How to dynamically change the color of the selected menu item of a web page?

Set the styles for class active and hover:

Than you need to make the li active, on the server side. So when you are drawing the menu, you should know which page is loaded and set it to:

 <li class="active">Question</li>
 <li>Tags</li>
 <li>Users</li>

But if you are changing the content without reloading, you cannot change set the active li element on the server, you need to use javascript:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.5.2/jquery.min.js"></script>
<style>
  .menu{width: 300px; height: 25; font-size: 18px;}
  .menu li{list-style: none; float: left; margin-right: 4px; padding: 5px;}
  .menu li:hover, .menu li.active {
        background-color: #f90;
    }
</style>
</head>
<body>

<ul class="menu">
<li>Item 1</li>
<li class="active">Item 2</li>
<li>Item 3</li>
<li>Item 4</li>
<li>Item 5</li>
<li>Item 6</li>
</ul>

<script type="text/javascript">

var make_button_active = function()
{
  //Get item siblings
  var siblings =($(this).siblings());

  //Remove active class on all buttons
  siblings.each(function (index)
    {
      $(this).removeClass('active');
    }
  )


  //Add the clicked button class
  $(this).addClass('active');
}

//Attach events to menu
$(document).ready(
  function()
  {
    $(".menu li").click(make_button_active);
  }  
)

</script>
</body>

</html>

Docker - Container is not running

In my case , i changed certain file names and directory names of the parent directory of the Dockerfile . Due to which container not finding the required parameters to start it again.

After renaming it back to the original names, container started like butter.

HttpServletRequest - how to obtain the referring URL?

As all have mentioned it is

request.getHeader("referer");

I would like to add some more details about security aspect of referer header in contrast with accepted answer. In Open Web Application Security Project(OWASP) cheat sheets, under Cross-Site Request Forgery (CSRF) Prevention Cheat Sheet it mentions about importance of referer header.

More importantly for this recommended Same Origin check, a number of HTTP request headers can't be set by JavaScript because they are on the 'forbidden' headers list. Only the browsers themselves can set values for these headers, making them more trustworthy because not even an XSS vulnerability can be used to modify them.

The Source Origin check recommended here relies on three of these protected headers: Origin, Referer, and Host, making it a pretty strong CSRF defense all on its own.

You can refer Forbidden header list here. User agent(ie:browser) has the full control over these headers not the user.

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

Don't use jquery...use plain javascript

var a = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15];

var b = a.splice(0,10);

//a is now [11,12,13,14,15];
//b is now [1,2,3,4,5,6,7,8,9,10];

You could loop this to get the behavior you want.

var a = YOUR_ARRAY;
while(a.length) {
    console.log(a.splice(0,10));
}

This would give you 10 elements at a time...if you have say 15 elements, you would get 1-10, the 11-15 as you wanted.

How do I add images in laravel view?

<img src="/images/yourfile.png">

Store your files in public/images directory.

Shell script "for" loop syntax

Use:

max=10
for i in `eval echo {2..$max}`
do
    echo $i
done

You need the explicit 'eval' call to reevaluate the {} after variable substitution.

how to set textbox value in jquery

I think you want to set the response of the call to the URL 'compz.php?prodid=' + x + '&qbuys=' + y as value of the textbox right? If so, you have to do something like:

$.get('compz.php?prodid=' + x + '&qbuys=' + y, function(data) {
    $('#subtotal').val(data);
});

Reference: get()

You have two errors in your code:

load() puts the HTML returned from the Ajax into the specified element:

Load data from the server and place the returned HTML into the matched element.

You cannot set the value of a textbox with that method.
$(selector).load() returns the a jQuery object. By default an object is converted to [object Object] when treated as string.

Further clarification:

Assuming your URL returns 5.

If your HTML looks like:

<div id="foo"></div>

then the result of

$('#foo').load('/your/url');

will be

<div id="foo">5</div>

But in your code, you have an input element. Theoretically (it is not valid HTML and does not work as you noticed), an equivalent call would result in

<input id="foo">5</input>

But you actually need

<input id="foo" value="5" />

Therefore, you cannot use load(). You have to use another method, get the response and set it as value yourself.

PostgreSQL psql terminal command

psql --pset=format=FORMAT

Great for executing queries from command line, e.g.

psql --pset=format=unaligned -c "select bandanavalue from bandana where bandanakey = 'atlassian.confluence.settings';"

mysql count group by having

Maybe

SELECT count(*) FROM (
    SELECT COUNT(*) FROM Movies GROUP BY ID HAVING count(Genre) = 4
) AS the_count_total

although that would not be the sum of all the movies, just how many have 4 genre's.

So maybe you want

SELECT sum(
    SELECT COUNT(*) FROM Movies GROUP BY ID having Count(Genre) = 4
) as the_sum_total

How to stop/kill a query in postgresql?

What I did is first check what are the running processes by

SELECT * FROM pg_stat_activity WHERE state = 'active';

Find the process you want to kill, then type:

SELECT pg_cancel_backend(<pid of the process>)

This basically "starts" a request to terminate gracefully, which may be satisfied after some time, though the query comes back immediately.

If the process cannot be killed, try:

SELECT pg_terminate_backend(<pid of the process>)

jquery - fastest way to remove all rows from a very large table

You could try this...

var myTable= document.getElementById("myTable");
if(myTable== null)
    return;
var oTBody = myTable.getElementsByTagName("TBODY")[0];
if(oTBody== null)
    return;
try
{
    oTBody.innerHTML = "";
}
catch(e)
{
    for(var i=0, j=myTable.rows.length; i<j; i++)
        myTable.deleteRow(0);
}

How to check if array element is null to avoid NullPointerException in Java

The example code does not throw an NPE. (there also should not be a ';' behind the i++)

CodeIgniter Select Query

Thats quite simple. For example, here is a random code of mine:

function news_get_by_id ( $news_id )
{

    $this->db->select('*');
    $this->db->select("DATE_FORMAT( date, '%d.%m.%Y' ) as date_human",  FALSE );
    $this->db->select("DATE_FORMAT( date, '%H:%i') as time_human",      FALSE );


    $this->db->from('news');

    $this->db->where('news_id', $news_id );


    $query = $this->db->get();

    if ( $query->num_rows() > 0 )
    {
        $row = $query->row_array();
        return $row;
    }

}

This will return the "row" you selected as an array so you can access it like:

$array = news_get_by_id ( 1 );
echo $array['date_human'];

I also would strongly advise, not to chain the query like you do. Always have them separately like in my code, which is clearly a lot easier to read.

Please also note that if you specify the table name in from(), you call the get() function without a parameter.

If you did not understand, feel free to ask :)

How to position absolute inside a div?

The absolute divs are taken out of the flow of the document so the containing div does not have any content except for the padding. Give #box a height to fill it out.

#box {
    background-color: #000;
    position: relative;
    padding: 10px;
    width: 220px;
    height:30px;
}

Using grep and sed to find and replace a string

I have taken Vlad's idea and changed it a little bit. Instead of

grep -rl oldstr path | xargs sed -i 's/oldstr/newstr/g' /dev/null

Which yields

sed: couldn't edit /dev/null: not a regular file

I'm doing in 3 different connections to the remote server

touch deleteme
grep -rl oldstr path | xargs sed -i 's/oldstr/newstr/g' ./deleteme
rm deleteme

Although this is less elegant and requires 2 more connections to the server (maybe there's a way to do it all in one line) it does the job efficiently as well

Optional Parameters in Web Api Attribute Routing

Converting my comment into an answer to complement @Kiran Chala's answer as it seems helpful for the audiences-

When we mark a parameter as optional in the action uri using ? character then we must provide default values to the parameters in the method signature as shown below:

MyMethod(string name = "someDefaultValue", int? Id = null)

Reading a column from CSV file using JAVA

Read the input continuously within the loop so that the variable line is assigned a value other than the initial value

while ((line = br.readLine()) !=null) {
  ...
}

Aside: This problem has already been solved using CSV libraries such as OpenCSV. Here are examples for reading and writing CSV files

this in equals method

this refers to the current instance of the class (object) your equals-method belongs to. When you test this against an object, the testing method (which is equals(Object obj) in your case) will check wether or not the object is equal to the current instance (referred to as this).

An example:

Object obj = this; this.equals(obj); //true   Object obj = this; new Object().equals(obj); //false

How to do a SOAP wsdl web services call from the command line

Here is another sample CURL - SOAP (WSDL) request for bank swift codes

Request

curl -X POST http://www.thomas-bayer.com/axis2/services/BLZService \
  -H 'Content-Type: text/xml' \
  -H 'SOAPAction: blz:getBank' \
  -d '
  <soapenv:Envelope 
    xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" 
    xmlns:blz="http://thomas-bayer.com/blz/">
    <soapenv:Header/>
    <soapenv:Body>
      <blz:getBank>
        <blz:blz>10020200</blz:blz>
      </blz:getBank>
    </soapenv:Body>
  </soapenv:Envelope>'

Response

< HTTP/1.1 200 OK
< Server: Apache-Coyote/1.1
< Content-Type: text/xml;charset=UTF-8
< Date: Tue, 26 Mar 2019 08:14:59 GMT
< Content-Length: 395
< 
<?xml version='1.0' encoding='UTF-8'?>
<soapenv:Envelope
  xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
  <soapenv:Body>
    <ns1:getBankResponse
      xmlns:ns1="http://thomas-bayer.com/blz/">
      <ns1:details>
        <ns1:bezeichnung>BHF-BANK</ns1:bezeichnung>
        <ns1:bic>BHFBDEFF100</ns1:bic>
        <ns1:ort>Berlin</ns1:ort>
        <ns1:plz>10117</ns1:plz>
      </ns1:details>
    </ns1:getBankResponse>
  </soapenv:Body>
</soapenv:Envelope>

svn: E155004: ..(path of resource).. is already locked

We had the same problem and we solved it as follows : we tried a "revert from SVN" from another folder than the one we faced the issue, and suddenly we were able to perform commit,revert etc from the folder that had the issue. It seems that it firstly needs to commit a change from another dir.

I can't find my git.exe file in my Github folder

1) Install Git for Windows from here: http://git-scm.com/download/win

2) Note: During installation, Make sure "Use Git and optional Unix tools from the windows command prompt" is selected

3) restart the Android Studio and try again

4) Go to File-> New -> Project from version control -> Git

Resetting remote to a certain commit

Use the other answers if you don't mind losing local changes. This method can still wreck your remote if you choose the wrong commit hash to go back to.

If you just want to make the remote match a commit that's anywhere in your local repo:

Do not do any resetting.
Use git log to find the commit you want to the remote to be at. git log -p to see changes, or git log --graph --all --oneline --decorate to see a compact tree.
Copy the commit's hash or its tag, or the name of its branch if it's the tip.

Run a command like:

git push --force <remote> <commit-ish>:<the remote branch>

e.g.

git push --force origin 606fdfaa33af1844c86f4267a136d4666e576cdc:master

git push --force staging v2.4.0b2:releases

I use convenient alias (git go) for viewing history as in step 2, which can be added like so:

    git config --global alias.go 'log --graph --all --decorate --oneline'`

How to do SVN Update on my project using the command line

svn update /path/to/working/copy

If subversion is not in your PATH, then of course

/path/to/subversion/svn update /path/to/working/copy

or if you are in the current root directory of your svn repo (it contains a .svn subfolder), it's as simple as

svn update

Why does range(start, end) not include end?

The length of the range is the top value minus the bottom value.

It's very similar to something like:

for (var i = 1; i < 11; i++) {
    //i goes from 1 to 10 in here
}

in a C-style language.

Also like Ruby's range:

1...11 #this is a range from 1 to 10

However, Ruby recognises that many times you'll want to include the terminal value and offers the alternative syntax:

1..10 #this is also a range from 1 to 10

Update Tkinter Label from variable

Maybe I'm not understanding the question but here is my simple solution that works -

# I want to Display total heads bent this machine so I define a label -
TotalHeadsLabel3 = Label(leftFrame)
TotalHeadsLabel3.config(font=Helv12,fg='blue',text="Total heads " + str(TotalHeads))
TotalHeadsLabel3.pack(side=TOP)

# I update the int variable adding the quantity bent -
TotalHeads = TotalHeads + headQtyBent # update ready to write to file & display
TotalHeadsLabel3.config(text="Total Heads "+str(TotalHeads)) # update label with new qty

I agree that labels are not automatically updated but can easily be updated with the

<label name>.config(text="<new text>" + str(<variable name>))

That just needs to be included in your code after the variable is updated.

How do you add input from user into list in Python

shopList = [] 
maxLengthList = 6
while len(shopList) < maxLengthList:
    item = input("Enter your Item to the List: ")
    shopList.append(item)
    print shopList
print "That's your Shopping List"
print shopList

How to copy file from one location to another location?

  public static void copyFile(File oldLocation, File newLocation) throws IOException {
        if ( oldLocation.exists( )) {
            BufferedInputStream  reader = new BufferedInputStream( new FileInputStream(oldLocation) );
            BufferedOutputStream  writer = new BufferedOutputStream( new FileOutputStream(newLocation, false));
            try {
                byte[]  buff = new byte[8192];
                int numChars;
                while ( (numChars = reader.read(  buff, 0, buff.length ) ) != -1) {
                    writer.write( buff, 0, numChars );
                }
            } catch( IOException ex ) {
                throw new IOException("IOException when transferring " + oldLocation.getPath() + " to " + newLocation.getPath());
            } finally {
                try {
                    if ( reader != null ){                      
                        writer.close();
                        reader.close();
                    }
                } catch( IOException ex ){
                    Log.e(TAG, "Error closing files when transferring " + oldLocation.getPath() + " to " + newLocation.getPath() ); 
                }
            }
        } else {
            throw new IOException("Old location does not exist when transferring " + oldLocation.getPath() + " to " + newLocation.getPath() );
        }
    }

Have bash script answer interactive prompts

In my situation I needed to answer some questions without Y or N but with text or blank. I found the best way to do this in my situation was to create a shellscript file. In my case I called it autocomplete.sh

I was needing to answer some questions for a doctrine schema exporter so my file looked like this.

-- This is an example only --

php vendor/bin/mysql-workbench-schema-export mysqlworkbenchfile.mwb ./doctrine << EOF
`#Export to Doctrine Annotation Format`                                     1
`#Would you like to change the setup configuration before exporting`        y
`#Log to console`                                                           y
`#Log file`                                                                 testing.log
`#Filename [%entity%.%extension%]`
`#Indentation [4]`
`#Use tabs [no]`
`#Eol delimeter (win, unix) [win]`
`#Backup existing file [yes]`
`#Add generator info as comment [yes]`
`#Skip plural name checking [no]`
`#Use logged storage [no]`
`#Sort tables and views [yes]`
`#Export only table categorized []`
`#Enhance many to many detection [yes]`
`#Skip many to many tables [yes]`
`#Bundle namespace []`
`#Entity namespace []`
`#Repository namespace []`
`#Use automatic repository [yes]`
`#Skip column with relation [no]`
`#Related var name format [%name%%related%]`
`#Nullable attribute (auto, always) [auto]`
`#Generated value strategy (auto, identity, sequence, table, none) [auto]`
`#Default cascade (persist, remove, detach, merge, all, refresh, ) [no]`
`#Use annotation prefix [ORM\]`
`#Skip getter and setter [no]`
`#Generate entity serialization [yes]`
`#Generate extendable entity [no]`                                          y
`#Quote identifier strategy (auto, always, none) [auto]`
`#Extends class []`
`#Property typehint [no]`
EOF

The thing I like about this strategy is you can comment what your answers are and using EOF a blank line is just that (the default answer). Turns out by the way this exporter tool has its own JSON counterpart for answering these questions, but I figured that out after I did this =).

to run the script simply be in the directory you want and run 'sh autocomplete.sh' in terminal.

In short by using << EOL & EOF in combination with Return Lines you can answer each question of the prompt as necessary. Each new line is a new answer.

My example just shows how this can be done with comments also using the ` character so you remember what each step is.

Note the other advantage of this method is you can answer with more then just Y or N ... in fact you can answer with blanks!

Hope this helps someone out.

parseInt with jQuery

var test = parseInt($("#testid").val(), 10);

You have to tell it you want the value of the input you are targeting.

And also, always provide the second argument (radix) to parseInt. It tries to be too clever and autodetect it if not provided and can lead to unexpected results.

Providing 10 assumes you are wanting a base 10 number.

CALL command vs. START with /WAIT option

I think that they should perform generally the same, but there are some differences. START is generally used to start applications or to start the default application for a given file type. That way if you START http://mywebsite.com it doesn't do START iexplore.exe http://mywebsite.com.

START myworddoc.docx would start Microsoft Word and open myworddoc.docx.CALL myworddoc.docx does the same thing... however START provides more options for the window state and things of that nature. It also allows process priority and affinity to be set.

In short, given the additional options provided by start, it should be your tool of choice.

START ["title"] [/D path] [/I] [/MIN] [/MAX] [/SEPARATE | /SHARED]
  [/LOW | /NORMAL | /HIGH | /REALTIME | /ABOVENORMAL | /BELOWNORMAL]
  [/NODE <NUMA node>] [/AFFINITY <hex affinity mask>] [/WAIT] [/B]
  [command/program] [parameters]

"title"     Title to display in window title bar.
path        Starting directory.
B           Start application without creating a new window. The
            application has ^C handling ignored. Unless the application
            enables ^C processing, ^Break is the only way to interrupt
            the application.
I           The new environment will be the original environment passed
            to the cmd.exe and not the current environment.
MIN         Start window minimized.
MAX         Start window maximized.
SEPARATE    Start 16-bit Windows program in separate memory space.
SHARED      Start 16-bit Windows program in shared memory space.
LOW         Start application in the IDLE priority class.
NORMAL      Start application in the NORMAL priority class.
HIGH        Start application in the HIGH priority class.
REALTIME    Start application in the REALTIME priority class.
ABOVENORMAL Start application in the ABOVENORMAL priority class.
BELOWNORMAL Start application in the BELOWNORMAL priority class.
NODE        Specifies the preferred Non-Uniform Memory Architecture (NUMA)
            node as a decimal integer.
AFFINITY    Specifies the processor affinity mask as a hexadecimal number.
            The process is restricted to running on these processors.

            The affinity mask is interpreted differently when /AFFINITY and
            /NODE are combined.  Specify the affinity mask as if the NUMA
            node's processor mask is right shifted to begin at bit zero.
            The process is restricted to running on those processors in
            common between the specified affinity mask and the NUMA node.
            If no processors are in common, the process is restricted to
            running on the specified NUMA node.
WAIT        Start application and wait for it to terminate.

Get current domain

$_SERVER['HTTP_HOST']

//to get the domain

$protocol=strpos(strtolower($_SERVER['SERVER_PROTOCOL']),'https') === FALSE ? 'http' : 'https';
$domainLink=$protocol.'://'.$_SERVER['HTTP_HOST'];

//domain with protocol

$url=$protocol.'://'.$_SERVER['HTTP_HOST'].'?'.$_SERVER['QUERY_STRING'];

//protocol,domain,queryString total **As the $_SERVER['SERVER_NAME'] is not reliable for multi domain hosting!

How do I prevent CSS inheritance?

You could use something like jQuery to "disable" this behaviour, though I hardly think it's a good solution as you get display logic in css & javascript. Still, depending upon your requirements you might find jQuery's css utils make life easier for you than trying hacky css, especially if you're trying to make it work for IE6

How to execute raw queries with Laravel 5.1?

you can run raw query like this way too.

DB::table('setting_colleges')->first();

Show only two digit after decimal

Use DecimalFormat.

DecimalFormat is a concrete subclass of NumberFormat that formats decimal numbers. It has a variety of features designed to make it possible to parse and format numbers in any locale, including support for Western, Arabic, and Indic digits. It also supports different kinds of numbers, including integers (123), fixed-point numbers (123.4), scientific notation (1.23E4), percentages (12%), and currency amounts ($123). All of these can be localized.

Code snippet -

double i2=i/60000;
tv.setText(new DecimalFormat("##.##").format(i2));

Output -

5.81

Java substring: 'string index out of range'

I'm assuming your column is 38 characters in length, so you want to truncate itemdescription to fit within the database. A utility function like the following should do what you want:

/**
 * Truncates s to fit within len. If s is null, null is returned.
 **/
public String truncate(String s, int len) { 
  if (s == null) return null;
  return s.substring(0, Math.min(len, s.length()));
}

then you just call it like so:

String value = "_";
if (itemdescription != null && itemdescription.length() > 0) {
  value = truncate(itemdescription, 38);
}

pstmt2.setString(3, value);

How do I conditionally apply CSS styles in AngularJS?

I have found problems when applying classes inside table elements when I had one class already applied to the whole table (for example, a color applied to the odd rows <myClass tbody tr:nth-child(even) td>). It seems that when you inspect the element with Developer Tools, the element.style has no style assigned. So instead of using ng-class, I have tried using ng-style, and in this case, the new CSS attribute does appear inside element.style. This code works great for me:

<tr ng-repeat="element in collection">

    [...amazing code...]

    <td ng-style="myvar === 0 && {'background-color': 'red'} ||
                  myvar === 1 && {'background-color': 'green'} ||
                  myvar === 2 && {'background-color': 'yellow'}">{{ myvar }}</td>

    [...more amazing code...]

</tr>

Myvar is what I am evaluating, and in each case I apply a style to each <td> depending on myvar value, that overwrites the current style applied by the CSS class for the whole table.

UPDATE

If you want to apply a class to the table for example, when visiting a page or in other cases, you can use this structure:

<li ng-class="{ active: isActive('/route_a') || isActive('/route_b')}">

Basically, what we need to activate a ng-class is the class to apply and a true or false statement. True applies the class and false doesn't. So here we have two checks of the route of the page and an OR between them, so if we are in /route_a OR we are in route_b, the active class will be applied.

This works just having a logic function on the right that returns true or false.

So in the first example, ng-style is conditioned by three statements. If all of them are false, no style is applied, but following our logic, at least one is going to be applied, so, the logic expression will check which variable comparison is true and because a non empty array is always true, that will left an array as return and with only one true, considering we are using OR for the whole response, the style remaining will be applied.

By the way, I forgot to give you the function isActive():

$rootScope.isActive = function(viewLocation) {
    return viewLocation === $location.path();
};

NEW UPDATE

Here you have something I find really useful. When you need to apply a class depending on the value of a variable, for example, an icon depending on the contents of the div, you can use the following code (very useful in ng-repeat):

<i class="fa" ng-class="{ 'fa-github'   : type === 0,
                          'fa-linkedin' : type === 1,
                          'fa-skype'    : type === 2,
                          'fa-google'   : type === 3 }"></i>

Icons from Font Awesome

Turn Pandas Multi-Index into column

The reset_index() is a pandas DataFrame method that will transfer index values into the DataFrame as columns. The default setting for the parameter is drop=False (which will keep the index values as columns).

All you have to do add .reset_index(inplace=True) after the name of the DataFrame:

df.reset_index(inplace=True)

How do I check if an index exists on a table field in MySQL?

SHOW KEYS FROM  tablename WHERE Key_name='unique key name'

you can find if there exists an unique key in the table

React - Display loading screen while DOM is rendering?

If anyone looking for a drop-in, zero-config and zero-dependencies library for the above use-case, try pace.js (http://github.hubspot.com/pace/docs/welcome/).

It automatically hooks to events (ajax, readyState, history pushstate, js event loop etc) and show a customizable loader.

Worked well with our react/relay projects (handles navigation changes using react-router, relay requests) (Not affliated; had used pace.js for our projects and it worked great)

How to include multiple js files using jQuery $.getScript() method

What you are looking for is an AMD compliant loader (like require.js).

http://requirejs.org/

http://requirejs.org/docs/whyamd.html

There are many good open source ones if you look it up. Basically this allows you to define a module of code, and if it is dependent on other modules of code, it will wait until those modules have finished downloading before proceeding to run. This way you can load 10 modules asynchronously and there should be no problems even if one depends on a few of the others to run.

SCP Permission denied (publickey). on EC2 only when using -r flag on directories

I was initially running:

sudo scp

Once I ran just scp, without sudo, it copied everything fine:

scp

It seems to me that sudo scp command wasn't reading my current user's SSH public key at ~/.ssh/id_rsa.pub.

No assembly found containing an OwinStartupAttribute Error

just paste this code <add key="owin:AutomaticAppStartup" value="false" /> in Web.config Not In web.config there is two webconfig so be sure that it will been paste in Web.Config

How to solve java.lang.NoClassDefFoundError?

In my environment, I encounter this issue in unit test. After appending one library dependency to *.pom, that's fixed.

e.g.:

error message:

java.lang.NoClassDefFoundError: com/abc/def/foo/xyz/Iottt

pom:

<dependency>
    <groupId>com.abc.def</groupId>
    <artifactId>foo</artifactId>
    <scope>test</scope>
</dependency>

Setting PHP tmp dir - PHP upload not working

I struggled with this issue for a long time... My solution was to modify the php.ini file, in the folder that contained the php script. This was important, as modifying the php.ini at the root did not resolve the problem (I have a php.ini in each folder for granular control). The relevant entries in my php.ini looked like this.... (the output_buffering is not likely needed for this issue)

output_buffering = On 
upload_max_filesize = 20M 
post_max_size = 21M

Save the plots into a PDF

Never mind got the way to do it.

def plotGraph(X,Y):
     fignum = random.randint(0,sys.maxint)
     fig = plt.figure(fignum)
     ### Plotting arrangements ###
     return fig

------ plotting module ------

----- mainModule ----

 import matplotlib.pyplot as plt
 ### tempDLStats, tempDLlabels are the argument
 plot1 = plotGraph(tempDLstats, tempDLlabels)
 plot2 = plotGraph(tempDLstats_1, tempDLlabels_1)
 plot3 = plotGraph(tempDLstats_2, tempDLlabels_2)
 plt.show()
 plot1.savefig('plot1.png')
 plot2.savefig('plot2.png')
 plot3.savefig('plot3.png')

----- mainModule -----

xlrd.biffh.XLRDError: Excel xlsx file; not supported

As noted in the release email, linked to from the release tweet and noted in large orange warning that appears on the front page of the documentation, and less orange, but still present, in the readme on the repository and the release on pypi:

xlrd has explicitly removed support for anything other than xls files.

In your case, the solution is to:

make sure you are on a recent version of Pandas, at least 1.0.1, and preferably the latest release. 1.2 will make his even clearer.
install openpyxl: https://openpyxl.readthedocs.io/en/stable/

change your Pandas code to be:

df1 = pd.read_excel(
     os.path.join(APP_PATH, "Data", "aug_latest.xlsm"),
     engine='openpyxl',
)

bootstrap datepicker change date event doesnt fire up when manually editing dates or clearing date

I was using AngularJS and AngularStrap 2.3.7 and trying to catch the 'change' event by listening to a <form> element (not the input itself) and none of the answers here worked for me. I tried to do:

$(form).on('change change.dp dp.change changeDate' function () {...})

And nothing would fire. I ended up listening to the focus and blur events and setting a custom property before/after on the element itself:

// special hack to make bs-datepickers fire change events
// use timeout to make sure they all exist first
$timeout(function () {  
    $('input[bs-datepicker]').on('focus', function (e){
        e.currentTarget.focusValue = e.currentTarget.value;
    });        
    $('input[bs-datepicker]').on('blur', function (e){
        if (e.currentTarget.focusValue !== e.currentTarget.value) {
            var event = new Event('change', { bubbles: true });
            e.currentTarget.dispatchEvent(event);
        }
    });
})

This basically manually checks the value before and after the focus and blur and dispatches a new 'change' event. The { bubbles: true } bit is what got the form to detect the change. If you have any datepicker elements inside of an ng-if you'll need to wrap the listeners in a $timeout to make sure the digest happens first so all of your datepicker elements exist.

Hope this helps someone!

How can I force WebKit to redraw/repaint to propagate style changes?

I found that just adding a content style to the element forced it to repaint, this should be a different value every time you want it to redraw and doesn't need to be on a pseudo element.

.selector {
    content: '1'
}

How to get PID by process name?

you can also use pgrep, in prgep you can also give pattern for match

import subprocess
child = subprocess.Popen(['pgrep','program_name'], stdout=subprocess.PIPE, shell=True)
result = child.communicate()[0]

you can also use awk with ps like this

ps aux | awk '/name/{print $2}'

How do I convert csv file to rdd

I would suggest you to try

https://spark.apache.org/docs/latest/sql-programming-guide.html#rdds

JavaRDD<Person> people = sc.textFile("examples/src/main/resources/people.txt").map(
  new Function<String, Person>() {
    public Person call(String line) throws Exception {
      String[] parts = line.split(",");

      Person person = new Person();
      person.setName(parts[0]);
      person.setAge(Integer.parseInt(parts[1].trim()));

      return person;
    }
  });

You have to have a class in this example person with the spec of your file header and associate your data to the schema and apply criteria like in mysql.. to get desired result

Create a List of primitive int?

Is there a way to convert an Integer[] array to an int[] array?

This gross omission from the Java core libraries seems to come up on pretty much every project I ever work on. And as convenient as the Trove library might be, I am unable to parse the precise requirements to meet LPGL for an Android app that statically links an LGPL library (preamble says ok, body does not seem to say the same). And it's just plain inconvenient to go rip-and-stripping Apache sources to get these classes. There has to be a better way.

What is the proper declaration of main in C++?

The two valid mains are int main() and int main(int, char*[]). Any thing else may or may not compile. If main doesn't explicitly return a value, 0 is implicitly returned.

How to convert this var string to URL in Swift

To Convert file path in String to NSURL, observe the following code

var filePathUrl = NSURL.fileURLWithPath(path)

How to set zoom level in google map

Your code below is zooming the map to fit the specified bounds:

addMarker(27.703402,85.311668,'New Road');
center = bounds.getCenter();
map.fitBounds(bounds);

If you only have 1 marker and add it to the bounds, that results in the closest zoom possible:

function addMarker(lat, lng, info) {
  var pt = new google.maps.LatLng(lat, lng);
  bounds.extend(pt);
}

If you keep track of the number of markers you have "added" to the map (or extended the bounds with), you can only call fitBounds if that number is greater than one. I usually push the markers into an array (for later use) and test the length of that array.

If you will only ever have one marker, don't use fitBounds. Call setCenter, setZoom with the marker position and your desired zoom level.

function addMarker(lat, lng, info) {
  var pt = new google.maps.LatLng(lat, lng);
  map.setCenter(pt);
  map.setZoom(your desired zoom);
}

_x000D_

html,
body,
#map {
  height: 100%;
  width: 100%;
  padding: 0;
  margin: 0;
}

_x000D_

<html>

<head>
  <script src="http://maps.google.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk" type="text/javascript"></script>
  <script type="text/javascript">
    var icon = new google.maps.MarkerImage("http://maps.google.com/mapfiles/ms/micons/blue.png", new google.maps.Size(32, 32), new google.maps.Point(0, 0), new google.maps.Point(16, 32));
    var center = null;
    var map = null;
    var currentPopup;
    var bounds = new google.maps.LatLngBounds();

    function addMarker(lat, lng, info) {
      var pt = new google.maps.LatLng(lat, lng);
      map.setCenter(pt);
      map.setZoom(5);
      var marker = new google.maps.Marker({
        position: pt,
        icon: icon,
        map: map
      });
      var popup = new google.maps.InfoWindow({
        content: info,
        maxWidth: 300
      });
      google.maps.event.addListener(marker, "click", function() {
        if (currentPopup != null) {
          currentPopup.close();
          currentPopup = null;
        }
        popup.open(map, marker);
        currentPopup = popup;
      });
      google.maps.event.addListener(popup, "closeclick", function() {
        map.panTo(center);
        currentPopup = null;
      });
    }

    function initMap() {
      map = new google.maps.Map(document.getElementById("map"), {
        center: new google.maps.LatLng(0, 0),
        zoom: 1,
        mapTypeId: google.maps.MapTypeId.ROADMAP,
        mapTypeControl: false,
        mapTypeControlOptions: {
          style: google.maps.MapTypeControlStyle.HORIZONTAL_BAR
        },
        navigationControl: true,
        navigationControlOptions: {
          style: google.maps.NavigationControlStyle.SMALL
        }
      });
      addMarker(27.703402, 85.311668, 'New Road');
      // center = bounds.getCenter();
      // map.fitBounds(bounds);

    }
  </script>
</head>

<body onload="initMap()" style="margin:0px; border:0px; padding:0px;">
  <div id="map"></div>
</body>

</html>

_x000D_

Git - Ignore node_modules folder everywhere

just add different .gitignore files to mini project 1 and mini project 2. Each of the .gitignore files should /node_modules and you're good to go.

flutter run: No connected devices

For window user,

Set environment variable of Flutter SDK(...\flutter_windows_v0.2.8-beta.zip\flutter\bin)

No device connect

For more information, you can check here http://www.developerlibs.com/2018/05/flutter-introduction-and-setup.html

Here is the info from the mentioned page: Add Flutter to Windows Environment variable Path

Navigate in to Flutter SDK folder.
Go inside to bin folder and copy the directory path (in your case C:\Flutter\bin)
Go to “Control Panel > User Accounts > User Accounts > Change my environment variables”
Under “User variables” select path variable and click edit.
Put C:\Flutter\bin and apply.

Same as Flutter Environment, we have to set the Android SDK path if it is on custom location.

Navigate into the Android SDK folder.
Copy the directory path (in your case ..AndroidStudioSDK\sdk)
Go to “Control Panel > User Accounts > User Accounts > Change my environment variables”
Under “User variables” select path variable and click edit.
Put ..AndroidStudioSDK\sdk with ANDROID_HOME and apply.

Tips:

If you facing the following issue,

1.[?] Android toolchain - develop for Android devices ? Unable to locate Android SDK. Install Android Studio from https://developer.android.com/studio/index.html On the first launch, it will assist you in installing the Android SDK components. (or visit https://flutter.io/setup/#android-setup for detailed instructions).

If Android SDK has been installed to a custom location, set $ANDROID_HOME to that location.

You can resolve it with the following command.

flutter config --android-sdk <android-sdk-location> OR flutter config --android-sdk "android-sdk-location"

Error: Unknown argument --licenses

You can resolve it with Following Command.

flutter -v doctor --android-licenses

Now, Pick the emulator you want to use and click the green arrow to run the project. So, here default screen that is already designed.

Correct way to use Modernizr to detect IE?

Modernizr doesn't detect browsers as such, it detects which feature and capability are present and this is the whole jist of what it's trying to do.

You could try hooking in a simple detection script like this and then using it to make your choice. I've included Version Detection as well just in case that's needed. If you only want to check of any version of IE you could just look for the navigator.userAgent having a value of "MSIE".

_x000D_

var BrowserDetect = {_x000D_
        init: function () {_x000D_
            this.browser = this.searchString(this.dataBrowser) || "Other";_x000D_
            this.version = this.searchVersion(navigator.userAgent) || this.searchVersion(navigator.appVersion) || "Unknown";_x000D_
        },_x000D_
        searchString: function (data) {_x000D_
            for (var i = 0; i < data.length; i++) {_x000D_
                var dataString = data[i].string;_x000D_
                this.versionSearchString = data[i].subString;_x000D_
_x000D_
                if (dataString.indexOf(data[i].subString) !== -1) {_x000D_
                    return data[i].identity;_x000D_
                }_x000D_
            }_x000D_
        },_x000D_
        searchVersion: function (dataString) {_x000D_
            var index = dataString.indexOf(this.versionSearchString);_x000D_
            if (index === -1) {_x000D_
                return;_x000D_
            }_x000D_
_x000D_
            var rv = dataString.indexOf("rv:");_x000D_
            if (this.versionSearchString === "Trident" && rv !== -1) {_x000D_
                return parseFloat(dataString.substring(rv + 3));_x000D_
            } else {_x000D_
                return parseFloat(dataString.substring(index + this.versionSearchString.length + 1));_x000D_
            }_x000D_
        },_x000D_
_x000D_
        dataBrowser: [_x000D_
            {string: navigator.userAgent, subString: "Edge", identity: "MS Edge"},_x000D_
            {string: navigator.userAgent, subString: "MSIE", identity: "Explorer"},_x000D_
            {string: navigator.userAgent, subString: "Trident", identity: "Explorer"},_x000D_
            {string: navigator.userAgent, subString: "Firefox", identity: "Firefox"},_x000D_
            {string: navigator.userAgent, subString: "Opera", identity: "Opera"},  _x000D_
            {string: navigator.userAgent, subString: "OPR", identity: "Opera"},  _x000D_
_x000D_
            {string: navigator.userAgent, subString: "Chrome", identity: "Chrome"}, _x000D_
            {string: navigator.userAgent, subString: "Safari", identity: "Safari"}       _x000D_
        ]_x000D_
    };_x000D_
    _x000D_
    BrowserDetect.init();_x000D_
    document.write("You are using <b>" + BrowserDetect.browser + "</b> with version <b>" + BrowserDetect.version + "</b>");

_x000D_

You can then simply check for:

BrowserDetect.browser == 'Explorer';
BrowserDetect.version <= 9;

What is the purpose of the single underscore "_" variable in Python?

It's just a variable name, and it's conventional in python to use _ for throwaway variables. It just indicates that the loop variable isn't actually used.

Spring Boot how to hide passwords in properties file

Spring Cloud Config Server will allow this type of behavior. Using JCE you can setup a key on the server and use it to cipher the apps properties.

http://cloud.spring.io/spring-cloud-config/spring-cloud-config.html

How to make war file in Eclipse

File -> Export -> Web -> WAR file

OR in Kepler follow as shown below :

enter image description here

[Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified

In reference to the error: [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified.

That error means that the Data Source Name (DSN) you are specifying in your connection configuration is not being found in the windows registry.
- It is important that your ODBC driver's executable and linking format (ELF) is the same as your application. In other words, you need a 32-bit driver for a 32-bit application or a 64-bit driver for a 64-bit application.
  
  If these do not match, it is possible to configure a DSN for a 32-bit driver and when you attempt to use that DSN in a 64-bit application, the DSN won't be found because the registry holds DSN information in different places depending on ELF (32-bit versus 64-bit).
  
  Be sure you are using the correct ODBC Administrator tool. On 32-bit and 64-bit Windows, the default ODBC Administrator tool is in c:\Windows\System32\odbcad32.exe. However, on a 64-bit Windows machine, the default is the 64-bit version. If you need to use the 32-bit ODBC Administrator tool on a 64-bit Windows system, you will need to run the one found here: C:\Windows\SysWOW64\odbcad32.exe
  
  Where I see this tripping people up is when a user uses the default 64-bit ODBC Administrator to configure a DSN; thinking it is for a 32-bit DSN. Then when the 32-bit application attempts to connect using that DSN, "Data source not found..." occurs.
- It's also important to make sure the spelling of the DSN matches that of the configured DSN in the ODBC Administrator. One letter wrong is all it takes for a DSN to be mismatched.
  
  Here is an article that may provide some additional details
  
  It may not be the same product brand that you have, however; it is a generic problem that is encountered when using ODBC data source names.
In reference to the OLE DB Provider portion of your question, it appears to be a similar type of problem where the application is not able to locate the configuration for the specified provider.

Which comment style should I use in batch files?

Another alternative is to express the comment as a variable expansion that always expands to nothing.

Variable names cannot contain =, except for undocumented dynamic variables like
%=ExitCode% and %=C:%. No variable name can ever contain an = after the 1st position. So I sometimes use the following to include comments within a parenthesized block:

::This comment hack is not always safe within parentheses.
(
  %= This comment hack is always safe, even within parentheses =%
)

It is also a good method for incorporating in-line comments

dir junk >nul 2>&1 && %= If found =% echo found || %= else =% echo not found

The leading = is not necessary, but I like if for the symmetry.

There are two restrictions:

1) the comment cannot contain %

2) the comment cannot contain :

How to prevent rm from reporting that a file was not found?

I had same issue for cshell. The only solution I had was to create a dummy file that matched pattern before "rm" in my script.

How to get ID of clicked element with jQuery

First off you can't have just a number for your id unless you are using the HTML5 DOCTYPE. Secondly, you need to either remove the # in each id or replace it with this:

$container.cycle(id.replace('#',''));

Convert a String to a byte array and then back to the original String

Use [String.getBytes()][1] to convert to bytes and use [String(byte[] data)][2] constructor to convert back to string.

C# Threading - How to start and stop a thread

Thread th = new Thread(function1);
th.Start();
th.Abort();

void function1(){
//code here
}

Rollback a Git merge

If you merged the branch, then reverted the merge using a pull request and merged that pull request to revert.

The easiest way I felt was to:

Take out a new branch from develop/master (where you merged)
Revert the "revert" using git revert -m 1 xxxxxx (if the revert was merged using a branch) or using git revert xxxxxx if it was a simple revert
The new branch should now have the changes you want to merge again.
Make changes or merge this branch to develop/master

What is the difference between a token and a lexeme?

Lexeme - A lexeme is a sequence of characters in the source program that matches the pattern for a token and is identified by the lexical analyzer as an instance of that token.

Token - Token is a pair consisting of a token name and an optional token value. The token name is a category of a lexical unit.Common token names are

identifiers: names the programmer chooses
keywords: names already in the programming language
separators (also known as punctuators): punctuation characters and paired-delimiters
operators: symbols that operate on arguments and produce results
literals: numeric, logical, textual, reference literals

Consider this expression in the programming language C:

sum = 3 + 2;

Tokenized and represented by the following table:

 Lexeme        Token category
------------------------------
sum      |    Identifier
 =       |    Assignment operator
 3       |    Integer literal
 +       |    Addition operator
 2       |    Integer literal
 ;       |    End of statement

Update div with jQuery ajax response html

It's also possible to use jQuery's .load()

$('#submitform').click(function() {
  $('#showresults').load('getinfo.asp #showresults', {
    txtsearch: $('#appendedInputButton').val()
  }, function() {
    // alert('Load was performed.')
    // $('#showresults').slideDown('slow')
  });
});

unlike $.get(), allows us to specify a portion of the remote document to be inserted. This is achieved with a special syntax for the url parameter. If one or more space characters are included in the string, the portion of the string following the first space is assumed to be a jQuery selector that determines the content to be loaded.

We could modify the example above to use only part of the document that is fetched:

$( "#result" ).load( "ajax/test.html #container" );

When this method executes, it retrieves the content of ajax/test.html, but then jQuery parses the returned document to find the element with an ID of container. This element, along with its contents, is inserted into the element with an ID of result, and the rest of the retrieved document is discarded.

Restore the mysql database from .frm files

Copy all file and replace to /var/lib/mysql , after that you must change owner of files to mysql this is so important if mariadb.service restart has been faild

chown -R mysql:mysql /var/lib/mysql/*

and

chmod -R 700 /var/lib/mysql/*

The term 'Get-ADUser' is not recognized as the name of a cmdlet

Check here for how to add the activedirectory module if not there by default. This can be done on any machine and then it will allow you to access your active directory "domain control" server.

EDIT

To prevent problems with stale links (I have found MSDN blogs to disappear for no reason in the past), in essence for Windows 7 you need to download and install Remote Server Administration Tools (KB958830). After installing do the following steps:

Open Control Panel -> Programs and Features -> Turn On/Off Windows Features
Find "Remote Server Administration Tools" and expand it
Find "Role Administration Tools" and expand it
Find "AD DS And AD LDS Tools" and expand it
Check the box next to "Active Directory Module For Windows PowerShell".
Click OK and allow Windows to install the feature

Windows server editions should already be OK but if not you need to download and install the Active Directory Management Gateway Service. If any of these links should stop working, you should still be able search for the KB article or download names and find them.

How to write console output to a txt file

In netbeans, you can right click the mouse and then save as a .txt file. Then, based on the created .txt file, you can convert to the file in any format you want to get.

HTTP Error 404 when running Tomcat from Eclipse

Click on Window > Show view > Server OR right click on the server in "Servers" view, select "Properties".
OR Open the Overview screen for the server by double clicking it.
In the Server locations tab , select "Use Tomcat location".
Save the configurations and restart the Server.

This way Eclipse will take full control over Tomcat, this way you'll also be able to access the default Tomcat homepage with the Tomcat Manager when running from inside Eclipse.

Screenshot is attached here

C++ Double Address Operator? (&&)

&& is new in C++11. int&& a means "a" is an r-value reference. && is normally only used to declare a parameter of a function. And it only takes a r-value expression. If you don't know what an r-value is, the simple explanation is that it doesn't have a memory address. E.g. the number 6, and character 'v' are both r-values. int a, a is an l-value, however (a+2) is an r-value. For example:

void foo(int&& a)
{
    //Some magical code...
}

int main()
{
    int b;
    foo(b); //Error. An rValue reference cannot be pointed to a lValue.
    foo(5); //Compiles with no error.
    foo(b+3); //Compiles with no error.

    int&& c = b; //Error. An rValue reference cannot be pointed to a lValue.
    int&& d = 5; //Compiles with no error.
}

Hope that is informative.

How to delete multiple values from a vector?

There is also subset which might be useful sometimes:

a <- sample(1:10)
bad <- c(2, 3, 5)

> subset(a, !(a %in% bad))
[1]  9  7 10  6  8  1  4

libclntsh.so.11.1: cannot open shared object file.

This post helped me solve a similar problem with a PostgreSQL database link to Oracle using oracle_fdw.

I installed oracle_fdw but when I tried CREATE EXTENSION oracle_fdw; I got error could not load library libclntsh.so.11.1: cannot open shared object file: No such file or directory.

I checked $ORACLE_HOME, $PATH and $LD_LIBRARY_PATH.

It worked only AFTER I put Oracle Shared Library on Linux Shared Library

echo /opt/instantclient_11_2 > oracle.conf
ldconfig

Difference between "enqueue" and "dequeue"

A queue is a certain 2-sided data structure. You can add new elements on one side, and remove elements from the other side (as opposed to a stack that has only one side). Enqueue means to add an element, dequeue to remove an element. Please have a look here.

Google Map API v3 ~ Simply Close an infowindow?

Or you can share/reuse the same infoWindow object. See this google demo for reference.

Same code from demo

var Demo = { map: null,  infoWindow: null
};

/**
 * Called when clicking anywhere on the map and closes the info window.
 */
Demo.closeInfoWindow = function() {
  Demo.infoWindow.close();
};

/**
 * Opens the shared info window, anchors it to the specified marker, and
 * displays the marker's position as its content.
 */
Demo.openInfoWindow = function(marker) {
  var markerLatLng = marker.getPosition();
  Demo.infoWindow.setContent([
    '<b>Marker position is:</b><br/>',
    markerLatLng.lat(),
    ', ',
    markerLatLng.lng()
  ].join(''));
  Demo.infoWindow.open(Demo.map, marker);
},

/**
 * Called only once on initial page load to initialize the map.
 */
Demo.init = function() {
  // Create single instance of a Google Map.
  var centerLatLng = new google.maps.LatLng(37.789879, -122.390442);
  Demo.map = new google.maps.Map(document.getElementById('map-canvas'), {
    zoom: 13,
    center: centerLatLng,
    mapTypeId: google.maps.MapTypeId.ROADMAP
  });

  // Create a single instance of the InfoWindow object which will be shared
  // by all Map objects to display information to the user.
  Demo.infoWindow = new google.maps.InfoWindow();

  // Make the info window close when clicking anywhere on the map.
  google.maps.event.addListener(Demo.map, 'click', Demo.closeInfoWindow);

  // Add multiple markers in a few random locations around San Francisco.
  // First random marker
  var marker1 = new google.maps.Marker({
    map: Demo.map,
    position: centerLatLng
  });

  // Register event listeners to each marker to open a shared info
  // window displaying the marker's position when clicked or dragged.
  google.maps.event.addListener(marker1, 'click', function() {
    Demo.openInfoWindow(marker1);
  });

  // Second random marker
  var marker2 = new google.maps.Marker({
    map: Demo.map,
    position: new google.maps.LatLng(37.787814,-122.40764),
    draggable: true
  });

  // Register event listeners to each marker to open a shared info
  // window displaying the marker's position when clicked or dragged.
  google.maps.event.addListener(marker2, 'click', function() {
    Demo.openInfoWindow(marker2);
  });

  // Third random marker
  var marker3 = new google.maps.Marker({
    map: Demo.map,
    position: new google.maps.LatLng(37.767568,-122.391665),
    draggable: true
  });

  // Register event listeners to each marker to open a shared info
  // window displaying the marker's position when clicked or dragged.
  google.maps.event.addListener(marker3, 'click', function() {
    Demo.openInfoWindow(marker3);
  });
}

What is wrong with this code that uses the mysql extension to fetch data from a database in PHP?

Your syntax is wrong... The correct coding is:

 <?php
mysql_connect("localhost","root","");
mysql_select_db("form1");
$query = mysql_query("SELECT * FROM users WHERE name = 'Admin' ");
while($rows = mysql_fetch_array($query))
{

   $rows = $rows['Name'];
   $address = $rows['Address'];
   $email = $rows['Email'];
   $subject = $rows['Subject'];
   $comment = $rows['Comment']
   echo $rows.'</br>'.$address.'</br>'.$email.'</br>'.$subject.'</br>'.$comment;
}
   ?>

iOS 10: "[App] if we're in the real pre-commit handler we can't actually add any new fences due to CA restriction"

Try putting the following in the environment variables for the scheme under run(debug)

OS_ACTIVITY_MODE = disable

Clear a terminal screen for real

Use the following command to do a clear screen instead of merely adding new lines ...

printf "\033c"

yes that's a 'printf' on the bash prompt.

You will probably want to define an alias though...

alias cls='printf "\033c"'

Explanation

\033 == \x1B == 27 == ESC

So this becomes <ESC>c which is the VT100 escape code for resetting the terminal. Here is some more information on terminal escape codes.

Edit

Here are a few other ways of doing it...

printf "\ec" #\e is ESC in bash
echo -en "\ec" #thanks @Jonathon Reinhart.
# -e    Enable interpretation of of backslash escapes
# -n    Do not output a new line

KDE

The above does not work on the KDE console (called Konsole) but there is hope! Use the following sequence of commands to clear the screen and the scroll-back buffer...

clear && echo -en "\e[3J"

Or perhaps use the following alias on KDE...

alias cls='clear && echo -en "\e[3J"'

I got the scroll-back clearing command from here.

How do you get the file size in C#?

FileInfo.Length will do the trick (per MSDN it "[g]ets the size, in bytes, of the current file.") There is a nice page on MSDN on common I/O tasks.

How to fix the error "Windows SDK version 8.1" was not found?

Another way (worked for 2015) is open "Install/remove programs" (Apps & features), find Visual Studio, select Modify. In opened window, press Modify, check

Languages -> Visual C++ -> Common tools for Visual C++
Windows and web development -> Tools for universal windows apps -> Tools (1.4.1) and Windows 10 SDK ([version])
Windows and web development -> Tools for universal windows apps -> Windows 10 SDK ([version])

and install. Then right click on solution -> Re-target and it will compile

How to get pandas.DataFrame columns containing specific dtype

There's a new feature in 0.14.1, select_dtypes to select columns by dtype, by providing a list of dtypes to include or exclude.

For example:

df = pd.DataFrame({'a': np.random.randn(1000),
                   'b': range(1000),
                   'c': ['a'] * 1000,
                   'd': pd.date_range('2000-1-1', periods=1000)})


df.select_dtypes(['float64','int64'])

Out[129]: 
            a    b
0    0.153070    0
1    0.887256    1
2   -1.456037    2
3   -1.147014    3
...

jQuery UI " $("#datepicker").datepicker is not a function"

I ran into this problem recently - the issue was that I had included the jQuery UI files in the head tag, but the Telerik library I was using included jQuery at the bottom of the body tag (thus apparently re-initializing jQuery and unloading the UI plugins previously loaded).

The solution was to find out where jQuery was actually being included, and including the jQuery UI scripts after that.

Error :Request header field Content-Type is not allowed by Access-Control-Allow-Headers

It is most likely due to a cross-origin request, but it may not be. For me, I had been debugging an API and had set the Access-Control-Allow-Origin to *, but it appears that recent versions of Chrome are requiring an extra header. Try prepending the following to your file if you are using PHP:

header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept");

Make sure that you haven't already used header in another file, or you will get a nasty error. See the docs for more.

How to select a div element in the code-behind page?

You have make div as server control using following code,

<div class="tab-pane active" id="portlet_tab1" runat="server">

then this div will be accessible in code behind.

C# Convert string from UTF-8 to ISO-8859-1 (Latin1) H

Use Encoding.Convert to adjust the byte array before attempting to decode it into your destination encoding.

Encoding iso = Encoding.GetEncoding("ISO-8859-1");
Encoding utf8 = Encoding.UTF8;
byte[] utfBytes = utf8.GetBytes(Message);
byte[] isoBytes = Encoding.Convert(utf8, iso, utfBytes);
string msg = iso.GetString(isoBytes);

CSS text-transform capitalize on all caps

I know this is a late response but if you want to compare the performance of various solutions I have a jsPerf that I created.

Regex solutions are the fastest for sure.

Here is the jsPerf: https://jsperf.com/capitalize-jwaz

There are 2 regex solutions.

The first one uses/\b[a-z]/g. Word boundary will capital words such as non-disclosure to Non-Disclosure.

If you only want to capitalize letters that are preceded by a space then use the second regex

/(^[a-z]|\s[a-z])/g

How to Get JSON Array Within JSON Object?

JSONObject jsonObj = new JSONObject(jsonString);

JSONArray jArray = jsonObj.getJSONArray("data");
int length = jArray.length();

   for(int i=0; i<length; i++)
      {
        JSONObject jObj = jArray.getJSONObject(i);
        String id = jObj.optString("id");
        String name=jObj.optString("name");

        JSONArray ingredientArray = jObj.getJSONArray("Ingredients");
        int size = ingredientArray.length();
        ArrayList<String> Ingredients = new ArrayList<>();

            for(int j=0; j<size; j++)
               {
                    JSONObject json = ja.getJSONObject(j);
                    Ingredients.add(json.optString("name"));
                }


       }

Docker: How to delete all local Docker images

Here is short and quick solution I used

Docker provides a single command that will clean up any resources — images, containers, volumes, and networks — that are dangling (not associated with a container):

docker system prune

To additionally remove any stopped containers and all unused images (not just dangling images), add the -a flag to the command:

docker system prune -a

For more details visit link

How can I get the UUID of my Android phone in an application?

Add

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

Method

String getUUID(){
    TelephonyManager teleManager = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
    String tmSerial = teleManager.getSimSerialNumber();
    String tmDeviceId = teleManager.getDeviceId();
    String androidId = android.provider.Settings.Secure.getString(getContentResolver(), android.provider.Settings.Secure.ANDROID_ID);
    if (tmSerial  == null) tmSerial   = "1";
    if (tmDeviceId== null) tmDeviceId = "1";
    if (androidId == null) androidId  = "1";
    UUID deviceUuid = new UUID(androidId.hashCode(), ((long)tmDeviceId.hashCode() << 32) | tmSerial.hashCode());
    String uniqueId = deviceUuid.toString();
    return uniqueId;
}

Get the full URL in PHP

Same technique as the accepted answer, but with HTTPS support, and more readable:

$current_url = sprintf(
    '%s://%s/%s',
    isset($_SERVER['HTTPS']) ? 'https' : 'http',
    $_SERVER['HTTP_HOST'],
    $_SERVER['REQUEST_URI']
);

Is it still valid to use IE=edge,chrome=1?

<head>
<meta http-equiv='X-UA-Compatible' content='IE=edge'>

worked for me, to force IE to "snap out of compatibility mode" (so to speak), BUT that meta statement must appear IMMEDIATELY after the <head>, or it won't work!

Extract Month and Year From Date in R

This will add a new column to your data.frame with the specified format.

df$Month_Yr <- format(as.Date(df$Date), "%Y-%m")

df
#>   ID       Date Month_Yr
#> 1  1 2004-02-06  2004-02
#> 2  2 2006-03-14  2006-03
#> 3  3 2007-07-16  2007-07

# your data sample
  df <- data.frame( ID=1:3,Date = c("2004-02-06" , "2006-03-14" , "2007-07-16") )

a simple example:

dates <- "2004-02-06"

format(as.Date(dates), "%Y-%m")
> "2004-02"

side note: the data.table approach can be quite faster in case you're working with a big dataset.

library(data.table)
setDT(df)[, Month_Yr := format(as.Date(Date), "%Y-%m") ]

Display HTML form values in same page after submit using Ajax

Here is one way to do it.

<!DOCTYPE html>
<html>
  <head lang="en">
  <meta charset="UTF-8">
  <script language="JavaScript">
    function showInput() {
        document.getElementById('display').innerHTML = 
                    document.getElementById("user_input").value;
    }
  </script>

  </head>
<body>

  <form>
    <label><b>Enter a Message</b></label>
    <input type="text" name="message" id="user_input">
  </form>

  <input type="submit" onclick="showInput();"><br/>
  <label>Your input: </label>
  <p><span id='display'></span></p>
</body>
</html>

And this is what it looks like when run.Cheers.

enter image description here

Lazy Loading vs Eager Loading

Lazy loading will produce several SQL calls while Eager loading may load data with one "more heavy" call (with joins/subqueries).

For example, If there is a high ping between your web and sql servers you would go with Eager loading instead of loading related items 1-by-1 with lazy Loading.

Attach IntelliJ IDEA debugger to a running Java process

Yes! Here is how you set it up.

Run Configuration

Create a Remote run configuration:

Run -> Edit Configurations...
Click the "+" in the upper left
Select the "Remote" option in the left-most pane
Choose a name (I named mine "remote-debugging")
Click "OK" to save:

enter image description here

JVM Options

The configuration above provides three read-only fields. These are options that tell the JVM to open up port 5005 for remote debugging when running your application. Add the appropriate one to the JVM options of the application you are debugging. One way you might do this would be like so:

export JAVA_OPTS="-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005"

But it depends on how your run your application. If you're not sure which of the three applies to you, start with the first and go down the list until you find the one that works.

You can change suspend=n to suspend=y to force your application to wait until you connect with IntelliJ before it starts up. This is helpful if the breakpoint you want to hit occurs on application startup.

Debug

Start your application as you would normally, then in IntelliJ select the new configuration and hit 'Debug'.

enter image description here

IntelliJ will connect to the JVM and initiate remote debugging.

You can now debug the application by adding breakpoints to your code where desired. The output of the application will still appear wherever it did before, but your breakpoints will hit in IntelliJ.

Why binary_crossentropy and categorical_crossentropy give different performances for the same problem?

It's really interesting case. Actually in your setup the following statement is true:

binary_crossentropy = len(class_id_index) * categorical_crossentropy

This means that up to a constant multiplication factor your losses are equivalent. The weird behaviour that you are observing during a training phase might be an example of a following phenomenon:

At the beginning the most frequent class is dominating the loss - so network is learning to predict mostly this class for every example.
After it learnt the most frequent pattern it starts discriminating among less frequent classes. But when you are using adam - the learning rate has a much smaller value than it had at the beginning of training (it's because of the nature of this optimizer). It makes training slower and prevents your network from e.g. leaving a poor local minimum less possible.

That's why this constant factor might help in case of binary_crossentropy. After many epochs - the learning rate value is greater than in categorical_crossentropy case. I usually restart training (and learning phase) a few times when I notice such behaviour or/and adjusting a class weights using the following pattern:

class_weight = 1 / class_frequency

This makes loss from a less frequent classes balancing the influence of a dominant class loss at the beginning of a training and in a further part of an optimization process.

EDIT:

Actually - I checked that even though in case of maths:

binary_crossentropy = len(class_id_index) * categorical_crossentropy

should hold - in case of keras it's not true, because keras is automatically normalizing all outputs to sum up to 1. This is the actual reason behind this weird behaviour as in case of multiclassification such normalization harms a training.

How to get the size of a file in MB (Megabytes)?

Easiest is by using FileUtils from Apache commons-io.( https://commons.apache.org/proper/commons-io/javadocs/api-2.5/org/apache/commons/io/FileUtils.html )

Returns human readable file size from Bytes to Exabytes , rounding down to the boundary.

File fileObj = new File(filePathString);
String fileSizeReadable = FileUtils.byteCountToDisplaySize(fileObj.length());

// output will be like 56 MB

How to get the device's IMEI/ESN programmatically in android?

As in API 26 getDeviceId() is depreciated so you can use following code to cater API 26 and earlier versions

TelephonyManager telephonyManager = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
String imei="";
if (android.os.Build.VERSION.SDK_INT >= 26) {
  imei=telephonyManager.getImei();
}
else
{
  imei=telephonyManager.getDeviceId();
}

Don't forget to add permission requests for READ_PHONE_STATE to use the above code.

UPDATE: From Android 10 its is restricted for user apps to get non-resettable hardware identifiers like IMEI.

Pseudo-terminal will not be allocated because stdin is not a terminal

I was having the same error under Windows using emacs 24.5.1 to connect to some company servers through /ssh:user@host. What solved my problem was setting the "tramp-default-method" variable to "plink" and whenever I connect to a server I ommit the ssh protocol. You need to have PuTTY's plink.exe installed for this to work.

Solution

M-x customize-variable (and then hit Enter)
tramp-default-method (and then hit Enter again)
On the text field put plink and then Apply and Save the buffer
Whenever I try to access a remote server I now use C-x-f /user@host: and then input the password. The connection is now correctly made under Emacs on Windows to my remote server.

NuGet Packages are missing

A different user name is the common cause for this, Nuget downloads everything into: "C:\Users\USER_NAME\source\repos" and if you had the project previously setup on a different user name the .csproj file may still contain that old user name there, simply open it and do a search replace for "C:\Users\_OLD_USER_NAME\source\repos" to "C:\Users\NEW_USER_NAME\source\repos".

RegisterStartupScript from code behind not working when Update Panel is used

You need to use ScriptManager.RegisterStartupScript for Ajax.

protected void ButtonPP_Click(object sender, EventArgs e) {     if (radioBtnACO.SelectedIndex < 0)     {         string csname1 = "PopupScript";          var cstext1 = new StringBuilder();         cstext1.Append("alert('Please Select Criteria!')");          ScriptManager.RegisterStartupScript(this, GetType(), csname1,             cstext1.ToString(), true);     } }

How to programmatically log out from Facebook SDK 3.0 without using Facebook login/logout button?

Update for latest SDK:

Now @zeuter's answer is correct for Facebook SDK v4.7+:

LoginManager.getInstance().logOut();

Original answer:

Please do not use SessionTracker. It is an internal (package private) class, and is not meant to be consumed as part of the public API. As such, its API may change at any time without any backwards compatibility guarantees. You should be able to get rid of all instances of SessionTracker in your code, and just use the active session instead.

To answer your question, if you don't want to keep any session data, simply call closeAndClearTokenInformation when your app closes.

How to check if smtp is working from commandline (Linux)

[root@piwik-dev tmp]# mail -v root@localhost
Subject: Test
Hello world
Cc:  <Ctrl+D>

root@localhost... Connecting to [127.0.0.1] via relay...
220 piwik-dev.example.com ESMTP Sendmail 8.13.8/8.13.8; Thu, 23 Aug 2012 10:49:40 -0400
>>> EHLO piwik-dev.example.com
250-piwik-dev.example.com Hello localhost.localdomain [127.0.0.1], pleased to meet you
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-8BITMIME
250-SIZE
250-DSN
250-ETRN
250-DELIVERBY
250 HELP
>>> MAIL From:<[email protected]> SIZE=46
250 2.1.0 <[email protected]>... Sender ok
>>> RCPT To:<[email protected]>
>>> DATA
250 2.1.5 <[email protected]>... Recipient ok
354 Enter mail, end with "." on a line by itself
>>> .
250 2.0.0 q7NEneju002633 Message accepted for delivery
root@localhost... Sent (q7NEneju002633 Message accepted for delivery)
Closing connection to [127.0.0.1]
>>> QUIT
221 2.0.0 piwik-dev.example.com closing connection

How to add a .dll reference to a project in Visual Studio

Another method is by using the menu within visual studio. Project -> Add Reference... I recommend copying the needed .dll to your resource folder, or local project folder.

Is there a way to add/remove several classes in one single instruction with classList?

The new spread operator makes it even easier to apply multiple CSS classes as array:

const list = ['first', 'second', 'third'];
element.classList.add(...list);

Is it possible to set an object to null?

You want to check if an object is NULL/empty. Being NULL and empty are not the same. Like Justin and Brian have already mentioned, in C++ NULL is an assignment you'd typically associate with pointers. You can overload operator= perhaps, but think it through real well if you actually want to do this. Couple of other things:

In C++ NULL pointer is very different to pointer pointing to an 'empty' object.
Why not have a bool IsEmpty() method that returns true if an object's variables are reset to some default state? Guess that might bypass the NULL usage.
Having something like A* p = new A; ... p = NULL; is bad (no delete p) unless you can ensure your code will be garbage collected. If anything, this'd lead to memory leaks and with several such leaks there's good chance you'd have slow code.
You may want to do this class Null {}; Null _NULL; and then overload operator= and operator!= of other classes depending on your situation.

Perhaps you should post us some details about the context to help you better with option 4.

Arpan

Problems when trying to load a package in R due to rJava

Its because either one of the Java versions(32 bit/64 bit) is missing from your computer. Try installing both the Jdks and run the code.
After installing the Jdks open R and type the code

system("java -version")

This will give you the version of Jdk installed. Then try loading the rJava package. This worked for me.

How can I check whether Google Maps is fully loaded?

This was bothering me for a while with GMaps v3.

I found a way to do it like this:

google.maps.event.addListenerOnce(map, 'idle', function(){
    // do something only the first time the map is loaded
});

The "idle" event is triggered when the map goes to idle state - everything loaded (or failed to load). I found it to be more reliable then tilesloaded/bounds_changed and using addListenerOnce method the code in the closure is executed the first time "idle" is fired and then the event is detached.

See also the events section in the Google Maps Reference.

Cannot add or update a child row: a foreign key constraint fails

That error occurs when you want to add a foreign key with values that don't exist in the primary key of the parent table. You must be sure that the new foreign key UserID in table2 has values that exist in the table1 primary key, sometimes by default it is null or equal to 0.

You could first update all the fields of the foreign key in table2 with a value that exists in the primary key of table1.

update table2 set UserID = 1 where UserID is null

If you want to add different UserIDs you must modify each row with the values you want.

Extract a substring from a string in Ruby using a regular expression

"<name> <substring>"[/.*<([^>]*)/,1]
=> "substring"

No need to use scan, if we need only one result.
No need to use Python's match, when we have Ruby's String[regexp,#].

See: http://ruby-doc.org/core/String.html#method-i-5B-5D

Note: str[regexp, capture] ? new_str or nil

HTML CSS Button Positioning

[type=submit]{
    margin-left: 121px;
    margin-top: 19px;
    width: 84px;
    height: 40px;   
    font-size:14px;
    font-weight:700;
}

Why can't I do <img src="C:/localfile.jpg">?

I have tried a lot of techniques and finally found one in C# side and JS Side. You cannot give a physical path to src attribute but you can give the base64 string as a src to Img tag. Lets look into the below C# code example.

<asp:Image ID="imgEvid" src="#" runat="server" Height="99px"/>

C# code

 if (File.Exists(filepath)
                            {
                                byte[] imageArray = System.IO.File.ReadAllBytes(filepath);
                                string base64ImageRepresentation = Convert.ToBase64String(imageArray);
                                var val = $"data: image/png; base64,{base64ImageRepresentation}";
                                imgEvid.Attributes.Add("src", val);
                            }

Hope this will help

Create an ArrayList of unique values

You can read from file to map, where the key is the date and skip if the the whole row if the date is already in map

        Map<String, List<String>> map = new HashMap<String, List<String>>();

        int i = 0;
        String lastData = null;
        while (s.hasNext()) {
            String str = s.next();
            if (i % 13 == 0) {
                if (map.containsKey(str)) {
                    //skip the whole row
                    lastData = null;
                } else {
                    lastData = str;
                    map.put(lastData, new ArrayList<String>());
                }
            } else if (lastData != null) {
                map.get(lastData).add(str);
            }


            i++;
        }

Pass correct "this" context to setTimeout callback?

If you're using underscore, you can use bind.

E.g.

if (this.options.destroyOnHide) {
     setTimeout(_.bind(this.tip.destroy, this), 1000);
}

MomentJS getting JavaScript Date in UTC

Or simply:

Date.now

From MDN documentation:

The Date.now() method returns the number of milliseconds elapsed since January 1, 1970

Available since ECMAScript 5.1

It's the same as was mentioned above (new Date().getTime()), but more shortcutted version.

Setting up enviromental variables in Windows 10 to use java and javac

Adding Environment Variable simplified with screenshot. Check the below URL and you should be able to do without any trouble.

https://itsforlavanya.blogspot.com/2020/08/environment-variable-simple-7-steps-to.html

How to convert array values to lowercase in PHP?

Just for completeness: you may also use array_walk:

array_walk($yourArray, function(&$value)
{
  $value = strtolower($value);
});

From PHP docs:

If callback needs to be working with the actual values of the array, specify the first parameter of callback as a reference. Then, any changes made to those elements will be made in the original array itself.

Or directly via foreach loop using references:

foreach($yourArray as &$value)
  $value = strtolower($value);

Note that these two methods change the array "in place", whereas array_map creates and returns a copy of the array, which may not be desirable in case of very large arrays.

Python Sets vs Lists

tl;dr

Data structures (DS) are important because they are used to perform operations on data which basically implies: take some input, process it, and give back the output.

Some data structures are more useful than others in some particular cases. Therefore, it is quite unfair to ask which (DS) is more efficient/speedy. It is like asking which tool is more efficient between a knife and fork. I mean all depends on the situation.

Lists

A list is mutable sequence, typically used to store collections of homogeneous items.

Sets

A set object is an unordered collection of distinct hashable objects. It is commonly used to test membership, remove duplicates from a sequence, and compute mathematical operations such as intersection, union, difference, and symmetric difference.

Usage

From some of the answers, it is clear that a list is quite faster than a set when iterating over the values. On the other hand, a set is faster than a list when checking if an item is contained within it. Therefore, the only thing you can say is that a list is better than a set for some particular operations and vice-versa.

How to find a text inside SQL Server procedures / triggers?

There are much better solutions than modifying the text of your stored procedures, functions, and views each time the linked server changes. Here are some options:

Update the linked server. Instead of using a linked server named with its IP address, create a new linked server with the name of the resource such as Finance or DataLinkProd or some such. Then when you need to change which server is reached, update the linked server to point to the new server (or drop it and recreate it).
While unfortunately you cannot create synonyms for linked servers or schemas, you CAN make synonyms for objects that are located on linked servers. For example, your procedure [10.10.100.50].dbo.SPROCEDURE_EXAMPLE could by aliased. Perhaps create a schema datalinkprod, then CREATE SYNONYM datalinkprod.dbo_SPROCEDURE_EXAMPLE FOR [10.10.100.50].dbo.SPROCEDURE_EXAMPLE;. Then, write a stored procedure that accepts a linked server name, which queries all the potential objects from the remote database and (re)creates synonyms for them. All your SPs and functions get rewritten just once to use the synonym names starting with datalinkprod, and ever after that, to change from one linked server to another you just do EXEC dbo.SwitchLinkedServer '[10.10.100.51]'; and in a fraction of a second you're using a different linked server.

There may be even more options. I highly recommend using the superior techniques of pre-processing, configuration, or indirection rather than changing human-written scripts. Automatically updating machine-created scripts is fine, this is preprocessing. Doing things manually is awful.

Optimal number of threads per core

If your threads don't do I/O, synchronization, etc., and there's nothing else running, 1 thread per core will get you the best performance. However that very likely not the case. Adding more threads usually helps, but after some point, they cause some performance degradation.

Not long ago, I was doing performance testing on a 2 quad-core machine running an ASP.NET application on Mono under a pretty decent load. We played with the minimum and maximum number of threads and in the end we found out that for that particular application in that particular configuration the best throughput was somewhere between 36 and 40 threads. Anything outside those boundaries performed worse. Lesson learned? If I were you, I would test with different number of threads until you find the right number for your application.

One thing for sure: 4k threads will take longer. That's a lot of context switches.

What is the use of the square brackets [] in sql statements?

The brackets can be used when column names are reserved words.

If you are programatically generating the SQL statement from a collection of column names you don't control, then you can avoid problems by always using the brackets.

HTML how to clear input using javascript?

<script type="text/javascript">
    function clearThis(target){
        if(target.value=='[email protected]'){
        target.value= "";}
    }
    </script>

Is this really what your looking for?

How to revert to origin's master branch's version of file

If you didn't commit it to the master branch yet, its easy:

get off the master branch (like git checkout -b oops/fluke/dang)
commit your changes there (like git add -u; git commit;)
go back the master branch (like git checkout master)

Your changes will be saved in branch oops/fluke/dang; master will be as it was.

Angular 2 Scroll to top on Route Change

You can write this more succinctly by taking advantage of the observable filter method:

this.router.events.filter(event => event instanceof NavigationEnd).subscribe(() => {
      this.window.scrollTo(0, 0);
});

If you're having issues scrolling to the top when using the Angular Material 2 sidenav this will help. The window or document body won't have the scrollbar so you need to get the sidenav content container and scroll that element, otherwise try scrolling the window as a default.

this.router.events.filter(event => event instanceof NavigationEnd)
  .subscribe(() => {
      const contentContainer = document.querySelector('.mat-sidenav-content') || this.window;
      contentContainer.scrollTo(0, 0);
});

Also, the Angular CDK v6.x has a scrolling package now that might help with handling scrolling.

How do I remove a file from the FileList

If you are targeting evergreen browsers (Chrome, Firefox, Edge, but also works in Safari 9+) or you can afford a polyfill, you can turn the FileList into an array by using Array.from() like this:

let fileArray = Array.from(fileList);

Then it's easy to handle the array of Files like any other array.

How to use SVG markers in Google Maps API v3

As mentioned by others in this thread, don't forget to explicitly set the width and height attributes in the svg like so:

<svg id="some_id" data-name="some_name" xmlns="http://www.w3.org/2000/svg"
     viewBox="0 0 26 42"
     width="26px" height="42px">

if you don't do that no js manipulation can help you as gmaps will not have a frame of reference and always use a standard size.

(i know it has been mentioned in some comments, but they are easy to miss. This information helped me in various cases)

How to make a programme continue to run after log out from ssh?

You could use screen, detach and reattach

Constantly print Subprocess output while process is running

Ok i managed to solve it without threads (any suggestions why using threads would be better are appreciated) by using a snippet from this question Intercepting stdout of a subprocess while it is running

def execute(command):
    process = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)

    # Poll process for new output until finished
    while True:
        nextline = process.stdout.readline()
        if nextline == '' and process.poll() is not None:
            break
        sys.stdout.write(nextline)
        sys.stdout.flush()

    output = process.communicate()[0]
    exitCode = process.returncode

    if (exitCode == 0):
        return output
    else:
        raise ProcessException(command, exitCode, output)

What causes javac to issue the "uses unchecked or unsafe operations" warning

I just want to add one example of the kind of unchecked warning I see quite often. If you use classes that implement an interface like Serializable, often you will call methods that return objects of the interface, and not the actual class. If the class being returned must be cast to a type based on generics, you can get this warning.

Here is a brief (and somewhat silly) example to demonstrate:

import java.io.Serializable;

public class SimpleGenericClass<T> implements Serializable {

    public Serializable getInstance() {
        return this;
    }

    // @SuppressWarnings("unchecked")
    public static void main() {

        SimpleGenericClass<String> original = new SimpleGenericClass<String>();

        //  java: unchecked cast
        //    required: SimpleGenericClass<java.lang.String>
        //    found:    java.io.Serializable
        SimpleGenericClass<String> returned =
                (SimpleGenericClass<String>) original.getInstance();
    }
}

getInstance() returns an object that implements Serializable. This must be cast to the actual type, but this is an unchecked cast.

Making a Windows shortcut start relative to where the folder is?

I like leoj3n's solution. It can also be used to set a relative "start in" directory, which is what I needed by using start's /D parameter. Without /c or /k in as an argument to cmd, the subsequent start command doesn't run. /c will close the shell immediately after running the command and /k will keep it open (even after the command is done). So if whatever you're running spits to standard out and you need to see it, use /k.

Unfortunately, according to the lnk file specification, the icon is not saved in the shortcut, but rather "encoded using environment variables, which makes it possible to find the icon across machines where the locations vary but are expressed using environment variables." So it's likely that if paths are changing and you're trying to take the icon from the executable you're pointing to, it won't transfer correctly.

Given a filesystem path, is there a shorter way to extract the filename without its extension?

string filepath = "C:\\Program Files\\example.txt";
FileVersionInfo myFileVersionInfo = FileVersionInfo.GetVersionInfo(filepath);
FileInfo fi = new FileInfo(filepath);
Console.WriteLine(fi.Name);

//input to the "fi" is a full path to the file from "filepath"
//This code will return the fileName from the given path

//output
//example.txt

What is difference between 'git reset --hard HEAD~1' and 'git reset --soft HEAD~1'?

Git reset has 5 main modes: soft, mixed, merged, hard, keep. The difference between them is to change or not change head, stage (index), working directory.

Git reset --hard will change head, index and working directory.
Git reset --soft will change head only. No change to index, working directory.

So in other words if you want to undo your commit, --soft should be good enough. But after that you still have the changes from bad commit in your index and working directory. You can modify the files, fix them, add them to index and commit again.

With the --hard, you completely get a clean slate in your project. As if there hasn't been any change from the last commit. If you are sure this is what you want then move forward. But once you do this, you'll lose your last commit completely. (Note: there are still ways to recover the lost commit).

Invalid length parameter passed to the LEFT or SUBSTRING function

Something else you can use is isnull:

isnull( SUBSTRING(PostCode, 1 , CHARINDEX(' ', PostCode ) -1), PostCode)

Setting width of spreadsheet cell using PHPExcel

setAutoSize method must come before setWidth:

$objPHPExcel->getActiveSheet()->getColumnDimensionByColumn('C')->setAutoSize(false);
$objPHPExcel->getActiveSheet()->getColumnDimensionByColumn('C')->setWidth('10');

Inserting a Python datetime.datetime object into MySQL

when iserting into t-sql

this fails:

select CONVERT(datetime,'2019-09-13 09:04:35.823312',21)

this works:

select CONVERT(datetime,'2019-09-13 09:04:35.823',21)

easy way:

regexp = re.compile(r'\.(\d{6})')
def to_splunk_iso(dt):
    """Converts the datetime object to Splunk isoformat string."""
    # 6-digits string.
    microseconds = regexp.search(dt).group(1)
    return regexp.sub('.%d' % round(float(microseconds) / 1000), dt)

How to get the day of week and the month of the year?

One thing you can also do is Extend date object to return Weekday by:

Date.prototype.getWeekDay = function() {
    var weekday = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"];
    return weekday[this.getDay()];
}

so, you can only call date.getWeekDay();

How to change background color in the Notepad++ text editor?

You may need admin access to do it on your system.

Create a folder 'themes' in the Notepad++ installation folder i.e. C:\Program Files (x86)\Notepad++
Search or visit pages like http://timtrott.co.uk/notepad-colour-schemes/ to download the favourite theme. It will be an SML file.
- Note: I prefer Neon any day.
Download the themes from the site and drag them to the themes folder.
- Note: I was unable to copy-paste or create new files in 'themes' folder so I used drag and that worked.
Follow the steps provided by @triforceofcourage to select the new theme in Notepad++ preferences.

Merge, update, and pull Git branches without using checkouts

The question is simple and the answer should be as simple. All the OP is asking is to merge the upstream origin/branchB into his current branch without switching branches.

TL;DR:

git fetch
git merge origin/branchB

The full answer:

git pull does a fetch + merge. It's roughly the the same the two commands below, where <remote> is usually origin (default), and the remote tracking branch starts with <remote>/ followed by the remote branch name:

git fetch [<remote>]
git merge @{u}

The @{u} notation is the configured remote tracking branch for the current branch. If branchB tracks origin/branchB then @{u} from branchB is the same as typing origin/branchB (see git rev-parse --help for more info).

Since you already merge with origin/branchB, all that is missing is the git fetch (which can run from any branch) to update that remote-tracking branch.

Note though that if there was any merge from the pull to include, you should rather merge branchB into branchA after having done a pull from branchB (and eventually push the changes to orign/branchB), but as long as they're fast-forward they would remain the same.

Keep in mind the local branchB will not be updated until you switch to it and do an actual pull, however as long as there are no local commits added to this branch it will just remain a fast-forward to the remote branch.

What is a None value?

Martijn's answer explains what None is in Python, and correctly states that the book is misleading. Since Python programmers as a rule would never say

Assigning a value of None to a variable is one way to reset it to its original, empty state.

it's hard to explain what Briggs means in a way which makes sense and explains why no one here seems happy with it. One analogy which may help:

In Python, variable names are like stickers put on objects. Every sticker has a unique name written on it, and it can only be on one object at a time, but you could put more than one sticker on the same object, if you wanted to. When you write

F = "fork"

you put the sticker "F" on a string object "fork". If you then write

F = None

you move the sticker to the None object.

What Briggs is asking you to imagine is that you didn't write the sticker "F", there was already an F sticker on the None, and all you did was move it, from None to "fork". So when you type F = None, you're "reset[ting] it to its original, empty state", if we decided to treat None as meaning empty state.

I can see what he's getting at, but that's a bad way to look at it. If you start Python and type print(F), you see

>>> print(F)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'F' is not defined

and that NameError means Python doesn't recognize the name F, because there is no such sticker. If Briggs were right and F = None resets F to its original state, then it should be there now, and we should see

>>> print(F)
None

like we do after we type F = None and put the sticker on None.

So that's all that's going on. In reality, Python comes with some stickers already attached to objects (built-in names), but others you have to write yourself with lines like F = "fork" and A = 2 and c17 = 3.14, and then you can stick them on other objects later (like F = 10 or F = None; it's all the same.)

Briggs is pretending that all possible stickers you might want to write were already stuck to the None object.

How do I programmatically set device orientation in iOS 7?

This works for me on Xcode 6 & 5.

- (BOOL)shouldAutorotate {
    return YES;
}
- (NSUInteger)supportedInterfaceOrientations {
    return (UIInterfaceOrientationMaskPortrait);
}

how to stop a running script in Matlab

To add on:

you can insert a time check within a loop with intensive or possible deadlock, ie.

:
section_toc_conditionalBreakOff;
:

where within this section

if (toc > timeRequiredToBreakOff)     % time conditional break off
      return;
      % other options may be:                         
      % 1. display intermediate values with pause;
      % 2. exit;                           % in some cases, extreme : kill/ quit matlab
end

jQuery click anywhere in the page except on 1 div

I know that this question has been answered, And all the answers are nice. But I wanted to add my two cents to this question for people who have similar (but not exactly the same) problem.

In a more general way, we can do something like this:

$('body').click(function(evt){    
    if(!$(evt.target).is('#menu_content')) {
        //event handling code
    }
});

This way we can handle not only events fired by anything except element with id menu_content but also events that are fired by anything except any element that we can select using CSS selectors.

For instance in the following code snippet I am getting events fired by any element except all <li> elements which are descendants of div element with id myNavbar.

$('body').click(function(evt){    
    if(!$(evt.target).is('div#myNavbar li')) {
        //event handling code
    }
});

Jquery to change form action

To change action value of form dynamically, you can try below code:

below code is if you are opening some dailog box and inside that dailog box you have form and you want to change the action of it. I used Bootstrap dailog box and on opening of that dailog box I am assigning action value to the form.

$('#your-dailog-id').on('show.bs.modal', function (event) {
    var link = $(event.relatedTarget);// Link that triggered the modal
    var cURL= link.data('url');// Extract info from data-* attributes
    $("#delUserform").attr("action", cURL);
});

If you are trying to change the form action on regular page, use below code

$("#yourElementId").change(function() { 
  var action = <generate_action>;
  $("#formId").attr("action", action);
});

What is the default scope of a method in Java?

Anything defined as package private can be accessed by the class itself, other classes within the same package, but not outside of the package, and not by sub-classes.

See this page for a handy table of access level modifiers...

javascript functions to show and hide divs

Rename the closing function as 'hide', for example and it will work.

function hide() {
    if(document.getElementById('benefits').style.display=='block') {
      document.getElementById('benefits').style.display='none';
    }
}

Converting string to title case

Alternative with reference to Microsoft.VisualBasic (handles uppercase strings too) :

string properCase = Strings.StrConv(str, VbStrConv.ProperCase);

Create pandas Dataframe by appending one row at a time

Make it simple. By taking list as input which will be appended as row in data-frame:-

import pandas as pd  
res = pd.DataFrame(columns=('lib', 'qty1', 'qty2'))  
for i in range(5):  
    res_list = list(map(int, input().split()))  
    res = res.append(pd.Series(res_list,index=['lib','qty1','qty2']), ignore_index=True)

How to avoid "cannot load such file -- utils/popen" from homebrew on OSX

First I executed:

sudo chown -R $(whoami):admin /usr/local

Then:

cd $(brew --prefix) && git fetch origin && git reset --hard origin/master

Text inset for UITextField?

I subclased UITextField to handle this that supports left, top, right and bottom inset, and clear button positioning as well.

MRDInsetTextField.h

#import <UIKit/UIKit.h>

@interface MRDInsetTextField : UITextField

@property (nonatomic, assign) CGRect inset;

@end

MRDInsetTextField.m

#import "MRDInsetTextField.h"

@implementation MRDInsetTextField

- (id)init
{
    self = [super init];
    if (self) {
        _inset = CGRectZero;
    }
    return self;
}

- (id)initWithCoder:(NSCoder *)aDecoder
{
    self = [super initWithCoder:aDecoder];
    if (self) {
        _inset = CGRectZero;
    }
    return self;
}

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        _inset = CGRectZero;
    }
    return self;
}

- (void)setInset:(CGRect)inset {
    _inset = inset;

    [self setNeedsLayout];
}

- (CGRect)getRectForBounds:(CGRect)bounds withInset:(CGRect)inset {

    CGRect newRect = CGRectMake(
                         bounds.origin.x + inset.origin.x,
                         bounds.origin.y + inset.origin.y,
                         bounds.origin.x + bounds.size.width - inset.origin.x - inset.size.width,
                         bounds.origin.y + bounds.size.height - inset.origin.y - inset.size.height
                         );

    return newRect;
}

- (CGRect)textRectForBounds:(CGRect)bounds {
    return [self getRectForBounds:[super textRectForBounds:bounds] withInset:_inset];
}

- (CGRect)placeholderRectForBounds:(CGRect)bounds {
    return [self getRectForBounds:bounds withInset:_inset];
}

- (CGRect)editingRectForBounds:(CGRect)bounds {
    return [self getRectForBounds:[super editingRectForBounds:bounds] withInset:_inset];
}

- (CGRect)clearButtonRectForBounds:(CGRect)bounds {
    return CGRectOffset([super clearButtonRectForBounds:bounds], -_inset.size.width, _inset.origin.y/2 - _inset.size.height/2);
}

@end

Example of usage where *_someTextField* comes from nib/storyboard view with MRDInsetTextField custom class

[(MRDInsetTextField*)_someTextField setInset:CGRectMake(5, 0, 5, 0)]; // left, top, right, bottom inset

How to set recurring schedule for xlsm file using Windows Task Scheduler

Better to use a vbs as you indicated

Create a simple vbs, which is a text file with a .vbs extension (see sample code below)
Use the Task Scheduler to run the vbs
Use the vbs to open the workbook at the scheduled time and then either:
- use the Private Sub Workbook_Open() event in the ThisWorkbook module to run code when the file is opened
- more robustly (as macros may be disabled on open), use Application.Run in the vbs to run the macro

See this example of the later approach at Running Excel on Windows Task Scheduler

sample vbs

Dim ObjExcel, ObjWB
Set ObjExcel = CreateObject("excel.application")
'vbs opens a file specified by the path below
Set ObjWB = ObjExcel.Workbooks.Open("C:\temp\rod.xlsm")
'either use the Workbook Open event (if macros are enabled), or Application.Run

ObjWB.Close False
ObjExcel.Quit
Set ObjExcel = Nothing

How can I get a side-by-side diff when I do "git diff"?

This may be a somewhat limited solution, but does the job using the system's diff command without external tools:

diff -y  <(git show from-rev:the/file/path) <(git show to-rev:the/file/path)

filter just the change lines use --suppress-common-lines (if your diff supports the option).
no colors in this case, just the usual diff markers
can tweak the column width --width=term-width; in Bash can get the width as $COLUMNS or tput cols.

This can be wrapped into a helper git-script too for more convenience, for example, usage like this:

git diffy the/file/path --from rev1 --to rev2

Razor MVC Populating Javascript array with Model Array

To expand on the top-voted answer, for reference, if the you want to add more complex items to the array:

@:myArray.push(ClassMember1: "@d.ClassMember1", ClassMember2: "@d.ClassMember2");

etc.

Furthermore, if you want to pass the array as a parameter to your controller, you can stringify it first:

myArray = JSON.stringify({ 'myArray': myArray });

Best equivalent VisualStudio IDE for Mac to program .NET/C#

The question is quite old so I feel like I need to give a more up to date response to this question.

Based on MonoDevelop, the best IDE for building C# applications on the Mac, for pretty much any platform is http://xamarin.com/

Resize image proportionally with MaxHeight and MaxWidth constraints

Much longer solution, but accounts for the following scenarios:

Is the image smaller than the bounding box?
Is the Image and the Bounding Box square?
Is the Image square and the bounding box isn't
Is the image wider and taller than the bounding box
Is the image wider than the bounding box

Is the image taller than the bounding box

private Image ResizePhoto(FileInfo sourceImage, int desiredWidth, int desiredHeight)
{
    //throw error if bouning box is to small
    if (desiredWidth < 4 || desiredHeight < 4)
        throw new InvalidOperationException("Bounding Box of Resize Photo must be larger than 4X4 pixels.");            
    var original = Bitmap.FromFile(sourceImage.FullName);

    //store image widths in variable for easier use
    var oW = (decimal)original.Width;
    var oH = (decimal)original.Height;
    var dW = (decimal)desiredWidth;
    var dH = (decimal)desiredHeight;

    //check if image already fits
    if (oW < dW && oH < dH)
        return original; //image fits in bounding box, keep size (center with css) If we made it bigger it would stretch the image resulting in loss of quality.

    //check for double squares
    if (oW == oH && dW == dH)
    {
        //image and bounding box are square, no need to calculate aspects, just downsize it with the bounding box
        Bitmap square = new Bitmap(original, (int)dW, (int)dH);
        original.Dispose();
        return square;
    }

    //check original image is square
    if (oW == oH)
    {
        //image is square, bounding box isn't.  Get smallest side of bounding box and resize to a square of that center the image vertically and horizontally with Css there will be space on one side.
        int smallSide = (int)Math.Min(dW, dH);
        Bitmap square = new Bitmap(original, smallSide, smallSide);
        original.Dispose();
        return square;
    }

    //not dealing with squares, figure out resizing within aspect ratios            
    if (oW > dW && oH > dH) //image is wider and taller than bounding box
    {
        var r = Math.Min(dW, dH) / Math.Min(oW, oH); //two dimensions so figure out which bounding box dimension is the smallest and which original image dimension is the smallest, already know original image is larger than bounding box
        var nH = oH * r; //will downscale the original image by an aspect ratio to fit in the bounding box at the maximum size within aspect ratio.
        var nW = oW * r;
        var resized = new Bitmap(original, (int)nW, (int)nH);
        original.Dispose();
        return resized;
    }
    else
    {
        if (oW > dW) //image is wider than bounding box
        {
            var r = dW / oW; //one dimension (width) so calculate the aspect ratio between the bounding box width and original image width
            var nW = oW * r; //downscale image by r to fit in the bounding box...
            var nH = oH * r;
            var resized = new Bitmap(original, (int)nW, (int)nH);
            original.Dispose();
            return resized;
        }
        else
        {
            //original image is taller than bounding box
            var r = dH / oH;
            var nH = oH * r;
            var nW = oW * r;
            var resized = new Bitmap(original, (int)nW, (int)nH);
            original.Dispose();
            return resized;
        }
    }
}

How to connect to Oracle 11g database remotely

First, make sure the listener on database server (computer A) that receives client connection requests is running. To do so, run lsnrctl status command.

In case, if you get TNS:no listener message (see below image), it means listener service is not running. To start it, run lsnrctl start command.

Second, for database operations and connectivity from remote clients, the following executables must be added to the Windows Firewall exception list: (see image)

Oracle_home\bin\oracle.exe - Oracle Database executable

Oracle_home\bin\tnslsnr.exe - Oracle Listener

Finally, install oracle instant client on client machine (computer B) and run:

sqlplus user/password@computerA:port/XE

Replace part of a string with another string

If you want to do it quickly you can use a two scan approach. Pseudo code:

first parse. find how many matching chars.
expand the length of the string.
second parse. Start from the end of the string when we get a match we replace, else we just copy the chars from the first string.

I am not sure if this can be optimized to an in-place algo.

And a C++11 code example but I only search for one char.

#include <string>
#include <iostream>
#include <algorithm>
using namespace std;

void ReplaceString(string& subject, char search, const string& replace)
{   
    size_t initSize = subject.size();
    int count = 0;
    for (auto c : subject) { 
        if (c == search) ++count;
    }

    size_t idx = subject.size()-1 + count * replace.size()-1;
    subject.resize(idx + 1, '\0');

    string reverseReplace{ replace };
    reverse(reverseReplace.begin(), reverseReplace.end());  

    char *end_ptr = &subject[initSize - 1];
    while (end_ptr >= &subject[0])
    {
        if (*end_ptr == search) {
            for (auto c : reverseReplace) {
                subject[idx - 1] = c;
                --idx;              
            }           
        }
        else {
            subject[idx - 1] = *end_ptr;
            --idx;
        }
        --end_ptr;
    }
}

int main()
{
    string s{ "Mr John Smith" };
    ReplaceString(s, ' ', "%20");
    cout << s << "\n";

}

How to respond with HTTP 400 error in a Spring MVC @ResponseBody method returning String?

I would change the implementation slightly:

First, I create a UnknownMatchException:

@ResponseStatus(HttpStatus.NOT_FOUND)
public class UnknownMatchException extends RuntimeException {
    public UnknownMatchException(String matchId) {
        super("Unknown match: " + matchId);
    }
}

Note the use of @ResponseStatus, which will be recognized by Spring's ResponseStatusExceptionResolver. If the exception is thrown, it will create a response with the corresponding response status. (I also took the liberty of changing the status code to 404 - Not Found which I find more appropriate for this use case, but you can stick to HttpStatus.BAD_REQUEST if you like.)

Next, I would change the MatchService to have the following signature:

interface MatchService {
    public Match findMatch(String matchId);
}

Finally, I would update the controller and delegate to Spring's MappingJackson2HttpMessageConverter to handle the JSON serialization automatically (it is added by default if you add Jackson to the classpath and add either @EnableWebMvc or <mvc:annotation-driven /> to your config, see the reference docs):

@RequestMapping(value = "/matches/{matchId}", produces = MediaType.APPLICATION_JSON_VALUE)
@ResponseBody
public Match match(@PathVariable String matchId) {
    // throws an UnknownMatchException if the matchId is not known 
    return matchService.findMatch(matchId);
}

Note, it is very common to separate the domain objects from the view objects or DTO objects. This can easily be achieved by adding a small DTO factory that returns the serializable JSON object:

@RequestMapping(value = "/matches/{matchId}", produces = MediaType.APPLICATION_JSON_VALUE)
@ResponseBody
public MatchDTO match(@PathVariable String matchId) {
    Match match = matchService.findMatch(matchId);
    return MatchDtoFactory.createDTO(match);
}

Is SQL syntax case sensitive?

This isn't strictly SQL language, but in SQL Server if your database collation is case-sensitive, then all table names are case-sensitive.

How to track untracked content?

This worked out just fine for me:

git update-index --skip-worktree

If it doesn't work with the pathname, try the filename. Let me know if this worked for you too.

Bye!

pass kwargs argument to another function with kwargs

For #2 args will be only a formal parameter with dict value, but not a keyword type parameter.

If you want to pass a keyword type parameter into a keyword argument You need to specific ** before your dictionary, which means **args

check this out for more detail on using **kw

http://www.saltycrane.com/blog/2008/01/how-to-use-args-and-kwargs-in-python/

Download multiple files as a zip-file using php

This is a working example of making ZIPs in PHP:

$zip = new ZipArchive();
$zip_name = time().".zip"; // Zip name
$zip->open($zip_name,  ZipArchive::CREATE);
foreach ($files as $file) {
  echo $path = "uploadpdf/".$file;
  if(file_exists($path)){
  $zip->addFromString(basename($path),  file_get_contents($path));  
  }
  else{
   echo"file does not exist";
  }
}
$zip->close();

How to use IntelliJ IDEA to find all unused code?

Just use Analyze | Inspect Code with appropriate inspection enabled (Unused declaration under Declaration redundancy group).

Using IntelliJ 11 CE you can now "Analyze | Run Inspection by Name ... | Unused declaration"

Javascript dynamic array of strings

The following code creates an Array object called myCars:

var myCars=new Array();

There are two ways of adding values to an array (you can add as many values as you need to define as many variables you require).

var myCars=new Array();
myCars[0]="Saab";
myCars[1]="Volvo";
myCars[2]="BMW";

You could also pass an integer argument to control the array's size:

var myCars=new Array(3);
myCars[0]="Saab";
myCars[1]="Volvo";
myCars[2]="BMW";

var myCars=new Array("Saab","Volvo","BMW");

Note: If you specify numbers or true/false values inside the array then the type of variables will be numeric or Boolean instead of string.

Access an Array

You can refer to a particular element in an array by referring to the name of the array and the index number. The index number starts at 0.

The following code line:

document.write(myCars[0]);

will result in the following output:

Saab

Modify Values in an Array

To modify a value in an existing array, just add a new value to the array with a specified index number:

myCars[0]="Opel";

Now, the following code line:

document.write(myCars[0]);

will result in the following output:

Opel

How to change the date format of a DateTimePicker in vb.net

Use:

dateTimePicker.Value.ToString("yyyy/MM/dd")

Refer to the following link:

http://www.vbdotnetforums.com/schedule-time/15001-datetimepicker-format.html

Retrieving subfolders names in S3 bucket from boto3

Following is the piece of code that can handle pagination, if you are trying to fetch large number of S3 bucket objects:

def get_matching_s3_objects(bucket, prefix="", suffix=""):

    s3 = boto3.client("s3")
    paginator = s3.get_paginator("list_objects_v2")

    kwargs = {'Bucket': bucket}

    # We can pass the prefix directly to the S3 API.  If the user has passed
    # a tuple or list of prefixes, we go through them one by one.
    if isinstance(prefix, str):
        prefixes = (prefix, )
    else:
        prefixes = prefix

    for key_prefix in prefixes:
        kwargs["Prefix"] = key_prefix

        for page in paginator.paginate(**kwargs):
            try:
                contents = page["Contents"]
            except KeyError:
                return

            for obj in contents:
                key = obj["Key"]
                if key.endswith(suffix):
                    yield obj

Escape dot in a regex range

The dot operator . does not need to be escaped inside of a character class [].

How to add an element to a list?

I would do this:

data["list"].append({'b':'2'})

so simply you are adding an object to the list that is present in "data"

Hex to ascii string conversion

you need to take 2 (hex) chars at the same time... then calculate the int value and after that make the char conversion like...

char d = (char)intValue;

do this for every 2chars in the hex string

this works if the string chars are only 0-9A-F:

#include <stdio.h>
#include <string.h>

int hex_to_int(char c){
        int first = c / 16 - 3;
        int second = c % 16;
        int result = first*10 + second;
        if(result > 9) result--;
        return result;
}

int hex_to_ascii(char c, char d){
        int high = hex_to_int(c) * 16;
        int low = hex_to_int(d);
        return high+low;
}

int main(){
        const char* st = "48656C6C6F3B";
        int length = strlen(st);
        int i;
        char buf = 0;
        for(i = 0; i < length; i++){
                if(i % 2 != 0){
                        printf("%c", hex_to_ascii(buf, st[i]));
                }else{
                        buf = st[i];
                }
        }
}

MySQL & Java - Get id of the last inserted value (JDBC)

Wouldn't you just change:

numero = stmt.executeUpdate(query);

to:

numero = stmt.executeUpdate(query, Statement.RETURN_GENERATED_KEYS);

Take a look at the documentation for the JDBC Statement interface.

Update: Apparently there is a lot of confusion about this answer, but my guess is that the people that are confused are not reading it in the context of the question that was asked. If you take the code that the OP provided in his question and replace the single line (line 6) that I am suggesting, everything will work. The numero variable is completely irrelevant and its value is never read after it is set.

Is there a way to split a widescreen monitor in to two or more virtual monitors?

What about just using virtual desktops? You can spread your windows around among multiple workspaces. Something like Virtual Dimension should give you most of that functionality. I use virtual desktops all the time on Linux, and it's the next best thing to multiple monitors.

jQuery event for images loaded

Per jQuery's documentation, there are a number of caveats for using the load event with images. As noted in another answer, the ahpi.imgload.js plugin is broken, but the linked Paul Irish gist is no longer maintained.

Per Paul Irish, the canonical plugin for detecting image load complete events is now at:

https://github.com/desandro/imagesloaded

How to use code to open a modal in Angular 2?

Simply, npm install --save @types/bootstrap try to match typing version with your bootstrap version. E.g. you have Bootstrap 4.3.1 then npm install --save @types/[email protected]

How do I download the Android SDK without downloading Android Studio?

Navigate to the "Get just the command line tools" section of the android downloads page, and download the tools for your system.

For Windows:

Extract the contents to C:\Android\android-sdk

Navigate to C:\Android\android-sdk\tools\bin and open a command line window
(shift + right click)

Run the following to download the latest android package:

sdkmanager "platforms;android-25"

Update everything

sdkmanager --update

Other operation systems Do pretty much the same, but not using windows directories.

The sdkmanager page gives more info in to what commands to use to install your sdk.

How to escape comma and double quote at same time for CSV file?

You could also look at how Python writes Excel-compatible csv files.

I believe the default for Excel is to double-up for literal quote characters - that is, literal quotes " are written as "".

OpenCV resize fails on large image with "error: (-215) ssize.area() > 0 in function cv::resize"

Turns out I had a .csv file at the end of the folder from which I was reading all the images. Once I deleted that it worked alright

Make sure that it's all images and that you don't have any other type of file

Configure Apache .conf for Alias

Sorry not sure what was going on this worked in the end:

<VirtualHost *> 
    ServerName example.com
    DocumentRoot /var/www/html/mjp

    Alias /ncn "/var/www/html/ncn"

    <Directory "/var/www/html/ncn">
        Options None
        AllowOverride None
        Order allow,deny
        Allow from all
    </Directory>
</VirtualHost>

What replaces cellpadding, cellspacing, valign, and align in HTML5 tables?

/* cellpadding */
th, td { padding: 5px; }

/* cellspacing */
table { border-collapse: separate; border-spacing: 5px; } /* cellspacing="5" */
table { border-collapse: collapse; border-spacing: 0; }   /* cellspacing="0" */

/* valign */
th, td { vertical-align: top; }

/* align (center) */
table { margin: 0 auto; }

How to convert a command-line argument to int?

Since this answer was somehow accepted and thus will appear at the top, although it's not the best, I've improved it based on the other answers and the comments.

The C way; simplest, but will treat any invalid number as 0:

#include <cstdlib>

int x = atoi(argv[1]);

The C way with input checking:

#include <cstdlib>

errno = 0;
char *endptr;
long int x = strtol(argv[1], &endptr, 10);
if (endptr == argv[1]) {
  std::cerr << "Invalid number: " << argv[1] << '\n';
} else if (*endptr) {
  std::cerr << "Trailing characters after number: " << argv[1] << '\n';
} else if (errno == ERANGE) {
  std::cerr << "Number out of range: " << argv[1] << '\n';
}

The C++ iostreams way with input checking:

#include <sstream>

std::istringstream ss(argv[1]);
int x;
if (!(ss >> x)) {
  std::cerr << "Invalid number: " << argv[1] << '\n';
} else if (!ss.eof()) {
  std::cerr << "Trailing characters after number: " << argv[1] << '\n';
}

Alternative C++ way since C++11:

#include <stdexcept>
#include <string>

std::string arg = argv[1];
try {
  std::size_t pos;
  int x = std::stoi(arg, &pos);
  if (pos < arg.size()) {
    std::cerr << "Trailing characters after number: " << arg << '\n';
  }
} catch (std::invalid_argument const &ex) {
  std::cerr << "Invalid number: " << arg << '\n';
} catch (std::out_of_range const &ex) {
  std::cerr << "Number out of range: " << arg << '\n';
}

All four variants assume that argc >= 2. All accept leading whitespace; check isspace(argv[1][0]) if you don't want that. All except atoi reject trailing whitespace.

How do I get logs from all pods of a Kubernetes replication controller?

To build on the previous answer if you add -f you can tail the logs.

kubectl logs -f deployment/app

BOOLEAN or TINYINT confusion

As of MySql 5.1 version reference

BIT(M) =  approximately (M+7)/8 bytes, 
BIT(1) =  (1+7)/8 = 1 bytes (8 bits)

=========================================================================

TINYINT(1) take 8 bits.

https://dev.mysql.com/doc/refman/5.7/en/storage-requirements.html#data-types-storage-reqs-numeric

Why is the Java main method static?

main method always needs to be static because at RunTime JVM does not create any object to call main method and as we know in java static methods are the only methods which can be called using class name so main methods always needs to be static.

for more information visit this video :https://www.youtube.com/watch?v=Z7rPNwg-bfk&feature=youtu.be

Is there a free GUI management tool for Oracle Database Express?

You could try this: it's a very good tool, very fast and effective.

http://code.google.com/p/oracle-gui/

HTTPS setup in Amazon EC2

First, you need to open HTTPS port (443). To do that, you go to https://console.aws.amazon.com/ec2/ and click on the Security Groups link on the left, then create a new security group with also HTTPS available. Then, just update the security group of a running instance or create a new instance using that group.

After these steps, your EC2 work is finished, and it's all an application problem.

Splitting string into multiple rows in Oracle

Here is an alternative implementation using XMLTABLE that allows for casting to different data types:

select 
  xmltab.txt
from xmltable(
  'for $text in tokenize("a,b,c", ",") return $text'
  columns 
    txt varchar2(4000) path '.'
) xmltab
;

... or if your delimited strings are stored in one or more rows of a table:

select 
  xmltab.txt
from (
  select 'a;b;c' inpt from dual union all
  select 'd;e;f' from dual
) base
inner join xmltable(
  'for $text in tokenize($input, ";") return $text'
  passing base.inpt as "input"
  columns 
    txt varchar2(4000) path '.'
) xmltab
  on 1=1
;

How to extract the n-th elements from a list of tuples?

Using islice and chain.from_iterable:

>>> from itertools import chain, islice
>>> elements = [(1,1,1),(2,3,7),(3,5,10)]
>>> list(chain.from_iterable(islice(item, 1, 2) for item in elements))
[1, 3, 5]

This can be useful when you need more than one element:

>>> elements = [(0, 1, 2, 3, 4, 5), 
                (10, 11, 12, 13, 14, 15), 
                (20, 21, 22, 23, 24, 25)]
>>> list(chain.from_iterable(islice(tuple_, 2, 5) for tuple_ in elements))
[2, 3, 4, 12, 13, 14, 22, 23, 24]

Vector of Vectors to create matrix

I'm not familiar with c++, but a quick look at the documentation suggests that this should work:

//cin>>CC; cin>>RR; already done
vector<vector<int> > matrix;
for(int i = 0; i<RR; i++)
{
    vector<int> myvector;
    for(int j = 0; j<CC; j++)
    {
        int tempVal = 0;
        cout<<"Enter the number for Matrix 1";
        cin>>tempVal;
        myvector.push_back(tempVal);
    }
    matrix.push_back(myvector);
}

Git commit -a "untracked files"?

For others having the same problem, try running

git add . which will add all files of the current directory to track (including untracked) and then use

git commit -a to commit all tracked files.

As suggested by @Pacerier, one liner that does the same thing is

git add -A

Component based game engine design

There does seem to be a lack of information on the subject. I recently implemented this system, and I found a really good GDC Powerpoint that explained the details that are often left behind quite well. That document is here: Theory and Practice of Game Object Component Architecture

In addition to that Powerpoint, there are some good resources and various blogs. PurplePwny has a good discussion and links to some other resources. Ugly Baby Studios has a bit of a discussion around the idea of how components interact with each other. Good luck!

Passing argument to alias in bash

Usually when I want to pass arguments to an alias in Bash, I use a combination of an alias and a function like this, for instance:

function __t2d {                                                                
         if [ "$1x" != 'x' ]; then                                              
            date -d "@$1"                                                       
         fi                                                                     
} 

alias t2d='__t2d'

C compile : collect2: error: ld returned 1 exit status

Your problem is the typo in the function CreateDectionary().You should change it to CreateDictionary(). collect2: error: ld returned 1 exit status is the same problem in both C and C++, usually it means that you have unresolved symbols. In your case is the typo that i mentioned before.

Does Python support short-circuiting?

Short-circuiting behavior in operator `and`, `or`:

Let's first define a useful function to determine if something is executed or not. A simple function that accepts an argument, prints a message and returns the input, unchanged.

>>> def fun(i):
...     print "executed"
...     return i
...

One can observe the Python's short-circuiting behavior of and, or operators in the following example:

>>> fun(1)
executed
1
>>> 1 or fun(1)    # due to short-circuiting  "executed" not printed
1
>>> 1 and fun(1)   # fun(1) called and "executed" printed 
executed
1
>>> 0 and fun(1)   # due to short-circuiting  "executed" not printed 
0

Note: The following values are considered by the interpreter to mean false:

        False    None    0    ""    ()    []     {}

Short-circuiting behavior in function: `any()`, `all()`:

Python's any() and all() functions also support short-circuiting. As shown in the docs; they evaluate each element of a sequence in-order, until finding a result that allows an early exit in the evaluation. Consider examples below to understand both.

The function any() checks if any element is True. It stops executing as soon as a True is encountered and returns True.

>>> any(fun(i) for i in [1, 2, 3, 4])   # bool(1) = True
executed
True
>>> any(fun(i) for i in [0, 2, 3, 4])   
executed                               # bool(0) = False
executed                               # bool(2) = True
True
>>> any(fun(i) for i in [0, 0, 3, 4])
executed
executed
executed
True

The function all() checks all elements are True and stops executing as soon as a False is encountered:

>>> all(fun(i) for i in [0, 0, 3, 4])
executed
False
>>> all(fun(i) for i in [1, 0, 3, 4])
executed
executed
False

Short-circuiting behavior in Chained Comparison:

Additionally, in Python

Comparisons can be chained arbitrarily; for example, x < y <= z is equivalent to x < y and y <= z, except that y is evaluated only once (but in both cases z is not evaluated at all when x < y is found to be false).

>>> 5 > 6 > fun(3)    # same as:  5 > 6 and 6 > fun(3)
False                 # 5 > 6 is False so fun() not called and "executed" NOT printed
>>> 5 < 6 > fun(3)    # 5 < 6 is True 
executed              # fun(3) called and "executed" printed
True
>>> 4 <= 6 > fun(7)   # 4 <= 6 is True  
executed              # fun(3) called and "executed" printed
False
>>> 5 < fun(6) < 3    # only prints "executed" once
executed
False
>>> 5 < fun(6) and fun(6) < 3 # prints "executed" twice, because the second part executes it again
executed
executed
False

Edit:
One more interesting point to note :- Logical and, or operators in Python returns an operand's value instead of a Boolean (True or False). For example:

Operation x and y gives the result if x is false, then x, else y

^{Unlike in other languages e.g. &&, || operators in C that return either 0 or 1.}

Examples:

>>> 3 and 5    # Second operand evaluated and returned 
5                   
>>> 3  and ()
()
>>> () and 5   # Second operand NOT evaluated as first operand () is  false
()             # so first operand returned

Similarly or operator return left most value for which bool(value) == True else right most false value (according to short-circuiting behavior), examples:

>>> 2 or 5    # left most operand bool(2) == True
2    
>>> 0 or 5    # bool(0) == False and bool(5) == True
5
>>> 0 or ()
()

So, how is this useful? One example is given in Practical Python By Magnus Lie Hetland:
Let’s say a user is supposed to enter his or her name, but may opt to enter nothing, in which case you want to use the default value '<Unknown>'. You could use an if statement, but you could also state things very succinctly:

In [171]: name = raw_input('Enter Name: ') or '<Unknown>'
Enter Name: 

In [172]: name
Out[172]: '<Unknown>'

In other words, if the return value from raw_input is true (not an empty string), it is assigned to name (nothing changes); otherwise, the default '<Unknown>' is assigned to name.

How to get cookie's expire time

This is difficult to achieve, but the cookie expiration date can be set in another cookie. This cookie can then be read later to get the expiration date. Maybe there is a better way, but this is one of the methods to solve your problem.

Insert/Update/Delete with function in SQL Server

if you need to run the delete/insert/update you could also run dynamic statements. i.e.:

declare 
    @v_dynDelete                 NVARCHAR(500);

 SET @v_dynDelete = 'DELETE some_table;'; 
 EXEC @v_dynDelete

Scale an equation to fit exact page width

I just had the situation that I wanted this only for lines exceeding \linewidth, that is: Squeezing long lines slightly. Since it took me hours to figure this out, I would like to add it here.

I want to emphasize that scaling fonts in LaTeX is a deadly sin! In nearly every situation, there is a better way (e.g. multline of the mathtools package). So use it conscious.

In this particular case, I had no influence on the code base apart the preamble and some lines slightly overshooting the page border when I compiled it as an eBook-scaled pdf.

\usepackage{environ}         % provides \BODY
\usepackage{etoolbox}        % provides \ifdimcomp
\usepackage{graphicx}        % provides \resizebox

\newlength{\myl}
\let\origequation=\equation
\let\origendequation=\endequation

\RenewEnviron{equation}{
  \settowidth{\myl}{$\BODY$}                       % calculate width and save as \myl
  \origequation
  \ifdimcomp{\the\linewidth}{>}{\the\myl}
  {\ensuremath{\BODY}}                             % True
  {\resizebox{\linewidth}{!}{\ensuremath{\BODY}}}  % False
  \origendequation
}

Before After

CS0234: Mvc does not exist in the System.Web namespace

I tried all these answers, even closed Visual Studio and deleted all bin directories.

After starting it up again the MVC reference appeared to have a yellow exclamation mark on it, so I removed it and added it again.

Now it works, without copy local.

C# how to use enum with switch

 public enum Operator
    {
        PLUS, MINUS, MULTIPLY, DIVIDE
    }

    public class Calc
    {
        public void Calculate(int left, int right, Operator op)
        {

            switch (op)
            {
                case Operator.DIVIDE:
                    //Divide
                    break;
                case Operator.MINUS:
                    //Minus
                    break;
                case Operator.MULTIPLY:
                    //...
                    break;
                case Operator.PLUS:
                    //;;
                    break;
                default:
                    throw new InvalidOperationException("Couldn't process operation: " + op);
            }
        }
    }

Run batch file from Java code

Your code is fine, but the problem is inside the batch file.

You have to show the content of the bat file, your problem is in the paths inside the bat file.

What are the use cases for selecting CHAR over VARCHAR in SQL?

If you're working with me and you're working with Oracle, I would probably make you use varchar in almost every circumstance. The assumption that char uses less processing power than varchar may be true...for now...but database engines get better over time and this sort of general rule has the making of a future "myth".

Another thing: I have never seen a performance problem because someone decided to go with varchar. You will make much better use of your time writing good code (fewer calls to the database) and efficient SQL (how do indexes work, how does the optimizer make decisions, why is exists faster than in usually...).

Final thought: I have seen all sorts of problems with use of CHAR, people looking for '' when they should be looking for ' ', or people looking for 'FOO' when they should be looking for 'FOO (bunch of spaces here)', or people not trimming the trailing blanks, or bugs with Powerbuilder adding up to 2000 blanks to the value it returns from an Oracle procedure.

Programs & Examples On #Menuitem selection

How to dynamically change the color of the selected menu item of a web page?

Docker - Container is not running

HttpServletRequest - how to obtain the referring URL?

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

How do I add images in laravel view?

Shell script "for" loop syntax

how to set textbox value in jquery

PostgreSQL psql terminal command

mysql count group by having

How to stop/kill a query in postgresql?

jquery - fastest way to remove all rows from a very large table

How to check if array element is null to avoid NullPointerException in Java

CodeIgniter Select Query

How to position absolute inside a div?

Using grep and sed to find and replace a string

Optional Parameters in Web Api Attribute Routing

Reading a column from CSV file using JAVA

this in equals method

How to do a SOAP wsdl web services call from the command line

svn: E155004: ..(path of resource).. is already locked

I can't find my git.exe file in my Github folder

Resetting remote to a certain commit

How to do SVN Update on my project using the command line

Why does range(start, end) not include end?

Update Tkinter Label from variable

How do you add input from user into list in Python

How to copy file from one location to another location?

Have bash script answer interactive prompts

parseInt with jQuery

CALL command vs. START with /WAIT option

Get current domain

How do I prevent CSS inheritance?

How to execute raw queries with Laravel 5.1?

Show only two digit after decimal

Java substring: 'string index out of range'

How do I conditionally apply CSS styles in AngularJS?

Turn Pandas Multi-Index into column

How do I check if an index exists on a table field in MySQL?

React - Display loading screen while DOM is rendering?

How to include multiple js files using jQuery $.getScript() method

SCP Permission denied (publickey). on EC2 only when using -r flag on directories

No assembly found containing an OwinStartupAttribute Error

How to solve java.lang.NoClassDefFoundError?

Setting PHP tmp dir - PHP upload not working

Save the plots into a PDF

xlrd.biffh.XLRDError: Excel xlsx file; not supported

bootstrap datepicker change date event doesnt fire up when manually editing dates or clearing date

How can I force WebKit to redraw/repaint to propagate style changes?

How to get PID by process name?

How do I convert csv file to rdd

Create a List of primitive int?

What is the proper declaration of main in C++?

How to convert this var string to URL in Swift

How to set zoom level in google map

Git - Ignore node_modules folder everywhere

flutter run: No connected devices

Correct way to use Modernizr to detect IE?

What is the purpose of the single underscore "_" variable in Python?

Spring Boot how to hide passwords in properties file

How to make war file in Eclipse

[Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified

Which comment style should I use in batch files?

How to prevent rm from reporting that a file was not found?

How to get ID of clicked element with jQuery

Convert a String to a byte array and then back to the original String

C# Threading - How to start and stop a thread

Rollback a Git merge

What is the difference between a token and a lexeme?

Update div with jQuery ajax response html

Restore the mysql database from .frm files

The term 'Get-ADUser' is not recognized as the name of a cmdlet

EDIT

How to write console output to a txt file

HTTP Error 404 when running Tomcat from Eclipse

C++ Double Address Operator? (&&)

How to delete multiple values from a vector?

libclntsh.so.11.1: cannot open shared object file.

Difference between "enqueue" and "dequeue"

Google Map API v3 ~ Simply Close an infowindow?