I think this is what you are trying to do

$array = array('lastname', 'email', 'phone');
echo "'" . implode("','", explode(',', $array)) . "'";

very simple go for this

$str;
foreach ($arrays as $arr) {
$str .= $arr["tag_name"] . ",";
}
$str = trim($str, ',');//removes the final comma 

Array.join is what you need, but if you like, the friendly people at phpjs.org have created implode for you.

Then some slightly off topic ranting. As @jon_darkstar alreadt pointed out, jQuery is JavaScript and not vice versa. You don't need to know JavaScript to be able to understand how to use jQuery, but it certainly doesn't hurt and once you begin to appreciate reusability or start looking at the bigger picture you absolutely need to learn it.

You can use http_build_query() to do that.

Generates a URL-encoded query string from the associative (or indexed) array provided.

You could use http_build_query, like this:

<?php
  $a=array("item1"=>"object1", "item2"=>"object2");
  echo http_build_query($a,'',', ');
?>

Output:

item1=object1, item2=object2 

Demo

The short answer is for creating an attribute in c# you only need to inherit it from Attribute class, Just this :)

But here I'm going to explain attributes in detail:

basically attributes are classes that we can use them for applying our logic to assemblies, classes, methods, properties, fields, ...

In .Net, Microsoft has provided some predefined Attributes like Obsolete or Validation Attributes like ( [Required], [StringLength(100)], [Range(0, 999.99)]), also we have kind of attributes like ActionFilters in asp.net that can be very useful for applying our desired logic to our codes (read this article about action filters if you are passionate to learn it)

one another point, you can apply a kind of configuration on your attribute via AttibuteUsage.

  [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, AllowMultiple = true)]

When you decorate an attribute class with AttributeUsage you can tell to c# compiler where I'm going to use this attribute: I'm going to use this on classes, on assemblies on properties or on ... and my attribute is allowed to use several times on defined targets(classes, assemblies, properties,...) or not?!

After this definition about attributes I'm going to show you an example: Imagine we want to define a new lesson in university and we want to allow just admins and masters in our university to define a new Lesson, Ok?

namespace ConsoleApp1
{
    /// <summary>
    /// All Roles in our scenario
    /// </summary>
    public enum UniversityRoles
    {
        Admin,
        Master,
        Employee,
        Student
    }

    /// <summary>
    /// This attribute will check the Max Length of Properties/fields
    /// </summary>
    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, AllowMultiple = true)]
    public class ValidRoleForAccess : Attribute
    {
        public ValidRoleForAccess(UniversityRoles role)
        {
            Role = role;
        }
        public UniversityRoles Role { get; private set; }

    }


    /// <summary>
    /// we suppose that just admins and masters can define new Lesson
    /// </summary>
    [ValidRoleForAccess(UniversityRoles.Admin)]
    [ValidRoleForAccess(UniversityRoles.Master)]
    public class Lesson
    {
        public Lesson(int id, string name, DateTime startTime, User owner)
        {
            var lessType = typeof(Lesson);
            var validRolesForAccesses = lessType.GetCustomAttributes<ValidRoleForAccess>();

            if (validRolesForAccesses.All(x => x.Role.ToString() != owner.GetType().Name))
            {
                throw new Exception("You are not Allowed to define a new lesson");
            }
            
            Id = id;
            Name = name;
            StartTime = startTime;
            Owner = owner;
        }
        public int Id { get; private set; }
        public string Name { get; private set; }
        public DateTime StartTime { get; private set; }

        /// <summary>
        /// Owner is some one who define the lesson in university website
        /// </summary>
        public User Owner { get; private set; }

    }

    public abstract class User
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public DateTime DateOfBirth { get; set; }
    }


    public class Master : User
    {
        public DateTime HireDate { get; set; }
        public Decimal Salary { get; set; }
        public string Department { get; set; }
    }

    public class Student : User
    {
        public float GPA { get; set; }
    }



    class Program
    {
        static void Main(string[] args)
        {

            #region  exampl1

            var master = new Master()
            {
                Name = "Hamid Hasani",
                Id = 1,
                DateOfBirth = new DateTime(1994, 8, 15),
                Department = "Computer Engineering",
                HireDate = new DateTime(2018, 1, 1),
                Salary = 10000
            };
            var math = new Lesson(1, "Math", DateTime.Today, master);

            #endregion

            #region exampl2
            var student = new Student()
            {
                Name = "Hamid Hasani",
                Id = 1,
                DateOfBirth = new DateTime(1994, 8, 15),
                GPA = 16
            };
            var literature = new Lesson(2, "literature", DateTime.Now.AddDays(7), student);
            #endregion

            ReadLine();
        }
    }


}

In the real world of programming maybe we don't use this approach for using attributes and I said this because of its educational point in using attributes

It's not a direct answer to the question but you could just use the OR-operator

( grep "#SystemMaxUse=" journald.conf > /dev/null && sed -i 's/\#SystemMaxUse=/SystemMaxUse=50M/g' journald.conf ) || echo "This file has been edited. You'll need to do it manually."

I use fetchObject() here a small example using Symfony 4.4

    <?php 
    use Doctrine\DBAL\Driver\Connection;

    class MyController{

    public function index($username){
      $queryBuilder = $connection->createQueryBuilder();
      $queryBuilder
        ->select('id', 'name')
        ->from('app_user')
        ->where('name = ?')
        ->setParameter(0, $username)
        ->setMaxResults(1);
      $stmUser = $queryBuilder->execute();

      dump($stmUser->fetchObject());

      //get_class_methods($stmUser) -> to see all methods
    }
  }

Response:

{ 
"id": "2", "name":"myuser"
}

I have followed a different approach to solve pretty much the same problem, in my case, I made a new extension that adds PHP syntax highlighting support for Drupal-specific files (such as .module and .inc): https://github.com/mastazi/VS-code-drupal

As you can see in the code, I created a new extension rather than modifying the existing PHP extension. Obviously I declare a dependency on the PHP extension in the Drupal extension.

The advantage of doing it this way is that if there is an update to the PHP extension, my custom support for Drupal doesn't get lost in the update process.

Why don't you try the fadeIn() instead of using a show() with delay(). I think what you are trying to do can be done with this. Here is the jQuery code for fadeIn and FadeOut() which also has inbuilt method for delaying the process.

$(document).ready(function(){
   $('element').click(function(){
      //effects take place in 3000ms
      $('element_to_hide').fadeOut(3000);
      $('element_to_show').fadeIn(3000);
   });
}

<span style="color:orange;">orange text</span>

Is the only way I know of barring the font tag.

I am using excelcnv.exe to convert csv into xlsx and that seemed to work properly. You will have to change the directory to where your excelcnv is. If 32 bit, it goes to Program Files (x86)

Start-Process -FilePath 'C:\Program Files\Microsoft Office\root\Office16\excelcnv.exe' -ArgumentList "-nme -oice ""$xlsFilePath"" ""$xlsToxlsxPath"""

There was same issue with me
In my case, steps are as below-

1. Removed all file which was being start with U (unmerged) symbol. as-

U   project/app/pages/file1/file.ts
U   project/www/assets/file1/file-name.html

2. Pull code from master

$ git pull origin master

3. Checked for status

 $ git status

Here is the message which It appeared-
and have 2 and 1 different commit each, respectively.
(use "git pull" to merge the remote branch into yours)
You have unmerged paths.
(fix conflicts and run "git commit")

Unmerged paths:
(use "git add ..." to mark resolution)

both modified:   project/app/pages/file1/file.ts
both modified:   project/www/assets/file1/file-name.html

4. Added all new changes -

    $ git add project/app/pages/file1/file.ts
project/www/assets/file1/file-name.html

5. Commit changes on head-

$ git commit -am "resolved conflict of the app."

6. Pushed the code -

$ git push origin master

Which turn may issue resolved with this image -

I think you are not configured properly,

if you are using XAMPP then you can easily send mail from localhost.

for example you can configure C:\xampp\php\php.ini and c:\xampp\sendmail\sendmail.ini for gmail to send mail.

in C:\xampp\php\php.ini find extension=php_openssl.dll and remove the semicolon from the beginning of that line to make SSL working for gmail for localhost.

in php.ini file find [mail function] and change

SMTP=smtp.gmail.com
smtp_port=587
sendmail_from = [email protected]
sendmail_path = "C:\xampp\sendmail\sendmail.exe -t"

(use the above send mail path only and it will work)

Now Open C:\xampp\sendmail\sendmail.ini. Replace all the existing code in sendmail.ini with following code

[sendmail]

smtp_server=smtp.gmail.com
smtp_port=587
error_logfile=error.log
debug_logfile=debug.log
[email protected]
auth_password=my-gmail-password
[email protected]

Now you have done!! create php file with mail function and send mail from localhost.

Update

First, make sure you PHP installation has SSL support (look for an "openssl" section in the output from phpinfo()).

You can set the following settings in your PHP.ini:

ini_set("SMTP","ssl://smtp.gmail.com");
ini_set("smtp_port","465");

You can't serialize a class that implements IDictionary. Check out this link.

Q: Why can't I serialize hashtables?

A: The XmlSerializer cannot process classes implementing the IDictionary interface. This was partly due to schedule constraints and partly due to the fact that a hashtable does not have a counterpart in the XSD type system. The only solution is to implement a custom hashtable that does not implement the IDictionary interface.

So I think you need to create your own version of the Dictionary for this. Check this other question.

For some odd reason this DID NOT work (using Pandas: '0.25.1')

df[['col1', 'col2']].fillna(value=0, inplace=True)

Another solution:

subset_cols = ['col1','col2']
[df[col].fillna(0, inplace=True) for col in subset_cols]

Example:

df = pd.DataFrame(data={'col1':[1,2,np.nan,], 'col2':[1,np.nan,3], 'col3':[np.nan,2,3]})

output:

   col1  col2  col3
0  1.00  1.00   nan
1  2.00   nan  2.00
2   nan  3.00  3.00

Apply list comp. to fillna values:

subset_cols = ['col1','col2']
[df[col].fillna(0, inplace=True) for col in subset_cols]

Output:

   col1  col2  col3
0  1.00  1.00   nan
1  2.00  0.00  2.00
2  0.00  3.00  3.00

for first 10 rows...

SELECT * FROM msgtable WHERE cdate='18/07/2012' LIMIT 0,10

for next 10 rows

SELECT * FROM msgtable WHERE cdate='18/07/2012' LIMIT 10,10

This is a bit late in the day for suggesting this, given how long ago the original question was posted, but this is what I did.

I needed a range of 70 years, which, while not as much as 100, is still too many years for the visitor to scroll through. (jQuery does step through year in groups, but that's a pain in the patootie for most people.)

The first step was to modify the JavaScript for the datepicker widget: Find this code in jquery-ui.js or jquery-ui-min.js (where it will be minimized):

for (a.yearshtml+='<select class="ui-datepicker-year" onchange="DP_jQuery_'+y+".datepicker._selectMonthYear('#"+
a.id+"', this, 'Y');\" onclick=\"DP_jQuery_"+y+".datepicker._clickMonthYear('#"+a.id+"');\">";b<=g;b++)
 a.yearshtml+='<option value="'+b+'"'+(b==c?' selected="selected"':"")+">"+b+"</option>";
a.yearshtml+="</select>";

And replace it with this:

a.yearshtml+='<select class="ui-datepicker-year" onchange="DP_jQuery_'+y+
 ".datepicker._selectMonthYear('#"+a.id+"', this, 'Y');
 \" onclick=\"DP_jQuery_"+y+".datepicker._clickMonthYear('#"+a.id+"');
 \">";
for(opg=-1;b<=g;b++) {
    a.yearshtml+=((b%10)==0 || opg==-1 ?
        (opg==1 ? (opg=0, '</optgroup>') : '')+
        (b<(g-10) ? (opg=1, '<optgroup label="'+b+' >">') : '') : '')+
        '<option value="'+b+'"'+(b==c?' selected="selected"':"")+">"+b+"</option>";
}
a.yearshtml+="</select>";

This surrounds the decades (except for the current) with OPTGROUP tags.

Next, add this to your CSS file:

.ui-datepicker OPTGROUP { font-weight:normal; }
.ui-datepicker OPTGROUP OPTION { display:none; text-align:right; }
.ui-datepicker OPTGROUP:hover OPTION { display:block; }

This hides the decades until the visitor mouses over the base year. Your visitor can scroll through any number of years quickly.

Feel free to use this; just please give proper attribution in your code.

db.collection.find().hint( { $natural : -1 } ).sort(field: 1/-1).limit(n)

according to mongoDB Documentation:

You can specify { $natural : 1 } to force the query to perform a forwards collection scan.

You can also specify { $natural : -1 } to force the query to perform a reverse collection scan.

It seems your @ComponentScan annotation is not set properly. Try :

@ComponentScan(basePackages = {"com.pharmacy"})

Actually you do not need the component scan if you have your main class at the top of the structure, for example directly under com.pharmacy package.

Also, you don't need both

@SpringBootApplication
@EnableAutoConfiguration

The @SpringBootApplication annotation includes @EnableAutoConfiguration by default.

read returns an empty string when EOF is encountered. Docs are here.

There is actually a way to do this with html only. Just sets:

<img src="#" width height="50%">

Just trying to make it as easy as possible see code below:

- (void)viewDidLoad
{
   [self appWillEnterForeground]; //register For Application Will enterForeground
}


- (id)appWillEnterForeground{ //Application will enter foreground.

    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(allFunctions)
                                                 name:UIApplicationWillEnterForegroundNotification
                                               object:nil];
    return self;
}


-(void) allFunctions{ //call any functions that need to be run when application will enter foreground 
    NSLog(@"calling all functions...application just came back from foreground");


}

You can use this:

function sanitize(string) {
  const map = {
      '&': '&',
      '<': '&lt;',
      '>': '&gt;',
      '"': '&quot;',
      "'": '&#x27;',
      "/": '&#x2F;',
  };
  const reg = /[&<>"'/]/ig;
  return string.replace(reg, (match)=>(map[match]));
}

Also see OWASP XSS Prevention Cheat Sheet.

I had the same issue every time I tried to create a new project, but based on the console output, it was because of two versions of android-support-v4 that were different:

[2014-10-29 16:31:57 - HeadphoneSplitter] Found 2 versions of android-support-v4.jar in the dependency list,
[2014-10-29 16:31:57 - HeadphoneSplitter] but not all the versions are identical (check is based on SHA-1 only at this time).
[2014-10-29 16:31:57 - HeadphoneSplitter] All versions of the libraries must be the same at this time.
[2014-10-29 16:31:57 - HeadphoneSplitter] Versions found are:
[2014-10-29 16:31:57 - HeadphoneSplitter] Path: C:\Users\jbaurer\workspace\appcompat_v7\libs\android-support-v4.jar
[2014-10-29 16:31:57 - HeadphoneSplitter]   Length: 627582
[2014-10-29 16:31:57 - HeadphoneSplitter]   SHA-1: cb6883d96005bc85b3e868f204507ea5b4fa9bbf
[2014-10-29 16:31:57 - HeadphoneSplitter] Path: C:\Users\jbaurer\workspace\HeadphoneSplitter\libs\android-support-v4.jar
[2014-10-29 16:31:57 - HeadphoneSplitter]   Length: 758727
[2014-10-29 16:31:57 - HeadphoneSplitter]   SHA-1: efec67655f6db90757faa37201efcee2a9ec3507
[2014-10-29 16:31:57 - HeadphoneSplitter] Jar mismatch! Fix your dependencies

I don't know a lot about Eclipse. but I simply deleted the copy of the jar file from my project's libs folder so that it would use the appcompat_v7 jar file instead. This fixed my issue.

I tried this and it worked:

Object obj = 10;
String str = obj.toString(); 
double d = Double.valueOf(str).doubleValue();

Using Ref forwarding you can pass the ref from parent to further down to a child.

const FancyButton = React.forwardRef((props, ref) => (
  <button ref={ref} className="FancyButton">
    {props.children}
  </button>
));

// You can now get a ref directly to the DOM button:
const ref = React.createRef();
<FancyButton ref={ref}>Click me!</FancyButton>;

1. Create a React ref by calling React.createRef and assign it to a ref variable.
2. Pass your ref down to by specifying it as a JSX attribute.
3. React passes the ref to the (props, ref) => ... function inside forwardRef as a second argument.
4. Forward this ref argument down to by specifying it as a JSX attribute.
5. When the ref is attached, ref.current will point to the DOM node.

Note The second ref argument only exists when you define a component with React.forwardRef call. Regular functional or class components don’t receive the ref argument, and ref is not available in props either.

Ref forwarding is not limited to DOM components. You can forward refs to class component instances, too.

Reference: React Documentation.

Query all users and filter by the list from your text file:

$Users = Get-Content 'C:\scripts\Users.txt'
Get-ADUser -Filter '*' -Properties DisplayName,Office |
    Where-Object { $Users -contains $_.SamAccountName } |
    Select-Object DisplayName, Office |
    Export-Csv 'C:\path\to\your.csv' -NoType

Get-ADUser -Filter '*' returns all AD user accounts. This stream of user objects is then piped into a Where-Object filter, which checks for each object if its SamAccountName property is contained in the user list from your input file ($Users). Only objects with a matching account name are passed forward to the next step of the pipeline. The output can be limited by selecting the relevant properties before exporting the data.

You can further optimize the code by replacing the -contains operator with hashtable lookups:

$Users = @{}
Get-Content 'C:\scripts\Users.txt' | ForEach-Object { $Users[$_] = $true }

Get-ADUser -Filter '*' -Properties DisplayName,Office |
    Where-Object { $Users.ContainsKey($_.SamAccountName) } |
    Select-Object DisplayName, Office |
    Export-Csv 'C:\path\to\your.csv' -NoType

export CLASSPATH=/home/appnetix/LOG4J_HOME/log4j-1.2.16.jar

or, if you already have some classpath set

export CLASSPATH=$CLASSPATH:/home/appnetix/LOG4J_HOME/log4j-1.2.16.jar

and, if also you want to include current directory

export CLASSPATH=$CLASSPATH:/home/appnetix/LOG4J_HOME/log4j-1.2.16.jar:.

If you are working with Windows and Visual Studio 2015

• Install miniconda http://conda.pydata.org/miniconda.html
• Change your python environment to python 3.4 (32bit)
• click on python environment 3.4 and open cmd

Enter the following commands

• "conda install numpy"
• "conda install pandas"
• "conda install scipy"

I know this is an old question, but I thought I'd present one more solution that could be used if you'd like to avoid using named function expressions. (Not saying you should or should not avoid them, just presenting another solution)

  var fn = (function() {
    var innerFn = function(counter) {
      console.log(counter);

      if(counter > 0) {
        innerFn(counter-1);
      }
    };

    return innerFn;
  })();

  console.log("running fn");
  fn(3);

  var copyFn = fn;

  console.log("running copyFn");
  copyFn(3);

  fn = function() { console.log("done"); };

  console.log("fn after reassignment");
  fn(3);

  console.log("copyFn after reassignment of fn");
  copyFn(3);

you can set shortcut key F12 easy!!!

{ "keys": ["f12"], "command": "reindent" , "args": { "single_line": false } }

see detail here.

>>> import subprocess
>>> subprocess.call('echo $HOME')
Traceback (most recent call last):
...
OSError: [Errno 2] No such file or directory
>>>
>>> subprocess.call('echo $HOME', shell=True)
/user/khong
0

Setting the shell argument to a true value causes subprocess to spawn an intermediate shell process, and tell it to run the command. In other words, using an intermediate shell means that variables, glob patterns, and other special shell features in the command string are processed before the command is run. Here, in the example, $HOME was processed before the echo command. Actually, this is the case of command with shell expansion while the command ls -l considered as a simple command.

source: Subprocess Module

cat | git log --author="authorName" > author_commits_details.txt

This gives your commits in text format.

This is how you can do it. This code assumes the existance of a buffered image called 'image' (like your comment says)

// The required drawing location
int drawLocationX = 300;
int drawLocationY = 300;

// Rotation information

double rotationRequired = Math.toRadians (45);
double locationX = image.getWidth() / 2;
double locationY = image.getHeight() / 2;
AffineTransform tx = AffineTransform.getRotateInstance(rotationRequired, locationX, locationY);
AffineTransformOp op = new AffineTransformOp(tx, AffineTransformOp.TYPE_BILINEAR);

// Drawing the rotated image at the required drawing locations
g2d.drawImage(op.filter(image, null), drawLocationX, drawLocationY, null);

But can I abort a Task (in .Net 4.0) in the same way not by cancellation mechanism. I want to kill the Task immediately.

Other answerers have told you not to do it. But yes, you can do it. You can supply Thread.Abort() as the delegate to be called by the Task's cancellation mechanism. Here is how you could configure this:

class HardAborter
{
  public bool WasAborted { get; private set; }
  private CancellationTokenSource Canceller { get; set; }
  private Task<object> Worker { get; set; }

  public void Start(Func<object> DoFunc)
  {
    WasAborted = false;

    // start a task with a means to do a hard abort (unsafe!)
    Canceller = new CancellationTokenSource();

    Worker = Task.Factory.StartNew(() => 
      {
        try
        {
          // specify this thread's Abort() as the cancel delegate
          using (Canceller.Token.Register(Thread.CurrentThread.Abort))
          {
            return DoFunc();
          }
        }
        catch (ThreadAbortException)
        {
          WasAborted = true;
          return false;
        }
      }, Canceller.Token);
  }

  public void Abort()
  {
    Canceller.Cancel();
  }

}

disclaimer: don't do this.

Here is an example of what not to do:

 var doNotDoThis = new HardAborter();

 // start a thread writing to the console
 doNotDoThis.Start(() =>
    {
       while (true)
       {
          Thread.Sleep(100);
          Console.Write(".");
       }
       return null;
    });


 // wait a second to see some output and show the WasAborted value as false
 Thread.Sleep(1000);
 Console.WriteLine("WasAborted: " + doNotDoThis.WasAborted);

 // wait another second, abort, and print the time
 Thread.Sleep(1000);
 doNotDoThis.Abort();
 Console.WriteLine("Abort triggered at " + DateTime.Now);

 // wait until the abort finishes and print the time
 while (!doNotDoThis.WasAborted) { Thread.CurrentThread.Join(0); }
 Console.WriteLine("WasAborted: " + doNotDoThis.WasAborted + " at " + DateTime.Now);

 Console.ReadKey();

To answer your question and on all variable substitutions

echo "$\{var}"
echo "Substitute the value of var."


echo "$\{var:-word}"
echo "If var is null or unset, word is substituted for var. The value of var does not change."


echo "$\{var:=word}"
echo "If var is null or unset, var is set to the value of word."


echo "$\{var:?message}"
echo "If var is null or unset, message is printed to standard error. This checks that variables are set correctly."


echo "$\{var:+word}"
echo "If var is set, word is substituted for var. The value of var does not change."

SELECT * 
INTO NewTable
FROM OldTable
WHERE 1 = 2

I use SyntaxHighlighter with my Blogger powered blog. The actual site is hosted on my own server rather than Blogger's though (Blogger has an option of ftping posts to your own site), but having your own domain and web hosting only costs a couple of dollars a month.

You cant add add items in string array more than its size, i'll suggest you to use ArrayList you can add items dynamically at run time in arrayList if you feel any problem you can freely ask

This should be performant, thread-safe and flexible enough for many uses:

#include <random>
#include <iostream>

template<typename Numeric, typename Generator = std::mt19937>
Numeric random(Numeric from, Numeric to)
{
    thread_local static Generator gen(std::random_device{}());

    using dist_type = typename std::conditional
    <
        std::is_integral<Numeric>::value
        , std::uniform_int_distribution<Numeric>
        , std::uniform_real_distribution<Numeric>
    >::type;

    thread_local static dist_type dist;

    return dist(gen, typename dist_type::param_type{from, to});
}

int main(int, char*[])
{
    for(auto i = 0U; i < 20; ++i)
        std::cout << random<double>(0.0, 0.3) << '\n';
}

we can use target = blank to open in new tab

 <a href="https://www.google.co.in/" target="blank">click Here </a>

  func clear_btn(box_is : UITextField){
    box_is.clearButtonMode = .always
    if let clearButton = box_is.value(forKey: "_clearButton") as? UIButton {
        let templateImage =  clearButton.imageView?.image?.withRenderingMode(.alwaysTemplate)

        clearButton.setImage(templateImage, for: .normal)
        clearButton.setImage(templateImage, for: .highlighted)

        clearButton.tintColor = .white

     }
}

You need its pid... use "ps -A" to find it.

For normal users. Open the inspect window of current page. And type in:

l = document.getElementsByTagName("a");
for (var i =0; i<l.length; i++) {
    l[i].href = "";
}

Then you shall not see the url links in print preview.

Try this php code.

<?PHP

function getUserIP()
{
    // Get real visitor IP behind CloudFlare network
    if (isset($_SERVER["HTTP_CF_CONNECTING_IP"])) {
              $_SERVER['REMOTE_ADDR'] = $_SERVER["HTTP_CF_CONNECTING_IP"];
              $_SERVER['HTTP_CLIENT_IP'] = $_SERVER["HTTP_CF_CONNECTING_IP"];
    }
    $client  = @$_SERVER['HTTP_CLIENT_IP'];
    $forward = @$_SERVER['HTTP_X_FORWARDED_FOR'];
    $remote  = $_SERVER['REMOTE_ADDR'];

    if(filter_var($client, FILTER_VALIDATE_IP))
    {
        $ip = $client;
    }
    elseif(filter_var($forward, FILTER_VALIDATE_IP))
    {
        $ip = $forward;
    }
    else
    {
        $ip = $remote;
    }

    return $ip;
}


$user_ip = getUserIP();

echo $user_ip; // Output IP address [Ex: 177.87.193.134]


?>

I have just tested the following pipeline and it works

parallel firstBranch: {
    stage ('Starting Test') 
    {
        build job: 'test1', parameters: [string(name: 'Environment', value: "$env.Environment")]
    }
}, secondBranch: {
    stage ('Starting Test2') 
    {
        build job: 'test2', parameters: [string(name: 'Environment', value: "$env.Environment")]
    }
}

This Job named 'trigger-test' accepts one parameter named 'Environment'

Job 'test1' and 'test2' are simple jobs:

Example for 'test1'

• One parameter named 'Environment'
• Pipeline : echo "$env.Environment-TEST1"

On execution, I am able to see both stages running in the same time

There is a difference between modulus and remainder. For example:

-21 mod 4 is 3 because -21 + 4 x 6 is 3.

But -21 divided by 4 gives -5 with a remainder of -1.

For positive values, there is no difference.

Try

yum list installed | grep reponame

On one of my servers:

yum list installed | grep remi
ImageMagick2.x86_64                       6.6.5.10-1.el5.remi          installed
memcache.x86_64                          1.4.5-2.el5.remi             installed
mysql.x86_64                              5.1.54-1.el5.remi            installed
mysql-devel.x86_64                        5.1.54-1.el5.remi            installed
mysql-libs.x86_64                         5.1.54-1.el5.remi            installed
mysql-server.x86_64                       5.1.54-1.el5.remi            installed
mysqlclient15.x86_64                      5.0.67-1.el5.remi            installed
php.x86_64                                5.3.5-1.el5.remi             installed
php-cli.x86_64                            5.3.5-1.el5.remi             installed
php-common.x86_64                         5.3.5-1.el5.remi             installed
php-domxml-php4-php5.noarch               1.21.2-1.el5.remi            installed
php-fpm.x86_64                            5.3.5-1.el5.remi             installed
php-gd.x86_64                             5.3.5-1.el5.remi             installed
php-mbstring.x86_64                       5.3.5-1.el5.remi             installed
php-mcrypt.x86_64                         5.3.5-1.el5.remi             installed
php-mysql.x86_64                          5.3.5-1.el5.remi             installed
php-pdo.x86_64                            5.3.5-1.el5.remi             installed
php-pear.noarch                           1:1.9.1-6.el5.remi           installed
php-pecl-apc.x86_64                       3.1.6-1.el5.remi             installed
php-pecl-imagick.x86_64                   3.0.1-1.el5.remi.1           installed
php-pecl-memcache.x86_64                  3.0.5-1.el5.remi             installed
php-pecl-xdebug.x86_64                    2.1.0-1.el5.remi             installed
php-soap.x86_64                           5.3.5-1.el5.remi             installed
php-xml.x86_64                            5.3.5-1.el5.remi             installed
remi-release.noarch                       5-8.el5.remi                 installed

It works.

If the array element is not integer you can use something like below :

$skus  = array('LDRES10','LDRES12','LDRES11');   //sample data

if(!empty($skus)){     
    $sql = "SELECT * FROM `products` WHERE `prodCode` IN ('" . implode("','", $skus) . "') "      
}

In case Translate works locally but not remotly e.i group.Translate(typeof(NTAccount)

If you want to have the application code executes using the LOGGED IN USER identity, then enable impersonation. Impersonation can be enabled thru IIS or by adding the following element in the web.config.

<system.web>
<identity impersonate="true"/>

If impersonation is enabled, the application executes using the permissions found in your user account. So if the logged in user has access, to a specific network resource, only then will he be able to access that resource thru the application.

Thank PRAGIM tech for this information from his diligent video

Windows authentication in asp.net Part 87:

https://www.youtube.com/watch?v=zftmaZ3ySMc

But impersonation creates a lot of overhead on the server

The best solution to allow users of certain network groups is to deny anonymous in the web config <authorization><deny users="?"/><authentication mode="Windows"/>

and in your code behind, preferably in the global.asax, use the HttpContext.Current.User.IsInRole :

Sub Session_Start(ByVal sender As Object, ByVal e As EventArgs)
If HttpContext.Current.User.IsInRole("TheDomain\TheGroup") Then
//code to do when user is in group
End If

NOTE: The Group must be written with a backslash \ i.e. "TheDomain\TheGroup"

You can download IE Driver (both 32 and 64-bit) from Selenium official site: http://docs.seleniumhq.org/download/

32 bit Windows IE

64 bit Windows IE

IE Driver is also available in the following site:

http://selenium-release.storage.googleapis.com/index.html

Nanotime is in fact not even good for elapsed time because it drifts away signficantly more than currentTimeMillis. Furthermore nanotime tends to provide excessive precision at the expense of accuracy. It is therefore highly inconsistent,and needs refinement.

For any time measuring process,currentTimeMillis (though almost as bad), does better in terms of balancing accuracy and precision.

1. Create a state property for the default option text in the constructor
   • Don't worry about the default option value
2. Add an option tag to the render function. Only show using state and ternary expression
3. Create a function to handle when an option was selected

4. Change the state of the default option value in this event handler function to null

   Class MySelect extends React.Component
   {
       constructor()
       {
           super()
           this.handleChange = this.handleChange.bind(this);
           this.state = {
               selectDefault: "Select An Option"
           }
       }
       handleChange(event)
       {
           const selectedValue = event.target.value;
           //do something with selectedValue
           this.setState({
               selectDefault: null
           });
       }
       render()
       {
           return (
           <select name="selectInput" id="selectInput" onChange={this.handleChange} value= 
               {this.selectedValue}>
            {this.state.selectDefault ? <option>{this.state.selectDefault}</option> : ''}
               {'map list or static list of options here'}
           </select>
           )
       }
   }
   

you can invoke it using window.function_name() or directly function_name()

Use FLOOR(), if you want to round your decimal to the lower integer. Examples:

FLOOR(1.9) => 1
FLOOR(1.1) => 1

Use ROUND(), if you want to round your decimal to the nearest integer. Examples:

ROUND(1.9) => 2
ROUND(1.1) => 1

Use CEIL(), if you want to round your decimal to the upper integer. Examples:

CEIL(1.9) => 2
CEIL(1.1) => 2

try

.insertAfter()

here

$(content).insertAfter('#bla');

Building on the answers on this page I would add that you have to be aware that each RUN statement runs independently of the others with /bin/sh -c and therefore won't get any environment vars that would normally be sourced in login shells.

The best way I have found so far is to add the script to /etc/bash.bashrc and then invoke each command as bash login.

RUN echo "source /usr/local/bin/virtualenvwrapper.sh" >> /etc/bash.bashrc
RUN /bin/bash --login -c "your command"

You could for instance install and setup virtualenvwrapper, create the virtual env, have it activate when you use a bash login, and then install your python modules into this env:

RUN pip install virtualenv virtualenvwrapper
RUN mkdir -p /opt/virtualenvs
ENV WORKON_HOME /opt/virtualenvs
RUN echo "source /usr/local/bin/virtualenvwrapper.sh" >> /etc/bash.bashrc
RUN /bin/bash --login -c "mkvirtualenv myapp"
RUN echo "workon mpyapp" >> /etc/bash.bashrc
RUN /bin/bash --login -c "pip install ..."

Reading the manual on bash startup files helps understand what is sourced when.

I think the Vim documentation should've explained the meaning behind the naming of these commands. Just telling you what they do doesn't help you remember the names.

map is the "root" of all recursive mapping commands. The root form applies to "normal", "visual+select", and "operator-pending" modes. (I'm using the term "root" as in linguistics.)

noremap is the "root" of all non-recursive mapping commands. The root form applies to the same modes as map. (Think of the nore prefix to mean "non-recursive".)

(Note that there are also the ! modes like map! that apply to insert & command-line.)

See below for what "recursive" means in this context.

Prepending a mode letter like n modify the modes the mapping works in. It can choose a subset of the list of applicable modes (e.g. only "visual"), or choose other modes that map wouldn't apply to (e.g. "insert").

Use help map-modes will show you a few tables that explain how to control which modes the mapping applies to.

Mode letters:

• n: normal only
• v: visual and select
• o: operator-pending
• x: visual only
• s: select only
• i: insert
• c: command-line
• l: insert, command-line, regexp-search (and others. Collectively called "Lang-Arg" pseudo-mode)

"Recursive" means that the mapping is expanded to a result, then the result is expanded to another result, and so on.

The expansion stops when one of these is true:

1. the result is no longer mapped to anything else.
2. a non-recursive mapping has been applied (i.e. the "noremap" [or one of its ilk] is the final expansion).

At that point, Vim's default "meaning" of the final result is applied/executed.

"Non-recursive" means the mapping is only expanded once, and that result is applied/executed.

Example:

 nmap K H
 nnoremap H G
 nnoremap G gg

The above causes K to expand to H, then H to expand to G and stop. It stops because of the nnoremap, which expands and stops immediately. The meaning of G will be executed (i.e. "jump to last line"). At most one non-recursive mapping will ever be applied in an expansion chain (it would be the last expansion to happen).

The mapping of G to gg only applies if you press G, but not if you press K. This mapping doesn't affect pressing K regardless of whether G was mapped recursively or not, since it's line 2 that causes the expansion of K to stop, so line 3 wouldn't be used.

The tweak:

position:fixed; 

works, but it breaks certain options....for example a scrollable menu that is tagged with a fixed position will not expand with the browser window anymore...wish there was another way to pin something on top/always visible

In this example, the line do_something_else() will not be executed if do_not_continue is True. Control will return, instead, to whichever function called some_function.

def some_function():
    if do_not_continue:
        return  # implicitly, this is the same as saying `return None` 
    do_something_else()

The standard associative-container erase idiom:

for (auto it = m.cbegin(); it != m.cend() /* not hoisted */; /* no increment */)
{
  if (must_delete)
  {
    m.erase(it++);    // or "it = m.erase(it)" since C++11
  }
  else
  {
    ++it;
  }
}

Note that we really want an ordinary for loop here, since we are modifying the container itself. The range-based loop should be strictly reserved for situations where we only care about the elements. The syntax for the RBFL makes this clear by not even exposing the container inside the loop body.

Edit. Pre-C++11, you could not erase const-iterators. There you would have to say:

for (std::map<K,V>::iterator it = m.begin(); it != m.end(); ) { /* ... */ }

Erasing an element from a container is not at odds with constness of the element. By analogy, it has always been perfectly legitimate to delete p where p is a pointer-to-constant. Constness does not constrain lifetime; const values in C++ can still stop existing.

For all the issue related to KeyBoard just use IQKeyBoardManager it's helpful. https://github.com/hackiftekhar/IQKeyboardManager.

The ternary operator is a syntactic and readability convenience, not a performance shortcut. People are split on the merits of it for conditionals of varying complexity, but for short conditions, it can be useful to have a one-line expression.

Moreover, since it's an expression, as Charlie Martin wrote, that means it can appear on the right-hand side of a statement in C. This is valuable for being concise.

The only working solution in my case was adding the following block to pom.xml:

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.8.0</version> <configuration> <release>12</release>
        </configuration>
        </plugin>
    </plugins>
</build>

You can simply manipulate the style of the div in question...

document.getElementById('target').style.display = 'none';

I have implemented below workaround to resolve this issue.

1. I have set the ORACLE_HOME using command prompt (right click cmd.exe and Run as System administrator).

2. Used below command

   set oracle_home="path to the oracle home"

3. Go to All programs --> Oracle -ora home1 --> Configuration migration tools --> Net Manager --> Listener

4. Select Database Services from dropdown. Both Global database name and SID are set to the same (ORCL in my case). Set Oracle Home Directory.

Oracle Net Manager window example from oracle documentation:

5. Click on File and save network configuration.

Well you can really shoot yourself in the foot with operator overloading. It's like with pointers people make stupid mistakes with them and so it was decided to take the scissors away.

At least I think that's the reason. I'm on your side anyway. :)

Per the comments to the original post, merges / joins are well-suited for this problem. In particular, an inner join will return only values that are present in both dataframes, making thesetdiff statement unnecessary.

Using the data from Dinre's example:

In base R:

cleanedA <- merge(data_A, data_B[, "index"], by = 1, sort = FALSE)
cleanedB <- merge(data_B, data_A[, "index"], by = 1, sort = FALSE)

Using the dplyr package:

library(dplyr)
cleanedA <- inner_join(data_A, data_B %>% select(index))
cleanedB <- inner_join(data_B, data_A %>% select(index))

To keep the data as two separate tables, each containing only its own variables, this subsets the unwanted table to only its index variable before joining. Then no new variables are added to the resulting table.

I have found some of the other answers to be overly complicated when all you really need is this

app.directive('autoFocus', function($timeout) {
    return {
        restrict: 'AC',
        link: function(_scope, _element) {
            $timeout(function(){
                _element[0].focus();
            }, 0);
        }
    };
});

usage is

<input name="theInput" auto-focus>

We use the timeout to let things in the dom render, even though it is zero, it at least waits for that - that way this works in modals and whatnot too

Sometimes

REPLACE(myString, CHAR(13) + CHAR(10), ' ')

won't work. In that case use the following snippet code:

REPLACE(REPLACE(myString, CHAR(13),''), CHAR(10), ' ')

I used this code,

 <div style="visibility:hidden">
    <audio autoplay loop>
        <source src="Aakaasam-Yemaaya Chesave.mp3">
    </audio> 
</div>

It is working well but i want stop and pause button. So, we can stop if we don't want to listen.

Nothing fancy? Try MessageBox

http://www.homeandlearn.co.uk/csharp/csharp_s1p9.html

When learning a new language, there are some nice problem sets you can use to learn the language better.

• Project Euler has some nice problems with a strong mathematical twist.
• Practice on Google Code Jam past problems, stick to the qualification rounds for the easier problems

string[] lines = File.ReadAllLines(txtProxyListPath.Text);
List<string> list_lines = new List<string>(lines);
Parallel.ForEach(list_lines, line =>
{
    //Your stuff
});

It only works till 4000 byte, What if the clob is bigger than 4000 bytes then we use this

declare
v_clob_size clob;

begin

      v_clob_size:= (DBMS_LOB.getlength(v_clob)) / 1024 / 1024;
      DBMS_OUTPUT.put_line('CLOB Size   ' || v_clob_size);   
end;

or

select (DBMS_LOB.getlength(your_column_name))/1024/1024 from your_table

If you interested in showing the Latitude and Longitude from the current direction , you can use this :

Directions are always given from the users current location.

The following query will help you perform that . You can pass the destination latitude and longitude here:

google.navigation:q=latitude,longitude

Use above as:

Uri gmmIntentUri = Uri.parse("google.navigation:q=latitude,longitude");
Intent mapIntent = new Intent(Intent.ACTION_VIEW, gmmIntentUri);
mapIntent.setPackage("com.google.android.apps.maps");
startActivity(mapIntent);

Or if you want to show via location , use:

google.navigation:q=a+street+address

More Info here: Google Maps Intents for Android

In my case I had loaded the same *.js file on the page twice in a <script> tag, so both files were attaching event handlers to the element. I removed the duplicate declaration and that fixed the problem.

mysqli_error()

As in:

$sql = "Your SQL statement here";
$result = mysqli_query($conn, $sql) or trigger_error("Query Failed! SQL: $sql - Error: ".mysqli_error($conn), E_USER_ERROR);

Trigger error is better than die because you can use it for development AND production, it's the permanent solution.

Hmm, not sure I agree with Nick re tag being similar to a branch. A tag is just a marker

• Trunk would be the main body of development, originating from the start of the project until the present.

• Branch will be a copy of code derived from a certain point in the trunk that is used for applying major changes to the code while preserving the integrity of the code in the trunk. If the major changes work according to plan, they are usually merged back into the trunk.

• Tag will be a point in time on the trunk or a branch that you wish to preserve. The two main reasons for preservation would be that either this is a major release of the software, whether alpha, beta, RC or RTM, or this is the most stable point of the software before major revisions on the trunk were applied.

In open source projects, major branches that are not accepted into the trunk by the project stakeholders can become the bases for forks -- e.g., totally separate projects that share a common origin with other source code.

The branch and tag subtrees are distinguished from the trunk in the following ways:

Subversion allows sysadmins to create hook scripts which are triggered for execution when certain events occur; for instance, committing a change to the repository. It is very common for a typical Subversion repository implementation to treat any path containing "/tag/" to be write-protected after creation; the net result is that tags, once created, are immutable (at least to "ordinary" users). This is done via the hook scripts, which enforce the immutability by preventing further changes if tag is a parent node of the changed object.

Subversion also has added features, since version 1.5, relating to "branch merge tracking" so that changes committed to a branch can be merged back into the trunk with support for incremental, "smart" merging.

In angular using material design sidenav I had to use the following:

let ele = document.getElementsByClassName('md-sidenav-content');
    let eleArray = <Element[]>Array.prototype.slice.call(ele);
    eleArray.map( val => {
        val.scrollTop = val.scrollHeight;
    });

public ActionResult Index()
{
    byte[] contents = FetchPdfBytes();
    return File(contents, "application/pdf", "test.pdf");
}

and for opening the PDF inside the browser you will need to set the Content-Disposition header:

public ActionResult Index()
{
    byte[] contents = FetchPdfBytes();
    Response.AddHeader("Content-Disposition", "inline; filename=test.pdf");
    return File(contents, "application/pdf");
}

It depends on the nature of your site.

I happen to work on a bit of software where IP tracking is important, and within a field consumed by parter sites I'd guess some 20% - 40% of requests are either detectably spoofed IPs or headers blanked out, depending on the time of day and where they came from. For a site which gets organic traffic (i.e. not through partners) I'd expect a much higher ratio of good IPs.

As Kosi said, be careful what you're doing with this - IPs are in no way a reliable way to identify unique visitors.

This is yet another way of cloning the model instance:

d = Foo.objects.filter(pk=1).values().first()   
d.update({'id': None})
duplicate = Foo.objects.create(**d)

find <path> -xdev -type f -name *.txt -exec ls -l {} \;

This will list the files and give details about attributes.

HTML:
 <div id="container"></div>   
JS:


$('#search').click(function() {
    $.ajax({
        type: 'POST',
        url: 'cityResults.htm',
        data: $('#cityDetails').serialize(),
        dataType:"json", //to parse string into JSON object,
        success: function(data){ 

                var len = data.length;
                var txt = "";
                if(len > 0){
                    for(var i=0;i<len;i++){

                            txt = "<tr><td>"+data[i].city+"</td><td>"+data[i].cStatus+"</td></tr>";
                            $("#container").append(txt);
                    }



        },
        error: function(jqXHR, textStatus, errorThrown){
            alert('error: ' + textStatus + ': ' + errorThrown);
        }
    });
    return false;
});

As suggested by @Brandan, here's what I needed to do to get around

error: Your local changes to the following files would be overwritten by merge:
       file.txt
Please, commit your changes or stash them before you can merge.
Aborting

Follow this process:

git status  # local changes to `file`
git stash list  # further changes to `file` we want to merge
git commit -m "WIP" file
git stash pop
git commit -m "WIP2" file
git rebase -i HEAD^^  # I always use interactive rebase -- I'm sure you could do this in a single command with the simplicity of this process -- basically squash HEAD into HEAD^
# mark the second commit to squash into the first using your EDITOR
git reset HEAD^

And you'll be left with fully merged local changes to file, ready to do further work/cleanup or make a single good commit. Or, if you know the merged contents of file will be correct, you could write a fitting message and skip git reset HEAD^.

ldapConnection is the server adres: ldap.example.com Ldap.Connection.Path is the path inside the ADS that you like to use insert in LDAP format.

OU=Your_OU,OU=other_ou,dc=example,dc=com

You start at the deepest OU working back to the root of the AD, then add dc=X for every domain section until you have everything including the top level domain

Now i miss a parameter to authenticate, this works the same as the path for the username

CN=username,OU=users,DC=example,DC=com

Introduction to LDAP

None of the solutions listed above worked for me. I then decided to look at the actual function and realised that when “$scope.watch ” was fired, it was putting a value in the name field which was not meant to be the case. So in the code I set and oldValue and newValue then

$scope.$watch('model.value', function(newValue, oldValue) {
if (newValue !== oldValue) {
validateValue(newValue);
}
});

Essentially when scope.watch is fired in this case, AngularJS monitors the changes to the name variable (model.value)

Change . to / as the path separator and use getResourceAsStream:

reader = new BufferedReader(new InputStreamReader(
    getClass().getClassLoader().getResourceAsStream(
        "com/company/app/dao/sql/SqlQueryFile.sql")));

or

reader = new BufferedReader(new InputStreamReader(
    getClass().getResourceAsStream(
        "/com/company/app/dao/sql/SqlQueryFile.sql")));

Note the leading slash when using Class.getResourceAsStream() vs ClassLoader.getResourceAsStream. getSystemResourceAsStream uses the system classloader which isn't what you want.

I suspect that using slashes instead of dots would work for ClassPathResource too.

Defining ‘Midnight’

The word “midnight” is tricky to define.

Some think of it as the moment before a new day starts. Trying to represent that in software as tricky as the last moment of the day can always be subdivided as a smaller fraction of a second.

I suggest a better way of thinking about this is to get “first moment of the day”.

This supports the commonly used approach of defining a span of time as ‘Half-Open’, where the beginning is inclusive while the ending is exclusive. So a full day starts with the first moment of the day and runs up to, but not including, the first moment of the following day. A full day would like this (notice the date going from the 3rd to the 4th):

2016-02-03T00:00:00.0-08:00[America/Los_Angeles]/2016-02-04T00:00:00.0-08:00[America/Los_Angeles]

Joda-Time

If using the Joda-Time library, call withTimeAtStartOfDay.

Note how we specify the time zone. If omitted, the JVM’s current default time zone is implicitly applied. Better to be explicit.

DateTime todayStart = DateTime.now( DateTimeZone.forID( "America/Montreal" ) ).withTimeAtStartOfDay() ;

If using Java 8 or later, better to use the java.time package built into Java. See sibling Answer by Jens Hoffman.

Try using qx{command} rather than backticks. To me, it's a bit better because: you can do SQL with it and not worry about escaping quotes and such. Depending on the editor and screen, my old eyes tend to miss the tiny back ticks, and it shouldn't ever have an issue with being overloaded like using angle brackets versus glob.

In my opinion, it's better to use the method of startActivity() just in the your code of the Activity.class. If you use that in the Adapter or other class, it will result in that.

FLCL's idea is very correct, I show you in a code:

    public class O1<T> where T: class
    {
        public Guid Id { get; }
        public O1(Guid id)
        {
            Id = id;
        }
        public bool IsNull => !GlobalHolder.Holder.ContainsKey(Id);
        public T Val => GlobalHolder.Holder.ContainsKey(Id) ? (T)GlobalHolder.Holder[Id] : null;
    }
    public class GlobalHolder
    {
        public static readonly Dictionary<Guid, object> Holder = new Dictionary<Guid, object>();
        public static O1<T> Instantiate<T>() where T: class, new()
        {
            var a = new T();
            var nguid = Guid.NewGuid();
            var b = new O1<T>(nguid);
            Holder[nguid] = a;
            return b;
        }
        public static void Destroy<T>(O1<T> obj) where T: class
        {
            Holder.Remove(obj.Id);
        }
    }

    public class Animal
    {

    }

    public class AnimalTest
    {
        public static void Test()
        {
            var tom = GlobalHolder.Instantiate<Animal>();
            var duplicateTomReference = tom;
            GlobalHolder.Destroy(tom);
            Console.WriteLine($"{duplicateTomReference.IsNull}");
            // prints true
        }
    }

Note: In this code sample, my naming convention comes from Unity.

std::atomic exists because many ISAs have direct hardware support for it

What the C++ standard says about std::atomic has been analyzed in other answers.

So now let's see what std::atomic compiles to to get a different kind of insight.

The main takeaway from this experiment is that modern CPUs have direct support for atomic integer operations, for example the LOCK prefix in x86, and std::atomic basically exists as a portable interface to those intructions: What does the "lock" instruction mean in x86 assembly? In aarch64, LDADD would be used.

This support allows for faster alternatives to more general methods such as std::mutex, which can make more complex multi-instruction sections atomic, at the cost of being slower than std::atomic because std::mutex it makes futex system calls in Linux, which is way slower than the userland instructions emitted by std::atomic, see also: Does std::mutex create a fence?

Let's consider the following multi-threaded program which increments a global variable across multiple threads, with different synchronization mechanisms depending on which preprocessor define is used.

main.cpp

#include <atomic>
#include <iostream>
#include <thread>
#include <vector>

size_t niters;

#if STD_ATOMIC
std::atomic_ulong global(0);
#else
uint64_t global = 0;
#endif

void threadMain() {
    for (size_t i = 0; i < niters; ++i) {
#if LOCK
        __asm__ __volatile__ (
            "lock incq %0;"
            : "+m" (global),
              "+g" (i) // to prevent loop unrolling
            :
            :
        );
#else
        __asm__ __volatile__ (
            ""
            : "+g" (i) // to prevent he loop from being optimized to a single add
            : "g" (global)
            :
        );
        global++;
#endif
    }
}

int main(int argc, char **argv) {
    size_t nthreads;
    if (argc > 1) {
        nthreads = std::stoull(argv[1], NULL, 0);
    } else {
        nthreads = 2;
    }
    if (argc > 2) {
        niters = std::stoull(argv[2], NULL, 0);
    } else {
        niters = 10;
    }
    std::vector<std::thread> threads(nthreads);
    for (size_t i = 0; i < nthreads; ++i)
        threads[i] = std::thread(threadMain);
    for (size_t i = 0; i < nthreads; ++i)
        threads[i].join();
    uint64_t expect = nthreads * niters;
    std::cout << "expect " << expect << std::endl;
    std::cout << "global " << global << std::endl;
}

GitHub upstream.

Compile, run and disassemble:

comon="-ggdb3 -O3 -std=c++11 -Wall -Wextra -pedantic main.cpp -pthread"
g++ -o main_fail.out                    $common
g++ -o main_std_atomic.out -DSTD_ATOMIC $common
g++ -o main_lock.out       -DLOCK       $common

./main_fail.out       4 100000
./main_std_atomic.out 4 100000
./main_lock.out       4 100000

gdb -batch -ex "disassemble threadMain" main_fail.out
gdb -batch -ex "disassemble threadMain" main_std_atomic.out
gdb -batch -ex "disassemble threadMain" main_lock.out

Extremely likely "wrong" race condition output for main_fail.out:

expect 400000
global 100000

and deterministic "right" output of the others:

expect 400000
global 400000

Disassembly of main_fail.out:

   0x0000000000002780 <+0>:     endbr64 
   0x0000000000002784 <+4>:     mov    0x29b5(%rip),%rcx        # 0x5140 <niters>
   0x000000000000278b <+11>:    test   %rcx,%rcx
   0x000000000000278e <+14>:    je     0x27b4 <threadMain()+52>
   0x0000000000002790 <+16>:    mov    0x29a1(%rip),%rdx        # 0x5138 <global>
   0x0000000000002797 <+23>:    xor    %eax,%eax
   0x0000000000002799 <+25>:    nopl   0x0(%rax)
   0x00000000000027a0 <+32>:    add    $0x1,%rax
   0x00000000000027a4 <+36>:    add    $0x1,%rdx
   0x00000000000027a8 <+40>:    cmp    %rcx,%rax
   0x00000000000027ab <+43>:    jb     0x27a0 <threadMain()+32>
   0x00000000000027ad <+45>:    mov    %rdx,0x2984(%rip)        # 0x5138 <global>
   0x00000000000027b4 <+52>:    retq

Disassembly of main_std_atomic.out:

   0x0000000000002780 <+0>:     endbr64 
   0x0000000000002784 <+4>:     cmpq   $0x0,0x29b4(%rip)        # 0x5140 <niters>
   0x000000000000278c <+12>:    je     0x27a6 <threadMain()+38>
   0x000000000000278e <+14>:    xor    %eax,%eax
   0x0000000000002790 <+16>:    lock addq $0x1,0x299f(%rip)        # 0x5138 <global>
   0x0000000000002799 <+25>:    add    $0x1,%rax
   0x000000000000279d <+29>:    cmp    %rax,0x299c(%rip)        # 0x5140 <niters>
   0x00000000000027a4 <+36>:    ja     0x2790 <threadMain()+16>
   0x00000000000027a6 <+38>:    retq   

Disassembly of main_lock.out:

Dump of assembler code for function threadMain():
   0x0000000000002780 <+0>:     endbr64 
   0x0000000000002784 <+4>:     cmpq   $0x0,0x29b4(%rip)        # 0x5140 <niters>
   0x000000000000278c <+12>:    je     0x27a5 <threadMain()+37>
   0x000000000000278e <+14>:    xor    %eax,%eax
   0x0000000000002790 <+16>:    lock incq 0x29a0(%rip)        # 0x5138 <global>
   0x0000000000002798 <+24>:    add    $0x1,%rax
   0x000000000000279c <+28>:    cmp    %rax,0x299d(%rip)        # 0x5140 <niters>
   0x00000000000027a3 <+35>:    ja     0x2790 <threadMain()+16>
   0x00000000000027a5 <+37>:    retq

Conclusions:

• the non-atomic version saves the global to a register, and increments the register.

  Therefore, at the end, very likely four writes happen back to global with the same "wrong" value of 100000.

• std::atomic compiles to lock addq. The LOCK prefix makes the following inc fetch, modify and update memory atomically.

• our explicit inline assembly LOCK prefix compiles to almost the same thing as std::atomic, except that our inc is used instead of add. Not sure why GCC chose add, considering that our INC generated a decoding 1 byte smaller.

ARMv8 could use either LDAXR + STLXR or LDADD in newer CPUs: How do I start threads in plain C?

Tested in Ubuntu 19.10 AMD64, GCC 9.2.1, Lenovo ThinkPad P51.

I make this method and work fine. (tested in android 6.0.1)

public void notifyThis(String title, String message) {
    NotificationCompat.Builder b = new NotificationCompat.Builder(this.context);
    b.setAutoCancel(true)
            .setDefaults(NotificationCompat.DEFAULT_ALL)
            .setWhen(System.currentTimeMillis())
            .setSmallIcon(R.drawable.favicon32)
            .setTicker("{your tiny message}")
            .setContentTitle(title)
            .setContentText(message)
            .setContentInfo("INFO");

    NotificationManager nm = (NotificationManager) this.context.getSystemService(Context.NOTIFICATION_SERVICE);
    nm.notify(1, b.build());
}

Since my account is new I can't up-vote Nino van Hooff's answer. If your strings are coming from a Windows based source such as an aspx based server, this solution does work:

rawText.replaceAll("(\\\\r\\\\n|\\\\n)", "<br />");

Seems to be a weird character set issue as the double back-slashes are being interpreted as single slash escape characters. Hence the need for the quadruple slashes above.

Again, under most circumstances "(\\r\\n|\\n)" should work, but if your strings are coming from a Windows based source try the above.

Just an FYI tried everything to correct the issue I was having replacing those line endings. Thought at first was failed conversion from Windows-1252 to UTF-8. But that didn't working either. This solution is what finally did the trick. :)

Here's yet another, slightly different answer with a few enhancements.

This code takes the .jar right out of the .aar. Personally, that gives me a bit more confidence that the bits being shipped via .jar are the same as the ones shipped via .aar. This also means that if you're using ProGuard, the output jar will be obfuscated as desired.

I also added a super "makeJar" task, that makes jars for all build variants.

task(makeJar) << {
    // Empty. We'll add dependencies for this task below
}

// Generate jar creation tasks for all build variants
android.libraryVariants.all { variant ->
    String taskName = "makeJar${variant.name.capitalize()}"

    // Create a jar by extracting it from the assembled .aar
    // This ensures that products distributed via .aar and .jar exactly the same bits
    task (taskName, type: Copy) {
        String archiveName = "${project.name}-${variant.name}"
        String outputDir = "${buildDir.getPath()}/outputs"

        dependsOn "assemble${variant.name.capitalize()}"
        from(zipTree("${outputDir}/aar/${archiveName}.aar"))
        into("${outputDir}/jar/")
        include('classes.jar')
        rename ('classes.jar', "${archiveName}-${variant.mergedFlavor.versionName}.jar")
    }

    makeJar.dependsOn tasks[taskName]
}

For the curious reader, I struggled to determine the correct variables and parameters that the com.android.library plugin uses to name .aar files. I finally found them in the Android Open Source Project here.

The values can be retrieved during the parsing:

var yahoo = [], j = `[{"name":"Lenovo Thinkpad 41A4298","website":"google"},_x000D_
{"name":"Lenovo Thinkpad 41A2222","website":"google"},_x000D_
{"name":"Lenovo Thinkpad 41Awww33","website":"yahoo"},_x000D_
{"name":"Lenovo Thinkpad 41A424448","website":"google"},_x000D_
{"name":"Lenovo Thinkpad 41A429rr8","website":"ebay"},_x000D_
{"name":"Lenovo Thinkpad 41A429ff8","website":"ebay"},_x000D_
{"name":"Lenovo Thinkpad 41A429ss8","website":"rediff"},_x000D_
{"name":"Lenovo Thinkpad 41A429sg8","website":"yahoo"}]`_x000D_
_x000D_
var data = JSON.parse(j, function(key, value) { _x000D_
      if ( value.website === "yahoo" ) yahoo.push(value); _x000D_
      return value; })_x000D_
_x000D_
console.log( yahoo )

The alpha can be set along with the color using the following hex format #ARGB or #AARRGGBB. See http://developer.android.com/guide/topics/resources/color-list-resource.html

Use Radium!

The following is an example from their website:

var Radium = require('radium');_x000D_
var React = require('react');_x000D_
var color = require('color');_x000D_
_x000D_
@Radium_x000D_
class Button extends React.Component {_x000D_
  static propTypes = {_x000D_
    kind: React.PropTypes.oneOf(['primary', 'warning']).isRequired_x000D_
  };_x000D_
_x000D_
  render() {_x000D_
    // Radium extends the style attribute to accept an array. It will merge_x000D_
    // the styles in order. We use this feature here to apply the primary_x000D_
    // or warning styles depending on the value of the `kind` prop. Since its_x000D_
    // all just JavaScript, you can use whatever logic you want to decide which_x000D_
    // styles are applied (props, state, context, etc)._x000D_
    return (_x000D_
      <button_x000D_
        style={[_x000D_
          styles.base,_x000D_
          styles[this.props.kind]_x000D_
        ]}>_x000D_
        {this.props.children}_x000D_
      </button>_x000D_
    );_x000D_
  }_x000D_
}_x000D_
_x000D_
// You can create your style objects dynamically or share them for_x000D_
// every instance of the component._x000D_
var styles = {_x000D_
  base: {_x000D_
    color: '#fff',_x000D_
_x000D_
    // Adding interactive state couldn't be easier! Add a special key to your_x000D_
    // style object (:hover, :focus, :active, or @media) with the additional rules._x000D_
    ':hover': {_x000D_
      background: color('#0074d9').lighten(0.2).hexString()_x000D_
    }_x000D_
  },_x000D_
_x000D_
  primary: {_x000D_
    background: '#0074D9'_x000D_
  },_x000D_
_x000D_
  warning: {_x000D_
    background: '#FF4136'_x000D_
  }_x000D_
};

You could write an extension method with linq.

public static bool MyContains(this string str, params string[] p) {
 return !p.Cast<string>().Where(s => !str.Contains(s)).Any();
}

EDIT (thx to sirid):

public static bool MyContains(this string str, params string[] p) {
 return !p.Any(s => !str.Contains(s));
}

On windows if you have a 5 button mouse, you can use forward and back in lieu of ALT+Left and ALT+Right.

Use pivot tables, it will definitely save you time. If you are using excel 2007+ use tables (structured references) to keep your table dynamic. However if you insist on using functions, go with Smandoli's suggestion. Again, if you are on 2007+ use SUMIFS, it's faster compared to SUMIF.

You can use // instead of single /. That converts to int directly.

This has been covered here quite well, but if you REALLY need even better performance than anything listed here, you can use this approach that uses strtok.

$Names_Keys = [];
$Name = strtok(file_get_contents($file), "\n");
while ($Name !== false) {
    $Names_Keys[$Name] = 0;
    $Name = strtok("\n");
}

Note, this assumes your file is saved with \n as the newline character (you can update that as need be), and it also stores the words/names/lines as the array keys instead of the values, so that you can use it as a lookup table, allowing the use of isset (much, much faster), instead of in_array.

I think this will do the trick:

SELECT REGEXP_REPLACE(COLUMN, '[^[:print:]]', '')

The existing answers solve most cases. However, I ran into a case where I needed the content of the grid-cell to be overflow: visible. I solved it by absolutely positioning within a wrapper (not ideal, but the best I know), like this:

.month-grid {
  display: grid;
  grid-template: repeat(6, 1fr) / repeat(7, 1fr);
  background: #fff;
  grid-gap: 2px;  
}

.day-item-wrapper {
  position: relative;
}

.day-item {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px;

  background: rgba(0,0,0,0.1);
}

https://codepen.io/bjnsn/pen/vYYVPZv

enter image description here

You can set Execution time-out in seconds.

This issue come when I am using PHP as server side language and the work around was to generate base64 enconding of my image before sending the result to client

$path = 'E:/pat/rwanda.png';
$type = pathinfo($path, PATHINFO_EXTENSION);
$data = file_get_contents($path);
$base64 = 'data:image/' . $type . ';base64,' . base64_encode($data);

I think may give someone idea to create his own work around

Thanks

Let us first try to understand the root cause as to why it is happening in first place.

Why do I get an error or Uncaught TypeError: Cannot set property 'innerHTML' of null?

The browser always loads the entire HTML DOM from top to bottom. Any JavaScript code written inside the script tags (present in head section of your HTML file) gets executed by the browser rendering engine even before your whole DOM (various HTML element tags present within body tag) is loaded. The scripts present in head tag are trying to access an element having id hello even before it has actually been rendered in the DOM. So obviously, JavaScript failed to see the element and hence you end up seeing the null reference error.

How can you make it work as before?

You want to show the "hi" message on the page as soon as the user lands on your page for the first time. So you need to hook up your code at a point when you are completely sure of the fact that DOM is fully loaded and the hello id element is accessible/available. It is achievable in two ways:

1. Reorder your scripts: This way your scripts get fired only after the DOM containing your hello id element is already loaded. You can achieve it by simply moving the script tag after all the DOM elements i.e. at the bottom where body tag is ending. Since rendering happens from top to bottom so your scripts get executed in the end and you face no error.

    <!DOCTYPE HTML>_x000D_
    <html>_x000D_
    <head>_x000D_
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">_x000D_
    <title>Untitled Document</title>_x000D_
    </head>_x000D_
    _x000D_
    <body>_x000D_
    <div id="hello"></div>_x000D_
    _x000D_
    <script type ="text/javascript">_x000D_
        what();_x000D_
        function what(){_x000D_
            document.getElementById('hello').innerHTML = 'hi';_x000D_
        };_x000D_
    </script>_x000D_
    </body>_x000D_
    </html>

2. Use event hooking: Browser's rendering engine provides an event based hook through window.onload event which gives you the hint that browser has finished loading the DOM. So by the time when this event gets fired, you can be rest assured that your element with hello id already loaded in the DOM and any JavaScript fired thereafter which tries to access this element will not fail. So you do something like below code snippet. Please note that in this case, your script works even though it is present at the top of your HTML document inside the head tag.

<!DOCTYPE HTML>_x000D_
        <html>_x000D_
        <head>_x000D_
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">_x000D_
        <title>Untitled Document</title>_x000D_
        <script type ="text/javascript">_x000D_
            window.onload = function() {_x000D_
            what();_x000D_
            function what(){_x000D_
                document.getElementById('hello').innerHTML = 'hi';_x000D_
            };_x000D_
        }_x000D_
        </script>_x000D_
        </head>_x000D_
        _x000D_
        <body>_x000D_
        <div id="hello"></div>_x000D_
        </body>_x000D_
        </html>

Try this solution. I have used databinding for binding view. You can use common "findViewById()" function.

public class ActCPExpense extends BaseActivity implements View.OnClickListener,  {
private static final String TAG = ActCPExpense.class.getSimpleName();
private Context mContext;
private ActCpLossBinding mBinding;

private ViewPagerAdapter adapter;



@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    try {
        setContentView(R.layout.act_cp_loss);
        mBinding = DataBindingUtil.setContentView(this, R.layout.act_cp_loss);
        mContext = ActCPExpense.this;
        initViewsAct();


    } catch (Exception e) {
        LogUtils.LOGE(TAG, e);
    }

}


private void initViewsAct() {

    adapter = new ViewPagerAdapter(getSupportFragmentManager());
    adapter.addFragment(FragmentCPPayee.newInstance(), "Title");
    mBinding.viewpager.setAdapter(adapter);
    mBinding.tab.setViewPager(mBinding.viewpager);



}



@Override
public boolean onOptionsItemSelected(MenuItem itemActUtility) {
    int i = itemActUtility.getItemId();
    if (i == android.R.id.home) {
        onBackPressed();

    } 

    return super.onOptionsItemSelected(itemActUtility);
}

@Override
public void onClick(View view) {
    super.onClick(view);
    int id = view.getId();
    if (id == R.id.btnAdd) {
        addFragment();

    } else if (id == R.id.btnDelete) {
        removeFragment();

    }


}
    private void addFragment(){
    adapter.addFragment(FragmentCPPayee.newInstance("Title");
    adapter.notifyDataSetChanged();
    mBinding.tab.setViewPager(mBinding.viewpager);
}
private void removeFragment(){
    adapter.removeItem(mBinding.viewpager.getCurrentItem());
    mBinding.tab.setViewPager(mBinding.viewpager);
}


class ViewPagerAdapter extends FragmentStatePagerAdapter {
    private final List<Fragment> mFragmentList = new ArrayList<>();
    private final List<String> mFragmentTitleList = new ArrayList<>();


    public ViewPagerAdapter(FragmentManager manager) {
        super(manager);
    }

    @Override
    public int getItemPosition(@NonNull Object object) {
        return PagerAdapter.POSITION_NONE;
    }


    @Override
    public Fragment getItem(int position) {
        return mFragmentList.get(position);
    }

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


    public void addFragment(Fragment fragment, String title) {
        mFragmentList.add(fragment);
        mFragmentTitleList.add(title);

    }

    public void removeItem(int pos) {

        destroyItem(null, pos, mFragmentList.get(pos));
        mFragmentList.remove(pos);
        mFragmentTitleList.remove(pos);
        adapter.notifyDataSetChanged();
        mBinding.viewpager.setCurrentItem(pos - 1, false);
    }

    @Override
    public CharSequence getPageTitle(int position) {
        return "Title " + String.valueOf(position + 1);
    }
}


}

For Xamarin iOS

btnObj.SendActionForControlEvents(UIControlEvent.TouchUpInside);

Reference

In swift you can create an enum to detect the credit card type.

enum CreditCardType: Int { // Enum which encapsulates different card types and method to find the type of card.

case Visa
case Master
case Amex
case Discover

func validationRegex() -> String {
    var regex = ""
    switch self {
    case .Visa:
        regex = "^4[0-9]{6,}$"

    case .Master:
        regex = "^5[1-5][0-9]{5,}$"

    case .Amex:
        regex = "^3[47][0-9]{13}$"

    case .Discover:
        regex = "^6(?:011|5[0-9]{2})[0-9]{12}$"
    }

    return regex
}

func validate(cardNumber: String) -> Bool {
    let predicate = NSPredicate(format: "SELF MATCHES %@", validationRegex())
    return predicate.evaluateWithObject(cardNumber)
}

// Method returns the credit card type for given card number
static func cardTypeForCreditCardNumber(cardNumber: String) -> CreditCardType?  {
    var creditCardType: CreditCardType?

    var index = 0
    while let cardType = CreditCardType(rawValue: index) {
        if cardType.validate(cardNumber) {
            creditCardType = cardType
            break
        } else {
            index++
        }
    }
    return creditCardType
  }
}

Call the method CreditCardType.cardTypeForCreditCardNumber("#card number") which returns CreditCardType enum value.

There's are multiple ways to split a string :

1. If you want to make it temporary then split like this:

_

import net package

host, port, err := net.SplitHostPort("0.0.0.1:8080")
if err != nil {
fmt.Println("Error is splitting : "+err.error());
//do you code here
}
fmt.Println(host, port)

2. Split based on struct :

   • Create a struct and split like this

_

type ServerDetail struct {
    Host       string
    Port       string
    err        error
}

ServerDetail = net.SplitHostPort("0.0.0.1:8080") //Specific for Host and Port

Now use in you code like ServerDetail.Host and ServerDetail.Port

If you don't want to split specific string do it like this:

type ServerDetail struct {
    Host       string
    Port       string
}

ServerDetail = strings.Split([Your_String], ":") // Common split method

and use like ServerDetail.Host and ServerDetail.Port.

That's All.

When you say you are Forking a repository you are basically creating a copy of the repository under your GitHub ID. The main point to note here is that any changes made to the original repository will be reflected back to your forked repositories(you need to fetch and rebase). However, if you make any changes to your forked repository you will have to explicitly create a pull request to the original repository. If your pull request is approved by the administrator of the original repository, then your changes will be committed/merged with the existing original code-base. Until then, your changes will be reflected only in the copy you forked.

In short:

The Fork & Pull Model lets anyone fork an existing repository and push changes to their personal fork without requiring access be granted to the source repository. The changes must then be pulled into the source repository by the project maintainer.

Note that after forking you can clone your repository (the one under your name) locally on your machine. Make changes in it and push it to your forked repository. However, to reflect your changes in the original repository your pull request must be approved.

Couple of other interesting dicussions -

Are git forks actually git clones?

How do I update a GitHub forked repository?

There are multiple methods of creating date as discussed above. I would not repeat same stuff. Here is small method to convert String to Date in Java Script if that is what you are looking for,

function compareDate(str1){
// str1 format should be dd/mm/yyyy. Separator can be anything e.g. / or -. It wont effect
var dt1   = parseInt(str1.substring(0,2));
var mon1  = parseInt(str1.substring(3,5));
var yr1   = parseInt(str1.substring(6,10));
var date1 = new Date(yr1, mon1-1, dt1);
return date1;
}

The server first tries to authenticate you by public key. That doesn't work (I guess you haven't set one up), so it then falls back to 'keyboard-interactive'. It should then ask you for a password, which presumably you're not getting right. Did you see a password prompt?

If you have the options -H and -n available (man grep is your friend):

$ cat file
foo
bar
foobar

$ grep -H foo file
file:foo
file:foobar

$ grep -Hn foo file
file:1:foo
file:3:foobar

Options:

-H, --with-filename

Print the file name for each match. This is the default when there is more than one file to search.

-n, --line-number

Prefix each line of output with the 1-based line number within its input file. (-n is specified by POSIX.)

-H is a GNU extension, but -n is specified by POSIX

The "@import" rule could calls in multiple styles files. These files are called by the browser or User Agent when needed e.g. HTML tags call the CSS.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="EN" dir="ltr">
<head>
<title>Using @import</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<style type="text/css">
@import url("main.css");
</style>
</head>
<body>
</body>
</html>

CSS File "main.css" Contains The Following Syntax:

@import url("fineprint.css") print;
@import url("bluish.css") projection, tv;
@import 'custom.css';
@import url("chrome://communicator/skin/");
@import "common.css" screen, projection;
@import url('landscape.css') screen and (orientation:landscape);

To insert in style element use createTexNode don't use innerHTML but:

<script>
var style = document.createElement('style');
style.setAttribute("type", "text/css");
var textNode = document.createTextNode("
    @import 'fineprint.css' print;
    @import 'bluish.css' projection, tv;
    @import 'custom.css';
    @import 'chrome://communicator/skin/';
    @import 'common.css' screen, projection;
    @import 'landscape.css' screen and (orientation:landscape);
");
style.appendChild(textNode);
</script>

I see no one mentioned the diamond problem, which might arise with inheritance.

In a glance, if classes B and C inherit A and both override method X, and a fourth class D, inherits from both B and C, and does not override X, which implementation of X D is supposed to use?

Wikipedia offers a nice overview of the topic being discussed in this question.

The + operator returns the numeric representation of the object. So in your particular case, it would appear to be predicating the if on whether or not d is a non-zero number.

Reference here. And, as pointed out in comments, here.

If you really can't get a unique index on the table, you could try...

INSERT INTO table_listnames (name, address, tele)
    SELECT 'Rupert', 'Somewhere', '022'
        FROM some_other_table
        WHERE NOT EXISTS (SELECT name
                              FROM table_listnames
                              WHERE name='Rupert')
        LIMIT 1;

for (int i = 0; i < list.size(); i++) {
        if (i < list.size() - 1) {
            if (list.get(i) > list.get(i + 1)) {
                int j = list.get(i);
                list.remove(i);
                list.add(i, list.get(i));
                list.remove(i + 1);
                list.add(j);
                i = -1;
            }
        }
    }

There are several issues with each of the available methods, but I believe that defining an after_initialize callback is the way to go for the following reasons:

1. default_scope will initialize values for new models, but then that will become the scope on which you find the model. If you just want to initialize some numbers to 0 then this is not what you want.
2. Defining defaults in your migration also works part of the time... As has already been mentioned this will not work when you just call Model.new.
3. Overriding initialize can work, but don't forget to call super!
4. Using a plugin like phusion's is getting a bit ridiculous. This is ruby, do we really need a plugin just to initialize some default values?
5. Overriding after_initialize is deprecated as of Rails 3. When I override after_initialize in rails 3.0.3 I get the following warning in the console:

DEPRECATION WARNING: Base#after_initialize has been deprecated, please use Base.after_initialize :method instead. (called from /Users/me/myapp/app/models/my_model:15)

Therefore I'd say write an after_initialize callback, which lets you default attributes in addition to letting you set defaults on associations like so:

  class Person < ActiveRecord::Base
    has_one :address
    after_initialize :init

    def init
      self.number  ||= 0.0           #will set the default value only if it's nil
      self.address ||= build_address #let's you set a default association
    end
  end    

Now you have just one place to look for initialization of your models. I'm using this method until someone comes up with a better one.

Caveats:

1. For boolean fields do:

   self.bool_field = true if self.bool_field.nil?

   See Paul Russell's comment on this answer for more details

2. If you're only selecting a subset of columns for a model (ie; using select in a query like Person.select(:firstname, :lastname).all) you will get a MissingAttributeError if your init method accesses a column that hasn't been included in the select clause. You can guard against this case like so:

   self.number ||= 0.0 if self.has_attribute? :number

   and for a boolean column...

   self.bool_field = true if (self.has_attribute? :bool_value) && self.bool_field.nil?

   Also note that the syntax is different prior to Rails 3.2 (see Cliff Darling's comment below)

expr $str : '.*\(.\)'

Or

echo ${str: -1}

In Java 8, you can use streams:

int[] spam = new int[] { 1, 2, 3 };
Arrays.stream(spam)
      .boxed()
      .collect(Collectors.toList());

Just run it without options.

P:\>cl.exe
Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8168 for 80x86
Copyright (C) Microsoft Corp 1984-1998. All rights reserved.

usage: cl [ option... ] filename... [ /link linkoption... ]

I'd rather use the expression "serialization" than "casting into bytes". Serializing an object means converting it into a byte array (or XML, or something else) that can be used on the remote box to re-construct the object. In .NET, the Serializable attribute marks types whose objects can be serialized.

Assuming you have your development and distribution certificate installed correctly:

Under Project your main code signing identity should be the developer profile for that app.

Under Targets your main code signing identity should be the distribution profile for that app, except that you should change Debug > Any iOS SDK to your Development profile... and make sure Release > Any iOS SDK is your Distribution profile. This should build and run on your provisioned phone and should archive without any codesign warnings.

Only thing that worked for me when my phone crashed and I had to restore it from a previous iTunes image.

Using reshape package:

#data
x <- read.table(textConnection(
"Code Country        1950    1951    1952    1953    1954
AFG  Afghanistan    20,249  21,352  22,532  23,557  24,555
ALB  Albania        8,097   8,986   10,058  11,123  12,246"), header=TRUE)

library(reshape)

x2 <- melt(x, id = c("Code", "Country"), variable_name = "Year")
x2[,"Year"] <- as.numeric(gsub("X", "" , x2[,"Year"]))

Alternatively you could update brew by installing it again. (Think I did this as El Capitan changed something)

Note: this is a heavy handed approach that will remove all applications installed via brew!

Try to install brew a fresh and it will tell how to uninstall.

At original time of writing to uninstall:

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/uninstall)"

Edit: As of 2020 to uninstall:

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/uninstall.sh)"

To set fixed 2 digits after the decimal point use these first:

cout.setf(ios::fixed);
cout.setf(ios::showpoint);
cout.precision(2);

Then print your double values.

This is an example:

#include <iostream>
using std::cout;
using std::ios;
using std::endl;

int main(int argc, char *argv[]) {
    cout.setf(ios::fixed);
    cout.setf(ios::showpoint);
    cout.precision(2);
    double d = 10.90;
    cout << d << endl;
    return 0;
}

Generally, using Promise.all() runs requests "async" in parallel. Using await can run in parallel OR be "sync" blocking.

test1 and test2 functions below show how await can run async or sync.

test3 shows Promise.all() that is async.

jsfiddle with timed results - open browser console to see test results

Sync behavior. Does NOT run in parallel, takes ~1800ms:

const test1 = async () => {
  const delay1 = await Promise.delay(600); //runs 1st
  const delay2 = await Promise.delay(600); //waits 600 for delay1 to run
  const delay3 = await Promise.delay(600); //waits 600 more for delay2 to run
};

Async behavior. Runs in paralel, takes ~600ms:

const test2 = async () => {
  const delay1 = Promise.delay(600);
  const delay2 = Promise.delay(600);
  const delay3 = Promise.delay(600);
  const data1 = await delay1;
  const data2 = await delay2;
  const data3 = await delay3; //runs all delays simultaneously
}

Async behavior. Runs in parallel, takes ~600ms:

const test3 = async () => {
  await Promise.all([
  Promise.delay(600), 
  Promise.delay(600), 
  Promise.delay(600)]); //runs all delays simultaneously
};

TLDR; If you are using Promise.all() it will also "fast-fail" - stop running at the time of the first failure of any of the included functions.

You have by default the static endpoint for static files. Also Flask application has the following arguments:

static_url_path: can be used to specify a different path for the static files on the web. Defaults to the name of the static_folder folder.

static_folder: the folder with static files that should be served at static_url_path. Defaults to the 'static' folder in the root path of the application.

It means that the filename argument will take a relative path to your file in static_folder and convert it to a relative path combined with static_url_default:

url_for('static', filename='path/to/file')

will convert the file path from static_folder/path/to/file to the url path static_url_default/path/to/file.

So if you want to get files from the static/bootstrap folder you use this code:

<link rel="stylesheet" type="text/css" href="{{ url_for('static', filename='bootstrap/bootstrap.min.css') }}">

Which will be converted to (using default settings):

<link rel="stylesheet" type="text/css" href="static/bootstrap/bootstrap.min.css">

Also look at url_for documentation.

You have to explicitly define the constructor in B and explicitly call the constructor for the parent.

B(int x) : A(x) { }

or

B() : A(5) { }

Just pressing F5 is not always working.

why?

Because your ISP is also caching web data for you.

Solution: Force Refresh.

Force refresh your browser by pressing CTRL + F5 in Firefox or Chrome to clear ISP cache too, instead of just pressing F5

You then can see 200 response instead of 304 in the browser F12 developer tools network tab.

Another trick is to add question mark ? at the end of the URL string of the requested page:

http://localhost:52199/Customers/Create?

The question mark will ensure that the browser refresh the request without caching any previous requests.

Additionally in Visual Studio you can set the default browser to Chrome in Incognito mode to avoid cache issues while developing, by adding Chrome in Incognito mode as default browser, see the steps (self illustrated):

Apart from what it's written in other answers, other details related to path of cookie, maximum age of cookie, whether it's secured or not also passed in Set-Cookie response header. For instance:

Set-Cookie:name=value[; expires=date][; domain=domain][; path=path][; secure]

However, not all of these details are passed back to the server by the client when making next HTTP request.

You can also set HttpOnly flag at the end of your cookie, to indicate that your cookie is httponly and must not allowed to be accessed, in scripts by javascript code. This helps to prevent attacks such as session-hijacking.

For more information, see RFC 2109. Also have a look at Nicholas C. Zakas's article, HTTP cookies explained.

For makefile projects, the accepted solution fails, due to a bug in Visual Studio (which is present at least up until version 2012 - I haven't yet tested 2013). This bug is detailed here.

In order to have the console pause after program termination on a makefile project, perform these steps (this may differ for versions other than 2010 - 2012):

1) Pass /SUBSYSTEM:CONSOLE to the linker. - EDIT: see below.

2) Open your project file (.vcxproj) in a text editor.

3) Inside the root <project> tag, insert the following:

<ItemDefinitionGroup>
  <Link>
    <SubSystem>Console</SubSystem>
  </Link>
</ItemDefinitionGroup>

4) Reload the project in your solution.

5) Run the program without debugging (CTRL + F5).

EDIT:

As per my comment below, setting the linker option /SUBSYSTEM:CONSOLE is actually irrelevant for makefile projects (and not necessarily even possible, if you are using a compiler other than MSVC). All that matters is that the setting is added to the .vcxproj file, as per step 3 above.

Actually as answered before starting with API Level 18 you can cancel Notifications posted by other apps differet than your own using NotificationListenerService but that approach will no longer work on Lollipop, here is the way to remove notifications covering also Lillipop API.

if (Build.VERSION.SDK_INT < 21) {
    cancelNotification(sbn.getPackageName(), sbn.getTag(), sbn.getId());
}
else {
    cancelNotification(sbn.getKey());
}

Try

padding : 10px 10px 10px 10px;

As hippietrail suggests, meder's answer can break surrogate pairs and misinterpret “characters.” For example:

// DO NOT USE THIS!
const a = ''.split('');
console.log(a);

I suggest using one of the following ES2015 features to correctly handle these character sequences.

Spread syntax (already answered by insertusernamehere)

const a = [...''];
console.log(a);

Array.from

const a = Array.from('');
console.log(a);

RegExp u flag

const a = ''.split(/(?=[\s\S])/u);
console.log(a);

Use /(?=[\s\S])/u instead of /(?=.)/u because . does not match newlines. If you are still in ES5.1 era (or if your browser doesn't handle this regex correctly - like Edge), you can use the following alternative (transpiled by Babel). Note, that Babel tries to also handle unmatched surrogates correctly. However, this doesn't seem to work for unmatched low surrogates.

const a = ''.split(/(?=(?:[\0-\uD7FF\uE000-\uFFFF]|[\uD800-\uDBFF][\uDC00-\uDFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF]))/);
console.log(a);

Reduce method (already answered by Mark Amery)

const s = '';
const a = [];
for (const s2 of s) {
   a.push(s2);
}
console.log(a);

Please make it an immutable type! The value of a fraction doesn't change - a half doesn't become a third, for example. Instead of setDenominator, you could have withDenominator which returns a new fraction which has the same numerator but the specified denominator.

Life is much easier with immutable types.

Overriding equals and hashcode would be sensible too, so it can be used in maps and sets. Outlaw Programmer's points about arithmetic operators and string formatting are good too.

As a general guide, have a look at BigInteger and BigDecimal. They're not doing the same thing, but they're similar enough to give you good ideas.

Since the reduce method has been removed from the built in function from Python3, don't forget to import the functools in your code. Please look at the code snippet below.

import functools
my_list = [10,15,20,25,35]
sum_numbers = functools.reduce(lambda x ,y : x+y , my_list)
print(sum_numbers)

The only way to remove an inline "display:none" via jQuery's css-api is by resetting it with the empty string (null does NOT work btw!!).

According to the jQuery docu this is the general way to "remove" a once set inline style property.

$("#mydiv").css("display","");

or

$("#mydiv").css({display:""});

should do the trick properly.

IMHO there is a method missing in jQuery that could be called "unhide" or "reveal" which instead of just setting another inline style property unsets the display value properly as described above. Or maybe hide() should store the initial inline value and show() should restore that...

OR you can use pandas:

>>> import pandas as pd
>>> L = [(1,2),(2,3),(4,5),(3,4),(6,7),(6,7),(3,8)]
>>> df=pd.DataFrame(L)
>>> df[1]
0    2
1    3
2    5
3    4
4    7
5    7
6    8
Name: 1, dtype: int64
>>> df[1].tolist()
[2, 3, 5, 4, 7, 7, 8]
>>> 

Or numpy:

>>> import numpy as np
>>> L = [(1,2),(2,3),(4,5),(3,4),(6,7),(6,7),(3,8)]
>>> arr=np.array(L)
>>> arr.T[1]
array([2, 3, 5, 4, 7, 7, 8])
>>> arr.T[1].tolist()
[2, 3, 5, 4, 7, 7, 8]
>>> 

From Eugene Tskhovrebov

List<MyClass> myObjects = Arrays.asList(mapper.readValue(json, MyClass[].class))

This solution seems to be the best for me.

sudo xcode-select -s /Applications/Xcode 10.app/Contents/Developer

languoguangs-iMac:/ languoguang$ sudo xcode-select -s /Applications/Xcode 10.app/Contents/Developer
xcode-select: error: invalid argument '10.app/Contents/Developer'
Usage: xcode-select [options]

Print or change the path to the active developer directory. This directory
controls which tools are used for the Xcode command line tools (for example, 
xcodebuild) as well as the BSD development commands (such as cc and make).

Options:
  -h, --help                  print this help message and exit
  -p, --print-path            print the path of the active developer directory
  -s <path>, --switch <path>  set the path for the active developer directory
  --install                   open a dialog for installation of the command line developer tools
  -v, --version               print the xcode-select version
  -r, --reset                 reset to the default command line tools path
languoguangs-iMac:/ languoguang$ sudo xcode-select -s "/Applications/Xcode 10.app/Contents/Developer"

because my Xcode name in Application is "Xcode 10",

sudo xcode-select -s "/Applications/Xcode 10.app/Contents/Developer"

works.

This is an extremely old question, but here are the approaches I personally use ...

Get Standard/Base URL

As many have already stated, this works for most situations.

var url = window.location.origin;

Get Absolute Base URL

However, this simple approach can be used to strip off any port numbers.

var url = "http://" + location.host.split(":")[0];

Edit: To address the concern, posed by Jason Rice, the following can be used to automatically insert the correct protocol type ...

var url = window.location.protocol + "//" + location.host.split(":")[0];

Set Base URL

As a bonus -- the base URL can then be redefined globally.

document.head.innerHTML = document.head.innerHTML + "<base href='" + url + "' />";

I think I am too late but maybe this solution helpful for others. For using custom font place your font file in your font directory.

textView.setTypeface(ResourcesCompat.getFont(this, R.font.lato));

showhide.html

<!DOCTYPE html>
<html>
    <head>
      <script type="text/javascript">
        function showHide(switchTextDiv, showHideDiv)
        {
          var std = document.getElementById(switchTextDiv);
          var shd = document.getElementById(showHideDiv);
          if (shd.style.display == "block")
          {
            shd.style.display = "none";
            std.innerHTML = "<span style=\"display: block; background-color: yellow\">Show</span>"; 
          }
          else
          {
            if (shd.innerHTML.length <= 0)
            {
              shd.innerHTML = "<object width=\"100%\" height=\"100%\" type=\"text/html\" data=\"showhide_embedded.html\"></object>";
            }
            shd.style.display = "block";
            std.innerHTML = "<span style=\"display: block; background-color: yellow\">Hide</span>";
          }
        }
      </script>
    </head>
    <body>
      <a id="switchTextDiv1" href="javascript:showHide('switchTextDiv1', 'showHideDiv1')">
        <span style="display: block; background-color: yellow">Show</span>
      </a>
      <div id="showHideDiv1" style="display: none; width: 100%; height: 300px"></div>
    </body>
</html>

showhide_embedded.html

<!DOCTYPE html>
<html>
    <head>
      <script type="text/javascript"> 
        function load()
        {
          var ts = document.getElementById("theString");
          ts.scrollIntoView(true);
        }
      </script>
    </head>
    <body onload="load()">
      <pre>
        some text 1
        some text 2
        some text 3
        some text 4
        some text 5
        <span id="theString" style="background-color: yellow">some text 6 highlight</span>
        some text 7
        some text 8
        some text 9
      </pre>
    </body>
</html>

String if the size is fixed and small and text if it is variable and big. This is kind of important because text is way bigger than strings. It contains a lot more kilobytes.

So for small fields always use string(varchar). Fields like. first_name, login, email, subject (of a article or post) and example of texts: content/body of a post or article. fields for paragraphs etc

String size 1 to 255 (default = 255)

Text size 1 to 4294967296 (default = 65536)2

What you're asking about is called Variable Variables. All you need to do is store your string in a variable and access it like so:

$Class = 'MyCustomClass';
$Property = 'Name';
$List = array('Name');

$Object = new $Class();

// All of these will echo the same property
echo $Object->$Property;  // Evaluates to $Object->Name
echo $Object->{$List[0]}; // Use if your variable is in an array

Use indexOf

imageList.indexOf(200)

What is a patch?

A patch is little more (see below) than a series of instructions: "add this here", "remove that there", "change this third thing to a fourth". That's why git tells you:

The copy of the patch that failed is found in:
c:/.../project2/.git/rebase-apply/patch

You can open that patch in your favorite viewer or editor, open the files-to-be-changed in your favorite editor, and "hand apply" the patch, using what you know (and git does not) to figure out how "add this here" is to be done when the files-to-be-changed now look little or nothing like what they did when they were changed earlier, with those changes delivered to you as a patch.

A little more

A three-way merge introduces that "little more" information than the plain "series of instructions": it tells you what the original version of the file was as well. If your repository has the original version, your git can compare what you did to a file, to what the patch says to do to the file.

As you saw above, if you request the three-way merge, git can't find the "original version" in the other repository, so it can't even attempt the three-way merge. As a result you get no conflict markers, and you must do the patch-application by hand.

Using --reject

When you have to apply the patch by hand, it's still possible that git can apply most of the patch for you automatically and leave only a few pieces to the entity with the ability to reason about the code (or whatever it is that needs patching). Adding --reject tells git to do that, and leave the "inapplicable" parts of the patch in rejection files. If you use this option, you must still hand-apply each failing patch, and figure out what to do with the rejected portions.

Once you have made the required changes, you can git add the modified files and use git am --continue to tell git to commit the changes and move on to the next patch.

What if there's nothing to do?

Since we don't have your code, I can't tell if this is the case, but sometimes, you wind up with one of the patches saying things that amount to, e.g., "fix the spelling of a word on line 42" when the spelling there was already fixed.

In this particular case, you, having looked at the patch and the current code, should say to yourself: "aha, this patch should just be skipped entirely!" That's when you use the other advice git already printed:

If you prefer to skip this patch, run "git am --skip" instead.

If you run git am --skip, git will skip over that patch, so that if there were five patches in the mailbox, it will end up adding just four commits, instead of five (or three instead of five if you skip twice, and so on).

In short, decoupling success callback function from the ajax function so later you can add your own handlers without modifying the original code (observer pattern).

Please find more detailed information from here: https://stackoverflow.com/a/14754681/1049184

If you are using Google fonts I would suggest the following.

If you want the fonts to run from your localhost or server you need to download the files.

Instead of downloading the ttf packages in the download links, use the live link they provide, for example:

http://fonts.googleapis.com/css?family=Source+Sans+Pro:300,400,600,300italic,400italic,600italic

Paste the URL in your browser and you should get a font-face declaration similar to the first answer.

Open the URLs provided, download and rename the files.

Stick the updated font-face declarations with relative paths to the woff files in your CSS, and you are done.

Try a \<Space> before 12, like so:

:set guifont=Monospace\ 12

Multi-value when and no-value case:

print "Enter your grade: "
grade = gets.chomp
case grade
when "A", "B"
  puts 'You pretty smart!'
when "C", "D"
  puts 'You pretty dumb!!'
else
  puts "You can't even use a computer!"
end

And a regular expression solution here:

print "Enter a string: "
some_string = gets.chomp
case
when some_string.match(/\d/)
  puts 'String has numbers'
when some_string.match(/[a-zA-Z]/)
  puts 'String has letters'
else
  puts 'String has no numbers or letters'
end

A linear search looks down a list, one item at a time, without jumping. In complexity terms this is an O(n) search - the time taken to search the list gets bigger at the same rate as the list does.

A binary search is when you start with the middle of a sorted list, and see whether that's greater than or less than the value you're looking for, which determines whether the value is in the first or second half of the list. Jump to the half way through the sublist, and compare again etc. This is pretty much how humans typically look up a word in a dictionary (although we use better heuristics, obviously - if you're looking for "cat" you don't start off at "M"). In complexity terms this is an O(log n) search - the number of search operations grows more slowly than the list does, because you're halving the "search space" with each operation.

As an example, suppose you were looking for U in an A-Z list of letters (index 0-25; we're looking for the value at index 20).

A linear search would ask:

list[0] == 'U'? No.
list[1] == 'U'? No.
list[2] == 'U'? No.
list[3] == 'U'? No.
list[4] == 'U'? No.
list[5] == 'U'? No.
... list[20] == 'U'? Yes. Finished.

The binary search would ask:

Compare list[12] ('M') with 'U': Smaller, look further on. (Range=13-25)
Compare list[19] ('T') with 'U': Smaller, look further on. (Range=20-25)
Compare list[22] ('W') with 'U': Bigger, look earlier. (Range=20-21)
Compare list[20] ('U') with 'U': Found it! Finished.

Comparing the two:

• Binary search requires the input data to be sorted; linear search doesn't
• Binary search requires an ordering comparison; linear search only requires equality comparisons
• Binary search has complexity O(log n); linear search has complexity O(n) as discussed earlier
• Binary search requires random access to the data; linear search only requires sequential access (this can be very important - it means a linear search can stream data of arbitrary size)

I solved a similar problem by listing bound IP addresses in a cmd window running as admin:

netsh http show iplisten

Then, one by one, blowing them all away:

netsh http delete iplisten ipaddress=127.0.0.200
netsh http delete iplisten ipaddress=127.0.0.2
...

If you look at the alternatives on this page, of course the first option looks better and the second one is just more verbose. But if you are looking through a large class that someone else wrote, that verbosity can make the difference between realizing right away what the conditional is testing or not.

One of the reasons I moved away from Perl is because it relies so heavily on punctuation, which is much slower to interpret while reading.

I know I'm outvoted here, but I will almost always side with more explicit code so others can read it more accurately. Then again, I would never use a boolean variable called "status" either. Maybe isSuccess or just success, but "status" being true or false does not mean anything to the casual reader intuitively. As you can tell, I'm very into code readability because I read so much code others have written.

Ids are meant to be unique, and never use an id that starts with a number, use data-attributes instead to set the target like so :

<div id="searchbycharacter">
    <a class="searchbychar" href="#" data-target="numeric">0-9 |</a> 
    <a class="searchbychar" href="#" data-target="A"> A |</a> 
    <a class="searchbychar" href="#" data-target="B"> B |</a> 
    <a class="searchbychar" href="#" data-target="C"> C |</a> 
    ... Untill Z
</div>

As for the jquery :

$(document).on('click','.searchbychar', function(event) {
    event.preventDefault();
    var target = "#" + this.getAttribute('data-target');
    $('html, body').animate({
        scrollTop: $(target).offset().top
    }, 2000);
});

Bigtable

A Distributed Storage System for Structured Data

Bigtable is a distributed storage system (built by Google) for managing structured data that is designed to scale to a very large size: petabytes of data across thousands of commodity servers.

Many projects at Google store data in Bigtable, including web indexing, Google Earth, and Google Finance. These applications place very different demands on Bigtable, both in terms of data size (from URLs to web pages to satellite imagery) and latency requirements (from backend bulk processing to real-time data serving).

Despite these varied demands, Bigtable has successfully provided a flexible, high-performance solution for all of these Google products.

Some features

• fast and extremely large-scale DBMS
• a sparse, distributed multi-dimensional sorted map, sharing characteristics of both row-oriented and column-oriented databases.
• designed to scale into the petabyte range
• it works across hundreds or thousands of machines
• it is easy to add more machines to the system and automatically start taking advantage of those resources without any reconfiguration
• each table has multiple dimensions (one of which is a field for time, allowing versioning)
• tables are optimized for GFS (Google File System) by being split into multiple tablets - segments of the table as split along a row chosen such that the tablet will be ~200 megabytes in size.

Architecture

BigTable is not a relational database. It does not support joins nor does it support rich SQL-like queries. Each table is a multidimensional sparse map. Tables consist of rows and columns, and each cell has a time stamp. There can be multiple versions of a cell with different time stamps. The time stamp allows for operations such as "select 'n' versions of this Web page" or "delete cells that are older than a specific date/time."

In order to manage the huge tables, Bigtable splits tables at row boundaries and saves them as tablets. A tablet is around 200 MB, and each machine saves about 100 tablets. This setup allows tablets from a single table to be spread among many servers. It also allows for fine-grained load balancing. If one table is receiving many queries, it can shed other tablets or move the busy table to another machine that is not so busy. Also, if a machine goes down, a tablet may be spread across many other servers so that the performance impact on any given machine is minimal.

Tables are stored as immutable SSTables and a tail of logs (one log per machine). When a machine runs out of system memory, it compresses some tablets using Google proprietary compression techniques (BMDiff and Zippy). Minor compactions involve only a few tablets, while major compactions involve the whole table system and recover hard-disk space.

The locations of Bigtable tablets are stored in cells. The lookup of any particular tablet is handled by a three-tiered system. The clients get a point to a META0 table, of which there is only one. The META0 table keeps track of many META1 tablets that contain the locations of the tablets being looked up. Both META0 and META1 make heavy use of pre-fetching and caching to minimize bottlenecks in the system.

Implementation

BigTable is built on Google File System (GFS), which is used as a backing store for log and data files. GFS provides reliable storage for SSTables, a Google-proprietary file format used to persist table data.

Another service that BigTable makes heavy use of is Chubby, a highly-available, reliable distributed lock service. Chubby allows clients to take a lock, possibly associating it with some metadata, which it can renew by sending keep alive messages back to Chubby. The locks are stored in a filesystem-like hierarchical naming structure.

There are three primary server types of interest in the Bigtable system:

1. Master servers: assign tablets to tablet servers, keeps track of where tablets are located and redistributes tasks as needed.
2. Tablet servers: handle read/write requests for tablets and split tablets when they exceed size limits (usually 100MB - 200MB). If a tablet server fails, then a 100 tablet servers each pickup 1 new tablet and the system recovers.
3. Lock servers: instances of the Chubby distributed lock service. Lots of actions within BigTable require acquisition of locks including opening tablets for writing, ensuring that there is no more than one active Master at a time, and access control checking.

Example from Google's research paper:

A slice of an example table that stores Web pages. The row name is a reversed URL. The contents column family contains the page contents, and the anchor column family contains the text of any anchors that reference the page. CNN's home page is referenced by both the Sports Illustrated and the MY-look home pages, so the row contains columns named anchor:cnnsi.com and anchor:my.look.ca. Each anchor cell has one version; the contents column has three versions, at timestamps t3, t5, and t6.

API

Typical operations to BigTable are creation and deletion of tables and column families, writing data and deleting columns from a row. BigTable provides this functions to application developers in an API. Transactions are supported at the row level, but not across several row keys.

Here is the link to the PDF of the research paper.

And here you can find a video showing Google's Jeff Dean in a lecture at the University of Washington, discussing the Bigtable content storage system used in Google's backend.

There are lots of way we can do that and simply you can try following.

ls /home/user/new | tr '\n' '\n' | grep .txt

Another method:

cd /home/user/new && ls *.txt

You need to use reflection to get the method to start with, then "construct" it by supplying type arguments with MakeGenericMethod:

MethodInfo method = typeof(Sample).GetMethod(nameof(Sample.GenericMethod));
MethodInfo generic = method.MakeGenericMethod(myType);
generic.Invoke(this, null);

For a static method, pass null as the first argument to Invoke. That's nothing to do with generic methods - it's just normal reflection.

As noted, a lot of this is simpler as of C# 4 using dynamic - if you can use type inference, of course. It doesn't help in cases where type inference isn't available, such as the exact example in the question.

The first thing you need to study is the java.util.Set API.

Here's a small example of how to use its methods:

    Set<Integer> numbers = new TreeSet<Integer>();

    numbers.add(2);
    numbers.add(5);

    System.out.println(numbers); // "[2, 5]"
    System.out.println(numbers.contains(7)); // "false"

    System.out.println(numbers.add(5)); // "false"
    System.out.println(numbers.size()); // "2"

    int sum = 0;
    for (int n : numbers) {
        sum += n;
    }
    System.out.println("Sum = " + sum); // "Sum = 7"

    numbers.addAll(Arrays.asList(1,2,3,4,5));
    System.out.println(numbers); // "[1, 2, 3, 4, 5]"

    numbers.removeAll(Arrays.asList(4,5,6,7));
    System.out.println(numbers); // "[1, 2, 3]"

    numbers.retainAll(Arrays.asList(2,3,4,5));
    System.out.println(numbers); // "[2, 3]"

Once you're familiar with the API, you can use it to contain more interesting objects. If you haven't familiarized yourself with the equals and hashCode contract, already, now is a good time to start.

In a nutshell:

• @Override both or none; never just one. (very important, because it must satisfied property: a.equals(b) == true --> a.hashCode() == b.hashCode()
  • Be careful with writing boolean equals(Thing other) instead; this is not a proper @Override.
• For non-null references x, y, z, equals must be:
  • reflexive: x.equals(x).
  • symmetric: x.equals(y) if and only if y.equals(x)
  • transitive: if x.equals(y) && y.equals(z), then x.equals(z)
  • consistent: x.equals(y) must not change unless the objects have mutated
  • x.equals(null) == false
• The general contract for hashCode is:
  • consistent: return the same number unless mutation happened
  • consistent with equals: if x.equals(y), then x.hashCode() == y.hashCode()
    • strictly speaking, object inequality does not require hash code inequality
    • but hash code inequality necessarily requires object inequality
• What counts as mutation should be consistent between equals and hashCode.

Next, you may want to impose an ordering of your objects. You can do this by making your type implements Comparable, or by providing a separate Comparator.

Having either makes it easy to sort your objects (Arrays.sort, Collections.sort(List)). It also allows you to use SortedSet, such as TreeSet.

Further readings on stackoverflow:

• Overriding equals and hashCode in Java
• When to use Comparable vs Comparator

If you are using Minikube, there is a magic command!

$ minikube tunnel

Hopefully someone can save a few minutes with this.

Reference link https://minikube.sigs.k8s.io/docs/handbook/accessing/#using-minikube-tunnel

Below given some information about fav Icon

What Is FavIcon? ? FavIcon is nothing but small image which appears top left along with the application address bar title.Standard size specification for favicon.ico is 16 by 16 pixel. Please see below attached figure.

How It Works ? ? Usually we add our FavIcon.ico image in the route solution folder and automatically application picks it while running. But most of the time we might have to use below both link reference.

               <link rel="icon" href="favicon.ico" type="image/ico"/>
               <link rel="shortcut icon" href="favicon.ico" type="image/x-icon"/>

Some browser expect one (rel="icon") Some other browser expect other rel="shortcut icon"

? Type=”image/x-icon” OR Type=”image/ico”: once expect exact ico image and one expect any image even formatted from .jpg or .pn ..etc.

? We have to use above two tags to the common pages like – Master page , Main frame which is getting used in all the pages

Take a look at the java.text.MessageFormat class, MessageFormat takes a set of objects, formats them, then inserts the formatted strings into the pattern at the appropriate places.

Object[] params = new Object[]{"hello", "!"};
String msg = MessageFormat.format("{0} world {1}", params);

Example for SignalR 2.2.1 (May 2017)

Server

Install-Package Microsoft.AspNet.SignalR.SelfHost -Version 2.2.1

[assembly: OwinStartup(typeof(Program.Startup))]
namespace ConsoleApplication116_SignalRServer
{
    class Program
    {
        static IDisposable SignalR;

        static void Main(string[] args)
        {
            string url = "http://127.0.0.1:8088";
            SignalR = WebApp.Start(url);

            Console.ReadKey();
        }

        public class Startup
        {
            public void Configuration(IAppBuilder app)
            {
                app.UseCors(CorsOptions.AllowAll);

                /*  CAMEL CASE & JSON DATE FORMATTING
                 use SignalRContractResolver from
                https://stackoverflow.com/questions/30005575/signalr-use-camel-case

                var settings = new JsonSerializerSettings()
                {
                    DateFormatHandling = DateFormatHandling.IsoDateFormat,
                    DateTimeZoneHandling = DateTimeZoneHandling.Utc
                };

                settings.ContractResolver = new SignalRContractResolver();
                var serializer = JsonSerializer.Create(settings);
                  
               GlobalHost.DependencyResolver.Register(typeof(JsonSerializer),  () => serializer);                
            
                 */

                app.MapSignalR();
            }
        }

        [HubName("MyHub")]
        public class MyHub : Hub
        {
            public void Send(string name, string message)
            {
                Clients.All.addMessage(name, message);
            }
        }
    }
}

Client

(almost the same as Mehrdad Bahrainy reply)

Install-Package Microsoft.AspNet.SignalR.Client -Version 2.2.1

namespace ConsoleApplication116_SignalRClient
{
    class Program
    {
        private static void Main(string[] args)
        {
            var connection = new HubConnection("http://127.0.0.1:8088/");
            var myHub = connection.CreateHubProxy("MyHub");

            Console.WriteLine("Enter your name");    
            string name = Console.ReadLine();

            connection.Start().ContinueWith(task => {
                if (task.IsFaulted)
                {
                    Console.WriteLine("There was an error opening the connection:{0}", task.Exception.GetBaseException());
                }
                else
                {
                    Console.WriteLine("Connected");

                    myHub.On<string, string>("addMessage", (s1, s2) => {
                        Console.WriteLine(s1 + ": " + s2);
                    });

                    while (true)
                    {
                        Console.WriteLine("Please Enter Message");
                        string message = Console.ReadLine();

                        if (string.IsNullOrEmpty(message))
                        {
                            break;
                        }

                        myHub.Invoke<string>("Send", name, message).ContinueWith(task1 => {
                            if (task1.IsFaulted)
                            {
                                Console.WriteLine("There was an error calling send: {0}", task1.Exception.GetBaseException());
                            }
                            else
                            {
                                Console.WriteLine(task1.Result);
                            }
                        });
                    }
                }

            }).Wait();

            Console.Read();
            connection.Stop();
        }
    }
}

DB_CLOSE_DELAY=-1

hbm2ddl closes the connection after creating the table, so h2 discards it.

If you have your connection-url configured like this

jdbc:h2:mem:test

the content of the database is lost at the moment the last connection is closed.

If you want to keep your content you have to configure the url like this

jdbc:h2:mem:test;DB_CLOSE_DELAY=-1

If doing so, h2 will keep its content as long as the vm lives.

Notice the semicolon (;) rather than colon (:).

See the In-Memory Databases section of the Features page. To quote:

By default, closing the last connection to a database closes the database. For an in-memory database, this means the content is lost. To keep the database open, add ;DB_CLOSE_DELAY=-1 to the database URL. To keep the content of an in-memory database as long as the virtual machine is alive, use jdbc:h2:mem:test;DB_CLOSE_DELAY=-1.

There are a couple of awkward things with your example class:

• it's called People while it has a price and info (more something for objects, not people);
• when naming a class as a plural of something, it suggests it is an abstraction of more than one thing.

Anyway, here's a demo of how to use a Comparator<T>:

public class ComparatorDemo {

    public static void main(String[] args) {
        List<Person> people = Arrays.asList(
                new Person("Joe", 24),
                new Person("Pete", 18),
                new Person("Chris", 21)
        );
        Collections.sort(people, new LexicographicComparator());
        System.out.println(people);
        Collections.sort(people, new AgeComparator());
        System.out.println(people);
    }
}

class LexicographicComparator implements Comparator<Person> {
    @Override
    public int compare(Person a, Person b) {
        return a.name.compareToIgnoreCase(b.name);
    }
}

class AgeComparator implements Comparator<Person> {
    @Override
    public int compare(Person a, Person b) {
        return a.age < b.age ? -1 : a.age == b.age ? 0 : 1;
    }
}

class Person {

    String name;
    int age;

    Person(String n, int a) {
        name = n;
        age = a;
    }

    @Override
    public String toString() {
        return String.format("{name=%s, age=%d}", name, age);
    }
}

EDIT

And an equivalent Java 8 demo would look like this:

public class ComparatorDemo {

    public static void main(String[] args) {
        List<Person> people = Arrays.asList(
                new Person("Joe", 24),
                new Person("Pete", 18),
                new Person("Chris", 21)
        );
        Collections.sort(people, (a, b) -> a.name.compareToIgnoreCase(b.name));
        System.out.println(people);
        Collections.sort(people, (a, b) -> a.age < b.age ? -1 : a.age == b.age ? 0 : 1);
        System.out.println(people);
    }
}

This may be achieved by using AppCompatCheckBox. You can use app:buttonCompat="@drawable/selector_drawable" to change the selector.

It's working with PNGs, but I didn't find a way for it to work with Vector Drawables.

import pygame
pygame.init()
pygame.display.set_mode()
while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit(); #sys.exit() if sys is imported
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_0:
                print("Hey, you pressed the key, '0'!")
            if event.key == pygame.K_1:
                print("Doing whatever")

In note that K_0 and K_1 aren't the only keys, to see all of them, see pygame documentation, otherwise, hit tab after typing in

pygame.

(note the . after pygame) into an idle program. Note that the K must be capital. Also note that if you don't give pygame a display size (pass no args), then it will auto-use the size of the computer screen/monitor. Happy coding!

For VSCode Terminal First open cmd and install angular-cli as global

npm install -g @angular/cli

Then update your Environment Variables following this step

1. win + s // this will open search box
2. Type Edit Environment Variables
3. Open Environment Variables
4. Add %AppData%\npm inside PATH
5. Click OK and close.

Now you can restart your VSCode and it will work as it will normally do.

That's because the response from chrome.runtime.sendMessage is asynchronous; here's the order of operations:

var newDeals = [];

// (1) first chrome.runtime.sendMessage is called, and *registers a callback*
// so that when the data comes back *in the future*
// the function will be called
chrome.runtime.sendMessage({...}, function(deals) {
  // (3) sometime in the future, this function runs,
  // but it's too late
  newDeals = deals;
});

// (2) this is called immediately, `newDeals` is an empty array
this.setState({ deals: newDeals });

When you pause the script with the debugger, you're giving the extension time to call the callback; by the time you continue, the data has arrived and it appears to work.

To fix, you want to do the setState call after the data comes back from the Chrome extension:

var newDeals = [];

// (1) first chrome.runtime.sendMessage is called, and *registers a callback*
// so that when the data comes back *in the future*
// the function will be called
chrome.runtime.sendMessage({...}, function(deals) {
  // (2) sometime in the future, this function runs
  newDeals = deals;

  // (3) now you can call `setState` with the data
  this.setState({ deals: newDeals });
}.bind(this)); // Don't forget to bind(this) (or use an arrow function)

[Edit]

If this doesn't work for you, check out the other answers on this question, which explain other reasons your component might not be updating.

You can use array slicing:

Entry.objects.all()[:1].get()

Which can be used with .filter():

Entry.objects.filter()[:1].get()

You wouldn't want to first turn it into a list because that would force a full database call of all the records. Just do the above and it will only pull the first. You could even use .order_by() to ensure you get the first you want.

Be sure to add the .get() or else you will get a QuerySet back and not an object.

You can't select a sheet in a non-active workbook.

You must first activate the workbook, then you can select the sheet.

workbooks("A").activate
workbooks("A").worksheets("B").select 

When you use Activate it automatically activates the workbook.

Note you can select >1 sheet in a workbook:

activeworkbook.sheets(array("sheet1","sheet3")).select

but only one sheet can be Active, and if you activate a sheet which is not part of a multi-sheet selection then those other sheets will become un-selected.

A ClusterIP exposes the following:

• spec.clusterIp:spec.ports[*].port

You can only access this service while inside the cluster. It is accessible from its spec.clusterIp port. If a spec.ports[*].targetPort is set it will route from the port to the targetPort. The CLUSTER-IP you get when calling kubectl get services is the IP assigned to this service within the cluster internally.

A NodePort exposes the following:

• <NodeIP>:spec.ports[*].nodePort
• spec.clusterIp:spec.ports[*].port

If you access this service on a nodePort from the node's external IP, it will route the request to spec.clusterIp:spec.ports[*].port, which will in turn route it to your spec.ports[*].targetPort, if set. This service can also be accessed in the same way as ClusterIP.

Your NodeIPs are the external IP addresses of the nodes. You cannot access your service from spec.clusterIp:spec.ports[*].nodePort.

A LoadBalancer exposes the following:

• spec.loadBalancerIp:spec.ports[*].port
• <NodeIP>:spec.ports[*].nodePort
• spec.clusterIp:spec.ports[*].port

You can access this service from your load balancer's IP address, which routes your request to a nodePort, which in turn routes the request to the clusterIP port. You can access this service as you would a NodePort or a ClusterIP service as well.

You can prevent race condition, if you use "Atomic" classes. The reason is just the thread don't separate operation get and set, example is below:

AtomicInteger ai = new AtomicInteger(2);
ai.getAndAdd(5);

As a result, you will have 7 in link "ai". Although you did two actions, but the both operation confirm the same thread and no one other thread will interfere to this, that means no race conditions!

The following creates a generic function, taking an array of any size and of any type by reference:

template<typename T, std::size_t S>
void my_func(T (&arr)[S]) {
   // do stuff
}

play with the code.

if you just want to set the style attribute use

$('.handle').attr('style','left: 300px');

Or you can use css method of jQuery to set only one css style property

$('.handle').css('left', '300px');

OR same as key value

$('.handle').css({'left': '300px', position});

More info on W3schools

The usual error is one tries to put Content-Type: {multipart/form-data} into the header of the post request. That will fail, it is best to let Postman do it for you. For example:

Suggestion To Load Via Postman

Fails If In Header

Works

Here's what I use in my code. It works like a charm!

In yourviewcontroller.h add:

@property (nonatomic) UITapGestureRecognizer *tapRecognizer;

Now in the .m file, add this to your ViewDidLoad function:

- (void)viewDidLoad {
    //Keyboard stuff
    tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(didTapAnywhere:)];
    tapRecognizer.cancelsTouchesInView = NO;
    [self.view addGestureRecognizer:tapRecognizer];
}

Also, add this function in the .m file:

- (void)handleSingleTap:(UITapGestureRecognizer *) sender
{
    [self.view endEditing:YES];
}

docker-compose exists to keep you having to write a ton of commands you would have to with docker-cli.

docker-compose also makes it easy to startup multiple containers at the same time and automatically connect them together with some form of networking.

The purpose of docker-compose is to function as docker cli but to issue multiple commands much more quickly.

To make use of docker-compose, you need to encode the commands you were running before into a docker-compose.yml file.

You are not just going to copy paste them into the yaml file, there is a special syntax.

Once created, you have to feed it to the docker-compose cli and it will be up to the cli to parse the file and create all the different containers with the correct configuration we specify.

So you will have separate containers, let's say, one is redis-server and the second one is node-app, and you want that created using the Dockerfile in your current directory.

Additionally, after making that container, you would map some port from the container to the local machine to access everything running inside of it.

So for your docker-compose.yml file, you would want to start the first line like so:

version: '3'

That tells Docker the version of docker-compose you want to use. After that, you have to add:

version: '3'
services: 
  redis-server: 
    image: 'redis'
  node-app:
    build: .

Please notice the indentation, very important. Also, notice for one service I am grabbing an image, but for another service I am telling docker-compose to look inside the current directory to build the image that will be used for the second container.

Then you want to specify all the different ports that you want open on this container.

version: '3'
services: 
  redis-server: 
    image: 'redis'
  node-app:
    build: .
    ports:
      -

Please notice the dash, a dash in a yaml file is how we specify an array. In this example, I am mapping 8081 on my local machine to 8081 on the container like so:

version: '3'
services: 
  redis-server: 
    image: 'redis'
  node-app:
    build: .
    ports:
      - "8081:8081"

So the first port is your local machine, and the other is the port on the container, you could also distinguish between the two to avoid confusion like so:

version: '3'
services:
  redis-server:
    image: 'redis'
  node-app:
    build: .
    ports:
      - "4001:8081"

By developing your docker-compose.yml file like this, it will create these containers on essentially the same network and they will have free access to communicate with each other any way they please and exchange as much information as they want.

When the two containers are created using docker-compose, we do not need any port declarations.

Now in my example, we need to do some code configuration in the Nodejs app that looks something like this:

const express = require('express');
const redis = require('redis');

const app = express();
const client = redis.createClient({
  host: 'redis-server'
});

I use this example above to make you aware that there may be some specific configuration you would have to do in addition to the docker-compose.yml file that may be specific to your project.

Now, if you ever find yourself working with a Nodejs app and redis, you want to ensure you are aware of the default port Nodejs uses, so I will add this:

const express = require('express');
const redis = require('redis');

const app = express();
const client = redis.createClient({
  host: 'redis-server',
  port: 6379
});

So Docker is going to see that the Node app is looking for redis-server and redirect that connection over to this running container.

The whole time, the Dockerfile only contains this:

FROM node:alpine

WORKDIR '/app'

COPY /package.json ./
RUN npm install
COPY . .

CMD ["npm", "start"]

So, whereas before you would have to run docker run myimage to create an instance of all the containers or services inside the file, you can instead run docker-compose up and you don't have to specify an image because Docker will look in the current working directory and look for a docker-compose.yml file inside.

Before docker-compose.yml, we had to deal with two separate commands of docker build . and docker run myimage, but in the docker-compose world, if you want to rebuild your images, you write docker-compose up --build. That tells Docker to start up the containers again but rebuild it to get the latest changes.

So docker-compose makes it easier for working with multiple containers. The next time you need to start this group of containers in the background, you can do docker-compose up -d; and to stop them, you can do docker-compose down.

XML is not a format for storing images, neither binary data. I think it all depends on how you want to use those images. If you are in a web application and would want to read them from there and display them, I would store the URLs. If you need to send them to another web endpoint, I would serialize them, rather than persisting manually in XML. Please explain what is the scenario.

This happens because the JSON format uses ""(Quotes) and anything in between these quotes is useful information (either key or the data).

Suppose your data was : He said "This is how it is done". Then the actual data should look like "He said \"This is how it is done\".".

This ensures that the \" is treated as "(Quotation mark) and not as JSON formatting. This is called escape character.

This usually happens when one tries to encode an already JSON encoded data, which is a common way I have seen this happen.

Try this

$arr = ['This is a sample','This is also a "sample"']; echo json_encode($arr);

OUTPUT:

["This is a sample","This is also a \"sample\""]

It just happend to me. I solved the problem by tracing backward from the point ng-click is coded. Found out that an extra

</div> 

was placed in the html to prematurely close the div block that contains the ng-click.

Removed the extra

</div> 

then everything is working fine.

values_of_objArray = [
  { id: 3432, name: "Recent" },
  { id: 3442, name: "Most Popular" },
  { id: 3352, name: "Rating" }
];

private ValueId : number = 0 // this will be used for multi access like 
                             // update, deleting the obj with id.
private selectedObj : any;

private selectedValueObj(id: any) {
  this.ValueId = (id.srcElement || id.target).value;
  for (let i = 0; i < this.values_of_objArray.length; i++) {
    if (this.values_of_objArray[i].id == this.ValueId) {
      this.selectedObj = this.values_of_objArray[i];
    }
  }
}

Now play with this.selectedObj which has the selected obj from the view.

HTML:

<select name="values_of_obj" class="form-control" [(ngModel)]="ValueId"  
        (change)="selectedValueObj($event)" required>

  <option *ngFor="let Value of values_of_objArray"
          [value]="Value.id">{{Value.name}}</option>    
</select>

in java when you set a value to variable, it return new value. So

private boolean getValue()
{
     return value = !value;
}

When creating a JQuery Dialog window, JQuery inserts a ui-widget-overlay class. If you bind a click function to that class to close the dialog, it should provide the functionality you are looking for.

Code will be something like this (untested):

$('.ui-widget-overlay').click(function() { $("#dialog").dialog("close"); });

Edit: The following has been tested for Kendo as well:

$('.k-overlay').click(function () {
            var popup = $("#dialogId").data("kendoWindow");
            if (popup)
                popup.close();
        });

If you are a developer, this is what you need to do:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />

./ refers to the current working directory, except in the require() function. When using require(), it translates ./ to the directory of the current file called. __dirname is always the directory of the current file.

For example, with the following file structure

/home/user/dir/files/config.json

{
  "hello": "world"
}

/home/user/dir/files/somefile.txt

text file

/home/user/dir/dir.js

var fs = require('fs');

console.log(require('./files/config.json'));
console.log(fs.readFileSync('./files/somefile.txt', 'utf8'));

If I cd into /home/user/dir and run node dir.js I will get

{ hello: 'world' }
text file

But when I run the same script from /home/user/ I get

{ hello: 'world' }

Error: ENOENT, no such file or directory './files/somefile.txt'
    at Object.openSync (fs.js:228:18)
    at Object.readFileSync (fs.js:119:15)
    at Object.<anonymous> (/home/user/dir/dir.js:4:16)
    at Module._compile (module.js:432:26)
    at Object..js (module.js:450:10)
    at Module.load (module.js:351:31)
    at Function._load (module.js:310:12)
    at Array.0 (module.js:470:10)
    at EventEmitter._tickCallback (node.js:192:40)

Using ./ worked with require but not for fs.readFileSync. That's because for fs.readFileSync, ./ translates into the cwd (in this case /home/user/). And /home/user/files/somefile.txt does not exist.

Websocket VS SSE

Web Sockets - It is a protocol which provides a full-duplex communication channel over a single TCP connection. For instance a two-way communication between the Server and Browser Since the protocol is more complicated, the server and the browser has to rely on library of websocket which is socket.io

Example - Online chat application.

SSE(Server-Sent Event) - In case of server sent event the communication is carried out from server to browser only and browser cannot send any data to the server. This kind of communication is mainly used when the need is only to show the updated data, then the server sends the message whenever the data gets updated. For instance a one-way communication between the Server to Browser. This protocol is less complicated, so no need to rely on the external library JAVASCRIPT itself provides the EventSource interface to receive the server sent messages.

Example - Online stock quotes or cricket score website.

Just get the class attribute:

var div1Class = $('#div1').attr('class');

Example

<div id="div1" class="accordion accordion_active">

To check the above div for classes contained in it

var a = ("#div1").attr('class'); 
console.log(a);

console output

accordion accordion_active

You can add a TOC manually with Markdown and HTML. Here's how I have been adding:

Create TOC at top of Jupyter Notebook:

## TOC:
* [First Bullet Header](#first-bullet)
* [Second Bullet Header](#second-bullet)

Add html anchors throughout body:

## First Bullet Header <a class="anchor" id="first-bullet"></a>

code blocks...

## Second Bullet Header <a class="anchor" id="second-bullet"></a>

code blocks...

It may not be the best approach, but it works. Hope this helps.

You can use brace expansion in bash:

cp /home/ankur/folder/{file1,abc,xyz} /path/to/target

When your path starts with a root dir i.e. C:\ in windows or / in Unix or in java resources path, it is considered to be an absolute path. Everything else is relative, so

new File("test.txt") is the same as new File("./test.txt")

new File("test/../test.txt") is the same as new File("./test/../test.txt")

The major difference between getAbsolutePath and getCanonicalPath is that the first one concatenates a parent and a child path, so it may contain dots: .. or .. getCanonicalPath will always return the same path for a particular file.

Note: File.equals uses an abstract form of a path (getAbsolutePath) to compare files, so this means that two File objects for the same might not be equal and Files are unsafe to use in collections like Map or Set.

You can try this query:

Select A.*, (select count(*) from Table1 where A.ID>=ID) as RowNo
from Table1 as A
order by A.ID

This is the best and most precise solution I've found so far.

CSS:

.social .fa {
      margin-right: 1rem;
      border: 2px #fff solid;
      border-radius: 50%;
      height: 20px;
      width: 20px;
      line-height: 20px;
      text-align: center;
      padding: 0.5rem;
    }

git reflog is your friend. Find the commit that you want to be on in that list and you can reset to it (for example:git reset --hard e870e41).

(If you didn't commit your changes... you might be in trouble - commit early, and commit often!)

For IE8 support, the "content" property cannot be empty.

To get around this I've done the following :

.ul li:after {
    content:"icon";
    text-indent:-999em;
    display:block;
    width:32px;
    height:32px;
    background:url(../img/icons/spritesheet.png) 0 -620px no-repeat;
    margin:5% 0 0 45%;
}

Note : This works with image sprites too

Try:

if start not in graph:

For more info see ProgrammerSought