SyntaxFix

Programs & Examples On #Nspanel

The NSPanel class implements a special kind of window (known as a panel), typically performing an auxiliary function.

Change the location of an object programmatically

The Location property has type Point which is a struct.

Instead of trying to modify the existing Point, try assigning a new Point object:

 this.balancePanel.Location = new Point(
     this.optionsPanel.Location.X,
     this.balancePanel.Location.Y
 );

How to Display Multiple Google Maps per page with API V3

I have just finished adding Google Maps to my company's CMS offering. My code allows for more than one map in a page.

Notes:

  • I use jQuery
  • I put the address in the content and then parse it out to dynamically generate the map
  • I include a Marker and an InfoWindow in my map

HTML:

<div class="block maps first">
    <div class="content">
        <div class="map_canvas">
            <div class="infotext">
                <div class="location">Middle East Bakery & Grocery</div>
                <div class="address">327 5th St</div>
                <div class="city">West Palm Beach</div>
                <div class="state">FL</div>
                <div class="zip">33401-3995</div>
                <div class="country">USA</div>
                <div class="phone">(561) 659-4050</div>
                <div class="zoom">14</div>
            </div>
        </div>
    </div>
</div>
<div class="block maps last">
    <div class="content">
        <div class="map_canvas">
            <div class="infotext">
                <div class="location">Global Design, Inc</div>
                <div class="address">3434 SW Ash Pl</div>
                <div class="city">Palm City</div>
                <div class="state">FL</div>
                <div class="zip">34990</div>
                <div class="country">USA</div>
                <div class="phone"></div>
                <div class="zoom">17</div>
            </div>
        </div>
    </div>
</div>

Code:

$(document).ready(function() {
    $maps = $('.block.maps .content .map_canvas');
    $maps.each(function(index, Element) {
        $infotext = $(Element).children('.infotext');

        var myOptions = {
            'zoom': parseInt($infotext.children('.zoom').text()),
            'mapTypeId': google.maps.MapTypeId.ROADMAP
        };
        var map;
        var geocoder;
        var marker;
        var infowindow;
        var address = $infotext.children('.address').text() + ', '
                + $infotext.children('.city').text() + ', '
                + $infotext.children('.state').text() + ' '
                + $infotext.children('.zip').text() + ', '
                + $infotext.children('.country').text()
        ;
        var content = '<strong>' + $infotext.children('.location').text() + '</strong><br />'
                + $infotext.children('.address').text() + '<br />'
                + $infotext.children('.city').text() + ', '
                + $infotext.children('.state').text() + ' '
                + $infotext.children('.zip').text()
        ;
        if (0 < $infotext.children('.phone').text().length) {
            content += '<br />' + $infotext.children('.phone').text();
        }

        geocoder = new google.maps.Geocoder();
        geocoder.geocode({'address': address}, function(results, status) {
            if (status == google.maps.GeocoderStatus.OK) {
                myOptions.center = results[0].geometry.location;
                map = new google.maps.Map(Element, myOptions);
                marker = new google.maps.Marker({
                    map: map,
                    position: results[0].geometry.location,
                    title: $infotext.children('.location').text()
                });
                infowindow = new google.maps.InfoWindow({'content': content});
                google.maps.event.addListener(map, 'tilesloaded', function(event) {
                    infowindow.open(map, marker);
                });
                google.maps.event.addListener(marker, 'click', function() {
                    infowindow.open(map, marker);
                });
            } else {
                alert('The address could not be found for the following reason: ' + status);
            }
        });
    });
});

Returning string from C function

word is on the stack and goes out of scope as soon as getStr() returns. You are invoking undefined behavior.

Why can't DateTime.ParseExact() parse "9/1/2009" using "M/d/yyyy"

Try 

Date.ParseExact("9/1/2009", "M/d/yyyy", new CultureInfo("en-US"))

How to open new browser window on button click event?

You can use some code like this, you can adjust a height and width as per your need

    protected void button_Click(object sender, EventArgs e)
    {
        // open a pop up window at the center of the page.
        ScriptManager.RegisterStartupScript(this, typeof(string), "OPEN_WINDOW", "var Mleft = (screen.width/2)-(760/2);var Mtop = (screen.height/2)-(700/2);window.open( 'your_page.aspx', null, 'height=700,width=760,status=yes,toolbar=no,scrollbars=yes,menubar=no,location=no,top=\'+Mtop+\', left=\'+Mleft+\'' );", true);
    }

How can get the text of a div tag using only javascript (no jQuery)

Because textContent is not supported in IE8 and older, here is a workaround:

var node = document.getElementById('test'),
var text  = node.textContent || node.innerText;
alert(text);

innerText does work in IE.

how to get date of yesterday using php?

You can also do this using Carbon library:

Carbon::yesterday()->format('d.m.Y');         // '26.03.2019'

In other formats:

Carbon::yesterday()->toDateString();          // '2019-03-26'
Carbon::yesterday()->toDateTimeString();      // '2019-03-26 00:00:00'

Carbon::yesterday()->toFormattedDateString(); // 'Mar 26, 2019'
Carbon::yesterday()->toDayDateTimeString();   // 'Tue, Mar 26, 2019 12:00 AM'

Get the current displaying UIViewController on the screen in AppDelegate.m

Specify title to each ViewController and then get the title of current ViewController by the code given below.

-(void)viewDidUnload {
  NSString *currentController = self.navigationController.visibleViewController.title;

Then check it by your title like this

  if([currentController isEqualToString:@"myViewControllerTitle"]){
    //write your code according to View controller.
  }
}

What is the full path to the Packages folder for Sublime text 2 on Mac OS Lion

1. Solution

Open Sublime Text console ? paste in opened field:

sublime.packages_path()

? Enter. You get result in console output.

2. Relevance

This answer is relevant for April 2018. In the future, the data of this answer may be obsolete.

3. Not recommended

I'm not recommended @osiris answer. Arguments:

  1. In new versions of Sublime Text and/or operating systems (e.g. Sublime Text 4, macOS 14) paths may be changed.
  2. It doesn't take portable Sublime Text on Windows. In portable Sublime Text on Windows another path of Packages folder.
  3. It less simple.

4. Additional link

How to read and write xml files?

SAX parser is working differently with a DOM parser, it neither load any XML document into memory nor create any object representation of the XML document. Instead, the SAX parser use callback function org.xml.sax.helpers.DefaultHandler to informs clients of the XML document structure.

SAX Parser is faster and uses less memory than DOM parser. See following SAX callback methods :

startDocument() and endDocument() – Method called at the start and end of an XML document. startElement() and endElement() – Method called at the start and end of a document element. characters() – Method called with the text contents in between the start and end tags of an XML document element.

  1. XML file

Create a simple XML file.

<?xml version="1.0"?>
<company>
    <staff>
        <firstname>yong</firstname>
        <lastname>mook kim</lastname>
        <nickname>mkyong</nickname>
        <salary>100000</salary>
    </staff>
    <staff>
        <firstname>low</firstname>
        <lastname>yin fong</lastname>
        <nickname>fong fong</nickname>
        <salary>200000</salary>
    </staff>
</company>
  1. XML parser:

Java file Use SAX parser to parse the XML file.

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

public class ReadXMLFile {
    public static void main(String argv[]) {

        try {
            SAXParserFactory factory = SAXParserFactory.newInstance();
            SAXParser saxParser = factory.newSAXParser();

            DefaultHandler handler = new DefaultHandler() {
                boolean bfname = false;
                boolean blname = false;
                boolean bnname = false;
                boolean bsalary = false;

                public void startElement(String uri, String localName,String qName, 
                            Attributes attributes) throws SAXException {

                    System.out.println("Start Element :" + qName);

                    if (qName.equalsIgnoreCase("FIRSTNAME")) {
                        bfname = true;
                    }

                    if (qName.equalsIgnoreCase("LASTNAME")) {
                        blname = true;
                    }

                    if (qName.equalsIgnoreCase("NICKNAME")) {
                        bnname = true;
                    }

                    if (qName.equalsIgnoreCase("SALARY")) {
                        bsalary = true;
                    }

                }

                public void endElement(String uri, String localName,
                    String qName) throws SAXException {

                    System.out.println("End Element :" + qName);

                }

                public void characters(char ch[], int start, int length) throws SAXException {

                    if (bfname) {
                        System.out.println("First Name : " + new String(ch, start, length));
                        bfname = false;
                    }

                    if (blname) {
                        System.out.println("Last Name : " + new String(ch, start, length));
                        blname = false;
                    }

                    if (bnname) {
                        System.out.println("Nick Name : " + new String(ch, start, length));
                        bnname = false;
                    }

                    if (bsalary) {
                        System.out.println("Salary : " + new String(ch, start, length));
                        bsalary = false;
                    }

                }

            };

            saxParser.parse("c:\\file.xml", handler);

        } catch (Exception e) {
           e.printStackTrace();
        }

    }

}

Result

Start Element :company
Start Element :staff
Start Element :firstname
First Name : yong
End Element :firstname
Start Element :lastname
Last Name : mook kim
End Element :lastname
Start Element :nickname
Nick Name : mkyong
End Element :nickname
and so on...

Source(MyKong) - http://www.mkyong.com/java/how-to-read-xml-file-in-java-sax-parser/

Display string as html in asp.net mvc view

You should be using IHtmlString instead:

IHtmlString str = new HtmlString("<a href="/Home/Profile/seeker">seeker</a> has applied to <a href="/Jobs/Details/9">Job</a> floated by you.</br>");

Whenever you have model properties or variables that need to hold HTML, I feel this is generally a better practice. First of all, it is a bit cleaner. For example:

@Html.Raw(str)

Compared to:

@str

Also, I also think it's a bit safer vs. using @Html.Raw(), as the concern of whether your data is HTML is kept in your controller. In an environment where you have front-end vs. back-end developers, your back-end developers may be more in tune with what data can hold HTML values, thus keeping this concern in the back-end (controller).

I generally try to avoid using Html.Raw() whenever possible.

One other thing worth noting, is I'm not sure where you're assigning str, but a few things that concern me with how you may be implementing this.

First, this should be done in a controller, regardless of your solution (IHtmlString or Html.Raw). You should avoid any logic like this in your view, as it doesn't really belong there.

Additionally, you should be using your ViewModel for getting values to your view (and again, ideally using IHtmlString as the property type). Seeing something like @Html.Encode(str) is a little concerning, unless you were doing this just to simplify your example.

How can I install a local gem?

Also, you can use gem install --local path_to_gem/filename.gem

This will skip the usual gem repository scan that happens when you leave off --local.

You can find other magic with gem install --help.

How do I check if an object has a key in JavaScript?

Try the JavaScript in operator.

if ('key' in myObj)

And the inverse.

if (!('key' in myObj))

Be careful! The in operator matches all object keys, including those in the object's prototype chain.

Use myObj.hasOwnProperty('key') to check an object's own keys and will only return true if key is available on myObj directly:

myObj.hasOwnProperty('key')

Unless you have a specific reason to use the in operator, using myObj.hasOwnProperty('key') produces the result most code is looking for.

How should I throw a divide by zero exception in Java without actually dividing by zero?

There are two ways you could do this. Either create your own custom exception class to represent a divide by zero error or throw the same type of exception the java runtime would throw in this situation.

Define custom exception

public class DivideByZeroException() extends ArithmeticException {
}

Then in your code you would check for a divide by zero and throw this exception:

if (divisor == 0) throw new DivideByZeroException();

Throw ArithmeticException

Add to your code the check for a divide by zero and throw an arithmetic exception:

if (divisor == 0) throw new java.lang.ArithmeticException("/ by zero");

Additionally, you could consider throwing an illegal argument exception since a divisor of zero is an incorrect argument to pass to your setKp() method:

if (divisor == 0) throw new java.lang.IllegalArgumentException("divisor == 0");

Spring profiles and testing

@EnableConfigurationProperties needs to be there (you also can annotate your test class), the application-localtest.yml from test/resources will be loaded. A sample with jUnit5

@ExtendWith(SpringExtension.class)
@EnableConfigurationProperties
@ContextConfiguration(classes = {YourClasses}, initializers = ConfigFileApplicationContextInitializer.class)
@ActiveProfiles(profiles = "localtest")
class TestActiveProfile {

    @Test
    void testActiveProfile(){

    }
}

Convert array of indices to 1-hot encoded numpy array
  • p will be a 2d ndarray.
  • We want to know which value is the highest in a row, to put there 1 and everywhere else 0.

clean and easy solution:

max_elements_i = np.expand_dims(np.argmax(p, axis=1), axis=1)
one_hot = np.zeros(p.shape)
np.put_along_axis(one_hot, max_elements_i, 1, axis=1)

What does the function then() mean in JavaScript?

Another example:

_x000D_
_x000D_ 
new Promise(function(ok) {
   ok( 
      /* myFunc1(param1, param2, ..) */
   )
}).then(function(){
     /* myFunc1 succeed */
     /* Launch something else */
     /* console.log(whateverparam1) */
     /* myFunc2(whateverparam1, otherparam, ..) */
}).then(function(){
     /* myFunc2 succeed */
     /* Launch something else */
     /* myFunc3(whatever38, ..) */
})
_x000D_
_x000D_
_x000D_

The same logic using arrow functions shorthand.

?? This can cause issues with multiple calls see comments!

The syntax of the first snippet using plain function is preferable here.

_x000D_
_x000D_ 
new Promise((ok) =>
   ok( 
      /* myFunc1(param1, param2, ..) */
)).then(() =>
     /* myFunc1 succeed */
     /* Launch something else */
     /* Only ONE call or statment can be made inside arrow functions */
     /* For example, using console.log here will break everything */
     /* myFunc2(whateverparam1, otherparam, ..) */
).then(() =>
     /* myFunc2 succeed */
     /* Launch something else */
     /* Only ONE call or statment can be made inside arrow functions */
     /* For example, using console.log here will break everything */
     /* myFunc3(whatever38, ..) */
)
_x000D_
_x000D_
_x000D_

Visual Studio 2015 installer hangs during install?

Same thing happened to me, and I also tried to terminate secondary process from task manager. Do not do that. It is not a solution, but rather a hack which may cause issues later. In my case, I was not even able to uninstall Visual Studio. I tried both web installation and ISO, same issue.

Here is how it worked finally. I restored my Windows 7 to earliest restore point as possible, when there was nothing installed, so I was sure that there would be no conflicts between the different tools (Java, Android API, etc.)

I started the installation of Visual Studio 2015 Community Release Candidate at 10 p.m. At 7 a.m., it was working on Android API 19-21. A hour later, it was finally preparing Visual Studio.

This means that all you need to do is to actually wait 8 to 9 hours. Don't terminate the secondary installer at risk of breaking your Visual Studio; just wait.

WCF on IIS8; *.svc handler mapping doesn't work

turn ON the following on 'Turn Windows Features on or off'

a) .Net Framework 3.5 - WCF HTTP Activation and Non-Http Activation

b) all under WCF Services

What's the CMake syntax to set and use variables?

$ENV{FOO} for usage, where FOO is being picked up from the environment variable. otherwise use as ${FOO}, where FOO is some other variable. For setting, SET(FOO "foo") would be used in CMake.

How do I include a pipe | in my linux find -exec command?

 
find . -name "file_*" -follow -type f -print0 | xargs -0 zcat | agrep -dEOE 'grep'

TypeError: not all arguments converted during string formatting python

For me, This error was caused when I was attempting to pass in a tuple into the string format method.

I found the solution from this question/answer

Copying and pasting the correct answer from the link (NOT MY WORK):

>>> thetuple = (1, 2, 3)
>>> print "this is a tuple: %s" % (thetuple,)
this is a tuple: (1, 2, 3)

Making a singleton tuple with the tuple of interest as the only item, i.e. the (thetuple,) part, is the key bit here.

Best implementation for Key Value Pair Data Structure?

There is an actual Data Type called KeyValuePair, use like this

KeyValuePair<string, string> myKeyValuePair = new KeyValuePair<string,string>("defaultkey", "defaultvalue");

Using async/await with a forEach loop

Here are some forEachAsync prototypes. Note you'll need to await them:

Array.prototype.forEachAsync = async function (fn) {
    for (let t of this) { await fn(t) }
}

Array.prototype.forEachAsyncParallel = async function (fn) {
    await Promise.all(this.map(fn));
}

Note while you may include this in your own code, you should not include this in libraries you distribute to others (to avoid polluting their globals).

MySQL: ERROR 1227 (42000): Access denied - Cannot CREATE USER

First thing to do is run this:

SHOW GRANTS;

You will quickly see you were assigned the anonymous user to authenticate into mysql.

Instead of logging into mysql with

mysql

login like this:

mysql -uroot

By default, root@localhost has all rights and no password.

If you cannot login as root without a password, do the following:

Step 01) Add the two options in the mysqld section of my.ini:

[mysqld]
skip-grant-tables
skip-networking

Step 02) Restart mysql

net stop mysql
<wait 10 seconds>
net start mysql

Step 03) Connect to mysql

mysql

Step 04) Create a password from root@localhost

UPDATE mysql.user SET password=password('whateverpasswordyoulike')
WHERE user='root' AND host='localhost';
exit

Step 05) Restart mysql

net stop mysql
<wait 10 seconds>
net start mysql

Step 06) Login as root with password

mysql -u root -p

You should be good from there.

CAVEAT: Please remove anonymous users !!!

How can I get selector from jQuery object

http://www.selectorgadget.com/ is a bookmarklet designed explicitly for this use case.

That said, I agree with most other people in that you should just learn CSS selectors yourself, trying to generate them with code is not sustainable. :)

This action could not be completed. Try Again (-22421)

Uncheck "Include bitcode" box, worked for me.

Invoking a PHP script from a MySQL trigger

If you have transaction logs in you MySQL, you can create a trigger for purpose of a log instance creation. A cronjob could monitor this log and based on events created by your trigger it could invoke a php script. That is if you absolutely have no control over you insertion.

Can I change the headers of the HTTP request sent by the browser?

Use some javascript!

xmlhttp=new XMLHttpRequest();
xmlhttp.open('PUT',http://www.mydomain.org/documents/standards/browsers/supportlist)
xmlhttp.send("page content goes here");

Verifying a specific parameter with Moq

If the verification logic is non-trivial, it will be messy to write a large lambda method (as your example shows). You could put all the test statements in a separate method, but I don't like to do this because it disrupts the flow of reading the test code.

Another option is to use a callback on the Setup call to store the value that was passed into the mocked method, and then write standard Assert methods to validate it. For example:

// Arrange
MyObject saveObject;
mock.Setup(c => c.Method(It.IsAny<int>(), It.IsAny<MyObject>()))
        .Callback<int, MyObject>((i, obj) => saveObject = obj)
        .Returns("xyzzy");

// Act
// ...

// Assert
// Verify Method was called once only
mock.Verify(c => c.Method(It.IsAny<int>(), It.IsAny<MyObject>()), Times.Once());
// Assert about saveObject
Assert.That(saveObject.TheProperty, Is.EqualTo(2));

How to rebuild docker container in docker-compose.yml?

For me it only fetched new dependencies from Docker Hub with both --no-cache and --pull (which are available for docker-compose build. 

# other steps before rebuild
docker-compose build --no-cache --pull nginx # rebuild nginx
# other steps after rebuild, e.g. up (see other answers)

Javascript Error Null is not an Object

I agree with alex about making sure the DOM is loaded. I also think that the submit button will trigger a refresh.

This is what I would do

<html>
<head>
<title>webpage</title>
</head>
<script type="text/javascript">
var myButton;
var myTextfield;

function setup() {
  myButton = document.getElementById("myButton");
  myTextfield = document.getElementById("myTextfield");
  myButton.onclick = function() {
    var userName = myTextfield.value;
    greetUser(userName);
    return false;
  }
}

function greetUser(userName) {
  var greeting = "Hello " + userName + "!";
  document.getElementsByTagName("h2")[0].innerHTML = greeting;
}

</script>
<body onload="setup()">
  <h2>Hello World!</h2>
  <p id="myParagraph">This is an example website</p>

  <form>
    <input type="text" id="myTextfield" placeholder="Type your name" />
    <input type="button" id="myButton" value="Go" />
  </form>
  </body>
</html>

have fun!

How can I determine if a date is between two dates in Java?

This might be a bit more readable:

Date min, max;   // assume these are set to something
Date d;          // the date in question

return d.after(min) && d.before(max);

Adding new column to existing DataFrame in Python pandas

Use the original df1 indexes to create the series:

df1['e'] = pd.Series(np.random.randn(sLength), index=df1.index)

Edit 2015
Some reported getting the SettingWithCopyWarning with this code.
However, the code still runs perfectly with the current pandas version 0.16.1.

>>> sLength = len(df1['a'])
>>> df1
          a         b         c         d
6 -0.269221 -0.026476  0.997517  1.294385
8  0.917438  0.847941  0.034235 -0.448948

>>> df1['e'] = pd.Series(np.random.randn(sLength), index=df1.index)
>>> df1
          a         b         c         d         e
6 -0.269221 -0.026476  0.997517  1.294385  1.757167
8  0.917438  0.847941  0.034235 -0.448948  2.228131

>>> p.version.short_version
'0.16.1'

The SettingWithCopyWarning aims to inform of a possibly invalid assignment on a copy of the Dataframe. It doesn't necessarily say you did it wrong (it can trigger false positives) but from 0.13.0 it let you know there are more adequate methods for the same purpose. Then, if you get the warning, just follow its advise: Try using .loc[row_index,col_indexer] = value instead

>>> df1.loc[:,'f'] = pd.Series(np.random.randn(sLength), index=df1.index)
>>> df1
          a         b         c         d         e         f
6 -0.269221 -0.026476  0.997517  1.294385  1.757167 -0.050927
8  0.917438  0.847941  0.034235 -0.448948  2.228131  0.006109
>>>

In fact, this is currently the more efficient method as described in pandas docs

Edit 2017

As indicated in the comments and by @Alexander, currently the best method to add the values of a Series as a new column of a DataFrame could be using assign:

df1 = df1.assign(e=pd.Series(np.random.randn(sLength)).values)

Angular HttpPromise: difference between `success`/`error` methods and `then`'s arguments

.then() is chainable and will wait for previous .then() to resolve.

.success() and .error() can be chained, but they will all fire at once (so not much point to that)

.success() and .error() are just nice for simple calls (easy makers):

$http.post('/getUser').success(function(user){ 
   ... 
})

so you don't have to type this:

$http.post('getUser').then(function(response){
  var user = response.data;
})

But generally i handler all errors with .catch():

$http.get(...)
    .then(function(response){ 
      // successHandler
      // do some stuff
      return $http.get('/somethingelse') // get more data
    })
    .then(anotherSuccessHandler)
    .catch(errorHandler)

If you need to support <= IE8 then write your .catch() and .finally() like this (reserved methods in IE):

    .then(successHandler)
    ['catch'](errorHandler)

Working Examples:

Here's something I wrote in more codey format to refresh my memory on how it all plays out with handling errors etc:

http://jsfiddle.net/nalberg/v95tekz2/

ORA-30926: unable to get a stable set of rows in the source tables

I was not able to resolve this after several hours. Eventually I just did a select with the two tables joined, created an extract and created individual SQL update statements for the 500 rows in the table. Ugly but beats spending hours trying to get a query to work.

What is PECS (Producer Extends Consumer Super)?

Using real life example (with some simplifications):

  1. Imagine a freight train with freight cars as analogy to a list.
  2. You can put a cargo in a freight car if the cargo has the same or smaller size than the freight car = <? super FreightCarSize>
  3. You can unload a cargo from a freight car if you have enough place (more than the size of the cargo) in your depot = <? extends DepotSize>

Android findViewById() in Custom View

Change your Method as following and check it will work

private void initViews() {
    inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    inflater.inflate(R.layout.id_number_edit_text_custom, this, true);
    View view = (View) inflater.inflate(R.layout.main, null);
    editText = (EditText) view.findViewById(R.id.id_number_custom);
    loadButton = (ImageButton) view.findViewById(R.id.load_data_button);
    loadButton.setVisibility(RelativeLayout.INVISIBLE);
    loadData();
}

git remove merge commit from history

Starting with the repo in the original state

Original repo history

To remove the merge commit and squash the branch into a single commit in the mainline

Squashed commits, no merge commit

Use these commands (replacing 5 and 1 with the SHAs of the corresponding commits):

git checkout 5
git reset --soft 1
git commit --amend -m '1 2 3 4 5'
git rebase HEAD master

To retain a merge commit but squash the branch commits into one:

Squashed commits, retained merge commit

Use these commands (replacing 5, 1 and C with the SHAs of the corresponding commits):

git checkout -b tempbranch 5
git reset --soft 1
git commit --amend -m '1 2 3 4 5'
git checkout C
git merge --no-ff tempbranch
git rebase HEAD master

To remove the merge commit and replace it with individual commits from the branch

Branch moved into mainline, no merge commit

Just do (replacing 5 with the SHA of the corresponding commit):

git rebase 5 master

And finally, to remove the branch entirely

Branch removed entirely

Use this command (replacing C and D with the SHAs of the corresponding commits):

git rebase --onto C D~ master

Reverse order of foreach list items

If you don't mind destroying the array (or a temp copy of it) you can do:

$stack = array("orange", "banana", "apple", "raspberry");

while ($fruit = array_pop($stack)){
    echo $fruit . "\n<br>"; 
}

produces:

raspberry 
apple 
banana 
orange

I think this solution reads cleaner than fiddling with an index and you are less likely to introduce index handling mistakes, but the problem with it is that your code will likely take slightly longer to run if you have to create a temporary copy of the array first. Fiddling with an index is likely to run faster, and it may also come in handy if you actually need to reference the index, as in:

$stack = array("orange", "banana", "apple", "raspberry");
$index = count($stack) - 1;
while($index > -1){
    echo $stack[$index] ." is in position ". $index . "\n<br>";
    $index--;
}

But as you can see, you have to be very careful with the index...

Use CASE statement to check if column exists in table - SQL Server

 
select case
         when exists (SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'Tags' AND COLUMN_NAME = 'ModifiedByUser')
         then 0
         else 1
       end

How to use CURL via a proxy?

I have explained use of various CURL options required for CURL PROXY.

$url = 'http://dynupdate.no-ip.com/ip.php';
$proxy = '127.0.0.1:8888';
$proxyauth = 'user:password';

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);         // URL for CURL call
curl_setopt($ch, CURLOPT_PROXY, $proxy);     // PROXY details with port
curl_setopt($ch, CURLOPT_PROXYUSERPWD, $proxyauth);   // Use if proxy have username and password
curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5); // If expected to call with specific PROXY type
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);  // If url has redirects then go to the final redirected URL.
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);  // Do not outputting it out directly on screen.
curl_setopt($ch, CURLOPT_HEADER, 1);   // If you want Header information of response else make 0
$curl_scraped_page = curl_exec($ch);
curl_close($ch);

echo $curl_scraped_page;

Taking the record with the max date

If date and col_date are the same columns you should simply do:

SELECT A, MAX(date) FROM t GROUP BY A

Why not use:

WITH x AS ( SELECT A, MAX(col_date) m FROM TABLENAME )
SELECT A, date FROM TABLENAME t JOIN x ON x.A = t.A AND x.m = t.col_date

Otherwise:

SELECT A, FIRST_VALUE(date) KEEP(dense_rank FIRST ORDER BY col_date DESC)
  FROM TABLENAME
 GROUP BY A

data.table vs dplyr: can one do something well the other can't or does poorly?

In direct response to the Question Title...

dplyr definitely does things that data.table can not.

Your point #3

dplyr abstracts (or will) potential DB interactions

is a direct answer to your own question but isn't elevated to a high enough level. dplyr is truly an extendable front-end to multiple data storage mechanisms where as data.table is an extension to a single one.

Look at dplyr as a back-end agnostic interface, with all of the targets using the same grammer, where you can extend the targets and handlers at will. data.table is, from the dplyr perspective, one of those targets.

You will never (I hope) see a day that data.table attempts to translate your queries to create SQL statements that operate with on-disk or networked data stores.

dplyr can possibly do things data.table will not or might not do as well.

Based on the design of working in-memory, data.table could have a much more difficult time extending itself into parallel processing of queries than dplyr.

In response to the in-body questions...

Usage

Are there analytical tasks that are a lot easier to code with one or the other package for people familiar with the packages (i.e. some combination of keystrokes required vs. required level of esotericism, where less of each is a good thing).

This may seem like a punt but the real answer is no. People familiar with tools seem to use the either the one most familiar to them or the one that is actually the right one for the job at hand. With that being said, sometimes you want to present a particular readability, sometimes a level of performance, and when you have need for a high enough level of both you may just need another tool to go along with what you already have to make clearer abstractions.

Performance

Are there analytical tasks that are performed substantially (i.e. more than 2x) more efficiently in one package vs. another.

Again, no. data.table excels at being efficient in everything it does where dplyr gets the burden of being limited in some respects to the underlying data store and registered handlers.

This means when you run into a performance issue with data.table you can be pretty sure it is in your query function and if it is actually a bottleneck with data.table then you've won yourself the joy of filing a report. This is also true when dplyr is using data.table as the back-end; you may see some overhead from dplyr but odds are it is your query.

When dplyr has performance issues with back-ends you can get around them by registering a function for hybrid evaluation or (in the case of databases) manipulating the generated query prior to execution.

Also see the accepted answer to when is plyr better than data.table?

How to get 'System.Web.Http, Version=5.2.3.0?

In Package Manager Console

Install-Package Microsoft.AspNet.WebApi.Core -version 5.2.3

Hiding a password in a python script (insecure obfuscation only)

Here is a simple method:

  1. Create a python module - let's call it peekaboo.py.
  2. In peekaboo.py, include both the password and any code needing that password
  3. Create a compiled version - peekaboo.pyc - by importing this module (via python commandline, etc...).
  4. Now, delete peekaboo.py.
  5. You can now happily import peekaboo relying only on peekaboo.pyc. Since peekaboo.pyc is byte compiled it is not readable to the casual user.

This should be a bit more secure than base64 decoding - although it is vulnerable to a py_to_pyc decompiler.

How do I make Java register a string input with spaces?

Instead of

Scanner in = new Scanner(System.in);
String question;
question = in.next();

Type in 

Scanner in = new Scanner(System.in);
String question;
question = in.nextLine();

This should be able to take spaces as input.

Convert this string to datetime

Use DateTime::createFromFormat

$date = date_create_from_format('d/m/Y:H:i:s', $s);
$date->getTimestamp();

Are there other whitespace codes like &nbsp for half-spaces, em-spaces, en-spaces etc useful in HTML?

There are codes for other space characters, and the codes as such work well, but the characters themselves are legacy character. They have been included into character sets only due to their presence in existing character data, rather than for use in new documents. For some combinations of font and browser version, they may cause a generic glyph of unrepresentable character to be shown. For details, check my page about Unicode spaces.

So using CSS is safer and lets you specify any desired amount of spacing, not just the specific widths of fixed-width spaces. If you just want to have added spacing around your h2 elements, as it seems to me, then setting padding on those elements (changing the value of the padding: 0 settings that you already have) should work fine.

Invalid attempt to read when no data is present

You have to call DataReader.Read to fetch the result:

SqlDataReader dr = cmd10.ExecuteReader();
if (dr.Read()) 
{
    // read data for first record here
}

DataReader.Read() returns a bool indicating if there are more blocks of data to read, so if you have more than 1 result, you can do:

while (dr.Read()) 
{
    // read data for each record here
}

How to run function of parent window when child window closes?

You can somehow try this:

Spawned window: 

window.onunload = function (e) {
    opener.somefunction(); //or
    opener.document.getElementById('someid').innerHTML = 'update content of parent window';
};

Parent Window:

window.open('Spawn.htm','');
window.somefunction = function(){

}

You should not do this on the parent, otherwise opener.somefunction() will not work, doing window.somefunction makes somefunction as public:

function somefunction(){

}

HTML form readonly SELECT tag/input

very simple. First store value in variable. Then on change event set value to stored variable that holds initial value of

I have a whose name is mapping. Then my code will be as follows;

$("document").ready(function(){ 
    var mapping=$("select[name=mapping]").val();
    $("select[name=mapping]").change(function(){
        $("select[name=mapping]").val(mapping);
    });
});

List Git commits not pushed to the origin yet

how to determine if a commit with particular hash have been pushed to the origin already?

# list remote branches that contain $commit
git branch -r --contains $commit

Insert multiple lines into a file after specified pattern using shell script

Using GNU sed:

sed "/cdef/aline1\nline2\nline3\nline4" input.txt

If you started with:

abcd
accd
cdef
line
web

this would produce:

abcd
accd
cdef
line1
line2
line3
line4
line
web

If you want to save the changes to the file in-place, say:

sed -i "/cdef/aline1\nline2\nline3\nline4" input.txt

Histogram using gnuplot?

I have a couple corrections/additions to Born2Smile's very useful answer:

  1. Empty bins caused the box for the adjacent bin to incorrectly extend into its space; avoid this using set boxwidth binwidth
  2. In Born2Smile's version, bins are rendered as centered on their lower bound. Strictly they ought to extend from the lower bound to the upper bound. This can be corrected by modifying the bin function: bin(x,width)=width*floor(x/width) + width/2.0

How to get body of a POST in php?

A possible reason for an empty $_POST is that the request is not POST, or not POST anymore... It may have started out as post, but encountered a 301 or 302 redirect somewhere, which is switched to GET!

Inspect $_SERVER['REQUEST_METHOD'] to check if this is the case.

See https://stackoverflow.com/a/19422232/109787 for a good discussion of why this should not happen but still does.

How to catch and print the full exception traceback without halting/exiting the program?

If you have an Error object already, and you want to print the whole thing, you need to make this slightly awkward call:

import traceback
traceback.print_exception(type(err), err, err.__traceback__)

That's right, print_exception takes three positional arguments: The type of the exception, the actual exception object, and the exception's own internal traceback property.

In python 3.5 or later, the type(err) is optional... but it's a positional argument, so you still have to explicitly pass None in its place.

traceback.print_exception(None, err, err.__traceback__)

I have no idea why all of this isn't just traceback.print_exception(err). Why you would ever want to print out an error, along with a traceback other than the one that belongs to that error, is beyond me.

Python Timezone conversion

To convert a time in one timezone to another timezone in Python, you could use datetime.astimezone():

time_in_new_timezone = time_in_old_timezone.astimezone(new_timezone)

Given aware_dt (a datetime object in some timezone), to convert it to other timezones and to print the times in a given time format:

#!/usr/bin/env python3
import pytz  # $ pip install pytz

time_format = "%Y-%m-%d %H:%M:%S%z"
tzids = ['Asia/Shanghai', 'Europe/London', 'America/New_York']
for tz in map(pytz.timezone, tzids):
    time_in_tz = aware_dt.astimezone(tz)
    print(f"{time_in_tz:{time_format}}")

If f"" syntax is unavailable, you could replace it with "".format(**vars())

where you could set aware_dt from the current time in the local timezone:

from datetime import datetime
import tzlocal  # $ pip install tzlocal

local_timezone = tzlocal.get_localzone()
aware_dt = datetime.now(local_timezone) # the current time

Or from the input time string in the local timezone:

naive_dt = datetime.strptime(time_string, time_format)
aware_dt = local_timezone.localize(naive_dt, is_dst=None)

where time_string could look like: '2016-11-19 02:21:42'. It corresponds to time_format = '%Y-%m-%d %H:%M:%S'.

is_dst=None forces an exception if the input time string corresponds to a non-existing or ambiguous local time such as during a DST transition. You could also pass is_dst=False, is_dst=True. See links with more details at Python: How do you convert datetime/timestamp from one timezone to another timezone?

What are MVP and MVC and what is the difference?

My humble short view: MVP is for large scales, and MVC for tiny scales. With MVC, I sometime feel the V and the C may be seen a two sides of a single indivisible component rather directly bound to M, and one inevitably falls to this when going down-to shorter scales, like UI controls and base widgets. At this level of granularity, MVP makes little sense. When one on the contrary go to larger scales, proper interface becomes more important, the same with unambiguous assignment of responsibilities, and here comes MVP.

On the other hand, this scale rule of a thumb, may weight very little when the platform characteristics favours some kind of relations between the components, like with the web, where it seems to be easier to implement MVC, more than MVP.

How to workaround 'FB is not defined'?

There is solution for you :)

You must run your script after window loaded

if you use jQuery, you can use simple way:

<div id="fb-root"></div>
<script>
    window.fbAsyncInit = function() {
        FB.init({
            appId      : 'your-app-id',
            xfbml      : true,
            status     : true,
            version    : 'v2.5'
        });
    };

    (function(d, s, id){
        var js, fjs = d.getElementsByTagName(s)[0];
        if (d.getElementById(id)) {return;}
        js = d.createElement(s); js.id = id;
        js.src = "//connect.facebook.net/en_US/sdk.js";
        fjs.parentNode.insertBefore(js, fjs);
    }(document, 'script', 'facebook-jssdk'));
</script>

<script>
$(window).load(function() {
    var comment_callback = function(response) {
        console.log("comment_callback");
        console.log(response);
    }
    FB.Event.subscribe('comment.create', comment_callback);
    FB.Event.subscribe('comment.remove', comment_callback);
});
</script>

How to use Python requests to fake a browser visit a.k.a and generate User Agent?

I had a similar issue but I was unable to use the UserAgent class inside the fake_useragent module. I was running the code inside a docker container

import requests
import ujson
import random

response = requests.get('https://fake-useragent.herokuapp.com/browsers/0.1.11')
agents_dictionary = ujson.loads(response.text)
random_browser_number = str(random.randint(0, len(agents_dictionary['randomize'])))
random_browser = agents_dictionary['randomize'][random_browser_number]
user_agents_list = agents_dictionary['browsers'][random_browser]
user_agent = user_agents_list[random.randint(0, len(user_agents_list)-1)]

I targeted the endpoint used in the module. This solution still gave me a random user agent however there is the possibility that the data structure at the endpoint could change.

Add a new element to an array without specifying the index in Bash

With an indexed array, you can to something like this:

declare -a a=()
a+=('foo' 'bar')

How to use the COLLATE in a JOIN in SQL Server?

As a general rule, you can use Database_Default collation so you don't need to figure out which one to use. However, I strongly suggest reading Simons Liew's excellent article Understanding the COLLATE DATABASE_DEFAULT clause in SQL Server

SELECT *
  FROM [FAEB].[dbo].[ExportaComisiones] AS f
  JOIN [zCredifiel].[dbo].[optPerson] AS p
  ON (p.vTreasuryId = f.RFC) COLLATE Database_Default

How to clone a Date object?

Simplified version:

Date.prototype.clone = function () {
    return new Date(this.getTime());
}

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

The error is explicit ...

Error: Registry key 'Software\JavaSoft\Java Runtime Environment'\CurrentVersion' has value '1.8', but '1.7' is required.

Error: could not find java.dll

Error: Could not find Java SE Runtime Environment.

... you are attempting to use the java.exe 1.7 executable while the HKEY_LOCAL_MACHINE\Software\JavaSoft\Java Runtime Environment > CurrentVersion registry key has the value 1.8.

The recurring theme to proposed solutions is that the error is a configuration error. The error can be solved in various different manners (e.g. reconfiguration of the users environment or removal of java executables with fingers-crossed and hope that there exists another fallback java.exe in the users %PATH% and that the fallback java.exe is the correct executable).

The correct solution depends on what you're trying to achieve: "are you trying to downgrade from jdk-8 to jdk-7? Are trying to upgrade to jdk-8? ..."

Reproduction steps

  1. install jdk-7u80-windows-x64.exe

notes:

  • the java.exe executable available in the users %PATH% is installed in C:\Windows\System32
  • the installation does not update the users %PATH%
  • the HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment > CurrentVersion string registry entry is created (among others) with the value 1.7
  1. install jdk-8u191-windows-x64.exe

notes:

  • the users %PATH% is updated to include C:\Program Files (x86)\Common Files\Oracle\Java\javapath as the first entry
  • the the HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment > CurrentVersion string registry entries value is updated to 1.8

  1. update the users %PATH% environment variable, remove C:\Program Files (x86)\Common Files\Oracle\Java\javapath

  2. in a new command prompt java -version

Error: Registry key 'Software\JavaSoft\Java Runtime Environment'\CurrentVersion' has value '1.8', but '1.7' is required.

Error: could not find java.dll

Error: Could not find Java SE Runtime Environment.

Solution(s)

  1. OP's solution https://stackoverflow.com/a/29769311/1423507 is a "fingers-crossed and hope that there exists a fallback java.exe in the users %PATH% and that the fallback executable is correct" approach to the error. Given the reproduction steps, removing the java.exe, javaw.exe and javaws.exe executables from C:\Windows\System32 (only in my case) will result in no longer having any java.exe present in the users %PATH% resulting in the error 'java' is not recognized as an internal or external command, operable program or batch file. which is not so much of a solution.

  2. answers https://stackoverflow.com/a/35775493/1423507 and https://stackoverflow.com/a/36516620/1423507 work however you're reverting to using java.exe 1.7 (e.g. update the CurrentVersion registry key's value to match the java.exe version found in the users %PATH%).

  3. make surejava.exe 1.8 is the first found in the users %PATH% (how you do that is irrelevant) i.e.:

    • update the users %PATH% to include C:\Program Files (x86)\Common Files\Oracle\Java\javapath first (ensure that the executables in that directory are correct)
    • update the users %PATH% to include the absolute path of your java binaries first (set PATH="C:\Program Files\Java\jre1.8.0_191\bin;%PATH%")
    • set java specific environment variables and update the users %PATH% with them (set JAVA_HOME="C:\Program Files\Java"; set JRE_HOME=%JAVA_HOME%\jre1.8.0_191; set PATH=%JRE_HOME%\bin;%PATH%)

Executing a stored procedure within a stored procedure

Thats how it works stored procedures run in order, you don't need begin just something like

exec dbo.sp1
exec dbo.sp2

UIImageView - How to get the file name of the image assigned?

You can use objective c Runtime feature for associating imagename with the UImageView.

First import #import <objc/runtime.h> in your class

then implement your code as below :

NSString *filename = @"exampleImage";
UIImage *image = [UIImage imagedName:filename];
objc_setAssociatedObject(image, "imageFilename", filename, OBJC_ASSOCIATION_COPY);
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
//You can then get the image later:
NSString *filename = objc_getAssociatedObject(imageView, "imageFilename");

Hope it helps you.

Nginx sites-enabled, sites-available: Cannot create soft-link between config files in Ubuntu 12.04

You need to start by understanding that the target of a symlink is a pathname. And it can be absolute or relative to the directory which contains the symlink

Assuming you have foo.conf in sites-available

Try

cd sites-enabled
sudo ln -s ../sites-available/foo.conf .
ls -l

Now you will have a symlink in sites-enabled called foo.conf which has a target ../sites-available/foo.conf

Just to be clear, the normal configuration for Apache is that the config files for potential sites live in sites-available and the symlinks for the enabled sites live in sites-enabled, pointing at targets in sites-available. That doesn't quite seem to be the case the way you describe your setup, but that is not your primary problem.

If you want a symlink to ALWAYS point at the same file, regardless of the where the symlink is located, then the target should be the full path.

ln -s /etc/apache2/sites-available/foo.conf mysimlink-whatever.conf

Here is (line 1 of) the output of my ls -l /etc/apache2/sites-enabled:

lrwxrwxrwx 1 root root  26 Jun 24 21:06 000-default -> ../sites-available/default

See how the target of the symlink is relative to the directory that contains the symlink (it starts with ".." meaning go up one directory).

Hardlinks are totally different because the target of a hardlink is not a directory entry but a filing system Inode.

Create line after text with css

Here is another, in my opinion even simpler solution using a flex wrapper:

HTML:

<div class="wrapper">
  <p>Text</p>
  <div class="line"></div>
</div>

CSS:

.wrapper {
  display: flex;
  align-items: center;
}

.line {
  border-top: 1px solid grey;
  flex-grow: 1;
  margin: 0 10px;
}

JSFiddle

Run a single test method with maven

Running a set of methods in a Single Test Class With version 2.7.3, you can run only n tests in a single Test Class.

NOTE : it's supported for junit 4.x and TestNG.

You must use the following syntax

mvn -Dtest=TestCircle#mytest test

You can use patterns too

mvn -Dtest=TestCircle#test* test

As of surefire 2.12.1, you can select multiple methods (JUnit4X only at this time, patches welcome)

mvn -Dtest=TestCircle#testOne+testTwo test

Check this link about single tests

How to split a comma-separated value to columns

Try this:

declare @csv varchar(100) ='aaa,bb,csda,daass';
set @csv = @csv+',';

with cte as
(
    select SUBSTRING(@csv,1,charindex(',',@csv,1)-1) as val, SUBSTRING(@csv,charindex(',',@csv,1)+1,len(@csv)) as rem 
    UNION ALL
    select SUBSTRING(a.rem,1,charindex(',',a.rem,1)-1)as val, SUBSTRING(a.rem,charindex(',',a.rem,1)+1,len(A.rem)) 
    from cte a where LEN(a.rem)>=1
    ) select val from cte

How to convert java.sql.timestamp to LocalDate (java8) java.time?

I'll slightly expand @assylias answer to take time zone into account. There are at least two ways to get LocalDateTime for specific time zone.

You can use setDefault time zone for whole application. It should be called before any timestamp -> java.time conversion: 

public static void main(String... args) {
    TimeZone utcTimeZone = TimeZone.getTimeZone("UTC");
    TimeZone.setDefault(utcTimeZone);
    ...
    timestamp.toLocalDateTime().toLocalDate();
}

Or you can use toInstant.atZone chain:

timestamp.toInstant()
        .atZone(ZoneId.of("UTC"))
        .toLocalDate();

How to set div width using ng-style

ngStyle accepts a map:

$scope.myStyle = {
    "width" : "900px",
    "background" : "red"
};

Fiddle

PHP Curl UTF-8 Charset

I was fetching a windows-1252 encoded file via cURL and the mb_detect_encoding(curl_exec($ch)); returned UTF-8. Tried utf8_encode(curl_exec($ch)); and the characters were correct.

What is the difference between SAX and DOM?

Both SAX and DOM are used to parse the XML document. Both has advantages and disadvantages and can be used in our programming depending on the situation

SAX:

  1. Parses node by node

  2. Does not store the XML in memory

  3. We cant insert or delete a node

  4. Top to bottom traversing

DOM

  1. Stores the entire XML document into memory before processing

  2. Occupies more memory

  3. We can insert or delete nodes

  4. Traverse in any direction.

If we need to find a node and does not need to insert or delete we can go with SAX itself otherwise DOM provided we have more memory.

Angular 2 optional route parameter

Facing a similar problem with lazy loading I have done this:

const routes: Routes = [
  {
    path: 'users',
    redirectTo: 'users/',
    pathMatch: 'full'
  },
  {
    path: 'users',
    loadChildren: './users/users.module#UserssModule',
    runGuardsAndResolvers: 'always'
  },
[...]

And then in the component:

  ngOnInit() {
    this.activatedRoute.paramMap.pipe(
      switchMap(
        (params: ParamMap) => {
          let id: string = params.get('id');
          if (id == "") {
            return of(undefined);
          }
          return this.usersService.getUser(Number(params.get('id')));
        }
      )
    ).subscribe(user => this.selectedUser = user);
  }

This way:

  • The route without / is redirected to the route with. Because of the pathMatch: 'full', only such specific full route is redirected.

  • Then, users/:id is received. If the actual route was users/, id is "", so check it in ngOnInit and act accordingly; else, id is the id and proceed.

  • The rest of the componect acts on selectedUser is or not undefined (*ngIf and the things like that).

"Retrieving the COM class factory for component.... error: 80070005 Access is denied." (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))

Sometimes, you create new application pool and cann't solve it via DCOMCNFG. Then there is another method to do:

Set the Identity (Model Name) of application pool to LocalSystem.

I don't know the root cause, but it solve my problem one time.

AngularJS Uploading An Image With ng-upload

In my case above mentioned methods work fine with php but when i try to upload files with these methods in node.js then i have some problem. So instead of using $http({..,..,...}) use the normal jquery ajax.

For select file use this

<input type="file" name="file" onchange="angular.element(this).scope().uploadFile(this)"/>

And in controller

$scope.uploadFile = function(element) {   
var data = new FormData();
data.append('file', $(element)[0].files[0]);
jQuery.ajax({
      url: 'brand/upload',
      type:'post',
      data: data,
      contentType: false,
      processData: false,
      success: function(response) {
      console.log(response);
      },
      error: function(jqXHR, textStatus, errorMessage) {
      alert('Error uploading: ' + errorMessage);
      }
 });   
};

Changing capitalization of filenames in Git

You can open the ".git" directory and then edit the "config" file. Under "[core]" set, set "ignorecase = true" and you are done ;)

How to change default install location for pip

You can set the following environment variable:

PIP_TARGET=/path/to/pip/dir

https://pip.pypa.io/en/stable/user_guide/#environment-variables

Map a 2D array onto a 1D array

You should be able to access the 2d array with a simple pointer in place. The array[x][y] will be arranged in the pointer as p[0x * width + 0y][0x * width + 1y]...[0x * width + n-1y][1x * width + 0y] etc.

How to add property to object in PHP >= 5.3 strict mode without generating error

I always use this way:

$foo = (object)null; //create an empty object
$foo->bar = "12345";

echo $foo->bar; //12345

How can I remove item from querystring in asp.net using c#?

Yes, there are no classes built into .NET to edit query strings. You'll have to either use Regex or some other method of altering the string itself.

How to Import Excel file into mysql Database from PHP

For >= 2nd row values insert into table- 

$file = fopen($filename, "r");
//$sql_data = "SELECT * FROM prod_list_1 ";

$count = 0;                                         // add this line
while (($emapData = fgetcsv($file, 10000, ",")) !== FALSE)
{
    //print_r($emapData);
    //exit();
    $count++;                                      // add this line

    if($count>1){                                  // add this line
      $sql = "INSERT into prod_list_1(p_bench,p_name,p_price,p_reason) values ('$emapData[0]','$emapData[1]','$emapData[2]','$emapData[3]')";
      mysql_query($sql);
    }                                              // add this line
}

MySQL Update Column +1?

The easiest way is to not store the count, relying on the COUNT aggregate function to reflect the value as it is in the database:

   SELECT c.category_name,
          COUNT(p.post_id) AS num_posts
     FROM CATEGORY c
LEFT JOIN POSTS p ON p.category_id = c.category_id

You can create a view to house the query mentioned above, so you can query the view just like you would a table...

But if you're set on storing the number, use:

UPDATE CATEGORY
   SET count = count + 1
 WHERE category_id = ?

..replacing "?" with the appropriate value.

JavaScript: How do I print a message to the error console?

As always, Internet Explorer is the big elephant in rollerskates that stops you just simply using console.log().

jQuery's log can be adapted quite easily, but is a pain having to add it everywhere. One solution if you're using jQuery is to put it into your jQuery file at the end, minified first:

function log()
{
    if (arguments.length > 0)
    {
        // Join for graceful degregation
        var args = (arguments.length > 1) ? Array.prototype.join.call(arguments, " ") : arguments[0];

        // This is the standard; Firebug and newer WebKit browsers support this.
        try {
            console.log(args);
            return true;
        } catch(e) {
            // Newer Opera browsers support posting erros to their consoles.
            try {
                opera.postError(args);
                return true;
            } 
            catch(e) 
            {
            }
        }

        // Catch all; a good old alert box.
        alert(args);
        return false;
    }
}

How to read keyboard-input?

try 

raw_input('Enter your input:')  # If you use Python 2
input('Enter your input:')      # If you use Python 3

and if you want to have a numeric value just convert it: 

try:
    mode=int(raw_input('Input:'))
except ValueError:
    print "Not a number"

Setting values on a copy of a slice from a DataFrame

This warning comes because your dataframe x is a copy of a slice. This is not easy to know why, but it has something to do with how you have come to the current state of it.

You can either create a proper dataframe out of x by doing

x = x.copy()

This will remove the warning, but it is not the proper way

You should be using the DataFrame.loc method, as the warning suggests, like this:

x.loc[:,'Mass32s'] = pandas.rolling_mean(x.Mass32, 5).shift(-2)

Creating an Arraylist of Objects

If you want to allow a user to add a bunch of new MyObjects to the list, you can do it with a for loop: Let's say I'm creating an ArrayList of Rectangle objects, and each Rectangle has two parameters- length and width.

//here I will create my ArrayList:

ArrayList <Rectangle> rectangles= new ArrayList <>(3); 

int length;
int width;

for(int index =0; index <3;index++)
{JOptionPane.showMessageDialog(null, "Rectangle " + (index + 1));
 length = JOptionPane.showInputDialog("Enter length");
 width = JOptionPane.showInputDialog("Enter width");

 //Now I will create my Rectangle and add it to my rectangles ArrayList:

 rectangles.add(new Rectangle(length,width));

//This passes the length and width values to the rectangle constructor,
  which will create a new Rectangle and add it to the ArrayList.

}

What's causing my java.net.SocketException: Connection reset?

This error occurs on the server side when the client closed the socket connection before the response could be returned over the socket. In a web app scenario not all of these are dangerous, since they can be created manually. For example, by quitting the browser before the reponse was retrieved.

Bootstrap datetimepicker is not a function

Try to use datepicker/ timepicker instead of datetimepicker like:

replace:

$('#datetimepicker1').datetimepicker();

with:

$('#datetimepicker1').datepicker(); // or timepicker for time picker

Showing Thumbnail for link in WhatsApp || og:image meta-tag doesn't work

You only need to type the message with "http://" at the start. For example: http://www.google.com shows the thumbnail image, but www.google.com no.

How do I set a fixed background image for a PHP file?

I found my answer.

<?php
$profpic = "bg.jpg";
?>

<html>
<head>
<style type="text/css">

body {
background-image: url('<?php echo $profpic;?>');
}
</style>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Hey</title>
</head>
<body>
</body>
</html>

Same font except its weight seems different on different browsers

Try text-rendering: geometricPrecision;.

Different from text-rendering: optimizeLegibility;, it takes care of kerning problems when scaling fonts, while the last enables kerning and ligatures.

Set field value with reflection

Hope this is something what you are trying to do :

import java.lang.reflect.Field;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

public class Test {

    private Map ttp = new HashMap(); 

    public  void test() {
        Field declaredField =  null;
        try {

            declaredField = Test.class.getDeclaredField("ttp");
            boolean accessible = declaredField.isAccessible();

            declaredField.setAccessible(true);

            ConcurrentHashMap<Object, Object> concHashMap = new ConcurrentHashMap<Object, Object>();
            concHashMap.put("key1", "value1");
            declaredField.set(this, concHashMap);
            Object value = ttp.get("key1");

            System.out.println(value);

            declaredField.setAccessible(accessible);

        } catch (NoSuchFieldException 
                | SecurityException
                | IllegalArgumentException 
                | IllegalAccessException e) {
            e.printStackTrace();
        }

    }

    public static void main(String... args) {
        Test test = new Test();
        test.test(); 
    }
}

It prints :

value1

Hamcrest compare collections

For list of objects you may need something like this:

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.contains;
import static org.hamcrest.Matchers.allOf;
import static org.hamcrest.beans.HasPropertyWithValue.hasProperty;
import static org.hamcrest.Matchers.is;

@Test
@SuppressWarnings("unchecked")
public void test_returnsList(){

    arrange();
  
    List<MyBean> myList = act();
    
    assertThat(myList , contains(allOf(hasProperty("id",          is(7L)), 
                                       hasProperty("name",        is("testName1")),
                                       hasProperty("description", is("testDesc1"))),
                                 allOf(hasProperty("id",          is(11L)), 
                                       hasProperty("name",        is("testName2")),
                                       hasProperty("description", is("testDesc2")))));
}

Use containsInAnyOrder if you do not want to check the order of the objects.

P.S. Any help to avoid the warning that is suppresed will be really appreciated.

Python: One Try Multiple Except

Yes, it is possible.

try:
   ...
except FirstException:
   handle_first_one()

except SecondException:
   handle_second_one()

except (ThirdException, FourthException, FifthException) as e:
   handle_either_of_3rd_4th_or_5th()

except Exception:
   handle_all_other_exceptions()

See: http://docs.python.org/tutorial/errors.html

The "as" keyword is used to assign the error to a variable so that the error can be investigated more thoroughly later on in the code. Also note that the parentheses for the triple exception case are needed in python 3. This page has more info: Catch multiple exceptions in one line (except block)

Difference between Static methods and Instance methods

Difference between Static methods and Instance methods

  1. Instance method are methods which require an object of its class to be created before it can be called. Static methods are the methods in Java that can be called without creating an object of class.

  2. Static method is declared with static keyword. Instance method is not with static keyword.

  3. Static method means which will exist as a single copy for a class. But instance methods exist as multiple copies depending on the number of instances created for that class.

  4. Static methods can be invoked by using class reference. Instance or non static methods are invoked by using object reference.

  5. Static methods can’t access instance methods and instance variables directly. Instance method can access static variables and static methods directly.

Reference : geeksforgeeks

PHP: How to remove all non printable characters in a string?

"cedivad" solved the issue for me with persistent result of Swedish chars ÅÄÖ.

$text = preg_replace( '/[^\p{L}\s]/u', '', $text );

Thanks!

What is the difference between "expose" and "publish" in Docker?

See the official documentation reference: https://docs.docker.com/engine/reference/builder/#expose

The EXPOSE allow you to define private (container) and public (host) ports to expose at image build time for when the container is running if you run the container with -P.

$ docker help run
...
  -P, --publish-all                    Publish all exposed ports to random ports
...

The public port and protocol are optional, if not a public port is specified, a random port will be selected on host by docker to expose the specified container port on Dockerfile.

A good pratice is do not specify public port, because it limits only one container per host ( a second container will throw a port already in use ).

You can use -p in docker run to control what public port the exposed container ports will be connectable.

Anyway, If you do not use EXPOSE (with -P on docker run) nor -p, no ports will be exposed.

If you always use -p at docker run you do not need EXPOSE but if you use EXPOSE your docker run command may be more simple, EXPOSE can be useful if you don't care what port will be expose on host, or if you are sure of only one container will be loaded.

CMake: How to build external projects and include their targets

I think you're mixing up two different paradigms here.

As you noted, the highly flexible ExternalProject module runs its commands at build time, so you can't make direct use of Project A's import file since it's only created once Project A has been installed.

If you want to include Project A's import file, you'll have to install Project A manually before invoking Project B's CMakeLists.txt - just like any other third-party dependency added this way or via find_file / find_library / find_package.

If you want to make use of ExternalProject_Add, you'll need to add something like the following to your CMakeLists.txt:

ExternalProject_Add(project_a
  URL ...project_a.tar.gz
  PREFIX ${CMAKE_CURRENT_BINARY_DIR}/project_a
  CMAKE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>
)

include(${CMAKE_CURRENT_BINARY_DIR}/lib/project_a/project_a-targets.cmake)

ExternalProject_Get_Property(project_a install_dir)
include_directories(${install_dir}/include)

add_dependencies(project_b_exe project_a)
target_link_libraries(project_b_exe ${install_dir}/lib/alib.lib)

Python - Count elements in list

just do len(MyList)

This also works for strings, tuples, dict objects.

shorthand c++ if else statement

Depending on how often you use this in your code you could consider the following:

macro

#define SIGN(x) ( (x) >= 0 )

Inline function

inline int sign(int x)
{
    return x >= 0;
}

Then you would just go:

bigInt.sign = sign(number);

Comma separated results in SQL

If you're stuck with SQL Server <2017, you can use GroupConcat. The syntax and the performance is far better than the FOR XML PATH sollution.

Installation:

-- https://codeplexarchive.blob.core.windows.net/archive/projects/groupconcat/groupconcat.zip
create assembly [GroupConcat] from 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with permission_set = safe;
create aggregate [dbo].[GROUP_CONCAT]    (@VALUE [nvarchar](4000))                                                      returns[nvarchar](max) external name [GroupConcat].[GroupConcat.GROUP_CONCAT];
create aggregate [dbo].[GROUP_CONCAT_D]  (@VALUE [nvarchar](4000), @DELIMITER [nvarchar](4))                            returns[nvarchar](max) external name [GroupConcat].[GroupConcat.GROUP_CONCAT_D];
create aggregate [dbo].[GROUP_CONCAT_DS] (@VALUE [nvarchar](4000), @DELIMITER [nvarchar](4), @SORT_ORDER [tinyint])     returns[nvarchar](max) external name [GroupConcat].[GroupConcat.GROUP_CONCAT_DS];
create aggregate [dbo].[GROUP_CONCAT_S]  (@VALUE [nvarchar](4000), @SORT_ORDER [tinyint])                               returns[nvarchar](max) external name [GroupConcat].[GroupConcat.GROUP_CONCAT_S];

go

Usage:

declare @liststr varchar(max)
select @liststr = dbo.group_concat_d(institutionname, ',')
from education
where studentnumber = '111'
group by studentnumber;
select @liststr

GroupConcat does not support ordering, though. You could use PIVOT, CTE's and windows functions if you need ordering:

drop table if exists #students;
create table #students (
    name        varchar(20),
    institution varchar(20),
    year        int -- order by year
)
go

insert into #students(name, institution, year)
values
    ('Simon', 'INSTITUTION1', 2005),
    ('Simon', 'INSTITUTION2', 2008);

with cte as (
    select name,
           institution,
           rn = row_number() over (partition by name order by year)
    from #students
)
select name,
       [1] +
       isnull((',' + [2]), '') +
       isnull((',' + [3]), '') +
       isnull((',' + [4]), '') +
       isnull((',' + [5]), '') +
       isnull((',' + [6]), '') +
       isnull((',' + [7]), '') +
       isnull((',' + [8]), '') +
       isnull((',' + [9]), '') +
       isnull((',' + [10]), '') +
       isnull((',' + [11]), '') +
       isnull((',' + [12]), '') +
       isnull((',' + [13]), '') +
       isnull((',' + [14]), '') +
       isnull((',' + [15]), '') +
       isnull((',' + [16]), '') +
       isnull((',' + [17]), '') +
       isnull((',' + [18]), '') +
       isnull((',' + [19]), '') +
       isnull((',' + [20]), '')
from cte
    pivot (
    max(institution)
    for rn in ([1], [2], [3], [4],[5],[6],[7],[8],[9],[10],[11],[12],[13],[14],[15],[16],[17],[18],[19],[20])
    ) as piv

Java: How to convert List to Map

Short and sweet.

Using Java 8 you can do following :

Map<Key, Value> result= results
                       .stream()
                       .collect(Collectors.toMap(Value::getName,Function.identity()));

Value can be any object you use.

How to select first child with jQuery?

Hi we can use default method "first" in jQuery

Here some examples:

When you want to add class for first div

  $('.alldivs div').first().addClass('active');

When you want to change the remove the "onediv" class and add only to first child

   $('.alldivs div').removeClass('onediv').first().addClass('onediv');

Deprecated Java HttpClient - How hard can it be?

IMHO the accepted answer is correct but misses some 'teaching' as it does not explain how to come up with the answer. For all deprecated classes look at the JavaDoc (if you do not have it either download it or go online), it will hint at which class to use to replace the old code. Of course it will not tell you everything, but this is a start. Example:

...
 *
 * @deprecated (4.3) use {@link HttpClientBuilder}.  <----- THE HINT IS HERE !
 */
@ThreadSafe
@Deprecated
public class DefaultHttpClient extends AbstractHttpClient {

Now you have the class to use, HttpClientBuilder, as there is no constructor to get a builder instance you may guess that there must be a static method instead: create. Once you have the builder you can also guess that as for most builders there is a build method, thus:

org.apache.http.impl.client.HttpClientBuilder.create().build();

AutoClosable:

As Jules hinted in the comments, the returned class implements java.io.Closable, so if you use Java 7 or above you can now do:

    try (CloseableHttpClient httpClient = HttpClientBuilder.create().build()) {...}

The advantage is that you do not have to deal with finally and nulls.

Other relevant info

Also make sure to read about connection pooling and set the timeouts.

Hex-encoded String to Byte Array

Use:

str.getBytes("UTF-16LE");

CKEditor instance already exists

CKeditor 4.2.1

There is a lot of answers here but for me I needed something more (bit dirty too so if anyone can improve please do). For me MODALs where my issue.

I was rendering the CKEditor in a modal, using Foundation. Ideally I would have destoryed the editor upon closing, however I didn't want to mess with Foundation.

I called delete, I tried remove and another method but this was what I finally settled with.

I was using textarea's to populate not DIVs.

My Solution

//hard code the DIV removal (due to duplication of CKeditors on page however they didn't work)

    $("#cke_myckeditorname").remove();


     if (CKEDITOR.instances['myckeditorname']) {
                delete CKEDITOR.instances['myckeditorname'];
                CKEDITOR.replace('myckeditorname', GetCKEditorSettings());
            } else {
                CKEDITOR.replace('myckeditorname', GetCKEditorSettings());
            }

this was my method to return my specific formatting, which you might not want.

    function GetCKEditorSettings()
    {
       return {
                    linkShowAdvancedTab: false,
                    linkShowTargetTab: false,
                    removePlugins: 'elementspath,magicline',
                    extraAllowedContent: 'hr blockquote div',
                    fontSize_sizes: 'small/8px;normal/12px;large/16px;larger/24px;huge/36px;',
                    toolbar: [
                        ['FontSize'],
                        ['Bold', 'Italic', 'Underline', '-', 'NumberedList', 'BulletedList', '-', 'Link', 'Unlink'],
                        ['Smiley']
                    ]
                };
    }

AttributeError: 'module' object has no attribute 'urlretrieve'

Suppose you have following lines of code

MyUrl = "www.google.com" #Your url goes here
urllib.urlretrieve(MyUrl)

If you are receiving following error message

AttributeError: module 'urllib' has no attribute 'urlretrieve'

Then you should try following code to fix the issue:

import urllib.request
MyUrl = "www.google.com" #Your url goes here
urllib.request.urlretrieve(MyUrl)

Ng-model does not update controller value

Using this instead of $scope works.

_x000D_
_x000D_ 
function AppCtrl($scope){_x000D_
  $scope.searchText = "";_x000D_
  $scope.check = function () {_x000D_
    console.log("You typed '" + this.searchText + "'"); // used 'this' instead of $scope_x000D_
  }_x000D_
}
_x000D_ 
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>_x000D_
_x000D_
<div ng-app>_x000D_
  <div ng-controller="AppCtrl">_x000D_
    <input ng-model="searchText"/>_x000D_
    <button ng-click="check()">Write console log</button>_x000D_
  </div>_x000D_
</div>
_x000D_
_x000D_
_x000D_

Edit: At the time writing this answer, I had much more complicated situation than this. After the comments, I tried to reproduce it to understand why it works, but no luck. I think somehow (don't really know why) a new child scope is generated and this refers to that scope. But if $scope is used, it actually refers to the parent $scope because of javascript's lexical scope feature.

Would be great if someone having this problem tests this way and inform us.

How to deal with floating point number precision in JavaScript?

Use 

var x = 0.1*0.2;
 x =Math.round(x*Math.pow(10,2))/Math.pow(10,2);

How to create and use resources in .NET

The above method works good.

Another method (I am assuming web here) is to create your page. Add controls to the page. Then while in design mode go to: Tools > Generate Local Resource. A resource file will automatically appear in the solution with all the controls in the page mapped in the resource file.

To create resources for other languages, append the 4 character language to the end of the file name, before the extension (Account.aspx.en-US.resx, Account.aspx.es-ES.resx...etc).

To retrieve specific entries in the code-behind, simply call this method: GetLocalResourceObject([resource entry key/name]).

jQuery "on create" event for dynamically-created elements

I Think it's worth mentioning that in some cases, this would work:

$( document ).ajaxComplete(function() {
// Do Stuff
});

How to handle AssertionError in Python and find out which line or statement it occurred on?

The traceback module and sys.exc_info are overkill for tracking down the source of an exception. That's all in the default traceback. So instead of calling exit(1) just re-raise:

try:
    assert "birthday cake" == "ice cream cake", "Should've asked for pie"
except AssertionError:
    print 'Houston, we have a problem.'
    raise

Which gives the following output that includes the offending statement and line number:

Houston, we have a problem.
Traceback (most recent call last):
  File "/tmp/poop.py", line 2, in <module>
    assert "birthday cake" == "ice cream cake", "Should've asked for pie"
AssertionError: Should've asked for pie

Similarly the logging module makes it easy to log a traceback for any exception (including those which are caught and never re-raised):

import logging

try:
    assert False == True 
except AssertionError:
    logging.error("Nothing is real but I can't quit...", exc_info=True)

Create Django model or update if exists

If one of the input when you create is a primary key, this will be enough:

Person.objects.get_or_create(id=1)

It will automatically update if exist since two data with the same primary key is not allowed.

Insert data through ajax into mysql database

The available answers led to the fact that I entered empty values into the database. I corrected this error by replacing the serialize () function with the following code.

$(document).ready(function(){

// When click the button.
$("#button").click(function() {

    // Assigning Variables to Form Fields
    var email = $("#email").val();

    // Send the form data using the ajax method
    $.ajax({
        data: "email=" + email,
        type: "post",
        url: "your_file.php",
        success: function(data){
            alert("Data Save: " + data);
        }
    });

});

});

How do I get JSON data from RESTful service using Python?

Well first of all I think rolling out your own solution for this all you need is urllib2 or httplib2 . Anyways in case you do require a generic REST client check this out .

https://github.com/scastillo/siesta

However i think the feature set of the library will not work for most web services because they shall probably using oauth etc .. . Also I don't like the fact that it is written over httplib which is a pain as compared to httplib2 still should work for you if you don't have to handle a lot of redirections etc ..

How to while loop until the end of a file in Python without checking for empty line?

Find end position of file:

f = open("file.txt","r")
f.seek(0,2) #Jumps to the end
f.tell()    #Give you the end location (characters from start)
f.seek(0)   #Jump to the beginning of the file again

Then you can to:

if line == '' and f.tell() == endLocation:
   break

Find all special characters in a column in SQL Server 2008

 
select count(*) from dbo.tablename where address_line_1 LIKE '%[\'']%' {eSCAPE'\'}

File upload along with other object in Jersey restful web service

I used file upload example from,

http://www.mkyong.com/webservices/jax-rs/file-upload-example-in-jersey/

in my resource class i have below method

@POST
    @Path("/upload")
    @Consumes(MediaType.MULTIPART_FORM_DATA)
    public Response  attachupload(@FormDataParam("file") byte[] is,
@FormDataParam("file") FormDataContentDisposition fileDetail,
@FormDataParam("fileName") String flename){
attachService.saveAttachment(flename,is);
}

in my attachService.java i have below method

 public void saveAttachment(String flename,  byte[] is) {
            // TODO Auto-generated method stub
         attachmentDao.saveAttachment(flename,is);

        }

in Dao i have

attach.setData(is);
attach.setFileName(flename);

in my HBM mapping is like

<property name="data" type="binary" >
            <column name="data" />
</property>

This working for all type of files like .PDF,.TXT, .PNG etc.,

Add a prefix string to beginning of each line

If you have Perl:

perl -pe 's/^/PREFIX/' input.file

How do I get the directory from a file's full path?

Use below mentioned code to get the folder path

Path.GetDirectoryName(filename);

This will return "C:\MyDirectory" in your case

Python 2: AttributeError: 'list' object has no attribute 'strip'

Hope this helps :)

>>> x = [i.split(";") for i in l]
>>> x
[['Facebook', 'Google+', 'MySpace'], ['Apple', 'Android']]
>>> z = [j for i in x for j in i]
>>> z
['Facebook', 'Google+', 'MySpace', 'Apple', 'Android']
>>>

What are the differences between NP, NP-Complete and NP-Hard?

NP-complete problems are those problems that are both NP-Hard and in the complexity class NP. Therefore, to show that any given problem is NP-complete, you need to show that the problem is both in NP and that it is NP-hard.

Problems that are in the NP complexity class can be solved non-deterministically in polynomial time and a possible solution (i.e., a certificate) for a problem in NP can be verified for correctness in polynomial time.

An example of a non-deterministic solution to the k-clique problem would be something like:

1) randomly select k nodes from a graph

2) verify that these k nodes form a clique.

The above strategy is polynomial in the size of the input graph and therefore the k-clique problem is in NP.

Note that all problems deterministically solvable in polynomial time are also in NP.

Showing that a problem is NP-hard typically involves a reduction from some other NP-hard problem to your problem using a polynomial time mapping: http://en.wikipedia.org/wiki/Reduction_(complexity)

Install php-mcrypt on CentOS 6

For me I had to add the EPEL repository. It is where my php-mcrypt came from:

[root@system ~]$ repoquery -i php-mcrypt

Name        : php-mcrypt
Version     : 5.3.3
Release     : 1.el6
Architecture: i686
Size        : 39225
Packager    : Fedora Project
Group       : Development/Languages
URL         : http://www.php.net/
Repository  : epel <----------
Summary     : Standard PHP module provides mcrypt library support
Source      : php-extras-5.3.3-1.el6.src.rpm
Description :
Standard PHP module provides mcrypt library support

You can enable the EPEL repo with the instructions here:

http://fedoraproject.org/wiki/EPEL

How can I combine flexbox and vertical scroll in a full-height app?

Thanks to https://stackoverflow.com/users/1652962/cimmanon that gave me the answer.

The solution is setting a height to the vertical scrollable element. For example:

#container article {
    flex: 1 1 auto;
    overflow-y: auto;
    height: 0px;
}

The element will have height because flexbox recalculates it unless you want a min-height so you can use height: 100px; that it is exactly the same as: min-height: 100px;

#container article {
    flex: 1 1 auto;
    overflow-y: auto;
    height: 100px; /* == min-height: 100px*/
}

So the best solution if you want a min-height in the vertical scroll:

#container article {
    flex: 1 1 auto;
    overflow-y: auto;
    min-height: 100px;
}

If you just want full vertical scroll in case there is no enough space to see the article:

#container article {
    flex: 1 1 auto;
    overflow-y: auto;
    min-height: 0px;
}

The final code: http://jsfiddle.net/ch7n6/867/

jQuery DatePicker with today as maxDate

 
$(".datepicker").datepicker({maxDate: '0'});

This will set the maxDate to +0 days from the current date (i.e. today). See:

http://api.jqueryui.com/datepicker/#option-maxDate

Relative div height

Percentage in width works but percentage in height will not work unless you specify a specific height for any parent in the dependent loop...

See this : percentage in height doesn’t work?

vertical align middle in <div>

I found this solution by Sebastian Ekström. It's quick, dirty, and works really well. Even if you don't know the parent's height:

.element {
  position: relative;
  top: 50%;
  -webkit-transform: translateY(-50%);
  -ms-transform: translateY(-50%);
  transform: translateY(-50%);
}

Read the full article here.

ngrok command not found

This is how I got it to work..

For Mac

  1. If you downloaded via a download link, you need to add ngrok path to your .bash_profile or .bashrc whichever one you are using.

For Windows 10 bash:

  1. Download ngrok from https://bin.equinox.io/c/4VmDzA7iaHb/ngrok-stable-windows-amd64.zip
  2. Move executable file ngrok.exe to C:\Windows\system32\ngrok.exe
  3. Add Environment Variables via UI (search for "Edit the environment variables for your account" in the search bar next to windows logo => double click on Path under Users Variables for yourusername => Click New => add your path C:\Windows\system32\ngrok.exe => click OK.
  4. Restart your bash and you should be able to run "ngrok http 80" command.

How to convert object to Dictionary<TKey, TValue> in C#?

As I understand it, you're not sure what the keys and values are, but you want to convert them into strings?

Maybe this can work:

public static void MyMethod(object obj)
{
  var iDict = obj as IDictionary;
  if (iDict != null)
  {
    var dictStrStr = iDict.Cast<DictionaryEntry>()
      .ToDictionary(de => de.Key.ToString(), de => de.Value.ToString());

    // use your dictStrStr        
  }
  else
  {
    // My object is not an IDictionary
  }
}

Reading Space separated input in python

 
the_string = raw_input()
name, age = the_string.split()

PHP GuzzleHttp. How to make a post request with params?

Note in Guzzle V6.0+, another source of getting the following error may be incorrect use of JSON as an array:

Passing in the "body" request option as an array to send a POST request has been deprecated. Please use the "form_params" request option to send a application/x-www-form-urlencoded request, or a the "multipart" request option to send a multipart/form-data request.

Incorrect:

$response = $client->post('http://example.com/api', [
    'body' => [
        'name' => 'Example name',
    ]
])

Correct:

$response = $client->post('http://example.com/api', [
    'json' => [
        'name' => 'Example name',
    ]
])

Correct:

$response = $client->post('http://example.com/api', [
    'headers' => ['Content-Type' => 'application/json'],
    'body' => json_encode([
        'name' => 'Example name',
    ])
])

Get a resource using getResource()

One thing to keep in mind is that the relevant path here is the path relative to the file system location of your class... in your case TestGameTable.class. It is not related to the location of the TestGameTable.java file.
I left a more detailed answer here... where is resource actually located

findViewByID returns null

Possibly, you are calling findViewById before calling setContentView? If that's the case, try calling findViewById AFTER calling setContentView

How to change python version in anaconda spyder

You can launch the correct version of Spyder by launching from Ananconda's Navigator. From the dropdown, switch to your desired environment and then press the launch Spyder button. You should be able to check the results right away.

Webfont Smoothing and Antialiasing in Firefox and Opera

As Opera is powered by Blink since Version 15.0 -webkit-font-smoothing: antialiased does also work on Opera.

Firefox has finally added a property to enable grayscaled antialiasing. After a long discussion it will be available in Version 25 with another syntax, which points out that this property only works on OS X.

-moz-osx-font-smoothing: grayscale;

This should fix blurry icon fonts or light text on dark backgrounds.

.font-smoothing {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

You may read my post about font rendering on OSX which includes a Sass mixin to handle both properties.

How to vertically align an image inside a div

You can use table structure inside a div

<div class="frame">
     <table width="100%">
         <tr>
            <td vertical-align="middle" align="center" height="25">
                <img src="https://jsfiddle.net/img/logo.png" >  
            </td>
        </tr>
    </table>
</div>

How to access Spring MVC model object in javascript file?

in controller:

JSONObject jsonobject=new JSONObject();
jsonobject.put("error","Invalid username");
response.getWriter().write(jsonobject.toString());

in javascript:

f(data!=success){



 var errorMessage=jQuery.parseJson(data);
  alert(errorMessage.error);
}

How to filter Pandas dataframe using 'in' and 'not in' like in SQL

A trick if you want to keep the order of the list:

df = pd.DataFrame({'country': ['US', 'UK', 'Germany', 'China']})
countries_to_keep = ['Germany', 'US']


ind=[df.index[df['country']==i].tolist() for i in countries_to_keep]
flat_ind=[item for sublist in ind for item in sublist]

df.reindex(flat_ind)

   country
2  Germany
0       US

Circular (or cyclic) imports in Python

If you do import foo (inside bar.py) and import bar (inside foo.py), it will work fine. By the time anything actually runs, both modules will be fully loaded and will have references to each other.

The problem is when instead you do from foo import abc (inside bar.py) and from bar import xyz (inside foo.py). Because now each module requires the other module to already be imported (so that the name we are importing exists) before it can be imported.

How to make a progress bar

You can do it by controlling the width of a div via css. Something roughly along these lines:

<div id="container" style="width:100%; height:50px; border:1px solid black;">
  <div id="progress-bar" style="width:50%;/*change this width */
       background-image:url(someImage.png);
       height:45px;">
  </div>
</div>

That width value can be sent in from php if you so desire.

Convert row to column header for Pandas DataFrame,

It would be easier to recreate the data frame. This would also interpret the columns types from scratch.

headers = df.iloc[0]
new_df  = pd.DataFrame(df.values[1:], columns=headers)

How to throw a C++ exception

Wanted to ADD to the other answers described here an additional note, in the case of custom exceptions.

In the case where you create your own custom exception, that derives from std::exception, when you catch "all possible" exceptions types, you should always start the catch clauses with the "most derived" exception type that may be caught. See the example (of what NOT to do):

#include <iostream>
#include <string>

using namespace std;

class MyException : public exception
{
public:
    MyException(const string& msg) : m_msg(msg)
    {
        cout << "MyException::MyException - set m_msg to:" << m_msg << endl;
    }

   ~MyException()
   {
        cout << "MyException::~MyException" << endl;
   }

   virtual const char* what() const throw () 
   {
        cout << "MyException - what" << endl;
        return m_msg.c_str();
   }

   const string m_msg;
};

void throwDerivedException()
{
    cout << "throwDerivedException - thrown a derived exception" << endl;
    string execptionMessage("MyException thrown");
    throw (MyException(execptionMessage));
}

void illustrateDerivedExceptionCatch()
{
    cout << "illustrateDerivedExceptionsCatch - start" << endl;
    try 
    {
        throwDerivedException();
    }
    catch (const exception& e)
    {
        cout << "illustrateDerivedExceptionsCatch - caught an std::exception, e.what:" << e.what() << endl;
        // some additional code due to the fact that std::exception was thrown...
    }
    catch(const MyException& e)
    {
        cout << "illustrateDerivedExceptionsCatch - caught an MyException, e.what::" << e.what() << endl;
        // some additional code due to the fact that MyException was thrown...
    }

    cout << "illustrateDerivedExceptionsCatch - end" << endl;
}

int main(int argc, char** argv)
{
    cout << "main - start" << endl;
    illustrateDerivedExceptionCatch();
    cout << "main - end" << endl;
    return 0;
}

NOTE:

0) The proper order should be vice-versa, i.e.- first you catch (const MyException& e) which is followed by catch (const std::exception& e).

1) As you can see, when you run the program as is, the first catch clause will be executed (which is probably what you did NOT wanted in the first place).

2) Even though the type caught in the first catch clause is of type std::exception, the "proper" version of what() will be called - cause it is caught by reference (change at least the caught argument std::exception type to be by value - and you will experience the "object slicing" phenomena in action).

3) In case that the "some code due to the fact that XXX exception was thrown..." does important stuff WITH RESPECT to the exception type, there is misbehavior of your code here.

4) This is also relevant if the caught objects were "normal" object like: class Base{}; and class Derived : public Base {}...

5) g++ 7.3.0 on Ubuntu 18.04.1 produces a warning that indicates the mentioned issue:

In function ‘void illustrateDerivedExceptionCatch()’: item12Linux.cpp:48:2: warning: exception of type ‘MyException’ will be caught catch(const MyException& e) ^~~~~

item12Linux.cpp:43:2: warning: by earlier handler for ‘std::exception’ catch (const exception& e) ^~~~~

Again, I will say, that this answer is only to ADD to the other answers described here (I thought this point is worth mention, yet could not depict it within a comment).

Http Post request with content type application/x-www-form-urlencoded not working in Spring

you should replace @RequestBody with @RequestParam, and do not accept parameters with a java entity.

Then you controller is probably like this:

@RequestMapping(value = "/patientdetails", method = RequestMethod.POST, 
consumes = {MediaType.APPLICATION_FORM_URLENCODED_VALUE})
public @ResponseBody List<PatientProfileDto> getPatientDetails(
    @RequestParam Map<String, String> name) {
   List<PatientProfileDto> list = new ArrayList<PatientProfileDto>();
   ...
   PatientProfileDto patientProfileDto = mapToPatientProfileDto(mame);
   ...
   list = service.getPatient(patientProfileDto);
   return list;
}

How do you return a JSON object from a Java Servlet

By Using Gson you can send json response see below code

You can see this code

@WebServlet(urlPatterns = {"/jsonResponse"})
public class JsonResponse extends HttpServlet {

@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    response.setContentType("application/json");
    response.setCharacterEncoding("utf-8");
    Student student = new Student(12, "Ram Kumar", "Male", "1234565678");
    Subject subject1 = new Subject(1, "Computer Fundamentals");
    Subject subject2 = new Subject(2, "Computer Graphics");
    Subject subject3 = new Subject(3, "Data Structures");
    Set subjects = new HashSet();
    subjects.add(subject1);
    subjects.add(subject2);
    subjects.add(subject3);
    student.setSubjects(subjects);
    Address address = new Address(1, "Street 23 NN West ", "Bhilai", "Chhattisgarh", "India");
    student.setAddress(address);
    Gson gson = new Gson();
    String jsonData = gson.toJson(student);
    PrintWriter out = response.getWriter();
    try {
        out.println(jsonData);
    } finally {
        out.close();
    }

  }
}

helpful from json response from servlet in java

How do I change the font size of a UILabel in Swift?

I used fontWithSize for a label with light system font, but it changes back to normal system font.

If you want to keep the font's traits, better to include the descriptors.

label.font = UIFont(descriptor: label.font.fontDescriptor(), size: 16.0)

Converting an int to std::string

boost::lexical_cast<std::string>(yourint) from boost/lexical_cast.hpp

Work's for everything with std::ostream support, but is not as fast as, for example, itoa

It even appears to be faster than stringstream or scanf:

How to write a SQL DELETE statement with a SELECT statement in the WHERE clause?

Your second DELETE query was nearly correct. Just be sure to put the table name (or an alias) between DELETE and FROM to specify which table you are deleting from. This is simpler than using a nested SELECT statement like in the other answers.

Corrected Query (option 1: using full table name):

DELETE tableA
FROM tableA
INNER JOIN tableB u on (u.qlabel = tableA.entityrole AND u.fieldnum = tableA.fieldnum) 
WHERE (LENGTH(tableA.memotext) NOT IN (8,9,10)
OR tableA.memotext NOT LIKE '%/%/%')
AND (u.FldFormat = 'Date')

Corrected Query (option 2: using an alias):

DELETE q
FROM tableA q
INNER JOIN tableB u on (u.qlabel = q.entityrole AND u.fieldnum = q.fieldnum) 
WHERE (LENGTH(q.memotext) NOT IN (8,9,10) 
OR q.memotext NOT LIKE '%/%/%')
AND (u.FldFormat = 'Date')

More examples here:
How to Delete using INNER JOIN with SQL Server?

Checkboxes in web pages – how to make them bigger?

In case this can help anyone, here's simple CSS as a jumping off point. Turns it into a basic rounded square big enough for thumbs with a toggled background color.

_x000D_
_x000D_ 
input[type='checkbox'] {_x000D_
    -webkit-appearance:none;_x000D_
    width:30px;_x000D_
    height:30px;_x000D_
    background:white;_x000D_
    border-radius:5px;_x000D_
    border:2px solid #555;_x000D_
}_x000D_
input[type='checkbox']:checked {_x000D_
    background: #abd;_x000D_
}
_x000D_ 
<input type="checkbox" />
_x000D_
_x000D_
_x000D_

how to avoid a new line with p tag?

I came across this for css

span, p{overflow:hidden; white-space: nowrap;}

via similar stackoverflow question

Javascript to check whether a checkbox is being checked or unchecked

You should be evaluating against the checked property of the checkbox element. 

for (i=0; i<arrChecks.length; i++)
{
    var attribute = arrChecks[i].getAttribute("xid")
    if (attribute == elementName)
    {
        // if the current state is checked, unchecked and vice-versa
        if (arrChecks[i].checked)
        {
            arrChecks[i].checked = false;
        } else {
            arrChecks[i].checked = true;
        }

    } else {
        arrChecks[i].checked = false;
    }
}

Auto-increment on partial primary key with Entity Framework Core

First of all you should not merge the Fluent Api with the data annotation so I would suggest you to use one of the below:

make sure you have correclty set the keys

modelBuilder.Entity<Foo>()
            .HasKey(p => new { p.Name, p.Id });
modelBuilder.Entity<Foo>().Property(p => p.Id).HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);

OR you can achieve it using data annotation as well 

public class Foo
{
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    [Key, Column(Order = 0)]
    public int Id { get; set; }

    [Key, Column(Order = 1)]
    public string Name{ get; set; }
}

Serializing class instance to JSON

I just do:

data=json.dumps(myobject.__dict__)

This is not the full answer, and if you have some sort of complicated object class you certainly will not get everything. However I use this for some of my simple objects.

One that it works really well on is the "options" class that you get from the OptionParser module. Here it is along with the JSON request itself. 

  def executeJson(self, url, options):
        data=json.dumps(options.__dict__)
        if options.verbose:
            print data
        headers = {'Content-type': 'application/json', 'Accept': 'text/plain'}
        return requests.post(url, data, headers=headers)

Mysql - How to quit/exit from stored procedure

 
CREATE PROCEDURE SP_Reporting(IN tablename VARCHAR(20))
proc_label:BEGIN
     IF tablename IS NULL THEN
          LEAVE proc_label;
     END IF;

     #proceed the code
END;

Case Insensitive String comp in C

Simple solution:

int str_case_ins_cmp(const char* a, const char* b) {
  int rc;

  while (1) {
    rc = tolower((unsigned char)*a) - tolower((unsigned char)*b);
    if (rc || !*a) {
      break;
    }

    ++a;
    ++b;
  }

  return rc;
}

WAMP Server ERROR "Forbidden You don't have permission to access /phpmyadmin/ on this server."

Go to C:\wamp\alias. Open the file phpmyadmin.conf and add

Options Indexes FollowSymLinks MultiViews
AllowOverride all
Order Deny,Allow
Deny from all
Allow from 127.0.0.1
Allow from MACHINE_IP

What range of values can integer types store in C++

To find out the limits on your system:

#include <iostream>
#include <limits>
int main(int, char **) {
  std::cout
    << static_cast< int >(std::numeric_limits< char >::max()) << "\n"
    << static_cast< int >(std::numeric_limits< unsigned char >::max()) << "\n"
    << std::numeric_limits< short >::max() << "\n"
    << std::numeric_limits< unsigned short >::max() << "\n"
    << std::numeric_limits< int >::max() << "\n"
    << std::numeric_limits< unsigned int >::max() << "\n"
    << std::numeric_limits< long >::max() << "\n"
    << std::numeric_limits< unsigned long >::max() << "\n"
    << std::numeric_limits< long long >::max() << "\n"
    << std::numeric_limits< unsigned long long >::max() << "\n";
}

Note that long long is only legal in C99 and in C++11.

Generating UNIQUE Random Numbers within a range

The best way to generate the unique random number is 

<?php
     echo md5(uniqid(mt_rand(), true).microtime(true));
?>

How to overcome TypeError: unhashable type: 'list'

The TypeError is happening because k is a list, since it is created using a slice from another list with the line k = list[0:j]. This should probably be something like k = ' '.join(list[0:j]), so you have a string instead.

In addition to this, your if statement is incorrect as noted by Jesse's answer, which should read if k not in d or if not k in d (I prefer the latter).

You are also clearing your dictionary on each iteration since you have d = {} inside of your for loop.

Note that you should also not be using list or file as variable names, since you will be masking builtins.

Here is how I would rewrite your code:

d = {}
with open("filename.txt", "r") as input_file:
    for line in input_file:
        fields = line.split()
        j = fields.index("x")
        k = " ".join(fields[:j])
        d.setdefault(k, []).append(" ".join(fields[j+1:]))

The dict.setdefault() method above replaces the if k not in d logic from your code.

Getting value of selected item in list box as string

Elaborating on previous answer by Pir Fahim, he's right but i'm using selectedItem.Text (only way to make it work to me)

Use the SelectedIndexChanged() event to store the data somewhere. In my case, i usually fill a custom class, something like:

class myItem {
    string name {get; set;}
    string price {get; set;}
    string desc {get; set;}
}

private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
     myItem selected_item = new myItem();
     selected_item.name  = listBox1.SelectedItem.Text;
     Retrieve (selected_item.name);
}

And then you can retrieve the rest of data from a List of "myItems"..

myItem Retrieve (string wanted_item) {
    foreach (myItem item in my_items_list) {
        if (item.name == wanted_item) {
               // This is the selected item
               return item; 
        }
    }
    return null;
}

Text in a flex container doesn't wrap in IE11

I did not find my solution here, maybe someone will be useful:

.child-with-overflowed-text{
  word-wrap: break-all;
}

Good luck!

Convert base64 string to image

To decode:

byte[] image = Base64.getDecoder().decode(base64string);

To encode:

String text = Base64.getEncoder().encodeToString(imageData);

What is the difference between HTTP 1.1 and HTTP 2.0?

HTTP 2.0 is a binary protocol that multiplexes numerous streams going over a single (normally TLS-encrypted) TCP connection.

The contents of each stream are HTTP 1.1 requests and responses, just encoded and packed up differently. HTTP2 adds a number of features to manage the streams, but leaves old semantics untouched.

No @XmlRootElement generated by JAXB

I just was struggling for a while with the same problem and just want to post my final result which works fine for me. So the base problems have been:

  • I have to generate xml strings from JAXB class instances with have no XmlRootElement annotations
  • The classes need additional classes to be bound for the marshalling process

The following class works fine for this problem:

public class Object2XmlConverter {

    public static <T> String convertToString(final T jaxbInstance, final Class<?>... additionalClasses)
            throws JAXBException {
        final Class<T> clazz = (Class<T>) jaxbInstance.getClass();

        final JAXBContext jaxbContext;
        if (additionalClasses.length > 0) {
            // this path is only necessary if you need additional classes to be bound
            jaxbContext = JAXBContext.newInstance(addClassesToBeBound(clazz, additionalClasses));
        } else {
            jaxbContext = JAXBContext.newInstance(clazz);
        }

        final QName qname = new QName("", jaxbInstance.getClass().getSimpleName());
        final JAXBElement<T> jaxbElement = new JAXBElement<T>(qname, clazz, null, jaxbInstance);

        final Marshaller jaxbMarshaller = jaxbContext.createMarshaller();
        jaxbMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);

        final StringWriter stringWriter = new StringWriter();
        jaxbMarshaller.marshal(jaxbElement, stringWriter);
        return stringWriter.toString();
    }

    private static <T> Class<?>[] addClassesToBeBound(final Class<T> clazz, final Class<?>[] additionalClasses) {
        final Class<?>[] classArray = new Class<?>[additionalClasses.length + 1];
        for (int i = 0; i < additionalClasses.length; i++) {
            classArray[i] = additionalClasses[i];
        }
        classArray[classArray.length - 1] = clazz;
        return classArray;
    }

    public static void main(final String[] args) throws Exception {
        final Ns1TargetHeaderTyp dataTyp = ...;
        System.out.println(convertToString(dataTyp));
    }
}

HTTP Error 404.3-Not Found in IIS 7.5

In my case, along with Mekanik's suggestions, I was receiving this error in Windows Server 2012 and I had to tick "HTTP Activation" in "Add Role Services".

How do I get the path of the Python script I am running in?

7.2 of Dive Into Python: Finding the Path.

import sys, os

print('sys.argv[0] =', sys.argv[0])             
pathname = os.path.dirname(sys.argv[0])        
print('path =', pathname)
print('full path =', os.path.abspath(pathname))

How to handle anchor hash linking in AngularJS

I was trying to make my Angular app scroll to an anchor opon loading and ran into the URL rewriting rules of $routeProvider.

After long experimentation I settled on this:

  1. register a document.onload event handler from the .run() section of the Angular app module.
  2. in the handler find out what the original has anchor tag was supposed to be by doing some string operations.
  3. override location.hash with the stripped down anchor tag (which causes $routeProvider to immediately overwrite it again with it's "#/" rule. But that is fine, because Angular is now in sync with what is going on in the URL 4) call $anchorScroll().

_x000D_
_x000D_ 
angular.module("bla",[]).}])_x000D_
.run(function($location, $anchorScroll){_x000D_
         $(document).ready(function() {_x000D_
  if(location.hash && location.hash.length>=1)      {_x000D_
   var path = location.hash;_x000D_
   var potentialAnchor = path.substring(path.lastIndexOf("/")+1);_x000D_
   if ($("#" + potentialAnchor).length > 0) {   // make sure this hashtag exists in the doc.                          _x000D_
       location.hash = potentialAnchor;_x000D_
       $anchorScroll();_x000D_
   }_x000D_
  }  _x000D_
 });
_x000D_
_x000D_
_x000D_

PowerShell: Run command from script's directory

Well I was looking for solution for this for a while, without any scripts just from CLI. This is how I do it xD:

  • Navigate to folder from which you want to run script (important thing is that you have tab completions)

    ..\..\dir

  • Now surround location with double quotes, and inside them add cd, so we could invoke another instance of powershell.

    "cd ..\..\dir"

  • Add another command to run script separated by ;, with is a command separator in powershell

    "cd ..\..\dir\; script.ps1"

  • Finally Run it with another instance of powershell

    start powershell "cd..\..\dir\; script.ps1"

This will open new powershell window, go to ..\..\dir, run script.ps1 and close window.

Note that ";" just separates commands, like you typed them one by one, if first fails second will run and next after, and next after... If you wanna keep new powershell window open you add -noexit in passed command . Note that I first navigate to desired folder so I could use tab completions (you couldn't in double quotes).

start powershell "-noexit cd..\..\dir\; script.ps1"

Use double quotes "" so you could pass directories with spaces in names e.g.,

start powershell "-noexit cd '..\..\my dir'; script.ps1"

updating table rows in postgres using subquery

If there are no performance gains using a join, then I prefer Common Table Expressions (CTEs) for readability:

WITH subquery AS (
    SELECT address_id, customer, address, partn
    FROM  /* big hairy SQL */ ...
)
UPDATE dummy
SET customer = subquery.customer,
    address  = subquery.address,
    partn    = subquery.partn
FROM subquery
WHERE dummy.address_id = subquery.address_id;

IMHO a bit more modern.

How to do a logical OR operation for integer comparison in shell scripting?

If a bash script 

If [[ $input -gt number  ||  $input  -lt number  ]]
then 
    echo .........
else
    echo .........

fi

exit

Returning data from Axios API

You can use Async - Await:

async function axiosTest() {
  const response = await axios.get(url);
  const data = await response.json();  
}

How do I change the default schema in sql developer?

 
alter session set current_schema = otheruser;

should do the trick.

Could not obtain information about Windows NT group user

I just got this error and it turns out my AD administrator deleted the service account used by EVERY SQL Server instance in the entire company. Thank goodness AD has its own recycle bin.

See if you can run the Active Directory Users and Computers utility (%SystemRoot%\system32\dsa.msc), and check to make sure the account you are relying on still exists.

Rendering React Components from Array of Objects

this.data presumably contains all the data, so you would need to do something like this:

var stations = [];
var stationData = this.data.stations;

for (var i = 0; i < stationData.length; i++) {
    stations.push(
        <div key={stationData[i].call} className="station">
            Call: {stationData[i].call}, Freq: {stationData[i].frequency}
        </div>
    )
}

render() {
  return (
    <div className="stations">{stations}</div>
  )
}

Or you can use map and arrow functions if you're using ES6:

const stations = this.data.stations.map(station =>
    <div key={station.call} className="station">
      Call: {station.call}, Freq: {station.frequency}
    </div>
);

What is the purpose of the "role" attribute in HTML?

Role attribute mainly improve accessibility for people using screen readers. For several cases we use it such as accessibility, device adaptation,server-side processing, and complex data description. Know more click: https://www.w3.org/WAI/PF/HTML/wiki/RoleAttribute.

Why does only the first line of this Windows batch file execute but all three lines execute in a command shell?

To execute more Maven builds from one script you shall use the Windows call function in the following way:

call mvn install:install-file -DgroupId=gdata -DartifactId=base -Dversion=1.0 -Dfile=gdata-base-1.0.jar  -Dpackaging=jar -DgeneratePom=true
call mvn install:install-file -DgroupId=gdata -DartifactId=blogger -Dversion=2.0 -Dfile=gdata-blogger-2.0.jar  -Dpackaging=jar -DgeneratePom=true
call mvn install:install-file -DgroupId=gdata -DartifactId=blogger-meta -Dversion=2.0 -Dfile=gdata-blogger-meta-2.0.jar  -Dpackaging=jar -DgeneratePom=true

Undoing a git rebase

I actually put a backup tag on the branch before I do any nontrivial operation (most rebases are trivial, but I'd do that if it looks anywhere complex).

Then, restoring is as easy as git reset --hard BACKUP.

Clang vs GCC for my Linux Development project

EDIT:

The gcc guys really improved the diagnosis experience in gcc (ah competition). They created a wiki page to showcase it here. gcc 4.8 now has quite good diagnostics as well (gcc 4.9x added color support). Clang is still in the lead, but the gap is closing.

Original:

For students, I would unconditionally recommend Clang.

The performance in terms of generated code between gcc and Clang is now unclear (though I think that gcc 4.7 still has the lead, I haven't seen conclusive benchmarks yet), but for students to learn it does not really matter anyway.

On the other hand, Clang's extremely clear diagnostics are definitely easier for beginners to interpret.

Consider this simple snippet:

#include <string>
#include <iostream>

struct Student {
std::string surname;
std::string givenname;
}

std::ostream& operator<<(std::ostream& out, Student const& s) {
  return out << "{" << s.surname << ", " << s.givenname << "}";
}

int main() {
  Student me = { "Doe", "John" };
  std::cout << me << "\n";
}

You'll notice right away that the semi-colon is missing after the definition of the Student class, right :) ?

Well, gcc notices it too, after a fashion:

prog.cpp:9: error: expected initializer before ‘&’ token
prog.cpp: In function ‘int main()’:
prog.cpp:15: error: no match for ‘operator<<’ in ‘std::cout << me’
/usr/lib/gcc/i686-pc-linux-gnu/4.3.4/include/g++-v4/ostream:112: note: candidates are: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(std::basic_ostream<_CharT, _Traits>& (*)(std::basic_ostream<_CharT, _Traits>&)) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i686-pc-linux-gnu/4.3.4/include/g++-v4/ostream:121: note:                 std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(std::basic_ios<_CharT, _Traits>& (*)(std::basic_ios<_CharT, _Traits>&)) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i686-pc-linux-gnu/4.3.4/include/g++-v4/ostream:131: note:                 std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(std::ios_base& (*)(std::ios_base&)) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i686-pc-linux-gnu/4.3.4/include/g++-v4/ostream:169: note:                 std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(long int) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i686-pc-linux-gnu/4.3.4/include/g++-v4/ostream:173: note:                 std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(long unsigned int) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i686-pc-linux-gnu/4.3.4/include/g++-v4/ostream:177: note:                 std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(bool) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i686-pc-linux-gnu/4.3.4/include/g++-v4/bits/ostream.tcc:97: note:                 std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(short int) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i686-pc-linux-gnu/4.3.4/include/g++-v4/ostream:184: note:                 std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(short unsigned int) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i686-pc-linux-gnu/4.3.4/include/g++-v4/bits/ostream.tcc:111: note:                 std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(int) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i686-pc-linux-gnu/4.3.4/include/g++-v4/ostream:195: note:                 std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(unsigned int) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i686-pc-linux-gnu/4.3.4/include/g++-v4/ostream:204: note:                 std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(long long int) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i686-pc-linux-gnu/4.3.4/include/g++-v4/ostream:208: note:                 std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(long long unsigned int) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i686-pc-linux-gnu/4.3.4/include/g++-v4/ostream:213: note:                 std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(double) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i686-pc-linux-gnu/4.3.4/include/g++-v4/ostream:217: note:                 std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(float) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i686-pc-linux-gnu/4.3.4/include/g++-v4/ostream:225: note:                 std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(long double) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i686-pc-linux-gnu/4.3.4/include/g++-v4/ostream:229: note:                 std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(const void*) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/lib/gcc/i686-pc-linux-gnu/4.3.4/include/g++-v4/bits/ostream.tcc:125: note:                 std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(std::basic_streambuf<_CharT, _Traits>*) [with _CharT = char, _Traits = std::char_traits<char>]

And Clang is not exactly starring here either, but still:

/tmp/webcompile/_25327_1.cc:9:6: error: redefinition of 'ostream' as different kind of symbol
std::ostream& operator<<(std::ostream& out, Student const& s) {
     ^
In file included from /tmp/webcompile/_25327_1.cc:1:
In file included from /usr/include/c++/4.3/string:49:
In file included from /usr/include/c++/4.3/bits/localefwd.h:47:
/usr/include/c++/4.3/iosfwd:134:33: note: previous definition is here
  typedef basic_ostream<char>           ostream;        ///< @isiosfwd
                                        ^
/tmp/webcompile/_25327_1.cc:9:13: error: expected ';' after top level declarator
std::ostream& operator<<(std::ostream& out, Student const& s) {
            ^
            ;
2 errors generated.

I purposefully choose an example which triggers an unclear error message (coming from an ambiguity in the grammar) rather than the typical "Oh my god Clang read my mind" examples. Still, we notice that Clang avoids the flood of errors. No need to scare students away.

Submitting form and pass data to controller method of type FileStreamResult

This is because you have specified the form method as GET

Change code in the view to this:

using (@Html.BeginForm("myMethod", "Home", FormMethod.Post, new { id = @item.JobId })){
}

jquery - is not a function error

This problem is "best" solved by using an anonymous function to pass-in the jQuery object thusly:

The Anonymous Function Looks Like:

<script type="text/javascript">
    (function($) {
        // You pass-in jQuery and then alias it with the $-sign
        // So your internal code doesn't change
    })(jQuery);
</script>

This is JavaScript's method of implementing (poor man's) 'Dependency Injection' when used alongside things like the 'Module Pattern'.

So Your Code Would Look Like:
Of course, you might want to make some changes to your internal code now, but you get the idea.

<script type="text/javascript">
    (function($) {
        $.fn.pluginbutton = function(options) {
            myoptions = $.extend({ left: true });
            return this.each(function() {
                var focus = false;
                if (focus === false) {
                    this.hover(function() {
                        this.animate({ backgroundPosition: "0 -30px" }, { duration: 0 });
                        this.removeClass('VBfocus').addClass('VBHover');
                    }, function() {
                        this.animate({ backgroundPosition: "0 0" }, { duration: 0 });
                        this.removeClass('VBfocus').removeClass('VBHover');
                    });
                }
                this.mousedown(function() {
                    focus = true
                    this.animate({ backgroundPosition: "0 30px" }, { duration: 0 });
                    this.addClass('VBfocus').removeClass('VBHover');
                }, function() {
                    focus = false;
                    this.animate({ backgroundPosition: "0 0" }, { duration: 0 });
                    this.removeClass('VBfocus').addClass('VBHover');
                });
            });
        }
    })(jQuery);
</script>

Show just the current branch in Git

I guess this should be quick and can be used with a Python API:

git branch --contains HEAD
* master

Check if multiple strings exist in another string

 
a = ['a', 'b', 'c']
str =  "a123"

a_match = [True for match in a if match in str]

if True in a_match:
  print "some of the strings found in str"
else:
  print "no strings found in str"

Word count from a txt file program

 
FILE_NAME = 'file.txt'

wordCounter = {}

with open(FILE_NAME,'r') as fh:
  for line in fh:
    # Replacing punctuation characters. Making the string to lower.
    # The split will spit the line into a list.
    word_list = line.replace(',','').replace('\'','').replace('.','').lower().split()
    for word in word_list:
      # Adding  the word into the wordCounter dictionary.
      if word not in wordCounter:
        wordCounter[word] = 1
      else:
        # if the word is already in the dictionary update its count.
        wordCounter[word] = wordCounter[word] + 1

print('{:15}{:3}'.format('Word','Count'))
print('-' * 18)

# printing the words and its occurrence.
for  (word,occurance)  in wordCounter.items(): 
  print('{:15}{:3}'.format(word,occurance))
# 
    Word           Count
    ------------------
    of               6
    examples         2
    used             2
    development      2
    modified         2
    open-source      2

python dict to numpy structured array

You could use np.array(list(result.items()), dtype=dtype):

import numpy as np
result = {0: 1.1181753789488595, 1: 0.5566080288678394, 2: 0.4718269778030734, 3: 0.48716683119447185, 4: 1.0, 5: 0.1395076201641266, 6: 0.20941558441558442}

names = ['id','data']
formats = ['f8','f8']
dtype = dict(names = names, formats=formats)
array = np.array(list(result.items()), dtype=dtype)

print(repr(array))

yields

array([(0.0, 1.1181753789488595), (1.0, 0.5566080288678394),
       (2.0, 0.4718269778030734), (3.0, 0.48716683119447185), (4.0, 1.0),
       (5.0, 0.1395076201641266), (6.0, 0.20941558441558442)], 
      dtype=[('id', '<f8'), ('data', '<f8')])

If you don't want to create the intermediate list of tuples, list(result.items()), then you could instead use np.fromiter:

In Python2:

array = np.fromiter(result.iteritems(), dtype=dtype, count=len(result))

In Python3:

array = np.fromiter(result.items(), dtype=dtype, count=len(result))

Why using the list [key,val] does not work:

By the way, your attempt, 

numpy.array([[key,val] for (key,val) in result.iteritems()],dtype)

was very close to working. If you change the list [key, val] to the tuple (key, val), then it would have worked. Of course, 

numpy.array([(key,val) for (key,val) in result.iteritems()], dtype)

is the same thing as 

numpy.array(result.items(), dtype)

in Python2, or

numpy.array(list(result.items()), dtype)

in Python3.

np.array treats lists differently than tuples: Robert Kern explains:

As a rule, tuples are considered "scalar" records and lists are recursed upon. This rule helps numpy.array() figure out which sequences are records and which are other sequences to be recursed upon; i.e. which sequences create another dimension and which are the atomic elements.

Since (0.0, 1.1181753789488595) is considered one of those atomic elements, it should be a tuple, not a list.

Check if a varchar is a number (TSQL)

Neizan's code lets values of just a "." through. At the risk of getting too pedantic, I added one more AND clause.

declare @MyTable table(MyVar nvarchar(10));
insert into @MyTable (MyVar) 
values 
    (N'1234')
    , (N'000005')
    , (N'1,000')
    , (N'293.8457')
    , (N'x')
    , (N'+')
    , (N'293.8457.')
    , (N'......')
    , (N'.')
    ;

-- This shows that Neizan's answer allows "." to slip through.
select * from (
    select 
        MyVar
        , case when MyVar not like N'%[^0-9.]%' then 1 else 0 end as IsNumber 
    from 
        @MyTable
) t order by IsNumber;

-- Notice the addition of "and MyVar not like '.'".
select * from (
    select 
        MyVar
        , case when MyVar not like N'%[^0-9.]%' and MyVar not like N'%.%.%' and MyVar not like '.' then 1 else 0 end as IsNumber 
    from 
        @MyTable
) t 
order by IsNumber;

Mysql database sync between two databases

Have a look at Schema and Data Comparison tools in dbForge Studio for MySQL. These tool will help you to compare, to see the differences, generate a synchronization script and synchronize two databases.

C# int to byte[]

If you want more general information about various methods of representing numbers including Two's Complement have a look at:

Two's Complement and Signed Number Representation on Wikipedia

Vertical align text in block element

You can also try

a {
  height:100px;
  line-height:100px;
}

How to transfer data from JSP to servlet when submitting HTML form

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

public void doPost(HttpServletRequest req, HttpServletResponse resp){

}

and

public void doGet(HttpServletRequest req, HttpServletResponse resp){

}

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

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

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

Statistics: combinations in Python

It's pretty easy with sympy.

import sympy

comb = sympy.binomial(n, r)

Passing arrays as url parameter

Easiest way would be to use the serialize function.

It serializes any variable for storage or transfer. You can read about it in the php manual - serialize

The variable can be restored by using unserialize

So in the passing to the URL you use:

$url = urlencode(serialize($array))

and to restore the variable you use

$var = unserialize(urldecode($_GET['array']))

Be careful here though. The maximum size of a GET request is limited to 4k, which you can easily exceed by passing arrays in a URL.

Also, its really not quite the safest way to pass data! You should probably look into using sessions instead.

What does "Use of unassigned local variable" mean?

Not all code paths set a value for lateFee. You may want to set a default value for it at the top.

How do I run a Python program in the Command Prompt in Windows 7?

You need to edit the environment variable named PATH, and add ;c:\python27 to the end of that. The semicolon separates one pathname from another (you will already have several things in your PATH).

Alternately, you can just type

c:\python27\python

at the command prompt without having to modify any environment variables at all.

get the latest fragment in backstack

Kotlin Developers can use this to get the current fragment:

        supportFragmentManager.addOnBackStackChangedListener {
        val myFragment = supportFragmentManager.fragments.last()

        if (null != myFragment && myFragment is HomeFragment) {
            //HomeFragment is visible or currently loaded
        } else {
            //your code
        }
    }

How can I check whether a variable is defined in Node.js?

For easy tasks I often simply do it like:

var undef;

// Fails on undefined variables
if (query !== undef) {
    // variable is defined
} else {
    // else do this
}

Or if you simply want to check for a nulled value too..

var undef;

// Fails on undefined variables
// And even fails on null values
if (query != undef) {
    // variable is defined and not null
} else {
    // else do this
}

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

Are you asking in php or javascript.

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

If it is in js, use getElementById for that