Just use watch nvidia-smi, it will output the message by 2s interval in default.

For example, as the below image:

You can also use watch -n 5 nvidia-smi (-n 5 by 5s interval).

Prime numbers are numbers that are bigger than one and cannot be divided evenly by any other number except 1 and itself.

@This program will show you the given number is prime or not, and will show you for non prime number that it's divisible by (a number) which is rather than 1 or itself?@

        Console.Write("Please Enter a number: ");
        int number = int.Parse(Console.ReadLine());
        int count = 2; 
        // this is initial count number which is greater than 1

        bool prime = true;
        // used Boolean value to apply condition correctly

        int sqrtOfNumber = (int)Math.Sqrt(number); 
        // square root of input number this would help to simplify the looping.  

        while (prime && count <= sqrtOfNumber)
        {
            if ( number % count == 0)
            {
            Console.WriteLine($"{number} isn't prime and it divisible by 
                                      number {count}");  // this will generate a number isn't prime and it is divisible by a number which is rather than 1 or itself and this line will proves why it's not a prime number.
                prime = false;
            }
            
            count++;
            
        }
        if (prime && number > 1)
        
        {
            Console.WriteLine($"{number} is a prime number");
        }
        else if (prime == true)
        // if input is 1 or less than 1 then this code will generate
        {
            Console.WriteLine($"{number} isn't a prime");
        }
        

To delete file:

del PATH_TO_FILE

To delete folder with all files in it:

rmdir /s /q PATH_TO_FOLDER

To delete all files from specific folder (not deleting folder itself) is a little bit complicated. del /s *.* cannot delete folders, but removes files from all subfolder. So two commands are needed:

del /q PATH_TO_FOLDER\*.*
for /d %i in (PATH_TO_FOLDER\*.*) do @rmdir /s /q "%i"

You can create a script to delete whatever you want (folder or file) like this mydel.bat:

@echo off
setlocal enableextensions

if "%~1"=="" (
    echo Usage: %0 path
    exit /b 1
)

:: check whether it is folder or file
set ISDIR=0
set ATTR=%~a1
set DIRATTR=%ATTR:~0,1%
if /i "%DIRATTR%"=="d" set ISDIR=1

:: Delete folder or file
if %ISDIR%==1 (rmdir /s /q "%~1") else (del "%~1")
exit /b %ERRORLEVEL%

Few example of usage:

mydel.bat "path\to\folder with spaces"
mydel.bat path\to\file_or_folder

If like me you came here to look for an alternate to shuf for macOS then use randomize-lines.

Install randomize-lines(homebrew) package, which has an rl command which has similar functionality to shuf.

brew install randomize-lines

Usage: rl [OPTION]... [FILE]...
Randomize the lines of a file (or stdin).

  -c, --count=N  select N lines from the file
  -r, --reselect lines may be selected multiple times
  -o, --output=FILE
                 send output to file
  -d, --delimiter=DELIM
                 specify line delimiter (one character)
  -0, --null     set line delimiter to null character
                 (useful with find -print0)
  -n, --line-number
                 print line number with output lines
  -q, --quiet, --silent
                 do not output any errors or warnings
  -h, --help     display this help and exit
  -V, --version  output version information and exit

Try this solution:

Go to->

1. xammp ->htdocs-> then open index.php from the htdocs folder
2. you can modify the dashboard
3. restart the server

Example Code index.php :

    <?php
    if (!empty($_SERVER['HTTPS']) && ('on' == $_SERVER['HTTPS'])) {
        $uri = 'https://';
    } else {
        $uri = 'http://';
    }
    $uri .= $_SERVER['HTTP_HOST'];
    header('Location: '.$uri.'/dashboard/');
    exit;
   ?>

Usefetch and innerHTML to load div content

let url="https://server.test-cors.org/server?id=2934825&enable=true&status=200&credentials=false&methods=GET"

async function refresh() {
  btn.disabled = true;
  dynamicPart.innerHTML = "Loading..."
  dynamicPart.innerHTML = await(await fetch(url)).text();
  setTimeout(refresh,2000);
}

<div id="staticPart">
  Here is static part of page

  <button id="btn" onclick="refresh()">
    Click here to start refreshing every 2s
  </button>
</div>

<div id="dynamicPart">Dynamic part</div>

2017+ solution

The idea of function extensions comes from functional paradigm, which is natively supported since ES6:

function init(){
    doSomething();
}

// extend.js

init = (f => u => { f(u)
    doSomethingHereToo();
})(init);

init();

As per @TJCrowder's concern about stack dump, the browsers handle the situation much better today. If you save this code into test.html and run it, you get

test.html:3 Uncaught ReferenceError: doSomething is not defined
    at init (test.html:3)
    at test.html:8
    at test.html:12

Line 12: the init call, Line 8: the init extension, Line 3: the undefined doSomething() call.

Note: Much respect to veteran T.J. Crowder, who kindly answered my question many years ago, when I was a newbie. After the years, I still remember the respectfull attitude and I try to follow the good example.

Environment.NewLine or vbCrLf or Constants.vbCrLf

More information about VB.NET new line:

http://msdn.microsoft.com/en-us/library/system.environment.newline.aspx

Droply.js is perfect for this. It's simple and comes pre-packaged with a demo site that works out of the box.

you can use display:flex to do this : http://codepen.io/anon/pen/yCKuz

html,body {
  height:100%;
  width:100%;
  margin:0;
}
body {
  display:flex;
}
form {
  margin:auto;/* nice thing of auto margin if display:flex; it center both horizontal and vertical :) */
}

or display:table http://codepen.io/anon/pen/LACnF/

body, html {   
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    display:table;
}
body {
    display:table-cell;
    vertical-align:middle;
}
form {
    display:table;/* shrinks to fit content */
    margin:auto;
}

 <?php if (date("H") < "12" && date("H")>"6") { ?>
   src="<?php bloginfo('template_url'); ?>/images/img/morning.gif" 
 <?php } elseif (date("H") > "12" && date("H")<"17") { ?>
 src="<?php bloginfo('template_url'); ?>/images/img/noon.gif" 
  <?php } elseif (date("H") > "17" && date("H")<"21") { ?>
   src="<?php bloginfo('template_url'); ?>/images/img/evening.gif" 
  <?php } elseif (date("H") > "21" && date("H")<"24") { ?>
  src="<?php bloginfo('template_url'); ?>/images/img/night.gif" 
  <?php }else { ?>
  src="<?php bloginfo('template_url'); ?>/images/img/mid_night.gif" 
  <?php } ?>

I'm not sure the default hashcode is the address - I read the OpenJDK source for hashcode generation a while ago, and I remember it being something a bit more complicated. Still not something that guarantees a good distribution, perhaps. However, that is to some extent moot, as few classes you'd use as keys in a hashmap use the default hashcode - they supply their own implementations, which ought to be good.

On top of that, what you may not know (again, this is based in reading source - it's not guaranteed) is that HashMap stirs the hash before using it, to mix entropy from throughout the word into the bottom bits, which is where it's needed for all but the hugest hashmaps. That helps deal with hashes that specifically don't do that themselves, although i can't think of any common cases where you'd see that.

Finally, what happens when the table is overloaded is that it degenerates into a set of parallel linked lists - performance becomes O(n). Specifically, the number of links traversed will on average be half the load factor.

You have to select and send the form data as well:

$("#post-btn").click(function(){        
    $.post("process.php", $("#reg-form").serialize(), function(data) {
        alert(data);
    });
});

Take a look at the documentation for the jQuery serialize method, which encodes the data from the form fields into a data-string to be sent to the server.

C++17 now has a std::filesystem::directory_iterator, which can be used as

#include <string>
#include <iostream>
#include <filesystem>
namespace fs = std::filesystem;

int main() {
    std::string path = "/path/to/directory";
    for (const auto & entry : fs::directory_iterator(path))
        std::cout << entry.path() << std::endl;
}

Also, std::filesystem::recursive_directory_iterator can iterate the subdirectories as well.

"Not equals" can be expressed with the "not" operator ! and the standard .equals.

if (a.equals(b)) // a equals b
if (!a.equals(b)) // a not equal to b

You should use System property instead of environment variable for this case. Edit your tomcat scripts for JAVA_OPTS and add property like:

-DAPP_MASTER_PASSWORD=foo

and in your code, write

System.getProperty("APP_MASTER_PASSWORD");

You can do this in Eclipse as well, instead of JAVA_OPTS, copy the line in VM parameters inside run configurations.

These are timeout values enforced by JVM for TCP connection establishment and waiting on reading data from socket.

If the value is set to infinity, you will not wait forever. It simply means JVM doesn't have timeout and OS will be responsible for all the timeouts. However, the timeouts on OS may be really long. On some slow network, I've seen timeouts as long as 6 minutes.

Even if you set the timeout value for socket, it may not work if the timeout happens in the native code. We can reproduce the problem on Linux by connecting to a host blocked by firewall or unplugging the cable on switch.

The only safe approach to handle TCP timeout is to run the connection code in a different thread and interrupt the thread when it takes too long.

When this problem comes up with multiprocessing a simple solution is to switch from Pool to ThreadPool. This can be done with no change of code other than the import-

from multiprocessing.pool import ThreadPool as Pool

This works because ThreadPool shares memory with the main thread, rather than creating a new process- this means that pickling is not required.

The downside to this method is that python isn't the greatest language with handling threads- it uses something called the Global Interpreter Lock to stay thread safe, which can slow down some use cases here. However, if you're primarily interacting with other systems (running HTTP commands, talking with a database, writing to filesystems) then your code is likely not bound by CPU and won't take much of a hit. In fact I've found when writing HTTP/HTTPS benchmarks that the threaded model used here has less overhead and delays, as the overhead from creating new processes is much higher than the overhead for creating new threads.

So if you're processing a ton of stuff in python userspace this might not be the best method.

UIActionSheet is deprecated in iOS 8.

I am using following:

// Create the AlertController
let actionSheetController = UIAlertController(title: "Please select", message: "How you would like to utilize the app?", preferredStyle: .ActionSheet)

// Create and add the Cancel action
let cancelAction = UIAlertAction(title: "Cancel", style: .Cancel) { action -> Void in
    // Just dismiss the action sheet
}
actionSheetController.addAction(cancelAction)

// Create and add first option action
let takePictureAction = UIAlertAction(title: "Consumer", style: .Default) { action -> Void in
    self.performSegueWithIdentifier("segue_setup_customer", sender: self)
}
actionSheetController.addAction(takePictureAction)

// Create and add a second option action
let choosePictureAction = UIAlertAction(title: "Service provider", style: .Default) { action -> Void in
    self.performSegueWithIdentifier("segue_setup_provider", sender: self)
}
actionSheetController.addAction(choosePictureAction)

// We need to provide a popover sourceView when using it on iPad
actionSheetController.popoverPresentationController?.sourceView = sender as UIView

// Present the AlertController
self.presentViewController(actionSheetController, animated: true, completion: nil)

I came across the same problem and solved it as following for VB.NET. It's the .NET Framework so you should be possible to adapt. Wanted to compare my solution and now I see that nobody seems to solve it my way.

Make a field declaration.

Private _currentDataView as DataView

So looping through all the rows and searching for a cell containing a value that I know is next to the cell I want to change works for me.

Public Sub SetCellValue(ByVal value As String)
    Dim dataView As DataView = _currentDataView

    For i As Integer = 0 To dataView.Count - 1
        If dataView(i).Row.Item("projID").ToString.Equals("139") Then
            dataView(i).Row.Item("Comment") = value
            Exit For ' Exit early to save performance
        End If
    Next
End Sub

So that you can better understand it. I know that ColumnName "projID" is 139. I loop until I find it and then I can change the value of "ColumnNameofCell" in my case "Comment". I use this for comments added on runtime.

If you just need some views not to use CSRF, you can use @csrf_exempt:

from django.views.decorators.csrf import csrf_exempt

@csrf_exempt
def my_view(request):
    return HttpResponse('Hello world')

You can find more examples and other scenarios in the Django documentation:

• https://docs.djangoproject.com/en/dev/ref/csrf/#edge-cases

Here is way to avoid absolute divs and tables if you know parent's height:

<div class="parent">
    <div class="child"> <a href="#">Home</a>
    </div>
</div>

CSS:

.parent {
    line-height:80px;
    border: 1px solid black;
}
.child {
    line-height:normal;
    display: inline-block;
    vertical-align:bottom;
    border: 1px solid red;
}

JsFiddle:

Example

Can this be done with bootstrap 3's carousel? I'm hoping I won't have to go hunting for yet another jQuery plugin

As of 2013-12-08 the answer is no. The effect you are looking for is not possible using Bootstrap 3's generic carousel plugin. However, here's a simple jQuery plugin that seems to do exactly what you want http://sorgalla.com/jcarousel/

Extending @RobBednark's solution to a specific Windows + PuTTY scenario, you can do so:

1. Generate SSH key pair with PuTTYgen (following Manually generating your SSH key in Windows), saving it to a PPK file;

2. With the context menu in Windows Explorer, choose Edit with PuTTYgen. It will prompt for a password.

If you type the wrong password, it will just prompt again.

Note, if you like to type, use the following command on a folder that contains the PPK file: puttygen private-key.ppk -y.

Simple Import os package and run below command.

import os
os.system("python test.py")

This worked for me:

echo "myuser ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers

where your user is "myuser"

for a Docker image, that would just be:

RUN echo "myuser ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers

this works for me: v=$(cat <file_path>) echo $v

Try this:

insert into [table] ([data])
output inserted.id, inserted.data into table2
select [data] from [external_table]

UPDATE: Re:

Denis - this seems very close to what I want to do, but perhaps you could fix the following SQL statement for me? Basically the [data] in [table1] and the [data] in [table2] represent two different/distinct columns from [external_table]. The statement you posted above only works when you want the [data] columns to be the same.

INSERT INTO [table1] ([data]) 
OUTPUT [inserted].[id], [external_table].[col2] 
INTO [table2] SELECT [col1] 
FROM [external_table] 

It's impossible to output external columns in an insert statement, so I think you could do something like this

merge into [table1] as t
using [external_table] as s
on 1=0 --modify this predicate as necessary
when not matched then insert (data)
values (s.[col1])
output inserted.id, s.[col2] into [table2]
;

Well, I had a similar challenge. Using the inspect element tool in Firefox, I was able to trace the markup and the CSS used to style the link when clicked. On click, the list item (li) is given a class of .open and it's the anchor tag in the class that is formatted with the grey color background.

To fix this, just add this to your stylesheet.

.nav .open > a
{
    background:#759ad6;
    // Put in styling
}

You seem to be specifying the form to use a HTTP 'GET' request using FormMethod.Get. This will not work unless you tell it to do a post as that is what you seem to want the ActionResult to do. This will probably work by changing FormMethod.Get to FormMethod.Post.

As well as this you may also want to think about how Get and Post requests work and how these interact with the Model.

This solution unlock me after couple of hours of research :

In the configuration initialize the core() option

@Override
public void configure(HttpSecurity http) throws Exception {
http
    .cors()
    .and()
    .etc
}

Initialize your Credential, Origin, Header and Method as your wish in the corsFilter.

@Bean
public CorsFilter corsFilter() {
  UrlBasedCorsConfigurationSource source = new 
  UrlBasedCorsConfigurationSource();
  CorsConfiguration config = new CorsConfiguration();
  config.setAllowCredentials(true);
  config.addAllowedOrigin("*");
  config.addAllowedHeader("*");
  config.addAllowedMethod("*");
  source.registerCorsConfiguration("/**", config);
  return new CorsFilter(source);
}

I didn't need to use this class:

@Bean
public CorsConfigurationSource corsConfigurationSource() {
}

As mentioned in other answers: For a table with search, select and pagination "ng-grid" is the best options. A couple of things I have come across I will mention which might be useful while implementing:

To set env:

1. http://www.json-generator.com/ to generate JSON data. Its a pretty cool tool to get your sample data set to make development faster.

2. You can check this plunker for your implementation. I have modified to include: search, select and pagination http://plnkr.co/edit/gJPBz0pVxGzKlI8MGOit?p=preview

You can check this tutorial about Smart table, Gives all the info you need: http://lorenzofox3.github.io/smart-table-website/

Then the next question is bootstrap 3 : Its not exactly but this templates looks good. - You can just use https://github.com/angular-ui/bootstrap/tree/master/template all the templates are well written.

I can go on about how to convert bootstrap 3 to angularjs but its already mentioned in following links:

• Bootstrap 3 compatible with current AngularJS bootstrap directives?
• https://github.com/angular-ui/bootstrap/issues/331

please note that regarding smart-table you have to check if it ready for your angular version

Try this:

    @Repository
    @Qualifier("birthdayRepository")
    public interface BirthdayRepository extends MongoRepository<BirthDay,String> {
        public BirthDay findByFirstName(String firstName);
    }

And when injecting the bean:

    @Autowired
    @Qualifier("birthdayRepository")
    private BirthdayRepository repository;

If not, check your CoponentScan in your config.

You can setup environment variables in your code as follows:

import sys,os,os.path
sys.path.append(os.path.expanduser('~/code/eol_hsrl_python'))
os.environ['HSRL_INSTRUMENT']='gvhsrl'
os.environ['HSRL_CONFIG']=os.path.expanduser('~/hsrl_config')

This if of course a temporary fix, to get a permanent one, you probably need to export the variables into your ~.profile, more information can be found here

I'm not entirely sure what you want, and your last line of code does not help either, but anyway:

"Chained" filtering is done by "chaining" the criteria in the boolean index.

In [96]: df
Out[96]:
   A  B  C  D
a  1  4  9  1
b  4  5  0  2
c  5  5  1  0
d  1  3  9  6

In [99]: df[(df.A == 1) & (df.D == 6)]
Out[99]:
   A  B  C  D
d  1  3  9  6

If you want to chain methods, you can add your own mask method and use that one.

In [90]: def mask(df, key, value):
   ....:     return df[df[key] == value]
   ....:

In [92]: pandas.DataFrame.mask = mask

In [93]: df = pandas.DataFrame(np.random.randint(0, 10, (4,4)), index=list('abcd'), columns=list('ABCD'))

In [95]: df.ix['d','A'] = df.ix['a', 'A']

In [96]: df
Out[96]:
   A  B  C  D
a  1  4  9  1
b  4  5  0  2
c  5  5  1  0
d  1  3  9  6

In [97]: df.mask('A', 1)
Out[97]:
   A  B  C  D
a  1  4  9  1
d  1  3  9  6

In [98]: df.mask('A', 1).mask('D', 6)
Out[98]:
   A  B  C  D
d  1  3  9  6

If you happened to know the general location of cell towers, you could check to see if the current cell tower matches the location given (within an error margin of something large, like 10 or more miles).

For example, if your app unlocks features only if the user is in a specific location (your store, for example), you could check gps as well as cell towers. Currently, no gps spoofing app also spoofs the cell towers, so you could see if someone across the country is simply trying to spoof their way into your special features (I'm thinking of the Disney Mobile Magic app, for one example).

This is how the Llama app manages location by default, since checking cell tower ids are much less battery intensive than gps. It isn't useful for very specific locations, but if home and work are several miles away, it can distinguish between the two general locations very easily.

Of course, this would require the user to have a cell signal at all. And you would have to know all the cell towers ids in the area --on all network providers-- or you would run the risk of a false negative.

I think this should do the trick. I just added an if(isset and added concatenation to the variables in the body to separate PHP from HTML.

<?php
    $name = $_POST['name'];
    $email = $_POST['email'];
    $message = $_POST['message'];
    $from = 'From: yoursite.com'; 
    $to = '[email protected]'; 
    $subject = 'Customer Inquiry';
    $body = "From:" .$name."\r\n E-Mail:" .$email."\r\n Message:\r\n" .$message;

if (isset($_POST['submit'])) 
{
    if (mail ($to, $subject, $body, $from)) 
    { 
        echo '<p>Your message has been sent!</p>';
    } 
    else 
    { 
        echo '<p>Something went wrong, go back and try again!</p>'; 
    }
}

?>

1. Implement a slot in your QMainWindow where you will open your new Window,
2. Place a widget on your QMainWindow,
3. Connect a signal from this widget to a slot from the QMainWindow (for example: if the widget is a QPushButton connect the signal click() to the QMainWindow custom slot you have created).

Code example:

MainWindow.h

// ...
include "newwindow.h"
// ...
public slots:
   void openNewWindow();
// ...
private:
   NewWindow *mMyNewWindow;
// ...
}

MainWindow.cpp

// ...
   MainWindow::MainWindow()
   {
      // ...
      connect(mMyButton, SIGNAL(click()), this, SLOT(openNewWindow()));
      // ...
   }
// ...
void MainWindow::openNewWindow()
{
   mMyNewWindow = new NewWindow(); // Be sure to destroy your window somewhere
   mMyNewWindow->show();
   // ...
}

This is an example on how display a custom new window. There are a lot of ways to do this.

I wanted to share this because I spent a long time searching for an easy way to implement this in a java program I'm working on. This doesn't quite give the output you're looking for but its close. The function in mysql called GROUP_CONCAT() worked really well for specifying how many results to return in each group. Using LIMIT or any of the other fancy ways of trying to do this with COUNT didn't work for me. So if you're willing to accept a modified output, its a great solution. Lets say I have a table called 'student' with student ids, their gender, and gpa. Lets say I want to top 5 gpas for each gender. Then I can write the query like this

SELECT sex, SUBSTRING_INDEX(GROUP_CONCAT(cast(gpa AS char ) ORDER BY gpa desc), ',',5) 
AS subcategories FROM student GROUP BY sex;

Note that the parameter '5' tells it how many entries to concatenate into each row

And the output would look something like

+--------+----------------+
| Male   | 4,4,4,4,3.9    |
| Female | 4,4,3.9,3.9,3.8|
+--------+----------------+

You can also change the ORDER BY variable and order them a different way. So if I had the student's age I could replace the 'gpa desc' with 'age desc' and it will work! You can also add variables to the group by statement to get more columns in the output. So this is just a way I found that is pretty flexible and works good if you are ok with just listing results.

To avoid hyphenation in already hyphenated word I used non-breaking space ~ in combination with backward space \!. For example, command

3~\!\!\!\!-~\!\!\!D

used in the text, suppress hyphenation in word 3-D. Probably not the best solution, but it worked for me!

Choose another theme (other than Holo, for example Theme)

When you create the style incorrectly or from an existing style, this problem usually occurs. So select the "Graphical Layout" select "AppTheme" (The tab with a blue star). And select any of the predefined style. In my case "Light" which should resolve the problem.

Try to 'Invalidate caches & restart'.

Restart your Android Studio by choosing this option. It may take some time.

Then, if still doesn't work try to rebuild your project.

Your example data does not have any duplicates, but your solution handle them automatically. This means that potentially some of the answers won't match to results of your function in case of duplicates.
Here is my solution which address duplicates the same way as yours. It also scales great!

a1 <- data.frame(a = 1:5, b=letters[1:5])
a2 <- data.frame(a = 1:3, b=letters[1:3])
rows.in.a1.that.are.not.in.a2  <- function(a1,a2)
{
    a1.vec <- apply(a1, 1, paste, collapse = "")
    a2.vec <- apply(a2, 1, paste, collapse = "")
    a1.without.a2.rows <- a1[!a1.vec %in% a2.vec,]
    return(a1.without.a2.rows)
}

library(data.table)
setDT(a1)
setDT(a2)

# no duplicates - as in example code
r <- fsetdiff(a1, a2)
all.equal(r, rows.in.a1.that.are.not.in.a2(a1,a2))
#[1] TRUE

# handling duplicates - make some duplicates
a1 <- rbind(a1, a1, a1)
a2 <- rbind(a2, a2, a2)
r <- fsetdiff(a1, a2, all = TRUE)
all.equal(r, rows.in.a1.that.are.not.in.a2(a1,a2))
#[1] TRUE

It needs data.table 1.9.8+

For SQLLite you will need to concat the strings

select * from list1 l, list2 ll 
WHERE l.name like "%"||ll.alias||"%";

Click Search --> Replace --> Find What: \0 Replace with: "empty" Search mode: Extended --> Replace all

if you just need the hour of the day

let calendar = NSCalendar.currentCalendar()
var hour = calendar.component(.Hour,fromDate: NSDate())

Lambda Expressions

To add on to jk.'s excellent answer, you can now pass a method more easily using Lambda Expressions (in Java 8). First, some background. A functional interface is an interface that has one and only one abstract method, although it can contain any number of default methods (new in Java 8) and static methods. A lambda expression can quickly implement the abstract method, without all the unnecessary syntax needed if you don't use a lambda expression.

Without lambda expressions:

obj.aMethod(new AFunctionalInterface() {
    @Override
    public boolean anotherMethod(int i)
    {
        return i == 982
    }
});

With lambda expressions:

obj.aMethod(i -> i == 982);

Here is an excerpt from the Java tutorial on Lambda Expressions:

Syntax of Lambda Expressions

A lambda expression consists of the following:

• A comma-separated list of formal parameters enclosed in parentheses. The CheckPerson.test method contains one parameter, p, which represents an instance of the Person class.
  
  Note: You can omit the data type of the parameters in a lambda expression. In addition, you can omit the parentheses if there is only one parameter. For example, the following lambda expression is also valid:

  p -> p.getGender() == Person.Sex.MALE 
      && p.getAge() >= 18
      && p.getAge() <= 25
  

• The arrow token, ->

• A body, which consists of a single expression or a statement block. This example uses the following expression:

  p.getGender() == Person.Sex.MALE 
      && p.getAge() >= 18
      && p.getAge() <= 25
  

  If you specify a single expression, then the Java runtime evaluates the expression and then returns its value. Alternatively, you can use a return statement:

  p -> {
      return p.getGender() == Person.Sex.MALE
          && p.getAge() >= 18
          && p.getAge() <= 25;
  }
  

  A return statement is not an expression; in a lambda expression, you must enclose statements in braces ({}). However, you do not have to enclose a void method invocation in braces. For example, the following is a valid lambda expression:

  email -> System.out.println(email)
  

Note that a lambda expression looks a lot like a method declaration; you can consider lambda expressions as anonymous methods—methods without a name.

Here is how you can "pass a method" using a lambda expression:

^{Note: this uses a new standard functional interface, java.util.function.IntConsumer.}

class A {
    public static void methodToPass(int i) { 
        // do stuff
    }
}

import java.util.function.IntConsumer;

class B {
    public void dansMethod(int i, IntConsumer aMethod) {
        /* you can now call the passed method by saying aMethod.accept(i), and it
        will be the equivalent of saying A.methodToPass(i) */
    }
}

class C {
    B b = new B();

    public C() {
        b.dansMethod(100, j -> A.methodToPass(j));   //Lambda Expression here
    }
}

The above example can be shortened even more using the :: operator.

public C() {
    b.dansMethod(100, A::methodToPass);
}

If you are using Visual Studio. The reason you might be recieving this error may be because you originally created a new header file.h and then renamed it to file.cpp where you placed your main() function.

To fix the issue right click file.cpp -> click Properties go to
Configuration Properties -> General ->Item Type and change its value to C/C++ compiler instead of C/C++ header.

1. the condition num2 < num1 should be num2 <= num1 if num2 has to be greater than num1
2. not knowing what the kb object is, I'd read a String and then trying Integer.parseInt() and if you don't catch an exception then it's a number, if you do, read a new one, maybe by setting num2 to Integer.MIN_VALUE and using the same type of logic in your example.

I use the following class which implements the Runnable interface. With this class you can easily create new threads with arguments

public abstract class RunnableArg implements Runnable {

    Object[] m_args;

    public RunnableArg() {
    }

    public void run(Object... args) {
        setArgs(args);
        run();
    }

    public void setArgs(Object... args) {
        m_args = args;
    }

    public int getArgCount() {
        return m_args == null ? 0 : m_args.length;
    }

    public Object[] getArgs() {
        return m_args;
    }
}

If you are using jQuery 1.2 or newer, you can simply use these:

$(window).width();
$(document).width();
$(window).height();
$(document).height();

From there it is a simple matter to decide the height of your element.

Updated March 31st, 2016:

We have announced that Visual Studio now includes Xamarin at no extra cost, including Community Edition, which is free for individual developers, open source projects, academic research, education, and small professional teams. There is no size restriction on the Community Edition and offers the same features as the Pro & Enterprise editions. Read more about the update here: https://blog.xamarin.com/xamarin-for-all/

Be sure to browse the store on how to download and get started: https://visualstudio.microsoft.com/vs/pricing/ and there is a nice FAQ section: https://visualstudio.microsoft.com/vs/support/

Security note: Disabling security checks is dangerous and should be avoided

You can disable security checks globally for all requests of the default client:

package main

import (
    "fmt"
    "net/http"
    "crypto/tls"
)

func main() {
    http.DefaultTransport.(*http.Transport).TLSClientConfig = &tls.Config{InsecureSkipVerify: true}
    _, err := http.Get("https://golang.org/")
    if err != nil {
        fmt.Println(err)
    }
}

You can disable security check for a client:

package main

import (
    "fmt"
    "net/http"
    "crypto/tls"
)

func main() {
    tr := &http.Transport{
        TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
    }
    client := &http.Client{Transport: tr}
    _, err := client.Get("https://golang.org/")
    if err != nil {
        fmt.Println(err)
    }
}

As mentioned in JavaDoc (https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/CountDownLatch.html), CountDownLatch is a synchronization aid, introduced in Java 5. Here the synchronization does not mean restricting access to a critical section. But rather sequencing actions of different threads. The type of synchronization achieved through CountDownLatch is similar to that of Join. Assume that there is a thread "M" which needs to wait for other worker threads "T1", "T2", "T3" to complete its tasks Prior to Java 1.5, the way this can be done is, M running the following code

    T1.join();
    T2.join();
    T3.join();

The above code makes sure that thread M resumes its work after T1, T2, T3 completes its work. T1, T2, T3 can complete their work in any order. The same can be achieved through CountDownLatch, where T1,T2, T3 and thread M share same CountDownLatch object.
"M" requests : countDownLatch.await();
where as "T1","T2","T3" does countDownLatch.countdown();

One disadvantage with the join method is that M has to know about T1, T2, T3. If there is a new worker thread T4 added later, then M has to be aware of it too. This can be avoided with CountDownLatch. After implementation the sequence of action would be [T1,T2,T3](the order of T1,T2,T3 could be anyway) -> [M]

Based on the Worker objects methods mentioned in other answers, I decided to see if I could expand on the solution to invoke more threads - in this case the optimal number the machine can run and spin up multiple workers with indeterminate completion times. To do this I still need to subclass QThread - but only to assign a thread number and to 'reimplement' the signals 'finished' and 'started' to include their thread number.

I've focused quite a bit on the signals between the main gui, the threads, and the workers.

Similarly, others answers have been a pains to point out not parenting the QThread but I don't think this is a real concern. However, my code also is careful to destroy the QThread objects.

However, I wasn't able to parent the worker objects so it seems desirable to send them the deleteLater() signal, either when the thread function is finished or the GUI is destroyed. I've had my own code hang for not doing this.

Another enhancement I felt was necessary was was reimplement the closeEvent of the GUI (QWidget) such that the threads would be instructed to quit and then the GUI would wait until all the threads were finished. When I played with some of the other answers to this question, I got QThread destroyed errors.

Perhaps it will be useful to others. I certainly found it a useful exercise. Perhaps others will know a better way for a thread to announce it identity.

#!/usr/bin/env python3
#coding:utf-8
# Author:   --<>
# Purpose:  To demonstrate creation of multiple threads and identify the receipt of thread results
# Created: 19/12/15

import sys


from PyQt4.QtCore import QThread, pyqtSlot, pyqtSignal
from PyQt4.QtGui import QApplication, QLabel, QWidget, QGridLayout

import sys
import worker

class Thread(QThread):
    #make new signals to be able to return an id for the thread
    startedx = pyqtSignal(int)
    finishedx = pyqtSignal(int)

    def __init__(self,i,parent=None):
        super().__init__(parent)
        self.idd = i

        self.started.connect(self.starttt)
        self.finished.connect(self.finisheddd)

    @pyqtSlot()
    def starttt(self):
        print('started signal from thread emitted')
        self.startedx.emit(self.idd) 

    @pyqtSlot()
    def finisheddd(self):
        print('finished signal from thread emitted')
        self.finishedx.emit(self.idd)

class Form(QWidget):

    def __init__(self):
        super().__init__()

        self.initUI()

        self.worker={}
        self.threadx={}
        self.i=0
        i=0

        #Establish the maximum number of threads the machine can optimally handle
        #Generally relates to the number of processors

        self.threadtest = QThread(self)
        self.idealthreadcount = self.threadtest.idealThreadCount()

        print("This machine can handle {} threads optimally".format(self.idealthreadcount))

        while i <self.idealthreadcount:
            self.setupThread(i)
            i+=1

        i=0
        while i<self.idealthreadcount:
            self.startThread(i)
            i+=1

        print("Main Gui running in thread {}.".format(self.thread()))


    def setupThread(self,i):

        self.worker[i]= worker.Worker(i)  # no parent!
        #print("Worker object runningt in thread {} prior to movetothread".format(self.worker[i].thread()) )
        self.threadx[i] = Thread(i,parent=self)  #  if parent isn't specified then need to be careful to destroy thread 
        self.threadx[i].setObjectName("python thread{}"+str(i))
        #print("Thread object runningt in thread {} prior to movetothread".format(self.threadx[i].thread()) )
        self.threadx[i].startedx.connect(self.threadStarted)
        self.threadx[i].finishedx.connect(self.threadFinished)

        self.worker[i].finished.connect(self.workerFinished)
        self.worker[i].intReady.connect(self.workerResultReady)

        #The next line is optional, you may want to start the threads again without having to create all the code again.
        self.worker[i].finished.connect(self.threadx[i].quit)

        self.threadx[i].started.connect(self.worker[i].procCounter)

        self.destroyed.connect(self.threadx[i].deleteLater)
        self.destroyed.connect(self.worker[i].deleteLater)

        #This is the key code that actually get the worker code onto another processor or thread.
        self.worker[i].moveToThread(self.threadx[i])

    def startThread(self,i):
        self.threadx[i].start()

    @pyqtSlot(int)
    def threadStarted(self,i):
        print('Thread {}  started'.format(i))
        print("Thread priority is {}".format(self.threadx[i].priority()))        


    @pyqtSlot(int)
    def threadFinished(self,i):
        print('Thread {} finished'.format(i))




    @pyqtSlot(int)
    def threadTerminated(self,i):
        print("Thread {} terminated".format(i))

    @pyqtSlot(int,int)
    def workerResultReady(self,j,i):
        print('Worker {} result returned'.format(i))
        if i ==0:
            self.label1.setText("{}".format(j))
        if i ==1:
            self.label2.setText("{}".format(j))
        if i ==2:
            self.label3.setText("{}".format(j))
        if i ==3:
            self.label4.setText("{}".format(j)) 

        #print('Thread {} has started'.format(self.threadx[i].currentThreadId()))    

    @pyqtSlot(int)
    def workerFinished(self,i):
        print('Worker {} finished'.format(i))

    def initUI(self):
        self.label1 = QLabel("0")
        self.label2= QLabel("0")
        self.label3= QLabel("0")
        self.label4 = QLabel("0")
        grid = QGridLayout(self)
        self.setLayout(grid)
        grid.addWidget(self.label1,0,0)
        grid.addWidget(self.label2,0,1) 
        grid.addWidget(self.label3,0,2) 
        grid.addWidget(self.label4,0,3) #Layout parents the self.labels

        self.move(300, 150)
        self.setGeometry(0,0,300,300)
        #self.size(300,300)
        self.setWindowTitle('thread test')
        self.show()

    def closeEvent(self, event):
        print('Closing')

        #this tells the threads to stop running
        i=0
        while i <self.idealthreadcount:
            self.threadx[i].quit()
            i+=1

         #this ensures window cannot be closed until the threads have finished.
        i=0
        while i <self.idealthreadcount:
            self.threadx[i].wait() 
            i+=1        


        event.accept()


if __name__=='__main__':
    app = QApplication(sys.argv)
    form = Form()
    sys.exit(app.exec_())

And the worker code below

#!/usr/bin/env python3
#coding:utf-8
# Author:   --<>
# Purpose:  Stack Overflow
# Created: 19/12/15

import sys
import unittest


from PyQt4.QtCore import QThread, QObject, pyqtSignal, pyqtSlot
import time
import random


class Worker(QObject):
    finished = pyqtSignal(int)
    intReady = pyqtSignal(int,int)

    def __init__(self, i=0):
        '''__init__ is called while the worker is still in the Gui thread. Do not put slow or CPU intensive code in the __init__ method'''

        super().__init__()
        self.idd = i



    @pyqtSlot()
    def procCounter(self): # This slot takes no params
        for j in range(1, 10):
            random_time = random.weibullvariate(1,2)
            time.sleep(random_time)
            self.intReady.emit(j,self.idd)
            print('Worker {0} in thread {1}'.format(self.idd, self.thread().idd))

        self.finished.emit(self.idd)


if __name__=='__main__':
    unittest.main()

you can use too:

val frases = arrayOf("texto01","texto02 ","anotherText","and ")

for example.

Consult your basic mathematics course, log n / log 2. It doesn't matter whether you choose log or log10in this case, dividing by the log of the new base does the trick.

I solved deleting *.snap from the workspace dir (and all subdirectories):

metadata\.plugins\*.snap

Check out this.

from subprocess import call 
with open('directory_of_logfile/logfile.txt', 'w') as f:
   call(['python', 'directory_of_called_python_file/called_python_file.py'], stdout=f)

python -c 'import os; print (os.path.getsize("... filename ..."))'

portable, all flavours of python, avoids variation in stat dialects

Here's how I did it:

A = ['a','b','c']
B = ['c']
logic = [(x in B) for x in A]
if True in logic:
    do something

I know this is a very old question and the problem is marked as fixed. However, if someone with a case like mine where the table have trigger for data logging on update events, this will cause problem. Both the columns will get the update and log will make useless entries. The way I did

IF (CONDITION) IS TRUE
BEGIN
    UPDATE table SET columnx = 25
END
ELSE
BEGIN
    UPDATE table SET columny = 25
END

Now this have another benefit that it does not have unnecessary writes on the table like the above solutions.

The split function separates each part of text with the separator you provide, and you provided "|". So the result would be an array containing "Shimla", "1" and "http://vinspro.org/travel/ind/". You could manipulate that to get the third one, "http://vinspro.org/travel/ind/", and here's an example:

var str="Shimla|1|http://vinspro.org/travel/ind/";
var n = str.split('|');
alert(n[2]); 

As mentioned in other answers, this code would differ depending on if it was a string ($(str).split('|');), a textbox input ($(str).val().split('|');), or a DOM element ($(str).text().split('|');).

You could also just use plain JavaScript to get all the stuff after 9 characters, which would be "http://vinspro.org/travel/ind/". Here's an example:

var str="Shimla|1|http://vinspro.org/travel/ind/";
var n=str.substr(9);
alert(n);

A possible solution is to convert the entire database to UTF8 (see also this question).

What you may want is

int x = reinterpret_cast<int>(arg);

This allows you to reinterpret the void * as an int.

In C#, float is an alias for System.Single (a bit like intis an alias for System.Int32).

Abstraction is a means of hiding details in order to simplify an interface.

So, using a car as an example, all of the controls in a car are abstractions. This allows you to operate a vehicle without understanding the underlying details of the steering, acceleration, or deceleration systems.

A good abstraction is one that standardizes an interface broadly, across multiple instances of a similar problem. A great abstraction can change an industry.

The modern steering wheel, brake pedal, and gas pedal are all examples of great abstractions. Car steering initially looked more like bicycle steering. And both brakes and throttles were operated by hand. But the abstractions we use today were so powerful, they swept the industry.

--

Encapsulation is a means of hiding details in order to protect them from outside manipulation.

Encapsulation is what prevents the driver from manipulating the way the car drives — from the stiffness of the steering, suspension, and braking, to the characteristics of the throttle, and transmission. Most cars do not provide interfaces for changing any of these things. This encapsulation ensures that the vehicle will operate as the manufacturer intended.

Some cars offer a small number of driving modes — like luxury, sport, and economy — which allow the driver to change several of these attributes together at once. By providing driving modes, the manufacturer is allowing the driver some control over the experience while preventing them from selecting a combination of attributes that would render the vehicle less enjoyable or unsafe. In this way, the manufacturer is hiding the details to prevent unsafe manipulations. This is encapsulation.

It might me an issue about pluralizing of table names. You can turn off this convention using the snippet below.

 protected override void OnModelCreating(DbModelBuilder modelBuilder)
 {
     base.OnModelCreating(modelBuilder);
     modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
 }

The closest thing would be the bind function:

http://api.jquery.com/bind/

$('#foo').bind('click', function() {
  alert('User clicked on "foo."');
});

Apparently, no.

Here's the options:

• Use Type.IsSubclassOf
• Use Type.IsAssignableFrom
• is and as

Type.IsSubclassOf

As you've already found out, this will not work if the two types are the same, here's a sample LINQPad program that demonstrates:

void Main()
{
    typeof(Derived).IsSubclassOf(typeof(Base)).Dump();
    typeof(Base).IsSubclassOf(typeof(Base)).Dump();
}

public class Base { }
public class Derived : Base { }

Output:

True
False

Which indicates that Derived is a subclass of Base, but that Baseis (obviously) not a subclass of itself.

Type.IsAssignableFrom

Now, this will answer your particular question, but it will also give you false positives. As Eric Lippert has pointed out in the comments, while the method will indeed return True for the two above questions, it will also return True for these, which you probably don't want:

void Main()
{
    typeof(Base).IsAssignableFrom(typeof(Derived)).Dump();
    typeof(Base).IsAssignableFrom(typeof(Base)).Dump();
    typeof(int[]).IsAssignableFrom(typeof(uint[])).Dump();
}

public class Base { }
public class Derived : Base { }

Here you get the following output:

True
True
True

The last True there would indicate, if the method only answered the question asked, that uint[] inherits from int[] or that they're the same type, which clearly is not the case.

So IsAssignableFrom is not entirely correct either.

is and as

The "problem" with is and as in the context of your question is that they will require you to operate on the objects and write one of the types directly in code, and not work with Type objects.

In other words, this won't compile:

SubClass is BaseClass
^--+---^
   |
   +-- need object reference here

nor will this:

typeof(SubClass) is typeof(BaseClass)
                    ^-------+-------^
                            |
                            +-- need type name here, not Type object

nor will this:

typeof(SubClass) is BaseClass
^------+-------^
       |
       +-- this returns a Type object, And "System.Type" does not
           inherit from BaseClass

Conclusion

While the above methods might fit your needs, the only correct answer to your question (as I see it) is that you will need an extra check:

typeof(Derived).IsSubclassOf(typeof(Base)) || typeof(Derived) == typeof(Base);

which of course makes more sense in a method:

public bool IsSameOrSubclass(Type potentialBase, Type potentialDescendant)
{
    return potentialDescendant.IsSubclassOf(potentialBase)
           || potentialDescendant == potentialBase;
}

Use this:

function get_millis(){
  list($usec, $sec) = explode(' ', microtime());
  return (int) ((int) $sec * 1000 + ((float) $usec * 1000));
}

Bye

var script = (<HTMLScriptElement[]><any>document.getElementsByName(id))[0];    

This answer should be enough to get you set up to follow this tutorial on Building a functional search component with MongoDB, Elasticsearch, and AngularJS.

If you're looking to use faceted search with data from an API then Matthiasn's BirdWatch Repo is something you might want to look at.

So here's how you can setup a single node Elasticsearch "cluster" to index MongoDB for use in a NodeJS, Express app on a fresh EC2 Ubuntu 14.04 instance.

Make sure everything is up to date.

sudo apt-get update

Install NodeJS.

sudo apt-get install nodejs
sudo apt-get install npm

Install MongoDB - These steps are straight from MongoDB docs. Choose whatever version you're comfortable with. I'm sticking with v2.4.9 because it seems to be the most recent version MongoDB-River supports without issues.

Import the MongoDB public GPG Key.

sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10

Update your sources list.

echo 'deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen' | sudo tee /etc/apt/sources.list.d/mongodb.list

Get the 10gen package.

sudo apt-get install mongodb-10gen

Then pick your version if you don't want the most recent. If you are setting your environment up on a windows 7 or 8 machine stay away from v2.6 until they work some bugs out with running it as a service.

apt-get install mongodb-10gen=2.4.9

Prevent the version of your MongoDB installation being bumped up when you update.

echo "mongodb-10gen hold" | sudo dpkg --set-selections

Start the MongoDB service.

sudo service mongodb start

Your database files default to /var/lib/mongo and your log files to /var/log/mongo.

Create a database through the mongo shell and push some dummy data into it.

mongo YOUR_DATABASE_NAME
db.createCollection(YOUR_COLLECTION_NAME)
for (var i = 1; i <= 25; i++) db.YOUR_COLLECTION_NAME.insert( { x : i } )

Now to Convert the standalone MongoDB into a Replica Set.

First Shutdown the process.

mongo YOUR_DATABASE_NAME
use admin
db.shutdownServer()

Now we're running MongoDB as a service, so we don't pass in the "--replSet rs0" option in the command line argument when we restart the mongod process. Instead, we put it in the mongod.conf file.

vi /etc/mongod.conf

Add these lines, subbing for your db and log paths.

replSet=rs0
dbpath=YOUR_PATH_TO_DATA/DB
logpath=YOUR_PATH_TO_LOG/MONGO.LOG

Now open up the mongo shell again to initialize the replica set.

mongo DATABASE_NAME
config = { "_id" : "rs0", "members" : [ { "_id" : 0, "host" : "127.0.0.1:27017" } ] }
rs.initiate(config)
rs.slaveOk() // allows read operations to run on secondary members.

Now install Elasticsearch. I'm just following this helpful Gist.

Make sure Java is installed.

sudo apt-get install openjdk-7-jre-headless -y

Stick with v1.1.x for now until the Mongo-River plugin bug gets fixed in v1.2.1.

wget https://download.elasticsearch.org/elasticsearch/elasticsearch/elasticsearch-1.1.1.deb
sudo dpkg -i elasticsearch-1.1.1.deb

curl -L http://github.com/elasticsearch/elasticsearch-servicewrapper/tarball/master | tar -xz
sudo mv *servicewrapper*/service /usr/local/share/elasticsearch/bin/
sudo rm -Rf *servicewrapper*
sudo /usr/local/share/elasticsearch/bin/service/elasticsearch install
sudo ln -s `readlink -f /usr/local/share/elasticsearch/bin/service/elasticsearch` /usr/local/bin/rcelasticsearch

Make sure /etc/elasticsearch/elasticsearch.yml has the following config options enabled if you're only developing on a single node for now:

cluster.name: "MY_CLUSTER_NAME"
node.local: true

Start the Elasticsearch service.

sudo service elasticsearch start

Verify it's working.

curl http://localhost:9200

If you see something like this then you're good.

{
  "status" : 200,
  "name" : "Chi Demon",
  "version" : {
    "number" : "1.1.2",
    "build_hash" : "e511f7b28b77c4d99175905fac65bffbf4c80cf7",
    "build_timestamp" : "2014-05-22T12:27:39Z",
    "build_snapshot" : false,
    "lucene_version" : "4.7"
  },
  "tagline" : "You Know, for Search"
}

Now install the Elasticsearch plugins so it can play with MongoDB.

bin/plugin --install com.github.richardwilly98.elasticsearch/elasticsearch-river-mongodb/1.6.0
bin/plugin --install elasticsearch/elasticsearch-mapper-attachments/1.6.0

These two plugins aren't necessary but they're good for testing queries and visualizing changes to your indexes.

bin/plugin --install mobz/elasticsearch-head
bin/plugin --install lukas-vlcek/bigdesk

Restart Elasticsearch.

sudo service elasticsearch restart

Finally index a collection from MongoDB.

curl -XPUT localhost:9200/_river/DATABASE_NAME/_meta -d '{
  "type": "mongodb",
  "mongodb": {
    "servers": [
      { "host": "127.0.0.1", "port": 27017 }
    ],
    "db": "DATABASE_NAME",
    "collection": "ACTUAL_COLLECTION_NAME",
    "options": { "secondary_read_preference": true },
    "gridfs": false
  },
  "index": {
    "name": "ARBITRARY INDEX NAME",
    "type": "ARBITRARY TYPE NAME"
  }
}'

Check that your index is in Elasticsearch

curl -XGET http://localhost:9200/_aliases

Check your cluster health.

curl -XGET 'http://localhost:9200/_cluster/health?pretty=true'

It's probably yellow with some unassigned shards. We have to tell Elasticsearch what we want to work with.

curl -XPUT 'localhost:9200/_settings' -d '{ "index" : { "number_of_replicas" : 0 } }'

Check cluster health again. It should be green now.

curl -XGET 'http://localhost:9200/_cluster/health?pretty=true'

Go play.

This error occures when you try to refer to a null object instance. I can`t tell you what causes this error by your given information, but you can debug it easily in your IDE. I strongly recommend you that use exception handling to avoid unexpected program behavior.

make the image float: left; and the text float: right;

Take a look at this fiddle I used a picture online but you can just swap it out for your picture.

As for "Why not use int or unsigned int?", simply because it's semantically more meaningful not to. There's the practical reason that it can be, say, typedefd as an int and then upgraded to a long later, without anyone having to change their code, of course, but more fundamentally than that a type is supposed to be meaningful. To vastly simplify, a variable of type size_t is suitable for, and used for, containing the sizes of things, just like time_t is suitable for containing time values. How these are actually implemented should quite properly be the implementation's job. Compared to just calling everything int, using meaningful typenames like this helps clarify the meaning and intent of your program, just like any rich set of types does.

 public static int countChars(String input,char find){      
            if(input.indexOf(find) != -1){          
            return  countChars(input.substring(0, input.indexOf(find)), find)+ 
                countChars(input.substring(input.indexOf(find)+1),find) + 1;
            }
            else {
                return 0;
            }

        }

I've used gFTP for that.

In my case, on top of adding google() in repositories for the project level gradle file, I had to also include it in the app level gradle file.

repositories {
    mavenLocal()
    google()
    flatDir {
        dirs 'libs'
    }
}

This is better way as it gives you result in a single line:

$this->db->query("Your query")->row()->campaign_id;

Just put two inputs inside a div with class form-group and set display flex on the div style

<form method="post">
<div class="form-group" style="display: flex;"><input type="text" class="form-control" name="nome" placeholder="Nome e sobrenome" style="margin-right: 4px;" /><input type="text" class="form-control" style="margin-left: 4px;" name="cpf" placeholder="CPF" /></div>
<div class="form-group" style="display: flex;"><input type="email" class="form-control" name="email" placeholder="Email" style="margin-right: 4px;" /><input type="tel" class="form-control" style="margin-left: 4px;" name="telephone" placeholder="Telefone" /></div>
<div class="form-group"><input type="password" class="form-control" name="password" placeholder="Password" /></div>
<div class="form-group"><input type="password" class="form-control" name="password-repeat" placeholder="Password (repeat)" /></div>
<div class="form-group">
    <div class="form-check"><label class="form-check-label"><input type="checkbox" class="form-check-input" />I agree to the license terms.</label></div>
</div>
<div class="form-group"><button class="btn btn-primary btn-block" type="submit">Sign Up</button></div><a class="already" href="#">You already have an account? Login here.</a></form>

try on linux:

sudo apt install python-pip python-bluez libbluetooth-dev libboost-python-dev libboost-thread-dev libglib2.0-dev bluez bluez-hcidump

Better option is use SQLQuery#addScalar than casting to Long or BigDecimal.

Here is modified query that returns count column as Long

Query query = session
             .createSQLQuery("SELECT COUNT(*) as count
                             FROM SpyPath 
                             WHERE DATE(time)>=DATE_SUB(CURDATE(),INTERVAL 6 DAY) 
                             GROUP BY DATE(time) 
                             ORDER BY time;")
             .addScalar("count", LongType.INSTANCE);

Then

List<Long> result = query.list(); //No ClassCastException here  

Related link

• Hibernate javadocs
• Scalar queries
• Hibernate.LONG, remember it has been deprecated since Hibernate version 3.6.X
  here is the deprecated document, so you have to use LongType.INSTANCE
• My previous answer

Pure Lua uses only what is in ANSI standard C. Luiz Figuereido's lposix module contains much of what you need to do more systemsy things.

I had this problem only on Chrome.

I tried adding

var $ =jQuery.noConflict();

just before calling

$(document).ready(function () {

It worked.

Thanks a lot

The Dr. Memory (http://drmemory.org) tool comes with a system call tracing tool called drstrace that lists all system calls made by a target application along with their arguments: http://drmemory.org/strace_for_windows.html

For programmatically enforcing system call policies, you could use the same underlying engines as drstrace: the DynamoRIO tool platform (http://dynamorio.org) and the DrSyscall system call monitoring library (http://drmemory.org/docs/page_drsyscall.html). These use dynamic binary translation technology, which does incur some overhead (20%-30% in steady state, but much higher when running new code such as launching a big desktop app), which may or may not be suitable for your purposes.

This setup solved following issues for me:

• The training controller is not called twice when updating the url from .../ to .../123
• The training controller is not getting invoked again when navigating to another state

State configuration

state('training', {
    abstract: true,
    url: '/training',
    templateUrl: 'partials/training.html',
    controller: 'TrainingController'
}).
state('training.edit', {
    url: '/:trainingId'
}).
state('training.new', {
    url: '/{trainingId}',
    // Optional Parameter
    params: {
        trainingId: null
    }
})

Invoking the states (from any other controller)

$scope.editTraining = function (training) {
    $state.go('training.edit', { trainingId: training.id });
};

$scope.newTraining = function () {
    $state.go('training.new', { });
};

Training Controller

var newTraining;

if (!!!$state.params.trainingId) {

    // new      

    newTraining = // create new training ...

    // Update the URL without reloading the controller
    $state.go('training.edit',
        {
            trainingId : newTraining.id
        },
        {
            location: 'replace', //  update url and replace
            inherit: false,
            notify: false
        });     

} else {

    // edit

    // load existing training ...
}   

I had a user control which sat on page in a free form way, not constrained by another container, and the contents within the user control would not auto size but expand to the full size of what the user control was handed.

To get the user control to simply size to its content, for height only, I placed it into a grid with on row set to auto size such as this:

<Grid Margin="0,60,10,200">
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto" />
    </Grid.RowDefinitions>
    <controls1:HelpPanel x:Name="HelpInfoPanel"
                         Visibility="Visible"
                         Width="570"
                         HorizontalAlignment="Right"
                         ItemsSource="{Binding HelpItems}"
                         Background="#FF313131" />
</Grid>

Upgrade to React Native 0.58.5 or higher version. They have includeSubdomain in their config files in RN 0.58.5.

ChangeLog

In Rn 0.58.5 they have declared network_security_config with their server domain. Network security configuration allows an app to permit cleartext traffic from a certain domain. So no need to put extra effort by declaring android:usesCleartextTraffic="true" in the application tag of your manifest file. It will be resolved automatically after upgrading the RN Version.

Using print function without parentheses works with older versions of Python but is no longer supported on Python3, so you have to put the arguments inside parentheses. However, there are workarounds, as mentioned in the answers to this question. Since the support for Python2 has ended in Jan 1st 2020, the answer has been modified to be compatible with Python3.

You could do any of these (and there may be other ways):

(1)  print("First number is {} and second number is {}".format(first, second))
(1b) print("First number is {first} and number is {second}".format(first=first, second=second)) 

or

(2) print('First number is', first, 'second number is', second) 

(Note: A space will be automatically added afterwards when separated from a comma)

or

(3) print('First number %d and second number is %d' % (first, second))

or

(4) print('First number is ' + str(first) + ' second number is' + str(second))
  

Using format() (1/1b) is preferred where available.

Mac Cmd+Shift+\

• Mac with french keyboard : Ctrl+Cmd+Option+Shift+L

Windows Ctrl+Shift+\

• Windows with spanish keyboard Ctrl+Shift+|

• Windows with german keyboard Ctrl+Shift+^

Alternatively, you can do:

Ctrl+Shift+p

And select

Preferences: Open Keyboard Shortcuts

There you will be able to see all the shortcuts, and create your own.

The short answer is no. You can play a bit, if you want:

You can always do something like this:

private enum Base
{
    A,
    B,
    C
}

private enum Consume
{
    A = Base.A,
    B = Base.B,
    C = Base.C,
    D,
    E
}

But, it doesn't work all that great because Base.A != Consume.A

You can always do something like this, though:

public static class Extensions
{
    public static T As<T>(this Consume c) where T : struct
    {
        return (T)System.Enum.Parse(typeof(T), c.ToString(), false);
    }
}

In order to cross between Base and Consume...

You could also cast the values of the enums as ints, and compare them as ints instead of enum, but that kind of sucks too.

The extension method return should type cast it type T.

No point repeating the other answers, but please note that strdup() can do anything it wants from a C perspective, since it is not part of any C standard. It is however defined by POSIX.1-2001.

Use the Database menu and "Set Datasource Location" menu option to change the name or location of each table in a report.

This works for changing the location of a database, changing to a new database, and changing the location or name of an individual table being used in your report.

To change the datasource connection, go the Database menu and click Set Datasource Location.

1. Change the Datasource Connection:
   1. From the Current Data Source list (the top box), click once on the datasource connection that you want to change.
   2. In the Replace with list (the bottom box), click once on the new datasource connection.
   3. Click Update.
2. Change Individual Tables:
   4. From the Current Data Source list (the top box), expand the datasource connection that you want to change.
   5. Find the table for which you want to update the location or name.
   6. In the Replace with list (the bottom box), expand the new datasource connection.
   7. Find the new table you want to update to point to.
   8. Click Update.
   9. Note that if the table name has changed, the old table name will still appear in the Field Explorer even though it is now using the new table. (You can confirm this be looking at the Table Name of the table's properties in Current Data Source in Set Datasource Location. Screenshot http://i.imgur.com/gzGYVTZ.png) It's possible to rename the old table name to the new name from the context menu in Database Expert -> Selected Tables.
3. Change Subreports:
   9. Repeat each of the above steps for any subreports you might have embedded in your report.
   10. Close the Set Datasource Location window.
4. Any Commands or SQL Expressions:
   11. Go to the Database menu and click Database Expert.
   12. If the report designer used "Add Command" to write custom SQL it will be shown in the Selected Tables box on the right.
   13. Right click that command and choose "Edit Command".
   14. Check if that SQL is specifying a specific database. If so you might need to change it.
   15. Close the Database Expert window.
   16. In the Field Explorer pane on the right, right click any SQL Expressions.
   17. Check if the SQL Expressions are specifying a specific database. If so you might need to change it also.
   18. Save and close your Formula Editor window when you're done editing.

And try running the report again.

The key is to change the datasource connection first, then any tables you need to update, then the other stuff. The connection won't automatically change the tables underneath. Those tables are like goslings that've imprinted on the first large goose-like animal they see. They'll continue to bypass all reason and logic and go to where they've always gone unless you specifically manually change them.

To make it more convenient, here's a tip: You can "Show SQL Query" in the Database menu, and you'll see table names qualified with the database (like "Sales"."dbo"."Customers") for any tables that go straight to a specific database. That might make the hunting easier if you have a lot of stuff going on. When I tackled this problem I had to change each and every table to point to the new table in the new database.

Your return function is in line of def function(main function), you must give one tab to it. And Use

%%debug 

instead of

%debug 

to debug the whole cell not only line. Hope, maybe this will help you.

Without adding additional dependencies, this works. You don't need Volley for this. This works using the current version of Kotlin as of Dec 2018: Kotlin 1.3.10

If using Android Studio, you'll need to add this declaration in your AndroidManifest.xml:

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

You should manually declare imports here. The auto-import tool caused me many conflicts.:

import android.os.AsyncTask
import java.io.BufferedReader
import java.io.InputStreamReader
import java.io.OutputStream
import java.io.OutputStreamWriter
import java.net.URL
import java.net.URLEncoder
import javax.net.ssl.HttpsURLConnection

You can't perform network requests on a background thread. You must subclass AsyncTask.

To call the method:

NetworkTask().execute(requestURL, queryString)

Declaration:

private class NetworkTask : AsyncTask<String, Int, Long>() {
    override fun doInBackground(vararg parts: String): Long? {
        val requestURL = parts.first()
        val queryString = parts.last()

        // Set up request
        val connection: HttpsURLConnection = URL(requestURL).openConnection() as HttpsURLConnection
        // Default is GET so you must override this for post
        connection.requestMethod = "POST"
        // To send a post body, output must be true
        connection.doOutput = true
        // Create the stream
        val outputStream: OutputStream = connection.outputStream
        // Create a writer container to pass the output over the stream
        val outputWriter = OutputStreamWriter(outputStream)
        // Add the string to the writer container
        outputWriter.write(queryString)
        // Send the data
        outputWriter.flush()

        // Create an input stream to read the response
        val inputStream = BufferedReader(InputStreamReader(connection.inputStream)).use {
            // Container for input stream data
            val response = StringBuffer()
            var inputLine = it.readLine()
            // Add each line to the response container
            while (inputLine != null) {
                response.append(inputLine)
                inputLine = it.readLine()
            }
            it.close()
            // TODO: Add main thread callback to parse response
            println(">>>> Response: $response")
        }
        connection.disconnect()

        return 0
    }

    protected fun onProgressUpdate(vararg progress: Int) {
    }

    override fun onPostExecute(result: Long?) {
    }
}

Take these two scenarios:

Optional<Foo> opt = ...
Foo x = opt.orElse( new Foo() );
Foo y = opt.orElseGet( Foo::new );

If opt doesn't contain a value, the two are indeed equivalent. But if opt does contain a value, how many Foo objects will be created?

P.s.: of course in this example the difference probably wouldn't be measurable, but if you have to obtain your default value from a remote web service for example, or from a database, it suddenly becomes very important.

You need to use passive mode.

If you're using linux client, use pftp or ftp -p.

From man ftp:

-p    Use passive mode for data transfers. Allows use of ftp in environments where a firewall prevents connections from the outside world back to the client machine. Requires that the ftp server support the PASV command. This is the default if invoked as pftp.

[string[]]$recipients = $address.Split('; ',[System.StringSplitOptions]::RemoveEmptyEntries)

Is this statement a thing of the past?

Yes. Don't use SELECT *; it's a maintenance nightmare. There are tons of other threads on SO about why this construct is bad, and how avoiding it will help you write better queries.

See also:

• What is the reason not to use select *?
• Performance issue in using SELECT *?
• Why is using '*' to build a view bad?

double randDouble()
{
  double out;
  out = (double)rand()/(RAND_MAX + 1); //each iteration produces a number in [0, 1)
  out = (rand() + out)/RAND_MAX;
  out = (rand() + out)/RAND_MAX;
  out = (rand() + out)/RAND_MAX;
  out = (rand() + out)/RAND_MAX;
  out = (rand() + out)/RAND_MAX;

  return out;
}

Not quite as fast as double X=((double)rand()/(double)RAND_MAX);, but with better distribution. That algorithm gives only RAND_MAX evenly spaced choice of return values; this one gives RANDMAX^6, so its distribution is limited only by the precision of double.

If you want a long double just add a few iterations. If you want a number in [0, 1] rather than [0, 1) just make line 4 read out = (double)rand()/(RAND_MAX);.

Your code doesn't seem so ugly to me...
however, an alternative (not much better) could be e.g. :

df <- data.frame(table(yn))
colnames(df) <- c('Smoker','Freq')
df$Perc <- df$Freq / sum(df$Freq) * 100

------------------
  Smoker Freq Perc
1     No   19 47.5
2    Yes   21 52.5

.NET 4.0 has a built-in library to do this:

using System.Web.Script.Serialization;
JavaScriptSerializer jss = new JavaScriptSerializer();
var d = jss.Deserialize<dynamic>(str);

This is the simplest way.

My task was kill everything matching regexp that is placed in specific directory (after selenium tests not everything got stop). This worked for me:

for i in `ps aux | egrep "firefox|chrome|selenium|opera"|grep "/home/dir1/dir2"|awk '{print $2}'|uniq`; do kill $i; done

How do you run a program all by itself without an operating system running?

You place your binary code to a place where processor looks for after rebooting (e.g. address 0 on ARM).

Can you create assembly programs that the computer can load and run at startup ( e.g. boot the computer from a flash drive and it runs the program that is on the drive)?

General answer to the question: it can be done. It's often referred to as "bare metal programming". To read from flash drive, you want to know what's USB, and you want to have some driver to work with this USB. The program on this drive would also have to be in some particular format, on some particular filesystem... This is something that boot loaders usually do, but your program could include its own bootloader so it's self-contained, if the firmware will only load a small block of code.

Many ARM boards let you do some of those things. Some have boot loaders to help you with basic setup.

Here you may find a great tutorial on how to do a basic operating system on a Raspberry Pi.

Edit: This article, and the whole wiki.osdev.org will anwer most of your questions http://wiki.osdev.org/Introduction

Also, if you don't want to experiment directly on hardware, you can run it as a virtual machine using hypervisors like qemu. See how to run "hello world" directly on virtualized ARM hardware here.

This also works for me

>>> val_int = int(a)
>>> val_fract = a - val_int

It's a bug or whatever but the removePersistentDomainForName is not working while clearing all the NSUserDefaults values.

So, better option is that to reset the PersistentDomain and that you can do via following way:

NSUserDefaults.standardUserDefaults().setPersistentDomain(["":""], forName: NSBundle.mainBundle().bundleIdentifier!)

This is the easiest way in my opinion:

RaisedButton(
  child: Text("PRESS BUTTON"),
  onPressed: booleanCondition
    ? () => myTapCallback()
    : null
)

As was already pointed out in the comment, the MAC address can be received via the WifiManager.

WifiManager manager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
WifiInfo info = manager.getConnectionInfo();
String address = info.getMacAddress();

Also do not forget to add the appropriate permissions into your AndroidManifest.xml

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

Please refer to Android 6.0 Changes.

To provide users with greater data protection, starting in this release, Android removes programmatic access to the device’s local hardware identifier for apps using the Wi-Fi and Bluetooth APIs. The WifiInfo.getMacAddress() and the BluetoothAdapter.getAddress() methods now return a constant value of 02:00:00:00:00:00.

To access the hardware identifiers of nearby external devices via Bluetooth and Wi-Fi scans, your app must now have the ACCESS_FINE_LOCATION or ACCESS_COARSE_LOCATION permissions.

Project->maven->Update Project->tick all checkboxes expect offline and error is solved soon.

You can find the answers here Arch Wiki

For Linux: First of all you have to enable Clipboard in your vim version by installing gvim.

Next you have to put this line on your .vimrc file.

set clipboard=unnamedplus

You can also use the java.util.Scanner class.

private static void readFileWithScanner() {
    File file = new File("path/to/your/file/file.txt");

    Scanner scan = null;

    try {
        scan = new Scanner(file);

        while (scan.hasNextLine()) {
            String line = scan.nextLine();
            String[] lineArray = line.split(",");
            // do something with lineArray, such as instantiate an object
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } finally {
        scan.close();
    }
}

Do this:

$csvData = file_get_contents($fileName);
$lines = explode(PHP_EOL, $csvData);
$array = array();
foreach ($lines as $line) {
    $array[] = str_getcsv($line);
}
print_r($array);

It will give you an output like this:

Array
(
    [0] => Array
        (
            [0] => 12345
            [1] => Computers
            [2] => Acer
            [3] => 4
            [4] => Varta
            [5] => 5.93
            [6] => 1
            [7] => 0.04
            [8] => 27-05-2013
        )

    [1] => Array
        (
            [0] => 12346
            [1] => Computers
            [2] => Acer
            [3] => 5
            [4] => Decra
            [5] => 5.94
            [6] => 1
            [7] => 0.04
            [8] => 27-05-2013
        )

)

I hope this can be of some help.

I know this is an old thread, but thought I may add on a little extra. In my case I was wanting to pass on the text, val and some other data attr. In this case its better to store the whole option as a prev value rather than just the val.

Example code below:

var $sel = $('your select');
$sel.data("prevSel", $sel.clone());
$sel.on('change', function () {
    //grab previous select
    var prevSel = $(this).data("prevSel");

    //do what you want with the previous select
    var prevVal = prevSel.val();
    var prevText = prevSel.text();
    alert("option value - " + prevVal + " option text - " + prevText)

    //reset prev val        
    $(this).data("prevSel", $(this).clone());
});

EDIT:

I forgot to add .clone() onto the element. in not doing so when you try to pull back the values you end up pulling in the new copy of the select rather than the previous. Using the clone() method stores a copy of the select instead of an instance of it.

You can do it in a single line

var res = listA.Where(n => !listB.Contains(n));

This is not the fastest way to do it: in case listB is relatively long, this should be faster:

var setB = new HashSet(listB);
var res = listA.Where(n => !setB.Contains(n));

It's straight forward to use fork/execl to run cp to do the work for you. This has advantages over system in that it is not prone to a Bobby Tables attack and you don't need to sanitize the arguments to the same degree. Further, since system() requires you to cobble together the command argument, you are not likely to have a buffer overflow issue due to sloppy sprintf() checking.

The advantage to calling cp directly instead of writing it is not having to worry about elements of the target path existing in the destination. Doing that in roll-you-own code is error-prone and tedious.

I wrote this example in ANSI C and only stubbed out the barest error handling, other than that it's straight forward code.

void copy(char *source, char *dest)
{
    int childExitStatus;
    pid_t pid;
    int status;
    if (!source || !dest) {
        /* handle as you wish */
    }

    pid = fork();

    if (pid == 0) { /* child */
        execl("/bin/cp", "/bin/cp", source, dest, (char *)0);
    }
    else if (pid < 0) {
        /* error - couldn't start process - you decide how to handle */
    }
    else {
        /* parent - wait for child - this has all error handling, you
         * could just call wait() as long as you are only expecting to
         * have one child process at a time.
         */
        pid_t ws = waitpid( pid, &childExitStatus, WNOHANG);
        if (ws == -1)
        { /* error - handle as you wish */
        }

        if( WIFEXITED(childExitStatus)) /* exit code in childExitStatus */
        {
            status = WEXITSTATUS(childExitStatus); /* zero is normal exit */
            /* handle non-zero as you wish */
        }
        else if (WIFSIGNALED(childExitStatus)) /* killed */
        {
        }
        else if (WIFSTOPPED(childExitStatus)) /* stopped */
        {
        }
    }
}

In Sql Server

You can do this using cross apply

Select
  ColumnA,
  ColumnB,
  c.calccolumn1 As calccolumn1,
  c.calccolumn1 / ColumnC As calccolumn2
from t42
cross apply (select (ColumnA + ColumnB) as calccolumn1) as c

Take a look at the .classpath file in your project, which probably contains most of the information that you want. The easiest option may be to roll your own "build.xml export", i.e. process .classpath into a new build.xml during the build itself, and then call it with an ant subtask.

Parsing a little XML sounds much easier to me than to hook into Eclipse JDT.

What Harry S says is exactly right, but

int? accom = (accomStr == "noval" ? null : (int?)Convert.ToInt32(accomStr));

would also do the trick. (We Resharper users can always spot each other in crowds...)

Use the new CSS filter property.

Supported by webkit browsers, Firefox 34+ and Edge.

You can use this polyfill that will support FF < 34, IE6+.

You would use it like so:

/* Use -webkit- only if supporting: Chrome < 54, iOS < 9.3, Android < 4.4.4 */_x000D_
_x000D_
.shadow {_x000D_
  -webkit-filter: drop-shadow( 3px 3px 2px rgba(0, 0, 0, .7));_x000D_
  filter: drop-shadow( 3px 3px 2px rgba(0, 0, 0, .7));_x000D_
  /* Similar syntax to box-shadow */_x000D_
}

<img src="https://upload.wikimedia.org/wikipedia/commons/c/ce/Star_wars2.svg" alt="" class="shadow" width="200">_x000D_
_x000D_
<!-- Or -->_x000D_
_x000D_
<svg class="shadow" ...>_x000D_
    <rect x="10" y="10" width="200" height="100" fill="#bada55" />_x000D_
</svg>

This approach differs from the box-shadow effect in that it accounts for opacity and does not apply the drop shadow effect to the box but rather to the corners of the svg element itself.

Please Note: This approach only works when the class is placed on the <svg> element alone. You can NOT use this on an inline svg element such as <rect>.

<!-- This will NOT work! -->
<svg><rect class="shadow" ... /></svg>

Read more about css filters on html5rocks.

No, you cannot currently get location without using GPS or internet.

Location techniques based on WiFi, Cellular, or Bluetooth work with the help of a large database that is constantly being updated. A device scans for transmitter IDs and then sends these in a query through the internet to a service such as Google, Apple, or Skyhook. That service responds with a location based on previous wireless surveys from known locations. Without internet access, you have to have a local copy of such a database and keep this up to date. For global usage, this is very impractical.

Theoretically, a mobile provider could provide local data service only but no access to the internet, and then answer location queries from mobile devices. Mobile providers don't do this; no one wants to pay for this kind of restricted data access. If you have data service through your mobile provider, then you have internet access.

In short, using LocationManager.NETWORK_PROVIDER or android.hardware.location.network to get location requires use of the internet.

Using the last known position requires you to have had GPS or internet access very recently. If you just had internet, presumably you can adjust your position or settings to get internet again. If your device has not had GPS or internet access, the last known position feature will not help you.

Without GPS or internet, you could:

1. Take pictures of the night sky and use the current time to estimate your location based on a star chart. This would probably require additional equipment to ensure that the angles for your pictures are correctly measured.
2. Use an accelerometer to track location starting from a known position. The accumulation of error in this kind of approach makes it impractical for most situations.

You can always create a new Eclipse workspace. The Eclipse.exe -clean option is not sufficient in some cases, for example, if the local history becomes a problem.

Edit:

Eclipse is mostly a collection of third party plugins. And each of those plugins can add some extra useful, useless or problematic information to the central Eclipse workspace meta-data folder.

The problem is that not every plugin participates during the user-issued cleanup routine. Therefore, I'd say that it is a problem in the system design of Eclipse, that it allows plugins to misbehave like this.

And therefore, I'd recommend to make yourself comfortable with the idea of using multiple workspaces and linking-in external project entities into each workspace. Because, this is the only workaround for the given system design, to handle faulty plugins that spam your workspace.

If you want to remove newly added contents and files which are already staged (so added to the index) then you use:

git reset --hard

If you want to remove also your latest commit (is the one with the message "blah") then better to use:

git reset --hard HEAD^

To remove the untracked files (so new files not yet added to the index) and folders use:

git clean --force -d

Besides the usual recommendation:

1. Drop index for bulk insert.
2. Batch inserts/updates in large transactions.
3. Tune your buffer cache/disable journal /w PRAGMAs.
4. Use a 64bit machine (to be able to use lots of cache™).
5. [added July 2014] Use common table expression (CTE) instead of running multiple SQL queries! Requires SQLite release 3.8.3.

I have learnt the following from my experience with SQLite3:

1. For maximum insert speed, don't use schema with any column constraint. (Alter table later as needed You can't add constraints with ALTER TABLE).
2. Optimize your schema to store what you need. Sometimes this means breaking down tables and/or even compressing/transforming your data before inserting to the database. A great example is to storing IP addresses as (long) integers.
3. One table per db file - to minimize lock contention. (Use ATTACH DATABASE if you want to have a single connection object.
4. SQLite can store different types of data in the same column (dynamic typing), use that to your advantage.

Question/comment welcome. ;-)

If you are using PHP, just use the addslashes() function.

PHP Manual addslashes

There is no automatic addition of app.config file when you add a class library project to your solution.

To my knowledge, there is no counter indication about doing so manualy. I think this is a common usage.

About log4Net config, you don't have to put the config into app.config, you can have a dedicated conf file in your project as well as an app.config file at the same time.

this link http://logging.apache.org/log4net/release/manual/configuration.html will give you examples about both ways (section in app.config and standalone log4net conf file)

In programming context you can execute SET command (SET classpath=c:\java) or Right click on your computer > properties > advanced > environment variables.

In a batch file you can use

SET classpath=c:\java
java c:\myapplication.class

Simple way is using location.origin
it will return your domain
ex
http://localhost:8000
https://yourdomain.com

then concat with some string...
Enjoy...

<img src={ location.origin+"/images/robot.svg"} alt="robot"/>

More images ?

var images =[
"img1.jpg",
"img2.png",
"img3.jpg",
]

images.map( (image,index) => (

  <img key={index} 
       src={ location.origin+"/images/"+image} 
       alt="robot"
  />
) )

Use document.title:

console.log(document.title)

<title>Title test</title>

MDN Web Docs

If you want to keep the innerHTML of the element and only strip the outermost tag, you can do this:

$(".contentToStrip").each(function(){
  $(this).replaceWith($(this).html());
});

$files = array_diff(scandir($dir,SCANDIR_SORT_DESCENDING), array('..', '.'));
print_r($files);

Check chart.Boxplot from package PerformanceAnalytics. It lets you define the symbol to use for the mean of the distribution.

By default, the chart.Boxplot(data) command adds the mean as a red circle and the median as a black line.

Here is the output with sample data; MWE:

#install.packages(PerformanceAnalytics)    
library(PerformanceAnalytics)
chart.Boxplot(cars$speed)

You can create enums to deal with errors :)

enum RikhError: Error {
    case unknownError
    case connectionError
    case invalidCredentials
    case invalidRequest
    case notFound
    case invalidResponse
    case serverError
    case serverUnavailable
    case timeOut
    case unsuppotedURL
 }

and then create a method inside enum to receive the http response code and return the corresponding error in return :)

static func checkErrorCode(_ errorCode: Int) -> RikhError {
        switch errorCode {
        case 400:
            return .invalidRequest
        case 401:
            return .invalidCredentials
        case 404:
            return .notFound
        //bla bla bla
        default:
            return .unknownError
        }
    }

Finally update your failure block to accept single parameter of type RikhError :)

I have a detailed tutorial on how to restructure traditional Objective - C based Object Oriented network model to modern Protocol Oriented model using Swift3 here https://learnwithmehere.blogspot.in Have a look :)

Hope it helps :)

Although the code isn't perfectly semantic, I think it's more straightforward to have what I call a "clearing div" at the bottom of every container with floats in it. In fact, I've included the following style rule in my reset block for every project:

.clear 
{
   clear: both;
}

If you're styling for IE6 (god help you), you might want to give this rule a 0px line-height and height as well.

Download json from java2s website then include in your project. In your class add these package java_basic;

import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.Iterator;

import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;

you can use this code .may be solve the problem

Intent intent = new Intent(Intent.ACTION_VIEW,Uri.parse("http://192.168.43.1:6789/mobile_base/test.apk"));
startActivity(intent);

char c = 'a';
String a = Integer.toHexString(c); // gives you---> a = "61"

first, create a class to hold your parameters:

public class PkRk {
    public int pk { get; set; }
    public int rk { get; set; }
}

then, use the Html.Action passing the parameters:

Html.Action("PkRkAction", new { pkrk = new PkRk { pk=400, rk=500} })

and use in Controller:

public ActionResult PkRkAction(PkRk pkrk) {
    return PartialView(pkrk);
}

Example.

var request = require('request');

var url = "http://localhost:3000";

var requestData = {
    ...
} 

var data = {
    url: url,
    json: true,
    body: JSON.stringify(requestData)
}

request.post(data, function(error, httpResponse, body){
    console.log(body);
});

As inserting json: true option, sets body to JSON representation of value and adds "Content-type": "application/json" header. Additionally, parses the response body as JSON. LINK

You don't need to skip the iteration, since the rest of it is in the else statement, it will only be executed if the condition is not true.

But if you really need to skip it, you can use the continue; statement.

First of all, the stack pointer points to the bottom of the stack since x86 stacks build from high address values to lower address values. The stack pointer is the point where the next call to push (or call) will place the next value. It's operation is equivalent to the C/C++ statement:

 // push eax
 --*esp = eax
 // pop eax
 eax = *esp++;

 // a function call, in this case, the caller must clean up the function parameters
 move eax,some value
 push eax
 call some address  // this pushes the next value of the instruction pointer onto the
                    // stack and changes the instruction pointer to "some address"
 add esp,4 // remove eax from the stack

 // a function
 push ebp // save the old stack frame
 move ebp, esp
 ... // do stuff
 pop ebp  // restore the old stack frame
 ret

The base pointer is top of the current frame. ebp generally points to your return address. ebp+4 points to the first parameter of your function (or the this value of a class method). ebp-4 points to the first local variable of your function, usually the old value of ebp so you can restore the prior frame pointer.

Enums are classes and should follow the conventions for classes. Instances of an enum are constants and should follow the conventions for constants. So

enum Fruit {APPLE, ORANGE, BANANA, PEAR};

There is no reason for writing FruitEnum any more than FruitClass. You are just wasting four (or five) characters that add no information.

Java itself recommends this approach and it is used in their examples.

How about:

(sleep 5; echo "Hello World") &

I prefer to use something like this:

int? var1 = ds.Tables[0].Rows[0].Field<int?>("ColumnName");

or

int? var1 = ds.Tables[0].Rows[0].Field<int?>(3);   //column index

READY TO USE FUNCTION (using Promise)

/**
 * Select file(s).
 * @param {String} contentType The content type of files you wish to select. For instance "image/*" to select all kinds of images.
 * @param {Boolean} multiple Indicates if the user can select multiples file.
 * @returns {Promise<File|File[]>} A promise of a file or array of files in case the multiple parameter is true.
 */
function (contentType, multiple){
    return new Promise(resolve => {
        let input = document.createElement('input');
        input.type = 'file';
        input.multiple = multiple;
        input.accept = contentType;

        input.onchange = _ => {
            let files = Array.from(input.files);
            if (multiple)
                resolve(files);
            else
                resolve(files[0]);
        };

        input.click();
    });
}

TEST IT

// Content wrapper element_x000D_
let contentElement = document.getElementById("content");_x000D_
_x000D_
// Button callback_x000D_
async function onButtonClicked(){_x000D_
    let files = await selectFile("image/*", true);_x000D_
    contentElement.innerHTML = files.map(file => `<img src="${URL.createObjectURL(file)}" style="width: 100px; height: 100px;">`).join('');_x000D_
}_x000D_
_x000D_
// ---- function definition ----_x000D_
function selectFile (contentType, multiple){_x000D_
    return new Promise(resolve => {_x000D_
        let input = document.createElement('input');_x000D_
        input.type = 'file';_x000D_
        input.multiple = multiple;_x000D_
        input.accept = contentType;_x000D_
_x000D_
        input.onchange = _ => {_x000D_
            let files = Array.from(input.files);_x000D_
            if (multiple)_x000D_
                resolve(files);_x000D_
            else_x000D_
                resolve(files[0]);_x000D_
        };_x000D_
_x000D_
        input.click();_x000D_
    });_x000D_
}

<button onclick="onButtonClicked()">Select images</button>_x000D_
<div id="content"></div>

You can chain class selectors without a space between them:

.a.b {
     color: #666;
}

Note that, if it matters to you, IE6 treats .a.b as .b, so in that browser both div.a.b and div.b will have gray text. See this answer for a comparison between proper browsers and IE6.

Try:

#content{ background-color:#F3F3F3; margin:auto;width:70%;height:77%;}
#footer{width:100%;background-color:#666666;height:22%;}

(77% and 22% roughly preserves the proportions of content and footer and should not cause scrolling)

After clicking on Properties of any installer(.exe) which block your application to install (Windows Defender SmartScreen prevented an unrecognized app ) for that issue i found one solution

1. Right click on installer(.exe)
2. Select properties option.
3. Click on checkbox to check Unblock at the bottom of Properties.

This solution work for Heroku CLI (heroku-x64) installer(.exe)

To run wget command in PHP you have to do following steps :

1) Allow apache server to use wget command by adding it in sudoers list.

2) Check "exec" function enabled or exist in your PHP config.

3) Run "exec" command as root user i.e. sudo user

Below code sample as per ubuntu machine

#Add apache in sudoers list to use wget command
~$ sudo nano /etc/sudoers
#add below line in the sudoers file
www-data ALL=(ALL) NOPASSWD: /usr/bin/wget


##Now in PHP file run wget command as 
exec("/usr/bin/sudo wget -P PATH_WHERE_WANT_TO_PLACE_FILE URL_OF_FILE");

Use a BackgroundWorker. It will allow you to get callbacks on completion and allow you to track progress. You can set the Result value on the event arguments to the resulting value.

    public void UseBackgroundWorker()
    {
        var worker = new BackgroundWorker();
        worker.DoWork += DoWork;
        worker.RunWorkerCompleted += WorkDone;
        worker.RunWorkerAsync("input");
    }

    public void DoWork(object sender, DoWorkEventArgs e)
    {
        e.Result = e.Argument.Equals("input");
        Thread.Sleep(1000);
    }

    public void WorkDone(object sender, RunWorkerCompletedEventArgs e)
    {
        var result = (bool) e.Result;
    }

How I load Icons: Using Visual Studio 2010: Go to the project properties, click Add Resource > Existing File, select your Icon.

You'll see that a Resources folder appeared. This was my problem, I had to click the loaded icon (in Resources directory), and set "Copy to Output Directory" to "Copy always". (was set "Do not copy").

Now simply do:

Icon myIcon = new Icon("Resources/myIcon.ico");

After you write to the MemoryStream and before you read it back, you need to Seek back to the beginning of the MemoryStream so you're not reading from the end.

UPDATE

After seeing your update, I think there's a more reliable way to build the stream:

UnicodeEncoding uniEncoding = new UnicodeEncoding();
String message = "Message";

// You might not want to use the outer using statement that I have
// I wasn't sure how long you would need the MemoryStream object    
using(MemoryStream ms = new MemoryStream())
{
    var sw = new StreamWriter(ms, uniEncoding);
    try
    {
        sw.Write(message);
        sw.Flush();//otherwise you are risking empty stream
        ms.Seek(0, SeekOrigin.Begin);

        // Test and work with the stream here. 
        // If you need to start back at the beginning, be sure to Seek again.
    }
    finally
    {
        sw.Dispose();
    }
}

As you can see, this code uses a StreamWriter to write the entire string (with proper encoding) out to the MemoryStream. This takes the hassle out of ensuring the entire byte array for the string is written.

Update: I stepped into issue with empty stream several time. It's enough to call Flush right after you've finished writing.

Finally got the correct thing

echo "Hello, world!" | tr -d '\n' | xxd -ps -c 200

Use the :checked selector to determine the checkbox's state:

$('input[type=checkbox]').click(function() {
    if($(this).is(':checked')) {
        ...
    } else {
        ...
    }
});

Structure in C

First you need to declare your structure:

struct mystruct{
 char element_1,
 char element_2
};

Instantiate C structure

Once you declared your structure , you can instantiate a variable that has as type your structure using either:

mystruct struct_example;

or :

mystruct* struct_example;

For the first use case you can access the varaiable eleemnet using the following syntax: struct_example.element_1 = 5;

For the second use case which is having a pointer to variable of type your structure, to be able to access the variable structure you need an arrow:

struct_example->element_1 = 5;

This is how to pass the struct by reference. This means that your function can access the struct outside of the function and modify its values. You do this by passing a pointer to the structure to the function.

#include <stdio.h>
/* card structure definition */
struct card
{
    int face; // define pointer face
}; // end structure card

typedef struct card Card ;

/* prototype */
void passByReference(Card *c) ;

int main(void)
{
    Card c ;
    c.face = 1 ;
    Card *cptr = &c ; // pointer to Card c

    printf("The value of c before function passing = %d\n", c.face);
    printf("The value of cptr before function = %d\n",cptr->face);

    passByReference(cptr);

    printf("The value of c after function passing = %d\n", c.face);

    return 0 ; // successfully ran program
}

void passByReference(Card *c)
{
    c->face = 4;
}

This is how you pass the struct by value so that your function receives a copy of the struct and cannot access the exterior structure to modify it. By exterior I mean outside the function.

#include <stdio.h>


/* global card structure definition */
struct card
{
    int face ; // define pointer face
};// end structure card

typedef struct card Card ;

/* function prototypes */
void passByValue(Card c);

int main(void)
{
    Card c ;
    c.face = 1;

    printf("c.face before passByValue() = %d\n", c.face);

    passByValue(c);

    printf("c.face after passByValue() = %d\n",c.face);
    printf("As you can see the value of c did not change\n");
    printf("\nand the Card c inside the function has been destroyed"
        "\n(no longer in memory)");
}


void passByValue(Card c)
{
    c.face = 5;
}

You can also use simply exit().

Keep in mind that sys.exit(), exit(), quit(), and os._exit(0) kill the Python interpreter. Therefore, if it appears in a script called from another script by execfile(), it stops execution of both scripts.

See "Stop execution of a script called with execfile" to avoid this.

I like to use the "Line" control. It gives you exact control over where the separator starts and ends. Although it isn't exactly a separator, it functions is the same way, especially in a StackPanel.

The line control works within a grid too. I prefer to use the StackPanel because you don't have to worry about different controls overlapping.

<StackPanel Orientation="Horizontal">
    <Button Content="Button 1" Height="20" Width="70"/>
    <Line X1="0" X2="0" Y1="0" Y2="20" Stroke="Black" StrokeThickness="0.5" Margin="5,0,10,0"/>
    <Button Content="Button 2" Height="20" Width="70"/>
</StackPanel>

X1 = x starting position (should be 0 for a vertical line)

X2 = x ending position (X1 = X2 for a vertical line)

Y1 = y starting position (should be 0 for a vertical line)

Y2 = y ending position (Y2 = desired line height)

I use "margin" to add padding on any side of the vertical line. In this instance, there are 5 pixels on the left and 10 pixels on the right of the vertical line.

Since the line control lets you pick the x and y coordinates of the start and end of the line, you can also use it for horizontal lines and lines at any angle in between.

You can use outline with outline offset

<div class="double-border"></div>
.double-border{
background-color:#ccc;
outline: 1px solid #f00;
outline-offset: 3px;
}

Few people appear, despite the many answers to this question, to have pointed out that dictionaries are un-ordered mappings, and so (until the blessing of insertion order with Python 3.7) the idea of the "first" entry in a dictionary literally made no sense. And even an OrderedDict can only be accessed by numerical index using such uglinesses as mydict[mydict.keys()[0]] (Python 2 only, since in Python 3 keys() is a non-subscriptable iterator.)

From 3.7 onwards and in practice in 3,6 as well - the new behaviour was introduced then, but not included as part of the language specification until 3.7 - iteration over the keys, values or items of a dict (and, I believe, a set also) will yield the least-recently inserted objects first. There is still no simple way to access them by numerical index of insertion.

As to the question of selecting and "formatting" items, if you know the key you want to retrieve in the dictionary you would normally use the key as a subscript to retrieve it (my_var = mydict['Apple']).

If you really do want to be able to index the items by entry number (ignoring the fact that a particular entry's number will change as insertions are made) then the appropriate structure would probably be a list of two-element tuples. Instead of

mydict = {
  'Apple': {'American':'16', 'Mexican':10, 'Chinese':5},
  'Grapes':{'Arabian':'25','Indian':'20'} }

you might use:

mylist = [
    ('Apple', {'American':'16', 'Mexican':10, 'Chinese':5}),
    ('Grapes', {'Arabian': '25', 'Indian': '20'}
]

Under this regime the first entry is mylist[0] in classic list-endexed form, and its value is ('Apple', {'American':'16', 'Mexican':10, 'Chinese':5}). You could iterate over the whole list as follows:

for (key, value) in mylist:  # unpacks to avoid tuple indexing
    if key == 'Apple':
        if 'American' in value:
            print(value['American'])

but if you know you are looking for the key "Apple", why wouldn't you just use a dict instead?

You could introduce an additional level of indirection by cacheing the list of keys, but the complexities of keeping two data structures in synchronisation would inevitably add to the complexity of your code.

A small note on try/finally: The finally will always execute unless

• System.exit() is called.
• The JVM crashes.
• The try{} block never ends (e.g. endless loop).

Just to complement Mr @potatosalad answer.

You don't actually need to access the function scope to get the result on the onload callback, you can freely do the following on the event parameter:

var arrayBuffer;
var fileReader = new FileReader();
fileReader.onload = function(event) {
    arrayBuffer = event.target.result;
};
fileReader.readAsArrayBuffer(blob);

Why this is better? Because then we may use arrow function without losing the context

var fileReader = new FileReader();
fileReader.onload = (event) => {
    this.externalScopeVariable = event.target.result;
};
fileReader.readAsArrayBuffer(blob);

If you use ng > 1.2, here is an example of using ng-repeat-start/end without generating unnecessary tags:

<html>_x000D_
  <head>_x000D_
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>_x000D_
    <script>_x000D_
      angular.module('mApp', []);_x000D_
    </script>_x000D_
  </head>_x000D_
  <body ng-app="mApp">_x000D_
    <table border="1" width="100%">_x000D_
      <tr ng-if="0" ng-repeat-start="elem in [{k: 'A', v: ['a1','a2']}, {k: 'B', v: ['b1']}, {k: 'C', v: ['c1','c2','c3']}]"></tr>_x000D_
_x000D_
      <tr>_x000D_
        <td rowspan="{{elem.v.length}}">{{elem.k}}</td>_x000D_
        <td>{{elem.v[0]}}</td>_x000D_
      </tr>_x000D_
      <tr ng-repeat="v in elem.v" ng-if="!$first">_x000D_
        <td>{{v}}</td>_x000D_
      </tr>_x000D_
_x000D_
      <tr ng-if="0" ng-repeat-end></tr>_x000D_
    </table>_x000D_
  </body>_x000D_
</html>

The important point: for tags used for ng-repeat-start and ng-repeat-end set ng-if="0", to let not be inserted in the page. In this way the inner content will be handled exactly as it is in knockoutjs (using commands in <!--...-->), and there will be no garbage.

you can use ? at the end to skip one "\"

regex("\\\\?")

You can do it with CSS only by creating your menu twice. It's not ideal but it gives you the opportunity have a different design for the menu once it's on top and you'll have nothing else than CSS, no jquery. Here is an example with DIV (you can of course change it to NAV if you prefer):

<div id="hiddenmenu">
 THIS IS MY HIDDEN MENU
</div>
<div id="header">
 Here is my header with a lot of text and my main menu
</div>
<div id="body">
 MY BODY
</div>

And then have the following CSS:

#hiddenmenu {
position: fixed;
top: 0;
z-index:1;
 }
#header {
top: 0;
position:absolute;
z-index:2;
 }
#body {
padding-top: 80px;
position:absolute;
z-index: auto;
 }

Here is a fiddle for you to see: https://jsfiddle.net/brghtk4z/1/

I'm not sure if this is viable or not - but if you can't break the frame, why not just display a warning. For example, If your page isn't the "top page" create a setInterval method that tries to break the frame. If after 3 or 4 tries your page still isn't the top page - create a div element that covers the whole page (modal box) with a message and a link like...

You are viewing this page in a unauthorized frame window - (Blah blah... potential security issue)

click this link to fix this problem

Not the best, but I don't see any way they could script their way out of that.

Supposing your content is inside a string named mystring...

You can use:

@Html.Raw(mystring)

Alternatively you can convert your string to HtmlString or any other type that implements IHtmlString in model or directly inline and use regular @:

@{ var myHtmlString = new HtmlString(mystring);}
@myHtmlString

May be it's good if you define your background-image in the :after pseudo class. Write like this:

.parent{
    width:300px;
    height:300px;
    position:relative;
    border:1px solid red;
}
.parent:after{
    content:'';
    background:url('http://www.dummyimage.com/300x300/000/fff&text=parent+image');
    width:300px;
    height:300px;
    position:absolute;
    top:0;
    left:0;
    opacity:0.5;
}
.child{
    background:yellow;
    position:relative;
    z-index:1;
}

Check this fiddle

Not sure exactly what you try to denote with that syntax, but in almost all RDBMS-es you can use a subquery in the FROM clause (sometimes called an "inline-view"):

SELECT..
FROM (
     SELECT ...
     FROM ...
     ) my_select
WHERE ...

In advanced "enterprise" RDBMS-es (like oracle, SQL Server, postgresql) you can use common table expressions which allows you to refer to a query by name and reuse it even multiple times:

-- Define the CTE expression name and column list.
WITH Sales_CTE (SalesPersonID, SalesOrderID, SalesYear)
AS
-- Define the CTE query.
(
    SELECT SalesPersonID, SalesOrderID, YEAR(OrderDate) AS SalesYear
    FROM Sales.SalesOrderHeader
    WHERE SalesPersonID IS NOT NULL
)
-- Define the outer query referencing the CTE name.
SELECT SalesPersonID, COUNT(SalesOrderID) AS TotalSales, SalesYear
FROM Sales_CTE
GROUP BY SalesYear, SalesPersonID
ORDER BY SalesPersonID, SalesYear;

(example from http://msdn.microsoft.com/en-us/library/ms190766(v=sql.105).aspx)

for char in my_string:
    if not char.isalnum():
        my_string = my_string.replace(char,"")

It should be in %USERNAME%. Obviously this can be easily spoofed, so don't rely on it for security.

Useful tip: type set in a command prompt will list all environment variables.

PART I: How To Log In

We'll assume you already know how to build a login+password HTML form which POSTs the values to a script on the server side for authentication. The sections below will deal with patterns for sound practical auth, and how to avoid the most common security pitfalls.

To HTTPS or not to HTTPS?

Unless the connection is already secure (that is, tunneled through HTTPS using SSL/TLS), your login form values will be sent in cleartext, which allows anyone eavesdropping on the line between browser and web server will be able to read logins as they pass through. This type of wiretapping is done routinely by governments, but in general, we won't address 'owned' wires other than to say this: Just use HTTPS.

In essence, the only practical way to protect against wiretapping/packet sniffing during login is by using HTTPS or another certificate-based encryption scheme (for example, TLS) or a proven & tested challenge-response scheme (for example, the Diffie-Hellman-based SRP). Any other method can be easily circumvented by an eavesdropping attacker.

Of course, if you are willing to get a little bit impractical, you could also employ some form of two-factor authentication scheme (e.g. the Google Authenticator app, a physical 'cold war style' codebook, or an RSA key generator dongle). If applied correctly, this could work even with an unsecured connection, but it's hard to imagine that a dev would be willing to implement two-factor auth but not SSL.

(Do not) Roll-your-own JavaScript encryption/hashing

Given the perceived (though now avoidable) cost and technical difficulty of setting up an SSL certificate on your website, some developers are tempted to roll their own in-browser hashing or encryption schemes in order to avoid passing cleartext logins over an unsecured wire.

While this is a noble thought, it is essentially useless (and can be a security flaw) unless it is combined with one of the above - that is, either securing the line with strong encryption or using a tried-and-tested challenge-response mechanism (if you don't know what that is, just know that it is one of the most difficult to prove, most difficult to design, and most difficult to implement concepts in digital security).

While it is true that hashing the password can be effective against password disclosure, it is vulnerable to replay attacks, Man-In-The-Middle attacks / hijackings (if an attacker can inject a few bytes into your unsecured HTML page before it reaches your browser, they can simply comment out the hashing in the JavaScript), or brute-force attacks (since you are handing the attacker both username, salt and hashed password).

CAPTCHAS against humanity

CAPTCHA is meant to thwart one specific category of attack: automated dictionary/brute force trial-and-error with no human operator. There is no doubt that this is a real threat, however, there are ways of dealing with it seamlessly that don't require a CAPTCHA, specifically properly designed server-side login throttling schemes - we'll discuss those later.

Know that CAPTCHA implementations are not created alike; they often aren't human-solvable, most of them are actually ineffective against bots, all of them are ineffective against cheap third-world labor (according to OWASP, the current sweatshop rate is $12 per 500 tests), and some implementations may be technically illegal in some countries (see OWASP Authentication Cheat Sheet). If you must use a CAPTCHA, use Google's reCAPTCHA, since it is OCR-hard by definition (since it uses already OCR-misclassified book scans) and tries very hard to be user-friendly.

Personally, I tend to find CAPTCHAS annoying, and use them only as a last resort when a user has failed to log in a number of times and throttling delays are maxed out. This will happen rarely enough to be acceptable, and it strengthens the system as a whole.

Storing Passwords / Verifying logins

This may finally be common knowledge after all the highly-publicized hacks and user data leaks we've seen in recent years, but it has to be said: Do not store passwords in cleartext in your database. User databases are routinely hacked, leaked or gleaned through SQL injection, and if you are storing raw, plaintext passwords, that is instant game over for your login security.

So if you can't store the password, how do you check that the login+password combination POSTed from the login form is correct? The answer is hashing using a key derivation function. Whenever a new user is created or a password is changed, you take the password and run it through a KDF, such as Argon2, bcrypt, scrypt or PBKDF2, turning the cleartext password ("correcthorsebatterystaple") into a long, random-looking string, which is a lot safer to store in your database. To verify a login, you run the same hash function on the entered password, this time passing in the salt and compare the resulting hash string to the value stored in your database. Argon2, bcrypt and scrypt store the salt with the hash already. Check out this article on sec.stackexchange for more detailed information.

The reason a salt is used is that hashing in itself is not sufficient -- you'll want to add a so-called 'salt' to protect the hash against rainbow tables. A salt effectively prevents two passwords that exactly match from being stored as the same hash value, preventing the whole database being scanned in one run if an attacker is executing a password guessing attack.

A cryptographic hash should not be used for password storage because user-selected passwords are not strong enough (i.e. do not usually contain enough entropy) and a password guessing attack could be completed in a relatively short time by an attacker with access to the hashes. This is why KDFs are used - these effectively "stretch the key", which means that every password guess an attacker makes causes multiple repetitions of the hash algorithm, for example 10,000 times, which causes the attacker to guess the password 10,000 times slower.

Session data - "You are logged in as Spiderman69"

Once the server has verified the login and password against your user database and found a match, the system needs a way to remember that the browser has been authenticated. This fact should only ever be stored server side in the session data.

If you are unfamiliar with session data, here's how it works: A single randomly-generated string is stored in an expiring cookie and used to reference a collection of data - the session data - which is stored on the server. If you are using an MVC framework, this is undoubtedly handled already.

If at all possible, make sure the session cookie has the secure and HTTP Only flags set when sent to the browser. The HttpOnly flag provides some protection against the cookie being read through XSS attack. The secure flag ensures that the cookie is only sent back via HTTPS, and therefore protects against network sniffing attacks. The value of the cookie should not be predictable. Where a cookie referencing a non-existent session is presented, its value should be replaced immediately to prevent session fixation.

Session state can also be maintained on the client side. This is achieved by using techniques like JWT (JSON Web Token).

PART II: How To Remain Logged In - The Infamous "Remember Me" Checkbox

Persistent Login Cookies ("remember me" functionality) are a danger zone; on the one hand, they are entirely as safe as conventional logins when users understand how to handle them; and on the other hand, they are an enormous security risk in the hands of careless users, who may use them on public computers and forget to log out, and who may not know what browser cookies are or how to delete them.

Personally, I like persistent logins for the websites I visit on a regular basis, but I know how to handle them safely. If you are positive that your users know the same, you can use persistent logins with a clean conscience. If not - well, then you may subscribe to the philosophy that users who are careless with their login credentials brought it upon themselves if they get hacked. It's not like we go to our user's houses and tear off all those facepalm-inducing Post-It notes with passwords they have lined up on the edge of their monitors, either.

Of course, some systems can't afford to have any accounts hacked; for such systems, there is no way you can justify having persistent logins.

If you DO decide to implement persistent login cookies, this is how you do it:

1. First, take some time to read Paragon Initiative's article on the subject. You'll need to get a bunch of elements right, and the article does a great job of explaining each.

2. And just to reiterate one of the most common pitfalls, DO NOT STORE THE PERSISTENT LOGIN COOKIE (TOKEN) IN YOUR DATABASE, ONLY A HASH OF IT! The login token is Password Equivalent, so if an attacker got their hands on your database, they could use the tokens to log in to any account, just as if they were cleartext login-password combinations. Therefore, use hashing (according to https://security.stackexchange.com/a/63438/5002 a weak hash will do just fine for this purpose) when storing persistent login tokens.

PART III: Using Secret Questions

Don't implement 'secret questions'. The 'secret questions' feature is a security anti-pattern. Read the paper from link number 4 from the MUST-READ list. You can ask Sarah Palin about that one, after her Yahoo! email account got hacked during a previous presidential campaign because the answer to her security question was... "Wasilla High School"!

Even with user-specified questions, it is highly likely that most users will choose either:

• A 'standard' secret question like mother's maiden name or favorite pet

• A simple piece of trivia that anyone could lift from their blog, LinkedIn profile, or similar

• Any question that is easier to answer than guessing their password. Which, for any decent password, is every question you can imagine

In conclusion, security questions are inherently insecure in virtually all their forms and variations, and should not be employed in an authentication scheme for any reason.

The true reason why security questions even exist in the wild is that they conveniently save the cost of a few support calls from users who can't access their email to get to a reactivation code. This at the expense of security and Sarah Palin's reputation. Worth it? Probably not.

PART IV: Forgotten Password Functionality

I already mentioned why you should never use security questions for handling forgotten/lost user passwords; it also goes without saying that you should never e-mail users their actual passwords. There are at least two more all-too-common pitfalls to avoid in this field:

1. Don't reset a forgotten password to an autogenerated strong password - such passwords are notoriously hard to remember, which means the user must either change it or write it down - say, on a bright yellow Post-It on the edge of their monitor. Instead of setting a new password, just let users pick a new one right away - which is what they want to do anyway. (An exception to this might be if the users are universally using a password manager to store/manage passwords that would normally be impossible to remember without writing it down).

2. Always hash the lost password code/token in the database. AGAIN, this code is another example of a Password Equivalent, so it MUST be hashed in case an attacker got their hands on your database. When a lost password code is requested, send the plaintext code to the user's email address, then hash it, save the hash in your database -- and throw away the original. Just like a password or a persistent login token.

A final note: always make sure your interface for entering the 'lost password code' is at least as secure as your login form itself, or an attacker will simply use this to gain access instead. Making sure you generate very long 'lost password codes' (for example, 16 case-sensitive alphanumeric characters) is a good start, but consider adding the same throttling scheme that you do for the login form itself.

PART V: Checking Password Strength

First, you'll want to read this small article for a reality check: The 500 most common passwords

Okay, so maybe the list isn't the canonical list of most common passwords on any system anywhere ever, but it's a good indication of how poorly people will choose their passwords when there is no enforced policy in place. Plus, the list looks frighteningly close to home when you compare it to publicly available analyses of recently stolen passwords.

So: With no minimum password strength requirements, 2% of users use one of the top 20 most common passwords. Meaning: if an attacker gets just 20 attempts, 1 in 50 accounts on your website will be crackable.

Thwarting this requires calculating the entropy of a password and then applying a threshold. The National Institute of Standards and Technology (NIST) Special Publication 800-63 has a set of very good suggestions. That, when combined with a dictionary and keyboard layout analysis (for example, 'qwertyuiop' is a bad password), can reject 99% of all poorly selected passwords at a level of 18 bits of entropy. Simply calculating password strength and showing a visual strength meter to a user is good, but insufficient. Unless it is enforced, a lot of users will most likely ignore it.

And for a refreshing take on user-friendliness of high-entropy passwords, Randall Munroe's Password Strength xkcd is highly recommended.

Utilize Troy Hunt's Have I Been Pwned API to check users passwords against passwords compromised in public data breaches.

PART VI: Much More - Or: Preventing Rapid-Fire Login Attempts

First, have a look at the numbers: Password Recovery Speeds - How long will your password stand up

If you don't have the time to look through the tables in that link, here's the list of them:

1. It takes virtually no time to crack a weak password, even if you're cracking it with an abacus

2. It takes virtually no time to crack an alphanumeric 9-character password if it is case insensitive

3. It takes virtually no time to crack an intricate, symbols-and-letters-and-numbers, upper-and-lowercase password if it is less than 8 characters long (a desktop PC can search the entire keyspace up to 7 characters in a matter of days or even hours)

4. It would, however, take an inordinate amount of time to crack even a 6-character password, if you were limited to one attempt per second!

So what can we learn from these numbers? Well, lots, but we can focus on the most important part: the fact that preventing large numbers of rapid-fire successive login attempts (ie. the brute force attack) really isn't that difficult. But preventing it right isn't as easy as it seems.

Generally speaking, you have three choices that are all effective against brute-force attacks (and dictionary attacks, but since you are already employing a strong passwords policy, they shouldn't be an issue):

• Present a CAPTCHA after N failed attempts (annoying as hell and often ineffective -- but I'm repeating myself here)

• Locking accounts and requiring email verification after N failed attempts (this is a DoS attack waiting to happen)

• And finally, login throttling: that is, setting a time delay between attempts after N failed attempts (yes, DoS attacks are still possible, but at least they are far less likely and a lot more complicated to pull off).

Best practice #1: A short time delay that increases with the number of failed attempts, like:

• 1 failed attempt = no delay
• 2 failed attempts = 2 sec delay
• 3 failed attempts = 4 sec delay
• 4 failed attempts = 8 sec delay
• 5 failed attempts = 16 sec delay
• etc.

DoS attacking this scheme would be very impractical, since the resulting lockout time is slightly larger than the sum of the previous lockout times.

To clarify: The delay is not a delay before returning the response to the browser. It is more like a timeout or refractory period during which login attempts to a specific account or from a specific IP address will not be accepted or evaluated at all. That is, correct credentials will not return in a successful login, and incorrect credentials will not trigger a delay increase.

Best practice #2: A medium length time delay that goes into effect after N failed attempts, like:

• 1-4 failed attempts = no delay
• 5 failed attempts = 15-30 min delay

DoS attacking this scheme would be quite impractical, but certainly doable. Also, it might be relevant to note that such a long delay can be very annoying for a legitimate user. Forgetful users will dislike you.

Best practice #3: Combining the two approaches - either a fixed, short time delay that goes into effect after N failed attempts, like:

• 1-4 failed attempts = no delay
• 5+ failed attempts = 20 sec delay

Or, an increasing delay with a fixed upper bound, like:

• 1 failed attempt = 5 sec delay
• 2 failed attempts = 15 sec delay
• 3+ failed attempts = 45 sec delay

This final scheme was taken from the OWASP best-practices suggestions (link 1 from the MUST-READ list) and should be considered best practice, even if it is admittedly on the restrictive side.

As a rule of thumb, however, I would say: the stronger your password policy is, the less you have to bug users with delays. If you require strong (case-sensitive alphanumerics + required numbers and symbols) 9+ character passwords, you could give the users 2-4 non-delayed password attempts before activating the throttling.

DoS attacking this final login throttling scheme would be very impractical. And as a final touch, always allow persistent (cookie) logins (and/or a CAPTCHA-verified login form) to pass through, so legitimate users won't even be delayed while the attack is in progress. That way, the very impractical DoS attack becomes an extremely impractical attack.

Additionally, it makes sense to do more aggressive throttling on admin accounts, since those are the most attractive entry points

PART VII: Distributed Brute Force Attacks

Just as an aside, more advanced attackers will try to circumvent login throttling by 'spreading their activities':

• Distributing the attempts on a botnet to prevent IP address flagging

• Rather than picking one user and trying the 50.000 most common passwords (which they can't, because of our throttling), they will pick THE most common password and try it against 50.000 users instead. That way, not only do they get around maximum-attempts measures like CAPTCHAs and login throttling, their chance of success increases as well, since the number 1 most common password is far more likely than number 49.995

• Spacing the login requests for each user account, say, 30 seconds apart, to sneak under the radar

Here, the best practice would be logging the number of failed logins, system-wide, and using a running average of your site's bad-login frequency as the basis for an upper limit that you then impose on all users.

Too abstract? Let me rephrase:

Say your site has had an average of 120 bad logins per day over the past 3 months. Using that (running average), your system might set the global limit to 3 times that -- ie. 360 failed attempts over a 24 hour period. Then, if the total number of failed attempts across all accounts exceeds that number within one day (or even better, monitor the rate of acceleration and trigger on a calculated threshold), it activates system-wide login throttling - meaning short delays for ALL users (still, with the exception of cookie logins and/or backup CAPTCHA logins).

I also posted a question with more details and a really good discussion of how to avoid tricky pitfals in fending off distributed brute force attacks

PART VIII: Two-Factor Authentication and Authentication Providers

Credentials can be compromised, whether by exploits, passwords being written down and lost, laptops with keys being stolen, or users entering logins into phishing sites. Logins can be further protected with two-factor authentication, which uses out-of-band factors such as single-use codes received from a phone call, SMS message, app, or dongle. Several providers offer two-factor authentication services.

Authentication can be completely delegated to a single-sign-on service, where another provider handles collecting credentials. This pushes the problem to a trusted third party. Google and Twitter both provide standards-based SSO services, while Facebook provides a similar proprietary solution.

MUST-READ LINKS About Web Authentication

1. OWASP Guide To Authentication / OWASP Authentication Cheat Sheet
2. Dos and Don’ts of Client Authentication on the Web (very readable MIT research paper)
3. Wikipedia: HTTP cookie
4. Personal knowledge questions for fallback authentication: Security questions in the era of Facebook (very readable Berkeley research paper)

It looks like there is no difference, for uses each underneath.

$ irb
>> for x in nil
>> puts x
>> end
NoMethodError: undefined method `each' for nil:NilClass
    from (irb):1
>> nil.each {|x| puts x}
NoMethodError: undefined method `each' for nil:NilClass
    from (irb):4

Like Bayard says, each is more idiomatic. It hides more from you and doesn't require special language features. Per Telemachus's Comment

for .. in .. sets the iterator outside the scope of the loop, so

for a in [1,2]
  puts a
end

leaves a defined after the loop is finished. Where as each doesn't. Which is another reason in favor of using each, because the temp variable lives a shorter period.

This link goes to the best comparison chart around, directly from the Microsoft. It compares ALL aspects of all MS SQL server editions. To compare three editions you are asking about, just focus on the last three columns of every table in there.

Summary compiled from the above document:

    * = contains the feature
                                           SQLEXPR    SQLEXPRWT   SQLEXPRADV
 ----------------------------------------------------------------------------
    > SQL Server Core                         *           *           *
    > SQL Server Management Studio            -           *           *
    > Distributed Replay – Admin Tool         -           *           *
    > LocalDB                                 -           *           *
    > SQL Server Data Tools (SSDT)            -           -           *
    > Full-text and semantic search           -           -           *
    > Specification of language in query      -           -           *
    > some of Reporting services features     -           -           *

In Access 2013. Drop a "Text Box" control onto your form. On the Property Sheet for the control under the Format tab find the Format property. Set this to one of the date format options. Job's done.

Using RIGHT is a good option but you can also do the following:

SUBSTRING(CAST((POWER(10, N) + value) AS NVARCHAR(N + 1)), 2, N)

where N is the total number of digits you want displayed. So for a 3-digit value with leading zeros (N = 3):

SUBSTRING(CAST((POWER(10, 3) + value) AS NVARCHAR(4)), 2, 3)

or alternately

SUBSTRING(CAST(1000 + value) AS NVARCHAR(4)), 2, 3)

What this is doing is adding the desired value to a power of 10 large enough to generate enough leading zeros, then chopping off the leading 1.

The advantage of this technique is that the result will always be the same length, allowing the use of SUBSTRING instead of RIGHT, which is not available in some query languages (like HQL).

If you are using ASP.NET Core MVC project. This error message can be shown then you have the correct cshtml file in your Views folder but the action is missing in your controller.

Adding the missing action to the controller will fix it.

<table style='border:1px solid black'>
    <tr>
        <td>Derp</td>
    </tr>
</table>

This should work. I use the shorthand syntax for borders.

If you are using ES6 you can:

var sample = [1, 2, 3]

var result = sample.filter(elem => elem !== 2)

/* output */
[1, 3]

Also take notice filter does not update the existing array it will return a new filtered array every time.

Add Custom Font in Swift

1. Drag and drop your font in your project.
2. Double check that it is added in Copy Bundle Resource. (Build Phase -> Copy Bundle Resource).
3. In your plist file add "Font Provided by application" and add your fonts with full name.
4. Now use your font like: myLabel.font = UIFont (name: "GILLSANSCE-ROMAN", size: 20)

From the node.js documentation, "To have a module execute code multiple times, export a function, and call that function", you could use node.js module.export and have a single file to manage the db connections.You can find more at Node.js documentation. Let's say db.js file be like:

    const mysql = require('mysql');

    var connection;

    module.exports = {

    dbConnection: function () {

        connection = mysql.createConnection({
            host: "127.0.0.1",
            user: "Your_user",
            password: "Your_password",
            database: 'Your_bd'
        });
        connection.connect();
        return connection;
    }

    };

Then, the file where you are going to use the connection could be like useDb.js:

const dbConnection = require('./db');

var connection;

function callDb() {

    try {

        connection = dbConnectionManager.dbConnection();

        connection.query('SELECT 1 + 1 AS solution', function (error, results, fields) {
            if (!error) {

                let response = "The solution is: " + results[0].solution;
                console.log(response);

            } else {
                console.log(error);
            }
        });
        connection.end();


    } catch (err) {
        console.log(err);
    }
}

You have use to repeat-y as style="background-repeat:repeat-y;width: 200px;" instead of style="repeat-y".

Try this inside the image tag or you can use the below css for the div

.div_backgrndimg
{
    background-repeat: repeat-y;
    background-image: url("/image/layout/lotus-dreapta.png");
    width:200px;
}

You can use the properties tab in eclipse to set various values.

here are all the possible values

• none
• text
• textCapCharacters
• textCapWords
• textCapSentences
• textAutoCorrect
• textAutoComplete
• textMultiLine
• textImeMultiLine
• textNoSuggestions
• textUri
• textEmailAddress
• textEmailSubject
• textShortMessage
• textLongMessage
• textPersonName
• textPostalAddress
• textPassword
• textVisiblePassword
• textWebEditText
• textFilter
• textPhonetic
• textWebEmailAddress
• textWebPassword
• number
• numberSigned
• numberDecimal
• numberPassword
• phone
• datetime
• date
• time

Check here for explanations: http://developer.android.com/reference/android/widget/TextView.html#attr_android:inputType

You don't need awk for this...

echo aaa0.bbb.ccc | cut -d. -f1
cut -d. -f1 <<< aaa0.bbb.ccc

echo aaa0.bbb.ccc | { IFS=. read a _ ; echo $a ; }
{ IFS=. read a _ ; echo $a ; } <<< aaa0.bbb.ccc 

x=aaa0.bbb.ccc; echo ${x/.*/}

Heavier options:

sed:
echo aaa0.bbb.ccc | sed 's/\..*//'
sed 's/\..*//' <<< aaa0.bbb.ccc 
awk:
echo aaa0.bbb.ccc | awk -F. '{print $1}'
awk -F. '{print $1}' <<< aaa0.bbb.ccc 

If your table columns contains duplicate data and If you directly apply row_ number() and create PARTITION on column, there is chance to have result in duplicated row and with row number value.

To remove duplicate row, you need one more INNER query in from clause which eliminates duplicate rows and then it will give output to it's foremost outer FROM clause where you can apply PARTITION and ROW_NUMBER ().

As like below example:

SELECT DATE, STATUS, TITLE, ROW_NUMBER() OVER (PARTITION BY DATE, STATUS, TITLE ORDER BY QUANTITY ASC) AS Row_Num
FROM (
     SELECT DISTINCT <column names>...
) AS tbl

June 2018 Issue fixed by using a different appcompact version. Use these codes onto your project dependencies...

In build.gradle(Module: app) add this dependency

implementation 'com.android.support:appcompat-v7:28.0.0-alpha1'

Happy Coding... :)

Try this

Select 'ALTER TABLE ' + Table_Name  +'  drop constraint ' + Constraint_Name  from Information_Schema.CONSTRAINT_TABLE_USAGE

Select 'drop Procedure ' + specific_name  from Information_Schema.Routines where specific_name not like 'sp%' AND specific_name not like 'fn_%'

Select 'drop View ' + table_name  from Information_Schema.tables where Table_Type = 'VIEW'

SELECT 'DROP TRIGGER ' + name FROM sysobjects WHERE type = 'tr'

Select 'drop table ' + table_name  from Information_Schema.tables where Table_Type = 'BASE TABLE'

I think this should work.

UPDATE QuestionTrackings
SET QuestionID = (SELECT QuestionID
                  FROM AnswerTrackings
                  WHERE AnswerTrackings.AnswerID = QuestionTrackings.AnswerID)
WHERE QuestionID IS NULL
AND AnswerID IS NOT NULL;

I recommend you to use the open-source package guzzle that is fully unit tested and uses the latest coding practices.

Installing Guzzle

Go to the command line in your project folder and type in the following command (assuming you already have the package manager composer installed). If you need help how to install Composer, you should have a look here.

php composer.phar require guzzlehttp/guzzle

Using Guzzle to send a POST request

The usage of Guzzle is very straight forward as it uses a light-weight object-oriented API:

// Initialize Guzzle client
$client = new GuzzleHttp\Client();

// Create a POST request
$response = $client->request(
    'POST',
    'http://example.org/',
    [
        'form_params' => [
            'key1' => 'value1',
            'key2' => 'value2'
        ]
    ]
);

// Parse the response object, e.g. read the headers, body, etc.
$headers = $response->getHeaders();
$body = $response->getBody();

// Output headers and body for debugging purposes
var_dump($headers, $body);

Countercheck if boostrap/cache/config.php database details are correct. That should give you an hint if they are.

If they are not, then you need to clear the cache using the following steps :

1. rm -fr bootstrap/cache/*
2. php artisan optimize

simply "CUT" project folder and move it out of workspace directory and do the following

file=>import=>(select new directory)=> mark (copy to my workspace) checkbox 

and you done !

Also I use Tomcat GUI app (in my case: C:\tomcat\bin\Tomcat9w.bin).

• Go to Java tab:

  

• Set your Java properties, for example:

  Java virtual machine

  C:\Program Files\Java\jre-10.0.2\bin\server\jvm.dll

  Java virtual machine

  C:\tomcat\bin\bootstrap.jar;C:\tomcat\bin\tomcat-juli.jar

  Java Options:

  -Dcatalina.home=C:\tomcat

  -Dcatalina.base=C:\tomcat

  -Djava.io.tmpdir=C:\tomcat\temp

  -Djava.util.logging.config.file=C:\tomcat\conf\logging.properties

  -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=*:8000

  Java 9 options:

  --add-opens=java.base/java.lang=ALL-UNNAMED

  --add-opens=java.base/java.io=ALL-UNNAMED

  --add-opens=java.rmi/sun.rmi.transport=ALL-UNNAMED

Use which(mydata_2$height_chad1 == 2585)

Short example

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

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

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

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

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

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

Just to add to the other answers, the documentation gives this explanation:

• KEY is normally a synonym for INDEX. The key attribute PRIMARY KEY can also be specified as just KEY when given in a column definition. This was implemented for compatibility with other database systems.

• A UNIQUE index creates a constraint such that all values in the index must be distinct. An error occurs if you try to add a new row with a key value that matches an existing row. For all engines, a UNIQUE index permits multiple NULL values for columns that can contain NULL.

• A PRIMARY KEY is a unique index where all key columns must be defined as NOT NULL. If they are not explicitly declared as NOT NULL, MySQL declares them so implicitly (and silently). A table can have only one PRIMARY KEY. The name of a PRIMARY KEY is always PRIMARY, which thus cannot be used as the name for any other kind of index.

For this specific problem, something like this would work:

$ sed 's/^ *//g' < input.txt > output.txt

It says to replace all spaces at the start of a line with nothing. If you also want to remove tabs, change it to this:

$ sed 's/^[ \t]+//g' < input.txt > output.txt

The leading "s" before the / means "substitute". The /'s are the delimiters for the patterns. The data between the first two /'s are the pattern to match, and the data between the second and third / is the data to replace it with. In this case you're replacing it with nothing. The "g" after the final slash means to do it "globally", ie: over the entire file rather than on only the first match it finds.

Finally, instead of < input.txt > output.txt you can use the -i option which means to edit the file "in place". Meaning, you don't need to create a second file to contain your result. If you use this option you will lose your original file.

A SimpleDateFormat, as its name indicates, formats Dates. Not a Calendar. So, if you want to format a GregorianCalendar using a SimpleDateFormat, you must convert the Calendar to a Date first:

dateFormat.format(calendar.getTime());

And what you see printed is the toString() representation of the calendar. It's intended usage is debugging. It's not intended to be used to display a date in a GUI. For that, use a (Simple)DateFormat.

Finally, to convert from a String to a Date, you should also use a (Simple)DateFormat (its parse() method), rather than splitting the String as you're doing. This will give you a Date object, and you can create a Calendar from the Date by instanciating it (Calendar.getInstance()) and setting its time (calendar.setTime()).

My advice would be: Googling is not the solution here. Reading the API documentation is what you need to do.

That way you haven't installed pip, you installed just the easy_install i.e. setuptools.

First you should remove all the packages you installed with easy_install using (see uninstall):

easy_install -m PackageName

This includes pip if you installed it using easy_install pip.

After this you remove the setuptools following the instructions from here:

If setuptools package is found in your global site-packages directory, you may safely remove the following file/directory:

setuptools-*.egg

If setuptools is installed in some other location such as the user site directory (eg: ~/.local, ~/Library/Python or %APPDATA%), then you may safely remove the following files:

pkg_resources.py
easy_install.py
setuptools/
setuptools-*.egg-info/

The following code works for me:

System.exit(home.EXIT_ON_CLOSE);

I know it's not the best solution, but the best practice:

$("#root").append(child);

setTimeout(function(){
  // Action after append
},100);