Programs & Examples On #Bootloader

Operating System as the inspiration

The operating system is also a program, so we can also create our own program by creating from scratch or changing (limiting or adding) features of one of the small operating systems, and then run it during the boot process (using an ISO image).

For example, this page can be used as a starting point:

How to write a simple operating system

Here, the entire Operating System fit entirely in a 512-byte boot sector (MBR)!

Such or similar simple OS can be used to create a simple framework that will allow us:

make the bootloader load subsequent sectors on the disk into RAM, and jump to that point to continue execution. Or you could read up on FAT12, the filesystem used on floppy drives, and implement that.

There are many possibilities, however. For for example to see a bigger x86 assembly language OS we can explore the MykeOS, x86 operating system which is a learning tool to show the simple 16-bit, real-mode OSes work, with well-commented code and extensive documentation.

Boot Loader as the inspiration

Other common type of programs that run without the operating system are also Boot Loaders. We can create a program inspired by such a concept for example using this site:

How to develop your own Boot Loader

The above article presents also the basic architecture of such a programs:

1. Correct loading to the memory by 0000:7C00 address.
2. Calling the BootMain function that is developed in the high-level language.
3. Show “”Hello, world…”, from low-level” message on the display.

As we can see, this architecture is very flexible and allows us to implement any program, not necessarily a boot loader.

In particular, it shows how to use the "mixed code" technique thanks to which it is possible to combine high-level constructions (from C or C++) with low-level commands (from Assembler). This is a very useful method, but we have to remember that:

to build the program and obtain executable file you will need the compiler and linker of Assembler for 16-bit mode. For C/C++ you will need only the compiler that can create object files for 16-bit mode.

The article shows also how to see the created program in action and how to perform its testing and debug.

UEFI applications as the inspiration

The above examples used the fact of loading the sector MBR on the data medium. However, we can go deeper into the depths by plaing for example with the UEFI applications:

Beyond loading an OS, UEFI can run UEFI applications, which reside as files on the EFI System Partition. They can be executed from the UEFI command shell, by the firmware's boot manager, or by other UEFI applications. UEFI applications can be developed and installed independently of the system manufacturer.

A type of UEFI application is an OS loader such as GRUB, rEFInd, Gummiboot, and Windows Boot Manager; which loads an OS file into memory and executes it. Also, an OS loader can provide a user interface to allow the selection of another UEFI application to run. Utilities like the UEFI shell are also UEFI applications.

If we would like to start creating such programs, we can, for example, start with these websites:

Programming for EFI: Creating a "Hello, World" Program / UEFI Programming - First Steps

Exploring security issues as the inspiration

It is well known that there is a whole group of malicious software (which are programs) that are running before the operating system starts.

A huge group of them operate on the MBR sector or UEFI applications, just like the all above solutions, but there are also those that use another entry point such as the Volume Boot Record (VBR) or the BIOS:

There are at least four known BIOS attack viruses, two of which were for demonstration purposes.

or perhaps another one too.

Attacks before system startup

Bootkits have evolved from Proof-of-Concept development to mass distribution and have now effectively become open-source software.

Different ways to boot

I also think that in this context it is also worth mentioning that there are various forms of booting the operating system (or the executable program intended for this). There are many, but I would like to pay attention to loading the code from the network using Network Boot option (PXE), which allows us to run the program on the computer regardless of its operating system and even regardless of any storage medium that is directly connected to the computer:

What Is Network Booting (PXE) and How Can You Use It?

Just to expand a little on Dirk's example:

It helps to think of a data frame as a list with equal length vectors. That's probably why names works with a data frame but not a matrix.

The other useful function is dimnames which returns the names for every dimension. You will notice that the rownames function actually just returns the first element from dimnames.

Regarding rownames and row.names: I can't tell the difference, although rownames uses dimnames while row.names was written outside of R. They both also seem to work with higher dimensional arrays:

>a <- array(1:5, 1:4)
> a[1,,,]
> rownames(a) <- "a"
> row.names(a)
[1] "a"
> a
, , 1, 1    
  [,1] [,2]
a    1    2

> dimnames(a)
[[1]]
[1] "a"

[[2]]
NULL

[[3]]
NULL

[[4]]
NULL

I got this answer from the book Programming iOS 7, section Bar Position and Bar Metrics

If a navigation bar or toolbar — or a search bar (discussed earlier in this chapter) — is to occupy the top of the screen, the iOS 7 convention is that its height should be increased to underlap the transparent status bar. To make this possible, iOS 7 introduces the notion of a bar position.

UIBarPositionTopAttached

Specifies that the bar is at the top of the screen, as well as its containing view. Bars with this position draw their background extended upwards, allowing their background content to show through the status bar. Available in iOS 7.0 and later.

No of directory we can find using below command

ls -l | grep "^d" | wc -l

the aim of balanced tree is to reach the leaf in a minimum of traversal (min height). The degree of the tree is the number of branches minus 1. A Balanced tree may be not Binary.

Sorry, but why not use the following construction:

request.getParameterMap().put(parameterName, new String[] {parameterValue});

The equivalent is:

python3 -m http.server

Hi, This is my example of calculating the difference between two dates

    <!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <script src="https://code.jquery.com/jquery.min.js"></script>
  <title>JS Bin</title>
</head>
<body>
  <br>
<input class='fromdate' type="date"  />
<input class='todate' type="date" />
<div class='calculated' /><br>
<div class='minim' />  
<input class='todate' type="submit" onclick='showDays()' />

</body>
</html>

This is the function that calculates the difference :

function showDays(){

     var start = $('.fromdate').val();
     var end = $('.todate').val();

     var startDay = new Date(start);
     var endDay = new Date(end);
     var millisecondsPerDay = 1000 * 60 * 60 * 24;

     var millisBetween = endDay.getTime() - startDay.getTime();
     var days = millisBetween / millisecondsPerDay;

      // Round down.
       alert( Math.floor(days));

}

I hope I have helped you

Send the following headers before outputting the file:

header("Content-Disposition: attachment; filename=\"" . basename($File) . "\"");
header("Content-Type: application/octet-stream");
header("Content-Length: " . filesize($File));
header("Connection: close");

@grom: Interesting about the 'application/octet-stream' MIME type. I wasn't aware of that, have always just used 'application/force-download' :)

Do you mean Delegate.Invoke/BeginInvoke or Control.Invoke/BeginInvoke?

• Delegate.Invoke: Executes synchronously, on the same thread.
• Delegate.BeginInvoke: Executes asynchronously, on a threadpool thread.
• Control.Invoke: Executes on the UI thread, but calling thread waits for completion before continuing.
• Control.BeginInvoke: Executes on the UI thread, and calling thread doesn't wait for completion.

Tim's answer mentions when you might want to use BeginInvoke - although it was mostly geared towards Delegate.BeginInvoke, I suspect.

For Windows Forms apps, I would suggest that you should usually use BeginInvoke. That way you don't need to worry about deadlock, for example - but you need to understand that the UI may not have been updated by the time you next look at it! In particular, you shouldn't modify data which the UI thread might be about to use for display purposes. For example, if you have a Person with FirstName and LastName properties, and you did:

person.FirstName = "Kevin"; // person is a shared reference
person.LastName = "Spacey";
control.BeginInvoke(UpdateName);
person.FirstName = "Keyser";
person.LastName = "Soze";

Then the UI may well end up displaying "Keyser Spacey". (There's an outside chance it could display "Kevin Soze" but only through the weirdness of the memory model.)

Unless you have this sort of issue, however, Control.BeginInvoke is easier to get right, and will avoid your background thread from having to wait for no good reason. Note that the Windows Forms team has guaranteed that you can use Control.BeginInvoke in a "fire and forget" manner - i.e. without ever calling EndInvoke. This is not true of async calls in general: normally every BeginXXX should have a corresponding EndXXX call, usually in the callback.

I don't know is there any method in Python API.But you can use this simple code to add Salt-and-Pepper noise to an image.

import numpy as np
import random
import cv2

def sp_noise(image,prob):
    '''
    Add salt and pepper noise to image
    prob: Probability of the noise
    '''
    output = np.zeros(image.shape,np.uint8)
    thres = 1 - prob 
    for i in range(image.shape[0]):
        for j in range(image.shape[1]):
            rdn = random.random()
            if rdn < prob:
                output[i][j] = 0
            elif rdn > thres:
                output[i][j] = 255
            else:
                output[i][j] = image[i][j]
    return output

image = cv2.imread('image.jpg',0) # Only for grayscale image
noise_img = sp_noise(image,0.05)
cv2.imwrite('sp_noise.jpg', noise_img)

Explain what video describe to resolve problem

After Changing Password of root (Mysql Account). Accessing to phpmyadmin page will be denied because phpMyAdmin use root/''(blank) as default username/password. To resolve this problem, you need to reconfig phpmyadmin. Edit file config.inc.php in folder %wamp%\apps\phpmyadmin4.1.14 (Not in %wamp%)

$cfg['Servers'][$i]['verbose'] = 'mysql wampserver';
$cfg['Servers'][$i]['auth_type'] = 'config';
$cfg['Servers'][$i]['user'] = 'root';
$cfg['Servers'][$i]['password'] = 'changed';
$cfg['Servers'][$i]['host'] = '127.0.0.1';
$cfg['Servers'][$i]['connect_type'] = 'tcp';
$cfg['Servers'][$i]['compress'] = false;
$cfg['Servers'][$i]['extension'] = 'mysqli';
$cfg['Servers'][$i]['AllowNoPassword'] = false;

If you have more than 1 DB server, add "i++" to file and continue add new config as above

now 2020, i am face to same question, but for this old question, there are so many new answer, just list some of it:

• this is webpack.config.js

plugins: [
        new HtmlWebpackPlugin({
            // 1. title is the parameter, you can use in ejs template
            templateParameters:{
                title: JSON.stringify(someting: 'something'),
            },
        }), 


        //2. BUILT_AT is a parameter too. can use it.
        new webpack.DefinePlugin({
            BUILT_AT: webpack.DefinePlugin.runtimeValue(Date.now,"some"),

        }),

        //3. for webpack5, you can use global variable: __webpack_hash__
        //new webpack.ExtendedAPIPlugin()
    ],
    //4. this is not variable, this is module, so use 'import tt' to use it.
    externals: { 
        'ex_title': JSON.stringify({
            tt: 'eitentitle',
        })
    },

the 4 ways only basic, there are even more ways that i believe. but i think maybe this 4ways is the most simple.

If you are using gradle. You can apply 'aplication' plugin and use the following command

  applicationDefaultJvmArgs = [
             "-Dlog4j.configurationFile=your.xml",
                              ]

Ctrl+H.

Also,

• Open any file quickly without browsing for it in the Package Explorer: Ctrl + Shift + R.

• Open a type (e.g.: a class, an interface) without clicking through interminable list of packages: Ctrl + Shift + T.

• Go directly to a member (method, variable) of a huge class file, especially when a lot of methods are named similarly: Ctrl + O

• Go to line number N in the source file: Ctrl + L, enter line number.

My solution was to switch my Mac keyboard from Unicode to U.S. English.

You should choose access via fields over access via properties. With fields you can limit the data sent and received. With via properties you can send more data as a host, and set G denominations (which factory set most of the properties in total).

You don't have access to the right image as far my knowledge, unless you override the onTouch event. I suggest to use a RelativeLayout, with one editText and one imageView, and set OnClickListener over the image view as below:

<RelativeLayout
        android:id="@+id/rlSearch"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@android:drawable/edit_text"
        android:padding="5dip" >

        <EditText
            android:id="@+id/txtSearch"
            android:layout_width="match_parent"

            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:layout_toLeftOf="@+id/imgSearch"
            android:background="#00000000"
            android:ems="10"/>

        <ImageView
            android:id="@+id/imgSearch"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:layout_centerVertical="true"
            android:src="@drawable/btnsearch" />
    </RelativeLayout>

In case you are using fish shell and do not want to add to $path for security reason. We can add the below function to run local node executables.

### run executables in node_module/.bin directory
function n 
  set -l npmbin (npm bin)   
  set -l argvCount (count $argv)
  switch $argvCount
    case 0
      echo please specify the local node executable as 1st argument
    case 1
      # for one argument, we can eval directly 
      eval $npmbin/$argv
    case '*'
      set --local executable $argv[1]
      # for 2 or more arguments we cannot append directly after the $npmbin/ since the fish will apply each array element after the the start string: $npmbin/arg1 $npmbin/arg2... 
      # This is just how fish interoperate array. 
      set --erase argv[1]
      eval $npmbin/$executable $argv 
  end
end

Now you can run thing like:

n coffee

or more arguments like:

n browser-sync --version

Note, if you are bash user, then @Bob9630 answers is the way to go by leveraging bash's $@, which is not available in fishshell.

As appsthatmatter says, in the layout something like:

<ListView android:id="@+id/listView" ... />
<TextView android:id="@+id/emptyElement" ... />

and in the linked Activity:

this.listView = (ListView) findViewById(R.id.listView);
this.listView.setEmptyView(findViewById(R.id.emptyElement));

Does also work with a GridView...

Replace your "Save" button with an anchor link and set the new download attribute dynamically. Works in Chrome and Firefox:

var d = "ha";
$(this).attr("href", "data:image/png;base64,abcdefghijklmnop").attr("download", "file-" + d + ".png");

Here's a working example with the name set as the current date: http://jsfiddle.net/Qjvb3/

Here a compatibility table for downloadattribute: http://caniuse.com/download

Modify your CSS like this:

.vertical_banner {_x000D_
    border: 1px solid #E9E3DD;_x000D_
    float: left;_x000D_
    height: 210px;_x000D_
    margin: 2px;_x000D_
    padding: 4px 2px 10px 10px;_x000D_
    text-align: left;_x000D_
    width: 117px;_x000D_
    position:relative;_x000D_
}_x000D_
_x000D_
#bottom_link{_x000D_
   position:absolute;                  /* added */_x000D_
   bottom:0;                           /* added */_x000D_
   left:0;                           /* added */_x000D_
}

<div class="vertical_banner">_x000D_
    <div id="bottom_link">_x000D_
         <input type="submit" value="Continue">_x000D_
       </div>_x000D_
</div>

Depending on the Eclipse in question the required WTP packages may be found with different names. For example in Eclipse Luna I found it easiest to search with "Tools" and choose one that mentioned Tools for Java EE development. That added the project facet functionality. Searching with "WTP" wasn't of much help.

As @Heinzi mentioned the character set of the response should be used.

var encoding = response.CharacterSet == ""
    ? Encoding.UTF8
    : Encoding.GetEncoding(response.CharacterSet);

using (var stream = response.GetResponseStream())
{
    var reader = new StreamReader(stream, encoding);
    var responseString = reader.ReadToEnd();
}

Generally speaking:

all and any are functions that take some iterable and return True, if

• in the case of all(), no values in the iterable are falsy;
• in the case of any(), at least one value is truthy.

A value x is falsy iff bool(x) == False. A value x is truthy iff bool(x) == True.

Any non-booleans in the iterable will be fine — bool(x) will coerce any x according to these rules: 0, 0.0, None, [], (), [], set(), and other empty collections will yield False, anything else True. The docstring for bool uses the terms 'true'/'false' for 'truthy'/'falsy', and True/False for the concrete boolean values.

In your specific code samples:

You misunderstood a little bit how these functions work. Hence, the following does something completely not what you thought:

if any(foobars) == big_foobar:

...because any(foobars) would first be evaluated to either True or False, and then that boolean value would be compared to big_foobar, which generally always gives you False (unless big_foobar coincidentally happened to be the same boolean value).

Note: the iterable can be a list, but it can also be a generator/generator expression (˜ lazily evaluated/generated list) or any other iterator.

What you want instead is:

if any(x == big_foobar for x in foobars):

which basically first constructs an iterable that yields a sequence of booleans—for each item in foobars, it compares the item to big_foobar and emits the resulting boolean into the resulting sequence:

tmp = (x == big_foobar for x in foobars)

then any walks over all items in tmp and returns True as soon as it finds the first truthy element. It's as if you did the following:

In [1]: foobars = ['big', 'small', 'medium', 'nice', 'ugly']                                        

In [2]: big_foobar = 'big'                                                                          

In [3]: any(['big' == big_foobar, 'small' == big_foobar, 'medium' == big_foobar, 'nice' == big_foobar, 'ugly' == big_foobar])        
Out[3]: True

Note: As DSM pointed out, any(x == y for x in xs) is equivalent to y in xs but the latter is more readable, quicker to write and runs faster.

Some examples:

In [1]: any(x > 5 for x in range(4))
Out[1]: False

In [2]: all(isinstance(x, int) for x in range(10))
Out[2]: True

In [3]: any(x == 'Erik' for x in ['Erik', 'John', 'Jane', 'Jim'])
Out[3]: True

In [4]: all([True, True, True, False, True])
Out[4]: False

See also: http://docs.python.org/2/library/functions.html#all

What ever data you have inserted into one text file or log file that can put on one path in hdfs and then write a query as follows in hive

  hive>load data inpath<<specify inputpath>> into table <<tablename>>;

EXAMPLE:

hive>create table foo (id int, name string)
row format delimited
fields terminated by '\t' or '|'or ','
stored as text file;
table created..
    DATA INSERTION::
    hive>load data inpath '/home/hive/foodata.log' into table foo;

Probably your simple json.jar file isn't in your classpath.

nodejs domains is the most up to date way of handling errors in nodejs. Domains can capture both error/other events as well as traditionally thrown objects. Domains also provide functionality for handling callbacks with an error passed as the first argument via the intercept method.

As with normal try/catch-style error handling, is is usually best to throw errors when they occur, and block out areas where you want to isolate errors from affecting the rest of the code. The way to "block out" these areas are to call domain.run with a function as a block of isolated code.

In synchronous code, the above is enough - when an error happens you either let it be thrown through, or you catch it and handle there, reverting any data you need to revert.

try {  
  //something
} catch(e) {
  // handle data reversion
  // probably log too
}

When the error happens in an asynchronous callback, you either need to be able to fully handle the rollback of data (shared state, external data like databases, etc). OR you have to set something to indicate that an exception has happened - where ever you care about that flag, you have to wait for the callback to complete.

var err = null;
var d = require('domain').create();
d.on('error', function(e) {
  err = e;
  // any additional error handling
}
d.run(function() { Fiber(function() {
  // do stuff
  var future = somethingAsynchronous();
  // more stuff

  future.wait(); // here we care about the error
  if(err != null) {
    // handle data reversion
    // probably log too
  }

})});

Some of that above code is ugly, but you can create patterns for yourself to make it prettier, eg:

var specialDomain = specialDomain(function() {
  // do stuff
  var future = somethingAsynchronous();
  // more stuff

  future.wait(); // here we care about the error
  if(specialDomain.error()) {
    // handle data reversion
    // probably log too
  } 
}, function() { // "catch"
  // any additional error handling
});

UPDATE (2013-09):

Above, I use a future that implies fibers semantics, which allow you to wait on futures in-line. This actually allows you to use traditional try-catch blocks for everything - which I find to be the best way to go. However, you can't always do this (ie in the browser)...

There are also futures that don't require fibers semantics (which then work with normal, browsery JavaScript). These can be called futures, promises, or deferreds (I'll just refer to futures from here on). Plain-old-JavaScript futures libraries allow errors to be propagated between futures. Only some of these libraries allow any thrown future to be correctly handled, so beware.

An example:

returnsAFuture().then(function() {
  console.log('1')
  return doSomething() // also returns a future

}).then(function() {
  console.log('2')
  throw Error("oops an error was thrown")

}).then(function() {
  console.log('3')

}).catch(function(exception) {
  console.log('handler')
  // handle the exception
}).done()

This mimics a normal try-catch, even though the pieces are asynchronous. It would print:

1
2
handler

Note that it doesn't print '3' because an exception was thrown that interrupts that flow.

Take a look at bluebird promises:

• https://github.com/petkaantonov/bluebird

Note that I haven't found many other libraries other than these that properly handle thrown exceptions. jQuery's deferred, for example, don't - the "fail" handler would never get the exception thrown an a 'then' handler, which in my opinion is a deal breaker.

It’s very simple, it just advertises a string which contains a few characters conforming to Apple’s iBeacon standard. you can refer the Link http://glimwormbeacons.com/learn/what-makes-an-ibeacon-an-ibeacon/

Use it:

function validate_Date($mydate,$format = 'DD-MM-YYYY') {

    if ($format == 'YYYY-MM-DD') list($year, $month, $day) = explode('-', $mydate);
    if ($format == 'YYYY/MM/DD') list($year, $month, $day) = explode('/', $mydate);
    if ($format == 'YYYY.MM.DD') list($year, $month, $day) = explode('.', $mydate);

    if ($format == 'DD-MM-YYYY') list($day, $month, $year) = explode('-', $mydate);
    if ($format == 'DD/MM/YYYY') list($day, $month, $year) = explode('/', $mydate);
    if ($format == 'DD.MM.YYYY') list($day, $month, $year) = explode('.', $mydate);

    if ($format == 'MM-DD-YYYY') list($month, $day, $year) = explode('-', $mydate);
    if ($format == 'MM/DD/YYYY') list($month, $day, $year) = explode('/', $mydate);
    if ($format == 'MM.DD.YYYY') list($month, $day, $year) = explode('.', $mydate);       

    if (is_numeric($year) && is_numeric($month) && is_numeric($day))
        return checkdate($month,$day,$year);
    return false;           
}         

If you have this -

  <style type="text/css">
      .cell {
            float: left;
            width: 100px;
            border: 1px solid;
            line-height: 1em;
      }
  </style>

  <div class="cell">TopLeft</div>
  <div class="cell">TopMiddlePlusSomeOtherTextWhichMakesItToLong</div>
  <div class="cell">TopRight</div>
  <br/>
  <div class="cell">BottomLeft</div>
  <div class="cell">BottomMiddle</div>
  <div class="cell">bottomRight</div>

just switch to a vertical format with containing divs and use min-width in your CSS instead of width -

  <style type="text/css">
      .column {
            float: left;
            min-width: 100px;
      }
      .cell2 {
            border: 1px solid;
            line-height: 1em;
      }
  </style>

  <div class="column">
      <div class="cell2">TopLeft</div>
      <div class="cell2">BottomLeft</div>
  </div>
  <div class="column">
      <div class="cell2">TopMiddlePlusSomeOtherTextWhichMakesItToLong</div>
      <div class="cell2">BottomMiddle</div>
  </div>
  <div class="column">
      <div class="cell2">TopRight</div>
      <div class="cell2">bottomRight</div>
  </div>
  <br/>

Of course, if you are displaying genuine tabular data it is ok to use a real table as it is semantically correct and will inform people using screen readers that is supposed to be in a table. It is using them for general layout or image-slicing that people will lynch you for.

All of the examples here (with the exception of rockacola's) require that the user physically click on the window to define focus. This isn't ideal, so .hover() is the better choice:

$(window).hover(function(event) {
    if (event.fromElement) {
        console.log("inactive");
    } else {
        console.log("active");
    }
});

This'll tell you when the user has their mouse on the screen, though it still won't tell you if it's in the foreground with the user's mouse elsewhere.

For those who need the same feature in IE 8, this is how I solved the problem:

  var myImage = $('<img/>');

               myImage.attr('width', 300);
               myImage.attr('height', 300);
               myImage.attr('class', "groupMediaPhoto");
               myImage.attr('src', photoUrl);

I could not force IE8 to use object in constructor.

Read line by line, not the whole file:

for line in open(file_name, 'rb'):
    # process line here

Even better use with for automatically closing the file:

with open(file_name, 'rb') as f:
    for line in f:
        # process line here

The above will read the file object using an iterator, one line at a time.

Try/catch and throw clause are for different purposes. So they are not alternative to each other but they are complementary.

1. If you have throw some checked exception in your code, it should be inside some try/catch in codes calling hierarchy.

2. Conversely, you need try/catch block only if there is some throw clause inside the code (your code or the API call) that throws checked exception.

Sometimes, you may want to throw exception if particular condition occurred which you want to handle in calling code block and in some cases handle some exception catch block and throw a same or different exception again to handle in calling block.

I was pulling my hair out with the same problem. Xcode gives you the error:

Trying to start MapKit location updates without prompting for location authorization. Must call -[CLLocationManager requestWhenInUseAuthorization] or -[CLLocationManager requestAlwaysAuthorization] first.

But even if you implement one of the above methods, it won't prompt the user unless there is an entry in the info.plist for NSLocationAlwaysUsageDescription or NSLocationWhenInUseUsageDescription.

Add the following lines to your info.plist where the string values represent the reason you you need to access the users location

<key>NSLocationWhenInUseUsageDescription</key>
<string>This application requires location services to work</string>

<key>NSLocationAlwaysUsageDescription</key>
<string>This application requires location services to work</string>

I think these entries may have been missing since I started this project in Xcode 5. I'm guessing Xcode 6 might add default entries for these keys but have not confirmed.

You can find more information on these two Settings here

They deprecated getToken() method in the below release notes. Instead, we have to use getInstanceId.

https://firebase.google.com/docs/reference/android/com/google/firebase/iid/FirebaseInstanceId

Task<InstanceIdResult> task = FirebaseInstanceId.getInstance().getInstanceId();
task.addOnSuccessListener(new OnSuccessListener<InstanceIdResult>() {
      @Override
      public void onSuccess(InstanceIdResult authResult) {
          // Task completed successfully
          // ...
          String fcmToken = authResult.getToken();
      }
});

task.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
    // Task failed with an exception
    // ...
}
});

To handle success and failure in the same listener, attach an OnCompleteListener:

task.addOnCompleteListener(new OnCompleteListener<InstanceIdResult>() {
@Override
public void onComplete(@NonNull Task<InstanceIdResult> task) {
    if (task.isSuccessful()) {
        // Task completed successfully
        InstanceIdResult authResult = task.getResult();
        String fcmToken = authResult.getToken();
    } else {
        // Task failed with an exception
        Exception exception = task.getException();
    }
}
});

Also, the FirebaseInstanceIdService Class is deprecated and they came up with onNewToken method in FireBaseMessagingService as replacement for onTokenRefresh,

you can refer to the release notes here, https://firebase.google.com/support/release-notes/android

@Override
public void onNewToken(String s) {
    super.onNewToken(s);
    Use this code logic to send the info to your server.
    //sendRegistrationToServer(s);
}

In my case, which none of the answers above stated. If your device is using the miniUsb connector, make sure you are using a cable that is not charge-only. I became accustom to using developing with a newer Usb-C device and could not fathom a charge-only cable got mixed with my pack especially since there is no visible way to tell the difference.

Before you uninstall and go through a nightmare of driver reinstall and android menu options. Try a different cable first.

SELECT 'Y' REC_EXISTS             
FROM SALES                       
WHERE SALES_TYPE = 'Accessories'

The result will either be 'Y' or NULL. Simply test against 'Y'

For git <= 2.13 these two commands combined should reset your repos with recursive submodules:

git submodule foreach --recursive git reset --hard
git submodule update --recursive --init

After some local benchmarking, debugging, compiler probing, profiling, and abusing 3v4l.org to benchmark across more versions (yes, I got a warning to stop) and comparing against every variation I could find...

I give you an organically derived best-average-worst-case scenario associative array test function that is at worst roughly as good as or better than all other average-case scenarios.

/**
 * Tests if an array is an associative array.
 *
 * @param array $array An array to test.
 * @return boolean True if the array is associative, otherwise false.
 */
function is_assoc(array &$arr) {
    // don't try to check non-arrays or empty arrays
    if (FALSE === is_array($arr) || 0 === ($l = count($arr))) {
        return false;
    }

    // shortcut by guessing at the beginning
    reset($arr);
    if (key($arr) !== 0) {
        return true;
    }

    // shortcut by guessing at the end
    end($arr);
    if (key($arr) !== $l-1) {
        return true;
    }

    // rely on php to optimize test by reference or fast compare
    return array_values($arr) !== $arr;
}

From https://3v4l.org/rkieX:

<?php

// array_values
function method_1(Array &$arr) {
    return $arr === array_values($arr);
}

// method_2 was DQ; did not actually work

// array_keys
function method_3(Array &$arr) {
    return array_keys($arr) === range(0, count($arr) - 1);
}

// foreach
function method_4(Array &$arr) {
    $idx = 0;
    foreach( $arr as $key => $val ){
        if( $key !== $idx )
            return FALSE;
        ++$idx;
    }
    return TRUE;
}

// guessing
function method_5(Array &$arr) {
    global $METHOD_5_KEY;
    $i = 0;
    $l = count($arr)-1;

    end($arr);
    if ( key($arr) !== $l )
        return FALSE;

    reset($arr);
    do {
        if ( $i !== key($arr) )
            return FALSE;
        ++$i;
        next($arr);
    } while ($i < $l);
    return TRUE;
}

// naieve
function method_6(Array &$arr) {
    $i = 0;
    $l = count($arr);
    do {
        if ( NULL === @$arr[$i] )
            return FALSE;
        ++$i;
    } while ($i < $l);
    return TRUE;
}

// deep reference reliance
function method_7(Array &$arr) {
    return array_keys(array_values($arr)) === array_keys($arr);
}


// organic (guessing + array_values)
function method_8(Array &$arr) {
    reset($arr);
    if ( key($arr) !== 0 )
        return FALSE;

    end($arr);
    if ( key($arr) !== count($arr)-1 )
        return FALSE;

    return array_values($arr) === $arr;
}

function benchmark(Array &$methods, Array &$target, $expected){    
    foreach($methods as $method){
        $start = microtime(true);
        for ($i = 0; $i < 2000; ++$i) {
            //$dummy = call_user_func($method, $target);
            if ( $method($target) !== $expected ) {
                echo "Method $method is disqualified for returning an incorrect result.\n";
                unset($methods[array_search($method,$methods,true)]);
                $i = 0;
                break;
            }
        }
        if ( $i != 0 ) {
            $end = microtime(true);
            echo "Time taken with $method = ".round(($end-$start)*1000.0,3)."ms\n";
        }
    }
}



$true_targets = [
    'Giant array' => range(0, 500),
    'Tiny array' => range(0, 20),
];


$g = range(0,10);
unset($g[0]);

$false_targets = [
    'Large array 1' => range(0, 100) + ['a'=>'a'] + range(101, 200),
    'Large array 2' => ['a'=>'a'] + range(0, 200),
    'Tiny array' => range(0, 10) + ['a'=>'a'] + range(11, 20),
    'Gotcha array' => $g,
];

$methods = [
    'method_1',
    'method_3',
    'method_4',
    'method_5',
    'method_6',
    'method_7',
    'method_8'
];


foreach($false_targets as $targetName => $target){
    echo "==== Benchmark using $targetName expecing FALSE ====\n";
    benchmark($methods, $target, false);
    echo "\n";
}
foreach($true_targets as $targetName => $target){
    echo "==== Benchmark using $targetName expecting TRUE ====\n";
    benchmark($methods, $target, true);
    echo "\n";
}

.disabledLink.disabled {pointer-events:none;}

That should do it hope I helped!

In Swift 3.0

let screenSize = UIScreen.main.bounds
let screenWidth = screenSize.width
let screenHeight = screenSize.height

In older swift: Do something like this:

let screenSize: CGRect = UIScreen.mainScreen().bounds

then you can access the width and height like this:

let screenWidth = screenSize.width
let screenHeight = screenSize.height

if you want 75% of your screen's width you can go:

let screenWidth = screenSize.width * 0.75

Swift 4.0

// Screen width.
public var screenWidth: CGFloat {
    return UIScreen.main.bounds.width
}

// Screen height.
public var screenHeight: CGFloat {
    return UIScreen.main.bounds.height
}

In Swift 5.0

let screenSize: CGRect = UIScreen.main.bounds

Basically, you're not allowed to request JSON data from another domain via AJAX due to same-origin policy. AJAX allows you to fetch data after a page has already loaded, and then execute some code/call a function once it returns. We can't use AJAX but we are allowed to inject <script> tags into our own page and those are allowed to reference scripts hosted at other domains.

Usually you would use this to include libraries from a CDN such as jQuery. However, we can abuse this and use it to fetch data instead! JSON is already valid JavaScript (for the most part), but we can't just return JSON in our script file, because we have no way of knowing when the script/data has finished loading and we have no way of accessing it unless it's assigned to a variable or passed to a function. So what we do instead is tell the web service to call a function on our behalf when it's ready.

For example, we might request some data from a stock exchange API, and along with our usual API parameters, we give it a callback, like ?callback=callThisWhenReady. The web service then wraps the data with our function and returns it like this: callThisWhenReady({...data...}). Now as soon as the script loads, your browser will try to execute it (as normal), which in turns calls our arbitrary function and feeds us the data we wanted.

It works much like a normal AJAX request except instead of calling an anonymous function, we have to use named functions.

jQuery actually supports this seamlessly for you by creating a uniquely named function for you and passing that off, which will then in turn run the code you wanted.

What is the difference between them?

Image: the generic Linux kernel binary image file.

zImage: a compressed version of the Linux kernel image that is self-extracting.

uImage: an image file that has a U-Boot wrapper (installed by the mkimage utility) that includes the OS type and loader information.
A very common practice (e.g. the typical Linux kernel Makefile) is to use a zImage file. Since a zImage file is self-extracting (i.e. needs no external decompressors), the wrapper would indicate that this kernel is "not compressed" even though it actually is.

Note that the author/maintainer of U-Boot considers the (widespread) use of using a zImage inside a uImage questionable:

Actually it's pretty stupid to use a zImage inside an uImage. It is much better to use normal (uncompressed) kernel image, compress it using just gzip, and use this as poayload for mkimage. This way U-Boot does the uncompresiong instead of including yet another uncompressor with each kernel image.

(quoted from https://lists.yoctoproject.org/pipermail/yocto/2013-October/016778.html)

Which type of kernel image do I have to use?

You could choose whatever you want to program for.
For economy of storage, you should probably chose a compressed image over the uncompressed one.
Beware that executing the kernel (presumably the Linux kernel) involves more than just loading the kernel image into memory. Depending on the architecture (e.g. ARM) and the Linux kernel version (e.g. with or without DTB), there are registers and memory buffers that may have to be prepared for the kernel. In one instance there was also hardware initialization that U-Boot performed that had to be replicated.

ADDENDUM

I know that u-boot needs a kernel in uImage format.

That is accurate for all versions of U-Boot which only have the bootm command.
But more recent versions of U-Boot could also have the bootz command that can boot a zImage.

I would recommend creating a TNSNAMES.ORA file. From your Oracle Client install directory, navigate to NETWORK\ADMIN. You may already have a file called TNSNAMES.ORA, if so edit it, else create it using your favorite text editor.

Next, simply add an entry like this:

MYDB =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 123.45.67.89)(PORT = 1521))
    (CONNECT_DATA = (SID = TEST)(SERVER = DEDICATED))
  )

You can change MYDB to whatever you like, this is the identifier that applications will will use to find the database using the info from TNSNAMES.

Finally, login with MYDB as your database in PL/SQL Developer. It should automatically find the connection string in the TNSNAMES.ORA.

If that does not work, hit Help->About then click the icon with an "i" in it in the upper-lefthand corner. The fourth tab is the "TNS Names" tab, check it to confirm that it is loading the proper TNSNAMES.ORA file. If it is not, you may have multiple Oracle installations on your computer, and you will need to find the one that is in use.

The defer attribute is a boolean attribute.

When present, it specifies that the script is executed when the page has finished parsing.

Note: The defer attribute is only for external scripts (should only be used if the src attribute is present).

Note: There are several ways an external script can be executed:

If async is present: The script is executed asynchronously with the rest of the page (the script will be executed while the page continues the parsing) If async is not present and defer is present: The script is executed when the page has finished parsing If neither async or defer is present: The script is fetched and executed immediately, before the browser continues parsing the page

This line worked:

$("#myDropDown option:contains(myText)").attr('selected', true);

You can create a pre-filled form URL from within the Form Editor, as described in the documentation for Drive Forms. You'll end up with a URL like this, for example:

https://docs.google.com/forms/d/--form-id--/viewform?entry.726721210=Mike+Jones&entry.787184751=1975-05-09&entry.1381372492&entry.960923899

buildUrls()

In this example, question 1, "Name", has an ID of 726721210, while question 2, "Birthday" is 787184751. Questions 3 and 4 are blank.

You could generate the pre-filled URL by adapting the one provided through the UI to be a template, like this:

function buildUrls() {
  var template = "https://docs.google.com/forms/d/--form-id--/viewform?entry.726721210=##Name##&entry.787184751=##Birthday##&entry.1381372492&entry.960923899";
  var ss = SpreadsheetApp.getActive().getSheetByName("Sheet1");  // Email, Name, Birthday
  var data = ss.getDataRange().getValues();

  // Skip headers, then build URLs for each row in Sheet1.
  for (var i = 1; i < data.length; i++ ) {
    var url = template.replace('##Name##',escape(data[i][1]))
                      .replace('##Birthday##',data[i][2].yyyymmdd());  // see yyyymmdd below
    Logger.log(url);  // You could do something more useful here.
  }
};

This is effective enough - you could email the pre-filled URL to each person, and they'd have some questions already filled in.

betterBuildUrls()

Instead of creating our template using brute force, we can piece it together programmatically. This will have the advantage that we can re-use the code without needing to remember to change the template.

Each question in a form is an item. For this example, let's assume the form has only 4 questions, as you've described them. Item [0] is "Name", [1] is "Birthday", and so on.

We can create a form response, which we won't submit - instead, we'll partially complete the form, only to get the pre-filled form URL. Since the Forms API understands the data types of each item, we can avoid manipulating the string format of dates and other types, which simplifies our code somewhat.

(EDIT: There's a more general version of this in How to prefill Google form checkboxes?)

/**
 * Use Form API to generate pre-filled form URLs
 */
function betterBuildUrls() {
  var ss = SpreadsheetApp.getActive();
  var sheet = ss.getSheetByName("Sheet1");
  var data = ss.getDataRange().getValues();  // Data for pre-fill

  var formUrl = ss.getFormUrl();             // Use form attached to sheet
  var form = FormApp.openByUrl(formUrl);
  var items = form.getItems();

  // Skip headers, then build URLs for each row in Sheet1.
  for (var i = 1; i < data.length; i++ ) {
    // Create a form response object, and prefill it
    var formResponse = form.createResponse();

    // Prefill Name
    var formItem = items[0].asTextItem();
    var response = formItem.createResponse(data[i][1]);
    formResponse.withItemResponse(response);

    // Prefill Birthday
    formItem = items[1].asDateItem();
    response = formItem.createResponse(data[i][2]);
    formResponse.withItemResponse(response);

    // Get prefilled form URL
    var url = formResponse.toPrefilledUrl();
    Logger.log(url);  // You could do something more useful here.
  }
};

yymmdd Function

Any date item in the pre-filled form URL is expected to be in this format: yyyy-mm-dd. This helper function extends the Date object with a new method to handle the conversion.

When reading dates from a spreadsheet, you'll end up with a javascript Date object, as long as the format of the data is recognizable as a date. (Your example is not recognizable, so instead of May 9th 1975 you could use 5/9/1975.)

// From http://blog.justin.kelly.org.au/simple-javascript-function-to-format-the-date-as-yyyy-mm-dd/
Date.prototype.yyyymmdd = function() {
  var yyyy = this.getFullYear().toString();                                    
  var mm = (this.getMonth()+1).toString(); // getMonth() is zero-based         
  var dd  = this.getDate().toString();             

  return yyyy + '-' + (mm[1]?mm:"0"+mm[0]) + '-' + (dd[1]?dd:"0"+dd[0]);
};

Here is how you do it with some simple Excel formulae, and no fancy VBA needed. The trick is to use the OFFSET formula. Please see this example spreadsheet:

https://docs.google.com/spreadsheet/ccc?key=0AuSyDFZlcRtHdGJOSnFwREotRzFfM28tWElpZ1FaR2c&usp=sharing#gid=0

The ?type=daily argument (ending up in the $_GET array) is only valid for web-accessed pages.

You'll need to call it like php myfile.php daily and retrieve that argument from the $argv array (which would be $argv[1], since $argv[0] would be myfile.php).

If the page is used as a webpage as well, there are two options you could consider. Either accessing it with a shell script and Wget, and call that from cron:

#!/bin/sh
wget http://location.to/myfile.php?type=daily

Or check in the PHP file whether it's called from the command line or not:

if (defined('STDIN')) {
  $type = $argv[1];
} else {
  $type = $_GET['type'];
}

(Note: You'll probably need/want to check if $argv actually contains enough variables and such)

You need to use get_serving_url from the Images API. As that page explains, you need to call create_gs_key() first to get the key to pass to the Images API.

You must specify your file in the copy:

xcopy C:\source\myfile.txt C:\target

Or if you want to copy all txt files for example

xcopy C:\source\*.txt C:\target

If you actually want a static property of your class, that isn't currently supported in Swift. The current advice is to get around that by using global constants:

let testStr = "test"
let testStrLen = countElements(testStr)

class MyClass {
    func myFunc() {
    }
}

If you want these to be instance properties instead, you can use a lazy stored property for the length -- it will only get evaluated the first time it is accessed, so you won't be computing it over and over.

class MyClass {
    let testStr: String = "test"
    lazy var testStrLen: Int = countElements(self.testStr)

    func myFunc() {
    }
}

Or use regex assertions: grep -oP '(?<=potato: ).*' file.txt

I took your question as a challenge to write this in "portable" shell code, i.e.

• with a POSIX shell in mind
• no bashisms such as arrays
• avoid calling externals like the plague. There's not a single fork in the script! That makes it blazingly fast, especially on systems with significant fork overhead, like cygwin.
• Must deal with glob characters in pathnames (*, ?, [, ])

It runs on any POSIX conformant shell (zsh, bash, ksh, ash, busybox, ...). It even contains a testsuite to verify its operation. Canonicalization of pathnames is left as an exercise. :-)

#!/bin/sh

# Find common parent directory path for a pair of paths.
# Call with two pathnames as args, e.g.
# commondirpart foo/bar foo/baz/bat -> result="foo/"
# The result is either empty or ends with "/".
commondirpart () {
   result=""
   while test ${#1} -gt 0 -a ${#2} -gt 0; do
      if test "${1%${1#?}}" != "${2%${2#?}}"; then   # First characters the same?
         break                                       # No, we're done comparing.
      fi
      result="$result${1%${1#?}}"                    # Yes, append to result.
      set -- "${1#?}" "${2#?}"                       # Chop first char off both strings.
   done
   case "$result" in
   (""|*/) ;;
   (*)     result="${result%/*}/";;
   esac
}

# Turn foo/bar/baz into ../../..
#
dir2dotdot () {
   OLDIFS="$IFS" IFS="/" result=""
   for dir in $1; do
      result="$result../"
   done
   result="${result%/}"
   IFS="$OLDIFS"
}

# Call with FROM TO args.
relativepath () {
   case "$1" in
   (*//*|*/./*|*/../*|*?/|*/.|*/..)
      printf '%s\n' "'$1' not canonical"; exit 1;;
   (/*)
      from="${1#?}";;
   (*)
      printf '%s\n' "'$1' not absolute"; exit 1;;
   esac
   case "$2" in
   (*//*|*/./*|*/../*|*?/|*/.|*/..)
      printf '%s\n' "'$2' not canonical"; exit 1;;
   (/*)
      to="${2#?}";;
   (*)
      printf '%s\n' "'$2' not absolute"; exit 1;;
   esac

   case "$to" in
   ("$from")   # Identical directories.
      result=".";;
   ("$from"/*) # From /x to /x/foo/bar -> foo/bar
      result="${to##$from/}";;
   ("")        # From /foo/bar to / -> ../..
      dir2dotdot "$from";;
   (*)
      case "$from" in
      ("$to"/*)       # From /x/foo/bar to /x -> ../..
         dir2dotdot "${from##$to/}";;
      (*)             # Everything else.
         commondirpart "$from" "$to"
         common="$result"
         dir2dotdot "${from#$common}"
         result="$result/${to#$common}"
      esac
      ;;
   esac
}

set -f # noglob

set -x
cat <<EOF |
/ / .
/- /- .
/? /? .
/?? /?? .
/??? /??? .
/?* /?* .
/* /* .
/* /** ../**
/* /*** ../***
/*.* /*.** ../*.**
/*.??? /*.?? ../*.??
/[] /[] .
/[a-z]* /[0-9]* ../[0-9]*
/foo /foo .
/foo / ..
/foo/bar / ../..
/foo/bar /foo ..
/foo/bar /foo/baz ../baz
/foo/bar /bar/foo  ../../bar/foo
/foo/bar/baz /gnarf/blurfl/blubb ../../../gnarf/blurfl/blubb
/foo/bar/baz /gnarf ../../../gnarf
/foo/bar/baz /foo/baz ../../baz
/foo. /bar. ../bar.
EOF
while read FROM TO VIA; do
   relativepath "$FROM" "$TO"
   printf '%s\n' "FROM: $FROM" "TO:   $TO" "VIA:  $result"
   if test "$result" != "$VIA"; then
      printf '%s\n' "OOOPS! Expected '$VIA' but got '$result'"
   fi
done

# vi: set tabstop=3 shiftwidth=3 expandtab fileformat=unix :

In latest version(2012 or more) we can get modified stored procedure detail by using this query

SELECT create_date, modify_date, name FROM sys.procedures 
ORDER BY modify_date DESC

the wmic bios get serialnumber command call the Win32_BIOS wmi class and get the value of the SerialNumber property, which retrieves the serial number of the BIOS Chip of your system.

They're both joins and where that do the same thing.

Give a look at In MySQL queries, why use join instead of where?

Use a CultureInfo like this, from MSDN:

// Creates a CultureInfo for German in Germany.
CultureInfo ci = new CultureInfo("de-DE");

// Displays dt, formatted using the CultureInfo
Console.WriteLine(dt.ToString(ci));

More info on MSDN. Here is a link of all different cultures.

If you are using more than one libraries of firebase then make sure that the version are same.

Before:
  compile 'com.google.firebase:firebase-database:9.2.0'
    compile 'com.google.firebase:firebase-storage:9.2.0'
    compile 'com.firebaseui:firebase-ui-database:0.4.0'
    compile 'com.squareup.picasso:picasso:2.5.2'
    compile 'com.google.firebase:firebase-auth:9.0.2'

After:  compile 'com.google.firebase:firebase-database:9.2.0'
    compile 'com.google.firebase:firebase-storage:9.2.0'
    compile 'com.firebaseui:firebase-ui-database:0.4.0'
    compile 'com.squareup.picasso:picasso:2.5.2'
    compile 'com.google.firebase:firebase-auth:9.2.0'

in my case i have used auth with 9.0.2 .So i changed to 9.2.0

For those who tried gkalpak answer and it did not work,

be aware that chrome will add the content script to a needed page only when your extension enabled during chrome launch and also a good idea restart browser after making these changes

Here are many variations of the one answer :) My is another one and it uses extension mechanism as comfortable way to execute (handy):

public static void AddToList<T, U>(this IDictionary<T, List<U>> dict, T key, U elementToList)
{

    List<U> list;

    bool exists = dict.TryGetValue(key, out list);

    if (exists)
    {
        dict[key].Add(elementToList);
    }
    else
    {
        dict[key] = new List<U>();
        dict[key].Add(elementToList);
    }

}

Then you use it as follows:

Dictionary<int, List<string>> dict = new Dictionary<int, List<string>>();

dict.AddToList(4, "test1");
dict.AddToList(4, "test2");
dict.AddToList(4, "test3");

dict.AddToList(5, "test4");

There are likely to be many ways to accomplish this. My suggestion is to use Case/When to do it. With 3 columns, it's not too bad.

Select Id,
       Case When Col1 < Col2 And Col1 < Col3 Then Col1
            When Col2 < Col1 And Col2 < Col3 Then Col2 
            Else Col3
            End As TheMin
From   YourTableNameHere

After 2 hours of browsing for various alternatives, this is something that worked for me.

My requirement was disabling caching of js and css files in my spring secured web application. But at the same time caching these files "within" a particular session.

Passing a unique id with every request is one of the advised approaches.

And this is what I did :- Instead of

<script language="javascript" src="js/home.js"></script>

I used

<script language="javascript" src="js/home.js?id=${pageContext.session.id}"></script>

Any cons to the above approach are welcome. Security Issues ?

alter user username superuser;

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.

The meaning of the word can differ a lot with context. In general, it's resources (most often memory and CPU time) that are used, which do not contribute directly to the intended result, but are required by the technology or method that is being used. Examples:

• Protocol overhead: Ethernet frames, IP packets and TCP segments all have headers, TCP connections require handshake packets. Thus, you cannot use the entire bandwidth the hardware is capable of for your actual data. You can reduce the overhead by using larger packet sizes and UDP has a smaller header and no handshake.
• Data structure memory overhead: A linked list requires at least one pointer for each element it contains. If the elements are the same size as a pointer, this means a 50% memory overhead, whereas an array can potentially have 0% overhead.
• Method call overhead: A well-designed program is broken down into lots of short methods. But each method call requires setting up a stack frame, copying parameters and a return address. This represents CPU overhead compared to a program that does everything in a single monolithic function. Of course, the added maintainability makes it very much worth it, but in some cases, excessive method calls can have a significant performance impact.

var uniq = allvalues.GroupBy(x => x.Id).Select(y=>y.First()).Distinct();

Easy and simple

The corporate HTTP proxy behind which I currently am sporadically gives this error. I can fix it by simply visiting bitbucket.org in a browser, then retyring the command. Have no idea why this works, but it does fix it for me (at least temporarily).

There is no installcheck element in the bootstrapper package manifest shipped with Visual C++. Guess Microsoft wants to always install if you set it as a prerequisite.

Of course you can still call MsiQueryProductState to check if the VC redist package is installed via MSI, The package code can be found by running

wmic product get

at command line, or if you are already at wmic:root\cli, run

product where "Caption like '%C++ 2012%'"

Or you may try this:

?php

/**
* Mobile Detect
* @license    http://www.opensource.org/licenses/mit-license.php The MIT License
*/
class Mobile_Detect
{
    protected $accept;
    protected $userAgent;
    protected $isMobile = false;
    protected $isAndroid = null;
    protected $isAndroidtablet = null;
    protected $isIphone = null;
    protected $isIpad = null;
    protected $isBlackberry = null;
    protected $isBlackberrytablet = null;
    protected $isOpera = null;
    protected $isPalm = null;
    protected $isWindows = null;
    protected $isWindowsphone = null;
    protected $isGeneric = null;
    protected $devices = array(
    "android" => "android.*mobile",
    "androidtablet" => "android(?!.*mobile)",
    "blackberry" => "blackberry",
    "blackberrytablet" => "rim tablet os",
    "iphone" => "(iphone|ipod)",
    "ipad" => "(ipad)",
    "palm" => "(avantgo|blazer|elaine|hiptop|palm|plucker|xiino)",
    "windows" => "windows ce; (iemobile|ppc|smartphone)",
    "windowsphone" => "windows phone os",
    "generic" => "(kindle|mobile|mmp|midp|pocket|psp|symbian|smartphone|treo|up.browser|up.link|vodafone|wap|opera mini)");

    public function __construct()
    {
        $this->userAgent = $_SERVER['HTTP_USER_AGENT'];
        $this->accept = $_SERVER['HTTP_ACCEPT'];

        if (isset($_SERVER['HTTP_X_WAP_PROFILE']) || isset($_SERVER['HTTP_PROFILE']))
        {
            $this->isMobile = true;
        }
        elseif (strpos($this->accept, 'text/vnd.wap.wml') > 0 || strpos($this->accept, 'application/vnd.wap.xhtml+xml') > 0)
        {
            $this->isMobile = true;
        }
        else
        {
            foreach ($this->devices as $device => $regexp)
            {
                if ($this->isDevice($device))
                {
                    $this->isMobile = true;
                }
            }
        }
    }

    /**
    * Overloads isAndroid() | isAndroidtablet() | isIphone() | isIpad() | isBlackberry() | isBlackberrytablet() | isPalm() | isWindowsphone() | isWindows() | isGeneric() through isDevice()
    *
    * @param string $name
    * @param array $arguments
    * @return bool
    */
    public function __call($name, $arguments)
    {
        $device = substr($name, 2);
        if ($name == "is" . ucfirst($device) && array_key_exists(strtolower($device), $this->devices))
        {
            return $this->isDevice($device);
        } 
        else
        {
            trigger_error("Method $name not defined", E_USER_WARNING);
        }
    }

    /**
    * Returns true if any type of mobile device detected, including special ones
    * @return bool
    */
    public function isMobile()
    {
        return $this->isMobile;
    }

    protected function isDevice($device)
    {
        $var = "is" . ucfirst($device);
        $return = $this->$var === null ? (bool) preg_match("/" . $this->devices[strtolower($device)] . "/i", $this->userAgent) : $this->$var;
        if ($device != 'generic' && $return == true) {
        $this->isGeneric = false;
    }
    return $return;
}

Your example:

{
    "items":
    [
        {
            "WR":"qwe",
            "QU":"asd",
            "QA":"end",
            "WO":"hasd",
            "NO":"qwer"
        },
        ...
    ]
}

add an element "itemorder"

{
    "items":
    [
        {
            "WR":"qwe",
            "QU":"asd",
            "QA":"end",
            "WO":"hasd",
            "NO":"qwer"
        },
        ...
    ],
    "itemorder":["WR","QU","QA","WO","NO"]
}

This code generates the desired output without the column title line:

JSONObject output = new JSONObject(json);
JSONArray docs = output.getJSONArray("data");
JSONArray names = output.getJSONArray("itemOrder");
String csv = CDL.toString(names,docs);

How about;

function keyValue(key, value){
    this.Key = key;
    this.Value = value;
};
keyValue.prototype.updateTo = function(newKey, newValue) {
    this.Key = newKey;
    this.Value = newValue;  
};

array[1].updateTo("xxx", "999");   

git remote prune origin prunes tracking branches not on the remote.

git branch --merged lists branches that have been merged into the current branch.

xargs git branch -d deletes branches listed on standard input.

Be careful deleting branches listed by git branch --merged. The list could include master or other branches you'd prefer not to delete.

To give yourself the opportunity to edit the list before deleting branches, you could do the following in one line:

git branch --merged >/tmp/merged-branches && \
  vi /tmp/merged-branches && xargs git branch -d </tmp/merged-branches

From the documentation:

Dynamic web applications also need static files. That’s usually where the CSS and JavaScript files are coming from. Ideally your web server is configured to serve them for you, but during development Flask can do that as well. Just create a folder called static in your package or next to your module and it will be available at /static on the application.

To generate URLs for static files, use the special 'static' endpoint name:

url_for('static', filename='style.css')

The file has to be stored on the filesystem as static/style.css.

This is a working example of making ZIPs in PHP:

$zip = new ZipArchive();
$zip_name = time().".zip"; // Zip name
$zip->open($zip_name,  ZipArchive::CREATE);
foreach ($files as $file) {
  echo $path = "uploadpdf/".$file;
  if(file_exists($path)){
  $zip->addFromString(basename($path),  file_get_contents($path));  
  }
  else{
   echo"file does not exist";
  }
}
$zip->close();

If you use jQuery then you can write the following code:

$("#selectId option:selected").html();

There are not many good reasons this would fail, especially the regsvr32 step. Run dumpbin /exports on that dll. If you don't see DllRegisterServer then you've got a corrupt install. It should have more side-effects, you wouldn't be able to build C/C++ projects anymore.

One standard failure mode is running this on a 64-bit operating system. This is 32-bit unmanaged code, you would indeed get the 'class not registered' exception. Project + Properties, Build tab, change Platform Target to x86.

Not so hard:

#include <thread>

void Test::runMultiThread()
{
    std::thread t1(&Test::calculate, this,  0, 10);
    std::thread t2(&Test::calculate, this, 11, 20);
    t1.join();
    t2.join();
}

If the result of the computation is still needed, use a future instead:

#include <future>

void Test::runMultiThread()
{
     auto f1 = std::async(&Test::calculate, this,  0, 10);
     auto f2 = std::async(&Test::calculate, this, 11, 20);

     auto res1 = f1.get();
     auto res2 = f2.get();
}

Swift 5.1 Custom Object/Type

// MARK: - NotificationName
// Extending notification name to avoid string errors.
extension Notification.Name {
    static let yourNotificationName = Notification.Name("yourNotificationName")
}


// MARK: - CustomObject
class YourCustomObject {
    // Any stuffs you would like to set in your custom object as always.
    init() {}
}

// MARK: - Notification Sender Class
class NotificatioSenderClass {

     // Just grab the content of this function and put it to your function responsible for triggering a notification.
    func postNotification(){
        // Note: - This is the important part pass your object instance as object parameter.
        let yourObjectInstance = YourCustomObject()
        NotificationCenter.default.post(name: .yourNotificationName, object: yourObjectInstance)
    }
}

// MARK: -Notification  Receiver class
class NotificationReceiverClass: UIViewController {
    // MARK: - ViewController Lifecycle
    override func viewDidLoad() {
        super.viewDidLoad()
        // Register your notification listener
        NotificationCenter.default.addObserver(self, selector: #selector(didReceiveNotificationWithCustomObject), name: .yourNotificationName, object: nil)
    }

    // MARK: - Helpers
    @objc private func didReceiveNotificationWithCustomObject(notification: Notification){
        // Important: - Grab your custom object here by casting the notification object.
        guard let yourPassedObject = notification.object as? YourCustomObject else {return}
        // That's it now you can use your custom object
        //
        //

    }
      // MARK: - Deinit
  deinit {
      // Save your memory by releasing notification listener
      NotificationCenter.default.removeObserver(self, name: .yourNotificationName, object: nil)
    }




}

you should be able to just overwrite it without removing previous data

In Tomcat 8 you can also use the rewrite-valve

RewriteCond %{REQUEST_URI} ^/$
RewriteRule ^/(.*)$         /somethingelse/index.jsp

To setup the rewrite-valve look here:

http://tonyjunkes.com/blog/a-brief-look-at-the-rewrite-valve-in-tomcat-8/

Answer for BigDecimal throws ArithmeticException

public static void main(String[] args) {
        int age = 30;
        BigDecimal retireMentFund = new BigDecimal("10000.00");
        retireMentFund.setScale(2,BigDecimal.ROUND_HALF_UP);
        BigDecimal yearsInRetirement = new BigDecimal("20.00");
        String name = " Dennis";
        for ( int i = age; i <=65; i++){
            recalculate(retireMentFund,new BigDecimal("0.10"));
        }
        BigDecimal monthlyPension =   retireMentFund.divide(
                yearsInRetirement.divide(new BigDecimal("12"), new MathContext(2, RoundingMode.CEILING)), new MathContext(2, RoundingMode.CEILING));      
        System.out.println(name+ " will have £" + monthlyPension +" per month for retirement");
    }
public static void recalculate (BigDecimal fundAmount, BigDecimal rate){
        fundAmount.multiply(rate.add(new BigDecimal("1.00")));
    }

Add MathContext object in your divide method call and adjust precision and rounding mode. This should fix your problem

Lint gave me an advice concerning inconsistency: I wrote (onBindViewHolder()):

pholder.mRlayout.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        doStuff(position);
                    }
                });

which had to be replaced by :

pholder.mRlayout.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        doStuff(pholder.getAdapterPosition());
                    }
                });

Run both codes in your code and then run Lint for the full explaination!!

The most common answer to that is simple: Bundle few apps (busybox?) with your APK (assuming you want to use it within an application). As far as I know, the /data partition is not mounted noexec, and even if you don't want to deploy a fully-fledged APK, you could modify ConnectBot sources to build an APK with a set of command line tools included.

For command line tools, I recommend using crosstool-ng and building a set of statically-linked tools (linked against uClibc). They might be big, but they'll definitely work.

Starting from this @Kartik Patel example , I have changed a little maybe now is more clear about static variable

 public class Variable
    {
        public static string StaticName = "Sophia ";
        public string nonStName = "Jenna ";
        public void test()
        {
            StaticName = StaticName + " Lauren"; 
            Console.WriteLine("  static ={0}",StaticName);
            nonStName = nonStName + "Bean ";
            Console.WriteLine("  NeStatic neSt={0}", nonStName);

        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            Variable var = new Variable();
            var.test();
            Variable var1 = new Variable();
            var1.test();
            Variable var2 = new Variable();
            var2.test();
            Console.ReadKey();

        }
    }

Output 
  static =Sophia  Lauren
  NeStatic neSt=Jenna Bean
  static =Sophia  Lauren Lauren
  NeStatic neSt=Jenna Bean
  static =Sophia  Lauren Lauren Lauren
  NeStatic neSt=Jenna Bean

2. Class Variable VS Instance Variable in C#

   Static Class Members C# OR Class Variable

   class A
   {
       // Class variable or " static member variable"  are declared with 
       //the "static " keyword
   
       public static int i=20;
       public int j=10;         //Instance variable 
       public static string s1="static class variable"; //Class variable 
       public string s2="instance variable";        // instance variable 
   }
   class Program
   {
       static void Main(string[] args)
       {
           A obj1 = new A();
   
           // obj1 instance variables 
           Console.WriteLine("obj1 instance variables ");
           Console.WriteLine(A.i);
           Console.WriteLine(obj1.j);
           Console.WriteLine(obj1.s2);
           Console.WriteLine(A.s1);
   
           A obj2 = new A();
   
           // obj2 instance variables 
           Console.WriteLine("obj2 instance variables ");
           Console.WriteLine(A.i);
           Console.WriteLine(obj2.j);
           Console.WriteLine(obj2.s2);
           Console.WriteLine(A.s1);
   
           Console.ReadKey();
   
       }
   
   
   }
   

   }

https://en.wikipedia.org/wiki/Class_variable

https://en.wikipedia.org/wiki/Instance_variable

https://en.wikipedia.org/wiki/Static_variable

https://javaconceptoftheday.com/class-variables-and-instance-variables-in-java/?fbclid=IwAR1_dtpHzg3bC5WlGQGdgewaTvuOI6cwVeFUtTV8IZuGTj1qH5PmKGwX0yM

https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/classes-and-structs/static-classes-and-static-class-members

In case you use Spring Test try org.springframework.test.util.ReflectionTestUtils

 ReflectionTestUtils.setField(testObject, "person", mockedPerson);

Use port number 22 (for sftp) instead of 21 (normal ftp). Solved this problem for me.

You can use Notepad++ to evaluate a file's encoding without needing to write code. The evaluated encoding of the open file will display on the bottom bar, far right side. The encodings supported can be seen by going to Settings -> Preferences -> New Document/Default Directory and looking in the drop down.

package name with 0 may cause problem for sharedPreference.

(OK) con = createPackageContext("com.example.android.sf1", 0);

(Problem but no error)

con = createPackageContext("com.example.android.sf01", 0);

DateTime.Now will not work, use DateTime.Today instead.

There is no str accessor for datetimes and you can't do dates.astype(str) either, you can call apply and use datetime.strftime:

In [73]:

dates = pd.to_datetime(pd.Series(['20010101', '20010331']), format = '%Y%m%d')
dates.apply(lambda x: x.strftime('%Y-%m-%d'))
Out[73]:
0    2001-01-01
1    2001-03-31
dtype: object

You can change the format of your date strings using whatever you like: strftime() and strptime() Behavior.

Update

As of version 0.17.0 you can do this using dt.strftime

dates.dt.strftime('%Y-%m-%d')

will now work

If the divs are hidden, they will never trigger the mouseover event.

You will have to listen to the event of some other unhidden element.

You can consider wrapping your hidden divs into container divs that remain visible, and then act on the mouseover event of these containers.

<div style="width: 80px; height: 20px; background-color: red;" _x000D_
        onmouseover="document.getElementById('div1').style.display = 'block';">_x000D_
   <div id="div1" style="display: none;">Text</div>_x000D_
</div>

You could also listen for the mouseout event if you want the div to disappear when the mouse leaves the container div:

onmouseout="document.getElementById('div1').style.display = 'none';"

You can create a class with the answer of @Ionu? G. Stan

function obj(){
    obj=new Object();
    this.add=function(key,value){
        obj[""+key+""]=value;
    }
    this.obj=obj
}

Creating a new object with the last class:

my_obj=new obj();
my_obj.add('key1', 'value1');
my_obj.add('key2', 'value2');
my_obj.add('key3','value3');

Printing the object

console.log(my_obj.obj) // Return {key1: "value1", key2: "value2", key3: "value3"} 

Printing a Key

console.log(my_obj.obj["key3"]) //Return value3

I'm newbie in javascript, comments are welcome. Works for me.

To do what you want, using the fs.createWriteStream(path[, options]) function in a ES6 way:

const fs = require('fs');
const writeStream = fs.createWriteStream('file.txt');
const pathName = writeStream.path;
 
let array = ['1','2','3','4','5','6','7'];
  
// write each value of the array on the file breaking line
array.forEach(value => writeStream.write(`${value}\n`));

// the finish event is emitted when all data has been flushed from the stream
writeStream.on('finish', () => {
   console.log(`wrote all the array data to file ${pathName}`);
});

// handle the errors on the write process
writeStream.on('error', (err) => {
    console.error(`There is an error writing the file ${pathName} => ${err}`)
});

// close the stream
writeStream.end();

This should work same :

SELECT MAX(salary) max_salary,
  (SELECT MAX(salary)
   FROM Employee
   WHERE salary NOT IN
       (SELECT MAX(salary)
        FROM Employee)) 2nd_max_salary
FROM Employee

SELECT col1,
  col2
FROM
  (SELECT rownum X,col_table1 FROM table1) T1
INNER JOIN
  (SELECT rownum Y, col_table2 FROM table2) T2
ON T1.X=T2.Y;

You can download the xgboost package to your local computer, and you better place the xgboost source file under D:\ or C:\ (ps: download address: http://www.lfd.uci.edu/~gohlke/pythonlibs/#xgboost, and select "xgboost-0.6-cp35-cp35m-win_amd64.whl",but it is up to your operation system), and you open the Anaconda prompt, type in pip install D:\xgboost-0.6-cp35-cp35m-win_amd64.whl, then you can successful install xgboost into your anaconda

This may or may not help you address your problem, OP, but to get the timezone of the current server relative to UTC (UT1, technically), do:

SELECT EXTRACT(TIMEZONE FROM now())/3600.0;

The above works by extracting the UT1-relative offset in minutes, and then converting it to hours using the factor of 3600 secs/hour.

Example:

SET SESSION timezone TO 'Asia/Kabul';
SELECT EXTRACT(TIMEZONE FROM now())/3600.0;
-- output: 4.5 (as of the writing of this post)

(docs).

You might have an easier time first implementing it with mouse events to prototype.

There are many answers here, including the top, should be used with caution as they do not consider edge cases especially around bounding boxes.

See:

• Touch Events
• Mouse Events

You will need to experiment to catch edge cases and behaviours such as the pointer moving outside of the element before ending.

A swipe is a very basic gesture which is a higher level of interface pointer interaction processing roughly sitting between processing raw events and handwriting recognition.

There's no single exact method for detecting a swipe or a fling though virtually all generally follow a basic principle of detecting a motion across an element with a threshold of distance and speed or velocity. You might simply say that if there is a movement across 65% of the screen size in a given direction within a given time then it is a swipe. Exactly where you draw the line and how you calculate it is up to you.

Some might also look at it from the perspective of momentum in a direction and how far off the screen it has been pushed when the element is released. This is clearer with sticky swipes where the element can be dragged and then on release will either bounce back or fly off the screen as if the elastic broke.

It's probably ideal to try to find a gesture library that you can either port or reuse that's commonly used for consistency. Many of the examples here are excessively simplistic, registering a swipe as the slightest touch in any direction.

Android would be the obvious choice though has the opposite problem, it's overly complex.

Many people appear to have misinterpreted the question as any movement in a direction. A swipe is a broad and relatively brief motion overwhelmingly in a single direction (though may be arced and have certain acceleration properties). A fling is similar though intends to casually propel an item away a fair distance under its own momentum.

The two are sufficiently similar that some libraries might only provide fling or swipe, which can be used interchangeably. On a flat screen it's difficult to truly separate the two gestures and generally speaking people are doing both (swiping the physical screen but flinging the UI element displayed on the screen).

You best option is to not do it yourself. There are already a large number of JavaScript libraries for detecting simple gestures.

You can use filterfalse function from itertools module

Example

import random
from itertools import filterfalse

random.seed(42)

data = [random.randrange(5) for _ in range(10)]
clean = [*filterfalse(lambda i: i == 0, data)]
print(f"Remove 0s\n{data=}\n{clean=}\n")


clean = [*filterfalse(lambda i: i in (0, 1), data)]
print(f"Remove 0s and 1s\n{data=}\n{clean=}")

Output:

Remove 0s
data=[0, 0, 2, 1, 1, 1, 0, 4, 0, 4]
clean=[2, 1, 1, 1, 4, 4]

Remove 0s and 1s
data=[0, 0, 2, 1, 1, 1, 0, 4, 0, 4]
clean=[2, 4, 4]

Hexyl formats nicely: sudo apt install hexyl

Please set your form action attribute as below it will solve your problem.

<form name="addProductForm" id="addProductForm" action="javascript:;" enctype="multipart/form-data" method="post" accept-charset="utf-8">

jQuery code:

$(document).ready(function () {
    $("#addProductForm").submit(function (event) {

        //disable the default form submission
        event.preventDefault();
        //grab all form data  
        var formData = $(this).serialize();

        $.ajax({
            url: 'addProduct.php',
            type: 'POST',
            data: formData,
            async: false,
            cache: false,
            contentType: false,
            processData: false,
            success: function () {
                alert('Form Submitted!');
            },
            error: function(){
                alert("error in ajax form submission");
            }
        });

        return false;
    });
});

• ---One to Many--- A Parent can have two or more children.

• ---Many to one--- Those 3 children can have a single Parent

  Both are similar. This can be used according to the need. If you want to find children for a particular parent, then you can go with One-To-Many. Or else, want to find parents for twins, you may go with Many-To-One.

Another argument often used against singletons is their testability problems. Singletons are not easily mockable for testing purposes. If this turns out to be a problem, I like to make the following slight modification:

public class SingletonImpl {

    private static SingletonImpl instance;

    public static SingletonImpl getInstance() {
        if (instance == null) {
            instance = new SingletonImpl();
        }
        return instance;
    }

    public static void setInstance(SingletonImpl impl) {
        instance = impl;
    }

    public void a() {
        System.out.println("Default Method");
    }
}

The added setInstance method allows setting a mockup implementation of the singleton class during testing:

public class SingletonMock extends SingletonImpl {

    @Override
    public void a() {
        System.out.println("Mock Method");
    }

}

This also works with early initialization approaches:

public class SingletonImpl {

    private static final SingletonImpl instance = new SingletonImpl();

    private static SingletonImpl alt;

    public static void setInstance(SingletonImpl inst) {
        alt = inst;
    }

    public static SingletonImpl getInstance() {
        if (alt != null) {
            return alt;
        }
        return instance;
    }

    public void a() {
        System.out.println("Default Method");
    }
}

public class SingletonMock extends SingletonImpl {

    @Override
    public void a() {
        System.out.println("Mock Method");
    }

}

This has the drawback of exposing this functionality to the normal application too. Other developers working on that code could be tempted to use the ´setInstance´ method to alter a specific function and thus changing the whole application behaviour, and therefore this method should contain at least a good warning in its javadoc.

Still, for the possibility of mockup-testing (when needed), this code exposure may be an acceptable price to pay.

For RedHat / CentOS here's the code that creates a user, adds the passwords and makes the user a sudoer:

#!/bin/sh
echo -n "Enter username: "
read uname

echo -n "Enter password: "
read -s passwd

adduser "$uname"
echo $uname:$passwd | sudo chpasswd

gpasswd wheel -a $uname

This worked for me

var serializeJSON = function(data) {
  return Object.keys(data).map(function (keyName) {
    return encodeURIComponent(keyName) + '=' + encodeURIComponent(data[keyName])
  }).join('&');
}

var response = fetch(url, {
  method: 'POST',
  body: serializeJSON({
    haha: 'input'
  })
});

To fix I use: git config --global user.email "[email protected]" and works.

user.mail no work, need to put an E. Typo maybe?

Try making your constructor private like this:

private Foo newClass = new Foo();

Chain both class selectors (without a space in between):

.foo.bar {
    /* Styles for element(s) with foo AND bar classes */
}

If you still have to deal with ancient browsers like IE6, be aware that it doesn't read chained class selectors correctly: it'll only read the last class selector (.bar in this case) instead, regardless of what other classes you list.

To illustrate how other browsers and IE6 interpret this, consider this CSS:

* {
    color: black;
}

.foo.bar {
    color: red;
}

Output on supported browsers is:

<div class="foo">Hello Foo</div>       <!-- Not selected, black text [1] -->
<div class="foo bar">Hello World</div> <!-- Selected, red text [2] -->
<div class="bar">Hello Bar</div>       <!-- Not selected, black text [3] -->

Output on IE6 is:

<div class="foo">Hello Foo</div>       <!-- Not selected, black text [1] -->
<div class="foo bar">Hello World</div> <!-- Selected, red text [2] -->
<div class="bar">Hello Bar</div>       <!-- Selected, red text [2] -->

Footnotes:

• Supported browsers:
  1. Not selected as this element only has class foo.
  2. Selected as this element has both classes foo and bar.
  3. Not selected as this element only has class bar.
     
     
• IE6:
  1. Not selected as this element doesn't have class bar.
  2. Selected as this element has class bar, regardless of any other classes listed.

I had the same problem, I'm using a AfterViewChecked and @ViewChild combination (Angular2 beta.3).

The Component:

import {..., AfterViewChecked, ElementRef, ViewChild, OnInit} from 'angular2/core'
@Component({
    ...
})
export class ChannelComponent implements OnInit, AfterViewChecked {
    @ViewChild('scrollMe') private myScrollContainer: ElementRef;

    ngOnInit() { 
        this.scrollToBottom();
    }

    ngAfterViewChecked() {        
        this.scrollToBottom();        
    } 

    scrollToBottom(): void {
        try {
            this.myScrollContainer.nativeElement.scrollTop = this.myScrollContainer.nativeElement.scrollHeight;
        } catch(err) { }                 
    }
}

The Template:

<div #scrollMe style="overflow: scroll; height: xyz;">
    <div class="..." 
        *ngFor="..."
        ...>  
    </div>
</div>

Of course this is pretty basic. The AfterViewChecked triggers every time the view was checked:

Implement this interface to get notified after every check of your component's view.

If you have an input-field for sending messages for instance this event is fired after each keyup (just to give an example). But if you save whether the user scrolled manually and then skip the scrollToBottom() you should be fine.

how about simply:

import os
os.system('dir c:\\')

Change the adapter type in VirtualBox to bridged, and set the guest to use DHCP or set a static IP address outside of the bounds of DHCP. This will cause the Virtual Machine to act like a normal guest on your home network. You can then port forward.

def f(a,b):
    return a+b

xx = 'f'
print eval('%s(%s,%s)'%(xx,2,3))

OUTPUT

 5

in the "Ouput Window". you can usually do CTRL-ALT-O to make it visible. Or through menus using View->Output.

As it is described at decimal as:

The decimal keyword indicates a 128-bit data type. Compared to floating-point types, the decimal type has more precision and a smaller range, which makes it appropriate for financial and monetary calculations.

You can use a decimal as follows:

decimal myMoney = 300.5m;

Omit the "~\":

var path = @"FolderIcon\Folder.ico";

~\ doesn't mean anything in terms of the file system. The only place I've seen that correctly used is in a web app, where ASP.NET replaces the tilde with the absolute path to the root of the application.

You can typically assume the paths are relative to the folder where the EXE is located. Also, make sure that the image is specified as "content" and "copy if newer"/"copy always" in the properties tab in Visual Studio.

why not use Boost.StringAlgo:

#include <boost/algorithm/string/find.hpp>

bool Foo()
{
   //case insensitive find

   std::string str("Hello");

   boost::iterator_range<std::string::const_iterator> rng;

   rng = boost::ifind_first(str, std::string("EL"));

   return rng;
}

uniq has the option you need:

   -u, --unique
          only print unique lines

$ cat file.txt
1
1
2
3
5
5
7
7
$ uniq -u file.txt
2
3

You can (but don't need to because the ViewHolder class is not static) create field context as is shown below:

private final Context context;

public MyViewHolder(View itemView) {
    super(itemView);
    context = itemView.getContext();
    ...
}

and on your onClick method just call sth like below:

@Override
public void onClick(View v) {          

    final Intent intent;
    switch (getAdapterPostion()){
        case 0:
           intent =  new Intent(context, FirstActivity.class);
           break;

        case 1:
            intent =  new Intent(context, SecondActivity.class);
            break;
           ...
        default:
           intent =  new Intent(context, DefaultActivity.class);
           break;
     }
    context.startActivity(intent);
}

or

@Override
public void onClick(View v) {          

    final Intent intent;
    if (getAdapterPosition() == sth){
       intent =  new Intent(context, OneActivity.class);
    } else if (getPosition() == sth2){
       intent =  new Intent(context, SecondActivity.class);
    } else {
       intent =  new Intent(context, DifferentActivity.class);
    }
    context.startActivity(intent);
}

The following script would obtain the ci.jenkins-ci.org public key certificate in base64-encoded DER format and convert it to an OpenSSH public key file. This code assumes that a 2048-bit RSA key is used and draws a lot from this Ian Boyd's answer. I've explained a bit more how it works in comments to this article in Jenkins wiki.

echo -n "ssh-rsa " > jenkins.pub
curl -sfI https://ci.jenkins-ci.org/ | grep -i X-Instance-Identity | tr -d \\r | cut -d\  -f2 | base64 -d | dd bs=1 skip=32 count=257 status=none | xxd -p -c257 | sed s/^/00000007\ 7373682d727361\ 00000003\ 010001\ 00000101\ / | xxd -p -r | base64 -w0 >> jenkins.pub
echo >> jenkins.pub

Unable to load Client Print Control!
Everytime, clients wanted to print report by clicking the button print on their report viewer, they always got this error message.

I had spent nearly two weeks to fix this problem.
My environment is:
- Window Server 2003 Standard Edition R2
- Report Server Version 10.X.X.X
- Clients with windowXP SP3
My Solution is:
- Replacing the CAP file (RSClientPrint-x86.cab) in C\Program Files\Microsoft SQL
Server\MSRS10.MSSQLSERVER\Reporting Services\ReportServer\bin\
- Extract the RSClientPrint-x86.cab and destribute it to clients.


Hear is the CAB file: https://sites.google.com/site/narithsite/Home/RSClientPrint-x86.cab?attredirects=0&d=1

Here is my solution:

chrome.runtime.onMessage.addListener(function(request, sender) {
        if (request.action == "getSource") {
            this.pageSource = request.source;
            var title = this.pageSource.match(/<title[^>]*>([^<]+)<\/title>/)[1];
            alert(title)
        }
    });

    chrome.tabs.query({ active: true, currentWindow: true }, tabs => {
        chrome.tabs.executeScript(
            tabs[0].id,
            { code: 'var s = document.documentElement.outerHTML; chrome.runtime.sendMessage({action: "getSource", source: s});' }
        );
    });

I have answered this question here..Covariant virtual functions return type problem

See if it helps for some one.

Just to complete it:

(gdb) p (char[10]) *($ebx)
$87 =   "asdfasdfe\n"

You must give a length, but may change the representation of that string:

(gdb) p/x (char[10]) *($ebx)
$90 =   {0x61,
  0x73,
  0x64,
  0x66,
  0x61,
  0x73,
  0x64,
  0x66,
  0x65,
  0xa}

This may be useful if you want to debug by their values

In the extreme case of not knowing which callback is attached to a window listener, an handler can be wrapper around window addEventListener and a variable can store ever listeners to properly remove each one of those through a removeAllEventListener('scroll') for example.

var listeners = {};

var originalEventListener = window.addEventListener;
window.addEventListener = function(type, fn, options) {
    if (!listeners[type])
        listeners[type] = [];

    listeners[type].push(fn);
    return originalEventListener(type, fn, options);
}

var removeAllEventListener = function(type) {
    if (!listeners[type] || !listeners[type].length)
        return;

    for (let i = 0; i < listeners[type].length; i++)
        window.removeEventListener(type, listeners[type][i]);
}

As a matter of safety, you may wish to check that the element exists before you attempt to read from it. If it doesn't exist, your code will throw an exception, which will stop execution on the rest of your JavaScript and potentially display an error message to the user -- not good. You want to be able to fail gracefully.

var height, width, top, margin, item;
item = document.getElementById( "image_1" );
if( item ) {
  height = item.style.height;
  width = item.style.width;
  top = item.style.top;
  margin = item.style.margin;
} else {
  // Fail gracefully here
}

onkeyup worked for me. onkeypress doesn't trigger when pressing back space.

I had the same problem: I love the resolve object, but that only works for the content of ng-view. What if you have controllers (for top-level nav, let's say) that exist outside of ng-view and which need to be initialized with data before the routing even begins to happen? How do we avoid mucking around on the server-side just to make that work?

Use manual bootstrap and an angular constant. A naiive XHR gets you your data, and you bootstrap angular in its callback, which deals with your async issues. In the example below, you don't even need to create a global variable. The returned data exists only in angular scope as an injectable, and isn't even present inside of controllers, services, etc. unless you inject it. (Much as you would inject the output of your resolve object into the controller for a routed view.) If you prefer to thereafter interact with that data as a service, you can create a service, inject the data, and nobody will ever be the wiser.

Example:

//First, we have to create the angular module, because all the other JS files are going to load while we're getting data and bootstrapping, and they need to be able to attach to it.
var MyApp = angular.module('MyApp', ['dependency1', 'dependency2']);

// Use angular's version of document.ready() just to make extra-sure DOM is fully 
// loaded before you bootstrap. This is probably optional, given that the async 
// data call will probably take significantly longer than DOM load. YMMV.
// Has the added virtue of keeping your XHR junk out of global scope. 
angular.element(document).ready(function() {

    //first, we create the callback that will fire after the data is down
    function xhrCallback() {
        var myData = this.responseText; // the XHR output

        // here's where we attach a constant containing the API data to our app 
        // module. Don't forget to parse JSON, which `$http` normally does for you.
        MyApp.constant('NavData', JSON.parse(myData));

        // now, perform any other final configuration of your angular module.
        MyApp.config(['$routeProvider', function ($routeProvider) {
            $routeProvider
              .when('/someroute', {configs})
              .otherwise({redirectTo: '/someroute'});
          }]);

        // And last, bootstrap the app. Be sure to remove `ng-app` from your index.html.
        angular.bootstrap(document, ['NYSP']);
    };

    //here, the basic mechanics of the XHR, which you can customize.
    var oReq = new XMLHttpRequest();
    oReq.onload = xhrCallback;
    oReq.open("get", "/api/overview", true); // your specific API URL
    oReq.send();
})

Now, your NavData constant exists. Go ahead and inject it into a controller or service:

angular.module('MyApp')
    .controller('NavCtrl', ['NavData', function (NavData) {
        $scope.localObject = NavData; //now it's addressable in your templates 
}]);

Of course, using a bare XHR object strips away a number of the niceties that $http or JQuery would take care of for you, but this example works with no special dependencies, at least for a simple get. If you want a little more power for your request, load up an external library to help you out. But I don't think it's possible to access angular's $http or other tools in this context.

(SO related post)

Quick and dirty way:

<View
    android:id="@+id/colored_bar"
    android:layout_width="48dp"
    android:layout_height="3dp"
    android:background="@color/bar_red" />

Try this:

lst = [("aaaa8"),("bb8"),("ccc8"),("dddddd8")]
print([s.strip('8') for s in lst]) # remove the 8 from the string borders
print([s.replace('8', '') for s in lst]) # remove all the 8s 

Short and simple answer for that,

Gradle is a build system, which is responsible for code compilation, testing, deployment and conversion of the code into . dex files and hence running the app on the device. As Android Studio comes with Gradle system pre-installed, there is no need to install additional runtime softwares to build our project.

You don't need to go to 64-bit to see something like this. Consider int32_t on common 32-bit platforms. It might be typedef'ed as int or as a long, but obviously only one of the two at a time. int and long are of course distinct types.

It's not hard to see that there is no workaround which makes int == int32_t == long on 32-bit systems. For the same reason, there's no way to make long == int64_t == long long on 64-bit systems.

If you could, the possible consequences would be rather painful for code that overloaded foo(int), foo(long) and foo(long long) - suddenly they'd have two definitions for the same overload?!

The correct solution is that your template code usually should not be relying on a precise type, but on the properties of that type. The whole same_type logic could still be OK for specific cases:

long foo(long x);
std::tr1::disable_if(same_type(int64_t, long), int64_t)::type foo(int64_t);

I.e., the overload foo(int64_t) is not defined when it's exactly the same as foo(long).

[edit] With C++11, we now have a standard way to write this:

long foo(long x);
std::enable_if<!std::is_same<int64_t, long>::value, int64_t>::type foo(int64_t);

[edit] Or C++20

long foo(long x);
int64_t foo(int64_t) requires (!std::is_same_v<int64_t, long>);

You have multiple options. Two options are the following.

numpy.sum(boolarr)
numpy.count_nonzero(boolarr)

Here's an example:

>>> import numpy as np
>>> boolarr = np.array([[0, 0, 1], [1, 0, 1], [1, 0, 1]], dtype=np.bool)
>>> boolarr
array([[False, False,  True],
       [ True, False,  True],
       [ True, False,  True]], dtype=bool)

>>> np.sum(boolarr)
5

Of course, that is a bool-specific answer. More generally, you can use numpy.count_nonzero.

>>> np.count_nonzero(boolarr)
5

This solution has the benefit of showing the URL of the linked-to page on hover, as most browsers do by default, instead of history.go(-1) or similar:

<script>
    document.write('<a href="' + document.referrer + '">Go Back</a>');
</script>

There is obviously another process listening on the port. You might find out that process by using the following command:

$ lsof -i :8000

or change your tornado app's port. tornado's error info not Explicitly on this.

Every time you use html syntax you have to start the next razor statement with a @. So it should be @if ....

There's 2 likely reasons that a TaskCanceledException would be thrown:

1. Something called Cancel() on the CancellationTokenSource associated with the cancellation token before the task completed.
2. The request timed out, i.e. didn't complete within the timespan you specified on HttpClient.Timeout.

My guess is it was a timeout. (If it was an explicit cancellation, you probably would have figured that out.) You can be more certain by inspecting the exception:

try
{
    var response = task.Result;
}
catch (TaskCanceledException ex)
{
    // Check ex.CancellationToken.IsCancellationRequested here.
    // If false, it's pretty safe to assume it was a timeout.
}

I know this is an old post but i want to share my experience.

HTML:

<input type="text" placeholder="Username or E-Mail" required data-required-message="E-Mail or Username is Required!">

Javascript (jQuery):

$('input[required]').on('invalid', function() {
    this.setCustomValidity($(this).data("required-message"));
});

This is a very simple sample. I hope this can help to anyone.

if you want to upgrade only a single column of a table row then you can use as following:

$this->db->set('column_header', $value); //value that used to update column  
$this->db->where('column_id', $column_id_value); //which row want to upgrade  
$this->db->update('table_name');  //table name

Calendar c = Calendar.getInstance();
int month=c.get(Calendar.MONTH)+1;
String sDate = c.get(Calendar.YEAR) + "-" + month+ "-" + c.get(Calendar.DAY_OF_MONTH) +
"T" + c.get(Calendar.HOUR_OF_DAY)+":"+c.get(Calendar.MINUTE)+":"+c.get(Calendar.SECOND);

This will give date time format like 2010-05-24T18:13:00

impossible with javascript. Just as another alternative to suggestions from other answers: consider using jGrowl: http://archive.plugins.jquery.com/project/jGrowl

Use ANSI syntax and it will be a lot more clear how you are joining the tables:

SELECT s.name as Student, c.name as Course 
FROM student s
    INNER JOIN bridge b ON s.id = b.sid
    INNER JOIN course c ON b.cid  = c.id 
ORDER BY s.name 

If you use alternatives to manage multiple java versions, you can set the JAVA_HOME based on the symlinked java (or javac) like this:

export JAVA_HOME=$(readlink -f /usr/bin/java | sed "s:bin/java::")

Just a word on drawing (incorrect) conclusions from any of the performance measurement commands referred to in the answers. There are a number of pitfalls that should taken in consideration aside from looking to the bare invocation time of a (custom) function or command.

Sjoemelsoftware

_{'Sjoemelsoftware' voted Dutch word of the year 2015
Sjoemelen means cheating, and the word sjoemelsoftware came into being due to the Volkswagen emissions scandal. The official definition is "software used to influence test results".}

Personally, I think that "Sjoemelsoftware" is not always deliberately created to cheat test results but might originate from accommodating practical situation that are similar to test cases as shown below.

As an example, using the listed performance measurement commands, Language Integrated Query (LINQ)⁽¹⁾, is often qualified as the fasted way to get something done and it often is, but certainly not always! Anybody who measures a speed increase of a factor 40 or more in comparison with native PowerShell commands, is probably incorrectly measuring or drawing an incorrect conclusion.

The point is that some .Net classes (like LINQ) using a lazy evaluation (also referred to as deferred execution⁽²⁾). Meaning that when assign an expression to a variable, it almost immediately appears to be done but in fact it didn't process anything yet!

Let presume that you dot-source your . .\Dosomething.ps1 command which has either a PowerShell or a more sophisticated Linq expression (for the ease of explanation, I have directly embedded the expressions directly into the Measure-Command):

$Data = @(1..100000).ForEach{[PSCustomObject]@{Index=$_;Property=(Get-Random)}}

(Measure-Command {
    $PowerShell = $Data.Where{$_.Index -eq 12345}
}).totalmilliseconds
864.5237

(Measure-Command {
    $Linq = [Linq.Enumerable]::Where($Data, [Func[object,bool]] { param($Item); Return $Item.Index -eq 12345})
}).totalmilliseconds
24.5949

The result appears obvious, the later Linq command is a about 40 times faster than the first PowerShell command. Unfortunately, it is not that simple...

Let's display the results:

PS C:\> $PowerShell

Index  Property
-----  --------
12345 104123841

PS C:\> $Linq

Index  Property
-----  --------
12345 104123841

As expected, the results are the same but if you have paid close attention, you will have noticed that it took a lot longer to display the $Linq results then the $PowerShell results.
Let's specifically measure that by just retrieving a property of the resulted object:

PS C:\> (Measure-Command {$PowerShell.Property}).totalmilliseconds
14.8798
PS C:\> (Measure-Command {$Linq.Property}).totalmilliseconds
1360.9435

It took about a factor 90 longer to retrieve a property of the $Linq object then the $PowerShell object and that was just a single object!

Also notice an other pitfall that if you do it again, certain steps might appear a lot faster then before, this is because some of the expressions have been cached.

Bottom line, if you want to compare the performance between two functions, you will need to implement them in your used case, start with a fresh PowerShell session and base your conclusion on the actual performance of the complete solution.

_{(1) For more background and examples on PowerShell and LINQ, I recommend tihis site: High Performance PowerShell with LINQ
(2) I think there is a minor difference between the two concepts as with lazy evaluation the result is calculated when needed as apposed to deferred execution were the result is calculated when the system is idle}

The best thing is to go to your phpmyadmin folder and open config.inc.php and change allownopassword=false to $cfg['Servers'][$i]['AllowNoPassword'] = true;

I found a really cool library, try this out. this is really smooth and easy to use.

https://github.com/TakuSemba/CropMe

you can use JsonConvert.SerializeObject()

JsonConvert.SerializeObject(myObject) // myObject is returned by JObject.Parse() method

JsonConvert.SerializeObject()

JObject.Parse()

var secondEmails = (from item in list2
                    select new { Email = item.Email }
                   ).ToList();

var matches = from item in list1
              where !secondEmails.Contains(item.Email)
              select new {Email = item.Email};

I also tried deleting the database again, called update-database and then add-migration. I ended up with an additional migration that seems not to change anything (see below)

Based on above details, I think you have done last thing first. If you run Update database before Add-migration, it won't update the database with your migration schemas. First you need to add the migration and then run update command.

Try them in this order using package manager console.

PM> Enable-migrations //You don't need this as you have already done it
PM> Add-migration Give_it_a_name
PM> Update-database

Further to what Steve Baker has said, you can find a description of the SIOCGIFCONF ioctl in the netdevice(7) man page.

Once you have the list of all the IP addresses on the host, you will have to use application specific logic to filter out the addresses you do not want and hope you have one IP address left.

I had this same problem using curl to send a soap request. Solved it by adding "content-type: text/xml" to the http header.

I hope this helps someone.

Step 1:

Locate phpMyAdmin installation path.

Step 2:

Open phpMyAdmin/config.inc.php in your favourite text editor. Copy config.sample.inc.php to config.inc.php if it's missing.

Step 3:

Search for $cfg['Servers'][$i]['auth_type'] = 'config';

Replace it with $cfg['Servers'][$i]['auth_type'] = 'cookie';

I don't like adding new package into my project just to handle this simple task.

And also, I try my best to avoid RECURSIVE algorithm.... since, for most cases it is slower compared to non Recursive one.

So I made a function to get all the folder content (and its sub folder).... NON-Recursively

var getDirectoryContent = function(dirPath) {
    /* 
        get list of files and directories from given dirPath and all it's sub directories
        NON RECURSIVE ALGORITHM
        By. Dreamsavior
    */
    var RESULT = {'files':[], 'dirs':[]};

    var fs = fs||require('fs');
    if (Boolean(dirPath) == false) {
        return RESULT;
    }
    if (fs.existsSync(dirPath) == false) {
        console.warn("Path does not exist : ", dirPath);
        return RESULT;
    }

    var directoryList = []
    var DIRECTORY_SEPARATOR = "\\";
    if (dirPath[dirPath.length -1] !== DIRECTORY_SEPARATOR) dirPath = dirPath+DIRECTORY_SEPARATOR;

    directoryList.push(dirPath); // initial

    while (directoryList.length > 0) {
        var thisDir  = directoryList.shift(); 
        if (Boolean(fs.existsSync(thisDir) && fs.lstatSync(thisDir).isDirectory()) == false) continue;

        var thisDirContent = fs.readdirSync(thisDir);
        while (thisDirContent.length > 0) { 
            var thisFile  = thisDirContent.shift(); 
            var objPath = thisDir+thisFile

            if (fs.existsSync(objPath) == false) continue;
            if (fs.lstatSync(objPath).isDirectory()) { // is a directory
                let thisDirPath = objPath+DIRECTORY_SEPARATOR; 
                directoryList.push(thisDirPath);
                RESULT['dirs'].push(thisDirPath);

            } else  { // is a file
                RESULT['files'].push(objPath); 

            } 
        } 

    }
    return RESULT;
}

the only drawback of this function is that this is Synchronous function... You have been warned ;)

Following answer can help in this and other similar situations like synchronous AJAX call -

Working example

waitForMe().then(function(intentsArr){
  console.log('Finally, I can execute!!!');
},
function(err){
  console.log('This is error message.');
})

function waitForMe(){
    // Returns promise
    console.log('Inside waitForMe');
    return new Promise(function(resolve, reject){
        if(true){ // Try changing to 'false'
            setTimeout(function(){
                console.log('waitForMe\'s function succeeded');
                resolve();
            }, 2500);
        }
        else{
            setTimeout(function(){
                console.log('waitForMe\'s else block failed');
                resolve();
            }, 2500);
        }
    });
}

function domify (str) {
  var el = document.createElement('div');
  el.innerHTML = str;

  var frag = document.createDocumentFragment();
  return frag.appendChild(el.removeChild(el.firstChild));
}

var str = "<div class='foo'>foo</div>";
domify(str);

There is a jQuery solution in this thread. Try something like this:

var decoded = $("<div/>").html('your string').text();

This sets the innerHTML of a new <div> element (not appended to the page), causing jQuery to decode it into HTML, which is then pulled back out with .text().

Also instead of adding each file manually, we could do something like:

git add --all

OR

git add -A

This will also remove any files not present or deleted (Tracked files in the current working directory which are now absent).

If you only want to add files which are tracked and have changed, you would want to do

git add -u

What is the difference between git add . & git add --all?

in phpmyadmin

note: this will work if you delete last rows not middle rows.

goto your table-> click on operations menu-> goto table options->change AUTO_INCREMENT to that no from where you want to start.

your table autoincrement start from that no.

try it.

On the windows platform, I met that problem too The solution for me is just add

C:\Windows\System32

to the PATH

and restart the computer.

Text will never wrap to the next line. The text continues on the same line until a
tag is encountered.

.dropdown-menu {
    white-space: nowrap;
}

A[A==NDV]=numpy.nan

A==NDV will produce a boolean array that can be used as an index for A

There is a PPA with up-to-date versions of Ruby 2.x for Ubuntu 12.04+:

$ sudo apt-add-repository ppa:brightbox/ruby-ng
$ sudo apt-get update
$ sudo apt-get install ruby2.4

$ ruby -v
ruby 2.4.1p111 (2017-03-22 revision 58053) [x86_64-linux-gnu]

In my experience, you'll see a status of 0 when:

• doing cross-site scripting (where access is denied)
• requesting a URL that is unreachable (typo, DNS issues, etc)
• the request is otherwise intercepted (check your ad blocker)
• as above, if the request is interrupted (browser navigates away from the page)

there is one of the best solution do resolve this problem and it is going to work 100%. as we know that server is a process so treat it like a process go to the task manager in windows and see for services in task manager in that service see for Mysql and MS80 and try to start it manually by click on it and say run then will take some time.

go to your mysql workbench and click on start/shutdown then try to refresh the server status in server status option. it will load up thats it.

You can use your own isEmpty (for multiple collection) method too. Add this your Util class.

public static boolean isEmpty(Collection... collections) {
    for (Collection collection : collections) {
        if (null == collection || collection.isEmpty())
            return true;
    }
    return false;
}

you can use the below command on terminal

export LC_ALL=C

^{Note: The command in the question uses Start-Process, which prevents direct capturing of the target program's output. Generally, do not use Start-Process to execute console applications synchronously - just invoke them directly, as in any shell. Doing so keeps the application connected to the calling console's standard streams, allowing its output to be captured by simple assignment $output = netdom ..., as detailed below.}

Fundamentally, capturing output from external programs works the same as with PowerShell-native commands (you may want a refresher on how to execute external programs; <command> is a placeholder for any valid command below):

$cmdOutput = <command>   # captures the command's success stream / stdout output

Note that $cmdOutput receives an array of objects if <command> produces more than 1 output object, which in the case of an external program means a string^[1] array containing the program's output lines.

If you want to make sure that the result is always an array - even if only one object is output, type-constrain the variable as an array, or wrap the command in @(), the array-subexpression operator):

[array] $cmdOutput = <command> # or: $cmdOutput = @(<command>)

By contrast, if you want $cmdOutput to always receive a single - potentially multi-line - string, use Out-String, though note that a trailing newline is invariably added:

# Note: Adds a trailing newline.
$cmdOutput = <command> | Out-String

With calls to external programs - which by definition only ever return strings in PowerShell^[1] - you can avoid that by using the -join operator instead:

# NO trailing newline.
$cmdOutput = (<command>) -join "`n"

Note: For simplicity, the above uses "`n" to create Unix-style LF-only newlines, which PowerShell happily accepts on all platforms; if you need platform-appropriate newlines (CRLF on Windows, LF on Unix), use [Environment]::NewLine instead.

To capture output in a variable and print to the screen:

<command> | Tee-Object -Variable cmdOutput # Note how the var name is NOT $-prefixed

Or, if <command> is a cmdlet or advanced function, you can use common parameter
-OutVariable / -ov:

<command> -OutVariable cmdOutput   # cmdlets and advanced functions only

Note that with -OutVariable, unlike in the other scenarios, $cmdOutput is always a collection, even if only one object is output. Specifically, an instance of the array-like [System.Collections.ArrayList] type is returned.
See this GitHub issue for a discussion of this discrepancy.

To capture the output from multiple commands, use either a subexpression ($(...)) or call a script block ({ ... }) with & or .:

$cmdOutput = $(<command>; ...)  # subexpression

$cmdOutput = & {<command>; ...} # script block with & - creates child scope for vars.

$cmdOutput = . {<command>; ...} # script block with . - no child scope

Note that the general need to prefix with & (the call operator) an individual command whose name/path is quoted - e.g., $cmdOutput = & 'netdom.exe' ... - is not related to external programs per se (it equally applies to PowerShell scripts), but is a syntax requirement: PowerShell parses a statement that starts with a quoted string in expression mode by default, whereas argument mode is needed to invoke commands (cmdlets, external programs, functions, aliases), which is what & ensures.

The key difference between $(...) and & { ... } / . { ... } is that the former collects all input in memory before returning it as a whole, whereas the latter stream the output, suitable for one-by-one pipeline processing.

Redirections also work the same, fundamentally (but see caveats below):

$cmdOutput = <command> 2>&1 # redirect error stream (2) to success stream (1)

However, for external commands the following is more likely to work as expected:

$cmdOutput = cmd /c <command> '2>&1' # Let cmd.exe handle redirection - see below.

Considerations specific to external programs:

• External programs, because they operate outside PowerShell's type system, only ever return strings via their success stream (stdout); similarly, PowerShell only ever sends strings to external programs via the pipeline.^[1]

  • Character-encoding issues can therefore come into play:

    • On sending data via the pipeline to external programs, PowerShell uses the encoding stored in the $OutVariable preference variable; which in Windows PowerShell defaults to ASCII(!) and in PowerShell [Core] to UTF-8.

    • On receiving data from an external program, PowerShell uses the encoding stored in [Console]::OutputEncoding to decode the data, which in both PowerShell editions defaults to the system's active OEM code page.

    • See this answer for more information; this answer discusses the still-in-beta (as of this writing) Windows 10 feature that allows you to set UTF-8 as both the ANSI and the OEM code page system-wide.

• If the output contains more than 1 line, PowerShell by default splits it into an array of strings. More accurately, the output lines are stored in an array of type [System.Object[]] whose elements are strings ([System.String]).

• If you want the output to be a single, potentially multi-line string, use the -join operator (you can alternatively pipe to Out-String, but that invariably adds a trailing newline):
  $cmdOutput = (<command>) -join [Environment]::NewLine

• Merging stderr into stdout with 2>&1, so as to also capture it as part of the success stream, comes with caveats:

  • To do this at the source, let cmd.exe handle the redirection, using the following idioms (works analogously with sh on Unix-like platforms):
    $cmdOutput = cmd /c <command> '2>&1' # *array* of strings (typically)
$cmdOutput = (cmd /c <command> '2>&1') -join "`r`n" # single string

    • cmd /c invokes cmd.exe with command <command> and exits after <command> has finished.

    • Note the single quotes around 2>&1, which ensures that the redirection is passed to cmd.exe rather than being interpreted by PowerShell.

    • Note that involving cmd.exe means that its rules for escaping characters and expanding environment variables come into play, by default in addition to PowerShell's own requirements; in PS v3+ you can use special parameter --% (the so-called stop-parsing symbol) to turn off interpretation of the remaining parameters by PowerShell, except for cmd.exe-style environment-variable references such as %PATH%.

    • Note that since you're merging stdout and stderr at the source with this approach, you won't be able to distinguish between stdout-originated and stderr-originated lines in PowerShell; if you do need this distinction, use PowerShell's own 2>&1 redirection - see below.

  • Use PowerShell's 2>&1 redirection to know which lines came from what stream:

    • Stderr output is captured as error records ([System.Management.Automation.ErrorRecord]), not strings, so the output array may contain a mix of strings (each string representing a stdout line) and error records (each record representing a stderr line). Note that, as requested by 2>&1, both the strings and the error records are received through PowerShell's success output stream).

    • Note: The following only applies to Windows PowerShell - these problems have been corrected in PowerShell [Core] v6+, though the filtering technique by object type shown below ($_ -is [System.Management.Automation.ErrorRecord]) can also be useful there.

    • In the console, the error records print in red, and the 1st one by default produces multi-line display, in the same format that a cmdlet's non-terminating error would display; subsequent error records print in red as well, but only print their error message, on a single line.

    • When outputting to the console, the strings typically come first in the output array, followed by the error records (at least among a batch of stdout/stderr lines output "at the same time"), but, fortunately, when you capture the output, it is properly interleaved, using the same output order you would get without 2>&1; in other words: when outputting to the console, the captured output does NOT reflect the order in which stdout and stderr lines were generated by the external command.

    • If you capture the entire output in a single string with Out-String, PowerShell will add extra lines, because the string representation of an error record contains extra information such as location (At line:...) and category (+ CategoryInfo ...); curiously, this only applies to the first error record.

      • To work around this problem, apply the .ToString() method to each output object instead of piping to Out-String:
        $cmdOutput = <command> 2>&1 | % { $_.ToString() };
        in PS v3+ you can simplify to:
        $cmdOutput = <command> 2>&1 | % ToString
        (As a bonus, if the output isn't captured, this produces properly interleaved output even when printing to the console.)

      • Alternatively, filter the error records out and send them to PowerShell's error stream with Write-Error (as a bonus, if the output isn't captured, this produces properly interleaved output even when printing to the console):

$cmdOutput = <command> 2>&1 | ForEach-Object {
  if ($_ -is [System.Management.Automation.ErrorRecord]) {
    Write-Error $_
  } else {
    $_
  }
}

^{[1] As of PowerShell 7.1, PowerShell knows only strings when communicating with external programs. There is generally no concept of raw byte data in a PowerShell pipeline. If you want raw byte data returned from an external program, you must shell out to cmd.exe /c (Windows) or sh -c (Unix), save to a file there, then read that file in PowerShell. See this answer for more information.}

You can use [DisplayMatrics][1] and determine the screen density. Something like this:

int pixelsValue = 5; // margin in pixels
float d = context.getResources().getDisplayMetrics().density;
int margin = (int)(pixelsValue * d);

As I remember it's better to use flooring for offsets and rounding for widths.

I would do it like this using negative margins and calc for the gutters:

.parent {
  display: flex;
  flex-wrap: wrap;
  margin-top: -10px;
  margin-left: -10px;
}

.child {
  width: calc(25% - 10px);
  margin-left: 10px;
  margin-top: 10px;
}

Demo: https://jsfiddle.net/9j2rvom4/

Alternative CSS Grid Method:

.parent {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-column-gap: 10px;
  grid-row-gap: 10px;
}

Demo: https://jsfiddle.net/jc2utfs3/

Additionally, if it's a folder to be removed and it's subsequent child folders or files, use:

git rm -r foldername

In cooperation with Andy E, this is the dark side of the force:

var _old = jQuery.Event.prototype.stopPropagation;

jQuery.Event.prototype.stopPropagation = function() {
    this.target.nodeName !== 'SPAN' && _old.apply( this, arguments );
};     

Example: http://jsfiddle.net/M4teA/2/

Remember, if all the events were bound via jQuery, you can handle those cases just here. In this example, we just call the original .stopPropagation() if we are not dealing with a <span>.

You cannot prevent the prevent, no.

What you could do is, to rewrite those event handlers manually in-code. This is tricky business, but if you know how to access the stored handler methods, you could work around it. I played around with it a little, and this is my result:

$( document.body ).click(function() {
    alert('Hi I am bound to the body!');
});

$( '#bar' ).click(function(e) {
    alert('I am the span and I do prevent propagation');
    e.stopPropagation();
});

$( '#yay' ).click(function() {
    $('span').each(function(i, elem) {
        var events        = jQuery._data(elem).events,
            oldHandler    = [ ],
            $elem         = $( elem );

        if( 'click' in events ) {                        
            [].forEach.call( events.click, function( click ) {
                oldHandler.push( click.handler );
            });

            $elem.off( 'click' );
        }

        if( oldHandler.length ) {
            oldHandler.forEach(function( handler ) {
                $elem.bind( 'click', (function( h ) {
                    return function() {
                        h.apply( this, [{stopPropagation: $.noop}] );
                    };
                }( handler )));
            });
        }
    });

    this.disabled = 1;
    return false;
});

Example: http://jsfiddle.net/M4teA/

Notice, the above code will only work with jQuery 1.7. If those click events were bound with an earlier jQuery version or "inline", you still can use the code but you would need to access the "old handler" differently.

I know I'm assuming a lot of "perfect world" scenario things here, for instance, that those handles explicitly call .stopPropagation() instead of returning false. So it still might be a useless academic example, but I felt to come out with it :-)

edit: hey, return false; will work just fine, the event objects is accessed in the same way.

If you want to write all in one line try

new Select (driver.findElement(By.id("designation"))).selectByVisibleText("Programmer ");

$find="Topsite";
$list=array("Tope","Ajayi","Topsite","Infotech");
$list_count=count($list);
sort($list);
for($i=0;$i<$list_count;$i++)
{
    if($list[$i]==$find){
         $position=$i;
    }

}
echo $position;

There is a whole page in the MATLAB documentation dedicated to this topic: Array vs. Matrix Operations. The gist of it is below:

MATLAB® has two different types of arithmetic operations: array operations and matrix operations. You can use these arithmetic operations to perform numeric computations, for example, adding two numbers, raising the elements of an array to a given power, or multiplying two matrices.

Matrix operations follow the rules of linear algebra. By contrast, array operations execute element by element operations and support multidimensional arrays. The period character (.) distinguishes the array operations from the matrix operations. However, since the matrix and array operations are the same for addition and subtraction, the character pairs .+ and .- are unnecessary.

do it thru cmd -

echo %JAVA_HOME% set set JAVA_HOME=C:\Program Files\Java\jdk1.8.0 echo %JAVA_HOME%

Sorry, but I think you need two queries. One for total views and another one for grouped records.

You can find useful this answer

If you're on rails which utilizes Erubis — the coolest way to do it is

<%== @str >

Note the double equal sign. See related question on SO for more info.

I know there are multiple ways to achieve this as per solutions shared above. I haven't tried all of them but some third party services lack clarity around what are all tasks being run in the background. I have achieved this through a powershell script similar to the one mentioned as windows batch file. I have scheduled it using Windows Tasks Scheduler to run every minute. This has been quite efficient and transparent so far. The advantage I have here is that I am checking the process explicitly before starting it again. This wouldn't cause much overhead to the CPU on the server. Also you don't have to explicitly place the file into the startup folders.

function CheckNodeService ()
{

$node = Get-Process node -ErrorAction SilentlyContinue

if($node)
{
    echo 'Node Running'
}
else
{
    echo 'Node not Running'
    Start-Process "C:\Program Files\nodejs\node.exe" -ArgumentList "app.js" -WorkingDirectory "E:\MyApplication"
    echo 'Node started'

}
}

CheckNodeService

This should solve your problem, you should try to run the following below:

Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser 

  function CheckImageLoadingState()
  {
     var counter = 0;
     var length = 0;

     jQuery('#siteContent img').each(function() 
     {
        if(jQuery(this).attr('src').match(/(gif|png|jpg|jpeg)$/))
          length++;
     });

     jQuery('#siteContent img').each(function() 
     {  
        if(jQuery(this).attr('src').match(/(gif|png|jpg|jpeg)$/))
        {
           jQuery(this).load(function() 
           {
           }).each(function() {
              if(this.complete) jQuery(this).load();
            });
        }
        jQuery(this).load(function()
        {
           counter++;
           if(counter === length) 
           {  
              //function to call when all the images have been loaded
              DisplaySiteContent();
           }
        });
     });
  }

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 got this error when trying to install a python package in a Docker container. For me, the issue was that the docker image did not have a locale configured. Adding the following code to the Dockerfile solved the problem for me.

# Avoid ascii errors when reading files in Python
RUN apt-get install -y locales && locale-gen en_US.UTF-8
ENV LANG='en_US.UTF-8' LANGUAGE='en_US:en' LC_ALL='en_US.UTF-8'

Just use div { padding: 20px; } and substract 40px from your original div width.

Like Philip Wills pointed out, you can also use box-sizing instead of substracting 40px:

div {
    padding: 20px;
    -moz-box-sizing: border-box; 
    box-sizing: border-box;
}

The -moz-box-sizing is for Firefox.

As of OS X 10.10.1 (Yosemite), the location of the cacerts file has been changed to

$(/usr/libexec/java_home)/jre/lib/security/cacerts

if android version is above kitkat you may use this as well

public void onClick(View view) {

    Context context = getApplicationContext(); // add this line
    if (Build.VERSION_CODES.KITKAT <= Build.VERSION.SDK_INT) {
        ((ActivityManager) context.getSystemService(ACTIVITY_SERVICE))
            .clearApplicationUserData();
        return;
    }

Format your java.util.Date first. Then use the formatted date to get the date in java.sql.Date

java.util.Date utilDate = "Your date"
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
final String stringDate= dateFormat.format(utilDate);
final java.sql.Date sqlDate=  java.sql.Date.valueOf(stringDate);

There is no single simple way to do it, because PostgreSQL might be installed and set up in many different ways:

• Installed from source in a user home directory
• Installed from source into /opt or /usr/local, manually started or started by an init script
• Installed from distributor rpm / deb packages and started via init script
• Installed from 3rd party rpm / deb packages and started via init script
• Installed from packages but not set to start
• Client installed, connecting to a server on a different computer
• Installed and running but not on the default PATH or default port

You can't rely on psql being on the PATH. You can't rely on there being only one psql on the system (multiple versions might be installed in different ways). You can't do it based on port, as there's no guarantee it's on port 5432, or that there aren't multiple versions.

Prompt the user and ask them.

function convertToReadableSize($size)
{
  $base = log($size) / log(1024);
  $suffix = array("B", "KB", "MB", "GB", "TB");
  $f_base = floor($base);
  return round(pow(1024, $base - floor($base)), 1) . $suffix[$f_base];
}

Just call the function

echo convertToReadableSize(1024); // Outputs '1KB'
echo convertToReadableSize(1024 * 1024); // Outputs '1MB'

I fixed the issue for me by opening the Android SDK Manager and installing the build tools for all 23.x.x versions.

See the screenshot.

Few answers suggesting python 3.x or pthon 2.x , Below code will work for both.

 p = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT,)
    stdout = []
    while True:
        line = p.stdout.readline()
        if not isinstance(line, (str)):
            line = line.decode('utf-8')
        stdout.append(line)
        print (line)
        if (line == '' and p.poll() != None):
            break

In the latest version of Node.js (12.10.0 or later), the rmdir style functions fs.rmdir(), fs.rmdirSync(), and fs.promises.rmdir() have a new experimental option recursive that allows deleting non-empty directories, e.g.

fs.rmdir(path, { recursive: true });

The related PR on GitHub: https://github.com/nodejs/node/pull/29168

You can populate your document with <br> tags and turn them on\off with css just like any others:

<style>
.hideBreaks {
 display:none;
}
</style>
<html>
just a text line<br class='hideBreaks'> for demonstration
</html>

You should use getBoundingClientRect as it usually works cross browser and gives you sub-pixel precision on the bounds rectangle.

elem.getBoundingClientRect()

For anyone who may be interested, another approach is using @media queries to scale the buttons on different viewport widths..

Demo: http://bootply.com/93706

Answers here mostly focus on short way to fix it, but if that does not help, I'll give some steps to check, that helped me (Linux only):

• If the linker errors happen when linking other libraries, build those libs with debug symbols ("-g" GCC flag)

• List the symbols in the library and grep the symbols that linker complains about (enter the commands in command line):

  nm lib_your_problem_library.a | grep functionNameLinkerComplainsAbout

• If you got the method signature, proceed to the next step, if you got no symbols instead, mostlikely you stripped off all the symbols from the library and that is why linker can't find them when linking the library. Rebuild the library without stripping ALL the symbols, you can strip debug (strip -S option) symbols if you need.

• Use a c++ demangler to understand the method signature, for example, this one

• Compare the method signature in the library that you just got with the one you are using in code (check header file as well), if they are different, use the proper header or the proper library or whatever other way you now know to fix it