Programs & Examples On #Webcontext

The entity type <type> is not part of the model for the current context

For me the issue was that I had not included the Entity Class within my db set inside the context for entity framework.

public DbSet<ModelName> ModelName { get; set; }

Failed to load ApplicationContext for JUnit test of Spring controller

There can be multiple root causes for this exception. For me, my mockMvc wasn't getting auto-configured. I solved this exception by using @WebMvcTest(MyController.class) at the class level. This annotation will disable full auto-configuration and instead apply only configuration relevant to MVC tests.

An alternative to this is, If you are looking to load your full application configuration and use MockMVC, you should consider @SpringBootTest combined with @AutoConfigureMockMvc rather than @WebMvcTest

Invalid length for a Base-64 char array

My guess is that you simply need to URL-encode your Base64 string when you include it in the querystring.

Base64 encoding uses some characters which must be encoded if they're part of a querystring (namely + and /, and maybe = too). If the string isn't correctly encoded then you won't be able to decode it successfully at the other end, hence the errors.

You can use the HttpUtility.UrlEncode method to encode your Base64 string:

string msg = "Please click on the link below or paste it into a browser "
             + "to verify your email account.<br /><br /><a href=\""
             + _configuration.RootURL + "Accounts/VerifyEmail.aspx?a="
             + HttpUtility.UrlEncode(userName.Encrypt("verify")) + "\">"
             + _configuration.RootURL + "Accounts/VerifyEmail.aspx?a="
             + HttpUtility.UrlEncode(userName.Encrypt("verify")) + "</a>";

How do I fix certificate errors when running wget on an HTTPS URL in Cygwin?

If you don't care about checking the validity of the certificate just add the --no-check-certificate option on the wget command-line. This worked well for me.

NOTE: This opens you up to man-in-the-middle (MitM) attacks, and is not recommended for anything where you care about security.

Calling remove in foreach loop in Java

Those saying that you can't safely remove an item from a collection except through the Iterator aren't quite correct, you can do it safely using one of the concurrent collections such as ConcurrentHashMap.

Failed to add a service. Service metadata may not be accessible. Make sure your service is running and exposing metadata.`

The property IsOneWay=true may be true in the Operational contract of the interface. Remove that property to get rid of this error.

Append a Lists Contents to another List C#

Here is my example:

    private List<int> m_machinePorts = new List<int>();

    public List<int> machinePorts
    {
        get { return m_machinePorts; }
    }

    Init()
    {
        // Custom function to get available ethernet ports
        List<int> localEnetPorts = _Globals.GetAvailableEthernetPorts();

        // Custome function to get available serial ports
        List<int> localPorts = _Globals.GetAvailableSerialPorts();

        // Build Available port list 
        m_machinePorts.AddRange(localEnetPorts);
        m_machinePorts.AddRange(localPorts);
     }

Most useful NLog configurations

Configure NLog via XML, but Programmatically

What? Did you know that you can specify the NLog XML directly to NLog from your app, as opposed to having NLog read it from the config file? Well, you can. Let's say that you have a distributed app and you want to use the same configuration everywhere. You could keep a config file in each location and maintain it separately, you could maintain one in a central location and push it out to the satellite locations, or you could probably do a lot of other things. Or, you could store your XML in a database, get it at app startup, and configure NLog directly with that XML (maybe checking back periodically to see if it had changed).

  string xml = @"<nlog>
                   <targets>
                     <target name='console' type='Console' layout='${message}' />
                   </targets>

                   <rules>
                     <logger name='*' minlevel='Error' writeTo='console' />
                   </rules>
                 </nlog>";

  StringReader sr = new StringReader(xml);
  XmlReader xr = XmlReader.Create(sr);
  XmlLoggingConfiguration config = new XmlLoggingConfiguration(xr, null);
  LogManager.Configuration = config;
  //NLog is now configured just as if the XML above had been in NLog.config or app.config

  logger.Trace("Hello - Trace"); //Won't log
  logger.Debug("Hello - Debug"); //Won't log
  logger.Info("Hello - Info");   //Won't log
  logger.Warn("Hello - Warn");   //Won't log
  logger.Error("Hello - Error"); //Will log
  logger.Fatal("Hello - Fatal"); //Will log

  //Now let's change the config (the root logging level) ...
  string xml2 = @"<nlog>
                  <targets>
                     <target name='console' type='Console' layout='${message}' />
                   </targets>

                   <rules>
                     <logger name='*' minlevel='Trace' writeTo='console' />
                   </rules>
                 </nlog>";

  StringReader sr2 = new StringReader(xml2);
  XmlReader xr2 = XmlReader.Create(sr2);
  XmlLoggingConfiguration config2 = new XmlLoggingConfiguration(xr2, null);
  LogManager.Configuration = config2;

  logger.Trace("Hello - Trace"); //Will log
  logger.Debug("Hello - Debug"); //Will log
  logger.Info("Hello - Info");   //Will log
  logger.Warn("Hello - Warn");   //Will log
  logger.Error("Hello - Error"); //Will log
  logger.Fatal("Hello - Fatal"); //Will log

I'm not sure how robust this is, but this example provides a useful starting point for people that might want to try configuring like this.

Printing an int list in a single line python3

Try using join on a str conversion of your ints:

print(' '.join(str(x) for x in array))

For python 3.7

powershell mouse move does not prevent idle mode

I created a PS script to check idle time and jiggle the mouse to prevent the screensaver.

There are two parameters you can control how it works.

$checkIntervalInSeconds : the interval in seconds to check if the idle time exceeds the limit

$preventIdleLimitInSeconds : the idle time limit in seconds. If the idle time exceeds the idle time limit, jiggle the mouse to prevent the screensaver

Here we go. Save the script in preventIdle.ps1. For preventing the 4-min screensaver, I set $checkIntervalInSeconds = 30 and $preventIdleLimitInSeconds = 180.

Add-Type @'
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;

namespace PInvoke.Win32 {

    public static class UserInput {

        [DllImport("user32.dll", SetLastError=false)]
        private static extern bool GetLastInputInfo(ref LASTINPUTINFO plii);

        [StructLayout(LayoutKind.Sequential)]
        private struct LASTINPUTINFO {
            public uint cbSize;
            public int dwTime;
        }

        public static DateTime LastInput {
            get {
                DateTime bootTime = DateTime.UtcNow.AddMilliseconds(-Environment.TickCount);
                DateTime lastInput = bootTime.AddMilliseconds(LastInputTicks);
                return lastInput;
            }
        }

        public static TimeSpan IdleTime {
            get {
                return DateTime.UtcNow.Subtract(LastInput);
            }
        }

        public static double IdleSeconds {
            get {
                return IdleTime.TotalSeconds;
            }
        }

        public static int LastInputTicks {
            get {
                LASTINPUTINFO lii = new LASTINPUTINFO();
                lii.cbSize = (uint)Marshal.SizeOf(typeof(LASTINPUTINFO));
                GetLastInputInfo(ref lii);
                return lii.dwTime;
            }
        }
    }
}
'@

Add-Type @'
using System;
using System.Runtime.InteropServices;

namespace MouseMover
{
    public class MouseSimulator
    {
        [DllImport("user32.dll", SetLastError = true)]
        static extern uint SendInput(uint nInputs, ref INPUT pInputs, int cbSize);
        [DllImport("user32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        public static extern bool GetCursorPos(out POINT lpPoint);

        [StructLayout(LayoutKind.Sequential)]
        struct INPUT
        {
            public SendInputEventType type;
            public MouseKeybdhardwareInputUnion mkhi;
        }
        [StructLayout(LayoutKind.Explicit)]
        struct MouseKeybdhardwareInputUnion
        {
            [FieldOffset(0)]
            public MouseInputData mi;

            [FieldOffset(0)]
            public KEYBDINPUT ki;

            [FieldOffset(0)]
            public HARDWAREINPUT hi;
        }
        [StructLayout(LayoutKind.Sequential)]
        struct KEYBDINPUT
        {
            public ushort wVk;
            public ushort wScan;
            public uint dwFlags;
            public uint time;
            public IntPtr dwExtraInfo;
        }
        [StructLayout(LayoutKind.Sequential)]
        struct HARDWAREINPUT
        {
            public int uMsg;
            public short wParamL;
            public short wParamH;
        }
        [StructLayout(LayoutKind.Sequential)]
        public struct POINT
        {
            public int X;
            public int Y;

            public POINT(int x, int y)
            {
                this.X = x;
                this.Y = y;
            }
        }
        struct MouseInputData
        {
            public int dx;
            public int dy;
            public uint mouseData;
            public MouseEventFlags dwFlags;
            public uint time;
            public IntPtr dwExtraInfo;
        }

        [Flags]
        enum MouseEventFlags : uint
        {
            MOUSEEVENTF_MOVE = 0x0001
        }
        enum SendInputEventType : int
        {
            InputMouse
        }
        public static void MoveMouseBy(int x, int y) {
            INPUT mouseInput = new INPUT();
            mouseInput.type = SendInputEventType.InputMouse;
            mouseInput.mkhi.mi.dwFlags = MouseEventFlags.MOUSEEVENTF_MOVE;
            mouseInput.mkhi.mi.dx = x;
            mouseInput.mkhi.mi.dy = y;
            SendInput(1, ref mouseInput, Marshal.SizeOf(mouseInput));
        }
    }
}
'@

$checkIntervalInSeconds = 30
$preventIdleLimitInSeconds = 180

while($True) {
    if (([PInvoke.Win32.UserInput]::IdleSeconds -ge $preventIdleLimitInSeconds)) {
        [MouseMover.MouseSimulator]::MoveMouseBy(10,0)
        [MouseMover.MouseSimulator]::MoveMouseBy(-10,0)
    }
    Start-Sleep -Seconds $checkIntervalInSeconds
}

Then, open Windows PowerShell and run

powershell -ExecutionPolicy ByPass -File C:\SCRIPT-DIRECTORY-PATH\preventIdle.ps1

Not able to install Python packages [SSL: TLSV1_ALERT_PROTOCOL_VERSION]

The answers of installing pip via:

  1. curl https://bootstrap.pypa.io/get-pip.py |sudo python or
  2. curl https://bootstrap.pypa.io/get-pip.py | python

did not work for me as I kept on getting the error:

Could not fetch URL https://pypi.org/simple/pip/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/pip/ (Caused by SSLError("Can't connect to HTTPS URL because the SSL module is not available.",)) - skipping
ERROR: Could not find a version that satisfies the requirement pip (from versions: none)
ERROR: No matching distribution found for pip

I had to install pip manually via:

  1. Go the pip distribution website
  2. Download the tar.gz version
  3. Unpack the file locally and cd into the directory
  4. run python setup.py install

Delete all Duplicate Rows except for One in MySQL?

Editor warning: This solution is computationally inefficient and may bring down your connection for a large table.

NB - You need to do this first on a test copy of your table!

When I did it, I found that unless I also included AND n1.id <> n2.id, it deleted every row in the table.

  1. If you want to keep the row with the lowest id value:

    DELETE n1 FROM names n1, names n2 WHERE n1.id > n2.id AND n1.name = n2.name
    
  2. If you want to keep the row with the highest id value:

    DELETE n1 FROM names n1, names n2 WHERE n1.id < n2.id AND n1.name = n2.name
    

I used this method in MySQL 5.1

Not sure about other versions.


Update: Since people Googling for removing duplicates end up here
Although the OP's question is about DELETE, please be advised that using INSERT and DISTINCT is much faster. For a database with 8 million rows, the below query took 13 minutes, while using DELETE, it took more than 2 hours and yet didn't complete.

INSERT INTO tempTableName(cellId,attributeId,entityRowId,value)
    SELECT DISTINCT cellId,attributeId,entityRowId,value
    FROM tableName;

How to call Stored Procedure in a View?

You would have to script the View like below. You would essentially write the results of your proc to a table var or temp table, then select into the view.

Edit - If you can change your stored procedure to a Table Value function, it would eliminate the step of selecting to a temp table.

**Edit 2 ** - Comments are correct that a sproc cannot be read into a view like I suggested. Instead, convert your proc to a table-value function as mentioned in other posts and select from that:

create view sampleView
as select field1, field2, ... 
from dbo.MyTableValueFunction

I apologize for the confusion

preg_match in JavaScript?

get matched string back or false

function preg_match (regex, str) {
  if (new RegExp(regex).test(str)){
    return regex.exec(str);
  }
  return false;
}

Error You must specify a region when running command aws ecs list-container-instances

I think you need to use for example:

aws ecs list-container-instances --cluster default --region us-east-1

This depends of your region of course.

How can I set the default timezone in node.js?

Another approach which seemed to work for me at least in Linux environment is to run your Node.js application like this:

env TZ='Europe/Amsterdam' node server.js

This should at least ensure that the timezone is correctly set already from the beginning.

How to create radio buttons and checkbox in swift (iOS)?

I made a super simple class to handle this in a Mac application I'm working on. Hopefully, this is helpful to someone

RadioButtonController Class:

class RadioButtonController: NSObject {

var buttonArray : [NSButton] = []
var currentleySelectedButton : NSButton?
var defaultButton : NSButton = NSButton() {
    didSet {
        buttonArrayUpdated(buttonSelected: self.defaultButton)
    }
}

func buttonArrayUpdated(buttonSelected : NSButton) {
    for button in buttonArray {
        if button == buttonSelected {
            currentleySelectedButton = button
            button.state = .on
        } else {
            button.state = .off
        }
    }
}

}

Implementation in View Controller:

class OnboardingDefaultLaunchConfiguration: NSViewController {

let radioButtonController : RadioButtonController = RadioButtonController()
@IBOutlet weak var firstRadioButton: NSButton!
@IBOutlet weak var secondRadioButton: NSButton!

@IBAction func folderRadioButtonSelected(_ sender: Any) {
    radioButtonController.buttonArrayUpdated(buttonSelected: folderGroupRadioButton)
}

@IBAction func fileListRadioButtonSelected(_ sender: Any) {
    radioButtonController.buttonArrayUpdated(buttonSelected: fileListRadioButton)
}

override func viewDidLoad() {
    super.viewDidLoad()
    radioButtonController.buttonArray = [firstRadioButton, secondRadioButton]
    radioButtonController.defaultButton = firstRadioButton
}

}

SQL Server Express 2008 Install Side-by-side w/ SQL 2005 Express Fails

I'am trying to install SQL SERVER developer 2008 R2 alongside SQL SERVER 2005 EXPRESS,

i went to program features, clicked on unistall SQL SERVER 2005 EXPRESS, and only checked, WORKSTATION COMPONENTS, it unistalled: support files, sql mngmt studio

After that installation of sql 2008 r2 developer went ok....

Hopes this helps somebody

sql like operator to get the numbers only

You can use the following to only include valid characters:

SQL

SELECT * FROM @Table
WHERE Col NOT LIKE '%[^0-9.]%'

Results

Col
---------
234.62
6435.23
2

Measure string size in Bytes in php

Further to PhoneixS answer to get the correct length of string in bytes - Since mb_strlen() is slower than strlen(), for the best performance one can check "mbstring.func_overload" ini setting so that mb_strlen() is used only when it is really required:

$content_length = ini_get('mbstring.func_overload') ? mb_strlen($content , '8bit') : strlen($content);

Creating an XmlNode/XmlElement in C# without an XmlDocument?

You may want to look at how you can use the built-in features of .NET to serialize and deserialize an object into XML, rather than creating a ToXML() method on every class that is essentially just a Data Transfer Object.

I have used these techniques successfully on a couple of projects but don’t have the implementation details handy right now. I will try to update my answer with my own examples sometime later.

Here's a couple of examples that Google returned:

XML Serialization in .NET by Venkat Subramaniam http://www.agiledeveloper.com/articles/XMLSerialization.pdf

How to Serialize and Deserialize an object into XML http://www.dotnetfunda.com/articles/article98.aspx

Customize your .NET object XML serialization with .NET XML attributes http://blogs.microsoft.co.il/blogs/rotemb/archive/2008/07/27/customize-your-net-object-xml-serialization-with-net-xml-attributes.aspx

How to format a floating number to fixed width in Python

See Python 3.x format string syntax:

IDLE 3.5.1   
numbers = ['23.23', '.1233', '1', '4.223', '9887.2']

for x in numbers:  
    print('{0: >#016.4f}'. format(float(x)))  

     23.2300
      0.1233
      1.0000
      4.2230
   9887.2000

Android: How to stretch an image to the screen width while maintaining aspect ratio?

This working fine as per my requirement

<ImageView android:id="@+id/imgIssue" android:layout_width="fill_parent" android:layout_height="wrap_content" android:adjustViewBounds="true" android:scaleType="fitXY"/>

How do I block or restrict special characters from input fields with jquery?

$(function(){
      $('input').keyup(function(){
        var input_val = $(this).val();
        var inputRGEX = /^[a-zA-Z0-9]*$/;
        var inputResult = inputRGEX.test(input_val);
          if(!(inputResult))
          {     
            this.value = this.value.replace(/[^a-z0-9\s]/gi, '');
          }
       });
    });

How to set selectedIndex of select element using display text?

Try this:

function SelectAnimal()
{
    var animals = document.getElementById('Animals');
    var animalsToFind = document.getElementById('AnimalToFind');
    // get the options length
    var len = animals.options.length;
    for(i = 0; i < len; i++)
    {
      // check the current option's text if it's the same with the input box
      if (animals.options[i].innerHTML == animalsToFind.value)
      {
         animals.selectedIndex = i;
         break;
      }     
    }
}

how do I query sql for a latest record date for each user

I did somewhat for my application as it:

Below is the query:

select distinct i.userId,i.statusCheck, l.userName from internetstatus 
as i inner join login as l on i.userID=l.userID 
where nowtime in((select max(nowtime) from InternetStatus group by userID));    

Can I hide the HTML5 number input’s spin box?

According to Apple’s user experience coding guide for mobile Safari, you can use the following to display a numeric keyboard in the iPhone browser:

<input type="text" pattern="[0-9]*" />

A pattern of \d* will also work.

Immutable vs Mutable types

Mutable means that it can change/mutate. Immutable the opposite.

Some Python data types are mutable, others not.

Let's find what are the types that fit in each category and see some examples.


Mutable

In Python there are various mutable types:

  • lists

  • dict

  • set

Let's see the following example for lists.

list = [1, 2, 3, 4, 5]

If I do the following to change the first element

list[0] = '!'
#['!', '2', '3', '4', '5']

It works just fine, as lists are mutable.

If we consider that list, that was changed, and assign a variable to it

y = list

And if we change an element from the list such as

list[0] = 'Hello'
#['Hello', '2', '3', '4', '5']

And if one prints y it will give

['Hello', '2', '3', '4', '5']

As both list and y are referring to the same list, and we have changed the list.


Immutable

In some programming languages one can define a constant such as the following

const a = 10

And if one calls, it would give an error

a = 20

However, that doesn't exist in Python.

In Python, however, there are various immutable types:

  • None

  • bool

  • int

  • float

  • str

  • tuple

Let's see the following example for strings.

Taking the string a

a = 'abcd'

We can get the first element with

a[0]
#'a'

If one tries to assign a new value to the element in the first position

a[0] = '!'

It will give an error

'str' object does not support item assignment

When one says += to a string, such as

a += 'e'
#'abcde'

It doesn't give an error, because it is pointing a to a different string.

It would be the same as the following

a = a + 'f'

And not changing the string.

Some Pros and Cons of being immutable

• The space in memory is known from the start. It would not require extra space.

• Usually, it makes things more efficiently. Finding, for example, the len() of a string is much faster, as it is part of the string object.

How to generate a Makefile with source in sub-directories using just one makefile

The reason is that your rule

%.o: %.cpp
       ...

expects the .cpp file to reside in the same directory as the .o your building. Since test.exe in your case depends on build/widgets/apple.o (etc), make is expecting apple.cpp to be build/widgets/apple.cpp.

You can use VPATH to resolve this:

VPATH = src/widgets

BUILDDIR = build/widgets

$(BUILDDIR)/%.o: %.cpp
      ...

When attempting to build "build/widgets/apple.o", make will search for apple.cpp in VPATH. Note that the build rule has to use special variables in order to access the actual filename make finds:

$(BUILDDIR)/%.o: %.cpp
        $(CC) $< -o $@

Where "$<" expands to the path where make located the first dependency.

Also note that this will build all the .o files in build/widgets. If you want to build the binaries in different directories, you can do something like

build/widgets/%.o: %.cpp
        ....

build/ui/%.o: %.cpp
        ....

build/tests/%.o: %.cpp
        ....

I would recommend that you use "canned command sequences" in order to avoid repeating the actual compiler build rule:

define cc-command
$(CC) $(CFLAGS) $< -o $@
endef

You can then have multiple rules like this:

build1/foo.o build1/bar.o: %.o: %.cpp
    $(cc-command)

build2/frotz.o build2/fie.o: %.o: %.cpp
    $(cc-command)

Changing the image source using jQuery

For more information. I try setting src attribute with attr method in jquery for ad image using the syntax for example: $("#myid").attr('src', '/images/sample.gif');

This solution is useful and it works but if changing the path change also the path for image and not working.

I've searching for resolve this issue but not found nothing.

The solution is putting the '\' at the beginning the path: $("#myid").attr('src', '\images/sample.gif');

This trick is very useful for me and I hope it is useful for other.

How do I associate file types with an iPhone application?

To deal with any type of files for my own APP, I use this configuration for CFBundleDocumentTypes:

    <key>CFBundleDocumentTypes</key>
    <array>
        <dict>
            <key>CFBundleTypeName</key>
            <string>IPA</string>
            <key>LSItemContentTypes</key>
            <array>
                <string>public.item</string>
                <string>public.content</string>
                <string>public.data</string>
                <string>public.database</string>
                <string>public.composite-content</string>
                <string>public.contact</string>
                <string>public.archive</string>
                <string>public.url-name</string>
                <string>public.text</string>
                <string>public.plain-text</string>
                <string>public.source-code</string>
                <string>public.executable</string>
                <string>public.script</string>
                <string>public.shell-script</string>
                <string>public.xml</string>
                <string>public.symlink</string>
                <string>org.gnu.gnu-zip-archve</string>
                <string>org.gnu.gnu-tar-archive</string>
                <string>public.image</string>
                <string>public.movie</string>
                <string>public.audiovisual-?content</string>
                <string>public.audio</string>
                <string>public.directory</string>
                <string>public.folder</string>
                <string>com.apple.bundle</string>
                <string>com.apple.package</string>
                <string>com.apple.plugin</string>
                <string>com.apple.application-?bundle</string>
                <string>com.pkware.zip-archive</string>
                <string>public.filename-extension</string>
                <string>public.mime-type</string>
                <string>com.apple.ostype</string>
                <string>com.apple.nspboard-typ</string>
                <string>com.adobe.pdf</string>
                <string>com.adobe.postscript</string>
                <string>com.adobe.encapsulated-?postscript</string>
                <string>com.adobe.photoshop-?image</string>
                <string>com.adobe.illustrator.ai-?image</string>
                <string>com.compuserve.gif</string>
                <string>com.microsoft.word.doc</string>
                <string>com.microsoft.excel.xls</string>
                <string>com.microsoft.powerpoint.?ppt</string>
                <string>com.microsoft.waveform-?audio</string>
                <string>com.microsoft.advanced-?systems-format</string>
                <string>com.microsoft.advanced-?stream-redirector</string>
                <string>com.microsoft.windows-?media-wmv</string>
                <string>com.microsoft.windows-?media-wmp</string>
                <string>com.microsoft.windows-?media-wma</string>
                <string>com.apple.keynote.key</string>
                <string>com.apple.keynote.kth</string>
                <string>com.truevision.tga-image</string>
            </array>
            <key>CFBundleTypeIconFiles</key>
            <array>
                <string>Icon-76@2x</string>
            </array>
        </dict>
    </array>

How to get JavaScript caller function line number? How to get JavaScript caller source URL?

This is how I have done it, I have tested it in both Firefox and Chrome. This makes it possible to check the filename and line number of the place where the function is called from.

logFileAndLineNumber(new Error());

function logFileAndLineNumber(newErr)
{
   if(navigator.userAgent.indexOf("Firefox") != -1)
   {
      var originPath = newErr.stack.split('\n')[0].split("/");
      var fileNameAndLineNumber = originPath[originPath.length - 1].split(">")[0];
      console.log(fileNameAndLineNumber);
   }else if(navigator.userAgent.indexOf("Chrome") != -1)
   {
      var originFile = newErr.stack.split('\n')[1].split('/');
      var fileName = originFile[originFile.length - 1].split(':')[0];
      var lineNumber = originFile[originFile.length - 1].split(':')[1];
      console.log(fileName+" line "+lineNumber);
    }
}

In C++ check if std::vector<string> contains a certain value

You can use std::find as follows:

if (std::find(v.begin(), v.end(), "abc") != v.end())
{
  // Element in vector.
}

To be able to use std::find: include <algorithm>.

How can strip whitespaces in PHP's variable?

This is an old post but the shortest answer is not listed here so I am adding it now

strtr($str,[' '=>'']);

Another common way to "skin this cat" would be to use explode and implode like this

implode('',explode(' ', $str));

Display JSON as HTML

Here's a javasript tool that will convert JSON to XML and vice versa, which should enhance its readability. You could then create a style sheet to color it or do a complete transform to HTML.

http://www.xml.com/pub/a/2006/05/31/converting-between-xml-and-json.html

All inclusive Charset to avoid "java.nio.charset.MalformedInputException: Input length = 1"?

ISO_8859_1 Worked for me! I was reading text file with comma separated values

How to replace string in Groovy

You need to escape the backslash \:

println yourString.replace("\\", "/")

How can I print each command before executing?

set -x is fine.

Another way to print each executed command is to use trap with DEBUG. Put this line at the beginning of your script :

trap 'echo "# $BASH_COMMAND"' DEBUG

You can find a lot of other trap usages here.

How to validate an e-mail address in swift?

There are a lot of right answers here, but many of the "regex" are incomplete and it can happen that an email like: "name@domain" results a valid email, but it is not. Here the complete solution:

extension String {

    var isEmailValid: Bool {
        do {
            let regex = try NSRegularExpression(pattern: "(?:[a-z0-9!#$%\\&'*+/=?\\^_`{|}~-]+(?:\\.[a-z0-9!#$%\\&'*+/=?\\^_`{|}~-]+)*|\"(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21\\x23-\\x5b\\x5d-\\x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])*\")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21-\\x5a\\x53-\\x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])+)\\])", options: .CaseInsensitive)
            return regex.firstMatchInString(self, options: NSMatchingOptions(rawValue: 0), range: NSMakeRange(0, self.characters.count)) != nil
        } catch {
            return false
        }
    }
}

Getting hold of the outer class object from the inner class object

You could (but you shouldn't) use reflection for the job:

import java.lang.reflect.Field;

public class Outer {
    public class Inner {
    }

    public static void main(String[] args) throws Exception {

        // Create the inner instance
        Inner inner = new Outer().new Inner();

        // Get the implicit reference from the inner to the outer instance
        // ... make it accessible, as it has default visibility
        Field field = Inner.class.getDeclaredField("this$0");
        field.setAccessible(true);

        // Dereference and cast it
        Outer outer = (Outer) field.get(inner);
        System.out.println(outer);
    }
}

Of course, the name of the implicit reference is utterly unreliable, so as I said, you shouldn't :-)

How to get year/month/day from a date object?

I am using this which works if you pass it a date obj or js timestamp:

getHumanReadableDate: function(date) {
    if (date instanceof Date) {
         return date.getDate() + "/" + (date.getMonth() + 1) + "/" + date.getFullYear();
    } else if (isFinite(date)) {//timestamp
        var d = new Date();
        d.setTime(date);
        return this.getHumanReadableDate(d);
    }
}

HTTP response code for POST when resource already exists

I don't think you should do this.

The POST is, as you know, to modify the collection and it's used to CREATE a new item. So, if you send the id (I think it's not a good idea), you should modify the collection, i.e., modify the item, but it's confusing.

Use it to add an item, without id. It's the best practice.

If you want to capture an UNIQUE constraint (not the id) you can response 409, as you can do in PUT requests. But not the ID.

HttpListener Access Denied

httpListener.Prefixes.Add("http://*:4444/");

you use "*" so you execute following cmd as admin

netsh http add urlacl url=http://*:4444/ user=username

no use +, must use *, because you spec *:4444~.

https://msdn.microsoft.com/en-us/library/system.net.httplistener.aspx

File to byte[] in Java

If you don't have Java 8, and agree with me that including a massive library to avoid writing a few lines of code is a bad idea:

public static byte[] readBytes(InputStream inputStream) throws IOException {
    byte[] b = new byte[1024];
    ByteArrayOutputStream os = new ByteArrayOutputStream();
    int c;
    while ((c = inputStream.read(b)) != -1) {
        os.write(b, 0, c);
    }
    return os.toByteArray();
}

Caller is responsible for closing the stream.

How to select an option from drop down using Selenium WebDriver C#?

Other way could be this one:

driver.FindElement(By.XPath(".//*[@id='examp']/form/select[1]/option[3]")).Click();

and you can change the index in option[x] changing x by the number of element that you want to select.

I don't know if it is the best way but I hope that help you.

How to make an embedded video not autoplay

A couple of wires are crossed here. The various autoplay settings that you're working with only affect whether the SWF's root timeline starts out paused or not. So if your SWF had a timeline animation, or if it had an embedded video on the root timeline, then these settings would do what you're after.

However, the SWF you're working with almost certainly has only one frame on its timeline, so these settings won't affect playback at all. That one frame contains some flavor of video playback component, which contains ActionScript that controls how the video behaves. To get that player component to start of paused, you'll have to change the settings of the component itself.

Without knowing more about where the content came from it's hard to say more, but when one publishes from Flash, video player components normally include a parameter for whether to autoplay. If your SWF is being published by an application other than Flash (Captivate, I suppose, but I'm not up on that) then your best bet would be to check the settings for that app. Anyway it's not something you can control from the level of the HTML page. (Unless you were talking to the SWF from JavaScript, and for that to work the video component would have to be designed to allow it.)

How can I insert binary file data into a binary SQL field using a simple insert statement?

I believe this would be somewhere close.

INSERT INTO Files
(FileId, FileData)
SELECT 1, * FROM OPENROWSET(BULK N'C:\Image.jpg', SINGLE_BLOB) rs

Something to note, the above runs in SQL Server 2005 and SQL Server 2008 with the data type as varbinary(max). It was not tested with image as data type.

Open Source Javascript PDF viewer

There are some guys at Mozilla working on implementing a PDF reader using HTML5 and JavaScript. It is called pdf.js and one of the developers just made an interesting blog post about the project.

Session unset, or session_destroy?

Unset will destroy a particular session variable whereas session_destroy() will destroy all the session data for that user.

It really depends on your application as to which one you should use. Just keep the above in mind.

unset($_SESSION['name']); // will delete just the name data

session_destroy(); // will delete ALL data associated with that user.

How to set cursor position in EditText?

as a reminder: if you are using edittext.setSelection() to set the cursor, and it is NOT working while setting up an alertdialog for example, make sure to set the selection() AFTER the dialog has been created

example:

AlertDialog dialog = builder.show();
input.setSelection(x,y);

Should composer.lock be committed to version control?

After doing it both ways for a few projects my stance is that composer.lock should not be committed as part of the project.

composer.lock is build metadata which is not part of the project. The state of dependencies should be controlled through how you're versioning them (either manually or as part of your automated build process) and not arbitrarily by the last developer to update them and commit the lock file.

If you are concerned about your dependencies changing between composer updates then you have a lack of confidence in your versioning scheme. Versions (1.0, 1.1, 1.2, etc) should be immutable and you should avoid "dev-" and "X.*" wildcards outside of initial feature development.

Committing the lock file is a regression for your dependency management system as the dependency version has now gone back to being implicitly defined.

Also, your project should never have to be rebuilt or have its dependencies reacquired in each environment, especially prod. Your deliverable (tar, zip, phar, a directory, etc) should be immutable and promoted through environments without changing.

Variable name as a string in Javascript

var x = 2;
for(o in window){ 
   if(window[o] === x){
      alert(o);
   }
}

However, I think you should do like "karim79"

Chrome/jQuery Uncaught RangeError: Maximum call stack size exceeded

You can also get this error when you have an infinite loop. Make sure that you don't have any unending, recursive self references.

Chain-calling parent initialisers in python

The way you are doing it is indeed the recommended one (for Python 2.x).

The issue of whether the class is passed explicitly to super is a matter of style rather than functionality. Passing the class to super fits in with Python's philosophy of "explicit is better than implicit".

Restore DB — Error RESTORE HEADERONLY is terminating abnormally.

My guess is that you are trying to restore in lower versions which wont work

TortoiseSVN Error: "OPTIONS of 'https://...' could not connect to server (...)"

For me this was the solution.

The problem was that the SVN server was behind a reverse-proxy (pound). And the reverse proxy had to be told to allow OPTIONS.

How do I get formatted JSON in .NET using C#?

Shortest version to prettify existing JSON: (edit: using JSON.net)

JToken.Parse("mystring").ToString()

Input:

{"menu": { "id": "file", "value": "File", "popup": { "menuitem": [ {"value": "New", "onclick": "CreateNewDoc()"}, {"value": "Open", "onclick": "OpenDoc()"}, {"value": "Close", "onclick": "CloseDoc()"} ] } }}

Output:

{
  "menu": {
    "id": "file",
    "value": "File",
    "popup": {
      "menuitem": [
        {
          "value": "New",
          "onclick": "CreateNewDoc()"
        },
        {
          "value": "Open",
          "onclick": "OpenDoc()"
        },
        {
          "value": "Close",
          "onclick": "CloseDoc()"
        }
      ]
    }
  }
}

To pretty-print an object:

JToken.FromObject(myObject).ToString()

Confirm deletion using Bootstrap 3 modal box

enter image description here Following solution is better than bootbox.js, because

  • It can do everything bootbox.js can do;
  • The use syntax is simpler
  • It allows you to elegantly control the color of your message using "error", "warning" or "info"
  • Bootbox is 986 lines long, mine only 110 lines long

digimango.messagebox.js:

_x000D_
_x000D_
const dialogTemplate = '\_x000D_
    <div class ="modal" id="digimango_messageBox" role="dialog">\_x000D_
        <div class ="modal-dialog">\_x000D_
            <div class ="modal-content">\_x000D_
                <div class ="modal-body">\_x000D_
                    <p class ="text-success" id="digimango_messageBoxMessage">Some text in the modal.</p>\_x000D_
                    <p><textarea id="digimango_messageBoxTextArea" cols="70" rows="5"></textarea></p>\_x000D_
                </div>\_x000D_
                <div class ="modal-footer">\_x000D_
                    <button type="button" class ="btn btn-primary" id="digimango_messageBoxOkButton">OK</button>\_x000D_
                    <button type="button" class ="btn btn-default" data-dismiss="modal" id="digimango_messageBoxCancelButton">Cancel</button>\_x000D_
                </div>\_x000D_
            </div>\_x000D_
        </div>\_x000D_
    </div>';_x000D_
_x000D_
_x000D_
// See the comment inside function digimango_onOkClick(event) {_x000D_
var digimango_numOfDialogsOpened = 0;_x000D_
_x000D_
_x000D_
function messageBox(msg, significance, options, actionConfirmedCallback) {_x000D_
    if ($('#digimango_MessageBoxContainer').length == 0) {_x000D_
        var iDiv = document.createElement('div');_x000D_
        iDiv.id = 'digimango_MessageBoxContainer';_x000D_
        document.getElementsByTagName('body')[0].appendChild(iDiv);_x000D_
        $("#digimango_MessageBoxContainer").html(dialogTemplate);_x000D_
    }_x000D_
_x000D_
    var okButtonName, cancelButtonName, showTextBox, textBoxDefaultText;_x000D_
_x000D_
    if (options == null) {_x000D_
        okButtonName = 'OK';_x000D_
        cancelButtonName = null;_x000D_
        showTextBox = null;_x000D_
        textBoxDefaultText = null;_x000D_
    } else {_x000D_
        okButtonName = options.okButtonName;_x000D_
        cancelButtonName = options.cancelButtonName;_x000D_
        showTextBox = options.showTextBox;_x000D_
        textBoxDefaultText = options.textBoxDefaultText;_x000D_
    }_x000D_
_x000D_
    if (showTextBox == true) {_x000D_
        if (textBoxDefaultText == null)_x000D_
            $('#digimango_messageBoxTextArea').val('');_x000D_
        else_x000D_
            $('#digimango_messageBoxTextArea').val(textBoxDefaultText);_x000D_
_x000D_
        $('#digimango_messageBoxTextArea').show();_x000D_
    }_x000D_
    else_x000D_
        $('#digimango_messageBoxTextArea').hide();_x000D_
_x000D_
    if (okButtonName != null)_x000D_
        $('#digimango_messageBoxOkButton').html(okButtonName);_x000D_
    else_x000D_
        $('#digimango_messageBoxOkButton').html('OK');_x000D_
_x000D_
    if (cancelButtonName == null)_x000D_
        $('#digimango_messageBoxCancelButton').hide();_x000D_
    else {_x000D_
        $('#digimango_messageBoxCancelButton').show();_x000D_
        $('#digimango_messageBoxCancelButton').html(cancelButtonName);_x000D_
    }_x000D_
_x000D_
    $('#digimango_messageBoxOkButton').unbind('click');_x000D_
    $('#digimango_messageBoxOkButton').on('click', { callback: actionConfirmedCallback }, digimango_onOkClick);_x000D_
_x000D_
    $('#digimango_messageBoxCancelButton').unbind('click');_x000D_
    $('#digimango_messageBoxCancelButton').on('click', digimango_onCancelClick);_x000D_
_x000D_
    var content = $("#digimango_messageBoxMessage");_x000D_
_x000D_
    if (significance == 'error')_x000D_
        content.attr('class', 'text-danger');_x000D_
    else if (significance == 'warning')_x000D_
        content.attr('class', 'text-warning');_x000D_
    else_x000D_
        content.attr('class', 'text-success');_x000D_
_x000D_
    content.html(msg);_x000D_
_x000D_
    if (digimango_numOfDialogsOpened == 0)_x000D_
        $("#digimango_messageBox").modal();_x000D_
_x000D_
    digimango_numOfDialogsOpened++;_x000D_
}_x000D_
_x000D_
function digimango_onOkClick(event) {_x000D_
    // JavaScript's nature is unblocking. So the function call in the following line will not block,_x000D_
    // thus the last line of this function, which is to hide the dialog, is executed before user_x000D_
    // clicks the "OK" button on the second dialog shown in the callback. Therefore we need to count_x000D_
    // how many dialogs is currently showing. If we know there is still a dialog being shown, we do_x000D_
    // not execute the last line in this function._x000D_
    if (typeof (event.data.callback) != 'undefined')_x000D_
        event.data.callback($('#digimango_messageBoxTextArea').val());_x000D_
_x000D_
    digimango_numOfDialogsOpened--;_x000D_
_x000D_
    if (digimango_numOfDialogsOpened == 0)_x000D_
        $('#digimango_messageBox').modal('hide');_x000D_
}_x000D_
_x000D_
function digimango_onCancelClick() {_x000D_
    digimango_numOfDialogsOpened--;_x000D_
_x000D_
    if (digimango_numOfDialogsOpened == 0)_x000D_
        $('#digimango_messageBox').modal('hide');_x000D_
}
_x000D_
_x000D_
_x000D_

To use digimango.messagebox.js:

_x000D_
_x000D_
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">_x000D_
<html xmlns="http://www.w3.org/1999/xhtml">_x000D_
<head>_x000D_
    <title>A useful generic message box</title>_x000D_
    <meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />_x000D_
_x000D_
    <link rel="stylesheet" type="text/css" href="~/Content/bootstrap.min.css" media="screen" />_x000D_
    <script src="~/Scripts/jquery-1.10.2.min.js" type="text/javascript"></script>_x000D_
    <script src="~/Scripts/bootstrap.js" type="text/javascript"></script>_x000D_
    <script src="~/Scripts/bootbox.js" type="text/javascript"></script>_x000D_
_x000D_
    <script src="~/Scripts/digimango.messagebox.js" type="text/javascript"></script>_x000D_
_x000D_
_x000D_
    <script type="text/javascript">_x000D_
        function testAlert() {_x000D_
            messageBox('Something went wrong!', 'error');_x000D_
        }_x000D_
_x000D_
        function testAlertWithCallback() {_x000D_
            messageBox('Something went wrong!', 'error', null, function () {_x000D_
                messageBox('OK clicked.');_x000D_
            });_x000D_
        }_x000D_
_x000D_
        function testConfirm() {_x000D_
            messageBox('Do you want to proceed?', 'warning', { okButtonName: 'Yes', cancelButtonName: 'No' }, function () {_x000D_
                messageBox('Are you sure you want to proceed?', 'warning', { okButtonName: 'Yes', cancelButtonName: 'No' });_x000D_
            });_x000D_
        }_x000D_
_x000D_
        function testPrompt() {_x000D_
            messageBox('How do you feel now?', 'normal', { showTextBox: true }, function (userInput) {_x000D_
                messageBox('User entered "' + userInput + '".');_x000D_
            });_x000D_
        }_x000D_
_x000D_
        function testPromptWithDefault() {_x000D_
            messageBox('How do you feel now?', 'normal', { showTextBox: true, textBoxDefaultText: 'I am good!' }, function (userInput) {_x000D_
                messageBox('User entered "' + userInput + '".');_x000D_
            });_x000D_
        }_x000D_
_x000D_
    </script>_x000D_
</head>_x000D_
_x000D_
<body>_x000D_
    <a href="#" onclick="testAlert();">Test alert</a> <br/>_x000D_
    <a href="#" onclick="testAlertWithCallback();">Test alert with callback</a> <br />_x000D_
    <a href="#" onclick="testConfirm();">Test confirm</a> <br/>_x000D_
    <a href="#" onclick="testPrompt();">Test prompt</a><br />_x000D_
    <a href="#" onclick="testPromptWithDefault();">Test prompt with default text</a> <br />_x000D_
</body>_x000D_
_x000D_
</html>
_x000D_
_x000D_
_x000D_

Working with TIFFs (import, export) in Python using numpy

First, I downloaded a test TIFF image from this page called a_image.tif. Then I opened with PIL like this:

>>> from PIL import Image
>>> im = Image.open('a_image.tif')
>>> im.show()

This showed the rainbow image. To convert to a numpy array, it's as simple as:

>>> import numpy
>>> imarray = numpy.array(im)

We can see that the size of the image and the shape of the array match up:

>>> imarray.shape
(44, 330)
>>> im.size
(330, 44)

And the array contains uint8 values:

>>> imarray
array([[  0,   1,   2, ..., 244, 245, 246],
       [  0,   1,   2, ..., 244, 245, 246],
       [  0,   1,   2, ..., 244, 245, 246],
       ..., 
       [  0,   1,   2, ..., 244, 245, 246],
       [  0,   1,   2, ..., 244, 245, 246],
       [  0,   1,   2, ..., 244, 245, 246]], dtype=uint8)

Once you're done modifying the array, you can turn it back into a PIL image like this:

>>> Image.fromarray(imarray)
<Image.Image image mode=L size=330x44 at 0x2786518>

Pass Method as Parameter using C#

You should use a Func<string, int> delegate, that represents a function taking a string argument and returning an int value:

public bool RunTheMethod(Func<string, int> myMethod)
{
    // Do stuff
    myMethod.Invoke("My String");
    // Do stuff
    return true;
}

Then invoke it this way:

public bool Test()
{
    return RunTheMethod(Method1);
}

Jenkins returned status code 128 with github

i had sometime ago the same issue. make sure that your ssh key doesn't have password and use not common user account (e.g. better to user account called jenkins or so).

check following article http://fourkitchens.com/blog/2011/09/20/trigger-jenkins-builds-pushing-github

Plot multiple columns on the same graph in R

A very simple solution:

df <- read.csv("df.csv",sep=",",head=T)
x <- cbind(df$Xax,df$Xax,df$Xax,df$Xax)
y <- cbind(df$A,df$B,df$C,df$D)
matplot(x,y,type="p")

please note it just plots the data and it does not plot any regression line.

How to link html pages in same or different folders?

Answer below is what I created to link html contents from another shared drive to the html page I would send out to managers. Of course, the path is relative to your using, but in my case, I would just send them the html, and everything else that is updated from load runner dynamically would be updated for me. Saves tons of paper, and they can play with the numbers as they see fit instead of just a hard copy this way.

SRC="file://///shareddrive/shareddrive-folder/username/scripting/testReport\contents.html" NAME="contents_frame" title="Table of Contents"

.NET Console Application Exit Event

The application is a server which simply runs until the system shuts down or it receives a Ctrl+C or the console window is closed.

Due to the extraordinary nature of the application, it is not feasible to "gracefully" exit. (It may be that I could code another application which would send a "server shutdown" message but that would be overkill for one application and still insufficient for certain circumstances like when the server (Actual OS) is actually shutting down.)

Because of these circumstances I added a "ConsoleCtrlHandler" where I stop my threads and clean up my COM objects etc...


Public Declare Auto Function SetConsoleCtrlHandler Lib "kernel32.dll" (ByVal Handler As HandlerRoutine, ByVal Add As Boolean) As Boolean

Public Delegate Function HandlerRoutine(ByVal CtrlType As CtrlTypes) As Boolean

Public Enum CtrlTypes
  CTRL_C_EVENT = 0
  CTRL_BREAK_EVENT
  CTRL_CLOSE_EVENT
  CTRL_LOGOFF_EVENT = 5
  CTRL_SHUTDOWN_EVENT
End Enum

Public Function ControlHandler(ByVal ctrlType As CtrlTypes) As Boolean
.
.clean up code here
.
End Function

Public Sub Main()
.
.
.
SetConsoleCtrlHandler(New HandlerRoutine(AddressOf ControlHandler), True)
.
.
End Sub

This setup seems to work out perfectly. Here is a link to some C# code for the same thing.

How does database indexing work?

Classic example "Index in Books"

Consider a "Book" of 1000 pages, divided by 10 Chapters, each section with 100 pages.

Simple, huh?

Now, imagine you want to find a particular Chapter that contains a word "Alchemist". Without an index page, you have no other option than scanning through the entire book/Chapters. i.e: 1000 pages.

This analogy is known as "Full Table Scan" in database world.

enter image description here

But with an index page, you know where to go! And more, to lookup any particular Chapter that matters, you just need to look over the index page, again and again, every time. After finding the matching index you can efficiently jump to that chapter by skipping the rest.

But then, in addition to actual 1000 pages, you will need another ~10 pages to show the indices, so totally 1010 pages.

Thus, the index is a separate section that stores values of indexed column + pointer to the indexed row in a sorted order for efficient look-ups.

Things are simple in schools, isn't it? :P

Close Android Application

As per my knowledge, finish function close the current displayed screen only.

Refer this example (where see the answer given by 'plusminus'), it will sure help you to close your application.

Plotting two variables as lines using ggplot2 on the same graph

Using your data:

test_data <- data.frame(
var0 = 100 + c(0, cumsum(runif(49, -20, 20))),
var1 = 150 + c(0, cumsum(runif(49, -10, 10))),
Dates = seq.Date(as.Date("2002-01-01"), by="1 month", length.out=100))

I create a stacked version which is what ggplot() would like to work with:

stacked <- with(test_data,
                data.frame(value = c(var0, var1),
                           variable = factor(rep(c("Var0","Var1"),
                                                 each = NROW(test_data))),
                           Dates = rep(Dates, 2)))

In this case producing stacked was quite easy as we only had to do a couple of manipulations, but reshape() and the reshape and reshape2 might be useful if you have a more complex real data set to manipulate.

Once the data are in this stacked form, it only requires a simple ggplot() call to produce the plot you wanted with all the extras (one reason why higher-level plotting packages like lattice and ggplot2 are so useful):

require(ggplot2)
p <- ggplot(stacked, aes(Dates, value, colour = variable))
p + geom_line()

I'll leave it to you to tidy up the axis labels, legend title etc.

HTH

Converting Date and Time To Unix Timestamp

You can use Date.getTime() function, or the Date object itself which when divided returns the time in milliseconds.

var d = new Date();

d/1000
> 1510329641.84

d.getTime()/1000
> 1510329641.84

How can I get an int from stdio in C?

The typical way is with scanf:

int input_value;

scanf("%d", &input_value);

In most cases, however, you want to check whether your attempt at reading input succeeded. scanf returns the number of items it successfully converted, so you typically want to compare the return value against the number of items you expected to read. In this case you're expecting to read one item, so:

if (scanf("%d", &input_value) == 1)
    // it succeeded
else
    // it failed

Of course, the same is true of all the scanf family (sscanf, fscanf and so on).

Specify path to node_modules in package.json

Yarn supports this feature:

# .yarnrc file in project root
--modules-folder /node_modules

But your experience can vary depending on which packages you use. I'm not sure you'd want to go into that rabbit hole.

Get the value of input text when enter key pressed

Something like this (not tested, but should work)

Pass this as parameter in Html:

<input type="text" placeholder="some text" class="search" onkeydown="search(this)"/>

And alert the value of the parameter passed into the search function:

function search(e){
  alert(e.value);
}

How to find the parent element using javascript

Use the change event of the select:

$('#my_select').change(function()
{
   $(this).parents('td').css('background', '#000000');
});

Conversion failed when converting from a character string to uniqueidentifier - Two GUIDs

You have to check unique identifier column and you have to give a diff value to that particular field if you give the same value it will not work. It enforces uniqueness of the key.

Here is the code:

Insert into production.product 
(Name,ProductNumber,MakeFlag,FinishedGoodsFlag,Color,SafetyStockLevel,ReorderPoint,StandardCost,ListPrice,Size
,SizeUnitMeasureCode,WeightUnitMeasureCode,Weight,DaysToManufacture,
    ProductLine, 
    Class, 
    Style ,
    ProductSubcategoryID 
    ,ProductModelID 
    ,SellStartDate 
,SellEndDate 
    ,DiscontinuedDate 
    ,rowguid
    ,ModifiedDate 
  )
  values ('LL lemon' ,'BC-1234',0,0,'blue',400,960,0.00,100.00,Null,Null,Null,null,1,null,null,null,null,null,'1998-06-01 00:00:00.000',null,null,'C4244F0C-ABCE-451B-A895-83C0E6D1F468','2004-03-11 10:01:36.827')

Output an Image in PHP

$file = '../image.jpg';

if (file_exists($file))
{
    $size = getimagesize($file);

    $fp = fopen($file, 'rb');

    if ($size and $fp)
    {
        // Optional never cache
    //  header('Cache-Control: no-cache, no-store, max-age=0, must-revalidate');
    //  header('Expires: Mon, 26 Jul 1997 05:00:00 GMT'); // Date in the past
    //  header('Pragma: no-cache');

        // Optional cache if not changed
    //  header('Last-Modified: '.gmdate('D, d M Y H:i:s', filemtime($file)).' GMT');

        // Optional send not modified
    //  if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) and 
    //      filemtime($file) == strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']))
    //  {
    //      header('HTTP/1.1 304 Not Modified');
    //  }

        header('Content-Type: '.$size['mime']);
        header('Content-Length: '.filesize($file));

        fpassthru($fp);

        exit;
    }
}

http://php.net/manual/en/function.fpassthru.php

Create Excel files from C# without office

Unless you have Excel installed on the Server/PC or use an external tool (which is possible without using Excel Interop, see Create Excel (.XLS and .XLSX) file from C#), it will fail. Using the interop requires Excel to be installed.

Run two async tasks in parallel and collect results in .NET 4.5

To answer this point:

I want Sleep to be an async method so it can await other methods

you can maybe rewrite the Sleep function like this:

private static async Task<int> Sleep(int ms)
{
    Console.WriteLine("Sleeping for " + ms);
    var task = Task.Run(() => Thread.Sleep(ms));
    await task;
    Console.WriteLine("Sleeping for " + ms + "END");
    return ms;
}

static void Main(string[] args)
{
    Console.WriteLine("Starting");

    var task1 = Sleep(2000);
    var task2 = Sleep(1000);

    int totalSlept = task1.Result +task2.Result;

    Console.WriteLine("Slept for " + totalSlept + " ms");
    Console.ReadKey();
}

running this code will output :

Starting
Sleeping for 2000
Sleeping for 1000
*(one second later)*
Sleeping for 1000END
*(one second later)*
Sleeping for 2000END
Slept for 3000 ms

Key error when selecting columns in pandas dataframe after read_csv

The key error generally comes if the key doesn't match any of the dataframe column name 'exactly':

You could also try:

import csv
import pandas as pd
import re
    with open (filename, "r") as file:
        df = pd.read_csv(file, delimiter = ",")
        df.columns = ((df.columns.str).replace("^ ","")).str.replace(" $","")
        print(df.columns)

Add multiple items to already initialized arraylist in java

I believe the answer above is incorrect, the proper way to initialize with multiple values would be this...

int[] otherList ={1,2,3,4,5};

so the full answer with the proper initialization would look like this

int[] otherList ={1,2,3,4,5};
arList.addAll(Arrays.asList(otherList));

How to discover number of *logical* cores on Mac OS X?

CLARIFICATION

When this question was asked the OP did not say that he wanted the number of LOGICAL cores rather than the actual number of cores, so this answer logically (no pun intended) answers with a way to get the actual number of real physical cores, not the number that the OS tries to virtualize through hyperthreading voodoo.

UPDATE TO HANDLE FLAW IN YOSEMITE

Due to a weird bug in OS X Yosemite (and possibly newer versions, such as the upcoming El Capitan), I've made a small modification. (The old version still worked perfectly well if you just ignore STDERR, which is all the modification does for you.)


Every other answer given here either

  1. gives incorrect information
  2. gives no information, due to an error in the command implementation
  3. runs unbelievably slowly (taking the better part of a minute to complete), or
  4. gives too much data, and thus might be useful for interactive use, but is useless if you want to use the data programmatically (for instance, as input to a command like bundle install --jobs 3 where you want the number in place of 3 to be one less than the number of cores you've got, or at least not more than the number of cores)

The way to get just the number of cores, reliably, correctly, reasonably quickly, and without extra information or even extra characters around the answer, is this:

system_profiler SPHardwareDataType 2> /dev/null | grep 'Total Number of Cores' | cut -d: -f2 | tr -d ' '

How often should you use git-gc?

You can do it without any interruption, with the new (Git 2.0 Q2 2014) setting gc.autodetach.

See commit 4c4ac4d and commit 9f673f9 (Nguy?n Thái Ng?c Duy, aka pclouds):

gc --auto takes time and can block the user temporarily (but not any less annoyingly).
Make it run in background on systems that support it.
The only thing lost with running in background is printouts. But gc output is not really interesting.
You can keep it in foreground by changing gc.autodetach.


Since that 2.0 release, there was a bug though: git 2.7 (Q4 2015) will make sure to not lose the error message.
See commit 329e6e8 (19 Sep 2015) by Nguy?n Thái Ng?c Duy (pclouds).
(Merged by Junio C Hamano -- gitster -- in commit 076c827, 15 Oct 2015)

gc: save log from daemonized gc --auto and print it next time

While commit 9f673f9 (gc: config option for running --auto in background - 2014-02-08) helps reduce some complaints about 'gc --auto' hogging the terminal, it creates another set of problems.

The latest in this set is, as the result of daemonizing, stderr is closed and all warnings are lost. This warning at the end of cmd_gc() is particularly important because it tells the user how to avoid "gc --auto" running repeatedly.
Because stderr is closed, the user does not know, naturally they complain about 'gc --auto' wasting CPU.

Daemonized gc now saves stderr to $GIT_DIR/gc.log.
Following gc --auto will not run and gc.log printed out until the user removes gc.log
.

PostgreSQL: ERROR: operator does not exist: integer = character varying

I think it is telling you exactly what is wrong. You cannot compare an integer with a varchar. PostgreSQL is strict and does not do any magic typecasting for you. I'm guessing SQLServer does typecasting automagically (which is a bad thing).

If you want to compare these two different beasts, you will have to cast one to the other using the casting syntax ::.

Something along these lines:

create view view1
as 
select table1.col1,table2.col1,table3.col3
from table1 
inner join
table2 
inner join 
table3
on 
table1.col4::varchar = table2.col5
/* Here col4 of table1 is of "integer" type and col5 of table2 is of type "varchar" */
/* ERROR: operator does not exist: integer = character varying */
....;

Notice the varchar typecasting on the table1.col4.

Also note that typecasting might possibly render your index on that column unusable and has a performance penalty, which is pretty bad. An even better solution would be to see if you can permanently change one of the two column types to match the other one. Literately change your database design.

Or you could create a index on the casted values by using a custom, immutable function which casts the values on the column. But this too may prove suboptimal (but better than live casting).

How to manually send HTTP POST requests from Firefox or Chrome browser?

You can post requests directly from the browser with ReqBin. No plugin or desktop app is required.

https://reqbin.com

Python 3 string.join() equivalent?

Visit https://www.tutorialspoint.com/python/string_join.htm

s=" "
seq=["ab", "cd", "ef"]
print(s.join(seq))

ab cd ef

s="."
print(s.join(seq))

ab.cd.ef

What is "Signal 15 received"

This indicates the linux has delivered a SIGTERM to your process. This is usually at the request of some other process (via kill()) but could also be sent by your process to itself (using raise()). This signal requests an orderly shutdown of your process.

If you need a quick cheatsheet of signal numbers, open a bash shell and:

$ kill -l
 1) SIGHUP   2) SIGINT   3) SIGQUIT  4) SIGILL
 5) SIGTRAP  6) SIGABRT  7) SIGBUS   8) SIGFPE
 9) SIGKILL 10) SIGUSR1 11) SIGSEGV 12) SIGUSR2
13) SIGPIPE 14) SIGALRM 15) SIGTERM 16) SIGSTKFLT
17) SIGCHLD 18) SIGCONT 19) SIGSTOP 20) SIGTSTP
21) SIGTTIN 22) SIGTTOU 23) SIGURG  24) SIGXCPU
25) SIGXFSZ 26) SIGVTALRM   27) SIGPROF 28) SIGWINCH
29) SIGIO   30) SIGPWR  31) SIGSYS  34) SIGRTMIN
35) SIGRTMIN+1  36) SIGRTMIN+2  37) SIGRTMIN+3  38) SIGRTMIN+4
39) SIGRTMIN+5  40) SIGRTMIN+6  41) SIGRTMIN+7  42) SIGRTMIN+8
43) SIGRTMIN+9  44) SIGRTMIN+10 45) SIGRTMIN+11 46) SIGRTMIN+12
47) SIGRTMIN+13 48) SIGRTMIN+14 49) SIGRTMIN+15 50) SIGRTMAX-14
51) SIGRTMAX-13 52) SIGRTMAX-12 53) SIGRTMAX-11 54) SIGRTMAX-10
55) SIGRTMAX-9  56) SIGRTMAX-8  57) SIGRTMAX-7  58) SIGRTMAX-6
59) SIGRTMAX-5  60) SIGRTMAX-4  61) SIGRTMAX-3  62) SIGRTMAX-2
63) SIGRTMAX-1  64) SIGRTMAX    

You can determine the sender by using an appropriate signal handler like:

#include <signal.h>
#include <stdio.h>
#include <stdlib.h>

void sigterm_handler(int signal, siginfo_t *info, void *_unused)
{
  fprintf(stderr, "Received SIGTERM from process with pid = %u\n",
      info->si_pid);
  exit(0);
}

int main (void)
{
  struct sigaction action = {
    .sa_handler = NULL,
    .sa_sigaction = sigterm_handler,
    .sa_mask = 0,
    .sa_flags = SA_SIGINFO,
    .sa_restorer = NULL
  };

  sigaction(SIGTERM, &action, NULL);
  sleep(60);

  return 0;
}

Notice that the signal handler also includes a call to exit(). It's also possible for your program to continue to execute by ignoring the signal, but this isn't recommended in general (if it's a user doing it there's a good chance it will be followed by a SIGKILL if your process doesn't exit, and you lost your opportunity to do any cleanup then).

Can't connect to MySQL server on '127.0.0.1' (10061) (2003)

maybe it has a different solution, but I fixed it by finding mysqld.exe and running following command in the console:

C:\wamp\bin\mysql\mysql5.6.17\bin\mysqld.exe --console

You should be able to see following result:

enter image description here

Gridview row editing - dynamic binding to a DropDownList

protected void grvSecondaryLocations_RowEditing(object sender, GridViewEditEventArgs e)  
{  
    grvSecondaryLocations.EditIndex = e.NewEditIndex;  

    DropDownList ddlPbx = (DropDownList)(grvSecondaryLocations.Rows[grvSecondaryLocations.EditIndex].FindControl("ddlPBXTypeNS"));
    if (ddlPbx != null)  
    {  
        ddlPbx.DataSource = _pbxTypes;  
        ddlPbx.DataBind();  
    }  

    .... (more stuff)  
}

R: `which` statement with multiple conditions

The && function is not vectorized. You need the & function:

EUR <- PCs[which(PCs$V13 < 9 & PCs$V13 > 3), ]

Get first and last date of current month with JavaScript or jQuery

I fixed it with Datejs

This is alerting the first day:

var fd = Date.today().clearTime().moveToFirstDayOfMonth();
var firstday = fd.toString("MM/dd/yyyy");
alert(firstday);

This is for the last day:

var ld = Date.today().clearTime().moveToLastDayOfMonth();
var lastday = ld.toString("MM/dd/yyyy");
alert(lastday);

How to declare a global variable in php?

What if you make use of procedural function instead of variable and call them any where as you.

I usually make a collection of configuration values and put them inside a function with return statement. I just include that where I need to make use of global value and call particular function.

function host()
{
   return "localhost";
}

What's the difference between git reset --mixed, --soft, and --hard?

A short answer in what context the 3 options are used:

To keep the current changes in the code but to rewrite the commit history:

  • soft: You can commit everything at once and create a new commit with a new description (if you use torotise git or any most other GUIs, this is the one to use, as you can still tick which files you want in the commit and make multiple commits that way with different files. In Sourcetree all files would be staged for commit.)
  • mixed: You will have to add the individual files again to the index before you make commits (in Sourcetree all the changed files would be unstaged)

To actually lose your changes in the code as well:

  • hard: you don't just rewrite history but also lose all your changes up to the point you reset

How do I launch a Git Bash window with particular working directory using a script?

Another option is to create a shortcut with the following properties:

enter image description here

Target should be:

"%SYSTEMDRIVE%\Program Files (x86)\Git\bin\sh.exe" --login

Start in is the folder you wish your Git Bash prompt to launch into.

Setting query string using Fetch GET request

Template literals are also a valid option here, and provide a few benefits.

You can include raw strings, numbers, boolean values, etc:

    let request = new Request(`https://example.com/?name=${'Patrick'}&number=${1}`);

You can include variables:

    let request = new Request(`https://example.com/?name=${nameParam}`);

You can include logic and functions:

    let request = new Request(`https://example.com/?name=${nameParam !== undefined ? nameParam : getDefaultName() }`);

As far as structuring the data of a larger query string, I like using an array concatenated to a string. I find it easier to understand than some of the other methods:

let queryString = [
  `param1=${getParam(1)}`,
  `param2=${getParam(2)}`,
  `param3=${getParam(3)}`,
].join('&');

let request = new Request(`https://example.com/?${queryString}`, {
  method: 'GET'
});

How to get all elements inside "div" that starts with a known text

Option 1: Likely fastest (but not supported by some browsers if used on Document or SVGElement) :

var elements = document.getElementById('parentContainer').children;

Option 2: Likely slowest :

var elements = document.getElementById('parentContainer').getElementsByTagName('*');

Option 3: Requires change to code (wrap a form instead of a div around it) :

// Since what you're doing looks like it should be in a form...
var elements = document.forms['parentContainer'].elements;

var matches = [];

for (var i = 0; i < elements.length; i++)
    if (elements[i].value.indexOf('q17_') == 0)
        matches.push(elements[i]);

Conversion failed when converting date and/or time from character string while inserting datetime

set Culture to english from web.config file

  <globalization uiCulture="en-US" culture="en-US" />

for example if you set the culture to arabic the thime will be

?22?/09?/2017? 02:16:57 ?

and you get the error:Conversion failed when converting date and/or time from character string while inserting datetime

How do I loop through or enumerate a JavaScript object?

In ECMAScript 5 you have new approach in iteration fields of literal - Object.keys

More information you can see on MDN

My choice is below as a faster solution in current versions of browsers (Chrome30, IE10, FF25)

var keys = Object.keys(p),
    len = keys.length,
    i = 0,
    prop,
    value;
while (i < len) {
    prop = keys[i];
    value = p[prop];
    i += 1;
}

You can compare performance of this approach with different implementations on jsperf.com:

Browser support you can see on Kangax's compat table

For old browser you have simple and full polyfill

UPD:

performance comparison for all most popular cases in this question on perfjs.info:

object literal iteration

How to convert Strings to and from UTF8 byte arrays in Java

You can convert directly via the String(byte[], String) constructor and getBytes(String) method. Java exposes available character sets via the Charset class. The JDK documentation lists supported encodings.

90% of the time, such conversions are performed on streams, so you'd use the Reader/Writer classes. You would not incrementally decode using the String methods on arbitrary byte streams - you would leave yourself open to bugs involving multibyte characters.

Why does Firebug say toFixed() is not a function?

That is because Low is a string.

.toFixed() only works with a number.


Try doing:

Low = parseFloat(Low).toFixed(..);

javascript set cookie with expire time

document.cookie = "cookie_name=cookie_value; max-age=31536000; path=/";

Will set the value for a year.

Javascript validation: Block special characters

I think checking keypress events is not completely adequate, as I believe users can copy/paste into input boxes without triggering a keypress.

So onblur is probably somewhat more reliable (but is less immediate).

To truly make sure characters you don't want are not entered into input boxes (or textareas, etc.), I think you will need to

  1. check keypress (if you want to give immediate feedback) and
  2. also check onblur,
  3. as well as validating inputs on the server (which is the only real way to make sure nothing unwanted gets into your data).

The code samples in the other answers will work fine for doing the client-side checks (just don't rely only on checking keypress events), but as was pointed out in the accepted answer, a server-side check is really required.

XML shape drawable not rendering desired color

In drawable I use this xml code to define the border and background:

<shape xmlns:android="http://schemas.android.com/apk/res/android"> 
  <stroke android:width="4dp" android:color="#D8FDFB" /> 
  <padding android:left="7dp" android:top="7dp" 
    android:right="7dp" android:bottom="7dp" /> 
  <corners android:radius="4dp" /> 
  <solid android:color="#f0600000"/> 
</shape> 

How can I remove all text after a character in bash?

An example might have been useful, but if I understood you correctly, this would work:

echo "Hello: world" | cut -f1 -d":"

This will convert Hello: world into Hello.

React-Native: Module AppRegistry is not a registered callable module

I had the same problem several times. The following solutions are solved my problem. I have listed out them according to complexity.

  1. Restart the computer and see whether the problem is out

  2. If it still exists, try to kill the process on running port usually 8080

    netstat -ano | findstr 8080

     taskkill /F /PID <PID>
    
  3. If it still exists, go to 'android' directory as follow and go further

    cd android

    ./gradlew clean

and start node

npm start

then run npx react-native run android or expo stat and press 'a'

Hope you will OK with the above issues.

Get selected value in dropdown list using JavaScript

If you have a select element that looks like this:

<select id="ddlViewBy">
  <option value="1">test1</option>
  <option value="2" selected="selected">test2</option>
  <option value="3">test3</option>
</select>

Running this code:

var e = document.getElementById("ddlViewBy");
var strUser = e.value;

Would make strUser be 2. If what you actually want is test2, then do this:

var e = document.getElementById("ddlViewBy");
var strUser = e.options[e.selectedIndex].text;

Which would make strUser be test2

How to create a function in a cshtml template?

If you want to access your page's global variables, you can do so:

@{
    ViewData["Title"] = "Home Page";

    var LoadingButtons = Model.ToDictionary(person => person, person => false);

    string GetLoadingState (string person) => LoadingButtons[person] ? "is-loading" : string.Empty;
}

Append integer to beginning of list in Python

>>> a = 5
>>> li = [1, 2, 3]
>>> [a] + li  # Don't use 'list' as variable name.
[5, 1, 2, 3]

Postgres - Transpose Rows to Columns

If anyone else that finds this question and needs a dynamic solution for this where you have an undefined number of columns to transpose to and not exactly 3, you can find a nice solution here: https://github.com/jumpstarter-io/colpivot

Passing parameters from jsp to Spring Controller method

Your controller method should be like this:

@RequestMapping(value = " /<your mapping>/{id}", method=RequestMethod.GET)
public String listNotes(@PathVariable("id")int id,Model model) {
    Person person = personService.getCurrentlyAuthenticatedUser();
    int id = 2323;  // Currently passing static values for testing
    model.addAttribute("person", new Person());
    model.addAttribute("listPersons", this.personService.listPersons());
    model.addAttribute("listNotes",this.notesService.listNotesBySectionId(id,person));
    return "note";
}

Use the id in your code, call the controller method from your JSP as:

/{your mapping}/{your id}

UPDATE:

Change your jsp code to:

<c:forEach items="${listNotes}" var="notices" varStatus="status">
    <tr>
        <td>${notices.noticesid}</td>
        <td>${notices.notetext}</td>
        <td>${notices.notetag}</td>
        <td>${notices.notecolor}</td>
        <td>${notices.sectionid}</td>
        <td>${notices.canvasid}</td>
        <td>${notices.canvasnName}</td>
        <td>${notices.personid}</td>
        <td><a href="<c:url value='/editnote/${listNotes[status.index].noticesid}' />" >Edit</a></td>
        <td><a href="<c:url value='/removenote/${listNotes[status.index].noticesid}' />" >Delete</a></td>
    </tr>
</c:forEach>

Opening popup windows in HTML

I feel like this is the simplest way. (Feel free to change the width and height values).

<a href="http://www.google.com" 
target="popup" 
onclick="window.open('http://www.google.com','popup','width=600,height=600'); return false;">
Link Text goes here...
</a>

Traverse all the Nodes of a JSON Object Tree with JavaScript

My Script:

op_needed = [];
callback_func = function(val) {
  var i, j, len;
  results = [];
  for (j = 0, len = val.length; j < len; j++) {
    i = val[j];
    if (i['children'].length !== 0) {
      call_func(i['children']);
    } else {
      op_needed.push(i['rel_path']);
    }
  }
  return op_needed;
};

Input JSON:

[
    {
        "id": null, 
        "name": "output",   
        "asset_type_assoc": [], 
        "rel_path": "output",
        "children": [
            {
                "id": null, 
                "name": "output",   
                "asset_type_assoc": [], 
                "rel_path": "output/f1",
                "children": [
                    {
                        "id": null, 
                        "name": "v#",
                        "asset_type_assoc": [], 
                        "rel_path": "output/f1/ver",
                        "children": []
                    }
                ]
            }
       ]
   }
]

Function Call:

callback_func(inp_json);

Output as per my Need:

["output/f1/ver"]

How to list files in an android directory?

In order to access the files, the permissions must be given in the manifest file.

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

Try this:

String path = Environment.getExternalStorageDirectory().toString()+"/Pictures";
Log.d("Files", "Path: " + path);
File directory = new File(path);
File[] files = directory.listFiles();
Log.d("Files", "Size: "+ files.length);
for (int i = 0; i < files.length; i++)
{
    Log.d("Files", "FileName:" + files[i].getName());
}

Merge two dataframes by index

By default:
join is a column-wise left join
pd.merge is a column-wise inner join
pd.concat is a row-wise outer join

pd.concat:
takes Iterable arguments. Thus, it cannot take DataFrames directly (use [df,df2])
Dimensions of DataFrame should match along axis

Join and pd.merge:
can take DataFrame arguments

Reverse a comparator in Java 8

You can use Comparator.reverseOrder() to have a comparator giving the reverse of the natural ordering.

If you want to reverse the ordering of an existing comparator, you can use Comparator.reversed().

Sample code:

Stream.of(1, 4, 2, 5)
    .sorted(Comparator.reverseOrder()); 
    // stream is now [5, 4, 2, 1]

Stream.of("foo", "test", "a")
    .sorted(Comparator.comparingInt(String::length).reversed()); 
    // stream is now [test, foo, a], sorted by descending length

Center image horizontally within a div

yeah, the code like this work fine

<div>
 <img>
</div>

but just to remind u, the style for image

object-fit : *depend on u*

so the final code be like Example

<div style="border: 1px solid red;">
    <img
      src="./assets/images/truck-toy.jpg"
      alt=""
      srcset=""
      style="
       border-radius: 50%;
       height: 7.5rem;
       width: 7.5rem;
       object-fit: contain;"
    />
</div>

Final result

Is there any way to return HTML in a PHP function? (without building the return value as a string)

This may be a sketchy solution, and I'd appreciate anybody pointing out whether this is a bad idea, since it's not a standard use of functions. I've had some success getting HTML out of a PHP function without building the return value as a string with the following:

function noStrings() {
    echo ''?>
        <div>[Whatever HTML you want]</div>
    <?php;
}

The just 'call' the function:

noStrings();

And it will output:

<div>[Whatever HTML you want]</div>

Using this method, you can also define PHP variables within the function and echo them out inside the HTML.

Capture iframe load complete event

There is another consistent way (only for IE9+) in vanilla JavaScript for this:

const iframe = document.getElementById('iframe');
const handleLoad = () => console.log('loaded');

iframe.addEventListener('load', handleLoad, true)

And if you're interested in Observables this does the trick:

return Observable.fromEventPattern(
  handler => iframe.addEventListener('load', handler, true),
  handler => iframe.removeEventListener('load', handler)
);

How to do fade-in and fade-out with JavaScript and CSS

I usually use these utility functions. element is the HTML element and duration is the desired duration in milliseconds.

export const fadeIn = (element, duration) => {
    (function increment(value = 0) {
        element.style.opacity = String(value);
        if (element.style.opacity !== '1') {
            setTimeout(() => {
                increment(value + 0.1);
            }, duration / 10);
        }
    })();
};

export const fadeOut = (element, duration) => {
    (function decrement() {
        (element.style.opacity -= 0.1) < 0 ? element.style.display = 'none' : setTimeout(() => {
            decrement();
        }, duration / 10);
    })();
};

Can I change the headers of the HTTP request sent by the browser?

ModHeader extension for Google Chrome, is also a good option. You can just set the Headers you want and just enter the URL in the browser, it will automatically take the headers from the extension when you hit the url. Only thing is, it will send headers for each and every URL you will hit so you have to disable or delete it after use.

How to create a XML object from String in Java?

If you can create a string xml you can easily transform it to the xml document object e.g. -

String xmlString = "<?xml version=\"1.0\" encoding=\"utf-8\"?><a><b></b><c></c></a>";  

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();  
DocumentBuilder builder;  
try {  
    builder = factory.newDocumentBuilder();  
    Document document = builder.parse(new InputSource(new StringReader(xmlString)));  
} catch (Exception e) {  
    e.printStackTrace();  
} 

You can use the document object and xml parsing libraries or xpath to get back the ip address.

iOS Remote Debugging

You also need to have 'Private Browsing' turned OFF.

Settings > Safari > Private Browsing > OFF

The storage engine for the table doesn't support repair. InnoDB or MyISAM?

You have the wrong table set on the command. You should use the following on your setup:

ALTER TABLE scode_tracker.ap_visits ENGINE=MyISAM;

How can I pipe stderr, and not stdout?

You can use the rc shell.

First install the package (it's less than 1 MB).

This an example of how you would discard standard output and pipe standard error to grep in rc:

find /proc/ >[1] /dev/null |[2] grep task

You can do it without leaving Bash:

rc -c 'find /proc/ >[1] /dev/null |[2] grep task'

As you may have noticed, you can specify which file descriptor you want piped by using brackets after the pipe.

Standard file descriptors are numerated as such:

  • 0 : Standard input
  • 1 : Standard output
  • 2 : Standard error

How to pass text in a textbox to JavaScript function?

You can get textbox value and Id by the following simple example in dotNet programming

<html>
        <head>
         <script type="text/javascript">
             function GetTextboxId_Value(textBox) 
                 {
                 alert(textBox.value);    // To get Text Box Value(Text)
                 alert(textBox.id);      // To get Text Box Id like txtSearch
             }
         </script>     
        </head>
 <body>
 <input id="txtSearch" type="text" onkeyup="GetTextboxId_Value(this)" />  </body>
 </html>

How to initialize all the elements of an array to any specific value in java

Evidently you can use Arrays.fill(), The way you have it done also works though.

Tools to search for strings inside files without indexing

I'm a fan of the Find-In-Files dialog in Notepad++. Bonus: It's free.

enter image description here

How do I write a custom init for a UIView subclass in Swift?

Here is how I do a Subview on iOS in Swift -

class CustomSubview : UIView {

    init() {
        super.init(frame: UIScreen.mainScreen().bounds);

        let windowHeight : CGFloat = 150;
        let windowWidth  : CGFloat = 360;

        self.backgroundColor = UIColor.whiteColor();
        self.frame = CGRectMake(0, 0, windowWidth, windowHeight);
        self.center = CGPoint(x: UIScreen.mainScreen().bounds.width/2, y: 375);

        //for debug validation
        self.backgroundColor = UIColor.grayColor();
        print("My Custom Init");

        return;
    }

    required init?(coder aDecoder: NSCoder) { fatalError("init(coder:) has not been implemented"); }
}

syntaxerror: unexpected character after line continuation character in python

Replace

f = open(D\\python\\HW\\2_1 - Copy.cp,"r");

by

f = open("D:\\python\\HW\\2_1 - Copy.cp", "r")

  1. File path needs to be a string (constant)
  2. need colon in Windows file path
  3. space after comma for better style
  4. ; after statement is allowed but fugly.

What tutorial are you using?

Firebase TIMESTAMP to date and Time

Try this one,

var timestamp = firebase.firestore.FieldValue.serverTimestamp()
var timestamp2 = new Date(timestamp.toDate()).toUTCString()

How can I connect to Android with ADB over TCP?

As Brian said:

According to a post on xda-developers, you can enable ADB over WiFi from the device with the commands

setprop service.adb.tcp.port 5555

stop adbd

start adbd

And you can disable it and return ADB to listening on USB with

setprop service.adb.tcp.port -1

stop adbd

start adbd

If you have USB access already, it is even easier to switch to using WiFi. From a command line on the computer that has the device connected via USB, issue the commands

adb tcpip 5555

adb connect 192.168.0.101:5555

To tell the ADB daemon return to listening over USB

adb usb

There are also several apps on the Android Market that automate this process.

It works.You just need to access the android shell and type those commands...

One other (easier) solution is on the Market: adbWireless, it will automatically set your phone.

Root is required! for both...

Convert JSON to Map

Use JSON lib E.g. http://www.json.org/java/

// Assume you have a Map<String, String> in JSONObject jdata
@SuppressWarnings("unchecked")
Iterator<String> nameItr = jdata.keys();
Map<String, String> outMap = new HashMap<String, String>();
while(nameItr.hasNext()) {
    String name = nameItr.next();
    outMap.put(name, jdata.getString(name));

}

How to query DATETIME field using only date in Microsoft SQL Server?

This works for me for MS SQL server:

select * from test
where 
year(date) = 2015
and month(date) = 10
and day(date)= 28 ;

How to define object in array in Mongoose schema correctly with 2d geo index

You can declare trk by the following ways : - either

trk : [{
    lat : String,
    lng : String
     }]

or

trk : { type : Array , "default" : [] }

In the second case during insertion make the object and push it into the array like

db.update({'Searching criteria goes here'},
{
 $push : {
    trk :  {
             "lat": 50.3293714,
             "lng": 6.9389939
           } //inserted data is the object to be inserted 
  }
});

or you can set the Array of object by

db.update ({'seraching criteria goes here ' },
{
 $set : {
          trk : [ {
                     "lat": 50.3293714,
                     "lng": 6.9389939
                  },
                  {
                     "lat": 50.3293284,
                     "lng": 6.9389634
                  }
               ]//'inserted Array containing the list of object'
      }
});

Begin, Rescue and Ensure in Ruby?

Yes, ensure is called in any circumstances. For more information see "Exceptions, Catch, and Throw" of the Programming Ruby book and search for "ensure".

How do I include a path to libraries in g++

To specify a directory to search for (binary) libraries, you just use -L:

-L/data[...]/lib

To specify the actual library name, you use -l:

-lfoo  # (links libfoo.a or libfoo.so)

To specify a directory to search for include files (different from libraries!) you use -I:

-I/data[...]/lib

So I think what you want is something like

g++ -g -Wall -I/data[...]/lib testing.cpp fileparameters.cpp main.cpp -o test

These compiler flags (amongst others) can also be found at the GNU GCC Command Options manual:

ImportError: No module named 'pygame'

Since no answer stated this:

Make sure that, if you are using a virtual environment, you have activated it before trying to run the program.

If you don't really know if you are using a virtual environment or not, check with the other contributors of the project. Or maybe try to find a file with the name activate like this: find . -name activate.

Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while processing the request on the server."

I have got the same issue, here I give my problem and my solution hoping this would help someone:

Following other people recommendation I went to the log of the server (Windows Server 2012 in my case) in :

Control Panel -> Administrative Tools -> Event Viewer

Then in the left side:

Windows Logs -> Application:

enter image description here

In the warnings I found the message from my site and in my case it was due to a null reference:

*Exception type: NullReferenceException 
Exception message: Object reference not set to an instance of an object.*

And checking at the function described in the log I found a non initialized object and that was it.

So it could be a null reference exception in the code. Hope someone find this useful, greetings.

What does elementFormDefault do in XSD?

New, detailed answer and explanation to an old, frequently asked question...

Short answer: If you don't add elementFormDefault="qualified" to xsd:schema, then the default unqualified value means that locally declared elements are in no namespace.

There's a lot of confusion regarding what elementFormDefault does, but this can be quickly clarified with a short example...

Streamlined version of your XSD:

<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema"
        xmlns:target="http://www.levijackson.net/web340/ns"
        targetNamespace="http://www.levijackson.net/web340/ns">
  <element name="assignments">
    <complexType>
      <sequence>
        <element name="assignment" type="target:assignmentInfo" 
                 minOccurs="1" maxOccurs="unbounded"/>
      </sequence>
    </complexType>
  </element>
  <complexType name="assignmentInfo">
    <sequence>
      <element name="name" type="string"/>
    </sequence>
    <attribute name="id" type="string" use="required"/>
  </complexType>
</schema>

Key points:

  • The assignment element is locally defined.
  • Elements locally defined in XSD are in no namespace by default.
    • This is because the default value for elementFormDefault is unqualified.
    • This arguably is a design mistake by the creators of XSD.
    • Standard practice is to always use elementFormDefault="qualified" so that assignment is in the target namespace as one would expect.
  • It is a rarely used form attribute on xs:element declarations for which elementFormDefault establishes default values.

Seemingly Valid XML

This XML looks like it should be valid according to the above XSD:

<assignments xmlns="http://www.levijackson.net/web340/ns"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://www.levijackson.net/web340/ns try.xsd">
  <assignment id="a1">
    <name>John</name>
  </assignment>
</assignments>

Notice:

  • The default namespace on assignments places assignments and all of its descendents in the default namespace (http://www.levijackson.net/web340/ns).

Perplexing Validation Error

Despite looking valid, the above XML yields the following confusing validation error:

[Error] try.xml:4:23: cvc-complex-type.2.4.a: Invalid content was found starting with element 'assignment'. One of '{assignment}' is expected.

Notes:

  • You would not be the first developer to curse this diagnostic that seems to say that the content is invalid because it expected to find an assignment element but it actually found an assignment element. (WTF)
  • What this really means: The { and } around assignment means that validation was expecting assignment in no namespace here. Unfortunately, when it says that it found an assignment element, it doesn't mention that it found it in a default namespace which differs from no namespace.

Solution

  • Vast majority of the time: Add elementFormDefault="qualified" to the xsd:schema element of the XSD. This means valid XML must place elements in the target namespace when locally declared in the XSD; otherwise, valid XML must place locally declared elements in no namespace.
  • Tiny minority of the time: Change the XML to comply with the XSD's requirement that assignment be in no namespace. This can be achieved, for example, by adding xmlns="" to the assignment element.

Credits: Thanks to Michael Kay for helpful feedback on this answer.

How to create XML file with specific structure in Java

You can use the JDOM library in Java. Define your tags as Element objects, document your elements with Document Class, and build your xml file with SAXBuilder. Try this example:

//Root Element
Element root=new Element("CONFIGURATION");
Document doc=new Document();
//Element 1
Element child1=new Element("BROWSER");
//Element 1 Content
child1.addContent("chrome");
//Element 2
Element child2=new Element("BASE");
//Element 2 Content
child2.addContent("http:fut");
//Element 3
Element child3=new Element("EMPLOYEE");
//Element 3 --> In this case this element has another element with Content
child3.addContent(new Element("EMP_NAME").addContent("Anhorn, Irene"));

//Add it in the root Element
root.addContent(child1);
root.addContent(child2);
root.addContent(child3);
//Define root element like root
doc.setRootElement(root);
//Create the XML
XMLOutputter outter=new XMLOutputter();
outter.setFormat(Format.getPrettyFormat());
outter.output(doc, new FileWriter(new File("myxml.xml")));

Is there an exponent operator in C#?

The lack of an exponential operator for C# was a big annoyance for us when looking for a new language to convert our calculation software to from the good ol' vb6.

I'm glad we went with C# but it still annoys me whenever I'm writing a complex equation including exponents. The Math.Pow() method makes equations quite hard to read IMO.

Our solution was to create a special DoubleX class where we override the ^-operator (see below)

This works fairly well as long as you declare at least one of the variables as DoubleX:

DoubleX a = 2;
DoubleX b = 3;

Console.WriteLine($"a = {a}, b = {b}, a^b = {a ^ b}");

or use an explicit converter on standard doubles:

double c = 2;
double d = 3;

Console.WriteLine($"c = {c}, d = {d}, c^d = {c ^ (DoubleX)d}");     // Need explicit converter

One problem with this method though is that the exponent is calculated in the wrong order compared to other operators. This can be avoided by always putting an extra ( ) around the operation which again makes it a bit harder to read the equations:

DoubleX a = 2;
DoubleX b = 3;

Console.WriteLine($"a = {a}, b = {b}, 3+a^b = {3 + a ^ b}");        // Wrong result
Console.WriteLine($"a = {a}, b = {b}, 3+a^b = {3 + (a ^ b)}");      // Correct result

I hope this can be of help to others who uses a lot of complex equations in their code, and maybe someone even has an idea of how to improve this method?!

DoubleX class:

using System;

namespace ExponentialOperator
{
    /// <summary>
    /// Double class that uses ^ as exponential operator
    /// </summary>
    public class DoubleX
    {
        #region ---------------- Fields ----------------

        private readonly double _value;

        #endregion ------------- Fields ----------------

        #region -------------- Properties --------------

        public double Value
        {
            get { return _value; }
        }

        #endregion ----------- Properties --------------

        #region ------------- Constructors -------------

        public DoubleX(double value)
        {
            _value = value;
        }

        public DoubleX(int value)
        {
            _value = Convert.ToDouble(value);
        }

        #endregion ---------- Constructors -------------

        #region --------------- Methods ----------------

        public override string ToString()
        {
            return _value.ToString();
        }

        #endregion ------------ Methods ----------------

        #region -------------- Operators ---------------

        // Change the ^ operator to be used for exponents.

        public static DoubleX operator ^(DoubleX value, DoubleX exponent)
        {
            return Math.Pow(value, exponent);
        }

        public static DoubleX operator ^(DoubleX value, double exponent)
        {
            return Math.Pow(value, exponent);
        }

        public static DoubleX operator ^(double value, DoubleX exponent)
        {
            return Math.Pow(value, exponent);
        }

        public static DoubleX operator ^(DoubleX value, int exponent)
        {
            return Math.Pow(value, exponent);
        }

        #endregion ----------- Operators ---------------

        #region -------------- Converters --------------

        // Allow implicit convertion

        public static implicit operator DoubleX(double value)
        {
            return new DoubleX(value);
        }

        public static implicit operator DoubleX(int value)
        {
            return new DoubleX(value);
        }

        public static implicit operator Double(DoubleX value)
        {
            return value._value;
        }

        #endregion ----------- Converters --------------
    }
}

Tar error: Unexpected EOF in archive

I had a similar error, but in my case the cause was file renaming. I was creating a gzipped file file1.tar.gz and repeatedly updating it in another tarfile with tar -uvf ./combined.tar ./file1.tar.gz. I got the unexpected EOF error when after untarring combined.tar and trying to untar file1.tar.gz.

I noticed there was a difference in the output of file before and after tarring:

$file file1.tar.gz
file1.tar.gz: gzip compressed data, was "file1.tar", last modified: Mon Jul 29 12:00:00 2019, from Unix
$tar xvf combined.tar
$file file1.tar.gz
file1.tar.gz: gzip compressed data, was "file_old.tar", last modified: Mon Jul 29 12:00:00 2019, from Unix

So, it appears that the file had a different name when I originally created combined.tar, and using the tar update function doesn't overwrite the metadata for the gzipped filename. The solution was to recreate combined.tar from scratch instead of updating it.

I still don't know exactly what happened, since changing the name of a gzipped file doesn't normally break it.

check if jquery has been loaded, then load it if false

You can check if jQuery is loaded or not by many ways such as:

if (typeof jQuery == 'undefined') {

    // jQuery IS NOT loaded, do stuff here.

}


if (typeof jQuery == 'function')
//or
if (typeof $== 'function')


if (jQuery) {
    // This will throw an error in STRICT MODE if jQuery is not loaded, so don't use if using strict mode
    alert("jquery is loaded");
} else {
    alert("Not loaded");
}


if( 'jQuery' in window ) {
    // Do Stuff
}

Now after checking if jQuery is not loaded, you can load jQuery like this:

Although this part has been answered by many in this post but still answering for the sake of completeness of the code


    // This part should be inside your IF condition when you do not find jQuery loaded
    var script = document.createElement('script');
    script.type = "text/javascript";
    script.src = "http://code.jquery.com/jquery-3.3.1.min.js";
    document.getElementsByTagName('head')[0].appendChild(script);

Detect if a Form Control option button is selected in VBA

If you are using a Form Control, you can get the same property as ActiveX by using OLEFormat.Object property of the Shape Object. Better yet assign it in a variable declared as OptionButton to get the Intellisense kick in.

Dim opt As OptionButton

With Sheets("Sheet1") ' Try to be always explicit
    Set opt = .Shapes("Option Button 1").OLEFormat.Object ' Form Control
    Debug.Pring opt.Value ' returns 1 (true) or -4146 (false)
End With

But then again, you really don't need to know the value.
If you use Form Control, you associate a Macro or sub routine with it which is executed when it is selected. So you just need to set up a sub routine that identifies which button is clicked and then execute a corresponding action for it.

For example you have 2 Form Control Option Buttons.

Sub CheckOptions()
    Select Case Application.Caller
    Case "Option Button 1"
    ' Action for option button 1
    Case "Option Button 2"
    ' Action for option button 2
    End Select
End Sub

In above code, you have only one sub routine assigned to both option buttons.
Then you test which called the sub routine by checking Application.Caller.
This way, no need to check whether the option button value is true or false.

jQuery textbox change event doesn't fire until textbox loses focus?

Reading your comments took me to a dirty fix. This is not a right way, I know, but can be a work around.

$(function() {
    $( "#inputFieldId" ).autocomplete({
        source: function( event, ui ) {
            alert("do your functions here");
            return false;
        }
    });
});

Is there a way to use SVG as content in a pseudo element :before or :after

Making use of CSS sprites and data uri gives extra interesting benefits like fast loading and less requests AND we get IE8 support by using image/base64:

Codepen sample using SVG

HTML

<div class="div1"></div>
<div class="div2"></div>

CSS

.div1:after, .div2:after {
  content: '';
  display: block;
  height: 80px;
  width: 80px;
  background-image: url(data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20version%3D%221.1%22%20height%3D%2280%22%20width%3D%22160%22%3E%0D%0A%20%20%3Ccircle%20cx%3D%2240%22%20cy%3D%2240%22%20r%3D%2238%22%20stroke%3D%22black%22%20stroke-width%3D%221%22%20fill%3D%22red%22%20%2F%3E%0D%0A%20%20%3Ccircle%20cx%3D%22120%22%20cy%3D%2240%22%20r%3D%2238%22%20stroke%3D%22black%22%20stroke-width%3D%221%22%20fill%3D%22blue%22%20%2F%3E%0D%0A%3C%2Fsvg%3E);
}
.div2:after {
  background-position: -80px 0;
}

For IE8, change to this:

  background-image: url(data:image/png;base64,data......);

JavaScript Uncaught ReferenceError: jQuery is not defined; Uncaught ReferenceError: $ is not defined

You have an error in you script tag construction, this:

<script language="JavaScript" type="text/javascript" script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.10.0/jquery-ui.min.js"></script>

Should look like this:

<script language="JavaScript" type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jqueryui/1.10.0/jquery-ui.min.js"></script>

You have a 'script' word lost in the middle of your script tag. Also you should remove the http:// to let the browser decide whether to use HTTP or HTTPS.

UPDATE

But your main error is that you are including jQuery UI (ONLY) you must include jQuery first! jQuery UI and jQuery are used together, not in separate. jQuery UI depends on jQuery. You should put this line before jQuery UI:

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.0/jquery.min.js"></script>

Remove duplicates from a list of objects based on property in Java 8

If order does not matter and when it's more performant to run in parallel, Collect to a Map and then get values:

employee.stream().collect(Collectors.toConcurrentMap(Employee::getId, Function.identity(), (p, q) -> p)).values()

What is difference between monolithic and micro kernel?

1.Monolithic Kernel (Pure Monolithic) :all

  • All Kernel Services From single component

    (-) addition/removal is not possible, less/Zero flexible

    (+) inter Component Communication is better

e.g. :- Traditional Unix

2.Micro Kernel :few

  • few services(Memory management ,CPU management,IPC etc) from core kernel, other services(File management,I/O management. etc.) from different layers/component

  • Split Approach [Some services is in privileged(kernel) mode and some are in Normal(user) mode]

    (+)flexible for changes/up-gradations

    (-)communication overhead

e.g.:- QNX etc.

3.Modular kernel(Modular Monolithic) :most

  • Combination of Micro and Monolithic kernel

  • Collection of Modules -- modules can be --> Static + Dynamic

  • Drivers come in the form of Modules

e.g. :- Linux Modern OS

INSERT with SELECT

Correct Syntax: select spelling was wrong

INSERT INTO courses (name, location, gid)
SELECT name, location, 'whatever you want' 
FROM courses 
WHERE cid = $ci 

CSS force image resize and keep aspect ratio

_x000D_
_x000D_
img {_x000D_
  max-width: 80px; /* Also works with percentage value like 100% */_x000D_
  height: auto;_x000D_
}
_x000D_
<p>This image is originally 400x400 pixels, but should get resized by the CSS:</p>_x000D_
<img width="400" height="400" src="https://i.stack.imgur.com/aEEkn.png">_x000D_
_x000D_
<p>Let's say the author of the HTML deliberately wants_x000D_
  the height to be half the value of the width,_x000D_
  this CSS will ignore the HTML author's wishes, which may or may not be what you want:_x000D_
</p>_x000D_
<img width="400" height="200" src="https://i.stack.imgur.com/aEEkn.png">
_x000D_
_x000D_
_x000D_

Connection refused on docker container

Command EXPOSE in your Dockerfile lets you bind container's port to some port on the host machine but it doesn't do anything else. When running container, to bind ports specify -p option.

So let's say you expose port 5000. After building the image when you run the container, run docker run -p 5000:5000 name. This binds container's port 5000 to your laptop/computers port 5000 and that portforwarding lets container to receive outside requests.

This should do it.

Merging two images with PHP

You can try my function for merging images horizontally or vertically without changing image ratio. just copy paste will work.

function merge($filename_x, $filename_y, $filename_result, $mergeType = 0) {

    //$mergeType 0 for horizandal merge 1 for vertical merge

 // Get dimensions for specified images
 list($width_x, $height_x) = getimagesize($filename_x);
 list($width_y, $height_y) = getimagesize($filename_y);


$lowerFileName = strtolower($filename_x); 
if(substr_count($lowerFileName, '.jpg')>0 || substr_count($lowerFileName, '.jpeg')>0){
    $image_x = imagecreatefromjpeg($filename_x);    
}else if(substr_count($lowerFileName, '.png')>0){
    $image_x = imagecreatefrompng($filename_x); 
}else if(substr_count($lowerFileName, '.gif')>0){
    $image_x = imagecreatefromgif($filename_x); 
}


$lowerFileName = strtolower($filename_y); 
if(substr_count($lowerFileName, '.jpg')>0 || substr_count($lowerFileName, '.jpeg')>0){
    $image_y = imagecreatefromjpeg($filename_y);    
}else if(substr_count($lowerFileName, '.png')>0){
    $image_y = imagecreatefrompng($filename_y); 
}else if(substr_count($lowerFileName, '.gif')>0){
    $image_y = imagecreatefromgif($filename_y); 
}


if($mergeType==0){
    //for horizandal merge
     if($height_y<$height_x){
        $new_height = $height_y;

        $new_x_height = $new_height;
        $precentageReduced = ($height_x - $new_height)/($height_x/100);
        $new_x_width = ceil($width_x - (($width_x/100) * $precentageReduced));

         $tmp = imagecreatetruecolor($new_x_width, $new_x_height);
        imagecopyresampled($tmp, $image_x, 0, 0, 0, 0, $new_x_width, $new_x_height, $width_x, $height_x);
        $image_x = $tmp;

        $height_x = $new_x_height;
        $width_x = $new_x_width;

     }else{
        $new_height = $height_x;

        $new_y_height = $new_height;
        $precentageReduced = ($height_y - $new_height)/($height_y/100);
        $new_y_width = ceil($width_y - (($width_y/100) * $precentageReduced));

         $tmp = imagecreatetruecolor($new_y_width, $new_y_height);
        imagecopyresampled($tmp, $image_y, 0, 0, 0, 0, $new_y_width, $new_y_height, $width_y, $height_y);
        $image_y = $tmp;

        $height_y = $new_y_height;
        $width_y = $new_y_width;

     }

     $new_width = $width_x + $width_y;

     $image = imagecreatetruecolor($new_width, $new_height);

    imagecopy($image, $image_x, 0, 0, 0, 0, $width_x, $height_x);
    imagecopy($image, $image_y, $width_x, 0, 0, 0, $width_y, $height_y);

}else{


    //for verical merge
    if($width_y<$width_x){
        $new_width = $width_y;

        $new_x_width = $new_width;
        $precentageReduced = ($width_x - $new_width)/($width_x/100);
        $new_x_height = ceil($height_x - (($height_x/100) * $precentageReduced));

        $tmp = imagecreatetruecolor($new_x_width, $new_x_height);
        imagecopyresampled($tmp, $image_x, 0, 0, 0, 0, $new_x_width, $new_x_height, $width_x, $height_x);
        $image_x = $tmp;

        $width_x = $new_x_width;
        $height_x = $new_x_height;

     }else{
        $new_width = $width_x;

        $new_y_width = $new_width;
        $precentageReduced = ($width_y - $new_width)/($width_y/100);
        $new_y_height = ceil($height_y - (($height_y/100) * $precentageReduced));

         $tmp = imagecreatetruecolor($new_y_width, $new_y_height);
        imagecopyresampled($tmp, $image_y, 0, 0, 0, 0, $new_y_width, $new_y_height, $width_y, $height_y);
        $image_y = $tmp;

        $width_y = $new_y_width;
        $height_y = $new_y_height;

     }

     $new_height = $height_x + $height_y;

     $image = imagecreatetruecolor($new_width, $new_height);

    imagecopy($image, $image_x, 0, 0, 0, 0, $width_x, $height_x);
    imagecopy($image, $image_y, 0, $height_x, 0, 0, $width_y, $height_y);

}





$lowerFileName = strtolower($filename_result); 
if(substr_count($lowerFileName, '.jpg')>0 || substr_count($lowerFileName, '.jpeg')>0){
    imagejpeg($image, $filename_result);
}else if(substr_count($lowerFileName, '.png')>0){
    imagepng($image, $filename_result);
}else if(substr_count($lowerFileName, '.gif')>0){
    imagegif($image, $filename_result); 
}


 // Clean up
 imagedestroy($image);
 imagedestroy($image_x);
 imagedestroy($image_y);

}


merge('images/h_large.jpg', 'images/v_large.jpg', 'images/merged_har.jpg',0); //merge horizontally
merge('images/h_large.jpg', 'images/v_large.jpg', 'images/merged.jpg',1); //merge vertically

Add hover text without javascript like we hover on a user's reputation

This can also be done in CSS, for more customisability:

_x000D_
_x000D_
.hoverable {
  position: relative;
}

.hoverable>.hoverable__tooltip {
  display: none;
}

.hoverable:hover>.hoverable__tooltip {
  display: inline;
  position: absolute;
  top: 1em;
  left: 1em;
  background: #888;
  border: 1px solid black;
}
_x000D_
<div class="hoverable">
  <span class="hoverable__main">Main text</span>
  <span class="hoverable__tooltip">Hover text</span>
</div>
_x000D_
_x000D_
_x000D_

(Obviously, styling can be improved)

Can you autoplay HTML5 videos on the iPad?

Just set

webView.mediaPlaybackRequiresUserAction = NO;

The autoplay works for me on iOS.

Check whether a value exists in JSON object

This example puts your JSON into proper format and does an existence check. I use jquery for convenience.

http://jsfiddle.net/nXFxC/

<!-- HTML -->
<span id="test">Hello</span><br>
<span id="test2">Hello</span>

//Javascript

$(document).ready(function(){
    var JSON = {"animals":[{"name":"cat"}, {"name":"dog"}]};

if(JSON.animals[1].name){      
$("#test").html("It exists");
}
if(!JSON.animals[2]){       
$("#test2").html("It doesn't exist");
}
});

Run a Python script from another Python script, passing in arguments

Try using os.system:

os.system("script2.py 1")

execfile is different because it is designed to run a sequence of Python statements in the current execution context. That's why sys.argv didn't change for you.

test attribute in JSTL <c:if> tag

Attributes in JSP tag libraries in general can be either static or resolved at request time. If they are resolved at request time the JSP will resolve their value at runtime and pass the output on to the tag. This means you can put pretty much any JSP code into the attribute and the tag will behave accordingly to what output that produces.

If you look at the jstl taglib docs you can see which attributes are reuest time and which are not. http://java.sun.com/products/jsp/jstl/1.1/docs/tlddocs/index.html

Why doesn't [01-12] range work as expected?

You seem to have misunderstood how character classes definition works in regex.

To match any of the strings 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, or 12, something like this works:

0[1-9]|1[0-2]

References


Explanation

A character class, by itself, attempts to match one and exactly one character from the input string. [01-12] actually defines [012], a character class that matches one character from the input against any of the 3 characters 0, 1, or 2.

The - range definition goes from 1 to 1, which includes just 1. On the other hand, something like [1-9] includes 1, 2, 3, 4, 5, 6, 7, 8, 9.

Beginners often make the mistakes of defining things like [this|that]. This doesn't "work". This character definition defines [this|a], i.e. it matches one character from the input against any of 6 characters in t, h, i, s, | or a. More than likely (this|that) is what is intended.

References


How ranges are defined

So it's obvious now that a pattern like between [24-48] hours doesn't "work". The character class in this case is equivalent to [248].

That is, - in a character class definition doesn't define numeric range in the pattern. Regex engines doesn't really "understand" numbers in the pattern, with the exception of finite repetition syntax (e.g. a{3,5} matches between 3 and 5 a).

Range definition instead uses ASCII/Unicode encoding of the characters to define ranges. The character 0 is encoded in ASCII as decimal 48; 9 is 57. Thus, the character definition [0-9] includes all character whose values are between decimal 48 and 57 in the encoding. Rather sensibly, by design these are the characters 0, 1, ..., 9.

See also


Another example: A to Z

Let's take a look at another common character class definition [a-zA-Z]

In ASCII:

  • A = 65, Z = 90
  • a = 97, z = 122

This means that:

  • [a-zA-Z] and [A-Za-z] are equivalent
  • In most flavors, [a-Z] is likely to be an illegal character range
    • because a (97) is "greater than" than Z (90)
  • [A-z] is legal, but also includes these six characters:
    • [ (91), \ (92), ] (93), ^ (94), _ (95), ` (96)

Related questions

using jquery $.ajax to call a PHP function

I developed a jQuery plugin that allows you to call any core PHP function or even user defined PHP functions as methods of the plugin: jquery.php

After including jquery and jquery.php in the head of our document and placing request_handler.php on our server we would start using the plugin in the manner described below.

For ease of use reference the function in a simple manner:

    var P = $.fn.php;

Then initialize the plugin:

P('init', 
{
    // The path to our function request handler is absolutely required
    'path': 'http://www.YourDomain.com/jqueryphp/request_handler.php',

    // Synchronous requests are required for method chaining functionality
    'async': false,

    // List any user defined functions in the manner prescribed here
            // There must be user defined functions with these same names in your PHP
    'userFunctions': {

        languageFunctions: 'someFunc1 someFunc2'
    }
});             

And now some usage scenarios:

// Suspend callback mode so we don't work with the DOM
P.callback(false);

// Both .end() and .data return data to variables
var strLenA = P.strlen('some string').end();
var strLenB = P.strlen('another string').end();
var totalStrLen = strLenA + strLenB;
console.log( totalStrLen ); // 25

// .data Returns data in an array
var data1 = P.crypt("Some Crypt String").data();
console.log( data1 ); // ["$1$Tk1b01rk$shTKSqDslatUSRV3WdlnI/"]

Demonstrating PHP function chaining:

var data1 = P.strtoupper("u,p,p,e,r,c,a,s,e").strstr([], "C,A,S,E").explode(",", [], 2).data();
var data2 = P.strtoupper("u,p,p,e,r,c,a,s,e").strstr([], "C,A,S,E").explode(",", [], 2).end();
console.log( data1, data2 );

Demonstrating sending a JSON block of PHP pseudo-code:

var data1 = 
        P.block({
    $str: "Let's use PHP's file_get_contents()!",
    $opts: 
    [
        {
            http: {
                method: "GET",
                header: "Accept-language: en\r\n" +
                        "Cookie: foo=bar\r\n"
            }
        }
    ],
    $context: 
    {
        stream_context_create: ['$opts']
    },
    $contents: 
    {
        file_get_contents: ['http://www.github.com/', false, '$context']
    },
    $html: 
    {
        htmlentities: ['$contents']
    }
}).data();
    console.log( data1 );

The backend configuration provides a whitelist so you can restrict which functions can be called. There are a few other patterns for working with PHP described by the plugin as well.

String isNullOrEmpty in Java?

For new projects, I've started having every class I write extend the same base class where I can put all the utility methods that are annoyingly missing from Java like this one, the equivalent for collections (tired of writing list != null && ! list.isEmpty()), null-safe equals, etc. I still use Apache Commons for the implementation but this saves a small amount of typing and I haven't seen any negative effects.

Generate a range of dates using SQL

I had the same requirement - I just use this. User enters the number of days by which he/she wants to limit the calendar range to.

  SELECT DAY, offset
    FROM (SELECT to_char(SYSDATE, 'DD-MON-YYYY') AS DAY, 0 AS offset
            FROM DUAL
          UNION ALL
          SELECT to_char(SYSDATE - rownum, 'DD-MON-YYYY'), rownum
            FROM all_objects d)
            where offset <= &No_of_days

I use the above result set as driving view in LEFT OUTER JOIN with other views involving tables which have dates.

How to sort an array of integers correctly

This answer is equivalent to some of the existing answers, but ECMAScript 6 arrow functions provide a much more compact syntax that allows us to define an inline sort function without sacrificing readability:

numArray = numArray.sort((a, b) => a - b);

It is supported in most browsers today.

Get current cursor position

You get the cursor position by calling GetCursorPos.

POINT p;
if (GetCursorPos(&p))
{
    //cursor position now in p.x and p.y
}

This returns the cursor position relative to screen coordinates. Call ScreenToClient to map to window coordinates.

if (ScreenToClient(hwnd, &p))
{
    //p.x and p.y are now relative to hwnd's client area
}

You hide and show the cursor with ShowCursor.

ShowCursor(FALSE);//hides the cursor
ShowCursor(TRUE);//shows it again

You must ensure that every call to hide the cursor is matched by one that shows it again.

Laravel 5 Carbon format datetime

If you are using eloquent model (by looking at your code, i think you are), you dont need to convert it into array. Just use it as object. Becaus elike Thomas Kim said, by default it is a Carbon instance

So it should be

$suborder['payment_date'] = $item->created_at->format('Y-m-d')

But if it is not then, you need convert it to Carbon object as Milan Maharjan answer

$createdAt = Carbon::parse($item['created_at']);

referenced before assignment error in python

My Scenario

def example():
    cl = [0, 1]
    def inner():
        #cl = [1, 2] # access this way will throw `reference before assignment`
        cl[0] = 1 
        cl[1] = 2   # these won't

    inner()

What does "select count(1) from table_name" on any database tables mean?

There is no difference.

COUNT(1) is basically just counting a constant value 1 column for each row. As other users here have said, it's the same as COUNT(0) or COUNT(42). Any non-NULL value will suffice.

http://asktom.oracle.com/pls/asktom/f?p=100:11:2603224624843292::::P11_QUESTION_ID:1156151916789

The Oracle optimizer did apparently use to have bugs in it, which caused the count to be affected by which column you picked and whether it was in an index, so the COUNT(1) convention came into being.

How to display and hide a div with CSS?

Html Code :

    <a id="f">Show First content!</a>
    <br/>
    <a id="s">Show Second content!!</a>
    <div class="a">Default Content</div>
    <div class="ab hideDiv">First content</div>
    <div class="abc hideDiv">Second content</div>

Script code:

$(document).ready(function() {
    $("#f").mouseover(function(){
        $('.a,.abc').addClass('hideDiv');
        $('.ab').removeClass('hideDiv');
    }).mouseout(function() {
        $('.a').removeClass('hideDiv');
        $('.ab,.abc').addClass('hideDiv');
    });

    $("#s").mouseover(function(){
        $('.a,.ab').addClass('hideDiv');
        $('.abc').removeClass('hideDiv');
    }).mouseout(function() {
        $('.a').removeClass('hideDiv');
        $('.ab,.abc').addClass('hideDiv');
    });
});

css code:

.hideDiv
{
    display:none;
}

How do I check form validity with angularjs?

form

  • directive in module ng Directive that instantiates FormController.

If the name attribute is specified, the form controller is published onto the current scope under this name.

Alias: ngForm

In Angular, forms can be nested. This means that the outer form is valid when all of the child forms are valid as well. However, browsers do not allow nesting of elements, so Angular provides the ngForm directive which behaves identically to but can be nested. This allows you to have nested forms, which is very useful when using Angular validation directives in forms that are dynamically generated using the ngRepeat directive. Since you cannot dynamically generate the name attribute of input elements using interpolation, you have to wrap each set of repeated inputs in an ngForm directive and nest these in an outer form element.

CSS classes

ng-valid is set if the form is valid.

ng-invalid is set if the form is invalid.

ng-pristine is set if the form is pristine.

ng-dirty is set if the form is dirty.

ng-submitted is set if the form was submitted.

Keep in mind that ngAnimate can detect each of these classes when added and removed.

Submitting a form and preventing the default action

Since the role of forms in client-side Angular applications is different than in classical roundtrip apps, it is desirable for the browser not to translate the form submission into a full page reload that sends the data to the server. Instead some javascript logic should be triggered to handle the form submission in an application-specific way.

For this reason, Angular prevents the default action (form submission to the server) unless the element has an action attribute specified.

You can use one of the following two ways to specify what javascript method should be called when a form is submitted:

ngSubmit directive on the form element

ngClick directive on the first button or input field of type submit (input[type=submit])

To prevent double execution of the handler, use only one of the ngSubmit or ngClick directives.

This is because of the following form submission rules in the HTML specification:

If a form has only one input field then hitting enter in this field triggers form submit (ngSubmit) if a form has 2+ input fields and no buttons or input[type=submit] then hitting enter doesn't trigger submit if a form has one or more input fields and one or more buttons or input[type=submit] then hitting enter in any of the input fields will trigger the click handler on the first button or input[type=submit] (ngClick) and a submit handler on the enclosing form (ngSubmit).

Any pending ngModelOptions changes will take place immediately when an enclosing form is submitted. Note that ngClick events will occur before the model is updated.

Use ngSubmit to have access to the updated model.

app.js:

angular.module('formExample', [])
  .controller('FormController', ['$scope', function($scope) {
    $scope.userType = 'guest';
  }]);

Form:

<form name="myForm" ng-controller="FormController" class="my-form">
  userType: <input name="input" ng-model="userType" required>
  <span class="error" ng-show="myForm.input.$error.required">Required!</span>
  userType = {{userType}}
  myForm.input.$valid = {{myForm.input.$valid}}
  myForm.input.$error = {{myForm.input.$error}}
  myForm.$valid = {{myForm.$valid}}
  myForm.$error.required = {{!!myForm.$error.required}}
 </form>

Source: AngularJS: API: form

How can I check if string contains characters & whitespace, not just whitespace?

if (/^\s+$/.test(myString))
{
      //string contains only whitespace
}

this checks for 1 or more whitespace characters, if you it to also match an empty string then replace + with *.

How to get html table td cell value by JavaScript?

This is my solution

var cells = Array.prototype.slice.call(document.getElementById("tableI").getElementsByTagName("td"));
for(var i in cells){
    console.log("My contents is \"" + cells[i].innerHTML + "\"");
}

typeof !== "undefined" vs. != null

_x000D_
_x000D_
(function(){_x000D_
_x000D_
  var a= b = 3;_x000D_
  var ed = 103;_x000D_
  _x000D_
})();_x000D_
_x000D_
_x000D_
_x000D_
//console.log(ed); //ed is not defined_x000D_
_x000D_
console.log("a defined? " + (typeof a !== 'undefined')); //no define_x000D_
console.log("b defined? " + (typeof b !== 'undefined')); //yes define_x000D_
console.log(typeof(b)); //number_x000D_
console.log(typeof(4+7));   //number_x000D_
console.log(b); //3_x000D_
console.log(typeof("4"+"7")); //string_x000D_
var e= "ggg";_x000D_
console.log(typeof(e)); //string_x000D_
 var ty=typeof(b);_x000D_
console.log(ty); //number_x000D_
console.log(typeof false); //boolean_x000D_
console.log(typeof 1); //number_x000D_
console.log(typeof 0); //number_x000D_
console.log(typeof true); //boolean_x000D_
_x000D_
_x000D_
console.log(typeof Math.tan);  //function_x000D_
console.log(typeof function(){}); //function _x000D_
_x000D_
if(typeof neverDeclared == "undefined") //no errors_x000D_
if(typeof neverDeclared === "undefined") //no errors_x000D_
_x000D_
//if(neverDeclared == null) //showing error _x000D_
_x000D_
_x000D_
console.log(typeof {a:1}); //object_x000D_
console.log(typeof null); //object_x000D_
console.log(typeof JSON); //object_x000D_
console.log(typeof Math); //object_x000D_
console.log(typeof /a-z/); //object_x000D_
console.log(typeof new Date()); //object_x000D_
_x000D_
console.log(typeof afbc); //undefined_x000D_
//console.log(typeof new);//error_x000D_
_x000D_
document.write("<br> * oprator as math ");_x000D_
var r=14*"4";_x000D_
document.write(r);_x000D_
_x000D_
document.write("<br> + oprator as string ");_x000D_
var r=14+"44";_x000D_
document.write(r);_x000D_
_x000D_
document.write("<br> Minus Operator work as mathematic ");_x000D_
var r=64-"44";_x000D_
document.write(r);_x000D_
_x000D_
_x000D_
document.write("<br>");_x000D_
console.log(typeof(4*"7")); //returns number_x000D_
console.log(typeof(4+"7")); //returns string_x000D_
_x000D_
_x000D_
_x000D_
_x000D_
 
_x000D_
Interview Question in JavaScript
_x000D_
_x000D_
_x000D_

How to rename a file using Python

File may be inside a directory, in that case specify the path:

import os
old_file = os.path.join("directory", "a.txt")
new_file = os.path.join("directory", "b.kml")
os.rename(old_file, new_file)

Find if variable is divisible by 2

You can also:

if (x & 1)
 itsOdd();
else
 itsEven();

How to change resolution (DPI) of an image?

DPI should not be stored in an bitmap image file, as most sources of data for bitmaps render it meaningless.

A bitmap image is stored as pixels. Pixels have no inherent size in any respect. It's only at render time - be it monitor, printer, or automated crossstitching machine - that DPI matters.

A 800x1000 pixel bitmap image, printed at 100 dpi, turns into a nice 8x10" photo. Printed at 200 dpi, the EXACT SAME bitmap image turns into a 4x5" photo.

Capture an image with a digital camera, and what does DPI mean? It's certainly not the size of the area focused onto the CCD imager - that depends on the distance, and with NASA returning images of galaxies that are 100,000 light years across, and 2 million light years apart, in the same field of view, what kind of DPI do you get from THAT information?

Don't fall victim to the idea of the DPI of a bitmap image - it's a mistake. A bitmap image has no physical dimensions (save for a few micrometers of storage space in RAM or hard drive). It's only a displayed image, or a printed image, that has a physical size in inches, or millimeters, or furlongs.

Active Menu Highlight CSS

Maybe it is very very bad way and just for lazy person but I decided to say it.

I used PHP and bootstrap and fontawsome too

for simple I have 2 pages: 1.index and 2.create-user

put this code above your code

<?php
$name=basename($_SERVER["REQUEST_URI"]);
$name=str_replace(".php","",$name);
switch ($name) {
    case "create-user":
        $a = 2;
        break;
    case "index":
        $a = 1;
        break;
    default:
        $a=1;
}
?>

and in menu you add <?php if($a==1){echo "active";} ?> in class for menu1 and for menu2 you add <?php if($a==2){echo "active";} ?>

<ul id="menu" class="navbar-nav  flex-column text-right mt-3 p-1">
                        <li class="nav-item mb-2">
                            <a href="index.php" class="nav-link text-white customlihamid <?php if($a==1){echo "active";} ?>"><i
                                        class="fas fa-home fa-lg text-light ml-3"></i>dashbord</a>
                        </li>
                        <li class="nav-item mb-2">
                            <a href="#" href="javascript:" data-parent="#menu" data-toggle="collapse"
                               class="accordion-toggle nav-link text-white customlihamid <?php if($a==2){echo "active";} ?>" data-target="#tickets">
                                <i class="fas fa-user fa-lg text-light ml-3"></i>manage users
                                <span class="float-left"><i class="fas fa-angle-down"></i></span>
                            </a>

                            <ul class="collapse list-unstyled mt-2 mr-1 pr-2" id="tickets">
                                <li class="nav-item mb-2">
                                    <a href="create-user.php" class="nav-link text-white customlihamid"><i class="fas fa-user-plus fa-lg text-light ml-3"></i>add user</a>
                                </li>

                                <li class="nav-item mb-2">
                                    <a href="#" class="nav-link text-white customlihamid"><i class="fas fa-user-times fa-lg text-light ml-3"></i>delete user</a>
                                </li>

                            </ul>
                        </li>

                    </ul>

and add in css

.customlihamid {
    transition: all .4s;
}

.customlihamid:hover {
    background-color: #8a8a8a;
    border-radius: 5px;
    color: #00cc99;
}
.nav-item > .nav-link.active  {
    background-color: #00cc99;
    border-radius: 7px;
    box-shadow: 5px 7px 10px #111;
    transition: all .3s;
}
.nav-item > .nav-link.active:hover  {
    background-color: #8eccc1;
    border-radius: 7px;
    box-shadow: 5px 7px 20px #111;
    transform: translateY(-1px);
}

and in js add

$(document).ready(function () {
   $('.navbar-nav .nav-link').click(function(){
      $('.navbar-nav .nav-link').removeClass('active');
      $(this).addClass('active');
   })
});

first check your work without js code to understand js code for what

How to define an enumerated type (enum) in C?

If you declare the name for enumeration no error will occur.

If not declared, you have to use a typedef:

enum enum_name {RANDOM, IMMEDIATE, SEARCH} strategy;
strategy = IMMEDIATE;

It will not display an error...

How to compare arrays in JavaScript?

This simple solution works for me

function areEqual(a, b){
    let x = 0;
    for (n in a){
        if (a[n] == b[n]){x = 1;}
        else {x = 0};
    }
    return x;
}

a = [1,2,3];
b = [1,2,3];

> console.log(areEqual(a,b))

true

I used it in this simple real code application

_x000D_
_x000D_
<script>_x000D_
let corrette = [1];_x000D_
let risposte = [];_x000D_
_x000D_
function areEqual(a, b){_x000D_
 let x = 0;_x000D_
 for (n in a){_x000D_
  if (a[n] == b[n]){x = 1;}_x000D_
  else {x = 0};_x000D_
 }_x000D_
 if (x){console.log("The 2 arrays are equal")}_x000D_
 return x;_x000D_
}_x000D_
_x000D_
</script>_x000D_
_x000D_
Apporto di attrezzatura per cucina da parte del proprietario_x000D_
<button onclick="risposte[0]=1">Capitale proprio</button>_x000D_
<button onclick="risposte[0]=0">Capitale di debito</button>_x000D_
<button onclick="risposte[0]=0">Debito commerciale</button>_x000D_
_x000D_
<br><hr>_x000D_
<button onclick="if(areEqual(corrette,risposte)){controlla.innerHTML='Esatto'}else{controlla.innerHTML='No'}">Controlla le risposte</button>_x000D_
<div id="controlla"></div>
_x000D_
_x000D_
_x000D_

Generating a drop down list of timezones with PHP

I created a PHP class for this with a corresponding jQuery plugin. I've open-sourced it at https://github.com/peterjtracey/timezoneWidget - the PHP code is inspired by another stackoverflow answer, but I think much more elegant. The jQuery plugin gives a great interface for selecting a timezone.

How to show full object in Chrome console?

var gandalf = {
  "real name": "Gandalf",
  "age (est)": 11000,
  "race": "Maia",
  "haveRetirementPlan": true,
  "aliases": [
    "Greyhame",
    "Stormcrow",
    "Mithrandir",
    "Gandalf the Grey",
    "Gandalf the White"
  ]
};
//to console log object, we cannot use console.log("Object gandalf: " + gandalf);
console.log("Object gandalf: ");
//this will show object gandalf ONLY in Google Chrome NOT in IE
console.log(gandalf);
//this will show object gandalf IN ALL BROWSERS!
console.log(JSON.stringify(gandalf));
//this will show object gandalf IN ALL BROWSERS! with beautiful indent
console.log(JSON.stringify(gandalf, null, 4));

Multiple IF statements between number ranges

It's a little tricky because of the nested IFs but here is my answer (confirmed in Google Spreadsheets):

=IF(AND(A2>=0,    A2<500),  "Less than 500", 
 IF(AND(A2>=500,  A2<1000), "Between 500 and 1000", 
 IF(AND(A2>=1000, A2<1500), "Between 1000 and 1500", 
 IF(AND(A2>=1500, A2<2000), "Between 1500 and 2000", "Undefined"))))

Eclipse JUnit - possible causes of seeing "initializationError" in Eclipse window

For me the solution was one of the methods had to be void, I had it as Boolean.

Safe navigation operator (?.) or (!.) and null property paths

Another alternative that uses an external library is _.has() from Lodash.

E.g.

_.has(a, 'b.c')

is equal to

(a && a.b && a.b.c)

EDIT: As noted in the comments, you lose out on Typescript's type inference when using this method. E.g. Assuming that one's objects are properly typed, one would get a compilation error with (a && a.b && a.b.z) if z is not defined as a field of object b. But using _.has(a, 'b.z'), one would not get that error.

Create a hexadecimal colour based on a string with JavaScript

I wanted similar richness in colors for HTML elements, I was surprised to find that CSS now supports hsl() colors, so a full solution for me is below:

Also see How to automatically generate N "distinct" colors? for more alternatives more similar to this.

_x000D_
_x000D_
function colorByHashCode(value) {_x000D_
    return "<span style='color:" + value.getHashCode().intToHSL() + "'>" + value + "</span>";_x000D_
}_x000D_
String.prototype.getHashCode = function() {_x000D_
    var hash = 0;_x000D_
    if (this.length == 0) return hash;_x000D_
    for (var i = 0; i < this.length; i++) {_x000D_
        hash = this.charCodeAt(i) + ((hash << 5) - hash);_x000D_
        hash = hash & hash; // Convert to 32bit integer_x000D_
    }_x000D_
    return hash;_x000D_
};_x000D_
Number.prototype.intToHSL = function() {_x000D_
    var shortened = this % 360;_x000D_
    return "hsl(" + shortened + ",100%,30%)";_x000D_
};_x000D_
_x000D_
document.body.innerHTML = [_x000D_
  "javascript",_x000D_
  "is",_x000D_
  "nice",_x000D_
].map(colorByHashCode).join("<br/>");
_x000D_
span {_x000D_
  font-size: 50px;_x000D_
  font-weight: 800;_x000D_
}
_x000D_
_x000D_
_x000D_

In HSL its Hue, Saturation, Lightness. So the hue between 0-359 will get all colors, saturation is how rich you want the color, 100% works for me. And Lightness determines the deepness, 50% is normal, 25% is dark colors, 75% is pastel. I have 30% because it fit with my color scheme best.

Html: Difference between cell spacing and cell padding

Cellpadding is the amount of space between the outer edges of the table cell and the content of the cell.

Cellspacing is the amount of space in between the individual table cells.

More Details *Link 1*

Link 2

Link 3

Wipe data/Factory reset through ADB

After a lot of digging around I finally ended up downloading the source code of the recovery section of Android. Turns out you can actually send commands to the recovery.

 * The arguments which may be supplied in the recovery.command file:
 *   --send_intent=anystring - write the text out to recovery.intent
 *   --update_package=path - verify install an OTA package file
 *   --wipe_data - erase user data (and cache), then reboot
 *   --wipe_cache - wipe cache (but not user data), then reboot
 *   --set_encrypted_filesystem=on|off - enables / diasables encrypted fs

Those are the commands you can use according to the one I found but that might be different for modded files. So using adb you can do this:

adb shell
recovery --wipe_data

Using --wipe_data seemed to do what I was looking for which was handy although I have not fully tested this as of yet.

EDIT:

For anyone still using this topic, these commands may change based on which recovery you are using. If you are using Clockword recovery, these commands should still work. You can find other commands in /cache/recovery/command

For more information please see here: https://github.com/CyanogenMod/android_bootable_recovery/blob/cm-10.2/recovery.c

Passing an Object from an Activity to a Fragment

To pass an object to a fragment, do the following:

First store the objects in Bundle, don't forget to put implements serializable in class.

            CategoryRowFragment fragment = new CategoryRowFragment();

            // pass arguments to fragment
            Bundle bundle = new Bundle();

            // event list we want to populate
            bundle.putSerializable("eventsList", eventsList);

            // the description of the row
            bundle.putSerializable("categoryRow", categoryRow);

            fragment.setArguments(bundle);

Then retrieve bundles in Fragment

_x000D_
_x000D_
       // events that will be populated in this row_x000D_
        mEventsList = (ArrayList<Event>)getArguments().getSerializable("eventsList");_x000D_
_x000D_
        // description of events to be populated in this row_x000D_
        mCategoryRow = (CategoryRow)getArguments().getSerializable("categoryRow");
_x000D_
_x000D_
_x000D_

TypeError: 'list' object is not callable while trying to access a list

To get elements of a list you have to use list[i] instead of list(i).

Bootstrap select dropdown list placeholder

Using bootstrap, if you need to also add some values to the option to use for filters or other stuff you can simply add the class "bs-title-option" to the option that you want as a placeholder:

<select class="form-group">
   <option class="bs-title-option" value="myVal">My PlaceHolder</option>
   <option>A</option>
   <option>B</option>
   <option>c</option>
</select>

Bootstrap adds this class to the title attribute.

string.split - by multiple character delimiter

More fast way using directly a no-string array but a string:

string[] StringSplit(string StringToSplit, string Delimitator)
{
    return StringToSplit.Split(new[] { Delimitator }, StringSplitOptions.None);
}

StringSplit("E' una bella giornata oggi", "giornata");
/* Output
[0] "E' una bella giornata"
[1] " oggi"
*/

Should I use .done() and .fail() for new jQuery AJAX code instead of success and error

I want to add something on @Michael Laffargue's post:

jqXHR.done() is faster!

jqXHR.success() have some load time in callback and sometimes can overkill script. I find that on hard way before.

UPDATE:

Using jqXHR.done(), jqXHR.fail() and jqXHR.always() you can better manipulate with ajax request. Generaly you can define ajax in some variable or object and use that variable or object in any part of your code and get data faster. Good example:

/* Initialize some your AJAX function */
function call_ajax(attr){
    var settings=$.extend({
        call            : 'users',
        option          : 'list'
    }, attr );

    return $.ajax({
        type: "POST",
        url: "//exapmple.com//ajax.php",
        data: settings,
        cache : false
    });
}

/* .... Somewhere in your code ..... */

call_ajax({
    /* ... */
    id : 10,
    option : 'edit_user'
    change : {
          name : 'John Doe'
    }
    /* ... */
}).done(function(data){

    /* DO SOMETHING AWESOME */

});

ASP.NET Display "Loading..." message while update panel is updating

You can use code as below when

using Image as Loading

<asp:UpdateProgress id="updateProgress" runat="server">
    <ProgressTemplate>
        <div style="position: fixed; text-align: center; height: 100%; width: 100%; top: 0; right: 0; left: 0; z-index: 9999999; background-color: #000000; opacity: 0.7;">
            <asp:Image ID="imgUpdateProgress" runat="server" ImageUrl="~/images/ajax-loader.gif" AlternateText="Loading ..." ToolTip="Loading ..." style="padding: 10px;position:fixed;top:45%;left:50%;" />
        </div>
    </ProgressTemplate>
</asp:UpdateProgress>

using Text as Loading

<asp:UpdateProgress id="updateProgress" runat="server">
    <ProgressTemplate>
        <div style="position: fixed; text-align: center; height: 100%; width: 100%; top: 0; right: 0; left: 0; z-index: 9999999; background-color: #000000; opacity: 0.7;">
            <span style="border-width: 0px; position: fixed; padding: 50px; background-color: #FFFFFF; font-size: 36px; left: 40%; top: 40%;">Loading ...</span>
        </div>
    </ProgressTemplate>
</asp:UpdateProgress>

How to use FormData for AJAX file upload?

<form id="upload_form" enctype="multipart/form-data">

jQuery with CodeIgniter file upload:

var formData = new FormData($('#upload_form')[0]);

formData.append('tax_file', $('input[type=file]')[0].files[0]);

$.ajax({
    type: "POST",
    url: base_url + "member/upload/",
    data: formData,
    //use contentType, processData for sure.
    contentType: false,
    processData: false,
    beforeSend: function() {
        $('.modal .ajax_data').prepend('<img src="' +
            base_url +
            '"asset/images/ajax-loader.gif" />');
        //$(".modal .ajax_data").html("<pre>Hold on...</pre>");
        $(".modal").modal("show");
    },
    success: function(msg) {
        $(".modal .ajax_data").html("<pre>" + msg +
            "</pre>");
        $('#close').hide();
    },
    error: function() {
        $(".modal .ajax_data").html(
            "<pre>Sorry! Couldn't process your request.</pre>"
        ); // 
        $('#done').hide();
    }
});

you can use.

var form = $('form')[0]; 
var formData = new FormData(form);     
formData.append('tax_file', $('input[type=file]')[0].files[0]);

or

var formData = new FormData($('#upload_form')[0]);
formData.append('tax_file', $('input[type=file]')[0].files[0]); 

Both will work.

Nexus 7 not visible over USB via "adb devices" from Windows 7 x64

I'm using Nexus 7 (4.2) on Windows 7 x64. None of the other methods described here worked for me. The tab was already in PTP mode. Finally, I could get it working when I added the below line to 'android_winusb.inf' under <android-sdk>\extras\google\usb_driver and did an 'update driver':

%CompositeAdbInterface%     = USB_Install, USB\VID_18D1&PID_4E44&REV_9999&MI_01

To get the exact hardware ID (USB\VID_18D1&PID_4E44&REV_9999&MI_01 in my case), you can go to Computer Management -> Device Manager -> Details tab -> select Hardware Id from the drop-down.

Multiple values in single-value context

No, but that is a good thing since you should always handle your errors.

There are techniques that you can employ to defer error handling, see Errors are values by Rob Pike.

ew := &errWriter{w: fd}
ew.write(p0[a:b])
ew.write(p1[c:d])
ew.write(p2[e:f])
// and so on
if ew.err != nil {
    return ew.err
}

In this example from the blog post he illustrates how you could create an errWriter type that defers error handling till you are done calling write.

Something like 'contains any' for Java set?

I would recommend creating a HashMap from set A, and then iterating through set B and checking if any element of B is in A. This would run in O(|A|+|B|) time (as there would be no collisions), whereas retainAll(Collection<?> c) must run in O(|A|*|B|) time.

CSS: how to add white space before element's content?

You can use the unicode of a non breaking space :

p:before { content: "\00a0 "; }

See JSfiddle demo

[style improved by @Jason Sperske]

Escape text for HTML

there are some special quotes characters which are not removed by HtmlEncode and will not be displayed in Edge or IE correctly like ” and “ . you can extent replacing these characters with something like below function.

private string RemoveJunkChars(string input)
{
    return HttpUtility.HtmlEncode(input.Replace("”", "\"").Replace("“", "\""));
}

SSRS custom number format

Have you tried with the custom format "#,##0.##" ?

Java regex to extract text between tags

I prefix this reply with "you shouldn't use a regular expression to parse XML -- it's only going to result in edge cases that don't work right, and a forever-increasing-in-complexity regex while you try to fix it."

That being said, you need to proceed by matching the string and grabbing the group you want:

if (m.matches())
{
   String result = m.group(1);
   // do something with result
}