SyntaxFix

Programs & Examples On #Urlrequest

What is the most robust way to force a UIView to redraw?

I had a problem with a big delay between calling setNeedsDisplay and drawRect: (5 seconds). It turned out I called setNeedsDisplay in a different thread than the main thread. After moving this call to the main thread the delay went away.

Hope this is of some help.

jQuery Date Picker - disable past dates

 
$( "#date" ).datetimepicker({startDate:new Date()}).datetimepicker('update', new Date());

new Date() : function get the todays date previous date are locked. 100% working

Get the second highest value in a MySQL table

 
SELECT MIN(id) as id FROM students where id>(SELECT MIN(id) FROM students);

Change div height on button click

Look at to vwphillips' post from 03-06-2010, 03:35 PM in http://www.codingforums.com/archive/index.php/t-190887.html

<html>
   <head>
      <title></title>
      <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">

      <script type="text/javascript">

        function Div(id,ud) {
           var div=document.getElementById(id);
           var h=parseInt(div.style.height)+ud;
           if (h>=1){
              div.style.height = h + "em"; // I'm using "em" instead of "px", but you can use px like measure...
           }
        }
      </script>

   </head>
   <body>
      <div>
         <input type="button" value="+" onclick="Div('my_div', 1);">&nbsp;&nbsp; 
         <input type="button" value="-" onclick="Div('my_div', -1);"></div>
      </div>

      <div id="my_div" style="height: 1em; width: 1em; overflow: auto;"></div>

   </body>
</html>

This worked for me :)

Best regards!

Registry key Error: Java version has value '1.8', but '1.7' is required

I've had the same problem. Simple solution that worked for me is to rearrange the entries in the PATH for JRE/JDK. This problem started to appear after installing JRE 8 whose installation has put some executable files in System32 or SysWOW64 directories, these executable files are messing up. To resolve the problem:

  1. Create environment variable pointing to JDK home as JAVA_HOME.

    set JAVA_HOME=C:\Progra~1\Java\jdk1.8.0_45

  2. Put the entry %JAVA_HOME%\bin at start in your PATH environment variable. Appending existing value of PATH. For example:

    path=C:\Program Files\Java\jdk1.8.0_45\bin;%path%

How to zip a file using cmd line?

The zip Package should be installed in system.

To Zip a File

zip <filename.zip> <file>

Example: 

zip doc.zip doc.txt

To Unzip a File

unzip <filename.zip>

Example:

unzip mydata.zip

Fastest way to implode an associative array with keys

What about this shorter, more transparent, yet more intuitive with array_walk

$attributes = array(
  'data-href'   => 'http://example.com',
  'data-width'  => '300',
  'data-height' => '250',
  'data-type'   => 'cover',
);

$args = "";
array_walk(
    $attributes, 
    function ($item, $key) use (&$args) {
        $args .= $key ." = '" . $item . "' ";  
    }
);
// output: 'data-href="http://example.com" data-width="300" data-height="250" data-type="cover"

Is it possible to get only the first character of a String?

Answering for C++ 14,

Yes, you can get the first character of a string simply by the following code snippet.

string s = "Happynewyear";
cout << s[0];

if you want to store the first character in a separate string,

string s = "Happynewyear";
string c = "";
c.push_back(s[0]);
cout << c;

Find the closest ancestor element that has a specific class

This does the trick:

function findAncestor (el, cls) {
    while ((el = el.parentElement) && !el.classList.contains(cls));
    return el;
}

The while loop waits until el has the desired class, and it sets el to el's parent every iteration so in the end, you have the ancestor with that class or null.

Here's a fiddle, if anyone wants to improve it. It won't work on old browsers (i.e. IE); see this compatibility table for classList. parentElement is used here because parentNode would involve more work to make sure that the node is an element.

How to "EXPIRE" the "HSET" child key in redis?

You can. Here is an example.

redis 127.0.0.1:6379> hset key f1 1
(integer) 1
redis 127.0.0.1:6379> hset key f2 2
(integer) 1
redis 127.0.0.1:6379> hvals key
1) "1"
2) "1"
3) "2"
redis 127.0.0.1:6379> expire key 10
(integer) 1
redis 127.0.0.1:6379> hvals key
1) "1"
2) "1"
3) "2"
redis 127.0.0.1:6379> hvals key
1) "1"
2) "1"
3) "2"
redis 127.0.0.1:6379> hvals key

Use EXPIRE or EXPIREAT command.

If you want to expire specific keys in the hash older then 1 month. This is not possible. Redis expire command is for all keys in the hash. If you set daily hash key, you can set a keys time to live.

hset key-20140325 f1 1
expire key-20140325 100
hset key-20140325 f1 2

UL has margin on the left

I don't see any margin or margin-left declarations for #footer-wrap li.

This ought to do the trick:

#footer-wrap ul,
#footer-wrap li {
    margin-left: 0;
    list-style-type: none;
}

How to horizontally center an unordered list of unknown width?

Use the below css to solve your issue

#footer{ text-align:center; height:58px;}
#footer ul {  font-size:11px;}
#footer ul li {display:inline-block;}

Note: Don't use float:left in li. it will make your li to align left.

Confirm Password with jQuery Validate

Remove the required: true rule.

Demo: Fiddle

jQuery('.validatedForm').validate({
            rules : {
                password : {
                    minlength : 5
                },
                password_confirm : {
                    minlength : 5,
                    equalTo : "#password"
                }
            }

Add 'x' number of hours to date

I use following function to convert normal date-time value to mysql datetime format.

private function ampmtosql($ampmdate) {
            if($ampmdate == '')
                return '';
            $ampm = substr(trim(($ampmdate)), -2);
            $datetimesql = substr(trim(($ampmdate)), 0, -3);
            if ($ampm == 'pm') {
                $hours = substr(trim($datetimesql), -5, 2);
                if($hours != '12')
                    $datetimesql = date('Y-m-d H:i',strtotime('+12 hour',strtotime($datetimesql)));
            }
            elseif ($ampm == 'am') {
                $hours = substr(trim($datetimesql), -5, 2);
                if($hours == '12')
                    $datetimesql = date('Y-m-d H:i',strtotime('-12 hour',strtotime($datetimesql)));
            }
            return $datetimesql;
        }

It converts datetime values like,

2015-06-04 09:55 AM -> 2015-06-04 09:55
2015-06-04 03:55 PM -> 2015-06-04 15:55
2015-06-04 12:30 AM -> 2015-06-04 00:55

Hope this will help someone.

How to make an ImageView with rounded corners?

My implementation of ImageView with rounded corners widget, that (down||up)sizes image to required dimensions. It utilizes code form CaspNZ.

public class ImageViewRounded extends ImageView {

    public ImageViewRounded(Context context) {
        super(context);
    }

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

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

    @Override
    protected void onDraw(Canvas canvas) {
        BitmapDrawable drawable = (BitmapDrawable) getDrawable();

        if (drawable == null) {
            return;
        }

        if (getWidth() == 0 || getHeight() == 0) {
            return; 
        }

        Bitmap fullSizeBitmap = drawable.getBitmap();

        int scaledWidth = getMeasuredWidth();
        int scaledHeight = getMeasuredHeight();

        Bitmap mScaledBitmap;
        if (scaledWidth == fullSizeBitmap.getWidth() && scaledHeight == fullSizeBitmap.getHeight()) {
            mScaledBitmap = fullSizeBitmap;
        } else {
            mScaledBitmap = Bitmap.createScaledBitmap(fullSizeBitmap, scaledWidth, scaledHeight, true /* filter */);
        }

        Bitmap roundBitmap = ImageUtilities.getRoundedCornerBitmap(getContext(), mScaledBitmap, 5, scaledWidth, scaledHeight,
                false, false, false, false);
        canvas.drawBitmap(roundBitmap, 0, 0, null);

    }

}

C++ Boost: undefined reference to boost::system::generic_category()

Il the library is not installed you should give boost libraries folder:

example:

g++ -L/usr/lib/x86_64-linux-gnu -lboost_system -lboost_filesystem prog.cpp -o prog

Can I escape html special chars in javascript?

This is, by far, the fastest way I have seen it done. Plus, it does it all without adding, removing, or changing elements on the page.

function escapeHTML(unsafeText) {
    let div = document.createElement('div');
    div.innerText = unsafeText;
    return div.innerHTML;
}

Convert text to columns in Excel using VBA

Try this

Sub Txt2Col()
    Dim rng As Range

    Set rng = [C7]
    Set rng = Range(rng, Cells(Rows.Count, rng.Column).End(xlUp))

    rng.TextToColumns Destination:=rng, DataType:=xlDelimited, ' rest of your settings

Update: button click event to act on another sheet

Private Sub CommandButton1_Click()
    Dim rng As Range
    Dim sh As Worksheet

    Set sh = Worksheets("Sheet2")
    With sh
        Set rng = .[C7]
        Set rng = .Range(rng, .Cells(.Rows.Count, rng.Column).End(xlUp))

        rng.TextToColumns Destination:=rng, DataType:=xlDelimited, _
        TextQualifier:=xlDoubleQuote,  _
        ConsecutiveDelimiter:=False, _
        Tab:=False, _
        Semicolon:=False, _
        Comma:=True, 
        Space:=False, 
        Other:=False, _
        FieldInfo:=Array(Array(1, xlGeneralFormat), Array(2, xlGeneralFormat), Array(3, xlGeneralFormat)), _
        TrailingMinusNumbers:=True
    End With
End Sub

Note the .'s (eg .Range) they refer to the With statement object

Good ways to sort a queryset? - Django

I just wanted to illustrate that the built-in solutions (SQL-only) are not always the best ones. At first I thought that because Django's QuerySet.objects.order_by method accepts multiple arguments, you could easily chain them:

ordered_authors = Author.objects.order_by('-score', 'last_name')[:30]

But, it does not work as you would expect. Case in point, first is a list of presidents sorted by score (selecting top 5 for easier reading):

>>> auths = Author.objects.order_by('-score')[:5]
>>> for x in auths: print x
... 
James Monroe (487)
Ulysses Simpson (474)
Harry Truman (471)
Benjamin Harrison (467)
Gerald Rudolph (464)

Using Alex Martelli's solution which accurately provides the top 5 people sorted by last_name:

>>> for x in sorted(auths, key=operator.attrgetter('last_name')): print x
... 
Benjamin Harrison (467)
James Monroe (487)
Gerald Rudolph (464)
Ulysses Simpson (474)
Harry Truman (471)

And now the combined order_by call:

>>> myauths = Author.objects.order_by('-score', 'last_name')[:5]
>>> for x in myauths: print x
... 
James Monroe (487)
Ulysses Simpson (474)
Harry Truman (471)
Benjamin Harrison (467)
Gerald Rudolph (464)

As you can see it is the same result as the first one, meaning it doesn't work as you would expect.

Convert string into Date type on Python

 
from datetime import datetime

a = datetime.strptime(f, "%Y-%m-%d")

Using ListView : How to add a header view?

You can add as many headers as you like by calling addHeaderView() multiple times. You have to do it before setting the adapter to the list view.

And yes you can add header something like this way:

LayoutInflater inflater = getLayoutInflater();
ViewGroup header = (ViewGroup)inflater.inflate(R.layout.header, myListView, false);
myListView.addHeaderView(header, null, false);

Determine if a cell (value) is used in any formula

Have you tried Tools > Formula Auditing?

How to use session in JSP pages to get information?

 
<%! String username=(String)session.getAttribute("username"); %>
form action="editinfo" method="post">

    <table>
        <tr>
            <td>Username: </td><td> <input type="text" value="<%=username %>" /> </td>
        </tr>

    </table>

add <%! String username=(String)session.getAttribute("username"); %>

How to unload a package without restarting R

You can uncheck the checkbox button in RStudio (packages).

RStudio packages pane

Using node.js as a simple web server

local-web-server is definitely worth a look! Here's an excerpt from the readme:

local-web-server

A lean, modular web server for rapid full-stack development.

  • Supports HTTP, HTTPS and HTTP2.
  • Small and 100% personalisable. Load and use only the behaviour required by your project.
  • Attach a custom view to personalise how activity is visualised.
  • Programmatic and command-line interfaces.

Use this tool to:

  • Build any type of front-end web application (static, dynamic, Single Page App, Progessive Web App, React etc).
  • Prototype a back-end service (REST API, microservice, websocket, Server Sent Events service etc).
  • Monitor activity, analyse performance, experiment with caching strategy etc.

Local-web-server is a distribution of lws bundled with a "starter pack" of useful middleware.

Synopsis

This package installs the ws command-line tool (take a look at the usage guide).

Static web site

Running ws without any arguments will host the current directory as a static web site. Navigating to the server will render a directory listing or your index.html, if that file exists.

$ ws
Listening on http://mbp.local:8000, http://127.0.0.1:8000, http://192.168.0.100:8000

Static files tutorial.

This clip demonstrates static hosting plus a couple of log output formats - dev and stats.

Single Page Application

Serving a Single Page Application (an app with client-side routing, e.g. a React or Angular app) is as trivial as specifying the name of your single page:

$ ws --spa index.html

With a static site, requests for typical SPA paths (e.g. /user/1, /login) would return 404 Not Found as a file at that location does not exist. However, by marking index.html as the SPA you create this rule:

If a static file is requested (e.g. /css/style.css) then serve it, if not (e.g. /login) then serve the specified SPA and handle the route client-side.

SPA tutorial.

URL rewriting and proxied requests

Another common use case is to forward certain requests to a remote server.

The following command proxies blog post requests from any path beginning with /posts/ to https://jsonplaceholder.typicode.com/posts/. For example, a request for /posts/1 would be proxied to https://jsonplaceholder.typicode.com/posts/1.

$ ws --rewrite '/posts/(.*) -> https://jsonplaceholder.typicode.com/posts/$1'

Rewrite tutorial.

This clip demonstrates the above plus use of --static.extensions to specify a default file extension and --verbose to monitor activity.

HTTPS and HTTP2

For HTTPS or HTTP2, pass the --https or --http2 flags respectively. See the wiki for further configuration options and a guide on how to get the "green padlock" in your browser.

$ lws --http2
Listening at https://mba4.local:8000, https://127.0.0.1:8000, https://192.168.0.200:8000

Change string color with NSAttributedString?

For Swift 5:

var attributes = [NSAttributedString.Key: AnyObject]()
attributes[.foregroundColor] = UIColor.red

let attributedString = NSAttributedString(string: "Very Bad", attributes: attributes)

label.attributedText = attributedString

For Swift 4:

var attributes = [NSAttributedStringKey: AnyObject]()
attributes[.foregroundColor] = UIColor.red

let attributedString = NSAttributedString(string: "Very Bad", attributes: attributes)

label.attributedText = attributedString

For Swift 3:

var attributes = [String: AnyObject]()
attributes[NSForegroundColorAttributeName] = UIColor.red

let attributedString = NSAttributedString(string: "Very Bad", attributes: attributes)

label.attributedText = attributedString

Getting a browser's name client-side

The browser discloses it in navigator.userAgent. If you're using jQuery, you're better off using jQuery.browser as @Rab Nawaz said. However, as the API documentation says, it's better to check for feature support if possible. Quoting the documentation:

We recommend against using this property; please try to use feature detection instead (see jQuery.support). jQuery.browser may be moved to a plugin in a future release of jQuery.

Here is a code example:

function isIE() {
    if (window.jQuery) {
        return jQuery.browser.msie || false;
    } else {
        // adapted from jQuery's source:
        return navigator.userAgent.toLowerCase().indexOf('msie') >= 0;
    }
}

What is the difference between declarative and imperative paradigm in programming?

Declarative vs. Imperative

A programming paradigm is a fundamental style of computer programming. There are four main paradigms: imperative, declarative, functional (which is considered a subset of the declarative paradigm) and object-oriented.

Declarative programming : is a programming paradigm that expresses the logic of a computation(What do) without describing its control flow(How do). Some well-known examples of declarative domain specific languages (DSLs) include CSS, regular expressions, and a subset of SQL (SELECT queries, for example) Many markup languages such as HTML, MXML, XAML, XSLT... are often declarative. The declarative programming try to blur the distinction between a program as a set of instructions and a program as an assertion about the desired answer.

Imperative programming : is a programming paradigm that describes computation in terms of statements that change a program state. The declarative programs can be dually viewed as programming commands or mathematical assertions.

Functional programming : is a programming paradigm that treats computation as the evaluation of mathematical functions and avoids state and mutable data. It emphasizes the application of functions, in contrast to the imperative programming style, which emphasizes changes in state. In a pure functional language, such as Haskell, all functions are without side effects, and state changes are only represented as functions that transform the state.

The following example of imperative programming in MSDN, loops through the numbers 1 through 10, and finds the even numbers.

var numbersOneThroughTen = new List<int> { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
//With imperative programming, we'd step through this, and decide what we want:
var evenNumbers = new List<int>();
foreach (var number in numbersOneThroughTen)
{    if (number % 2 == 0)
    {
        evenNumbers.Add(number);
    }
}
//The following code uses declarative programming to accomplish the same thing.
// Here, we're saying "Give us everything where it's even"
var evenNumbers = numbersOneThroughTen.Select(number => number % 2 == 0);

Both examples yield the same result, and one is neither better nor worse than the other. The first example requires more code, but the code is testable, and the imperative approach gives you full control over the implementation details. In the second example, the code is arguably more readable; however, LINQ does not give you control over what happens behind the scenes. You must trust that LINQ will provide the requested result.

How do I zip two arrays in JavaScript?

Zip Arrays of same length:

Using Array.prototype.map()

_x000D_
_x000D_ 
const zip = (a, b) => a.map((k, i) => [k, b[i]]);

console.log(zip([1,2,3], ["a","b","c"]));
// [[1, "a"], [2, "b"], [3, "c"]]
_x000D_
_x000D_
_x000D_

Zip Arrays of different length:

Using Array.from()

_x000D_
_x000D_ 
const zip = (a, b) => Array.from(Array(Math.max(b.length, a.length)), (_, i) => [a[i], b[i]]);

console.log( zip([1,2,3], ["a","b","c","d"]) );
// [[1, "a"], [2, "b"], [3, "c"], [undefined, "d"]]
_x000D_
_x000D_
_x000D_

Using Array.prototype.fill() and Array.prototype.map()

_x000D_
_x000D_ 
const zip = (a, b) => Array(Math.max(b.length, a.length)).fill().map((_,i) => [a[i], b[i]]);

console.log(zip([1,2,3], ["a","b","c","d"]));
// [[1, "a"], [2, "b"], [3, "c"], [undefined, 'd']]
_x000D_
_x000D_
_x000D_

How do I rename a Git repository?

Open git repository on browser, got to "Setttings", you can see rename button.

Input new "Repository Name" and click "Rename" button.

How to layout multiple panels on a jFrame? (java)

You'll want to use a number of layout managers to help you achieve the basic results you want.

Check out A Visual Guide to Layout Managers for a comparision.

You could use a GridBagLayout but that's one of the most complex (and powerful) layout managers available in the JDK.

You could use a series of compound layout managers instead.

I'd place the graphics component and text area on a single JPanel, using a BorderLayout, with the graphics component in the CENTER and the text area in the SOUTH position.

I'd place the text field and button on a separate JPanel using a GridBagLayout (because it's the simplest I can think of to achieve the over result you want)

I'd place these two panels onto a third, master, panel, using a BorderLayout, with the first panel in the CENTER and the second at the SOUTH position.

But that's me

PHP header redirect 301 - what are the implications?

This is better:

<?php
//* Permanently redirect page
header("Location: new_page.php",TRUE,301);
?>

Just one call including code 301. Also notice the relative path to the file in the same directory (not "/dir/dir/new_page.php", etc.), which all modern browsers seem to support.

I think this is valid since PHP 5.1.2, possibly earlier.

Using "super" in C++

Super (or inherited) is Very Good Thing because if you need to stick another inheritance layer in between Base and Derived, you only have to change two things: 1. the "class Base: foo" and 2. the typedef

If I recall correctly, the C++ Standards committee was considering adding a keyword for this... until Michael Tiemann pointed out that this typedef trick works.

As for multiple inheritance, since it's under programmer control you can do whatever you want: maybe super1 and super2, or whatever.

Windows batch script to unhide files hidden by virus

 
echo "Enter Drive letter" 
set /p driveletter=

attrib -s -h -a /s /d  %driveletter%:\*.*

Open file with associated application

This is an old thread but just in case anyone comes across it like I did. pi.FileName needs to be set to the file name (and possibly full path to file ) of the executable you want to use to open your file. The below code works for me to open a video file with VLC.

var path = files[currentIndex].fileName;
var pi = new ProcessStartInfo(path)
{
    Arguments = Path.GetFileName(path),
    UseShellExecute = true,
    WorkingDirectory = Path.GetDirectoryName(path),
    FileName = "C:\\Program Files (x86)\\VideoLAN\\VLC\\vlc.exe",
    Verb = "OPEN"
};
Process.Start(pi)

Tigran's answer works but will use windows' default application to open your file, so using ProcessStartInfo may be useful if you want to open the file with an application that is not the default.

Spring Boot without the web server

You can use the spring-boot-starter dependency. This will not have the web stuff.

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter</artifactId>
</dependency>

CSS div element - how to show horizontal scroll bars only?

We should set to overflow: auto and hide a scrollbar which we don't use for working on unsupporting CSS3 browser. Look at this CSS Overflow; XME.im

MVC Razor Hidden input and passing values

You are doing it wrong since you try to map WebForms in the MVC application.

There are no server side controlls in MVC. Only the View and the Controller on the back-end. You send the data from server to the client by means of initialization of the View with your model.

This is happening on the HTTP GET request to your resource.

[HttpGet]
public ActionResult Home() 
{
  var model = new HomeModel { Greeatings = "Hi" };
  return View(model);
}

You send data from client to server by means of posting data to server. To make that happen, you create a form inside your view and [HttpPost] handler in your controller.

// View

@using (Html.BeginForm()) {
  @Html.TextBoxFor(m => m.Name)
  @Html.TextBoxFor(m => m.Password)
}

// Controller

[HttpPost]
public ActionResult Home(LoginModel model) 
{
  // do auth.. and stuff
  return Redirect();
}

How to use LocalBroadcastManager?

In Eclipse, eventually I had to add Compatibility/Support Library by right-clicking on my project and selecting:

Android Tools -> Add Support Library

Once it was added, then I was able to use LocalBroadcastManager class in my code.

Android Compatibility Library

How can I return pivot table output in MySQL?

Correct answer is:

select table_record_id,
group_concat(if(value_name='note', value_text, NULL)) as note
,group_concat(if(value_name='hire_date', value_text, NULL)) as hire_date
,group_concat(if(value_name='termination_date', value_text, NULL)) as termination_date
,group_concat(if(value_name='department', value_text, NULL)) as department
,group_concat(if(value_name='reporting_to', value_text, NULL)) as reporting_to
,group_concat(if(value_name='shift_start_time', value_text, NULL)) as shift_start_time
,group_concat(if(value_name='shift_end_time', value_text, NULL)) as shift_end_time
from other_value
where table_name = 'employee'
and is_active = 'y'
and is_deleted = 'n'
GROUP BY table_record_id

Creating a PDF from a RDLC Report in the Background

You can instanciate LocalReport 

                FicheInscriptionBean fiche = new FicheInscriptionBean();
                fiche.ToFicheInscriptionBean(inscription);List<FicheInscriptionBean> list = new List<FicheInscriptionBean>();
                list.Add(fiche);
                ReportDataSource rds = new ReportDataSource();
                rds = new ReportDataSource("InscriptionDataSet", list);
                // attachement du QrCode.
                string stringToCode = numinscription + "," + inscription.Nom + "," + inscription.Prenom + "," + inscription.Cin;
                Bitmap BitmapCaptcha = PostulerFiche.GenerateQrCode(fiche.NumInscription + ":" + fiche.Cin, Brushes.Black, Brushes.White, 200);
                MemoryStream ms = new MemoryStream();
                BitmapCaptcha.Save(ms, ImageFormat.Gif);
                var base64Data = Convert.ToBase64String(ms.ToArray());
                string QR_IMG = base64Data;
                ReportParameter parameter = new ReportParameter("QR_IMG", QR_IMG, true);

                LocalReport report = new LocalReport();
                report.ReportPath = Page.Server.MapPath("~/rdlc/FicheInscription.rdlc");
                report.DataSources.Clear();
                report.SetParameters(new ReportParameter[] { parameter });
                report.DataSources.Add(rds);
                report.Refresh();

                string FileName = "FichePreinscription_" + numinscription + ".pdf";
                string extension;
                string encoding;
                string mimeType;
                string[] streams;
                Warning[] warnings;
                Byte[] mybytes = report.Render("PDF", null,
                              out extension, out encoding,
                              out mimeType, out streams, out warnings);
                using (FileStream fs = File.Create(Server.MapPath("~/rdlc/Reports/" + FileName)))
                {
                    fs.Write(mybytes, 0, mybytes.Length);
                }
                Response.ClearHeaders();
                Response.ClearContent();
                Response.Buffer = true;
                Response.Clear();
                Response.Charset = "";
                Response.ContentType = "application/pdf";
                Response.AddHeader("Content-Disposition", "attachment;filename=\"" + FileName + "\"");
                Response.WriteFile(Server.MapPath("~/rdlc/Reports/" + FileName));

                Response.Flush();
                File.Delete(Server.MapPath("~/rdlc/Reports/" + FileName));
                Response.Close();
                Response.End();

jQuery has deprecated synchronous XMLHTTPRequest

My workabout: I use asynchronous requests dumping the code to a buffer. I have a loop checking the buffer every second. When the dump has arrived to the buffer I execute the code. I also use a timeout. For the end user the page works as if synchronous requests would be used.

Repeat a string in JavaScript a number of times

Can be used as a one-liner too:

function repeat(str, len) {
    while (str.length < len) str += str.substr(0, len-str.length);
    return str;
}

Should I write script in the body or the head of the html?

The problem with writing scripts at the head of a page is blocking. The browser must stop processing the page until the script is download, parsed and executed. The reason for this is pretty clear, these scripts might insert more into the page changing the result of the rendering, they also may remove things that dont need to be rendered, etc.

Some of the more modern browsers violate this rule by not blocking on the downloading the scripts (ie8 was the first) but overall the download isn't the majority of the time spent blocking.

Check out Even Faster Websites, I just finished reading it and it goes over all of the fast ways to get scripts onto a page, Including putting scripts at the bottom of the page to allow rendering to complete (better UX).

How to check string length with JavaScript

 
 var myString = 'sample String';   var length = myString.length ;

first you need to defined a keypressed handler or some kind of a event trigger to listen , btw , getting the length is really simple like mentioned above

Create a new RGB OpenCV image using Python?

The new cv2 interface for Python integrates numpy arrays into the OpenCV framework, which makes operations much simpler as they are represented with simple multidimensional arrays. For example, your question would be answered with:

import cv2  # Not actually necessary if you just want to create an image.
import numpy as np
blank_image = np.zeros((height,width,3), np.uint8)

This initialises an RGB-image that is just black. Now, for example, if you wanted to set the left half of the image to blue and the right half to green , you could do so easily:

blank_image[:,0:width//2] = (255,0,0)      # (B, G, R)
blank_image[:,width//2:width] = (0,255,0)

If you want to save yourself a lot of trouble in future, as well as having to ask questions such as this one, I would strongly recommend using the cv2 interface rather than the older cv one. I made the change recently and have never looked back. You can read more about cv2 at the OpenCV Change Logs.

DLL and LIB files - what and why?

There are static libraries (LIB) and dynamic libraries (DLL) - but note that .LIB files can be either static libraries (containing object files) or import libraries (containing symbols to allow the linker to link to a DLL).

Libraries are used because you may have code that you want to use in many programs. For example if you write a function that counts the number of characters in a string, that function will be useful in lots of programs. Once you get that function working correctly you don't want to have to recompile the code every time you use it, so you put the executable code for that function in a library, and the linker can extract and insert the compiled code into your program. Static libraries are sometimes called 'archives' for this reason.

Dynamic libraries take this one step further. It seems wasteful to have multiple copies of the library functions taking up space in each of the programs. Why can't they all share one copy of the function? This is what dynamic libraries are for. Rather than building the library code into your program when it is compiled, it can be run by mapping it into your program as it is loaded into memory. Multiple programs running at the same time that use the same functions can all share one copy, saving memory. In fact, you can load dynamic libraries only as needed, depending on the path through your code. No point in having the printer routines taking up memory if you aren't doing any printing. On the other hand, this means you have to have a copy of the dynamic library installed on every machine your program runs on. This creates its own set of problems.

As an example, almost every program written in 'C' will need functions from a library called the 'C runtime library, though few programs will need all of the functions. The C runtime comes in both static and dynamic versions, so you can determine which version your program uses depending on particular needs.

Nesting CSS classes

I do not believe this is possible. You could add class1 to all elements which also have class2. If this is not practical to do manually, you could do it automatically with JavaScript (fairly easy to do with jQuery).

datetimepicker is not a function jquery

It's all about the order of the scripts. Try to reorder them, place jquery.datetimepicker.js to be last of all scripts!

The term "Add-Migration" is not recognized

Just try init Microsoft.EntityFrameworkCore.Tools. In PM execute 

C:\Users\<username>\.nuget\packages\Microsoft.EntityFrameworkCore.Tools\1.0.0-preview2-final\tools\init.ps1.

It helped me with the same problem. A version of the tools might be different. It`s depended of what you use in your project.

Index Error: list index out of range (Python)

Generally it means that you are providing an index for which a list element does not exist.

E.g, if your list was [1, 3, 5, 7], and you asked for the element at index 10, you would be well out of bounds and receive an error, as only elements 0 through 3 exist.

How to overlay images

I just got done doing this exact thing in a project. The HTML side looked a bit like this:

<a href="[fullsize]" class="gallerypic" title="">
  <img src="[thumbnail pic]" height="90" width="140" alt="[Gallery Photo]" class="pic" />
  <span class="zoom-icon">
      <img src="/images/misc/zoom.gif" width="32" height="32" alt="Zoom">
  </span>
</a>

Then using CSS:

a.gallerypic{
  width:140px;
  text-decoration:none;
  position:relative;
  display:block;
  border:1px solid #666;
  padding:3px;
  margin-right:5px;
  float:left;
}

a.gallerypic span.zoom-icon{
  visibility:hidden;
  position:absolute;
  left:40%;
  top:35%;
  filter:alpha(opacity=50);
  -moz-opacity:0.5;
  -khtml-opacity: 0.5;
  opacity: 0.5;
}

a.gallerypic:hover span.zoom-icon{
  visibility:visible;
}

I left a lot of the sample in there on the CSS so you can see how I decided to do the style. Note I lowered the opacity so you could see through the magnifying glass.

Hope this helps.

EDIT: To clarify for your example - you could ignore the visibility:hidden; and kill the :hover execution if you wanted, this was just the way I did it.

Invalid self signed SSL cert - "Subject Alternative Name Missing"

To fix this, you need to supply an extra parameter to openssl when you're creating the cert, basically

-sha256 -extfile v3.ext

where v3.ext is a file like so, with %%DOMAIN%% replaced with the same name you use as your Common Name. More info here and over here. Note that typically you'd set the Common Name and %%DOMAIN%% to the domain you're trying to generate a cert for. So if it was www.mysupersite.com, then you'd use that for both.

v3.ext

authorityKeyIdentifier=keyid,issuer
basicConstraints=CA:FALSE
keyUsage = digitalSignature, nonRepudiation, keyEncipherment, dataEncipherment
subjectAltName = @alt_names

[alt_names]
DNS.1 = %%DOMAIN%%

Note: Scripts that address this issue, and create fully trusted ssl certs for use in Chrome, Safari and from Java clients can be found here

Another note: If all you're trying to do is stop chrome from throwing errors when viewing a self signed certificate, you can can tell Chrome to ignore all SSL errors for ALL sites by starting it with a special command line option, as detailed here on SuperUser

Best way to track onchange as-you-type in input type="text"?

Update:

See Another answer (2015).

Original 2009 Answer:

So, you want the onchange event to fire on keydown, blur, and paste? That's magic.

If you want to track changes as they type, use "onkeydown". If you need to trap paste operations with the mouse, use "onpaste" (IE, FF3) and "oninput" (FF, Opera, Chrome, Safari1).

1Broken for <textarea> on Safari. Use textInput instead

SQL How to remove duplicates within select query?

here is the solution for your query returning only one row for each date in that table here in the solution 'tony' will occur twice as two different start dates are there for it 

SELECT * FROM 
(
    SELECT T1.*, ROW_NUMBER() OVER(PARTITION BY TRUNC(START_DATE),OWNER_NAME ORDER BY 1,2 DESC )  RNM
    FROM TABLE T1
)
WHERE RNM=1

Reading file contents on the client-side in javascript in various browsers

There's a modern native alternative: File implements Blob, so we can call Blob.text().

_x000D_
_x000D_ 
async function readText(event) {
  const file = event.target.files.item(0)
  const text = await file.text();
  
  document.getElementById("output").innerText = text
}
_x000D_ 
<input type="file" onchange="readText(event)" />
<pre id="output"></pre>
_x000D_
_x000D_
_x000D_

Currently (September 2020) this is supported in Chrome and Firefox, for other Browser you need to load a polyfill, e.g. blob-polyfill.

Create a tag in a GitHub repository

You just have to push the tag after you run the git tag 2.0 command.

So just do git push --tags now.

Getting first value from map in C++

As simple as:

your_map.begin()->first // key
your_map.begin()->second // value

Getting the difference between two sets

Try this 

test2.removeAll(test1);

Set#removeAll

Removes from this set all of its elements that are contained in the specified collection (optional operation). If the specified collection is also a set, this operation effectively modifies this set so that its value is the asymmetric set difference of the two sets.

How to get the fragment instance from the FragmentActivity?

To get the fragment instance in a class that extends FragmentActivity: 

MyclassFragment instanceFragment=
    (MyclassFragment)getSupportFragmentManager().findFragmentById(R.id.idFragment);

To get the fragment instance in a class that extends Fragment: 

MyclassFragment instanceFragment =  
    (MyclassFragment)getFragmentManager().findFragmentById(R.id.idFragment);

What's the difference between isset() and array_key_exists()?

Complementing (as an algebraic curiosity) the @deceze answer with the @ operator, and indicating cases where is "better" to use @ ... Not really better if you need (no log and) micro-performance optimization:

  • array_key_exists: is true if a key exists in an array;
  • isset: is true if the key/variable exists and is not null [faster than array_key_exists];
  • @$array['key']: is true if the key/variable exists and is not (null or '' or 0); [so much slower?] 
$a = array('k1' => 'HELLO', 'k2' => null, 'k3' => '', 'k4' => 0);

print isset($a['k1'])? "OK $a[k1].": 'NO VALUE.';            // OK
print array_key_exists('k1', $a)? "OK $a[k1].": 'NO VALUE.'; // OK
print @$a['k1']? "OK $a[k1].": 'NO VALUE.';                  // OK
// outputs OK HELLO.  OK HELLO. OK HELLO.

print isset($a['k2'])? "OK $a[k2].": 'NO VALUE.';            // NO
print array_key_exists('k2', $a)? "OK $a[k2].": 'NO VALUE.'; // OK
print @$a['k2']? "OK $a[k2].": 'NO VALUE.';                  // NO
// outputs NO VALUE.  OK .  NO VALUE.

print isset($a['k3'])? "OK $a[k3].": 'NO VALUE.';            // OK
print array_key_exists('k3', $a)? "OK $a[k3].": 'NO VALUE.'; // OK
print @$a['k3']? "OK $a[k3].": 'NO VALUE.';                  // NO
// outputs OK . OK . NO VALUE.

print isset($a['k4'])? "OK $a[k4].": 'NO VALUE.';            // OK
print array_key_exists('k4', $a)? "OK $a[k4].": 'NO VALUE.'; // OK
print @$a['k4']? "OK $a[k4].": 'NO VALUE.';                  // NO
// outputs OK 0. OK 0. NO VALUE

PS: you can change/correct/complement this text, it is a Wiki.

How to use support FileProvider for sharing content to other apps?

Here is my blog post about why we need to use FileProvider and how to use it correctly. Fully updated to the latest versions of Android.

How to change the time format (12/24 hours) of an <input>?

By HTML5 drafts, input type=time creates a control for time of the day input, expected to be implemented using “the user’s preferred presentation”. But this really means using a widget where time presentation follows the rules of the browser’s locale. So independently of the language of the surrounding content, the presentation varies by the language of the browser, the language of the underlying operating system, or the system-wide locale settings (depending on browser). For example, using a Finnish-language version of Chrome, I see the widget as using the standard 24-hour clock. Your mileage will vary.

Thus, input type=time are based on an idea of localization that takes it all out of the hands of the page author. This is intentional; the problem has been raised in HTML5 discussions several times, with the same outcome: no change. (Except possibly added clarifications to the text, making this behavior described as intended.)

Note that pattern and placeholder attributes are not allowed in input type=time. And placeholder="hrs:mins", if it were implemented, would be potentially misleading. It’s quite possible that the user has to type 12.30 (with a period) and not 12:30, when the browser locale uses “.” as a separator in times.

My conclusion is that you should use input type=text, with pattern attribute and with some JavaScript that checks the input for correctness on browsers that do not support the pattern attribute natively.

Ajax call Into MVC Controller- Url Issue

Simple way to access the Url Try this Code

 $.ajax({
     type: "POST",
      url: '/Controller/Search', 
     data: "{queryString:'" + searchVal + "'}",
     contentType: "application/json; charset=utf-8",
     dataType: "html",
     success: function (data) {
     alert("here" + data.d.toString());
    });

How do you connect to multiple MySQL databases on a single webpage?

I just made my life simple:

CREATE VIEW another_table AS SELECT * FROM another_database.another_table;

hope it is helpful... cheers...

How to split a long array into smaller arrays, with JavaScript

Just loop over the array, splicing it until it's all consumed.



var a = ['a','b','c','d','e','f','g']
  , chunk

while (a.length > 0) {

  chunk = a.splice(0,3)

  console.log(chunk)

}

output


[ 'a', 'b', 'c' ]
[ 'd', 'e', 'f' ]
[ 'g' ]

Installing J2EE into existing eclipse IDE

http://download.eclipse.org/webtools/updates/ - This is an old URL and doesn't work any more. If you want to install WTP (i.e. J2EE plugins) use the following URLs depending upon the version of the eclipse you are using:

More information can be found here.

Convert an integer to an array of digits

In Scala, you can do it like:

def convert(a: Int, acc: List[Int] = Nil): List[Int] =
  if (a > 0) convert(a / 10, a % 10 +: acc) else acc

In one line and without reversing the order.

How to diff one file to an arbitrary version in Git?

If you want to see the difference between the last commit of a single file you can do:

git log -p -1 filename

This will give you the diff of the file in git, is not comparing your local file.

DirectX SDK (June 2010) Installation Problems: Error Code S1023

Find Microsoft Visual C++ 2010 x86/x64 Redistributable – 10.0.xxxxx in the control panel of the add or remove programs if xxxxx > 30319 renmove it

I just wanted to say that this(I also emptied my temp folder, in Computer->C:->Properties->Disk Cleanup) made the DirectX June 2010 SDK install without failure, I have Vista32bit for all it matters. Thank you Mr.Lyn! :)

How can I discard remote changes and mark a file as "resolved"?

git checkout has the --ours option to check out the version of the file that you had locally (as opposed to --theirs, which is the version that you pulled in). You can pass . to git checkout to tell it to check out everything in the tree. Then you need to mark the conflicts as resolved, which you can do with git add, and commit your work once done:

git checkout --ours .  # checkout our local version of all files
git add -u             # mark all conflicted files as merged
git commit             # commit the merge

Note the . in the git checkout command. That's very important, and easy to miss. git checkout has two modes; one in which it switches branches, and one in which it checks files out of the index into the working copy (sometimes pulling them into the index from another revision first). The way it distinguishes is by whether you've passed a filename in; if you haven't passed in a filename, it tries switching branches (though if you don't pass in a branch either, it will just try checking out the current branch again), but it refuses to do so if there are modified files that that would effect. So, if you want a behavior that will overwrite existing files, you need to pass in . or a filename in order to get the second behavior from git checkout.

It's also a good habit to have, when passing in a filename, to offset it with --, such as git checkout --ours -- <filename>. If you don't do this, and the filename happens to match the name of a branch or tag, Git will think that you want to check that revision out, instead of checking that filename out, and so use the first form of the checkout command.

I'll expand a bit on how conflicts and merging work in Git. When you merge in someone else's code (which also happens during a pull; a pull is essentially a fetch followed by a merge), there are few possible situations.

The simplest is that you're on the same revision. In this case, you're "already up to date", and nothing happens.

Another possibility is that their revision is simply a descendent of yours, in which case you will by default have a "fast-forward merge", in which your HEAD is just updated to their commit, with no merging happening (this can be disabled if you really want to record a merge, using --no-ff).

Then you get into the situations in which you actually need to merge two revisions. In this case, there are two possible outcomes. One is that the merge happens cleanly; all of the changes are in different files, or are in the same files but far enough apart that both sets of changes can be applied without problems. By default, when a clean merge happens, it is automatically committed, though you can disable this with --no-commit if you need to edit it beforehand (for instance, if you rename function foo to bar, and someone else adds new code that calls foo, it will merge cleanly, but produce a broken tree, so you may want to clean that up as part of the merge commit in order to avoid having any broken commits).

The final possibility is that there's a real merge, and there are conflicts. In this case, Git will do as much of the merge as it can, and produce files with conflict markers (<<<<<<<, =======, and >>>>>>>) in your working copy. In the index (also known as the "staging area"; the place where files are stored by git add before committing them), you will have 3 versions of each file with conflicts; there is the original version of the file from the ancestor of the two branches you are merging, the version from HEAD (your side of the merge), and the version from the remote branch.

In order to resolve the conflict, you can either edit the file that is in your working copy, removing the conflict markers and fixing the code up so that it works. Or, you can check out the version from one or the other sides of the merge, using git checkout --ours or git checkout --theirs. Once you have put the file into the state you want it, you indicate that you are done merging the file and it is ready to commit using git add, and then you can commit the merge with git commit.

Expand/collapse section in UITableView in iOS

To implement the collapsible table section in iOS, the magic is how to control the number of rows for each section, or we can manage the height of rows for each section.

Also, we need to customize the section header so that we can listen to the tap event from the header area (whether it's a button or the whole header).

How to deal with the header? It's very simple, we extend the UITableViewCell class and make a custom header cell like so:

import UIKit

class CollapsibleTableViewHeader: UITableViewCell {

    @IBOutlet var titleLabel: UILabel!
    @IBOutlet var toggleButton: UIButton!

}

then use the viewForHeaderInSection to hook up the header cell:

override func tableView(tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
  let header = tableView.dequeueReusableCellWithIdentifier("header") as! CollapsibleTableViewHeader

  header.titleLabel.text = sections[section].name
  header.toggleButton.tag = section
  header.toggleButton.addTarget(self, action: #selector(CollapsibleTableViewController.toggleCollapse), forControlEvents: .TouchUpInside)

  header.toggleButton.rotate(sections[section].collapsed! ? 0.0 : CGFloat(M_PI_2))

  return header.contentView
}

remember we have to return the contentView because this function expects a UIView to be returned.

Now let's deal with the collapsible part, here is the toggle function that toggle the collapsible prop of each section:

func toggleCollapse(sender: UIButton) {
  let section = sender.tag
  let collapsed = sections[section].collapsed

  // Toggle collapse
  sections[section].collapsed = !collapsed

  // Reload section
  tableView.reloadSections(NSIndexSet(index: section), withRowAnimation: .Automatic)
}

depends on how you manage the section data, in this case, I have the section data something like this:

struct Section {
  var name: String!
  var items: [String]!
  var collapsed: Bool!

  init(name: String, items: [String]) {
    self.name = name
    self.items = items
    self.collapsed = false
  }
}

var sections = [Section]()

sections = [
  Section(name: "Mac", items: ["MacBook", "MacBook Air", "MacBook Pro", "iMac", "Mac Pro", "Mac mini", "Accessories", "OS X El Capitan"]),
  Section(name: "iPad", items: ["iPad Pro", "iPad Air 2", "iPad mini 4", "Accessories"]),
  Section(name: "iPhone", items: ["iPhone 6s", "iPhone 6", "iPhone SE", "Accessories"])
]

at last, what we need to do is based on the collapsible prop of each section, control the number of rows of that section:

override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
  return (sections[section].collapsed!) ? 0 : sections[section].items.count
}

I have a fully working demo on my Github: https://github.com/jeantimex/ios-swift-collapsible-table-section

demo

If you want to implement the collapsible sections in a grouped-style table, I have another demo with source code here: https://github.com/jeantimex/ios-swift-collapsible-table-section-in-grouped-section

Hope that helps.

Git conflict markers

The line (or lines) between the lines beginning <<<<<<< and ====== here:

<<<<<<< HEAD:file.txt
Hello world
=======

... is what you already had locally - you can tell because HEAD points to your current branch or commit. The line (or lines) between the lines beginning ======= and >>>>>>>:

=======
Goodbye
>>>>>>> 77976da35a11db4580b80ae27e8d65caf5208086:file.txt

... is what was introduced by the other (pulled) commit, in this case 77976da35a11. That is the object name (or "hash", "SHA1sum", etc.) of the commit that was merged into HEAD. All objects in git, whether they're commits (version), blobs (files), trees (directories) or tags have such an object name, which identifies them uniquely based on their content.

Html.ActionLink as a button or an image, not a link

Just found this extension to do it - simple and effective.

top nav bar blocking top content of the page

with navbar navbar-default everything works fine, but if you are using navbar-fixed-top you have to include custom style body { padding-top: 60px;} otherwise it will block content underneath.

Datatables Select All Checkbox

You can use this option provided by dataTable itself using buttons.

dom: 'Bfrtip',
 buttons: [
      'selectAll',
      'selectNone'
 ]'

Here is a sample code

var tableFaculty = $('#tableFaculty').DataTable({
    "columns": [
        {
            data: function (row, type, set) {
                return '';
            }
        },
        {data: "NAME"}
    ],
    "columnDefs": [
        {
            orderable: false,
            className: 'select-checkbox',
            targets: 0
        }
    ],
    select: {
        style: 'multi',
        selector: 'td:first-child'
    },
    dom: 'Bfrtip',
    buttons: [
        'selectAll',
        'selectNone'
    ],
    "order": [[0, 'desc']]
});

Validating a Textbox field for only numeric input.

I know this is an old question but I figured out I should pitch my answer anyways.

The following snippet iterates through each character of the text and uses the IsNumber() method, which returns true if the character is a number and false the other way, to check if all the characters are numbers. If all are numbers, the method returns true. If not it returns false.

using System;

private bool ValidateText(string text){
    char[] characters = text.ToCharArray();

    foreach(char c in characters){
        if(!char.IsNumber(c))
            return false;
    }
    return true;
}

Twitter bootstrap hide element on small devices

For Bootstrap 4.0 there is a change

See the docs: https://getbootstrap.com/docs/4.0/utilities/display/

In order to hide the content on mobile and display on the bigger devices you have to use the following classes:

d-none d-sm-block

The first class set display none all across devices and the second one display it for devices "sm" up (you could use md, lg, etc. instead of sm if you want to show on different devices.

I suggest to read about that before migration:

https://getbootstrap.com/docs/4.0/migration/#responsive-utilities

MySQL's now() +1 day

better use quoted `data` and `date`. AFAIR these may be reserved words my version is:

INSERT INTO `table` ( `data` , `date` ) VALUES('".$date."',NOW()+INTERVAL 1 DAY);

How to convert array into comma separated string in javascript

Use the join method from the Array type.

a.value = [a, b, c, d, e, f];
var stringValueYouWant = a.join();

The join method will return a string that is the concatenation of all the array elements. It will use the first parameter you pass as a separator - if you don't use one, it will use the default separator, which is the comma.

What is char ** in C?

Technically, the char* is not an array, but a pointer to a char.

Similarly, char** is a pointer to a char*. Making it a pointer to a pointer to a char.

C and C++ both define arrays behind-the-scenes as pointer types, so yes, this structure, in all likelihood, is array of arrays of chars, or an array of strings.

How can I run a directive after the dom has finished rendering?

I had the a similar problem and want to share my solution here.

I have the following HTML:

<div data-my-directive>
  <div id='sub' ng-include='includedFile.htm'></div>
</div>

Problem: In the link-function of directive of the parent div I wanted to jquery'ing the child div#sub. But it just gave me an empty object because ng-include hadn't finished when link function of directive ran. So first I made a dirty workaround with $timeout, which worked but the delay-parameter depended on client speed (nobody likes that).

Works but dirty:

app.directive('myDirective', [function () {
    var directive = {};
    directive.link = function (scope, element, attrs) {
        $timeout(function() {
            //very dirty cause of client-depending varying delay time 
            $('#sub').css(/*whatever*/);
        }, 350);
    };
    return directive;
}]);

Here's the clean solution:

app.directive('myDirective', [function () {
    var directive = {};
    directive.link = function (scope, element, attrs) {
        scope.$on('$includeContentLoaded', function() {
            //just happens in the moment when ng-included finished
            $('#sub').css(/*whatever*/);
        };
    };
    return directive;
}]);

Maybe it helps somebody.

Python 3: ImportError "No Module named Setuptools"

A few years ago I inherited a python (2.7.1) project running under Django-1.2.3 and now was asked to enhance it with QR possibilities. Got the same problem and did not find pip or apt-get either. So I solved it in a totally different but easy way. I /bin/vi-ed the setup.py and changed the line "from setuptools import setup" into: "from distutils.core import setup" That did it for me, so I thought I should post this for other users running old pythons. Regards, Roger Vermeir

How to uninstall jupyter

Try pip uninstall jupyter_core. Details below:

I ran into a similar issue when my jupyter notebook only showed Python 2 notebook. (no Python 3 notebook)

I tried to uninstall jupyter by pip unistall jupyter, pi3 uninstall jupyter, and the suggested pip-autoremove jupyter -y.

Nothing worked. I ran which jupyter, and got /home/ankit/.local/bin/jupyter

The file /home/ankit/.local/bin/jupyter was just a simple python code:

#!/usr/bin/python3

# -*- coding: utf-8 -*-
import re
import sys

from jupyter_core.command import main

if __name__ == '__main__':
    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
    sys.exit(main())

Tried to uninstall the module jupyter_core by pip uninstall jupyter_core and it worked.

Reinstalled jupyter with pip3 install jupyter and everything was back to normal.

How to create a shortcut using PowerShell

I don't know any native cmdlet in powershell but you can use com object instead:

$WshShell = New-Object -comObject WScript.Shell
$Shortcut = $WshShell.CreateShortcut("$Home\Desktop\ColorPix.lnk")
$Shortcut.TargetPath = "C:\Program Files (x86)\ColorPix\ColorPix.exe"
$Shortcut.Save()

you can create a powershell script save as set-shortcut.ps1 in your $pwd

param ( [string]$SourceExe, [string]$DestinationPath )

$WshShell = New-Object -comObject WScript.Shell
$Shortcut = $WshShell.CreateShortcut($DestinationPath)
$Shortcut.TargetPath = $SourceExe
$Shortcut.Save()

and call it like this

Set-ShortCut "C:\Program Files (x86)\ColorPix\ColorPix.exe" "$Home\Desktop\ColorPix.lnk"

If you want to pass arguments to the target exe, it can be done by:

#Set the additional parameters for the shortcut  
$Shortcut.Arguments = "/argument=value"

before $Shortcut.Save().

For convenience, here is a modified version of set-shortcut.ps1. It accepts arguments as its second parameter. 

param ( [string]$SourceExe, [string]$ArgumentsToSourceExe, [string]$DestinationPath )
$WshShell = New-Object -comObject WScript.Shell
$Shortcut = $WshShell.CreateShortcut($DestinationPath)
$Shortcut.TargetPath = $SourceExe
$Shortcut.Arguments = $ArgumentsToSourceExe
$Shortcut.Save()

Go doing a GET request and building the Querystring

Use r.URL.Query() when you appending to existing query, if you are building new set of params use the url.Values struct like so

package main

import (
    "fmt"
    "log"
    "net/http"
    "net/url"
    "os"
)

func main() {
    req, err := http.NewRequest("GET","http://api.themoviedb.org/3/tv/popular", nil)
    if err != nil {
        log.Print(err)
        os.Exit(1)
    }

    // if you appending to existing query this works fine 
    q := req.URL.Query()
    q.Add("api_key", "key_from_environment_or_flag")
    q.Add("another_thing", "foo & bar")

    // or you can create new url.Values struct and encode that like so
    q := url.Values{}
    q.Add("api_key", "key_from_environment_or_flag")
    q.Add("another_thing", "foo & bar")

    req.URL.RawQuery = q.Encode()

    fmt.Println(req.URL.String())
    // Output:
    // http://api.themoviedb.org/3/tv/popularanother_thing=foo+%26+bar&api_key=key_from_environment_or_flag
}

Clearing Magento Log Data

 
SET FOREIGN_KEY_CHECKS=0;
TRUNCATE dataflow_batch_export;
TRUNCATE dataflow_batch_import;
TRUNCATE log_customer;
TRUNCATE log_quote;
TRUNCATE log_summary;
TRUNCATE log_summary_type;
TRUNCATE log_url;
TRUNCATE log_url_info;
TRUNCATE log_visitor;
TRUNCATE log_visitor_info;
TRUNCATE log_visitor_online;
TRUNCATE report_viewed_product_index;
TRUNCATE report_compared_product_index;
TRUNCATE report_event;
TRUNCATE index_event;
SET FOREIGN_KEY_CHECKS=1;

TypeError: expected string or buffer

'lines' term from your snippet consists of set of strings.

 lines = f.readlines()
 match = re.findall('[A-Z]+', lines)

You cannot send entire lines into the re.findall('pattern',<string>)

You can try to send line by line

 for i in lines:
  match = re.findall('[A-Z]+', i)
  print match

or to convert the entire lines collection into single line (each line seperated by space)

 NEW_LIST=' '.join(lines)
 match=re.findall('[A-Z]+' ,NEW_LIST)
 print match

This might help you

How to set scope property with ng-init?

Just set ng-init as a function. You should not have to use watch. 

<body ng-controller="MainCtrl" ng-init="init()">
  <div ng-init="init('Blah')">{{ testInput }}</div>
</body>

app.controller('MainCtrl', ['$scope', function ($scope) {
  $scope.testInput = null;
  $scope.init = function(value) {
    $scope.testInput= value;
  }
}]);

Here's an example.

Plunker

AngularJS Folder Structure

I'm on my third angularjs app and the folder structure has improved every time so far. I keep mine simple right now. 

index.html (or .php)
/resources
  /css
  /fonts
  /images
  /js
    /controllers
    /directives
    /filters
    /services
  /partials (views)

I find that good for single apps. I haven't really had a project yet where I'd need multiple.

How to style a div to be a responsive square?

HTML

<div class='square-box'>
    <div class='square-content'>
        <h3>test</h3>
    </div>
</div>

CSS

.square-box{
    position: relative;
    width: 50%;
    overflow: hidden;
    background: #4679BD;
}
.square-box:before{
    content: "";
    display: block;
    padding-top: 100%;
}
.square-content{
    position:  absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    color: white;
    text-align: center;
}

http://jsfiddle.net/38Tnx/1425/

Convert date to another timezone in JavaScript

I should note that I am restricted with respect to which external libraries that I can use. moment.js and timezone-js were NOT an option for me.

The js date object that I have is in UTC. I needed to get the date AND time from this date in a specific timezone('America/Chicago' in my case). 

 var currentUtcTime = new Date(); // This is in UTC

 // Converts the UTC time to a locale specific format, including adjusting for timezone.
 var currentDateTimeCentralTimeZone = new Date(currentUtcTime.toLocaleString('en-US', { timeZone: 'America/Chicago' }));

 console.log('currentUtcTime: ' + currentUtcTime.toLocaleDateString());
 console.log('currentUtcTime Hour: ' + currentUtcTime.getHours());
 console.log('currentUtcTime Minute: ' + currentUtcTime.getMinutes());
 console.log('currentDateTimeCentralTimeZone: ' +        currentDateTimeCentralTimeZone.toLocaleDateString());
 console.log('currentDateTimeCentralTimeZone Hour: ' + currentDateTimeCentralTimeZone.getHours());
 console.log('currentDateTimeCentralTimeZone Minute: ' + currentDateTimeCentralTimeZone.getMinutes());

UTC is currently 6 hours ahead of 'America/Chicago'. Output is:

currentUtcTime: 11/25/2016
currentUtcTime Hour: 16
currentUtcTime Minute: 15

currentDateTimeCentralTimeZone: 11/25/2016
currentDateTimeCentralTimeZone Hour: 10
currentDateTimeCentralTimeZone Minute: 15

How to ignore files/directories in TFS for avoiding them to go to central source repository?

For TFS 2013:

Start in VisualStudio-Team Explorer, in the PendingChanges Dialog undo the Changes whith the state [add], which should be ignored.

Visual Studio will detect the Add(s) again. Click On "Detected: x add(s)"-in Excluded Changes

In the opened "Promote Cadidate Changes"-Dialog You can easy exclude Files and Folders with the Contextmenu. Options are:

  • Ignore this item
  • Ignore by extension
  • Ignore by file name
  • Ignore by ffolder (yes ffolder, TFS 2013 Update 4/Visual Studio 2013 Premium Update 4)

Don't forget to Check In the changed .tfignore-File.

For VS 2015/2017:

The same procedure: In the "Excluded Changes Tab" in TeamExplorer\Pending Changes click on Detected: xxx add(s)

The Excluded Changes Tab in TeamExplorer\Pending Changes

The "Promote Candidate Changes" Dialog opens, and on the entries you can Right-Click for the Contextmenu. Typo is fixed now :-)

C++ style cast from unsigned char * to const char *

char * and const unsigned char * are considered unrelated types. So you want to use reinterpret_cast.

But if you were going from const unsigned char* to a non const type you'd need to use const_cast first. reinterpret_cast cannot cast away a const or volatile qualification.

Can you style an html radio button to look like a checkbox?

Yes it can be done using this css, i've hidden the default radio button and made a custom radio button that looks like a checkbox.

_x000D_
_x000D_ 
.css-prp
{
  color: #17CBF2;
  font-family: arial;
}


.con1 {
  display: block;
  position: relative;
  padding-left: 25px;
  margin-bottom: 12px;
  cursor: pointer;
  font-size: 15px;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

/* Hide the browser's default radio button */
.con1 input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
}

/* Create a custom radio button */
.checkmark {
  position: absolute;
  top: 0;
  left: 0;
  height: 18px;
  width: 18px;
  background-color: lightgrey;
  border-radius: 10%;
}

/* When the radio button is checked, add a blue background */
.con1 input:checked ~ .checkmark {
  background-color: #17CBF2;
}
_x000D_ 
<label class="con1"><span>Yes</span>
  <input type="radio" name="radio1" checked>
  <span class="checkmark"></span>
</label>
<label class="con1"><span>No</span>
  <input type="radio" name="radio1">
  <span class="checkmark"></span>
</label>
_x000D_
_x000D_
_x000D_

CSS Animation and Display None

You can manage to have a pure CSS implementation with max-height

#main-image{
    max-height: 0;
    overflow: hidden;
    background: red;
   -prefix-animation: slide 1s ease 3.5s forwards;
}

@keyframes slide {
  from {max-height: 0;}
  to {max-height: 500px;}
}

You might have to also set padding, margin and border to 0, or simply padding-top, padding-bottom, margin-top and margin-bottom.

I updated the demo of Duopixel here : http://jsfiddle.net/qD5XX/231/

Body set to overflow-y:hidden but page is still scrollable in Chrome

Another solution I found to work is to set a mousewheel handler on the inside container and make sure it doesn't propagate by setting its last parameter to false and stopping the event bubble.

document.getElementById('content').addEventListener('mousewheel',function(evt){evt.cancelBubble=true;   if (evt.stopPropagation) evt.stopPropagation},false);

Scroll works fine in the inner container, but the event doesn't propagate to the body and so it does not scroll. This is in addition to setting the body properties overflow:hidden and height:100%.

Create comma separated strings C#?

You can use the string.Join method to do something like string.Join(",", o.Number, o.Id, o.whatever, ...).

edit: As digEmAll said, string.Join is faster than StringBuilder. They use an external implementation for the string.Join.

Profiling code (of course run in release without debug symbols):

class Program
{
    static void Main(string[] args)
    {
        Stopwatch sw = new Stopwatch();
        string r;
        int iter = 10000;

        string[] values = { "a", "b", "c", "d", "a little bit longer please", "one more time" };

        sw.Restart();
        for (int i = 0; i < iter; i++)
            r = Program.StringJoin(",", values);
        sw.Stop();
        Console.WriteLine("string.Join ({0} times): {1}ms", iter, sw.ElapsedMilliseconds);

        sw.Restart();
        for (int i = 0; i < iter; i++)
            r = Program.StringBuilderAppend(",", values);
        sw.Stop();
        Console.WriteLine("StringBuilder.Append ({0} times): {1}ms", iter, sw.ElapsedMilliseconds);
        Console.ReadLine();
    }

    static string StringJoin(string seperator, params string[] values)
    {
        return string.Join(seperator, values);
    }

    static string StringBuilderAppend(string seperator, params string[] values)
    {
        StringBuilder builder = new StringBuilder();
        builder.Append(values[0]);
        for (int i = 1; i < values.Length; i++)
        {
            builder.Append(seperator);
            builder.Append(values[i]);
        }
        return builder.ToString();
    }
}

string.Join took 2ms on my machine and StringBuilder.Append 5ms. So there is noteworthy difference. Thanks to digAmAll for the hint.

Printing the last column of a line in a file

One way using awk:

tail -f file.txt | awk '/A1/ { print $NF }'

How to convert number of minutes to hh:mm format in TSQL?

Thanks to A Ghazal, just what I needed. Here's a slightly cleaned up version of his(her) answer:

create FUNCTION [dbo].[fnMinutesToDuration]
(
    @minutes int 
)
RETURNS nvarchar(30)

-- Based on http://stackoverflow.com/questions/17733616/how-to-convert-number-of-minutes-to-hhmm-format-in-tsql

AS

BEGIN

return rtrim(isnull(cast(nullif((@minutes / 60)
                                , 0
                               ) as varchar
                        ) + 'h '
                    ,''
                   )
            + isnull(CAST(nullif((@minutes % 60)
                                 ,0
                                ) AS VARCHAR(2)
                         ) + 'm'
                     ,''
                    )
            )

end

CSS getting text in one line rather than two

The best way to use is white-space: nowrap; This will align the text to one line.

Dynamic instantiation from string name of a class in dynamically imported module?

Use getattr to get an attribute from a name in a string. In other words, get the instance as

instance = getattr(modul, class_name)()

Sql connection-string for localhost server

You can also use Dot(.) for local key i.e;

Data Source=.\SQLEXPRESS;Initial Catalog=master;Integrated Security=True

If you have the default server instance i.e. MSSQLSERVER, then just use dot for Data Source.

Data Source=.;Initial Catalog=master;Integrated Security=True

@angular/material/index.d.ts' is not a module

And also ng update @angular/material will update your code and fix all imports

How can I transform string to UTF-8 in C#?

@anothershrubery answer worked for me. I've made an enhancement using StringEntensions Class so I can easily convert any string at all in my program.

Method:

public static class StringExtensions
{
    public static string ToUTF8(this string text)
    {
        return Encoding.UTF8.GetString(Encoding.Default.GetBytes(text));
    }
}

Usage:

string myString = "Acción";
string strConverted = myString.ToUTF8();

Or simply:

string strConverted = "Acción".ToUTF8();

ValueError: all the input arrays must have same number of dimensions

(n,) and (n,1) are not the same shape. Try casting the vector to an array by using the [:, None] notation:

n_lists = np.append(n_list_converted, n_last[:, None], axis=1)

Alternatively, when extracting n_last you can use

n_last = n_list_converted[:, -1:]

to get a (20, 1) array.

How do I clone a job in Jenkins?

You can clone a job:

  1. Click on 'New Item' link
  2. Give a new name for your job
  3. Select radio button 'Copy existing Item'
  4. Give the job name that you want to clone
  5. Click 'OK'

Finally, you have your new job, which reflects all features of your cloned one.

Include of non-modular header inside framework module

Allow Non-modular Includes in Framework Modules only work in objc code. not work in swift.

After a period of research, I found that swift can pass warning parameter to clang, so set OTHER_SWIFT_FLAGS to -Xcc -Wno-error=non-modular-include-in-framework-module inhibit swift import error.

just for someone who have same problem

How to expand 'select' option width after the user wants to select an option

I fixed my problem with the following code:

_x000D_
_x000D_ 
<div style="width: 180px; overflow: hidden;">_x000D_
   <select style="width: auto;" name="abc" id="10">_x000D_
     <option value="-1">AAAAAAAAAAA</option>_x000D_
     <option value="123">123</option>_x000D_
   </select>_x000D_
</div>
_x000D_
_x000D_
_x000D_

Hope it helps!

Array as session variable

Yes, you can put arrays in sessions, example:

$_SESSION['name_here'] = $your_array;

Now you can use the $_SESSION['name_here'] on any page you want but make sure that you put the session_start() line before using any session functions, so you code should look something like this:

 session_start();
 $_SESSION['name_here'] = $your_array;

Possible Example:

 session_start();
 $_SESSION['name_here'] = $_POST;

Now you can get field values on any page like this:

 echo $_SESSION['name_here']['field_name'];

As for the second part of your question, the session variables remain there unless you assign different array data:

 $_SESSION['name_here'] = $your_array;

Session life time is set into php.ini file.

More Info Here

When to use <span> instead <p>?

The <p> tag is a paragraph, and as such, it is a block element (as is, for instance, h1 and div), whereas span is an inline element (as, for instance, b and a)

Block elements by default create some whitespace above and below themselves, and nothing can be aligned next to them, unless you set a float attribute to them.

Inline elements deal with spans of text inside a paragraph. They typically have no margins, and as such, you cannot, for instance, set a width to it.

How to make a parent div auto size to the width of its children divs

Your interior <div> elements should likely both be float:left. Divs size to 100% the size of their container width automatically. Try using display:inline-block instead of width:auto on the container div. Or possibly float:left the container and also apply overflow:auto. Depends on what you're after exactly.

Cloning a private Github repo

I was using Android Studio to clone the project from GitHub private repository and two-factor authentication (2FA). I created a personal token as made in lzl124631x's answer.

Then I cloned the repo using an url like this: https://YourGitHubUsername:[email protected]/YourRepoPath.git

How do I display a MySQL error in PHP for a long query that depends on the user input?

Use below code to print the error code :

echo mysqli_errno($this->db_link);

Error code will give you better idea about the error.

More info can be found at https://www.techqura.com/techqura.php?post=How-to-display-MySQL-error-in-PHP&pid=8&website=techqura.com

Converting a column within pandas dataframe from int to string

 
In [16]: df = DataFrame(np.arange(10).reshape(5,2),columns=list('AB'))

In [17]: df
Out[17]: 
   A  B
0  0  1
1  2  3
2  4  5
3  6  7
4  8  9

In [18]: df.dtypes
Out[18]: 
A    int64
B    int64
dtype: object

Convert a series

In [19]: df['A'].apply(str)
Out[19]: 
0    0
1    2
2    4
3    6
4    8
Name: A, dtype: object

In [20]: df['A'].apply(str)[0]
Out[20]: '0'

Don't forget to assign the result back:

df['A'] = df['A'].apply(str)

Convert the whole frame

In [21]: df.applymap(str)
Out[21]: 
   A  B
0  0  1
1  2  3
2  4  5
3  6  7
4  8  9

In [22]: df.applymap(str).iloc[0,0]
Out[22]: '0'


df = df.applymap(str)

The PowerShell -and conditional operator

You can simplify it to

if ($user_sam -and $user_case) {
  ...
}

because empty strings coerce to $false (and so does $null, for that matter).

oracle diff: how to compare two tables?

In addition to some of the other answers provided, if you wanted to look at the differences in table structure with a table that might have the similar but differing structure, you could do this in multiple ways:

First - If using Oracle SQL Developer, you could run a describe on both tables to compare them: 

descr TABLE_NAME1
descr TABLE_NAME2

Second - The first solution may not be ideal for larger tables with a lot of columns. If you only want to see the differences in the data between the two tables, then as mentioned by several others, using the SQL Minus operator should do the job.

Third - If you are using Oracle SQL Developer, and you want to compare the table structure of two tables using different schemas you can do the following:

  1. Select "Tools"
  2. Select "Database Diff"
  3. Select "Source Connection"
  4. Select "Destination Connection"
  5. Select the "Standard Object Types" you want to compare
  6. Enter the "Table Name"
  7. Click "Next" until you reach "Finish"
  8. Click "Finish"
  9. NOTE: In steps 3 & 4 is where you would select the differing schemas in which the objects exist that you want to compare.

Fourth - If the tables two tables you wish to compare have more columns, are in the same schema, have no need to compare more than two tables and are unappealing to compare visually using the DESCR command you can use the following to compare the differences in the table structure: 

select 
     a.column_name    || ' | ' || b.column_name, 
     a.data_type      || ' | ' || b.data_type, 
     a.data_length    || ' | ' || b.data_length, 
     a.data_scale     || ' | ' || b.data_scale, 
     a.data_precision || ' | ' || b.data_precision
from 
     user_tab_columns a,
     user_tab_columns b
where 
     a.table_name = 'TABLE_NAME1' 
and  b.table_name = 'TABLE_NAME2'
and  ( 
       a.data_type      <> b.data_type     or 
       a.data_length    <> b.data_length   or 
       a.data_scale     <> b.data_scale    or 
       a.data_precision <> b.data_precision
     )
and a.column_name = b.column_name;

Scrollview vertical and horizontal in android

Playing with the code, you can put an HorizontalScrollView into an ScrollView. Thereby, you can have the two scroll method in the same view.

Source : http://androiddevblog.blogspot.com/2009/12/creating-two-dimensions-scroll-view.html

I hope this could help you.

How do I create a new column from the output of pandas groupby().sum()?

You want to use transform this will return a Series with the index aligned to the df so you can then add it as a new column:

In [74]:

df = pd.DataFrame({'Date': ['2015-05-08', '2015-05-07', '2015-05-06', '2015-05-05', '2015-05-08', '2015-05-07', '2015-05-06', '2015-05-05'], 'Sym': ['aapl', 'aapl', 'aapl', 'aapl', 'aaww', 'aaww', 'aaww', 'aaww'], 'Data2': [11, 8, 10, 15, 110, 60, 100, 40],'Data3': [5, 8, 6, 1, 50, 100, 60, 120]})
?
df['Data4'] = df['Data3'].groupby(df['Date']).transform('sum')
df
Out[74]:
   Data2  Data3        Date   Sym  Data4
0     11      5  2015-05-08  aapl     55
1      8      8  2015-05-07  aapl    108
2     10      6  2015-05-06  aapl     66
3     15      1  2015-05-05  aapl    121
4    110     50  2015-05-08  aaww     55
5     60    100  2015-05-07  aaww    108
6    100     60  2015-05-06  aaww     66
7     40    120  2015-05-05  aaww    121

How to create websockets server in PHP

I was in your shoes for a while and finally ended up using node.js, because it can do hybrid solutions like having web and socket server in one. So php backend can submit requests thru http to node web server and then broadcast it with websocket. Very efficiant way to go.

How to stop java process gracefully?

Thanks for you answers. Shutdown hooks seams like something that would work in my case. But I also bumped into the thing called Monitoring and Management beans:
http://java.sun.com/j2se/1.5.0/docs/guide/management/overview.html
That gives some nice possibilities, for remote monitoring, and manipulation of the java process. (Was introduced in Java 5)

Determine when a ViewPager changes pages

For ViewPager2, 

viewPager.registerOnPageChangeCallback(object : ViewPager2.OnPageChangeCallback() {
  override fun onPageSelected(position: Int) {
    super.onPageSelected(position)
  }
})

where OnPageChangeCallback is a static class with three methods:

onPageScrolled(int position, float positionOffset, @Px int positionOffsetPixels),
onPageSelected(int position), 
onPageScrollStateChanged(@ScrollState int state)

Message 'src refspec master does not match any' when pushing commits in Git

 
git push -u origin master
error: src refspec master does not match any.

For that you need to enter the commit message as follows and then push the code:

git commit -m "initial commit"

git push origin master

Successfully pushed to master.

PostgreSQL visual interface similar to phpMyAdmin?

Azure Data Studio with Postgres addin is the tool of choice to manage postgres databases for me. Check it out. https://docs.microsoft.com/en-us/sql/azure-data-studio/quickstart-postgres?view=sql-server-ver15

Example of multipart/form-data

Many thanks to @Ciro Santilli answer! I found that his choice for boundary is quite "unhappy" because all of thoose hyphens: in fact, as @Fake Name commented, when you are using your boundary inside request it comes with two more hyphens on front:

Example:

POST / HTTP/1.1
HOST: host.example.com
Cookie: some_cookies...
Connection: Keep-Alive
Content-Type: multipart/form-data; boundary=12345

--12345
Content-Disposition: form-data; name="sometext"

some text that you wrote in your html form ...
--12345
Content-Disposition: form-data; name="name_of_post_request" filename="filename.xyz"

content of filename.xyz that you upload in your form with input[type=file]
--12345
Content-Disposition: form-data; name="image" filename="picture_of_sunset.jpg"

content of picture_of_sunset.jpg ...
--12345--

I found on this w3.org page that is possible to incapsulate multipart/mixed header in a multipart/form-data, simply choosing another boundary string inside multipart/mixed and using that one to incapsulate data. At the end, you must "close" all boundary used in FILO order to close the POST request (like:

POST / HTTP/1.1
...
Content-Type: multipart/form-data; boundary=12345

--12345
Content-Disposition: form-data; name="sometext"

some text sent via post...
--12345
Content-Disposition: form-data; name="files"
Content-Type: multipart/mixed; boundary=abcde

--abcde
Content-Disposition: file; file="picture.jpg"

content of jpg...
--abcde
Content-Disposition: file; file="test.py"

content of test.py file ....
--abcde--
--12345--

Take a look at the link above.

How to check if function exists in JavaScript?

This simple jQuery code should do the trick:

if (jQuery.isFunction(functionName)) {
    functionName();
}

How to prevent vim from creating (and leaving) temporary files?

This answer applies to using gVim on Windows 10. I cannot guarantee the same results for other operating systems.

Add:

set nobackup
set noswapfile
set noundofile

To your _vimrc file.

Note: This is the direct answer to the question (for Windows 10) and probably not the safest thing to do (read the other answers), but this is the fastest solution in my case.

How to pass command-line arguments to a PowerShell ps1 file

After digging through the PowerShell documentation, I discovered some useful information about this issue. You can't use the $args if you used the param(...) at the beginning of your file; instead you will need to use $PSBoundParameters. I copy/pasted your code into a PowerShell script, and it worked as you'd expect in PowerShell version 2 (I am not sure what version you were on when you ran into this issue).

If you are using $PSBoundParameters (and this ONLY works if you are using param(...) at the beginning of your script), then it is not an array, it is a hash table, so you will need to reference it using the key / value pair.

param($p1, $p2, $p3, $p4)
$Script:args=""
write-host "Num Args: " $PSBoundParameters.Keys.Count
foreach ($key in $PSBoundParameters.keys) {
    $Script:args+= "`$$key=" + $PSBoundParameters["$key"] + "  "
}
write-host $Script:args

And when called with...

PS> ./foo.ps1 a b c d

The result is...

Num Args:  4
$p1=a  $p2=b  $p3=c  $p4=d

How to remove MySQL completely with config and library files?

With the command:

sudo apt-get remove --purge mysql\*

you can delete anything related to packages named mysql. Those commands are only valid on debian / debian-based linux distributions (Ubuntu for example).

You can list all installed mysql packages with the command:

sudo dpkg -l | grep -i mysql

For more cleanup of the package cache, you can use the command:

sudo apt-get clean

Also, remember to use the command:

sudo updatedb

Otherwise the "locate" command will display old data.

To install mysql again, use the following command:

sudo apt-get install libmysqlclient-dev mysql-client

This will install the mysql client, libmysql and its headers files.

To install the mysql server, use the command:

sudo apt-get install mysql-server

Making a cURL call in C#

Well if you are new to C# with cmd-line exp. you can use online sites like "https://curl.olsh.me/" or search curl to C# converter will returns site that could do that for you.

or if you are using postman you can use Generate Code Snippet only problem with Postman code generator is the dependency on RestSharp library.

Concatenation of strings in Lua

As other answers have said, the string concatenation operator in Lua is two dots.

Your simple example would be written like this:

filename = "checkbook"
filename = filename .. ".tmp"

However, there is a caveat to be aware of. Since strings in Lua are immutable, each concatenation creates a new string object and copies the data from the source strings to it. That makes successive concatenations to a single string have very poor performance.

The Lua idiom for this case is something like this:

function listvalues(s)
    local t = { }
    for k,v in ipairs(s) do
        t[#t+1] = tostring(v)
    end
    return table.concat(t,"\n")
end

By collecting the strings to be concatenated in an array t, the standard library routine table.concat can be used to concatenate them all up (along with a separator string between each pair) without unnecessary string copying.

Update: I just noticed that I originally wrote the code snippet above using pairs() instead of ipairs().

As originally written, the function listvalues() would indeed produce every value from the table passed in, but not in a stable or predictable order. On the other hand, it would include values who's keys were not positive integers in the span of 1 to #s. That is what pairs() does: it produces every single (key,value) pair stored in the table.

In most cases where you would be using something like listvaluas() you would be interested in preserving their order. So a call written as listvalues{13, 42, 17, 4} would produce a string containing those value in that order. However, pairs() won't do that, it will itemize them in some order that depends on the underlying implementation of the table data structure. It is known that the order not only depends on the keys, but also on the order in which the keys were inserted and other keys removed.

Of course ipairs() isn't a perfect answer either. It only enumerates those values of the table that form a "sequence". That is, those values who's keys form an unbroken block spanning from 1 to some upper bound, which is (usually) also the value returned by the # operator. (In many cases, the function ipairs() itself is better replaced by a simpler for loop that just counts from 1 to #s. This is the recommended practice in Lua 5.2 and in LuaJIT where the simpler for loop can be more efficiently implemented than the ipairs() iterator.)

If pairs() really is the right approach, then it is usually the case that you want to print both the key and the value. This reduces the concerns about order by making the data self-describing. Of course, since any Lua type (except nil and the floating point NaN) can be used as a key (and NaN can also be stored as a value) finding a string representation is left as an exercise for the student. And don't forget about trees and more complex structures of tables.

How might I convert a double to the nearest integer value?

You can also use function:

//Works with negative numbers now
static int MyRound(double d) {
  if (d < 0) {
    return (int)(d - 0.5);
  }
  return (int)(d + 0.5);
}

Depending on the architecture it is several times faster.

iPhone/iOS JSON parsing tutorial

Here's a link to my tutorial, which walks you through :

  • creating a JSON WCF Web Service from scratch (and the problems you'll want to avoid)
  • adapting it to read/write SQL Server data
  • getting an iOS 6 app to use the JSON servies.
  • using the JSON web services with JavaScript

http://mikesknowledgebase.com/pages/Services/WebServices-Page1.htm

All source code is provided, free of charge. Enjoy.

Windows could not start the SQL Server (MSSQLSERVER) on Local Computer... (error code 3417)

I was getting this error today. And above answers didn't help me. I was getting this error when I try to start the SQL Server(SQLEXPRESS) service in Services(services.msc).

When I checked the error log at the location C:\Program Files\Microsoft SQL Server\MSSQL13.SQLEXPRESS\MSSQL\Log, there was an entry related TCP/IP port.

2018-06-19 20:41:52.20 spid12s TDSSNIClient initialization failed with error 0x271d, status code 0xa. Reason: Unable to initialize the TCP/IP listener. An attempt was made to access a socket in a way forbidden by its access permissions.

Recently I was running a MSSQLEXPRESS image in my docker container, which was using the same TCP/IP port, that caused this issue.

enter image description here

So, what I did is, I just reset my TCP/IP by doing the below command.

netsh int ip reset resetlog.txt

enter image description here

Once the resetting is done, I had to restart the machine and when I try to start the SQLEXPRESS service again, it started successfully. Hope it helps.

Bootstrap 4, how to make a col have a height of 100%?

Although it is not a good solution but may solve your problem. You need to use position absolute in #yellow element!

_x000D_
_x000D_ 
#yellow {height: 100%; background: yellow; position: absolute; top: 0px; left: 0px;}_x000D_
.container-fluid {position: static !important;}
_x000D_ 
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous">_x000D_
<div class="container-fluid">_x000D_
  <div class="row justify-content-center">_x000D_
_x000D_
    <div class="col-4" id="yellow">_x000D_
      XXXX_x000D_
    </div>_x000D_
_x000D_
    <div class="col-10 col-sm-10 col-md-10 col-lg-8 col-xl-8">_x000D_
      Form Goes Here_x000D_
    </div>_x000D_
  </div>_x000D_
</div>_x000D_
<script src="https://code.jquery.com/jquery-3.1.1.slim.min.js" integrity="sha384-A7FZj7v+d/sdmMqp/nOQwliLvUsJfDHW+k9Omg/a/EheAdgtzNs3hpfag6Ed950n" crossorigin="anonymous"></script>_x000D_
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script>_x000D_
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script>
_x000D_
_x000D_
_x000D_

How do I add an element to a list in Groovy?

From the documentation:

We can add to a list in many ways:

assert [1,2] + 3 + [4,5] + 6 == [1, 2, 3, 4, 5, 6]
assert [1,2].plus(3).plus([4,5]).plus(6) == [1, 2, 3, 4, 5, 6]
    //equivalent method for +
def a= [1,2,3]; a += 4; a += [5,6]; assert a == [1,2,3,4,5,6]
assert [1, *[222, 333], 456] == [1, 222, 333, 456]
assert [ *[1,2,3] ] == [1,2,3]
assert [ 1, [2,3,[4,5],6], 7, [8,9] ].flatten() == [1, 2, 3, 4, 5, 6, 7, 8, 9]

def list= [1,2]
list.add(3) //alternative method name
list.addAll([5,4]) //alternative method name
assert list == [1,2,3,5,4]

list= [1,2]
list.add(1,3) //add 3 just before index 1
assert list == [1,3,2]
list.addAll(2,[5,4]) //add [5,4] just before index 2
assert list == [1,3,5,4,2]

list = ['a', 'b', 'z', 'e', 'u', 'v', 'g']
list[8] = 'x'
assert list == ['a', 'b', 'z', 'e', 'u', 'v', 'g', null, 'x']

You can also do:

def myNewList = myList << "fifth"

jQuery: Uncheck other checkbox on one checked

Try this

$("[id*='type']").click(
function () {
var isCheckboxChecked = this.checked;
$("[id*='type']").attr('checked', false);
this.checked = isCheckboxChecked;
});

To make it even more generic you can also find checkboxes by the common class implemented on them.

Modified...

New Array from Index Range Swift

This works for me:

var test = [1, 2, 3]
var n = 2
var test2 = test[0..<n]

Your issue could be with how you're declaring your array to begin with.

EDIT:

To fix your function, you have to cast your Slice to an array:

func aFunction(numbers: Array<Int>, position: Int) -> Array<Int> {
    var newNumbers = Array(numbers[0..<position])
    return newNumbers
}

// test
aFunction([1, 2, 3], 2) // returns [1, 2]

Does Java have a path joining method?

One way is to get system properties that give you the path separator for the operating system, this tutorial explains how. You can then use a standard string join using the file.separator.

Getting fb.me URL

You can use bit.ly api to create facebook short urls find the documentation here http://api.bitly.com

SELECT max(x) is returning null; how can I make it return 0?

Depends on what product you're using, but most support something like

SELECT IFNULL(MAX(X), 0, MAX(X)) AS MaxX FROM tbl WHERE XID = 1

or

SELECT CASE MAX(X) WHEN NULL THEN 0 ELSE MAX(X) FROM tbl WHERE XID = 1

cast_sender.js error: Failed to load resource: net::ERR_FAILED in Chrome

Apparently YouTube constantly polls for Google Cast scripts even if the extension isn't installed.

From one commenter:

... it appears that Chrome attempts to get cast_sender.js on pages that have YouTube content. I'm guessing when Chrome sees media that it can stream it attempts to access the Chromecast extension. When the extension isn't present, the error is thrown.

Read more

The only solution I've come across is to install the Google Cast extension, whether you need it or not. You may then hide the toolbar button.

For more information and updates, see this SO question. Here's the official issue.

HTML Best Practices: Should I use &rsquo; or the special keyboard shortcut?

Typographically, the correct glyph to use in sentence punctuation is the quote mark, both single (including for apostrophes) and double quotes. The straight-looking mark that we often see on the web is called a prime, which also comes in single and double varieties and has limited uses, mostly for measurements.

This article explains how to use them correctly.

How to randomize Excel rows

I usually do as you describe:
Add a separate column with a random value (=RAND()) and then perform a sort on that column.

Might be more complex and prettyer ways (using macros etc), but this is fast enough and simple enough for me.

Putting -moz-available and -webkit-fill-available in one width (css property)

CSS will skip over style declarations it doesn't understand. Mozilla-based browsers will not understand -webkit-prefixed declarations, and WebKit-based browsers will not understand -moz-prefixed declarations.

Because of this, we can simply declare width twice:

elem {
    width: 100%;
    width: -moz-available;          /* WebKit-based browsers will ignore this. */
    width: -webkit-fill-available;  /* Mozilla-based browsers will ignore this. */
    width: fill-available;
}

The width: 100% declared at the start will be used by browsers which ignore both the -moz and -webkit-prefixed declarations or do not support -moz-available or -webkit-fill-available.

SQLRecoverableException: I/O Exception: Connection reset

The error occurs on some RedHat distributions. The only thing you need to do is to run your application with parameter java.security.egd=file:///dev/urandom:

java -Djava.security.egd=file:///dev/urandom [your command]

How can I tell which button was clicked in a PHP form submit?

Are you asking in php or javascript.

If it is in php, give the name of that and use the post or get method, after that you can use the option of isset or that particular button name is checked to that value.

If it is in js, use getElementById for that

React js onClick can't pass value to method

this example might be little different from yours. but i can assure you that this is the best solution you can have for this problem. i have searched for days for a solution which has no performance issue. and finally came up with this one.

class HtmlComponent extends React.Component {
  constructor() {
    super();
    this.state={
       name:'MrRehman',
    };
    this.handleClick= this.handleClick.bind(this);
  }

  handleClick(event) {
    const { param } = e.target.dataset;
    console.log(param);
    //do what you want to do with the parameter
  }

  render() {
    return (
      <div>
        <h3 data-param="value what you wanted to pass" onClick={this.handleClick}>
          {this.state.name}
        </h3>
      </div>
    );
  }
}

UPDATE

incase you want to deal with objects that are supposed to be the parameters. you can use JSON.stringify(object) to convert to it to string and add to the data set. 

return (
   <div>
     <h3 data-param={JSON.stringify({name:'me'})} onClick={this.handleClick}>
        {this.state.name}
     </h3>
   </div>
);

Oracle 12c Installation failed to access the temporary location

Install it from CMD using the command 

setup.exe -ignorePrereq -J"-Doracle.install.client.validate.clientSupportedOSCheck=false"

Reference

What does the colon (:) operator do?

colon is using in for-each loop, Try this example,

import java.util.*;

class ForEachLoop
{
       public static void main(String args[])
       {`enter code here`
       Integer[] iray={1,2,3,4,5};
       String[] sray={"ENRIQUE IGLESIAS"};
       printME(iray);
       printME(sray);

       }
       public static void printME(Integer[] i)
       {           
                  for(Integer x:i)
                  {
                    System.out.println(x);
                  }
       }
       public static void printME(String[] i)
       {
                   for(String x:i)
                   {
                   System.out.println(x);
                   }
       }
}

Is there a way to make Firefox ignore invalid ssl-certificates?

Create some nice new 10 year certificates and install them. The procedure is fairly easy.

Start at (1B) Generate your own CA (Certificate Authority) on this web page: Creating Certificate Authorities and self-signed SSL certificates and generate your CA Certificate and Key. Once you have these, generate your Server Certificate and Key. Create a Certificate Signing Request (CSR) and then sign the Server Key with the CA Certificate. Now install your Server Certificate and Key on the web server as usual, and import the CA Certificate into Internet Explorer's Trusted Root Certification Authority Store (used by the Flex uploader and Chrome as well) and into Firefox's Certificate Manager Authorities Store on each workstation that needs to access the server using the self-signed, CA-signed server key/certificate pair.

You now should not see any warning about using self-signed Certificates as the browsers will find the CA certificate in the Trust Store and verify the server key has been signed by this trusted certificate. Also in e-commerce applications like Magento, the Flex image uploader will now function in Firefox without the dreaded "Self-signed certificate" error message.

Free Rest API to retrieve current datetime as string (timezone irrelevant)

If you're using Rails, you can just make an empty file in the public folder and use ajax to get that. Then parse the headers for the Date header. Files in the Public folder bypass the Rails stack, and so have lower latency.

How to avoid java.util.ConcurrentModificationException when iterating through and removing elements from an ArrayList

What about of 

import java.util.Collections;

List<A> abc = Collections.synchronizedList(new ArrayList<>());

Datetime in C# add days

Use this:

DateTime dateTime =  DateTime.Now;
DateTime? newDateTime = null;
TimeSpan numberOfDays = new TimeSpan(2, 0, 0, 0, 0);
newDateTime = dateTime.Add(numberOfDays);

How to display databases in Oracle 11g using SQL*Plus

Oracle does not have a simple database model like MySQL or MS SQL Server. I find the closest thing is to query the tablespaces and the corresponding users within them.

For example, I have a DEV_DB tablespace with all my actual 'databases' within them:

SQL> SELECT TABLESPACE_NAME FROM USER_TABLESPACES;

Resulting in:

SYSTEM
SYSAUX
UNDOTBS1
TEMP
USERS
EXAMPLE
DEV_DB

It is also possible to query the users in all tablespaces:

SQL> select USERNAME, DEFAULT_TABLESPACE from DBA_USERS;

Or within a specific tablespace (using my DEV_DB tablespace as an example):

SQL> select USERNAME, DEFAULT_TABLESPACE from DBA_USERS where DEFAULT_TABLESPACE = 'DEV_DB';

ROLES DEV_DB
DATAWARE DEV_DB
DATAMART DEV_DB
STAGING DEV_DB

Find files in a folder using Java

Consider Apache Commons IO, it has a class called FileUtils that has a listFiles method that might be very useful in your case.

How to get file name from file path in android

FilenameUtils to the rescue:

String filename = FilenameUtils.getName("/storage/sdcard0/DCIM/Camera/1414240995236.jpg");

iOS: How to store username/password within an app?

If you are having an issue retrieving the password using the keychain wrapper, use this code:

NSData *pass =[keychain objectForKey:(__bridge id)(kSecValueData)];
NSString *passworddecoded = [[NSString alloc] initWithData:pass
                                           encoding:NSUTF8StringEncoding];

Return multiple values to a method caller

Previous poster is right. You cannot return multiple values from a C# method. However, you do have a couple of options:

  • Return a structure that contains multiple members
  • Return an instance of a class
  • Use output parameters (using the out or ref keywords)
  • Use a dictionary or key-value pair as output

The pros and cons here are often hard to figure out. If you return a structure, make sure it's small because structs are value type and passed on the stack. If you return an instance of a class, there are some design patterns here that you might want to use to avoid causing problems - members of classes can be modified because C# passes objects by reference (you don't have ByVal like you did in VB).

Finally you can use output parameters but I would limit the use of this to scenarios when you only have a couple (like 3 or less) of parameters - otherwise things get ugly and hard to maintain. Also, the use of output parameters can be an inhibitor to agility because your method signature will have to change every time you need to add something to the return value whereas returning a struct or class instance you can add members without modifying the method signature.

From an architectural standpoint I would recommend against using key-value pairs or dictionaries. I find this style of coding requires "secret knowledge" in code that consumes the method. It must know ahead of time what the keys are going to be and what the values mean and if the developer working on the internal implementation changes the way the dictionary or KVP is created, it could easily create a failure cascade throughout the entire application.

Stopping a windows service when the stop option is grayed out

As Aaron mentioned above, some services do not accept SERVICE_ACCEPT_STOP messages, by the time it was developed. And that is hard coded into the executable. Period. A workaroud would be not to have it started, and as you cannot change its properties, forcibly do the following:

  1. Boot into safe mode (Windows 10 users might need msconfig > boot > safe boot)
  2. Regedit into HKLM > System > ControlSet001 > Services
  3. Locate your service entry
  4. Change 'Start' key to 3 (manual startup) or 4 (disabled)

If you cannot change the entry, right-click on your service name on the left pane, select 'Permissions', check that 'Everyone' has full access and try step 4 again.

Don't forget to disable safe boot from msconfig again, and reboot !

VB.Net: Dynamically Select Image from My.Resources

Sometimes you must change the name (or check to get it automatically from compiler).

Example:

Filename = amp2-rot.png

It is not working as:

PictureBoxName.Image = resources.GetObject("amp2-rot.png")

It works, just as amp2_rot for me:

 PictureBox_L1.Image = My.Resources.Resource.amp2_rot

getResources().getColor() is deprecated

You need to use ContextCompat.getColor(), which is part of the Support V4 Library (so it will work for all the previous API).

ContextCompat.getColor(context, R.color.my_color)

As specified in the documentation, "Starting in M, the returned color will be styled for the specified Context's theme". SO no need to worry about it.

You can add the Support V4 library by adding the following to the dependencies array inside your app build.gradle:

compile 'com.android.support:support-v4:23.0.1'

convert:not authorized `aaaa` @ error/constitute.c/ReadImage/453

The answer with highest votes (I have not enough reputation to add comment there) suggests to comment out the MVG line, but have in mind this:

CVE-2016-3714

ImageMagick supports ".svg/.mvg" files which means that attackers can craft code in a scripting language, e.g. MSL (Magick Scripting Language) and MVG (Magick Vector Graphics), upload it to a server disguised as an image file and force the software to run malicious commands on the server side as described above. For example adding the following commands in a file and uploading it to a webserver that uses a vulnerable ImageMagick version will result in running the command "ls -la" on the server.

exploit.jpg:

push graphic-context viewbox 0 0 640 480 fill 'url(https://website.com/image.png"|ls "-la)' pop graphic-context

And

Any version below 7.0.1-2 or 6.9.4-0 is potentially vulnerable and affected parties should as soon as possible upgrade to the latest ImageMagick version.

Source

How to make a phone call using intent in Android?

 
// Java
String mobileNumber = "99XXXXXXXX";
Intent intent = new Intent();
intent.setAction(Intent.ACTION_DIAL); // Action for what intent called for
intent.setData(Uri.parse("tel: " + mobileNumber)); // Data with intent respective action on intent
startActivity(intent);

// Kotlin
val mobileNumber = "99XXXXXXXX"
val intent = Intent()
intent.action = Intent.ACTION_DIAL // Action for what intent called for
intent.data = Uri.parse("tel: $mobileNumber") // Data with intent respective action on intent
startActivity(intent)

How to get String Array from arrays.xml file

Your XML is not entirely clear, but arrays XML can cause force closes if you make them numbers, and/or put white space in their definition.

Make sure they are defined like No Leading or Trailing Whitespace

How to correctly use the extern keyword in C

If each file in your program is first compiled to an object file, then the object files are linked together, you need extern. It tells the compiler "This function exists, but the code for it is somewhere else. Don't panic."

2 ways for "ClearContents" on VBA Excel, but 1 work fine. Why?

For numerical addressing of cells try to enable S1O1 checkbox in MS Excel settings. It is the second tab from top (i.e. Formulas), somewhere mid-page in my Hungarian version.

If enabled, it handles VBA addressing in both styles, i.e. Range("A1:B10") and Range(Cells(1, 1), Cells(10, 2)). I assume it handles Range("A1:B10") style only, if not enabled.

Good luck!

(Note, that Range("A1:B10") represents a 2x10 square, while Range(Cells(1, 1), Cells(10, 2)) represents 10x2. Using column numbers instead of letters will not affect the order of addresing.)

Django - taking values from POST request

For django forms you can do this;

form = UserLoginForm(data=request.POST) #getting the whole data from the user.
user = form.save() #saving the details obtained from the user.
username = user.cleaned_data.get("username") #where "username" in parenthesis is the name of the Charfield (the variale name i.e, username = forms.Charfield(max_length=64))

Location for session files in Apache/PHP

Another common default location besides /tmp/ is /var/lib/php5/

How can I change the value of the elements in a vector?

Well, you could always run a transform over the vector:

std::transform(v.begin(), v.end(), v.begin(), [mean](int i) -> int { return i - mean; });

You could always also devise an iterator adapter that returns the result of an operation applied to the dereference of its component iterator when it's dereferenced. Then you could just copy the vector to the output stream:

std::copy(adapter(v.begin(), [mean](int i) -> { return i - mean; }), v.end(), std::ostream_iterator<int>(cout, "\n"));

Or, you could use a for loop...but that's kind of boring.

Rename Files and Directories (Add Prefix)

If you have Ruby(1.9+)

ruby -e 'Dir["*"].each{|x| File.rename(x,"PRE_"+x) }'

Abstract class in Java

Solution - base class (abstract)

public abstract class Place {

String Name;
String Postcode;
String County;
String Area;

Place () {

        }

public static Place make(String Incoming) {
        if (Incoming.length() < 61) return (null);

        String Name = (Incoming.substring(4,26)).trim();
        String County = (Incoming.substring(27,48)).trim();
        String Postcode = (Incoming.substring(48,61)).trim();
        String Area = (Incoming.substring(61)).trim();

        Place created;
        if (Name.equalsIgnoreCase(Area)) {
                created = new Area(Area,County,Postcode);
        } else {
                created = new District(Name,County,Postcode,Area);
        }
        return (created);
        }

public String getName() {
        return (Name);
        }

public String getPostcode() {
        return (Postcode);
        }

public String getCounty() {
        return (County);
        }

public abstract String getArea();

}

How do I decompile a .NET EXE into readable C# source code?

I'm surprised no one has mentioned dnSpy. dnSpy is a debugger and .NET assembly editor. You can use it to edit and debug assemblies even if you don't have any source code available.

Main features:

  • Debug .NET and Unity assemblies
  • Edit .NET and Unity assemblies
  • Light and dark themes

It is open source and one of most widely used reverse engineering tool for dot net.

Changing the child element's CSS when the parent is hovered

Use toggleClass().

$('.parent').hover(function(){
$(this).find('.child').toggleClass('color')
});

where color is the class. You can style the class as you like to achieve the behavior you want. The example demonstrates how class is added and removed upon mouse in and out.

Check Working example here.

How to pass in parameters when use resource service?

I think I see your problem, you need to use the @ syntax to define parameters you will pass in this way, also I'm not sure what loginID or password are doing you don't seem to define them anywhere and they are not being used as URL parameters so are they being sent as query parameters?

This is what I can suggest based on what I see so far:

.factory('MagComments', function ($resource) {
    return $resource('http://localhost/dooleystand/ci/api/magCommenct/:id', {
      loginID : organEntity,
      password : organCommpassword,
      id : '@magId'
    });
  })

The @magId string will tell the resource to replace :id with the property magId on the object you pass it as parameters.

I'd suggest reading over the documentation here (I know it's a bit opaque) very carefully and looking at the examples towards the end, this should help a lot.

How to send a message to a particular client with socket.io

You can refer to socket.io rooms. When you handshaked socket - you can join him to named room, for instance "user.#{userid}".

After that, you can send private message to any client by convenient name, for instance:

io.sockets.in('user.125').emit('new_message', {text: "Hello world"})

In operation above we send "new_message" to user "125".

thanks.

Unicode via CSS :before

The code points used in icon font tricks are usually Private Use code points, which means that they have no generally defined meaning and should not be used in open information interchange, only by private agreement between interested parties. However, Private Use code points can be represented as any other Unicode value, e.g. in CSS using a notation like \f066, as others have answered. You can even enter the code point as such, if your document is UTF-8 encoded and you know how to type an arbitrary Unicode value by its number in your authoring environment (but of course it would normally be displayed using a symbol for an unknown character).

However, this is not the normal way of using icon fonts. Normally you use a CSS file provided with the font and use constructs like <span class="icon-resize-small">foo</span>. The CSS code will then take care of inserting the symbol at the start of the element, and you don’t need to know the code point number.

Generate fixed length Strings filled with whitespaces

This simple function works for me:

public static String leftPad(String string, int length, String pad) {
      return pad.repeat(length - string.length()) + string;
    }

Invocation:

String s = leftPad(myString, 10, "0");

Is there an embeddable Webkit component for Windows / C# development?

There's a WebKit-Sharp component on Mono's Subversion Server. I can't find any web-viewable documentation on it, and I'm not even sure if it's WinForms or GTK# (can't grab the source from here to check at the moment), but it's probably your best bet, either way.

I think this component is CLI wrapper around webkit for Ubuntu. So this wrapper most likely could be not working on win32

Try check another variant - project awesomium - wrapper around google project "Chromium" that use webkit. Also awesomium has features like to should interavtive web pages on 3D objects under WPF

How to convert a UTF-8 string into Unicode?

What you have seems to be a string incorrectly decoded from another encoding, likely code page 1252, which is US Windows default. Here's how to reverse, assuming no other loss. One loss not immediately apparent is the non-breaking space (U+00A0) at the end of your string that is not displayed. Of course it would be better to read the data source correctly in the first place, but perhaps the data source was stored incorrectly to begin with.

using System;
using System.Text;

class Program
{
    static void Main(string[] args)
    {
        string junk = "déjÃ\xa0";  // Bad Unicode string

        // Turn string back to bytes using the original, incorrect encoding.
        byte[] bytes = Encoding.GetEncoding(1252).GetBytes(junk);

        // Use the correct encoding this time to convert back to a string.
        string good = Encoding.UTF8.GetString(bytes);
        Console.WriteLine(good);
    }
}

Result:

déjà

Do C# Timers elapse on a separate thread?

It depends. The System.Timers.Timer has two modes of operation.

If SynchronizingObject is set to an ISynchronizeInvoke instance then the Elapsed event will execute on the thread hosting the synchronizing object. Usually these ISynchronizeInvoke instances are none other than plain old Control and Form instances that we are all familiar with. So in that case the Elapsed event is invoked on the UI thread and it behaves similar to the System.Windows.Forms.Timer. Otherwise, it really depends on the specific ISynchronizeInvoke instance that was used.

If SynchronizingObject is null then the Elapsed event is invoked on a ThreadPool thread and it behaves similar to the System.Threading.Timer. In fact, it actually uses a System.Threading.Timer behind the scenes and does the marshaling operation after it receives the timer callback if needed.

Selenium using Java - The path to the driver executable must be set by the webdriver.gecko.driver system property

in my case, I must to set path in properties file, in many hours I find the way:

application.properties file:

webdriver.gecko.driver="/lib/geckodriver-v0.26.0-win64/geckodriver.exe"

in java code:

private static final Logger log = Logger.getLogger(Login.class.getName());
private FirefoxDriver driver;
private FirefoxProfile firefoxProfile;
private final String BASE_URL = "https://www.myweb.com/";
private static final String RESOURCE_NAME = "main/resources/application.properties"; // could also be a constant
private Properties properties;

public Login() {
    init();
}

private void init() {
    properties = new Properties();
    try(InputStream resourceStream = getClass().getClassLoader().getResourceAsStream(RESOURCE_NAME)) {
        properties.load(resourceStream);
    } catch (IOException e) {
        System.err.println("Could not open Config file");
        log.log(Level.SEVERE, "Could not open Config file", e);
    }
    // open incognito tab by default
    firefoxProfile = new FirefoxProfile();
    firefoxProfile.setPreference("browser.privatebrowsing.autostart", true);
    // geckodriver driver path to run
    String gekoDriverPath = properties.getProperty("webdriver.gecko.driver");
    log.log(Level.INFO, gekoDriverPath);
    System.setProperty("webdriver.gecko.driver", System.getProperty("user.dir") + gekoDriverPath);
    log.log(Level.INFO, System.getProperty("webdriver.gecko.driver"));
    System.setProperty("webdriver.gecko.driver", System.getProperty("webdriver.gecko.driver").replace("\"", ""));
    if (driver == null) {
        driver = new FirefoxDriver();
    }

}

How to add a new column to a CSV file?

I'm surprised no one suggested Pandas. Although using a set of dependencies like Pandas might seem more heavy-handed than is necessary for such an easy task, it produces a very short script and Pandas is a great library for doing all sorts of CSV (and really all data types) data manipulation. Can't argue with 4 lines of code:

import pandas as pd
csv_input = pd.read_csv('input.csv')
csv_input['Berries'] = csv_input['Name']
csv_input.to_csv('output.csv', index=False)

Check out Pandas Website for more information!

Contents of output.csv:

Name,Code,Berries
blackberry,1,blackberry
wineberry,2,wineberry
rasberry,1,rasberry
blueberry,1,blueberry
mulberry,2,mulberry

Array of strings in groovy

If you really want to create an array rather than a list use either

String[] names = ["lucas", "Fred", "Mary"]

or

def names = ["lucas", "Fred", "Mary"].toArray()

Rails - Could not find a JavaScript runtime?

Note from Michael 12/28/2011 - I have changed my accept from this (rubytheracer) to above (nodejs) as therubyracer has code size issues. Heroku now strongly discourage it. It will 'work' but may have size/performance issues.

If you add a runtime, such as therubyracer to your Gemfile and run bundle then try and start the server it should work.

gem 'therubyracer'

A javascript runtime is required for compiling coffeescript and also for uglifier.

Update, 12/12/2011: Some folks found issues with rubytheracer (I think it was mostly code size). They found execjs (or nodejs) worked just as well (if not better) and were much smaller.

n.b. Coffeescript became a standard for 3.1+

Telling gcc directly to link a library statically

It is possible of course, use -l: instead of -l. For example -l:libXYZ.a to link with libXYZ.a. Notice the lib written out, as opposed to -lXYZ which would auto expand to libXYZ.

How to retrieve the first word of the output of a command in bash?

I was working with a embedded device which had neither perl, awk or python and did it with sed instead. It supports multiple spaces before the first word (which the cut and bash solutions did not handle).

VARIABLE="  first_word_with_spaces_before_and_after  another_word  "
echo $VARIABLE | sed 's/ *\([^ ]*\).*/\1/'

This was very useful when grepping ps for process IDs since the other solutions here using only bash was not able to remove the first spaces which ps uses to align.

Twitter Bootstrap Form File Element Upload Button

I thought I'd add my threepence worth, just to say how the default .custom-file-label and custom-file-input BS4 file input and how that can be used.

The latter class is on the input group and is not visible. While the former is the visible label and has a :after pseudoelement that looks like a button.

<div class="custom-file">
<input type="file" class="custom-file-input" id="upload">
<label class="custom-file-label" for="upload">Choose file</label>
</div>

You cannot add classes to psuedoelements, but you can style them in CSS (or SASS).

.custom-file-label:after {
    color: #fff;
    background-color: #1e7e34;
    border-color: #1c7430;
    pointer: cursor;
}

In Java, remove empty elements from a list of Strings

 
   private List cleanInputs(String[] inputArray) {
        List<String> result = new ArrayList<String>(inputArray.length);
        for (String input : inputArray) {
            if (input != null) {
                String str = input.trim();
                if (!str.isEmpty()) {
                    result.add(str);
                }
            }
        }
        return result;
    }

How to get a microtime in Node.js?

There's also https://github.com/wadey/node-microtime:

> var microtime = require('microtime')
> microtime.now()
1297448895297028

Adb install failure: INSTALL_CANCELED_BY_USER

For MIUI OS Device

1) Go to Setting

2) Scroll down to Additional Setting

3) You will find Developer option at bottom

4) Turn this on - Install via USB: Toggle On

By turning this on, It is working charm in my MIUI8 device.

How do I call paint event?

Maybe this is an old question and that´s the reason why these answers didn't work for me ... using Visual Studio 2019, after some investigating, this is the solution I've found:

this.InvokePaint(this, new PaintEventArgs(this.CreateGraphics(), this.DisplayRectangle));

Illegal mix of collations error in MySql
  • Check that your users.gender column is an INTEGER.
  • Try: alter table users convert to character set latin1 collate latin1_swedish_ci;

How to generate a Makefile with source in sub-directories using just one makefile

Usually, you create a Makefile in each subdirectory, and write in the top-level Makefile to call make in the subdirectories.

This page may help: http://www.gnu.org/software/make/

How to yum install Node.JS on Amazon Linux

For the v4 LTS version use:

curl --silent --location https://rpm.nodesource.com/setup_4.x | bash -
yum -y install nodejs

For the Node.js v6 use:

curl --silent --location https://rpm.nodesource.com/setup_6.x | bash -
yum -y install nodejs

I also ran into some problems when trying to install native addons on Amazon Linux. If you want to do this you should also install build tools:

yum install gcc-c++ make

How do I get the current timezone name in Postgres 9.3?

You can access the timezone by the following script:

SELECT * FROM pg_timezone_names WHERE name = current_setting('TIMEZONE');
  • current_setting('TIMEZONE') will give you Continent / Capital information of settings
  • pg_timezone_names The view pg_timezone_names provides a list of time zone names that are recognized by SET TIMEZONE, along with their associated abbreviations, UTC offsets, and daylight-savings status.
  • name column in a view (pg_timezone_names) is time zone name.

output will be :

name- Europe/Berlin, 
abbrev - CET, 
utc_offset- 01:00:00, 
is_dst- false

Initialize 2D array

You can follow what paxdiablo(on Dec '12) suggested for an automated, more versatile approach: 

for (int row = 0; row < 3; row ++)
for (int col = 0; col < 3; col++)
    table[row][col] = (char) ('1' + row * 3 + col);

In terms of efficiency, it depends on the scale of your implementation. If it is to simply initialize a 2D array to values 0-9, it would be much easier to just define, declare and initialize within the same statement like this: private char[][] table = {{'1', '2', '3'}, {'4', '5', '6'}, {'7', '8', '9'}};

Or if you're planning to expand the algorithm, the previous code would prove more, efficient.

Node.js Mongoose.js string to ObjectId function

 
var mongoose = require('mongoose');
var _id = mongoose.mongo.ObjectId("4eb6e7e7e9b7f4194e000001");

GnuPG: "decryption failed: secret key not available" error from gpg on Windows

when reimporting your keys from the old keyring, you need to specify the command:

gpg --allow-secret-key-import --import <keyring>

otherwise it will only import the public keys, not the private keys.

SoapFault exception: Could not connect to host

For me it was a certificate problem. Following worked for me

$context = stream_context_create([
    'ssl' => [
        // set some SSL/TLS specific options
        'verify_peer' => false,
        'verify_peer_name' => false,
        'allow_self_signed' => true
    ]
]);

$client  = new SoapClient(null, [
    'location' => 'https://...',
    'uri' => '...', 
    'stream_context' => $context
]);

Set up Python 3 build system with Sublime Text 3

If you are using PyQt, then for normal work, you should add "shell":"true" value, this looks like:

{
  "cmd": ["c:/Python32/python.exe", "-u", "$file"],
  "file_regex": "^[ ]*File \"(...*?)\", line ([0-9]*)",
  "selector": "source.python",
  "shell":"true"
}