When do I need to declare them myself?

The Rule of Three states that if you declare any of a

1. copy constructor
2. copy assignment operator
3. destructor

then you should declare all three. It grew out of the observation that the need to take over the meaning of a copy operation almost always stemmed from the class performing some kind of resource management, and that almost always implied that

• whatever resource management was being done in one copy operation probably needed to be done in the other copy operation and

• the class destructor would also be participating in management of the resource (usually releasing it). The classic resource to be managed was memory, and this is why all Standard Library classes that manage memory (e.g., the STL containers that perform dynamic memory management) all declare “the big three”: both copy operations and a destructor.

A consequence of the Rule of Three is that the presence of a user-declared destructor indicates that simple member wise copy is unlikely to be appropriate for the copying operations in the class. That, in turn, suggests that if a class declares a destructor, the copy operations probably shouldn’t be automatically generated, because they wouldn’t do the right thing. At the time C++98 was adopted, the significance of this line of reasoning was not fully appreciated, so in C++98, the existence of a user declared destructor had no impact on compilers’ willingness to generate copy operations. That continues to be the case in C++11, but only because restricting the conditions under which the copy operations are generated would break too much legacy code.

How can I prevent my objects from being copied?

Declare copy constructor & copy assignment operator as private access specifier.

class MemoryBlock
{
public:

//code here

private:
MemoryBlock(const MemoryBlock& other)
{
   cout<<"copy constructor"<<endl;
}

// Copy assignment operator.
MemoryBlock& operator=(const MemoryBlock& other)
{
 return *this;
}
};

int main()
{
   MemoryBlock a;
   MemoryBlock b(a);
}

In C++11 onwards you can also declare copy constructor & assignment operator deleted

class MemoryBlock
{
public:
MemoryBlock(const MemoryBlock& other) = delete

// Copy assignment operator.
MemoryBlock& operator=(const MemoryBlock& other) =delete
};


int main()
{
   MemoryBlock a;
   MemoryBlock b(a);
}

The constructor of your A object allocates another object dynamically and stores a pointer to that dynamically allocated object in a raw pointer.

For that scenario, you must define your own copy constructor , assignment operator and destructor. The compiler generated ones will not work correctly. (This is a corollary to the "Law of the Big Three": A class with any of destructor, assignment operator, copy constructor generally needs all 3).

You have defined your own destructor (and you mentioned creating a copy constructor), but you need to define both of the other 2 of the big three.

An alternative is to store the pointer to your dynamically allocated int[] in some other object that will take care of these things for you. Something like a vector<int> (as you mentioned) or a boost::shared_array<>.

To boil this down - to take advantage of RAII to the full extent, you should avoid dealing with raw pointers to the extent possible.

And since you asked for other style critiques, a minor one is that when you are deleting raw pointers you do not need to check for 0 before calling delete - delete handles that case by doing nothing so you don't have to clutter you code with the checks.

You can make the copy constructor private and provide no implementation:

private:
    SymbolIndexer(const SymbolIndexer&);

Or in C++11, explicitly forbid it:

SymbolIndexer(const SymbolIndexer&) = delete;

This answer is more like an addition and a slight modification to the answers above.

In some versions of Visual Studio (and possibly other compilers) there is a bug that is really annoying and doesn't make sense. So if you declare/define your swap function like this:

friend void swap(A& first, A& second) {

    std::swap(first.size, second.size);
    std::swap(first.arr, second.arr);

}

... the compiler will yell at you when you call the swap function:

This has something to do with a friend function being called and this object being passed as a parameter.

A way around this is to not use friend keyword and redefine the swap function:

void swap(A& other) {

    std::swap(size, other.size);
    std::swap(arr, other.arr);

}

This time, you can just call swap and pass in other, thus making the compiler happy:

After all, you don't need to use a friend function to swap 2 objects. It makes just as much sense to make swap a member function that has one other object as a parameter.

You already have access to this object, so passing it in as a parameter is technically redundant.

Keep in mind that the copy constructor limits the class type to that of the copy constructor. Consider the example:

// Need to clone person, which is type Person
Person clone = new Person(person);

This doesn't work if person could be a subclass of Person (or if Person is an interface). This is the whole point of clone, is that it can can clone the proper type dynamically at runtime (assuming clone is properly implemented).

Person clone = (Person)person.clone();

or

Person clone = (Person)SomeCloneUtil.clone(person); // See Bozho's answer

Now person can be any type of Person assuming that clone is properly implemented.

Here is the simplest and readable solution. With bashj (https://sourceforge.net/projects/bashj/), you would simply choose one of these lines:

#!/usr/bin/bash

W="Hello world!"
echo $W

R=130
G=60
B=190

echo u.colored($R,$G,$B,$W)

echo u.colored(255,127,0,$W)
echo u.red($W)
echo u.bold($W)
echo u.italic($W)

Y=u.yellow($W)
echo $Y
echo u.bold($Y)

256x256x256 colors are available if you have the color support in your terminal application.

First, a short description of $on(), $broadcast() and $emit():

• .$on(name, listener) - Listens for a specific event by a given name
• .$broadcast(name, args) - Broadcast an event down through the $scope of all children
• .$emit(name, args) - Emit an event up the $scope hierarchy to all parents, including the $rootScope

Based on the following HTML (see full example here):

<div ng-controller="Controller1">
    <button ng-click="broadcast()">Broadcast 1</button>
    <button ng-click="emit()">Emit 1</button>
</div>

<div ng-controller="Controller2">
    <button ng-click="broadcast()">Broadcast 2</button>
    <button ng-click="emit()">Emit 2</button>
    <div ng-controller="Controller3">
        <button ng-click="broadcast()">Broadcast 3</button>
        <button ng-click="emit()">Emit 3</button>
        <br>
        <button ng-click="broadcastRoot()">Broadcast Root</button>
        <button ng-click="emitRoot()">Emit Root</button>
    </div>
</div>

The fired events will traverse the $scopes as follows:

• Broadcast 1 - Will only be seen by Controller 1 $scope
• Emit 1 - Will be seen by Controller 1 $scope then $rootScope
• Broadcast 2 - Will be seen by Controller 2 $scope then Controller 3 $scope
• Emit 2 - Will be seen by Controller 2 $scope then $rootScope
• Broadcast 3 - Will only be seen by Controller 3 $scope
• Emit 3 - Will be seen by Controller 3 $scope, Controller 2 $scope then $rootScope
• Broadcast Root - Will be seen by $rootScope and $scope of all the Controllers (1, 2 then 3)
• Emit Root - Will only be seen by $rootScope

JavaScript to trigger events (again, you can see a working example here):

app.controller('Controller1', ['$scope', '$rootScope', function($scope, $rootScope){
    $scope.broadcastAndEmit = function(){
        // This will be seen by Controller 1 $scope and all children $scopes 
        $scope.$broadcast('eventX', {data: '$scope.broadcast'});

        // Because this event is fired as an emit (goes up) on the $rootScope,
        // only the $rootScope will see it
        $rootScope.$emit('eventX', {data: '$rootScope.emit'});
    };
    $scope.emit = function(){
        // Controller 1 $scope, and all parent $scopes (including $rootScope) 
        // will see this event
        $scope.$emit('eventX', {data: '$scope.emit'});
    };

    $scope.$on('eventX', function(ev, args){
        console.log('eventX found on Controller1 $scope');
    });
    $rootScope.$on('eventX', function(ev, args){
        console.log('eventX found on $rootScope');
    });
}]);

Another way is to use FIXED function, you can specify the number of decimal places but it defaults to 2 if the places aren't specified, i.e.

=FIXED(E5,2)

or just

=FIXED(E5)

request.getContextPath()- returns root path of your application, while ../ - returns parent directory of a file.

You use request.getContextPath(), as it will always points to root of your application. If you were to move your jsp file from one directory to another, nothing needs to be changed. Now, consider the second approach. If you were to move your jsp files from one folder to another, you'd have to make changes at every location where you are referring your files.

Also, better approach of using request.getContextPath() will be to set 'request.getContextPath()' in a variable and use that variable for referring your path.

<c:set var="context" value="${pageContext.request.contextPath}" />
<script src="${context}/themes/js/jquery.js"></script>

PS- This is the one reason I can figure out. Don't know if there is any more significance to it.

Building on Amine's answer, create a helper like:

public static class HtmlHelperExtensions
{
    public static MvcHtmlString CurrencyFormat(this HtmlHelper helper, string value)
    {
        var result = string.Format("{0:C2}", value);
        return new MvcHtmlString(result);
    }
}

in your view: use @Html.CurrencyFormat(model.value)

If you are doing simple formating like Standard Numeric Formats, then simple use string.Format() in your view like in the helper example above:

@string.Format("{0:C2}", model.value)

Use JContainer.Parse(str) method to check if the str is a valid Json. If this throws exception then it is not a valid Json.

JObject.Parse - Can be used to check if the string is a valid Json object
JArray.Parse - Can be used to check if the string is a valid Json Array
JContainer.Parse - Can be used to check for both Json object & Array

You can use iText for do such things

//iText imports

import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.parser.PdfTextExtractor;

for example:

try {     
    PdfReader reader = new PdfReader(INPUTFILE);
    int n = reader.getNumberOfPages(); 
    String str=PdfTextExtractor.getTextFromPage(reader, 2); //Extracting the content from a particular page.
    System.out.println(str);
    reader.close();
} catch (Exception e) {
    System.out.println(e);
}

another one

try {

    PdfReader reader = new PdfReader("c:/temp/test.pdf");
    System.out.println("This PDF has "+reader.getNumberOfPages()+" pages.");
    String page = PdfTextExtractor.getTextFromPage(reader, 2);
    System.out.println("Page Content:\n\n"+page+"\n\n");
    System.out.println("Is this document tampered: "+reader.isTampered());
    System.out.println("Is this document encrypted: "+reader.isEncrypted());
} catch (IOException e) {
    e.printStackTrace();
}

the above examples can only extract the text, but you need to do some more to remove hyperlinks, bullets, heading & numbers.

You can use npm postscribe to load script in react component

postscribe('#mydiv', '<script src="https://use.typekit.net/foobar.js"></script>')

No mention of Merge?

DataSet newdataset = new DataSet();

newdataset.Merge( olddataset.Tables[0].Select( filterstring, sortstring ));

Take a look at autoexpect (decent tutorial HERE). It's about as quick-and-dirty as you can get without resorting to trickery.

Rules are used to enhance the behaviour of each test method in a generic way. Junit rule intercept the test method and allows us to do something before a test method starts execution and after a test method has been executed.

For example, Using @Timeout rule we can set the timeout for all the tests.

public class TestApp {
    @Rule
    public Timeout globalTimeout = new Timeout(20, TimeUnit.MILLISECONDS);

    ......
    ......

 }

@TemporaryFolder rule is used to create temporary folders, files. Every time the test method is executed, a temporary folder is created and it gets deleted after the execution of the method.

public class TempFolderTest {

 @Rule
 public TemporaryFolder tempFolder= new TemporaryFolder();

 @Test
 public void testTempFolder() throws IOException {
  File folder = tempFolder.newFolder("demos");
  File file = tempFolder.newFile("Hello.txt");

  assertEquals(folder.getName(), "demos");
  assertEquals(file.getName(), "Hello.txt");

 }


}

You can see examples of some in-built rules provided by junit at this link.

Here is my example how create filter and directive for table jsfiddle

directive get list (datas) and create table with filters

<div ng-app="autoDrops" ng-controller="HomeController">
<div class="row">
    <div class="col-md-12">
        <h1>{{title}}</h1>
        <ng-Multiselect array-List="datas"></ng-Multiselect>
    </div>
</div>
</div>

my pleasure if i help you

My project is built in Yii & uses the Bootstrap-Yii plugin, so this answer is only relevant if you're using Yii.

The above fix did work but only after the first time the modal was shown. The first time it came up empty. I think that's because after my initiation of the code Yii calls the hide function of the modal thereby clearing out my initiation variables.

I found that putting the removeData call immediately before the code that launched the modal did the trick. So my code is structured like this...

$ ("#myModal").removeData ('modal');
$ ('#myModal').modal ({remote : 'path_to_remote'});

I ran into this issue when I was trying to restore a backed up mysql database from a different server. What solved this issue for me was adding certain settings to my.conf (like in the questions above) and additionally changing the sql backup file:

Step 1: add or edit the following lines in my.conf:

innodb_page_size=32K
innodb_file_format=Barracuda
innodb_file_per_table=1

Step 2 add ROW_FORMAT=DYNAMIC to the table create statement in the sql backup file for the table that is causing this error:

DROP TABLE IF EXISTS `problematic_table`;
/*!40101 SET @saved_cs_client = @@character_set_client */;
/*!40101 SET character_set_client = utf8 */;
CREATE TABLE `problematic_table` (
`id` bigint(20) NOT NULL AUTO_INCREMENT,
  ...
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 ROW_FORMAT=DYNAMIC;

the important change above is ROW_FORMAT=DYNAMIC; (that was not included in the orignal sql backup file)

source that helped me to resolve this issue: MariaDB and InnoDB MySQL Row size too large

Everyone has their personal favorite, and this is mine:

RUN useradd --user-group --system --create-home --no-log-init app
USER app

Reference: man useradd

The RUN line will add the user and group app:

root@ef3e54b60048:/# id app
uid=999(app) gid=999(app) groups=999(app)

Use a more specific name than app if the image is to be reused as a base image. As an aside, include --shell /bin/bash if you really need.

Partial credit: answer by Ryan M

The check can be done like this:

if (!!inp.val()) {

}

and even shorter:

if (inp.val()) {

}

Thou the above answer is widely accepted and well documented, I found some of the reason to post my answer here :-

    doNothing().when(InternalUtils.class); //This is the preferred way
                                           //to mock static void methods.
    InternalUtils.sendEmail(anyString(), anyString(), anyString(), anyString());

Here, I dont understand why we are calling InternalUtils.sendEmail ourself. I will explain in my code why we don't need to do that.

mockStatic(Internalutils.class);

So, we have mocked the class which is fine. Now, lets have a look how we need to verify the sendEmail(/..../) method.

@PrepareForTest({InternalService.InternalUtils.class})
@RunWith(PowerMockRunner.class)
public class InternalServiceTest {

    @Mock
    private InternalService.Order order;

    private InternalService internalService;

    @Before
    public void setup() {
        MockitoAnnotations.initMocks(this);
        internalService = new InternalService();
    }

    @Test
    public void processOrder() throws Exception {

        Mockito.when(order.isSuccessful()).thenReturn(true);
        PowerMockito.mockStatic(InternalService.InternalUtils.class);

        internalService.processOrder(order);

        PowerMockito.verifyStatic(times(1));
        InternalService.InternalUtils.sendEmail(anyString(), any(String[].class), anyString(), anyString());
    }

}

These two lines is where the magic is, First line tells the PowerMockito framework that it needs to verify the class it statically mocked. But which method it need to verify ?? Second line tells which method it needs to verify.

PowerMockito.verifyStatic(times(1));
InternalService.InternalUtils.sendEmail(anyString(), any(String[].class), anyString(), anyString());

This is code of my class, sendEmail api twice.

public class InternalService {

    public void processOrder(Order order) {
        if (order.isSuccessful()) {
            InternalUtils.sendEmail("", new String[1], "", "");
            InternalUtils.sendEmail("", new String[1], "", "");
        }
    }

    public static class InternalUtils{

        public static void sendEmail(String from, String[]  to, String msg, String body){

        }

    }

    public class Order{

        public boolean isSuccessful(){
            return true;
        }

    }

}

As it is calling twice you just need to change the verify(times(2))... that's all.

You should not wrap JavaScript expressions in quotes.

<option data-img-src={this.props.imageUrl} value="1">{this.props.title}</option>

Take a look at the JavaScript Expressions docs for more info.

This will also checks in leap year. This is pure regex, so it's faster than any lib (also faster than moment.js). But if you gonna use a lot of dates in ur code, I do recommend to use moment.js

var dateRegex = /^(?=\d)(?:(?:31(?!.(?:0?[2469]|11))|(?:30|29)(?!.0?2)|29(?=.0?2.(?:(?:(?:1[6-9]|[2-9]\d)?(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00)))(?:\x20|$))|(?:2[0-8]|1\d|0?[1-9]))([-.\/])(?:1[012]|0?[1-9])\1(?:1[6-9]|[2-9]\d)?\d\d(?:(?=\x20\d)\x20|$))?(((0?[1-9]|1[012])(:[0-5]\d){0,2}(\x20[AP]M))|([01]\d|2[0-3])(:[0-5]\d){1,2})?$/;

console.log(dateRegex.test('21/01/1986'));

http://regexper.com/....

If you want to migrate a #git repository from one server to a new one you can do it like this:

git clone OLD_REPOSITORY_PATH
cd OLD_REPOSITORY_DIR
git remote add NEW_REPOSITORY_ALIAS  NEW_REPOSITORY_PATH
#check out all remote branches 
for remote in `git branch -r | grep -v master `; do git checkout --track $remote ; done
git push --mirror NEW_REPOSITORY_PATH
git push NEW_REPOSITORY_ALIAS --tags

All remote branches and tags from the old repository will be copied to the new repository.

Running this command alone:

git push NEW_REPOSITORY_ALIAS

would only copy a master branch (only tracking branches) to the new repository.

take a list of string as like

List<string> colValListForValidation = new List<string>();

and match string before the task. it will help you bcz all merge cells will have same value

You could use this: http://getfirebug.com/js.html. It has a profiler for JavaScript.

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

Using git version 1.7.9.5 there is no "remove" command for remote. Use "rm" instead.

$ git remote rm upstream
$ git remote add upstream https://github.com/Foo/repos.git

or, as noted in the previous answer, set-url works.

I don't know when the command changed, but Ubuntu 12.04 shipped with 1.7.9.5.

Use a Temp Table or a Table variable, e.g.

select 'A' as [value]
into #tmp
union
select 'B'
union 
select 'C'

and then

SELECT   
blah 
FROM    foo 
WHERE   myField IN (select [value] from #tmp) 

or

SELECT   
f.blah 
FROM foo f INNER JOIN #tmp t ON f.myField = t.[value]

I guess inspect is the best way to do this. For example:

import inspect
def bar():
    print("My name is", inspect.stack()[0][3])

You can call a non static method within a static one using: Classname.class.method()

Use an interval to check

You can setup an interval to keep checking if the user has scrolled then do something accordingly.

Borrowing from the great John Resig in his article.

Example:

    let didScroll = false;

    window.onscroll = () => didScroll = true;

    setInterval(() => {
        if ( didScroll ) {
            didScroll = false;
            console.log('Someone scrolled me!')
        }
    }, 250);

See live example

In addition to @Aleksandr Tukallo's answer, you could also obtain the output and error message (if occurs). Compressing a folder using tar is explained pretty well on the following answer.

import traceback
import subprocess

try:
    cmd = ['tar', 'czfj', output_filename, file_to_archive]
    output = subprocess.check_output(cmd).decode("utf-8").strip() 
    print(output)          
except Exception:       
    print(f"E: {traceback.format_exc()}")       

For any of you calling back to the same server for your IFRAME, pass this simple header inside the IFRAME page:

Content-Security-Policy: frame-ancestors 'self'

Or, add this to your web server's CSP configuration.

I will give an example of what is Promise and how its value could be set at any time, in opposite to Future, which value is only readable.

Suppose you have a mom and you ask her for money.

// Now , you trick your mom into creating you a promise of eventual
// donation, she gives you that promise object, but she is not really
// in rush to fulfill it yet:
Supplier<Integer> momsPurse = ()-> {

        try {
            Thread.sleep(1000);//mom is busy
        } catch (InterruptedException e) {
            ;
        }

        return 100;

    };


ExecutorService ex = Executors.newFixedThreadPool(10);

CompletableFuture<Integer> promise =  
CompletableFuture.supplyAsync(momsPurse, ex);

// You are happy, you run to thank you your mom:
promise.thenAccept(u->System.out.println("Thank you mom for $" + u ));

// But your father interferes and generally aborts mom's plans and 
// completes the promise (sets its value!) with far lesser contribution,
// as fathers do, very resolutely, while mom is slowly opening her purse 
// (remember the Thread.sleep(...)) :
promise.complete(10); 

Output of that is:

Thank you mom for $10

Mom's promise was created , but waited for some "completion" event.

CompletableFuture<Integer> promise...

You created such event, accepting her promise and announcing your plans to thank your mom:

promise.thenAccept...

At this moment mom started open her purse...but very slow...

and father interfered much faster and completed the promise instead of your mom:

promise.complete(10);

Have you noticed an executor that I wrote explicitly?

Interestingly, if you use a default implicit executor instead (commonPool) and father is not at home, but only mom with her "slow purse", then her promise will only complete, if the program lives longer than mom needs to get money from the purse.

The default executor acts kind of like a "daemon" and does not wait for all promises to be fulfilled. I have not found a good description of this fact...

If the other answers don’t remove RVM throughly enough for you, RVM’s Troubleshooting page contains this section:

How do I completely clean out all traces of RVM from my system, including for system wide installs?

Here is a custom script which we name as cleanout-rvm. While you can definitely use rvm implode as a regular user or rvmsudo rvm implode for a system wide install, this script is useful as it steps completely outside of RVM and cleans out RVM without using RVM itself, leaving no traces.

#!/bin/bash
/usr/bin/sudo rm -rf $HOME/.rvm $HOME/.rvmrc /etc/rvmrc /etc/profile.d/rvm.sh /usr/local/rvm /usr/local/bin/rvm
/usr/bin/sudo /usr/sbin/groupdel rvm
/bin/echo "RVM is removed. Please check all .bashrc|.bash_profile|.profile|.zshrc for RVM source lines and delete
or comment out if this was a Per-User installation."

you should declare label first use this :

    Select Case parameter 
        Case "userID"
                    ' does something here.
            Case "packageID"
                    ' does something here.
            Case "mvrType" 
                    If otherFactor Then 
                            ' does something here. 
                    Else 
                            GoTo else
                    End If 

            Case Else 
else :
                    ' does some processing... 
                    Exit Select 
    End Select

if you want the color to change when you have simply add the :hover pseudo

div.e:hover {
    background-color:red;
}

Homebrew users: you can get lsusb by installing usbutils formula from my tap:

brew install mikhailai/misc/usbutils

It installs the REAL lsusb based on Linux sources (version 007).

String path = "C:"+File.separator+"hello";
String fname= path+File.separator+"abc.txt";
    File f = new File(path);
    File f1 = new File(fname);

    f.mkdirs() ;
    try {
        f1.createNewFile();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

This should create a new file inside a directory

In python, for loops iterate over iterables, instead of incrementing a counter, so you have a couple choices. Using a skip flag like Artsiom recommended is one way to do it. Another option is to make a generator from your range and manually advance it by discarding an element using next().

iGen = (i for i in range(0, 6))
for i in iGen:
    print i
    if not i % 2:
        iGen.next()

But this isn't quite complete because next() might throw a StopIteration if it reaches the end of the range, so you have to add some logic to detect that and break out of the outer loop if that happens.

In the end, I'd probably go with aw4ully's solution with the while loops.

One recipe that I have used (described here: Co-Director Network Data Files in GEXF and JSON from OpenCorporates Data via Scraperwiki and networkx ) runs as follows:

• generate a network representation using networkx
• export the network as a JSON file
• import that JSON into to d3.js. (networkx can export both the tree and graph/network representations that d3.js can import).

The networkx JSON exporter takes the form:

from networkx.readwrite import json_graph
import json
print json.dumps(json_graph.node_link_data(G))

Alternatively you can export the network as a GEXF XML file and then import this representation into the sigma.js Javascript visualisation library.

from xml.etree.cElementTree import tostring
writer=gf.GEXFWriter(encoding='utf-8',prettyprint=True,version='1.1draft')
writer.add_graph(G)
print tostring(writer.xml)

Solved it by setting the naughty EditText:

etSearch = (EditText) view.findViewById(R.id.etSearch);

etSearch.setInputType(InputType.TYPE_NULL);

etSearch.setOnTouchListener(new OnTouchListener() {
    @Override
    public boolean onTouch(View v, MotionEvent event) {
        etSearch.setInputType(InputType.TYPE_CLASS_TEXT);
        return false;
    }
});

There are several libraries. Here are two examples:

❐ Apache Commons Lang

Apache Commons Lang includes a special class to escape or unescape strings (CSV, EcmaScript, HTML, Java, Json, XML): org.apache.commons.lang3.StringEscapeUtils.

• Escape to CSV

  String escaped = StringEscapeUtils
      .escapeCsv("I said \"Hey, I am 5'10\".\""); // I said "Hey, I am 5'10"."
  
  System.out.println(escaped); // "I said ""Hey, I am 5'10""."""
  

• Unescape from CSV

  String unescaped = StringEscapeUtils
      .unescapeCsv("\"I said \"\"Hey, I am 5'10\"\".\"\"\""); // "I said ""Hey, I am 5'10""."""
  
  System.out.println(unescaped); // I said "Hey, I am 5'10"."
  

_{* You can download it from here.}

❐ OpenCSV

If you use OpenCSV, you will not need to worry about escape or unescape, only for write or read the content.

• Writing file:

  FileOutputStream fos = new FileOutputStream("awesomefile.csv"); 
  OutputStreamWriter osw = new OutputStreamWriter(fos, "UTF-8");
  CSVWriter writer = new CSVWriter(osw);
  ...
  String[] row = {
      "123", 
      "John", 
      "Smith", 
      "39", 
      "I said \"Hey, I am 5'10\".\""
  };
  writer.writeNext(row);
  ...
  writer.close();
  osw.close();
  os.close();
  

• Reading file:

  FileInputStream fis = new FileInputStream("awesomefile.csv"); 
  InputStreamReader isr = new InputStreamReader(fis, "UTF-8");
  CSVReader reader = new CSVReader(isr);
  
  for (String[] row; (row = reader.readNext()) != null;) {
      System.out.println(Arrays.toString(row));
  }
  
  reader.close();
  isr.close();
  fis.close();
  

_{* You can download it from here.}

Forget Everything just check out this

double num = 2.22939393;
num  = Convert.ToDouble(num.ToString("#0.000"));

class SuperType {

    public static void  classMethod(){
        System.out.println("Super type class method");
    }
    public void instancemethod(){
        System.out.println("Super Type instance method");
    }
}


public class SubType extends SuperType{


    public static void classMethod(){
        System.out.println("Sub type class method");
    }
    public void instancemethod(){
        System.out.println("Sub Type instance method");
    }
    public static void main(String args[]){
        SubType s=new SubType();
        SuperType su=s;
        SuperType.classMethod();// Prints.....Super type class method
        su.classMethod();   //Prints.....Super type class method
        SubType.classMethod(); //Prints.....Sub type class method 
    }
}

This example for static method overriding

Note: if we call a static method with object reference, then reference type(class) static method will be called, not object class static method.

Static method belongs to class only.

As an alternative SuperPutty has tabs and the option to run the same command across many terminals... might be what someone is looking for.

https://code.google.com/p/superputty/

It imports your PuTTY sessions too.

Have you tried setting JButton.setOpaque(true)?

JButton button = new JButton("test");
button.setBackground(Color.RED);
button.setOpaque(true);

If you want to do it with phpmyadmin interface:

Select the table -> Go to structure tab -> On the row corresponding to the column you want, click on the icon with a key

Below format try if number is like

ex 1 suppose number like 10.1 if apply below format it will be come as 10.10

ex 2 suppose number like .02 if apply below format it will be come as 0.02

ex 3 suppose number like 0.2 if apply below format it will be come as 0.20

to_char(round(to_number(column_name)/10000000,2),'999999999990D99') as column_name

color class taken from bootstrap color picker

// Color object
var Color = function(val) {
    this.value = {
        h: 1,
        s: 1,
        b: 1,
        a: 1
    };
    this.setColor(val);
};

Color.prototype = {
    constructor: Color,

    //parse a string to HSB
    setColor: function(val){
        val = val.toLowerCase();
        var that = this;
        $.each( CPGlobal.stringParsers, function( i, parser ) {
            var match = parser.re.exec( val ),
            values = match && parser.parse( match ),
            space = parser.space||'rgba';
            if ( values ) {
                if (space === 'hsla') {
                    that.value = CPGlobal.RGBtoHSB.apply(null, CPGlobal.HSLtoRGB.apply(null, values));
                } else {
                    that.value = CPGlobal.RGBtoHSB.apply(null, values);
                }
                return false;
            }
        });
    },

    setHue: function(h) {
        this.value.h = 1- h;
    },

    setSaturation: function(s) {
        this.value.s = s;
    },

    setLightness: function(b) {
        this.value.b = 1- b;
    },

    setAlpha: function(a) {
        this.value.a = parseInt((1 - a)*100, 10)/100;
    },

    // HSBtoRGB from RaphaelJS
    // https://github.com/DmitryBaranovskiy/raphael/
    toRGB: function(h, s, b, a) {
        if (!h) {
            h = this.value.h;
            s = this.value.s;
            b = this.value.b;
        }
        h *= 360;
        var R, G, B, X, C;
        h = (h % 360) / 60;
        C = b * s;
        X = C * (1 - Math.abs(h % 2 - 1));
        R = G = B = b - C;

        h = ~~h;
        R += [C, X, 0, 0, X, C][h];
        G += [X, C, C, X, 0, 0][h];
        B += [0, 0, X, C, C, X][h];
        return {
            r: Math.round(R*255),
            g: Math.round(G*255),
            b: Math.round(B*255),
            a: a||this.value.a
        };
    },

    toHex: function(h, s, b, a){
        var rgb = this.toRGB(h, s, b, a);
        return '#'+((1 << 24) | (parseInt(rgb.r) << 16) | (parseInt(rgb.g) << 8) | parseInt(rgb.b)).toString(16).substr(1);
    },

    toHSL: function(h, s, b, a){
        if (!h) {
            h = this.value.h;
            s = this.value.s;
            b = this.value.b;
        }
        var H = h,
        L = (2 - s) * b,
        S = s * b;
        if (L > 0 && L <= 1) {
            S /= L;
        } else {
            S /= 2 - L;
        }
        L /= 2;
        if (S > 1) {
            S = 1;
        }
        return {
            h: H,
            s: S,
            l: L,
            a: a||this.value.a
        };
    }
};

how to use

var color = new Color("RGB(0,5,5)");
color.toHex()

Driver.getPageSource() is a bad way to verify text present. Suppose you say, driver.getPageSource().contains("input"); That doesn't verify "input" is present on the screen, only that "input" is present in the html, like an input tag.

I usually verify text on an element by using xpath:

boolean textFound = false;  
try {
    driver.findElement(By.xpath("//*[contains(text(),'someText')]"));
    textFound = true;
} catch (Exception e) {
    textFound = false;
}

If you want an exact text match, just remove the contains function:

driver.findElement(By.xpath("//*[text()='someText']));

To go up a directory in a link, use ... This means "go up one directory", so your link will look something like this:

<a href="../index.html">Home</a>

a = {2,3,4}
if {1,2} & a:
    pass

Code golf version. Consider using a set if it makes sense to do so. I find this more readable than a list comprehension.

First open Your cmd pannel And enter mysql -u root -p (And Hit Enter) After cmd ask's for mysql password (if you have mysql password so enter now and hit enter again) now type source mysqldata.sql(Hit Enter) Your database will import without any error

I use this line for Spring Boot applications:

logging.level.org.springframework.jdbc.core = TRACE

This approach pretty universal and I usually use it for any other classes inside my application.

If column dbo.patient_address.id_no allows NULLs then you could use this solution:

SET XACT_ABORT ON;
BEGIN TRANSACTION;

-- I assmume that [id] is the primary key of patient_address table (single column key)
-- replace the name of [id] column with the name of PK column from patient_address table
-- replace INT data type with the proper type
DECLARE @RowsForUpdate TABLE([id] INT PRIMARY KEY); 
UPDATE patient_address 
SET id_no = NULL
OUTPUT deleted.[id] INTO @RowsForUpdate ([id])
WHERE id_no='8008255601088'

UPDATE patient 
SET id_no='7008255601088' 
WHERE id_no='8008255601088'

UPDATE patient_address 
SET id_no='7008255601088' 
WHERE [id] IN (SELECT u.[id] FROM @RowsForUpdate u)

COMMIT;

You need to declare the variables outside the function:

Public iRaw As Integer
Public iColumn As Integer

Function find_results_idle()
    iRaw = 1
    iColumn = 1


 will work on all majors browsers (IE included)

Here's the code to implement java comparable interface,

// adding implements comparable to class declaration
public class Animal implements Comparable<Animal>
{
    public String name;
    public int yearDiscovered;
    public String population;

    public Animal(String name, int yearDiscovered, String population)
    {
        this.name = name;
        this.yearDiscovered = yearDiscovered;
        this.population = population; 
    }

    public String toString()
    {
        String s = "Animal name : " + name + "\nYear Discovered : " + yearDiscovered + "\nPopulation: " + population;
        return s;
    }

    @Override
    public int compareTo(Animal other)  // compareTo method performs the comparisons 
    {
        return Integer.compare(this.year_discovered, other.year_discovered);
    }
}

This UtilException helper class lets you use any checked exceptions in Java streams, like this:

Stream.of("java.lang.Object", "java.lang.Integer", "java.lang.String")
      .map(rethrowFunction(Class::forName))
      .collect(Collectors.toList());

Note Class::forName throws ClassNotFoundException, which is checked. The stream itself also throws ClassNotFoundException, and NOT some wrapping unchecked exception.

public final class UtilException {

@FunctionalInterface
public interface Consumer_WithExceptions<T, E extends Exception> {
    void accept(T t) throws E;
    }

@FunctionalInterface
public interface BiConsumer_WithExceptions<T, U, E extends Exception> {
    void accept(T t, U u) throws E;
    }

@FunctionalInterface
public interface Function_WithExceptions<T, R, E extends Exception> {
    R apply(T t) throws E;
    }

@FunctionalInterface
public interface Supplier_WithExceptions<T, E extends Exception> {
    T get() throws E;
    }

@FunctionalInterface
public interface Runnable_WithExceptions<E extends Exception> {
    void run() throws E;
    }

/** .forEach(rethrowConsumer(name -> System.out.println(Class.forName(name)))); or .forEach(rethrowConsumer(ClassNameUtil::println)); */
public static <T, E extends Exception> Consumer<T> rethrowConsumer(Consumer_WithExceptions<T, E> consumer) throws E {
    return t -> {
        try { consumer.accept(t); }
        catch (Exception exception) { throwAsUnchecked(exception); }
        };
    }

public static <T, U, E extends Exception> BiConsumer<T, U> rethrowBiConsumer(BiConsumer_WithExceptions<T, U, E> biConsumer) throws E {
    return (t, u) -> {
        try { biConsumer.accept(t, u); }
        catch (Exception exception) { throwAsUnchecked(exception); }
        };
    }

/** .map(rethrowFunction(name -> Class.forName(name))) or .map(rethrowFunction(Class::forName)) */
public static <T, R, E extends Exception> Function<T, R> rethrowFunction(Function_WithExceptions<T, R, E> function) throws E {
    return t -> {
        try { return function.apply(t); }
        catch (Exception exception) { throwAsUnchecked(exception); return null; }
        };
    }

/** rethrowSupplier(() -> new StringJoiner(new String(new byte[]{77, 97, 114, 107}, "UTF-8"))), */
public static <T, E extends Exception> Supplier<T> rethrowSupplier(Supplier_WithExceptions<T, E> function) throws E {
    return () -> {
        try { return function.get(); }
        catch (Exception exception) { throwAsUnchecked(exception); return null; }
        };
    }

/** uncheck(() -> Class.forName("xxx")); */
public static void uncheck(Runnable_WithExceptions t)
    {
    try { t.run(); }
    catch (Exception exception) { throwAsUnchecked(exception); }
    }

/** uncheck(() -> Class.forName("xxx")); */
public static <R, E extends Exception> R uncheck(Supplier_WithExceptions<R, E> supplier)
    {
    try { return supplier.get(); }
    catch (Exception exception) { throwAsUnchecked(exception); return null; }
    }

/** uncheck(Class::forName, "xxx"); */
public static <T, R, E extends Exception> R uncheck(Function_WithExceptions<T, R, E> function, T t) {
    try { return function.apply(t); }
    catch (Exception exception) { throwAsUnchecked(exception); return null; }
    }

@SuppressWarnings ("unchecked")
private static <E extends Throwable> void throwAsUnchecked(Exception exception) throws E { throw (E)exception; }

}

Many other examples on how to use it (after statically importing UtilException):

@Test
public void test_Consumer_with_checked_exceptions() throws IllegalAccessException {
    Stream.of("java.lang.Object", "java.lang.Integer", "java.lang.String")
          .forEach(rethrowConsumer(className -> System.out.println(Class.forName(className))));

    Stream.of("java.lang.Object", "java.lang.Integer", "java.lang.String")
          .forEach(rethrowConsumer(System.out::println));
    }

@Test
public void test_Function_with_checked_exceptions() throws ClassNotFoundException {
    List<Class> classes1
          = Stream.of("Object", "Integer", "String")
                  .map(rethrowFunction(className -> Class.forName("java.lang." + className)))
                  .collect(Collectors.toList());

    List<Class> classes2
          = Stream.of("java.lang.Object", "java.lang.Integer", "java.lang.String")
                  .map(rethrowFunction(Class::forName))
                  .collect(Collectors.toList());
    }

@Test
public void test_Supplier_with_checked_exceptions() throws ClassNotFoundException {
    Collector.of(
          rethrowSupplier(() -> new StringJoiner(new String(new byte[]{77, 97, 114, 107}, "UTF-8"))),
          StringJoiner::add, StringJoiner::merge, StringJoiner::toString);
    }

@Test    
public void test_uncheck_exception_thrown_by_method() {
    Class clazz1 = uncheck(() -> Class.forName("java.lang.String"));

    Class clazz2 = uncheck(Class::forName, "java.lang.String");
    }

@Test (expected = ClassNotFoundException.class)
public void test_if_correct_exception_is_still_thrown_by_method() {
    Class clazz3 = uncheck(Class::forName, "INVALID");
    }

But don't use it before understanding the following advantages, disadvantages, and limitations:

• If the calling-code is to handle the checked exception you MUST add it to the throws clause of the method that contains the stream. The compiler will not force you to add it anymore, so it's easier to forget it.

• If the calling-code already handles the checked exception, the compiler WILL remind you to add the throws clause to the method declaration that contains the stream (if you don't it will say: Exception is never thrown in body of corresponding try statement).

• In any case, you won't be able to surround the stream itself to catch the checked exception INSIDE the method that contains the stream (if you try, the compiler will say: Exception is never thrown in body of corresponding try statement).

• If you are calling a method which literally can never throw the exception that it declares, then you should not include the throws clause. For example: new String(byteArr, "UTF-8") throws UnsupportedEncodingException, but UTF-8 is guaranteed by the Java spec to always be present. Here, the throws declaration is a nuisance and any solution to silence it with minimal boilerplate is welcome.

• If you hate checked exceptions and feel they should never be added to the Java language to begin with (a growing number of people think this way, and I am NOT one of them), then just don't add the checked exception to the throws clause of the method that contains the stream. The checked exception will, then, behave just like an UNchecked exception.

• If you are implementing a strict interface where you don't have the option for adding a throws declaration, and yet throwing an exception is entirely appropriate, then wrapping an exception just to gain the privilege of throwing it results in a stacktrace with spurious exceptions which contribute no information about what actually went wrong. A good example is Runnable.run(), which does not throw any checked exceptions. In this case, you may decide not to add the checked exception to the throws clause of the method that contains the stream.

• In any case, if you decide NOT to add (or forget to add) the checked exception to the throws clause of the method that contains the stream, be aware of these 2 consequences of throwing CHECKED exceptions:

1) The calling-code won't be able to catch it by name (if you try, the compiler will say: Exception is never thrown in body of corresponding try statement). It will bubble and probably be catched in the main program loop by some "catch Exception" or "catch Throwable", which may be what you want anyway.

2) It violates the principle of least surprise: it will no longer be enough to catch RuntimeException to be able to guarantee catching all possible exceptions. For this reason, I believe this should not be done in framework code, but only in business code that you completely control.

In conclusion: I believe the limitations here are not serious, and the UtilException class may be used without fear. However, it's up to you!

• References:
  • http://www.philandstuff.com/2012/04/28/sneakily-throwing-checked-exceptions.html
  • http://www.mail-archive.com/[email protected]/msg05984.html
  • Project Lombok annotation: @SneakyThrows
  • Brian Goetz opinion (against) here: How can I throw CHECKED exceptions from inside Java 8 streams?
  • https://softwareengineering.stackexchange.com/questions/225931/workaround-for-java-checked-exceptions?newreg=ddf0dd15e8174af8ba52e091cf85688e *

The Oracle SQL developer is not supported by the 64bit JDK. To resolve this issue:

1. Install a 32bit JDK (x86)
2. Update your SQL developer config file (It should now point to the new 32bit JDK).
3. Edit the sqldeveloper.conf, which can be found under {ORACLE_HOME}\sqldeveloper\sqldeveloper\bin\sqldeveloper.conf
4. Make sure SetJavaHome is pointing to your 32bit JDK.

For example:

SetJavaHome C:\Program Files (x86) \Java\jdk1.6.0_13

Here is another possible solution, using the resolve attribute of the $stateProvider or the $routeProvider. Example with $stateProvider:

.config(["$stateProvider", function ($stateProvider) {

  $stateProvider

  .state("forbidden", {
    /* ... */
  })

  .state("signIn", {
    /* ... */
    resolve: {
      access: ["Access", function (Access) { return Access.isAnonymous(); }],
    }
  })

  .state("home", {
    /* ... */
    resolve: {
      access: ["Access", function (Access) { return Access.isAuthenticated(); }],
    }
  })

  .state("admin", {
    /* ... */
    resolve: {
      access: ["Access", function (Access) { return Access.hasRole("ROLE_ADMIN"); }],
    }
  });

}])

Access resolves or rejects a promise depending on the current user rights:

.factory("Access", ["$q", "UserProfile", function ($q, UserProfile) {

  var Access = {

    OK: 200,

    // "we don't know who you are, so we can't say if you're authorized to access
    // this resource or not yet, please sign in first"
    UNAUTHORIZED: 401,

    // "we know who you are, and your profile does not allow you to access this resource"
    FORBIDDEN: 403,

    hasRole: function (role) {
      return UserProfile.then(function (userProfile) {
        if (userProfile.$hasRole(role)) {
          return Access.OK;
        } else if (userProfile.$isAnonymous()) {
          return $q.reject(Access.UNAUTHORIZED);
        } else {
          return $q.reject(Access.FORBIDDEN);
        }
      });
    },

    hasAnyRole: function (roles) {
      return UserProfile.then(function (userProfile) {
        if (userProfile.$hasAnyRole(roles)) {
          return Access.OK;
        } else if (userProfile.$isAnonymous()) {
          return $q.reject(Access.UNAUTHORIZED);
        } else {
          return $q.reject(Access.FORBIDDEN);
        }
      });
    },

    isAnonymous: function () {
      return UserProfile.then(function (userProfile) {
        if (userProfile.$isAnonymous()) {
          return Access.OK;
        } else {
          return $q.reject(Access.FORBIDDEN);
        }
      });
    },

    isAuthenticated: function () {
      return UserProfile.then(function (userProfile) {
        if (userProfile.$isAuthenticated()) {
          return Access.OK;
        } else {
          return $q.reject(Access.UNAUTHORIZED);
        }
      });
    }

  };

  return Access;

}])

UserProfile copies the current user properties, and implement the $hasRole, $hasAnyRole, $isAnonymous and $isAuthenticated methods logic (plus a $refresh method, explained later):

.factory("UserProfile", ["Auth", function (Auth) {

  var userProfile = {};

  var clearUserProfile = function () {
    for (var prop in userProfile) {
      if (userProfile.hasOwnProperty(prop)) {
        delete userProfile[prop];
      }
    }
  };

  var fetchUserProfile = function () {
    return Auth.getProfile().then(function (response) {
      clearUserProfile();
      return angular.extend(userProfile, response.data, {

        $refresh: fetchUserProfile,

        $hasRole: function (role) {
          return userProfile.roles.indexOf(role) >= 0;
        },

        $hasAnyRole: function (roles) {
          return !!userProfile.roles.filter(function (role) {
            return roles.indexOf(role) >= 0;
          }).length;
        },

        $isAnonymous: function () {
          return userProfile.anonymous;
        },

        $isAuthenticated: function () {
          return !userProfile.anonymous;
        }

      });
    });
  };

  return fetchUserProfile();

}])

Auth is in charge of requesting the server, to know the user profile (linked to an access token attached to the request for example):

.service("Auth", ["$http", function ($http) {

  this.getProfile = function () {
    return $http.get("api/auth");
  };

}])

The server is expected to return such a JSON object when requesting GET api/auth:

{
  "name": "John Doe", // plus any other user information
  "roles": ["ROLE_ADMIN", "ROLE_USER"], // or any other role (or no role at all, i.e. an empty array)
  "anonymous": false // or true
}

Finally, when Access rejects a promise, if using ui.router, the $stateChangeError event will be fired:

.run(["$rootScope", "Access", "$state", "$log", function ($rootScope, Access, $state, $log) {

  $rootScope.$on("$stateChangeError", function (event, toState, toParams, fromState, fromParams, error) {
    switch (error) {

    case Access.UNAUTHORIZED:
      $state.go("signIn");
      break;

    case Access.FORBIDDEN:
      $state.go("forbidden");
      break;

    default:
      $log.warn("$stateChangeError event catched");
      break;

    }
  });

}])

If using ngRoute, the $routeChangeError event will be fired:

.run(["$rootScope", "Access", "$location", "$log", function ($rootScope, Access, $location, $log) {

  $rootScope.$on("$routeChangeError", function (event, current, previous, rejection) {
    switch (rejection) {

    case Access.UNAUTHORIZED:
      $location.path("/signin");
      break;

    case Access.FORBIDDEN:
      $location.path("/forbidden");
      break;

    default:
      $log.warn("$stateChangeError event catched");
      break;

    }
  });

}])

The user profile can also be accessed in the controllers:

.state("home", {
  /* ... */
  controller: "HomeController",
  resolve: {
    userProfile: "UserProfile"
  }
})

UserProfile then contains the properties returned by the server when requesting GET api/auth:

.controller("HomeController", ["$scope", "userProfile", function ($scope, userProfile) {

  $scope.title = "Hello " + userProfile.name; // "Hello John Doe" in the example

}])

UserProfile needs to be refreshed when a user signs in or out, so that Access can handle the routes with the new user profile. You can either reload the whole page, or call UserProfile.$refresh(). Example when signing in:

.service("Auth", ["$http", function ($http) {

  /* ... */

  this.signIn = function (credentials) {
    return $http.post("api/auth", credentials).then(function (response) {
      // authentication succeeded, store the response access token somewhere (if any)
    });
  };

}])

.state("signIn", {
  /* ... */
  controller: "SignInController",
  resolve: {
    /* ... */
    userProfile: "UserProfile"
  }
})

.controller("SignInController", ["$scope", "$state", "Auth", "userProfile", function ($scope, $state, Auth, userProfile) {

  $scope.signIn = function () {
    Auth.signIn($scope.credentials).then(function () {
      // user successfully authenticated, refresh UserProfile
      return userProfile.$refresh();
    }).then(function () {
      // UserProfile is refreshed, redirect user somewhere
      $state.go("home");
    });
  };

}])

Try this command:

git ls-files 

This lists all of the files in the repository, including those that are only staged but not yet committed.

http://www.kernel.org/pub/software/scm/git/docs/git-ls-files.html

UPDATE: Using .NET 4.5 (or .NET 4.0 by adding the Microsoft.Net.Http package from NuGet) this is possible without external code, extensions, and "low level" HTTP manipulation. Here is an example:

// Perform the equivalent of posting a form with a filename and two files, in HTML:
// <form action="{url}" method="post" enctype="multipart/form-data">
//     <input type="text" name="filename" />
//     <input type="file" name="file1" />
//     <input type="file" name="file2" />
// </form>
private async Task<System.IO.Stream> UploadAsync(string url, string filename, Stream fileStream, byte [] fileBytes)
{
    // Convert each of the three inputs into HttpContent objects

    HttpContent stringContent = new StringContent(filename);
    // examples of converting both Stream and byte [] to HttpContent objects
    // representing input type file
    HttpContent fileStreamContent = new StreamContent(fileStream);
    HttpContent bytesContent = new ByteArrayContent(fileBytes);

    // Submit the form using HttpClient and 
    // create form data as Multipart (enctype="multipart/form-data")

    using (var client = new HttpClient())
    using (var formData = new MultipartFormDataContent()) 
    {
        // Add the HttpContent objects to the form data

        // <input type="text" name="filename" />
        formData.Add(stringContent, "filename", "filename");
        // <input type="file" name="file1" />
        formData.Add(fileStreamContent, "file1", "file1");
        // <input type="file" name="file2" />
        formData.Add(bytesContent, "file2", "file2");

        // Invoke the request to the server

        // equivalent to pressing the submit button on
        // a form with attributes (action="{url}" method="post")
        var response = await client.PostAsync(url, formData);

        // ensure the request was a success
        if (!response.IsSuccessStatusCode)
        {
            return null;
        }
        return await response.Content.ReadAsStreamAsync();
    }
}

You can use finish() method or you can use:

android:noHistory="true"

And then there is no need to call finish() anymore.

<activity android:name=".ClassName" android:noHistory="true" ... />

You can use the format method of the DateTime class:

$date = new DateTime('2000-01-01');
$result = $date->format('Y-m-d H:i:s');

If format fails for some reason, it will return FALSE. In some applications, it might make sense to handle the failing case:

if ($result) {
  echo $result;
} else { // format failed
  echo "Unknown Time";
}

let its required n bit then 2^n=(base)^digit and then take log and count no. for n

The reason could be that the summation exceeded the required number of digits - 4. If you increase the size of the decimal to decimal(10,2), it should work

 SELECT SUM(convert(decimal(10,2), Stuff)) as result FROM table

OR

 SELECT SUM(CAST(Stuff AS decimal(6,2))) as result FROM table

Brad Wilson has a couple great articles on unobtrusive validation and unobtrusive ajax.
It is also shown very nicely in this Pluralsight video in the section on " AJAX and JavaScript".

Basically, it is simply Javascript validation that doesn't pollute your source code with its own validation code. This is done by making use of data- attributes in HTML.

I'm not sure if our problem was directly related with installing gulp only locally. But we had to install a bunch of dependencies ourself. This lead to a "huge" package.json and we are not sure if it is really a great idea to install gulp only locally. We had to do so because of our build environment. But I wouldn't recommend installing gulp not globally if it isn't absolutely necessary. We faced similar problems as described in the following blog-post

None of these problems arise for any of our developers on their local machines because they all installed gulp globally. On the build system we had the described problems. If someone is interested I could dive deeper into this issue. But right now I just wanted to mention that it isn't an easy path to install gulp only locally.

Just do it in HTML

<a href="https://www.google.com">Google</a>

Screen Size in Android is grouped into categories small, medium, large, extra large, double-extra and triple-extra. Screen density is the amount of pixels within an area (like inch) of the screen. Generally it is measured in dots-per-inch (dpi). Screen density is grouped as low, medium, high and extra high. Resolution is the total number of pixels in the screen.

• dp: Density Independent Pixel, it varies based on screen density . In 160 dpi screen, 1 dp = 1 pixel. Except for font size, use dp always.
• dip: dip == dp. In earlier Android versions dip was used and later changed to dp.
• sp: Scale Independent Pixel, scaled based on user’s font size preference. Fonts should use sp.
• px: our usual standard pixel which maps to the screen pixel.
• in: inches, with respect to the physical screen size.
• mm: millimeters, with respect to the physical screen size.
• pt: 1/72 of an inch, with respect to the physical screen size.

Formula for Conversion between Units

 px = dp * (dpi / 160)

dp to px in device

Following example may help understand better. The scaling occurs based on bucket size of 120(ldpi), 160(mdpi), 240(hdpi), 320(xhdpi), 480(xxhdpi) and 640(xxxhdpi). The Google suggested ratio for designing is 3:4:6:8:12 for ldpi:mdpi:hdpi:xhdpi:xxhdpi

A 150px X 150px image will occupy,

• 150 dp X 150 dp screen space in mdpi
• 100 dp X 100 dp screen space in hdpi
• 75 dp X 75 dp screen space in xhdpi

You may use the following DPI calculator to fix your image sizes and other dimensions when you wish to have an uniform UI design in all Android devices.

DPI Calculator in Java

/*
Program output
LDPI: 165.0 X 60.0
MDPI: 220.0 X 80.0
HDPI: 330.0 X 120.0
XHDPI: 440.0 X 160.0
XXHDPI: 660.0 X 240.0
XXXHDPI: 880.0 X 320.0
*/


public class DPICalculator {

private final float LDPI = 120;
private final float MDPI = 160;
private final float HDPI = 240;
private final float XHDPI = 320;
private final float XXHDPI = 480;
private final float XXXHDPI = 640;    

private float forDeviceDensity;
private float width;
private float height;

public DPICalculator(float forDeviceDensity, float width, float height){
    this.forDeviceDensity = forDeviceDensity;
    this.width = width;
    this.height = height;
}

public static void main(String... args) {
    DPICalculator dpiCalculator = new DPICalculator(240,330,120);
    dpiCalculator.calculateDPI();
}


private float getPx(float dp, float value) {
    float px = dp * (value / forDeviceDensity );        
    return px;
}

private void calculateDPI() {

    float ldpiW = getPx(LDPI,width);        
    float ldpiH =  getPx(LDPI,height);
    float mdpiW = getPx(MDPI,width);        
    float mdpiH =  getPx(MDPI,height);        
    float hdpiW = getPx(HDPI,width);        
    float hdpiH =  getPx(HDPI,height);       
    float xdpiW = getPx(XHDPI,width);        
    float xdpiH =  getPx(XHDPI,height);
    float xxdpiW = getPx(XXHDPI,width);        
    float xxdpiH =  getPx(XXHDPI,height);
    float xxxdpiW = getPx(XXXHDPI,width);        
    float xxxdpiH =  getPx(XXXHDPI,height);

    System.out.println("LDPI: " + ldpiW + " X " + ldpiH);
    System.out.println("MDPI: " + mdpiW + " X " + mdpiH);
    System.out.println("HDPI: " + hdpiW + " X " + hdpiH);
    System.out.println("XHDPI: " + xdpiW + " X " + xdpiH);
    System.out.println("XXHDPI: " + xxdpiW + " X " + xxdpiH);
    System.out.println("XXXHDPI: " + xxxdpiW + " X " + xxxdpiH);        
   }
}

More Information refer following link.

http://javapapers.com/android/difference-between-dp-dip-sp-px-in-mm-pt-in-android/

Highlight the text you want to uppercase. Then hit CTRL+SHIFT+P to bring up the command palette. Then start typing the word "uppercase", and you'll see the Transform to Uppercase command. Click that and it will make your text uppercase.

Whenever you want to do something in VS Code and don't know how, it's a good idea to bring up the command palette with CTRL+SHIFT+P, and try typing in a keyword for you want. Oftentimes the command will show up there so you don't have to go searching the net for how to do something.

You can add property to your model as follows:

    public string DetailsClass { get { return Details.Count > 0 ? "show" : "hide" } }

and then your view will be simpler and will contain no logic at all:

    <div class="details @Model.DetailsClass"/>

This will work even with many classes and will not render class if it is null:

    <div class="@Model.Class1 @Model.Class2"/>

with 2 not null properties will render:

    <div class="class1 class2"/>

if class1 is null

    <div class=" class2"/>

Check this code :

import java.util.Scanner;

public class Main {

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

    String username ;
    String password;
    String yes_0r_no;
    String scann;
    String passscan;

    Scanner scan = new Scanner(System.in);
    Scanner scanner = new Scanner(System.in);

    Scanner name = new Scanner(System.in);
    System.out.println("Username:");
    username = name.next().toLowerCase();

    Scanner pass = new Scanner(System.in);
    System.out.println("Password:");
    password = pass.next().toLowerCase();


    System.out.println("You are logged in");

    Scanner ask = new Scanner(System.in);
    System.out.println("Do you want to check this or not(yes or no) :");

     yes_0r_no = ask.next().toLowerCase();



    while (true){
        if (yes_0r_no.equals("yes")){
            System.out.println("Username:");
          scann = scan.next().toLowerCase();
          if (scann == username) {
              continue;
          }
        System.out.println("Password");
        passscan = scanner.next().toLowerCase();
        if (passscan.equals(password)) {
            System.out.println("You are logged in");
            break;

        }if (!password.equals(passscan)) {
            throw new IllegalAccessException();
            }
        }

        if (yes_0r_no.equals("no"))
            break ;



    }


}

}

Are you trying to be distinct by more than one field? If so, just use an anonymous type and the Distinct operator and it should be okay:

var query = doc.Elements("whatever")
               .Select(element => new {
                             id = (int) element.Attribute("id"),
                             category = (int) element.Attribute("cat") })
               .Distinct();

If you're trying to get a distinct set of values of a "larger" type, but only looking at some subset of properties for the distinctness aspect, you probably want DistinctBy as implemented in MoreLINQ in DistinctBy.cs:

 public static IEnumerable<TSource> DistinctBy<TSource, TKey>(
     this IEnumerable<TSource> source,
     Func<TSource, TKey> keySelector,
     IEqualityComparer<TKey> comparer)
 {
     HashSet<TKey> knownKeys = new HashSet<TKey>(comparer);
     foreach (TSource element in source)
     {
         if (knownKeys.Add(keySelector(element)))
         {
             yield return element;
         }
     }
 }

(If you pass in null as the comparer, it will use the default comparer for the key type.)

To execute your command directly from within C#, you would use the SqlCommand class.

Quick sample code using paramaterized SQL (to avoid injection attacks) might look like this:

string queryString = "SELECT tPatCulIntPatIDPk, tPatSFirstname, tPatSName, tPatDBirthday  FROM  [dbo].[TPatientRaw] WHERE tPatSName = @tPatSName";
string connectionString = "Server=.\PDATA_SQLEXPRESS;Database=;User Id=sa;Password=2BeChanged!;";

using (SqlConnection connection = new SqlConnection(connectionString))
{
    SqlCommand command = new SqlCommand(queryString, connection);
    command.Parameters.AddWithValue("@tPatSName", "Your-Parm-Value");
    connection.Open();
    SqlDataReader reader = command.ExecuteReader();
    try
    {
        while (reader.Read())
        {
            Console.WriteLine(String.Format("{0}, {1}",
            reader["tPatCulIntPatIDPk"], reader["tPatSFirstname"]));// etc
        }
    }
    finally
    {
        // Always call Close when done reading.
        reader.Close();
    }
}

Update for PHP 7 (thanks shock_gone_wild)

PHP 7 introduces the so called null coalescing operator which simplifies the below statements to:

$var = $var ?? "default";

Before PHP 7

No, there is no special operator or special syntax for this. However, you could use the ternary operator:

$var = isset($var) ? $var : "default";

Or like this:

isset($var) ?: $var = 'default';

In C++ you can overload operator<< for ostream and your custom class:

class A {
public:
  int i;
};

std::ostream& operator<<(std::ostream &strm, const A &a) {
  return strm << "A(" << a.i << ")";
}

This way you can output instances of your class on streams:

A x = ...;
std::cout << x << std::endl;

In case your operator<< wants to print out internals of class A and really needs access to its private and protected members you could also declare it as a friend function:

class A {
private:
  friend std::ostream& operator<<(std::ostream&, const A&);
  int j;
};

std::ostream& operator<<(std::ostream &strm, const A &a) {
  return strm << "A(" << a.j << ")";
}

In a Linux server, using default implementation of ses will expect files in .aws/credentials file. You can put following content in credential file at the location below and it will work. /home/local/<your service account>/.aws/credentials.

[default]
aws_access_key_id=<your access key>
aws_secret_access_key=<your secret access key>

"location" directive should be inside a 'server' directive, e.g.

server {
    listen       8765;

    location / {
        resolver 8.8.8.8;
        proxy_pass http://$http_host$uri$is_args$args;
    }

    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   html;
    }
}

This is how I do it in FreeBSD:

#!/usr/local/bin/bash
for i in $(ipcs -a | grep "^s" | awk '{ print $2 }');
do
        echo "ipcrm -s $i"
        ipcrm -s $i
done

sep='\t' is often used for Tab-delimited file.

There is an issue with iOS not registering click/touch events bound to elements added after DOM loads.

While PPK has this advice: http://www.quirksmode.org/blog/archives/2010/09/click_event_del.html

I've found this the easy fix, simply add this to the css:

cursor: pointer;

Hi this happens when the front end and backend is running on different ports. The browser blocks the responses from the backend due to the absence on CORS headers. The solution is to make add the CORS headers in the backend request. The easiest way is to use cors npm package.

var express = require('express')
var cors = require('cors')
var app = express()
app.use(cors())

This will enable CORS headers in all your request. For more information you can refer to cors documentation

https://www.npmjs.com/package/cors

To create AAR

while creating follow below steps.

File->New->New Module->Android Library and create.

To generate AAR

Go to gradle at top right pane in android studio follow below steps.

Gradle->Drop down library name -> tasks-> build-> assemble or assemble release

AAR will be generated in build/outputs/aar/

But if we want AAR to get generated in specific folder in project directory with name you want, modify your app level build.gradle like below

defaultConfig {
    minSdkVersion 26
    targetSdkVersion 28
    versionCode System.getenv("BUILD_NUMBER") as Integer ?: 1
    versionName "0.0.${versionCode}"


    libraryVariants.all { variant ->

        variant.outputs.all { output ->
            outputFileName = "/../../../../release/" + ("your_recommended_name.aar")
        }
    }
}

Now it will create folder with name "release" in project directory which will be having AAR.

To import "aar" into project,check below link.

How to manually include external aar package using new Gradle Android Build System

I had quite a number of these exceptions thrown, the fastest and easiest way I found to solve them was to find unique values in the exceptions which I then searched for in the storyboard source code. This helped me to find the actual view(s) and constraint(s) causing the problem (I use meaningful userLabels on all of the views, which makes it a lot easier to track the constraints and views)...

So, using the above exceptions I would open the storyboard as "source code" in xcode (or another editor) and look for something I can find...

<NSLayoutConstraint:0x72bf860 V:[UILabel:0x72bf7c0(17)]> 

.. this looks like a vertical (V) constraint on a UILabel with a value of (17).

Looking through the exceptions I also find

<NSLayoutConstraint:0x72c22b0 V:[UILabel:0x72bf7c0]-(NSSpace(8))-[UIButton:0x886efe0]>

Which looks like the UILabel(0x72bf7c0) is close to a UIButton(0x886efe0) with some vertical spacing (8)..

That will hopefully be enough for me to find the specific views in the storyboard source code (probably by searching the text for "17" initially), or at least a few likely candidates. From there I should be able to actually figure out which views these are in the storyboard which will make it a lot easier to identify the problem (look for "duplicated" pinning or pinning that conflicts with size constraints).

You are declaring a local variable, not a class variable. To set an instance variable (attribute), use

class Example(object):
    def the_example(self):
        self.itsProblem = "problem"  # <-- remember the 'self.'

theExample = Example()
theExample.the_example()
print(theExample.itsProblem)

To set a class variable (a.k.a. static member), use

class Example(object):
    def the_example(self):
        Example.itsProblem = "problem"
        # or, type(self).itsProblem = "problem"
        # depending what you want to do when the class is derived.

Honestly, with 8 objects max and 8 properties max per object, your best bet is to just traverse each object and make the comparisons directly. It'll be fast and it'll be easy.

If you're going to be using these types of comparisons often, then I agree with Jason about JSON serialization...but otherwise there's no need to slow down your app with a new library or JSON serialization code.

With C++17 you can use std::basic_string_view & with C++20 std::basic_string::starts_with or std::basic_string_view::starts_with.

The benefit of std::string_view in comparison to std::string - regarding memory management - is that it only holds a pointer to a "string" (contiguous sequence of char-like objects) and knows its size. Example without moving/copying the source strings just to get the integer value:

#include <exception>
#include <iostream>
#include <string>
#include <string_view>

int main()
{
    constexpr auto argument = "--foo=42"; // Emulating command argument.
    constexpr auto prefix = "--foo=";
    auto inputValue = 0;

    constexpr auto argumentView = std::string_view(argument);
    if (argumentView.starts_with(prefix))
    {
        constexpr auto prefixSize = std::string_view(prefix).size();
        try
        {
            // The underlying data of argumentView is nul-terminated, therefore we can use data().
            inputValue = std::stoi(argumentView.substr(prefixSize).data());
        }
        catch (std::exception & e)
        {
            std::cerr << e.what();
        }
    }
    std::cout << inputValue; // 42
}

Even if fileno(FILE *) may return a file descriptor, be VERY careful not to bypass stdio's buffer. If there is buffer data (either read or unflushed write), reads/writes from the file descriptor might give you unexpected results.

To answer one of the side questions, to convert a file descriptor to a FILE pointer, use fdopen(3)

Most answers are pertaining to doing it on code. But I'll give you one that works on Storyboard. Yes! You read it right.

• Click on main UINavigationController and navigate to it's Identity Inspector tab.

• Under User Defined Runtime Attributes, set a single runtime property called interactivePopGestureRecognizer.enabled to true. Or graphically, you'd have to enable the checkbox as shown in the image below.

That's it. You're good to go. Your back gesture will work as if it was there all along.

MoreLinq has something useful for this MoreLinq.Source.MoreEnumerable.ExceptBy

https://github.com/gsscoder/morelinq/blob/master/MoreLinq/ExceptBy.cs

namespace MoreLinq
{
    using System;
    using System.Collections.Generic;
    using System.Linq;

    static partial class MoreEnumerable
    {
        /// <summary>
        /// Returns the set of elements in the first sequence which aren't
        /// in the second sequence, according to a given key selector.
        /// </summary>
        /// <remarks>
        /// This is a set operation; if multiple elements in <paramref name="first"/> have
        /// equal keys, only the first such element is returned.
        /// This operator uses deferred execution and streams the results, although
        /// a set of keys from <paramref name="second"/> is immediately selected and retained.
        /// </remarks>
        /// <typeparam name="TSource">The type of the elements in the input sequences.</typeparam>
        /// <typeparam name="TKey">The type of the key returned by <paramref name="keySelector"/>.</typeparam>
        /// <param name="first">The sequence of potentially included elements.</param>
        /// <param name="second">The sequence of elements whose keys may prevent elements in
        /// <paramref name="first"/> from being returned.</param>
        /// <param name="keySelector">The mapping from source element to key.</param>
        /// <returns>A sequence of elements from <paramref name="first"/> whose key was not also a key for
        /// any element in <paramref name="second"/>.</returns>

        public static IEnumerable<TSource> ExceptBy<TSource, TKey>(this IEnumerable<TSource> first,
            IEnumerable<TSource> second,
            Func<TSource, TKey> keySelector)
        {
            return ExceptBy(first, second, keySelector, null);
        }

        /// <summary>
        /// Returns the set of elements in the first sequence which aren't
        /// in the second sequence, according to a given key selector.
        /// </summary>
        /// <remarks>
        /// This is a set operation; if multiple elements in <paramref name="first"/> have
        /// equal keys, only the first such element is returned.
        /// This operator uses deferred execution and streams the results, although
        /// a set of keys from <paramref name="second"/> is immediately selected and retained.
        /// </remarks>
        /// <typeparam name="TSource">The type of the elements in the input sequences.</typeparam>
        /// <typeparam name="TKey">The type of the key returned by <paramref name="keySelector"/>.</typeparam>
        /// <param name="first">The sequence of potentially included elements.</param>
        /// <param name="second">The sequence of elements whose keys may prevent elements in
        /// <paramref name="first"/> from being returned.</param>
        /// <param name="keySelector">The mapping from source element to key.</param>
        /// <param name="keyComparer">The equality comparer to use to determine whether or not keys are equal.
        /// If null, the default equality comparer for <c>TSource</c> is used.</param>
        /// <returns>A sequence of elements from <paramref name="first"/> whose key was not also a key for
        /// any element in <paramref name="second"/>.</returns>

        public static IEnumerable<TSource> ExceptBy<TSource, TKey>(this IEnumerable<TSource> first,
            IEnumerable<TSource> second,
            Func<TSource, TKey> keySelector,
            IEqualityComparer<TKey> keyComparer)
        {
            if (first == null) throw new ArgumentNullException("first");
            if (second == null) throw new ArgumentNullException("second");
            if (keySelector == null) throw new ArgumentNullException("keySelector");
            return ExceptByImpl(first, second, keySelector, keyComparer);
        }

        private static IEnumerable<TSource> ExceptByImpl<TSource, TKey>(this IEnumerable<TSource> first,
            IEnumerable<TSource> second,
            Func<TSource, TKey> keySelector,
            IEqualityComparer<TKey> keyComparer)
        {
            var keys = new HashSet<TKey>(second.Select(keySelector), keyComparer);
            foreach (var element in first)
            {
                var key = keySelector(element);
                if (keys.Contains(key))
                {
                    continue;
                }
                yield return element;
                keys.Add(key);
            }
        }
    }
}

You are looking for --build-arg and the ARG instruction. These are new as of Docker 1.9. Check out https://docs.docker.com/engine/reference/builder/#arg. This will allow you to add ARG arg to the Dockerfile and then build with docker build --build-arg arg=2.3 ..

You need to use a SimpleDateFormat (dd-MM-yyyy will be the format) to parse the 2 input strings to Date objects and then use the Date#before(otherDate) (or) Date#after(otherDate) to compare them.

Try to implement the code yourself.

You have to use start and $NUL for this in Windows PowerShell:

Type in this command assuming mySum is the name of your application and 5 10 are command line arguments you are sending.

start .\mySum  5 10 > $NUL 2>&1

The start command will start a detached process, a similar effect to &. The /B option prevents start from opening a new terminal window if the program you are running is a console application. and NUL is Windows' equivalent of /dev/null. The 2>&1 at the end will redirect stderr to stdout, which will all go to NUL.

For Dot Net Core 3, Microsoft.Data.SqlClient should be used.

If setting a fixed width on the image is not an option, here's an alternative solution.

Having a parent div with display: table & table-layout: fixed. Then setting the image to display: table-cell and max-width to 100%. That way the image will fit to the width of its parent.

Example:

<style>
    .wrapper { float: left; clear: left; display: table; table-layout: fixed; }
    img.img-responsive { display: table-cell; max-width: 100%; }
</style>
<div class="wrapper col-md-3">
    <img class="img-responsive" src="https://www.google.co.uk/images/srpr/logo11w.png"/>
</div>

Fiddle: http://jsfiddle.net/5y62c4af/

There is an important and subtle issue that none of them addresses directly. There are two ways of considering type in C#: static type and run-time type.

Static type is the type of a variable in your source code. It is therefore a compile-time concept. This is the type that you see in a tooltip when you hover over a variable or property in your development environment.

You can obtain static type by writing helper generic method to let type inference take care of it for you:

   Type GetStaticType<T>(T x) { return typeof(T); }

Run-time type is the type of an object in memory. It is therefore a run-time concept. This is the type returned by the GetType() method.

An object's run-time type is frequently different from the static type of the variable, property, or method that holds or returns it. For example, you can have code like this:

object o = "Some string";

The static type of the variable is object, but at run time, the type of the variable's referent is string. Therefore, the next line will print "System.String" to the console:

Console.WriteLine(o.GetType()); // prints System.String

But, if you hover over the variable o in your development environment, you'll see the type System.Object (or the equivalent object keyword). You also see the same using our helper function from above:

Console.WriteLine(GetStaticType(o)); // prints System.Object

For value-type variables, such as int, double, System.Guid, you know that the run-time type will always be the same as the static type, because value types cannot serve as the base class for another type; the value type is guaranteed to be the most-derived type in its inheritance chain. This is also true for sealed reference types: if the static type is a sealed reference type, the run-time value must either be an instance of that type or null.

Conversely, if the static type of the variable is an abstract type, then it is guaranteed that the static type and the runtime type will be different.

To illustrate that in code:

// int is a value type
int i = 0;
// Prints True for any value of i
Console.WriteLine(i.GetType() == typeof(int));

// string is a sealed reference type
string s = "Foo";
// Prints True for any value of s
Console.WriteLine(s == null || s.GetType() == typeof(string));

// object is an unsealed reference type
object o = new FileInfo("C:\\f.txt");
// Prints False, but could be true for some values of o
Console.WriteLine(o == null || o.GetType() == typeof(object));

// FileSystemInfo is an abstract type
FileSystemInfo fsi = new DirectoryInfo("C:\\");
// Prints False for all non-null values of fsi
Console.WriteLine(fsi == null || fsi.GetType() == typeof(FileSystemInfo));

I think Todd is correct, but I think there's one other thing you should consider. You can reliably get the home directory from the JVM at runtime, and then you can create files objects relative to that location. It's not that much more trouble, and it's something you'll appreciate if you ever move to another computer or operating system.

File homedir = new File(System.getProperty("user.home"));
File fileToRead = new File(homedir, "java/ex.txt");

To solve this, connect to SQL Management Studio using Windows Authentication, then right-click on server node Properties->Security and enable SQL Server and Windows Authentication mode. If you're using 'sa' make sure the account is enabled. To do this open 'sa' under Logins and view Status.

If this didn't work, you may need to reinstall SQL Server

You can use the PHP isset() function to test whether a variable is set or not. The isset() will return FALSE if testing a variable that has been set to NULL. Example:

<?php
    $var1 = '';
    if(isset($var1)){
        echo 'This line is printed, because the $var1 is set.';
    }
?>

This code will output "This line is printed, because the $var1 is set."

read more in https://stackhowto.com/how-to-check-if-a-variable-is-undefined-in-php/

You can use standard JS toFixed method

var num = 5.56789;
var n=num.toFixed(2);

//5.57

In order to add commas (to separate 1000's) you can add regexp as follows (where num is a number):

num.toString().replace(/(\d)(?=(\d\d\d)+(?!\d))/g, "$1,")

//100000 => 100,000
//8000 => 8,000
//1000000 => 1,000,000

Complete example:

var value = 1250.223;
var num = '$' + value.toFixed(2).replace(/(\d)(?=(\d\d\d)+(?!\d))/g, "$1,");

//document.write(num) would write value as follows: $1,250.22

Separation character depends on country and locale. For some countries it may need to be .

In the beaten-up MVC pattern, the Servlet is "C" - controller.

Its main job is to do initial request evaluation and then dispatch the processing based on the initial evaluation to the specific worker. One of the worker's responsibilities may be to setup some presentation layer beans and forward the request to the JSP page to render HTML. So, for this reason alone, you need to pass the request object to the service layer.

I would not, though, start writing raw Servlet classes. The work they do is very predictable and boilerplate, something that framework does very well. Fortunately, there are many available, time-tested candidates ( in the alphabetical order ): Apache Wicket, Java Server Faces, Spring to name a few.

You can also use form tag. Example:

<div class="dropdown-menu">
    <form>
        Anything inside this wont close the dropdown!
        <button class="btn btn-primary" type="button" value="Click me!"/>
    </form>
    <div class="dropdown-divider"></div>
    <a class="dropdown-item" href="#">Clik this and the dropdown will be closed</a>
    <a class="dropdown-item" href="#">This too</a>
</div>

Source: https://getbootstrap.com/docs/5.0/components/dropdowns/#forms

See this:

SELECT name FROM sqlite_master
WHERE type='table'
ORDER BY name;

You can do $this->getRequest()->query->all(); to get all GET params and $this->getRequest()->request->all(); to get all POST params.

So in your case:

$params = $this->getRequest()->request->all();
$params['value1'];
$params['value2'];

For more info about the Request class, see http://api.symfony.com/2.8/Symfony/Component/HttpFoundation/Request.html

Check if you are using session_write_close(); anywhere, I was using this right after another session and then trying to write to the session again and it wasn't working.. so just comment that sh*t out

someClassWithinYourSourceDir.getClass().getResourceAsStream();

AFAIK the json module was added in version 2.6, see here. I'm guessing you can update your python installation to the latest stable 2.6 from this page.

svn propset "svn:ignore" "*.xml" .

the *.xml is the pattern of files to ignore; you can use directory names here as well.

You should check the textarea is null before you use val() otherwise, you will get undefined error.

if ($('textarea#message') != undefined) {
   var message = $('textarea#message').val();
}

Then, you could do whatever with message.

You could specify the width of all but the last table cells and add a table-layout:fixed and a width to the table.

You could set

table tr ul.actions {margin: 0; white-space:nowrap;}

(or set this for the last TD as Sander suggested instead).

This forces the inline-LIs not to break. Unfortunately this does not lead to a new width calculation in the containing UL (and this parent TD), and therefore does not autosize the last TD.

This means: if an inline element has no given width, a TD's width is always computed automatically first (if not specified). Then its inline content with this calculated width gets rendered and the white-space-property is applied, stretching its content beyond the calculated boundaries.

So I guess it's not possible without having an element within the last TD with a specific width.

Lot of the information above led me to further research and ultimately my answer so I wanted to contribute what I wound up doing in hopes it helps someone else:

• I also wanted to pass a varied number of variables to a batch file so that they could be processed within the file.

• I was ok with passing them to the batch file using quotes

• I would want them processed similar to the below - but using a loop instead of writing out manually:

So I wanted to execute this:

prog_ZipDeleteFiles.bat "_appPath=C:\Services\Logs\PCAP" "_appFile=PCAP*.?"

And via the magic of for loops do this within the batch file:

set "_appPath=C:\Services\Logs\PCAP"
set "_appFile=PCAP*.?"

Problem I was having is that all my attempts to use a for loop weren't working. The below example:

for /f "tokens* delims= " in %%A (%*) DO (
   set %%A
)

would just do:

set "_appPath=C:\Services\Logs\PCAP"

and not:

set "_appPath=C:\Services\Logs\PCAP"
set "_appFile=PCAP*.?"

even after setting

SETLOCAL EnableDelayedExpansion

Reason was that the for loop read the whole line and assigned my second parameter to %%B during the first iteration of the loop. Because %* represents all arguments, there is only a single line to process - ergo only one pass of the for loop happens. This is by design it turns out, and my logic was wrong.

So I stopped trying to use a for loop and simplified what I was trying to do by using if, shift, and a goto statement. Agreed its a bit of a hack but it's more suited to my needs. I can loop through all of the arguments and then use an if statement to drop out of the loop once I process them all.

The winning statement for what I was trying to accomplish:

echo on
:processArguments
:: Process all arguments in the order received
if defined %1 then (
    set %1
    shift
    goto:processArguments
) ELSE (
    echo off 
)

UPDATE - I had to modify to the below instead, I was exposing all of the environment variables when trying to reference %1 and using shift in this manner:

echo on
shift
:processArguments
:: Process all arguments in the order received
if defined %0 then (
    set %0
    shift
    goto:processArguments
) ELSE (
    echo off 
)

I realize this is an old thread, but @alex 's answer needs to be marked as the correct answer

element.getBoundingClientRect() is an exact match to jQuery's $(element).offset()

And it's compatible with IE4+ ... https://developer.mozilla.org/en-US/docs/Web/API/Element.getBoundingClientRect

echo "<span style = 'font-color: #ff0000'> Movie List for {$key} 2013 </span>";

Variables are only expanded inside double quotes, not single quotes. Since the above uses double quotes for the PHP string, I switched to single quotes for the embedded HTML, to avoid having to escape the quotes.

The other problem with your code is that <style> tags are for entering CSS blocks, not for styling individual elements. To style an element, you need an element tag with a style attribute; <span> is the simplest element -- it doesn't have any formatting of its own, it just serves as a place to attach attributes.

Another popular way to write it is with string concatenation:

echo '<span style = "font-color: #ff0000"> Movie List for ' . $key . ' 2013 </span>';

Add this connection string tag in web.config file:

<connectionStrings>
  <add name="itmall" 
    connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=D:\19-02\ABCC\App_Data\abcc.mdf;Integrated Security=True;User Instance=True"/>
</connectionStrings>

And use it like you mentioned. :)

I ran into this issue when I had defined the module in the Angular controller but neglected to set the app name in my HTML file. For example:

<html ng-app>

instead of the correct:

<html ng-app="myApp">

when I had defined something like:

angular.module('myApp', []).controller(...

and referenced it in my HTML file.

You are always passing in true to the toggleMethod, so it will always "show" the table. I would create a global variable that you can flip inside the toggle method instead.

Alternatively you can check the visibility state of the table instead of an explicit variable

My guess is that the fastest of all ways is to hard code the primes in your code.

So why not just write a slow script that generates another source file that has all numbers hardwired in it, and then import that source file when you run your actual program.

Of course, this works only if you know the upper bound of N at compile time, but thus is the case for (almost) all project Euler problems.

PS: I might be wrong though iff parsing the source with hard-wired primes is slower than computing them in the first place, but as far I know Python runs from compiled .pyc files so reading a binary array with all primes up to N should be bloody fast in that case.

  is a HTML entity. When doing .text(), all HTML entities are decoded to their character values.

Instead of comparing using the entity, compare using the actual raw character:

var x = td.text();
if (x == '\xa0') { // Non-breakable space is char 0xa0 (160 dec)
  x = '';
}

Or you can also create the character from the character code manually it in its Javascript escaped form:

var x = td.text();
if (x == String.fromCharCode(160)) { // Non-breakable space is char 160
  x = '';
}

More information about String.fromCharCode is available here:

fromCharCode - MDC Doc Center

More information about character codes for different charsets are available here:

Windows-1252 Charset
UTF-8 Charset

It is possible the other branch you try to pull from is out of synch; so before adding and removing remote try to (if you are trying to pull from master)

git pull origin master

for me that simple call solved those error messages:

• fatal: 'master' does not appear to be a git repository
• fatal: Could not read from remote repository.

My implementation:

import math
n = 100
marked = {}
for i in range(2, int(math.sqrt(n))):
    if not marked.get(i):
        for x in range(i * i, n, i):
            marked[x] = True

for i in range(2, n):
    if not marked.get(i):
        print i

If you want to revert the file to its state in master:

git checkout origin/master [filename]

Problem 1: MatInputModule Not imported

import MatInputModule and MatFormFieldModule inside module i.e. app.module.ts

import { MatInputModule } from '@angular/material/input';
import { MatFormFieldModule } from "@angular/material/form-field";

Problem 2: Spellings Mistake

Be sure to add matInput and it is case-sensitive.

<input matInput type="text" />

Problem 3: Still compiler giving ERROR

if angular compiler still giving error after fixing above given problems then you must try with restarting the app.

ng serve

For what it's worth, to be a single-line solution, the below is a working solution for me.

$currFolderName = (Get-Location).Path.Substring((Get-Location).Path.LastIndexOf("\")+1)

The 1 at the end is to ignore the /.

Thanks to the posts above using the Get-Location cmdlet.

Just iterate over the elements. Like this:

for (int i = numElements - 1; i >= 0; i--) 
    cout << array[i];

Note: As Maxim Egorushkin pointed out, this could overflow. See his comment below for a better solution.

To add further explanation, code inside Blade {{ }} statements are automatically passed through the htmlspecialchars() function that php provides. This function takes in a string and will find all reserved characters that HTML uses. Reserved characters are & < > and ". It will then replace these reserved characters with their HTML entity variant. Which are the following:

|---------------------|------------------|
|      Character      |       Entity     |
|---------------------|------------------|
|          &          |       &      |
|---------------------|------------------|
|          <          |       &lt;       |
|---------------------|------------------|
|          >          |       &gt;       |
|---------------------|------------------|
|          "          |       &quot;     |
|---------------------|------------------|

For example, assume we have the following php statement:

$hello = "<b>Hello</b>";

Passed into blade as {{ $hello }} would yield the literal string you passed:

<b>Hello</b>

Under the hood, it would actually echo as <b>Hello<b&gt

If we wanted to bypass this and actually render it as a bold tag, we escape the htmlspecialchars() function by adding the escape syntax blade provides:

{!! $hello !!}

Note that we only use one curly brace.

The output of the above would yield:

Hello

We could also utilise another handy function that php provides, which is the html_entity_decode() function. This will convert HTML entities to their respected HTML characters. Think of it as the reverse of htmlspecialchars()

For example say we have the following php statement:

$hello = "<b> Hello <b>";

We could now add this function to our escaped blade statement:

{!! html_entity_decode($hello) !!}

This will take the HTML entity < and parse it as HTML code <, not just a string.

The same will apply with the greater than entity >

which would yield

Hello

The whole point of escaping in the first place is to avoid XSS attacks. So be very careful when using escape syntax, especially if users in your application are providing the HTML themselves, they could inject their own code as they please.

This worked for me.

const requestOptions = {
method: 'GET',
headers: { 'Content-Type': 'application/json' }
};

fetch(`${url}`, requestOptions)
.then((res) => {
    return res.blob();
})
.then((blob) => {
    const href = window.URL.createObjectURL(blob);
    const link = document.createElement('a');
    link.href = href;
    link.setAttribute('download', 'config.json'); //or any other extension
    document.body.appendChild(link);
    link.click();
})
.catch((err) => {
    return Promise.reject({ Error: 'Something Went Wrong', err });
})

I think the difference between the two boils down to access. Environment variables are accessible by any process and Java system properties are only accessible by the process they are added to.

Also as Bohemian stated, env variables are set in the OS (however they 'can' be set through Java) and system properties are passed as command line options or set via setProperty().

Download the class.pdf2text.php @ https://pastebin.com/dvwySU1a or http://www.phpclasses.org/browse/file/31030.html (Registration required)

Code:

include('class.pdf2text.php');
$a = new PDF2Text();
$a->setFilename('filename.pdf'); 
$a->decodePDF();
echo $a->output(); 

• class.pdf2text.php Project Home

• pdf2textclass doesn't work with all the PDF's I've tested, If it doesn't work for you, try PDF Parser

I solved the same problem by changing this from false to true. in the end I went into the database and changed my bit field to allow null, and then refreshed my xsd, and refreshed my wsdl and reference.cs and now all is well.

this.columnAttachPDFToEmailFlag.AllowDBNull = true;

The following codes can be used:

@app.route('/api/add_message/<uuid>', methods=['GET', 'POST'])
def add_message(uuid):
  content = request.json['text']
  print content
  return uuid

Here is a screenshot of me getting the json data:

You can see that what is returned is a dictionary type of data.

To make an example of Clairton Luz work, you need to run in the FXApplicationThread and insert into Platform.runLater method your code snippet:

  Platform.runLater(() -> {
                        Alert alert = new Alert(Alert.AlertType.ERROR);
                        alert.setTitle("Error Dialog");
                        alert.setHeaderText("No information.");

                        alert.showAndWait();
                    }
            );

Otherwise, you'll get: java.lang.IllegalStateException: Not on FX application thread

in controller:

JSONObject jsonobject=new JSONObject();
jsonobject.put("error","Invalid username");
response.getWriter().write(jsonobject.toString());

in javascript:

f(data!=success){



 var errorMessage=jQuery.parseJson(data);
  alert(errorMessage.error);
}

All the other answers use variables and SET operations. Here's a way to do it within a select statement. Just drop this in as a column in your existing select.

    (SELECT 
        '<table style=''font-family:"Verdana"; font-size: 10pt''>'
                    + '<tr bgcolor="#9DBED4"><th>col1</th><th>col2</th><th>col3</th><th>col4</th><th>col5</th></tr>'
                    + replace( replace( body, '&lt;', '<' ), '&gt;', '>' )
                    + '</table>'
    FROM
    (
        select cast( (
            select td = cast(col1 as varchar(5)) + '</td><td align="right">' + col2 + '</td><td>' + col3 + '</td><td align="right">' + cast(col4 as varchar(5)) + '</td><td align="right">' + cast(col5 as varchar(5)) + '</td>'
            from (
                    select col1  = col1,
                            col2 = col2,
                            col3 = col3,
                            col4 = col4,
                            col5 = col5
                    from m_LineLevel as onml
                    where onml.pkey = oni.pkey
                    ) as d
            for xml path( 'tr' ), type ) as varchar(max) ) as body
    ) as bodycte) as LineTable

I had similar issues with Angular6 . After going through many posts. I had to import FormsModule as below in app.module.ts .

import {FormsModule} from '@angular/forms';

Then my ngModel tag worked . Please try this.

<select [(ngModel)]='nrSelect' class='form-control'>                                                                
                                <option [ngValue]='47'>47</option>
                                    <option [ngValue]='46'>46</option>
                                    <option [ngValue]='45'>45</option>
</select>

In ASP.NET 2.1, In StartUp.cs Add This Services:

services.AddHttpContextAccessor();
services.TryAddSingleton<IActionContextAccessor, ActionContextAccessor>();

and then do 3 step:

1. Define a variable in your MVC controller

   private IHttpContextAccessor _accessor;
   

2. DI into the controller's constructor

   public SomeController(IHttpContextAccessor accessor)
   {
       _accessor = accessor;
   }
   

3. Retrieve the IP Address

   _accessor.HttpContext.Connection.RemoteIpAddress.ToString()
   

This is how it is done.

If your dropdown is Asp.Net drop down then below code will work fine,

 $("#<%=DropDownName.ClientID%>")[0].selectedIndex=0;

But if your DropDown is HTML drop down then this code will work.

 $("#DropDownName")[0].selectedIndex=0;

You can use openopt package and its NLP method. It has many dynamic programming algorithms to solve nonlinear algebraic equations consisting:
goldenSection, scipy_fminbound, scipy_bfgs, scipy_cg, scipy_ncg, amsg2p, scipy_lbfgsb, scipy_tnc, bobyqa, ralg, ipopt, scipy_slsqp, scipy_cobyla, lincher, algencan, which you can choose from.
Some of the latter algorithms can solve constrained nonlinear programming problem. So, you can introduce your system of equations to openopt.NLP() with a function like this:

lambda x: x[0] + x[1]**2 - 4, np.exp(x[0]) + x[0]*x[1]

First, let's make some test data:

create table client (client_id integer not null primary key auto_increment,
                     name varchar(64));
create table portfolio (portfolio_id integer not null primary key auto_increment,
                        client_id integer references client.id,
                        cash decimal(10,2),
                        stocks decimal(10,2));
insert into client (name) values ('John Doe'), ('Jane Doe');
insert into portfolio (client_id, cash, stocks) values (1, 11.11, 22.22),
                                                       (1, 10.11, 23.22),
                                                       (2, 30.30, 40.40),
                                                       (2, 40.40, 50.50);

If you didn't need the portfolio ID, it would be easy:

select client_id, name, max(cash + stocks)
from client join portfolio using (client_id)
group by client_id

+-----------+----------+--------------------+
| client_id | name     | max(cash + stocks) |
+-----------+----------+--------------------+
|         1 | John Doe |              33.33 | 
|         2 | Jane Doe |              90.90 | 
+-----------+----------+--------------------+

Since you need the portfolio ID, things get more complicated. Let's do it in steps. First, we'll write a subquery that returns the maximal portfolio value for each client:

select client_id, max(cash + stocks) as maxtotal
from portfolio
group by client_id

+-----------+----------+
| client_id | maxtotal |
+-----------+----------+
|         1 |    33.33 | 
|         2 |    90.90 | 
+-----------+----------+

Then we'll query the portfolio table, but use a join to the previous subquery in order to keep only those portfolios the total value of which is the maximal for the client:

 select portfolio_id, cash + stocks from portfolio 
 join (select client_id, max(cash + stocks) as maxtotal 
       from portfolio
       group by client_id) as maxima
 using (client_id)
 where cash + stocks = maxtotal

+--------------+---------------+
| portfolio_id | cash + stocks |
+--------------+---------------+
|            5 |         33.33 | 
|            6 |         33.33 | 
|            8 |         90.90 | 
+--------------+---------------+

Finally, we can join to the client table (as you did) in order to include the name of each client:

select client_id, name, portfolio_id, cash + stocks
from client
join portfolio using (client_id)
join (select client_id, max(cash + stocks) as maxtotal
      from portfolio 
      group by client_id) as maxima
using (client_id)
where cash + stocks = maxtotal

+-----------+----------+--------------+---------------+
| client_id | name     | portfolio_id | cash + stocks |
+-----------+----------+--------------+---------------+
|         1 | John Doe |            5 |         33.33 | 
|         1 | John Doe |            6 |         33.33 | 
|         2 | Jane Doe |            8 |         90.90 | 
+-----------+----------+--------------+---------------+

Note that this returns two rows for John Doe because he has two portfolios with the exact same total value. To avoid this and pick an arbitrary top portfolio, tag on a GROUP BY clause:

select client_id, name, portfolio_id, cash + stocks
from client
join portfolio using (client_id)
join (select client_id, max(cash + stocks) as maxtotal
      from portfolio 
      group by client_id) as maxima
using (client_id)
where cash + stocks = maxtotal
group by client_id, cash + stocks

+-----------+----------+--------------+---------------+
| client_id | name     | portfolio_id | cash + stocks |
+-----------+----------+--------------+---------------+
|         1 | John Doe |            5 |         33.33 | 
|         2 | Jane Doe |            8 |         90.90 | 
+-----------+----------+--------------+---------------+

The error is legitimate and may prevent your app from crashing. You typed makes as an array but it can also be undefined.

You have 2 options (instead of disabling the typescript's reason for existing...):

1. In your case the best is to type makes as possibily undefined.

makes?: any[]
// or
makes: any[] | undefined

In this case the compiler will inform you whenever you try to access to makes that it could be undefined. For exemple if the // <-- Not ok lines below are executed before getMakes finished or if getMakes fails, your app will crash and a runetime error will be thrown.

makes[0] // <-- Not ok
makes.map(...) // <-- Not ok

if (makes) makes[0] // <-- Ok
makes?.[0] // <-- Ok
(makes ?? []).map(...) // <-- Ok

2. You can assume that it will never fail and that you will never try to access it before initialization by writing the code below (risky!). So the compiler won't take care about it.

makes!: any[]

The accepted answer works but can got complicated when I wanted to try adding Accept headers. This is what I ended up with. It seems simpler to me so I think I'll stick with it in the future:

client.DefaultRequestHeaders.Add("Accept", "application/*+xml;version=5.1");
client.DefaultRequestHeaders.Add("Authorization", "Basic " + authstring);

It depends on the host, but you probably simply can't (you can't on my shared host on Rackspace Cloud Sites - I asked them).

What you can do is set up an environment on your dev machine that roughly matches your shared host, and do all of your management through the command line locally. Then when everything is set (you've pulled in all the dependencies, updated, managed with git, etc.) you can "push" that to your shared host over (s)FTP.

You can try this:

@OneToOne(cascade = CascadeType.REFRESH) 

or

@OneToMany(cascade = CascadeType.REFRESH)

It looks OK apart from the space in your ID attribute, which is not valid, and the fact that you're replacing the value of your input before checking the selection.

function textbox()_x000D_
{_x000D_
        var ctl = document.getElementById('Javascript_example');_x000D_
        var startPos = ctl.selectionStart;_x000D_
        var endPos = ctl.selectionEnd;_x000D_
        alert(startPos + ", " + endPos);_x000D_
}

<input id="Javascript_example" name="one" type="text" value="Javascript example" onclick="textbox()">

Also, if you're supporting IE <= 8 you need to be aware that those browsers do not support selectionStart and selectionEnd.

I understand this question might have a React-specific cause, but it shows up first in search results for "Typeerror: Failed to fetch" and I wanted to lay out all possible causes here.

The Fetch spec lists times when you throw a TypeError from the Fetch API: https://fetch.spec.whatwg.org/#fetch-api

Relevant passages as of January 2021 are below. These are excerpts from the text.

4.6 HTTP-network fetch

To perform an HTTP-network fetch using request with an optional credentials flag, run these steps:
...
16. Run these steps in parallel:
...
2. If aborted, then:
...
3. Otherwise, if stream is readable, error stream with a TypeError.

To append a name/value name/value pair to a Headers object (headers), run these steps:

1. Normalize value.
2. If name is not a name or value is not a value, then throw a TypeError.
3. If headers’s guard is "immutable", then throw a TypeError.

Filling Headers object headers with a given object object:

To fill a Headers object headers with a given object object, run these steps:

1. If object is a sequence, then for each header in object:
   1. If header does not contain exactly two items, then throw a TypeError.

Method steps sometimes throw TypeError:

The delete(name) method steps are:

1. If name is not a name, then throw a TypeError.
2. If this’s guard is "immutable", then throw a TypeError.

The get(name) method steps are:

1. If name is not a name, then throw a TypeError.
2. Return the result of getting name from this’s header list.

The has(name) method steps are:

1. If name is not a name, then throw a TypeError.

The set(name, value) method steps are:

1. Normalize value.
2. If name is not a name or value is not a value, then throw a TypeError.
3. If this’s guard is "immutable", then throw a TypeError.

To extract a body and a Content-Type value from object, with an optional boolean keepalive (default false), run these steps:
...
5. Switch on object:
...
ReadableStream
If keepalive is true, then throw a TypeError.
If object is disturbed or locked, then throw a TypeError.

In the section "Body mixin" if you are using FormData there are several ways to throw a TypeError. I haven't listed them here because it would make this answer very long. Relevant passages: https://fetch.spec.whatwg.org/#body-mixin

In the section "Request Class" the new Request(input, init) constructor is a minefield of potential TypeErrors:

The new Request(input, init) constructor steps are:
...
6. If input is a string, then:
...
2. If parsedURL is a failure, then throw a TypeError.
3. IF parsedURL includes credentials, then throw a TypeError.
...
11. If init["window"] exists and is non-null, then throw a TypeError.
...
15. If init["referrer" exists, then:
...
1. Let referrer be init["referrer"].
2. If referrer is the empty string, then set request’s referrer to "no-referrer".
3. Otherwise:
1. Let parsedReferrer be the result of parsing referrer with baseURL.
2. If parsedReferrer is failure, then throw a TypeError.
...
18. If mode is "navigate", then throw a TypeError.
...
23. If request's cache mode is "only-if-cached" and request's mode is not "same-origin" then throw a TypeError.
...
27. If init["method"] exists, then:
...
2. If method is not a method or method is a forbidden method, then throw a TypeError.
...
32. If this’s request’s mode is "no-cors", then:
1. If this’s request’s method is not a CORS-safelisted method, then throw a TypeError.
...
35. If either init["body"] exists and is non-null or inputBody is non-null, and request’s method is GET or HEAD, then throw a TypeError.
...
38. If body is non-null and body's source is null, then:
1. If this’s request’s mode is neither "same-origin" nor "cors", then throw a TypeError.
...
39. If inputBody is body and input is disturbed or locked, then throw a TypeError.

The clone() method steps are:

1. If this is disturbed or locked, then throw a TypeError.

In the Response class:

The new Response(body, init) constructor steps are:
...
2. If init["statusText"] does not match the reason-phrase token production, then throw a TypeError.
...
8. If body is non-null, then:
1. If init["status"] is a null body status, then throw a TypeError.
...

The static redirect(url, status) method steps are:
...
2. If parsedURL is failure, then throw a TypeError.

The clone() method steps are:

1. If this is disturbed or locked, then throw a TypeError.

In section "The Fetch method"

The fetch(input, init) method steps are:
...
9. Run the following in parallel:
To process response for response, run these substeps:
...
3. If response is a network error, then reject p with a TypeError and terminate these substeps.

In addition to these potential problems, there are some browser-specific behaviors which can throw a TypeError. For instance, if you set keepalive to true and have a payload > 64 KB you'll get a TypeError on Chrome, but the same request can work in Firefox. These behaviors aren't documented in the spec, but you can find information about them by Googling for limitations for each option you're setting in fetch.

VISIBILITY:hidden TRICK

I usually go for the visibility:hidden trick

this is my styled button

<div id="uploadbutton" class="btn btn-success btn-block">Upload</div>

this is the input type=file button. Note the visibility:hidden rule

<input type="file" id="upload" style="visibility:hidden;">

this is the JavaScript bit to glue them together. It works

<script>
 $('#uploadbutton').click(function(){
    $('input[type=file]').click();
 });
 </script>

With the help of jquery it can be done as follows.

$("#color").prop('disabled', true);

"Add a reference to MySql.Data.dll" means you need to add a library reference to the downloaded connector. The IDE will link the database connection library with your application when it compiles.

Step-by-Step Example

I downloaded the binary (no installer) zip package from the MySQL web site, extracted onto the desktop, and did the following:

1. Create a new project in Visual Studio
2. In the Solution Explorer, under the project name, locate References and right-click on it. Select "Add Reference".
3. In the "Add Reference" dialog, switch to the "Browse" tab and browse to the folder containing the downloaded connector. Navigate to the "bin" folder, and select the "MySql.Data.dll" file. Click OK.
4. At the top of your code, add using MySql.Data.MySqlClient;. If you've added the reference correctly, IntelliSense should offer to complete this for you.

I found it hard to decipher what is meant by "working directory of the VM". In my example, I was using the Java Service Wrapper program to execute a jar - the dump files were created in the directory where I had placed the wrapper program, e.g. c:\myapp\bin. The reason I discovered this is because the files can be quite large and they filled up the hard drive before I discovered their location.

In your DbContext, create a default constructor for your DbContext and inherit the base like this:

    public myDbContext()
        : base("MyConnectionString")  // connectionstring name define in your web.config
    {
    }

I believe the part regarding how to span rows has been answered thoroughly (i.e. by nesting rows), but I also ran into the issue of my nested rows not filling their container. While flexbox and negative margins are an option, a much easier solution is to use the predefined h-50 class on the row containing boxes 2, 3, 4, and 5.

Note: I am using Bootstrap-4, I just wanted to share because I ran into the same problem and found this to be a more elegant solution :)

$(".reset").click(function() {
    $(this).closest('form').find("input[type=text], textarea").val("");
});

FFTW is the 'fastest fourier transform in the west', and has some Java wrappers:

http://www.fftw.org/download.html

Hope that helps!

I think the problem is that opening the file without a path will only work if your "current directory" is set correctly.

Try typing "Debug.Print CurDir" in the Immediate Window - that should show the location for your default files as set in Tools...Options.

I'm not sure I'm completely happy with it, perhaps because it's somewhat of a legacy VB command, but you could do this:

ChDir ThisWorkbook.Path

I think I'd prefer to use ThisWorkbook.Path to construct a path to the HTML file. I'm a big fan of the FileSystemObject in the Scripting Runtime (which always seems to be installed), so I'd be happier to do something like this (after setting a reference to Microsoft Scripting Runtime):

Const HTML_FILE_NAME As String = "my_input.html"

With New FileSystemObject
    With .OpenTextFile(.BuildPath(ThisWorkbook.Path, HTML_FILE_NAME), ForReading)
        ' Now we have a TextStream object that we can use to read the file
    End With
End With

In case you want to add years to specific date besides today's date using either years, or months, or days. You can do the following

var christmas2000 = new Date(2000, 12, 25); 
christmas2000.setFullYear(christmas2000.getFullYear() + 5); // using year: next 5 years
christmas2000.setFullYear(christmas2000.getMonth() + 24); // using months: next 24 months
christmas2000.setFullYear(christmas2000.getDay() + 365); // using days: next 365 months

if(c is TFrom)
{
   // Do Stuff
}

or if you plan on using c as a TForm, use the following example:

var tForm = c as TForm;
if(tForm != null)
{
   // c is of type TForm
}

The second example only needs to check to see if c is of type TForm once. Whereis if you check if see if c is of type TForm then cast it, the CLR undergoes an extra check. Here is a reference.

Edit: Stolen from Jon Skeet

If you want to make sure c is of TForm and not any class inheriting from TForm, then use

if(c.GetType() == typeof(TForm))
{
   // Do stuff cause c is of type TForm and nothing else
}

SUMIF didn't worked for me, had to use SUMIFS.

=SUMIFS(TableAmount,TableMonth,"January")

TableAmount is the table to sum the values, TableMonth the table where we search the condition and January, of course, the condition to meet.

Hope this can help someone!

Simple JavaScript, string to float:

var it_price = chief_double($("#ContentPlaceHolder1_txt_it_price").val());

function chief_double(num){
    var n = parseFloat(num);
    if (isNaN(n)) {
        return "0";
    }
    else {
        return parseFloat(num);
    }
}

I'd like to delete not only the word before cursor, but the word after or around cursor as well.

In that case the solution proposed by OP (i.e. using <c-w>) can be combined with the accepted answer to give:

inoremap <c-d> <c-o>daw<c-w>

alternatively (shorter solution):

inoremap <c-d> <c-o>vawobd

Sample input:

word1 word2 word3 word4
               ^------------- Cursor location

Output:

word1 word4

I do know that the account needs to have "Log on as a Service" privileges. Other than that, I'm not sure. A quick reference to Log on as a Service can be found here, and there is a lot of information of specific privileges here.

The standard library includes the ordered and the unordered map (std::map and std::unordered_map) containers. In an ordered map the elements are sorted by the key, insert and access is in O(log n). Usually the standard library internally uses red black trees for ordered maps. But this is just an implementation detail. In an unordered map insert and access is in O(1). It is just another name for a hashtable.

An example with (ordered) std::map:

#include <map>
#include <iostream>
#include <cassert>

int main(int argc, char **argv)
{
  std::map<std::string, int> m;
  m["hello"] = 23;
  // check if key is present
  if (m.find("world") != m.end())
    std::cout << "map contains key world!\n";
  // retrieve
  std::cout << m["hello"] << '\n';
  std::map<std::string, int>::iterator i = m.find("hello");
  assert(i != m.end());
  std::cout << "Key: " << i->first << " Value: " << i->second << '\n';
  return 0;
}

Output:

23
Key: hello Value: 23

If you need ordering in your container and are fine with the O(log n) runtime then just use std::map.

Otherwise, if you really need a hash-table (O(1) insert/access), check out std::unordered_map, which has a similar to std::map API (e.g. in the above example you just have to search and replace map with unordered_map).

The unordered_map container was introduced with the C++11 standard revision. Thus, depending on your compiler, you have to enable C++11 features (e.g. when using GCC 4.8 you have to add -std=c++11 to the CXXFLAGS).

Even before the C++11 release GCC supported unordered_map - in the namespace std::tr1. Thus, for old GCC compilers you can try to use it like this:

#include <tr1/unordered_map>

std::tr1::unordered_map<std::string, int> m;

It is also part of boost, i.e. you can use the corresponding boost-header for better portability.

Following two lines fixed my issue

view.heightAnchor.constraintEqualToConstant(50).active = true;
view.widthAnchor.constraintEqualToConstant(350).active = true;

Swift version -

var DynamicView=UIView(frame: CGRectMake(100, 200, 100, 100))
DynamicView.backgroundColor=UIColor.greenColor()
DynamicView.layer.cornerRadius=25
DynamicView.layer.borderWidth=2
self.view.addSubview(DynamicView)
DynamicView.heightAnchor.constraintEqualToConstant(50).active = true;
DynamicView.widthAnchor.constraintEqualToConstant(350).active = true;

var DynamicView2=UIView(frame: CGRectMake(100, 310, 100, 100))
DynamicView2.backgroundColor=UIColor.greenColor()
DynamicView2.layer.cornerRadius=25
DynamicView2.layer.borderWidth=2
self.view.addSubview(DynamicView2)
DynamicView2.heightAnchor.constraintEqualToConstant(50).active = true;
DynamicView2.widthAnchor.constraintEqualToConstant(350).active = true;

var DynamicView3:UIView=UIView(frame: CGRectMake(10, 420, 355, 100))
DynamicView3.backgroundColor=UIColor.greenColor()
DynamicView3.layer.cornerRadius=25
DynamicView3.layer.borderWidth=2
self.view.addSubview(DynamicView3)

let yourLabel:UILabel = UILabel(frame: CGRectMake(110, 10, 200, 20))
yourLabel.textColor = UIColor.whiteColor()
//yourLabel.backgroundColor = UIColor.blackColor()
yourLabel.text = "mylabel text"
DynamicView3.addSubview(yourLabel)
DynamicView3.heightAnchor.constraintEqualToConstant(50).active = true;
DynamicView3.widthAnchor.constraintEqualToConstant(350).active = true;

let stackView   = UIStackView()
stackView.axis  = UILayoutConstraintAxis.Vertical
stackView.distribution  = UIStackViewDistribution.EqualSpacing
stackView.alignment = UIStackViewAlignment.Center
stackView.spacing   = 30

stackView.addArrangedSubview(DynamicView)
stackView.addArrangedSubview(DynamicView2)
stackView.addArrangedSubview(DynamicView3)

stackView.translatesAutoresizingMaskIntoConstraints = false;

self.view.addSubview(stackView)

//Constraints
stackView.centerXAnchor.constraintEqualToAnchor(self.view.centerXAnchor).active = true
stackView.centerYAnchor.constraintEqualToAnchor(self.view.centerYAnchor).active = true

Its little tricky in android studio there is no default folder for all screen size you need to create but with little trick.

• when you paste your image into drawable folder a popup will appear to ask about directory
• Add subfolder name after drawable like drawable-xxhdpi
• I will suggest you to paste image with highest resolution it will auto detect for other size.. thats it next time when you will paste it will ask to you about directory

i cant post image here so if still having any problem. here is tutorial..

Drawable folder in android studio

I had the same error. In my case, using Appium, I had two versions of ADB

$ /usr/local/bin/adb version 36

and

$ /Users/user/Library/Android/sdk/platform-tools/adb version 39

The solution was:

1. be sure that your $PATH in bash_profile is pointing to: /Users/user/Library/Android/sdk/platform-tools/

2. stop the adb server: adb kill-server and check Appium is stopped.

3. delete the adb version 36 (or you can rename it to have a backup): rm /usr/local/bin/adb

4. start adb server: adb start-server or just starting Appium

cmd.Parameters.Add(String parameterName, Object value) is deprecated now. Instead use cmd.Parameters.AddWithValue(String parameterName, Object value)

Add(String parameterName, Object value) has been deprecated. Use AddWithValue(String parameterName, Object value)

There is no difference in terms of functionality. The reason they deprecated the cmd.Parameters.Add(String parameterName, Object value) in favor of AddWithValue(String parameterName, Object value) is to give more clarity. Here is the MSDN reference for the same

private void button1_Click(object sender, EventArgs e) {
  using (SqlConnection con = new SqlConnection(dc.Con)) {
    using (SqlCommand cmd = new SqlCommand("sp_Add_contact", con)) {
      cmd.CommandType = CommandType.StoredProcedure;

      cmd.Parameters.AddWithValue("@FirstName", SqlDbType.VarChar).Value = txtFirstName.Text;
      cmd.Parameters.AddWithValue("@LastName", SqlDbType.VarChar).Value = txtLastName.Text;

      con.Open();
      cmd.ExecuteNonQuery();
    }
  }
}

Add:

using System.Linq;

to the top of your file.

And then:

Car[] carList = ...
var carMake = 
    from item in carList
    where item.Model == "bmw" 
    select item.Make;

or if you prefer the fluent syntax:

var carMake = carList
    .Where(item => item.Model == "bmw")
    .Select(item => item.Make);

Things to pay attention to:

• The usage of item.Make in the select clause instead if s.Make as in your code.
• You have a whitespace between item and .Model in your where clause

In my case, I had a repo with:

• requirements A,B,C,D in .json
• but only A,B,C in the .lock

In the meantime, A,B,C had newer versions with respect when the lock was generated.

For some reason, I deleted the "vendors" and wanted to do a composer install and failed with the message:

Warning: The lock file is not up to date with the latest changes in composer.json.
You may be getting outdated dependencies. Run update to update them.
Your requirements could not be resolved to an installable set of packages.

I tried to run the solution from Seldaek issuing a composer update vendorD/libraryD but composer insisted to update more things, so .lock had too changes seen my my git tool.

The solution I used was:

1. Delete all the vendors dir.
2. Temporarily remove the requirement VendorD/LibraryD from the .json.
3. run composer install.
4. Then delete the file .json and checkout it again from the repo (equivalent to re-adding the file, but avoiding potential whitespace changes).
5. Then run Seldaek's solution composer update vendorD/libraryD

It did install the library, but in addition, git diff showed me that in the .lock only the new things were added without editing the other ones.

(Thnx Seldaek for the pointer ;) )

Nothing compares to extjs in terms of community size and presence on StackOverflow. Despite previous controversy, Ext JS now has a GPLv3 open source license. Its learning curve is long, but it can be quite rewarding once learned. Ext JS lacks a Material Design theme, and the team has repeatedly refused to release the source code on GitHub. For mobile, one must use the separate Sencha Touch library.

Have in mind also that,

large JavaScript libraries, such as YUI, have been receiving less attention from the community. Many developers today look at large JavaScript libraries as walled gardens they don’t want to be locked into.

-- Announcement of YUI development being ceased

That said, below are a number of Ext JS alternatives currently available.

Leading client widget libraries

1. Blueprint is a React-based UI toolkit developed by big data analytics company Palantir in TypeScript, and "optimized for building complex data-dense interfaces for desktop applications". Actively developed on GitHub as of May 2019, with comprehensive documentation. Components range from simple (chips, toast, icons) to complex (tree, data table, tag input with autocomplete, date range picker. No accordion or resizer.

   Blueprint targets modern browsers (Chrome, Firefox, Safari, IE 11, and Microsoft Edge) and is licensed under a modified Apache license.

   Sandbox / demo • GitHub • Docs

2. Webix - an advanced, easy to learn, mobile-friendly, responsive and rich free&open source JavaScript UI components library. Webix spun off from DHTMLX Touch (a project with 8 years of development behind it - see below) and went on to become a standalone UI components framework. The GPL3 edition allows commercial use and lets non-GPL applications using Webix keep their license, e.g. MIT, via a license exemption for FLOSS. Webix has 55 UI widgets, including trees, grids, treegrids and charts. Funding comes from a commercial edition with some advanced widgets (Pivot, Scheduler, Kanban, org chart etc.). Webix has an extensive list of free and commercial widgets, and integrates with most popular frameworks (React, Vue, Meteor, etc) and UI components.

   

   Skins look modern, and include a Material Design theme. The Touch theme also looks quite Material Design-ish. See also the Skin Builder.

   Minimal GitHub presence, but includes the library code, and the documentation (which still needs major improvements). Webix suffers from a having a small team and a lack of marketing. However, they have been responsive to user feedback, both on GitHub and on their forum.

   The library was lean (128Kb gzip+minified for all 55 widgets as of ~2015), faster than ExtJS, dojo and others, and the design is pleasant-looking. The current version of Webix (v6, as of Nov 2018) got heavier (400 - 676kB minified but NOT gzipped).

   The demos on Webix.com look and function great. The developer, XB Software, uses Webix in solutions they build for paying customers, so there's likely a good, funded future ahead of it.

   Webix aims for backwards compatibility down to IE8, and as a result carries some technical debt.

   Wikipedia • GitHub • Playground/sandbox • Admin dashboard demo • Demos • Widget samples

3. react-md - MIT-licensed Material Design UI components library for React. Responsive, accessible. Implements components from simple (buttons, cards) to complex (sortable tables, autocomplete, tags input, calendars). One lead author, ~1900 GitHub stars.

4. kendo - jQuery-based UI toolkit with 40+ basic open-source widgets, plus commercial professional widgets (grids, trees, charts etc.). Responsive&mobile support. Works with Bootstrap and AngularJS. Modern, with Material Design themes. The documentation is available on GitHub, which has enabled numerous contributions from users (4500+ commits, 500+ PRs as of Jan 2015).

   

   Well-supported commercially, claiming millions of developers, and part of a large family of developer tools. Telerik has received many accolades, is a multi-national company (Bulgaria, US), was acquired by Progress Software, and is a thought leader.

   A Kendo UI Professional developer license costs $700 and posting access to most forums is conditioned upon having a license or being in the trial period.

   [Wikipedia] • GitHub/Telerik • Demos • Playground • Tools

5. OpenUI5 - jQuery-based UI framework with 180 widgets, Apache 2.0-licensed and fully-open sourced and funded by German software giant SAP SE.

   

   The community is much larger than that of Webix, SAP is hiring developers to grow OpenUI5, and they presented OpenUI5 at OSCON 2014.

   The desktop themes are rather lackluster, but the Fiori design for web and mobile looks clean and neat.

   Wikipedia • GitHub • Mobile-first controls demos • Desktop controls demos • SO

6. DHTMLX - JavaScript library for building rich Web and Mobile apps. Looks most like ExtJS - check the demos. Has been developed since 2005 but still looks modern. All components except TreeGrid are available under GPLv2 but advanced features for many components are only available in the commercial PRO edition - see for example the tree. Claims to be used by many Fortune 500 companies.

   

   Minimal presence on GitHub (the main library code is missing) and StackOverflow but active forum. The documentation is not available on GitHub, which makes it difficult to improve by the community.

7. Polymer, a Web Components polyfill, plus Polymer Paper, Google's implementation of the Material design. Aimed at web and mobile apps. Doesn't have advanced widgets like trees or even grids but the controls it provides are mobile-first and responsive. Used by many big players, e.g. IBM or USA Today.

   

8. Ant Design claims it is "a design language for background applications", influenced by "nature" and helping designers "create low-entropy atmosphere for developer team". That's probably a poor translation from Chinese for "UI components for enterprise web applications". It's a React UI library written in TypeScript, with many components, from simple (buttons, cards) to advanced (autocomplete, calendar, tag input, table).

   The project was born in China, is popular with Chinese companies, and parts of the documentation are available only in Chinese. Quite popular on GitHub, yet it makes the mistake of splitting the community into Chinese and English chat rooms. The design looks Material-ish, but fonts are small and the information looks lost in a see of whitespace.

9. PrimeUI - collection of 45+ rich widgets based on jQuery UI. Apache 2.0 license. Small GitHub community. 35 premium themes available.

10. qooxdoo - "a universal JavaScript framework with a coherent set of individual components", developed and funded by German hosting provider 1&1 (see the contributors, one of the world's largest hosting companies. GPL/EPL (a business-friendly license).

    Mobile themes look modern but desktop themes look old (gradients).

    

    Wikipedia • GitHub • Web/Mobile/Desktop demos • Widgets Demo browser • Widget browser • SO • Playground • Community

11. jQuery UI - easy to pick up; looks a bit dated; lacks advanced widgets. Of course, you can combine it with independent widgets for particular needs, e.g. trees or other UI components, but the same can be said for any other framework.

12. angular + Angular UI. While Angular is backed by Google, it's being radically revamped in the upcoming 2.0 version, and "users will need to get to grips with a new kind of architecture. It's also been confirmed that there will be no migration path from Angular 1.X to 2.0". Moreover, the consensus seems to be that Angular 2 won't really be ready for use until a year or two from now. Angular UI has relatively few widgets (no trees, for example).

13. DojoToolkit and their powerful Dijit set of widgets. Completely open-sourced and actively developed on GitHub, but development is now (Nov 2018) focused on the new dojo.io framework, which has very few basic widgets. BSD/AFL license. Development started in 2004 and the Dojo Foundation is being sponsored by IBM, Google, and others - see Wikipedia. 7500 questions here on SO.

    

    Themes look desktop-oriented and dated - see the theme tester in dijit. The official theme previewer is broken and only shows "Claro". A Bootstrap theme exists, which looks a lot like Bootstrap, but doesn't use Bootstrap classes. In Jan 2015, I started a thread on building a Material Design theme for Dojo, which got quite popular within the first hours. However, there are questions regarding building that theme for the current Dojo 1.10 vs. the next Dojo 2.0. The response to that thread shows an active and wide community, covering many time zones.

    Unfortunately, Dojo has fallen out of popularity and fewer companies appear to use it, despite having (had?) a strong foothold in the enterprise world. In 2009-2012, its learning curve was steep and the documentation needed improvements; while the documentation has substantially improved, it's unclear how easy it is to pick up Dojo nowadays.

    With a Material Design theme, Dojo (2.0?) might be the killer UI components framework.

    Wikipedia • GitHub • Themes • Demos • Desktop widgets • SO

14. Enyo - front-end library aimed at mobile and TV apps (e.g. large touch-friendly controls). Developed by LG Electronix and Apache-licensed on GitHub.

15. The radical Cappuccino - Objective-J (a superset of JavaScript) instead of HTML+CSS+DOM

16. Mochaui, MooTools UI Library User Interface Library. <300 GitHub stars.

17. CrossUI - cross-browser JS framework to develop and package the exactly same code and UI into Web Apps, Native Desktop Apps (Windows, OS X, Linux) and Mobile Apps (iOS, Android, Windows Phone, BlackBerry). Open sourced LGPL3. Featured RAD tool (form builder etc.). The UI looks desktop-, not web-oriented. Actively developed, small community. No presence on GitHub.

18. ZinoUI - simple widgets. The DataTable, for instance, doesn't even support sorting.

19. Wijmo - good-looking commercial widgets, with old (jQuery UI) widgets open-sourced on GitHub (their development stopped in 2013). Developed by ComponentOne, a division of GrapeCity. See Wijmo Complete vs. Open.

20. CxJS - commercial JS framework based on React, Babel and webpack offering form elements, form validation, advanced grid control, navigational elements, tooltips, overlays, charts, routing, layout support, themes, culture dependent formatting and more.

Widgets - Demo Apps - Examples - GitHub

Full-stack frameworks

1. SproutCore - developed by Apple for web applications with native performance, handling large data sets on the client. Powers iCloud.com. Not intended for widgets.

2. Wakanda: aimed at business/enterprise web apps - see What is Wakanda?. Architecture:

   • Wakanda Server (server-side JavaScript (custom engine) + open-source NoSQL database)
   • desktop IDE and WYSIWYG editor for tables, forms, reports

   • Wakanda Application Framework (datasource layer + browser-based interface widgets) that helps with browser and device compatibility across desktop and mobile

     Wakanda is highly integrated, includes a ton of features out of the box, but has a very small GitHub community and SO presence.

3. Servoy - "a cross platform frontend development and deployment environment for SQL databases". Boasts a "full WYSIWIG (What You See Is What You Get) UI designer for HTML5 with built-in data-binding to back-end services", responsive design, support for HTML6 Web Components, Websockets and mobile platforms. Written in Java and generates JavaScript code using various JavaBeans.

4. SmartClient/SmartGWT - mobile and cross-browser HTML5 UI components combined with a Java server. Aimed at building powerful business apps - see demos.

5. Vaadin - full-stack Java/GWT + JavaScript/HTML3 web app framework

6. Backbase - portal software

7. Shiny - front-end library on top R, with visualization, layout and control widgets

8. ZKOSS: Java+jQuery+Bootstrap framework for building enterprise web and mobile apps.

CSS libraries + minimal widgets

These libraries don't implement complex widgets such as tables with sorting/filtering, autocompletes, or trees.

1. Bootstrap

2. Foundation for Apps - responsive front-end framework on top of AngularJS; more of a grid/layout/navigation library

3. UI Kit - similar to Bootstrap, with fewer widgets, but with official off-canvas.

Libraries using HTML Canvas

Using the canvas elements allows for complete control over the UI, and great cross-browser compatibility, but comes at the cost of missing native browser functionality, e.g. page search via Ctrl/Cmd+F.

1. Zebra - demos

No longer developed as of Dec 2014

1. Yahoo! User Interface - YUI, launched in 2005, but no longer maintained by the core contributors - see the announcement, which highlights reasons why large UI widget libraries are perceived as walled gardens that developers don't want to be locked into.
2. echo3, GitHub. Supports writing either server-side Java applications that don't require developer knowledge of HTML, HTTP, or JavaScript, or client-side JavaScript-based applications do not require a server, but can communicate with one via AJAX. Last update: July 2013.
3. ampleSDK
4. Simpler widgets livepipe.net
5. JxLib
6. rialto
7. Simple UI kit
8. Prototype-ui

Other lists

• Best of JS - component toolkits
• Wikipedia's Comparison of JavaScript frameworks
• Wikipedia's list of GUI-related JavaScript libraries
• jqueryuiwidgets.com - detailed jQuery widgets feature comparison

>>> import sys
>>> import traceback
>>> try:
...   5 / 0
... except ZeroDivisionError as e:
...   type_, value_, traceback_ = sys.exc_info()
>>> traceback.format_tb(traceback_)
['  File "<stdin>", line 2, in <module>\n']
>>> value_
ZeroDivisionError('integer division or modulo by zero',)
>>> type_
<type 'exceptions.ZeroDivisionError'>
>>>
>>> 5 / 0
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ZeroDivisionError: integer division or modulo by zero

You use sys.exc_info() to collect the information and the functions in the traceback module to format it. Here are some examples for formatting it.

The whole exception string is at:

>>> ex = traceback.format_exception(type_, value_, traceback_)
>>> ex
['Traceback (most recent call last):\n', '  File "<stdin>", line 2, in <module>\n', 'ZeroDivisionError: integer division or modulo by zero\n']

This code should do it:

manifest.json

   {
      "name": "Alert 'hello world!' on page opening",
      "version": "1.0",
      "manifest_version": 2,
      "content_scripts": [
        {
          "matches": [
            "<all_urls>"
          ],
          "js": ["content.js"]
        }
      ]
    }

content.js

alert('Hello world!')

Try the following:

var filteredFileSet = fileList.Where(item => filterList.Contains(item));

When you iterate over filteredFileSet (See LINQ Execution) it will consist of a set of IEnumberable values. This is based on the Where Operator checking to ensure that items within the fileList data set are contained within the filterList set.

As fileList is an IEnumerable set of string values, you can pass the 'item' value directly into the Contains method.

actually I didnt understand what do you want to do. As I understand, you can write this code another way like this. Are you asking this or not? Can you explain more?

string s = string.Empty;
    if(!string.IsNullOrEmpty(myObj))
    {
    s = myObj.ToString();
    }

using select-object for example:

Get-ADUser -Filter * -SearchBase 'OU=Users & Computers, DC=aaaaaaa, DC=com' -Properties DisplayName | select -expand displayname | Export-CSV "ADUsers.csv" 

The answer may be language dependent, but since you don't mention one, here is what I just came up with in js:

 var a = ['1','','2','','3'].join('\n');

 console.log(a.match(/^.{0}$/gm)); // ["", ""]

 // the "." is for readability. it doesn't really matter
 a.match(/^[you can put whatever the hell you want and this will also work just the same]{0}$/gm)

You could also do a.match(/^(.{10,}|.{0})$/gm) to match empty lines OR lines that meet a criteria. (This is what I was looking for to end up here.)

I know that ^ will match the beginning of any line and $ will match the end of any line

This is only true if you have the multiline flag turned on, otherwise it will only match the beginning/end of the string. I'm assuming you know this and are implying that, but wanted to note it here for learners.

Here is one more option without too much JS hassle: https://github.com/kmahelona/ipython_notebook_goodies

Couple of ways. Firstly, if you're adding a row each time a [de]activation occurs, you can set the column default to GETDATE() and not set the value in the insert. Otherwise,

UPDATE TableName SET [ColumnName] = GETDATE() WHERE UserId = @userId

In [117]: datetime.datetime.strptime?
Type:           builtin_function_or_method
Base Class:     <type 'builtin_function_or_method'>
String Form:    <built-in method strptime of type object at 0x9a2520>
Namespace:      Interactive
Docstring:
    string, format -> new datetime parsed from a string (like time.strptime()).

As simon marc said, the process is much the same as it is for you or I browsing a website. If you are comfortable with using the Zend framework, there are some easy to follow tutorials to that make life quite easy to set things up. The hardest part of building a restful api is the design of the it, and making it truly restful, think CRUD in database terms.

It could be that you really want an xmlrpc interface or something else similar. What do you want this interface to allow you to do?

--EDIT

Here is where I got started with restful api and Zend Framework. Zend Framework Example

In short don't use Zend rest server, it's obsolete.

UPDATE:

After misunderstanding, I finally got what you are trying to do. You should check your server configuration files; are you using apache2 or some other server software?

Look for lines that start with LoadModule php... There probably are configuration files/directories named mods or something like that, start from there.

You could also check output from php -r 'phpinfo();' | grep php and compare lines to phpinfo(); from web server.

To run php interactively:

(so you can paste/write code in the console)

php -a

To make it parse file and output to console:

php -f file.php

Parse file and output to another file:

php -f file.php > results.html

Do you need something else?

To run only small part, one line or like, you can use:

php -r '$x = "Hello World"; echo "$x\n";'

If you are running linux then do man php at console.

if you need/want to run php through fpm, use cli fcgi

SCRIPT_NAME="file.php" SCRIP_FILENAME="file.php" REQUEST_METHOD="GET" cgi-fcgi -bind -connect "/var/run/php-fpm/php-fpm.sock"

where /var/run/php-fpm/php-fpm.sock is your php-fpm socket file.

• Debug: fine-grained statements concerning program state, typically used for debugging;

• Info: informational statements concerning program state, representing program events or behavior tracking;

• Warn: statements that describe potentially harmful events or states in the program;

• Error: statements that describe non-fatal errors in the application; this level is used quite often for logging handled exceptions;

• Fatal: statements representing the most severe of error conditions, assumedly resulting in program termination.

Found on http://www.beefycode.com/post/Log4Net-Tutorial-pt-1-Getting-Started.aspx

This isn't a very beautiful answer, but it's what I use to create zero-length vectors:

0[-1]     # numeric
""[-1]    # character
TRUE[-1]  # logical
0L[-1]    # integer

A literal is a vector of length 1, and [-1] removes the first element (the only element in this case) from the vector, leaving a vector with zero elements.

As a bonus, if you want a single NA of the respective type:

0[NA]     # numeric
""[NA]    # character
TRUE[NA]  # logical
0L[NA]    # integer

Use LinkedList instead. Than, you can create an array if necessary.

Use the Oracle documentation and search for keyword "trigger" in your browser.

This approach should work with other metadata type questions.

Consider using the E.164 format. For full international support, you'd need a VARCHAR of 15 digits.

See Twilio's recommendation for more information on localization of phone numbers.

Here is a helper function:

def append_df_to_excel(filename, df, sheet_name='Sheet1', startrow=None,
                       truncate_sheet=False, 
                       **to_excel_kwargs):
    """
    Append a DataFrame [df] to existing Excel file [filename]
    into [sheet_name] Sheet.
    If [filename] doesn't exist, then this function will create it.

    Parameters:
      filename : File path or existing ExcelWriter
                 (Example: '/path/to/file.xlsx')
      df : dataframe to save to workbook
      sheet_name : Name of sheet which will contain DataFrame.
                   (default: 'Sheet1')
      startrow : upper left cell row to dump data frame.
                 Per default (startrow=None) calculate the last row
                 in the existing DF and write to the next row...
      truncate_sheet : truncate (remove and recreate) [sheet_name]
                       before writing DataFrame to Excel file
      to_excel_kwargs : arguments which will be passed to `DataFrame.to_excel()`
                        [can be dictionary]

    Returns: None

    (c) [MaxU](https://stackoverflow.com/users/5741205/maxu?tab=profile)
    """
    from openpyxl import load_workbook

    # ignore [engine] parameter if it was passed
    if 'engine' in to_excel_kwargs:
        to_excel_kwargs.pop('engine')

    writer = pd.ExcelWriter(filename, engine='openpyxl')

    # Python 2.x: define [FileNotFoundError] exception if it doesn't exist 
    try:
        FileNotFoundError
    except NameError:
        FileNotFoundError = IOError


    try:
        # try to open an existing workbook
        writer.book = load_workbook(filename)
        
        # get the last row in the existing Excel sheet
        # if it was not specified explicitly
        if startrow is None and sheet_name in writer.book.sheetnames:
            startrow = writer.book[sheet_name].max_row

        # truncate sheet
        if truncate_sheet and sheet_name in writer.book.sheetnames:
            # index of [sheet_name] sheet
            idx = writer.book.sheetnames.index(sheet_name)
            # remove [sheet_name]
            writer.book.remove(writer.book.worksheets[idx])
            # create an empty sheet [sheet_name] using old index
            writer.book.create_sheet(sheet_name, idx)
        
        # copy existing sheets
        writer.sheets = {ws.title:ws for ws in writer.book.worksheets}
    except FileNotFoundError:
        # file does not exist yet, we will create it
        pass

    if startrow is None:
        startrow = 0

    # write out the new sheet
    df.to_excel(writer, sheet_name, startrow=startrow, **to_excel_kwargs)

    # save the workbook
    writer.save()
            

NOTE: for Pandas < 0.21.0, replace sheet_name with sheetname!

Usage examples:

append_df_to_excel('d:/temp/test.xlsx', df)

append_df_to_excel('d:/temp/test.xlsx', df, header=None, index=False)

append_df_to_excel('d:/temp/test.xlsx', df, sheet_name='Sheet2', index=False)

append_df_to_excel('d:/temp/test.xlsx', df, sheet_name='Sheet2', index=False, startrow=25)

Visual Web Developer Express

The BCP Utility can also be used in the form of a .bat file, but be cautious of escape sequences (ie quotes "" must be used in conjunction with ) and the appropriate tags.

.bat Example:

C:
bcp "\"YOUR_SERVER\".dbo.Proc" queryout C:\FilePath.txt -T -c -q
-- Add PAUSE here if you'd like to see the completed batch

-q MUST be used in the presence of quotations within the query itself.

BCP can also run Stored Procedures if necessary. Again, be cautious: Temporary Tables must be created prior to execution or else you should consider using Table Variables.

Basically its this: You have three files: Your long running PHP script, a progress bar controlled by Javascript (@SapphireSun gives an option), and a progress script. The hard part is the Progress Script; your long script must be able to report its progress without direct communication to your progress script. This can be in the form of session id's mapped to progress meters, a database, or check of whats not finished.

The process is simple:

1. Execute your script and zero out progress bar
2. Using AJAX, query your progress script
3. Progress script must somehow check on progress
4. Change the progress bar to reflect the value
5. Clean up when finished

Today I had a scenario, where I was performing following:

myViewGroup.setVisibility(View.GONE);

Right on the next frame I was performing an if check somewhere else for visibility state of that view. Guess what? The following condition was passing:

if(myViewGroup.getVisibility() == View.VISIBLE) {
    // this `if` was fulfilled magically
}

Placing breakpoints you can see, that visibility changes to GONE, but right on the next frame it magically becomes VISIBLE. I was trying to understand how the hell this could happen.

Turns out there was an animation applied to this view, which internally caused the view to change it's visibility to VISIBLE until finishing the animation:

public void someFunction() {
    ...
    TransitionManager.beginDelayedTransition(myViewGroup);
    ...

    myViewGroup.setVisibility(View.GONE);
}

If you debug, you'll see that myViewGroup indeed changes its visibility to GONE, but right on the next frame it would again become visible in order to run the animation.

So, if you come across with such a situation, make sure you are not performing an if check in amidst of animating the view.

You can remove all animations on the view via View.clearAnimation().

for me, shift + enter did the trick.

Here is another way to reproduce this error in Python2.7 with numpy:

import numpy as np
a = np.array([1,2,3])
b = np.array([4,5,6])
c = np.concatenate(a,b)   #note the lack of tuple format for a and b
print(c) 

The np.concatenate method produces an error:

TypeError: only length-1 arrays can be converted to Python scalars

If you read the documentation around numpy.concatenate, then you see it expects a tuple of numpy array objects. So surrounding the variables with parens fixed it:

import numpy as np
a = np.array([1,2,3])
b = np.array([4,5,6])
c = np.concatenate((a,b))  #surround a and b with parens, packaging them as a tuple
print(c) 

Then it prints:

[1 2 3 4 5 6]

What's going on here?

That error is a case of bubble-up implementation - it is caused by duck-typing philosophy of python. This is a cryptic low-level error python guts puke up when it receives some unexpected variable types, tries to run off and do something, gets part way through, the pukes, attempts remedial action, fails, then tells you that "you can't reformulate the subspace responders when the wind blows from the east on Tuesday".

In more sensible languages like C++ or Java, it would have told you: "you can't use a TypeA where TypeB was expected". But Python does it's best to soldier on, does something undefined, fails, and then hands you back an unhelpful error. The fact we have to be discussing this is one of the reasons I don't like Python, or its duck-typing philosophy.

Using old C++ version, you can use this snippet :

template<typename T>
string toBinary(const T& t)
{
  string s = "";
  int n = sizeof(T)*8;
  for(int i=n-1; i>=0; i--)
  {
    s += (t & (1 << i))?"1":"0";
  }
  return s;
}

int main()
{
  char a, b;

  short c;
  a = -58;
  c = -315;

  b = a >> 3;

  cout << "a = " << a << " => " << toBinary(a) << endl;
  cout << "b = " << b << " => " << toBinary(b) << endl;
  cout << "c = " << c << " => " << toBinary(c) << endl;
}

a = => 11000110
b = => 11111000
c = -315 => 1111111011000101

Found the answer here: http://www.digitallycreated.net/Blog/59/locally-publishing-a-vs2010-asp.net-web-application-using-msbuild

Visual Studio 2010 has great new Web Application Project publishing features that allow you to easy publish your web app project with a click of a button. Behind the scenes the Web.config transformation and package building is done by a massive MSBuild script that’s imported into your project file (found at: C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v10.0\Web\Microsoft.Web.Publishing.targets). Unfortunately, the script is hugely complicated, messy and undocumented (other then some oft-badly spelled and mostly useless comments in the file). A big flowchart of that file and some documentation about how to hook into it would be nice, but seems to be sadly lacking (or at least I can’t find it).

Unfortunately, this means performing publishing via the command line is much more opaque than it needs to be. I was surprised by the lack of documentation in this area, because these days many shops use a continuous integration server and some even do automated deployment (which the VS2010 publishing features could help a lot with), so I would have thought that enabling this (easily!) would be have been a fairly main requirement for the feature.

Anyway, after digging through the Microsoft.Web.Publishing.targets file for hours and banging my head against the trial and error wall, I’ve managed to figure out how Visual Studio seems to perform its magic one click “Publish to File System” and “Build Deployment Package” features. I’ll be getting into a bit of MSBuild scripting, so if you’re not familiar with MSBuild I suggest you check out this crash course MSDN page.

Publish to File System

The VS2010 Publish To File System Dialog Publish to File System took me a while to nut out because I expected some sensible use of MSBuild to be occurring. Instead, VS2010 does something quite weird: it calls on MSBuild to perform a sort of half-deploy that prepares the web app’s files in your project’s obj folder, then it seems to do a manual copy of those files (ie. outside of MSBuild) into your target publish folder. This is really whack behaviour because MSBuild is designed to copy files around (and other build-related things), so it’d make sense if the whole process was just one MSBuild target that VS2010 called on, not a target then a manual copy.

This means that doing this via MSBuild on the command-line isn’t as simple as invoking your project file with a particular target and setting some properties. You’ll need to do what VS2010 ought to have done: create a target yourself that performs the half-deploy then copies the results to the target folder. To edit your project file, right click on the project in VS2010 and click Unload Project, then right click again and click Edit. Scroll down until you find the Import element that imports the web application targets (Microsoft.WebApplication.targets; this file itself imports the Microsoft.Web.Publishing.targets file mentioned earlier). Underneath this line we’ll add our new target, called PublishToFileSystem:

<Target Name="PublishToFileSystem"
        DependsOnTargets="PipelinePreDeployCopyAllFilesToOneFolder">
    <Error Condition="'$(PublishDestination)'==''"
           Text="The PublishDestination property must be set to the intended publishing destination." />
    <MakeDir Condition="!Exists($(PublishDestination))"
             Directories="$(PublishDestination)" />

    <ItemGroup>
        <PublishFiles Include="$(_PackageTempDir)\**\*.*" />
    </ItemGroup>

    <Copy SourceFiles="@(PublishFiles)"
          DestinationFiles="@(PublishFiles->'$(PublishDestination)\%(RecursiveDir)%(Filename)%(Extension)')"
          SkipUnchangedFiles="True" />
</Target>

This target depends on the PipelinePreDeployCopyAllFilesToOneFolder target, which is what VS2010 calls before it does its manual copy. Some digging around in Microsoft.Web.Publishing.targets shows that calling this target causes the project files to be placed into the directory specified by the property _PackageTempDir.

The first task we call in our target is the Error task, upon which we’ve placed a condition that ensures that the task only happens if the PublishDestination property hasn’t been set. This will catch you and error out the build in case you’ve forgotten to specify the PublishDestination property. We then call the MakeDir task to create that PublishDestination directory if it doesn’t already exist.

We then define an Item called PublishFiles that represents all the files found under the _PackageTempDir folder. The Copy task is then called which copies all those files to the Publish Destination folder. The DestinationFiles attribute on the Copy element is a bit complex; it performs a transform of the items and converts their paths to new paths rooted at the PublishDestination folder (check out Well-Known Item Metadata to see what those %()s mean).

To call this target from the command-line we can now simply perform this command (obviously changing the project file name and properties to suit you):

msbuild Website.csproj "/p:Platform=AnyCPU;Configuration=Release;PublishDestination=F:\Temp\Publish" /t:PublishToFileSystem

I'm using gson 2.2.3

public class Main {

/**
 * @param args
 * @throws IOException 
 */
public static void main(String[] args) throws IOException {

    JsonReader jsonReader = new JsonReader(new FileReader("jsonFile.json"));

    jsonReader.beginObject();

    while (jsonReader.hasNext()) {

    String name = jsonReader.nextName();
        if (name.equals("descriptor")) {
             readApp(jsonReader);

        }
    }

   jsonReader.endObject();
   jsonReader.close();

}

public static void readApp(JsonReader jsonReader) throws IOException{
    jsonReader.beginObject();
     while (jsonReader.hasNext()) {
         String name = jsonReader.nextName();
         System.out.println(name);
         if (name.contains("app")){
             jsonReader.beginObject();
             while (jsonReader.hasNext()) {
                 String n = jsonReader.nextName();
                 if (n.equals("name")){
                     System.out.println(jsonReader.nextString());
                 }
                 if (n.equals("age")){
                     System.out.println(jsonReader.nextInt());
                 }
                 if (n.equals("messages")){
                     jsonReader.beginArray();
                     while  (jsonReader.hasNext()) {
                          System.out.println(jsonReader.nextString());
                     }
                     jsonReader.endArray();
                 }
             }
             jsonReader.endObject();
         }

     }
     jsonReader.endObject();
}
}

If you can't access the file and your os is any linux distro or mac os x then either of these commands should work:

sudo nano .bashrc

chmod 777 .bashrc 

it is worthless

Thank you for all answers! I found it! It calls "Column selection (for Sublime)" and "Column Mode Editing (for Notepad++)" https://www.sublimetext.com/docs/3/column_selection.html

If you actually want a C-style array

import array
a = array.array('i', x * [0])
a[3] = 5
try:
   [5] = 'a'
except TypeError:
   print('integers only allowed')

Note that there's no concept of un-initialized variable in python. A variable is a name that is bound to a value, so that value must have something. In the example above the array is initialized with zeros.

However, this is uncommon in python, unless you actually need it for low-level stuff. In most cases, you are better-off using an empty list or empty numpy array, as other answers suggest.

Very simple to solve!!

I don't like an idea of having logic inside adapter as a different view type because every time it checks for the view type before returning the view. Below solution avoids extra checks.

Just add LinearLayout (vertical) header view + recyclerview + footer view inside android.support.v4.widget.NestedScrollView.

Check this out:

 <android.support.v4.widget.NestedScrollView
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

       <View
            android:id="@+id/header"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>

        <android.support.v7.widget.RecyclerView
            android:id="@+id/list"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layoutManager="LinearLayoutManager"/>

        <View
            android:id="@+id/footer"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>
    </LinearLayout>
</android.support.v4.widget.NestedScrollView>

Add this line of code for smooth scrolling

RecyclerView v = (RecyclerView) findViewById(...);
v.setNestedScrollingEnabled(false);

This will lose all RV performance and RV will try to lay out all view holders regardless of the layout_height of RV

Recommended using for the small size list like Nav drawer or settings etc.

Same problem with Anaconda running on Ubuntu 15.10. I closed the terminal and opened a new window and it worked fine.

Nope, no destructors here. The reason is that all Java objects are heap allocated and garbage collected. Without explicit deallocation (i.e. C++'s delete operator) there is no sensible way to implement real destructors.

Java does support finalizers, but they are meant to be used only as a safeguard for objects holding a handle to native resources like sockets, file handles, window handles, etc. When the garbage collector collects an object without a finalizer it simply marks the memory region as free and that's it. When the object has a finalizer, it's first copied into a temporary location (remember, we're garbage collecting here), then it's enqueued into a waiting-to-be-finalized queue and then a Finalizer thread polls the queue with very low priority and runs the finalizer.

When the application exits, the JVM stops without waiting for the pending objects to be finalized, so there practically no guarantees that your finalizers will ever run.