How to get parameters from the URL with JSP

String accountID = request.getParameter("accountID");

how to call a method in another Activity from Activity

Declare a SecondActivity variable in FirstActivity

Like this

public class FirstActivity extends Activity {  

SecondActivity secactivity;

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main2);
  }      

  public void method() {
    // some code

  secactivity.call_method();// 'Method' is Name of the any one method in SecondActivity

  }  
}

Using this format you can call any method from one activity to another.

List<T> or IList<T>

You would because defining an IList or an ICollection would open up for other implementations of your interfaces.

You might want to have an IOrderRepository that defines a collection of orders in either a IList or ICollection. You could then have different kinds of implementations to provide a list of orders as long as they conform to "rules" defined by your IList or ICollection.

How/when to use ng-click to call a route?

I used ng-click directive to call a function, while requesting route templateUrl, to decide which <div> has to be show or hide inside route templateUrl page or for different scenarios.

AngularJS 1.6.9

Lets see an example, when in routing page, I need either the add <div> or the edit <div>, which I control using the parent controller models $scope.addProduct and $scope.editProduct boolean.

RoutingTesting.html

_x000D_

<!DOCTYPE html>_x000D_
<html lang="en">_x000D_
<head>_x000D_
    <meta charset="UTF-8">_x000D_
    <title>Testing</title>_x000D_
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>_x000D_
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular-route.min.js"></script>_x000D_
    <script>_x000D_
        var app = angular.module("MyApp", ["ngRoute"]);_x000D_
_x000D_
        app.config(function($routeProvider){_x000D_
            $routeProvider_x000D_
                .when("/TestingPage", {_x000D_
                    templateUrl: "TestingPage.html"_x000D_
                });_x000D_
        });_x000D_
_x000D_
        app.controller("HomeController", function($scope, $location){_x000D_
_x000D_
            $scope.init = function(){_x000D_
                $scope.addProduct = false;_x000D_
                $scope.editProduct = false;_x000D_
            }_x000D_
_x000D_
            $scope.productOperation = function(operationType, productId){_x000D_
                $scope.addProduct = false;_x000D_
                $scope.editProduct = false;_x000D_
_x000D_
                if(operationType === "add"){_x000D_
                    $scope.addProduct = true;_x000D_
                    console.log("Add productOperation requested...");_x000D_
                }else if(operationType === "edit"){_x000D_
                    $scope.editProduct = true;_x000D_
                    console.log("Edit productOperation requested : " + productId);_x000D_
                }_x000D_
_x000D_
                //*************** VERY IMPORTANT NOTE ***************_x000D_
                //comment this $location.path("..."); line, when using <a> anchor tags,_x000D_
                //only useful when <a> below given are commented, and using <input> controls_x000D_
                $location.path("TestingPage");_x000D_
            };_x000D_
_x000D_
        });_x000D_
    </script>_x000D_
</head>_x000D_
<body ng-app="MyApp" ng-controller="HomeController">_x000D_
_x000D_
    <div ng-init="init()">_x000D_
_x000D_
        <!-- Either use <a>anchor tag or input type=button -->_x000D_
_x000D_
        <!--<a href="#!TestingPage" ng-click="productOperation('add', -1)">Add Product</a>-->_x000D_
        <!--<br><br>-->_x000D_
        <!--<a href="#!TestingPage" ng-click="productOperation('edit', 10)">Edit Product</a>-->_x000D_
_x000D_
        <input type="button" ng-click="productOperation('add', -1)" value="Add Product"/>_x000D_
        <br><br>_x000D_
        <input type="button" ng-click="productOperation('edit', 10)" value="Edit Product"/>_x000D_
        <pre>addProduct : {{addProduct}}</pre>_x000D_
        <pre>editProduct : {{editProduct}}</pre>_x000D_
        <ng-view></ng-view>_x000D_
_x000D_
    </div>_x000D_
_x000D_
</body>_x000D_
</html>

_x000D_

TestingPage.html

_x000D_

<!DOCTYPE html>_x000D_
<html lang="en">_x000D_
<head>_x000D_
    <meta charset="UTF-8">_x000D_
    <title>Title</title>_x000D_
    <style>_x000D_
        .productOperation{_x000D_
            position:fixed;_x000D_
            top: 50%;_x000D_
            left: 50%;_x000D_
            width:30em;_x000D_
            height:18em;_x000D_
            margin-left: -15em; /*set to a negative number 1/2 of your width*/_x000D_
            margin-top: -9em; /*set to a negative number 1/2 of your height*/_x000D_
            border: 1px solid #ccc;_x000D_
            background: yellow;_x000D_
        }_x000D_
    </style>_x000D_
</head>_x000D_
<body>_x000D_
_x000D_
<div class="productOperation" >_x000D_
_x000D_
    <div ng-show="addProduct">_x000D_
        <h2 >Add Product enabled</h2>_x000D_
    </div>_x000D_
_x000D_
    <div ng-show="editProduct">_x000D_
        <h2>Edit Product enabled</h2>_x000D_
    </div>_x000D_
_x000D_
</div>_x000D_
_x000D_
</body>_x000D_
</html>

_x000D_

both pages - RoutingTesting.html(parent), TestingPage.html(routing page) are in the same directory,

Hope this will help someone.

C# testing to see if a string is an integer?

This function will tell you if your string contains ONLY the characters 0123456789.

private bool IsInt(string sVal)
{
    foreach (char c in sVal)
    {
         int iN = (int)c;
         if ((iN > 57) || (iN < 48))
            return false;
    }
    return true;
}

This is different from int.TryParse() which will tell you if your string COULD BE an integer.
eg. " 123\r\n" will return TRUE from int.TryParse() but FALSE from the above function.

...Just depends on the question you need to answer.

How to change the font and font size of an HTML input tag?

<input type ="text" id="txtComputer">

css

input[type="text"]
{
    font-size:24px;
}

Confusing "duplicate identifier" Typescript error message

This is because of the combination of two things:

tsconfig not having any files section. From http://www.typescriptlang.org/docs/handbook/tsconfig-json.html

If no "files" property is present in a tsconfig.json, the compiler defaults to including all files in the containing directory and subdirectories. When a "files" property is specified, only those files are included.
Including typescript as an npm dependency : node_modules/typescript/ This means that all of typescript gets included .... there is an implicitly included lib.d.ts in your project anyways (http://basarat.gitbook.io/typescript/content/docs/types/lib.d.ts.html) and its conflicting with the one that ships with the NPM version of typescript.

Fix

Either list files or include explicitly https://basarat.gitbook.io/typescript/docs/project/files.html

Open fancybox from function

Here is working code as per the author's Tips & Tricks blog post, put it in document ready:

  $("#mybutton").click(function(){
    $(".fancybox").trigger('click');  
  })

This triggers the smaller version of the currently displayed image or content, as if you had clicked on it manually. It avoids initializing the Fancybox again, but instead keeps the parameters you initialized it with on document ready. If you need to do something different when opening the box with a separate button compared to clicking on the box, you will need the parameters, but for many, this will be what they were looking for.

How to avoid a System.Runtime.InteropServices.COMException?

I came across System.Runtime.InteropServices.COMException while opening a project solution. Sometimes user doesn't have enough priveleges to run some COM Methods. I ran Visual Studio as Administrator and the exception was gone.

Collection was modified; enumeration operation may not execute

When a subscriber unsubscribes you are changing contents of the collection of Subscribers during enumeration.

There are several ways to fix this, one being changing the for loop to use an explicit .ToList():

public void NotifySubscribers(DataRecord sr)  
{
    foreach(Subscriber s in subscribers.Values.ToList())
    {
                                              ^^^^^^^^^  
        ...

Global npm install location on windows?

Just press windows button and type %APPDATA% and type enter.

Above is the location where you can find \npm\node_modules folder. This is where global modules sit in your system.

Plotting histograms from grouped data in a pandas DataFrame

With recent version of Pandas, you can do df.N.hist(by=df.Letter)

Just like with the solutions above, the axes will be different for each subplot. I have not solved that one yet.

Spring RequestMapping for controllers that produce and consume JSON

There are 2 annotations in Spring: @RequestBody and @ResponseBody. These annotations consumes, respectively produces JSONs. Some more info here.

Remove a HTML tag but keep the innerHtml

Another native solution (in coffee):

el = document.getElementsByTagName 'b'

docFrag = document.createDocumentFragment()
docFrag.appendChild el.firstChild while el.childNodes.length

el.parentNode.replaceChild docFrag, el

I don't know if it's faster than user113716's solution, but it might be easier to understand for some.

Calling ASP.NET MVC Action Methods from JavaScript

If you want to call an action from your JavaScript, one way is to embed your JavaScript code, inside your view (.cshtml file for example), and then, use Razor, to create a URL of that action:

$(function(){
    $('#sampleDiv').click(function(){
        /*
         While this code is JavaScript, but because it's embedded inside
         a cshtml file, we can use Razor, and create the URL of the action

         Don't forget to add '' around the url because it has to become a     
         valid string in the final webpage
        */

        var url = '@Url.Action("ActionName", "Controller")';
    });
});

Troubleshooting "The use statement with non-compound name ... has no effect"

Where is android studio building my .apk file?

For Android Studio:

If you haven't built the APK at least once, you might not find the /Outputs/APK folder. Go to Build in Android Studio and one of the last three options is Build APK, select that. It will then create that folder and you will find your APK file there.

How can I remove jenkins completely from linux

If your jenkins is running as service instead of process you should stop it first using

sudo service jenkins stop

After stopping it you can follow the normal flow of removing it using commands respective to your linux flavour

For centos it will be

sudo yum remove jenkins

For ubuntu it will

sudo apt-get remove --purge jenkins

I hope this will solve your issue.

Selenium Webdriver: Entering text into text field

I had a case where I was entering text into a field after which the text would be removed automatically. Turned out it was due to some site functionality where you had to press the enter key after entering the text into the field. So, after sending your barcode text with sendKeys method, send 'enter' directly after it. Note that you will have to import the selenium Keys class. See my code below.

import org.openqa.selenium.Keys;

String barcode="0000000047166";
WebElement element_enter = driver.findElement(By.xpath("//*[@id='div-barcode']"));
element_enter.findElement(By.xpath("your xpath")).sendKeys(barcode);

element_enter.sendKeys(Keys.RETURN); // this will result in the return key being pressed upon the text field

I hope it helps..

Java: How to Indent XML Generated by Transformer

Neither of the suggested solutions worked for me. So I kept on searching for an alternative solution, which ended up being a mixture of the two before mentioned and a third step.

set the indent-number into the transformerfactory
enable the indent in the transformer
wrap the otuputstream with a writer (or bufferedwriter)

//(1)
TransformerFactory tf = TransformerFactory.newInstance();
tf.setAttribute("indent-number", new Integer(2));

//(2)
Transformer t = tf.newTransformer();
t.setOutputProperty(OutputKeys.INDENT, "yes");

//(3)
t.transform(new DOMSource(doc),
new StreamResult(new OutputStreamWriter(out, "utf-8"));

You must do (3) to workaround a "buggy" behavior of the xml handling code.

Source: johnnymac75 @ http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6296446

(If I have cited my source incorrectly please let me know)

How to visualize an XML schema?

We use Liquid XML Studio, it provides a intuitive editable representation of an XSD schema. It also shows the annotations inline, which we find very useful and the split code/gfx view is invaluable when writting or editing an XSD.

Liquid XML Studio XSD Editor

How to make CREATE OR REPLACE VIEW work in SQL Server?

Borrowing from @Khan's answer, I would do:

IF OBJECT_ID('dbo.test_abc_def', 'V') IS NOT NULL
    DROP VIEW dbo.test_abc_def
GO

CREATE VIEW dbo.test_abc_def AS
SELECT 
    VCV.xxxx
    ,VCV.yyyy AS yyyy
    ,VCV.zzzz AS zzzz
FROM TABLE_A

MSDN Reference

Background color on input type=button :hover state sticks in IE

There might be a fix to <input type="button"> - but if there is, I don't know it.

Otherwise, a good option seems to be to replace it with a carefully styled a element.

Example: http://jsfiddle.net/Uka5v/

.button {
    background-color: #E3E1B8; 
    padding: 2px 4px;
    font: 13px sans-serif;
    text-decoration: none;
    border: 1px solid #000;
    border-color: #aaa #444 #444 #aaa;
    color: #000
}

Upsides include that the a element will style consistently between different (older) versions of Internet Explorer without any extra work, and I think my link looks nicer than that button :)

error: (-215) !empty() in function detectMultiScale

On OSX with a homebrew install the full path to the opencv folder should work:

face_cascade = cv2.CascadeClassifier('/usr/local/Cellar/opencv/3.4.0_1/share/OpenCV/haarcascades/haarcascade_frontalface_default.xml')
eye_cascade = cv2.CascadeClassifier('/usr/local/Cellar/opencv/3.4.0_1/share/OpenCV/haarcascades/haarcascade_eye.xml')

Take care of the version number in the path.

Spring - @Transactional - What happens in background?

This is a big topic. The Spring reference doc devotes multiple chapters to it. I recommend reading the ones on Aspect-Oriented Programming and Transactions, as Spring's declarative transaction support uses AOP at its foundation.

But at a very high level, Spring creates proxies for classes that declare @Transactional on the class itself or on members. The proxy is mostly invisible at runtime. It provides a way for Spring to inject behaviors before, after, or around method calls into the object being proxied. Transaction management is just one example of the behaviors that can be hooked in. Security checks are another. And you can provide your own, too, for things like logging. So when you annotate a method with @Transactional, Spring dynamically creates a proxy that implements the same interface(s) as the class you're annotating. And when clients make calls into your object, the calls are intercepted and the behaviors injected via the proxy mechanism.

Transactions in EJB work similarly, by the way.

As you observed, through, the proxy mechanism only works when calls come in from some external object. When you make an internal call within the object, you're really making a call through the "this" reference, which bypasses the proxy. There are ways of working around that problem, however. I explain one approach in this forum post in which I use a BeanFactoryPostProcessor to inject an instance of the proxy into "self-referencing" classes at runtime. I save this reference to a member variable called "me". Then if I need to make internal calls that require a change in the transaction status of the thread, I direct the call through the proxy (e.g. "me.someMethod()".) The forum post explains in more detail. Note that the BeanFactoryPostProcessor code would be a little different now, as it was written back in the Spring 1.x timeframe. But hopefully it gives you an idea. I have an updated version that I could probably make available.

malloc for struct and pointer in C

You could actually do this in a single malloc by allocating for the Vector and the array at the same time. Eg:

struct Vector y = (struct Vector*)malloc(sizeof(struct Vector) + 10*sizeof(double));
y->x = (double*)((char*)y + sizeof(struct Vector));
y->n = 10;

This allocates Vector 'y', then makes y->x point to the extra allocated data immediate after the Vector struct (but in the same memory block).

If resizing the vector is required, you should do it with the two allocations as recommended. The internal y->x array would then be able to be resized while keeping the vector struct 'y' intact.

How to get status code from webclient?

You can try this code to get HTTP status code from WebException or from OpenReadCompletedEventArgs.Error. It works in Silverlight too because SL does not have WebExceptionStatus.ProtocolError defined.

HttpStatusCode GetHttpStatusCode(System.Exception err)
{
    if (err is WebException)
    {
        WebException we = (WebException)err;
        if (we.Response is HttpWebResponse)
        {
            HttpWebResponse response = (HttpWebResponse)we.Response;
            return response.StatusCode;
        }
    }
    return 0;
}

How to add row in JTable?

Use:

DefaultTableModel model = new DefaultTableModel(); 
JTable table = new JTable(model); 

// Create a couple of columns 
model.addColumn("Col1"); 
model.addColumn("Col2"); 

// Append a row 
model.addRow(new Object[]{"v1", "v2"});

How to add Tomcat Server in eclipse

Go to Server tab
Click on No servers are available. Click this link to create a new server.
Select Tomcat V8.0 from server type list:
Provide path of server:
Click Finish.
You will see server added:
Right click->Start

Now you can run your web applications on server.

Java: method to get position of a match in a String?

int match_position=text.indexOf(match);

push_back vs emplace_back

emplace_back shouldn't take an argument of type vector::value_type, but instead variadic arguments that are forwarded to the constructor of the appended item.

template <class... Args> void emplace_back(Args&&... args);

It is possible to pass a value_type which will be forwarded to the copy constructor.

Because it forwards the arguments, this means that if you don't have rvalue, this still means that the container will store a "copied" copy, not a moved copy.

 std::vector<std::string> vec;
 vec.emplace_back(std::string("Hello")); // moves
 std::string s;
 vec.emplace_back(s); //copies

But the above should be identical to what push_back does. It is probably rather meant for use cases like:

 std::vector<std::pair<std::string, std::string> > vec;
 vec.emplace_back(std::string("Hello"), std::string("world")); 
 // should end up invoking this constructor:
 //template<class U, class V> pair(U&& x, V&& y);
 //without making any copies of the strings

How to retrieve SQL result column value using column name in Python?

import mysql.connector as mysql
...
cursor = mysql.cnx.cursor()
cursor.execute('select max(id) max_id from ids')
(id) = [ id for id in cursor ]

Using GCC to produce readable assembly?

I haven't given a shot to gcc, but in case of g++. The command below works for me. -g for debug build and -Wa,-adhln is passed to assembler for listing with source code

g++ -g -Wa,-adhln src.cpp

ValueError: could not broadcast input array from shape (224,224,3) into shape (224,224)

At least one item in your list is either not three dimensional, or its second or third dimension does not match the other elements. If only the first dimension does not match, the arrays are still matched, but as individual objects, no attempt is made to reconcile them into a new (four dimensional) array. Some examples are below:

That is, the offending element's shape != (?, 224, 3),
or ndim != 3 (with the ? being non-negative integer).
That is what is giving you the error.

You'll need to fix that, to be able to turn your list into a four (or three) dimensional array. Without context, it is impossible to say if you want to lose a dimension from the 3D items or add one to the 2D items (in the first case), or change the second or third dimension (in the second case).

Here's an example of the error:

>>> a = [np.zeros((224,224,3)), np.zeros((224,224,3)), np.zeros((224,224))]
>>> np.array(a)
ValueError: could not broadcast input array from shape (224,224,3) into shape (224,224)

or, different type of input, but the same error:

>>> a = [np.zeros((224,224,3)), np.zeros((224,224,3)), np.zeros((224,224,13))]
>>> np.array(a)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: could not broadcast input array from shape (224,224,3) into shape (224,224)

Alternatively, similar but with a different error message:

>>> a = [np.zeros((224,224,3)), np.zeros((224,224,3)), np.zeros((224,100,3))]
>>> np.array(a)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: could not broadcast input array from shape (224,224,3) into shape (224)

But the following will work, albeit with different results than (presumably) intended:

>>> a = [np.zeros((224,224,3)), np.zeros((224,224,3)), np.zeros((10,224,3))]
>>> np.array(a)
# long output omitted
>>> newa = np.array(a)
>>> newa.shape
3  # oops
>>> newa.dtype
dtype('O')
>>> newa[0].shape
(224, 224, 3)
>>> newa[1].shape
(224, 224, 3)
>>> newa[2].shape
(10, 224, 3)
>>>

Convert objective-c typedef to its string equivalent

I use a variation on Barry Walk's answer, that in order of importance:

Allows the compiler to check for missing case clauses (it can't if you have a default clause).
Uses an Objective-C typical name (rather than a Java like name).
Raises a specific exception.
Is shorter.

EG:

- (NSString*)describeFormatType:(FormatType)formatType {    
    switch(formatType) {
        case JSON:
            return @"JSON";
        case XML:
            return @"XML";
        case Atom:
            return @"Atom";
        case RSS:
            return @"RSS";
    }
    [NSException raise:NSInvalidArgumentException format:@"The given format type number, %ld, is not known.", formatType];
    return nil; // Keep the compiler happy - does not understand above line never returns!
}

How do I determine k when using k-means clustering?

Assuming you have a matrix of data called DATA, you can perform partitioning around medoids with estimation of number of clusters (by silhouette analysis) like this:

library(fpc)
maxk <- 20  # arbitrary here, you can set this to whatever you like
estimatedK <- pamk(dist(DATA), krange=1:maxk)$nc

Visual Studio Expand/Collapse keyboard shortcuts

As you can see, there are several ways to achieve this.

I personally use:

Expand all: CTRL + M + L

Collapse all: CTRL + M + O

Bonus:

Expand/Collapse on cursor location: CTRL + M + M

How to prevent Right Click option using jquery

$(document).ready(function () {

        $("img").on('contextmenu', function (e) {
           e.preventDefault();
        });

});

How to change legend size with matplotlib.pyplot

There are multiple settings for adjusting the legend size. The two I find most useful are:

labelspacing: which sets the spacing between label entries in multiples of the font size. For instance with a 10 point font, legend(..., labelspacing=0.2) will reduce the spacing between entries to 2 points. The default on my install is about 0.5.
prop: which allows full control of the font size, etc. You can set an 8 point font using legend(..., prop={'size':8}). The default on my install is about 14 points.

In addition, the legend documentation lists a number of other padding and spacing parameters including: borderpad, handlelength, handletextpad, borderaxespad, and columnspacing. These all follow the same form as labelspacing and area also in multiples of fontsize.

These values can also be set as the defaults for all figures using the matplotlibrc file.

what is the use of "response.setContentType("text/html")" in servlet

You have to tell the browser what you are sending back so that the browser can take appropriate action like launching a PDF viewer if its a PDF that is being received or launching a video player to play video file ,rendering the HTML if the content type is simple html response, save the bytes of the response as a downloaded file, etc.

some common MIME types are text/html,application/pdf,video/quicktime,application/java,image/jpeg,application/jar etc

In your case since you are sending HTML response to client you will have to set the content type as text/html

Adding multiple class using ng-class

Your example works for conditioned classes (the class name will show if the expressionDataX is true):

<div ng-class="{class1: expressionData1, class2: expressionData2}"></div>

You can also add multiple classes, supplied by the user of the element:

<div ng-class="[class1, class2]"></div>

Usage:

<div class="foo bar" class1="foo" class2="bar"></div>

How to recompile with -fPIC

Have a look at this page.

you can try globally adding the flag using: export CXXFLAGS="$CXXFLAGS -fPIC"

C# winforms combobox dynamic autocomplete

In previous replies are drawbacks. Offers its own version with the selection in the drop down list the desired item:

    private ConnectSqlForm()
    {
        InitializeComponent();
        cmbDatabases.TextChanged += UpdateAutoCompleteComboBox;
        cmbDatabases.KeyDown += AutoCompleteComboBoxKeyPress;
    }

    private void UpdateAutoCompleteComboBox(object sender, EventArgs e)
    {
        var comboBox = sender as ComboBox;
        if(comboBox == null)
        return;
        string txt = comboBox.Text;
        string foundItem = String.Empty;
        foreach(string item in comboBox.Items)
            if (!String.IsNullOrEmpty(txt) && item.ToLower().StartsWith(txt.ToLower()))
            {
                foundItem = item;
                break;
            }

        if (!String.IsNullOrEmpty(foundItem))
        {
            if (String.IsNullOrEmpty(txt) || !txt.Equals(foundItem))
            {
                comboBox.TextChanged -= UpdateAutoCompleteComboBox;
                comboBox.Text = foundItem;
                comboBox.DroppedDown = true;
                Cursor.Current = Cursors.Default;
                comboBox.TextChanged += UpdateAutoCompleteComboBox;
            }

            comboBox.SelectionStart = txt.Length;
            comboBox.SelectionLength = foundItem.Length - txt.Length;
        }
        else
            comboBox.DroppedDown = false;
    }

    private void AutoCompleteComboBoxKeyPress(object sender, KeyEventArgs e)
    {
        var comboBox = sender as ComboBox;
        if (comboBox != null && comboBox.DroppedDown)
        {
            switch (e.KeyCode)
            {
                case Keys.Back:
                    int sStart = comboBox.SelectionStart;
                    if (sStart > 0)
                    {
                        sStart--;
                        comboBox.Text = sStart == 0 ? "" : comboBox.Text.Substring(0, sStart);
                    }
                    e.SuppressKeyPress = true;
                    break;
            }

        }
    }

Clearing NSUserDefaults

It's a bug or whatever but the removePersistentDomainForName is not working while clearing all the NSUserDefaults values.

So, better option is that to reset the PersistentDomain and that you can do via following way:

NSUserDefaults.standardUserDefaults().setPersistentDomain(["":""], forName: NSBundle.mainBundle().bundleIdentifier!)

Changing the default icon in a Windows Forms application

You can change the app icon under project properties. Individual form icons under form properties.

sh: 0: getcwd() failed: No such file or directory on cited drive

This can happen with symlinks sometimes. If you experience this issue and you know you are in an existing directory, but your symlink may have changed, you can use this command:

cd $(pwd)

Select all elements with a "data-xxx" attribute without using jQuery

You can use querySelectorAll:

document.querySelectorAll('[data-foo]');

How to view the dependency tree of a given npm module?

There is also a nice web app to see the dependencies in a weighted map kind of view.

For example:

https://bundlephobia.com/[email protected]

How do MySQL indexes work?

Basically an index is a map of all your keys that is sorted in order. With a list in order, then instead of checking every key, it can do something like this:

1: Go to middle of list - is higher or lower than what I'm looking for?

2: If higher, go to halfway point between middle and bottom, if lower, middle and top

3: Is higher or lower? Jump to middle point again, etc.

Using that logic, you can find an element in a sorted list in about 7 steps, instead of checking every item.

Obviously there are complexities, but that gives you the basic idea.

How can I get the line number which threw exception?

Update to the answer

    // Get stack trace for the exception with source file information
    var st = new StackTrace(ex, true);
    // Get the top stack frame
    var frame = st.GetFrame(st.FrameCount-1);
    // Get the line number from the stack frame
    var line = frame.GetFileLineNumber();

How to establish ssh key pair when "Host key verification failed"

Step1:$Bhargava.ssh#

ssh-keygen -R 199.95.30.220

step2:$Bhargava.ssh #

ssh-copy-id [email protected]

          Enter the the password.........

step3: Bhargava .ssh #

ssh [email protected]

Welcome to Ubuntu 14.04.3 LTS (GNU/Linux 3.13.0-68-generic x86_64) * Documentation: https://help.ubuntu.com/ Ubuntu 14.04.3 LTS server : 228839 ip : 199.95.30.220 hostname : qt.example.com System information as of Thu Mar 24 02:13:43 EDT 2016 System load: 0.67 Processes: 321 Usage of /home: 5.1% of 497.80GB Users logged in: 0 Memory usage: 53% IP address for eth0: 199.95.30.220 Swap usage: 16% IP address for docker0: 172.17.0.1 Graph this data and manage this system at: https://landscape.canonical.com/ Last login: Wed Mar 23 02:07:29 2016 from 103.200.41.50

hostname@qt:~$

Adding a dictionary to another

You can loop through all the Animals using foreach and put it into NewAnimals.

How to avoid variable substitution in Oracle SQL Developer with 'trinidad & tobago'

In SQL*Plus putting SET DEFINE ? at the top of the script will normally solve this. Might work for Oracle SQL Developer as well.

Show/hide image with JavaScript

Here is a working example: http://jsfiddle.net/rVBzt/ (using jQuery)

<img id="tiger" src="https://twimg0-a.akamaihd.net/profile_images/2642324404/46d743534606515238a9a12cfb4b264a.jpeg">

<a id="toggle">click to toggle</a>

img {display: none;}

a {cursor: pointer; color: blue;}

$('#toggle').click(function() {
    $('#tiger').toggle();
});

var functionName = function() {} vs function functionName() {}

An important reason is to add one and only one variable as the "Root" of your namespace...

var MyNamespace = {}
MyNamespace.foo= function() {

}

var MyNamespace = {
  foo: function() {
  },
  ...
}

There are many techniques for namespacing. It's become more important with the plethora of JavaScript modules available.

Also see How do I declare a namespace in JavaScript?

find difference between two text files with one item per line

You can use the comm command to compare two sorted files

comm -13 <(sort file1) <(sort file2)

Javascript select onchange='this.form.submit()'

My psychic debugging skills tell me that your submit button is named submit.
Therefore, form.submit refers to the button rather than the method.

Rename the button to something else so that form.submit refers to the method again.

TLS 1.2 not working in cURL

I has similar problem in context of Stripe:

Error: Stripe no longer supports API requests made with TLS 1.0. Please initiate HTTPS connections with TLS 1.2 or later. You can learn more about this at https://stripe.com/blog/upgrading-tls.

Forcing TLS 1.2 using CURL parameter is temporary solution or even it can't be applied because of lack of room to place an update. By default TLS test function https://gist.github.com/olivierbellone/9f93efe9bd68de33e9b3a3afbd3835cf showed following configuration:

SSL version: NSS/3.21 Basic ECC
SSL version number: 0
OPENSSL_VERSION_NUMBER: 1000105f
TLS test (default): TLS 1.0
TLS test (TLS_v1): TLS 1.2
TLS test (TLS_v1_2): TLS 1.2

I updated libraries using following command:

yum update nss curl openssl

and then saw this:

SSL version: NSS/3.21 Basic ECC
SSL version number: 0
OPENSSL_VERSION_NUMBER: 1000105f
TLS test (default): TLS 1.2
TLS test (TLS_v1): TLS 1.2
TLS test (TLS_v1_2): TLS 1.2

Please notice that default TLS version changed to 1.2! That globally solved problem. This will help PayPal users too: https://www.paypal.com/au/webapps/mpp/tls-http-upgrade (update before end of June 2017)

How to add image for button in android?

   <Button
        android:id="@+id/button1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="News Feed"
        android:icon="@drawable/newsfeed" />

newsfeed is image in the drawable folder

Initialise numpy array of unknown length

a = np.empty(0)
for x in y:
    a = np.append(a, x)

In Typescript, what is the ! (exclamation mark / bang) operator when dereferencing a member?

Louis' answer is great, but I thought I would try to sum it up succinctly:

The bang operator tells the compiler to temporarily relax the "not null" constraint that it might otherwise demand. It says to the compiler: "As the developer, I know better than you that this variable cannot be null right now".

Getting the name of a variable as a string

The only objects in Python that have canonical names are modules, functions, and classes, and of course there is no guarantee that this canonical name has any meaning in any namespace after the function or class has been defined or the module imported. These names can also be modified after the objects are created so they may not always be particularly trustworthy.

What you want to do is not possible without recursively walking the tree of named objects; a name is a one-way reference to an object. A common or garden-variety Python object contains no references to its names. Imagine if every integer, every dict, every list, every Boolean needed to maintain a list of strings that represented names that referred to it! It would be an implementation nightmare, with little benefit to the programmer.

How to find common elements from multiple vectors?

There might be a cleverer way to go about this, but

intersect(intersect(a,b),c)

will do the job.

EDIT: More cleverly, and more conveniently if you have a lot of arguments:

Reduce(intersect, list(a,b,c))

Convert java.util.Date to String

    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    String date = "2010-05-30 22:15:52";
    java.util.Date formatedDate = sdf.parse(date); // returns a String when it is parsed
    System.out.println(sdf.format(formatedDate)); // the use of format function returns a String

password-check directive in angularjs

I have done it without directive.

<input type="password" ng-model="user.password" name="uPassword" required placeholder='Password' ng-minlength="3" ng-maxlength="15" title="3 to 15 characters" />
    <span class="error" ng-show="form.uPassword.$dirty && form.uPassword.$error.minlength">Too short</span>
    <span ng-show="form.uPassword.$dirty && form.uPassword.$error.required">Password required.</span><br />

    <input type="password" ng-model="user.confirmpassword" name="ucPassword" required placeholder='Confirm Password' ng-minlength="3" ng-maxlength="15" title="3 to 15 characters" />
    <span class="error" ng-show="form.ucPassword.$dirty && form.ucPassword.$error.minlength">Too short</span>
    <span ng-show="form.ucPassword.$dirty && form.ucPassword.$error.required">Retype password.</span>
    <div ng-show="(form.uPassword.$dirty && form.ucPassword.$dirty) && (user.password != user.confirmpassword)">
        <span>Password mismatched</span>
    </div>

how to assign a block of html code to a javascript variable

Greetings! I know this is an older post, but I found it through Google when searching for "javascript add large block of html as variable". I thought I'd post an alternate solution.

First, I'd recommend using single-quotes around the variable itself ... makes it easier to preserve double-quotes in the actual HTML code.

You can use a backslash to separate lines if you want to maintain a sense of formatting to the code:

var code = '<div class="my-class"> \
        <h1>The Header</h1> \
        <p>The paragraph of text</p> \
        <div class="my-quote"> \
            <p>The quote I\'d like to put in a div</p> \
        </div> \
    </div>';

Note: You'll obviously need to escape any single-quotes inside the code (e.g. inside the last 'p' tag)

Anyway, I hope that helps someone else that may be looking for the same answer I was ... Cheers!

HSL to RGB color conversion

C# Code from Mohsen's answer.

Here is the code from Mohsen's answer in C# if anyone else wants it. Note: Color is a custom class and Vector4 is from OpenTK. Both are easy to replace with something else of your choosing.

Hsl To Rgba

/// <summary>
/// Converts an HSL color value to RGB.
/// Input: Vector4 ( X: [0.0, 1.0], Y: [0.0, 1.0], Z: [0.0, 1.0], W: [0.0, 1.0] )
/// Output: Color ( R: [0, 255], G: [0, 255], B: [0, 255], A: [0, 255] )
/// </summary>
/// <param name="hsl">Vector4 defining X = h, Y = s, Z = l, W = a. Ranges [0, 1.0]</param>
/// <returns>RGBA Color. Ranges [0, 255]</returns>
public static Color HslToRgba(Vector4 hsl)
{
    float r, g, b;

    if (hsl.Y == 0.0f)
        r = g = b = hsl.Z;

    else
    {
        var q = hsl.Z < 0.5f ? hsl.Z * (1.0f + hsl.Y) : hsl.Z + hsl.Y - hsl.Z * hsl.Y;
        var p = 2.0f * hsl.Z - q;
        r = HueToRgb(p, q, hsl.X + 1.0f / 3.0f);
        g = HueToRgb(p, q, hsl.X);
        b = HueToRgb(p, q, hsl.X - 1.0f / 3.0f);
    }

    return new Color((int)(r * 255), (int)(g * 255), (int)(b * 255), (int)(hsl.W * 255));
}

// Helper for HslToRgba
private static float HueToRgb(float p, float q, float t)
{
    if (t < 0.0f) t += 1.0f;
    if (t > 1.0f) t -= 1.0f;
    if (t < 1.0f / 6.0f) return p + (q - p) * 6.0f * t;
    if (t < 1.0f / 2.0f) return q;
    if (t < 2.0f / 3.0f) return p + (q - p) * (2.0f / 3.0f - t) * 6.0f;
    return p;
}

Rgba To Hsl

/// <summary>
/// Converts an RGB color value to HSL.
/// Input: Color ( R: [0, 255], G: [0, 255], B: [0, 255], A: [0, 255] )
/// Output: Vector4 ( X: [0.0, 1.0], Y: [0.0, 1.0], Z: [0.0, 1.0], W: [0.0, 1.0] )
/// </summary>
/// <param name="rgba"></param>
/// <returns></returns>
public static Vector4 RgbaToHsl(Color rgba)
{
    float r = rgba.R / 255.0f;
    float g = rgba.G / 255.0f;
    float b = rgba.B / 255.0f;

    float max = (r > g && r > b) ? r : (g > b) ? g : b;
    float min = (r < g && r < b) ? r : (g < b) ? g : b;

    float h, s, l;
    h = s = l = (max + min) / 2.0f;

    if (max == min)
        h = s = 0.0f;

    else
    {
        float d = max - min;
        s = (l > 0.5f) ? d / (2.0f - max - min) : d / (max + min);

        if (r > g && r > b)
            h = (g - b) / d + (g < b ? 6.0f : 0.0f);

        else if (g > b)
            h = (b - r) / d + 2.0f;

        else
            h = (r - g) / d + 4.0f;

        h /= 6.0f;
    }

    return new Vector4(h, s, l, rgba.A / 255.0f);
}

How to add text to JFrame?

when I create my JLabel and enter the text to it, there is no wordwrap or anything

HTML formatting can be used to cause word wrap in any Swing component that offers styled text. E.G. as demonstrated in this answer.

Github Push Error: RPC failed; result=22, HTTP code = 413

For those who use IIS 7 to host a git http/https endpoint:

You need to increase your uploadReadAheadSize.

Launch Internet Information Services (IIS) Manager

Expand the Server field
Expand Sites
Select the site you want to make the modification for.
In the Features section, double click Configuration Editor
Under Section select: system.webServer > serverRuntime
Modify the uploadReadAheadSize section (The value must be between 0 and 2147483647.)
Click Apply
Restart the Website

Request redirect to /Account/Login?ReturnUrl=%2f since MVC 3 install on server

Be ware with this:

RegisterGlobalFilters(GlobalFilterCollection filters) {
  filters.Add(new System.Web.Mvc.AuthorizeAttribute());
}

How to read a list of files from a folder using PHP?

There is this function scandir():

$dir = 'dir';
$files = scandir($dir, 0);
for($i = 2; $i < count($files); $i++)
    print $files[$i]."<br>";

More here in the php.net manual

What is the difference between RTP or RTSP in a streaming server?

RTSP (actually RTP) can be used for streaming video, but also many other types of media including live presentations. Rtsp is just the protocol used to setup the RTP session.

For all the details you can check out my open source RTSP Server implementation on the following address: https://net7mma.codeplex.com/

Or my article @ http://www.codeproject.com/Articles/507218/Managed-Media-Aggregation-using-Rtsp-and-Rtp

It supports re-sourcing streams as well as the dynamic creation of streams, various RFC's are implemented and the library achieves better performance and less memory then FFMPEG and just about any other solutions in the transport layer and thus makes it a good candidate to use as a centralized point of access for most scenarios.

nginx: how to create an alias url route?

server {
  server_name example.com;
  root /path/to/root;
  location / {
    # bla bla
  }
  location /demo {
    alias /path/to/root/production/folder/here;
  }
}

If you need to use try_files inside /demo you'll need to replace alias with a root and do a rewrite because of the bug explained here

Mockito verify order / sequence of method calls

InOrder helps you to do that.

ServiceClassA firstMock = mock(ServiceClassA.class);
ServiceClassB secondMock = mock(ServiceClassB.class);

Mockito.doNothing().when(firstMock).methodOne();   
Mockito.doNothing().when(secondMock).methodTwo();  

//create inOrder object passing any mocks that need to be verified in order
InOrder inOrder = inOrder(firstMock, secondMock);

//following will make sure that firstMock was called before secondMock
inOrder.verify(firstMock).methodOne();
inOrder.verify(secondMock).methodTwo();

Angular2 equivalent of $document.ready()

You can fire an event yourself in ngOnInit() of your Angular root component and then listen for this event outside of Angular.

This is Dart code (I don't know TypeScript) but should't be to hard to translate

@Component(selector: 'app-element')
@View(
    templateUrl: 'app_element.html',
)
class AppElement implements OnInit {
  ElementRef elementRef;
  AppElement(this.elementRef);

  void ngOnInit() {
    DOM.dispatchEvent(elementRef.nativeElement, new CustomEvent('angular-ready'));
  }
}

How do I merge a specific commit from one branch into another in Git?

If BranchA has not been pushed to a remote then you can reorder the commits using rebase and then simply merge. It's preferable to use merge over rebase when possible because it doesn't create duplicate commits.

git checkout BranchA
git rebase -i HEAD~113
... reorder the commits so the 10 you want are first ...
git checkout BranchB
git merge [the 10th commit]

Playing MP4 files in Firefox using HTML5 video

I can confirm that mp4 just will not work in the video tag. No matter how much you try to mess with the type tag and the codec and the mime types from the server.

Crazy, because for the same exact video, on the same test page, the old embed tag for an mp4 works just fine in firefox. I spent all yesterday messing with this. Firefox is like IE all of a sudden, hours and hours of time, not billable. Yay.

Speaking of IE, it fails FAR MORE gracefully on this. When it can't match up the format it falls to the content between the tags, so it is possible to just put video around object around embed and everything works great. Firefox, nope, despite failing, it puts up the poster image (greyed out so that isn't even useful as a fallback) with an error message smack in the middle. So now the options are put in browser recognition code (meaning we've gained nothing on embedding videos in the last ten years) or ditch html5.

Make ABC Ordered List Items Have Bold Style

As an alternative and superior solution, you could use a custom counter in a before element. It involves no extra HTML markup. A CSS reset should be used alongside it, or at least styling removed from the ol element (list-style-type: none, reset margin), otherwise the element will have two counters.

<ol>
    <li>First line</li>
    <li>Second line</li>
</ol>

CSS:

ol {
    counter-reset: my-badass-counter;
}
ol li:before {
    content: counter(my-badass-counter, upper-alpha);
    counter-increment: my-badass-counter;
    margin-right: 5px;
    font-weight: bold;
}

An example: http://jsfiddle.net/xpAMU/1/

Regex for Comma delimited list

I had a slightly different requirement, to parse an encoded dictionary/hashtable with escaped commas, like this:

"1=This is something, 2=This is something,,with an escaped comma, 3=This is something else"

I think this is an elegant solution, with a trick that avoids a lot of regex complexity:

if (string.IsNullOrEmpty(encodedValues))
{
    return null;
}
else
{
    var retVal = new Dictionary<int, string>();
    var reFields = new Regex(@"([0-9]+)\=(([A-Za-z0-9\s]|(,,))+),");
    foreach (Match match in reFields.Matches(encodedValues + ","))
    {
        var id = match.Groups[1].Value;
        var value = match.Groups[2].Value;
        retVal[int.Parse(id)] = value.Replace(",,", ",");
    }
    return retVal;
}

I think it can be adapted to the original question with an expression like @"([0-9]+),\s?" and parse on Groups[0].

I hope it's helpful to somebody and thanks for the tips on getting it close to there, especially Asaph!

What's the right way to pass form element state to sibling/parent elements?

Five years later with introduction of React Hooks there is now much more elegant way of doing it with use useContext hook.

You define context in a global scope, export variables, objects and functions in the parent component and then wrap children in the App in a context provided and import whatever you need in child components. Below is a proof of concept.

import React, { useState, useContext } from "react";
import ReactDOM from "react-dom";
import styles from "./styles.css";

// Create context container in a global scope so it can be visible by every component
const ContextContainer = React.createContext(null);

const initialAppState = {
  selected: "Nothing"
};

function App() {
  // The app has a state variable and update handler
  const [appState, updateAppState] = useState(initialAppState);

  return (
    <div>
      <h1>Passing state between components</h1>

      {/* 
          This is a context provider. We wrap in it any children that might want to access
          App's variables.
          In 'value' you can pass as many objects, functions as you want. 
           We wanna share appState and its handler with child components,           
       */}
      <ContextContainer.Provider value={{ appState, updateAppState }}>
        {/* Here we load some child components */}
        <Book title="GoT" price="10" />
        <DebugNotice />
      </ContextContainer.Provider>
    </div>
  );
}

// Child component Book
function Book(props) {
  // Inside the child component you can import whatever the context provider allows.
  // Earlier we passed value={{ appState, updateAppState }}
  // In this child we need the appState and the update handler
  const { appState, updateAppState } = useContext(ContextContainer);

  function handleCommentChange(e) {
    //Here on button click we call updateAppState as we would normally do in the App
    // It adds/updates comment property with input value to the appState
    updateAppState({ ...appState, comment: e.target.value });
  }

  return (
    <div className="book">
      <h2>{props.title}</h2>
      <p>${props.price}</p>
      <input
        type="text"
        //Controlled Component. Value is reverse vound the value of the variable in state
        value={appState.comment}
        onChange={handleCommentChange}
      />
      <br />
      <button
        type="button"
        // Here on button click we call updateAppState as we would normally do in the app
        onClick={() => updateAppState({ ...appState, selected: props.title })}
      >
        Select This Book
      </button>
    </div>
  );
}

// Just another child component
function DebugNotice() {
  // Inside the child component you can import whatever the context provider allows.
  // Earlier we passed value={{ appState, updateAppState }}
  // but in this child we only need the appState to display its value
  const { appState } = useContext(ContextContainer);

  /* Here we pretty print the current state of the appState  */
  return (
    <div className="state">
      <h2>appState</h2>
      <pre>{JSON.stringify(appState, null, 2)}</pre>
    </div>
  );
}

const rootElement = document.body;
ReactDOM.render(<App />, rootElement);

You can run this example in the Code Sandbox editor.

How to automate browsing using python?

I have found the iMacros Firefox plugin (which is free) to work very well.

It can be automated with Python using Windows COM object interfaces. Here's some example code from http://wiki.imacros.net/Python. It requires Python Windows Extensions:

import win32com.client
def Hello():
    w=win32com.client.Dispatch("imacros")
    w.iimInit("", 1)
    w.iimPlay("Demo\\FillForm")
if __name__=='__main__':
    Hello()

Sort JavaScript object by key

ES6 - here is the 1 liner

_x000D_

var data = { zIndex:99,
             name:'sravan',
             age:25, 
             position:'architect',
             amount:'100k',
             manager:'mammu' };

console.log(Object.entries(data).sort().reduce( (o,[k,v]) => (o[k]=v,o), {} ));

_x000D_

How do I make a https post in Node Js without any third party module?

For example, like this:

const querystring = require('querystring');
const https = require('https');

var postData = querystring.stringify({
    'msg' : 'Hello World!'
});

var options = {
  hostname: 'posttestserver.com',
  port: 443,
  path: '/post.php',
  method: 'POST',
  headers: {
       'Content-Type': 'application/x-www-form-urlencoded',
       'Content-Length': postData.length
     }
};

var req = https.request(options, (res) => {
  console.log('statusCode:', res.statusCode);
  console.log('headers:', res.headers);

  res.on('data', (d) => {
    process.stdout.write(d);
  });
});

req.on('error', (e) => {
  console.error(e);
});

req.write(postData);
req.end();

Spring expected at least 1 bean which qualifies as autowire candidate for this dependency

You should put this line in your application context:

<context:component-scan base-package="com.cinebot.service" />

How to force Chrome browser to reload .css file while debugging in Visual Studio?

Still an issue.

Using parameters like "..css?something=random-value" changes nothing in my customer-support experience. Only name changes works.

Another take on the file renaming. I use URL Rewrite in IIS. Sometimes Helicon's Isapi Rewrite.

Add new rule.

+ Name: lame-chrome-fix.
+ Pattern: styles/(\w+)_(\d+)
+ Rewrite URL: /{R:1}.css

Note: I reserve the use of undercase to separate the name from the random number. Could be anything else.

Example:

<link href="/styles/template_<% 
Response.Write( System.DateTime.UtcNow.ToString("ddmmyyhhmmss")); %>" 
type="text/css" />

(No styles folder it's just a name part of the pattern)

Output code as:

<link href="/styles/template_285316115328" 
rel="stylesheet" type="text/css">

Redirect as:

(R:1 = template)

/template.css

Only the explanation is long.

Error in contrasts when defining a linear model in R

This is a variation to the answer provided by @Metrics and edited by @Max Ghenis...

l <- sapply(iris, function(x) is.factor(x))
m <- iris[,l]

n <- sapply( m, function(x) { y <- summary(x)/length(x)
len <- length(y[y<0.005 | y>0.995])
cbind(len,t(y))} )

drop_cols_df <- data.frame(var = names(l[l]), 
                           status = ifelse(as.vector(t(n[1,]))==0,"NODROP","DROP" ),
                           level1 = as.vector(t(n[2,])),
                           level2 = as.vector(t(n[3,])))

Here, after identifying factor variables, the second sapply computes what percent of records belong to each level / category of the variable. Then it identifies number of levels over 99.5% or below 0.5% incidence rate (my arbitrary thresholds).

It then goes on to return the number of valid levels and the incidence rate of each level in each categorical variable.

Variables with zero levels crossing the thresholds should not be dropped, while the other should be dropped from the linear model.

The last data frame makes viewing the results easy. It's hard coded for this data set since all factor variables are binomial. This data frame can be made generic easily enough.

Google Maps API - Get Coordinates of address

Althugh you asked for Google Maps API, I suggest an open source, working, legal, free and crowdsourced API by Open street maps

https://nominatim.openstreetmap.org/search?q=Mumbai&format=json

Here is the API documentation for reference.

Edit: It looks like there are discrepancies occasionally, at least in terms of postal codes, when compared to the Google Maps API, and the latter seems to be more accurate. This was the case when validating addresses in Canada with the Canada Post search service, however, it might be true for other countries too.

How to disable textbox from editing?

The TextBox has a property called ReadOnly. If you set that property to true then the TextBox will still be able to scroll but the user wont be able to change the value.

How to let an ASMX file output JSON

A quick gotcha that I learned the hard way (basically spending 4 hours on Google), you can use PageMethods in your ASPX file to return JSON (with the [ScriptMethod()] marker) for a static method, however if you decide to move your static methods to an asmx file, it cannot be a static method.

Also, you need to tell the web service Content-Type: application/json in order to get JSON back from the call (I'm using jQuery and the 3 Mistakes To Avoid When Using jQuery article was very enlightening - its from the same website mentioned in another answer here).

My eclipse won't open, i download the bundle pack it keeps saying error log

Make sure you have the prerequisite, a JVM (http://wiki.eclipse.org/Eclipse/Installation#Install_a_JVM) installed.

This will be a JRE and JDK package.

There are a number of sources which includes: http://www.oracle.com/technetwork/java/javase/downloads/index.html.

I can't delete a remote master branch on git

As explained in "Deleting your master branch" by Matthew Brett, you need to change your GitHub repo default branch.

You need to go to the GitHub page for your forked repository, and click on the “Settings” button.

Click on the "Branches" tab on the left hand side. There’s a “Default branch” dropdown list near the top of the screen.

From there, select placeholder (where placeholder is the dummy name for your new default branch).

Confirm that you want to change your default branch.

Now you can do (from the command line):

git push origin :master

Or, since 2012, you can delete that same branch directly on GitHub:

That was announced in Sept. 2013, a year after I initially wrote that answer.

For small changes like documentation fixes, typos, or if you’re just a walking software compiler, you can get a lot done in your browser without needing to clone the entire repository to your computer.

Note: for BitBucket, Tum reports in the comments:

About the same for Bitbucket
Repo -> Settings -> Repository details -> Main branch

simple HTTP server in Java using only Java SE API

Check out NanoHttpd

NanoHTTPD is a light-weight HTTP server designed for embedding in other applications, released under a Modified BSD licence.

It is being developed at Github and uses Apache Maven for builds & unit testing"

How can I create tests in Android Studio?

Android Studio v.2.3.3

Highlight the code context you want to test, and use the hotkey: CTRL+SHIFT+T

Use the dialog interface to complete your setup.

The testing framework is supposed to mirror your project package layout for best results, but you can manually create custom tests, provided you have the correct directory and build settings.

Relative imports - ModuleNotFoundError: No module named x

If you are using python 3+ then try adding below lines

import os, sys
dir_path = os.path.dirname(os.path.realpath(__file__))
parent_dir_path = os.path.abspath(os.path.join(dir_path, os.pardir))
sys.path.insert(0, parent_dir_path)

How to convert a private key to an RSA private key?

Newer versions of OpenSSL say BEGIN PRIVATE KEY because they contain the private key + an OID that identifies the key type (this is known as PKCS8 format). To get the old style key (known as either PKCS1 or traditional OpenSSL format) you can do this:

openssl rsa -in server.key -out server_new.key

Alternately, if you have a PKCS1 key and want PKCS8:

openssl pkcs8 -topk8 -nocrypt -in privkey.pem

Can't create a docker image for COPY failed: stat /var/lib/docker/tmp/docker-builder error

The following structure in docker-compose.yaml will allow you to have the Dockerfile in a subfolder from the root:

version: '3'
services:
  db:
    image: postgres:11
    environment:
      - PGDATA=/var/lib/postgresql/data/pgdata
    volumes:
      - postgres-data:/var/lib/postgresql/data
    ports:
      - 127.0.0.1:5432:5432
  **web:
    build: 
      context: ".."
      dockerfile: dockerfiles/Dockerfile**
    command: ...
...

Then, in your Dockerfile, which is in the same directory as docker-compose.yaml, you can do the following:

ENV APP_HOME /home

RUN mkdir -p ${APP_HOME}

# Copy the file to the directory in the container
COPY test.json ${APP_HOME}/test.json
COPY test.py ${APP_HOME}/test.py

# Browse to that directory created above
WORKDIR ${APP_HOME}

You can then run docker-compose from the parent directory like:

docker-compose -f .\dockerfiles\docker-compose.yaml build --no-cache

New warnings in iOS 9: "all bitcode will be dropped"

Disclaimer: This is intended for those supporting a continuous integration workflow that require an automated process. If you don't, please use Xcode as described in Javier's answer.

This worked for me to set ENABLE_BITCODE = NO via the command line:

find . -name *project.pbxproj | xargs sed -i -e 's/\(GCC_VERSION = "";\)/\1\ ENABLE_BITCODE = NO;/g'

Note that this is likely to be unstable across Xcode versions. It was tested with Xcode 7.0.1 and as part of a Cordova 4.0 project.

Use superscripts in R axis labels

@The Thunder Chimp You can split text in such a way that some sections are affected by super(or sub) script and others aren't through the use of *. For your example, with splitting the word "moment" from "4th" -

plot(rnorm(30), xlab = expression('4'^th*'moment'))

Check If array is null or not in php

Corrected;

/*
 return true if the array is not empty
 return false if it is empty
*/
function is_array_empty($arr){
  if(is_array($arr)){     
      foreach($arr as $key => $value){
          if(!empty($value) || $value != NULL || $value != ""){
              return true;
              break;//stop the process we have seen that at least 1 of the array has value so its not empty
          }
      }
      return false;
  }
}

How to import load a .sql or .csv file into SQLite?

Try doing it from the command like:

cat dump.sql | sqlite3 database.db

This will obviously only work with SQL statements in dump.sql. I'm not sure how to import a CSV.

How to add a new project to Github using VS Code

I think I ran into the similar problem. If you started a local git repository but have not set up a remote git project and want to push your local project to to git project.

1) create a remote git project and note the URL of project

2) open/edit your local git project

3) in the VS terminal type: git push --set-upstream [URL of project]

How to compare two dates in php

I know this is late, but for future reference, put the date format into a recognised format by using str_replace then your function will work. (replace the underscore with a dash)

//change the format to dashes instead of underscores, then get the timestamp
$date1 = strtotime(str_replace("_", "-",$date1));
$date2 = strtotime(str_replace("_", "-",$date2));

//compare the dates
if($date1 < $date2){
   //convert the date back to underscore format if needed when printing it out.
   echo '1 is small='.$date1.','.date('d_m_y',$date1);
}else{
   echo '2 is small='.$date2.','.date('d_m_y',$date2);
}

How to check if input date is equal to today's date?

The following solution compares the timestamp integer divided by the values of hours, minutes, seconds, millis.

var reducedToDay = function(date){return ~~(date.getTime()/(1000*60*60*24));};
return reducedToDay(date1) == reducedToDay(date2)

The tilde truncs the division result (see this article about integer division)

What is HTML5 ARIA?

What is ARIA?

ARIA emerged as a way to address the accessibility problem of using a markup language intended for documents, HTML, to build user interfaces (UI). HTML includes a great many features to deal with documents (P, h3,UL,TABLE) but only basic UI elements such as A, INPUT and BUTTON. Windows and other operating systems support APIs that allow (Assistive Technology) AT to access the functionality of UI controls. Internet Explorer and other browsers map the native HTML elements to the accessibility API, but the html controls are not as rich as the controls common on desktop operating systems, and are not enough for modern web applications Custom controls can extend html elements to provide the rich UI needed for modern web applications. Before ARIA, the browser had no way to expose this extra richness to the accessibility API or AT. The classic example of this issue is adding a click handler to an image. It creates what appears to be a clickable button to a mouse user, but is still just an image to a keyboard or AT user.

The solution was to create a set of attributes that allow developers to extend HTML with UI semantics. The ARIA term for a group of HTML elements that have custom functionality and use ARIA attributes to map these functions to accessibility APIs is a “Widget. ARIA also provides a means for authors to document the role of content itself, which in turn, allows AT to construct alternate navigation mechanisms for the content that are much easier to use than reading the full text or only iterating over a list of the links.

It is important to remember that in simple cases, it is much preferred to use native HTML controls and style them rather than using ARIA. That is don’t reinvent wheels, or checkboxes, if you don’t have to.

Fortunately, ARIA markup can be added to existing sites without changing the behavior for mainstream users. This greatly reduces the cost of modifying and testing the website or application.

Importing a csv into mysql via command line

I know this says command line, but just a tidbit of something quick to try that might work, if you've got MySQL workbench and the csv isn't too large, you can simply

SELECT * FROM table
Copy entire CSV
Paste csv into the query results section of Workbench
Hope for the best

I say hope for the best because this is MySQL Workbench. You never know when it's going to explode

If you want to do this on a remote server, you would do

mysql -h<server|ip> -u<username> -p --local-infile bark -e "LOAD DATA LOCAL INFILE '<filename.csv>'  INTO TABLE <table>  FIELDS TERMINATED BY ',' LINES TERMINATED BY '\n'"

Note, I didn't put a password after -p as putting one on the command line is considered bad practice

Android SQLite SELECT Query

Try trimming the string to make sure there is no extra white space:

Cursor c = db.rawQuery("SELECT * FROM tbl1 WHERE TRIM(name) = '"+name.trim()+"'", null);

Also use c.moveToFirst() like @thinksteep mentioned.

This is a complete code for select statements.

SQLiteDatabase db = this.getReadableDatabase();
Cursor c = db.rawQuery("SELECT column1,column2,column3 FROM table ", null);
if (c.moveToFirst()){
    do {
        // Passing values 
        String column1 = c.getString(0);
        String column2 = c.getString(1);
        String column3 = c.getString(2); 
        // Do something Here with values
    } while(c.moveToNext());
}
c.close();
db.close();

How to read a file and write into a text file?

FileCopy "1.mis", "1.txt"

AngularJS sorting by property

Here is what i did and it works.
I just used a stringified object.

$scope.thread = [ 
  {
    mostRecent:{text:'hello world',timeStamp:12345678 } 
    allMessages:[]
  }
  {MoreThreads...}
  {etc....}
]

<div ng-repeat="message in thread | orderBy : '-mostRecent.timeStamp'" >

if i wanted to sort by text i would do

orderBy : 'mostRecent.text'

Calculating distance between two points (Latitude, Longitude)

As you're using SQL 2008 or later, I'd recommend checking out the GEOGRAPHY data type. SQL has built in support for geospatial queries.

e.g. you'd have a column in your table of type GEOGRAPHY which would be populated with a geospatial representation of the coordinates (check out the MSDN reference linked above for examples). This datatype then exposes methods allowing you to perform a whole host of geospatial queries (e.g. finding the distance between 2 points)

Reactive forms - disabled attribute

In my case with Angular 8. I wanted to toggle enable/disable of the input depending on the condition.

[attr.disabled] didn't work for me so here is my solution.

I removed [attr.disabled] from HTML and in the component function performed this check:

if (condition) {
    this.form.controls.myField.disable();
} else {
    this.form.controls.myField.enable();
}

Could not load dynamic library 'cudart64_101.dll' on tensorflow CPU-only installation

To install the prerequisites for GPU support in TensorFlow 2.1:

Install your latest GPU drivers.
Install CUDA 10.1.
- If the CUDA installer reports "you are installing an older driver version", you may wish to choose a custom installation and deselect some components. Indeed, note that software bundled with CUDA including GeForce Experience, PhysX, a Display Driver, and Visual Studio integration are not required by TensorFlow.
- Also note that TensorFlow requires a specific version of the CUDA Toolkit unless you build from source; for TensorFlow 2.1 and 2.2, this is currently version 10.1.
Install cuDNN.
1. Download cuDNN v7.6.4 for CUDA 10.1. This will require you to sign up to the NVIDIA Developer Program.
2. Unzip to a suitable location and add the bin directory to your PATH.
Install tensorflow by pip install tensorflow.
You may need to restart your PC.

REST API - Use the "Accept: application/json" HTTP Header

Well Curl could be a better option for json representation but in that case it would be difficult to understand the structure of json because its in command line. if you want to get your json on browser you simply remove all the XML Annotations like -

@XmlRootElement(name="person")
@XmlAccessorType(XmlAccessType.NONE)
@XmlAttribute
@XmlElement

from your model class and than run the same url, you have used for xml representation.

Make sure that you have jacson-databind dependency in your pom.xml

<dependency>
  <groupId>com.fasterxml.jackson.core</groupId>
  <artifactId>jackson-databind</artifactId>
  <version>2.4.1</version>
</dependency>

PHPMailer AddAddress()

You need to call the AddAddress function once for each E-Mail address you want to send to. There are only two arguments for this function: recipient_email_address and recipient_name. The recipient name is optional and will not be used if not present.

$mailer->AddAddress('[email protected]', 'First Name');
$mailer->AddAddress('[email protected]', 'Second Name');
$mailer->AddAddress('[email protected]', 'Third Name');

You could use an array to store the recipients and then use a for loop. I hope it helps.

Get list of all tables in Oracle?

select * from dba_tables

gives all the tables of all the users only if the user with which you logged in is having the sysdba privileges.

How do I edit SSIS package files?

Adding to what b_levitt said, you can get the SSDT-BI plugin for Visual Studio 2013 here: http://www.microsoft.com/en-us/download/details.aspx?id=42313

Starting a shell in the Docker Alpine container

Nowadays, Alpine images will boot directly into /bin/sh by default, without having to specify a shell to execute:

$ sudo docker run -it --rm alpine  
/ # echo $0  
/bin/sh

This is since the alpine image Dockerfiles now contain a CMD command, that specifies the shell to execute when the container starts: CMD ["/bin/sh"].

In older Alpine image versions (pre-2017), the CMD command was not used, since Docker used to create an additional layer for CMD which caused the image size to increase. This is something that the Alpine image developers wanted to avoid. In recent Docker versions (1.10+), CMD no longer occupies a layer, and so it was added to alpine images. Therefore, as long as CMD is not overridden, recent Alpine images will boot into /bin/sh.

For reference, see the following commit to the official Alpine Dockerfiles by Glider Labs:
https://github.com/gliderlabs/docker-alpine/commit/ddc19dd95ceb3584ced58be0b8d7e9169d04c7a3#diff-db3dfdee92c17cf53a96578d4900cb5b

What is the difference between MySQL, MySQLi and PDO?

Those are different APIs to access a MySQL backend

The mysql is the historical API
The mysqli is a new version of the historical API. It should perform better and have a better set of function. Also, the API is object-oriented.
PDO_MySQL, is the MySQL for PDO. PDO has been introduced in PHP, and the project aims to make a common API for all the databases access, so in theory you should be able to migrate between RDMS without changing any code (if you don't use specific RDBM function in your queries), also object-oriented.

So it depends on what kind of code you want to produce. If you prefer object-oriented layers or plain functions...

My advice would be

PDO
MySQLi
mysql

Also my feeling, the mysql API would probably being deleted in future releases of PHP.

typescript - cloning object

For a simple clone of the hole object's content, I simply stringify and parse the instance :

let cloneObject = JSON.parse(JSON.stringify(objectToClone))

Whereas I change data in objectToClone tree, there is no change in cloneObject. That was my requierement.

Hope it help

Chrome hangs after certain amount of data transfered - waiting for available socket

Chrome is a Chromium-based browser and Chromium-based browsers only allow maximum 6 open socket connections at a time, when the 7th connection starts up it will just sit idle and wait for one of the 6 which are running to stop and then it will start running. Hence the error code ‘waiting for available sockets’, the 7th one will wait for one of those 6 sockets to become available and then it will start running.

You can either

1. Clear browser cache & cookies (https://geekdroids.com/waiting-for-available-socket/#1_Clear_browser_cache_cookies)
1. Flush socket pools (https://geekdroids.com/waiting-for-available-socket/#2_Flush_socket_pools)
1. Flush DNS (https://geekdroids.com/waiting-for-available-socket/#3_Flush_DNS)

What is a plain English explanation of "Big O" notation?

Algorithm example (Java):

public boolean search(/* for */Integer K,/* in */List</* of */Integer> L)
{
    for(/* each */Integer i:/* in */L)
    {
        if(i == K)
        {
            return true;
        }
    }
    
    return false;
}

Algorithm description:

This algorithm searches a list, item by item, looking for a key,
Iterating on each item in the list, if it's the key then return True,
If the loop has finished without finding the key, return False.

Big-O notation represents the upper-bound on the Complexity (Time, Space, ..)

To find The Big-O on Time Complexity:

Calculate how much time (regarding input size) the worst case takes:
Worst-Case: the key doesn't exist in the list.
Time(Worst-Case) = 4n+1
Time: O(4n+1) = O(n) | in Big-O, constants are neglected
O(n) ~ Linear

There's also Big-Omega, which represent the complexity of the Best-Case:

Best-Case: the key is the first item.
Time(Best-Case) = 4
Time: O(4) = O(1) ~ Instant\Constant

Is there a way to take the first 1000 rows of a Spark Dataframe?

The method you are looking for is .limit.

Returns a new Dataset by taking the first n rows. The difference between this function and head is that head returns an array while limit returns a new Dataset.

Example usage:

df.limit(1000)

How to delete large data of table in SQL without log?

If you are Deleting All the rows in that table the simplest option is to Truncate table, something like
```
TRUNCATE TABLE LargeTable
GO
```
Truncate table will simply empty the table, you cannot use WHERE clause to limit the rows being deleted and no triggers will be fired.
On the other hand if you are deleting more than 80-90 Percent of the data, say if you have total of 11 Million rows and you want to delete 10 million another way would be to Insert these 1 million rows (records you want to keep) to another staging table. Truncate this Large table and Insert back these 1 Million rows.
Or if permissions/views or other objects which has this large table as their underlying table doesnt get affected by dropping this table you can get these relatively small amount of the rows into another table drop this table and create another table with same schema and import these rows back into this ex-Large table.

One last option I can think of is to change your database's Recovery Mode to SIMPLE and then delete rows in smaller batches using a while loop something like this..

DECLARE @Deleted_Rows INT;
SET @Deleted_Rows = 1;


WHILE (@Deleted_Rows > 0)
  BEGIN
   -- Delete some small number of rows at a time
     DELETE TOP (10000)  LargeTable 
     WHERE readTime < dateadd(MONTH,-7,GETDATE())

  SET @Deleted_Rows = @@ROWCOUNT;
END

and dont forget to change the Recovery mode back to full and I think you have to take a backup to make it fully affective (the change or recovery modes).

How to use patterns in a case statement?

I don't think you can use braces.

According to the Bash manual about case in Conditional Constructs.

Each pattern undergoes tilde expansion, parameter expansion, command substitution, and arithmetic expansion.

Nothing about Brace Expansion unfortunately.

So you'd have to do something like this:

case $1 in
    req*)
        ...
        ;;
    met*|meet*)
        ...
        ;;
    *)
        # You should have a default one too.
esac

How to generate a git patch for a specific commit?

git format-patch commit_Id~1..commit_Id  
git apply patch-file-name

Fast and simple solution.

How to redirect on another page and pass parameter in url from table?

Do this :

<script type="text/javascript">
function showDetails(username)
{
   window.location = '/player_detail?username='+username;
}
</script>

<input type="button" name="theButton" value="Detail" onclick="showDetails('username');">

Selenium WebDriver findElement(By.xpath()) not working for me

your syntax is completely wrong....you need to give findelement to the driver

i.e your code will be :

WebDriver driver = new FirefoxDriver();
WebeElement element ;

element = driver.findElement(By.xpath("//[@test-id='test-username']");

// your xpath is: "//[@test-id='test-username']"

i suggest try this :"//*[@test-id='test-username']"

How to convert DateTime to VarChar

You did not say which database, but with mysql here is an easy way to get a date from a timestamp (and the varchar type conversion should happen automatically):

mysql> select date(now());
+-------------+
| date(now()) |
+-------------+
| 2008-09-16  | 
+-------------+
1 row in set (0.00 sec)

Write a file in external storage in Android

The code below creates a Documents directory and then a sub-directory for the application and saved the files to it.

public class loadDataTooDisk extends AsyncTask<String, Integer, String> {
    String sdCardFileTxt;
    @Override
    protected String doInBackground(String... params)
    {

        //check to see if external storage is avalibel
        checkState();
        if(canW == canR == true)
        {
            //get the path to sdcard 
            File pathToExternalStorage = Environment.getExternalStorageDirectory();
            //to this path add a new directory path and create new App dir (InstroList) in /documents Dir
            File appDirectory = new File(pathToExternalStorage.getAbsolutePath()  + "/documents/InstroList");
            // have the object build the directory structure, if needed.
            appDirectory.mkdirs();
            //test to see if it is a Text file
            if ( myNewFileName.endsWith(".txt") )
            {

                //Create a File for the output file data
                File saveFilePath = new File (appDirectory, myNewFileName);
                //Adds the textbox data to the file
                try{
                    String newline = "\r\n";
                    FileOutputStream fos = new FileOutputStream (saveFilePath);
                    OutputStreamWriter OutDataWriter  = new OutputStreamWriter(fos);

                    OutDataWriter.write(equipNo.getText() + newline);
                    // OutDataWriter.append(equipNo.getText() + newline);
                    OutDataWriter.append(equip_Type.getText() + newline);
                    OutDataWriter.append(equip_Make.getText()+ newline);
                    OutDataWriter.append(equipModel_No.getText()+ newline);
                    OutDataWriter.append(equip_Password.getText()+ newline);
                    OutDataWriter.append(equipWeb_Site.getText()+ newline);
                    //OutDataWriter.append(equipNotes.getText());
                    OutDataWriter.close();

                    fos.flush();
                    fos.close();

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

This one builds the file name

   private String BuildNewFileName()
    { // creates a new filr name
        Time today = new Time(Time.getCurrentTimezone());
        today.setToNow();

        StringBuilder sb = new StringBuilder();

        sb.append(today.year + "");                // Year)
        sb.append("_");
        sb.append(today.monthDay + "");          // Day of the month (1-31)
        sb.append("_");
        sb.append(today.month + "");              // Month (0-11))
        sb.append("_");
        sb.append(today.format("%k:%M:%S"));      // Current time
        sb.append(".txt");                      //Completed file name

        myNewFileName = sb.toString();
        //Replace (:) with (_)
        myNewFileName = myNewFileName.replaceAll(":", "_");

        return myNewFileName;
    }

Hope this helps! It took me a long time to get it working.

how to align text vertically center in android

The problem is the padding of the font on the textview. Just add to your textview:

android:includeFontPadding="false"

How to record phone calls in android?

I would like to comment on this, even tough Its old post. So, basically, I want to combine 2 answers, one from this post and one from another post that I read, don't know the author of it so please sorry for using your methods.

So, here are my classes for achieveving desired result:

    public class StartActivity extends Activity {
    public static final int REQUEST_CODE = 5912;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        PackageManager p = getPackageManager();
        ComponentName componentName = new ComponentName(this, StartActivity.class); // activity which is first time open in manifiest file which is declare as <category android:name="android.intent.category.LAUNCHER" />
        p.setComponentEnabledSetting(componentName, PackageManager.COMPONENT_ENABLED_STATE_DISABLED, PackageManager.DONT_KILL_APP);
        startService(new Intent(this, StartService.class));
        startService(new Intent(this, SmsOutgoingService.class));
        try {
            // Initiate DevicePolicyManager.
            DevicePolicyManager mDPM = (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE);
            ComponentName mAdminName = new ComponentName(this, DeviceAdminReciever.class);

            if (!mDPM.isAdminActive(mAdminName)) {
                Intent intent = new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);
                intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, mAdminName);
                intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION, "Click on Activate button to secure your application.");
                startActivityForResult(intent, REQUEST_CODE);
            } else {
                mDPM.lockNow();
                finish();
//                 Intent intent = new Intent(MainActivity.this,
//                 TrackDeviceService.class);
//                 startService(intent);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (REQUEST_CODE == requestCode) {
            startService(new Intent(StartActivity.this, TService.class));
            finish();
        }
        super.onActivityResult(requestCode, resultCode, data);
    }
}

And my TService class:

  public class TService extends Service {

    private MediaRecorder recorder;
    private File audiofile;
    private boolean recordstarted = false;

    private static final String ACTION_IN = "android.intent.action.PHONE_STATE";
    private static final String ACTION_OUT = "android.intent.action.NEW_OUTGOING_CALL";


    @Override
    public IBinder onBind(Intent arg0) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public void onDestroy() {
        Log.d("service", "destroy");

        super.onDestroy();
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Log.d("StartService", "TService");
        final IntentFilter filter = new IntentFilter();
        filter.addAction(ACTION_OUT);
        filter.addAction(ACTION_IN);
        this.registerReceiver(new CallReceiver(), filter);
        return super.onStartCommand(intent, flags, startId);
    }

    private void startRecording() {
        File sampleDir = new File(Environment.getExternalStorageDirectory(), "/TestRecordingDasa1");
        if (!sampleDir.exists()) {
            sampleDir.mkdirs();
        }
        String file_name = "Record";
        try {
            audiofile = File.createTempFile(file_name, ".amr", sampleDir);
        } catch (IOException e) {
            e.printStackTrace();
        }
        String path = Environment.getExternalStorageDirectory().getAbsolutePath();

        recorder = new MediaRecorder();
//                          recorder.setAudioSource(MediaRecorder.AudioSource.VOICE_CALL);

        recorder.setAudioSource(MediaRecorder.AudioSource.VOICE_COMMUNICATION);
        recorder.setOutputFormat(MediaRecorder.OutputFormat.AMR_NB);
        recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
        recorder.setOutputFile(audiofile.getAbsolutePath());
        try {
            recorder.prepare();
        } catch (IllegalStateException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        recorder.start();
        recordstarted = true;
    }

    private void stopRecording() {
        if (recordstarted) {
            recorder.stop();
            recordstarted = false;
        }
    }


    public abstract class PhonecallReceiver extends BroadcastReceiver {

        //The receiver will be recreated whenever android feels like it.  We need a static variable to remember data between instantiations

        private int lastState = TelephonyManager.CALL_STATE_IDLE;
        private Date callStartTime;
        private boolean isIncoming;
        private String savedNumber;  //because the passed incoming is only valid in ringing


        @Override
        public void onReceive(Context context, Intent intent) {
//        startRecording();
            //We listen to two intents.  The new outgoing call only tells us of an outgoing call.  We use it to get the number.
            if (intent.getAction().equals("android.intent.action.NEW_OUTGOING_CALL")) {
                savedNumber = intent.getExtras().getString("android.intent.extra.PHONE_NUMBER");
            } else {
                String stateStr = intent.getExtras().getString(TelephonyManager.EXTRA_STATE);
                String number = intent.getExtras().getString(TelephonyManager.EXTRA_INCOMING_NUMBER);
                int state = 0;
                if (stateStr.equals(TelephonyManager.EXTRA_STATE_IDLE)) {
                    state = TelephonyManager.CALL_STATE_IDLE;
                } else if (stateStr.equals(TelephonyManager.EXTRA_STATE_OFFHOOK)) {
                    state = TelephonyManager.CALL_STATE_OFFHOOK;
                } else if (stateStr.equals(TelephonyManager.EXTRA_STATE_RINGING)) {
                    state = TelephonyManager.CALL_STATE_RINGING;
                }


                onCallStateChanged(context, state, number);
            }
        }

        //Derived classes should override these to respond to specific events of interest
        protected abstract void onIncomingCallReceived(Context ctx, String number, Date start);

        protected abstract void onIncomingCallAnswered(Context ctx, String number, Date start);

        protected abstract void onIncomingCallEnded(Context ctx, String number, Date start, Date end);

        protected abstract void onOutgoingCallStarted(Context ctx, String number, Date start);

        protected abstract void onOutgoingCallEnded(Context ctx, String number, Date start, Date end);

        protected abstract void onMissedCall(Context ctx, String number, Date start);

        //Deals with actual events

        //Incoming call-  goes from IDLE to RINGING when it rings, to OFFHOOK when it's answered, to IDLE when its hung up
        //Outgoing call-  goes from IDLE to OFFHOOK when it dials out, to IDLE when hung up
        public void onCallStateChanged(Context context, int state, String number) {
            if (lastState == state) {
                //No change, debounce extras
                return;
            }
            switch (state) {
                case TelephonyManager.CALL_STATE_RINGING:
                    isIncoming = true;
                    callStartTime = new Date();
                    savedNumber = number;
                    onIncomingCallReceived(context, number, callStartTime);
                    break;
                case TelephonyManager.CALL_STATE_OFFHOOK:
                    //Transition of ringing->offhook are pickups of incoming calls.  Nothing done on them
                    if (lastState != TelephonyManager.CALL_STATE_RINGING) {
                        isIncoming = false;
                        callStartTime = new Date();
                        startRecording();
                        onOutgoingCallStarted(context, savedNumber, callStartTime);
                    } else {
                        isIncoming = true;
                        callStartTime = new Date();
                        startRecording();
                        onIncomingCallAnswered(context, savedNumber, callStartTime);
                    }

                    break;
                case TelephonyManager.CALL_STATE_IDLE:
                    //Went to idle-  this is the end of a call.  What type depends on previous state(s)
                    if (lastState == TelephonyManager.CALL_STATE_RINGING) {
                        //Ring but no pickup-  a miss
                        onMissedCall(context, savedNumber, callStartTime);
                    } else if (isIncoming) {
                        stopRecording();
                        onIncomingCallEnded(context, savedNumber, callStartTime, new Date());
                    } else {
                        stopRecording();
                        onOutgoingCallEnded(context, savedNumber, callStartTime, new Date());
                    }
                    break;
            }
            lastState = state;
        }

    }

    public class CallReceiver extends PhonecallReceiver {

        @Override
        protected void onIncomingCallReceived(Context ctx, String number, Date start) {
            Log.d("onIncomingCallReceived", number + " " + start.toString());
        }

        @Override
        protected void onIncomingCallAnswered(Context ctx, String number, Date start) {
            Log.d("onIncomingCallAnswered", number + " " + start.toString());
        }

        @Override
        protected void onIncomingCallEnded(Context ctx, String number, Date start, Date end) {
            Log.d("onIncomingCallEnded", number + " " + start.toString() + "\t" + end.toString());
        }

        @Override
        protected void onOutgoingCallStarted(Context ctx, String number, Date start) {
            Log.d("onOutgoingCallStarted", number + " " + start.toString());
        }

        @Override
        protected void onOutgoingCallEnded(Context ctx, String number, Date start, Date end) {
            Log.d("onOutgoingCallEnded", number + " " + start.toString() + "\t" + end.toString());
        }

        @Override
        protected void onMissedCall(Context ctx, String number, Date start) {
            Log.d("onMissedCall", number + " " + start.toString());
//        PostCallHandler postCallHandler = new PostCallHandler(number, "janskd" , "")
        }

    }

}

inside TService class you will find CallReceiever class that is going to handle everything you need from the call. You can add parameters as per your will, but, the main point is important.

From your MainActvitiy call Service that will start your Receiever. If you want to record media from receiever directly, you will get errors, so, you need to register Receiever from service. After that, you can call start recording and end recording wherever you like. Calling return super.onStartCommand(intent, flags, startId); will have that Service lasting for more than one call, so keep that in mind.

Finally, AndroidManifest.xml file:

<manifest
    package="your.package.name"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:installLocation="internalOnly">

    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
    <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>
    <uses-permission android:name="android.permission.READ_PHONE_STATE"/>
    <uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS"/>
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
    <uses-permission android:name="android.permission.WAKE_LOCK"/>
    <uses-permission android:name="android.permission.MODIFY_PHONE_STATE"/>
    <uses-permission android:name="android.permission.RECEIVE_SMS"/>
    <uses-permission android:name="android.permission.READ_SMS"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <uses-permission android:name="android.permission.STORAGE" />

    <application
        android:name=".AppController"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <activity android:name=".ui.StartActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>

                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>

        <receiver
            android:name=".io.boot.DeviceAdminReciever"
            android:permission="android.permission.BIND_DEVICE_ADMIN" >
            <meta-data
                android:name="android.app.device_admin"
                android:resource="@xml/my_admin" />
            <intent-filter>
                <action android:name="android.app.action.DEVICE_ADMIN_ENABLED" />
                <action android:name="android.app.action.DEVICE_ADMIN_DISABLED" />
                <action android:name="android.app.action.DEVICE_ADMIN_DISABLE_REQUESTED" />
            </intent-filter>
        </receiver>

        <service android:name=".io.calls.TService" >
        </service>
    </application>

</manifest>

So, this is it, its working perfectly with my Samsung Galaxy s6 Edge+, Ive tested it on Galaxy Note 4 and on Samsung J5, a big thank you to the authors of this post and the post about receieving phone calls.

How to set dropdown arrow in spinner?

                   <Spinner
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:layout_marginRight="16dp"
                    android:paddingLeft="10dp"
                    android:spinnerMode="dropdown" />

Convert pandas.Series from dtype object to float, and errors to nans

In [30]: pd.Series([1,2,3,4,'.']).convert_objects(convert_numeric=True)
Out[30]: 
0     1
1     2
2     3
3     4
4   NaN
dtype: float64

SQL Server Insert if not exists

Try below code

ALTER PROCEDURE [dbo].[EmailsRecebidosInsert]
  (@_DE nvarchar(50),
   @_ASSUNTO nvarchar(50),
   @_DATA nvarchar(30) )
AS
BEGIN
   INSERT INTO EmailsRecebidos (De, Assunto, Data)
   select @_DE, @_ASSUNTO, @_DATA
   EXCEPT
   SELECT De, Assunto, Data from EmailsRecebidos
END

How to move screen without moving cursor in Vim?

I wrote a plugin which enables me to navigate the file without moving the cursor position. It's based on folding the lines between your position and your target position and then jumping over the fold, or abort it and don't move at all.

It's also easy to fast-switch between the cursor on the first line, the last line and cursor in the middle by just clicking j, k or l when you are in the mode of the plugin.

I guess it would be a good fit here.

Android - Using Custom Font

You can use PixlUI at https://github.com/neopixl/PixlUI

import their .jar and use it in XML

 <com.neopixl.pixlui.components.textview.TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/hello_world"
    pixlui:typeface="GearedSlab.ttf" />

ng-repeat finish event

It may also be necessary when you check the scope.$last variable to wrap your trigger with a setTimeout(someFn, 0). A setTimeout 0 is an accepted technique in javascript and it was imperative for my directive to run correctly.

Simplest code for array intersection in javascript

This is probably the simplest one, besides list1.filter(n => list2.includes(n))

_x000D_

var list1 = ['bread', 'ice cream', 'cereals', 'strawberry', 'chocolate']_x000D_
var list2 = ['bread', 'cherry', 'ice cream', 'oats']_x000D_
_x000D_
function check_common(list1, list2){_x000D_
 _x000D_
 list3 = []_x000D_
 for (let i=0; i<list1.length; i++){_x000D_
  _x000D_
  for (let j=0; j<list2.length; j++){ _x000D_
   if (list1[i] === list2[j]){_x000D_
    list3.push(list1[i]);    _x000D_
   }  _x000D_
  }_x000D_
  _x000D_
 }_x000D_
 return list3_x000D_
 _x000D_
}_x000D_
_x000D_
check_common(list1, list2) // ["bread", "ice cream"]

_x000D_

How do I install Keras and Theano in Anaconda Python on Windows?

In windows environment with Anconda. Go to anconda prompt from start. Then if you are behind proxy then .copndarc file needs to eb updated with the proxy details.

ssl_verify: false channels: - defaults proxy_servers: http: http://xx.xx.xx.xx:xxxx https: https://xx.xx.xx.xx:xxxx

I had ssl_verify initially marked as 'True' then I was getting ssl error. So i turned it to false as above and then ran the below commands

conda update conda conda update --all conda install --channel https://conda.anaconda.org/conda-forge keras conda install --channel https://conda.anaconda.org/conda-forge tensorflow

My python version is 3.6.7

How to kill a running SELECT statement

There is no need to kill entire session. In Oracle 18c you could use ALTER SYSTEM CANCEL:

Cancelling a SQL Statement in a Session

You can cancel a SQL statement in a session using the ALTER SYSTEM CANCEL SQL statement.

Instead of terminating a session, you can cancel a high-load SQL statement in a session. When you cancel a DML statement, the statement is rolled back.
ALTER SYSTEM CANCEL SQL 'SID, SERIAL[, @INST_ID][, SQL_ID]';
If @INST_ID is not specified, the instance ID of the current session is used.

If SQL_ID is not specified, the currently running SQL statement in the specified session is terminated.

Get value of multiselect box using jQuery or pure JS

You could do like this too.

<form action="ResultsDulith.php" id="intermediate" name="inputMachine[]" multiple="multiple" method="post">
    <select id="selectDuration" name="selectDuration[]" multiple="multiple"> 
        <option value="1 WEEK" >Last 1 Week</option>
        <option value="2 WEEK" >Last 2 Week </option>
        <option value="3 WEEK" >Last 3 Week</option>
         <option value="4 WEEK" >Last 4 Week</option>
          <option value="5 WEEK" >Last 5 Week</option>
           <option value="6 WEEK" >Last 6 Week</option>
    </select>
     <input type="submit"/> 
</form>

Then take the multiple selection from following PHP code below. It print the selected multiple values accordingly.

$shift=$_POST['selectDuration'];

print_r($shift);

How to parse JSON array in jQuery?

jQuery.parseJSON - new in jQuery 1.4.1

Node.js: How to send headers with form data using request module?

I found the solution of this problem and i should work i'm sure about this because i also face the same problem

here is my solution----->

var request = require('request');

//set url
var url = 'http://localhost:8088/example';

//set header
var headers = {
    'Authorization': 'Your authorization'
};

//set form data
var form = {first_name: first_name, last_name: last_name};

//set request parameter
request.post({headers: headers, url: url, form: form, method: 'POST'}, function (e, r, body) {

    var bodyValues = JSON.parse(body);
    res.send(bodyValues);
});

Composer Warning: openssl extension is missing. How to enable in WAMP

you need to edit the "c:\Program Files\wamp\bin\php\php5.3.13\php.ini" file search for: ;extension=php_openssl.dll

remove the semicolon at the beginning

note: if saving the file doesn't work then you need to edit it as administrator. (on win7) go to start menu, search for notepad, right-click on notepad, click "Run As Administrator"

in the composer installation windows just click back then next (or close it and start again) and it should work

How can I time a code segment for testing performance with Pythons timeit?

Focus on one specific thing. Disk I/O is slow, so I'd take that out of the test if all you are going to tweak is the database query.

And if you need to time your database execution, look for database tools instead, like asking for the query plan, and note that performance varies not only with the exact query and what indexes you have, but also with the data load (how much data you have stored).

That said, you can simply put your code in a function and run that function with timeit.timeit():

def function_to_repeat():
    # ...

duration = timeit.timeit(function_to_repeat, number=1000)

This would disable the garbage collection, repeatedly call the function_to_repeat() function, and time the total duration of those calls using timeit.default_timer(), which is the most accurate available clock for your specific platform.

You should move setup code out of the repeated function; for example, you should connect to the database first, then time only the queries. Use the setup argument to either import or create those dependencies, and pass them into your function:

def function_to_repeat(var1, var2):
    # ...

duration = timeit.timeit(
    'function_to_repeat(var1, var2)',
    'from __main__ import function_to_repeat, var1, var2', 
    number=1000)

would grab the globals function_to_repeat, var1 and var2 from your script and pass those to the function each repetition.

How to show the "Are you sure you want to navigate away from this page?" when changes committed?

What you want to use is the onunload event in JavaScript.

Here is an example: http://www.w3schools.com/jsref/event_onunload.asp

Where do I get servlet-api.jar from?

You may want to consider using Java EE, which includes the javax.servlet.* packages. If you require a specific version of the servlet api, for instance to target a specific web application server, you will probably want the Java EE version which matches, see this version table.

Difference between \b and \B in regex

Source © Copyright RexEgg.com

Word Boundary: \b*

The word boundary \b matches positions where one side is a word character (usually a letter, digit or underscore—but see below for variations across engines) and the other side is not a word character (for instance, it may be the beginning of the string or a space character).

The regex \bcat\b would, therefore, match cat in a black cat, but it wouldn't match it in catatonic, tomcat or certificate. Removing one of the boundaries, \bcat would match cat in catfish, and cat\b would match cat in tomcat, but not vice-versa. Both, of course, would match cat on its own.

Not-a-word-boundary: \B

\B matches all positions where \b doesn't match. Therefore, it matches:

? When neither side is a word character, for instance at any position in the string $=(@-%++) (including the beginning and end of the string)

? When both sides are a word character, for instance between the H and the i in Hi!

This may not seem very useful, but sometimes \B is just what you want. For instance,

? \Bcat\B will find cat fully surrounded by word characters, as in certificate, but neither on its own nor at the beginning or end of words.

? cat\B will find cat both in certificate and catfish, but neither in tomcat nor on its own.

? \Bcat will find cat both in certificate and tomcat, but neither in catfish nor on its own.

? \Bcat|cat\B will find cat in embedded situation, e.g. in certificate, catfish or tomcat, but not on its own.

How to use mouseover and mouseout in Angular 6

In HTML:

<div (mouseover)="funcName1() (mouseout)="funcName2()">
   // Do what you want 
</div>

In TypeScript:

funcName1(){
 //Do Something
}
funcName2(){
//Do Something
}

log4j:WARN No appenders could be found for logger (running jar file, not web app)

You will find de log4j.properties in solr/examples/resources.

If you don't find the file, i put it here:

#  Logging level
solr.log=logs/
log4j.rootLogger=INFO, file, CONSOLE

log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender

log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%-4r [%t] %-5p %c %x \u2013 %m%n

#- size rotation with log cleanup.
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.MaxFileSize=4MB
log4j.appender.file.MaxBackupIndex=9

#- File to log to and log format
log4j.appender.file.File=${solr.log}/solr.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%-5p - %d{yyyy-MM-dd HH:mm:ss.SSS}; %C; %m\n

log4j.logger.org.apache.zookeeper=WARN
log4j.logger.org.apache.hadoop=WARN

# set to INFO to enable infostream log messages
log4j.logger.org.apache.solr.update.LoggingInfoStream=OFF

Regards

C++ class forward declaration

To perform *new tile_tree_apple the constructor of tile_tree_apple should be called, but in this place compiler knows nothing about tile_tree_apple, so it can't use the constructor.

If you put

tile tile_tree::tick() {if (rand()%20==0) return *new tile_tree_apple;};

in separate cpp file which has the definition of class tile_tree_apple or includes the header file which has the definition everything will work fine.

How to set ChartJS Y axis title?

chart.js supports this by defaul check the link. chartjs

you can set the label in the options attribute.

options object looks like this.

options = {
            scales: {
                yAxes: [
                    {
                        id: 'y-axis-1',
                        display: true,
                        position: 'left',
                        ticks: {
                            callback: function(value, index, values) {
                                return value + "%";
                            }
                        },
                        scaleLabel:{
                            display: true,
                            labelString: 'Average Personal Income',
                            fontColor: "#546372"
                        }
                    }   
                ]
            }
        };

MaxJsonLength exception in ASP.NET MVC during JavaScriptSerializer

You need to read from the configuration section manually before your code returns a JsonResult object. Simply read from web.config in single line:

        var jsonResult = Json(resultsForAjaxUI);
        jsonResult.MaxJsonLength = (ConfigurationManager.GetSection("system.web.extensions/scripting/webServices/jsonSerialization") as System.Web.Configuration.ScriptingJsonSerializationSection).MaxJsonLength;
        return jsonResult;

Be sure you defined configuration element in web.config

Difference between e.target and e.currentTarget

I like visual answers.

When you click #btn, two event handlers get called and they output what you see in the picture.

Demo here: https://jsfiddle.net/ujhe1key/

C++: Converting Hexadecimal to Decimal

only use:

cout << dec << 0x;

Jackson - Deserialize using generic class

First thing you do is serialize, then you can do deserialize.
so when you do serialize, you should use @JsonTypeInfo to let jackson write class information into your json data. What you can do is like this:

Class Data <T> {
    int found;
    @JsonTypeInfo(use=JsonTypeInfo.Id.CLASS, include=JsonTypeInfo.As.PROPERTY, property="@class")
    Class<T> hits
}

Then when you deserialize, you will find jackson has deserialize your data into a class which your variable hits actually is at runtime.

How to convert a Title to a URL slug in jQuery?

function slugify(content) {
   return content.toLowerCase().replace(/ /g,'-').replace(/[^\w-]+/g,'');
}
// slugify('Hello World');
// this will return 'hello-world';

this works for me fine.

Found it on CodeSnipper

Convert JS date time to MySQL datetime

Simple: just Replace the T. Format that I have from my <input class="form-control" type="datetime-local" is : "2021-02-10T18:18"

So just replace the T, and it would look like this: "2021-02-10 18:18" SQL will eat that.

Here is my function:

var CreatedTime = document.getElementById("example-datetime-local-input").value;

var newTime = CreatedTime.replace("T", " ");

Reference: https://www.tutorialrepublic.com/faq/how-to-replace-character-inside-a-string-in-javascript.php#:~:text=Answer%3A%20Use%20the%20JavaScript%20replace,the%20global%20(%20g%20)%20modifier.

https://www.tutorialrepublic.com/codelab.php?topic=faq&file=javascript-replace-character-in-a-string

Converting EditText to int? (Android)

First, find your EditText in the resource of the android studio by using this code:

EditText value = (EditText) findViewById(R.id.editText1);

Then convert EditText value into a string and then parse the value to an int.

int number = Integer.parseInt(x.getText().toString());

This will work

Create SQL script that create database and tables

In SQL Server Management Studio you can right click on the database you want to replicate, and select "Script Database as" to have the tool create the appropriate SQL file to replicate that database on another server. You can repeat this process for each table you want to create, and then merge the files into a single SQL file. Don't forget to add a using statement after you create your Database but prior to any table creation.

In more recent versions of SQL Server you can get this in one file in SSMS.

Right click a database.
Tasks
Generate Scripts

This will launch a wizard where you can script the entire database or just portions. There does not appear to be a T-SQL way of doing this.

Remove an item from array using UnderscoreJS

You can use Underscore .filter

    var arr = [{
      id: 1,
      name: 'a'
    }, {
      id: 2,
      name: 'b'
    }, {
      id: 3,
      name: 'c'
    }];

    var filtered = _(arr).filter(function(item) {
         return item.id !== 3
    });

Can also be written as:

var filtered = arr.filter(function(item) {
    return item.id !== 3
});

var filtered = _.filter(arr, function(item) {
    return item.id !== 3
});

Check Fiddle

You can also use .reject

Android intent for playing video?

from the debug info, it seems that the VideoIntent from the MainActivity cannot send the path of the video to VideoActivity. It gives a NullPointerException error from the uriString. I think some of that code from VideoActivity:

Intent myIntent = getIntent();
String uri = myIntent.getStringExtra("uri");
Bundle b = myIntent.getExtras();

startVideo(b.getString(uri));

Cannot receive the uri from here:

public void playsquirrelmp4(View v) {
    Intent VideoIntent = (new Intent(this, VideoActivity.class));
    VideoIntent.putExtra("android.resource://" + getPackageName()
        + "/"+   R.raw.squirrel, uri);
    startActivity(VideoIntent);
}

What file uses .md extension and how should I edit them?

If you are looking for an editor, I suggest you use http://dillinger.io/. It is a simple browser-based text editor that can render Markdown on the fly.

However, if you prefer an app, and you are using OS X, you could try Mou. It is quite good and full of examples.

Why em instead of px?

Because the em (http://en.wikipedia.org/wiki/Em_(typography)) is directly proportional to the font size currently in use. If the font size is, say, 16 points, one em is 16 points. If your font size is 16 pixels (note: not the same as points), one em is 16 pixels.

This leads to two (related) things:

it's easy to keep proportions, if you choose to edit your font sizes in your CSS later on.
Many browsers support custom font sizes, overriding your CSS. If you design everything in pixels, your layout might break in these cases. But, if you use ems, these overridings should mitigate these problems.

How to run crontab job every week on Sunday

* * * * 0 

you can use above cron job to run on every week on sunday, but in addition on what time you want to run this job for that you can follow below concept :

* * * * *  Command_to_execute
- ? ? ? -
| | | | |
| | | | +?? Day of week (0?6) (Sunday=0) or Sun, Mon, Tue,...
| | | +???- Month (1?12) or Jan, Feb,...
| | +????-? Day of month (1?31)
| +??????? Hour (0?23)
+????????- Minute (0?59)

C# Connecting Through Proxy

Automatic proxy detection is a process by which a Web proxy server is identified by the system and used to send requests on behalf of the client. This feature is also known as Web Proxy Auto-Discovery (WPAD). When automatic proxy detection is enabled, the system attempts to locate a proxy configuration script that is responsible for returning the set of proxies that can be used for the request.

http://msdn.microsoft.com/en-us/library/fze2ytx2.aspx

Sql Server return the value of identity column after insert statement

send an output parameter like

@newId int output

at the end use

    select @newId = Scope_Identity() 

     return @newId

python dict to numpy structured array

Let me propose an improved method when the values of the dictionnary are lists with the same lenght :

import numpy

def dctToNdarray (dd, szFormat = 'f8'):
    '''
    Convert a 'rectangular' dictionnary to numpy NdArray
    entry 
        dd : dictionnary (same len of list 
    retrun
        data : numpy NdArray 
    '''
    names = dd.keys()
    firstKey = dd.keys()[0]
    formats = [szFormat]*len(names)
    dtype = dict(names = names, formats=formats)
    values = [tuple(dd[k][0] for k in dd.keys())]
    data = numpy.array(values, dtype=dtype)
    for i in range(1,len(dd[firstKey])) :
        values = [tuple(dd[k][i] for k in dd.keys())]
        data_tmp = numpy.array(values, dtype=dtype)
        data = numpy.concatenate((data,data_tmp))
    return data

dd = {'a':[1,2.05,25.48],'b':[2,1.07,9],'c':[3,3.01,6.14]}
data = dctToNdarray(dd)
print data.dtype.names
print data

For-loop vs while loop in R

The variable in the for loop is an integer sequence, and so eventually you do this:

> y=as.integer(60000)*as.integer(60000)
Warning message:
In as.integer(60000) * as.integer(60000) : NAs produced by integer overflow

whereas in the while loop you are creating a floating point number.

Its also the reason these things are different:

> seq(0,2,1)
[1] 0 1 2
> seq(0,2)
[1] 0 1 2

Don't believe me?

> identical(seq(0,2),seq(0,2,1))
[1] FALSE

because:

> is.integer(seq(0,2))
[1] TRUE
> is.integer(seq(0,2,1))
[1] FALSE

How do you get/set media volume (not ringtone volume) in Android?

AudioManager audio = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
int currentVolume = audio.getStreamVolume(AudioManager.STREAM_MUSIC);
int maxVolume = audio.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
float percent = 0.7f;
int seventyVolume = (int) (maxVolume*percent);
audio.setStreamVolume(AudioManager.STREAM_MUSIC, seventyVolume, 0);

datetime.parse and making it work with a specific format

DateTime.ParseExact(input,"yyyyMMdd HH:mm",null);

assuming you meant to say that minutes followed the hours, not seconds - your example is a little confusing.

The ParseExact documentation details other overloads, in case you want to have the parse automatically convert to Universal Time or something like that.

As @Joel Coehoorn mentions, there's also the option of using TryParseExact, which will return a Boolean value indicating success or failure of the operation - I'm still on .Net 1.1, so I often forget this one.

If you need to parse other formats, you can check out the Standard DateTime Format Strings.

regex to match a single character that is anything but a space

The following should suffice:

[^ ]

If you want to expand that to anything but white-space (line breaks, tabs, spaces, hard spaces):

[^\s]

\S  # Note this is a CAPITAL 'S'!

Python error when trying to access list by index - "List indices must be integers, not str"

players is a list which needs to be indexed by integers. You seem to be using it like a dictionary. Maybe you could use unpacking -- Something like:

name, score = player

(if the player list is always a constant length).

There's not much more advice we can give you without knowing what query is and how it works.

It's worth pointing out that the entire code you posted doesn't make a whole lot of sense. There's an IndentationError on the second line. Also, your function is looping over some iterable, but unconditionally returning during the first iteration which isn't usually what you actually want to do.

How to call asynchronous method from synchronous method in C#?

javascript date + 7 days

In One line:

new Date(Date.now() + 7 * 24 * 60 * 60 * 1000)

can you add HTTPS functionality to a python flask web server?

this also works in a pinch

from flask import Flask, jsonify


from OpenSSL import SSL
context = SSL.Context(SSL.PROTOCOL_TLSv1_2)
context.use_privatekey_file('server.key')
context.use_certificate_file('server.crt')   


app = Flask(__name__)


@app.route('/')
def index():
    return 'Flask is running!'


@app.route('/data')
def names():
    data = {"names": ["John", "Jacob", "Julie", "Jennifer"]}
    return jsonify(data)


#if __name__ == '__main__':
#    app.run()
if __name__ == '__main__':  
     app.run(host='127.0.0.1', debug=True, ssl_context=context)

How to POST JSON request using Apache HttpClient?

For Apache HttpClient 4.5 or newer version:

    CloseableHttpClient httpclient = HttpClients.createDefault();
    HttpPost httpPost = new HttpPost("http://targethost/login");
    String JSON_STRING="";
    HttpEntity stringEntity = new StringEntity(JSON_STRING,ContentType.APPLICATION_JSON);
    httpPost.setEntity(stringEntity);
    CloseableHttpResponse response2 = httpclient.execute(httpPost);

Note:

1 in order to make the code compile, both httpclient package and httpcore package should be imported.

2 try-catch block has been ommitted.

Reference: appache official guide

the Commons HttpClient project is now end of life, and is no longer being developed. It has been replaced by the Apache HttpComponents project in its HttpClient and HttpCore modules

How to pipe list of files returned by find command to cat to view all the files

Sounds like a job for a shell script to me:

for file in 'find -name *.xml'
do
   grep 'hello' file
done

or something like that

Can you Run Xcode in Linux?

You can run Xcode on Linux NATIVELY using Darling:

Darling is a translation layer that lets you run macOS software on Linux

Once installed you can install Xcode via command-line developer tool following this link.

How does Python return multiple values from a function?

Whenever multiple values are returned from a function in python, does it always convert the multiple values to a list of multiple values and then returns it from the function??

I'm just adding a name and print the result that returns from the function. the type of result is 'tuple'.

  class FigureOut:
   first_name = None
   last_name = None
   def setName(self, name):
      fullname = name.split()
      self.first_name = fullname[0]
      self.last_name = fullname[1]
      self.special_name = fullname[2]
   def getName(self):
      return self.first_name, self.last_name, self.special_name

f = FigureOut()
f.setName("Allen Solly Jun")
name = f.getName()
print type(name)

I don't know whether you have heard about 'first class function'. Python is the language that has 'first class function'

I hope my answer could help you. Happy coding.

Check if a variable exists in a list in Bash

I find it's easier to use the form echo $LIST | xargs -n1 echo | grep $VALUE as illustrated below:

LIST="ITEM1 ITEM2"
VALUE="ITEM1"
if [ -n "`echo $LIST | xargs -n1 echo | grep -e \"^$VALUE`$\" ]; then
    ...
fi

This works for a space-separated list, but you could adapt it to any other delimiter (like :) by doing the following:

LIST="ITEM1:ITEM2"
VALUE="ITEM1"
if [ -n "`echo $LIST | sed 's|:|\\n|g' | grep -e \"^$VALUE`$\"`" ]; then
   ...
fi

Note that the " are required for the test to work.

I ran into a merge conflict. How can I abort the merge?

git merge --abort

Abort the current conflict resolution process, and try to reconstruct the pre-merge state.

If there were uncommitted worktree changes present when the merge started, git merge --abort will in some cases be unable to reconstruct these changes. It is therefore recommended to always commit or stash your changes before running git merge.

git merge --abort is equivalent to git reset --merge when MERGE_HEAD is present.

http://www.git-scm.com/docs/git-merge

Change background image opacity

Try doing this:

_x000D_

.bg_rgba {
  background-image: url(https://picsum.photos/200);
  background-color: rgba(255, 255, 255, 0.486);
  background-blend-mode: overlay;
  width: 200px;
  height: 200px;
  border: 1px solid black;
}

_x000D_

<div class="bg_rgba"></div>

_x000D_

worked in my case. You can reduce or increase the background-color alpha value according to your needs.

How do I get the n-th level parent of an element in jQuery?

A faster way is to use javascript directly, eg.

var parent = $(innerdiv.get(0).parentNode.parentNode.parentNode);

This runs significantly faster on my browser than chaining jQuery .parent() calls.

See: http://jsperf.com/jquery-get-3rd-level-parent

Java : Sort integer array without using Arrays.sort()

Bubble sort can be used here:

 //Time complexity: O(n^2)
public static int[] bubbleSort(final int[] arr) {

    if (arr == null || arr.length <= 1) {
        return arr;
    }

    for (int i = 0; i < arr.length; i++) {
        for (int j = 1; j < arr.length - i; j++) {
            if (arr[j - 1] > arr[j]) {
                arr[j] = arr[j] + arr[j - 1];
                arr[j - 1] = arr[j] - arr[j - 1];
                arr[j] = arr[j] - arr[j - 1];
            }
        }
    }

    return arr;
}

How can I know which radio button is selected via jQuery?

If you only have 1 set of radio buttons on 1 form, the jQuery code is as simple as this:

$( "input:checked" ).val()

MySQL DISTINCT on a GROUP_CONCAT()

Other answers to this question do not return what the OP needs, they will return a string like:

test1 test2 test3 test1 test3 test4

(notice that test1 and test3 are duplicated) while the OP wants to return this string:

test1 test2 test3 test4

the problem here is that the string "test1 test3" is duplicated and is inserted only once, but all of the others are distinct to each other ("test1 test2 test3" is distinct than "test1 test3", even if some tests contained in the whole string are duplicated).

What we need to do here is to split each string into different rows, and we first need to create a numbers table:

CREATE TABLE numbers (n INT);
INSERT INTO numbers VALUES
(1),(2),(3),(4),(5),(6),(7),(8),(9),(10);

then we can run this query:

SELECT
  SUBSTRING_INDEX(
    SUBSTRING_INDEX(tableName.categories, ' ', numbers.n),
    ' ',
    -1) category
FROM
  numbers INNER JOIN tableName
  ON
    LENGTH(tableName.categories)>=
    LENGTH(REPLACE(tableName.categories, ' ', ''))+numbers.n-1;

and we get a result like this:

test1
test4
test1
test1
test2
test3
test3
test3

and then we can apply GROUP_CONCAT aggregate function, using DISTINCT clause:

SELECT
  GROUP_CONCAT(DISTINCT category ORDER BY category SEPARATOR ' ')
FROM (
  SELECT
    SUBSTRING_INDEX(SUBSTRING_INDEX(tableName.categories, ' ', numbers.n), ' ', -1) category
  FROM
    numbers INNER JOIN tableName
    ON LENGTH(tableName.categories)>=LENGTH(REPLACE(tableName.categories, ' ', ''))+numbers.n-1
  ) s;

Please see fiddle here.

What do multiple arrow functions mean in javascript?

Think of it like this, every time you see a arrow, you replace it with function.
function parameters are defined before the arrow.
So in your example:

field => // function(field){}
e => { e.preventDefault(); } // function(e){e.preventDefault();}

and then together:

function (field) { 
    return function (e) { 
        e.preventDefault(); 
    };
}

From the docs:

// Basic syntax:
(param1, param2, paramN) => { statements }
(param1, param2, paramN) => expression
   // equivalent to:  => { return expression; }

// Parentheses are optional when there's only one argument:
singleParam => { statements }
singleParam => expression

How to make HTML Text unselectable

The full modern solution to your problem is purely CSS-based, but note that older browsers won't support it, in which cases you'd need to fallback to solutions such as the others have provided.

So in pure CSS:

-webkit-user-select: none;
-khtml-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
-o-user-select: none;
user-select: none;

However the mouse cursor will still change to a caret when over the element's text, so you add to that:

cursor: default;

Modern CSS is pretty elegant.

bootstrap jquery show.bs.modal event won't fire

i used jQuery's event delegation /bubbling... that worked for me. See below:

$(document).on('click', '#btnSubmit', function () {
                alert('hi loo');
            })

very good info too: https://learn.jquery.com/events/event-delegation/

understanding private setters

Yes, you are using encapsulation by using properties, but there are more nuances to encapsulation than just taking control over how properties are read and written. Denying a property to be set from outside the class can be useful both for robustness and performance.

An immutable class is a class that doesn't change once it's created, so private setters (or no setters at all) is needed to protect the properties.

Private setters came into more frequent use with the property shorthand that was instroduced in C# 3. In C# 2 the setter was often just omitted, and the private data accessed directly when set.

This property:

public int Size { get; private set; }

is the same as:

private int _size;
public int Size {
  get { return _size; }
  private set { _size = value; }
}

except, the name of the backing variable is internally created by the compiler, so you can't access it directly.

With the shorthand property the private setter is needed to create a read-only property, as you can't access the backing variable directly.

Time complexity of Euclid's Algorithm

At every step, there are two cases

b >= a / 2, then a, b = b, a % b will make b at most half of its previous value

b < a / 2, then a, b = b, a % b will make a at most half of its previous value, since b is less than a / 2

So at every step, the algorithm will reduce at least one number to at least half less.

In at most O(log a)+O(log b) step, this will be reduced to the simple cases. Which yield an O(log n) algorithm, where n is the upper limit of a and b.

I have found it here

error: cast from 'void*' to 'int' loses precision

Again, all of the answers above missed the point badly. The OP wanted to convert a pointer value to a int value, instead, most the answers, one way or the other, tried to wrongly convert the content of arg points to to a int value. And, most of these will not even work on gcc4.

The correct answer is, if one does not mind losing data precision,

int x = *((int*)(&arg));

This works on GCC4.

The best way is, if one can, do not do such casting, instead, if the same memory address has to be shared for pointer and int (e.g. for saving RAM), use union, and make sure, if the mem address is treated as an int only if you know it was last set as an int.

Keep overflow div scrolled to bottom unless user scrolls up

Jim Hall's answer is preferrable because while it indeed does not scroll to the bottom when you're scrolled up, it is also pure CSS.

Very much unfortunately however, this is not a stable solution: In chrome (possibly due to the 1-px-issue described by dotnetCarpenter above), scrollTop behaves inaccurately by 1 pixel, even without user interaction (upon element add). You can set scrollTop = scrollHeight - clientHeight, but that will keep the div in position when another element is added, aka the "keep itself at bottom" feature is not working anymore.

So, in short, adding a small amount of Javascript (sigh) will fix this and fulfill all requirements:

Something like https://codepen.io/anon/pen/pdrLEZ this (example by Coo), and after adding an element to the list, also the following:

container = ...
if(container.scrollHeight - container.clientHeight - container.scrollTop <= 29) {
    container.scrollTop = container.scrollHeight - container.clientHeight;
}

where 29 is the height of one line.

So, when the user scrolls up half a line (if that is even possible?), the Javascript will ignore it and scroll to the bottom. But I guess this is neglectible. And, it fixes the Chrome 1 px thingy.

Overwriting my local branch with remote branch

first, create a new branch in the current position (in case you need your old 'screwed up' history):

git branch fubar-pin

update your list of remote branches and sync new commits:

git fetch --all

then, reset your branch to the point where origin/branch points to:

git reset --hard origin/branch

be careful, this will remove any changes from your working tree!

What is the meaning of "int(a[::-1])" in Python?

Assuming a is a string. The Slice notation in python has the syntax -

list[<start>:<stop>:<step>]

So, when you do a[::-1], it starts from the end towards the first taking each element. So it reverses a. This is applicable for lists/tuples as well.

Example -

>>> a = '1234'
>>> a[::-1]
'4321'

Then you convert it to int and then back to string (Though not sure why you do that) , that just gives you back the string.

What is the regular expression to allow uppercase/lowercase (alphabetical characters), periods, spaces and dashes only?

The regex you're looking for is ^[A-Za-z.\s_-]+$

^ asserts that the regular expression must match at the beginning of the subject
[] is a character class - any character that matches inside this expression is allowed
A-Z allows a range of uppercase characters
a-z allows a range of lowercase characters
. matches a period rather than a range of characters
\s matches whitespace (spaces and tabs)
_ matches an underscore
- matches a dash (hyphen); we have it as the last character in the character class so it doesn't get interpreted as being part of a character range. We could also escape it (\-) instead and put it anywhere in the character class, but that's less clear
+ asserts that the preceding expression (in our case, the character class) must match one or more times
$ Finally, this asserts that we're now at the end of the subject

When you're testing regular expressions, you'll likely find a tool like regexpal helpful. This allows you to see your regular expression match (or fail to match) your sample data in real time as you write it.

Select columns based on string match - dplyr::select

You can try:

select(data, matches("search_string"))

It is more general than contains - you can use regex (e.g. "one_string|or_the_other").

For more examples, see: http://rpackages.ianhowson.com/cran/dplyr/man/select.html.

Unable to add window -- token android.os.BinderProxy is not valid; is your activity running?

After execute the thread, add these two line of code, and that will solve the issue.

Looper.loop();
Looper.myLooper().quit();

Convert JSON string to Javascript array

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

On Debian, using openjdk version "1.8.0_212", I found cacerts here:

 /etc/ssl/certs/java/cacerts

Sure would be handy if there was a standard command that would print out this path.

What is the use of GO in SQL Server Management Studio & Transact SQL?

The GO command isn't a Transact-SQL statement, but a special command recognized by several MS utilities including SQL Server Management Studio code editor.

The GO command is used to group SQL commands into batches which are sent to the server together. The commands included in the batch, that is, the set of commands since the last GO command or the start of the session, must be logically consistent. For example, you can't define a variable in one batch and then use it in another since the scope of the variable is limited to the batch in which it's defined.

For more information, see http://msdn.microsoft.com/en-us/library/ms188037.aspx.

Programs & Examples On #Get method

How to get parameters from the URL with JSP

how to call a method in another Activity from Activity

List<T> or IList<T>

How/when to use ng-click to call a route?

C# testing to see if a string is an integer?

How to change the font and font size of an HTML input tag?

Confusing "duplicate identifier" Typescript error message

Fix

Open fancybox from function

How to avoid a System.Runtime.InteropServices.COMException?

Collection was modified; enumeration operation may not execute

Global npm install location on windows?

Plotting histograms from grouped data in a pandas DataFrame

Spring RequestMapping for controllers that produce and consume JSON

Remove a HTML tag but keep the innerHtml

Calling ASP.NET MVC Action Methods from JavaScript

Troubleshooting "The use statement with non-compound name ... has no effect"

Where is android studio building my .apk file?

How can I remove jenkins completely from linux

Selenium Webdriver: Entering text into text field

Java: How to Indent XML Generated by Transformer

How to visualize an XML schema?

How to make CREATE OR REPLACE VIEW work in SQL Server?

Background color on input type=button :hover state sticks in IE

error: (-215) !empty() in function detectMultiScale

Spring - @Transactional - What happens in background?

malloc for struct and pointer in C

How to get status code from webclient?

How to add row in JTable?

How to add Tomcat Server in eclipse

Java: method to get position of a match in a String?

push_back vs emplace_back

How to retrieve SQL result column value using column name in Python?

Using GCC to produce readable assembly?

ValueError: could not broadcast input array from shape (224,224,3) into shape (224,224)

Convert objective-c typedef to its string equivalent

How do I determine k when using k-means clustering?

Visual Studio Expand/Collapse keyboard shortcuts

How to prevent Right Click option using jquery

How to change legend size with matplotlib.pyplot

what is the use of "response.setContentType("text/html")" in servlet

Adding multiple class using ng-class

How to recompile with -fPIC

C# winforms combobox dynamic autocomplete

Clearing NSUserDefaults

Changing the default icon in a Windows Forms application

sh: 0: getcwd() failed: No such file or directory on cited drive

Select all elements with a "data-xxx" attribute without using jQuery

How to view the dependency tree of a given npm module?

How do MySQL indexes work?

How can I get the line number which threw exception?

How to establish ssh key pair when "Host key verification failed"

Adding a dictionary to another

How to avoid variable substitution in Oracle SQL Developer with 'trinidad & tobago'

Show/hide image with JavaScript

var functionName = function() {} vs function functionName() {}

find difference between two text files with one item per line

Javascript select onchange='this.form.submit()'

TLS 1.2 not working in cURL

How to add image for button in android?

Initialise numpy array of unknown length

In Typescript, what is the ! (exclamation mark / bang) operator when dereferencing a member?

Getting the name of a variable as a string

How to find common elements from multiple vectors?

Convert java.util.Date to String

password-check directive in angularjs

how to assign a block of html code to a javascript variable

HSL to RGB color conversion

C# Code from Mohsen's answer.

Hsl To Rgba

Rgba To Hsl

How to add text to JFrame?

Github Push Error: RPC failed; result=22, HTTP code = 413

Request redirect to /Account/Login?ReturnUrl=%2f since MVC 3 install on server

How to read a list of files from a folder using PHP?

What is the difference between RTP or RTSP in a streaming server?

nginx: how to create an alias url route?

Mockito verify order / sequence of method calls

Angular2 equivalent of $document.ready()