having to pass context around everywhere is really annoying me. the code becomes too verbose and unmanageable. I do this in every project instead...

public class global {
    public static Activity globalContext = null;

and set it in the main activity create

@Override
public void onCreate(Bundle savedInstanceState) {
    Thread.setDefaultUncaughtExceptionHandler(new CustomExceptionHandler(
            global.sdcardPath,
            ""));
    super.onCreate(savedInstanceState);

    //Start 
    //Debug.startMethodTracing("appname.Trace1");

    global.globalContext = this;

also all preference keys should be language independent, I'm shocked nobody has mentioned that.

getText(R.string.yourPrefKeyName).toString()

now call it very simply like this in one line of code

global.globalContext.getSharedPreferences(global.APPNAME_PREF, global.MODE_PRIVATE).getBoolean("isMetric", true);

I managed to solve this issue with this call

Properties props = PropertiesUtil.loadProperties("whatever.properties");

Extra, you have to put your whatever.properties file in /src/main/resources

to clone git repo into the current and empty folder (no git init) and if you do not use ssh:

git clone https://github.com/accountName/repoName.git .

You can "fake it" by creating a new HttpContext like this:

http://www.necronet.org/archive/2010/07/28/unit-testing-code-that-uses-httpcontext-current-session.aspx

I've taken that code and put it on an static helper class like so:

public static HttpContext FakeHttpContext()
{
    var httpRequest = new HttpRequest("", "http://example.com/", "");
    var stringWriter = new StringWriter();
    var httpResponse = new HttpResponse(stringWriter);
    var httpContext = new HttpContext(httpRequest, httpResponse);

    var sessionContainer = new HttpSessionStateContainer("id", new SessionStateItemCollection(),
                                            new HttpStaticObjectsCollection(), 10, true,
                                            HttpCookieMode.AutoDetect,
                                            SessionStateMode.InProc, false);

    httpContext.Items["AspSession"] = typeof(HttpSessionState).GetConstructor(
                                BindingFlags.NonPublic | BindingFlags.Instance,
                                null, CallingConventions.Standard,
                                new[] { typeof(HttpSessionStateContainer) },
                                null)
                        .Invoke(new object[] { sessionContainer });

    return httpContext;
}

Or instead of using reflection to construct the new HttpSessionState instance, you can just attach your HttpSessionStateContainer to the HttpContext (as per Brent M. Spell's comment):

SessionStateUtility.AddHttpSessionStateToContext(httpContext, sessionContainer);

and then you can call it in your unit tests like:

HttpContext.Current = MockHelper.FakeHttpContext();

Either link the shell to an object, have the batch job terminate the shell object (exit) and have the VBA code continue once the shell object = Nothing?

Or have a look at this: Capture output value from a shell command in VBA?

I had the same problem for a while and despite doing mvn -U clean install the problem was not getting solved!

I finally solved the problem by deleting the whole .m2 folder and then restarted my IDE and the problem was gone!

So sometimes the problem would rise because of some incompatibilities or problems in your local maven repository.

I came up with this.This seems to work best for me.It converts a string of number and splits it into array of integer:

void splitInput(int arr[], int sizeArr, char num[])
{
    for(int i = 0; i < sizeArr; i++)
        // We are subtracting 48 because the numbers in ASCII starts at 48.
        arr[i] = (int)num[i] - 48;
}

The following would work:

myarray: [
  String1, String2, String3,
  String4, String5, String5, String7
]

I tested it using the snakeyaml implementation, I am not sure about other implementations though.

Regarding your "trick the system" subquestion, you can handle that by normalizing both the "bad word" list and the user-entered text before doing your search. e.g., Use a series of regexes (or tr if PHP has it) to convert [z$5] to "s", [4@] to "a", etc., then compare the normalized "bad word" list against the normalized text. Note that the normalization could potentially lead to additional false positives, although I can't think of any actual cases at the moment.

The larger challenge is to come up with something that will let people quote "The pen is mightier than the sword" while blocking "p e n i s".

You CAN include a modal within a form. In the Bootstrap documentation it recommends the modal to be a "top level" element, but it still works within a form.

You create a form, and then the modal "save" button will be a button of type="submit" to submit the form from within the modal.

<form asp-action="AddUsersToRole" method="POST" class="mb-3">

    @await Html.PartialAsync("~/Views/Users/_SelectList.cshtml", Model.Users)

    <div class="modal fade" id="role-select-modal" tabindex="-1" role="dialog" aria-labelledby="role-select-modal" aria-hidden="true">
        <div class="modal-dialog" role="document">
            <div class="modal-content">
                <div class="modal-header">
                    <h5 class="modal-title" id="exampleModalLabel">Select a Role</h5>
                </div>
                <div class="modal-body">
                    ...
                </div>
                <div class="modal-footer">
                    <button type="submit" class="btn btn-primary">Add Users to Role</button>
                    <button type="button" class="btn btn-secondary" data-dismiss="modal">Cancel</button>
                </div>
            </div>
        </div>
    </div>

</form>

You can post (or GET) your form data to any URL. By default it is the serving page URL, but you can change it by setting the form action. You do not have to use ajax.

Mozilla documentation on form action

Keeping it simple, use Java's String.replaceAll() method as follows:

String fileNameWithExt = "test.xml";
String fileNameWithoutExt
   = fileNameWithExt.replaceAll( "^.*?(([^/\\\\\\.]+))\\.[^\\.]+$", "$1" );

This also works when fileNameWithExt includes the fully qualified path.

With the help of Vonc's answer above I created the following bash script named check.sh:

#!/bin/bash
image_and_tag="$1"
image_and_tag_array=(${image_and_tag//:/ })
if [[ "$(docker images ${image_and_tag_array[0]} | grep ${image_and_tag_array[1]} 2> /dev/null)" != "" ]]; then
  echo "exists"
else
  echo "doesn't exist"
fi

Using it for an existing image and tag will print exists, for example:

./check.sh rabbitmq:3.4.4

Using it for a non-existing image and tag will print doesn't exist, for example:

./check.sh rabbitmq:3.4.3

Without specifying the path you can do:

constructor(private route: ActivatedRoute, private router: Router) { }

reload() {
  this.router.routeReuseStrategy.shouldReuseRoute = () => false;
  this.router.onSameUrlNavigation = 'reload';
  this.router.navigate(['./'], { relativeTo: this.route });
}

And if you use query params you can do:

reload() {
  ...
  this.router.navigate(['./'], { relativeTo: this.route, queryParamsHandling: 'preserve' });
}

Five years later, when I Google "how to create a kernel density plot using python", this thread still shows up at the top!

Today, a much easier way to do this is to use seaborn, a package that provides many convenient plotting functions and good style management.

import numpy as np
import seaborn as sns
data = [1.5]*7 + [2.5]*2 + [3.5]*8 + [4.5]*3 + [5.5]*1 + [6.5]*8
sns.set_style('whitegrid')
sns.kdeplot(np.array(data), bw=0.5)

I faced this issue once and was able to resolve it by fixing of my /etc/hosts. It just was unable to resolve localhost name... Details are here: http://itvictories.com/node/6

In fact, there is 99% that error related to /etc/hosts file

X server just unable to resolve localhost and all consequent actions just fails.

Please be sure that you have a record like

127.0.0.1 localhost

in your /etc/hosts file.

Add:

• DELIMITER at the beginning and end of the SP.
• DROP PROCEDURE IF EXISTS validar_egreso; at the beginning
• When calling the SP, use @variableName.

This works for me. (I modified some part of your script so ANYONE can run it with out having your tables).

DROP PROCEDURE IF EXISTS `validar_egreso`;

DELIMITER $$

CREATE DEFINER='root'@'localhost' PROCEDURE `validar_egreso` (
    IN codigo_producto VARCHAR(100),
    IN cantidad INT,
    OUT valido INT(11)
)
BEGIN

    DECLARE resta INT;
    SET resta = 0;

    SELECT (codigo_producto - cantidad) INTO resta;

    IF(resta > 1) THEN
       SET valido = 1;
    ELSE
       SET valido = -1;
    END IF;

    SELECT valido;
END $$

DELIMITER ;

-- execute the stored procedure
CALL validar_egreso(4, 1, @val);

-- display the result
select @val;

I got the errors to go away by installing the Windows Universal CRT SDK component, which adds support for legacy Windows SDKs. You can install this using the Visual Studio Installer:

If the problem still persists, you should change the Target SDK in the Visual Studio Project : check whether the Windows SDK version is 10.0.15063.0.

In : Project -> Properties -> General -> Windows SDK Version -> select 10.0.15063.0.

Then errno.h and other standard files will be found and it will compile.

JavaScript doesn't have associate arrays. You need to use Objects instead:

var obj = {};
var name = "name";
var val = 2;
obj[name] = val;
console.log(obj);?

To get value you can use now different ways:

console.log(obj.name);?
console.log(obj[name]);?
console.log(obj["name"]);?

Another simple way, without installing anything

1. HTTP function

   authenticate(credentials) {
   
   let body = new URLSearchParams();
   body.set('username', credentials.username);
   body.set('password', credentials.password);
   
   return this.http.post(/rest/myEndpoint, body)
     .subscribe(
     data => this.loginResult = data,
     error => {
       console.log(error);
     },
     () => {
     // function to execute after successfull api call
     }
     );
    }
   

2. Create a proxy.conf.json file

   {
    "/rest": {
   "target": "http://endpoint.com:8080/package/",
   "pathRewrite": {
     "^/rest": ""
   },
   "secure": false
   }
   }
   

3. then ng serve --proxy-config proxy.conf.json (or) open package.json and replace

   "scripts": {
   "start": "ng serve --proxy-config proxy.conf.json",
    },
   

and then npm start

That's it.

Check here https://webpack.github.io/docs/webpack-dev-server.html for more options

Follow up to Eonil's answer related to project level settings. With the target selected and the Build Settings tab selected, there may be no listing under Search Paths for Header Search Paths. In this case, you can change to "All" from "Basic" in the search bar and Header Search Paths will show up in the Search Paths section.

Java Heap Memory is part of memory allocated to JVM by Operating System.

Objects reside in an area called the heap. The heap is created when the JVM starts up and may increase or decrease in size while the application runs. When the heap becomes full, garbage is collected.

You can find more details about Eden Space, Survivor Space, Tenured Space and Permanent Generation in below SE question:

Young , Tenured and Perm generation

PermGen has been replaced with Metaspace since Java 8 release.

Regarding your queries:

1. Eden Space, Survivor Space, Tenured Space are part of heap memory
2. Metaspace and Code Cache are part of non-heap memory.

Codecache: The Java Virtual Machine (JVM) generates native code and stores it in a memory area called the codecache. The JVM generates native code for a variety of reasons, including for the dynamically generated interpreter loop, Java Native Interface (JNI) stubs, and for Java methods that are compiled into native code by the just-in-time (JIT) compiler. The JIT is by far the biggest user of the codecache.

Console.WriteLine(decimal.Round(pay,2));

Basically, Python lists are very flexible and can hold completely heterogeneous, arbitrary data, and they can be appended to very efficiently, in amortized constant time. If you need to shrink and grow your list time-efficiently and without hassle, they are the way to go. But they use a lot more space than C arrays, in part because each item in the list requires the construction of an individual Python object, even for data that could be represented with simple C types (e.g. float or uint64_t).

The array.array type, on the other hand, is just a thin wrapper on C arrays. It can hold only homogeneous data (that is to say, all of the same type) and so it uses only sizeof(one object) * length bytes of memory. Mostly, you should use it when you need to expose a C array to an extension or a system call (for example, ioctl or fctnl).

array.array is also a reasonable way to represent a mutable string in Python 2.x (array('B', bytes)). However, Python 2.6+ and 3.x offer a mutable byte string as bytearray.

However, if you want to do math on a homogeneous array of numeric data, then you're much better off using NumPy, which can automatically vectorize operations on complex multi-dimensional arrays.

To make a long story short: array.array is useful when you need a homogeneous C array of data for reasons other than doing math.

You can use geolocator.js for easily getting timezone and more...

It uses Google APIs that require a key. So, first you configure geolocator:

geolocator.config({
    language: "en",
    google: {
        version: "3",
        key: "YOUR-GOOGLE-API-KEY"
    }
});

Get TimeZone if you have the coordinates:

geolocator.getTimeZone(options, function (err, timezone) {
    console.log(err || timezone);
});

Example output:

{
    id: "Europe/Paris",
    name: "Central European Standard Time",
    abbr: "CEST",
    dstOffset: 0,
    rawOffset: 3600,
    timestamp: 1455733120
}

Locate then get TimeZone and more

If you don't have the coordinates, you can locate the user position first.

Example below will first try HTML5 Geolocation API to get the coordinates. If it fails or rejected, it will get the coordinates via Geo-IP look-up. Finally, it will get the timezone and more...

var options = {
    enableHighAccuracy: true,
    timeout: 6000,
    maximumAge: 0,
    desiredAccuracy: 30,
    fallbackToIP: true, // if HTML5 fails or rejected
    addressLookup: true, // this will get full address information
    timezone: true,
    map: "my-map" // this will even create a map for you
};
geolocator.locate(options, function (err, location) {
    console.log(err || location);
});

Example output:

{
    coords: {
        latitude: 37.4224764,
        longitude: -122.0842499,
        accuracy: 30,
        altitude: null,
        altitudeAccuracy: null,
        heading: null,
        speed: null
    },
    address: {
        commonName: "",
        street: "Amphitheatre Pkwy",
        route: "Amphitheatre Pkwy",
        streetNumber: "1600",
        neighborhood: "",
        town: "",
        city: "Mountain View",
        region: "Santa Clara County",
        state: "California",
        stateCode: "CA",
        postalCode: "94043",
        country: "United States",
        countryCode: "US"
    },
    formattedAddress: "1600 Amphitheatre Parkway, Mountain View, CA 94043, USA",
    type: "ROOFTOP",
    placeId: "ChIJ2eUgeAK6j4ARbn5u_wAGqWA",
    timezone: {
        id: "America/Los_Angeles",
        name: "Pacific Standard Time",
        abbr: "PST",
        dstOffset: 0,
        rawOffset: -28800
    },
    flag: "//cdnjs.cloudflare.com/ajax/libs/flag-icon-css/2.3.1/flags/4x3/us.svg",
    map: {
        element: HTMLElement,
        instance: Object, // google.maps.Map
        marker: Object, // google.maps.Marker
        infoWindow: Object, // google.maps.InfoWindow
        options: Object // map options
    },
    timestamp: 1456795956380
}

A corresponding cross for ✓ ✓ would be ✗ ✗ I think (Dingbats).

For those that want it ISO 8601 compliant, since the other solutions do not have the T separator nor the time offset (except Meistro's answer):

from datetime import datetime, timezone
result = datetime.fromtimestamp(1463288494, timezone.utc).isoformat('T', 'microseconds')
print(result) # 2016-05-15T05:01:34.000000+00:00

Note, I use fromtimestamp because if I used utcfromtimestamp I would need to chain on .astimezone(...) anyway to get the offset.

If you don't want to go all the way to microseconds you can choose a different unit with the isoformat() method.

Are you sure that your address is 168.192.1.2 and not 192.168.1.2?

Notice the swapped first two numbers.

I know this is weird but when I changed GetMapping to PostMapping for both client and server side the error disappeared.

Both client and server are Spring boot projects.

f you want to use $.getJSON() you can add the following before the call :

$.ajaxSetup({
    scriptCharset: "utf-8",
    contentType: "application/json; charset=utf-8"
});

get one column in the distinct select and ignore null values:

 var items = db.table.Where(p => p.id!=null).GroupBy(p => p.id)
                                .Select(grp => grp.First().id)
                                .ToList();

Assuming a windows OS as you mention i p config

If you're willing to install some Unixy utilities like a windows-port of grep and cut you can do that. However, in cases like your example with ipconfig it will be a mess in machines with multiple NICs or e.g VMWare.

Powershell might be the tool you want, look here for a example.

An anonymous namespace makes the enclosed variables, functions, classes, etc. available only inside that file. In your example it's a way to avoid global variables. There is no runtime or compile time performance difference.

There isn't so much an advantage or disadvantage aside from "do I want this variable, function, class, etc. to be public or private?"

Option 1: Put this in your procedure to print 'comment' to stdout when it runs.

SELECT 'Comment';

Option 2: Put this in your procedure to print a variable with it to stdout:

declare myvar INT default 0;
SET myvar = 5;
SELECT concat('myvar is ', myvar);

This prints myvar is 5 to stdout when the procedure runs.

Option 3, Create a table with one text column called tmptable, and push messages to it:

declare myvar INT default 0;
SET myvar = 5;
insert into tmptable select concat('myvar is ', myvar);

You could put the above in a stored procedure, so all you would have to write is this:

CALL log(concat('the value is', myvar));

Which saves a few keystrokes.

Option 4, Log messages to file

select "penguin" as log into outfile '/tmp/result.txt';

There is very heavy restrictions on this command. You can only write the outfile to areas on disk that give the 'others' group create and write permissions. It should work saving it out to /tmp directory.

Also once you write the outfile, you can't overwrite it. This is to prevent crackers from rooting your box just because they have SQL injected your website and can run arbitrary commands in MySQL.

Good evening,

The previous clues to get SQLManagementStudio_x64_ENU.exe runing didn't work as stated for me. After a while of searching, trying, retrying again and again, I finally figured it out. When executing SQLManagementStudio_x64_ENU.exe on my Windows seven system, I kept runing into compatibility issues. The trick is to run SQLManagementStudio_x64_ENU.exe in compatibility mode with Windows XP SP2. Edit the installer properties and enable compatibility mode with XP (service pack 2), then you'll be able to access Mr Doug (answered Mar 4 at 15:09) resolution.

Cheers.

In my case it works like this:

...
<properties>
  <main_dir>${project.parent.relativePath}/..</main_dir>
</properties>
...

<plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>properties-maven-plugin</artifactId>
        <version>1.0-alpha-1</version>
        <executions>
          <execution>
            <phase>initialize</phase>
            <goals>
              <goal>read-project-properties</goal>
            </goals>
            <configuration>
              <files>
                 <file>${main_dir}/maven_custom.properties</file>
              </files>
            </configuration>
          </execution>
        </executions>
</plugin>

you cannot set this in javascript, you have to do this with html/css:

<style type="text/css" media="print">
  @page { size: landscape; }
</style>

EDIT: See this Question and the accepted answer for more information on browser support: Is @Page { size:landscape} obsolete?

y <- mean(x, na.rm=TRUE)

sd(y) for standard deviation var(y) for variance.

Both derivations use n-1 in the denominator so they are based on sample data.

You can use http://www.mergepdf.net/ for example

Or:

PDFTK http://www.pdflabs.com/tools/pdftk-the-pdf-toolkit/

If you are NOT on Ubuntu and you have the same problem (and you wanted to start a new topic on SO and SO suggested to have a look at this question) you can also do it like this:

Things You'll Need:

* Full Version of Adobe Acrobat

1. Open all the .pdf files you wish to merge. These can be minimized on your desktop as individual tabs.

2. Pull up what you wish to be the first page of your merged document.

3. Click the 'Combine Files' icon on the top left portion of the screen.

4. The 'Combine Files' window that pops up is divided into three sections. The first section is titled, 'Choose the files you wish to combine'. Select the 'Add Open Files' option.

5. Select the other open .pdf documents on your desktop when prompted.

6. Rearrange the documents as you wish in the second window, titled, 'Arrange the files in the order you want them to appear in the new PDF'

7. The final window, titled, 'Choose a file size and conversion setting' allows you to control the size of your merged PDF document. Consider the purpose of your new document. If its to be sent as an e-mail attachment, use a low size setting. If the PDF contains images or is to be used for presentation, choose a high setting. When finished, select 'Next'.

8. A final choice: choose between either a single PDF document, or a PDF package, which comes with the option of creating a specialized cover sheet. When finished, hit 'Create', and save to your preferred location.

   • Tips & Warnings

Double check the PDF documents prior to merging to make sure all pertinent information is included. Its much easier to re-create a single PDF page than a multi-page document.

This is the setup I use:

Before running the tests, execute:

export DISPLAY=:99
/etc/init.d/xvfb start

And after the tests:

/etc/init.d/xvfb stop

The init.d file I use looks like this:

#!/bin/bash

XVFB=/usr/bin/Xvfb
XVFBARGS="$DISPLAY -ac -screen 0 1024x768x16"
PIDFILE=${HOME}/xvfb_${DISPLAY:1}.pid
case "$1" in
  start)
    echo -n "Starting virtual X frame buffer: Xvfb"
    /sbin/start-stop-daemon --start --quiet --pidfile $PIDFILE --make-pidfile --background --exec $XVFB -- $XVFBARGS
    echo "."
    ;;
  stop)
    echo -n "Stopping virtual X frame buffer: Xvfb"
    /sbin/start-stop-daemon --stop --quiet --pidfile $PIDFILE
    echo "."
    ;;
  restart)
    $0 stop
    $0 start
    ;;
  *)
  echo "Usage: /etc/init.d/xvfb {start|stop|restart}"
  exit 1
esac
exit 0

It seems all the answers are adding info to e.args[0], thereby altering the existing error message. Is there a downside to extending the args tuple instead? I think the possible upside is, you can leave the original error message alone for cases where parsing that string is needed; and you could add multiple elements to the tuple if your custom error handling produced several messages or error codes, for cases where the traceback would be parsed programmatically (like via a system monitoring tool).

## Approach #1, if the exception may not be derived from Exception and well-behaved:

def to_int(x):
    try:
        return int(x)
    except Exception as e:
        e.args = (e.args if e.args else tuple()) + ('Custom message',)
        raise

>>> to_int('12')
12

>>> to_int('12 monkeys')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 3, in to_int
ValueError: ("invalid literal for int() with base 10: '12 monkeys'", 'Custom message')

or

## Approach #2, if the exception is always derived from Exception and well-behaved:

def to_int(x):
    try:
        return int(x)
    except Exception as e:
        e.args += ('Custom message',)
        raise

>>> to_int('12')
12

>>> to_int('12 monkeys')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 3, in to_int
ValueError: ("invalid literal for int() with base 10: '12 monkeys'", 'Custom message')

Can you see a downside to this approach?

Here is a flexible approach, it can be used in all cases, in particular:

1. to affect only one column, or
2. the dataframe has been obtained from applying previous operations (e.g. not immediately opening a file, or creating a new data frame).

First, un-factorize a string using the as.character function, and, then, re-factorize with the as.factor (or simply factor) function:

fixed <- data.frame("Type" = character(3), "Amount" = numeric(3))

# Un-factorize (as.numeric can be use for numeric values)
#              (as.vector  can be use for objects - not tested)
fixed$Type <- as.character(fixed$Type)
fixed[1, ] <- c("lunch", 100)

# Re-factorize with the as.factor function or simple factor(fixed$Type)
fixed$Type <- as.factor(fixed$Type)

If you want this to be handled by UILabel and not UITextView, you can make UILabel subclass, like this one:

class LinkedLabel: UILabel {

fileprivate let layoutManager = NSLayoutManager()
fileprivate let textContainer = NSTextContainer(size: CGSize.zero)
fileprivate var textStorage: NSTextStorage?


override init(frame aRect:CGRect){
    super.init(frame: aRect)
    self.initialize()
}

required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
    self.initialize()
}

func initialize(){

    let tap = UITapGestureRecognizer(target: self, action: #selector(LinkedLabel.handleTapOnLabel))
    self.isUserInteractionEnabled = true
    self.addGestureRecognizer(tap)
}

override var attributedText: NSAttributedString?{
    didSet{
        if let _attributedText = attributedText{
            self.textStorage = NSTextStorage(attributedString: _attributedText)

            self.layoutManager.addTextContainer(self.textContainer)
            self.textStorage?.addLayoutManager(self.layoutManager)

            self.textContainer.lineFragmentPadding = 0.0;
            self.textContainer.lineBreakMode = self.lineBreakMode;
            self.textContainer.maximumNumberOfLines = self.numberOfLines;
        }

    }
}

func handleTapOnLabel(tapGesture:UITapGestureRecognizer){

    let locationOfTouchInLabel = tapGesture.location(in: tapGesture.view)
    let labelSize = tapGesture.view?.bounds.size
    let textBoundingBox = self.layoutManager.usedRect(for: self.textContainer)
    let textContainerOffset = CGPoint(x: ((labelSize?.width)! - textBoundingBox.size.width) * 0.5 - textBoundingBox.origin.x, y: ((labelSize?.height)! - textBoundingBox.size.height) * 0.5 - textBoundingBox.origin.y)

    let locationOfTouchInTextContainer = CGPoint(x: locationOfTouchInLabel.x - textContainerOffset.x, y: locationOfTouchInLabel.y - textContainerOffset.y)
    let indexOfCharacter = self.layoutManager.characterIndex(for: locationOfTouchInTextContainer, in: self.textContainer, fractionOfDistanceBetweenInsertionPoints: nil)


    self.attributedText?.enumerateAttribute(NSLinkAttributeName, in: NSMakeRange(0, (self.attributedText?.length)!), options: NSAttributedString.EnumerationOptions(rawValue: UInt(0)), using:{
        (attrs: Any?, range: NSRange, stop: UnsafeMutablePointer<ObjCBool>) in

        if NSLocationInRange(indexOfCharacter, range){
            if let _attrs = attrs{

                UIApplication.shared.openURL(URL(string: _attrs as! String)!)
            }
        }
    })

}}

This class was made by reusing code from this answer. In order to make attributed strings check out this answer. And here you can find how to make phone urls.

The other posters are correct you cannot connect to MySQL directly from javascript. This is because JavaScript is at client side & mysql is server side.

So your best bet is to use ajax to call a handler as quoted above if you can let us know what language your project is in we can better help you ie php/java/.net

If you project is using php then the example from Merlyn is a good place to start, I would personally use jquery.ajax() to cut down you code and have a better chance of less cross browser issues.

http://api.jquery.com/jQuery.ajax/

iOS

Solution:

Within a custom ViewCellRenderer you can set the SelectedBackgroundView. Simply create a new UIView with a background color of your choice and you're set.

public override UITableViewCell GetCell(Cell item, UITableViewCell reusableCell, UITableView tv)
{
    var cell =  base.GetCell(item, reusableCell, tv);

    cell.SelectedBackgroundView = new UIView {
        BackgroundColor = UIColor.DarkGray,
    };

    return cell;
}

Result:

Note:

With Xamarin.Forms it seems to be important to create a new UIView rather than just setting the background color of the current one.

Android

Solution:

The solution I found on Android is a bit more complicated:

1. Create a new drawable ViewCellBackground.xml within the Resources>drawable folder:

   <?xml version="1.0" encoding="UTF-8" ?>
   <selector xmlns:android="http://schemas.android.com/apk/res/android">
       <item android:state_pressed="true" >
           <shape android:shape="rectangle">
               <solid android:color="#333333" />
           </shape>
       </item>
       <item>
           <shape android:shape="rectangle">
               <solid android:color="#000000" />
           </shape>
       </item>
   </selector>
   

   It defines solid shapes with different colors for the default state and the "pressed" state of a UI element.

2. Use a inherited class for the View of your ViewCell, e.g.:

   public class TouchableStackLayout: StackLayout
   {
   }
   

3. Implement a custom renderer for this class setting the background resource:

   public class ElementRenderer: VisualElementRenderer<Xamarin.Forms.View>
   {
       protected override void OnElementChanged(ElementChangedEventArgs<Xamarin.Forms.View> e)
       {
           SetBackgroundResource(Resource.Drawable.ViewCellBackground);
   
           base.OnElementChanged(e);
       }
   }
   

Result:

There is a much easier way than everything above and this approach does not require the use of android.permission.GET_TASKS in the manifest, or have the issue of race conditions or memory leaks pointed out in the accepted answer.

1. Make a STATIC variable in the main Activity. Static allows other activities to receive the data from another activity. onPause() set this variable false, onResume and onCreate() set this variable true.

   private static boolean mainActivityIsOpen;
   

2. Assign getters and setters of this variable.

   public static boolean mainActivityIsOpen() {
       return mainActivityIsOpen;
   }
   
   public static void mainActivityIsOpen(boolean mainActivityIsOpen) {
       DayView.mainActivityIsOpen = mainActivityIsOpen;
   }
   

3. And then from another activity or Service

   if (MainActivity.mainActivityIsOpen() == false)
   {
                   //do something
   }
   else if(MainActivity.mainActivityIsOpen() == true)
   {//or just else. . . ( or else if, does't matter)
           //do something
   }
   

Jquery One-liners:

ES6 + jQuery:

$('#select').append([...Array(100).keys()].map((i,j) => `< option >${i}</option >`))

Lodash + jQuery:

$('#select').append(_.range(100).map(function(i,j){ return $('<option>',{text:i})}))

To split on a string you need to use the overload that takes an array of strings:

string[] lines = theText.Split(
    new[] { Environment.NewLine },
    StringSplitOptions.None
);

Edit:
If you want to handle different types of line breaks in a text, you can use the ability to match more than one string. This will correctly split on either type of line break, and preserve empty lines and spacing in the text:

string[] lines = theText.Split(
    new[] { "\r\n", "\r", "\n" },
    StringSplitOptions.None
);

Hope this can help u ...

Filename = MainActivity.java

import android.os.Bundle;
import android.app.Activity;
import android.telephony.SmsManager;
import android.view.Menu;
import android.view.inputmethod.InputMethodManager;
import android.widget.*;
import android.view.View.OnClickListener;
import android.view.*;


public class MainActivity extends Activity implements OnClickListener{


  Button click;
  EditText txt;
  TextView txtvw;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    click = (Button)findViewById(R.id.button);
    txt = (EditText)findViewById(R.id.editText);
    txtvw = (TextView)findViewById(R.id.textView1);

    click.setOnClickListener(this);
}

@Override
public void onClick(View v){


    txt.setText("");
    v = this.getCurrentFocus();

    try{
        SmsManager sms = SmsManager.getDefault();
        sms.sendTextMessage("8017891398",null,"Sent from Android",null,null);
    }
    catch(Exception e){
        txtvw.setText("Message not sent!");
    }
    if(v != null){
        InputMethodManager imm = (InputMethodManager)getSystemService(INPUT_METHOD_SERVICE);
        imm.hideSoftInputFromWindow(v.getWindowToken(),0);
    }

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
  }

}

add this line in AndroidManifest.xml

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

Assume that we need to view some data in command prompt which are coming from a database table. First we create a list. Team_Details is my property class.

    List<Team_Details> teamDetails = new List<Team_Details>();

Then you can connect to the database and do the data retrieving part and save it to the list as follows.

            string connetionString = "Data Source=.;Initial Catalog=your DB name;Integrated Security=True;MultipleActiveResultSets=True";
            using (SqlConnection conn = new SqlConnection(connetionString)){
            string getTeamDetailsQuery = "select * from Team";
            conn.Open();
            using (SqlCommand cmd = new SqlCommand(getTeamDetailsQuery, conn))
                    {
                        SqlDataReader rdr = cmd.ExecuteReader();
                    {
                        teamDetails.Add(new Team_Details
                        {
                            Team_Name = rdr.GetString(rdr.GetOrdinal("Team_Name")),
                            Team_Lead = rdr.GetString(rdr.GetOrdinal("Team_Lead")),
                        });
                    }

Then you can print this list in command prompt as follows.

foreach (Team_Details i in teamDetails)
                        {
                            Console.WriteLine(i.Team_Name);
                            Console.WriteLine(i.Team_Lead);
                        }

I've collected info together:

• add into scope user_link, see https://developers.facebook.com/docs/facebook-login/permissions/
• add into fields request link (e.g. https://graph.facebook.com/me?fields=link,name,email)
• get link from answer. Be aware of field length- in my case it is 202: https://www.facebook.com/app_scoped_user_id/YXNpZADpBWEd0SlhFZAElYa3BQT3U3Tm4xWVRLSlJfYUdUM3Y4YmIwQjBaRkM0VDBMNURQdUhhYk5NRDJoR1ZA5ZA1JOdGNwampsSTQyMDQwbW93bkp0dnZAmOXg3NTFISFVZAQlRscWQ5eEZAvcU4xZAC1B/

And finaly: it doen't work without additional Facebook permission check:(

What is blob url? Why it is used?

BLOB is just byte sequence. Browser recognize it as byte stream. It is used to get byte stream from source.

A Blob object represents a file-like object of immutable, raw data. Blobs represent data that isn't necessarily in a JavaScript-native format. The File interface is based on Blob, inheriting blob functionality and expanding it to support files on the user's system.

Can i make my own blob url on a server?

Yes you can there are serveral ways to do so for example try http://php.net/manual/en/function.ibase-blob-echo.php

Read more on

• https://developer.mozilla.org/pl/docs/Web/API/Blob
• http://www.w3.org/TR/FileAPI/#dfn-Blob
• https://url.spec.whatwg.org/#urls

// This is wrong 
categoryTitle.textColor = [UIColor colorWithRed:188 green:149 blue:88 alpha:1.0];

// This should be  
categoryTitle.textColor = [UIColor colorWithRed:188/255 green:149/255 blue:88/255 alpha:1.0];

// In the documentation, the limit of the parameters are mentioned.

colorWithRed:green:blue:alpha: documentation link

You can either use onclick inside the button to ensure the event is preserved, or else attach the button click handler by finding the button after it is inserted. The test.html() call will not serialize the event.

This combines all of the approaches from previous methods and should have equivalent performance. It can be used for any enum, inlines the "Edit" solution from @Richard H, and uses Exceptions for invalid values like @bestsss. The only tradeoff is that the class needs to be specified, but that turns this into a two-liner.

import java.util.EnumSet;

public class HelloWorld {

static enum Choices {a1, a2, b1, b2}

public static <E extends Enum<E>> boolean contains(Class<E> _enumClass, String value) {
    try {
        return EnumSet.allOf(_enumClass).contains(Enum.valueOf(_enumClass, value));    
    } catch (Exception e) {
        return false; 
    }
}

public static void main(String[] args) {
    for (String value : new String[] {"a1", "a3", null}) {
        System.out.println(contains(Choices.class, value));
    }
}

}

I haven't tested this but could you use a set of pairs of iterators instead? Each iterator pair would represent the begin and end iterator of the sequence vector. E.g.:

typedef std::vector<int> Seq;
typedef std::pair<Seq::const_iterator, Seq::const_iterator> SeqRange;

bool operator< (const SeqRange& lhs, const SeqRange& rhs)
{
    Seq::const_iterator lhsNext = lhs.first;
    Seq::const_iterator rhsNext = rhs.first;

    while (lhsNext != lhs.second && rhsNext != rhs.second)
        if (*lhsNext < *rhsNext)
            return true;
        else if (*lhsNext > *rhsNext)
            return false;

    return false;
}

typedef std::set<SeqRange, std::less<SeqRange> > SeqSet;

Seq sequences;

void test (const SeqSet& seqSet, const SeqRange& seq)
{
    bool find = seqSet.find (seq) != seqSet.end ();
    bool find2 = seqSet.find (SeqRange (seq.first + 1, seq.second)) != seqSet.end ();
}

Obviously the vectors have to be held elsewhere as before. Also if a sequence vector is modified then its entry in the set would have to be removed and re-added as the iterators may have changed.

Jon

Most answer are assuming the RecyclerView uses a LinearLayoutManager, or GridLayoutManager, or even StaggeredGridLayoutManager, or assuming that the scrolling is vertical or horyzontal, but no one has posted a completly generic answer.

Using the ViewHolder's adapter is clearly not a good solution. An adapter might have more than 1 RecyclerView using it. It "adapts" their contents. It should be the RecyclerView (which is the one class which is responsible of what is currently displayed to the user, and not the adapter which is responsible only to provide content to the RecyclerView) which must notify your system that more items are needed (to load).

Here is my solution, using nothing else than the abstracted classes of the RecyclerView (RecycerView.LayoutManager and RecycerView.Adapter):

/**
 * Listener to callback when the last item of the adpater is visible to the user.
 * It should then be the time to load more items.
 **/
public abstract class LastItemListener extends RecyclerView.OnScrollListener {

    @Override
    public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
      super.onScrolled(recyclerView, dx, dy);

      // init
      RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
      RecyclerView.Adapter adapter = recyclerView.getAdapter();

      if (layoutManager.getChildCount() > 0) {
        // Calculations..
        int indexOfLastItemViewVisible = layoutManager.getChildCount() -1;
        View lastItemViewVisible = layoutManager.getChildAt(indexOfLastItemViewVisible);
        int adapterPosition = layoutManager.getPosition(lastItemViewVisible);
        boolean isLastItemVisible = (adapterPosition == adapter.getItemCount() -1);

        // check
        if (isLastItemVisible)
          onLastItemVisible(); // callback
     }
   }

   /**
    * Here you should load more items because user is seeing the last item of the list.
    * Advice: you should add a bollean value to the class
    * so that the method {@link #onLastItemVisible()} will be triggered only once
    * and not every time the user touch the screen ;)
    **/
   public abstract void onLastItemVisible();

}


// --- Exemple of use ---

myRecyclerView.setOnScrollListener(new LastItemListener() {
    public void onLastItemVisible() {
         // start to load more items here.
    }
}

Here's a C# function that prepends a text line to an existing text blob, delimited by CRLFs, and returns a T-SQL expression suitable for INSERT or UPDATE operations. It's got some of our proprietary error handling in it, but once you rip that out, it may be helpful -- I hope so.

/// <summary>
/// Generate a SQL string value expression suitable for INSERT/UPDATE operations that prepends
/// the specified line to an existing block of text, assumed to have \r\n delimiters, and
/// truncate at a maximum length.
/// </summary>
/// <param name="sNewLine">Single text line to be prepended to existing text</param>
/// <param name="sOrigLines">Current text value; assumed to be CRLF-delimited</param>
/// <param name="iMaxLen">Integer field length</param>
/// <returns>String: SQL string expression suitable for INSERT/UPDATE operations.  Empty on error.</returns>
private string PrependCommentLine(string sNewLine, String sOrigLines, int iMaxLen)
{
    String fn = MethodBase.GetCurrentMethod().Name;

    try
    {
        String [] line_array = sOrigLines.Split("\r\n".ToCharArray());
        List<string> orig_lines = new List<string>();
        foreach(String orig_line in line_array) 
        { 
            if (!String.IsNullOrEmpty(orig_line))  
            {  
                orig_lines.Add(orig_line);    
            }
        } // end foreach(original line)

        String final_comments = "'" + sNewLine + "' + CHAR(13) + CHAR(10) ";
        int cum_length = sNewLine.Length + 2;
        foreach(String orig_line in orig_lines)
        {
            String curline = orig_line;
            if (cum_length >= iMaxLen) break;                // stop appending if we're already over
            if ((cum_length+orig_line.Length+2)>=iMaxLen)    // If this one will push us over, truncate and warn:
            {
                Util.HandleAppErr(this, fn, "Truncating comments: " + orig_line);
                curline = orig_line.Substring(0, iMaxLen - (cum_length + 3));
            }
            final_comments += " + '" + curline + "' + CHAR(13) + CHAR(10) \r\n";
            cum_length += orig_line.Length + 2;
        } // end foreach(second pass on original lines)

        return(final_comments);


    } // end main try()
    catch(Exception exc)
    {
        Util.HandleExc(this,fn,exc);
        return("");
    }
}

It doesn't recognize that you have a master branch, but I found a way to get around it. I found out that there's nothing special about a master branch, you can just create another branch and call it master branch and that's what I did.

To create a master branch:

git checkout -b master

And you can work off of that.

You can do this with wget usually. wget --content-disposition "url" additionally if you add -O /dev/null you will not be actually saving the file.

wget -O /dev/null --content-disposition example.com

There is also an alternative way to use MarkupExtension in order to use Binding for a ConverterParameter. With this solution you can still use the default IValueConverter instead of the IMultiValueConverter because the ConverterParameter is passed into the IValueConverter just like you expected in your first sample.

Here is my reusable MarkupExtension:

/// <summary>
///     <example>
///         <TextBox>
///             <TextBox.Text>
///                 <wpfAdditions:ConverterBindableParameter Binding="{Binding FirstName}"
///                     Converter="{StaticResource TestValueConverter}"
///                     ConverterParameterBinding="{Binding ConcatSign}" />
///             </TextBox.Text>
///         </TextBox>
///     </example>
/// </summary>

[ContentProperty(nameof(Binding))]
public class ConverterBindableParameter : MarkupExtension
{
    #region Public Properties

    public Binding Binding { get; set; }
    public BindingMode Mode { get; set; }
    public IValueConverter Converter { get; set; }
    public Binding ConverterParameter { get; set; }

    #endregion

    public ConverterBindableParameter()
    { }

    public ConverterBindableParameter(string path)
    {
        Binding = new Binding(path);
    }

    public ConverterBindableParameter(Binding binding)
    {
        Binding = binding;
    }

    #region Overridden Methods

    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        var multiBinding = new MultiBinding();
        Binding.Mode = Mode;
        multiBinding.Bindings.Add(Binding);
        if (ConverterParameter != null)
        {
            ConverterParameter.Mode = BindingMode.OneWay;
            multiBinding.Bindings.Add(ConverterParameter);
        }
        var adapter = new MultiValueConverterAdapter
        {
            Converter = Converter
        };
        multiBinding.Converter = adapter;
        return multiBinding.ProvideValue(serviceProvider);
    }

    #endregion

    [ContentProperty(nameof(Converter))]
    private class MultiValueConverterAdapter : IMultiValueConverter
    {
        public IValueConverter Converter { get; set; }

        private object lastParameter;

        public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
        {
            if (Converter == null) return values[0]; // Required for VS design-time
            if (values.Length > 1) lastParameter = values[1];
            return Converter.Convert(values[0], targetType, lastParameter, culture);
        }

        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
        {
            if (Converter == null) return new object[] { value }; // Required for VS design-time

            return new object[] { Converter.ConvertBack(value, targetTypes[0], lastParameter, culture) };
        }
    }
}

With this MarkupExtension in your code base you can simply bind the ConverterParameter the following way:

<Style TargetType="FrameworkElement">
<Setter Property="Visibility">
    <Setter.Value>
     <wpfAdditions:ConverterBindableParameter Binding="{Binding Tag, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type UserControl}"
                 Converter="{StaticResource AccessLevelToVisibilityConverter}"
                 ConverterParameterBinding="{Binding RelativeSource={RelativeSource Mode=Self}, Path=Tag}" />          
    </Setter.Value>
</Setter>

Which looks almost like your initial proposal.

My minimal approach

For converting negative number to positive & vice-versa

var num = -24;_x000D_
num -= num*2;_x000D_
console.log(num)_x000D_
// result = 24

main logic behind this is_,

NSString * storyboardIdentifier = @"SecondStoryBoard";

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:storyboardIdentifier bundle: nil];

UIViewController * UIVC = [storyboard instantiateViewControllerWithIdentifier:@"YourviewControllerIdentifer"];

[self presentViewController:UIVC animated:YES completion:nil];

This RE will do:

/^(?:[0-9]+[a-z]|[a-z]+[0-9])[a-z0-9]*$/i

Explanation of RE:

• Match either of the following:
  1. At least one number, then one letter or
  2. At least one letter, then one number plus
• Any remaining numbers and letters
  
  
• (?:...) creates an unreferenced group
• /i is the ignore-case flag, so that a-z == a-zA-Z.

def insenStringCompare(s1, s2):
    """ Method that takes two strings and returns True or False, based
        on if they are equal, regardless of case."""
    try:
        return s1.lower() == s2.lower()
    except AttributeError:
        print "Please only pass strings into this method."
        print "You passed a %s and %s" % (s1.__class__, s2.__class__)

yes, these are the well-known quantifiers used in math. Another example is ? which reads as "exists".

http://en.wikipedia.org/wiki/Quantification

I had a similar symptom. In my case though, my idiocy was in unintentionally also having an empty index.html file in the web root folder. Apache was serving this rather than index.php when I didn't explicitly request index.php, since DirectoryIndex was configured as follows in mods-available/dir.conf:

DirectoryIndex index.html index.cgi index.pl index.php index.xhtml index.htm

That is, 'index.html' appears ahead of 'index.php' in the priority list. Removing the index.html file from the web root naturally resolved the problem. D'oh!

You can catch it like any other exception:

try {
  foo();
}
catch (const std::bad_alloc&) {
  return -1;
}

Quite what you can usefully do from this point is up to you, but it's definitely feasible technically.

In general you cannot, and should not try, to respond to this error. bad_alloc indicates that a resource cannot be allocated because not enough memory is available. In most scenarios your program cannot hope to cope with that, and terminating soon is the only meaningful behaviour.

Worse, modern operating systems often over-allocate: on such systems, malloc and new can return a valid pointer even if there is not enough free memory left – std::bad_alloc will never be thrown, or is at least not a reliable sign of memory exhaustion. Instead, attempts to access the allocated memory will then result in a segmentation fault, which is not catchable (you can handle the segmentation fault signal, but you cannot resume the program afterwards).

The only thing you could do when catching std::bad_alloc is to perhaps log the error, and try to ensure a safe program termination by freeing outstanding resources (but this is done automatically in the normal course of stack unwinding after the error gets thrown if the program uses RAII appropriately).

In certain cases, the program may attempt to free some memory and try again, or use secondary memory (= disk) instead of RAM but these opportunities only exist in very specific scenarios with strict conditions:

1. The application must ensure that it runs on a system that does not overcommit memory, i.e. it signals failure upon allocation rather than later.
2. The application must be able to free memory immediately, without any further accidental allocations in the meantime.

It’s exceedingly rare that applications have control over point 1 — userspace applications never do, it’s a system-wide setting that requires root permissions to change.¹

OK, so let’s assume you’ve fixed point 1. What you can now do is for instance use a LRU cache for some of your data (probably some particularly large business objects that can be regenerated or reloaded on demand). Next, you need to put the actual logic that may fail into a function that supports retry — in other words, if it gets aborted, you can just relaunch it:

lru_cache<widget> widget_cache;

double perform_operation(int widget_id) {
    std::optional<widget> maybe_widget = widget_cache.find_by_id(widget_id);
    if (not maybe_widget) {
        maybe_widget = widget_cache.store(widget_id, load_widget_from_disk(widget_id));
    }
    return maybe_widget->frobnicate();
}

…

for (int num_attempts = 0; num_attempts < MAX_NUM_ATTEMPTS; ++num_attempts) {
    try {
        return perform_operation(widget_id);
    } catch (std::bad_alloc const&) {
        if (widget_cache.empty()) throw; // memory error elsewhere.
        widget_cache.remove_oldest();
    }
}

// Handle too many failed attempts here.

But even here, using std::set_new_handler instead of handling std::bad_alloc provides the same benefit and would be much simpler.

¹ If you’re creating an application that does control point 1, and you’re reading this answer, please shoot me an email, I’m genuinely curious about your circumstances.

What is the C++ Standard specified behavior of new in c++?

The usual notion is that if new operator cannot allocate dynamic memory of the requested size, then it should throw an exception of type std::bad_alloc.
However, something more happens even before a bad_alloc exception is thrown:

C++03 Section 3.7.4.1.3: says

An allocation function that fails to allocate storage can invoke the currently installed new_handler(18.4.2.2), if any. [Note: A program-supplied allocation function can obtain the address of the currently installed new_handler using the set_new_handler function (18.4.2.3).] If an allocation function declared with an empty exception-specification (15.4), throw(), fails to allocate storage, it shall return a null pointer. Any other allocation function that fails to allocate storage shall only indicate failure by throw-ing an exception of class std::bad_alloc (18.4.2.1) or a class derived from std::bad_alloc.

Consider the following code sample:

#include <iostream>
#include <cstdlib>

// function to call if operator new can't allocate enough memory or error arises
void outOfMemHandler()
{
    std::cerr << "Unable to satisfy request for memory\n";

    std::abort();
}

int main()
{
    //set the new_handler
    std::set_new_handler(outOfMemHandler);

    //Request huge memory size, that will cause ::operator new to fail
    int *pBigDataArray = new int[100000000L];

    return 0;
}

In the above example, operator new (most likely) will be unable to allocate space for 100,000,000 integers, and the function outOfMemHandler() will be called, and the program will abort after issuing an error message.

As seen here the default behavior of new operator when unable to fulfill a memory request, is to call the new-handler function repeatedly until it can find enough memory or there is no more new handlers. In the above example, unless we call std::abort(), outOfMemHandler() would be called repeatedly. Therefore, the handler should either ensure that the next allocation succeeds, or register another handler, or register no handler, or not return (i.e. terminate the program). If there is no new handler and the allocation fails, the operator will throw an exception.

What is the new_handler and set_new_handler?

new_handler is a typedef for a pointer to a function that takes and returns nothing, and set_new_handler is a function that takes and returns a new_handler.

Something like:

typedef void (*new_handler)();
new_handler set_new_handler(new_handler p) throw();

set_new_handler's parameter is a pointer to the function operator new should call if it can't allocate the requested memory. Its return value is a pointer to the previously registered handler function, or null if there was no previous handler.

How to handle out of memory conditions in C++?

Given the behavior of newa well designed user program should handle out of memory conditions by providing a proper new_handlerwhich does one of the following:

Make more memory available: This may allow the next memory allocation attempt inside operator new's loop to succeed. One way to implement this is to allocate a large block of memory at program start-up, then release it for use in the program the first time the new-handler is invoked.

Install a different new-handler: If the current new-handler can't make any more memory available, and of there is another new-handler that can, then the current new-handler can install the other new-handler in its place (by calling set_new_handler). The next time operator new calls the new-handler function, it will get the one most recently installed.

(A variation on this theme is for a new-handler to modify its own behavior, so the next time it's invoked, it does something different. One way to achieve this is to have the new-handler modify static, namespace-specific, or global data that affects the new-handler's behavior.)

Uninstall the new-handler: This is done by passing a null pointer to set_new_handler. With no new-handler installed, operator new will throw an exception ((convertible to) std::bad_alloc) when memory allocation is unsuccessful.

Throw an exception convertible to std::bad_alloc. Such exceptions are not be caught by operator new, but will propagate to the site originating the request for memory.

Not return: By calling abort or exit.

Should just be this:

var jobject = JsonConvert.DeserializeObject<RootObject>(jsonstring);

You can paste the json string to here: http://json2csharp.com/ to check your classes are correct.

On Error Statement - Specifies that when a run-time error occurs, control goes to the statement immediately following the statement. How ever Err object got populated.(Err.Number, Err.Count etc)

As has been pointed out in some other answers and comments, what you are missing here is a call to the JVM System class to print out the string generated by your toString() method.

LinkedList myLinkedList = new LinkedList();
System.out.println(myLinkedList.toString());

This will get the job done, but I wouldn't recommend doing it that way. If we take a look at the javadocs for the Object class, we find this description for toString():

Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

The emphasis added there is my own. You are creating a string that contains the entire state of the linked list, which somebody using your class is probably not expecting. I would recommend the following changes:

1. Add a toString() method to your LinkedListNode class.
2. Update the toString() method in your LinkedList class to be more concise.
3. Add a new method called printList() to your LinkedList class that does what you are currently expecting toString() to do.

In LinkedListNode:

public String toString(){
   return "LinkedListNode with data: " + getData();
}

In LinkedList:

public int size(){
    int currentSize = 0;
    LinkedListNode current = head;
    while(current != null){
        currentSize = currentSize + 1;
        current = current.getNext();
    }

    return currentSize;
}

public String toString(){
    return "LinkedList with " + size() + "elements.";
}

public void printList(){
    System.out.println("Contents of " + toString());

    LinkedListNode current = head;
    while(current != null){
        System.out.println(current.toString());
        current = current.getNext();
    }

}

:set nobackup 

will turn off backups. You can also set a backupdir if you still want those backup files but in a central folder. This way your working dir is not littered with ~ files.

You find more information on backups under :he backup.

IsPostBack is a property of the Asp.Net page that tells whether or not the page is on its initial load and if a user has perform a button on your web page that has caused the page to post back to itself.

more on ... Asp.Net ispostback()

Servlet Life Cycle

The lifecycle of a servlet is controlled by the container in which the servlet has been deployed. When a request is mapped to a servlet, the container performs the following steps.

1. If an instance of the servlet does not exist, the web container:

   a. Loads the servlet class

   b. Creates an instance of the servlet class

   c. Initializes the servlet instance by calling the init method (initialization is covered in Creating and Initializing a Servlet)

2. The container invokes the service method, passing request and response objects. Service methods are discussed in Writing Service Methods.

A 0 value on load-on-startup means that point 1 is executed when a request comes to that servlet. Other values means that point 1 is executed at container startup.

String temp = passwordSalt;
byte[] byteSalt = temp.getBytes();
int start = 32;
for (int i = 0; i < byteData.length; i ++)
{
    byteData[start + i] = byteSalt[i];
}

The problem with your code here is that the variable i that is being used to index the arrays is going past both the byteSalt array and the byteData array. So, Make sure that byteData is dimensioned to be at least the maximum length of the passwordSalt string plus 32. What will correct it is replacing the following line:

for (int i = 0; i < byteData.length; i ++)

with:

for (int i = 0; i < byteSalt.length; i ++)

As others mentioned, argv[0] is quite a nice solution, provided that the platform actually passes the executable path, which is surely not less probable than the OS being Windows (where WinAPI can help find the executable path). If you want to strip the string to only include the path to the directory where the executable resides, then using that path to find other application files (like game assets if your program is a game) is perfectly fine, since opening files is relative to the working directory, or, if provided, the root.

I ended up implementing my own adapter to wrap any other adapter and provide methods to add header and footer views.

Created a gist here: HeaderViewRecyclerAdapter.java

The main feature I wanted was a similar interface to a ListView, so I wanted to be able to inflate the views in my Fragment and add them to the RecyclerView in onCreateView. This is done by creating a HeaderViewRecyclerAdapter passing the adapter to be wrapped, and calling addHeaderView and addFooterView passing your inflated views. Then set the HeaderViewRecyclerAdapter instance as the adapter on the RecyclerView.

An extra requirement was that I needed to be able to easily swap out adapters while keeping the headers and footers, I didn't want to have multiple adapters with multiple instances of these headers and footers. So you can call setAdapter to change the wrapped adapter leaving the headers and footers intact, with the RecyclerView being notified of the change.

I always just convert a matrix:

x <- as.data.frame(matrix(nrow = 100, ncol = 10))

It is simple to achieve by the following

DECLARE @SomeString NVARCHAR(20) = 'This is some string'
DECLARE @Result NVARCHAR(20)

Either

SET @Result = SUBSTRING(@SomeString, 2, 3)
SELECT @Result

@Result = his

or

SET @Result = LEFT(@SomeString, 6)
SELECT @Result

@Result = This i

The registry path for official images (without a slash in the name) is library/<image>. Try this instead:

docker pull registry.hub.docker.com/library/busybox

In full generality, this functionality is impossible. The Java ClassLoader mechanism guarantees only the ability to ask for a class with a specific name (including pacakge), and the ClassLoader can supply a class, or it can state that it does not know that class.

Classes can be (and frequently are) loaded from remote servers, and they can even be constructed on the fly; it is not difficult at all to write a ClassLoader that returns a valid class that implements a given interface for any name you ask from it; a List of the classes that implement that interface would then be infinite in length.

In practice, the most common case is an URLClassLoader that looks for classes in a list of filesystem directories and JAR files. So what you need is to get the URLClassLoader, then iterate through those directories and archives, and for each class file you find in them, request the corresponding Class object and look through the return of its getInterfaces() method.

Check out the BeamIt open source project. It will connect via bluetooth and WIFI (although it claims it does not do WIFI) and I have verified that it works well in my projects. It will allow peer to peer contact easily.

As for multiple connections, it is possible, but you will have to edit the BeamIt source code to make it possible. I suggest reading the GameKit programming guide

Click the gear in the Project tool window and then Always Select Opened File (previously Autoscroll From Source)

This thread has some considerable debate about whether BN should be applied before non-linearity of current layer or to the activations of the previous layer.

Although there is no correct answer, the authors of Batch Normalization say that It should be applied immediately before the non-linearity of the current layer. The reason ( quoted from original paper) -

"We add the BN transform immediately before the nonlinearity, by normalizing x = Wu+b. We could have also normalized the layer inputs u, but since u is likely the output of another nonlinearity, the shape of its distribution is likely to change during training, and constraining its first and second moments would not eliminate the covariate shift. In contrast, Wu + b is more likely to have a symmetric, non-sparse distribution, that is “more Gaussian” (Hyv¨arinen & Oja, 2000); normalizing it is likely to produce activations with a stable distribution."

From what I've seen, the void operator has 3 common uses in JavaScript. The one that you're referring to, <a href="javascript:void(0)"> is a common trick to make an <a> tag a no-op. Some browsers treat <a> tags differently based on whether they have a href , so this is a way to create a link with a href that does nothing.

The void operator is a unary operator that takes an argument and returns undefined. So var x = void 42; means x === undefined. This is useful because, outside of strict mode, undefined is actually a valid variable name. So some JavaScript developers use void 0 instead of undefined. In theory, you could also do <a href="javascript:undefined"> and it would so the same thing as void(0).

I had exactly the same problem. Just one more working modification of the solution given by Denis (the type must be specified):

SELECT ARRAY(
SELECT column_name::text
FROM information_schema.columns
WHERE table_name='aean'
)

All's correct. return logically processes from left to right and returns the last value.

function foo(){
    return 1,2,3;
}

>> foo()
>> 3

this.button2.BaseColor = System.Drawing.Color.FromArgb(((int)(((byte)(29)))), ((int)(((byte)(190)))), ((int)(((byte)(149)))));

Adding to Dan's answer above: if you supply the int() function with a hex string, you will have to specify the base as 16 or it will not think you gave it a valid value. Specifying base 16 is unnecessary for hex numbers not contained in strings.

print int(0xdeadbeef) # valid

myHex = "0xdeadbeef"
print int(myHex) # invalid, raises ValueError
print int(myHex , 16) # valid

Zcron is available free for personal use.

I know this is 2 year old question but as every body faces a problem to round off the values at some point of time.I would like to share a different way which can give us rounded values to any scale by using BigDecimal class .Here we can avoid extra steps which are required to get the final value if we use DecimalFormat("0.00") or using Math.round(a * 100) / 100 .

import java.math.BigDecimal;

public class RoundingNumbers {
    public static void main(String args[]){
        double number = 123.13698;
        int decimalsToConsider = 2;
        BigDecimal bigDecimal = new BigDecimal(number);
        BigDecimal roundedWithScale = bigDecimal.setScale(2, BigDecimal.ROUND_HALF_UP);
        System.out.println("Rounded value with setting scale = "+roundedWithScale);

        bigDecimal = new BigDecimal(number);
        BigDecimal roundedValueWithDivideLogic = bigDecimal.divide(BigDecimal.ONE,decimalsToConsider,BigDecimal.ROUND_HALF_UP);
        System.out.println("Rounded value with Dividing by one = "+roundedValueWithDivideLogic);

    }
}

This program would give us below output

Rounded value with setting scale = 123.14
Rounded value with Dividing by one = 123.14

The easiest way would be to package the Vagrant box and then copy (e.g. scp or rsync) it over to the other PC, add it and vagrant up ;-)

For detailed steps, check this out => Is there any way to clone a vagrant box that is already installed

Try the following:

LD_LIBRARY_PATH=/usr/local/lib /usr/local/bin/python

Replace /usr/local/lib with the folder where you have installed libpython2.7.so.1.0 if it is not in /usr/local/lib.

If this works and you want to make the changes permanent, you have two options:

1. Add export LD_LIBRARY_PATH=/usr/local/lib to your .profile in your home directory (this works only if you are using a shell which loads this file when a new shell instance is started). This setting will affect your user only.

2. Add /usr/local/lib to /etc/ld.so.conf and run ldconfig. This is a system-wide setting of course.

this works only if WebResponse is a HttpWebResponse.

try
{
    ...
}
catch (System.Net.WebException exc)
{
    var webResponse = exc.Response as System.Net.HttpWebResponse;
    if (webResponse != null && 
        webResponse.StatusCode == System.Net.HttpStatusCode.Unauthorized)
    {
        MessageBox.Show("401");
    }
    else
        throw;
}

In 9.4.4 using the #>> operator works for me:

select to_json('test'::text) #>> '{}';

To use with a table column:

select jsoncol #>> '{}' from mytable;

I was able to do it using DNS service under VS2013 with the following code:

#include <Windns.h>

WSADATA wsa_Data;

int wsa_ReturnCode = WSAStartup(0x101, &wsa_Data);

gethostname(hostName, 256);
PDNS_RECORD pDnsRecord;

DNS_STATUS statsus = DnsQuery(hostName, DNS_TYPE_A, DNS_QUERY_STANDARD, NULL, &pDnsRecord, NULL);
IN_ADDR ipaddr;
ipaddr.S_un.S_addr = (pDnsRecord->Data.A.IpAddress);
printf("The IP address of the host %s is %s \n", hostName, inet_ntoa(ipaddr));

DnsRecordListFree(&pDnsRecord, DnsFreeRecordList);

I had to add Dnsapi.lib as addictional dependency in linker option.

Reference here.

To make things efficient, you need to do declare that one of the columns to be a primary key:

ALTER TABLE #mytable
ADD PRIMARY KEY(KeyColumn)

That won't take a variable for the column name.

Trust me, you are MUCH better off doing a: CREATE #myTable TABLE (or possibly a DECLARE TABLE @myTable) , which allows you to set IDENTITY and PRIMARY KEY directly.

You can just return a Boolean like this:

import org.springframework.data.jpa.repository.Query;
import org.springframework.data.jpa.repository.QueryHints;
import org.springframework.data.repository.query.Param;

@QueryHints(@QueryHint(name = org.hibernate.jpa.QueryHints.HINT_FETCH_SIZE, value = "1"))
@Query(value = "SELECT (1=1) FROM MyEntity WHERE ...... :id ....")
Boolean existsIfBlaBla(@Param("id") String id);

Boolean.TRUE.equals(existsIfBlaBla("0815")) could be a solution

Easy way to achieve this in angular 2 or 4 (Assuming that you are using bootstrap 4)

Component.html

<button type="button" (click)="openModel()">Open Modal</button>_x000D_
_x000D_
<div #myModel class="modal fade">_x000D_
  <div class="modal-dialog">_x000D_
    <div class="modal-content">_x000D_
     <div class="modal-header">_x000D_
        <h5 class="modal-title ">Title</h5>_x000D_
        <button type="button" class="close" (click)="closeModel()">_x000D_
            <span aria-hidden="true">&times;</span>_x000D_
        </button>_x000D_
      </div>_x000D_
      <div class="modal-body">_x000D_
        <p>Some text in the modal.</p>_x000D_
      </div>_x000D_
    </div>_x000D_
  </div>_x000D_
</div>

Component.ts

import {Component, OnInit, ViewChild} from '@angular/core';

@ViewChild('myModal') myModal;

openModel() {
  this.myModal.nativeElement.className = 'modal fade show';
}
closeModel() {
   this.myModal.nativeElement.className = 'modal hide';
}

You can simply use this at the end..

echo $this->db->last_query();

see http://api.jquery.com/prev/

var link = $("#me").parent("div").prev("h3").find("b");
alert(link.text());

see http://jsfiddle.net/gBwLq/

Expanding on Donut's answer and the other answers here, you can get even better results by using a generator comprehension instead of a list comprehension, and by using a set data structure (since the in operator is O(n) on a list but O(1) on a set).

So here's a function that would work for you:

def filter_list(full_list, excludes):
    s = set(excludes)
    return (x for x in full_list if x not in s)

The result will be an iterable that will lazily fetch the filtered list. If you need a real list object (e.g. if you need to do a len() on the result), then you can easily build a list like so:

filtered_list = list(filter_list(full_list, excludes))

There's my method to multiple upload file:

Nodejs :

router.post('/upload', function(req , res) {

var multiparty = require('multiparty');
var form = new multiparty.Form();
var fs = require('fs');

form.parse(req, function(err, fields, files) {  
    var imgArray = files.imatges;


    for (var i = 0; i < imgArray.length; i++) {
        var newPath = './public/uploads/'+fields.imgName+'/';
        var singleImg = imgArray[i];
        newPath+= singleImg.originalFilename;
        readAndWriteFile(singleImg, newPath);           
    }
    res.send("File uploaded to: " + newPath);

});

function readAndWriteFile(singleImg, newPath) {

        fs.readFile(singleImg.path , function(err,data) {
            fs.writeFile(newPath,data, function(err) {
                if (err) console.log('ERRRRRR!! :'+err);
                console.log('Fitxer: '+singleImg.originalFilename +' - '+ newPath);
            })
        })
}
})

Make sure your form has enctype="multipart/form-data"

I hope this gives you a hand ;)

All those mistakes are related to badly connected Apache and JDK.

1. go to start>System>Advanced_system_settings>
2. System Properties will pop-up go to Environment Variables
3. in User variables you have to set variable: JAVA_HOME value: C:\Program_Files\Java\jdk1.8.0_161
4. in System variables you need to put in the path: jdk/bin path & jre/bin path and also you need to have JAVA_HOME C:\Program_Files\Java\jdk1.8.0_161

people usually forget to setup JAVA_HOME in System variables.

if you still have an error try to think step by step

1. Open Event viewer>Check Administrative Events and Windows Logs>System see the error. If that doesn't help
2. go to C:\Program Files\Apache Software Foundation\Tomcat 7.0\logs commons-daemon.XXXX-XX-XX.log and READ THE ERRORS AND WARNINGS... there should be nicely put down in words what's the problem.

Well, there are plenty of database tutorials online for java (what you're looking for is called JDBC). But if you are using plain servlets, you will have a class that extends HttpServlet and inside it you will have two methods that look like

public void doPost(HttpServletRequest req, HttpServletResponse resp){

}

and

public void doGet(HttpServletRequest req, HttpServletResponse resp){

}

One of them is called to handle GET operations and another is used to handle POST operations. You will then use the HttpServletRequest object to get the parameters that were passed as part of the form like so:

String name = req.getParameter("name");

Then, once you have the data from the form, it's relatively easy to add it to a database using a JDBC tutorial that is widely available on the web. I also suggest searching for a basic Java servlet tutorial to get you started. It's very easy, although there are a number of steps that need to be configured correctly.

To switch to root so that all subsequent commands are executed with high privileges instead of using sudo before each command use following command and then provide the password when prompted.

sudo -i

User will change and remain root until you close the terminal. Execute exit commmand which will change the user back to original user without closing terminal.

Please Try, if use "extends AppCompatActivity" and present actionbar.

 ActionBar eksinbar=getSupportActionBar();
if (eksinbar != null) {
    eksinbar.setDisplayHomeAsUpEnabled(true);
    eksinbar.setHomeAsUpIndicator(R.mipmap.imagexxx);
}

Whenever you are in the following situation:

a = []
for i in range(5):
    a.append(i)

and you want something similar in numpy, several previous answers have pointed out ways to do it, but as @katrielalex pointed out these methods are not efficient. The efficient way to do this is to build a long list and then reshape it the way you want after you have a long list. For example, let's say I am reading some lines from a file and each row has a list of numbers and I want to build a numpy array of shape (number of lines read, length of vector in each row). Here is how I would do it more efficiently:

long_list = []
counter = 0
with open('filename', 'r') as f:
    for row in f:
        row_list = row.split()
        long_list.extend(row_list)
        counter++
#  now we have a long list and we are ready to reshape
result = np.array(long_list).reshape(counter, len(row_list)) #  desired numpy array

I ran into this trying to integrate React Native into an existing swift project using cocoapods. The FB docs (at time of writing) did not specify that npm install react-native wouldn't work without first having a package.json file. Per the RN docs set your entry point: (index.js) as index.ios.js

Look into using the ToString() method with a specified format.

Unlike constructors, where throwing exceptions can be a useful way to indicate that object creation succeeded, exceptions should not be thrown in destructors.

The problem occurs when an exception is thrown from a destructor during the stack unwinding process. If that happens, the compiler is put in a situation where it doesn’t know whether to continue the stack unwinding process or handle the new exception. The end result is that your program will be terminated immediately.

Consequently, the best course of action is just to abstain from using exceptions in destructors altogether. Write a message to a log file instead.

package com.example.ankitrajpoot.myapplication;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.ProgressBar;


public class MainActivity extends Activity {

    private ProgressBar spinner;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        spinner=(ProgressBar)findViewById(R.id.progressBar);
        spinner.setVisibility(View.VISIBLE);
    }
}

xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/loadingPanel"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center">

<ProgressBar
    android:id="@+id/progressBar"

    android:layout_width="48dp"
    style="?android:attr/progressBarStyleLarge"
    android:layout_height="48dp"
    android:indeterminateDrawable="@drawable/circular_progress_bar"
    android:indeterminate="true" />
</RelativeLayout>





<?xml version="1.0" encoding="utf-8"?>
<rotate
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:pivotX="50%"
    android:pivotY="50%"
    android:fromDegrees="0"
    android:toDegrees="1080">
    <shape
        android:shape="ring"
        android:innerRadiusRatio="3"
        android:thicknessRatio="8"
        android:useLevel="false">

        <size
            android:width="56dip"
            android:height="56dip" />

        <gradient
            android:type="sweep"
            android:useLevel="false"
            android:startColor="@android:color/transparent"
            android:endColor="#1e9dff"
            android:angle="0"
            />

    </shape>
</rotate>

Following two flags worked for me. They will clear all the previous activities and start a new one

  Intent intent = new Intent(getApplicationContext(), MyDetails.class);
  intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
  intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
  startActivity(intent);

Hope this helps.

Flexbox? You can use flexbox.

.box {_x000D_
  display: -ms-flexbox;_x000D_
  display: -webkit-flex;_x000D_
  display: flex;_x000D_
  _x000D_
  -webkit-justify-content: center;_x000D_
  justify-content: center;_x000D_
_x000D_
}_x000D_
_x000D_
.box div {_x000D_
  border:1px solid grey;_x000D_
  flex: 0 1 auto;_x000D_
  align-self: auto;_x000D_
  background: grey;_x000D_
}

<div class="box">_x000D_
  <div class="A">I'm horizontally centered.</div>_x000D_
</div>

Yes. Empty or incomplete headers or response body typically caused by broken connections or server side crash can cause 502 errors if accessed via a gateway or proxy.

For more information about the network errors

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

My solution without js and without images is this:

*HTML:

<input type=Submit class=continue_shopping_2 
name=Register title="Confirm Your Data!" 
value="confirm your data">

*CSS:

.continue_shopping_2:hover{
background-color:#FF9933;
text-decoration:none;
color:#FFFFFF;}


.continue_shopping_2{
padding:0 0 3px 0;
cursor:pointer;
background-color:#EC5500;
display:block;
text-align:center;
margin-top:8px;
width:174px;
height:21px;
border-radius:5px;
border-width:1px;
border-style:solid;
border-color:#919191;
font-family:Verdana;
font-size:13px;
font-style:normal;
line-height:normal;
font-weight:bold;
color:#FFFFFF;}

One-liner in java 8 syntax:

pdfTestDir.listFiles((dir, name) -> name.toLowerCase().endsWith(".txt"));

That's right. If you create a shelf, other people doing a get latest won't see your code.

It puts your code changes onto the server, which is probably better backed up than your work PC.

It enables you to pick up your changes on another machine, should you feel the urge to work from home.

Others can see your shelves (though I think this may be optional) so they can review your code prior to a check-in.

Because it makes these things so easy, you could consider using a JavaScript library like jQuery to do this:

<script>
    $(document).ready(function() {
        $('img.thumbnail').click(function() {
            window.location.href = this.id + '.html';
        });
    });
</script>

Basically, it attaches an onClick event to all images with class thumbnail to redirect to the corresponding HTML page (id + .html). Then you only need the images in your HTML (without the a elements), like this:

<img src="bottle.jpg" alt="bottle" class="thumbnail" id="bottle" />
<img src="glass.jpg" alt="glass" class="thumbnail" id="glass" />

This should do what you want:

import datetime
yesterday = datetime.datetime.now() - datetime.timedelta(days = 1)
print yesterday.strftime("%m%d%y")

You can try:

select(data, matches("search_string"))

It is more general than contains - you can use regex (e.g. "one_string|or_the_other").

For more examples, see: http://rpackages.ianhowson.com/cran/dplyr/man/select.html.

The problem is your angular material version, I have the same, and I have resolved this when I have installed the good version of angular material in local.

Hope it solve yours too.

My preferred solution to remove <ul> indentation is a simple CSS one-liner:

ul { padding-left: 1.2em; }

<p>A leading line of paragraph text</p>_x000D_
<ul>_x000D_
    <li>Bullet points align with paragraph text above.</li>_x000D_
    <li>Long list items wrap around correctly. Long list items wrap around correctly. Long list items wrap around correctly. Long list items wrap around correctly. Long list items wrap around correctly. </li>_x000D_
    <li>List item 3</li>_x000D_
</ul>_x000D_
<p>A trailing line of paragraph text</p>

This solution is not only lightweight, but has multiple advantages:

• It nicely left-aligns <ul>'s bullet points to surrounding normal paragraph text (= indenting of <ul> removed).
• The text blocks within the <li> elements remain correctly indented if they wrap around into multiple lines.

Legacy info:
For IE versions 8 and below you must use margin-left instead:

    ul { margin-left: 1.2em; }

For Linux the correct command is:

gcc -o term term.c -lpthread

1. you have to put -lpthread just after the compile command,this command will tell to the compiler to execute program with pthread.h library.
2. gcc -l links with a library file.Link -l with library name without the lib prefix.

The other answers cover the most common scenario: watch the content of the frames (Developer Tools -> Network tab -> Right click on the websocket connection -> frames).

If you want to know some more informations, like which sockets are currently open/idle or be able to close them you'll find this url useful

chrome://net-internals/#sockets

SELECT count(word) as count 
FROM words 
GROUP BY word
HAVING count >= 2;

select distinct title, (
               select count(title) 
               from kmovies as sub 
               where sub.title=kmovies.title) as cnt 
from kmovies 
group by title 
order by cnt desc

UPDATE: As mentioned by Richard Grimes in my cited post, @Iain and @Dmitry Lobanov, my answer is right in theory but wrong in practice.

As I should have remembered from countless books, etc., while one sets these properties using the [assembly: XXXAttribute], they get highjacked by the compiler and placed into the VERSIONINFO resource.

For the above reason, you need to use the approach in @Xiaofu's answer as the attributes are stripped after the signal has been extracted from them.

public static string GetProductVersion()
{
  var attribute = (AssemblyVersionAttribute)Assembly
    .GetExecutingAssembly()
    .GetCustomAttributes( typeof(AssemblyVersionAttribute), true )
    .Single();
   return attribute.InformationalVersion;
}

(From http://bytes.com/groups/net/420417-assemblyversionattribute - as noted there, if you're looking for a different attribute, substitute that into the above)

both are the same, but array_push makes a loop in it's parameter which is an array and perform $array[]=$element

Directory pull is available on new android tools. ( I don't know from which version it was added, but its working on latest ADT 21.1 )

adb pull /sdcard/Robotium-Screenshots
pull: building file list...
pull: /sdcard/Robotium-Screenshots/090313-110415.jpg -> ./090313-110415.jpg
pull: /sdcard/Robotium-Screenshots/090313-110412.jpg -> ./090313-110412.jpg
pull: /sdcard/Robotium-Screenshots/090313-110408.jpg -> ./090313-110408.jpg
pull: /sdcard/Robotium-Screenshots/090313-110406.jpg -> ./090313-110406.jpg
pull: /sdcard/Robotium-Screenshots/090313-110404.jpg -> ./090313-110404.jpg
5 files pulled. 0 files skipped.
61 KB/s (338736 bytes in 5.409s)

On some apps you need to remove the slashes to make it work.

/(.)\1{9,}/

or this:

(.)\1{9,}

You may interest in using php's inbuilt function realpath(). and passing a constant DIR

for example: $TargetDirectory = realpath(__DIR__."/../.."); //Will take you 2 folder's back

String realpath() :: Returns canonicalized absolute pathname ..

If you try this:

#include<stdio.h>

void main()
{
 char name[]="siva";
 printf("name = %p\n", name);
 printf("&name[0] = %p\n", &name[0]);
 printf("name printed as %%s is %s\n",name);
 printf("*name = %c\n",*name);
 printf("name[0] = %c\n", name[0]);
}

Output is:

name = 0xbff5391b  
&name[0] = 0xbff5391b
name printed as %s is siva
*name = s
name[0] = s

So 'name' is actually a pointer to the array of characters in memory. If you try reading the first four bytes at 0xbff5391b, you will see 's', 'i', 'v' and 'a'

Location     Data
=========   ======

0xbff5391b    0x73  's'  ---> name[0]
0xbff5391c    0x69  'i'  ---> name[1]
0xbff5391d    0x76  'v'  ---> name[2]
0xbff5391e    0x61  'a'  ---> name[3]
0xbff5391f    0x00  '\0' ---> This is the NULL termination of the string

To print a character you need to pass the value of the character to printf. The value can be referenced as name[0] or *name (since for an array name = &name[0]).

To print a string you need to pass a pointer to the string to printf (in this case 'name' or '&name[0]').

You just have to replace the break with a return statement.

Think of the code inside the Foreach-Object as an anonymous function. If you have loops inside the function, just use the control keywords applying to the construction (continue, break, ...).

One trick that makes position:absolute more palatable to me is to make its parent position:relative. Then the child will be 'absolute' relative to the position of the parent.

jsFiddle

In addition to existing answers it is often desired to format the REST output (typically JSON and XML lacks indentation). Try this:

$ curl https://api.twitter.com/1/help/configuration.xml  | xmllint --format -
$ curl https://api.twitter.com/1/help/configuration.json | python -mjson.tool

Tested on Ubuntu 11.0.4/11.10.

Another issue is the desired content type. Twitter uses .xml/.json extension, but more idiomatic REST would require Accept header:

$ curl -H "Accept: application/json"

You should definitely check out the MSDN on what Outlook will support in regards to css and html. The link is here: http://msdn.microsoft.com/en-us/library/aa338201(v=office.12).aspx. If you do not have at least office 2007 you really need to upgrade as there are major differences between 2007 and previous editions. Also try saving the resulting email to file and examine it with firefox you will see what is being changed by outlook and possibly have a more specific question to ask. You can use Word to view the email as a sort of preview as well (but you won't get info on what styles are/are not being applied.

if you want to concatenate the string representation of the values of two variables, use the + sign :

var var1 = 1;
var var2 = "bob";
var var3 = var2 + var1;//=bob1

But if you want to keep the two in only one variable, but still be able to access them later, you could make an object container:

function Container(){
   this.variables = [];
}
Container.prototype.addVar = function(var){
   this.variables.push(var);
}
Container.prototype.toString = function(){
   var result = '';
   for(var i in this.variables)
       result += this.variables[i];
   return result;
}

var var1 = 1;
var var2 = "bob";
var container = new Container();
container.addVar(var2);
container.addVar(var1);
container.toString();// = bob1

the advantage is that you can get the string representation of the two variables, bit you can modify them later :

container.variables[0] = 3;
container.variables[1] = "tom";
container.toString();// = tom3

Assuming that "a" and "b" are bean properties

rendered="#{bean.a==12 and (bean.b==13 or bean.b==15)}"

You may look at JSF EL operators

How about without recreating a new list, you can do by indexing:

>>> foo = ['1a','2b','3c','4d']
>>> for i in range(len(foo)):
...     print foo[-(i+1)]
...
4d
3c
2b
1a
>>>

OR

>>> length = len(foo)
>>> for i in range(length):
...     print foo[length-i-1]
...
4d
3c
2b
1a
>>>

Your code makes no sense, maybe because it's out of context.

If you mean code like this:

$('a').click(function () {
    callFunction();
    return false;
});

The return false will return false to the click-event. That tells the browser to stop following events, like follow a link. It has nothing to do with the previous function call. Javascript runs from top to bottom more or less, so a line cannot affect a previous line.

You can use this npm package. It handles everything and has options for static and dynamic classes based on a variable or a function.

// Support for string arguments
getClassNames('class1', 'class2');

// support for Object
getClassNames({class1: true, class2 : false});

// support for all type of data
getClassNames('class1', 'class2', ['class3', 'class4'], { 
    class5 : function() { return false; },
    class6 : function() { return true; }
});

<div className={getClassNames({class1: true, class2 : false})} />

1. See information about the SQL server

tsql -LH SERVER_IP_ADDRESS

locale is "C"
locale charset is "646"
ServerName TITAN
InstanceName MSSQLSERVER
IsClustered No
Version 8.00.194
tcp 1433
np \\TITAN\pipe\sql\query

2. Set your freetds.conf

tsql -C    
freetds.conf directory: /usr/local/etc

[TITAN]
host = SERVER_IP_ADDRESS
port = 1433
tds version = 7.2

3 Try

tsql -S TITAN -U user -P password

OR

 'dsn' => 'dblib:host=TITAN:1433;dbname=YOURDBNAME',

See also http://www.freetds.org/userguide/confirminstall.htm (Example 3-5.)

If you get message 20009, remember you haven't connected to the machine. It's a configuration or network issue, not a protocol failure. Verify the server is up, has the name and IP address FreeTDS is using, and is listening to the configured port.

Include the jQuery file first:

 <script src="http://ajax.googleapis.com/ajax/libs/jquery/2.0.0/jquery.min.js"></script>
 <script type="text/javascript" src="./javascript.js"></script>
    <script
        src="http://maps.googleapis.com/maps/api/js?key=AIzaSyCJnj2nWoM86eU8Bq2G4lSNz3udIkZT4YY&sensor=false">
    </script>

The way to output > character is to prepend it with ^ escape character:

echo ^>

will print simply

>

to sample integers without replacement between minval and maxval:

import numpy as np

minval, maxval, n_samples = -50, 50, 10
generator = np.random.default_rng(seed=0)
samples = generator.permutation(np.arange(minval, maxval))[:n_samples]

# or, if minval is 0,
samples = generator.permutation(maxval)[:n_samples]

with jax:

import jax

minval, maxval, n_samples = -50, 50, 10
key = jax.random.PRNGKey(seed=0)
samples = jax.random.shuffle(key, jax.numpy.arange(minval, maxval))[:n_samples]

i came across the same thing and i figured out what is the issue. When we use the method input, the response we should type should be in double quotes. Like in your line date=input("Example: March 21 | What is the date? ")

You should type when prompted on console "12/12/2015" - note the " thing before and after. This way it will take that as a string and process it as expected. I am not sure if this is limitation of this input method - but it works this way.

Hope it helps

If we don't provide any scope then the default scope is compile, If you want to confirm, simply go to Effective pom tab in eclipse editor, it will show you as compile.

DEBUG/_DEBUG should be defined in VS already.

Remove the #define DEBUG in your code. Set preprocessors in the build configuration for that specific build.

The reason it prints "Mode=Debug" is because of your #define and then skips the elif.

The right way to check is:

#if DEBUG
    Console.WriteLine("Mode=Debug"); 
#else
    Console.WriteLine("Mode=Release"); 
#endif

Don't check for RELEASE.

Since Java9, both interfaces are deprecated, meaning you should not use them anymore. See Observer is deprecated in Java 9. What should we use instead of it?

However, you might still get interview questions about them...

Some of the answers here suggest using setTimeout to delay the process of focusing on the target element. One of them mentions that the target is inside a modal dialog. I cannot comment further on the correctness of the setTimeoutsolution without knowing the specific details of where it was used. However, I thought I should provide an answer here to help out people who run into this thread just as I did

The simple fact of the matter is that you cannot focus on an element which is not yet visible. If you run into this problem ensure that the target is actually visible when the attempt to focus it is made. In my own case I was doing something along these lines

$('#elementid').animate({left:0,duration:'slow'});
$('#elementid').focus();

This did not work. I only realized what was going on when I executed $('#elementid').focus()` from the console which did work. The difference - in my code above the target there is no certainty that the target will infact be visible since the animation may not be complete. And there lies the clue

$('#elementid').animate({left:0,duration:'slow',complete:focusFunction});

function focusFunction(){$('#elementid').focus();}

works just as expected. I too had initially put in a setTimeout solution and it worked too. However, an arbitrarily chosen timeout is bound to break the solution sooner or later depending on how slowly the host device goes about the process of ensuring that the target element is visible.

Two important CSS properties to set for full height pages are these:

1. Allow the body to grow as high as the content in it requires.

   html { height: 100%; }
   

2. Force the body not to get any smaller than then window height.

   body { min-height: 100%; }
   

What you do with your gird is irrelevant as long as you use fractions or percentages you should be safe in all cases.

Have a look at this common dashboard layout.

Main page

<a href="/sample.htm#page1">page1</a>
<a href="/sample.htm#page2">page2</a>

sample pages

<div id='page1'><a name="page1"></a></div>
<div id='page2'><a name="page2"></a></div>

I was setting the bearer token

httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", token);

It was working in one endpoint, but not another. The issue was that I had lower case b on "bearer". After change now it works for both api's I'm hitting. Such an easy thing to miss if you aren't even considering it as one of the haystacks to look in for the needle.

Make sure to have "Bearer" - with capital.

// Setup
var myArray = [["John", 23], ["cat", 2]];

// Only change code below this line
var removedFromMyArray;
removedFromMyArray = myArray.pop()

After a few hours of messing around I eventually got something that works, partially answered in a similar issue here: How do I include a JavaScript file in another JavaScript file?

BUT there was an import that was screwing the rest of it up:

Use require in .vue files

<script>
  var mylib = require('./mylib');
  export default {
  ....

Exports in mylib

 exports.myfunc = () => {....}

Avoid import

The actual issue in my case (which I didn't think was relevant!) was that mylib.js was itself using other dependencies. The resulting error seems to have nothing to do with this, and there was no transpiling error from webpack but anyway I had:

import models from './model/models'
import axios from 'axios'

This works so long as I'm not using mylib in a .vue component. However as soon as I use mylib there, the error described in this issue arises.

I changed to:

let models = require('./model/models');
let axios = require('axios');

And all works as expected.

As a quick workaround I just saved the workbook as an Excel 97-2003 .xls file. I was able to import with that format with no error.

Firstly, use these settings for Google:

$mail->IsSMTP();
$mail->Host = "smtp.gmail.com";
$mail->SMTPAuth = true;
$mail->SMTPSecure = "tls"; //edited from tsl
$mail->Username = "myEmail";
$mail->Password = "myPassword";
$mail->Port = "587";

But also, what firewall have you got set up?

If you're filtering out TCP ports 465/995, and maybe 587, you'll need to configure some exceptions or take them off your rules list.

https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting

You can't - a set is unordered, so there's no index provided. You'll have to declare an int, as you say. Just remember that the next time you call keySet() you won't necessarily get the results in the same order.

Easy to use following (no need use CONCAT or ||):

@Query("from Service s where s.category.typeAsString like :parent%")
List<Service> findAll(@Param("parent") String parent);

Documented in: http://docs.spring.io/spring-data/jpa/docs/current/reference/html.

$result = ['5' => 'cherry', '7' => 'apple'];
array_multisort($result, SORT_ASC);
print_r($result);

Array ( [0] => apple [1] => cherry )

//...
array_multisort($result, SORT_DESC);
//...

Array ( [0] => cherry [1] => apple )

There's an even simpler solution - delete the cache folder at user/.android/built-cache and go back to android studio and sync with gradle again, if that still doesn't work delete the cache folder again, and restart android studio and re-import the project

Changing the data frames list into a list of tuples.

df = pd.DataFrame({'col1': [1, 2, 3], 'col2': [4, 5, 6]})
print(df)
OUTPUT
   col1  col2
0     1     4
1     2     5
2     3     6

records = df.to_records(index=False)
result = list(records)
print(result)
OUTPUT
[(1, 4), (2, 5), (3, 6)]

int[] array = new int[10] { 13, 2, 5, 8, 23, 90, 41, 4, 77, 61 };

for (int i = 10; i > 0; i--)
{
    for (int j = 0; j < 9; j++)
    {
        if (array[j] > array[j + 1])
        {
            int temp = array[j];
            array[j] = array[j + 1];
            array[j + 1] = temp;
        }
    }
}

   @RequestMapping("/op")
   public ModelAndView method(Map<String, Object> model) {
       model.put("att", "helloooo");
       return new ModelAndView("dom/op");
   }

In your .js

<script>
    var valVar = [[${att}]];
</script>

Found a solution to Excel Mac2016 as having to paste the code into the relevant cell, enter, then go to the end of the formula within the header bar and enter the following:

Enter a formula as an array formula Image + SHIFT + RETURN or CONTROL + SHIFT + RETURN

1. Response to the main question

The script $(window).height() does work well (showing the viewport's height and not the document with scrolling height), BUT it needs that you put correctly the doctype tag in your document, for example these doctypes:

For HTML 5:

<!DOCTYPE html>

For transitional HTML4:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

Probably the default doctype assumed by some browsers is such, that $(window).height() takes the document's height and not the browser's height. With the doctype specification, it's satisfactorily solved, and I'm pretty sure you peps will avoid the "changing scroll-overflow to hidden and then back", which is, I'm sorry, a bit dirty trick, specially if you don't document it on the code for future programmer's usage.

2. An ADDITIONAL tip, note aside: Moreover, if you are doing a script, you can invent tests to help programmers in using your libraries, let me invent a couple:

$(document).ready(function() {

      if(typeof $=='undefined') {
        alert("PROGRAMMER'S Error: you haven't called JQuery library");
      } else if (typeof $.ui=='undefined') {
        alert("PROGRAMMER'S Error: you haven't installed the UI Jquery library");
      }
      if(document.doctype==null || screen.height < parseInt($(window).height()) ) {
        alert("ERROR, check your doctype, the calculated heights are not what you might expect");
      } 

});

EDIT: about the part 2, "An ADDITIONAL tip, note aside": @Machiel, in yesterday's comment (2014-09-04), was UTTERLY right: the check of the $ can not be inside the ready event of Jquery, because we are, as he pointed out, assuming $ is already defined. THANKS FOR POINTING THAT OUT, and do please the rest of you readers correct this, if you used it in your scripts. My suggestion is: in your libraries put an "install_script()" function which initializes the library (put any reference to $ inside such init function, including the declaration of ready()) and AT THE BEGINNING of such "install_script()" function, check if the $ is defined, but make everything independent of JQuery, so your library can "diagnose itself" when JQuery is not yet defined. I prefer this method rather than forcing the automatic creation of a JQuery bringing it from a CDN. Those are tiny notes aside for helping out other programmers. I think that people who make libraries must be richer in the feedback to potential programmer's mistakes. For example, Google Apis need an aside manual to understand the error messages. That's absurd, to need external documentation for some tiny mistakes that don't need you to go and search a manual or a specification. The library must be SELF-DOCUMENTED. I write code even taking care of the mistakes I might commit even six months from now, and it still tries to be a clean and not-repetitive code, already-written-to-prevent-future-developer-mistakes.

Oracle has released JDK 7 for OS X.

You can also use a text editor:

• Paste the URL in the text editor
• Copy the URL that was just pasted from the text editor
• Paste it in the command line

For me it works like this:

    options : {
      scales: {
        yAxes: [{
          scaleLabel: {
            display: true,
            labelString: 'probability'
          }
        }]
      }
    }

Here is a little help function. Great for when you have multiple languages!

private void setColor(TextView view, String fulltext, String subtext, int color) {
    view.setText(fulltext, TextView.BufferType.SPANNABLE);
    Spannable str = (Spannable) view.getText();
    int i = fulltext.indexOf(subtext);
    str.setSpan(new ForegroundColorSpan(color), i, i + subtext.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}

import matplotlib.pyplot as plt
import numpy as np

mu, sigma = 100, 15
x = mu + sigma * np.random.randn(10000)
hist, bins = np.histogram(x, bins=50)
width = 0.7 * (bins[1] - bins[0])
center = (bins[:-1] + bins[1:]) / 2
plt.bar(center, hist, align='center', width=width)
plt.show()

The object-oriented interface is also straightforward:

fig, ax = plt.subplots()
ax.bar(center, hist, align='center', width=width)
fig.savefig("1.png")

If you are using custom (non-constant) bins, you can pass compute the widths using np.diff, pass the widths to ax.bar and use ax.set_xticks to label the bin edges:

import matplotlib.pyplot as plt
import numpy as np

mu, sigma = 100, 15
x = mu + sigma * np.random.randn(10000)
bins = [0, 40, 60, 75, 90, 110, 125, 140, 160, 200]
hist, bins = np.histogram(x, bins=bins)
width = np.diff(bins)
center = (bins[:-1] + bins[1:]) / 2

fig, ax = plt.subplots(figsize=(8,3))
ax.bar(center, hist, align='center', width=width)
ax.set_xticks(bins)
fig.savefig("/tmp/out.png")

plt.show()

In command prompt go to the main directory you want the list for ... and type the command tree /f

Try using String.Split Method:

string text = @"First line
second line
third line";

foreach (string line in text.Split('\n'))
{
    // do something
}

• You can access global keywords without keyword global
• To be able to modify them you need to explicitly state that the keyword is global. Otherwise, the keyword will be declared in local scope.

Example:

words = [...] 

def contains (word): 
    global words             # <- not really needed
    return (word in words) 

def add (word): 
    global words             # must specify that we're working with a global keyword
    if word not in words: 
        words += [word]

With regards to the poor performance there are any number of things it could be, and it really ought to be a separate question. However, there is one obvious thing that could be a problem:

WHERE TO_CHAR(HISTORY_DATE, 'DD.MM.YYYY') = '06.02.2009') 

If HISTORY_DATE really is a date column and if it has an index then this rewrite will perform better:

WHERE HISTORY_DATE = TO_DATE ('06.02.2009', 'DD.MM.YYYY')  

This is because a datatype conversion disables the use of a B-Tree index.

If by "restart", you mean to start a new 4 second interval at this moment, then you must stop and restart the timer.

function myFn() {console.log('idle');}

var myTimer = setInterval(myFn, 4000);

// Then, later at some future time, 
// to restart a new 4 second interval starting at this exact moment in time
clearInterval(myTimer);
myTimer = setInterval(myFn, 4000);

You could also use a little timer object that offers a reset feature:

function Timer(fn, t) {
    var timerObj = setInterval(fn, t);

    this.stop = function() {
        if (timerObj) {
            clearInterval(timerObj);
            timerObj = null;
        }
        return this;
    }

    // start timer using current settings (if it's not already running)
    this.start = function() {
        if (!timerObj) {
            this.stop();
            timerObj = setInterval(fn, t);
        }
        return this;
    }

    // start with new or original interval, stop current interval
    this.reset = function(newT = t) {
        t = newT;
        return this.stop().start();
    }
}

Usage:

var timer = new Timer(function() {
    // your function here
}, 5000);


// switch interval to 10 seconds
timer.reset(10000);

// stop the timer
timer.stop();

// start the timer
timer.start();

Working demo: https://jsfiddle.net/jfriend00/t17vz506/

You can do this using reprex.

As mt1022 noted, "... good package for producing minimal, reproducible example is "reprex" from tidyverse".

According to Tidyverse:

The goal of "reprex" is to package your problematic code in such a way that other people can run it and feel your pain.

An example is given on tidyverse web site.

library(reprex)
y <- 1:4
mean(y)
reprex() 

I think this is the simplest way to create a reproducible example.

It took me a while to figure out this because the normal "make install" has been removed and I don't use cmake. Here is my experience to share. At work, I don't have root access on Linux, so I installed the Google test framework under my home directory: ~/usr/gtest/.

To install the package in ~/usr/gtest/ as shared libraries, together with sample build as well:

$ mkdir ~/temp
$ cd ~/temp
$ unzip gtest-1.7.0.zip 
$ cd gtest-1.7.0
$ mkdir mybuild
$ cd mybuild
$ cmake -DBUILD_SHARED_LIBS=ON -Dgtest_build_samples=ON -G"Unix Makefiles" ..
$ make
$ cp -r ../include/gtest ~/usr/gtest/include/
$ cp lib*.so ~/usr/gtest/lib

To validate the installation, use the following test.c as a simple test example:

    #include <gtest/gtest.h>
    TEST(MathTest, TwoPlusTwoEqualsFour) {
        EXPECT_EQ(2 + 2, 4);
    }

    int main(int argc, char **argv) {
        ::testing::InitGoogleTest( &argc, argv );
        return RUN_ALL_TESTS();
    }

To compile:

    $ export GTEST_HOME=~/usr/gtest
    $ export LD_LIBRARY_PATH=$GTEST_HOME/lib:$LD_LIBRARY_PATH
    $ g++ -I $GTEST_HOME/include -L $GTEST_HOME/lib -lgtest -lgtest_main -lpthread test.cpp 

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

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

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

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

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

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

main.cpp

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

size_t niters;

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

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

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

GitHub upstream.

Compile, run and disassemble:

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

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

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

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

expect 400000
global 100000

and deterministic "right" output of the others:

expect 400000
global 400000

Disassembly of main_fail.out:

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

Disassembly of main_std_atomic.out:

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

Disassembly of main_lock.out:

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

Conclusions:

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

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

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

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

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

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

I use a utility that I wrote in C called autotab. It analyzes the first few thousand lines of a file which you load and determines values for the Vim parameters shiftwidth, tabstop and expandtab.

This is compiled using, for instance, gcc -O autotab.c -o autotab. Instructions for integrating with Vim are in the comment header at the top.

Autotab is fairly clever, but can get confused from time to time, in particular by that have been inconsistently maintained using different indentation styles.

If a file evidently uses tabs, or a combination of tabs and spaces, for indentation, Autotab will figure out what tab size is being used by considering factors like alignment of internal elements across successive lines, such as comments.

It works for a variety of programming languages, and is forgiving for "out of band" elements which do not obey indentation increments, such as C preprocessing directives, C statement labels, not to mention the obvious blank lines.

To concatenate multiple pyspark dataframes into one:

from functools import reduce

reduce(lambda x,y:x.union(y), [df_1,df_2])

And you can replace the list of [df_1, df_2] to a list of any length.

Are you running this on Windows or Linux? If you're on Windows,then you should be use a path like C:\\Users\\apple\\Downloads\train.csv . If you're on Linux, then you can follow the same path.

setDatabasePath() method was deprecated in API level 19. I advise you to use storage locale like this:

webView.getSettings().setDomStorageEnabled(true);
webView.getSettings().setDatabaseEnabled(true);
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {
    webView.getSettings().setDatabasePath("/data/data/" + webView.getContext().getPackageName() + "/databases/");
}

I had a simular need. Here is what I did:

  <script type="text/javascript" language="javascript">
    function convertEnterToTab() {
      if(event.keyCode==13) {
        event.keyCode = 9;
      }
    }
    document.onkeydown = convertEnterToTab;    
  </script>  

I depends on the version and the distro.

For example the default download pre-2.2 from the MongoDB site uses: /data/db but the Ubuntu install at one point used to use: var/lib/mongodb.

I think these have been standardised now so that 2.2+ will only use data/db whether it comes from direct download on the site or from the repos.

dex file is a file that is executed on the Dalvik VM.

Dalvik VM includes several features for performance optimization, verification, and monitoring, one of which is Dalvik Executable (DEX).

Java source code is compiled by the Java compiler into .class files. Then the dx (dexer) tool, part of the Android SDK processes the .class files into a file format called DEX that contains Dalvik byte code. The dx tool eliminates all the redundant information that is present in the classes. In DEX all the classes of the application are packed into one file. The following table provides comparison between code sizes for JVM jar files and the files processed by the dex tool.

The table compares code sizes for system libraries, web browser applications, and a general purpose application (alarm clock app). In all cases dex tool reduced size of the code by more than 50%.

In standard Java environments each class in Java code results in one .class file. That means, if the Java source code file has one public class and two anonymous classes, let’s say for event handling, then the java compiler will create total three .class files.

The compilation step is same on the Android platform, thus resulting in multiple .class files. But after .class files are generated, the “dx” tool is used to convert all .class files into a single .dex, or Dalvik Executable, file. It is the .dex file that is executed on the Dalvik VM. The .dex file has been optimized for memory usage and the design is primarily driven by sharing of data.

No, you will need scripting to place a click Event handler on the Element that does what you want.

• https://developer.mozilla.org/en/DOM/Event
• https://developer.mozilla.org/En/Listening_to_events

The only thing I would add to Mark Peters solution is that you don't need to iterate over the ArrayList - you should be able to use the addAll(Collection) method on the Set. You only need to iterate over the entire list to do the summations.

I'm not so proud about this solution but you can have timestamp in microsecond or nanosecond in this way:

const microsecond = () => Number(Date.now() + String(process.hrtime()[1]).slice(3,6))
const nanosecond = () => Number(Date.now() + String(process.hrtime()[1]).slice(3))

// usage
microsecond() // return 1586878008997591
nanosecond()  // return 1586878009000645600

// Benchmark with 100 000 iterations
// Date.now: 7.758ms
// microsecond: 33.382ms
// nanosecond: 31.252ms

Know that:

• This solution works exclusively with node.js,
• This is about 3 to 10 times slower than Date.now()
• Weirdly, it seems very accurate, hrTime seems to follow exactly js timestamp ticks.
• You can replace Date.now() by Number(new Date()) to get timestamp in milliseconds

Edit:

Here a solution to have microsecond with comma, however, the number version will be rounded natively by javascript. So if you want the same format every time, you should use the String version of it.

const microsecondWithCommaString = () => (Date.now() + '.' + String(process.hrtime()[1]).slice(3,7))
const microsecondWithComma = () => Number(Date.now() + '.' + String(process.hrtime()[1]).slice(3,7))

microsecondWithCommaString() // return "1586883629984.8997"
microsecondWithComma() // return 1586883629985.966

Any user whose login shell setting in /etc/passwd is an interactive shell can login. I don't think there's a totally reliable way to tell if a program is an interactive shell; checking whether it's in /etc/shells is probably as good as you can get.

Other users can also login, but the program they run should not allow them to get much access to the system. And users that aren't allowed to login at all should have /etc/false as their shell -- this will just log them out immediately.

I prefer this method, floats are poorly supported in older versions of IE (really?...)

.column-left{ position:absolute; left: 0px; width: 33.3%; background: red; }
.column-right{position:absolute; left:66.6%; width: 33.3%; background: green; }
.column-center{ position:absolute; left:33.3%; width: 33.3%; background: yellow; }

UPDATED : Of course, to use this technique and due to the absolute positioning you need to enclose the divs on a container and do a postprocessing to define the height of if, something like this:

jQuery(document).ready(function(){ 
    jQuery('.main').height( Math.max (
        jQuery('.column-left').height(),
        jQuery('.column??-right').height(),
        jQuery('.column-center').height())
    ); 
});

Not the most amazing thing in the world, but at least doesn't break on older IEs.

There are a lot of dangerous answers on this page. Note that since SVN version 1.6, doing an update -r can cause tree conflicts, which rapidly escalates into a potentially data losing kafkeresque nightmare where you're googling for information on tree conflicts.

The correct way to revert to a version is:

svn merge -r HEAD:12345 .

Where 12345 is the version number. Don't forget the dot.

Try Keystore Explorer http://keystore-explorer.org/

KeyStore Explorer is an open source GUI replacement for the Java command-line utilities keytool and jarsigner. It does openssl/pkcs12 as well.

You may use the SPOOL command to write the information to a file.

Before executing any command type the following:

SPOOL <output file path>

All commands output following will be written to the output file.

To stop command output writing type

SPOOL OFF

I used a very similar method to @bott, but I modified it a little bit to make there be no need to resize the image:

BufferedImage img = null;
try {
    img = ImageIO.read(new File("image.jpg"));
} catch (IOException e) {
    e.printStackTrace();
}
Image dimg = img.getScaledInstance(800, 508, Image.SCALE_SMOOTH);
ImageIcon imageIcon = new ImageIcon(dimg);
setContentPane(new JLabel(imageIcon));

Works every time. You can also get the width and height of the jFrame and use that in place of the 800 and 508 respectively.

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.

You get the cursor position by calling GetCursorPos.

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

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

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

You hide and show the cursor with ShowCursor.

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

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

Javascript is not object oriented programming(OOP) language therefore the LOOK UP process in javascript work using 'DELEGATION PROCESS' also known as prototype delegation or prototypical inheritance.

If you try to get the value of a property from an object that it doesn't have, the JavaScript engine looks to the object's prototype (and its prototype, 1 step above at a time) it's prototype chain untll the chain ends upto null which is Object.prototype == null (Standard Object Prototype). At this point if property or method is not defined than undefined is returned.

Thus with the new keyword some of the task that were manually done e.g

1. Manual Object Creation e.g newObj.
2. Hidden bond Creation using proto (aka: dunder proto) in JS spec [[prototype]] (i.e. proto)
3. referencing and assign properties to newObj
4. return of newObj object.

All is done manually.

function CreateObj(value1, value2) {
  const newObj = {};
  newObj.property1 = value1;
  newObj.property2 = value2;
  return newObj;
}
var obj = CreateObj(10,20);

obj.__proto__ === Object.prototype;              // true
Object.getPrototypeOf(obj) === Object.prototype // true

Javascript Keyword new helps to automate this process:

1. new object literal is created identified by this:{}
2. referencing and assign properties to this
3. Hidden bond Creation [[prototype]] (i.e. proto) to Function.prototype shared space.
4. implicit return of this object {}

function CreateObj(value1, value2) {
  this.property1 = value1;
  this.property2 = value2;
}

var obj = new CreateObj(10,20);
obj.__proto__ === CreateObj.prototype             // true
Object.getPrototypeOf(obj) == CreateObj.prototype // true

Calling Constructor Function without the new Keyword:

=> this: Window

function CreateObj(value1, value2) {
  var isWindowObj = this === window;
  console.log("Is Pointing to Window Object", isWindowObj);
  this.property1 = value1;
  this.property2 = value2;
}
var obj = new CreateObj(10,20); // Is Pointing to Window Object false
var obj = CreateObj(10,20); // Is Pointing to Window Object true
window.property1; // 10
window.property2; // 20

Use the special bash variable "$?" like so:

function_output=$(my_function)
function_return_value=$?