of several XEPs, so make sure to have a look at the whole list of XMPP extensions.

Just use this this decrypter to decrypt your locally cached username & password.

By default, TortoiseSVN stores your cached credentials inside files in the %APPDATA%\Subversion\auth\svn.simple directory. The passwords are encrypted using the Windows Data Protection API, with a key tied to your user account. This tool reads the files and uses the API to decrypt your passwords

svn password decryptor

The REST API of Instagram has been discontinued. But you can use GraphQL to get the desired data. Here you can find an overview: https://developers.facebook.com/docs/instagram-api

Luke's answer didn't work for me. The 'New Window' command was already listed in the customize settings, but not showing up in the .js tabs context menu, despite deleting the registry setting.

So I used:

Tools

Customize...

Keyboard...

Scroll down to select Window.NewWindow

And I pressed and assigned the shortcut keys, Ctrl + Shift + W.

That worked for me.

==== EDIT ====

Well, 'worked' was too strong. My keyboard shortcut does indeed open another tab on the same JavaScript file, but rather unhelpfully it does not render the contents; it is just an empty white window! You may have better luck.

use Integer.toString(tmpInt).trim();

Yes, you absolutely can do this. For example:

public class PersonComparator implements Comparator<Person>
{
    public int compare(Person p1, Person p2)
    {
        // Assume no nulls, and simple ordinal comparisons

        // First by campus - stop if this gives a result.
        int campusResult = p1.getCampus().compareTo(p2.getCampus());
        if (campusResult != 0)
        {
            return campusResult;
        }

        // Next by faculty
        int facultyResult = p1.getFaculty().compareTo(p2.getFaculty());
        if (facultyResult != 0)
        {
            return facultyResult;
        }

        // Finally by building
        return p1.getBuilding().compareTo(p2.getBuilding());
    }
}

Basically you're saying, "If I can tell which one comes first just by looking at the campus (before they come from different campuses, and the campus is the most important field) then I'll just return that result. Otherwise, I'll continue on to compare faculties. Again, stop if that's enough to tell them apart. Otherwise, (if the campus and faculty are the same for both people) just use the result of comparing them by building."

Encapsulation means that the the state of an object only happens through a defined interface, and because of this the class can make sure that this state is always valid and in keeping with the purpose of the class.

In some cases therefore, it's perfectly in keeping with the principle of encapsulation to just expose a field publicly - all possible values for the field are valid with all other possible values of all other fields, and therefore the programmer can actively decide to allow the field to be manipulated freely by outside code.

These cases are though mostly restricted to classes that are mostly "plain old data". They also aren't very interesting in this regard, so enough about them.

In other cases, in other languages, one would have a getter and setter method, something like int getId() to obtain a value and void setId(int val) to update it.

Properties let us use the same syntax for reading and writing through such methods as we would use to read and write a field. This is a good syntactic sugar, though not vital.

(Actually, due to the way that reflection works and cases such as DataBinder.Eval it can be handy to have a property even when a field would work fine, but that's another matter).

Up until private setters being introduced (actually, what changed with C# 2 is the syntax for having a private setter and a public or protected getter in the same block), we could have a private method to do the work of the private setter, so private setters aren't really necessary. They're handy though, so while just syntactic sugar, they're pretty useful.

Encapsulation is a matter not of whether your setters (or getters) are public, private, protected or internal, but a matter of whether they are appropriate. Start with a default of every field being private (and for that matter readonly) and then as necessary add members (whether properties or methods) that alter those fields, and ensure that the object remains valid as they change. This ensures that a class' invariant is kept, which means the rules describing the valid set of states it can be in are never broken (constructors also help by making sure it starts in such a valid state).

As for your last question, to be immutable means that a class has no public, protected or internal setters and no public, protected or internal methods that change any fields. There are degrees of this, in C# there are three degrees possible:

1. All of a class' instance field's are readonly, hence even private code can't alter it. It is guaranteed to be immutable (anything that tries to change it won't compile) and possibly optimisations can be done on the back of this.

2. A class is immutable from the outside because no public member changes anything, but not guaranteed by use of readonly to not be changed from the inside.

3. A class is immutable as seen from the outside, though some state is change as an implementation detail. E.g. a field could be memoised, and hence while from the outside an attempt to get it just retrieves the same value, the first such attempt actually calculates it and then stores it for retrieval on subsequent attempts.

Use git push origin master instead.

You have a repository locally and the initial git push is "pushing" to it. It's not necessary to do so (as it is local) and it shows everything as up-to-date. git push origin master specifies a a remote repository (origin) and the branch located there (master).

For more information, check out this resource.

Try this:

mail_accounts[0].encode("ascii")

Your problem..... I think is that your for loop is encompassing all of the if, else if stuff - which acts like one statement, like hoang nguyen pointed out.

Change to this. Note the brackets that denote the code block on which the for loop operates and the change of the first else if to if.

switch(value){

    case 1:
        for(int i=0; i<something_in_the_array.length;i++) {
            if(whatever_value==(something_in_the_array[i])) {
                value=2;
                break;
             }
        }

        if(whatever_value==2) {
            value=3;
            break;
        }
        else if(whatever_value==3) {
            value=4;
            break;
        }
        break;


    case 2:

code continues....

You can try to use as well this functions to capture StdErr StdOut and return code.

def runShell(String command){
    def responseCode = sh returnStatus: true, script: "${command} &> tmp.txt" 
    def output =  readFile(file: "tmp.txt")

    if (responseCode != 0){
      println "[ERROR] ${output}"
      throw new Exception("${output}")
    }else{
      return "${output}"
    }
}

Notice:

&>name means 1>name 2>name -- redirect stdout and stderr to the file name

For me, I had to change a line of code in my local_env.yml to get the rspec tests to run.

I had originally had:

REDIS_HOST: 'redis'

and changed it to:

REDIS_HOST: 'localhost'

and the test ran fine.

Please don't do that... little Unicode BABY ANGELs like this one are dying! ??? (? these are not images) (nor is the arrow!)

?

And you are killing 20 years of DOS :-) (the last smiley is called WHITE SMILING FACE... Now it's at 263A... But in ancient times it was ALT-1)

and his friend

?

BLACK SMILING FACE... Now it's at 263B... But in ancient times it was ALT-2

Try a negative match:

Pattern regex = Pattern.compile("[^A-Za-z0-9]");

(this will ok only A-Z "standard" letters and "standard" 0-9 digits.)

I had the same issue:

The System.Web.Optimization version I was using was outdated for MVC4 RC.

I updated my packages using the package manager in VS 2010.

In this MSDN blog, Mr. Andy talks about how to update your MVC 4 Beta project to MVC 4 RC. Updating my packages got the Scripts (particularly the web optimization one) to resolve for me:

To install the latest System.Web.Optimization package, use Package Manager Console (Tools -> Library Package Manager -> Package Manager Console) and run the below command:

Install-Package -IncludePrerelease Microsoft.AspNet.Web.Optimization

Use the System.Web.Optimization file included in the package in your references.

To update other packages: Tools menu -> Library Package Manager -> Manage NuGet Packages for Solution.

Or, you can ignore the error:

declare
    column_exists exception;
    pragma exception_init (column_exists , -01430);
begin
    execute immediate 'ALTER TABLE db.tablename ADD columnname NVARCHAR2(30)';
    exception when column_exists then null;
end;
/

var json=[{"id":"431","code":"0.85.PSFR01215","price":"2457.77","volume":"23.0","total":"565.29"},{"id":"430","code":"0.85.PSFR00608","price":"1752.45","volume":"4.0","total":"70.1"},{"id":"429","code":"0.84.SMAB00060","price":"4147.5","volume":"2.0","total":"82.95"},{"id":"428","code":"0.84.SMAB00050","price":"4077.5","volume":"3.0","total":"122.32"}] 
var obj = JSON.parse(json);
var length = Object.keys(obj).length; //you get length json result 4

You can do the following:

String str = "abcd";
char arr[] = new char[len]; // len is the length of the array
arr = str.toCharArray();

There's no exact answer to this.

Generally speaking, composer shouldn't be doing what the build system is meant to be doing and you shouldn't be putting composer.lock in VCS. Composer might strangely have it backwards. End users rather than produces shouldn't be using lock files. Usually your build system keeps snapshots, reusable dirs, etc rather than an empty dir each time. People checkout out a lib from composer might want that lib to use a lock so that the dependencies that lib loads have been tested against.

On the other hand that significantly increases the burden of version management, where you'd almost certainly want multiple versions of every library as dependencies will be strictly locked. If every library is likely to have a slightly different version then you need some multiple library version support and you can also quickly see the size of dependencies needed flair out, hence the advise to keep it on the leaf.

Taking that on board, I really don't find lock files to be useful either libraries or your own workdirs. It's only use for me is in my build/testing platform which persists any externally acquired assets only updating them when requested, providing repeatable builds for testing, build and deploy. While that can be kept in VCS it's not always kept with the source tree, the build trees will either be elsewhere in the VCS structure or managed by another system somewhere else. If it's stored in a VCS it's debatable whether or not to keep it in the same repo as source trees because otherwise every pull can bring in a mass of build assets. I quite like having things all in a well arranged repo with the exception of production/sensitive credentials and bloat.

SVN can do it better than git as it doesn't force you to acquire the entire repo (though I suspect that's not actually strictly needed for git either but support for that is limited and it's not commonly used). Simple build repos are usually just an overlay branch you merge/export the build tree into. Some people combine exernal resources in their source tree or separate further, external, build and source trees. It usually serves two purposes, build caching and repeatable builds but sometimes keeping it separate on at least some level also permits fresh/blank builds and multiple builds easily.

There are a number of strategies for this and none of them particularly work well with persisting the sources list unless you're keeping external source in your source tree.

They also have things like hashes in of the file, how do that merge when two people update packages? That alone should make you think maybe this is misconstrued.

The arguments people are putting forward for lock files are cases where they've taken a very specific and restrictive view of the problem. Want repeatable builds and consistent builds? Include the vendor folder in VCS. Then you also speed up fetching assets as well as not having to depend on potentially broken external resources during build. None of the build and deploy pipelines I create require external access unless absolutely necessary. If you do have to update an external resource it's once and only once. What composer is trying to achieve makes sense for a distributed system except as mentioned before it makes no sense because it would end up with library dependency hell for library updates with common clashes and updates being as slow as the slowest to update package.

Additionally I update ferociously. Every time I develop I update and test everything. There's a very very tiny window for significant version drift to sneak in. Realistically as well, when semantic versioning is upheld, which is tends to be for composer, you're not suppose to have that many compatibility issues or breakages.

In composer.json you put the packages you require and their versions. You can lock the versions there. However those packages also have dependencies with dynamic versions that wont be locked by composer.json (though I don't see why your couldn't also put them there yourself if you do want them to be version locked) so someone else running composer install gets something different without the lock. You might not care a great deal about that or you might care, it depends. Should you care? Probably at least a little, enough to ensure you're aware of it in any situation and potential impact, but it might not be a problem either if you always have the time to just DRY run first and fix anything that got updated.

The hassle composer is trying to avoid sometimes just isn't there and the hassle having composer lock files can make is significant. They have absolutely no right to tell users what they should or shouldn't do regarding build versus source assets (whether to join of separate in VCS) as that's none of their business, they're not the boss of you or me. "Composer says" isn't an authority, they're not your superior officer nor do they give anyone any superiority on this subject. Only you know your real situation and what's best for that. However, they might advise a default course of action for users that don't understand how things work in which case you might want to follow that but personally I don't think that's a real substitute for knowing how things work and being able to properly workout your requirements. Ultimately, their answer to that question is a best guess. The people who make composer do not know where you should keep your composer.lock nor should they. Their only responsibility is to tell you what it is and what it does. Outside of that you need to decide what's best for you.

Keeping the lock file in is problematic for usability because composer is very secretive about whether it uses lock or JSON and doesn't always to well to use both together. If you run install it only uses the lock file it would appear so if you add something to composer.json then it wont be installed because it's not in your lock. It's not intuitive at all what operations really do and what they're doing in regards to the json/lock file and sometimes don't appear to even make sense (help says install takes a package name but on trying to use it it says no).

To update the lock or basically apply changes from the json you have to use update and you might not want to update everything. The lock takes precedence for choosing what should be installed. If there's a lock file, it's what's used. You can restrict update somewhat but the system is still just a mess.

Updating takes an age, gigs of RAM. I suspect as well if you pick up a project that's not been touched for a while that it looked from the versions it has up, which there will be more of over time and it probably doesn't do that efficiently which just strangles it.

They're very very sneaky when it comes to having secret composite commands you couldn't expect to be composite. By default the composer remove command appears to maps to composer update and composer remove for example.

The question you really need to be asking is not if you should keep the lock in your source tree or alternatively whether you should persist it somewhere in some fashion or not but rather you should be asking what it actually does, then you can decide for yourself when you need to persist it and where.

I will point out that having the ability to have the lock is a great convenience when you have a robust external dependency persistence strategy as it keeps track of you the information useful for tracking that (the origins) and updating it but if you don't then it's neither here not there. It's not useful when it's forced down your throat as a mandatory option to have it polluting your source trees. It's a very common thing to find in legacy codebases where people have made lots of changes to composer.json which haven't really been applied and are broken when people try to use composer. No composer.lock, no desync problem.

[Late to the party...]

Another way to do this without the overhead of an Ajax call or WebService handler is to load a special ASPX page after a given amount of time (i.e., prior to the session state time-out, which is typically 20 minutes):

// Client-side JavaScript
function pingServer() {
    // Force the loading of a keep-alive ASPX page
    var img = new Image(1, 1);
    img.src = '/KeepAlive.aspx';
}

The KeepAlive.aspx page is simply an empty page which does nothing but touch/refresh the Session state:

// KeepAlive.aspx.cs
public partial class KeepSessionAlive: System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        // Refresh the current user session
        Session["refreshTime"] = DateTime.UtcNow;
    }
}

This works by creating an img (image) element and forcing the browser to load its contents from the KeepAlive.aspx page. Loading that page causes the server to touch (update) the Session object, extending the session's expiration sliding time window (typically by another 20 minutes). The actual web page contents are discarded by the browser.

An alternative, and perhaps cleaner, way to do this is to create a new iframe element and load the KeepAlive.aspx page into it. The iframe element is hidden, such as by making it a child element of a hidden div element somewhere on the page.

Activity on the page itself can be detected by intercepting mouse and keyboard actions for the entire page body:

// Called when activity is detected
function activityDetected(evt) {
    ...
}

// Watch for mouse or keyboard activity
function watchForActivity() {
    var opts = { passive: true };
    document.body.addEventListener('mousemove', activityDetected, opts);
    document.body.addEventListener('keydown', activityDetected, opts);
}

I cannot take credit for this idea; see: https://www.codeproject.com/Articles/227382/Alert-Session-Time-out-in-ASP-Net.

firstly use

show create table table_name;

to see the descriptive structure of your table.

There you may see constraints respective to foreign keys you used in that table. First delete the respective constraint with

alter table table_name drop constraint constraint_name;

and then delete the respective foreign keys or column you wanted...GoodLuck!!

This should do the trick:

SELECT 
    title,
    description,    
    ROUND (   
        (
            LENGTH(description)
            - LENGTH( REPLACE ( description, "value", "") ) 
        ) / LENGTH("value")        
    ) AS count    
FROM <table> 

"%f" is the (or at least one) correct format for a double. There is no format for a float, because if you attempt to pass a float to printf, it'll be promoted to double before printf receives it¹. "%lf" is also acceptable under the current standard -- the l is specified as having no effect if followed by the f conversion specifier (among others).

Note that this is one place that printf format strings differ substantially from scanf (and fscanf, etc.) format strings. For output, you're passing a value, which will be promoted from float to double when passed as a variadic parameter. For input you're passing a pointer, which is not promoted, so you have to tell scanf whether you want to read a float or a double, so for scanf, %f means you want to read a float and %lf means you want to read a double (and, for what it's worth, for a long double, you use %Lf for either printf or scanf).

_{1. C99, §6.5.2.2/6: "If the expression that denotes the called function has a type that does not include a prototype, the integer promotions are performed on each argument, and arguments that have type float are promoted to double. These are called the default argument promotions." In C++ the wording is somewhat different (e.g., it doesn't use the word "prototype") but the effect is the same: all the variadic parameters undergo default promotions before they're received by the function.}

You might try searching the internet for ".htaccess Options not allowed here".

A suggestion I found (using google) is:

Check to make sure that your httpd.conf file has AllowOverride All.

A .htaccess file that works for me on Mint Linux (placed in the Laravel /public folder):

# Apache configuration file
# http://httpd.apache.org/docs/2.2/mod/quickreference.html

# Turning on the rewrite engine is necessary for the following rules and
# features. "+FollowSymLinks" must be enabled for this to work symbolically.

<IfModule mod_rewrite.c>
    Options +FollowSymLinks
    RewriteEngine On
</IfModule>

# For all files not found in the file system, reroute the request to the
# "index.php" front controller, keeping the query string intact

<IfModule mod_rewrite.c>
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^(.*)$ index.php/$1 [L]
</IfModule>

Hope this helps you. Otherwise you could ask a question on the Laravel forum (http://forums.laravel.com/), there are some really helpful people hanging around there.

As already stated, screen -S SESSIONTITLE works for starting a session with a title (SESSIONTITLE), but if you start a session and later decide to change its title. This can be accomplished by using the default key bindings:

Ctrl+a, A

Which prompts:

Set windows title to:SESSIONTITLE

Change SESSIONTITLE by backspacing and typing in the desired title. To confirm the name change and list all titles.

Ctrl+a, "

I like Brian R. Bondy's answer. I just wanted to add that Wikipedia provides a clear description of REST. The article distinguishes it from SOAP.

REST is an exchange of state information, done as simply as possible.

SOAP is a message protocol that uses XML.

One of the main reasons that many people have moved from SOAP to REST is that the WS-* (called WS splat) standards associated with SOAP based web services are EXTREMELY complicated. See wikipedia for a list of the specifications. Each of these specifications is very complicated.

EDIT: for some reason the links are not displaying correctly. REST = http://en.wikipedia.org/wiki/REST

WS-* = http://en.wikipedia.org/wiki/WS-*

If you want to display the menu up, just add the class "dropup"
and remove the class "dropdown" if exists from the same div.

<div class="btn-group dropup">

The POSIX specification for find says:

-mtimen The primary shall evaluate as true if the file modification time subtracted from the initialization time, divided by 86400 (with any remainder discarded), is n.

Interestingly, the description of find does not further specify 'initialization time'. It is probably, though, the time when find is initialized (run).

In the descriptions, wherever n is used as a primary argument, it shall be interpreted as a decimal integer optionally preceded by a plus ( '+' ) or minus-sign ( '-' ) sign, as follows:

+n More than n.
  n Exactly n.
-n Less than n.

At the given time (2014-09-01 00:53:44 -4:00, where I'm deducing that AST is Atlantic Standard Time, and therefore the time zone offset from UTC is -4:00 in ISO 8601 but +4:00 in ISO 9945 (POSIX), but it doesn't matter all that much):

1409547224 = 2014-09-01 00:53:44 -04:00
1409457540 = 2014-08-30 23:59:00 -04:00

so:

1409547224 - 1409457540 = 89684
89684 / 86400 = 1

Even if the 'seconds since the epoch' values are wrong, the relative values are correct (for some time zone somewhere in the world, they are correct).

The n value calculated for the 2014-08-30 log file therefore is exactly 1 (the calculation is done with integer arithmetic), and the +1 rejects it because it is strictly a > 1 comparison (and not >= 1).

In Python2, input is evaluated, input() is equivalent to eval(raw_input()). When you enter klj, Python tries to evaluate that name and raises an error because that name is not defined.

Use raw_input to get a string from the user in Python2.

Demo 1: klj is not defined:

>>> input()
klj
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<string>", line 1, in <module>
NameError: name 'klj' is not defined

Demo 2: klj is defined:

>>> klj = 'hi'
>>> input()
klj
'hi'

Demo 3: getting a string with raw_input:

>>> raw_input()
klj
'klj'

nope, none of this will work. What you need is this!!!

Try this:

if (screen.width <= 960) {
  alert('Less than 960');
} else if (screen.width >960) {
  alert('More than 960');
}

Use DATESTR

>> datestr(40189)
ans =
12-Jan-0110

Unfortunately, Excel starts counting at 1-Jan-1900. Find out how to convert serial dates from Matlab to Excel by using DATENUM

>> datenum(2010,1,11)
ans =
      734149
>> datenum(2010,1,11)-40189
ans =
      693960
>> datestr(40189+693960)
ans =
11-Jan-2010

In other words, to convert any serial Excel date, call

datestr(excelSerialDate + 693960)

EDIT

To get the date in mm/dd/yyyy format, call datestr with the specified format

excelSerialDate = 40189;
datestr(excelSerialDate + 693960,'mm/dd/yyyy')
ans =
01/11/2010

Also, if you want to get rid of the leading zero for the month, you can use REGEXPREP to fix things

excelSerialDate = 40189;
regexprep(datestr(excelSerialDate + 693960,'mm/dd/yyyy'),'^0','')
ans =
1/11/2010

One approach is to combine the search strings into a regex pattern as in this answer.

What I've done to solve this problem is save the workbook. This forces it to refresh before closing.

The same approach works for copying many formulas before performing the next operation.

An HTML element like div can have more than one classes. Let say div is assigned two styles using addClass method. If style1 has 3 properties like font-size, weight and color, and style2 has 4 properties like font-size, weight, color and background-color, the resultant effective properties set (style), i think, will have 4 properties i.e. union of all style sets. Common properties, in our case, color,font-size, weight, will have one occuerance with latest values. If div is assigned style1 first and style2 second, the common prpoerties will be overwritten by style2 values.

Further, I have written a post at Using JQuery to Apply,Remove and Manage Styles, I hope it will help you

Regards Awais

C#

  if (condition)
    statement;
  else
    statement;

vb.net

  If [Condition] Then
    Statement
  Else
    Statement
  End If

If else examples with source code... If..else in Asp.Net

Patter

Another alternative for this (older) question:

import datetime
import pytz
import time

pacific=pytz.timezone('US/Pacific')
now=datetime.datetime.now()
# pacific.dst(now).total_seconds() yields 3600 secs. [aka 1 hour]
time.strftime("%-H", time.gmtime(pacific.dst(now).total_seconds()))
'1'

The above is a good way to tell if your current time zone is actually in daylight savings time or not. (It provides an offset of 0 or 1.) Anyway, the real work is being done by time.strftime("%H:%M:%S", time.gmtime(36901)) which does work on the output of gmtime().

>>> time.strftime("%H:%M:%S",time.gmtime(36901))  # secs = 36901
'10:15:01'

And, that's it! (NOTE: Here's a link to format specifiers for time.strftime(). ...)

Another technique to consider if you want to compare a file to the last commit which is more pedantic:

git diff master myfile.txt

The advantage with this technique is you can also compare to the penultimate commit with:

git diff master^ myfile.txt

and the one before that:

git diff master^^ myfile.txt

Also you can substitute '~' for the caret '^' character and 'you branch name' for 'master' if you are not on the master branch.

This means that you must declare strict mode by writing "use strict" at the beginning of the file or the function to use block-scope declarations.

EX:

function test(){
    "use strict";
    let a = 1;
} 

For the record, the spring.jpa.hibernate.ddl-auto property is Spring Data JPA specific and is their way to specify a value that will eventually be passed to Hibernate under the property it knows, hibernate.hbm2ddl.auto.

The values create, create-drop, validate, and update basically influence how the schema tool management will manipulate the database schema at startup.

For example, the update operation will query the JDBC driver's API to get the database metadata and then Hibernate compares the object model it creates based on reading your annotated classes or HBM XML mappings and will attempt to adjust the schema on-the-fly.

The update operation for example will attempt to add new columns, constraints, etc but will never remove a column or constraint that may have existed previously but no longer does as part of the object model from a prior run.

Typically in test case scenarios, you'll likely use create-drop so that you create your schema, your test case adds some mock data, you run your tests, and then during the test case cleanup, the schema objects are dropped, leaving an empty database.

In development, it's often common to see developers use update to automatically modify the schema to add new additions upon restart. But again understand, this does not remove a column or constraint that may exist from previous executions that is no longer necessary.

In production, it's often highly recommended you use none or simply don't specify this property. That is because it's common practice for DBAs to review migration scripts for database changes, particularly if your database is shared across multiple services and applications.

In C++, you can use a such function:

template <typename T>
T to(const std::string & s)
{
    std::istringstream stm(s);
    T result;
    stm >> result;

    if(stm.tellg() != s.size())
        throw error;

    return result;
}

This can help you to convert any string to any type such as float, int, double...

I've had MUCH better luck using ShellExecuteA(). I've heard that there are a lot of security risks when you use "system()". This is what I came up with for my own code.

void SearchWeb( string word )
{    
    string base_URL = "http://www.bing.com/search?q=";
    string search_URL = "dummy";
    search_URL = base_URL + word;

    cout << "Searching for: \"" << word << "\"\n";

    ShellExecuteA(NULL, "open", search_URL.c_str(), NULL, NULL, SW_SHOWNORMAL);
}

p.s. Its using WinAPI if i'm correct. So its not multiplatform solution.

This would be the command line statement.

"%JMETER_HOME%\bin\jmeter.bat" -n -t <jmx test file path> -l <csv result file path> -Djmeter.save.saveservice.output_format=csv

Here is what you do in Excel 2003:

1. In your sheet of interest, go to Format -> Sheet -> Hide and hide your sheet.
2. Go to Tools -> Protection -> Protect Workbook, make sure Structure is selected, and enter your password of choice.

Here is what you do in Excel 2007:

1. In your sheet of interest, go to Home ribbon -> Format -> Hide & Unhide -> Hide Sheet and hide your sheet.
2. Go to Review ribbon -> Protect Workbook, make sure Structure is selected, and enter your password of choice.

Once this is done, the sheet is hidden and cannot be unhidden without the password. Make sense?

If you really need to keep some calculations secret, try this: use Access (or another Excel workbook or some other DB of your choice) to calculate what you need calculated, and export only the "unclassified" results to your Excel workbook.

I deleted all my onedrive keys, installed latest preview etc and finally realized that the icons were working all along for some explorer directory views and not others.

In other words, medium, large, extra large, and tiles, but not list or detail. Since I don't want to learn all about how that works, I am just viewing my work directories as tiles for now.

A couple of contributions suggested that arrays in python are represented by lists. This is incorrect. Python has an independent implementation of array() in the standard library module array "array.array()" hence it is incorrect to confuse the two. Lists are lists in python so be careful with the nomenclature used.

list_01 = [4, 6.2, 7-2j, 'flo', 'cro']

list_01
Out[85]: [4, 6.2, (7-2j), 'flo', 'cro']

There is one very important difference between list and array.array(). While both of these objects are ordered sequences, array.array() is an ordered homogeneous sequences whereas a list is a non-homogeneous sequence.

Problem was solved by simply:

1. Deleting the node_modules folder
2. Running npm install to get all packages with correct versions

In my case, the problem occurred after changing Git branches, where a new branch was using a different set of node modules. The old branch was using TypeScript v1.8, the new one v2.0

Recursion is nothing but the process of calling of one function from the other only this process is done by calling of a function by itself. As we know when one function calls the other function the first function saves its state(its variables) and then passes the control to the called function. The called function can be called by using the same name of variables ex fun1(a) can call fun2(a). When we do recursive call nothing new happens. One function calls itself by passing the same type and similar in name variables(but obviously the values stored in variables are different,only the name remains same.)to itself. But before every call the function saves its state and this process of saving continues. The SAVING IS DONE ON A STACK.

NOW THE STACK COMES INTO PLAY.

So if you write an iterative program and save the state on a stack each time and then pop out the values from stack when needed, you have successfully converted a recursive program into an iterative one!

The proof is simple and analytical.

In recursion the computer maintains a stack and in iterative version you will have to manually maintain the stack.

Think over it, just convert a depth first search(on graphs) recursive program into a dfs iterative program.

All the best!

With Java 8 Optional:

for (Object object : Optional.ofNullable(someList).orElse(Collections.emptyList())) {
    // do whatever
}

I found three ways to solve the problem.

Unique indexes in EntityFramework Core:

First approach:

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
   modelBuilder.Entity<Entity>()
   .HasIndex(p => new {p.FirstColumn , p.SecondColumn}).IsUnique();
}

The second approach to create Unique Constraints with EF Core by using Alternate Keys.

Examples

One column:

modelBuilder.Entity<Blog>().HasAlternateKey(c => c.SecondColumn).HasName("IX_SingeColumn");

Multiple columns:

modelBuilder.Entity<Entity>().HasAlternateKey(c => new [] {c.FirstColumn, c.SecondColumn}).HasName("IX_MultipleColumns");

EF 6 and below:

First approach:

dbContext.Database.ExecuteSqlCommand(string.Format(
                        @"CREATE UNIQUE INDEX LX_{0} ON {0} ({1})", 
                                 "Entitys", "FirstColumn, SecondColumn"));

This approach is very fast and useful but the main problem is that Entity Framework doesn't know anything about those changes!

Second approach:
I found it in this post but I did not tried by myself.

CreateIndex("Entitys", new string[2] { "FirstColumn", "SecondColumn" },
              true, "IX_Entitys");

The problem of this approach is the following: It needs DbMigration so what do you do if you don't have it?

Third approach:
I think this is the best one but it requires some time to do it. I will just show you the idea behind it: In this link http://code.msdn.microsoft.com/CSASPNETUniqueConstraintInE-d357224a you can find the code for unique key data annotation:

[UniqueKey] // Unique Key 
public int FirstColumn  { get; set;}
[UniqueKey] // Unique Key 
public int SecondColumn  { get; set;}

// The problem hier
1, 1  = OK 
1 ,2  = NO OK 1 IS UNIQUE

The problem for this approach; How can I combine them? I have an idea to extend this Microsoft implementation for example:

[UniqueKey, 1] // Unique Key 
public int FirstColumn  { get; set;}
[UniqueKey ,1] // Unique Key 
public int SecondColumn  { get; set;}

Later in the IDatabaseInitializer as described in the Microsoft example you can combine the keys according to the given integer. One thing has to be noted though: If the unique property is of type string then you have to set the MaxLength.

OK the main difference between class methods and static methods is:

• class method has its own identity, that's why they have to be called from within an INSTANCE.
• on the other hand static method can be shared between multiple instances so that it must be called from within THE CLASS

This is a simple example of JSON parsing by taking example of google map API. This will return City name of given zip code.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Newtonsoft.Json;
using System.Net;

namespace WebApplication1
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        WebClient client = new WebClient();
        string jsonstring;
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            jsonstring = client.DownloadString("http://maps.googleapis.com/maps/api/geocode/json?address="+txtzip.Text.Trim());
            dynamic dynObj = JsonConvert.DeserializeObject(jsonstring);

            Response.Write(dynObj.results[0].address_components[1].long_name);
        }
    }
}

X milliseconds = X / 1000 seconds = (X / 1000) / 60 minutes

If you have 100,000 milliseconds, divide this value by 1,000 and you're left with 100 seconds. Now 100 / 60 = 1.666~ minutes, but fractional minutes have no value, so: do 100 % 60 = 40 seconds to find the remainder, then integer division 100 / 60 = 1 minute, with 40 seconds remainder. Answer: 1 minute, 40 seconds.

Someone linked me this: What is the best way to move an element that's on the top to the bottom in Responsive design.

The solution in that worked perfectly. Though it doesn’t support old IE, that doesn’t matter for me, since I’m using responsive design for mobile. And it works for most mobile browsers.

Basically, I had this:

@media (max-width: 30em) {
  .container {
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    -webkit-box-orient: vertical;
    -moz-box-orient: vertical;
    -webkit-flex-direction: column;
    -ms-flex-direction: column;
    flex-direction: column;
    /* optional */
    -webkit-box-align: start;
    -moz-box-align: start;
    -ms-flex-align: start;
    -webkit-align-items: flex-start;
    align-items: flex-start;
  }

  .container .first_div {
    -webkit-box-ordinal-group: 2;
    -moz-box-ordinal-group: 2;
    -ms-flex-order: 2;
    -webkit-order: 2;
    order: 2;
  }

  .container .second_div {
    -webkit-box-ordinal-group: 1;
    -moz-box-ordinal-group: 1;
    -ms-flex-order: 1;
    -webkit-order: 1;
    order: 1;
  }
}

This worked better than floats for me, because I needed them stacked on top of each other and I had about five different divs that I had to swap around the position of.

I think every process you make start executing the line you create so something like this...

pid=fork() at line 6. fork function returns 2 values 
you have 2 pids, first pid=0 for child and pid>0 for parent 
so you can use if to separate

.

/*
    sleep(int time) to see clearly
    <0 fail 
    =0 child
    >0 parent
*/
int main(int argc, char** argv) {
    pid_t childpid1, childpid2;
    printf("pid = process identification\n");
    printf("ppid = parent process identification\n");
    childpid1 = fork();
    if (childpid1 == -1) {
        printf("Fork error !\n");
    }
    if (childpid1 == 0) {
        sleep(1);
        printf("child[1] --> pid = %d and  ppid = %d\n",
                getpid(), getppid());
    } else {
        childpid2 = fork();
        if (childpid2 == 0) {
            sleep(2);
            printf("child[2] --> pid = %d and ppid = %d\n",
                    getpid(), getppid());
        } else {
            sleep(3);
            printf("parent --> pid = %d\n", getpid());
        }
    }
    return 0;
}

//pid = process identification
//ppid = parent process identification
//child[1] --> pid = 2399 and  ppid = 2398
//child[2] --> pid = 2400 and ppid = 2398
//parent --> pid = 2398

linux.die.net

some uni stuff

I got this error on my mac because it ran the apache server by default using the same port as the one used by the node server which in my case was the port 80. All I had to do is stop it with sudo apachectl stop

Hope this helps someone.

Valid regex tokens vary by implementation. A generic form is:

[0-9]+(\.[0-9][0-9]?)?

More compact:

\d+(\.\d{1,2})?

Both assume that both have at least one digit before and one after the decimal place.

To require that the whole string is a number of this form, wrap the expression in start and end tags such as (in Perl's form):

^\d+(\.\d{1,2})?$

To match numbers without a leading digit before the decimal (.12) and whole numbers having a trailing period (12.) while excluding input of a single period (.), try the following:

^(\d+(\.\d{0,2})?|\.?\d{1,2})$

Added

Wrapped the fractional portion in ()? to make it optional. Be aware that this excludes forms such as 12. Including that would be more like ^\d+\\.?\d{0,2}$.

Added

Use ^\d{1,6}(\.\d{1,2})?$ to stop repetition and give a restriction to whole part of the decimal value.

I think I have come up with a quite shorter solution.. Hope it helps someone.

cbind.na<-function(df1, df2){

  #Collect all unique rownames
  total.rownames<-union(x = rownames(x = df1),y = rownames(x=df2))

  #Create a new dataframe with rownames
  df<-data.frame(row.names = total.rownames)

  #Get absent rownames for both of the dataframe
  absent.names.1<-setdiff(x = rownames(df1),y = rownames(df))
  absent.names.2<-setdiff(x = rownames(df2),y = rownames(df))

  #Fill absents with NAs
  df1.fixed<-data.frame(row.names = absent.names.1,matrix(data = NA,nrow = length(absent.names.1),ncol=ncol(df1)))
  colnames(df1.fixed)<-colnames(df1)
  df1<-rbind(df1,df1.fixed)

  df2.fixed<-data.frame(row.names = absent.names.2,matrix(data = NA,nrow = length(absent.names.2),ncol=ncol(df2)))
  colnames(df2.fixed)<-colnames(df2)
  df2<-rbind(df2,df2.fixed)

  #Finally cbind into new dataframe
  df<-cbind(df,df1[rownames(df),],df2[rownames(df),])
  return(df)

}

Add this line

AddHandler application/x-httpd-php .html

to httpd.conf file for what you want to do. But remember, if you do this then your web server will be very slow, because it will be parsing even static code which will not contain php code. So the better way will be to make the file extension .phtml instead of just .html.

Here's a nice fun LINQ example.

public static byte[] StringToByteArray(string hex) {
    return Enumerable.Range(0, hex.Length)
                     .Where(x => x % 2 == 0)
                     .Select(x => Convert.ToByte(hex.Substring(x, 2), 16))
                     .ToArray();
}

You can also try this

string.Join(null,System.Text.RegularExpressions.Regex.Split(expr, "[^\\d]"));

I prefer an answer from Best way to print the result of a bool as 'false' or 'true' in c?, just like

printf("%s\n", "false\0true"+6*x);

• x == 0, "false\0true"+ 0" it means "false";
• x == 1, "false\0true"+ 6" it means "true";

Self-explanatory code follows which first creates a std::tm corresponding to 10-10-2012 12:38:40, converts that to a std::chrono::system_clock::time_point, adds 0.123456 seconds, and then prints that out by converting back to a std::tm. How to handle the fractional seconds is in the very last step.

#include <iostream>
#include <chrono>
#include <ctime>

int main()
{
    // Create 10-10-2012 12:38:40 UTC as a std::tm
    std::tm tm = {0};
    tm.tm_sec = 40;
    tm.tm_min = 38;
    tm.tm_hour = 12;
    tm.tm_mday = 10;
    tm.tm_mon = 9;
    tm.tm_year = 112;
    tm.tm_isdst = -1;
    // Convert std::tm to std::time_t (popular extension)
    std::time_t tt = timegm(&tm);
    // Convert std::time_t to std::chrono::system_clock::time_point
    std::chrono::system_clock::time_point tp = 
                                     std::chrono::system_clock::from_time_t(tt);
    // Add 0.123456 seconds
    // This will not compile if std::chrono::system_clock::time_point has
    //   courser resolution than microseconds
    tp += std::chrono::microseconds(123456);
    
    // Now output tp

    // Convert std::chrono::system_clock::time_point to std::time_t
    tt = std::chrono::system_clock::to_time_t(tp);
    // Convert std::time_t to std::tm (popular extension)
    tm = std::tm{0};
    gmtime_r(&tt, &tm);
    // Output month
    std::cout << tm.tm_mon + 1 << '-';
    // Output day
    std::cout << tm.tm_mday << '-';
    // Output year
    std::cout << tm.tm_year+1900 << ' ';
    // Output hour
    if (tm.tm_hour <= 9)
        std::cout << '0';
    std::cout << tm.tm_hour << ':';
    // Output minute
    if (tm.tm_min <= 9)
        std::cout << '0';
    std::cout << tm.tm_min << ':';
    // Output seconds with fraction
    //   This is the heart of the question/answer.
    //   First create a double-based second
    std::chrono::duration<double> sec = tp - 
                                    std::chrono::system_clock::from_time_t(tt) +
                                    std::chrono::seconds(tm.tm_sec);
    //   Then print out that double using whatever format you prefer.
    if (sec.count() < 10)
        std::cout << '0';
    std::cout << std::fixed << sec.count() << '\n';
}

For me this outputs:

10-10-2012 12:38:40.123456

Your std::chrono::system_clock::time_point may or may not be precise enough to hold microseconds.

Update

An easier way is to just use this date library. The code simplifies down to (using C++14 duration literals):

#include "date.h"
#include <iostream>
#include <type_traits>

int
main()
{
    using namespace date;
    using namespace std::chrono;
    auto t = sys_days{10_d/10/2012} + 12h + 38min + 40s + 123456us;
    static_assert(std::is_same<decltype(t),
                               time_point<system_clock, microseconds>>{}, "");
    std::cout << t << '\n';
}

which outputs:

2012-10-10 12:38:40.123456

You can skip the static_assert if you don't need to prove that the type of t is a std::chrono::time_point.

If the output isn't to your liking, for example you would really like dd-mm-yyyy ordering, you could:

#include "date.h"
#include <iomanip>
#include <iostream>

int
main()
{
    using namespace date;
    using namespace std::chrono;
    using namespace std;
    auto t = sys_days{10_d/10/2012} + 12h + 38min + 40s + 123456us;
    auto dp = floor<days>(t);
    auto time = make_time(t-dp);
    auto ymd = year_month_day{dp};
    cout.fill('0');
    cout << ymd.day() << '-' << setw(2) << static_cast<unsigned>(ymd.month())
         << '-' << ymd.year() << ' ' << time << '\n';
}

which gives exactly the requested output:

10-10-2012 12:38:40.123456

Update

Here is how to neatly format the current time UTC with milliseconds precision:

#include "date.h"
#include <iostream>

int
main()
{
    using namespace std::chrono;
    std::cout << date::format("%F %T\n", time_point_cast<milliseconds>(system_clock::now()));
}

which just output for me:

2016-10-17 16:36:02.975

C++17 will allow you to replace time_point_cast<milliseconds> with floor<milliseconds>. Until then date::floor is available in "date.h".

std::cout << date::format("%F %T\n", date::floor<milliseconds>(system_clock::now()));

Update C++20

In C++20 this is now simply:

#include <chrono>
#include <iostream>

int
main()
{
    using namespace std::chrono;
    auto t = sys_days{10d/10/2012} + 12h + 38min + 40s + 123456us;
    std::cout << t << '\n';
}

Or just:

std::cout << std::chrono::system_clock::now() << '\n';

std::format will be available to customize the output.

Uri myUri = Uri.parse("http://www.google.com");

Here's the doc http://developer.android.com/reference/android/net/Uri.html#parse%28java.lang.String%29

From the "Updating Chosen Dynamically" section in the docs: You need to trigger the 'chosen:updated' event on the field

$(document).ready(function() {

    $('select').chosen();

    $('button').click(function() {
        $('select').val(2);
        $('select').trigger("chosen:updated");
    });

});

NOTE: versions prior to 1.0 used the following:

$('select').trigger("liszt:updated");

You can loop through the keys:

foo = {one:1, two:2, three:3};
for (key in foo){
    console.log("foo["+ key +"]="+ foo[key]);
}

will output:

foo[one]=1
foo[two]=2
foo[three]=3

EventArgs e is a parameter called e that contains the event data, see the EventArgs MSDN page for more information.

Object Sender is a parameter called Sender that contains a reference to the control/object that raised the event.

Event Arg Class: http://msdn.microsoft.com/en-us/library/system.eventargs.aspx

Example:

protected void btn_Click (object sender, EventArgs e){
   Button btn = sender as Button;
   btn.Text = "clicked!";
}

Edit: When Button is clicked, the btn_Click event handler will be fired. The "object sender" portion will be a reference to the button which was clicked

Is this logically possible??.. I guess the approach that you must take is this way :

Str1 ="test123.00"
Str2 ="yes50.00"

This will be impossible to tackle unless you have delimiter in between test and 123.00

eg: Str1 = "test-123.00" 

Then you can split this way

Str2 = Str1.split("-"); 

This will return you an array of words split with "-"

Then you can do parseFloat(Str2[1]) to get the floating value i.e 123.00

df.groupby('A').apply(display)

gives neat formatting

I like this one.

wmic process where "name like '%java%'" delete

You can actually kill a process on a remote machine the same way.

wmic /node:computername /user:adminuser /password:password process where "name like '%java%'" delete

wmic is awesome!

The 500 code would normally indicate an error on the server, not anything with your code. Some thoughts

• Talk to the server developer for more info. You can't get more info directly.
• Verify your arguments into the call (values). Look for anything you might think could cause a problem for the server process. The process should not die and should return you a better code, but bugs happen there also.
• Could be intermittent, like if the server database goes down. May be worth trying at another time.

var button = document.getElementById("<<button-id>>");
button.addEventListener("click", function() {
  window.location.href= "<<full-servlet-path>>" (eg. http://localhost:8086/xyz/servlet)
});

On Vista with virtualization on, the file is here. Note that the AppData folder is hidden. Either show hidden folders, or go straight to it by typing %AppData% in the address bar of Windows Explorer.

C:\Users\[user]\AppData\Roaming\Notepad++\shortcuts.xml

Using Math.Round(number) rounds to the nearest whole number.

Rails 4 now uses strong parameters.

Protecting attributes is now done in the controller. This is an example:

class PeopleController < ApplicationController
  def create
    Person.create(person_params)
  end

  private

  def person_params
    params.require(:person).permit(:name, :age)
  end
end

No need to set attr_accessible in the model anymore.

Dealing with accepts_nested_attributes_for

In order to use accepts_nested_attribute_for with strong parameters, you will need to specify which nested attributes should be whitelisted.

class Person
  has_many :pets
  accepts_nested_attributes_for :pets
end

class PeopleController < ApplicationController
  def create
    Person.create(person_params)
  end

  # ...

  private

  def person_params
    params.require(:person).permit(:name, :age, pets_attributes: [:name, :category])
  end
end

Keywords are self-explanatory, but just in case, you can find more information about strong parameters in the Rails Action Controller guide.

Note: If you still want to use attr_accessible, you need to add protected_attributes to your Gemfile. Otherwise, you will be faced with a RuntimeError.

Brief answer to your question: No. You shouldn't call ConfigureAwait(false) at the application level like that.

TL;DR version of the long answer: If you are writing a library where you don't know your consumer and don't need a synchronization context (which you shouldn't in a library I believe), you should always use ConfigureAwait(false). Otherwise, the consumers of your library may face deadlocks by consuming your asynchronous methods in a blocking fashion. This depends on the situation.

Here is a bit more detailed explanation on the importance of ConfigureAwait method (a quote from my blog post):

When you are awaiting on a method with await keyword, compiler generates bunch of code in behalf of you. One of the purposes of this action is to handle synchronization with the UI (or main) thread. The key component of this feature is the SynchronizationContext.Current which gets the synchronization context for the current thread. SynchronizationContext.Current is populated depending on the environment you are in. The GetAwaiter method of Task looks up for SynchronizationContext.Current. If current synchronization context is not null, the continuation that gets passed to that awaiter will get posted back to that synchronization context.

When consuming a method, which uses the new asynchronous language features, in a blocking fashion, you will end up with a deadlock if you have an available SynchronizationContext. When you are consuming such methods in a blocking fashion (waiting on the Task with Wait method or taking the result directly from the Result property of the Task), you will block the main thread at the same time. When eventually the Task completes inside that method in the threadpool, it is going to invoke the continuation to post back to the main thread because SynchronizationContext.Current is available and captured. But there is a problem here: the UI thread is blocked and you have a deadlock!

Also, here are two great articles for you which are exactly for your question:

• The Perfect Recipe to Shoot Yourself in The Foot - Ending up with a Deadlock Using the C# 5.0 Asynchronous Language Features
• Asynchronous .NET Client Libraries for Your HTTP API and Awareness of async/await's Bad Effects

Finally, there is a great short video from Lucian Wischik exactly on this topic: Async library methods should consider using Task.ConfigureAwait(false).

Hope this helps.

The .NET framework has some built-in classes which allows you to send e-mail via your app.

You should take a look in the System.Net.Mail namespace, where you'll find the MailMessage and SmtpClient classes. You can set the BodyFormat of the MailMessage class to MailFormat.Html.

It could also be helpfull if you make use of the AlternateViews property of the MailMessage class, so that you can provide a plain-text version of your mail, so that it can be read by clients that do not support HTML.

http://msdn.microsoft.com/en-us/library/system.net.mail.mailmessage.alternateviews.aspx

One other way, using the splat operator:

*a, last = [1, 3, 4, 5]

STDOUT:
a: [1, 3, 4]
last: 5

See API for String class:

Returns a copy of the string, with leading and trailing whitespace omitted.

Whitespace on both sides is removed:

Note that trim() does not change the String instance, it will return a new object:

 String original = "  content  ";
 String withoutWhitespace = original.trim();

 // original still refers to "  content  "
 // and withoutWhitespace refers to "content"

To continue displaying data in the input after selecting, do so:

VB.NET
Private Sub ComboBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles ComboBox1.KeyPress
    e.Handled = True
End Sub



C#
Private void ComboBox1_KeyPress(object sender, KeyPressEventArgs e)
{
    e.Handled = true;
}

Well, you must first drop the auto_increment and primary key you have and then add yours, as follows:

-- drop auto_increment capability
alter table `users` modify column id INT NOT NULL;
-- in one line, drop primary key and rebuild one
alter table `users` drop primary key, add primary key(id);
-- re add the auto_increment capability, last value is remembered
alter table `users` modify column id INT NOT NULL AUTO_INCREMENT;

static bool FileInUse(string path)
    {
        try
        {
            using (FileStream fs = new FileStream(path, FileMode.OpenOrCreate))
            {
                fs.CanWrite
            }
            return false;
        }
        catch (IOException ex)
        {
            return true;
        }
    }

string filePath = "C:\\Documents And Settings\\yourfilename";
bool isFileInUse;

isFileInUse = FileInUse(filePath);

// Then you can do some checking
if (isFileInUse)
   Console.WriteLine("File is in use");
else
   Console.WriteLine("File is not in use");

Hope this helps!

Vertex *f=(findvertex(from));
if(!f) {
    cerr << "vertex not found" << endl;
    exit(1) // or return;
}

Because findVertex can return NULL if it can't find the vertex.

Otherwise this f->adj; is trying to do

NULL->adj;

Which causes access violation.

You can use the Window object and access it everwhere. example window.defaultTitle = "my title"; then you can access window.defaultTitle without importing anything.

You can build on the command line with ant. See this guide.

Then, you can install it by using adb on the command line.

adb install -r MyApp.apk

The -r flag is to replace the existing application.

Use dict.setdefault():

>>> d = {1: 'one'}
>>> d.setdefault(1, '1')
'one'
>>> d    # d has not changed because the key already existed
{1: 'one'}
>>> d.setdefault(2, 'two')
'two'
>>> d
{1: 'one', 2: 'two'}

Do npm i -g @angular/material --save to solve the problem

You may drag'n'drop your folder to Side bar. To enable Side bar you should do View -> Side bar -> show opened files. You'll got opened files (tabs) tree and folder structure at Side bar.

Make the following changes in your Registry and it should work:

1.) .NET Framework strong cryptography registry keys

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\v4.0.30319]
"SchUseStrongCrypto"=dword:00000001

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\.NETFramework\v4.0.30319]
"SchUseStrongCrypto"=dword:00000001

2.) Secure Channel (Schannel) TLS 1.2 registry keys

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2]

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Client]
"DisabledByDefault"=dword:00000000
"Enabled"=dword:00000001

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Server]
"DisabledByDefault"=dword:00000000
"Enabled"=dword:00000001

Because Python really just calls the C language strftime(3) function on your platform, it might be that there are format characters you could use to control the leading zero; try man strftime and take a look. But, of course, the result will not be portable, as the Python manual will remind you. :-)

I would try using a new-style datetime object instead, which has attributes like t.year and t.month and t.day, and put those through the normal, high-powered formatting of the % operator, which does support control of leading zeros. See http://docs.python.org/library/datetime.html for details. Better yet, use the "".format() operator if your Python has it and be even more modern; it has lots of format options for numbers as well. See: http://docs.python.org/library/string.html#string-formatting.

I created a library called pywebcapture that wraps selenium that will do just that:

pip install pywebcapture

Once you install with pip, you can do the following to easily get full size screenshots:

# import modules
from pywebcapture import loader, driver

# load csv with urls
csv_file = loader.CSVLoader("csv_file_with_urls.csv", has_header_bool, url_column, optional_filename_column)
uri_dict = csv_file.get_uri_dict()

# create instance of the driver and run
d = driver.Driver("path/to/webdriver/", output_filepath, delay, uri_dict)
d.run()

Enjoy!

https://pypi.org/project/pywebcapture/

You can do

SELECT MAX(ID) FROM Customers;

This method is a bit different, it provided me with a bit more flexibility than the previous answer. By making it into an ordered factor, you can use it nicely in arrange and such. I used reorder.factor from the gdata package.

df <- data.frame(name=letters[1:4], value=c(rep(TRUE, 2), rep(FALSE, 2)))
target <- c("b", "c", "a", "d")

require(gdata)
df$name <- reorder.factor(df$name, new.order=target)

Next, use the fact that it is now ordered:

require(dplyr)
df %>%
  arrange(name)
    name value
1    b  TRUE
2    c FALSE
3    a  TRUE
4    d FALSE

If you want to go back to the original (alphabetic) ordering, just use as.character() to get it back to the original state.

    $('select').select2("val",null);

From Xcode v4.3, it is being installed as application. The simulator is available at

/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/Applications/iOS\ Simulator.app/

// 24-hour time to 12-hour time 
$time_in_12_hour_format  = date("g:i a", strtotime("13:30"));

// 12-hour time to 24-hour time 
$time_in_24_hour_format  = date("H:i", strtotime("1:30 PM"));

You can also put DOM elements, like div on top of the canvas that would represent your canvas elements and be positioned the same way.

Now you can attach event listeners to these divs and run the necessary actions.

If you are using angular, check that the tsconfig.json does not contain errors. (in the problems terminal)

For some reason I doubled these lines, and it didn't work for me

{
  "module": "esnext",
  "moduleResolution": "node",
}

There are so many ways to do it like

Dont add and href attribute

<a name="here"> Test <a>

You can add onclick event instead of href like

<a name="here" onclick="YourFunction()"> Test <a>

Or you can add void function like this which would be the best way

<a href="javascript:void(0);"> 
<a href="javascript:;">

add this

.carousel .item img {
   left: -9999px;  /*important */
   right: -9999px;  /*important */
   margin: 0 auto;  /*important */
   max-width: none;  /*important */
   min-width: 100%;
   position: absolute;
}

And of course one of the parent divs needs to have a position:relative, but I believe it does by default.

See it here: http://paginacrestinului.ro/

jsonData = """{"from": {"id": "8", "name": "Mary Pinter"}, "message": "How ARE you?", "comments": {"count": 0}, "updated_time": "2012-05-01", "created_time": "2012-05-01", "to": {"data": [{"id": "1543", "name": "Honey Pinter"}, {"name": "Joe Schmoe"}]}, "type": "status", "id": "id_7"}"""

def getTargetIds(jsonData):
    data = json.loads(jsonData)
    for dest in data['to']['data']:
        print("to_id:", dest.get('id', 'null'))

Try it:

>>> getTargetIds(jsonData)
to_id: 1543
to_id: null

Or, if you just want to skip over values missing ids instead of printing 'null':

def getTargetIds(jsonData):
    data = json.loads(jsonData)
    for dest in data['to']['data']:
        if 'id' in to_id:
            print("to_id:", dest['id'])

So:

>>> getTargetIds(jsonData)
to_id: 1543

Of course in real life, you probably don't want to print each id, but to store them and do something with them, but that's another issue.

I am using Android Studio 3.0 and was facing the same problem. I add this to my gradle:

multiDexEnabled true

And it worked!

Example

android {
    compileSdkVersion 27
    buildToolsVersion '27.0.1'
    defaultConfig {
        applicationId "com.xx.xxx"
        minSdkVersion 15
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        multiDexEnabled true //Add this
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            shrinkResources true
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

And clean the project.

It is impossible to determine whether a variable has been declared or not other than using try..catch to cause an error if it hasn't been declared. Test like:

if (typeof varName == 'undefined') 

do not tell you if varName is a variable in scope, only that testing with typeof returned undefined. e.g.

var foo;
typeof foo == 'undefined'; // true
typeof bar == 'undefined'; // true

In the above, you can't tell that foo was declared but bar wasn't. You can test for global variables using in:

var global = this;
...
'bar' in global;  // false

But the global object is the only variable object* you can access, you can't access the variable object of any other execution context.

The solution is to always declare variables in an appropriate context.

• The global object isn't really a variable object, it just has properties that match global variables and provide access to them so it just appears to be one.

Guessing from the information I have, you're not actually compiling the program, but trying to run it. That is, ALL_BUILD is set as your startup project. (It should be in a bold font, unlike the other projects in your solution) If you then try to run/debug, you will get the error you describe, because there is simply nothing to run.

The project is most likely generated via CMAKE and included in your Visual Studio solution. Set any of the projects that do generate a .exe as the startup project (by right-clicking on the project and selecting "set as startup project") and you will most likely will be able to start those from within Visual Studio.

here is a simple one

here is my test.php for testing only

<?php

// this is just a test
//send back to the ajax request the request

echo json_encode($_POST);

here is my index.html

<!DOCTYPE html>
<html>

<head>

</head>
<body>

<form id="form" action="" method="post">
Name: <input type="text" name="name"><br>
Age: <input type="text" name="email"><br>
FavColor: <input type="text" name="favc"><br>
<input id="submit" type="button" name="submit" value="submit">
</form>




<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script>
    $(document).ready(function(){
        // click on button submit
        $("#submit").on('click', function(){
            // send ajax
            $.ajax({
                url: 'test.php', // url where to submit the request
                type : "POST", // type of action POST || GET
                dataType : 'json', // data type
                data : $("#form").serialize(), // post data || get data
                success : function(result) {
                    // you can see the result from the console
                    // tab of the developer tools
                    console.log(result);
                },
                error: function(xhr, resp, text) {
                    console.log(xhr, resp, text);
                }
            })
        });
    });

</script>
</body>
</html>

Both file are place in the same directory

I know this is an old thread but to further expand the answer here, by default IIS 7.5 creates application pool identity accounts to run the worker process under. You can't search for these accounts like normal user accounts when adding file permissions. To add them into NTFS permission ACL you can type the entire name of the application pool identity and it will work.

It is just a slight difference in the way the application pool identity accounts are handle as they are seen to be virtual accounts.

Also the username of the application pool identity is "IIS AppPool\application pool name" so if it was the application pool DefaultAppPool the user account would be "IIS AppPool\DefaultAppPool".

These can be seen if you open computer management and look at the members of the local group IIS_IUSRS. The SID appended to the end of them is not need when adding the account into an NTFS permission ACL.

Hope that helps

Comments suggest that git reset --merge is an alias for git merge --abort. It is worth noticing that git merge --abort is only equivalent to git reset --merge given that a MERGE_HEAD is present. This can be read in the git help for merge command.

git merge --abort is equivalent to git reset --merge when MERGE_HEAD is present.

After a failed merge, when there is no MERGE_HEAD, the failed merge can be undone with git reset --merge, but not necessarily with git merge --abort. They are not only old and new syntax for the same thing.

Personally, I find git reset --merge much more powerful for scenarios similar to the described one, and failed merges in general.

Here's a multi-byte safe version of the accepted answer, it works fine for UTF-8 strings:

function startsWith($haystack, $needle)
{
    $length = mb_strlen($needle, 'UTF-8');
    return (mb_substr($haystack, 0, $length, 'UTF-8') === $needle);
}

function endsWith($haystack, $needle)
{
    $length = mb_strlen($needle, 'UTF-8');
    return $length === 0 ||
        (mb_substr($haystack, -$length, $length, 'UTF-8') === $needle);
}

1.Set the delegate of your textfield:

 textField.delegate = self

2.Implement the method in your view controller :

// MARK: Text field delegate

extension ViewController: UITextFieldDelegate {
    func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        return range.location < maxLength (maxLength can be any maximum length you can define)
    }
}

array.length will tell you how many elements are in an array

“pom” packaging is nothing but the container, which contains other packages/modules like jar, war, and ear.

if you perform any operation on outer package/container like mvn clean compile install. then inner packages/modules also get clean compile install.

no need to perform a separate operation for each package/module.