How do I set bold and italic on UILabel of iPhone/iPad?

Example Bold text:

UILabel *titleBold = [[UILabel alloc] initWithFrame:CGRectMake(10, 10, 200, 30)];
UIFont* myBoldFont = [UIFont boldSystemFontOfSize:[UIFont systemFontSize]];
[titleBold setFont:myBoldFont];

Example Italic text:

UILabel *subTitleItalic = [[UILabel alloc] initWithFrame:CGRectMake(10, 35, 200, 30)];
UIFont* myItalicFont = [UIFont italicSystemFontOfSize:[UIFont systemFontSize]];
[subTitleItalic setFont:myItalicFont];

How do you stylize a font in Swift?

Xamarin

Label.Font = UIFont.FromName("Copperplate", 10.0f);

Swift

text.font = UIFont.init(name: "Poppins-Regular", size: 14)

To get the list of font family Github/IOS-UIFont-Names

How to change font of UIButton with Swift

Dot-notation is awesome (swift 4.2)

btn.titleLabel?.font = .systemFont(ofSize: 12)

How does Java deal with multiple conditions inside a single IF statement

Is Java smart enough to skip checking bool2 and bool2 if bool1 was evaluated to false?

Its not a matter of being smart, its a requirement specified in the language. Otherwise you couldn't write expressions like.

if(s != null && s.length() > 0)

if(s == null || s.length() == 0)

BTW if you use & and | it will always evaluate both sides of the expression.

Safe width in pixels for printing web pages?

I doubt there is one... It depends on browser, on printer (physical max dpi) and its driver, on paper size as you point out (and I might want to print on B5 paper too...), on settings (landscape or portrait?), plus you often can change the scale (percentage), etc.
Let the users tweak their settings...

Best way to encode text data for XML

You can use the built-in class XAttribute, which handles the encoding automatically:

using System.Xml.Linq;

XDocument doc = new XDocument();

List<XAttribute> attributes = new List<XAttribute>();
attributes.Add(new XAttribute("key1", "val1&val11"));
attributes.Add(new XAttribute("key2", "val2"));

XElement elem = new XElement("test", attributes.ToArray());

doc.Add(elem);

string xmlStr = doc.ToString();

Convert a string to a datetime

Try to see if the following code helps you:

Dim iDate As String = "05/05/2005"
Dim oDate As DateTime = Convert.ToDateTime(iDate)

Programmatically retrieve SQL Server stored procedure source that is identical to the source returned by the SQL Server Management Studio gui?

The Databse Publishing Wizard can dump the schema (and other objects) from the command line.

How can I do width = 100% - 100px in CSS?

Padding on the outer div will get the desired effect.

<html>
<head>
<style>
    #outer{
        padding: 0 50px;
        border:1px solid black; /*for visualization*/
    }

    #inner{
        border:1px solid red; /*for visualization*/
    }
</style>
</head>
<body>
<div id="outer">
    <div id="inner">
        100px smaller than outer
    </div>
</div>
</body>
</html>

'cl' is not recognized as an internal or external command,

I had the same problem. Try to make a bat-file to start the Qt Creator. Add something like this to the bat-file:

call "C:\Program Files\Microsoft Visual Studio 9.0\VC\bin\vcvars32.bat"  
"C:\QTsdk\qtcreator\bin\qtcreator"

Now I can compile and get:

jom 1.0.8 - empower your cores
11:10:08: The process "C:\QTsdk\qtcreator\bin\jom.exe" exited normally.

Get first letter of a string from column

Cast the dtype of the col to str and you can perform vectorised slicing calling str:

In [29]:
df['new_col'] = df['First'].astype(str).str[0]
df

Out[29]:
   First  Second new_col
0    123     234       1
1     22    4353       2
2     32     355       3
3    453     453       4
4     45     345       4
5    453     453       4
6     56      56       5

if you need to you can cast the dtype back again calling astype(int) on the column

How to select first parent DIV using jQuery?

Keep it simple!

var classes = $(this).parent('div').attr('class');

How do I change a PictureBox's image?

If you have an image imported as a resource in your project there is also this:

picPreview.Image = Properties.Resources.ImageName;

Where picPreview is the name of the picture box and ImageName is the name of the file you want to display.

*Resources are located by going to: Project --> Properties --> Resources

change Oracle user account status from EXPIRE(GRACE) to OPEN

Step-1 Need to find user details by using below query

SQL> select username, account_status from dba_users where username='BOB';

USERNAME                       ACCOUNT_STATUS
------------------------------ --------------------------------
BOB                            EXPIRED

Step-2 Get users password by using below query.

SQL>SELECT 'ALTER USER '|| name ||' IDENTIFIED BY VALUES '''|| spare4 ||';'|| password ||''';' FROM sys.user$ WHERE name='BOB';

ALTER USER BOB IDENTIFIED BY VALUES 'S:9BDD17811E21EFEDFB1403AAB1DD86AB481E;T:602E36430C0D8DF7E1E453;2F9933095143F432';

Step -3 Run Above alter query

SQL> ALTER USER BOB IDENTIFIED BY VALUES 'S:9BDD17811E21EFEDFB1403AAB1DD86AB481E;T:602E36430C0D8DF7E1E453;2F9933095143F432';
User altered.

Step-4 :Check users account status

SQL> select username, account_status from dba_users where username='BOB';
USERNAME                       ACCOUNT_STATUS
------------------------------ --------------------------------
BOB                            OPEN

JavaScript alert box with timer

tooltips can be used as alerts. These can be timed to appear and disappear.

CSS can be used to create tooltips and menus. More info on this can be found in 'Javascript for Dummies'. Sorry about the label of this book... Not infuring anything.

Reading other peoples answers here, I realized the answer to my own thoughts/questions. SetTimeOut could be applied to tooltips. Javascript could trigger them.

How can I limit ngFor repeat to some number of items in Angular?

 <div *ngFor="let item of list;trackBy: trackByFunc" >
   {{item.value}}
 </div>

In your ts file

 trackByFunc(index, item){
    return item ? item.id : undefined;
  }

sklearn plot confusion matrix with labels

from sklearn import model_selection
test_size = 0.33
seed = 7
X_train, X_test, y_train, y_test = model_selection.train_test_split(feature_vectors, y, test_size=test_size, random_state=seed)

from sklearn.metrics import accuracy_score, f1_score, precision_score, recall_score, classification_report, confusion_matrix

model = LogisticRegression()
model.fit(X_train, y_train)
result = model.score(X_test, y_test)
print("Accuracy: %.3f%%" % (result*100.0))
y_pred = model.predict(X_test)
print("F1 Score: ", f1_score(y_test, y_pred, average="macro"))
print("Precision Score: ", precision_score(y_test, y_pred, average="macro"))
print("Recall Score: ", recall_score(y_test, y_pred, average="macro")) 

import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
import seaborn as sns
from sklearn.metrics import confusion_matrix

def cm_analysis(y_true, y_pred, labels, ymap=None, figsize=(10,10)):
    """
    Generate matrix plot of confusion matrix with pretty annotations.
    The plot image is saved to disk.
    args: 
      y_true:    true label of the data, with shape (nsamples,)
      y_pred:    prediction of the data, with shape (nsamples,)
      filename:  filename of figure file to save
      labels:    string array, name the order of class labels in the confusion matrix.
                 use `clf.classes_` if using scikit-learn models.
                 with shape (nclass,).
      ymap:      dict: any -> string, length == nclass.
                 if not None, map the labels & ys to more understandable strings.
                 Caution: original y_true, y_pred and labels must align.
      figsize:   the size of the figure plotted.
    """
    if ymap is not None:
        y_pred = [ymap[yi] for yi in y_pred]
        y_true = [ymap[yi] for yi in y_true]
        labels = [ymap[yi] for yi in labels]
    cm = confusion_matrix(y_true, y_pred, labels=labels)
    cm_sum = np.sum(cm, axis=1, keepdims=True)
    cm_perc = cm / cm_sum.astype(float) * 100
    annot = np.empty_like(cm).astype(str)
    nrows, ncols = cm.shape
    for i in range(nrows):
        for j in range(ncols):
            c = cm[i, j]
            p = cm_perc[i, j]
            if i == j:
                s = cm_sum[i]
                annot[i, j] = '%.1f%%\n%d/%d' % (p, c, s)
            elif c == 0:
                annot[i, j] = ''
            else:
                annot[i, j] = '%.1f%%\n%d' % (p, c)
    cm = pd.DataFrame(cm, index=labels, columns=labels)
    cm.index.name = 'Actual'
    cm.columns.name = 'Predicted'
    fig, ax = plt.subplots(figsize=figsize)
    sns.heatmap(cm, annot=annot, fmt='', ax=ax)
    #plt.savefig(filename)
    plt.show()

cm_analysis(y_test, y_pred, model.classes_, ymap=None, figsize=(10,10))

using https://gist.github.com/hitvoice/36cf44689065ca9b927431546381a3f7

Note that if you use rocket_r it will reverse the colors and somehow it looks more natural and better such as below:

How to check if object has any properties in JavaScript?

When sure that the object is a user-defined one, the easiest way to determine if UDO is empty, would be the following code:

isEmpty=
/*b.b Troy III p.a.e*/
function(x,p){for(p in x)return!1;return!0};

Even though this method is (by nature) a deductive one, - it's the quickest, and fastest possible.

a={};
isEmpty(a) >> true

a.b=1
isEmpty(a) >> false

p.s.: !don't use it on browser-defined objects.

file_put_contents(meta/services.json): failed to open stream: Permission denied

rm storage/logs/laravel.log

solved this for me

Install NuGet via PowerShell script

Without having Visual Studio, you can grab Nuget from: http://nuget.org/nuget.exe

For command-line executions using this, check out: http://docs.nuget.org/docs/reference/command-line-reference

With respect to Powershell, just copy the nuget.exe to the machine. No installation required, just execute it using commands from the above documentation.

jQuery Find and List all LI elements within a UL within a specific DIV

var column1RelArray = [];
$('#column1 li').each(function(){
    column1RelArray.push($(this).attr('rel'));
});

or fp style

var column1RelArray = $('#column1 li').map(function(){ 
    return $(this).attr('rel'); 
});

Why can't I center with margin: 0 auto?

We can set the width for ul tag then it will align center.

#header ul {
    display: block;
    margin: 0 auto;
    width: 420px;
    max-width: 100%;
}

Getting the 'external' IP address in Java

How about this? It's simple and worked the best for me :)

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;


public class IP {
    public static void main(String args[]) {
        new IP();
    }

    public IP() {
        URL ipAdress;

        try {
            ipAdress = new URL("http://myexternalip.com/raw");

            BufferedReader in = new BufferedReader(new InputStreamReader(ipAdress.openStream()));

            String ip = in.readLine();
            System.out.println(ip);
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

How to add an extra language input to Android?

I don't know about sliding the space bar. I have a small box on the left of my keyboard that indicates which language is selected ( when english is selected it shows the words EN with a small microphone on top. Being that I also have spanish as one of my languages, I just tap that button and it swithces back and forth from spanish to english.

CSS Inset Borders

You may use background-clip: border-box;

Example:

.example {
padding: 2em;
border: 10px solid rgba(51,153,0,0.65);
background-clip: border-box;
background-color: yellow;
}

<div class="example">Example with background-clip: border-box;</div>

round() for float in C++

If you need to be able to compile code in environments that support the C++11 standard, but also need to be able to compile that same code in environments that don't support it, you could use a function macro to choose between std::round() and a custom function for each system. Just pass -DCPP11 or /DCPP11 to the C++11-compliant compiler (or use its built-in version macros), and make a header like this:

// File: rounding.h
#include <cmath>

#ifdef CPP11
    #define ROUND(x) std::round(x)
#else    /* CPP11 */
    inline double myRound(double x) {
        return (x >= 0.0 ? std::floor(x + 0.5) : std::ceil(x - 0.5));
    }

    #define ROUND(x) myRound(x)
#endif   /* CPP11 */

For a quick example, see http://ideone.com/zal709 .

This approximates std::round() in environments that aren't C++11-compliant, including preservation of the sign bit for -0.0. It may cause a slight performance hit, however, and will likely have issues with rounding certain known "problem" floating-point values such as 0.49999999999999994 or similar values.

Alternatively, if you have access to a C++11-compliant compiler, you could just grab std::round() from its <cmath> header, and use it to make your own header that defines the function if it's not already defined. Note that this may not be an optimal solution, however, especially if you need to compile for multiple platforms.

R numbers from 1 to 100

Your mistake is looking for range, which gives you the range of a vector, for example:

range(c(10, -5, 100))

gives

 -5 100

Instead, look at the : operator to give sequences (with a step size of one):

1:100

or you can use the seq function to have a bit more control. For example,

##Step size of 2
seq(1, 100, by=2)

##length.out: desired length of the sequence
seq(1, 100, length.out=5)

Installing Tomcat 7 as Service on Windows Server 2008

I just had the same issue and could only install tomcat7 as a serivce using the "32-bit/64-bit Windows Service Installer" version of tomcat:

http://tomcat.apache.org/download-70.cgi

Git - How to fix "corrupted" interactive rebase?

On Windows, if you are unwilling or unable to restart the machine see below.

Install Process Explorer: https://technet.microsoft.com/en-us/sysinternals/bb896653.aspx

In Process Explorer, Find > File Handle or DLL ...

Type in the file name mentioned in the error (for my error it was 'git-rebase-todo' but in the question above, 'done').

Process Explorer will highlight the process holding a lock on the file (for me it was 'grep').

Kill the process and you will be able to abort the git action in the standard way.

How to update json file with python

def updateJsonFile():
    jsonFile = open("replayScript.json", "r") # Open the JSON file for reading
    data = json.load(jsonFile) # Read the JSON into the buffer
    jsonFile.close() # Close the JSON file

    ## Working with buffered content
    tmp = data["location"] 
    data["location"] = path
    data["mode"] = "replay"

    ## Save our changes to JSON file
    jsonFile = open("replayScript.json", "w+")
    jsonFile.write(json.dumps(data))
    jsonFile.close()

How do I send a file as an email attachment using Linux command line?

Not a method for sending email, but you can use an online Git server (e.g. Bitbucket or a similar service) for that.

This way, you can use git push commands, and all versions will be stored in a compressed and organized way.

@RequestParam vs @PathVariable

it may be that the application/x-www-form-urlencoded midia type convert space to +, and the reciever will decode the data by converting the + to space.check the url for more info.http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4.1

Spring Boot Rest Controller how to return different HTTP status codes?

There are several options you can use. Quite good way is to use exceptions and class for handling called @ControllerAdvice:

@ControllerAdvice
class GlobalControllerExceptionHandler {
    @ResponseStatus(HttpStatus.CONFLICT)  // 409
    @ExceptionHandler(DataIntegrityViolationException.class)
    public void handleConflict() {
        // Nothing to do
    }
}

Also you can pass HttpServletResponse to controller method and just set response code:

public RestModel create(@RequestBody String data, HttpServletResponse response) {
    // response committed...
    response.setStatus(HttpServletResponse.SC_ACCEPTED);
}

Please refer to the this great blog post for details: Exception Handling in Spring MVC

NOTE

In Spring MVC using @ResponseBody annotation is redundant - it's already included in @RestController annotation.

Read data from SqlDataReader

while(rdr.Read())
{
   string col=rdr["colName"].ToString();
}

it wil work

Preprocessor check if multiple defines are not defined

FWIW, @SergeyL's answer is great, but here is a slight variant for testing. Note the change in logical or to logical and.

main.c has a main wrapper like this:

#if !defined(TEST_SPI) && !defined(TEST_SERIAL) && !defined(TEST_USB)
int main(int argc, char *argv[]) {
  // the true main() routine.
}

spi.c, serial.c and usb.c have main wrappers for their respective test code like this:

#ifdef TEST_USB
int main(int argc, char *argv[]) {
  // the  main() routine for testing the usb code.
}

config.h Which is included by all the c files has an entry like this:

// Uncomment below to test the serial
//#define TEST_SERIAL


// Uncomment below to test the spi code
//#define TEST_SPI

// Uncomment below to test the usb code
#define TEST_USB

Adding a default value in dropdownlist after binding with database

After data-binding, do this:

ddlColor.Items.Insert(0, new ListItem("Select","NA")); //updated code

Or follow Brian's second suggestion if you want to do it in markup.

You should probably add a RequiredFieldValidator control and set its InitialValue to "NA".

<asp:RequiredFieldValidator .. ControlToValidate="ddlColor" InitialValue="NA" />

Set the intervals of x-axis using r

You can use axis:

> axis(side=1, at=c(0:23))

That is, something like this:

plot(0:23, d, type='b', axes=FALSE)
axis(side=1, at=c(0:23))
axis(side=2, at=seq(0, 600, by=100))
box()

Python Requests requests.exceptions.SSLError: [Errno 8] _ssl.c:504: EOF occurred in violation of protocol

I encountered this error, and the fix appears to be turning off SNI, which Python 2.7 does not support:

http://bugs.python.org/issue5639

urllib3 on python 2.7 SNI error on Google App Engine

Copying sets Java

Java 8+:

Set<String> copy = new HashSet<>(mySet);

How do I make an auto increment integer field in Django?

What I needed: A document number with a fixed number of integers that would also act like an AutoField.

My searches took me all over incl. this page.

Finally I did something like this:

I created a table with a DocuNumber field as an IntegerField with foll. attributes:

max_length=6
primary_key=True
unique=True
default=100000

The max_length value anything as required (and thus the corresponding default= value).

A warning is issued while creating the said model, which I could ignore.

Afterwards, created a document (dummy) whence as expected, the document had an integer field value of 100000.

Afterwards changed the model key field as:

Changed the field type as: AutoField
Got rid of the max_length And defaultattributes
Retained the primary_key = True attribute

The next (desired document) created had the value as 100001 with subsequent numbers getting incremented by 1.

So far so good.

PDO closing connection

Its more than just setting the connection to null. That may be what the documentation says, but that is not the truth for mysql. The connection will stay around for a bit longer (Ive heard 60s, but never tested it)

If you want to here the full explanation see this comment on the connections https://www.php.net/manual/en/pdo.connections.php#114822

To force the close the connection you have to do something like

$this->connection = new PDO();
$this->connection->query('KILL CONNECTION_ID()');
$this->connection = null;

How to show Error & Warning Message Box in .NET/ How to Customize MessageBox

Try details: use any option..

    MessageBox.Show("your message",
    "window title", 
    MessageBoxButtons.OK, 
    MessageBoxIcon.Warning // for Warning  
    //MessageBoxIcon.Error // for Error 
    //MessageBoxIcon.Information  // for Information
    //MessageBoxIcon.Question // for Question
   );

Import Package Error - Cannot Convert between Unicode and Non Unicode String Data Type

Follow the below steps to avoid (cannot convert between unicode and non-unicode string data types) this error

i) Add the Data conversion Transformation tool to your DataFlow.
ii) To open the DataFlow Conversion and select [string DT_STR] datatype.
iii) Then go to Destination flow, select Mapping.
iv) change your i/p name to copy of the name.

How to fix error Base table or view not found: 1146 Table laravel relationship table?

Laravel tries to guess the name of the table, you have to specify it directly so that it does not give you that error..

Try this:

class NameModel extends Model {
    public $table = 'name_exact_of_the_table';

I hope that helps!

How can you strip non-ASCII characters from a string? (in C#)

I used this regex expression:

    string s = "søme string";
    Regex regex = new Regex(@"[^a-zA-Z0-9\s]", (RegexOptions)0);
    return regex.Replace(s, "");

HttpServletRequest to complete URL

The HttpServletRequest has the following methods:

getRequestURL() - returns the part of the full URL before query string separator character ?
getQueryString() - returns the part of the full URL after query string separator character ?

So, to get the full URL, just do:

public static String getFullURL(HttpServletRequest request) {
    StringBuilder requestURL = new StringBuilder(request.getRequestURL().toString());
    String queryString = request.getQueryString();

    if (queryString == null) {
        return requestURL.toString();
    } else {
        return requestURL.append('?').append(queryString).toString();
    }
}

Java balanced expressions check {[()]}

I call this brute force type approach we are replacing every () or {} or [] from the string with "" so therefore length of String is decreasing and if length of String doesn't change then i am simply breaking the loop otherwise if length of String gets down to 0 then it means everything in String is balanced otherwise not.

public class Question{
public static void main(String[] args) {
    String target="{ [ ( ) ] }",target2="( ) [ ] { }",target3="[ ( ) ] ( ( ) )",target4="( { [ )";
    target=target.replaceAll(" ","");
    target2=target2.replaceAll(" ", "");
    target3=target3.replaceAll(" ", "");
    target4=target4.replaceAll(" ", "");
    System.out.println(CheckExp(target));
    System.out.println(CheckExp(target2));
    System.out.println(CheckExp(target3));
    System.out.println(CheckExp(target4));
}
public static Boolean CheckExp(String target) {
    boolean flag = false;
    if (target.length() < 2 || target.length()%2!=0 ) {
        return flag;
    }
    int first,last;
    while(true) {
        first=target.length();
            target = target.replace("()", "");
            target = target.replace("{}","");
            target = target.replace("[]","");
            last=target.length();
            if(first==last)
                break;
            flag= target.length() == 0;
    }
    return flag;
}

}

Create table with jQuery - append

This line:

$('#here_table').append( '<tr><td>' + 'result' +  i + '</td></tr>' );

Appends to the div#here_table not the new table.

There are several approaches:

/* Note that the whole content variable is just a string */
var content = "<table>"
for(i=0; i<3; i++){
    content += '<tr><td>' + 'result ' +  i + '</td></tr>';
}
content += "</table>"

$('#here_table').append(content);

But, with the above approach it is less manageable to add styles and do stuff dynamically with <table>.

But how about this one, it does what you expect nearly great:

var table = $('<table>').addClass('foo');
for(i=0; i<3; i++){
    var row = $('<tr>').addClass('bar').text('result ' + i);
    table.append(row);
}

$('#here_table').append(table);

Hope this would help.

iOS UIImagePickerController result image orientation after upload

Solution for Swift 3.1 for orientation issue while capturing the image from Camera.

I have updated the solution given by jake and Metal Heart

UIImage extension

//MARK:- Image Orientation fix

extension UIImage {

    func fixOrientation() -> UIImage {

        // No-op if the orientation is already correct
        if ( self.imageOrientation == UIImageOrientation.up ) {
            return self;
        }

        // We need to calculate the proper transformation to make the image upright.
        // We do it in 2 steps: Rotate if Left/Right/Down, and then flip if Mirrored.
        var transform: CGAffineTransform = CGAffineTransform.identity

        if ( self.imageOrientation == UIImageOrientation.down || self.imageOrientation == UIImageOrientation.downMirrored ) {
            transform = transform.translatedBy(x: self.size.width, y: self.size.height)
            transform = transform.rotated(by: CGFloat(Double.pi))
        }

        if ( self.imageOrientation == UIImageOrientation.left || self.imageOrientation == UIImageOrientation.leftMirrored ) {
            transform = transform.translatedBy(x: self.size.width, y: 0)
            transform = transform.rotated(by: CGFloat(Double.pi / 2.0))
        }

        if ( self.imageOrientation == UIImageOrientation.right || self.imageOrientation == UIImageOrientation.rightMirrored ) {
            transform = transform.translatedBy(x: 0, y: self.size.height);
            transform = transform.rotated(by: CGFloat(-Double.pi / 2.0));
        }

        if ( self.imageOrientation == UIImageOrientation.upMirrored || self.imageOrientation == UIImageOrientation.downMirrored ) {
            transform = transform.translatedBy(x: self.size.width, y: 0)
            transform = transform.scaledBy(x: -1, y: 1)
        }

        if ( self.imageOrientation == UIImageOrientation.leftMirrored || self.imageOrientation == UIImageOrientation.rightMirrored ) {
            transform = transform.translatedBy(x: self.size.height, y: 0);
            transform = transform.scaledBy(x: -1, y: 1);
        }

        // Now we draw the underlying CGImage into a new context, applying the transform
        // calculated above.
        let ctx: CGContext = CGContext(data: nil, width: Int(self.size.width), height: Int(self.size.height),
                                                      bitsPerComponent: self.cgImage!.bitsPerComponent, bytesPerRow: 0,
                                                      space: self.cgImage!.colorSpace!,
                                                      bitmapInfo: self.cgImage!.bitmapInfo.rawValue)!;

        ctx.concatenate(transform)

        if ( self.imageOrientation == UIImageOrientation.left ||
            self.imageOrientation == UIImageOrientation.leftMirrored ||
            self.imageOrientation == UIImageOrientation.right ||
            self.imageOrientation == UIImageOrientation.rightMirrored ) {
            ctx.draw(self.cgImage!, in: CGRect(x: 0,y: 0,width: self.size.height,height: self.size.width))
        } else {
            ctx.draw(self.cgImage!, in: CGRect(x: 0,y: 0,width: self.size.width,height: self.size.height))
        }

        // And now we just create a new UIImage from the drawing context and return it
        return UIImage(cgImage: ctx.makeImage()!)
    }
}

Swift 2.0

//MARK:- Image Orientation fix

extension UIImage {

    func fixOrientation() -> UIImage {

        // No-op if the orientation is already correct
        if ( self.imageOrientation == UIImageOrientation.Up ) {
            return self;
        }

        // We need to calculate the proper transformation to make the image upright.
        // We do it in 2 steps: Rotate if Left/Right/Down, and then flip if Mirrored.
        var transform: CGAffineTransform = CGAffineTransformIdentity

        if ( self.imageOrientation == UIImageOrientation.Down || self.imageOrientation == UIImageOrientation.DownMirrored ) {
            transform = CGAffineTransformTranslate(transform, self.size.width, self.size.height)
            transform = CGAffineTransformRotate(transform, CGFloat(M_PI))
        }

        if ( self.imageOrientation == UIImageOrientation.Left || self.imageOrientation == UIImageOrientation.LeftMirrored ) {
            transform = CGAffineTransformTranslate(transform, self.size.width, 0)
            transform = CGAffineTransformRotate(transform, CGFloat(M_PI_2))
        }

        if ( self.imageOrientation == UIImageOrientation.Right || self.imageOrientation == UIImageOrientation.RightMirrored ) {
            transform = CGAffineTransformTranslate(transform, 0, self.size.height);
            transform = CGAffineTransformRotate(transform,  CGFloat(-M_PI_2));
        }

        if ( self.imageOrientation == UIImageOrientation.UpMirrored || self.imageOrientation == UIImageOrientation.DownMirrored ) {
            transform = CGAffineTransformTranslate(transform, self.size.width, 0)
            transform = CGAffineTransformScale(transform, -1, 1)
        }

        if ( self.imageOrientation == UIImageOrientation.LeftMirrored || self.imageOrientation == UIImageOrientation.RightMirrored ) {
            transform = CGAffineTransformTranslate(transform, self.size.height, 0);
            transform = CGAffineTransformScale(transform, -1, 1);
        }

        // Now we draw the underlying CGImage into a new context, applying the transform
        // calculated above.
        let ctx: CGContextRef = CGBitmapContextCreate(nil, Int(self.size.width), Int(self.size.height),
            CGImageGetBitsPerComponent(self.CGImage), 0,
            CGImageGetColorSpace(self.CGImage),
            CGImageGetBitmapInfo(self.CGImage).rawValue)!;

        CGContextConcatCTM(ctx, transform)

        if ( self.imageOrientation == UIImageOrientation.Left ||
            self.imageOrientation == UIImageOrientation.LeftMirrored ||
            self.imageOrientation == UIImageOrientation.Right ||
            self.imageOrientation == UIImageOrientation.RightMirrored ) {
                CGContextDrawImage(ctx, CGRectMake(0,0,self.size.height,self.size.width), self.CGImage)
        } else {
            CGContextDrawImage(ctx, CGRectMake(0,0,self.size.width,self.size.height), self.CGImage)
        }

        // And now we just create a new UIImage from the drawing context and return it
        return UIImage(CGImage: CGBitmapContextCreateImage(ctx)!)
    }
}

Use of this UIImage Extension in your code:

let fixOrientationImage=chosenImage.fixOrientation()

place this in your delegate methods of image picker like this

Swift 3.1

//MARK: Image Picker Delegates
    func imagePickerController(
        _ picker: UIImagePickerController,
        didFinishPickingMediaWithInfo info: [String : Any]){
        let chosenImage = info[UIImagePickerControllerOriginalImage] as! UIImage
        profileImg.contentMode = .scaleAspectFill
        let fixOrientationImage=chosenImage.fixOrientation()
        profileImg.image = fixOrientationImage

        dismiss(animated: true, completion: nil)
    }

Swift 2.0

//MARK: Image Picker Delegates
    func imagePickerController(
        picker: UIImagePickerController,
        didFinishPickingMediaWithInfo info: [String : AnyObject])
    {
        let chosenImage = info[UIImagePickerControllerOriginalImage] as! UIImage
        profileImg.contentMode = .ScaleAspectFill
        **//Fix the image orientation**
         let fixOrientationImage=chosenImage.fixOrientation()
        profileImg.image = fixOrientationImage

        dismissViewControllerAnimated(true, completion: nil)
    }

Printing without newline (print 'a',) prints a space, how to remove?

If you want them to show up one at a time, you can do this:

import time
import sys
for i in range(20):
    sys.stdout.write('a')
    sys.stdout.flush()
    time.sleep(0.5)

sys.stdout.flush() is necessary to force the character to be written each time the loop is run.

HTML table: keep the same width for columns

give this style to td: width: 1%;

changing visibility using javascript

If you just want to display it when you get a response add this to your loadpage()

function loadpage(page_request, containerid){
   if (page_request.readyState == 4 && page_request.status==200) { 
      var container = document.getElementById(containerid);
      container.innerHTML=page_request.responseText;
      container.style.visibility = 'visible';
      // or 
      container.style.display = 'block';
}

but this depend entirely on how you hid the div in the first place

JAVA_HOME is set to an invalid directory:

JAVA_HOME should be C:\Program Files\Java\jdk1.8.0_172 don't include semi-colon(;) or bin in path. Any jdk version above 7 will work. Also, you need to re-start the cmd

Using Postman to access OAuth 2.0 Google APIs

I figured out that I was not generating Credentials for the right app type.
If you're using Postman to test Google oAuth 2 APIs, select
Credentials -> Add credentials -> OAuth2.0 client ID -> Web Application.

what do <form action="#"> and <form method="post" action="#"> do?

Action normally specifies the file/page that the form is submitted to (using the method described in the method paramater (post, get etc.))

An action of # indicates that the form stays on the same page, simply suffixing the url with a #. Similar use occurs in anchors. <a href=#">Link</a> for example, will stay on the same page.

Thus, the form is submitted to the same page, which then processes the data etc.

git: fatal: I don't handle protocol '??http'

I used double quotes for the URL and it worked. So something like

git clone "??http://git.fedorahosted.org/git/ibus-typing-booster.git"

works.. single quotes dont help. It has to be double quotes.

how to stop Javascript forEach?

You can break from a forEach loop if you overwrite the Array method:

(function(){
    window.broken = false;

        Array.prototype.forEach = function(cb, thisArg) {
            var newCb = new Function("with({_break: function(){window.broken = true;}}){("+cb.replace(/break/g, "_break()")+"(arguments[0], arguments[1], arguments[2]));}");
            this.some(function(item, index, array){
                 newCb(item, index, array);
                 return window.broken;
            }, thisArg);
            window.broken = false;
        }

}())

example:

[1,2,3].forEach("function(x){\
    if (x == 2) break;\
    console.log(x)\
}")

Unfortunately with this solution you can't use normal break inside your callbacks, you must wrap invalid code in strings and native functions don't work directly (but you can work around that)

Happy breaking!

How to clear browsing history using JavaScript?

No,that would be a security issue.

However, it's possible to clear the history in JavaScript within a Google chrome extension. chrome.history.deleteAll().

Use

window.location.replace('pageName.html');

similar behavior as an HTTP redirect

Read How to redirect to another webpage in JavaScript/jQuery?

Center an element in Bootstrap 4 Navbar

Updated for Bootstrap 4.1+

Bootstrap 4 the navbar now uses flexbox so the Website Name can be centered using mx-auto. The left and right side menus don't require floats.

<nav class="navbar navbar-expand-md navbar-fixed-top navbar-dark bg-dark main-nav">
    <div class="container">
        <ul class="nav navbar-nav">
            <li class="nav-item active">
                <a class="nav-link" href="#">Home</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Download</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Register</a>
            </li>
        </ul>
        <ul class="nav navbar-nav mx-auto">
            <li class="nav-item"><a class="nav-link" href="#">Website Name</a></li>
        </ul>
        <ul class="nav navbar-nav">
            <li class="nav-item">
                <a class="nav-link" href="#">Rates</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Help</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Contact</a>
            </li>
        </ul>
    </div>
</nav>

Navbar center with mx-auto Demo

If the Navbar only has a single navbar-nav, then justify-content-center can also be used to center.

EDIT

In the solution above, the Website Name is centered relative to the left and right navbar-nav so if the width of these adjacent navs are different the Website Name is no longer centered.

To resolve this, one of the flexbox workarounds for absolute centering can be used...

Option 1 - Use position:absolute;

Since it's ok to use absolute positioning in flexbox, one option is to use this on the item to be centered.

.abs-center-x {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

Navbar center with absolute position Demo

Option 2 - Use flexbox nesting

~~Finally, another option is to make the centered item also display:flexbox (using d-flex) and center justified. In this case each navbar component must have flex-grow:1~~

As of Bootstrap 4 Beta, the Navbar is now display:flex. Bootstrap 4.1.0 includes a new flex-fill class to make each nav section fill the width:

<nav class="navbar navbar-expand-sm navbar-dark bg-dark main-nav">
    <div class="container justify-content-center">
        <ul class="nav navbar-nav flex-fill w-100 flex-nowrap">
            <li class="nav-item active">
                <a class="nav-link" href="#">Home</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Download</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Register</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">More</a>
            </li>
        </ul>
        <ul class="nav navbar-nav flex-fill justify-content-center">
            <li class="nav-item"><a class="nav-link" href="#">Center</a></li>
        </ul>
        <ul class="nav navbar-nav flex-fill w-100 justify-content-end">
            <li class="nav-item">
                <a class="nav-link" href="#">Help</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Contact</a>
            </li>
        </ul>
    </div>
</nav>

Navbar center with flexbox nesting Demo

Prior to Bootstrap 4.1.0 you can add the flex-fill class like this...

.flex-fill {
   flex:1
}

As of 4.1 flex-fill is included in Bootstrap.

Bootstrap 4 Navbar center demos
More centering demos
Center links on desktop, left align on mobile

Detecting input change in jQuery?

If you want the event to be fired whenever something is changed within the element then you could use the keyup event.

Disabling Minimize & Maximize On WinForm?

Right Click the form you want to hide them on, choose Controls -> Properties.

In Properties, set

Control Box -> False
Minimize Box -> False
Maximize Box -> False

You'll do this in the designer.

Align two divs horizontally side by side center to the page using bootstrap css

Alternative which I did programming Angular:

    <div class="form-row">
        <div class="form-group col-md-7">
             Left
        </div>
        <div class="form-group col-md-5">
             Right
        </div>
    </div>

How to replace all strings to numbers contained in each string in Notepad++?

Find: value="([\d]+|[\d])"

Replace: \1

It will really return you

4
403
200
201
116
15

js:

a='value="4"\nvalue="403"\nvalue="200"\nvalue="201"\nvalue="116"\nvalue="15"';
a = a.replace(/value="([\d]+|[\d])"/g, '$1');
console.log(a);

lexers vs parsers

Yes, they are very different in theory, and in implementation.

Lexers are used to recognize "words" that make up language elements, because the structure of such words is generally simple. Regular expressions are extremely good at handling this simpler structure, and there are very high-performance regular-expression matching engines used to implement lexers.

Parsers are used to recognize "structure" of a language phrases. Such structure is generally far beyond what "regular expressions" can recognize, so one needs "context sensitive" parsers to extract such structure. Context-sensitive parsers are hard to build, so the engineering compromise is to use "context-free" grammars and add hacks to the parsers ("symbol tables", etc.) to handle the context-sensitive part.

Neither lexing nor parsing technology is likely to go away soon.

They may be unified by deciding to use "parsing" technology to recognize "words", as is currently explored by so-called scannerless GLR parsers. That has a runtime cost, as you are applying more general machinery to what is often a problem that doesn't need it, and usually you pay for that in overhead. Where you have lots of free cycles, that overhead may not matter. If you process a lot of text, then the overhead does matter and classical regular expression parsers will continue to be used.

Where can I get Google developer key

Go to https://code.google.com/p/google-api-php-client/wiki/OAuth2

Scroll down to where it says 'Visit the Google API Console to generate your developer key, OAuth2 client id, OAuth2 client secret, and register your OAuth2 redirect uri. Copy their values since your will need to input them in your application.'

Click on the 'Google API Console' link.

When it pops up and says 'Welcome to the new Google Developers Console! Prefer the old console? Go back | Dismiss' Click on 'GO BACK'

How can I set a UITableView to grouped style

Swift 4+:

let myTableViewController = UITableViewController(style: .grouped)

Flutter: how to make a TextField with HintText but no Underline?

decoration: InputDecoration(
 border:OutLineInputBorder(
 borderSide:BorderSide.none
 bordeRadius: BordeRadius.circular(20.0)
 )
)

Difference between using Makefile and CMake to compile the code

Make (or rather a Makefile) is a buildsystem - it drives the compiler and other build tools to build your code.

CMake is a generator of buildsystems. It can produce Makefiles, it can produce Ninja build files, it can produce KDEvelop or Xcode projects, it can produce Visual Studio solutions. From the same starting point, the same CMakeLists.txt file. So if you have a platform-independent project, CMake is a way to make it buildsystem-independent as well.

If you have Windows developers used to Visual Studio and Unix developers who swear by GNU Make, CMake is (one of) the way(s) to go.

I would always recommend using CMake (or another buildsystem generator, but CMake is my personal preference) if you intend your project to be multi-platform or widely usable. CMake itself also provides some nice features like dependency detection, library interface management, or integration with CTest, CDash and CPack.

Using a buildsystem generator makes your project more future-proof. Even if you're GNU-Make-only now, what if you later decide to expand to other platforms (be it Windows or something embedded), or just want to use an IDE?

How to know if an object has an attribute in Python

I would like to suggest avoid this:

try:
    doStuff(a.property)
except AttributeError:
    otherStuff()

The user @jpalecek mentioned it: If an AttributeError occurs inside doStuff(), you are lost.

Maybe this approach is better:

try:
    val = a.property
except AttributeError:
    otherStuff()
else:
    doStuff(val)

string.IsNullOrEmpty(string) vs. string.IsNullOrWhiteSpace(string)

Here is the actual implementation of both methods ( decompiled using dotPeek)

[TargetedPatchingOptOut("Performance critical to inline across NGen image boundaries")]
    public static bool IsNullOrEmpty(string value)
    {
      if (value != null)
        return value.Length == 0;
      else
        return true;
    }

    /// <summary>
    /// Indicates whether a specified string is null, empty, or consists only of white-space characters.
    /// </summary>
    /// 
    /// <returns>
    /// true if the <paramref name="value"/> parameter is null or <see cref="F:System.String.Empty"/>, or if <paramref name="value"/> consists exclusively of white-space characters.
    /// </returns>
    /// <param name="value">The string to test.</param>
    public static bool IsNullOrWhiteSpace(string value)
    {
      if (value == null)
        return true;
      for (int index = 0; index < value.Length; ++index)
      {
        if (!char.IsWhiteSpace(value[index]))
          return false;
      }
      return true;
    }

Which is the best library for XML parsing in java

Nikita's point is an excellent one: don't confuse mature with bad. XML hasn't changed much.

JDOM would be another alternative to DOM4J.

Adding rows dynamically with jQuery

This will get you close, the add button has been removed out of the table so you might want to consider this...

<script type="text/javascript">
    $(document).ready(function() {
        $("#add").click(function() {
          $('#mytable tbody>tr:last').clone(true).insertAfter('#mytable tbody>tr:last');
          return false;
        });
    });
</script>

HTML markup looks like this

  <a  id="add">+</a></td>
  <table id="mytable" width="300" border="1" cellspacing="0" cellpadding="2">
  <tbody>
    <tr>
      <td>Name</td>
    </tr>
    <tr class="person">
      <td><input type="text" name="name" id="name" /></td>
    </tr>
    </tbody>
  </table>

EDIT To empty a value of a textbox after insert..

    $('#mytable tbody>tr:last').clone(true).insertAfter('#mytable tbody>tr:last');
    $('#mytable tbody>tr:last #name').val('');
    return false;

EDIT2 Couldn't help myself, to reset all dropdown lists in the inserted TR you can do this

$("#mytable tbody>tr:last").each(function() {this.reset();});

I will leave the rest to you!

What is PAGEIOLATCH_SH wait type in SQL Server?

PAGEIOLATCH_SH wait type usually comes up as the result of fragmented or unoptimized index.

Often reasons for excessive PAGEIOLATCH_SH wait type are:

I/O subsystem has a problem or is misconfigured
Overloaded I/O subsystem by other processes that are producing the high I/O activity
Bad index management
Logical or physical drive misconception
Network issues/latency
Memory pressure
Synchronous Mirroring and AlwaysOn AG

In order to try and resolve having high PAGEIOLATCH_SH wait type, you can check:

SQL Server, queries and indexes, as very often this could be found as a root cause of the excessive PAGEIOLATCH_SH wait types
For memory pressure before jumping into any I/O subsystem troubleshooting

Always keep in mind that in case of high safety Mirroring or synchronous-commit availability in AlwaysOn AG, increased/excessive PAGEIOLATCH_SH can be expected.

You can find more details about this topic in the article Handling excessive SQL Server PAGEIOLATCH_SH wait types

How to set cell spacing and UICollectionView - UICollectionViewFlowLayout size ratio?

For Swift 3 and XCode 8, this worked. Follow below steps to achieve this:-

viewDidLoad()
    {
        let layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout()
        var width = UIScreen.main.bounds.width
        layout.sectionInset = UIEdgeInsets(top: 0, left: 5, bottom: 0, right: 5)
    width = width - 10
    layout.itemSize = CGSize(width: width / 2, height: width / 2)
        layout.minimumInteritemSpacing = 0
        layout.minimumLineSpacing = 0
        collectionView!.collectionViewLayout = layout
    }

How to wait for async method to complete?

just put Wait() to wait until task completed

GetInputReportViaInterruptTransfer().Wait();

Abort trap 6 error in C

Try this:

void drawInitialNim(int num1, int num2, int num3){
    int board[3][50] = {0}; // This is a local variable. It is not possible to use it after returning from this function. 

    int i, j, k;

    for(i=0; i<num1; i++)
        board[0][i] = 'O';
    for(i=0; i<num2; i++)
        board[1][i] = 'O';
    for(i=0; i<num3; i++)
        board[2][i] = 'O';

    for (j=0; j<3;j++) {
        for (k=0; k<50; k++) {
            if(board[j][k] != 0)
                printf("%c", board[j][k]);
        }
        printf("\n");
    }
}

How to use continue in jQuery each() loop?

return or return false are not the same as continue. If the loop is inside a function the remainder of the function will not execute as you would expect with a true "continue".

How to empty a char array?

By "empty an array" if you mean reset to 0, then you can use bzero.

#include <strings.h>  
void bzero(void *s, size_t n);

If you want to fill the array with some other default character then you may use memset function.

#include <string.h>  
void *memset(void *s, int c, size_t n);

Git Clone from GitHub over https with two-factor authentication

Find out how to fix this here:

https://github.com/blog/1614-two-factor-authentication#how-does-it-work-for-command-line-git

How does it work for command-line Git?

If you are using SSH for Git authentication, rest easy: you don't need to do anything. If you are using HTTPS Git, instead of entering your password, enter a personal access token. These can be created by going to your personal access tokens page.

Violation of PRIMARY KEY constraint. Cannot insert duplicate key in object

To prevent inserting a record that exist already. I'd check if the ID value exists in the database. For the example of a Table created with an IDENTITY PRIMARY KEY:

CREATE TABLE [dbo].[Persons] (    
    ID INT IDENTITY(1,1) PRIMARY KEY,
    LastName VARCHAR(40) NOT NULL,
    FirstName VARCHAR(40)
);

When JANE DOE and JOE BROWN already exist in the database.

SET IDENTITY_INSERT [dbo].[Persons] OFF;
INSERT INTO [dbo].[Persons] (FirstName,LastName)
VALUES ('JANE','DOE'); 
INSERT INTO Persons (FirstName,LastName) 
VALUES ('JOE','BROWN');

DATABASE OUTPUT of TABLE [dbo].[Persons] will be:

ID    LastName   FirstName
1     DOE        Jane
2     BROWN      JOE

I'd check if i should update an existing record or insert a new one. As the following JAVA example:

int NewID = 1;
boolean IdAlreadyExist = false;
// Using SQL database connection
// STEP 1: Set property
System.setProperty("java.net.preferIPv4Stack", "true");
// STEP 2: Register JDBC driver
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
// STEP 3: Open a connection
try (Connection conn1 = DriverManager.getConnection(DB_URL, USER,pwd) {
    conn1.setAutoCommit(true);
    String Select = "select * from Persons where  ID = " + ID;
    Statement st1 = conn1.createStatement();
    ResultSet rs1 = st1.executeQuery(Select);
    // iterate through the java resultset
    while (rs1.next()) {
        int ID = rs1.getInt("ID");
        if (NewID==ID) {
            IdAlreadyExist = true;
        }

    }
    conn1.close();
} catch (SQLException e1) {
    System.out.println(e1);
}
if (IdAlreadyExist==false) {
    //Insert new record code here
} else {
    //Update existing record code here
}

How to build PDF file from binary string returned from a web-service using javascript

Detect the browser and use Data-URI for Chrome and use PDF.js as below for other browsers.

PDFJS.getDocument(url_of_pdf)
.then(function(pdf) {
    return pdf.getPage(1);
})
.then(function(page) {
    // get a viewport
    var scale = 1.5;
    var viewport = page.getViewport(scale);
    // get or create a canvas
    var canvas = ...;
    canvas.width = viewport.width;
    canvas.height = viewport.height;

    // render a page
    page.render({
        canvasContext: canvas.getContext('2d'),
        viewport: viewport
    });
})
.catch(function(err) {
    // deal with errors here!
});

.NET HttpClient. How to POST string value?

Below is example to call synchronously but you can easily change to async by using await-sync:

var pairs = new List<KeyValuePair<string, string>>
            {
                new KeyValuePair<string, string>("login", "abc")
            };

var content = new FormUrlEncodedContent(pairs);

var client = new HttpClient {BaseAddress = new Uri("http://localhost:6740")};

    // call sync
var response = client.PostAsync("/api/membership/exist", content).Result; 
if (response.IsSuccessStatusCode)
{
}

Converting binary to decimal integer output

There is actually a much faster alternative to convert binary numbers to decimal, based on artificial intelligence (linear regression) model:

Train an AI algorithm to convert 32-binary number to decimal based.
Predict a decimal representation from 32-binary.

See example and time comparison below:

from sklearn.linear_model import LinearRegression
from sklearn.model_selection import train_test_split
import numpy as np

y = np.random.randint(0, 2**32, size=10_000)

def gen_x(y):
    _x = bin(y)[2:]
    n = 32 - len(_x)
    return [int(sym) for sym in '0'*n + _x]

X = np.array([gen_x(x) for x in y])

model = LinearRegression()
model.fit(X, y)

def convert_bin_to_dec_ai(array):
    return model.predict(array)

y_pred = convert_bin_to_dec_ai(X)

Time comparison:

This AI solution converts numbers almost x10 times faster than conventional way!

How can I comment a single line in XML?

Not orthodox, but it works for me sometimes; set your comment as another attribute:

<node usefulAttr="foo" comment="Your comment here..."/>

Convert MySQL to SQlite

Simplest way to Convert MySql DB to Sqlite:

1) Generate sql dump file for you MySql database.

2) Upload the file to RebaseData online converter here

3) A download button will appear on page to download database in Sqlite format

java.util.zip.ZipException: duplicate entry during packageAllDebugClassesForMultiDex

just erase android/support/v4/util/TimeUtils.class

Removing Duplicate Values from ArrayList

 public void removeDuplicates() {
    ArrayList<Object> al = new ArrayList<Object>();
    al.add("java");
    al.add('a');
    al.add('b');
    al.add('a');
    al.add("java");
    al.add(10.3);
    al.add('c');
    al.add(14);
    al.add("java");
    al.add(12);

    System.out.println("Before Remove Duplicate elements:" + al);
    for (int i = 0; i < al.size(); i++) {
        for (int j = i + 1; j < al.size(); j++) {
            if (al.get(i).equals(al.get(j))) {
                al.remove(j);
                j--;
            }
        }
    }
    System.out.println("After Removing duplicate elements:" + al);
}

Before Remove Duplicate elements:

[java, a, b, a, java, 10.3, c, 14, java, 12]

After Removing duplicate elements:

[java, a, b, 10.3, c, 14, 12]

String concatenation in Ruby

Since this is a path I'd probably use array and join:

source = [ROOT_DIR, project, 'App.config'] * '/'

How to count string occurrence in string?

ES2020 offers a new MatchAll which might be of use in this particular context.

Here we create a new RegExp, please ensure you pass 'g' into the function.

Convert the result using Array.from and count the length, which returns 2 as per the original requestor's desired output.

_x000D_

let strToCheck = RegExp('is', 'g')
let matchesReg = "This is a string.".matchAll(strToCheck)
console.log(Array.from(matchesReg).length) // 2

_x000D_

VideoView Full screen in android application

I have done this way:

Check these reference screen shots.

Add class FullScreenVideoView.java:

import android.content.Context;
import android.util.AttributeSet;
import android.widget.VideoView;

public class FullScreenVideoView extends VideoView {
    public FullScreenVideoView(Context context) {
        super(context);
    }

    public FullScreenVideoView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public FullScreenVideoView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec){
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        setMeasuredDimension(widthMeasureSpec, heightMeasureSpec);
    }
}

How to bind with xml:

<FrameLayout
   android:id="@+id/secondMedia"
   android:layout_width="match_parent"
   android:layout_height="match_parent">

     <com.my.package.customview.FullScreenVideoView
           android:layout_width="match_parent"
           android:layout_height="match_parent" 
           android:id="@+id/fullScreenVideoView"/>

</FrameLayout>

Hope this will help you.

'AND' vs '&&' as operator

Another nice example using if statements without = assignment operations.

if (true || true && false); // is the same as:
if (true || (true && false)); // TRUE

and

if (true || true AND false); // is the same as:
if ((true || true) && false); // FALSE

because AND has a lower precedence and thus || a higher precedence.

These are different in the cases of true, false, false and true, true, false. See https://ideone.com/lsqovs for en elaborate example.

Where is array's length property defined?

Arrays are special objects in java, they have a simple attribute named length which is final.

There is no "class definition" of an array (you can't find it in any .class file), they're a part of the language itself.

10.7. Array Members

The members of an array type are all of the following:

The public final field length, which contains the number of components of the array. length may be positive or zero.

The public method clone, which overrides the method of the same name in class Object and throws no checked exceptions. The return type of the clone method of an array type T[] is T[].

A clone of a multidimensional array is shallow, which is to say that it creates only a single new array. Subarrays are shared.

All the members inherited from class Object; the only method of Object that is not inherited is its clone method.

Resources:

JLS - Arrays

How do I copy a hash in Ruby?

As mentioned in Security Considerations section of Marshal documentation,

If you need to deserialize untrusted data, use JSON or another serialization format that is only able to load simple, ‘primitive’ types such as String, Array, Hash, etc.

Here is an example on how to do cloning using JSON in Ruby:

require "json"

original = {"John"=>"Adams","Thomas"=>"Jefferson","Johny"=>"Appleseed"}
cloned = JSON.parse(JSON.generate(original))

# Modify original hash
original["John"] << ' Sandler'
p original 
#=> {"John"=>"Adams Sandler", "Thomas"=>"Jefferson", "Johny"=>"Appleseed"}

# cloned remains intact as it was deep copied
p cloned  
#=> {"John"=>"Adams", "Thomas"=>"Jefferson", "Johny"=>"Appleseed"}

How to check whether dynamically attached event listener exists or not?

There doesn't appear to be a cross browser function that searches for events registered under a given element.

However, it is possible to view the call back functions for elements in some browsers using their development tools. This can be useful when attempting to determine how a web page functions or for debugging code.

Firefox

First, view the element in the Inspector tab within the developer tools. This can be done:

On the page by right clicking on the item on the web page that you want to inspect and selecting "Inspect Element" from the menu.
Within the console by using a function to select the element, such as document.querySelector, and then clicking the icon beside the element to view it in the Inspector tab.

If any events were registered to the element, you will see a button containing the word Event beside the element. Clicking it will allow you to see the events that have been registered with the element. Clicking the arrow beside an event allows you to view the callback function for it.

Chrome

First, view the element in the Elements tab within the developer tools. This can be done:

On the page by right clicking on the item on the web page that you want to inspect and selecting "Inspect" from the menu
Within the console by using a function to select the element, such as document.querySelector, right clicking the the element, and selecting "Reveal in Elements panel" to view it in the Inspector tab.

Near the section of the window that shows the tree containing the web page elements, there should be another section with a tab entitled "Event Listeners". Select it to see events that were registered to the element. To see the code for a given event, click the link to the right of it.

In Chrome, events for an element can also be found using the getEventListeners function. However, based on my tests, the getEventListeners function doesn't list events when multiple elements are passed to it. If you want to find all of the elements on the page that have listeners and view the callback functions for those listeners, you can use the following code in the console to do this:

var elems = document.querySelectorAll('*');

for (var i=0; i <= elems.length; i++) {
    var listeners = getEventListeners(elems[i]);

    if (Object.keys(listeners).length < 1) {
        continue;
    }

    console.log(elems[i]);

    for (var j in listeners) {
        console.log('Event: '+j);

        for (var k=0; k < listeners[j].length; k++) {
            console.log(listeners[j][k].listener);
        }
    }
}

Please edit this answer if you know of ways to do this in the given browsers or in other browsers.

Fit Image into PictureBox

You can set picturebox's SizeMode property to PictureSizeMode.Zoom, this will increase the size of smaller images or decrease the size of larger images to fill the PictureBox

How do I format a String in an email so Outlook will print the line breaks?

if work need to be done with formatted text with out html encoding. it can be easy achieved with following scenario that creates div element on the fly and using <pre></pre> html element to keep formatting.

var email_body = htmlEncode($("#Body").val());

 function htmlEncode(value) {
    return "<pre>" + $('<div/>').text(value).html() + "</pre>";
}

How to Auto resize HTML table cell to fit the text size

You can try this:

HTML

<table>
    <tr>
        <td class="shrink">element1</td>
        <td class="shrink">data</td>
        <td class="shrink">junk here</td>
        <td class="expand">last column</td>
    </tr>
    <tr>
        <td class="shrink">elem</td>
        <td class="shrink">more data</td>
        <td class="shrink">other stuff</td>
        <td class="expand">again, last column</td>
    </tr>
    <tr>
        <td class="shrink">more</td>
        <td class="shrink">of </td>
        <td class="shrink">these</td>
        <td class="expand">rows</td>
    </tr>
</table>

CSS

table {
    border: 1px solid green;
    border-collapse: collapse;
    width:100%;
}

table td {
    border: 1px solid green;
}

table td.shrink {
    white-space:nowrap
}
table td.expand {
    width: 99%
}

How to reference a .css file on a razor view?

You can this structure in Layout.cshtml file

<link href="~/YourCssFolder/YourCssStyle.css" rel="stylesheet" type="text/css" />

Xcode 12, building for iOS Simulator, but linking in object file built for iOS, for architecture arm64

The Valid Architectures build setting has been removed in Xcode 12. If you had values in this build setting, they're causing a problem and need to be removed.

I was able to "clear out" the VALID_ARCHS build setting by adding it back in as a User-Defined build setting (with no values), running the project (which failed), and then deleting the VALID_ARCHS build setting. After that, I was able to run on the simulator.

My Architectures build setting is Standard Architectures.

You can add a User-Defined Setting from the plus button in Build Settings:

In laymans terms, what does 'static' mean in Java?

Above points are correct and I want to add some more important points about Static keyword.

Internally what happening when you are using static keyword is it will store in permanent memory(that is in heap memory),we know that there are two types of memory they are stack memory(temporary memory) and heap memory(permanent memory),so if you are not using static key word then will store in temporary memory that is in stack memory(or you can call it as volatile memory).

so you will get a doubt that what is the use of this right???

example: static int a=10;(1 program)

just now I told if you use static keyword for variables or for method it will store in permanent memory right.

so I declared same variable with keyword static in other program with different value.

example: static int a=20;(2 program)

the variable 'a' is stored in heap memory by program 1.the same static variable 'a' is found in program 2 at that time it won`t create once again 'a' variable in heap memory instead of that it just replace value of a from 10 to 20.

In general it will create once again variable 'a' in stack memory(temporary memory) if you won`t declare 'a' as static variable.

overall i can say that,if we use static keyword
1.we can save memory
2.we can avoid duplicates
3.No need of creating object in-order to access static variable with the help of class name you can access it.

Javascript Append Child AFTER Element

You could also do

function insertAfter(node1, node2) {
    node1.outerHTML += node2.outerHTML;
}

function insertAfter2(node1, node2) {
    var wrap = document.createElement("div");
    wrap.appendChild(node2.cloneNode(true));
    var node2Html = wrap.innerHTML;
    node1.insertAdjacentHTML('afterend', node2Html);
}

How to store Emoji Character in MySQL Database

1) Database: Change Database default collation as utf8mb4.

2) Table: Change table collation as CHARACTER SET utf8mb4 COLLATE utf8mb4_bin.

Query:

ALTER TABLE Tablename CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_bin

3) Code:

INSERT INTO tablename (column1, column2, column3, column4, column5, column6, column7)
VALUES ('273', '3', 'Hdhdhdhhzhzhzzhjzj ??? ?', 49, 1, '2016-09-13 08:02:29', '2016-09-13 08:02:29')

4) Set utf8mb4 in database connection:

  $database_connection = new mysqli($server, $user, $password, $database_name); 
  $database_connection->set_charset('utf8mb4');

How to parse a String containing XML in Java and retrieve the value of the root node?

I think you would be look at String class, there are multiple ways to do it. What about substring(int,int) and indexOf(int) lastIndexOf(int)?

'Access denied for user 'root'@'localhost' (using password: NO)'

For MySQL 5.7. These are the below steps:

Stop your MySQL server completely. This can be done by accessing the Services window inside Windows XP and Windows Server 2003, where you can stop the MySQL service.

Open your MS-DOS command prompt using "cmd" inside the Run window. Inside it navigate to your MySQL bin folder, such as C:\MySQL\bin using the cd command.

Execute the following command in the command prompt: mysqld.exe -u root --skip-grant-tables

Leave the current MS-DOS command prompt as it is, and open a new MS-DOS command prompt window.

Navigate to your MySQL bin folder, such as C:\MySQL\bin using the cd command.

Enter mysql and press enter.

You should now have the MySQL command prompt working. Type use mysql; so that we switch to the "mysql" database.

Execute the following command to update the password:

update user set authentication_string=password('1111') where user='root';

Can't use method return value in write context

empty() needs to access the value by reference (in order to check whether that reference points to something that exists), and PHP before 5.5 didn't support references to temporary values returned from functions.

However, the real problem you have is that you use empty() at all, mistakenly believing that "empty" value is any different from "false".

Empty is just an alias for !isset($thing) || !$thing. When the thing you're checking always exists (in PHP results of function calls always exist), the empty() function is nothing but a negation operator.

PHP doesn't have concept of emptyness. Values that evaluate to false are empty, values that evaluate to true are non-empty. It's the same thing. This code:

$x = something();
if (empty($x)) …

and this:

$x = something();
if (!$x) …

has always the same result, in all cases, for all datatypes (because $x is defined empty() is redundant).

Return value from the method always exists (even if you don't have return statement, return value exists and contains null). Therefore:

if (!empty($r->getError()))

is logically equivalent to:

if ($r->getError())

Best way to make a shell script daemon?

Here is the minimal change to the original proposal to create a valid daemon in Bourne shell (or Bash):

#!/bin/sh
if [ "$1" != "__forked__" ]; then
    setsid "$0" __forked__ "$@" &
    exit
else
    shift
fi

trap 'siguser1=true' SIGUSR1
trap 'echo "Clean up and exit"; kill $sleep_pid; exit' SIGTERM
exec > outfile
exec 2> errfile
exec 0< /dev/null

while true; do
    (sleep 30000000 &>/dev/null) &
    sleep_pid=$!
    wait
    kill $sleep_pid &>/dev/null
    if [ -n "$siguser1" ]; then
        siguser1=''
        echo "Wait was interrupted by SIGUSR1, do things here."
    fi
done

Explanation:

Line 2-7: A daemon must be forked so it doesn't have a parent. Using an artificial argument to prevent endless forking. "setsid" detaches from starting process and terminal.
Line 9: Our desired signal needs to be differentiated from other signals.
Line 10: Cleanup is required to get rid of dangling "sleep" processes.
Line 11-13: Redirect stdout, stderr and stdin of the script.
Line 16: sleep in the background
Line 18: wait waits for end of sleep, but gets interrupted by (some) signals.
Line 19: Kill sleep process, because that is still running when signal is caught.
Line 22: Do the work if SIGUSR1 has been caught.

Guess it does not get any simpler than that.

Use getElementById on HTMLElement instead of HTMLDocument

I don't like it either.

So use javascript:

Public Function GetJavaScriptResult(doc as HTMLDocument, jsString As String) As String

    Dim el As IHTMLElement
    Dim nd As HTMLDOMTextNode

    Set el = doc.createElement("INPUT")
    Do
        el.ID = GenerateRandomAlphaString(100)
    Loop Until Document.getElementById(el.ID) Is Nothing
    el.Style.display = "none"
    Set nd = Document.appendChild(el)

    doc.parentWindow.ExecScript "document.getElementById('" & el.ID & "').value = " & jsString

    GetJavaScriptResult = Document.getElementById(el.ID).Value

    Document.removeChild nd

End Function


Function GenerateRandomAlphaString(Length As Long) As String

    Dim i As Long
    Dim Result As String

    Randomize Timer

    For i = 1 To Length
        Result = Result & Chr(Int(Rnd(Timer) * 26 + 65 + Round(Rnd(Timer)) * 32))
    Next i

    GenerateRandomAlphaString = Result

End Function

Let me know if you have any problems with this; I've changed the context from a method to a function.

By the way, what version of IE are you using? I suspect you're on < IE8. If you upgrade to IE8 I presume it'll update shdocvw.dll to ieframe.dll and you will be able to use document.querySelector/All.

Edit

Comment response which isn't really a comment: Basically the way to do this in VBA is to traverse the child nodes. The problem is you don't get the correct return types. You could fix this by making your own classes that (separately) implement IHTMLElement and IHTMLElementCollection; but that's WAY too much of a pain for me to do it without getting paid :). If you're determined, go and read up on the Implements keyword for VB6/VBA.

Public Function getSubElementsByTagName(el As IHTMLElement, tagname As String) As Collection

    Dim descendants As New Collection
    Dim results As New Collection
    Dim i As Long

    getDescendants el, descendants

    For i = 1 To descendants.Count
        If descendants(i).tagname = tagname Then
            results.Add descendants(i)
        End If
    Next i

    getSubElementsByTagName = results

End Function

Public Function getDescendants(nd As IHTMLElement, ByRef descendants As Collection)
    Dim i As Long
    descendants.Add nd
    For i = 1 To nd.Children.Length
        getDescendants nd.Children.Item(i), descendants
    Next i
End Function

Access key value from Web.config in Razor View-MVC3 ASP.NET

@System.Configuration.ConfigurationManager.AppSettings["myKey"]

Run certain code every n seconds

import threading

def printit():
  threading.Timer(5.0, printit).start()
  print "Hello, World!"

printit()

# continue with the rest of your code

https://docs.python.org/3/library/threading.html#timer-objects

Why did a network-related or instance-specific error occur while establishing a connection to SQL Server?

I've resolved the issue. It was due to the SQL browser service.

Solution to such problem is one among below -

Check the spelling of the SQL Server instance name that is specified in the connection string.
Use the SQL Server Surface Area Configuration tool to enable SQL Server to accept remote connections over the TCP or named pipes protocols. For more information about the SQL Server Surface Area Configuration Tool, see Surface Area Configuration for Services and Connections.
Make sure that you have configured the firewall on the server instance of SQL Server to open ports for SQL Server and the SQL Server Browser port (UDP 1434).
Make sure that the SQL Server Browser service is started on the server.

link - http://www.microsoft.com/products/ee/transform.aspx?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=-1

How to modify the nodejs request default timeout time?

With the latest NodeJS you can experiment with this monkey patch:

const http = require("http");
const originalOnSocket = http.ClientRequest.prototype.onSocket;
require("http").ClientRequest.prototype.onSocket = function(socket) {
    const that = this;
    socket.setTimeout(this.timeout ? this.timeout : 3000);
    socket.on('timeout', function() {
        that.abort();
    });
    originalOnSocket.call(this, socket);
};

How to get the number of threads in a Java process

Useful tool for debugging java programs, it gives the number of threads and other relevant info on them:

jconsole <process-id>

Substitute multiple whitespace with single whitespace in Python

A regular expression can be used to offer more control over the whitespace characters that are combined.

To match unicode whitespace:

import re

_RE_COMBINE_WHITESPACE = re.compile(r"\s+")

my_str = _RE_COMBINE_WHITESPACE.sub(" ", my_str).strip()

To match ASCII whitespace only:

import re

_RE_COMBINE_WHITESPACE = re.compile(r"(?a:\s+)")
_RE_STRIP_WHITESPACE = re.compile(r"(?a:^\s+|\s+$)")

my_str = _RE_COMBINE_WHITESPACE.sub(" ", my_str)
my_str = _RE_STRIP_WHITESPACE.sub("", my_str)

Matching only ASCII whitespace is sometimes essential for keeping control characters such as x0b, x0c, x1c, x1d, x1e, x1f.

Reference:

About \s:

For Unicode (str) patterns: Matches Unicode whitespace characters (which includes [ \t\n\r\f\v], and also many other characters, for example the non-breaking spaces mandated by typography rules in many languages). If the ASCII flag is used, only [ \t\n\r\f\v] is matched.

About re.ASCII:

Make \w, \W, \b, \B, \d, \D, \s and \S perform ASCII-only matching instead of full Unicode matching. This is only meaningful for Unicode patterns, and is ignored for byte patterns. Corresponds to the inline flag (?a).

strip() will remote any leading and trailing whitespaces.

Passing an array/list into a Python function

Python lists (which are not just arrays because their size can be changed on the fly) are normal Python objects and can be passed in to functions as any variable. The * syntax is used for unpacking lists, which is probably not something you want to do now.

Global environment variables in a shell script

source myscript.sh is also feasible.

Description for linux command source:

source is a Unix command that evaluates the file following the command, 
as a list of commands, executed in the current context

How to rollback everything to previous commit

I searched for multiple options to get my git reset to specific commit, but most of them aren't so satisfactory.

I generally use this to reset the git to the specific commit in source tree.

select commit to reset on sourcetree.
In dropdowns select the active branch , first Parent Only
And right click on "Reset branch to this commit" and select hard reset option (soft, mixed and hard)
and then go to terminal git push -f

You should be all set!

How do I tell if an object is a Promise?

This is how graphql-js package detects promises:

function isPromise(value) {
  return Boolean(value && typeof value.then === 'function');
}

value is the returned value of your function. I'm using this code in my project and have no problem so far.

Javascript Uncaught Reference error Function is not defined

In JSFiddle, when you set the wrapping to "onLoad" or "onDomready", the functions you define are only defined inside that block, and cannot be accessed by outside event handlers.

Easiest fix is to change:

function something(...)

To:

window.something = function(...)

Get the Highlighted/Selected text

Use window.getSelection().toString().

You can read more on developer.mozilla.org

file_get_contents behind a proxy?

There's a similar post here: http://techpad.co.uk/content.php?sid=137 which explains how to do it.

function file_get_contents_proxy($url,$proxy){

    // Create context stream
    $context_array = array('http'=>array('proxy'=>$proxy,'request_fulluri'=>true));
    $context = stream_context_create($context_array);

    // Use context stream with file_get_contents
    $data = file_get_contents($url,false,$context);

    // Return data via proxy
    return $data;

}

make: *** No rule to make target `all'. Stop

Your makefile should ideally be named makefile, not make. Note that you can call your makefile anything you like, but as you found, you then need the -f option with make to specify the name of the makefile. Using the default name of makefile just makes life easier.

Difference between View and Request scope in managed beans

A @ViewScoped bean lives exactly as long as a JSF view. It usually starts with a fresh new GET request, or with a navigation action, and will then live as long as the enduser submits any POST form in the view to an action method which returns null or void (and thus navigates back to the same view). Once you refresh the page, or return a non-null string (even an empty string!) navigation outcome, then the view scope will end.

A @RequestScoped bean lives exactly as long a HTTP request. It will thus be garbaged by end of every request and recreated on every new request, hereby losing all changed properties.

A @ViewScoped bean is thus particularly more useful in rich Ajax-enabled views which needs to remember the (changed) view state across Ajax requests. A @RequestScoped one would be recreated on every Ajax request and thus fail to remember all changed view state. Note that a @ViewScoped bean does not share any data among different browser tabs/windows in the same session like as a @SessionScoped bean. Every view has its own unique @ViewScoped bean.

How can I access each element of a pair in a pair list?

When you say pair[0], that gives you ("a", 1). The thing in parentheses is a tuple, which, like a list, is a type of collection. So you can access the first element of that thing by specifying [0] or [1] after its name. So all you have to do to get the first element of the first element of pair is say pair[0][0]. Or if you want the second element of the third element, it's pair[2][1].

Exporting the values in List to excel

Using the CSV idea, if it's just a list of Strings. Assuming l is your list:

using System.IO;

using(StreamWriter sw = File.CreateText("list.csv"))
{
  for(int i = 0; i < l.Count; i++)
  {
    sw.WriteLine(l[i]);
  }
}

What is the difference between a symbolic link and a hard link?

Hard link Vs Soft link can be easily explained by this image.

integrating barcode scanner into php application?

You can use AJAX for that. Whenever you scan a barcode, your scanner will act as if it is a keyboard typing into your input type="text" components. With JavaScript, capture the corresponding event, and send HTTP REQUEST and process responses accordingly.

make a phone call click on a button

check permissions before (for android 6 and above):

if (ActivityCompat.checkSelfPermission(context, Manifest.permission.CALL_PHONE) ==
                            PackageManager.PERMISSION_GRANTED) 
   {

     context.startActivity(new Intent(Intent.ACTION_CALL, Uri.parse("tel:09130000000")));
   }

Wamp Server not goes to green color

CMD > netstat -ao > look for any line like 0.0.0.0:80 and look at the PID value (e.g. 4796)

Open Task Manager > Processes tab > View > Select Column > Tick on PID (Process Identifier) > OK to create new column

Look at the processes list in Task Manager > Sort by PID (the new column) and find the 4796 to know which program is using Port 80. Mine is Bit-Torrent. After close (exit) Bit-Torrent, Wampserver should work as usual.

How do I close a single buffer (out of many) in Vim?

Use:

:ls - to list buffers
:bd#n - to close buffer where #n is the buffer number (use ls to get it)

Examples:

to delete buffer 2:
```
:bd2
```

How to commit and rollback transaction in sql server?

Avoid direct references to '@@ERROR'. It's a flighty little thing that can be lost.

Declare @ErrorCode int;
... perform stuff ...
Set @ErrorCode = @@ERROR;
... other stuff ...
if @ErrorCode ......

How to extract base URL from a string in JavaScript?

Instead of having to account for window.location.protocol and window.location.origin, and possibly missing a specified port number, etc., just grab everything up to the 3rd "/":

// get nth occurrence of a character c in the calling string
String.prototype.nthIndex = function (n, c) {
    var index = -1;
    while (n-- > 0) {
        index++;
        if (this.substring(index) == "") return -1; // don't run off the end
        index += this.substring(index).indexOf(c);
    }
    return index;
}

// get the base URL of the current page by taking everything up to the third "/" in the URL
function getBaseURL() {
    return document.URL.substring(0, document.URL.nthIndex(3,"/") + 1);
}

How do I create a new line in Javascript?

\n --> newline character is not working for inserting a new line.

    str="Hello!!";
    document.write(str);
    document.write("\n");
    document.write(str);

But if we use below code then it works fine and it gives new line.

    document.write(str);
    document.write("<br>");
    document.write(str);

Note:: I tried in Visual Studio Code.

Invoke-Command error "Parameter set cannot be resolved using the specified named parameters"

Fairly new to using PowerShell, think I might be able to help. Could you try this?

I believe you're not getting the correct parameters to your script block:

param([string]$one, [string]$two)
$res = Invoke-Command -Credential $migratorCreds -ScriptBlock {Get-LocalUsers -parentNodeXML $args[0] -migratorUser $args[1] } -ArgumentList $xmlPRE, $migratorCreds

Email validation using jQuery

jQuery Function to Validate Email

I really don’t like to use plugins, especially when my form only has one field that needs to be validated. I use this function and call it whenever I need to validate an email form field.

 function validateEmail($email) {
  var emailReg = /^([\w-\.]+@([\w-]+\.)+[\w-]{2,4})?$/;
  return emailReg.test( $email );
}

and now to use this

if( !validateEmail(emailaddress)) { /* do stuff here */ }

Cheers!

Refresh (reload) a page once using jQuery?

You don't have a jQuery refresh function, because this is JavaScript basics.

Try this:

<body onload="if (location.href.indexOf('reload')==-1) location.replace(location.href+'?reload');">

Is there any way to change input type="date" format?

Try this if you need a quick solution To make yyyy-mm-dd go "dd- Sep -2016"

1) Create near your input one span class (act as label)

2) Update the label everytime your date is changed by user, or when need to load from data.

Works for webkit browser mobiles and pointer-events for IE11+ requires jQuery and Jquery Date

_x000D_

$("#date_input").on("change", function () {_x000D_
     $(this).css("color", "rgba(0,0,0,0)").siblings(".datepicker_label").css({ "text-align":"center", position: "absolute",left: "10px", top:"14px",width:$(this).width()}).text($(this).val().length == 0 ? "" : ($.datepicker.formatDate($(this).attr("dateformat"), new Date($(this).val()))));_x000D_
        });

_x000D_

#date_input{text-indent: -500px;height:25px; width:200px;}

_x000D_

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.2/jquery.min.js"></script>_x000D_
<script src="http://code.jquery.com/ui/1.9.2/jquery-ui.min.js"></script>_x000D_
<input id ="date_input" dateformat="d M y" type="date"/>_x000D_
<span class="datepicker_label" style="pointer-events: none;"></span>

_x000D_

How to get the size of a JavaScript object?

There is a NPM module to get object sizeof, you can install it with npm install object-sizeof

  var sizeof = require('object-sizeof');

  // 2B per character, 6 chars total => 12B
  console.log(sizeof({abc: 'def'}));

  // 8B for Number => 8B
  console.log(sizeof(12345));

  var param = { 
    'a': 1, 
    'b': 2, 
    'c': {
      'd': 4
    }
  };
  // 4 one two-bytes char strings and 3 eighth-bytes numbers => 32B
  console.log(sizeof(param));

How to get Javascript Select box's selected text

I know no-one is asking for a jQuery solution here, but might be worth mentioning that with jQuery you can just ask for:$('#selectorid').val()

ASP.NET document.getElementById('<%=Control.ClientID%>'); returns null

Gotcha!

You have to use RegisterStartupScript instead of RegisterClientScriptBlock

Here My Example.

MasterPage:

<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="MasterPage.master.cs"
    Inherits="prueba.MasterPage" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>

    <script type="text/javascript">

        function confirmCallBack() {
            var a = document.getElementById('<%= Page.Master.FindControl("ContentPlaceHolder1").FindControl("Button1").ClientID %>');

            alert(a.value);

        }

    </script>

    <asp:ContentPlaceHolder ID="head" runat="server">
    </asp:ContentPlaceHolder>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
        </asp:ContentPlaceHolder>
    </div>
    </form>
</body>
</html>

WebForm1.aspx

<%@ Page Title="" Language="C#" MasterPageFile="~/MasterPage.Master" AutoEventWireup="true"
    CodeBehind="WebForm1.aspx.cs" Inherits="prueba.WebForm1" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">

</asp:Content>

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
<asp:Button ID="Button1" runat="server" Text="Button" />
</asp:Content>

WebForm1.aspx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace prueba
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            ClientScript.RegisterStartupScript(this.GetType(), "js", "confirmCallBack();", true);

        }
    }
}

How do I save and restore multiple variables in python?

You could use klepto, which provides persistent caching to memory, disk, or database.

dude@hilbert>$ python
Python 2.7.6 (default, Nov 12 2013, 13:26:39) 
[GCC 4.2.1 Compatible Apple Clang 4.1 ((tags/Apple/clang-421.11.66))] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from klepto.archives import file_archive
>>> db = file_archive('foo.txt')
>>> db['1'] = 1
>>> db['max'] = max
>>> squared = lambda x: x**2
>>> db['squared'] = squared
>>> def add(x,y):
...   return x+y
... 
>>> db['add'] = add
>>> class Foo(object):
...   y = 1
...   def bar(self, x):
...     return self.y + x
... 
>>> db['Foo'] = Foo
>>> f = Foo()
>>> db['f'] = f  
>>> db.dump()
>>>

Then, after interpreter restart...

dude@hilbert>$ python
Python 2.7.6 (default, Nov 12 2013, 13:26:39) 
[GCC 4.2.1 Compatible Apple Clang 4.1 ((tags/Apple/clang-421.11.66))] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from klepto.archives import file_archive
>>> db = file_archive('foo.txt')
>>> db
file_archive('foo.txt', {}, cached=True)
>>> db.load()
>>> db
file_archive('foo.txt', {'1': 1, 'add': <function add at 0x10610a0c8>, 'f': <__main__.Foo object at 0x10510ced0>, 'max': <built-in function max>, 'Foo': <class '__main__.Foo'>, 'squared': <function <lambda> at 0x10610a1b8>}, cached=True)
>>> db['add'](2,3)
5
>>> db['squared'](3)
9
>>> db['f'].bar(4)
5
>>>

Get the code here: https://github.com/uqfoundation

iPhone UILabel text soft shadow

_nameLabel = [[UILabel alloc] initWithFrame:CGRectZero];
_nameLabel.font = [UIFont boldSystemFontOfSize:19.0f];
_nameLabel.textColor = [UIColor whiteColor];
_nameLabel.backgroundColor = [UIColor clearColor];
_nameLabel.shadowColor = [UIColor colorWithWhite:0 alpha:0.2];
_nameLabel.shadowOffset = CGSizeMake(0, 1);

i think you should use the [UIColor colorWithWhite:0 alpha:0.2] to set the alpha value.

What is difference between Axios and Fetch?

With fetch, we need to deal with two promises. With axios, we can directly access the JSON result inside the response object data property.

WampServer orange icon

PLEASE NOTE! If you have gone through all of the above, like "I" did, and still get the Orange icon, and, when you test Port 80 you get "Apache", look at the file: c:/wamp/bin/apache/apache2.4.9/conf/httpd.conf (your apache version number may differ).

In the file, about line # 62, you'll find a note saying to fill in this:

Listen 0.0.0.0:80 Listen [::0]:80

Why?

Change this to Listen on specific IP addresses as shown below to prevent Apache from glomming onto all bound IP addresses.

I changed that to match my localhost IP address and when I restarted Wamp, it quickly went from Red to Green. Success!...3 hours later....

Should I use `import os.path` or `import os`?

As per PEP-20 by Tim Peters, "Explicit is better than implicit" and "Readability counts". If all you need from the os module is under os.path, import os.path would be more explicit and let others know what you really care about.

Likewise, PEP-20 also says "Simple is better than complex", so if you also need stuff that resides under the more-general os umbrella, import os would be preferred.

JSON.Parse,'Uncaught SyntaxError: Unexpected token o

var jsonStringNoQuotes = [{"Id":"10","Name":"Matt"},{"Id":"1","Name":"Rock"}];

it will create json object. no need to parse.

jsonStringQuotes = "'" + jsonStringNoQuotes + "'";

will return '[object]'

thats why it(below) is causing error

var myData = JSON.parse(jsonStringQuotes);

How to make Java work with SQL Server?

If you are use sqljdbc4.jar, use the following code

ResultSet objResultSet = objPreparedStatement.getResultSet();
if (objResultSet == null) {
  boolean bResult = false;
  while (!bResult){
    if (objPreparedStatement.getMoreResults()){
      objResultSet = objPreparedStatement.getResultSet();
      bResult = true;
    }
  } 
}
objCachedRowSet = new CachedRowSetImpl();
objCachedRowSet.populate(objResultSet);
if (CommonUtility.isValidObject(objResultSet)) objResultSet.close();
objResultSet = null;

How to add a linked source folder in Android Studio?

Just in case anyone is interested, heres a complete Java module gradle file that correctly generates and references the built artefacts within an Android multi module application

buildscript {
    repositories {
        maven {
            url "https://plugins.gradle.org/m2/"
        }
    }
    dependencies {
        classpath "net.ltgt.gradle:gradle-apt-plugin:0.15"
    }
}

apply plugin: "net.ltgt.apt"
apply plugin: "java-library"
apply plugin: "idea"

idea {
    module {
        sourceDirs += file("$buildDir/generated/source/apt/main")
        testSourceDirs += file("$buildDir/generated/source/apt/test")
    }
}

dependencies {

    // Dagger 2 and Compiler
    compile "com.google.dagger:dagger:2.15"
    apt "com.google.dagger:dagger-compiler:2.15"
    compile "com.google.guava:guava:24.1-jre"

}

sourceCompatibility = "1.8"
targetCompatibility = "1.8"

How to let PHP to create subdomain automatically for each user?

You're looking to create a custom A record.

I'm pretty sure that you can use wildcards when specifying A records which would let you do something like this:

*.mywebsite.com       IN  A       127.0.0.1

127.0.0.1 would be the IP address of your webserver. The method of actually adding the record will depend on your host.

Doing it like http://mywebsite.com/user would be a lot easier to set up if it's an option.

Then you could just add a .htaccess file that looks like this:

Options +FollowSymLinks

RewriteEngine On
RewriteRule ^([aA-zZ])$  dostuff.php?username=$1

In the above, usernames are limited to the characters a-z

The rewrite rule for grabbing the subdomain would look like this:

RewriteCond %{HTTP_HOST} ^(^.*)\.mywebsite.com
RewriteRule (.*)  dostuff.php?username=%1

However, you don't really need any rewrite rules. The HTTP_HOST header is available in PHP as well, so you can get it already, like

$username = strtok($_SERVER['HTTP_HOST'], ".");

Get file version in PowerShell

I realise this has already been answered, but if anyone's interested in typing fewer characters, I believe this is the shortest way of writing this in PS v3+:

ls application.exe | % versioninfo

ls is an alias for Get-ChildItem
% is an alias for ForEach-Object
versioninfo here is a shorthand way of writing {$_.VersionInfo}

The benefit of using ls in this way is that you can easily adapt it to look for a given file within subfolders. For example, the following command will return version info for all files called application.exe within subfolders:

ls application.exe -r | % versioninfo

-r is an alias for -Recurse

You can further refine this by adding -ea silentlycontinue to ignore things like permission errors in folders you can't search:

ls application.exe -r -ea silentlycontinue | % versioninfo

-ea is an alias for -ErrorAction

Finally, if you are getting ellipses (...) in your results, you can append | fl to return the information in a different format. This returns much more detail, although formatted in a list, rather that on one line per result:

ls application.exe -r -ea silentlycontinue | % versioninfo | fl

fl is an alias for Format-List

I realise this is very similar to xcud's reply in that ls and dir are both aliases for Get-ChildItem. But I'm hoping my "shortest" method will help someone.

The final example could be written in long-hand in the following way:

Get-ChildItem -Filter application.exe -Recurse -ErrorAction SilentlyContinue | ForEach-Object {$_.VersionInfo} | Format-List

... but I think my way is cooler and, for some, easier to remember. (But mostly cooler).

Check if cookie exists else set cookie to Expire in 10 days

You need to read and write document.cookie

if (document.cookie.indexOf("visited=") >= 0) {
  // They've been here before.
  alert("hello again");
}
else {
  // set a new cookie
  expiry = new Date();
  expiry.setTime(expiry.getTime()+(10*60*1000)); // Ten minutes

  // Date()'s toGMTSting() method will format the date correctly for a cookie
  document.cookie = "visited=yes; expires=" + expiry.toGMTString();
  alert("this is your first time");
}

Create a function with optional call variables

Powershell provides a lot of built-in support for common parameter scenarios, including mandatory parameters, optional parameters, "switch" (aka flag) parameters, and "parameter sets."

By default, all parameters are optional. The most basic approach is to simply check each one for $null, then implement whatever logic you want from there. This is basically what you have already shown in your sample code.

If you want to learn about all of the special support that Powershell can give you, check out these links:

about_Functions

about_Functions_Advanced

about_Functions_Advanced_Parameters

What is the proper use of an EventEmitter?

TL;DR:

No, don't subscribe manually to them, don't use them in services. Use them as is shown in the documentation only to emit events in components. Don't defeat angular's abstraction.

Answer:

No, you should not subscribe manually to it.

EventEmitter is an angular2 abstraction and its only purpose is to emit events in components. Quoting a comment from Rob Wormald

[...] EventEmitter is really an Angular abstraction, and should be used pretty much only for emitting custom Events in components. Otherwise, just use Rx as if it was any other library.

This is stated really clear in EventEmitter's documentation.

Use by directives and components to emit custom Events.

What's wrong about using it?

Angular2 will never guarantee us that EventEmitter will continue being an Observable. So that means refactoring our code if it changes. The only API we must access is its emit() method. We should never subscribe manually to an EventEmitter.

All the stated above is more clear in this Ward Bell's comment (recommended to read the article, and the answer to that comment). Quoting for reference

Do NOT count on EventEmitter continuing to be an Observable!

Do NOT count on those Observable operators being there in the future!

These will be deprecated soon and probably removed before release.

Use EventEmitter only for event binding between a child and parent component. Do not subscribe to it. Do not call any of those methods. Only call eve.emit()

His comment is in line with Rob's comment long time ago.

So, how to use it properly?

Simply use it to emit events from your component. Take a look a the following example.

@Component({
    selector : 'child',
    template : `
        <button (click)="sendNotification()">Notify my parent!</button>
    `
})
class Child {
    @Output() notifyParent: EventEmitter<any> = new EventEmitter();
    sendNotification() {
        this.notifyParent.emit('Some value to send to the parent');
    }
}

@Component({
    selector : 'parent',
    template : `
        <child (notifyParent)="getNotification($event)"></child>
    `
})
class Parent {
    getNotification(evt) {
        // Do something with the notification (evt) sent by the child!
    }
}

How not to use it?

class MyService {
    @Output() myServiceEvent : EventEmitter<any> = new EventEmitter();
}

Stop right there... you're already wrong...

Hopefully these two simple examples will clarify EventEmitter's proper usage.

LINQ to SQL Left Outer Join

You don't need the into statements:

var query = 
    from customer in dc.Customers
    from order in dc.Orders
         .Where(o => customer.CustomerId == o.CustomerId)
         .DefaultIfEmpty()
    select new { Customer = customer, Order = order } 
    //Order will be null if the left join is null

And yes, the query above does indeed create a LEFT OUTER join.

Link to a similar question that handles multiple left joins: Linq to Sql: Multiple left outer joins

Build Step Progress Bar (css and jquery)

What I would do is use the same trick often use for hovering on buttons. Prepare an image that has 2 parts: (1) a top half which is greyed out, meaning incomplete, and (2) a bottom half which is colored in, meaning completed. Use the same image 4 times to make up the 4 steps of the progress bar, and align top for incomplete steps, and align bottom for incomplete steps.

In order to take advantage of image alignment, you'd have to use the image as the background for 4 divs, rather than using the img element.

This is the CSS for background image alignment:

div.progress-incomplete {
  background-position: top;
}
div.progress-finished {
  background-position: bottom;
}

How to stop/terminate a python script from running?

you can also use the Activity Monitor to stop the py process

jquery how to catch enter key and change event to tab

This is at last what is working for me perfectly. I am using jqeasyui and it is working fine

$(document).on('keyup', 'input', function(e) {
 if(e.keyCode == 13 && e.target.type        !== 'submit') {
   var inputs =   $(e.target).parents("form").eq(0).find(":input:visible"),
   idx = inputs.index(e.target);
       if (idx == inputs.length - 1) {
          inputs[0].select()
       } else {
          inputs[idx + 1].focus();
          inputs[idx + 1].select();
       }
 }

});

Difference Between ViewResult() and ActionResult()

ViewResult is a subclass of ActionResult. The View method returns a ViewResult. So really these two code snippets do the exact same thing. The only difference is that with the ActionResult one, your controller isn't promising to return a view - you could change the method body to conditionally return a RedirectResult or something else without changing the method definition.

How to get thread id of a pthread in linux c program?

pid_t tid = syscall(SYS_gettid);

Linux provides such system call to allow you get id of a thread.

moving changed files to another branch for check-in

Sadly this happens to me quite regularly as well and I use git stash if I realized my mistake before git commit and use git cherry-pick otherwise, both commands are explained pretty well in other answers

I want to add a clarification for git checkout targetBranch: this command will only preserve your working directory and staged snapshot if targetBranch has the same history as your current branch

If you haven't already committed your changes, just use git checkout to move to the new branch and then commit them normally

@Amber's statement is not false, when you move to a newBranch,git checkout -b newBranch, a new pointer is created and it is pointing to the exact same commit as your current branch.
In fact, if you happened to have an another branch that shares history with your current branch (both point at the same commit) you can "move your changes" by git checkout targetBranch

However, usually different branches means different history, and Git will not allow you to switch between these branches with a dirty working directory or staging area. in which case you can either do git checkout -f targetBranch (clean and throwaway changes) or git stage + git checkout targetBranch (clean and save changes), simply running git checkout targetBranch will give an error:

error: Your local changes to the following files would be overwritten by checkout: ... Please commit your changes or stash them before you switch branches. Aborting

Illegal mix of collations error in MySql

In short, this error is caused by MySQL trying to do an operation on two things which have different collation settings. If you make the settings match, the error will go away. Of course, you need to choose the right setting for your database, depending on what it is going to be used for.

Here's some good advice on choosing between two very common utf8 collations: What's the difference between utf8_general_ci and utf8_unicode_ci

If you are using phpMyAdmin you can do this systematically by working through the tables mentioned in your error message, and checking the collation type for each column. First you should check which is the overall collation setting for your database - phpMyAdmin can tell you this and change it if necessary. But each column in each table can have its own setting. Normally you will want all these to match.

In a small database this is easy enough to do by hand, and in any case if you read the error message in full it will usually point you to the right place. Don't forget to look at the 'structure' settings for columns with subtables in as well. When you find a collation that does not match you can change it using phpMyAdmin directly, no need to use the query window. Then try your operation again. If the error persists, keep looking!

How to copy directories with spaces in the name

After some trial and error and observing the results (in other words, I hacked it), I got it to work.

Quotes ARE required to use a path name with spaces. The trick is there MUST be a space after the path names before the closing quote...like this...

robocopy "C:\Source Path " "C:\Destination Path " /option1 /option2...

This almost seems like a bug and certainly not very intuitive.

Todd K.

How to create a temporary table in SSIS control flow task and then use it in data flow task?

Solution:

Set the property RetainSameConnection on the Connection Manager to True so that temporary table created in one Control Flow task can be retained in another task.

Here is a sample SSIS package written in SSIS 2008 R2 that illustrates using temporary tables.

Walkthrough:

Create a stored procedure that will create a temporary table named ##tmpStateProvince and populate with few records. The sample SSIS package will first call the stored procedure and then will fetch the temporary table data to populate the records into another database table. The sample package will use the database named Sora Use the below create stored procedure script.

USE Sora;
GO

CREATE PROCEDURE dbo.PopulateTempTable
AS
BEGIN
    
    SET NOCOUNT ON;

    IF OBJECT_ID('TempDB..##tmpStateProvince') IS NOT NULL
        DROP TABLE ##tmpStateProvince;

    CREATE TABLE ##tmpStateProvince
    (
            CountryCode     nvarchar(3)         NOT NULL
        ,   StateCode       nvarchar(3)         NOT NULL
        ,   Name            nvarchar(30)        NOT NULL
    );

    INSERT INTO ##tmpStateProvince 
        (CountryCode, StateCode, Name)
    VALUES
        ('CA', 'AB', 'Alberta'),
        ('US', 'CA', 'California'),
        ('DE', 'HH', 'Hamburg'),
        ('FR', '86', 'Vienne'),
        ('AU', 'SA', 'South Australia'),
        ('VI', 'VI', 'Virgin Islands');
END
GO

Create a table named dbo.StateProvince that will be used as the destination table to populate the records from temporary table. Use the below create table script to create the destination table.

USE Sora;
GO

CREATE TABLE dbo.StateProvince
(
        StateProvinceID int IDENTITY(1,1)   NOT NULL
    ,   CountryCode     nvarchar(3)         NOT NULL
    ,   StateCode       nvarchar(3)         NOT NULL
    ,   Name            nvarchar(30)        NOT NULL
    CONSTRAINT [PK_StateProvinceID] PRIMARY KEY CLUSTERED
        ([StateProvinceID] ASC)
) ON [PRIMARY];
GO

Create an SSIS package using Business Intelligence Development Studio (BIDS). Right-click on the Connection Managers tab at the bottom of the package and click New OLE DB Connection... to create a new connection to access SQL Server 2008 R2 database.

Connection Managers - New OLE DB Connection

Click New... on Configure OLE DB Connection Manager.

Configure OLE DB Connection Manager - New

Perform the following actions on the Connection Manager dialog.

Select Native OLE DB\SQL Server Native Client 10.0 from Provider since the package will connect to SQL Server 2008 R2 database
Enter the Server name, like MACHINENAME\INSTANCE
Select Use Windows Authentication from Log on to the server section or whichever you prefer.
Select the database from Select or enter a database name, the sample uses the database name Sora.
Click Test Connection
Click OK on the Test connection succeeded message.
Click OK on Connection Manager

Connection Manager

The newly created data connection will appear on Configure OLE DB Connection Manager. Click OK.

Configure OLE DB Connection Manager - Created

OLE DB connection manager KIWI\SQLSERVER2008R2.Sora will appear under the Connection Manager tab at the bottom of the package. Right-click the connection manager and click Properties

Connection Manager Properties

Set the property RetainSameConnection on the connection KIWI\SQLSERVER2008R2.Sora to the value True.

RetainSameConnection Property on Connection Manager

Right-click anywhere inside the package and then click Variables to view the variables pane. Create the following variables.

A new variable named PopulateTempTable of data type String in the package scope SO_5631010 and set the variable with the value EXEC dbo.PopulateTempTable.
A new variable named FetchTempData of data type String in the package scope SO_5631010 and set the variable with the value SELECT CountryCode, StateCode, Name FROM ##tmpStateProvince

Variables

Drag and drop an Execute SQL Task on to the Control Flow tab. Double-click the Execute SQL Task to view the Execute SQL Task Editor.

On the General page of the Execute SQL Task Editor, perform the following actions.

Set the Name to Create and populate temp table
Set the Connection Type to OLE DB
Set the Connection to KIWI\SQLSERVER2008R2.Sora
Select Variable from SQLSourceType
Select User::PopulateTempTable from SourceVariable
Click OK

Execute SQL Task Editor

Drag and drop a Data Flow Task onto the Control Flow tab. Rename the Data Flow Task as Transfer temp data to database table. Connect the green arrow from the Execute SQL Task to the Data Flow Task.

Control Flow Tab

Double-click the Data Flow Task to switch to Data Flow tab. Drag and drop an OLE DB Source onto the Data Flow tab. Double-click OLE DB Source to view the OLE DB Source Editor.

On the Connection Manager page of the OLE DB Source Editor, perform the following actions.

Select KIWI\SQLSERVER2008R2.Sora from OLE DB Connection Manager
Select SQL command from variable from Data access mode
Select User::FetchTempData from Variable name
Click Columns page

OLE DB Source Editor - Connection Manager

Clicking Columns page on OLE DB Source Editor will display the following error because the table ##tmpStateProvince specified in the source command variable does not exist and SSIS is unable to read the column definition.

Error message

To fix the error, execute the statement EXEC dbo.PopulateTempTable using SQL Server Management Studio (SSMS) on the database Sora so that the stored procedure will create the temporary table. After executing the stored procedure, click Columns page on OLE DB Source Editor, you will see the column information. Click OK.

OLE DB Source Editor - Columns

Drag and drop OLE DB Destination onto the Data Flow tab. Connect the green arrow from OLE DB Source to OLE DB Destination. Double-click OLE DB Destination to open OLE DB Destination Editor.

On the Connection Manager page of the OLE DB Destination Editor, perform the following actions.

Select KIWI\SQLSERVER2008R2.Sora from OLE DB Connection Manager
Select Table or view - fast load from Data access mode
Select [dbo].[StateProvince] from Name of the table or the view
Click Mappings page

OLE DB Destination Editor - Connection Manager

Click Mappings page on the OLE DB Destination Editor would automatically map the columns if the input and output column names are same. Click OK. Column StateProvinceID does not have a matching input column and it is defined as an IDENTITY column in database. Hence, no mapping is required.

OLE DB Destination Editor - Mappings

Data Flow tab should look something like this after configuring all the components.

Data Flow tab

Click the OLE DB Source on Data Flow tab and press F4 to view Properties. Set the property ValidateExternalMetadata to False so that SSIS would not try to check for the existence of the temporary table during validation phase of the package execution.

Set ValidateExternalMetadata

Execute the query select * from dbo.StateProvince in the SQL Server Management Studio (SSMS) to find the number of rows in the table. It should be empty before executing the package.

Rows in table before package execution

Execute the package. Control Flow shows successful execution.

Package Execution - Control Flow tab

In Data Flow tab, you will notice that the package successfully processed 6 rows. The stored procedure created early in this posted inserted 6 rows into the temporary table.

Package Execution - Data Flow tab

Execute the query select * from dbo.StateProvince in the SQL Server Management Studio (SSMS) to find the 6 rows successfully inserted into the table. The data should match with rows founds in the stored procedure.

Rows in table after package execution

The above example illustrated how to create and use temporary table within a package.

Meaning of Open hashing and Closed hashing

The name open addressing refers to the fact that the location ("address") of the element is not determined by its hash value. (This method is also called closed hashing).

In separate chaining, each bucket is independent, and has some sort of ADT (list, binary search trees, etc) of entries with the same index. In a good hash table, each bucket has zero or one entries, because we need operations of order O(1) for insert, search, etc.

This is a example of separate chaining using C++ with a simple hash function using mod operator (clearly, a bad hash function)

iOS: set font size of UILabel Programmatically

If you are looking for swift code:

var titleLabel = UILabel()
titleLabel.font = UIFont(name: "HelveticaNeue-UltraLight",
                         size: 20.0)

@Scope("prototype") bean scope not creating new bean

As mentioned by nicholas.hauschild injecting Spring context is not a good idea. In your case, @Scope("request") is enough to fix it. But let say you need several instances of LoginAction in controller method. In this case, I would recommend to create the bean of Supplier (Spring 4 solution):

    @Bean
    public Supplier<LoginAction> loginActionSupplier(LoginAction loginAction){
        return () -> loginAction;
    }

Then inject it into controller:

@Controller
public class HomeController {
    @Autowired
    private  Supplier<LoginAction> loginActionSupplier;

Insert data through ajax into mysql database

ajax:

$(document).on('click','#mv_secure_page',function(e) {
    var data = $("#m_form1").serialize();
    $.ajax({
        data: data,
        type: "post",
        url: "adapter.php",
        success: function(data){
        alert("Data: " + data);
        }
    });
});

php code:

<?php
/**
 * Created by PhpStorm.
 * User: Engg Amjad
 * Date: 11/9/16
 * Time: 1:28 PM
 */


if(isset($_REQUEST)){
    include_once('inc/system.php');

    $full_name=$_POST['full_name'];
    $business_name=$_POST['business_name'];
    $email=$_POST['email'];
    $phone=$_POST['phone'];
    $message=$_POST['message'];

    $sql="INSERT INTO mars (f_n,b_n,em,p_n,msg) values('$full_name','$business_name','$email','$phone','$message') ";

    $sql_result=mysqli_query($con,$sql);
    if($sql_result){
       echo "inserted successfully";
    }else{
        echo "Query failed".mysqli_error($con);
    }
}
?>

File.Move Does Not Work - File Already Exists

If file really exists and you want to replace it use below code:

string file = "c:\test\SomeFile.txt"
string moveTo = "c:\test\test\SomeFile.txt"

if (File.Exists(moveTo))
{
    File.Delete(moveTo);
}

File.Move(file, moveTo);

Aligning text and image on UIButton with imageEdgeInsets and titleEdgeInsets

The swift 4.2 version of solution would be the following:

let spacing: CGFloat = 10 // the amount of spacing to appear between image and title
self.button?.imageEdgeInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: spacing)
self.button?.titleEdgeInsets = UIEdgeInsets(top: 0, left: spacing, bottom: 0, right: 0)

Permission denied error on Github Push

Another way to get this error, is if you have duplicate or conflicting ~/.ssh/* entries. First check what is on your ssh key-chain with:

$ ssh-add -l
2048 SHA256:<hash1> [email protected] (RSA)
2048 SHA256:<hash2> [email protected] (RSA)
2048 SHA256:<hash3> [email protected] (RSA)

As you can see there are two emails which are the same, and easy for you to get confused. Then check your config file:

$ cat ~/.ssh/config

# GitHub: [email protected]
Host github_ex
 HostName github.com
 PreferredAuthentications publickey
 IdentityFile ~/.ssh/github_ex

# GitHub: [email protected]
Host github
 HostName github.com
 PreferredAuthentications publickey
 IdentityFile ~/.ssh/github

# Bitbucket: [email protected]
Host bitbucket
 HostName bitbucket.org
 PreferredAuthentications publickey
 IdentityFile ~/.ssh/bitbuc

Here you see that you have two different email accounts to github but same HostName. Someone is bound to get confused, including your git.

To resolve, manually remove (after copying) the (default) files:

cd ~/.ssh
rm id_rsa
rm id_rsa.pub

Now copy back the one you want to use, for example Host github:

cp -a github id_rsa
cp -a github.pub id_rsa.pub

Then try again.

For some reason, removing keys with ssh-add -d id_rsa didn't work as expected, as it seem that key-chain is cached.

Untrack files from git temporarily

Not an answer to the original question. But this might help someone.

To see the changes you have done (know which files are marked as --assume-unchanged)

git ls-files -v

The resulted list of files will have a prefix with one character (ex : H or h) If it is a lowercase (i.e. h) then the file was marked --assume-unchanged

How to show first commit by 'git log'?

git log --format="%h" | tail -1 gives you the commit hash (ie 0dd89fb), which you can feed into other commands, by doing something like

git diff `git log --format="%h" --after="1 day"| tail -1`..HEAD to view all the commits in the last day.

Your CPU supports instructions that this TensorFlow binary was not compiled to use: AVX AVX2

What is this warning about?

Modern CPUs provide a lot of low-level instructions, besides the usual arithmetic and logic, known as extensions, e.g. SSE2, SSE4, AVX, etc. From the Wikipedia:

Advanced Vector Extensions (AVX) are extensions to the x86 instruction set architecture for microprocessors from Intel and AMD proposed by Intel in March 2008 and first supported by Intel with the Sandy Bridge processor shipping in Q1 2011 and later on by AMD with the Bulldozer processor shipping in Q3 2011. AVX provides new features, new instructions and a new coding scheme.

In particular, AVX introduces fused multiply-accumulate (FMA) operations, which speed up linear algebra computation, namely dot-product, matrix multiply, convolution, etc. Almost every machine-learning training involves a great deal of these operations, hence will be faster on a CPU that supports AVX and FMA (up to 300%). The warning states that your CPU does support AVX (hooray!).

I'd like to stress here: it's all about CPU only.

Why isn't it used then?

Because tensorflow default distribution is built without CPU extensions, such as SSE4.1, SSE4.2, AVX, AVX2, FMA, etc. The default builds (ones from pip install tensorflow) are intended to be compatible with as many CPUs as possible. Another argument is that even with these extensions CPU is a lot slower than a GPU, and it's expected for medium- and large-scale machine-learning training to be performed on a GPU.

What should you do?

If you have a GPU, you shouldn't care about AVX support, because most expensive ops will be dispatched on a GPU device (unless explicitly set not to). In this case, you can simply ignore this warning by

# Just disables the warning, doesn't take advantage of AVX/FMA to run faster
import os
os.environ['TF_CPP_MIN_LOG_LEVEL'] = '2'

... or by setting export TF_CPP_MIN_LOG_LEVEL=2 if you're on Unix. Tensorflow is working fine anyway, but you won't see these annoying warnings.

If you don't have a GPU and want to utilize CPU as much as possible, you should build tensorflow from the source optimized for your CPU with AVX, AVX2, and FMA enabled if your CPU supports them. It's been discussed in this question and also this GitHub issue. Tensorflow uses an ad-hoc build system called bazel and building it is not that trivial, but is certainly doable. After this, not only will the warning disappear, tensorflow performance should also improve.

SQL GROUP BY CASE statement with aggregate function

If you are grouping by some other value, then instead of what you have,

write it as

Sum(CASE WHEN col1 > col2 THEN SUM(col3*col4) ELSE 0 END) as SumSomeProduct

If, otoh, you want to group By the internal expression, (col3*col4) then

write the group By to match the expression w/o the SUM...

Select Sum(Case When col1 > col2 Then col3*col4 Else 0 End) as SumSomeProduct
From ...

Group By Case When col1 > col2 Then col3*col4 Else 0 End

Finally, if you want to group By the actual aggregate

Select SumSomeProduct, Count(*), <other aggregate functions>
From (Select <other columns you are grouping By>, 
      Sum(Case When col1 > col2 
          Then col3*col4 Else 0 End) as SumSomeProduct
      From Table
      Group By <Other Columns> ) As Z
Group by SumSomeProduct

Execute php file from another php

It's trying to run it as a shell script, which interprets your <?php token as bash, which is a syntax error. Just use include() or one of its friends:

For example, in a.php put:

<?php
print "one";
include 'b.php';
print "three";
?>

In b.php put:

<?php
print "two";
?>

Prints:

eric@dev ~ $ php a.php
onetwothree

git rebase fatal: Needed a single revision

I ran into this and realized I didn't fetch the upstream before trying to rebase. All I needed was to git fetch upstream

Error: No Firebase App '[DEFAULT]' has been created - call Firebase App.initializeApp()

If you are starting out a react-native app and seeing this issue, then you have to follow all the instructions listed in firebase (when you setup iOS/android app) or the instructions @ React-native google auth android DEVELOPER_ERROR Code 10 question

Subclipse svn:ignore

One more thing... If you already ignored those files through Eclipse (with Team -> Ignored resources) you have to undo these settings so the files are controlled by Subclipse again and "Add to svn:ignore" option reappears

How to display a range input slider vertically

Without changing the position to absolute, see below. This supports all recent browsers as well.

_x000D_

.vranger {_x000D_
  margin-top: 50px;_x000D_
   transform: rotate(270deg);_x000D_
  -moz-transform: rotate(270deg); /*do same for other browsers if required*/_x000D_
}

_x000D_

<input type="range" class="vranger"/>

_x000D_

for very old browsers, you can use -sand-transform: rotate(10deg); from CSS sandpaper

or use

prefix selector such as -ms-transform: rotate(270deg); for IE9

Is mongodb running?

You can use the below command, to check MongoDB status, e.g: sudo service MongoDB status which displays the status of MongoDB service as like the screenshot:

MongoDB status

Static variables in C++

Excuse me when I answer your questions out-of-order, it makes it easier to understand this way.

When static variable is declared in a header file is its scope limited to .h file or across all units.

There is no such thing as a "header file scope". The header file gets included into source files. The translation unit is the source file including the text from the header files. Whatever you write in a header file gets copied into each including source file.

As such, a static variable declared in a header file is like a static variable in each individual source file.

Since declaring a variable static this way means internal linkage, every translation unit #includeing your header file gets its own, individual variable (which is not visible outside your translation unit). This is usually not what you want.

I would like to know what is the difference between static variables in a header file vs declared in a class.

In a class declaration, static means that all instances of the class share this member variable; i.e., you might have hundreds of objects of this type, but whenever one of these objects refers to the static (or "class") variable, it's the same value for all objects. You could think of it as a "class global".

Also generally static variable is initialized in .cpp file when declared in a class right ?

Yes, one (and only one) translation unit must initialize the class variable.

So that does mean static variable scope is limited to 2 compilation units ?

As I said:

A header is not a compilation unit,
static means completely different things depending on context.

Global static limits scope to the translation unit. Class static means global to all instances.

I hope this helps.

PS: Check the last paragraph of Chubsdad's answer, about how you shouldn't use static in C++ for indicating internal linkage, but anonymous namespaces. (Because he's right. ;-) )

Jquery onclick on div

May the div with id="content" not be created when this event is attached? You can try live() jquery method.

Else there may be multiple divs with the same id or you just spelled it wrong, it happens...

how do I insert a column at a specific column index in pandas?

You could try to extract columns as list, massage this as you want, and reindex your dataframe:

>>> cols = df.columns.tolist()
>>> cols = [cols[-1]]+cols[:-1] # or whatever change you need
>>> df.reindex(columns=cols)

   n  l  v
0  0  a  1
1  0  b  2
2  0  c  1
3  0  d  2

EDIT: this can be done in one line ; however, this looks a bit ugly. Maybe some cleaner proposal may come...

>>> df.reindex(columns=['n']+df.columns[:-1].tolist())

   n  l  v
0  0  a  1
1  0  b  2
2  0  c  1
3  0  d  2

Populating a data frame in R in a loop

Thanks Notable1, works for me with the tidytextr Create a dataframe with the name of files in one column and content in other.

    diretorio <- "D:/base"
    arquivos <- list.files(diretorio, pattern = "*.PDF")
    quantidade <- length(arquivos)

#
df = NULL
for (k in 1:quantidade) {

      nome = arquivos[k]
      print(nome)
      Sys.sleep(1) 
      dados = read_pdf(arquivos[k],ocr = T)
      print(dados)
      Sys.sleep(1)
      df = rbind(df, data.frame(nome,dados))
      Sys.sleep(1)
}
Encoding(df$text) <- "UTF-8"

How to download a file with Node.js (without using third-party libraries)?

Using the http2 Module

I saw answers using the http, https, and request modules. I'd like to add one using yet another native NodeJS module that supports either the http or https protocol:

Solution

I've referenced the official NodeJS API, as well as some of the other answers on this question for something I'm doing. The following was the test I wrote to try it out, which worked as intended:

import * as fs from 'fs';
import * as _path from 'path';
import * as http2 from 'http2';

/* ... */

async function download( host, query, destination )
{
    return new Promise
    (
        ( resolve, reject ) =>
        {
            // Connect to client:
            const client = http2.connect( host );
            client.on( 'error', error => reject( error ) );

            // Prepare a write stream:
            const fullPath = _path.join( fs.realPathSync( '.' ), destination );
            const file = fs.createWriteStream( fullPath, { flags: "wx" } );
            file.on( 'error', error => reject( error ) );

            // Create a request:
            const request = client.request( { [':path']: query } );

            // On initial response handle non-success (!== 200) status error:
            request.on
            (
                'response',
                ( headers/*, flags*/ ) =>
                {
                    if( headers[':status'] !== 200 )
                    {
                        file.close();
                        fs.unlink( fullPath, () => {} );
                        reject( new Error( `Server responded with ${headers[':status']}` ) );
                    }
                }
            );

            // Set encoding for the payload:
            request.setEncoding( 'utf8' );

            // Write the payload to file:
            request.on( 'data', chunk => file.write( chunk ) );

            // Handle ending the request
            request.on
            (
                'end',
                () =>
                {
                    file.close();
                    client.close();
                    resolve( { result: true } );
                }
            );

            /* 
                You can use request.setTimeout( 12000, () => {} ) for aborting
                after period of inactivity
            */

            // Fire off [flush] the request:
            request.end();
        }
    );
}

Then, for example:

/* ... */

let downloaded = await download( 'https://gitlab.com', '/api/v4/...', 'tmp/tmpFile' );

if( downloaded.result )
{
    // Success!
}

// ...

External References

EDIT Information

The solution was written for typescript, the function a class method - but with out noting this the solution would not have worked for the presumed javascript user with out proper use of the function declaration, which our contributor has so promptly added. Thanks!

How to automatically generate N "distinct" colors?

Here's an idea. Imagine an HSV cylinder

Define the upper and lower limits you want for the Brightness and Saturation. This defines a square cross section ring within the space.

Now, scatter N points randomly within this space.

Then apply an iterative repulsion algorithm on them, either for a fixed number of iterations, or until the points stabilise.

Now you should have N points representing N colours that are about as different as possible within the colour space you're interested in.

Hugo

Could not load file or assembly for Oracle.DataAccess in .NET

In my case the error states that the assemly

Oracle.DataAccess, Version=2.112.3.0, Culture=neutral, PublicKeyToken=89b483f429c47342

is missing.

When I run gacutil.exe /l 'Oracle.DataAccess' the result was:

The Global Assembly Cache contains the following assemblies:
Oracle.DataAccess, Version=2.112.1.0, Culture=neutral, PublicKeyToken=89b483f429c47342, processorArchitecture=x86

Number of items = 1

At this moment I have just installed the oracle client: win32_11gR2_client

Then I installed oracle developer tools ODTwithODAC112030_deleloper_tool

Now gacutil is saying:

The Global Assembly Cache contains the following assemblies:
Oracle.DataAccess, Version=2.112.1.0, Culture=neutral, PublicKeyToken=89b483f429c47342, processorArchitecture=x86
Oracle.DataAccess, Version=2.112.3.0, Culture=neutral, PublicKeyToken=89b483f429c47342, processorArchitecture=x86

Number of items = 2

Fixed, one totally missing assembly case

How to format code in Xcode?

Key combination to format all text on open file:

Cmd ? A + Ctrl I

Why declare unicode by string in python?

That doesn't set the format of the string; it sets the format of the file. Even with that header, "hello" is a byte string, not a Unicode string. To make it Unicode, you're going to have to use u"hello" everywhere. The header is just a hint of what format to use when reading the .py file.

The CodeDom provider type "Microsoft.CodeDom.Providers.DotNetCompilerPlatform.CSharpCodeProvider" could not be located

If you see this probably you are building in release mode. For production you should publish instead of building in release mode. For local development build in debug mode.

Multiple variables in a 'with' statement?

Note that if you split the variables into lines, you must use backslashes to wrap the newlines.

with A() as a, \
     B() as b, \
     C() as c:
    doSomething(a,b,c)

Parentheses don't work, since Python creates a tuple instead.

with (A(),
      B(),
      C()):
    doSomething(a,b,c)

Since tuples lack a __enter__ attribute, you get an error (undescriptive and does not identify class type):

AttributeError: __enter__

If you try to use as within parentheses, Python catches the mistake at parse time:

with (A() as a,
      B() as b,
      C() as c):
    doSomething(a,b,c)

SyntaxError: invalid syntax

When will this be fixed?

This issue is tracked in https://bugs.python.org/issue12782.

Recently, Python announced in PEP 617 that they'll be replacing the current parser with a new one. Because Python's current parser is LL(1), it cannot distinguish between "multiple context managers" with (A(), B()): and "tuple of values" with (A(), B())[0]:.

The new parser can properly parse "multiple context managers" surrounded by tuples. The new parser will be enabled in 3.9, but this syntax will still be rejected until the old parser is removed in Python 3.10.

Regular Expression to match valid dates

To control a date validity under the following format :

YYYY/MM/DD or YYYY-MM-DD

I would recommand you tu use the following regular expression :

(((19|20)([2468][048]|[13579][26]|0[48])|2000)[/-]02[/-]29|((19|20)[0-9]{2}[/-](0[4678]|1[02])[/-](0[1-9]|[12][0-9]|30)|(19|20)[0-9]{2}[/-](0[1359]|11)[/-](0[1-9]|[12][0-9]|3[01])|(19|20)[0-9]{2}[/-]02[/-](0[1-9]|1[0-9]|2[0-8])))

Matches

2016-02-29 | 2012-04-30 | 2019/09/31

Non-Matches

2016-02-30 | 2012-04-31 | 2019/09/35

You can customise it if you wants to allow only '/' or '-' separators. This RegEx strictly controls the validity of the date and verify 28,30 and 31 days months, even leap years with 29/02 month.

Try it, it works very well and prevent your code from lot of bugs !

FYI : I made a variant for the SQL datetime. You'll find it there (look for my name) : Regular Expression to validate a timestamp

Feedback are welcomed :)

How to make pylab.savefig() save image for 'maximized' window instead of default size

There are two major options in matplotlib (pylab) to control the image size:

You can set the size of the resulting image in inches
You can define the DPI (dots per inch) for output file (basically, it is a resolution)

Normally, you would like to do both, because this way you will have full control over the resulting image size in pixels. For example, if you want to render exactly 800x600 image, you can use DPI=100, and set the size as 8 x 6 in inches:

import matplotlib.pyplot as plt
# plot whatever you need...
# now, before saving to file:
figure = plt.gcf() # get current figure
figure.set_size_inches(8, 6)
# when saving, specify the DPI
plt.savefig("myplot.png", dpi = 100)

One can use any DPI. In fact, you might want to play with various DPI and size values to get the result you like the most. Beware, however, that using very small DPI is not a good idea, because matplotlib may not find a good font to render legend and other text. For example, you cannot set the DPI=1, because there are no fonts with characters rendered with 1 pixel :)

From other comments I understood that other issue you have is proper text rendering. For this, you can also change the font size. For example, you may use 6 pixels per character, instead of 12 pixels per character used by default (effectively, making all text twice smaller).

import matplotlib
#...
matplotlib.rc('font', size=6)

Finally, some references to the original documentation: http://matplotlib.sourceforge.net/api/pyplot_api.html#matplotlib.pyplot.savefig, http://matplotlib.sourceforge.net/api/pyplot_api.html#matplotlib.pyplot.gcf, http://matplotlib.sourceforge.net/api/figure_api.html#matplotlib.figure.Figure.set_size_inches, http://matplotlib.sourceforge.net/users/customizing.html#dynamic-rc-settings

P.S. Sorry, I didn't use pylab, but as far as I'm aware, all the code above will work same way in pylab - just replace plt in my code with the pylab (or whatever name you assigned when importing pylab). Same for matplotlib - use pylab instead.

Difference in System. exit(0) , System.exit(-1), System.exit(1 ) in Java

A good gotcha is any error code > 255 will be converted to error code % 256. One should be specifically careful about this if they are using a custom error code > 255 and expecting the exact error code in the application logic. http://www.tldp.org/LDP/abs/html/exitcodes.html

Count number of cells with any value (string or number) in a column in Google Docs Spreadsheet

The SUBTOTAL function can be used if you want to get the count respecting any filters you use on the page.

=SUBTOTAL(103, A1:A200)

will help you get count of non-empty rows, respecting filters.

103 - is similar to COUNTA, but ignores empty rows and also respects filters.

Reference : SUBTOTAL function

Javascript/DOM: How to remove all events of a DOM object?

May be the browser will do it for you if you do something like:

Copy the div and its attributes and insert it before the old one, then move the content from the old to the new and delete the old?

How do I get the classes of all columns in a data frame?

One option is to use lapply and class. For example:

> foo <- data.frame(c("a", "b"), c(1, 2))
> names(foo) <- c("SomeFactor", "SomeNumeric")
> lapply(foo, class)
$SomeFactor
[1] "factor"

$SomeNumeric
[1] "numeric"

Another option is str:

> str(foo)
'data.frame':   2 obs. of  2 variables:
 $ SomeFactor : Factor w/ 2 levels "a","b": 1 2
 $ SomeNumeric: num  1 2

The property 'value' does not exist on value of type 'HTMLElement'

This work for me:

let inputValue = (swal.getPopup().querySelector('#inputValue ')as HTMLInputElement).value

SVN repository backup strategies

svnbackup over at Google Code, a .NET console application.

How to parse JSON in Kotlin?

This uses kotlinx.serialization like Elisha's answer. Meanwhile the API is being stabilized for the upcoming 1.0 release. Note that e.g. JSON.parse was renamed to Json.parse and is now Json.decodeFromString. Also it is imported in gradle differently starting in Kotlin 1.4.0:

dependencies {
    implementation "org.jetbrains.kotlinx:kotlinx-serialization-core:1.0.0-RC"
}
apply plugin: 'kotlinx-serialization'

Example usage:

@Serializable
data class Properties(val nid: Int, val tid: Int)
@Serializable
data class Feature(val pos: List<Double>, val properties: Properties? = null, 
    val count: Int? = null)
@Serializable
data class Root(val features: List<Feature>)


val root = Json.decodeFromString<Root>(jsonStr)
val rootAlt = Json.decodeFromString(Root.serializer(), jsonStr)  // equivalent

val str = Json.encodeToString(root)  // type 'Root' can be inferred!

// For a *top-level* list (does not apply in my case) you would use 
val fList = Json.decodeFromString<List<Feature>>(jsonStr)
val fListAlt = Json.decodeFromString(ListSerializer(Feature.serializer()), jsonStr)

Kotlin's data class defines a class that mainly holds data and has .toString() and other methods (e.g. destructuring declarations) automatically defined. I'm using nullable (?) types here for optional fields.

jQueryUI modal dialog does not show close button (x)

I think the problem is that the browser could not load the jQueryUI image sprite that contains the X icon. Please use Fiddler, Firebug, or some other that can give you access to the HTTP requests the browser makes to the server and verify the image sprite is loaded successfully.

How can I clear the terminal in Visual Studio Code?

V1.33 won't accept ctrl + k to clear terminal (Windows).

You need to enable manually by adding below code in your keybiniding.json, it will override the defaults.

In your VSCode, press ctrl + shift + p, search for keyboard and click on Open Keyboard Shortcuts to open the keybindings.json file.

Note: If you open the Default one, it will show the default settings, but as this file is read-only, you can't edit it manually.

Paste the following script in keybindings.json

{
            "key": "ctr+k",
            "command": "workbench.action.terminal.clear",
            "when": "terminalFocus"
}

Save the file.

Now your terminal will clear by crtl + k

NoClassDefFoundError while trying to run my jar with java.exe -jar...what's wrong?

I have found when I am using a manifest that the listing of jars for the classpath need to have a space after the listing of each jar e.g. "required_lib/sun/pop3.jar required_lib/sun/smtp.jar ". Even if it is the last in the list.

How do I call ::CreateProcess in c++ to launch a Windows executable?

Here is a new example that works on windows 10. When using the windows10 sdk you have to use CreateProcessW instead. This example is commented and hopefully self explanatory.

#ifdef _WIN32
#include <Windows.h>
#include <iostream>
#include <stdio.h>
#include <tchar.h>
#include <cstdlib>
#include <string>
#include <algorithm>

class process
{
public:

    static PROCESS_INFORMATION launchProcess(std::string app, std::string arg)
    {

        // Prepare handles.
        STARTUPINFO si;
        PROCESS_INFORMATION pi; // The function returns this
        ZeroMemory( &si, sizeof(si) );
        si.cb = sizeof(si);
        ZeroMemory( &pi, sizeof(pi) );

        //Prepare CreateProcess args
        std::wstring app_w(app.length(), L' '); // Make room for characters
        std::copy(app.begin(), app.end(), app_w.begin()); // Copy string to wstring.

        std::wstring arg_w(arg.length(), L' '); // Make room for characters
        std::copy(arg.begin(), arg.end(), arg_w.begin()); // Copy string to wstring.

        std::wstring input = app_w + L" " + arg_w;
        wchar_t* arg_concat = const_cast<wchar_t*>( input.c_str() );
        const wchar_t* app_const = app_w.c_str();

        // Start the child process.
        if( !CreateProcessW(
            app_const,      // app path
            arg_concat,     // Command line (needs to include app path as first argument. args seperated by whitepace)
            NULL,           // Process handle not inheritable
            NULL,           // Thread handle not inheritable
            FALSE,          // Set handle inheritance to FALSE
            0,              // No creation flags
            NULL,           // Use parent's environment block
            NULL,           // Use parent's starting directory
            &si,            // Pointer to STARTUPINFO structure
            &pi )           // Pointer to PROCESS_INFORMATION structure
        )
        {
            printf( "CreateProcess failed (%d).\n", GetLastError() );
            throw std::exception("Could not create child process");
        }
        else
        {
            std::cout << "[          ] Successfully launched child process" << std::endl;
        }

        // Return process handle
        return pi;
    }

    static bool checkIfProcessIsActive(PROCESS_INFORMATION pi)
    {
        // Check if handle is closed
            if ( pi.hProcess == NULL )
            {
                printf( "Process handle is closed or invalid (%d).\n", GetLastError());
                return FALSE;
            }

        // If handle open, check if process is active
        DWORD lpExitCode = 0;
        if( GetExitCodeProcess(pi.hProcess, &lpExitCode) == 0)
        {
            printf( "Cannot return exit code (%d).\n", GetLastError() );
            throw std::exception("Cannot return exit code");
        }
        else
        {
            if (lpExitCode == STILL_ACTIVE)
            {
                return TRUE;
            }
            else
            {
                return FALSE;
            }
        }
    }

    static bool stopProcess( PROCESS_INFORMATION &pi)
    {
        // Check if handle is invalid or has allready been closed
            if ( pi.hProcess == NULL )
            {
                printf( "Process handle invalid. Possibly allready been closed (%d).\n");
                return 0;
            }

        // Terminate Process
            if( !TerminateProcess(pi.hProcess,1))
            {
                printf( "ExitProcess failed (%d).\n", GetLastError() );
                return 0;
            }

        // Wait until child process exits.
            if( WaitForSingleObject( pi.hProcess, INFINITE ) == WAIT_FAILED)
            {
                printf( "Wait for exit process failed(%d).\n", GetLastError() );
                return 0;
            }

        // Close process and thread handles.
            if( !CloseHandle( pi.hProcess ))
            {
                printf( "Cannot close process handle(%d).\n", GetLastError() );
                return 0;
            }
            else
            {
                pi.hProcess = NULL;
            }

            if( !CloseHandle( pi.hThread ))
            {
                printf( "Cannot close thread handle (%d).\n", GetLastError() );
                return 0;
            }
            else
            {
                 pi.hProcess = NULL;
            }
            return 1;
    }
};//class process
#endif //win32

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