Timeout jQuery effects

This can be done with only a few lines of jQuery:

$(function(){
    // make sure img is hidden - fade in
    $('img').hide().fadeIn(2000);

    // after 5 second timeout - fade out
    setTimeout(function(){$('img').fadeOut(2000);}, 5000);
});?

see the fiddle below for a working example...

How to send email from localhost WAMP Server to send email Gmail Hotmail or so forth?

Here is the BESTEST way to send emails using PHPmailer library, this is the only method that works for me.

require_once 'mailer/class.phpmailer.php';
    $mail = new PHPMailer(); // create a new object
    $mail->IsSMTP(); // enable SMTP
    $mail->SMTPDebug = 1; // debugging: 1 = errors and messages, 2 = messages only
    $mail->SMTPAuth = true; // authentication enabled
    $mail->SMTPSecure = 'ssl'; // secure transfer enabled REQUIRED for GMail
    $mail->Host = "smtp.gmail.com";
    $mail->Port = 465; // or 587
    $mail->IsHTML(true);
    $mail->Username = "[email protected]";
    $mail->Password = "xxxxxxx";
    $mail->SetFrom("[email protected]");
    $mail->AddAddress($to);
    $logfile = dirname(dirname(__FILE__)) . '/mail.log';
    try {
        $mail->Body = $message;
        $mail->Subject = $subject;


        file_put_contents($logfile, "Content: \n", FILE_APPEND);
        file_put_contents($logfile, $message . "\n\n", FILE_APPEND);

        if(!$mail->Send()) {
            echo "Mailer Error: " . $mail->ErrorInfo;
        } else {
            echo "Email has been sent";
        }
    } catch (Exception $e) {
        #print_r($e->getMessage());
        file_put_contents($logfile, "Error: \n", FILE_APPEND);
        file_put_contents($logfile, $e->getMessage() . "\n", FILE_APPEND);
        file_put_contents($logfile, $e->getTraceAsString() . "\n\n", FILE_APPEND);
    }

How can I reconcile detached HEAD with master/origin?

Instead of doing git checkout origin/master

just do git checkout master

then git branch will confirm your branch.

Check if starting characters of a string are alphabetical in T-SQL

You don't need to use regex, LIKE is sufficient:

WHERE my_field LIKE '[a-zA-Z][a-zA-Z]%'

Assuming that by "alphabetical" you mean only latin characters, not anything classified as alphabetical in Unicode.

Note - if your collation is case sensitive, it's important to specify the range as [a-zA-Z]. [a-z] may exclude A or Z. [A-Z] may exclude a or z.

ImportError: No module named model_selection

To install scikit-learn version 18.0, I used both commands:

conda update scikit-learn

pip install -U scikit-learn

But it does not work. There was a problem "Cannot install 'scikit-learn'. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall".

Finally, i can install it by using following command:

pip install --user --upgrade scikit-learn==0.18.0

AngularJS : The correct way of binding to a service properties

I think it's a better way to bind on the service itself instead of the attributes on it.

Here's why:

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.7/angular.min.js"></script>
<body ng-app="BindToService">

  <div ng-controller="BindToServiceCtrl as ctrl">
    ArrService.arrOne: <span ng-repeat="v in ArrService.arrOne">{{v}}</span>
    <br />
    ArrService.arrTwo: <span ng-repeat="v in ArrService.arrTwo">{{v}}</span>
    <br />
    <br />
    <!-- This is empty since $scope.arrOne never changes -->
    arrOne: <span ng-repeat="v in arrOne">{{v}}</span>
    <br />
    <!-- This is not empty since $scope.arrTwo === ArrService.arrTwo -->
    <!-- Both of them point the memory space modified by the `push` function below -->
    arrTwo: <span ng-repeat="v in arrTwo">{{v}}</span>
  </div>

  <script type="text/javascript">
    var app = angular.module("BindToService", []);

    app.controller("BindToServiceCtrl", function ($scope, ArrService) {
      $scope.ArrService = ArrService;
      $scope.arrOne = ArrService.arrOne;
      $scope.arrTwo = ArrService.arrTwo;
    });

    app.service("ArrService", function ($interval) {
      var that = this,
          i = 0;
      this.arrOne = [];
      that.arrTwo = [];

      $interval(function () {
        // This will change arrOne (the pointer).
        // However, $scope.arrOne is still same as the original arrOne.
        that.arrOne = that.arrOne.concat([i]);

        // This line changes the memory block pointed by arrTwo.
        // And arrTwo (the pointer) itself never changes.
        that.arrTwo.push(i);
        i += 1;
      }, 1000);

    });
  </script>
</body>

You can play it on this plunker.

T-SQL: Selecting rows to delete via joins

Yes you can. Example :

DELETE TableA 
FROM TableA AS a
INNER JOIN TableB AS b
ON a.BId = b.BId
WHERE [filter condition]

Calling stored procedure with return value

I had a similar problem with the SP call returning an error that an expected parameter was not included. My code was as follows.
Stored Procedure:

@Result int OUTPUT

And C#:

            SqlParameter result = cmd.Parameters.Add(new SqlParameter("@Result", DbType.Int32));
            result.Direction = ParameterDirection.ReturnValue;

In troubleshooting, I realized that the stored procedure was ACTUALLY looking for a direction of "InputOutput" so the following change fixed the problem.

Result.Direction = ParameterDirection.InputOutput;

CSS3 transform not working

This is merely an educated guess without seeing the rest of your HTML/CSS:

Have you applied display: block or display: inline-block to li a? If not, try it.

Otherwise, try applying the CSS3 transform rules to li instead.

Checkout subdirectories in Git?

You can revert uncommitted changes only to particular file or directory:

git checkout [some_dir|file.txt]

Nullable type as a generic parameter possible?

I just encountered the same problem myself.

... = reader["myYear"] as int?; works and is clean.

It works with any type without an issue. If the result is DBNull, it returns null as the conversion fails.

How can I control the speed that bootstrap carousel slides in items?

Add Data interval

data-interval="20000"

Getting around the Max String size in a vba function?

Excel only shows 255 characters but in fact if more than 255 characters are saved, to see the complete string, consult it in the immediate window

Press Crl + G and type ?RunWhat in the immediate window and press Enter

Jenkins / Hudson environment variables

Add

/usr/bin/bash

Jenkins -> Manage Jenkins -> configure System -> Shell->Shell executable

Jenkins use the sh so that even /etc/profile doesn't work for me When I add this, I have all the env.

apache not accepting incoming connections from outside of localhost

Try disabling iptables: service iptables stop

If this works, enable TCP port 80 to your firewall rules: run system-config-selinux from root, and enable TCP port 80 (HTTP) on your firewall.

C++ vector of char array

You cannot store arrays in vectors (or in any other standard library container). The things that standard library containers store must be copyable and assignable, and arrays are neither of these.

If you really need to put an array in a vector (and you probably don't - using a vector of vectors or a vector of strings is more likely what you need), then you can wrap the array in a struct:

struct S {
  char a[10];
};

and then create a vector of structs:

vector <S> v;
S s;
s.a[0] = 'x';
v.push_back( s );

Shortcut for creating single item list in C#

Try var

var s = new List<string> { "a", "bk", "ca", "d" };

Loop through a comma-separated shell variable

Try this one.

#/bin/bash   
testpid="abc,def,ghij" 
count=`echo $testpid | grep -o ',' | wc -l` # this is not a good way
count=`expr $count + 1` 
while [ $count -gt 0 ]  ; do
     echo $testpid | cut -d ',' -f $i
     count=`expr $count - 1 `
done

Encoding an image file with base64

import base64
from PIL import Image
from io import BytesIO

with open("image.jpg", "rb") as image_file:
    data = base64.b64encode(image_file.read())

im = Image.open(BytesIO(base64.b64decode(data)))
im.save('image1.png', 'PNG')

How to add color to Github's README.md file

You can use the diff language tag to generate some colored text:

```diff
- text in red
+ text in green
! text in orange
# text in gray
@@ text in purple (and bold)@@
```

However, it adds it as a new line starting with either - + ! # or starts and ends with @@

enter image description here

This issue was raised in github markup #369, but they haven't made any change in decision since then (2014).

PHP: merge two arrays while keeping keys instead of reindexing?

Try array_replace_recursive or array_replace functions

$a = array('userID' => 1, 'username'=> 2);
array (
  userID => 1,
  username => 2
)
$b = array('userID' => 1, 'companyID' => 3);
array (
  'userID' => 1,
  'companyID' => 3
)
$c = array_replace_recursive($a,$b);
array (
  userID => 1,
  username => 2,
  companyID => 3
)

http://php.net/manual/en/function.array-replace-recursive.php

how to copy only the columns in a DataTable to another DataTable?

DataTable.Clone() should do the trick.

DataTable newTable = originalTable.Clone();

How can I drop a table if there is a foreign key constraint in SQL Server?

1-firstly, drop the foreign key constraint after that drop the tables.

2-you can drop all foreign key via executing the following query:

DECLARE @SQL varchar(4000)=''
SELECT @SQL = 
@SQL + 'ALTER TABLE ' + s.name+'.'+t.name + ' DROP CONSTRAINT [' + RTRIM(f.name) +'];' + CHAR(13)
FROM sys.Tables t
INNER JOIN sys.foreign_keys f ON f.parent_object_id = t.object_id
INNER JOIN sys.schemas     s ON s.schema_id = f.schema_id

--EXEC (@SQL)

PRINT @SQL

if you execute the printed results @SQL, the foreign keys will be dropped.

Using str_replace so that it only acts on the first match?

Edit: both answers have been updated and are now correct. I'll leave the answer since the function timings are still useful.

The answers by 'zombat' and 'too much php' are unfortunately not correct. This is a revision to the answer zombat posted (as I don't have enough reputation to post a comment):

$pos = strpos($haystack,$needle);
if ($pos !== false) {
    $newstring = substr_replace($haystack,$replace,$pos,strlen($needle));
}

Note the strlen($needle), instead of strlen($replace). Zombat's example will only work correctly if needle and replace are the same length.

Here's the same functionality in a function with the same signature as PHP's own str_replace:

function str_replace_first($search, $replace, $subject) {
    $pos = strpos($subject, $search);
    if ($pos !== false) {
        return substr_replace($subject, $replace, $pos, strlen($search));
    }
    return $subject;
}

This is the revised answer of 'too much php':

implode($replace, explode($search, $subject, 2));

Note the 2 at the end instead of 1. Or in function format:

function str_replace_first($search, $replace, $subject) {
    return implode($replace, explode($search, $subject, 2));
}

I timed the two functions and the first one is twice as fast when no match is found. They are the same speed when a match is found.

How to bind multiple values to a single WPF TextBlock?

I know this is a way late, but I thought I'd add yet another way of doing this.

You can take advantage of the fact that the Text property can be set using "Runs", so you can set up multiple bindings using a Run for each one. This is useful if you don't have access to MultiBinding (which I didn't find when developing for Windows Phone)

<TextBlock>
  <Run Text="Name = "/>
  <Run Text="{Binding Name}"/>
  <Run Text=", Id ="/>
  <Run Text="{Binding Id}"/>
</TextBlock>

Python math module

add:

import math

at beginning. and then use:

math.sqrt(num)  # or any other function you deem neccessary

Run bash script as daemon

To run it as a full daemon from a shell, you'll need to use setsid and redirect its output. You can redirect the output to a logfile, or to /dev/null to discard it. Assuming your script is called myscript.sh, use the following command:

setsid myscript.sh >/dev/null 2>&1 < /dev/null &

This will completely detach the process from your current shell (stdin, stdout and stderr). If you want to keep the output in a logfile, replace the first /dev/null with your /path/to/logfile.

You have to redirect the output, otherwise it will not run as a true daemon (it will depend on your shell to read and write output).

Print PHP Call Stack

var_dump(debug_backtrace());

Does that do what you want?

How can I check if a string contains ANY letters from the alphabet?

Regex should be a fast approach:

re.search('[a-zA-Z]', the_string)

How to remove single character from a String

public String missingChar(String str, int n) {
  String front = str.substring(0, n);

// Start this substring at n+1 to omit the char.
// Can also be shortened to just str.substring(n+1)
// which goes through the end of the string.

String back = str.substring(n+1, str.length());
  return front + back;
}

delete image from folder PHP

First Check that is image exists? if yes then simply Call unlink(your file path) function to remove you file otherwise show message to the user.

              if (file_exists($filePath)) 
               {
                 unlink($filePath);
                  echo "File Successfully Delete."; 
              }
              else
              {
               echo "File does not exists"; 
              }

How to create a new file in unix?

Try > workdirectory/filename.txt

This would:

truncate the file if it exists
create if it doesn't exist

You can consider it equivalent to:

rm -f workdirectory/filename.txt; touch workdirectory/filename.txt

How can I see the raw SQL queries Django is running?

See the docs FAQ: "How can I see the raw SQL queries Django is running?"

django.db.connection.queries contains a list of the SQL queries:

from django.db import connection
print(connection.queries)

Querysets also have a query attribute containing the query to be executed:

print(MyModel.objects.filter(name="my name").query)

Note that the output of the query is not valid SQL, because:

"Django never actually interpolates the parameters: it sends the query and the parameters separately to the database adapter, which performs the appropriate operations."

From Django bug report #17741.

Because of that, you should not send query output directly to a database.

Fit website background image to screen size

.. I found the above solutions didn't work for me (on current versions of firefox and safari at least).

In my case I'm actually trying to do it with an img tag, not background-image, though it should also work for background-image if you use z-height:

<img  src='$url' style='position:absolute; top,left:0px; width,max-height:100%; border:0;' >

This scales the image to be 'fullscreen' (probably breaking the aspect ratio) which was what I wanted to do but had a hard-time finding.

It may also work for background-image though I gave up on trying that kind of solution after cover/contain didn't work for me.

I found contain behaviour didn't seem to match the documentation I could find anywhere - I understood the documentation to say contain should make the largest dimension get contained within the screen (maintained aspect). I found contain always made my image tiny (original image was large).

Contain was with some hacks closer to what I wanted than cover, which seems to be that the aspect is maintained but image is scaled to make the smallest-dimension match the screen - i.e. always make the image as big as it can until one of the dimensions would go offscreen...

I tried a bunch of different things, starting over included, but found height was essentially always ignored and would overflow. (I've been trying to scale a non-widescreen image to be fullscreen on both, broken-aspect is ok for me). Basically, the above is what worked for me, hope it helps someone.

Class method decorator with self arguments?

from re import search
from functools import wraps

def is_match(_lambda, pattern):
    def wrapper(f):
        @wraps(f)
        def wrapped(self, *f_args, **f_kwargs):
            if callable(_lambda) and search(pattern, (_lambda(self) or '')): 
                f(self, *f_args, **f_kwargs)
        return wrapped
    return wrapper

class MyTest(object):

    def __init__(self):
        self.name = 'foo'
        self.surname = 'bar'

    @is_match(lambda x: x.name, 'foo')
    @is_match(lambda x: x.surname, 'foo')
    def my_rule(self):
        print 'my_rule : ok'

    @is_match(lambda x: x.name, 'foo')
    @is_match(lambda x: x.surname, 'bar')
    def my_rule2(self):
        print 'my_rule2 : ok'



test = MyTest()
test.my_rule()
test.my_rule2()

ouput: my_rule2 : ok

implement addClass and removeClass functionality in angular2

If you want to due this in component.ts

HTML:

<button class="class1 class2" (click)="clicked($event)">Click me</button>

Component:

clicked(event) {
  event.target.classList.add('class3'); // To ADD
  event.target.classList.remove('class1'); // To Remove
  event.target.classList.contains('class2'); // To check
  event.target.classList.toggle('class4'); // To toggle
}

For more options, examples and browser compatibility visit this link.

What is the difference between List and ArrayList?

There's no difference between list implementations in both of your examples. There's however a difference in a way you can further use variable myList in your code.

When you define your list as:

List myList = new ArrayList();

you can only call methods and reference members that are defined in the List interface. If you define it as:

ArrayList myList = new ArrayList();

you'll be able to invoke ArrayList-specific methods and use ArrayList-specific members in addition to those whose definitions are inherited from List.

Nevertheless, when you call a method of a List interface in the first example, which was implemented in ArrayList, the method from ArrayList will be called (because the List interface doesn't implement any methods).

That's called polymorphism. You can read up on it.

How to add an item to a drop down list in ASP.NET?

Try this, it will insert the list item at index 0;

DropDownList1.Items.Insert(0, new ListItem("Add New", ""));

Single TextView with multiple colored text

Try this:

mBox = new TextView(context);
mBox.setText(Html.fromHtml("<b>" + title + "</b>" +  "<br />" + 
      "<small>" + description + "</small>" + "<br />" + 
      "<small>" + DateAdded + "</small>"));

How do I install ASP.NET MVC 5 in Visual Studio 2012?

This feature is now available for Visual Studio 2012 at Web Platform Installer. Just search for ASP.NET and Web Tools 2012.2.

How to install ASP.NET and Web Tools 2012.2

What does the exclamation mark do before the function?

It returns whether the statement can evaluate to false. eg:

!false      // true
!true       // false
!isValid()  // is not valid

You can use it twice to coerce a value to boolean:

!!1    // true
!!0    // false

So, to more directly answer your question:

var myVar = !function(){ return false; }();  // myVar contains true

Edit: It has the side effect of changing the function declaration to a function expression. E.g. the following code is not valid because it is interpreted as a function declaration that is missing the required identifier (or function name):

function () { return false; }();  // syntax error

Eclipse fonts and background color

Under Windows ? Preferences ? General ? Apperance you can find a dark theme.

`IF` statement with 3 possible answers each based on 3 different ranges

Your formula should be of the form =IF(X2 >= 85,0.559,IF(X2 >= 80,0.327,IF(X2 >=75,0.255,0))). This simulates the ELSE-IF operand Excel lacks. Your formulas were using two conditions in each, but the second parameter of the IF formula is the value to use if the condition evaluates to true. You can't chain conditions in that manner.

Disable Proximity Sensor during call

edit build.prop in folder /system if below line is exist change the value and if not exist add this line and save.(device must be rooted)

ro.lge.proximity.delay=25
mot.proximity.delay=25

How to rename HTML "browse" button of an input type=file?

The button isn't called the "browse button" — that's just the name your browser gives for it. Browsers are free to implement the file upload control however they like. In Safari, for example, it's called "Choose File" and it's on the opposite side of whatever you're probably using.

You can implement a custom look for the upload control using the technique outlined on QuirksMode, but that goes beyond just changing the button's text.

Using curl POST with variables defined in bash script functions

the info from Sir Athos worked perfectly !!

Here's how I had to use it in my curl script for couchDB. It really helped out a lot. Thanks!

bin/curl -X PUT "db_domain_name_:5984/_config/vhosts/$1.couchdb" -d '"/'"$1"'/"' --user "admin:*****"

Java synchronized method lock on object, or method?

Synchronized on the method declaration is syntactical sugar for this:

 public void addA() {
     synchronized (this) {
          a++;
     }
  }

On a static method it is syntactical sugar for this:

 ClassA {
     public static void addA() {
          synchronized(ClassA.class) {
              a++;
          }
 }

I think if the Java designers knew then what is understood now about synchronization, they would not have added the syntactical sugar, as it more often than not leads to bad implementations of concurrency.

Find distance between two points on map using Google Map API V2

In android google maps application there is a very easy way to find distance between 2 locations, to do so follow the following easy steps:

when you first open the app go to " your timeline " from the drop menue on the top left.
once the new windwo opens, chose from the settings on your top right menue and choose "add place".
add your places and name them lilke point 1 , point 2 , or any easy name to remember.
once your places are added and flagged go back to the main Window in your google app.
click on the blue circle with the arrow in your bottom right.
a new windwo will open and you can see on the top there are two text fields in which you can add your "from location" and "distance location".
click on any text field and type in your saved location in point 3.
click on the other text field and add your next saved location.
By doing so, google maps will calculate the distance between the two locations and show you the blue path on map ..

Good luck

Gradle sync failed: failed to find Build Tools revision 24.0.0 rc1

Another thing is that all libraries from google (e.g. support lib, CardView and etc.) should have identical versions

Search for value in DataGridView in a column

Why don't you build a DataTable first then assign it to the DataGridView as DataSource:

DataTable table4DataSource=new DataTable();

table4DataSource.Columns.Add("col00");
table4DataSource.Columns.Add("col01");
table4DataSource.Columns.Add("col02");

...

(add your rows, manually, in a circle or via a DataReader from a database table) (assign the datasource)

dtGrdViewGrid.DataSource = table4DataSource;

and then use:

(dtGrdViewGrid.DataSource as DataTable).DefaultView.RowFilter = "col00 = '" + textBoxSearch.Text+ "'";
dtGrdViewGrid.Refresh();

You can even put this piece of code within your textbox_textchange event and your filtered values will be showing as you write.

Automatic prune with Git fetch or pull

`git config --global fetch.prune true`

To always --prune for git fetch and git pull in all your Git repositories:

git config --global fetch.prune true

This above command appends in your global Git configuration (typically ~/.gitconfig) the following lines. Use git config -e --global to view your global configuration.

[fetch]
    prune = true

`git config remote.origin.prune true`

To always --prune but from one single repository:

git config remote.origin.prune true
                 #^^^^^^
                 #replace with your repo name

This above command adds in your local Git configuration (typically .git/config) the below last line. Use git config -e to view your local configuration.

[remote "origin"]
    url = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
    fetch = +refs/heads/*:refs/remotes/origin/*
    prune = true

You can also use --global within the second command or use instead --local within the first command.

`git config --global gui.pruneDuringFetch true`

If you use git gui you may also be interested by:

git config --global gui.pruneDuringFetch true

that appends:

[gui]
    pruneDuringFetch = true

References

The corresponding documentations from git help config:

--global

For writing options: write to global ~/.gitconfig file rather than the repository .git/config, write to $XDG_CONFIG_HOME/git/config file if this file exists and the ~/.gitconfig file doesn’t.

--local

For writing options: write to the repository .git/config file. This is the default behavior.

fetch.prune

If true, fetch will automatically behave as if the --prune option was given on the command line. See also remote.<name>.prune.

gui.pruneDuringFetch

"true" if git-gui should prune remote-tracking branches when performing a fetch. The default value is "false".

remote.<name>.prune

When set to true, fetching from this remote by default will also remove any remote-tracking references that no longer exist on the remote (as if the --prune option was given on the command line). Overrides fetch.prune settings, if any.

The entity name must immediately follow the '&' in the entity reference

You need to add a CDATA tag inside of the script tag, unless you want to manually go through and escape all XHTML characters (e.g. & would need to become &). For example:

<script>
//<![CDATA[
var el = document.getElementById("pacman");

if (Modernizr.canvas && Modernizr.localstorage && 
    Modernizr.audio && (Modernizr.audio.ogg || Modernizr.audio.mp3)) {
  window.setTimeout(function () { PACMAN.init(el, "./"); }, 0);
} else { 
  el.innerHTML = "Sorry, needs a decent browser<br /><small>" + 
    "(firefox 3.6+, Chrome 4+, Opera 10+ and Safari 4+)</small>";
}
//]]>
</script>

Creating custom function in React component

With React Functional way

import React, { useEffect } from "react";
import ReactDOM from "react-dom";
import Button from "@material-ui/core/Button";

const App = () => {
  const saySomething = (something) => {
    console.log(something);
  };
  useEffect(() => {
    saySomething("from useEffect");
  });
  const handleClick = (e) => {
    saySomething("element clicked");
  };
  return (
    <Button variant="contained" color="primary" onClick={handleClick}>
      Hello World
    </Button>
  );
};

ReactDOM.render(<App />, document.querySelector("#app"));

https://codesandbox.io/s/currying-meadow-gm9g0

mysql error 2005 - Unknown MySQL server host 'localhost'(11001)

I have passed through that error today and did everything described above but didn't work for me. So I decided to view the core problem and logged onto the MySQL root folder in Windows 7 and did this solution:

Go to folder:
```
C:\AppServ\MySQL
```

Right click and Run as Administrator these files:

mysql_servicefix.bat

mysql_serviceinstall.bat

mysql_servicestart.bat

Then close the entire explorer window and reopen it or clear cache then login to phpMyAdmin again.

ROW_NUMBER() in MySQL

Solutions with cross join and comma won't work if your query has GROUP BY statement. For such cases you can use subselect:

SELECT (@row_number := @row_number + 1) AS rowNumber, res.*
FROM
(
  SELECT SUM(r.amount) 
  FROM Results r 
  WHERE username = 1 
  GROUP BY r.amount
) res
CROSS JOIN (SELECT @row_number := 0) AS dummy

How do I get the current absolute URL in Ruby on Rails?

For rails 3 :

request.fullpath

Cast IList to List

The other answers all recommend to use AddRange with an IList.

A more elegant solution that avoids the casting is to implement an extension to IList to do the job.

In VB.NET:

<Extension()>
Public Sub AddRange(Of T)(ByRef Exttype As IList(Of T), ElementsToAdd As IEnumerable(Of T))
   For Each ele In ElementsToAdd
      Exttype.Add(ele)
   Next
End Sub

And in C#:

public void AddRange<T>(this ref IList<T> Exttype, IEnumerable<T> ElementsToAdd)
{
    foreach (var ele in ElementsToAdd)
    {
        Exttype.Add(ele);
    }
}

Can I force pip to reinstall the current version?

pip install --upgrade --force-reinstall <package>

When upgrading, reinstall all packages even if they are already up-to-date.

pip install -I <package>
pip install --ignore-installed <package>

Ignore the installed packages (reinstalling instead).

How to change a css class style through Javascript?

Since classList is supported in all major browsers and jQuery drops support for IE<9 (in 2.x branch as Stormblack points in the comment), considering this HTML

<div id="mydiv" class="oldclass">text</div>

you can comfortably use this syntax:

document.getElementById('mydiv').classList.add("newClass");

This will also result in:

<div id="mydiv" class="oldclass newclass">text</div>

plus you can also use remove, toggle, contains methods.

Compression/Decompression string with C#

The code to compress/decompress a string

public static void CopyTo(Stream src, Stream dest) {
    byte[] bytes = new byte[4096];

    int cnt;

    while ((cnt = src.Read(bytes, 0, bytes.Length)) != 0) {
        dest.Write(bytes, 0, cnt);
    }
}

public static byte[] Zip(string str) {
    var bytes = Encoding.UTF8.GetBytes(str);

    using (var msi = new MemoryStream(bytes))
    using (var mso = new MemoryStream()) {
        using (var gs = new GZipStream(mso, CompressionMode.Compress)) {
            //msi.CopyTo(gs);
            CopyTo(msi, gs);
        }

        return mso.ToArray();
    }
}

public static string Unzip(byte[] bytes) {
    using (var msi = new MemoryStream(bytes))
    using (var mso = new MemoryStream()) {
        using (var gs = new GZipStream(msi, CompressionMode.Decompress)) {
            //gs.CopyTo(mso);
            CopyTo(gs, mso);
        }

        return Encoding.UTF8.GetString(mso.ToArray());
    }
}

static void Main(string[] args) {
    byte[] r1 = Zip("StringStringStringStringStringStringStringStringStringStringStringStringStringString");
    string r2 = Unzip(r1);
}

Remember that Zip returns a byte[], while Unzip returns a string. If you want a string from Zip you can Base64 encode it (for example by using Convert.ToBase64String(r1)) (the result of Zip is VERY binary! It isn't something you can print to the screen or write directly in an XML)

The version suggested is for .NET 2.0, for .NET 4.0 use the MemoryStream.CopyTo.

IMPORTANT: The compressed contents cannot be written to the output stream until the GZipStream knows that it has all of the input (i.e., to effectively compress it needs all of the data). You need to make sure that you Dispose() of the GZipStream before inspecting the output stream (e.g., mso.ToArray()). This is done with the using() { } block above. Note that the GZipStream is the innermost block and the contents are accessed outside of it. The same goes for decompressing: Dispose() of the GZipStream before attempting to access the data.

Global keyboard capture in C# application

Here's my code that works:

using System;
using System.ComponentModel;
using System.Diagnostics;
using System.Runtime.InteropServices;

namespace SnagFree.TrayApp.Core
{
    class GlobalKeyboardHookEventArgs : HandledEventArgs
    {
        public GlobalKeyboardHook.KeyboardState KeyboardState { get; private set; }
        public GlobalKeyboardHook.LowLevelKeyboardInputEvent KeyboardData { get; private set; }

        public GlobalKeyboardHookEventArgs(
            GlobalKeyboardHook.LowLevelKeyboardInputEvent keyboardData,
            GlobalKeyboardHook.KeyboardState keyboardState)
        {
            KeyboardData = keyboardData;
            KeyboardState = keyboardState;
        }
    }

    //Based on https://gist.github.com/Stasonix
    class GlobalKeyboardHook : IDisposable
    {
        public event EventHandler<GlobalKeyboardHookEventArgs> KeyboardPressed;

        public GlobalKeyboardHook()
        {
            _windowsHookHandle = IntPtr.Zero;
            _user32LibraryHandle = IntPtr.Zero;
            _hookProc = LowLevelKeyboardProc; // we must keep alive _hookProc, because GC is not aware about SetWindowsHookEx behaviour.

            _user32LibraryHandle = LoadLibrary("User32");
            if (_user32LibraryHandle == IntPtr.Zero)
            {
                int errorCode = Marshal.GetLastWin32Error();
                throw new Win32Exception(errorCode, $"Failed to load library 'User32.dll'. Error {errorCode}: {new Win32Exception(Marshal.GetLastWin32Error()).Message}.");
            }



            _windowsHookHandle = SetWindowsHookEx(WH_KEYBOARD_LL, _hookProc, _user32LibraryHandle, 0);
            if (_windowsHookHandle == IntPtr.Zero)
            {
                int errorCode = Marshal.GetLastWin32Error();
                throw new Win32Exception(errorCode, $"Failed to adjust keyboard hooks for '{Process.GetCurrentProcess().ProcessName}'. Error {errorCode}: {new Win32Exception(Marshal.GetLastWin32Error()).Message}.");
            }
        }

        protected virtual void Dispose(bool disposing)
        {
            if (disposing)
            {
                // because we can unhook only in the same thread, not in garbage collector thread
                if (_windowsHookHandle != IntPtr.Zero)
                {
                    if (!UnhookWindowsHookEx(_windowsHookHandle))
                    {
                        int errorCode = Marshal.GetLastWin32Error();
                        throw new Win32Exception(errorCode, $"Failed to remove keyboard hooks for '{Process.GetCurrentProcess().ProcessName}'. Error {errorCode}: {new Win32Exception(Marshal.GetLastWin32Error()).Message}.");
                    }
                    _windowsHookHandle = IntPtr.Zero;

                    // ReSharper disable once DelegateSubtraction
                    _hookProc -= LowLevelKeyboardProc;
                }
            }

            if (_user32LibraryHandle != IntPtr.Zero)
            {
                if (!FreeLibrary(_user32LibraryHandle)) // reduces reference to library by 1.
                {
                    int errorCode = Marshal.GetLastWin32Error();
                    throw new Win32Exception(errorCode, $"Failed to unload library 'User32.dll'. Error {errorCode}: {new Win32Exception(Marshal.GetLastWin32Error()).Message}.");
                }
                _user32LibraryHandle = IntPtr.Zero;
            }
        }

        ~GlobalKeyboardHook()
        {
            Dispose(false);
        }

        public void Dispose()
        {
            Dispose(true);
            GC.SuppressFinalize(this);
        }

        private IntPtr _windowsHookHandle;
        private IntPtr _user32LibraryHandle;
        private HookProc _hookProc;

        delegate IntPtr HookProc(int nCode, IntPtr wParam, IntPtr lParam);

        [DllImport("kernel32.dll")]
        private static extern IntPtr LoadLibrary(string lpFileName);

        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        private static extern bool FreeLibrary(IntPtr hModule);

        /// <summary>
        /// The SetWindowsHookEx function installs an application-defined hook procedure into a hook chain.
        /// You would install a hook procedure to monitor the system for certain types of events. These events are
        /// associated either with a specific thread or with all threads in the same desktop as the calling thread.
        /// </summary>
        /// <param name="idHook">hook type</param>
        /// <param name="lpfn">hook procedure</param>
        /// <param name="hMod">handle to application instance</param>
        /// <param name="dwThreadId">thread identifier</param>
        /// <returns>If the function succeeds, the return value is the handle to the hook procedure.</returns>
        [DllImport("USER32", SetLastError = true)]
        static extern IntPtr SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hMod, int dwThreadId);

        /// <summary>
        /// The UnhookWindowsHookEx function removes a hook procedure installed in a hook chain by the SetWindowsHookEx function.
        /// </summary>
        /// <param name="hhk">handle to hook procedure</param>
        /// <returns>If the function succeeds, the return value is true.</returns>
        [DllImport("USER32", SetLastError = true)]
        public static extern bool UnhookWindowsHookEx(IntPtr hHook);

        /// <summary>
        /// The CallNextHookEx function passes the hook information to the next hook procedure in the current hook chain.
        /// A hook procedure can call this function either before or after processing the hook information.
        /// </summary>
        /// <param name="hHook">handle to current hook</param>
        /// <param name="code">hook code passed to hook procedure</param>
        /// <param name="wParam">value passed to hook procedure</param>
        /// <param name="lParam">value passed to hook procedure</param>
        /// <returns>If the function succeeds, the return value is true.</returns>
        [DllImport("USER32", SetLastError = true)]
        static extern IntPtr CallNextHookEx(IntPtr hHook, int code, IntPtr wParam, IntPtr lParam);

        [StructLayout(LayoutKind.Sequential)]
        public struct LowLevelKeyboardInputEvent
        {
            /// <summary>
            /// A virtual-key code. The code must be a value in the range 1 to 254.
            /// </summary>
            public int VirtualCode;

            /// <summary>
            /// A hardware scan code for the key. 
            /// </summary>
            public int HardwareScanCode;

            /// <summary>
            /// The extended-key flag, event-injected Flags, context code, and transition-state flag. This member is specified as follows. An application can use the following values to test the keystroke Flags. Testing LLKHF_INJECTED (bit 4) will tell you whether the event was injected. If it was, then testing LLKHF_LOWER_IL_INJECTED (bit 1) will tell you whether or not the event was injected from a process running at lower integrity level.
            /// </summary>
            public int Flags;

            /// <summary>
            /// The time stamp stamp for this message, equivalent to what GetMessageTime would return for this message.
            /// </summary>
            public int TimeStamp;

            /// <summary>
            /// Additional information associated with the message. 
            /// </summary>
            public IntPtr AdditionalInformation;
        }

        public const int WH_KEYBOARD_LL = 13;
        //const int HC_ACTION = 0;

        public enum KeyboardState
        {
            KeyDown = 0x0100,
            KeyUp = 0x0101,
            SysKeyDown = 0x0104,
            SysKeyUp = 0x0105
        }

        public const int VkSnapshot = 0x2c;
        //const int VkLwin = 0x5b;
        //const int VkRwin = 0x5c;
        //const int VkTab = 0x09;
        //const int VkEscape = 0x18;
        //const int VkControl = 0x11;
        const int KfAltdown = 0x2000;
        public const int LlkhfAltdown = (KfAltdown >> 8);

        public IntPtr LowLevelKeyboardProc(int nCode, IntPtr wParam, IntPtr lParam)
        {
            bool fEatKeyStroke = false;

            var wparamTyped = wParam.ToInt32();
            if (Enum.IsDefined(typeof(KeyboardState), wparamTyped))
            {
                object o = Marshal.PtrToStructure(lParam, typeof(LowLevelKeyboardInputEvent));
                LowLevelKeyboardInputEvent p = (LowLevelKeyboardInputEvent)o;

                var eventArguments = new GlobalKeyboardHookEventArgs(p, (KeyboardState)wparamTyped);

                EventHandler<GlobalKeyboardHookEventArgs> handler = KeyboardPressed;
                handler?.Invoke(this, eventArguments);

                fEatKeyStroke = eventArguments.Handled;
            }

            return fEatKeyStroke ? (IntPtr)1 : CallNextHookEx(IntPtr.Zero, nCode, wParam, lParam);
        }
    }
}

Usage:

using System;
using System.Windows.Forms;

namespace SnagFree.TrayApp.Core
{
    internal class Controller : IDisposable
    {
        private GlobalKeyboardHook _globalKeyboardHook;

        public void SetupKeyboardHooks()
        {
            _globalKeyboardHook = new GlobalKeyboardHook();
            _globalKeyboardHook.KeyboardPressed += OnKeyPressed;
        }

        private void OnKeyPressed(object sender, GlobalKeyboardHookEventArgs e)
        {
            //Debug.WriteLine(e.KeyboardData.VirtualCode);

            if (e.KeyboardData.VirtualCode != GlobalKeyboardHook.VkSnapshot)
                return;

            // seems, not needed in the life.
            //if (e.KeyboardState == GlobalKeyboardHook.KeyboardState.SysKeyDown &&
            //    e.KeyboardData.Flags == GlobalKeyboardHook.LlkhfAltdown)
            //{
            //    MessageBox.Show("Alt + Print Screen");
            //    e.Handled = true;
            //}
            //else

            if (e.KeyboardState == GlobalKeyboardHook.KeyboardState.KeyDown)
            {
                MessageBox.Show("Print Screen");
                e.Handled = true;
            }
        }

        public void Dispose()
        {
            _globalKeyboardHook?.Dispose();
        }
    }
}

How do I fix a merge conflict due to removal of a file in a branch?

I normally just run git mergetool and it will prompt me if I want to keep the modified file or keep it deleted. This is the quickest way IMHO since it's one command instead of several per file.

If you have a bunch of deleted files in a specific subdirectory and you want all of them to be resolved by deleting the files, you can do this:

yes d | git mergetool -- the/subdirectory

The d is provided to choose deleting each file. You can also use m to keep the modified file. Taken from the prompt you see when you run mergetool:

Use (m)odified or (d)eleted file, or (a)bort?

restrict edittext to single line

for me i do it like this , go to your textView in xml file and add this two lines

` android:maxLines="1"

android:inputType="text"`

What difference does .AsNoTracking() make?

No Tracking LINQ to Entities queries

Usage of AsNoTracking() is recommended when your query is meant for read operations. In these scenarios, you get back your entities but they are not tracked by your context.This ensures minimal memory usage and optimal performance

Pros

Improved performance over regular LINQ queries.

Fully materialized objects.

Simplest to write with syntax built into the programming language.

Cons

Not suitable for CUD operations.

Certain technical restrictions, such as: Patterns using DefaultIfEmpty for OUTER JOIN queries result in more complex queries than simple OUTER JOIN statements in Entity SQL.

You still can’t use LIKE with general pattern matching.

More info available here:

Performance considerations for Entity Framework

Entity Framework and NoTracking

How to remove decimal part from a number in C#

If you just need the integer part of the double then use explicit cast to int.

int number = (int) a;

You may use Convert.ToInt32 Method (Double), but this will round the number to the nearest integer.

value, rounded to the nearest 32-bit signed integer. If value is halfway between two whole numbers, the even number is returned; that is, 4.5 is converted to 4, and 5.5 is converted to 6.

Uncaught SyntaxError: Block-scoped declarations (let, const, function, class) not yet supported outside strict mode

This means that you must declare strict mode by writing "use strict" at the beginning of the file or the function to use block-scope declarations.

EX:

function test(){
    "use strict";
    let a = 1;
}

Setting custom UITableViewCells height

I saw a lot of solutions but all was wrong or uncomplet. You can solve all problems with 5 lines in viewDidLoad and autolayout. This for objetive C:

_tableView.delegate = self;
_tableView.dataSource = self;
self.tableView.estimatedRowHeight = 80;//the estimatedRowHeight but if is more this autoincremented with autolayout
self.tableView.rowHeight = UITableViewAutomaticDimension;
[self.tableView setNeedsLayout];
[self.tableView layoutIfNeeded];
self.tableView.contentInset = UIEdgeInsetsMake(20, 0, 0, 0) ;

For swift 2.0:

 self.tableView.estimatedRowHeight = 80
 self.tableView.rowHeight = UITableViewAutomaticDimension      
 self.tableView.setNeedsLayout()
 self.tableView.layoutIfNeeded()
 self.tableView.contentInset = UIEdgeInsetsMake(20, 0, 0, 0)

Now create your cell with xib or into tableview in your Storyboard With this you no need implement nothing more or override. (Don forget number os lines 0) and the bottom label (constrain) downgrade "Content Hugging Priority -- Vertical to 250"

You can donwload the code in the next url: https://github.com/jposes22/exampleTableCellCustomHeight

How do I handle the window close event in Tkinter?

i say a lot simpler way would be using the break command, like

import tkinter as tk
win=tk.Tk
def exit():
    break
btn= tk.Button(win, text="press to exit", command=exit)
win.mainloop()

OR use sys.exit()

import tkinter as tk
import sys
win=tk.Tk
def exit():
    sys.exit
btn= tk.Button(win, text="press to exit", command=exit)
win.mainloop()

ViewDidAppear is not called when opening app from background

Swift 3.0 ++ version

In your viewDidLoad, register at notification center to listen to this opened from background action

NotificationCenter.default.addObserver(self, selector:#selector(doSomething), name: NSNotification.Name.UIApplicationWillEnterForeground, object: nil)

Then add this function and perform needed action

func doSomething(){
    //...
}

Finally add this function to clean up the notification observer when your view controller is destroyed.

deinit {
    NotificationCenter.default.removeObserver(self)
}

php: loop through json array

Decode the JSON string using json_decode() and then loop through it using a regular loop:

$arr = json_decode('[{"var1":"9","var2":"16","var3":"16"},{"var1":"8","var2":"15","var3":"15"}]');

foreach($arr as $item) { //foreach element in $arr
    $uses = $item['var1']; //etc
}

Serializing to JSON in jQuery

I haven't used it but you might want to try the jQuery plugin written by Mark Gibson

It adds the two functions: $.toJSON(value), $.parseJSON(json_str, [safe]).

Force encode from US-ASCII to UTF-8 (iconv)

Here's a script that will find all files matching a pattern you pass it, and then converting them from their current file encoding to UTF-8. If the encoding is US ASCII, then it will still show as US ASCII, since that is a subset of UTF-8.

#!/usr/bin/env bash
find . -name "${1}" |
    while read line;
    do
        echo "***************************"
        echo "Converting ${line}"

        encoding=$(file -b --mime-encoding ${line})
        echo "Found Encoding: ${encoding}"

        iconv -f "${encoding}" -t "utf-8" ${line} -o ${line}.tmp
        mv ${line}.tmp ${line}
    done

View markdown files offline

I frequently want portable applications. For this, I found

http://cloose.github.io/CuteMarkEd/ (I have just tried it briefly, and it seems to work fine).

http://markdownpad.com/faq.html#portable

Echo a blank (empty) line to the console from a Windows batch file

There is often the tip to use 'echo.'

But that is slow, and it could fail with an error message, as cmd.exe will search first for a file named 'echo' (without extension) and only when the file doesn't exists it outputs an empty line.

You could use echo(. This is approximately 20 times faster, and it works always. The only drawback could be that it looks odd.

More about the different ECHO:/\ variants is at DOS tips: ECHO. FAILS to give text or blank line.

Where is the Android SDK folder located?

MessageBox with YesNoCancel - No & Cancel triggers same event

This is how you can do it without a Dim, using MessageBox.Show instead of MsgBox. This is in my opinion the cleanest way of writing it!

Select Case MessageBox.Show("Message", "Title", MessageBoxButtons.YesNo)
    Case vbYes
        ' Other Code goes here
    Case vbNo
        ' Other Code goes here
End Select

You can shorten it down even further by using If:

If MessageBox.Show("Message", "Title", MessageBoxButtons.YesNo) = vbYes Then
    ' Other Code goes here
End If

How to search and replace text in a file?

My variant, one word at a time on the entire file.

I read it into memory.

def replace_word(infile,old_word,new_word):
    if not os.path.isfile(infile):
        print ("Error on replace_word, not a regular file: "+infile)
        sys.exit(1)

    f1=open(infile,'r').read()
    f2=open(infile,'w')
    m=f1.replace(old_word,new_word)
    f2.write(m)

How do I find out what keystore my JVM is using?

We encountered this issue on a Tomcat running from a jre directory that was (almost fully) removed after an automatic jre update, so that the running jre could no longer find jre.../lib/security/cacerts because it no longer existed.

Restarting Tomcat (after changing the configuration to run from the different jre location) fixed the problem.

Open mvc view in new window from controller

You can use as follows

public ActionResult NewWindow()
{
    return Content("<script>window.open('{url}','_blank')</script>");
}

What are the uses of the exec command in shell scripts?

Just to augment the accepted answer with a brief newbie-friendly short answer, you probably don't need exec.

If you're still here, the following discussion should hopefully reveal why. When you run, say,

sh -c 'command'

you run a sh instance, then start command as a child of that sh instance. When command finishes, the sh instance also finishes.

sh -c 'exec command'

runs a sh instance, then replaces that sh instance with the command binary, and runs that instead.

Of course, both of these are useless in this limited context; you simply want

command

There are some fringe situations where you want the shell to read its configuration file or somehow otherwise set up the environment as a preparation for running command. This is pretty much the sole situation where exec command is useful.

#!/bin/sh
ENVIRONMENT=$(some complex task)
exec command

This does some stuff to prepare the environment so that it contains what is needed. Once that's done, the sh instance is no longer necessary, and so it's a (minor) optimization to simply replace the sh instance with the command process, rather than have sh run it as a child process and wait for it, then exit as soon as it finishes.

Similarly, if you want to free up as much resources as possible for a heavyish command at the end of a shell script, you might want to exec that command as an optimization.

If something forces you to run sh but you really wanted to run something else, exec something else is of course a workaround to replace the undesired sh instance (like for example if you really wanted to run your own spiffy gosh instead of sh but yours isn't listed in /etc/shells so you can't specify it as your login shell).

The second use of exec to manipulate file descriptors is a separate topic. The accepted answer covers that nicely; to keep this self-contained, I'll just defer to the manual for anything where exec is followed by a redirect instead of a command name.

Remove all files except some from a directory

This is similar to the comment from @siwei-shen but you need the -o flag to do multiple patterns. The -o flag stands for 'or'

find . -type f -not -name '*ignore1' -o -not -name '*ignore2' | xargs rm

How do you see the entire command history in interactive Python?

A simple function to get the history similar to unix/bash version.

Hope it helps some new folks.

def ipyhistory(lastn=None):
    """
    param: lastn Defaults to None i.e full history. If specified then returns lastn records from history.
           Also takes -ve sequence for first n history records.
    """
    import readline
    assert lastn is None or isinstance(lastn, int), "Only integers are allowed."
    hlen = readline.get_current_history_length()
    is_neg = lastn is not None and lastn < 0
    if not is_neg:
        flen = len(str(hlen)) if not lastn else len(str(lastn))
        for r in range(1,hlen+1) if not lastn else range(1, hlen+1)[-lastn:]:
            print(": ".join([str(r if not lastn else r + lastn - hlen ).rjust(flen), readline.get_history_item(r)]))
    else:
        flen = len(str(-hlen))
        for r in range(1, -lastn + 1):
            print(": ".join([str(r).rjust(flen), readline.get_history_item(r)]))

Snippet: Tested with Python3. Let me know if there are any glitches with python2. Samples:

Full History : ipyhistory()

Last 10 History: ipyhistory(10)

First 10 History: ipyhistory(-10)

Hope it helps fellas.

Convert String to SecureString

I'll throw this out there. Why?

You can't just change all your strings to secure strings and suddenly your application is "secure". Secure string is designed to keep the string encrypted for as long as possible, and only decrypted for a very short period of time, wiping the memory after an operation has been performed upon it.

I would hazard saying that you may have some design level issues to deal with before worrying about securing your application strings. Give us some more information on what your trying to do and we may be able to help better.

How to switch databases in psql?

At the PSQL prompt, you can do:

\connect (or \c) dbname

Return Index of an Element in an Array Excel VBA

Dim pos, arr, val

arr=Array(1,2,4,5)
val = 4

pos=Application.Match(val, arr, False)

if not iserror(pos) then
   Msgbox val & " is at position " & pos
else
   Msgbox val & " not found!"
end if

Updated to show using Match (with .Index) to find a value in a dimension of a two-dimensional array:

Dim arr(1 To 10, 1 To 2)
Dim x

For x = 1 To 10
    arr(x, 1) = x
    arr(x, 2) = 11 - x
Next x

Debug.Print Application.Match(3, Application.Index(arr, 0, 1), 0)
Debug.Print Application.Match(3, Application.Index(arr, 0, 2), 0)

EDIT: it's worth illustrating here what @ARich pointed out in the comments - that using Index() to slice an array has horrible performance if you're doing it in a loop.

In testing (code below) the Index() approach is almost 2000-fold slower than using a nested loop.

Sub PerfTest()

    Const VAL_TO_FIND As String = "R1800:C8"
    Dim a(1 To 2000, 1 To 10)
    Dim r As Long, c As Long, t

    For r = 1 To 2000
        For c = 1 To 10
            a(r, c) = "R" & r & ":C" & c
        Next c
    Next r

    t = Timer
    Debug.Print FindLoop(a, VAL_TO_FIND), Timer - t
    ' >> 0.00781 sec

     t = Timer
    Debug.Print FindIndex(a, VAL_TO_FIND), Timer - t
    ' >> 14.18 sec

End Sub

Function FindLoop(arr, val) As Boolean
    Dim r As Long, c As Long
    For r = 1 To UBound(arr, 1)
    For c = 1 To UBound(arr, 2)
        If arr(r, c) = val Then
            FindLoop = True
            Exit Function
        End If
    Next c
    Next r
End Function

Function FindIndex(arr, val)
    Dim r As Long
    For r = 1 To UBound(arr, 1)
        If Not IsError(Application.Match(val, Application.Index(arr, r, 0), 0)) Then
            FindIndex = True
            Exit Function
        End If
    Next r
End Function

Git push rejected "non-fast-forward"

try this command

$ git push -f -u origin <name of branch>

i.e $ git push -f -u origin master

PHP Multiple Checkbox Array

You need to use the square brackets notation to have values sent as an array:

<form method='post' id='userform' action='thisform.php'>
<tr>
    <td>Trouble Type</td>
    <td>
    <input type='checkbox' name='checkboxvar[]' value='Option One'>1<br>
    <input type='checkbox' name='checkboxvar[]' value='Option Two'>2<br>
    <input type='checkbox' name='checkboxvar[]' value='Option Three'>3
    </td>
</tr>
</table>
<input type='submit' class='buttons'>
</form>

Please note though, that only the values of only checked checkboxes will be sent.

Modifying a file inside a jar

You can use Vim:

vim my.jar

Vim is able to edit compressed text files, given you have unzip in your environment.

Remove white space above and below large text in an inline-block element

I've been annoyed by this problem often. Vertical-align would only work on bottom and center, but never top! :-(

It seems I may have stumbled on a solution that works for both table elements and free paragraph elements. I hope we are at least talking similar problem here.

CSS:

p {
    font-family: "Times New Roman", Times, serif;
    font-size: 15px;
    background: #FFFFFF;
    margin: 0
    margin-top: 3px;
    margin-bottom: 10px;
}

For me, the margin settings sorted it out no matter where I put my "p>.../p>" code.

Hope this helps...

javascript node.js next()

This appears to be a variable naming convention in Node.js control-flow code, where a reference to the next function to execute is given to a callback for it to kick-off when it's done.

See, for example, the code samples here:

http://blog.mixu.net/2011/02/02/essential-node-js-patterns-and-snippets/

Let's look at the example you posted:

function loadUser(req, res, next) {
  if (req.session.user_id) {
    User.findById(req.session.user_id, function(user) {
      if (user) {
        req.currentUser = user;
        return next();
      } else {
        res.redirect('/sessions/new');
      }
    });
  } else {
    res.redirect('/sessions/new');
  }
}

app.get('/documents.:format?', loadUser, function(req, res) {
  // ...
});

The loadUser function expects a function in its third argument, which is bound to the name next. This is a normal function parameter. It holds a reference to the next action to perform and is called once loadUser is done (unless a user could not be found).

There's nothing special about the name next in this example; we could have named it anything.

Common elements comparison between 2 lists

I compared each of method that each answer mentioned. At this moment I use python 3.6.3 for this implementation. This is the code that I have used:

import time
import random
from decimal import Decimal


def method1():
    common_elements = [x for x in li1_temp if x in li2_temp]
     print(len(common_elements))


def method2():
    common_elements = (x for x in li1_temp if x in li2_temp)
    print(len(list(common_elements)))


def method3():
    common_elements = set(li1_temp) & set(li2_temp)
    print(len(common_elements))


def method4():
    common_elements = set(li1_temp).intersection(li2_temp)
    print(len(common_elements))


if __name__ == "__main__":
    li1 = []
    li2 = []
    for i in range(100000):
        li1.append(random.randint(0, 10000))
        li2.append(random.randint(0, 10000))

    li1_temp = list(set(li1))
    li2_temp = list(set(li2))

    methods = [method1, method2, method3, method4]
    for m in methods:
        start = time.perf_counter()
        m()
        end = time.perf_counter()
        print(Decimal((end - start)))

If you run this code you can see that if you use list or generator(if you iterate over generator, not just use it. I did this when I forced generator to print length of it), you get nearly same performance. But if you use set you get much better performance. Also if you use intersection method you will get a little bit better performance. the result of each method in my computer is listed bellow:

method1: 0.8150673999999999974619413478649221360683441
method2: 0.8329545000000001531148541289439890533685684
method3: 0.0016547000000000089414697868051007390022277
method4: 0.0010262999999999244948867271887138485908508

How do I check if a SQL Server text column is empty?

Actually, you just have to use the LIKE operator.

SELECT * FROM mytable WHERE mytextfield LIKE ''

Why does DEBUG=False setting make my django Static Files Access fail?

If you are using the static serve view in development, you have to have DEBUG = True :

Warning

This will only work if DEBUG is True.

That's because this view is grossly inefficient and probably insecure. This is only intended for local development, and should never be used in production.

Docs: serving static files in developent

EDIT: You could add some urls just to test your 404 and 500 templates, just use the generic view direct_to_template in your urls.

from django.views.generic.simple import direct_to_template

urlpatterns = patterns('',
    ('^404testing/$', direct_to_template, {'template': '404.html'})
)

How do I execute cmd commands through a batch file?

I know DOS and cmd prompt DOES NOT LIKE spaces in folder names. Your code starts with

cd c:\Program files\IIS Express

and it's trying to go to c:\Program in stead of C:\"Program Files"

Change the folder name and *.exe name. Hope this helps

After submitting a POST form open a new window showing the result

If you want to create and submit your form from Javascript as is in your question and you want to create popup window with custom features I propose this solution (I put comments above the lines i added):

var form = document.createElement("form");
form.setAttribute("method", "post");
form.setAttribute("action", "test.jsp");

// setting form target to a window named 'formresult'
form.setAttribute("target", "formresult");

var hiddenField = document.createElement("input");              
hiddenField.setAttribute("name", "id");
hiddenField.setAttribute("value", "bob");
form.appendChild(hiddenField);
document.body.appendChild(form);

// creating the 'formresult' window with custom features prior to submitting the form
window.open('test.html', 'formresult', 'scrollbars=no,menubar=no,height=600,width=800,resizable=yes,toolbar=no,status=no');

form.submit();

case in sql stored procedure on SQL Server

(SELECT CASE WHEN (SELECT  Salary FROM tbl_Salary WHERE Code=102 AND Month=1 AND Year=2020 )=0 THEN 'Pending'
WHEN (SELECT  Salary FROM tbl_Salary WHERE Code=102 AND Month=1 AND Year=2020 AND )<>0 THEN (SELECT CASE  WHEN ISNULL(ChequeNo,0) IS NOT NULL   THEN 'Deposit' ELSE 'Pending' END AS Deposite FROM tbl_EEsi WHERE  AND (Month= 1) AND (Year = 2020) AND )END AS Stat)

Two-dimensional array in Swift

This can be done in one simple line.

Swift 5

var my2DArray = (0..<4).map { _ in Array(0..<) }

You could also map it to instances of any class or struct of your choice

struct MyStructCouldBeAClass {
    var x: Int
    var y: Int
}

var my2DArray: [[MyStructCouldBeAClass]] = (0..<2).map { x in
    Array(0..<2).map { MyStructCouldBeAClass(x: x, y: $0)}
}

How to start an Intent by passing some parameters to it?

In order to pass the parameters you create new intent and put a parameter map:

Intent myIntent = new Intent(this, NewActivityClassName.class);
myIntent.putExtra("firstKeyName","FirstKeyValue");
myIntent.putExtra("secondKeyName","SecondKeyValue");
startActivity(myIntent);

In order to get the parameters values inside the started activity, you must call the get[type]Extra() on the same intent:

// getIntent() is a method from the started activity
Intent myIntent = getIntent(); // gets the previously created intent
String firstKeyName = myIntent.getStringExtra("firstKeyName"); // will return "FirstKeyValue"
String secondKeyName= myIntent.getStringExtra("secondKeyName"); // will return "SecondKeyValue"

If your parameters are ints you would use getIntExtra() instead etc. Now you can use your parameters like you normally would.

Regex for password must contain at least eight characters, at least one number and both lower and uppercase letters and special characters

Import the JavaScript file jquery.validate.min.js.

You can use this method:

$.validator.addMethod("pwcheck", function (value) {
    return /[\@\#\$\%\^\&\*\(\)\_\+\!]/.test(value) && /[a-z]/.test(value) && /[0-9]/.test(value) && /[A-Z]/.test(value)
});

At least one upper case English letter
At least one lower case English letter
At least one digit
At least one special character

How can I install Python's pip3 on my Mac?

I also encountered the same problem but brew install python3 does not work properly to install pip3.

brre will throw the warning The post-install step did not complete successfully.

It has to do with homebrew does not have permission to /usr/local

Create the directory if not exist

sudo mkdir lib 
sudo mkdir Frameworks

Give the permissions inside /usr/local to homebrew so it can access them:

sudo chown -R $(whoami) $(brew --prefix)/*

Now ostinstall python3

brew postinstall python3

This will give you a successful installation

How do I open port 22 in OS X 10.6.7

As per macOS 10.14.5, below are the details:

Go to

system preferences > sharing > remote login.

How to join a slice of strings into a single string?

This is still relevant in 2018.

To String

import strings
stringFiles := strings.Join(fileSlice[:], ",")

Back to Slice again

import strings
fileSlice := strings.Split(stringFiles, ",")

SQL Server Error : String or binary data would be truncated

You're trying to write more data than a specific column can store. Check the sizes of the data you're trying to insert against the sizes of each of the fields.

In this case transaction_status is a varchar(10) and you're trying to store 19 characters to it.

whitespaces in the path of windows filepath

Try putting double quotes in your filepath variable

"\"E:/ABC/SEM 2/testfiles/all.txt\""

Check the permissions of the file or in any case consider renaming the folder to remove the space

MVC4 input field placeholder

This works:

@Html.TextBox("name", null,  new { placeholder = "Text" })

Enzyme - How to access and set <input> value?

So lots of different opinions here. The only thing that worked for me was none of the above, it was using input.props().value. I hope that helps.

Using ffmpeg to change framerate

With re-encoding:

ffmpeg -y -i seeing_noaudio.mp4 -vf "setpts=1.25*PTS" -r 24 seeing.mp4

Without re-encoding:

First step - extract video to raw bitstream

ffmpeg -y -i seeing_noaudio.mp4 -c copy -f h264 seeing_noaudio.h264

Remux with new framerate

ffmpeg -y -r 24 -i seeing_noaudio.h264 -c copy seeing.mp4

replace special characters in a string python

You can replace the special characters with the desired characters as follows,

import string
specialCharacterText = "H#y #@w @re &*)?"
inCharSet = "!@#$%^&*()[]{};:,./<>?\|`~-=_+\""
outCharSet = "                               " #corresponding characters in inCharSet to be replaced
splCharReplaceList = string.maketrans(inCharSet, outCharSet)
splCharFreeString = specialCharacterText.translate(splCharReplaceList)

How to get current working directory in Java?

Use CodeSource#getLocation(). This works fine in JAR files as well. You can obtain CodeSource by ProtectionDomain#getCodeSource() and the ProtectionDomain in turn can be obtained by Class#getProtectionDomain().

public class Test {
    public static void main(String... args) throws Exception {
        URL location = Test.class.getProtectionDomain().getCodeSource().getLocation();
        System.out.println(location.getFile());
    }
}

Update as per the comment of the OP:

I want to dump a bunch of CSV files in a folder, have the program recognize all the files, then load the data and manipulate them. I really just want to know how to navigate to that folder.

That would require hardcoding/knowing their relative path in your program. Rather consider adding its path to the classpath so that you can use ClassLoader#getResource()

File classpathRoot = new File(classLoader.getResource("").getPath());
File[] csvFiles = classpathRoot.listFiles(new FilenameFilter() {
    @Override public boolean accept(File dir, String name) {
        return name.endsWith(".csv");
    }
});

Or to pass its path as main() argument.

How to load assemblies in PowerShell?

None of the answers helped me, so I'm posting the solution that worked for me, all I had to do is to import the SQLPS module, I realized this when by accident I ran the Restore-SqlDatabase command and started working, meaning that the assembly was referenced in that module somehow.

Just run:

Import-module SQLPS

Note: Thanks Jason for noting that SQLPS is deprecated

instead run:

Import-Module SqlServer

Install-Module SqlServer

Right pad a string with variable number of spaces

The easiest way to right pad a string with spaces (without them being trimmed) is to simply cast the string as CHAR(length). MSSQL will sometimes trim whitespace from VARCHAR (because it is a VARiable-length data type). Since CHAR is a fixed length datatype, SQL Server will never trim the trailing spaces, and will automatically pad strings that are shorter than its length with spaces. Try the following code snippet for example.

SELECT CAST('Test' AS CHAR(20))

This returns the value 'Test '.

String to byte array in php

PHP has no explicit byte type, but its string is already the equivalent of Java's byte array. You can safely write fputs($connection, "The quick brown fox …"). The only thing you must be aware of is character encoding, they must be the same on both sides. Use mb_convert_encoding() when in doubt.

Get list from pandas DataFrame column headers

A DataFrame follows the dict-like convention of iterating over the “keys” of the objects.

my_dataframe.keys()

Create a list of keys/columns - object method to_list() and pythonic way

my_dataframe.keys().to_list()
list(my_dataframe.keys())

Basic iteration on a DataFrame returns column labels

[column for column in my_dataframe]

Do not convert a DataFrame into a list, just to get the column labels. Do not stop thinking while looking for convenient code samples.

xlarge = pd.DataFrame(np.arange(100000000).reshape(10000,10000))
list(xlarge) #compute time and memory consumption depend on dataframe size - O(N)
list(xlarge.keys()) #constant time operation - O(1)

How to start and stop/pause setInterval?

See Working Demo on jsFiddle: http://jsfiddle.net/qHL8Z/3/

_x000D_

$(function() {_x000D_
  var timer = null,_x000D_
    interval = 1000,_x000D_
    value = 0;_x000D_
_x000D_
  $("#start").click(function() {_x000D_
    if (timer !== null) return;_x000D_
    timer = setInterval(function() {_x000D_
      $("#input").val(++value);_x000D_
    }, interval);_x000D_
  });_x000D_
_x000D_
  $("#stop").click(function() {_x000D_
    clearInterval(timer);_x000D_
    timer = null_x000D_
  });_x000D_
});

_x000D_

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>_x000D_
<input type="number" id="input" />_x000D_
<input id="stop" type="button" value="stop" />_x000D_
<input id="start" type="button" value="start" />

_x000D_

How do I get the application exit code from a Windows command line?

It's worth noting that .BAT and .CMD files operate differently.

Reading https://ss64.com/nt/errorlevel.html it notes the following:

There is a key difference between the way .CMD and .BAT batch files set errorlevels:

An old .BAT batch script running the 'new' internal commands: APPEND, ASSOC, PATH, PROMPT, FTYPE and SET will only set ERRORLEVEL if an error occurs. So if you have two commands in the batch script and the first fails, the ERRORLEVEL will remain set even after the second command succeeds.

This can make debugging a problem BAT script more difficult, a CMD batch script is more consistent and will set ERRORLEVEL after every command that you run [source].

This was causing me no end of grief as I was executing successive commands, but the ERRORLEVEL would remain unchanged even in the event of a failure.

Visual Studio debugging/loading very slow

The problem for me was the "Browser Link" feature that is very heavy when you have several tabs open for the same project !

Because every time we launched the project, it opens a new tab with browser link communications.

Just close all tabs associated with the project and keep only one open !

This free instantaneously visual studio ! It’s magic ! ;-)

“Browser Link is a feature since Visual Studio 2013 that creates a communication channel between the development environment and one or more web browsers. You can use Browser Link to refresh your web application in several browsers at once, which is useful for cross-browser testing.”

How to resolve the error "Unable to access jarfile ApacheJMeter.jar errorlevel=1" while initiating Jmeter?

If you'll go through these steps:

In the Terminal type brew install jmeter and hit Enter
When it'll be done type jmeter and hit Enter again

You won't have to solve any kind of issue. Don't thank

throwing exceptions out of a destructor

As an addition to the main answers, which are good, comprehensive and accurate, I would like to comment about the article you reference - the one that says "throwing exceptions in destructors is not so bad".

The article takes the line "what are the alternatives to throwing exceptions", and lists some problems with each of the alternatives. Having done so it concludes that because we can't find a problem-free alternative we should keep throwing exceptions.

The trouble is is that none of the problems it lists with the alternatives are anywhere near as bad as the exception behaviour, which, let's remember, is "undefined behaviour of your program". Some of the author's objections include "aesthetically ugly" and "encourage bad style". Now which would you rather have? A program with bad style, or one which exhibited undefined behaviour?

Error message "Strict standards: Only variables should be passed by reference"

The cause of the error is the use of the internal PHP programming data structures function, array_shift() [php.net/end].

The function takes an array as a parameter. Although an ampersand is indicated in the prototype of array_shift() in the manual", there isn't any cautionary documentation following in the extended definition of that function, nor is there any apparent explanation that the parameter is in fact passed by reference.

Perhaps this is /understood/. I did not understand, however, so it was difficult for me to detect the cause of the error.

Reproduce code:

function get_arr()
{
    return array(1, 2);
}
$array = get_arr();
$el = array_shift($array);

Check if a file exists locally using JavaScript only

No need for an external library if you use Nodejs all you need to do is import the file system module. feel free to edit the code below: const fs = require('fs')

const path = './file.txt'

fs.access(path, fs.F_OK, (err) => {
  if (err) {
    console.error(err)
    return
  }

  //file exists
})

Undo git pull, how to bring repos to old state

git pull do below operation.

i. git fetch

ii. git merge

To undo pull do any operation:

i. git reset --hard --- its revert all local change also

or

ii. git reset --hard master@{5.days.ago} (like 10.minutes.ago, 1.hours.ago, 1.days.ago ..) to get local changes.

or

iii. git reset --hard commitid

Improvement:

Next time use git pull --rebase instead of git pull.. its sync server change by doing ( fetch & merge).

Include CSS,javascript file in Yii Framework

Easy in your conf/main.php. This is my example with bootstrap. You can see that here

'components'=>array(
    'clientScript' => array(
        'scriptMap' => array(
            'jquery.js'=>false,  //disable default implementation of jquery
            'jquery.min.js'=>false,  //desable any others default implementation
            'core.css'=>false, //disable
            'styles.css'=>false,  //disable
            'pager.css'=>false,   //disable
            'default.css'=>false,  //disable
        ),
        'packages'=>array(
            'jquery'=>array(                             // set the new jquery
                'baseUrl'=>'bootstrap/',
                'js'=>array('js/jquery-1.7.2.min.js'),
            ),
            'bootstrap'=>array(                       //set others js libraries
                'baseUrl'=>'bootstrap/',
                'js'=>array('js/bootstrap.min.js'),
                'css'=>array(                        // and css
                    'css/bootstrap.min.css',
                    'css/custom.css',
                    'css/bootstrap-responsive.min.css',
                ),
                'depends'=>array('jquery'),         // cause load jquery before load this.
            ),
        ),
    ),
),

Default behavior of "git push" without a branch specified

You can push current branch with command

git push origin HEAD

(took from here)

Can I access a form in the controller?

Though alluded to in other comments I thought I'd spell it out a bit for those using the "Controller As" syntax:

<div ng-controller="MyController as ctrl">

<form name="ctrl.myForm">
    ...inputs
    Dirty? {{ctrl.myForm.$dirty}}

    <button ng-click="ctrl.saveChanges()">Save</button>
</form>

</div>

Then you can access the FormController in your code like:

function MyController () {
    var vm = this;
    vm.saveChanges = saveChanges;

    function saveChanges() {

       if(vm.myForm.$valid) { 
            // Save to db or whatever.
            vm.myForm.$setPristine();
       }
}

How can I check if a MySQL table exists with PHP?

mysql_query("SHOW TABLES FROM yourDB");
//> loop thru results and see if it exists
//> in this way with only one query one can check easly more table

or mysql_query("SHOW TABLES LIKE 'tblname'");

Don't use mysql_list_tables(); because it's deprecated

How do I create a comma-separated list from an array in PHP?

Sometimes you don't even need php for this in certain instances (List items each are in their own generic tag on render for example) You can always add commas to all elements but last-child via css if they are separate elements after being rendered from the script.

I use this a lot in backbone apps actually to trim some arbitrary code fat:

.likers a:not(:last-child):after { content: ","; }

Basically looks at the element, targets all except it's last element, and after each item it adds a comma. Just an alternative way to not have to use script at all if the case applies.

how to change the default positioning of modal in bootstrap?

I get a better result setting this class:

.modal-dialog {
  position: absolute;
  top: 50px;
  right: 100px;
  bottom: 0;
  left: 0;
  z-index: 10040;
  overflow: auto;
  overflow-y: auto;
}

With bootstrap 3.3.7.

(all credits to msnfreaky for the idea...)

Why does this CSS margin-top style not work?

Doesn't answer the "why" (has to be something w/ collapsing margin), but seems like the easiest/most logical way to do what you're trying to do would be to just add padding-top to the outer div:

http://jsfiddle.net/hpU5d/1/

Minor note - it shouldn't be necessary to set a div to display:block; unless there's something else in your code telling it not to be block.

CSS media queries for screen sizes

Unless you have more style sheets than that, you've messed up your break points:

#1 (max-width: 700px)
#2 (min-width: 701px) and (max-width: 900px)
#3 (max-width: 901px)

The 3rd media query is probably meant to be min-width: 901px. Right now, it overlaps #1 and #2, and only controls the page layout by itself when the screen is exactly 901px wide.

Edit for updated question:

(max-width: 640px)
(max-width: 800px)
(max-width: 1024px)
(max-width: 1280px)

Media queries aren't like catch or if/else statements. If any of the conditions match, then it will apply all of the styles from each media query it matched. If you only specify a min-width for all of your media queries, it's possible that some or all of the media queries are matched. In your case, a device that's 640px wide matches all 4 of your media queries, so all for style sheets are loaded. What you are most likely looking for is this:

(max-width: 640px)
(min-width: 641px) and (max-width: 800px)
(min-width: 801px) and (max-width: 1024px)
(min-width: 1025px)

Now there's no overlap. The styles will only apply if the device's width falls between the widths specified.

Warning: mysqli_query() expects parameter 1 to be mysqli, null given in

As mentioned in comments, this is a scoping issue. Specifically, $con is not in scope within your getPosts function.

You should pass your connection object in as a dependency, eg

function getPosts(mysqli $con) {
    // etc

I would also highly recommend halting execution if your connection fails or if errors occur. Something like this should suffice

mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT); // throw exceptions
$con=mysqli_connect("localhost","xxxx","xxxx","xxxxx");

getPosts($con);

Youtube - How to force 480p video quality in embed link / <iframe>

You can also use for 1080 hd values:

240p: &vq=small , 360p: &vq=medium , 480p: &vq=large , 720p: &vq=hd720 , &vq=hd1080

Get selected text from a drop-down list (select box) using jQuery

Simply try the following code.

var text= $('#yourslectbox').find(":selected").text();

it returns the text of the selected option.

Hide Spinner in Input Number - Firefox 29

In SASS/SCSS style, you can write like this:

input[type='number'] {
  -moz-appearance: textfield;/*For FireFox*/

  &::-webkit-inner-spin-button { /*For Webkits like Chrome and Safari*/
    -webkit-appearance: none;
    margin: 0;
  }
}

Definitely this code style can use in PostCSS.

Spring Security redirect to previous page after successful login

You can use a Custom SuccessHandler extending SimpleUrlAuthenticationSuccessHandler for redirecting users to different URLs when login according to their assigned roles.

CustomSuccessHandler class provides custom redirect functionality:

package com.mycompany.uomrmsweb.configuration;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.web.DefaultRedirectStrategy;
import org.springframework.security.web.RedirectStrategy;
import org.springframework.security.web.authentication.SimpleUrlAuthenticationSuccessHandler;
import org.springframework.stereotype.Component;

@Component
public class CustomSuccessHandler extends SimpleUrlAuthenticationSuccessHandler{

    private RedirectStrategy redirectStrategy = new DefaultRedirectStrategy();

    @Override
    protected void handle(HttpServletRequest request, HttpServletResponse response, Authentication authentication) throws IOException {
        String targetUrl = determineTargetUrl(authentication);

        if (response.isCommitted()) {
            System.out.println("Can't redirect");
            return;
        }

        redirectStrategy.sendRedirect(request, response, targetUrl);
    }

    protected String determineTargetUrl(Authentication authentication) {
        String url="";

        Collection<? extends GrantedAuthority> authorities =  authentication.getAuthorities();

        List<String> roles = new ArrayList<String>();

        for (GrantedAuthority a : authorities) {
            roles.add(a.getAuthority());
        }

        if (isStaff(roles)) {
            url = "/staff";
        } else if (isAdmin(roles)) {
            url = "/admin";
        } else if (isStudent(roles)) {
            url = "/student";
        }else if (isUser(roles)) {
            url = "/home";
        } else {
            url="/Access_Denied";
        }

        return url;
    }

    public void setRedirectStrategy(RedirectStrategy redirectStrategy) {
        this.redirectStrategy = redirectStrategy;
    }
    protected RedirectStrategy getRedirectStrategy() {
        return redirectStrategy;
    }

    private boolean isUser(List<String> roles) {
        if (roles.contains("ROLE_USER")) {
            return true;
        }
        return false;
    }

    private boolean isStudent(List<String> roles) {
        if (roles.contains("ROLE_Student")) {
            return true;
        }
        return false;
    }

    private boolean isAdmin(List<String> roles) {
        if (roles.contains("ROLE_SystemAdmin") || roles.contains("ROLE_ExaminationsStaff")) {
            return true;
        }
        return false;
    }

    private boolean isStaff(List<String> roles) {
        if (roles.contains("ROLE_AcademicStaff") || roles.contains("ROLE_UniversityAdmin")) {
            return true;
        }
        return false;
    }
}

Extending Spring SimpleUrlAuthenticationSuccessHandler class and overriding handle() method which simply invokes a redirect using configured RedirectStrategy [default in this case] with the URL returned by the user defined determineTargetUrl() method. This method extracts the Roles of currently logged in user from Authentication object and then construct appropriate URL based on there roles. Finally RedirectStrategy , which is responsible for all redirections within Spring Security framework , redirects the request to specified URL.

Registering CustomSuccessHandler using SecurityConfiguration class:

package com.mycompany.uomrmsweb.configuration;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.userdetails.UserDetailsService;

@Configuration
@EnableWebSecurity
public class SecurityConfiguration extends WebSecurityConfigurerAdapter {

    @Autowired
    @Qualifier("customUserDetailsService")
    UserDetailsService userDetailsService;

    @Autowired
    CustomSuccessHandler customSuccessHandler;

    @Autowired
    public void configureGlobalSecurity(AuthenticationManagerBuilder auth) throws Exception {
            auth.userDetailsService(userDetailsService);
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests()
        .antMatchers("/", "/home").access("hasRole('USER')")
        .antMatchers("/admin/**").access("hasRole('SystemAdmin') or hasRole('ExaminationsStaff')")
        .antMatchers("/staff/**").access("hasRole('AcademicStaff') or hasRole('UniversityAdmin')")
        .antMatchers("/student/**").access("hasRole('Student')")  
                    .and().formLogin().loginPage("/login").successHandler(customSuccessHandler)
        .usernameParameter("username").passwordParameter("password")
        .and().csrf()
        .and().exceptionHandling().accessDeniedPage("/Access_Denied");
    }
}

successHandler is the class responsible for eventual redirection based on any custom logic, which in this case will be to redirect the user [to student/admin/staff ] based on his role [USER/Student/SystemAdmin/UniversityAdmin/ExaminationsStaff/AcademicStaff].

How to create a signed APK file using Cordova command line interface?

First Check your version code and version name if you are updating your app. And make sure you have a previous keystore.

If you are updating app then follow step 1,3,4.

Step 1:

Goto your cordova project for generate our release build:

D:\projects\Phonegap\Example> cordova build --release android

Then, we can find our unsigned APK file in platforms/android/ant-build. In our example, the file was

if u used ant-build

yourproject/platforms/android/ant-build/Example-release-unsigned.apk

if u used gradle-build

yourProject/platforms/android/build/outputs/apk/Example-release-unsigned.apk

Step 2:

Key Generation:

Syntax:

keytool -genkey -v -keystore <keystoreName>.keystore -alias <Keystore AliasName> -keyalg <Key algorithm> -keysize <Key size> -validity <Key Validity in Days>

if keytool command not recognize do this step

Check that the directory the keytool executable is in is on your path. (For example, on my Windows 7 machine, it's in C:\Program Files (x86)\Java\jre6\bin.)

Example:

keytool -genkey -v -keystore NAME-mobileapps.keystore -alias NAMEmobileapps -keyalg RSA -keysize 2048 -validity 10000


keystore password? : xxxxxxx
What is your first and last name? :  xxxxxx
What is the name of your organizational unit? :  xxxxxxxx
What is the name of your organization? :  xxxxxxxxx
What is the name of your City or Locality? :  xxxxxxx
What is the name of your State or Province? :  xxxxx
What is the two-letter country code for this unit? :  xxx

Then the Key store has been generated with name as NAME-mobileapps.keystore

Step 3:

Place the generated keystore in D:\projects\Phonegap\Example\platforms\android\ant-build

To sign the unsigned APK, run the jarsigner tool which is also included in the JDK:

Syntax:

jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore <keystorename <Unsigned APK file> <Keystore Alias name>

If it doesn't reconize do these steps

(1) Right click on "This PC" > right-click Properties > Advanced system settings > Environment Variables > select PATH then EDIT.

(2) Add your jdk bin folder path to environment variables, it should look like this:

"C:\Program Files\Java\jdk1.8.0_40\bin".

Example:

D:\projects\Phonegap\Example\platforms\android\ant-build> jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore NAME-mobileapps.keystore Example-release-unsigned.apk xxxxxmobileapps

Enter KeyPhrase as 'xxxxxxxx'

This signs the apk in place.

Step 4:

Finally, we need to run the zip align tool to optimize the APK:

if zipalign not recognize then

(1) goto your android sdk path and find zipalign it is usually in android-sdk\build-tools\23.0.3

(2) Copy zipalign file paste into your generate release apk folder usually in below path

yourproject/platforms/android/ant-build/Example-release-unsigned.apk

D:\projects\Phonegap\Example\platforms\android\ant-build> zipalign -v 4 Example-release-unsigned.apk Example.apk

D:\projects\Phonegap\Example\platforms\android\ant-build> C:\Phonegap\adt-bundle-windows-x86_64-20140624\sdk\build-tools\android-4.4W\zipalign -v 4 Example-release-unsigned.apk Example.apk

Now we have our final release binary called example.apk and we can release this on the Google Play Store.

How to use Google App Engine with my own naked domain (not subdomain)?

Another solution which is given by Google is URL forwarding: http://www.google.com/support/a/bin/answer.py?hl=en-in&answer=61057

Forbidden :You don't have permission to access /phpmyadmin on this server

With the latest version of phpmyadmin 5.0.2+ at least

Check that the actual installation was completed correctly,

Mine had been copied over into a sub folder on a linux machine rather that being at the

/usr/share/phpmyadmin/

ExpressionChangedAfterItHasBeenCheckedError: Expression has changed after it was checked. Previous value: 'undefined'

The ngAfterContentChecked lifecycle hook is triggered when bindings updates for the child components/directives have been already been finished. But you're updating the property that is used as a binding input for the ngClass directive. That is the problem. When Angular runs validation stage it detects that there's a pending update to the properties and throws the error.

To understand the error better, read these two articles:

Think about why you need to change the property in the ngAfterViewInit lifecycle hook. Any other lifecycle that is triggered before ngAfterViewInit/Checked will work, for example ngOnInit or ngDoCheck or ngAfterContentChecked.

So to fix it move renderWidgetInsideWidgetContainer to the ngOnInit() lifecycle hook.

How to access the contents of a vector from a pointer to the vector in C++?

Do you have a pointer to a vector because that's how you've coded it? You may want to reconsider this and use a (possibly const) reference. For example:

#include <iostream>
#include <vector>

using namespace std;

void foo(vector<int>* a)
{
    cout << a->at(0) << a->at(1) << a->at(2) << endl;
    // expected result is "123"
}

int main()
{
    vector<int> a;
    a.push_back(1);
    a.push_back(2);
    a.push_back(3);

    foo(&a);
}

While this is a valid program, the general C++ style is to pass a vector by reference rather than by pointer. This will be just as efficient, but then you don't have to deal with possibly null pointers and memory allocation/cleanup, etc. Use a const reference if you aren't going to modify the vector, and a non-const reference if you do need to make modifications.

Here's the references version of the above program:

#include <iostream>
#include <vector>

using namespace std;

void foo(const vector<int>& a)
{
    cout << a[0] << a[1] << a[2] << endl;
    // expected result is "123"
}

int main()
{
    vector<int> a;
    a.push_back(1);
    a.push_back(2);
    a.push_back(3);

    foo(a);
}

As you can see, all of the information contained within a will be passed to the function foo, but it will not copy an entirely new value, since it is being passed by reference. It is therefore just as efficient as passing by pointer, and you can use it as a normal value rather than having to figure out how to use it as a pointer or having to dereference it.

Selenium WebDriver: Wait for complex page with JavaScript to load

If all you need to do is wait for the html on the page to become stable before trying to interact with elements, you can poll the DOM periodically and compare the results, if the DOMs are the same within the given poll time, you're golden. Something like this where you pass in the maximum wait time and the time between page polls before comparing. Simple and effective.

public void waitForJavascript(int maxWaitMillis, int pollDelimiter) {
    double startTime = System.currentTimeMillis();
    while (System.currentTimeMillis() < startTime + maxWaitMillis) {
        String prevState = webDriver.getPageSource();
        Thread.sleep(pollDelimiter); // <-- would need to wrap in a try catch
        if (prevState.equals(webDriver.getPageSource())) {
            return;
        }
    }
}

Laravel 5 – Remove Public from URL

Create A .htaccess file in your root DIR and paste the below code. That's it :P

_x000D_

RewriteEngine On

RewriteCond %{REQUEST_FILENAME} -d [OR]
RewriteCond %{REQUEST_FILENAME} -f
RewriteRule ^ ^$1 [N]

RewriteCond %{REQUEST_URI} (\.\w+$) [NC]
RewriteRule ^(.*)$ public/$1 

RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^ server.php

_x000D_

How to redirect to another page using AngularJS?

You can redirect to a new URL in different ways.

You can use $window which will also refresh the page
You can "stay inside" the single page app and use $location in which case you can choose between $location.path(YOUR_URL); or $location.url(YOUR_URL);. So the basic difference between the 2 methods is that $location.url() also affects get parameters whilst $location.path() does not.

I would recommend reading the docs on $location and $window so you get a better grasp on the differences between them.

How to set upload_max_filesize in .htaccess?

Both commands are correct

php_value post_max_size 30M

php_value upload_max_filesize 30M

BUT to use the .htaccess you have to enable rewrite_module in Apache config file. In httpd.conf find this line:

# LoadModule rewrite_module modules/mod_rewrite.so

and remove the #.

How should you diagnose the error SEHException - External component has thrown an exception

I had a similar problem with an SEHException that was thrown when my program first used a native dll wrapper. Turned out that the native DLL for that wrapper was missing. The exception was in no way helpful in solving this. What did help in the end was running procmon in the background and checking if there were any errors when loading all the necessary DLLs.

Mac OS X and multiple Java versions

I am using Mac OS X 10.9.5. This is how I manage multiple JDK/JRE on my machine when I need one version to run application A and use another version for application B.

I created the following script after getting some help online.

#!bin/sh
function setjdk() {
  if [ $# -ne 0 ]; then
   removeFromPath '/Library/Java/JavaVirtualMachines/'
   if [ -n "${JAVA_HOME+x}" ]; then
    removeFromPath $JAVA_HOME
   fi
   export JAVA_HOME=/Library/Java/JavaVirtualMachines/$1/Contents/Home
   export PATH=$JAVA_HOME/bin:$PATH
  fi
 }
 function removeFromPath() {
  export PATH=$(echo $PATH | sed -E -e "s;:$1;;" -e "s;$1:?;;")
 }
#setjdk jdk1.8.0_60.jdk
setjdk jdk1.7.0_15.jdk

I put the above script in .profile file. Just open terminal, type vi .profile, append the script with the above snippet and save it. Once your out type source .profile, this will run your profile script without you having to restart the terminal. Now type java -version it should show 1.7 as your current version. If you intend to change it to 1.8 then comment the line setjdk jdk1.7.0_15.jdk and uncomment the line setjdk jdk1.8.0_60.jdk. Save the script and run it again with source command. I use this mechanism to manage multiple versions of JDK/JRE when I have to compile 2 different Maven projects which need different java versions.

Remote Procedure call failed with sql server 2008 R2

Open Control Panel > Administrative Tools > Services > Select Standard services tab (under the bottom) > Find start SQL Server Agent

Right Click and select properties,

Startup Type : Automatic,

Apply, Ok.

Done.

error running apache after xampp install

After changing main port from 80 to 8080 you have to change the config in XAMPP control panel as I show in the images:

Then restart the service and that's it !

Spring MVC Missing URI template variable

I got this error for a stupid mistake, the variable name in the @PathVariable wasn't matching the one in the @RequestMapping

For example

@RequestMapping(value = "/whatever/{**contentId**}", method = RequestMethod.POST)
public … method(@PathVariable Integer **contentID**){
}

It may help others

How to get a list of all files that changed between two Git commits?

For files changed between a given SHA and your current commit:

git diff --name-only <starting SHA> HEAD

or if you want to include changed-but-not-yet-committed files:

git diff --name-only <starting SHA>

More generally, the following syntax will always tell you which files changed between two commits (specified by their SHAs or other names):

git diff --name-only <commit1> <commit2>

Adding options to a <select> using jQuery?

if u have optgroup inside select, u got error in DOM.

I think a best way:

$("#select option:last").after($('<option value="1">my option</option>'));

Java - No enclosing instance of type Foo is accessible

Declare the INNER class Thing as a static and it will work with no issues.

I remember I have the same issue with the inner class Dog when I declared it as class Dog { only. I got the same issue as you did. There were two solutions:

1- To declare the inner class Dog as static. Or

2- To move the inner class Dog to a new class by itself.

Here is the Example:

public class ReturnDemo {

public static void main(String[] args) {
    
    int z = ReturnDemo.calculate(10, 12);
    System.out.println("z = " + z);
    
    ReturnDemo.Dog dog = new Dog("Bosh", " Doggy");
    System.out.println( dog.getDog());
}


public static int calculate (int x, int y) {
    return x + y;
}

public void print( ) {
    System.out.println("void method");
    return;
}

public String getString() {
    return "Retrun String type value";
}


static class Dog {
    
private String breed;
private String name;

public Dog(String breed, String name) {
    super();
    this.breed = breed;
    this.name = name;
}

public Dog getDog() {
    // return Dog type;
    return this;
    
}

public String toString() {
    return "breed" + breed.concat("name: " + name);
}
}

}

Check/Uncheck all the checkboxes in a table

All CheckBox Checked

$("input[type=checkbox]").prop('checked', true);

Solving sslv3 alert handshake failure when trying to use a client certificate

Not a definite answer but too much to fit in comments:

I hypothesize they gave you a cert that either has a wrong issuer (although their server could use a more specific alert code for that) or a wrong subject. We know the cert matches your privatekey -- because both curl and openssl client paired them without complaining about a mismatch; but we don't actually know it matches their desired CA(s) -- because your curl uses openssl and openssl SSL client does NOT enforce that a configured client cert matches certreq.CAs.

Do openssl x509 <clientcert.pem -noout -subject -issuer and the same on the cert from the test P12 that works. Do openssl s_client (or check the one you did) and look under Acceptable client certificate CA names; the name there or one of them should match (exactly!) the issuer(s) of your certs. If not, that's most likely your problem and you need to check with them you submitted your CSR to the correct place and in the correct way. Perhaps they have different regimes in different regions, or business lines, or test vs prod, or active vs pending, etc.

If the issuer of your cert does match desiredCAs, compare its subject to the working (test-P12) one: are they in similar format? are there any components in the working one not present in yours? If they allow it, try generating and submitting a new CSR with a subject name exactly the same as the test-P12 one, or as close as you can get, and see if that produces a cert that works better. (You don't have to generate a new key to do this, but if you choose to, keep track of which certs match which keys so you don't get them mixed up.) If that doesn't help look at the certificate extensions with openssl x509 <cert -noout -text for any difference(s) that might reasonably be related to subject authorization, like KeyUsage, ExtendedKeyUsage, maybe Policy, maybe Constraints, maybe even something nonstandard.

If all else fails, ask the server operator(s) what their logs say about the problem, or if you have access look at the logs yourself.

SQL Server: how to select records with specific date from datetime column

For Perfect DateTime Match in SQL Server

SELECT ID FROM [Table Name] WHERE (DateLog between '2017-02-16 **00:00:00.000**' and '2017-12-16 **23:59:00.999**') ORDER BY DateLog DESC

Java - Opposite of .contains (does not contain)

It seems that Luiggi Mendoza and joey rohan both already answered this, but I think it can be clarified a little.

You can write it as a single if statement:

if (inventory.contains("bread") && !inventory.contains("water")) {
    // do something
}

Delete terminal history in Linux

You can clear your bash history like this:

history -cw

How to align LinearLayout at the center of its parent?

Please try this in your linear layout

android:layout_centerHorizontal="true"
android:layout_centerVertical="true"

Is it possible to run CUDA on AMD GPUs?

I think it is going to be possible soon in AMD FirePro GPU's, see press release here but support is coming 2016 Q1 for the developing tools:

An early access program for the "Boltzmann Initiative" tools is planned for Q1 2016.

Asynchronous Function Call in PHP

I dont have a direct answer, but you might want to look into these things:

Recoil project - https://github.com/recoilphp/recoil
php's LibEvent extension? http://www.php.net/manual/en/book.libevent.php
process forking http://www.php.net/manual/en/function.pcntl-fork.php
message brokers, i.e. you could start workers to make the HTTP calls and once that job is done, insert a new job describing the work that needs to be done in order to process the cached HTTP response body.

Why am I getting Unknown error in line 1 of pom.xml?

As per the suggestion from @Shravani, in my pom.xml file, I changed my version number in the area from this:

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.1.5.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

to this:

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.1.4.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

I then right clicked on the project and did a 'Maven -> Update project...'. This made the problem go away for me.

Jenkins fails when running "service start jenkins"

Still fighting the same error on both ubuntu, ubuntu derivatives and opensuse. This is a great way to bypass and move forward until you can fix the actual issue.

Just use the docker image for jenkins from dockerhub.

docker pull jenkins/jenkins

docker run -itd -p 8080:8080 --name jenkins_container jenkins

Use the browser to navigate to:

localhost:8080 or my_pc:8080

To get at the token at the path given on the login screen:

docker exec -it jenkins_container /bin/bash

Then navigate to the token file and copy/paste the code into the login screen. You can use the edit/copy/paste menus in the kde/gnome/lxde/xfce terminals to copy the terminal text, then paste it with ctrl-v

War File

Or use the jenkins.war file. For development purposes you can run jenkins as your user (or as jenkins) from the command line or create a short script in /usr/local or /opt to start it.

Download the jenkins.war from the jenkins download page:

https://jenkins.io/download/

Then put it somewhere safe, ~/jenkins would be a good place.

mkdir ~/jenkins; cp ~/Downloads/jenkins.war ~/jenkins

Then run:

nohup java -jar ~/jenkins/jenkins.war > ~/jenkins/jenkins.log 2>&1

To get the initial admin password token, copy the text output of:

cat /home/my_home_dir/.jenkins/secrets/initialAdminPassword

and paste that into the box with ctrl-v as your initial admin password.

Hope this is detailed enough to get you on your way...

Connect to docker container as user other than root

As an updated answer from 2020. --user , -u option is Username or UID (format: <name|uid>[:<group|gid>]).

Then, it works for me like this,

docker exec -it -u root:root container /bin/bash

Reference: https://docs.docker.com/engine/reference/commandline/exec/

Finalize vs Dispose

As we know dispose and finalize both are used to free unmanaged resources.. but the difference is finalize uses two cycle to free the resources , where as dispose uses one cycle..

How to restart ADB manually from Android Studio

Open a Task Manager by pressing CTRL+ALT+DELETE, or right click at the bottom of the start menu and select Start Task Manager. see how to launch the task manager here
Click on Processes or depending on OS, Details. Judging by your screenshot it's Processes.
Look for adb.exe from that list, click on END PROCESS
Click on the restart button in that window above. That should do it.

Basically by suddenly removing your device ADB got confused and won't respond while waiting for a device, and Android Studio doesn't want multiple instances of an ADB server running, so you'll have to kill the previous server manually and restart the whole process.

How to hide soft keyboard on android after clicking outside EditText?

Just Add this code in the class @Overide

public boolean dispatchTouchEvent(MotionEvent ev) {
    View view = getCurrentFocus();
    if (view != null && (ev.getAction() == MotionEvent.ACTION_UP || ev.getAction() == MotionEvent.ACTION_MOVE) && view instanceof EditText && !view.getClass().getName().startsWith("android.webkit.")) {
        int scrcoords[] = new int[2];
        view.getLocationOnScreen(scrcoords);
        float x = ev.getRawX() + view.getLeft() - scrcoords[0];
        float y = ev.getRawY() + view.getTop() - scrcoords[1];
        if (x < view.getLeft() || x > view.getRight() || y < view.getTop() || y > view.getBottom())
            ((InputMethodManager)this.getSystemService(Context.INPUT_METHOD_SERVICE)).hideSoftInputFromWindow((this.getWindow().getDecorView().getApplicationWindowToken()), 0);
    }
    return super.dispatchTouchEvent(ev);
}

How to block calls in android

It is possible and you don't need to code it on your own.

Just set the ringer volume to zero and vibration to none if incomingNumber equals an empty string. Thats it ...

Its just done for you with the application Nostalk from Android Market. Just give it a try ...

How can I access the MySQL command line with XAMPP for Windows?

Xampp control panel v2.3.1 I got errors while using -h localhost

mysql -h localhost -u root

ERROR 2003 (HY000): Can't connect to MySQL server on 'localhost' (10060)

So, if you installed xampp as is and did not customize any documentroot, serverroot, etc. then the following works :-

start both the services on the xampp control panel click shell enter: # mysql -h 127.0.0.1 -u root

that works just fine. Below is the logtrail:-

# mysql -h 127.0.0.1 -u root
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.21 MySQL Community Server (GPL)

Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql>

How to solve "java.io.IOException: error=12, Cannot allocate memory" calling Runtime#exec()?

You can use the Tanuki wrapper to spawn a process with POSIX spawn instead of fork. http://wrapper.tanukisoftware.com/doc/english/child-exec.html

The WrapperManager.exec() function is an alternative to the Java-Runtime.exec() which has the disadvantage to use the fork() method, which can become on some platforms very memory expensive to create a new process.

How to use group by with union in t-sql

You need to alias the subquery. Thus, your statement should be:

Select Z.id
From    (
        Select id, time
        From dbo.tablea
        Union All
        Select id, time
        From dbo.tableb
        ) As Z
Group By Z.id

Button Listener for button in fragment in android

You only have to get the view of activity that carry this fragment and this could only happen when your fragment is already created

override the onViewCreated() method inside your fragment and enjoy its magic :) ..

@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    Button button = (Button) view.findViewById(R.id.YOURBUTTONID);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
         //place your action here
         }
    });

Hope this could help you ;

Calling async method on button click

This is what's killing you:

task.Wait();

That's blocking the UI thread until the task has completed - but the task is an async method which is going to try to get back to the UI thread after it "pauses" and awaits an async result. It can't do that, because you're blocking the UI thread...

There's nothing in your code which really looks like it needs to be on the UI thread anyway, but assuming you really do want it there, you should use:

private async void Button_Click(object sender, RoutedEventArgs 
{
    Task<List<MyObject>> task = GetResponse<MyObject>("my url");
    var items = await task;
    // Presumably use items here
}

Or just:

private async void Button_Click(object sender, RoutedEventArgs 
{
    var items = await GetResponse<MyObject>("my url");
    // Presumably use items here
}

Now instead of blocking until the task has completed, the Button_Click method will return after scheduling a continuation to fire when the task has completed. (That's how async/await works, basically.)

Note that I would also rename GetResponse to GetResponseAsync for clarity.

Close a MessageBox after several seconds

I did it like this

var owner = new Form { TopMost = true };
Task.Delay(30000).ContinueWith(t => {
owner.Invoke(new Action(()=>
{
      if (!owner.IsDisposed)
      {
          owner.Close();
      }
   }));
});
var dialogRes =  MessageBox.Show(owner, msg, "Info", MessageBoxButtons.YesNo, MessageBoxIcon.Information);

Convert Int to String in Swift

iam using this simple approach

String to Int:

 var a = Int()
var string1 = String("1")
a = string1.toInt()

and from Int to String:

var a = Int()
a = 1
var string1 = String()
 string1= "\(a)"

Bootstrap-select - how to fire event on change

My implementation

import $ from 'jquery';

$(document).ready(() => {
  $('#whatDescribesYouSelectInput').on('change', (e) => {
    if (e.target.value === 'Other') {
      $('#whatDescribesYouOtherInput').attr('type', 'text');
      $('#specifyLabel').show();
    } else {
      $('#whatDescribesYouOtherInput').attr('type', 'hidden');
      $('#specifyLabel').hide();
    }
  });
});

Javascript to sort contents of select element

Vanilla JS es6 Localization Options Sorting Example

const optionNodes = Array.from(selectNode.children);
const comparator = new Intl.Collator(lang.slice(0, 2)).compare;

optionNodes.sort((a, b) => comparator(a.textContent, b.textContent));
optionNodes.forEach((option) => selectNode.appendChild(option));

My use case was to localize a country select dropdown with locale aware sorting. This was used on 250 + options and was very performant ~10ms on my machine.

What is the difference between Serialization and Marshaling?

Marshaling uses Serialization process actually but the major difference is that it in Serialization only data members and object itself get serialized not signatures but in Marshalling Object + code base(its implementation) will also get transformed into bytes.

Marshalling is the process to convert java object to xml objects using JAXB so that it can be used in web services.

The PowerShell -and conditional operator

Another option:

if( ![string]::IsNullOrEmpty($user_sam) -and ![string]::IsNullOrEmpty($user_case) )
{
   ...
}

Java: Insert multiple rows into MySQL with PreparedStatement

If you can create your sql statement dynamically you can do following workaround:

String myArray[][] = { { "1-1", "1-2" }, { "2-1", "2-2" }, { "3-1", "3-2" } };

StringBuffer mySql = new StringBuffer("insert into MyTable (col1, col2) values (?, ?)");

for (int i = 0; i < myArray.length - 1; i++) {
    mySql.append(", (?, ?)");
}

myStatement = myConnection.prepareStatement(mySql.toString());

for (int i = 0; i < myArray.length; i++) {
    myStatement.setString(i, myArray[i][1]);
    myStatement.setString(i, myArray[i][2]);
}
myStatement.executeUpdate();

Split a string into array in Perl

You already have multiple answers to your question, but I would like to add another minor one here that might help to add something.

To view data structures in Perl you can use Data::Dumper. To print a string you can use say, which adds a newline character "\n" after every call instead of adding it explicitly.

I usually use \s which matches a whitespace character. If you add + it matches one or more whitespace characters. You can read more about it here perlre.

#!/usr/bin/perl

use strict;
use warnings;

use Data::Dumper;

use feature 'say';

my $line = "file1.gz file2.gz file3.gz";
my @abc  = split /\s+/, $line;

print Dumper \@abc;
say for @abc;

How to send objects through bundle

You could use the global application state.

Update:

Customize and then add this to your AndroidManifest.xml :

<application android:label="@string/app_name" android:debuggable="true" android:name=".CustomApplication"

And then have a class in your project like this :

package com.example;

import android.app.Application;

public class CustomApplication extends Application {
    public int someVariable = -1;
}

And because "It can be accessed via getApplication() from any Activity or Service", you use it like this:

CustomApplication application = (CustomApplication)getApplication();
application.someVariable = 123;

Hope that helps.

Convert from ASCII string encoded in Hex to plain ASCII?

Tested in Python 3.3.2 There are many ways to accomplish this, here's one of the shortest, using only python-provided stuff:

import base64
hex_data ='57696C6C20796F7520636F6E76657274207468697320484558205468696E6720696E746F20415343494920666F72206D653F2E202E202E202E506C656565656173652E2E2E212121'
ascii_string = str(base64.b16decode(hex_data))[2:-1]
print (ascii_string)

Of course, if you don't want to import anything, you can always write your own code. Something very basic like this:

ascii_string = ''
x = 0
y = 2
l = len(hex_data)
while y <= l:
    ascii_string += chr(int(hex_data[x:y], 16))
    x += 2
    y += 2
print (ascii_string)

jQuery hasAttr checking to see if there is an attribute on an element

How about just $(this).is("[name]")?

The [attr] syntax is the CSS selector for an element with an attribute attr, and .is() checks if the element it is called on matches the given CSS selector.

Pandas count(distinct) equivalent

I believe this is what you want:

table.groupby('YEARMONTH').CLIENTCODE.nunique()

Example:

In [2]: table
Out[2]: 
   CLIENTCODE  YEARMONTH
0           1     201301
1           1     201301
2           2     201301
3           1     201302
4           2     201302
5           2     201302
6           3     201302

In [3]: table.groupby('YEARMONTH').CLIENTCODE.nunique()
Out[3]: 
YEARMONTH
201301       2
201302       3

How can I convert a string with dot and comma into a float in Python

Just replace, with replace().

f = float("123,456.908".replace(',','')) print(type(f)

type() will show you that it has converted into a float

How to set the initial zoom/width for a webview

in Kotlin You can use,

webView.isScrollbarFadingEnabled = true
webView.setInitialScale(100)

Generate random numbers following a normal distribution in C/C++

A quick and easy method is just to sum a number of evenly distributed random numbers and take their average. See the Central Limit Theorem for a full explanation of why this works.

Getting value from a cell from a gridview on RowDataBound event

protected void gvbind_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        e.Row.Attributes["onmouseover"] = "this.style.cursor='hand';";
        e.Row.Attributes["onmouseout"] = "this.style.textDecoration='none';";
        e.Row.Attributes["onclick"] = ClientScript.GetPostBackClientHyperlink(this.gvbind, "Select$" + e.Row.RowIndex);
    }
}

Which version of CodeIgniter am I currently using?

you can easily find the current CodeIgniter version by

echo CI_VERSION 


or you can navigate to System->core->codeigniter.php file and you can see the constant

/**
 * CodeIgniter Version
 *
 * @var string
 *
 */
    const CI_VERSION = '3.1.6';

How to run a shell script on a Unix console or Mac terminal?

To start the shell-script 'file.sh':

sh file.sh

bash file.sh

Another option is set executable permission using chmod command:

chmod +x file.sh

Now run .sh file as follows:

./file.sh

Update an outdated branch against master in a Git repo

Update the master branch, which you need to do regardless.

Then, one of:

Rebase the old branch against the master branch. Solve the merge conflicts during rebase, and the result will be an up-to-date branch that merges cleanly against master.
Merge your branch into master, and resolve the merge conflicts.
Merge master into your branch, and resolve the merge conflicts. Then, merging from your branch into master should be clean.

None of these is better than the other, they just have different trade-off patterns.

I would use the rebase approach, which gives cleaner overall results to later readers, in my opinion, but that is nothing aside from personal taste.

To rebase and keep the branch you would:

git checkout <branch> && git rebase <target>

In your case, check out the old branch, then

git rebase master

to get it rebuilt against master.

How to parse XML in Bash?

While it seems like "never parse XML, JSON... from bash without a proper tool" is sound advice, I disagree. If this is side job, it is waistfull to look for the proper tool, then learn it... Awk can do it in minutes. My programs have to work on all above mentioned and more kinds of data. Hell, I do not want to test 30 tools to parse 5-7-10 different formats I need if I can awk the problem in minutes. I do not care about XML, JSON or whatever! I need a single solution for all of them.

As an example: my SmartHome program runs our homes. While doing it, it reads plethora of data in too many different formats I can not control. I never use dedicated, proper tools since I do not want to spend more than minutes on reading the data I need. With FS and RS adjustments, this awk solution works perfectly for any textual format. But, it may not be the proper answer when your primary task is to work primarily with loads of data in that format!

The problem of parsing XML from bash I faced yesterday. Here is how I do it for any hierarchical data format. As a bonus - I assign data directly to the variables in a bash script.

To make thins easier to read, I will present solution in stages. From the OP test data, I created a file: test.xml

Parsing said XML in bash and extracting the data in 90 chars:

awk 'BEGIN { FS="<|>"; RS="\n" }; /host|username|password|dbname/ { print $2, $4 }' test.xml

I normally use more readable version since it is easier to modify in real life as I often need to test differently:

awk 'BEGIN { FS="<|>"; RS="\n" }; { if ($0 ~ /host|username|password|dbname/) print $2,$4}' test.xml

I do not care how is the format called. I seek only the simplest solution. In this particular case, I can see from the data that newline is the record separator (RS) and <> delimit fields (FS). In my original case, I had complicated indexing of 6 values within two records, relating them, find when the data exists plus fields (records) may or may not exist. It took 4 lines of awk to solve the problem perfectly. So, adapt idea to each need before using it!

Second part simply looks it there is wanted string in a line (RS) and if so, prints out needed fields (FS). The above took me about 30 seconds to copy and adapt from the last command I used this way (4 times longer). And that is it! Done in 90 chars.

But, I always need to get the data neatly into variables in my script. I first test the constructs like so:

awk 'BEGIN { FS="<|>"; RS="\n" }; { if ($0 ~ /host|username|password|dbname/) print $2"=\""$4"\"" }' test.xml

In some cases I use printf instead of print. When I see everything looks well, I simply finish assigning values to variables. I know many think "eval" is "evil", no need to comment :) Trick works perfectly on all four of my networks for years. But keep learning if you do not understand why this may be bad practice! Including bash variable assignments and ample spacing, my solution needs 120 chars to do everything.

eval $( awk 'BEGIN { FS="<|>"; RS="\n" }; { if ($0 ~ /host|username|password|dbname/) print $2"=\""$4"\"" }' test.xml ); echo "host: $host, username: $username, password: $password dbname: $dbname"

Making a flex item float right

You can't use float inside flex container and the reason is that float property does not apply to flex-level boxes as you can see here Fiddle.

So if you want to position child element to right of parent element you can use margin-left: auto but now child element will also push other div to the right as you can see here Fiddle.

What you can do now is change order of elements and set order: 2 on child element so it doesn't affect second div

_x000D_

.parent {_x000D_
  display: flex;_x000D_
}_x000D_
.child {_x000D_
  margin-left: auto;_x000D_
  order: 2;_x000D_
}

_x000D_

<div class="parent">_x000D_
  <div class="child">Ignore parent?</div>_x000D_
  <div>another child</div>_x000D_
</div>

_x000D_

How do I convert a IPython Notebook into a Python file via commandline?

Jupytext is nice to have in your toolchain for such conversions. It allows not only conversion from a notebook to a script, but you can go back again from the script to notebook as well. And even have that notebook produced in executed form.

jupytext --to py notebook.ipynb                 # convert notebook.ipynb to a .py file
jupytext --to notebook notebook.py              # convert notebook.py to an .ipynb file with no outputs
jupytext --to notebook --execute notebook.py    # convert notebook.py to an .ipynb file and run it

GCC fatal error: stdio.h: No such file or directory

Mac OS Mojave

The accepted answer no longer works. When running the command xcode-select --install it tells you to use "Software Update" to install updates.

In this link is the updated method:

Open a Terminal and then:

cd /Library/Developer/CommandLineTools/Packages/
open macOS_SDK_headers_for_macOS_10.14.pkg

This will open an installation Wizard.

Update 12/2019

After updating to Mojave 10.15.1 it seems that using xcode-select --install works as intended.

How do I fill arrays in Java?

Check out the Arrays.fill methods.

int[] array = new int[4];
Arrays.fill(array, 0);

How to run mysql command on bash?

This one worked, double quotes when $user and $password are outside single quotes. Single quotes when inside a single quote statement.

mysql --user="$user" --password="$password" --database="$user" --execute='DROP DATABASE '$user'; CREATE DATABASE '$user';'

Microsoft Visual C++ 14.0 is required (Unable to find vcvarsall.bat)

If you have already installed Visual Studio Build Tools (as in other comments), and upgraded setuptools but it still doesn't work:

Make sure to run pip under x86 or x64 Native Tools Command Prompt.

It can be found under VS folder in Windows start menu. The default command line prompt may NOT provide Pip the path to the VS build tool, as is in my case.

Laravel requires the Mcrypt PHP extension

My OS is Yosemite.

I resolve this issue, by finding configuration paths:

php --ini

Example output:

Configuration File (php.ini) Path: /usr/local/etc/php/5.5
Loaded Configuration File:         /usr/local/etc/php/5.5/php.ini
Scan for additional .ini files in: /usr/local/etc/php/5.5/conf.d
Additional .ini files parsed:      (none)

Next steps:

Rename or Delete php55 ini file
Create symlink
Restart Apache server

Commands:

mv /usr/local/etc/php/5.5/php.ini /usr/local/etc/php/5.5/php.ini.default
ln -s /etc/php.ini /usr/local/etc/php/5.5/php.ini
sudo apachectl restart

Then you can check your php modules via:

php -m

How do you open a file in C++?

fstream are great but I will go a little deeper and tell you about RAII.

The problem with a classic example is that you are forced to close the file by yourself, meaning that you will have to bend your architecture to this need. RAII makes use of the automatic destructor call in C++ to close the file for you.

Update: seems that std::fstream already implements RAII so the code below is useless. I'll keep it here for posterity and as an example of RAII.

class FileOpener
{
public:
    FileOpener(std::fstream& file, const char* fileName): m_file(file)
    { 
        m_file.open(fileName); 
    }
    ~FileOpeneer()
    { 
        file.close(); 
    }

private:
    std::fstream& m_file;
};

You can now use this class in your code like this:

int nsize = 10;
char *somedata;
ifstream myfile;
FileOpener opener(myfile, "<path to file>");
myfile.read(somedata,nsize);
// myfile is closed automatically when opener destructor is called

Learning how RAII works can save you some headaches and some major memory management bugs.

Simple PowerShell LastWriteTime compare

I have an example I would like to share

$File = "C:\Foo.txt"
#retrieves the Systems current Date and Time in a DateTime Format
$today = Get-Date
#subtracts 12 hours from the date to ensure the file has been written to recently
$today = $today.AddHours(-12)
#gets the last time the $file was written in a DateTime Format
$lastWriteTime = (Get-Item $File).LastWriteTime

#If $File doesn't exist we will loop indefinetely until it does exist.
# also loops until the $File that exists was written to in the last twelve hours
while((!(Test-Path $File)) -or ($lastWriteTime -lt $today))
{
    #if a file exists then the write time is wrong so update it
    if (Test-Path $File)
    {
        $lastWriteTime = (Get-Item $File).LastWriteTime
    }
    #Sleep for 5 minutes
    $time = Get-Date
    Write-Host "Sleep" $time
    Start-Sleep -s 300;
}

Programs & Examples On #Method modifier

Timeout jQuery effects

http://jsfiddle.net/eNxuJ/78/

How to send email from localhost WAMP Server to send email Gmail Hotmail or so forth?

How can I reconcile detached HEAD with master/origin?

Check if starting characters of a string are alphabetical in T-SQL

ImportError: No module named model_selection

AngularJS : The correct way of binding to a service properties

T-SQL: Selecting rows to delete via joins

Calling stored procedure with return value

CSS3 transform not working

Checkout subdirectories in Git?

Nullable type as a generic parameter possible?

How can I control the speed that bootstrap carousel slides in items?

Getting around the Max String size in a vba function?

Jenkins / Hudson environment variables

apache not accepting incoming connections from outside of localhost

C++ vector of char array

Shortcut for creating single item list in C#

Loop through a comma-separated shell variable

Encoding an image file with base64

How to add color to Github's README.md file

PHP: merge two arrays while keeping keys instead of reindexing?

how to copy only the columns in a DataTable to another DataTable?

How can I drop a table if there is a foreign key constraint in SQL Server?

Using str_replace so that it only acts on the first match?

How to bind multiple values to a single WPF TextBlock?

Python math module

Run bash script as daemon

Print PHP Call Stack

How can I check if a string contains ANY letters from the alphabet?

How to remove single character from a String

delete image from folder PHP

How to create a new file in unix?

How can I see the raw SQL queries Django is running?

Fit website background image to screen size

Class method decorator with self arguments?

implement addClass and removeClass functionality in angular2

What is the difference between List and ArrayList?

How to add an item to a drop down list in ASP.NET?

Single TextView with multiple colored text

How do I install ASP.NET MVC 5 in Visual Studio 2012?

What does the exclamation mark do before the function?

Eclipse fonts and background color

`IF` statement with 3 possible answers each based on 3 different ranges

Disable Proximity Sensor during call

How to rename HTML "browse" button of an input type=file?

Using curl POST with variables defined in bash script functions

Java synchronized method lock on object, or method?

Find distance between two points on map using Google Map API V2

Gradle sync failed: failed to find Build Tools revision 24.0.0 rc1

Search for value in DataGridView in a column

Automatic prune with Git fetch or pull

git config --global fetch.prune true

git config remote.origin.prune true

git config --global gui.pruneDuringFetch true

References

--global

--local

fetch.prune

gui.pruneDuringFetch

remote.<name>.prune

The entity name must immediately follow the '&' in the entity reference

Creating custom function in React component

mysql error 2005 - Unknown MySQL server host 'localhost'(11001)

ROW_NUMBER() in MySQL

How do I get the current absolute URL in Ruby on Rails?

Cast IList to List

Can I force pip to reinstall the current version?

How to change a css class style through Javascript?

Compression/Decompression string with C#

Global keyboard capture in C# application

How do I fix a merge conflict due to removal of a file in a branch?

restrict edittext to single line

What difference does .AsNoTracking() make?

How to remove decimal part from a number in C#

Uncaught SyntaxError: Block-scoped declarations (let, const, function, class) not yet supported outside strict mode

Setting custom UITableViewCells height

How do I handle the window close event in Tkinter?

ViewDidAppear is not called when opening app from background

`git config --global fetch.prune true`

`git config remote.origin.prune true`

`git config --global gui.pruneDuringFetch true`

`--global`

`--local`

`fetch.prune`

`gui.pruneDuringFetch`

`remote.<name>.prune`