None of the answers worked until I removed the HasNoKey() method from the entity. Dont forget to remove this from your data context or the [Key] attribute will not fix anything.
My App.config looks as below:
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="v11.0" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
</configuration>
I noticed that there is localDB in the path that you mentioned above and has the version v11.0. So I entered (LocalDB\V11.0) in Add Connection dialogue and it worked for me.
I had the same issue.
Make sure that In SQL Server configuration --> SQL Server Services --> SQL Server Agent is enable
This solved my problem
Possibly also check the sessionState
tag in Web.config
Believe it or not, some projects I've worked on will set a connection string here as well.
Setting this config to:
<sessionState mode="InProc" />
Fixed this issue in my case after checking all other connection strings were correct.
Try below piece of code.
this.dataGridView1.RefreshEdit();
First of all you missed ScriptService attribute to add in webservice.
[ScriptService]
After then try following method to call webservice via JSON.
var webAddr = "http://Domain/VBRService.asmx/callJson"; var httpWebRequest = (HttpWebRequest)WebRequest.Create(webAddr); httpWebRequest.ContentType = "application/json; charset=utf-8"; httpWebRequest.Method = "POST"; using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream())) { string json = "{\"x\":\"true\"}"; streamWriter.Write(json); streamWriter.Flush(); } var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse(); using (var streamReader = new StreamReader(httpResponse.GetResponseStream())) { var result = streamReader.ReadToEnd(); return result; }
If you encounter this error in GoDaddy after deploying a .Net MVC web application..And your web.config is absolutely correct... Right click your data project select settings and make sure that the correct connection strings to the GoDaddy server is in use
The Model class should be changed to :
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.ComponentModel.DataAnnotations.Schema;
using System.ComponentModel.DataAnnotations;
namespace MvcApplication1.Models
{
[Table("studentdetails")]
public class student
{
[Key]
public int RollNo { get; set; }
public string Name { get; set; }
public string Stream { get; set; }
public string Div { get; set; }
}
}
In the code below, Class A
implements the interface IShow
and implements its method ShowData
. Class B
inherits Class A
. In order to use ShowData
method in Class B
, we have to use keyword new
in the ShowData
method in order to hide the base class Class A
method and use override
keyword in order to extend the method.
interface IShow
{
protected void ShowData();
}
class A : IShow
{
protected void ShowData()
{
Console.WriteLine("This is Class A");
}
}
class B : A
{
protected new void ShowData()
{
Console.WriteLine("This is Class B");
}
}
The error means that the string you're trying to parse an integer from doesn't actually contain a valid integer.
It's extremely unlikely that the text boxes will contain a valid integer immediately when the form is created - which is where you're getting the integer values. It would make much more sense to update a
and b
in the button click events (in the same way that you are in the constructor). Also, check out the Int.TryParse
method - it's much easier to use if the string might not actually contain an integer - it doesn't throw an exception so it's easier to recover from.
They do now, with latest version of MVC (and jquery validate packages). mvc51-release-notes#Unobtrusive
Thanks to this answer for pointing it out!
Note to under
connetionString =@"server=XXX;Trusted_Connection=yes;database=yourDB;";
Note: XXX = . OR .\SQLEXPRESS OR .\MSSQLSERVER OR (local)\SQLEXPRESS OR (localdb)\v11.0 &...
you can replace 'server' with 'Data Source'
too you can replace 'database' with 'Initial Catalog'
Sample:
connetionString =@"server=.\SQLEXPRESS;Trusted_Connection=yes;Initial Catalog=books;";
I had the same issue. Running exec sp_updatestats
did work sometimes, but not always. I decided to use the NOLOCK
statement in my queries to speed up the queries.
Just add NOLOCK
after your FROM clause, e.g.:
SELECT clicks.entryURL, clicks.entryTime, sessions.userID
FROM sessions, clicks WITH (NOLOCK)
WHERE sessions.sessionID = clicks.sessionID AND clicks.entryTime > DATEADD(day, -1, GETDATE())
Read the full article here.
Set the "AutoSizeColumnsMode" property to "Fill".. By default it is set to 'NONE'. Now columns will be filled across the DatagridView. Then you can set the width of other columns accordingly.
DataGridView1.Columns[0].Width=100;// The id column
DataGridView1.Columns[1].Width=200;// The abbrevation columln
//Third Colulmns 'description' will automatically be resized to fill the remaining
//space
You need to attach the Form1_Load
handler to the Load
event:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Windows.Forms.DataVisualization.Charting;
using System.Diagnostics;
namespace WindowsFormsApplication6
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
Load += Form1_Load;
}
private void Form1_Load(object sender, EventArgs e)
{
Random rnd = new Random();
Chart mych = new Chart();
mych.Height = 100;
mych.Width = 100;
mych.BackColor = SystemColors.Highlight;
mych.Series.Add("duck");
mych.Series["duck"].SetDefault(true);
mych.Series["duck"].Enabled = true;
mych.Visible = true;
for (int q = 0; q < 10; q++)
{
int first = rnd.Next(0, 10);
int second = rnd.Next(0, 10);
mych.Series["duck"].Points.AddXY(first, second);
Debug.WriteLine(first + " " + second);
}
Controls.Add(mych);
}
}
}
I've used HttpClient in .NET 4.0 applications on numerous occasions. If you are familiar with NuGet, you can do an Install-Package Microsoft.Net.Http to add it to your project. See the link below for further details.
I found that I cannot reference System.ComponentModel.DataAnnotations from Silverlight 5 with the below version at (1). I found that Silverlight 5 assemblies cannot use .NET assemblies, it gives the error "You can't add a reference to System.ComponentModel.DataAnnotations as it was not built against the Silverlight runtime. ..." I plan to workaround this by hopefully installing the Silverlight 5 package found at (2) below. If this fails I will update this post.
[UPDATE: it failed. I installed everything relating to Silverlight 5 and I don't have the Silverlight version of the .dll assembly System.ComponentModel.DataAnnotations . Too bad. UPDATE II: I found an old .dll having this name from a previous installation of Silverlight developer's kit for Visual Studio 2008 or 2010. I added this file and it seems to 'work', in that IntelliSense is now recognizing attributes on class members, such as [Display(Name = "My Property Name")].
Whether or not this works for everything else in this .dll I don't know.]
(1)
Microsoft Visual Studio Professional 2013
Version 12.0.21005.1 REL
Microsoft .NET Framework
Version 4.5.51641
Installed Version: Professional
This is a common problem with people getting started. Whenever you update your UI elements from a thread other than the main thread, you need to use:
this.Dispatcher.Invoke(() =>
{
...// your code here.
});
You can also use control.Dispatcher.CheckAccess()
to check whether the current thread owns the control. If it does own it, your code looks as normal. Otherwise, use above pattern.
hey i got same error and the solution to this error is just write Capital M instead of small m.. eg:- static void Main() I hope it helps..
Note that Entity.GetType().BaseType.Name
gives the type name you specified, not the one with all the hex digits in its name.
Have you added the dll into your project references list? If not right click on the project "References" folder and selecet "Add Reference" then use browse to locate your science.dll, select it and click ok.
edit
I can't see the image of your VS instance that some people are referring to and I note that you now say that it works in Net4.0 and VS2010.
VS2008 projects support NET 3.5 by default. I expect that is the problem as your DLL may be NET 4.0 compliant but not NET 3.5.
Your project unable to resolve EntityFramework classes until you not added it in your project. For adding EntityFramework support you have to follow this steps: Tools->Nuget Package Manager ->Manage Nuget package for solution browse EntityFramework It shows latest stable EntityFramework version. currently 6.1.3 is latest version Install it for the selected project.
public class IsNumericAttribute : ValidationAttribute
{
protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
if (value != null)
{
decimal val;
var isNumeric = decimal.TryParse(value.ToString(), out val);
if (!isNumeric)
{
return new ValidationResult("Must be numeric");
}
}
return ValidationResult.Success;
}
}
Dictionary keys should be unique !
In my case, I was using a Dictionary, and I found two items in it have accidentally the same key.
Dictionary<string, string> myDictionary = new Dictionary<string, string>() {
{"KEY1", "V1"},
{"KEY1", "V2" },
{"KEY3", "V3"},
};
my work code. Returns utf8 xml enable empty namespace.
// override StringWriter
public class Utf8StringWriter : StringWriter
{
public override Encoding Encoding => Encoding.UTF8;
}
private string GenerateXmlResponse(Object obj)
{
Type t = obj.GetType();
var xml = "";
using (StringWriter sww = new Utf8StringWriter())
{
using (XmlWriter writer = XmlWriter.Create(sww))
{
var ns = new XmlSerializerNamespaces();
// add empty namespace
ns.Add("", "");
XmlSerializer xsSubmit = new XmlSerializer(t);
xsSubmit.Serialize(writer, obj, ns);
xml = sww.ToString(); // Your XML
}
}
return xml;
}
Example returns response Yandex api payment Aviso url:
<?xml version="1.0" encoding="utf-8"?><paymentAvisoResponse xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" performedDatetime="2017-09-01T16:22:08.9747654+07:00" code="0" shopId="54321" invoiceId="12345" orderSumAmount="10643" />
You don't have the namespace the Login class is in as a reference.
Add the following to the form that uses the Login
class:
using FootballLeagueSystem;
When you want to use a class in another namespace, you have to tell the compiler where to find it. In this case, Login
is inside the FootballLeagueSystem
namespace, or : FootballLeagueSystem.Login
is the fully qualified namespace.
As a commenter pointed out, you declare the Login class inside the FootballLeagueSystem
namespace, but you're using it in the FootballLeague
namespace.
Also, if your PATH's dir is enclosed in quotes, it will work from the command prompt but you'll get the same error message
I.e. this causes an issue with Process.Start() not finding your exe:
PATH="C:\my program\bin";c:\windows\system32
Maybe it helps someone.
The xaml code:
<Grid x:Name="Message2">
<TextBlock Text="This one is manually orange."/>
</Grid>
The c# code:
protected override void OnNavigatedTo(NavigationEventArgs e)
{
CreateNewColorBrush();
}
private void CreateNewColorBrush()
{
SolidColorBrush my_brush = new SolidColorBrush(Color.FromArgb(255, 255, 215, 0));
Message2.Background = my_brush;
}
This one works in windows 8 store app. Try and see. Good luck !
Taking advantage of some of the newer C# language features, you can reduce the line count:
public static TAttribute GetEnumAttribute<TAttribute>(this Enum enumVal) where TAttribute : Attribute
{
var memberInfo = enumVal.GetType().GetMember(enumVal.ToString());
return memberInfo[0].GetCustomAttributes(typeof(TAttribute), false).OfType<TAttribute>().FirstOrDefault();
}
public static string GetEnumDescription(this Enum enumValue) => enumValue.GetEnumAttribute<DescriptionAttribute>()?.Description ?? enumValue.ToString();
You could have them semi-colon delimited in a single value, e.g.
App.config
<add key="paths" value="C:\test1;C:\test2;C:\test3" />
C#
var paths = new List<string>(ConfigurationManager.AppSettings["paths"].Split(new char[] { ';' }));
In your example propertyInfo.GetValue(this, null)
should work. Consider altering GetNamesAndTypesAndValues()
as follows:
public void GetNamesAndTypesAndValues()
{
foreach (PropertyInfo propertyInfo in allClassProperties)
{
Console.WriteLine("{0} [type = {1}] [value = {2}]",
propertyInfo.Name,
propertyInfo.PropertyType,
propertyInfo.GetValue(this, null));
}
}
There is a way. Add these classes:
DefaultDateTimeValueAttribute.cs
using System;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Reflection;
using System.Runtime.CompilerServices;
using Custom.Extensions;
namespace Custom.DefaultValueAttributes
{
/// <summary>
/// This class's DefaultValue attribute allows the programmer to use DateTime.Now as a default value for a property.
/// Inspired from https://code.msdn.microsoft.com/A-flexible-Default-Value-11c2db19.
/// </summary>
[AttributeUsage(AttributeTargets.Property)]
public sealed class DefaultDateTimeValueAttribute : DefaultValueAttribute
{
public string DefaultValue { get; set; }
private object _value;
public override object Value
{
get
{
if (_value == null)
return _value = GetDefaultValue();
return _value;
}
}
/// <summary>
/// Initialized a new instance of this class using the desired DateTime value. A string is expected, because the value must be generated at runtime.
/// Example of value to pass: Now. This will return the current date and time as a default value.
/// Programmer tip: Even if the parameter is passed to the base class, it is not used at all. The property Value is overridden.
/// </summary>
/// <param name="defaultValue">Default value to render from an instance of <see cref="DateTime"/></param>
public DefaultDateTimeValueAttribute(string defaultValue) : base(defaultValue)
{
DefaultValue = defaultValue;
}
public static DateTime GetDefaultValue(Type objectType, string propertyName)
{
var property = objectType.GetProperty(propertyName);
var attribute = property.GetCustomAttributes(typeof(DefaultDateTimeValueAttribute), false)
?.Cast<DefaultDateTimeValueAttribute>()
?.FirstOrDefault();
return attribute.GetDefaultValue();
}
private DateTime GetDefaultValue()
{
// Resolve a named property of DateTime, like "Now"
if (this.IsProperty)
{
return GetPropertyValue();
}
// Resolve a named extension method of DateTime, like "LastOfMonth"
if (this.IsExtensionMethod)
{
return GetExtensionMethodValue();
}
// Parse a relative date
if (this.IsRelativeValue)
{
return GetRelativeValue();
}
// Parse an absolute date
return GetAbsoluteValue();
}
private bool IsProperty
=> typeof(DateTime).GetProperties()
.Select(p => p.Name).Contains(this.DefaultValue);
private bool IsExtensionMethod
=> typeof(DefaultDateTimeValueAttribute).Assembly
.GetType(typeof(DefaultDateTimeExtensions).FullName)
.GetMethods()
.Where(m => m.IsDefined(typeof(ExtensionAttribute), false))
.Select(p => p.Name).Contains(this.DefaultValue);
private bool IsRelativeValue
=> this.DefaultValue.Contains(":");
private DateTime GetPropertyValue()
{
var instance = Activator.CreateInstance<DateTime>();
var value = (DateTime)instance.GetType()
.GetProperty(this.DefaultValue)
.GetValue(instance);
return value;
}
private DateTime GetExtensionMethodValue()
{
var instance = Activator.CreateInstance<DateTime>();
var value = (DateTime)typeof(DefaultDateTimeValueAttribute).Assembly
.GetType(typeof(DefaultDateTimeExtensions).FullName)
.GetMethod(this.DefaultValue)
.Invoke(instance, new object[] { DateTime.Now });
return value;
}
private DateTime GetRelativeValue()
{
TimeSpan timeSpan;
if (!TimeSpan.TryParse(this.DefaultValue, out timeSpan))
{
return default(DateTime);
}
return DateTime.Now.Add(timeSpan);
}
private DateTime GetAbsoluteValue()
{
DateTime value;
if (!DateTime.TryParse(this.DefaultValue, out value))
{
return default(DateTime);
}
return value;
}
}
}
DefaultDateTimeExtensions.cs
using System;
namespace Custom.Extensions
{
/// <summary>
/// Inspired from https://code.msdn.microsoft.com/A-flexible-Default-Value-11c2db19. See usage for more information.
/// </summary>
public static class DefaultDateTimeExtensions
{
public static DateTime FirstOfYear(this DateTime dateTime)
=> new DateTime(dateTime.Year, 1, 1, dateTime.Hour, dateTime.Minute, dateTime.Second, dateTime.Millisecond);
public static DateTime LastOfYear(this DateTime dateTime)
=> new DateTime(dateTime.Year, 12, 31, dateTime.Hour, dateTime.Minute, dateTime.Second, dateTime.Millisecond);
public static DateTime FirstOfMonth(this DateTime dateTime)
=> new DateTime(dateTime.Year, dateTime.Month, 1, dateTime.Hour, dateTime.Minute, dateTime.Second, dateTime.Millisecond);
public static DateTime LastOfMonth(this DateTime dateTime)
=> new DateTime(dateTime.Year, dateTime.Month, DateTime.DaysInMonth(dateTime.Year, dateTime.Month), dateTime.Hour, dateTime.Minute, dateTime.Second, dateTime.Millisecond);
}
}
And use DefaultDateTimeValue as an attribute to your properties. Value to input to your validation attribute are things like "Now", which will be rendered at run time from a DateTime instance created with an Activator. The source code is inspired from this thread: https://code.msdn.microsoft.com/A-flexible-Default-Value-11c2db19. I changed it to make my class inherit with DefaultValueAttribute instead of a ValidationAttribute.
This is the closest thing you can get to a "CONST Dictionary":
public static int GetValueByName(string name)
{
switch (name)
{
case "bob": return 1;
case "billy": return 2;
default: return -1;
}
}
The compiler will be smart enough to build the code as clean as possible.
See this post of mine about "Error creating window handle" and how it relates to USER Objects and the Desktop Heap. I provide some solutions.
From Rick Strahl:
You can chain the ?? operator so that you can do a bunch of null comparisons.
string result = value1 ?? value2 ?? value3 ?? String.Empty;
If you want to know on which platform you are on out of "Linux", "Windows", or "Darwin" (Mac), without more precision, you should use:
>>> import platform
>>> platform.system()
'Linux' # or 'Windows'/'Darwin'
The platform.system
function uses uname
internally.
You may check the following command
sp_configure 'show advanced options', 1;
RECONFIGURE;
GO --Added
sp_configure 'Ad Hoc Distributed Queries', 1;
RECONFIGURE;
GO
SELECT a.*
FROM OPENROWSET('SQLNCLI', 'Server=Seattle1;Trusted_Connection=yes;',
'SELECT GroupName, Name, DepartmentID
FROM AdventureWorks2012.HumanResources.Department
ORDER BY GroupName, Name') AS a;
GO
Or this documentation link
As Diodeus stated, IE doesn't allow anything but the default border for <select>
elements. However, I know of two hacks to achieve a similar effect :
Use a DIV that is placed absolutely at the same position as the dropdown and set it's borders. It will appear that the dropdown has a border.
Use a Javascript solution, for instance, the one provided here.
It may however prove to be too much effort, so you should evaluate if you really require the border.
For mac users, you can use Sequel Pro
(free), which just provide the option to rename Databases. Though it doesn't delete the old DB.
once open the relevant DB just click: Database
--> Rename database...
protected void Page_Init(object sender, EventArgs e)
{
String hostdet = Request.ServerVariables["HTTP_HOST"].ToString();
}
That was a stroll down memory lane...
I replaced awk by perl a long time ago.
Apparently the AWK regular expression engine does not capture its groups.
you might consider using something like :
perl -n -e'/test(\d+)/ && print $1'
the -n flag causes perl to loop over every line like awk does.
I was facing the same issue. I was missing DriverManager.registerDriver() call, before getting the connection using the connection URL and user credentials.
It got fixed on Linux as below:
DriverManager.registerDriver(new org.apache.derby.jdbc.ClientDriver());
connection = DriverManager.getConnection("jdbc:derby://localhost:1527//tmp/Test/DB_Name", user, pass);
For Windows:
DriverManager.registerDriver(new org.apache.derby.jdbc.ClientDriver());
connection = DriverManager.getConnection("jdbc:derby://localhost:1527/C:/Users/Test/DB_Name", user, pass);
You may need an extra "/"
<a href="file:///server/directory/file.xlsx">Click me!</a>
private T GetHeaderControl<T>(Repeater rp, string id) where T : Control
{
T returnValue = null;
if (rp != null && !String.IsNullOrWhiteSpace(id))
{
returnValue = rp.Controls.Cast<RepeaterItem>().Where(i => i.ItemType == ListItemType.Header).Select(h => h.FindControl(id) as T).Where(c => c != null).FirstOrDefault();
}
return returnValue;
}
Finds and casts the control. (Based on Piyey's VB answer)
There is no other way, so this is the best.
Edit: This answer is not valid since PHP 5.4 and higher.
jQuery is not the same as an array. If you want to append something at the end of a jQuery object, use:
$('#fruit').append(veggies);
or to append it to the end of a form value like in your example:
$('#fruit').val($('#fruit').val()+veggies);
In your case, fruitvegbasket
is a string that contains the current value of #fruit
, not an array.
jQuery (jquery.com) allows for DOM manipulation, and the specific function you called val()
returns the value
attribute of an input
element as a string. You can't push something onto a string.
You can't do it in a single query, but you could do it within a transaction. Do the initial MAX() select and lock the table, then do the insert. The transaction ensures that nothing will interrupt the two queries, and the lock ensures that nothing else can try doing the same thing elsewhere at the same time.
in my case, some characters like " , :"'{}[] " maybe corrupt the JSON format, so use try json.loads(str) except to check your input
To uninstall Anaconda open a terminal window:
rm -rf ~/anaconda
~/.bash_profile
and remove the anaconda directory from your PATH
environment variable.Note: You may need to edit .bashrc
and/or .profile
files instead of .bash_profile
Remove the following hidden files and directories, which may have been created in the home directory:
.condarc
.conda
.continuum
Use:
rm -rf ~/.condarc ~/.conda ~/.continuum
Hey to make your image responsive is simple: here is an article i wrote about it. https://medium.com/@ashirazee/react-native-simple-responsive-images-for-all-screen-sizes-with-flex-69f8a96dbc6f
you can simply do this and it will scale
container: {
width: 200,
height: 220
},// container holding your image
image: {
width: '100%',
height: '100%',
resizeMode: cover,
},
});
_x000D_
this is because the container which holds the image determines the height and width, so by using percentages you will be able to make your image responsive to all screens size.
here is another example:
<View style={{
width: 180,
height: 200,
aspectRatio: 1 * 1.4,
}}>
<Image
source={{uri : item.image.url}}
style={{
resizeMode: ‘cover’,
width: ‘100%’,
height: ‘100%’
}}
/>
</View>
_x000D_
Let's say you have a Login
action which provides the user with a login screen, then receives the user name and password back after the user submits the form:
public ActionResult Login() {
return View();
}
public ActionResult Login(string userName, string password) {
// do login stuff
return View();
}
MVC isn't being given clear instructions on which action is which, even though we can tell by looking at it. If you add [HttpGet] to the first action and [HttpPost] to the section action, MVC clearly knows which action is which.
Why? See Request Methods. Long and short: When a user views a page, that's a GET request and when a user submits a form, that's usually a POST request. HttpGet and HttpPost just restrict the action to the applicable request type.
[HttpGet]
public ActionResult Login() {
return View();
}
[HttpPost]
public ActionResult Login(string userName, string password) {
// do login stuff
return View();
}
You can also combine the request method attributes if your action serves requests from multiple verbs:
[AcceptVerbs(HttpVerbs.Get | HttpVerbs.Post)]
.
In Java 8 with stream:
int[] ints = {1, 2, 3};
List<Integer> list = new ArrayList<Integer>();
Collections.addAll(list, Arrays.stream(ints).boxed().toArray(Integer[]::new));
or with Collectors
List<Integer> list = Arrays.stream(ints).boxed().collect(Collectors.toList());
After all i got the answer thanks to wikisona, first the beans:
@Bean
public TomcatEmbeddedServletContainerFactory tomcatFactory() {
return new TomcatEmbeddedServletContainerFactory() {
@Override
protected TomcatEmbeddedServletContainer getTomcatEmbeddedServletContainer(
Tomcat tomcat) {
tomcat.enableNaming();
return super.getTomcatEmbeddedServletContainer(tomcat);
}
@Override
protected void postProcessContext(Context context) {
ContextResource resource = new ContextResource();
resource.setName("jdbc/myDataSource");
resource.setType(DataSource.class.getName());
resource.setProperty("driverClassName", "your.db.Driver");
resource.setProperty("url", "jdbc:yourDb");
context.getNamingResources().addResource(resource);
}
};
}
@Bean(destroyMethod="")
public DataSource jndiDataSource() throws IllegalArgumentException, NamingException {
JndiObjectFactoryBean bean = new JndiObjectFactoryBean();
bean.setJndiName("java:comp/env/jdbc/myDataSource");
bean.setProxyInterface(DataSource.class);
bean.setLookupOnStartup(false);
bean.afterPropertiesSet();
return (DataSource)bean.getObject();
}
the full code it's here: https://github.com/wilkinsona/spring-boot-sample-tomcat-jndi
Encoding an image to base64 will make it about 30% bigger.
See the details in the wikipedia article about the Data URI scheme, where it states:
Base64-encoded data URIs are 1/3 larger in size than their binary equivalent. (However, this overhead is reduced to 2-3% if the HTTP server compresses the response using gzip)
It is quite useful, when you are running on the unix platform, and need to create a text file which will be opened on the dos platform.
Unix uses '\n' as its line terminator, and dos uses '\r\n' as its line terminator, so you can use it to create a dos text file.
If you were asking how to do it in vue2 and make options to insert and delete it, please, have a look an js fiddle
new Vue({_x000D_
el: '#app',_x000D_
data: {_x000D_
finds: [] _x000D_
},_x000D_
methods: {_x000D_
addFind: function () {_x000D_
this.finds.push({ value: 'def' });_x000D_
},_x000D_
deleteFind: function (index) {_x000D_
console.log(index);_x000D_
console.log(this.finds);_x000D_
this.finds.splice(index, 1);_x000D_
}_x000D_
}_x000D_
});
_x000D_
<script src="https://unpkg.com/[email protected]/dist/vue.js"></script>_x000D_
<div id="app">_x000D_
<h1>Finds</h1>_x000D_
<div v-for="(find, index) in finds">_x000D_
<input v-model="find.value">_x000D_
<button @click="deleteFind(index)">_x000D_
delete_x000D_
</button>_x000D_
</div>_x000D_
_x000D_
<button @click="addFind">_x000D_
New Find_x000D_
</button>_x000D_
_x000D_
<pre>{{ $data }}</pre>_x000D_
</div>
_x000D_
An easy way to print the sorted contents of the dictionary, in Python 3:
>>> dict_example = {'c': 1, 'b': 2, 'a': 3}
>>> for key, value in sorted(dict_example.items()):
... print("{} : {}".format(key, value))
...
a : 3
b : 2
c : 1
The expression dict_example.items()
returns tuples, which can then be sorted by sorted()
:
>>> dict_example.items()
dict_items([('c', 1), ('b', 2), ('a', 3)])
>>> sorted(dict_example.items())
[('a', 3), ('b', 2), ('c', 1)]
Below is an example to pretty print the sorted contents of a Python dictionary's values.
for key, value in sorted(dict_example.items(), key=lambda d_values: d_values[1]):
print("{} : {}".format(key, value))
If you're only getting these to manually pass into df.set_index()
, that's unnecessary. Just directly do df.set_index['your_col_name', drop=False]
, already.
It's very rare in pandas that you need to get an index as a Python list (unless you're doing something pretty funky, or else passing them back to NumPy), so if you're doing this a lot, it's a code smell that you're doing something wrong.
From the error it seems that you are trying to import something which is not a class.
If your MyFunctions
is a class, you should import it like this:
<%@page import="com.TransportPortal.MyFunctions"%>
If it is a package and you want to import everything in the package you should do like this:
<%@page import="com.TransportPortal.MyFunctions.* "%>
Edit:
There are two cases which will give you this error, edited to cover both.
$(jQuery.browser.webkit ? "body": "html").animate({ scrollTop: $('#title1').offset().top }, 1000);
The html replace idea is good, but if done to the document.body, the page will blink and ads will disappear.
My solution:
$("*:contains('purrfect')").each(function() {
var replaced = $(this).html().replace(/purrfect/g, "purrfect");
$(this).html(replaced);
});
Try this property of TextView in your layout file..
android:ellipsize="end"
android:maxLines="1"
Solution No.1
var today = new Date();
var day = today.getDay();
var days = ["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"];
var dayname = days[day];
document.write(dayname);
Solution No.2
var today = new Date();
var day = today.getDay();
switch(day){
case 0:
day = "Sunday";
break;
case 1:
day = "Monday";
break;
case 2:
day ="Tuesday";
break;
case 3:
day = "Wednesday";
break;
case 4:
day = "Thrusday";
break;
case 5:
day = "Friday";
break;
case 6:
day = "Saturday";
break;
}
document.write(day);
There are many options out there. cElementTree looks excellent if speed and memory usage are an issue. It has very little overhead compared to simply reading in the file using readlines
.
The relevant metrics can be found in the table below, copied from the cElementTree website:
library time space
xml.dom.minidom (Python 2.1) 6.3 s 80000K
gnosis.objectify 2.0 s 22000k
xml.dom.minidom (Python 2.4) 1.4 s 53000k
ElementTree 1.2 1.6 s 14500k
ElementTree 1.2.4/1.3 1.1 s 14500k
cDomlette (C extension) 0.540 s 20500k
PyRXPU (C extension) 0.175 s 10850k
libxml2 (C extension) 0.098 s 16000k
readlines (read as utf-8) 0.093 s 8850k
cElementTree (C extension) --> 0.047 s 4900K <--
readlines (read as ascii) 0.032 s 5050k
As pointed out by @jfs, cElementTree
comes bundled with Python:
from xml.etree import cElementTree as ElementTree
.from xml.etree import ElementTree
(the accelerated C version is used automatically).Using the google maps projection api to draw the polylines on an overlay view enables us to do a lot of things. Check this repo that has an example.
I have the same wonder today, I did on this way :
//<img src="actual.png" alt="myImage" class=myClass>
$('.myClass').attr('src','').promise().done(function() {
$(this).attr('src','img/new.png');
});
I'd say as long as you have overloads that have 2-4 than you're good to go up higher if you need it.
If you specifically don't want to compare contents of files and only check which one are not present in both of the directories, you can compare lists of files, generated by another command.
diff <(find DIR1 -printf '%P\n' | sort) <(find DIR2 -printf '%P\n' | sort) | grep '^[<>]'
-printf '%P\n'
tells find
to not prefix output paths with the root directory.
I've also added sort
to make sure the order of files will be the same in both calls of find
.
The grep
at the end removes information about identical input lines.
find supports wildcard matches, just add a *
:
find / -type d -name "ora10*"
Try this
frame$twohouses <- ifelse(frame$data>1, 2, 1)
frame
data twohouses
1 0 1
2 1 1
3 2 2
4 3 2
5 4 2
6 2 2
7 3 2
8 1 1
9 4 2
10 3 2
11 2 2
12 4 2
13 0 1
14 1 1
15 2 2
16 0 1
17 2 2
18 1 1
19 2 2
20 0 1
21 4 2
That's not possible. but you can use an Object Mapper like AutoMapper
Example:
class A
{
public int IntProp { get; set; }
}
class B
{
public int IntProp { get; set; }
public string StrProp { get; set; }
}
In global.asax or application startup:
AutoMapper.Mapper.CreateMap<A, B>();
Usage:
var b = AutoMapper.Mapper.Map<B>(a);
It's easily configurable via a fluent API.
You can use tools own browser (Firefox, IE, Chrome...) to debug your JavaScript.
As for resizing, Firefox/Chrome has own resources accessible via Ctrl + Shift + I OR F12. Going tab "style editor" and clicking "adaptive/responsive design" icon.
Old Firefox versions
New Firefox/Firebug
Chrome
*Another way is to install an addon like "Web Developer"
You are using Python 2 methodology instead of Python 3.
Change:
outfile=open('./immates.csv','wb')
To:
outfile=open('./immates.csv','w')
and you will get a file with the following output:
SNo,States,Dist,Population
1,Andhra Pradesh,13,49378776
2,Arunachal Pradesh,16,1382611
3,Assam,27,31169272
4,Bihar,38,103804637
5,Chhattisgarh,19,25540196
6,Goa,2,1457723
7,Gujarat,26,60383628
.....
In Python 3 csv takes the input in text mode, whereas in Python 2 it took it in binary mode.
Edited to Add
Here is the code I ran:
url='http://www.mapsofindia.com/districts-india/'
html = urllib.request.urlopen(url).read()
soup = BeautifulSoup(html)
table=soup.find('table', attrs={'class':'tableizer-table'})
list_of_rows=[]
for row in table.findAll('tr')[1:]:
list_of_cells=[]
for cell in row.findAll('td'):
list_of_cells.append(cell.text)
list_of_rows.append(list_of_cells)
outfile = open('./immates.csv','w')
writer=csv.writer(outfile)
writer.writerow(['SNo', 'States', 'Dist', 'Population'])
writer.writerows(list_of_rows)
DateTime d1 = ...;
DateTime d2 = ...;
Period period = new Period(d1, d2, PeriodType.minutes());
int differenceMinutes = period.getMinutes();
In practice I think this will always give the same result as the answer based on Duration
. For a different time unit than minutes, though, it might be more correct. For example there are 365 days from 2016/2/2 to 2017/2/1, but actually it's less than 1 year and should truncate to 0 years if you use PeriodType.years()
.
In theory the same could happen for minutes because of leap seconds, but Joda doesn't support leap seconds.
There are errors in your meta tag.
Yours:
<meta http-equiv="Content-Security-Policy" content="default-src *; style-src 'self' 'unsafe-inline'; script-src: 'self' 'unsafe-inline' 'unsafe-eval'>
Corrected:
<meta http-equiv="Content-Security-Policy" content="default-src *; style-src 'self' 'unsafe-inline'; script-src 'self' 'unsafe-inline' 'unsafe-eval'"/>
Note the colon after "script-src", and the end double-quote of the meta tag.
I think you want to test
your RegExp in TypeScript, so you have to do like this:
var trigger = "2",
regexp = new RegExp('^[1-9]\d{0,2}$'),
test = regexp.test(trigger);
alert(test + ""); // will display true
You should read MDN Reference - RegExp, the RegExp
object accepts two parameters pattern
and flags
which is nullable(can be omitted/undefined). To test your regex you have to use the .test()
method, not passing the string you want to test inside the declaration of your RegExp!
Why test + ""
?
Because alert()
in TS accepts a string as argument, it is better to write it this way. You can try the full code here.
based on rogerdpack's and Ed999's responses, I've created my .sh version
#!/bin/bash
[ -e list.txt ] && rm list.txt
for f in *.mp4
do
echo "file $f" >> list.txt
done
ffmpeg -f concat -i list.txt -c copy joined-out.mp4 && rm list.txt
it joins all the *.mp4
files in current folder into joined-out.mp4
tested on mac.
resulting filesize is exact sum of my 60 tested files. Should not be any loss. Just what I needed
Just use this. It works only for android api >= 11 before that you'll have to use a ClipData.
ClipboardManager _clipboard = (ClipboardManager) _activity.getSystemService(Context.CLIPBOARD_SERVICE);
_clipboard.setText(YOUR TEXT);
Hope it helped you :)
[UPDATE 3/19/2015]
Just like Ujjwal Singh said it the method setText
is deprecated now, you should use, just as the docs recommande it, setPrimaryClip(clipData)
C# equivalent of your code is
class Imagedata : PDFStreamEngine
{
// C# uses "base" keyword whenever Java uses "super"
// so instead of super(...) in Java we should call its C# equivalent (base):
public Imagedata()
: base(ResourceLoader.loadProperties("org/apache/pdfbox/resources/PDFTextStripper.properties", true))
{ }
// Java methods are virtual by default, when C# methods aren't.
// So we should be sure that processOperator method in base class
// (that is PDFStreamEngine)
// declared as "virtual"
protected override void processOperator(PDFOperator operations, List arguments)
{
base.processOperator(operations, arguments);
}
}
This issue haunted me overnight as well. Here's how to fix it:
This is the TLS Port. I had been using all of the other SMTP ports with no success. If you set enableSsl = true
like this:
Dim SMTP As New SmtpClient(HOST)
SMTP.EnableSsl = True
Trim the username and password fields (good way to prevent errors if user inputs the email and password upon registering like mine does) like this:
SMTP.Credentials = New System.Net.NetworkCredential(EmailFrom.Trim(), EmailFromPassword.Trim())
Using the TLS Port will treat your SMTP as SMTPS allowing you to authenticate. I immediately got a warning from Google saying that my email was blocking an app that has security risks or is outdated. I proceeded to "Turn on less secure apps". Then I updated the information about my phone number and google sent me a verification code via text. I entered it and voila!
I ran the application again and it was successful. I know this thread is old, but I scoured the net reading all the exceptions it was throwing and adding MsgBoxes after every line to see what went wrong. Here's my working code modified for readability as all of my variables are coming from MySQL Database:
Try
Dim MySubject As String = "Email Subject Line"
Dim MyMessageBody As String = "This is the email body."
Dim RecipientEmail As String = "[email protected]"
Dim SenderEmail As String = "[email protected]"
Dim SenderDisplayName As String = "FirstName LastName"
Dim SenderEmailPassword As String = "SenderPassword4Gmail"
Dim HOST = "smtp.gmail.com"
Dim PORT = "587" 'TLS Port
Dim mail As New MailMessage
mail.Subject = MySubject
mail.Body = MyMessageBody
mail.To.Add(RecipientEmail)
mail.From = New MailAddress(SenderEmail, SenderDisplayName)
Dim SMTP As New SmtpClient(HOST)
SMTP.EnableSsl = True
SMTP.Credentials = New System.Net.NetworkCredential(SenderEmail.Trim(), SenderEmailPassword.Trim())
SMTP.DeliveryMethod = SmtpDeliveryMethod.Network
SMTP.Port = PORT
SMTP.Send(mail)
MsgBox("Sent Message To : " & RecipientEmail, MsgBoxStyle.Information, "Sent!")
Catch ex As Exception
MsgBox(ex.ToString)
End Try
I hope this code helps the OP, but also anyone like me arriving to the party late. Enjoy.
Things has been a little bit changed due to the latest updates on Visual Studio Code. The following steps work for me.
Press Ctrl + Shift + P to open the Visual Studio Code command palate.
Type >preferences: Open Settings (JSON)
in the text area.
Add the following lines at the end of the JSON file which is displayed in your right hand pane.
"terminal.integrated.shell.windows": "C:\\Program Files\\Git\\bin\\bash.exe"
Close and reopen your Visual Studio Code instance.
An example with VBScript (.vbs)
Sub sety(wsh, action, typey, vary, value)
Dim wu
Set wu = wsh.Environment(typey)
wui = wu.Item(vary)
Select Case action
Case "ls"
WScript.Echo wui
Case "del"
On Error Resume Next
wu.remove(vary)
On Error Goto 0
Case "set"
wu.Item(vary) = value
Case "add"
If wui = "" Then
wu.Item(vary) = value
ElseIf InStr(UCase(";" & wui & ";"), UCase(";" & value & ";")) = 0 Then
wu.Item(vary) = value & ";" & wui
End If
Case Else
WScript.Echo "Bad action"
End Select
End Sub
Dim wsh, args
Set wsh = WScript.CreateObject("WScript.Shell")
Set args = WScript.Arguments
Select Case WScript.Arguments.Length
Case 3
value = ""
Case 4
value = args(3)
Case Else
WScript.Echo "Arguments - 0: ls,del,set,add; 1: user,system, 2: variable; 3: value"
value = "```"
End Select
If Not value = "```" Then
' 0: ls,del,set,add; 1: user,system, 2: variable; 3: value
sety wsh, args(0), args(1), UCase(args(2)), value
End If
As per dart 2.6
The optional onError
parameter of int.parse
is deprecated. Therefore, you should use int.tryParse
instead.
Note:
The same applies to double.parse
. Therefore, use double.tryParse
instead.
/**
* ...
*
* The [onError] parameter is deprecated and will be removed.
* Instead of `int.parse(string, onError: (string) => ...)`,
* you should use `int.tryParse(string) ?? (...)`.
*
* ...
*/
external static int parse(String source, {int radix, @deprecated int onError(String source)});
The difference is that int.tryParse
returns null
if the source string is invalid.
/**
* Parse [source] as a, possibly signed, integer literal and return its value.
*
* Like [parse] except that this function returns `null` where a
* similar call to [parse] would throw a [FormatException],
* and the [source] must still not be `null`.
*/
external static int tryParse(String source, {int radix});
So, in your case it should look like:
// Valid source value
int parsedValue1 = int.tryParse('12345');
print(parsedValue1); // 12345
// Error handling
int parsedValue2 = int.tryParse('');
if (parsedValue2 == null) {
print(parsedValue2); // null
//
// handle the error here ...
//
}
No, you cannot do that. I invite you to read a POST definition.
Or this page: HTTP, request methods
There is a well-known function that can handle this:
from sklearn.model_selection import train_test_split
X, _, Y, _ = train_test_split(X,Y, test_size=0.0)
Just setting test_size to 0 will avoid splitting and give you shuffled data.
Though it is usually used to split train and test data, it does shuffle them too.
From documentation
Split arrays or matrices into random train and test subsets
Quick utility that wraps input validation and next(ShuffleSplit().split(X, y)) and application to input data into a single call for splitting (and optionally subsampling) data in a oneliner.
System.getProperty("user.dir")
fetches the directory or path of the workspace for the current project
Instead of using
response.sendRedirect("/demo.jsp");
Which does a permanent redirect to an absolute URL path,
Rather use RequestDispatcher
. Example:
RequestDispatcher dispatcher = request.getRequestDispatcher("demo.jsp");
dispatcher.forward(request, response);
check this out: http://hayageek.com/docs/jquery-upload-file.php I've found it accidentally on the net.
I had the same issue and stumbled on this library.
Basically you can ask for multiple permissions sequentially, plus you can add listeners to popup a snackbar if the user denies your permission.
If you have multiple folders in your workspace, set up the search.exclude
on each folder. There's a drop-down next to WORKSPACE SETTINGS
.
I created a sample project on github to load a UIView from a .xib file inside another .xib file. Or you can do it programmatically.
This is good for little widgets you want to reuse on different UIViewController objects.
In the spring framework inside the springframework initialization Repository or controller annotation, the same class name can only exist a default instance, you can set the value name
Run command rndc querylog on
or add querylog yes;
to options{};
section in named.conf
to activate that channel.
Also make sure you’re checking correct directory if your bind is chrooted.
Hands down the easiest way to parse a HTML table is to use pandas.read_html() - it accepts both URLs and HTML.
import pandas as pd
url = r'https://en.wikipedia.org/wiki/List_of_S%26P_500_companies'
tables = pd.read_html(url) # Returns list of all tables on page
sp500_table = tables[0] # Select table of interest
Only downside is that read_html()
doesn't preserve hyperlinks.
If you have different storybord files and if you have outlet references with out outlets creation in your header files then you just remove the connections by right clicking on files owner.
Files owner->Right click->remove unwanted connection over there.
Go through this for clear explanation. What does this mean? "'NSUnknownKeyException', reason: … this class is not key value coding-compliant for the key X"
Run this in command prompt:
netstat -ano | find ":80"
It will show you what process (PID) is listening on port 80.
From there you can open task manager, make sure you have PID selected in columns view option, and find the matching PID to find what process it is.
If its svchost.exe you'll have to dig more (see tasklist /svc
).
I had this happen to me recently and it wasn't any of the popular answers like Skype either, could be Adobe, Java, anything really.
For html formating you don't need to call the Webkit, you could use Html.fromHtml(text)
to do the job.
Source : http://developer.android.com/guide/topics/resources/string-resource.html
You can change the project using the gcloud command:
gcloud config set project <your_project_name>
Three years later, there is now a solution in Ruby 2.3: The squiggly heredoc.
class Subscription
def warning_message
<<~HEREDOC
Subscription expiring soon!
Your free trial will expire in #{days_until_expiration} days.
Please update your billing information.
HEREDOC
end
end
Blog post link: https://infinum.co/the-capsized-eight/articles/multiline-strings-ruby-2-3-0-the-squiggly-heredoc
The indentation of the least-indented line will be removed from each line of the content.
If we want to add custom HTTP headers to a POST request, we must pass them through a dictionary to the headers
parameter.
Here is an example with a non-empty body and headers:
import requests
import json
url = 'https://somedomain.com'
body = {'name': 'Maryja'}
headers = {'content-type': 'application/json'}
r = requests.post(url, data=json.dumps(body), headers=headers)
The solution:
criteria.setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY);
works very well.
No, there is not something as short as a**b
Here is a simple loop, if you want to avoid doubles:
long result = 1;
for (int i = 1; i <= b; i++) {
result *= a;
}
If you want to use pow
and convert the result in to integer, cast the result as follows:
int result = (int)Math.pow(a, b);
HISTTIMEFORMAT="%d/%m/%y %H:%M "
For any commands typed prior to this, it will not help since they will just get a default time of when you turned history on, but it will log the time of any further commands after this.
If you want it to log history for permanent, you should put the following
line in your ~/.bashrc
export HISTTIMEFORMAT="%d/%m/%y %H:%M "
I tried doing sudo pip uninstall numpy
instead, because the rm
didn't work at first.
Hopefully that helps.
Uninstalling then to install it again.
Using Python
New API
:
import docker
client = docker.DockerClient()
container = client.containers.get("NAME")
ip_add = container.attrs['NetworkSettings']['IPAddress']
print(ip_add)
Since it takes 2 mins to respond, you can increase the timeout to 3 mins by adding the below code
scGetruntotals.CommandTimeout = 180;
Note : the parameter value is in seconds.
Lessons to learn from this:
1) Guid is a value type, not a reference type.
2) Calling the default constructor new S()
on any value type always gives you back the all-zero form of that value type, whatever it is. It is logically the same as default(S)
.
I know this post is old, but I had a Situation like this and just want to share my solution. All the answers above work fine. But if you have a Code such as those in data.table chaining Syntax it becomes abit challenging. e.g. I had a Problem like this.
mass <- files[, Veg:=tstrsplit(files$file, "/")[1:4][[1]]][, Rain:=tstrsplit(files$file, "/")[1:4][[2]]][, Roughness:=tstrsplit(files$file, "/")[1:4][[3]]][, Geom:=tstrsplit(files$file, "/")[1:4][[4]]][
time_[s]<=12000]
I tried most of the suggestions above and they didn´t work. but I figured out that they can be split after the comma within []
. Splitting at ][
doesn´t work.
mass <- files[, Veg:=tstrsplit(files$file, "/")[1:4][[1]]][,
Rain:=tstrsplit(files$file, "/")[1:4][[2]]][,
Roughness:=tstrsplit(files$file, "/")[1:4][[3]]][,
Geom:=tstrsplit(files$file, "/")[1:4][[4]]][`time_[s]`<=12000]
Create a Route attribute for your method.
example
[Route("api/Get")]
public IEnumerable<string> Get()
{
return new string[] { "value1", "value2" };
}
You can call like these http://localhost/api/Get
I managed to resolve this issue as follows...
Be careful, make sure you understand the IDE you're using! - Because I didn't. I was trying to import xlsxwriter using PyCharm and was returning this error.
Assuming you have already attempted the pip installation (sudo pip install xlsxwriter) via your cmd prompt, try using another IDE e.g. Geany - & import xlsxwriter.
I tried this and Geany was importing the library fine. I opened PyCharm and navigated to 'File>Settings>Project:>Project Interpreter' xlslwriter was listed though intriguingly I couldn't import it! I double clicked xlsxwriter and hit 'install Package'... And thats it! It worked!
Hope this helps...
It might help who is looking for the same solution.
select * from tablename ORDER BY ABS(column_name)
I suggest that you take a look at the Java docs for these methods. It appears that you are using them incorrectly. These methods will not tell you if the string is a valid boolean value, but instead they return a boolean, set to true or false, based on the string that you pass in, "true" or "false".
no lambda method
# sort dictionary by value
d = {'a1': 'fsdfds', 'g5': 'aa3432ff', 'ca':'zz23432'}
def getkeybyvalue(d,i):
for k, v in d.items():
if v == i:
return (k)
sortvaluelist = sorted(d.values())
sortresult ={}
for i1 in sortvaluelist:
key = getkeybyvalue(d,i1)
sortresult[key] = i1
print ('=====sort by value=====')
print (sortresult)
print ('=======================')
I've adapter the answer of ltiong_sh to work for me:
function nextField(current){
var elements = document.getElementById("my-form").elements;
var exit = false;
for(i = 0; i < elements.length; i++){
if (exit) {
elements[i].focus();
if (elements[i].type == 'text'){
elements[i].select();
}
break;
}
if (elements[i].isEqualNode(current)) {
exit = true;
}
}
}
Using Now() is not a good idea. It only save the current time and date. It will not update the the current date and time, when you update your data. If you want to add the time once, The default value =Now() is best option. If you want to use timestamp. and want to update the this value, each time that row is updated. Then, trigger is best option to use.
These two toturial will help to implement the trigger.
obj= Model.objects.filter(testfield=12).order_by('-id')[0]
Follow the link below and configure it to what you need. Daterangepicker does it for you, very easily. :)
Douglas Crockford had a remark about how he wished JavaScript contained a loop
structure:
loop
{
...code...
}
And I don't think Java would be any worse for having a loop
structure either.
There's nothing inherently wrong with while(true)
loops, but there is a tendency for teachers to discourage them. From the teaching perspective, it's very easy to have students create endless loops and not understand why the loop isn't ever escaped.
But what they rarely mention is that all looping mechanisms can be replicated with while(true)
loops.
while( a() )
{
fn();
}
is the same as
loop
{
if ( !a() ) break;
fn();
}
and
do
{
fn();
} while( a() );
is the same as:
loop
{
fn();
if ( !a() ) break;
}
and
for ( a(); b(); c() )
{
fn();
}
is the same as:
a();
loop
{
if ( !b() ) break;
fn();
c();
}
As long as you can set up your loops in a way that works the construct that you choose to use is unimportant. If it happens to fit in a for
loop, use a for
loop.
One last part: keep your loops simple. If there's a lot of functionality that needs to happen on every iteration, put it in a function. You can always optimize it after you've got it working.
I found this question because I wanted independent access to BOTH the response and the content in order to add some error handling for the user.
You can print the HTTP status code to std out and write the contents to another file.
curl -s -o response.txt -w "%{http_code}" http://example.com
This allows you to check the return code and then decide if the response is worth printing, processing, logging, etc.
http_response=$(curl -s -o response.txt -w "%{http_code}" http://example.com)
if [ $http_response != "200" ]; then
# handle error
else
echo "Server returned:"
cat response.txt
fi
A good practice is also to use a constant for the key to avoid bugs where you do not store and read with the same key
NSString* const TIME_STAMPS_KEY = @"TIME_STAMPS_KEY";
Here's a cleaner, more "plug-and-play", version of @Nagasaki45's answer. Unlike many other answers here, it works properly with strings of different lengths. It achieves this by clearing the line with just as many spaces as the length of the last line printed print. Will also work on Windows.
def print_statusline(msg: str):
last_msg_length = len(print_statusline.last_msg) if hasattr(print_statusline, 'last_msg') else 0
print(' ' * last_msg_length, end='\r')
print(msg, end='\r')
sys.stdout.flush() # Some say they needed this, I didn't.
print_statusline.last_msg = msg
Simply use it like this:
for msg in ["Initializing...", "Initialization successful!"]:
print_statusline(msg)
time.sleep(1)
This small test shows that lines get cleared properly, even for different lengths:
for i in range(9, 0, -1):
print_statusline("{}".format(i) * i)
time.sleep(0.5)
You can use COLLATE NOCASE
in your SELECT
query:
SELECT * FROM ... WHERE name = 'someone' COLLATE NOCASE
Additionaly, in SQLite, you can indicate that a column should be case insensitive when you create the table by specifying collate nocase
in the column definition (the other options are binary
(the default) and rtrim
; see here). You can specify collate nocase
when you create an index as well. For example:
create table Test ( Text_Value text collate nocase ); insert into Test values ('A'); insert into Test values ('b'); insert into Test values ('C'); create index Test_Text_Value_Index on Test (Text_Value collate nocase);
Expressions involving Test.Text_Value
should now be case insensitive. For example:
sqlite> select Text_Value from Test where Text_Value = 'B'; Text_Value ---------------- b sqlite> select Text_Value from Test order by Text_Value; Text_Value ---------------- A b C sqlite> select Text_Value from Test order by Text_Value desc; Text_Value ---------------- C b A
The optimiser can also potentially make use of the index for case-insensitive searching and matching on the column. You can check this using the explain
SQL command, e.g.:
sqlite> explain select Text_Value from Test where Text_Value = 'b'; addr opcode p1 p2 p3 ---------------- -------------- ---------- ---------- --------------------------------- 0 Goto 0 16 1 Integer 0 0 2 OpenRead 1 3 keyinfo(1,NOCASE) 3 SetNumColumns 1 2 4 String8 0 0 b 5 IsNull -1 14 6 MakeRecord 1 0 a 7 MemStore 0 0 8 MoveGe 1 14 9 MemLoad 0 0 10 IdxGE 1 14 + 11 Column 1 0 12 Callback 1 0 13 Next 1 9 14 Close 1 0 15 Halt 0 0 16 Transaction 0 0 17 VerifyCookie 0 4 18 Goto 0 1 19 Noop 0 0
This is a function for calculating max valid length for varchar(Nn):
CREATE FUNCTION [dbo].[GetMaxVarcharColumnLength] (@TableSchema NVARCHAR(MAX), @TableName NVARCHAR(MAX), @ColumnName VARCHAR(MAX))
RETURNS INT
AS
BEGIN
RETURN (SELECT character_maximum_length FROM information_schema.columns
WHERE table_schema = @TableSchema AND table_name = @TableName AND column_name = @ColumnName);
END
Usage:
IF LEN(@Name) > [dbo].[GetMaxVarcharColumnLength]('person', 'FamilyStateName', 'Name')
RETURN [dbo].[err_Internal_StringForVarcharTooLong]();
I use Google's JSON library to serialize it then create a new instance of the serialized object. It does deep copy with a few restrictions:
there can't be any recursive references
it won't copy arrays of disparate types
arrays and lists should be typed or it won't find the class to instantiate
you may need to encapsulate strings in a class you declare yourself
I also use this class to save user preferences, windows and whatnot to be reloaded at runtime. It is very easy to use and effective.
import com.google.gson.*;
public class SerialUtils {
//___________________________________________________________________________________
public static String serializeObject(Object o) {
Gson gson = new Gson();
String serializedObject = gson.toJson(o);
return serializedObject;
}
//___________________________________________________________________________________
public static Object unserializeObject(String s, Object o){
Gson gson = new Gson();
Object object = gson.fromJson(s, o.getClass());
return object;
}
//___________________________________________________________________________________
public static Object cloneObject(Object o){
String s = serializeObject(o);
Object object = unserializeObject(s,o);
return object;
}
}
As jean-baptiste-yunès said, if your stream is based on a java List then using an AtomicInteger and its incrementAndGet method is a very good solution to the problem and the returned integer does correspond to the index in the original List as long as you do not use a parallel stream.
Floats are used to store a wider range of number than can be fit in an integer. These include decimal numbers and scientific notation style numbers that can be bigger values than can fit in 32 bits. Here's the deep dive into them: http://en.wikipedia.org/wiki/Floating_point
map
isn't particularly pythonic. I would recommend using list comprehensions instead:
map(f, iterable)
is basically equivalent to:
[f(x) for x in iterable]
map
on its own can't do a Cartesian product, because the length of its output list is always the same as its input list. You can trivially do a Cartesian product with a list comprehension though:
[(a, b) for a in iterable_a for b in iterable_b]
The syntax is a little confusing -- that's basically equivalent to:
result = []
for a in iterable_a:
for b in iterable_b:
result.append((a, b))
The answer is given but think that for some situation this will be also interesting way to get string from NSInteger
NSInteger value = 12;
NSString * string = [NSString stringWithFormat:@"%0.0f", (float)value];
How about:
if (stream.markSupported() == false) {
// lets replace the stream object
ByteArrayOutputStream baos = new ByteArrayOutputStream();
IOUtils.copy(stream, baos);
stream.close();
stream = new ByteArrayInputStream(baos.toByteArray());
// now the stream should support 'mark' and 'reset'
}
A more modern answer for an old question:
MainActivity.kt
private var myMenuIconEnabled by Delegates.observable(true) { _, old, new ->
if (new != old) invalidateOptionsMenu()
}
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
findViewById<Button>(R.id.my_button).setOnClickListener { myMenuIconEnabled = false }
}
override fun onCreateOptionsMenu(menu: Menu?): Boolean {
menuInflater.inflate(R.menu.menu_main_activity, menu)
return super.onCreateOptionsMenu(menu)
}
override fun onPrepareOptionsMenu(menu: Menu): Boolean {
menu.findItem(R.id.action_my_action).isEnabled = myMenuIconEnabled
return super.onPrepareOptionsMenu(menu)
}
menu_main_activity.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="@+id/action_my_action"
android:icon="@drawable/ic_my_icon_24dp"
app:iconTint="@drawable/menu_item_icon_selector"
android:title="My title"
app:showAsAction="always" />
</menu>
menu_item_icon_selector.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:color="?enabledMenuIconColor" android:state_enabled="true" />
<item android:color="?disabledMenuIconColor" />
attrs.xml
<resources>
<attr name="enabledMenuIconColor" format="reference|color"/>
<attr name="disabledMenuIconColor" format="reference|color"/>
</resources>
styles.xml or themes.xml
<style name="AppTheme" parent="Theme.MaterialComponents.Light.NoActionBar">
<!-- Customize your theme here. -->
<item name="disabledMenuIconColor">@color/white_30_alpha</item>
<item name="enabledMenuIconColor">@android:color/white</item>
In my case, another program had added PATH
changes to .bashrc
If the other program changed the PATH
after nvm's initialisation, then nvm's PATH
changes would be forgotten, and we would get the system node on our PATH
(or no node).
The solution was to move the nvm setup to the bottom of .bashrc
### BAD .bashrc ###
# NVM initialisation
export NVM_DIR="$HOME/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh" # This loads nvm
# Some other program adding to the PATH:
export PATH="$ANT_ROOT:$PATH"
Solution:
### GOOD .bashrc ###
# Some other program adding to the PATH:
export PATH="$ANT_ROOT:$PATH"
# NVM initialisation
export NVM_DIR="$HOME/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh" # This loads nvm
(This was with bash 4.2.46 on CentOS. It seems to me like a bug in bash, but I may be mistaken.)
Box and Cox (1964) suggested a family of transformations designed to reduce nonnormality of the errors in a linear model. In turns out that in doing this, it often reduces non-linearity as well.
Here is a nice summary of the original work and all the work that's been done since: http://www.ime.usp.br/~abe/lista/pdfm9cJKUmFZp.pdf
You will notice, however, that the log-likelihood function governing the selection of the lambda power transform is dependent on the residual sum of squares of an underlying model (no LaTeX on SO -- see the reference), so no transformation can be applied without a model.
A typical application is as follows:
library(MASS)
# generate some data
set.seed(1)
n <- 100
x <- runif(n, 1, 5)
y <- x^3 + rnorm(n)
# run a linear model
m <- lm(y ~ x)
# run the box-cox transformation
bc <- boxcox(y ~ x)
(lambda <- bc$x[which.max(bc$y)])
[1] 0.4242424
powerTransform <- function(y, lambda1, lambda2 = NULL, method = "boxcox") {
boxcoxTrans <- function(x, lam1, lam2 = NULL) {
# if we set lambda2 to zero, it becomes the one parameter transformation
lam2 <- ifelse(is.null(lam2), 0, lam2)
if (lam1 == 0L) {
log(y + lam2)
} else {
(((y + lam2)^lam1) - 1) / lam1
}
}
switch(method
, boxcox = boxcoxTrans(y, lambda1, lambda2)
, tukey = y^lambda1
)
}
# re-run with transformation
mnew <- lm(powerTransform(y, lambda) ~ x)
# QQ-plot
op <- par(pty = "s", mfrow = c(1, 2))
qqnorm(m$residuals); qqline(m$residuals)
qqnorm(mnew$residuals); qqline(mnew$residuals)
par(op)
As you can see this is no magic bullet -- only some data can be effectively transformed (usually a lambda less than -2 or greater than 2 is a sign you should not be using the method). As with any statistical method, use with caution before implementing.
To use the two parameter Box-Cox transformation, use the geoR
package to find the lambdas:
library("geoR")
bc2 <- boxcoxfit(x, y, lambda2 = TRUE)
lambda1 <- bc2$lambda[1]
lambda2 <- bc2$lambda[2]
EDITS: Conflation of Tukey and Box-Cox implementation as pointed out by @Yui-Shiuan fixed.
Here is your answer which is way to solve.You do not want to use jquery when you restricted the user input in textbox control.
<input type="text" id="my_txtbox" readonly /> <!--HTML5-->
<input type="text" id="my_txtbox" readonly="true"/>
It may be overkill for what you are looking for, yet I suggest a jQuery plugin called autoNumeric() - it is great!
You can limit to only numbers, decimal precision, max / min values and more.
Java has two kind of Variables
a)
Class Level (Static) :
They are one per Class.Say you have Student Class and defined name as static variable.Now no matter how many student object you create all will have same name.
Object Level :
They belong to per Object.If name is non-static ,then all student can have different name.
b)
Class Level :
This variables are initialized on Class load.So even if no student object is created you can still access and use static name variable.
Object Level:
They will get initialized when you create a new object ,say by new();
C)
Your Problem :
Your class is Just loaded in JVM and you have called its main (static) method : Legally allowed.
Now from that you want to call an Object varibale : Where is the object ??
You have to create a Object and then only you can access Object level varibales.
void 0
mean?void
[MDN] is a prefix keyword that takes one argument and always returns undefined
.
Examples
void 0
void (0)
void "hello"
void (new Date())
//all will return undefined
It seems pretty useless, doesn't it? If it always returns undefined
, what's wrong with just using undefined
itself?
In a perfect world we would be able to safely just use undefined
: it's much simpler and easier to understand than void 0
. But in case you've never noticed before, this isn't a perfect world, especially when it comes to Javascript.
The problem with using undefined
was that undefined
is not a reserved word (it is actually a property of the global object [wtfjs]). That is, undefined
is a permissible variable name, so you could assign a new value to it at your own caprice.
alert(undefined); //alerts "undefined"
var undefined = "new value";
alert(undefined) // alerts "new value"
Note: This is no longer a problem in any environment that supports ECMAScript 5 or newer (i.e. in practice everywhere but IE 8), which defines the undefined
property of the global object as read-only (so it is only possible to shadow the variable in your own local scope). However, this information is still useful for backwards-compatibility purposes.
alert(window.hasOwnProperty('undefined')); // alerts "true"
alert(window.undefined); // alerts "undefined"
alert(undefined === window.undefined); // alerts "true"
var undefined = "new value";
alert(undefined); // alerts "new value"
alert(undefined === window.undefined); // alerts "false"
void
, on the other hand, cannot be overidden. void 0
will always return undefined
. undefined
, on the other hand, can be whatever Mr. Javascript decides he wants it to be.
void 0
, specifically?Why should we use void 0
? What's so special about 0
? Couldn't we just as easily use 1
, or 42
, or 1000000
or "Hello, world!"
?
And the answer is, yes, we could, and it would work just as well. The only benefit of passing in 0
instead of some other argument is that 0
is short and idiomatic.
Although undefined
can generally be trusted in modern JavaScript environments, there is one trivial advantage of void 0
: it's shorter. The difference is not enough to worry about when writing code but it can add up enough over large code bases that most code minifiers replace undefined
with void 0
to reduce the number of bytes sent to the browser.
Same thing you'd expect from normal modulo .. e.g. 7 % 4 = 3
, 7.3 % 4.0 = 3.3
Beware of floating point accuracy issues.
CASE
isn't used for flow control... for this, you would need to use IF
...
But, there's a set-based solution to this problem instead of the procedural approach:
UPDATE tblEmployee
SET
InOffice = CASE WHEN @NewStatus = 'InOffice' THEN -1 ELSE InOffice END,
OutOffice = CASE WHEN @NewStatus = 'OutOffice' THEN -1 ELSE OutOffice END,
Home = CASE WHEN @NewStatus = 'Home' THEN -1 ELSE Home END
WHERE EmpID = @EmpID
Note that the ELSE
will preserves the original value if the @NewStatus
condition isn't met.
While taking the advice above with schtasks, you can see in the UI what must be done to perform an hourly task. When you edit trigger begin the task on a schedule, One Time (this is the key). Then you can select "Repeat task every:" 1 hour or whatever you wish. See screenshot:
The solution is:
package basic;
import custom.ds.nodes.Node;
public class RevLinkedList {
private static Node<Integer> first = null;
public static void main(String[] args) {
Node<Integer> f = new Node<Integer>();
Node<Integer> s = new Node<Integer>();
Node<Integer> t = new Node<Integer>();
Node<Integer> fo = new Node<Integer>();
f.setNext(s);
s.setNext(t);
t.setNext(fo);
fo.setNext(null);
f.setItem(1);
s.setItem(2);
t.setItem(3);
fo.setItem(4);
Node<Integer> curr = f;
display(curr);
revLL(null, f);
display(first);
}
public static void display(Node<Integer> curr) {
while (curr.getNext() != null) {
System.out.println(curr.getItem());
System.out.println(curr.getNext());
curr = curr.getNext();
}
}
public static void revLL(Node<Integer> pn, Node<Integer> cn) {
while (cn.getNext() != null) {
revLL(cn, cn.getNext());
break;
}
if (cn.getNext() == null) {
first = cn;
}
cn.setNext(pn);
}
}
from urllib.request import Request, urlopen
url="https://svnweb.freebsd.org/csrg/share/dict/words?revision=61569&view=co"
req = Request(url, headers={'User-Agent': 'Mozilla/5.0'})
web_byte = urlopen(req).read()
webpage = web_byte.decode('utf-8')
print(webpage)
Randomizing the first 500 words
from urllib.request import Request, urlopen
import random
url="https://svnweb.freebsd.org/csrg/share/dict/words?revision=61569&view=co"
req = Request(url, headers={'User-Agent': 'Mozilla/5.0'})
web_byte = urlopen(req).read()
webpage = web_byte.decode('utf-8')
first500 = webpage[:500].split("\n")
random.shuffle(first500)
print(first500)
Output
['abnegation', 'able', 'aborning', 'Abigail', 'Abidjan', 'ablaze', 'abolish', 'abbe', 'above', 'abort', 'aberrant', 'aboriginal', 'aborigine', 'Aberdeen', 'Abbott', 'Abernathy', 'aback', 'abate', 'abominate', 'AAA', 'abc', 'abed', 'abhorred', 'abolition', 'ablate', 'abbey', 'abbot', 'Abelson', 'ABA', 'Abner', 'abduct', 'aboard', 'Abo', 'abalone', 'a', 'abhorrent', 'Abelian', 'aardvark', 'Aarhus', 'Abe', 'abjure', 'abeyance', 'Abel', 'abetting', 'abash', 'AAAS', 'abdicate', 'abbreviate', 'abnormal', 'abject', 'abacus', 'abide', 'abominable', 'abode', 'abandon', 'abase', 'Ababa', 'abdominal', 'abet', 'abbas', 'aberrate', 'abdomen', 'abetted', 'abound', 'Aaron', 'abhor', 'ablution', 'abeyant', 'about']
Here you can not push the object to a state array like this. You can push like your way in normal array. Here you have to set the state,
this.setState({
myArray: [...this.state.myArray, 'new value']
})
You could try using MultiMap instead of HashMap
Initialising it will require fewer lines of codes. Adding and retrieving the values will also make it shorter.
Map<String, List<Integer>> map = new HashMap<String, List<Integer>>();
would become:
Multimap<String, Integer> multiMap = ArrayListMultimap.create();
You can check this link: http://java.dzone.com/articles/hashmap-%E2%80%93-single-key-and
Literally dozens of answers in this and linked questions and elsewhere at SE, all of which are deficient in this way or another, have clearly shown that Windows doesn't provide a reliable built-in console utility. So, it's time to roll out your own.
The following C code, based on Detect if program is running with full administrator rights, works in Win2k+1, anywhere and in all cases (UAC, domains, transitive groups...) - because it does the same as the system itself when it checks permissions. It signals of the result both with a message (that can be silenced with a switch) and exit code.
It only needs to be compiled once, then you can just copy the .exe
everywhere - it only depends on kernel32.dll
and advapi32.dll
(I've uploaded a copy).
chkadmin.c
:
#include <malloc.h>
#include <stdio.h>
#include <windows.h>
#pragma comment (lib,"Advapi32.lib")
int main(int argc, char** argv) {
BOOL quiet = FALSE;
DWORD cbSid = SECURITY_MAX_SID_SIZE;
PSID pSid = _alloca(cbSid);
BOOL isAdmin;
if (argc > 1) {
if (!strcmp(argv[1],"/q")) quiet=TRUE;
else if (!strcmp(argv[1],"/?")) {fprintf(stderr,"Usage: %s [/q]\n",argv[0]);return 0;}
}
if (!CreateWellKnownSid(WinBuiltinAdministratorsSid,NULL,pSid,&cbSid)) {
fprintf(stderr,"CreateWellKnownSid: error %d\n",GetLastError());exit(-1);}
if (!CheckTokenMembership(NULL,pSid,&isAdmin)) {
fprintf(stderr,"CheckTokenMembership: error %d\n",GetLastError());exit(-1);}
if (!quiet) puts(isAdmin ? "Admin" : "Non-admin");
return !isAdmin;
}
1MSDN claims the APIs are XP+ but this is false. CheckTokenMembership
is 2k+ and the other one is even older. The last link also contains a much more complicated way that would work even in NT.
For me the solution was a much simpler one. In my Solution Explorer in Visual Studio, I right click on the web project, chose properties and then navigated to the "web" tab. From there I changed the Project URL to another port number. For example, if it was http://localhost:1052
- I changed it to http://localhost:4356.
Not sure if this helps anyone else, but it worked for me - hopefully it will work for you too!
you can use,
this.props.history.push("/template", { ...response })
or
this.props.history.push("/template", { response: response })
then you can access the parsed data from /template
component by following code,
const state = this.props.location.state
Read more about React Session History Management
Try one of these:
ApplicationRef.tick()
- similar to AngularJS's $rootScope.$digest()
-- i.e., check the full component treeNgZone.run(callback)
- similar to $rootScope.$apply(callback)
-- i.e., evaluate the callback function inside the Angular zone. I think, but I'm not sure, that this ends up checking the full component tree after executing the callback function.ChangeDetectorRef.detectChanges()
- similar to $scope.$digest()
-- i.e., check only this component and its childrenYou can inject ApplicationRef
, NgZone
, or ChangeDetectorRef
into your component.
<script language="javascript">
window.onresize = function() {
document.getElementById('ctl00_ContentPlaceHolder1_Accordion1').style.height = '100%';
}
</script>
How your URLs look have nothing to do with REST. Anything goes. It actually is an "implementation detail". So just like how you name your variables. All they have to be is unique and durable.
Don't waste too much time on this, just make a choice and stick to it/be consistent. For example if you go with hierarchies then you do it for all your resources. If you go with query parameters...etc just like naming conventions in your code.
Why so ? As far as I know a "RESTful" API is to be browsable (you know..."Hypermedia as the Engine of Application State"), therefore an API client does not care about what your URLs are like as long as they're valid (there's no SEO, no human that needs to read those "friendly urls", except may be for debugging...)
How nice/understandable a URL is in a REST API is only interesting to you as the API developer, not the API client, as would the name of a variable in your code be.
The most important thing is that your API client know how to interpret your media type. For example it knows that :
Below is an example HTTP exchange (bodies are in yaml since it's easier to write):
Request
GET / HTTP/1.1
Host: api.acme.io
Accept: text/yaml, text/acme-mediatype+yaml
Response: a list of links to main resource (companies, people, whatever...)
HTTP/1.1 200 OK
Date: Tue, 05 Apr 2016 15:04:00 GMT
Last-Modified: Tue, 05 Apr 2016 00:00:00 GMT
Content-Type: text/acme-mediatype+yaml
# body: this is your API's entrypoint (like a homepage)
links:
# could be some random path https://api.acme.local/modskmklmkdsml
# the only thing the API client cares about is the key (or rel) "companies"
companies: https://api.acme.local/companies
people: https://api.acme.local/people
Request: link to companies (using previous response's body.links.companies)
GET /companies HTTP/1.1
Host: api.acme.local
Accept: text/yaml, text/acme-mediatype+yaml
Response: a partial list of companies (under items), the resource contains related links, like link to get the next couple of companies (body.links.next) an other (templated) link to search (body.links.search)
HTTP/1.1 200 OK
Date: Tue, 05 Apr 2016 15:06:00 GMT
Last-Modified: Tue, 05 Apr 2016 00:00:00 GMT
Content-Type: text/acme-mediatype+yaml
# body: representation of a list of companies
links:
# link to the next page
next: https://api.acme.local/companies?page=2
# templated link for search
search: https://api.acme.local/companies?query={query}
# you could provide available actions related to this resource
actions:
add:
href: https://api.acme.local/companies
method: POST
items:
- name: company1
links:
self: https://api.acme.local/companies/8er13eo
# and here is the link to departments
# again the client only cares about the key department
department: https://api.acme.local/companies/8er13eo/departments
- name: company2
links:
self: https://api.acme.local/companies/9r13d4l
# or could be in some other location !
department: https://api2.acme.local/departments?company=8er13eo
So as you see if you go the links/relations way how you structure the path part of your URLs does't have any value to your API client. And if your are communicating the structure of your URLs to your client as documentation, then your are not doing REST (or at least not Level 3 as per "Richardson's maturity model")
Yes to your second and third questions -- that's what you need to do as you cannot have multiple 'lvalues' on the left of an assignment.
A few people actually missed a very important point - 'throw' and 'throw ex' may do the same thing but they don't give you a crucial piece of imformation which is the line where the exception happened.
Consider the following code:
static void Main(string[] args)
{
try
{
TestMe();
}
catch (Exception ex)
{
string ss = ex.ToString();
}
}
static void TestMe()
{
try
{
//here's some code that will generate an exception - line #17
}
catch (Exception ex)
{
//throw new ApplicationException(ex.ToString());
throw ex; // line# 22
}
}
When you do either a 'throw' or 'throw ex' you get the stack trace but the line# is going to be #22 so you can't figure out which line exactly was throwing the exception (unless you have only 1 or few lines of code in the try block). To get the expected line #17 in your exception you'll have to throw a new exception with the original exception stack trace.
I strongly disagree with some previous solutions that recommended to run both services in the same container. It's clearly stated in the documentation that it's not a recommended:
It is generally recommended that you separate areas of concern by using one service per container. That service may fork into multiple processes (for example, Apache web server starts multiple worker processes). It’s ok to have multiple processes, but to get the most benefit out of Docker, avoid one container being responsible for multiple aspects of your overall application. You can connect multiple containers using user-defined networks and shared volumes.
There are good use cases for supervisord or similar programs but running a web application + database is not part of them.
You should definitely use docker-compose to do that and orchestrate multiple containers with different responsibilities.
You can use BIGINT as follows:
CREATE TABLE user_reg (
user_id INT NOT NULL AUTO_INCREMENT,
identifier INT,
phone_number CHAR(11) NOT NULL,
verified TINYINT UNSIGNED NOT NULL,
reg_time BIGINT,
last_active_time BIGINT,
PRIMARY KEY (user_id),
INDEX (phone_number, user_id, identifier)
);
Typically one would use one (or more) image tags, maybe in combination with setting div background images in css to act as the submit button. The actual submit would be done in javascript on the click event.
A tutorial on the subject.
For the filestream:
//Check if the directory exists
if (!System.IO.Directory.Exists(@"C:\yourDirectory"))
{
System.IO.Directory.CreateDirectory(@"C:\yourDirectory");
}
//Write the file
using (System.IO.StreamWriter outfile = new System.IO.StreamWriter(@"C:\yourDirectory\yourFile.txt"))
{
outfile.Write(yourFileAsString);
}
So if your scenario is that you've committed to master
but meant to commit to another-branch
(which may or not may not already exist) but you haven't pushed yet, this is pretty easy to fix.
// if your branch doesn't exist, then add the -b argument
git checkout -b another-branch
git branch --force master origin/master
Now all your commits to master
will be on another-branch
.
Sourced with love from: http://haacked.com/archive/2015/06/29/git-migrate/
assert
is a debugging tool that will cause the program to throw an AssertionFailed
exception if the condition is not true. In this case, the program will throw an exception if either of the two conditions following it evaluate to false. Generally speaking, assert
should not be used in production code
Here is example how to remove NULL characters using ex
(in-place):
ex -s +"%s/\%x00//g" -cwq nulls.txt
and for multiple files:
ex -s +'bufdo!%s/\%x00//g' -cxa *.txt
For recursivity, you may use globbing option **/*.txt
(if it is supported by your shell).
Useful for scripting since sed
and its -i
parameter is a non-standard BSD extension.
See also: How to check if the file is a binary file and read all the files which are not?
If you choose use the way Samuh describes, remember that only primitive values can be sent. That is, values that are parcable. So, if your object contains complex objects these will not follow. For example, variables like Bitmap, HashMap etc... These are tricky to pass by the intent.
In general I would advice you to send only primitive datatypes as extras, like String, int, boolean etc. In your case it would be: String fname
, String lname
, int age
, and String address
.
My opinion: More complex objects are better shared by implementing a ContentProvider, SDCard, etc. It's also possible to use a static variable, but this may fastly lead to error-prone code...
But again, it's just my subjective opinion.
If you want to assert that the two lists are identical, don't complicate things with Hamcrest:
assertEquals(expectedList, actual.getList());
If you really intend to perform an order-insensitive comparison, you can call the containsInAnyOrder
varargs method and provide values directly:
assertThat(actual.getList(), containsInAnyOrder("item1", "item2"));
(Assuming that your list is of String
, rather than Agent
, for this example.)
If you really want to call that same method with the contents of a List
:
assertThat(actual.getList(), containsInAnyOrder(expectedList.toArray(new String[expectedList.size()]));
Without this, you're calling the method with a single argument and creating a Matcher
that expects to match an Iterable
where each element is a List
. This can't be used to match a List
.
That is, you can't match a List<Agent>
with a Matcher<Iterable<List<Agent>>
, which is what your code is attempting.
In DOS you couldn't use environment variables on the command line, only in batch files, where they used the %
sign as a delimiter. If you wanted a literal %
sign in a batch file, e.g. in an echo
statement, you needed to double it.
This carried over to Windows NT which allowed environment variables on the command line, however for backwards compatibility you still need to double your %
signs in a .cmd file.
If you are new to React JS and using create-react-app cli command to create the application, then run the following NPM command to include the latest version of font-awesome.
npm install --save font-awesome
import font-awesome to your index.js file. Just add below line to your index.js file
import '../node_modules/font-awesome/css/font-awesome.min.css';
or
import 'font-awesome/css/font-awesome.min.css';
Don't forget to use className as attribute
render: function() {
return <div><i className="fa fa-spinner fa-spin">no spinner but why</i></div>;
}
C++ treats variables of user-defined types with value semantics. This means that objects are implicitly copied in various contexts, and we should understand what "copying an object" actually means.
Let us consider a simple example:
class person
{
std::string name;
int age;
public:
person(const std::string& name, int age) : name(name), age(age)
{
}
};
int main()
{
person a("Bjarne Stroustrup", 60);
person b(a); // What happens here?
b = a; // And here?
}
(If you are puzzled by the name(name), age(age)
part,
this is called a member initializer list.)
What does it mean to copy a person
object?
The main
function shows two distinct copying scenarios.
The initialization person b(a);
is performed by the copy constructor.
Its job is to construct a fresh object based on the state of an existing object.
The assignment b = a
is performed by the copy assignment operator.
Its job is generally a little more complicated,
because the target object is already in some valid state that needs to be dealt with.
Since we declared neither the copy constructor nor the assignment operator (nor the destructor) ourselves, these are implicitly defined for us. Quote from the standard:
The [...] copy constructor and copy assignment operator, [...] and destructor are special member functions. [ Note: The implementation will implicitly declare these member functions for some class types when the program does not explicitly declare them. The implementation will implicitly define them if they are used. [...] end note ] [n3126.pdf section 12 §1]
By default, copying an object means copying its members:
The implicitly-defined copy constructor for a non-union class X performs a memberwise copy of its subobjects. [n3126.pdf section 12.8 §16]
The implicitly-defined copy assignment operator for a non-union class X performs memberwise copy assignment of its subobjects. [n3126.pdf section 12.8 §30]
The implicitly-defined special member functions for person
look like this:
// 1. copy constructor
person(const person& that) : name(that.name), age(that.age)
{
}
// 2. copy assignment operator
person& operator=(const person& that)
{
name = that.name;
age = that.age;
return *this;
}
// 3. destructor
~person()
{
}
Memberwise copying is exactly what we want in this case:
name
and age
are copied, so we get a self-contained, independent person
object.
The implicitly-defined destructor is always empty.
This is also fine in this case since we did not acquire any resources in the constructor.
The members' destructors are implicitly called after the person
destructor is finished:
After executing the body of the destructor and destroying any automatic objects allocated within the body, a destructor for class X calls the destructors for X's direct [...] members [n3126.pdf 12.4 §6]
So when should we declare those special member functions explicitly? When our class manages a resource, that is, when an object of the class is responsible for that resource. That usually means the resource is acquired in the constructor (or passed into the constructor) and released in the destructor.
Let us go back in time to pre-standard C++.
There was no such thing as std::string
, and programmers were in love with pointers.
The person
class might have looked like this:
class person
{
char* name;
int age;
public:
// the constructor acquires a resource:
// in this case, dynamic memory obtained via new[]
person(const char* the_name, int the_age)
{
name = new char[strlen(the_name) + 1];
strcpy(name, the_name);
age = the_age;
}
// the destructor must release this resource via delete[]
~person()
{
delete[] name;
}
};
Even today, people still write classes in this style and get into trouble:
"I pushed a person into a vector and now I get crazy memory errors!"
Remember that by default, copying an object means copying its members,
but copying the name
member merely copies a pointer, not the character array it points to!
This has several unpleasant effects:
a
can be observed via b
.b
is destroyed, a.name
is a dangling pointer.a
is destroyed, deleting the dangling pointer yields undefined behavior.name
pointed to before the assignment,
sooner or later you will get memory leaks all over the place.Since memberwise copying does not have the desired effect, we must define the copy constructor and the copy assignment operator explicitly to make deep copies of the character array:
// 1. copy constructor
person(const person& that)
{
name = new char[strlen(that.name) + 1];
strcpy(name, that.name);
age = that.age;
}
// 2. copy assignment operator
person& operator=(const person& that)
{
if (this != &that)
{
delete[] name;
// This is a dangerous point in the flow of execution!
// We have temporarily invalidated the class invariants,
// and the next statement might throw an exception,
// leaving the object in an invalid state :(
name = new char[strlen(that.name) + 1];
strcpy(name, that.name);
age = that.age;
}
return *this;
}
Note the difference between initialization and assignment:
we must tear down the old state before assigning to name
to prevent memory leaks.
Also, we have to protect against self-assignment of the form x = x
.
Without that check, delete[] name
would delete the array containing the source string,
because when you write x = x
, both this->name
and that.name
contain the same pointer.
Unfortunately, this solution will fail if new char[...]
throws an exception due to memory exhaustion.
One possible solution is to introduce a local variable and reorder the statements:
// 2. copy assignment operator
person& operator=(const person& that)
{
char* local_name = new char[strlen(that.name) + 1];
// If the above statement throws,
// the object is still in the same state as before.
// None of the following statements will throw an exception :)
strcpy(local_name, that.name);
delete[] name;
name = local_name;
age = that.age;
return *this;
}
This also takes care of self-assignment without an explicit check. An even more robust solution to this problem is the copy-and-swap idiom, but I will not go into the details of exception safety here. I only mentioned exceptions to make the following point: Writing classes that manage resources is hard.
Some resources cannot or should not be copied, such as file handles or mutexes.
In that case, simply declare the copy constructor and copy assignment operator as private
without giving a definition:
private:
person(const person& that);
person& operator=(const person& that);
Alternatively, you can inherit from boost::noncopyable
or declare them as deleted (in C++11 and above):
person(const person& that) = delete;
person& operator=(const person& that) = delete;
Sometimes you need to implement a class that manages a resource. (Never manage multiple resources in a single class, this will only lead to pain.) In that case, remember the rule of three:
If you need to explicitly declare either the destructor, copy constructor or copy assignment operator yourself, you probably need to explicitly declare all three of them.
(Unfortunately, this "rule" is not enforced by the C++ standard or any compiler I am aware of.)
From C++11 on, an object has 2 extra special member functions: the move constructor and move assignment. The rule of five states to implement these functions as well.
An example with the signatures:
class person
{
std::string name;
int age;
public:
person(const std::string& name, int age); // Ctor
person(const person &) = default; // 1/5: Copy Ctor
person(person &&) noexcept = default; // 4/5: Move Ctor
person& operator=(const person &) = default; // 2/5: Copy Assignment
person& operator=(person &&) noexcept = default; // 5/5: Move Assignment
~person() noexcept = default; // 3/5: Dtor
};
The rule of 3/5 is also referred to as the rule of 0/3/5. The zero part of the rule states that you are allowed to not write any of the special member functions when creating your class.
Most of the time, you do not need to manage a resource yourself,
because an existing class such as std::string
already does it for you.
Just compare the simple code using a std::string
member
to the convoluted and error-prone alternative using a char*
and you should be convinced.
As long as you stay away from raw pointer members, the rule of three is unlikely to concern your own code.
I've started using static classes when I wish to use functions, rather than classes, as my unit of reuse. Previously, I was all about the evil of static classes. However, learning F# has made me see them in a new light.
What do I mean by this? Well, say when working up some super DRY code, I end up with a bunch of one-method classes. I may just pull these methods into a static class and then inject them into dependencies using a delegate. This also plays nicely with my dependency injection (DI) container of choice Autofac.
Of course taking a direct dependency on a static method is still usually evil (there are some non-evil uses).
You cannot target text nodes with CSS. I'm with you; I wish you could... but you can't :(
If you don't wrap the text node in a <span>
like @Jacob suggests, you could instead give the surrounding element padding
as opposed to margin
:
<p id="theParagraph">The text node!</p>
p#theParagraph
{
border: 1px solid red;
padding-bottom: 10px;
}
You can use vertical-align
to move items vertically.
Example:
<div>This is an <span style="vertical-align: -20px;">example</span></div>
This will move the span containing the word 'example' downwards 20 pixels compared to the rest of the text.
The intended use for this property is to align elements of different height (e.g. images with different sizes) along a set line. vertical-align: top
will for instance align all images on a line with the top of each image aligning with each other. vertical-align: middle
will align all images so that the middle of the images align with each other, regardless of the height of each image.
You can see visual examples in this CodePen by Chris Coyier.
Hope that helps!
For Nginx:
openssl req -newkey rsa:2048 -nodes -keyout domain.com.key -out domain.com.csr
SSL file domain_com.crt
and domain_com.ca-bundle
files, then copy new file in paste domain.com.chained.crt
.
3: Add nginx files:
ssl_certificate /home/user/domain_ssl/domain.com.chained.crt;
ssl_certificate_key /home/user/domain_ssl/domain.com.key;
Lates restart Nginx.
Don't lose time. Search for it in the registry:
reg query "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Environment"
returns less than the SET command.
Basic:
ng g module chat
ng g service chat/chat -m chat
ng g component chat/chat-dialog -m chat
In chat.module.ts:
exports: [ChatDialogComponent],
providers: [ChatService]
In app.module.ts:
imports: [
BrowserModule,
ChatModule
]
Now in app.component.html:
<chat-dialog></chat-dialog>
LAZY LOADING:
ng g module pages --module app.module --route pages
CREATE src/app/pages/pages-routing.module.ts (340 bytes)
CREATE src/app/pages/pages.module.ts (342 bytes)
CREATE src/app/pages/pages.component.css (0 bytes)
CREATE src/app/pages/pages.component.html (20 bytes)
CREATE src/app/pages/pages.component.spec.ts (621 bytes)
CREATE src/app/pages/pages.component.ts (271 bytes)
UPDATE src/app/app-routing.module.ts (8611 bytes)
ng g module pages/forms --module pages/pages.module --route forms
CREATE src/app/forms/forms-routing.module.ts (340 bytes)
CREATE src/app/forms/forms.module.ts (342 bytes)
CREATE src/app/forms/forms.component.css (0 bytes)
CREATE src/app/forms/forms.component.html (20 bytes)
CREATE src/app/forms/forms.component.spec.ts (621 bytes)
CREATE src/app/forms/forms.component.ts (271 bytes)
UPDATE src/app/pages/pages-routing.module.ts (437 bytes)
This is the way JNA solves this with Platform.is64Bit()
(https://github.com/java-native-access/jna/blob/master/src/com/sun/jna/Platform.java)
public static final boolean is64Bit() {
String model = System.getProperty("sun.arch.data.model",
System.getProperty("com.ibm.vm.bitmode"));
if (model != null) {
return "64".equals(model);
}
if ("x86-64".equals(ARCH)
|| "ia64".equals(ARCH)
|| "ppc64".equals(ARCH) || "ppc64le".equals(ARCH)
|| "sparcv9".equals(ARCH)
|| "mips64".equals(ARCH) || "mips64el".equals(ARCH)
|| "amd64".equals(ARCH)
|| "aarch64".equals(ARCH)) {
return true;
}
return Native.POINTER_SIZE == 8;
}
ARCH = getCanonicalArchitecture(System.getProperty("os.arch"), osType);
static String getCanonicalArchitecture(String arch, int platform) {
arch = arch.toLowerCase().trim();
if ("powerpc".equals(arch)) {
arch = "ppc";
}
else if ("powerpc64".equals(arch)) {
arch = "ppc64";
}
else if ("i386".equals(arch) || "i686".equals(arch)) {
arch = "x86";
}
else if ("x86_64".equals(arch) || "amd64".equals(arch)) {
arch = "x86-64";
}
// Work around OpenJDK mis-reporting os.arch
// https://bugs.openjdk.java.net/browse/JDK-8073139
if ("ppc64".equals(arch) && "little".equals(System.getProperty("sun.cpu.endian"))) {
arch = "ppc64le";
}
// Map arm to armel if the binary is running as softfloat build
if("arm".equals(arch) && platform == Platform.LINUX && isSoftFloat()) {
arch = "armel";
}
return arch;
}
static {
String osName = System.getProperty("os.name");
if (osName.startsWith("Linux")) {
if ("dalvik".equals(System.getProperty("java.vm.name").toLowerCase())) {
osType = ANDROID;
// Native libraries on android must be bundled with the APK
System.setProperty("jna.nounpack", "true");
}
else {
osType = LINUX;
}
}
else if (osName.startsWith("AIX")) {
osType = AIX;
}
else if (osName.startsWith("Mac") || osName.startsWith("Darwin")) {
osType = MAC;
}
else if (osName.startsWith("Windows CE")) {
osType = WINDOWSCE;
}
else if (osName.startsWith("Windows")) {
osType = WINDOWS;
}
else if (osName.startsWith("Solaris") || osName.startsWith("SunOS")) {
osType = SOLARIS;
}
else if (osName.startsWith("FreeBSD")) {
osType = FREEBSD;
}
else if (osName.startsWith("OpenBSD")) {
osType = OPENBSD;
}
else if (osName.equalsIgnoreCase("gnu")) {
osType = GNU;
}
else if (osName.equalsIgnoreCase("gnu/kfreebsd")) {
osType = KFREEBSD;
}
else if (osName.equalsIgnoreCase("netbsd")) {
osType = NETBSD;
}
else {
osType = UNSPECIFIED;
}
}
A Structure of a standerd .gitignore file for Xcode project >
.DS_Store
.DS_Store?
._*
.Spotlight-V100
.Trashes
Icon?
ehthumbs.db
Thumbs.db
build/
*.pbxuser
!default.pbxuser
*.mode1v3
!default.mode1v3
*.mode2v3
!default.mode2v3
*.perspectivev3
!default.perspectivev3
!default.xcworkspace
xcuserdata
profile
*.moved-aside
DerivedData
.idea/
Well, this is really working like a piece of cake for me.
Go to your app's info.plist
.
View controller-based status bar appearance
to NO
Status bar style
to UIStatusBarStyleLightContent
Then go to your app's delegate and paste in the following code where you set your windows's RootViewController.
#define SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending)
if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0"))
{
UIView *view=[[UIView alloc] initWithFrame:CGRectMake(0, 0,320, 20)];
view.backgroundColor=[UIColor colorWithRed:0/255.0 green:0/255.0 blue:0/255.0 alpha:1.0];
[self.window.rootViewController.view addSubview:view];
}
Bingo. It's working for me.
as suggested here solving the famous LazyInitializationException is one of the following methods:
(1) Use Hibernate.initialize
Hibernate.initialize(topics.getComments());
(2) Use JOIN FETCH
You can use the JOIN FETCH syntax in your JPQL to explicitly fetch the child collection out. This is somehow like EAGER fetching.
(3) Use OpenSessionInViewFilter
LazyInitializationException often occurs in the view layer. If you use Spring framework, you can use OpenSessionInViewFilter. However, I do not suggest you to do so. It may leads to a performance issue if not used correctly.
You are attempting to add one more new commits into your local branch while your working directory is not clean. As a result, Git is refusing to do the pull. Consider the following diagrams to better visualize the scenario:
remote: A <- B <- C <- D
local: A <- B*
(*indicates that you have several files which have been modified but not committed.)
There are two options for dealing with this situation. You can either discard the changes in your files, or retain them.
Option one: Throw away the changes
You can either use git checkout
for each unmerged file, or you can use git reset --hard HEAD
to reset all files in your branch to HEAD. By the way, HEAD in your local branch is B, without an asterisk. If you choose this option, the diagram becomes:
remote: A <- B <- C <- D
local: A <- B
Now when you pull, you can fast-forward your branch with the changes from master. After pulling, you branch would look like master:
local: A <- B <- C <- D
Option two: Retain the changes
If you want to keep the changes, you will first want to resolve any merge conflicts in each of the files. You can open each file in your IDE and look for the following symbols:
<<<<<<< HEAD
// your version of the code
=======
// the remote's version of the code
>>>>>>>
Git is presenting you with two versions of code. The code contained within the HEAD markers is the version from your current local branch. The other version is what is coming from the remote. Once you have chosen a version of the code (and removed the other code along with the markers), you can add each file to your staging area by typing git add
. The final step is to commit your result by typing git commit -m
with an appropriate message. At this point, our diagram looks like this:
remote: A <- B <- C <- D
local: A <- B <- C'
Here I have labelled the commit we just made as C' because it is different from the commit C on the remote. Now, if you try to pull you will get a non-fast forward error. Git cannot play the changes in remote on your branch, because both your branch and the remote have diverged from the common ancestor commit B. At this point, if you want to pull you can either do another git merge
, or git rebase
your branch on the remote.
Getting a mastery of Git requires being able to understand and manipulate uni-directional linked lists. I hope this explanation will get you thinking in the right direction about using Git.
I don't like my switch
statements to fall through - it's far too error prone and hard to read. The only exception is when multiple case
statements all do exactly the same thing.
If there is some common code that multiple branches of a switch statement want to use, I extract that into a separate common function that can be called in any branch.
I am building on what Jorge recommended. Goto File->Settings->compiler.
Here you will see a field to add compiler options where you plug in --stacktrace
By overriding Equals you're basically stating that you are the one who knows better how to compare two instances of a given type, so you're likely to be the best candidate to provide the best hash code.
This is an example of how ReSharper writes a GetHashCode() function for you:
public override int GetHashCode()
{
unchecked
{
var result = 0;
result = (result * 397) ^ m_someVar1;
result = (result * 397) ^ m_someVar2;
result = (result * 397) ^ m_someVar3;
result = (result * 397) ^ m_someVar4;
return result;
}
}
As you can see it just tries to guess a good hash code based on all the fields in the class, but since you know your object's domain or value ranges you could still provide a better one.
If you only want to develop a single web service and have it hosted on many different endpoints (i.e. SOAP + REST, with XML, JSON, CSV, HTML outputes). You should also consider using ServiceStack which I've built for exactly this purpose where every service you develop is automatically available on on both SOAP and REST endpoints out-of-the-box without any configuration required.
The Hello World example shows how to create a simple with service with just (no config required):
public class Hello {
public string Name { get; set; }
}
public class HelloResponse {
public string Result { get; set; }
}
public class HelloService : IService
{
public object Any(Hello request)
{
return new HelloResponse { Result = "Hello, " + request.Name };
}
}
No other configuration is required, and this service is immediately available with REST in:
It also comes in-built with a friendly HTML output (when called with a HTTP client that has Accept:text/html e.g a browser) so you're able to better visualize the output of your services.
Handling different REST verbs are also as trivial, here's a complete REST-service CRUD app in 1 page of C# (less than it would take to configure WCF ;):
You can't do it at all, let alone quickly. Arrays in Java are fixed size. Two things you could do are:
You can use System.arraycopy
for either of these. Both of these are O(n), since they copy all but 1 element.
If you will be removing the first element often, consider using LinkedList
instead. You can use LinkedList.remove
, which is from the Queue
interface, for convenience. With LinkedList
, removing the first element is O(1). In fact, removing any element is O(1) once you have a ListIterator
to that position. However, accessing an arbitrary element by index is O(n).
Create "regular expression to detect empty string", and then inverse it. Invesion of regular language is the regular language. I think regular expression library in what you leverage - should support it, but if not you always can write your own library.
grep --invert-match
Set objHTTP = CreateObject("MSXML2.ServerXMLHTTP")
URL = "http://www.somedomain.com"
objHTTP.Open "POST", URL, False
objHTTP.setRequestHeader "User-Agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)"
objHTTP.send("")
Alternatively, for greater control over the HTTP request you can use WinHttp.WinHttpRequest.5.1
in place of MSXML2.ServerXMLHTTP
.
The ES6 way of require is import
. You can export
your class and import it somewhere else using import { ClassName } from 'path/to/ClassName'
syntax.
import fs from 'fs';
export default class Animal {
constructor(name){
this.name = name ;
}
print(){
console.log('Name is :'+ this.name);
}
}
import Animal from 'path/to/Animal.js';
Small enhancement to perfectly valid @hmjd's answer: you can use following syntax:
class A {
final Set<String> strings = new HashSet<>() {{
add("val1");
add("val2");
}};
// ...
if (strings.contains(str.toLowerCase())) {
}
// ...
}
It allows you to initialize you Set
in-place.
I find the following function sufficient:
'
' Round Up to the given number of digits
'
Function RoundUp(x As Double, digits As Integer) As Double
If x = Round(x, digits) Then
RoundUp = x
Else
RoundUp = Round(x + 0.5 / (10 ^ digits), digits)
End If
End Function
You can instantiate 2 Node.js servers - one for HTTP and HTTPS
You can also define a setup function that both servers will execute, so that you don't have to write much duplicated code.
Here's the way I did it: (using restify.js, but should work for express.js, or node itself too)
http://qugstart.com/blog/node-js/node-js-restify-server-with-both-http-and-https/
If this is for a script, you can use:
git fetch
$(git rev-parse HEAD) == $(git rev-parse @{u})
(Note: the benefit of this vs. previous answers is that you don't need a separate command to get the current branch name. "HEAD" and "@{u}" (the current branch's upstream) take care of it. See "git rev-parse --help" for more details.)
Try this:
window.open(url, '_blank');
This will open in new tab (if your code is synchronous and in this case it is. in other case it would open a window)
After data-binding, do this:
ddlColor.Items.Insert(0, new ListItem("Select","NA")); //updated code
Or follow Brian's second suggestion if you want to do it in markup.
You should probably add a RequiredFieldValidator control and set its InitialValue to "NA".
<asp:RequiredFieldValidator .. ControlToValidate="ddlColor" InitialValue="NA" />
I recently installed Curl on PHP5 for Windows Vista. I did not enable the CURL library when I initially installed PHP5, so nothing about Curl was showing up in phpinfo() or php.ini.
I installed CURL by re-running the PHP5 installer (php-5.2.8-win32-installer.msi for me) and choosing "Change". Then, I added the CURL component. Restart Apache, and CURL should work. CURL will show up in phpinfo(). Also, here is a sample script you can run to verify it works. It displays an RSS feed from Google:
<?php
error_reporting(E_ALL);
ini_set('display_errors', '1');
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,
'http://news.google.com/news?hl=en&topic=t&output=rss');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$contents = curl_exec ($ch);
echo $contents;
curl_close ($ch);
?>
It follows the convention that static methods should be thread-safe, but actually in v2 that static api is a proxy to an instance method on a default instance: in the case protobuf-net, it internally minimises contention points, and synchronises the internal state when necessary. Basically the library goes out of its way to do things right so that you can have simple code.
puts 'abcdefg'.start_with?('abc') #=> true
[edit] This is something I didn't know before this question: start_with
takes multiple arguments.
'abcdefg'.start_with?( 'xyz', 'opq', 'ab')
You can write this in a more compact way:
var now = new Date();
now.setTime(now.getTime() + 1 * 3600 * 1000);
document.cookie = "name=value; expires=" + now.toUTCString() + "; path=/";
And for someone like me, who wasted an hour trying to figure out why the cookie with expiration is not set up (but without expiration can be set up) in Chrome, here is in answer:
For some strange reason Chrome team decided to ignore cookies from local pages. So if you do this on localhost, you will not be able to see your cookie in Chrome. So either upload it on the server or use another browser.
Martijn's method as a prototype function:
String.prototype.escape = function() {
var tagsToReplace = {
'&': '&',
'<': '<',
'>': '>'
};
return this.replace(/[&<>]/g, function(tag) {
return tagsToReplace[tag] || tag;
});
};
var a = "<abc>";
var b = a.escape(); // "<abc>"
You will need to have some access to the Form's Instance to access its Controls
collection and thereby changing the Text Box's
Text.
One of ways could be that You can have a Your Form's Instance Available as Public or More better Create a new Constructor For your Second Form and have it receive the Form1's instance during initialization.
Do you need to decode all encoded HTML entities or just &
itself?
If you only need to handle &
then you can do this:
var decoded = encoded.replace(/&/g, '&');
If you need to decode all HTML entities then you can do it without jQuery:
var elem = document.createElement('textarea');
elem.innerHTML = encoded;
var decoded = elem.value;
Please take note of Mark's comments below which highlight security holes in an earlier version of this answer and recommend using textarea
rather than div
to mitigate against potential XSS vulnerabilities. These vulnerabilities exist whether you use jQuery or plain JavaScript.
You want:
DECLARE @times int
SELECT @times = COUNT(DidWin)
FROM thetable
WHERE DidWin = 1 AND Playername='Me'
You also don't need the 'as' clause.
(new Date()).toLocaleString()
Will output the date and time using your local format. For example: "5/1/2020, 10:35:41 AM"
CURL method is very popular so yes it is good to use it. You could also explain more those codes with some extra comments because starters could understand them.
SELECT word FROM table WHERE word NOT LIKE '%a%'
AND word NOT LIKE '%b%'
AND word NOT LIKE '%c%';
synchronized(list) {
for (Object o : list) {}
}
adapter.notifyDataSetChanged();
As others have pointed out setInterval and setTimeout will do the trick. I wanted to highlight a bit more advanced technique that I learned from this excellent video by Paul Irish: http://paulirish.com/2010/10-things-i-learned-from-the-jquery-source/
For periodic tasks that might end up taking longer than the repeat interval (like an HTTP request on a slow connection) it's best not to use setInterval()
. If the first request hasn't completed and you start another one, you could end up in a situation where you have multiple requests that consume shared resources and starve each other. You can avoid this problem by waiting to schedule the next request until the last one has completed:
// Use a named immediately-invoked function expression.
(function worker() {
$.get('ajax/test.html', function(data) {
// Now that we've completed the request schedule the next one.
$('.result').html(data);
setTimeout(worker, 5000);
});
})();
For simplicity I used the success callback for scheduling. The down side of this is one failed request will stop updates. To avoid this you could use the complete callback instead:
(function worker() {
$.ajax({
url: 'ajax/test.html',
success: function(data) {
$('.result').html(data);
},
complete: function() {
// Schedule the next request when the current one's complete
setTimeout(worker, 5000);
}
});
})();
Good news everyone some people! Newer browsers will trigger a window resize event when the zoom is changed.
Now it is possible to install openjdk-11 this way:
sudo apt-get install openjdk-11-jdk
(Previously it installed openjdk-10, but not anymore)
Escape the apostrophe in O'Neal
by writing O''Neal
(two apostrophes).
I ran into this issue when trying to build an executable jar with maven in intellij 12. It turned out that because the java manifest file didn't include a class path the log4j properties file couldn't be found at the root level (where the jar file was executed from.)
FYI I was getting the logger like this:
Logger log = LogManager.getLogger(MyClassIWantedToLogFrom.class);
And I was able to get it to work with a pom file that included this:
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.2-beta-5</version>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<mainClass>com.mycompany.mainPackage.mainClass</mainClass>
</manifest>
<manifestEntries>
<Class-Path>.</Class-Path> <!-- need to add current directory to classpath properties files can be found -->
</manifestEntries>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
<executions>
<execution>
<id>make-assembly</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
always use with statement like ;WITH
then you'll never get this error. The WITH command required a ;
between it and any previous command, by always using ;WITH
you'll never have to remember to do this.
see WITH common_table_expression (Transact-SQL), from the section Guidelines for Creating and Using Common Table Expressions:
When a CTE is used in a statement that is part of a batch, the statement before it must be followed by a semicolon.
I just use this solution in Kotlin:
var date : String = DateFormat.format("EEEE dd-MMM-yyyy HH:mm a" , Date()) as String
Building upon busylee's answer, this is how you can make a drawable
that only has one unrounded corner (top-left, in this example):
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape android:shape="rectangle">
<solid android:color="@color/white" />
<!-- A numeric value is specified in "radius" for demonstrative purposes only,
it should be @dimen/val_name -->
<corners android:radius="10dp" />
</shape>
</item>
<!-- To keep the TOP-LEFT corner UNROUNDED set both OPPOSITE offsets (bottom+right): -->
<item
android:bottom="10dp"
android:right="10dp">
<shape android:shape="rectangle">
<solid android:color="@color/white" />
</shape>
</item>
</layer-list>
Please note that the above drawable
is not shown correctly in the Android Studio preview (2.0.0p7). To preview it anyway, create another view and use this as android:background="@drawable/..."
.
Also on OS X (El Capitan), been having this same issue all morning.
I was running the command "npm install -g grunt-cli" command from within a directory where my project was.
I tried again from my home directory (i.e. 'cd ~') and it installed as before, except now I can run the grunt command and it is recognised.
I also use Stefan Petre’s http://www.eyecon.ro/bootstrap-datepicker and it does not work with Bootstrap 3 without modification. Note that http://eternicode.github.io/bootstrap-datepicker/ is a fork of Stefan Petre's code.
You have to change your markup (the sample markup will not work) to use the new CSS and form grid layout in Bootstrap 3. Also, you have to modify some CSS and JavaScript in the actual bootstrap-datepicker implementation.
Here is my solution:
<div class="form-group row">
<div class="col-xs-8">
<label class="control-label">My Label</label>
<div class="input-group date" id="dp3" data-date="12-02-2012" data-date-format="mm-dd-yyyy">
<input class="form-control" type="text" readonly="" value="12-02-2012">
<span class="input-group-addon"><i class="glyphicon glyphicon-calendar"></i></span>
</div>
</div>
</div>
CSS changes in datepicker.css on lines 176-177:
.input-group.date .input-group-addon i,
.input-group.date .input-group-addon i {
Javascript change in datepicker-bootstrap.js on line 34:
this.component = this.element.is('.date') ? this.element.find('.input-group-addon') : false;
UPDATE
Using the newer code from http://eternicode.github.io/bootstrap-datepicker/ the changes are as follows:
CSS changes in datepicker.css on lines 446-447:
.input-group.date .input-group-addon i,
.input-group.date .input-group-addon i {
Javascript change in datepicker-bootstrap.js on line 46:
this.component = this.element.is('.date') ? this.element.find('.input-group-addon, .btn') : false;
Finally, the JavaScript to enable the datepicker (with some options):
$(".input-group.date").datepicker({ autoclose: true, todayHighlight: true });
Tested with Bootstrap 3.0 and JQuery 1.9.1. Note that this fork is better to use than the other as it is more feature rich, has localization support and auto-positions the datepicker based on the control position and window size, avoiding the picker going off the screen which was a problem with the older version.
This Works for me in PySpark
df.select("column").collect()[0][0]
If you know the aspect ratio for example, if your image is square you can set either the height
or the width
to fill the container and get the other to be set by the aspectRatio
property
Here is the style if you want the height
be set automatically:
{
width: '100%',
height: undefined,
aspectRatio: 1,
}
Note: height
must be undefined
JavaScript that allows for syntax checking
JSHint-Eclipse
and autosuggestions for .js files in Eclipse?
http://www.nodeclipse.org/updates/anide/
As Nodeclipse lead, I am always looking for what is available in Eclipse ecosystem. Nodeclipse site has even more links, and I am inviting to collaborate on the JavaScript tools on GitHub
Just reorder or make sure, the (DOM or HTML) is loaded before the JavaScript.
SELECT UPPER(firstname) FROM Person
SELECT LOWER(firstname) FROM Person
This worked for me:
$.validator.messages.required = 'required';
On Linux, and Unix in general, "r"
and "rb"
are the same. More specifically, a FILE
pointer obtained by fopen()
ing a file in in text mode and in binary mode behaves the same way on Unixes. On windows, and in general, on systems that use more than one character to represent "newlines", a file opened in text mode behaves as if all those characters are just one character, '\n'
.
If you want to portably read/write text files on any system, use "r"
, and "w"
in fopen()
. That will guarantee that the files are written and read properly. If you are opening a binary file, use "rb"
and "wb"
, so that an unfortunate newline-translation doesn't mess your data.
Note that a consequence of the underlying system doing the newline translation for you is that you can't determine the number of bytes you can read from a file using fseek(file, 0, SEEK_END).
Finally, see What's the difference between text and binary I/O? on comp.lang.c FAQs.
navigationItem.leftBarButtonItem = nil
navigationItem.hidesBackButton = true
if you use this code block inside didLoad or loadView worked but not worked perfectly.If you look carefully you can see back button is hiding when your view load.Look's weird.
What is the perfect solution?
Add BarButtonItem component from componentView (Command + Shift + L) to your target viewControllers navigation bar.
Select BarButtonItem set Title = " " from right panel
Remove onsubmit
from the form
tag. Change this:
<input type="submit" value="submit" />
To:
<input type="submit" value="submit" name='btnSub' />
And write this:
if(isset($_POST['btnSub']))
echo "<script>window.close();</script>";
For me below worked:
Step 1: Downloaded and installed the web Installer exe from https://www.microsoft.com/en-us/download/details.aspx?id=48137 on the application server. Rebooted the application server after installation was completed.
Step 2: Added below changes in the web.config
<system.web>
<compilation targetFramework="4.6"/> <!-- Changed framework 4.0 to 4.6 -->
<!--Added this httpRuntime -->
<httpRuntime targetFramework="4.6" />
</system.web>
Step 3: After completing step 1 and 2, it gave an error, "WebForms UnobtrusiveValidationMode requires a ScriptResourceMapping for 'jquery'. Please add a ScriptResourceMapping named jquery(case-sensitive)" and to resolve this error, I added below key in appsettings in my web.config file
<appSettings>
<add key="ValidationSettings:UnobtrusiveValidationMode" value="None" />
</appSettings>
if you need it in rails you can use first (source code)
'1234567890'.first(5) # => "12345"
there is also last (source code)
'1234567890'.last(2) # => "90"
alternatively check from/to (source code):
"hello".from(1).to(-2) # => "ell"
It can even be made dependent to another attribute changes. like this:
$('.classA').toggleClass('classB', $('input').prop('disabled'));
In this case, classB
are added each time the input is disabled
You just need to get the JSONArray
and iterate the JSONObject
inside the Array using a loop though in your case its only one JSONObject but you may have more.
JSONArray mArray;
try {
mArray = new JSONArray(responseString);
for (int i = 0; i < mArray.length(); i++) {
JSONObject mJsonObject = mArray.getJSONObject(i);
Log.d("OutPut", mJsonObject.getString("NeededString"));
}
} catch (JSONException e) {
e.printStackTrace();
}
Use stri_sub
function from stringi
package.
To get substring from the end, use negative numbers.
Look below for the examples:
stri_sub("abcde",1,3)
[1] "abc"
stri_sub("abcde",1,1)
[1] "a"
stri_sub("abcde",-3,-1)
[1] "cde"
You can install this package from github: https://github.com/Rexamine/stringi
It is available on CRAN now, simply type
install.packages("stringi")
to install this package.
change the div to display block
.topbar{
display:block;
width:100%;
height:70px;
background-color:#475;
overflow:scroll;
}
i made a jsfiddle example here please check
>>> for i, s in enumerate(S):
(I'm quite surprised such a fundamental question is not resolved correctly and neatly for years...)
In short, both concurrency and parallelism are properties of computing.
As of the difference, here is the explanation from Robert Harper:
The first thing to understand is parallelism has nothing to do with concurrency. Concurrency is concerned with nondeterministic composition of programs (or their components). Parallelism is concerned with asymptotic efficiency of programs with deterministic behavior. Concurrency is all about managing the unmanageable: events arrive for reasons beyond our control, and we must respond to them. A user clicks a mouse, the window manager must respond, even though the display is demanding attention. Such situations are inherently nondeterministic, but we also employ pro forma nondeterminism in a deterministic setting by pretending that components signal events in an arbitrary order, and that we must respond to them as they arise. Nondeterministic composition is a powerful program structuring idea. Parallelism, on the other hand, is all about dependencies among the subcomputations of a deterministic computation. The result is not in doubt, but there are many means of achieving it, some more efficient than others. We wish to exploit those opportunities to our advantage.
They can be sorts of orthogonal properties in programs. Read this blog post for additional illustrations. And this one discussed slightly more on difference about components in programming, like threads.
Note that threading or multitasking are all implementations of computing serving more concrete purposes. They can be related to parallelism and concurrency, but not in an essential way. Thus they are hardly good entries to start the explanation.
One more highlight: (physical) "time" has almost nothing to do with the properties discussed here. Time is just a way of implementation of the measurement to show the significance of the properties, but far from the essence. Think twice the role of "time" in time complexity - which is more or less similar, even the measurement is often more significant in that case.
--setup
IF OBJECT_ID('tempdb..#T') IS NOT NULL DROP TABLE #T;
CREATE TABLE #T(ID INT NOT NULL IDENTITY(1,1) PRIMARY KEY, NAME VARCHAR(10))
INSERT INTO #T (Name) VALUES('JOHN'),(''),(NULL);
SELECT * FROM #T
1 JOHN
2 -- is empty string
3 NULL
You can examine ''
as NULL
by converting it to NULL
using NULLIF
--here you set '' to null
UPDATE #T SET NAME = NULLIF(NAME,'')
SELECT * FROM #T
1 JOHN
2 NULL
3 NULL
or you can examine NULL
as ''
using SELECT ISNULL(NULL,'')
-- here you set NULL to ''
UPDATE #T SET NAME = ISNULL(NULL,'') WHERE NAME IS NULL
SELECT * FROM #T
1 JOHN
2 -- is empty string
3 -- is empty string
--clean up
DROP TABLE #T
If you want to remove everything after the last occurrence of separator in a string I find this works well:
<separator>.join(string_to_split.split(<separator>)[:-1])
For example, if string_to_split
is a path like root/location/child/too_far.exe
and you only want the folder path, you can split by "/".join(string_to_split.split("/")[:-1])
and you'll get
root/location/child
Very much a porcelain command, not good if you want this for scripting:
git branch -vv # doubly verbose!
Note that with git 1.8.3, that upstream branch is displayed in blue (see "What is this branch tracking (if anything) in git?")
If you want clean output, see arcresu's answer - it uses a porcelain command that I don't believe existed at the time I originally wrote this answer, so it's a bit more concise and works with branches configured for rebase, not just merge.
One correct way to get selected value would be
var selected_value = $('#fruit_name').val()
And then you should do
if(selected_value) { ... }