how to solve Error cannot add duplicate collection entry of type add with unique key attribute 'value' in iis 7

All you need is a <clear /> tag. Here's an example:

<configuration>
  <system.webServer>
    <defaultDocument>
      <files>
        <clear />
        <add value="default.aspx" />
      </files>
    </defaultDocument>
  </system.webServer>
</configuration>

IE9 JavaScript error: SCRIPT5007: Unable to get value of the property 'ui': object is null or undefined

check whether there is a comma at the end.

                            },
                            {
                                name: '???. ??????? ?? ?????. ?3/?',
                                data: graph_high3,
                                dataGrouping: {
                                    units: groupingUnits,
                                    groupPixelWidth: 40,
                                    approximation: "average",
                                    enabled: true,
                                    units: [[
                                            'minute',
                                            [1]
                                        ]]
                                }
                            }   // if , - SCRIPT5007

ASP.NET IIS Web.config [Internal Server Error]

I had the same problem.

Solution:

Click the right button in your site folder in "iis"
"Convert to Application".

Web Application Problems (web.config errors) HTTP 500.19 with IIS7.5 and ASP.NET v2

In my case, there was something wrong with the .NET Core Windows Hosting Bundle installation.

I had that installed and had restarted IIS using ("net stop was /y" and "net start w3svc") after installation, but I would get that 500.19 error with Error Code 0x8007000d and Config Source -1: 0:.

I managed to resolve the issue by repairing the .NET Core Windows Hosting Bundle installation and restarting IIS using the commands I mentioned above.

Hope this helps someone!

Sys is undefined

I had the same problem after updating my AjaxControlToolkit.dll to the latest version 4.1.7.725 from 4.1.60623.0. I've searched and came up to this page, but none of the answers help me. After looking to the sample website of the Ajax Control Toolkit that is in the CodePlex zip file, I have realized that the <asp:ScriptManager> replaced by the new <ajaxtoolkit:ToolkitScriptManager>. I did so and there is no Sys.Extended is undefined any more.

Google Apps Script to open a URL

Building of off an earlier example, I think there is a cleaner way of doing this. Create an index.html file in your project and using Stephen's code from above, just convert it into an HTML doc.

<!DOCTYPE html>
<html>
  <base target="_top">
  <script>
    function onSuccess(url) {
      var a = document.createElement("a"); 
      a.href = url;
      a.target = "_blank";
      window.close = function () {
        window.setTimeout(function() {
          google.script.host.close();
        }, 9);
      };
      if (document.createEvent) {
        var event = document.createEvent("MouseEvents");
        if (navigator.userAgent.toLowerCase().indexOf("firefox") > -1) {
          window.document.body.append(a);
        }                        
        event.initEvent("click", true, true); 
        a.dispatchEvent(event);
      } else {
        a.click();
      }
      close();
    }

    function onFailure(url) {
      var div = document.getElementById('failureContent');
      var link = '<a href="' + url + '" target="_blank">Process</a>';
      div.innerHtml = "Failure to open automatically: " + link;
    }

    google.script.run.withSuccessHandler(onSuccess).withFailureHandler(onFailure).getUrl();
  </script>
  <body>
    <div id="failureContent"></div>
  </body>
  <script>
    google.script.host.setHeight(40);
    google.script.host.setWidth(410);
  </script>
</html>

Then, in your Code.gs script, you can have something like the following,

function getUrl() {
  return 'http://whatever.com';
}

function openUrl() {
  var html = HtmlService.createHtmlOutputFromFile("index");
  html.setWidth(90).setHeight(1);
  var ui = SpreadsheetApp.getUi().showModalDialog(html, "Opening ..." );
}

How do I check if a Sql server string is null or empty

Use the LEN function to check for null or empty values. You can just use LEN(@SomeVarcharParm) > 0. This will return false if the value is NULL, '', or ' '. This is because LEN(NULL) returns NULL and NULL > 0 returns false. Also, LEN(' ') returns 0. See for yourself run:

SELECT 
 CASE WHEN NULL > 0 THEN 'NULL > 0 = true' ELSE 'NULL > 0 = false' END,
 CASE WHEN LEN(NULL) > 0 THEN 'LEN(NULL) = true' ELSE 'LEN(NULL) = false' END,
 CASE WHEN LEN('') > 0 THEN 'LEN('''') > 0 = true' ELSE 'LEN('''') > 0 = false' END,
 CASE WHEN LEN(' ') > 0 THEN 'LEN('' '') > 0 = true' ELSE 'LEN('' '') > 0 = false' END,
 CASE WHEN LEN(' test ') > 0 THEN 'LEN('' test '') > 0 = true' ELSE 'LEN('' test '') > 0 = false' END

How to add scroll bar to the Relative Layout?

Check the following sample layout file

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/ScrollView01" android:layout_width="fill_parent"
android:layout_height="fill_parent" android:background="@color/white">
<RelativeLayout android:layout_height="fill_parent"
    android:layout_width="fill_parent">
    <ImageView android:id="@+id/image1"
        android:layout_width="wrap_content"  
                    android:layout_height="wrap_content"
        android:layout_marginLeft="15dip" android:layout_marginTop="15dip"
        android:src="@drawable/btn_blank" android:clickable="true" /> </RelativeLayout> </ScrollView>

What does .shape[] do in "for i in range(Y.shape[0])"?

The shape attribute for numpy arrays returns the dimensions of the array. If Y has n rows and m columns, then Y.shape is (n,m). So Y.shape[0] is n.

In [46]: Y = np.arange(12).reshape(3,4)

In [47]: Y
Out[47]: 
array([[ 0,  1,  2,  3],
       [ 4,  5,  6,  7],
       [ 8,  9, 10, 11]])

In [48]: Y.shape
Out[48]: (3, 4)

In [49]: Y.shape[0]
Out[49]: 3

Converting EditText to int? (Android)

In Kotlin, you can do this.

val editText1 = findViewById(R.id.editText)
val intNum = editText1.text.toString().toInt()

Select data between a date/time range

A simple way :

select  * from  hockey_stats 
where  game_date >= '2012-03-11' and game_date  <= '2012-05-11'

Wait until page is loaded with Selenium WebDriver for Python

The webdriver will wait for a page to load by default via .get() method.

As you may be looking for some specific element as @user227215 said, you should use WebDriverWait to wait for an element located in your page:

from selenium import webdriver
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By
from selenium.common.exceptions import TimeoutException

browser = webdriver.Firefox()
browser.get("url")
delay = 3 # seconds
try:
    myElem = WebDriverWait(browser, delay).until(EC.presence_of_element_located((By.ID, 'IdOfMyElement')))
    print "Page is ready!"
except TimeoutException:
    print "Loading took too much time!"

I have used it for checking alerts. You can use any other type methods to find the locator.

EDIT 1:

I should mention that the webdriver will wait for a page to load by default. It does not wait for loading inside frames or for ajax requests. It means when you use .get('url'), your browser will wait until the page is completely loaded and then go to the next command in the code. But when you are posting an ajax request, webdriver does not wait and it's your responsibility to wait an appropriate amount of time for the page or a part of page to load; so there is a module named expected_conditions.

How to properly -filter multiple strings in a PowerShell copy script

use the include is the easiest way as per

http://www.vistax64.com/powershell/168315-get-childitem-filter-files-multiple-extensions.html

Checking if a date is valid in javascript

Try this:

var date = new Date();
console.log(date instanceof Date && !isNaN(date.valueOf()));

This should return true.

UPDATED: Added isNaN check to handle the case commented by Julian H. Lam

PHPUnit assert that an exception was thrown?

For PHPUnit 5.7.27 and PHP 5.6 and to test multiple exceptions in one test, it was important to force the exception testing. Using exception handling alone to assert the instance of Exception will skip testing the situation if no exception occurs.

public function testSomeFunction() {

    $e=null;
    $targetClassObj= new TargetClass();
    try {
        $targetClassObj->doSomething();
    } catch ( \Exception $e ) {
    }
    $this->assertInstanceOf(\Exception::class,$e);
    $this->assertEquals('Some message',$e->getMessage());

    $e=null;
    try {
        $targetClassObj->doSomethingElse();
    } catch ( Exception $e ) {
    }
    $this->assertInstanceOf(\Exception::class,$e);
    $this->assertEquals('Another message',$e->getMessage());

}

How to print out a variable in makefile

This can be done in a generic way and can be very useful when debugging a complex makefile. Following the same technique as described in another answer, you can insert the following into any makefile:

# if the first command line argument is "print"
ifeq ($(firstword $(MAKECMDGOALS)),print)

  # take the rest of the arguments as variable names
  VAR_NAMES := $(wordlist 2,$(words $(MAKECMDGOALS)),$(MAKECMDGOALS))

  # turn them into do-nothing targets
  $(eval $(VAR_NAMES):;@:))

  # then print them
  .PHONY: print
  print:
          @$(foreach var,$(VAR_NAMES),\
            echo '$(var) = $($(var))';)
endif

Then you can just do "make print" to dump the value of any variable:

$ make print CXXFLAGS
CXXFLAGS = -g -Wall

How can I auto increment the C# assembly version via our CI platform (Hudson)?

.NET does this for you. In your AssemblyInfo.cs file, set your assembly version to major.minor.* (for example: 1.0.*).

When you build your project the version is auto generated.

The build and revision numbers are generated based on the date, using the unix epoch, I believe. The build is based on the current day, and the revision is based on the number of seconds since midnight.

Simple linked list in C++

head is defined inside the main as follows.

struct Node *head = new Node;

But you are changing the head in addNode() and initNode() functions only. The changes are not reflected back on the main.

Make the declaration of the head as global and do not pass it to functions.

The functions should be as follows.

void initNode(int n){
    head->x = n;
    head->next = NULL;
}

void addNode(int n){
    struct Node *NewNode = new Node;
    NewNode-> x = n;
    NewNode->next = head;
    head = NewNode;
}

Convert HttpPostedFileBase to byte[]

As Darin says, you can read from the input stream - but I'd avoid relying on all the data being available in a single go. If you're using .NET 4 this is simple:

MemoryStream target = new MemoryStream();
model.File.InputStream.CopyTo(target);
byte[] data = target.ToArray();

It's easy enough to write the equivalent of CopyTo in .NET 3.5 if you want. The important part is that you read from HttpPostedFileBase.InputStream.

For efficient purposes you could check whether the stream returned is already a MemoryStream:

byte[] data;
using (Stream inputStream = model.File.InputStream)
{
    MemoryStream memoryStream = inputStream as MemoryStream;
    if (memoryStream == null)
    {
        memoryStream = new MemoryStream();
        inputStream.CopyTo(memoryStream);
    }
    data = memoryStream.ToArray();
}

Colouring plot by factor in R

The col argument in the plot function assign colors automatically to a vector of integers. If you convert iris$Species to numeric, notice you have a vector of 1,2 and 3s So you can apply this as:

plot(iris$Sepal.Length, iris$Sepal.Width, col=as.numeric(iris$Species))

Suppose you want red, blue and green instead of the default colors, then you can simply adjust it:

plot(iris$Sepal.Length, iris$Sepal.Width, col=c('red', 'blue', 'green')[as.numeric(iris$Species)])

You can probably see how to further modify the code above to get any unique combination of colors.

Python extending with - using super() Python 3 vs Python 2

In short, they are equivalent. Let's have a history view:

(1) at first, the function looks like this.

    class MySubClass(MySuperClass):
        def __init__(self):
            MySuperClass.__init__(self)

(2) to make code more abstract (and more portable). A common method to get Super-Class is invented like:

    super(<class>, <instance>)

And init function can be:

    class MySubClassBetter(MySuperClass):
        def __init__(self):
            super(MySubClassBetter, self).__init__()

However requiring an explicit passing of both the class and instance break the DRY (Don't Repeat Yourself) rule a bit.

(3) in V3. It is more smart,

    super()

is enough in most case. You can refer to http://www.python.org/dev/peps/pep-3135/

Converting NSString to NSDate (and back again)

NSString *mystr=@"Your string date";

NSCalendar *cal = [NSCalendar currentCalendar];
NSDate *now = [dateFormatter dateFromString:mystr];

Nslog(@"%@",now);

If you want set the format use below code:

NSString *dateString = @"01-02-2010";
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];

// this is important - we set our input date format to match our input string
// if format doesn't match you'll get nil from your string, so be careful
[dateFormatter setDateFormat:@"dd-MM-yyyy"];
NSDate *dateFromString = [[NSDate alloc] init];

// voila!
dateFromString = [dateFormatter dateFromString:dateString];
Nslog(@"%@",[dateFormatter dateFromString:dateString]);

diff current working copy of a file with another branch's committed copy

The following works for me:

git diff master:foo foo

In the past, it may have been:

git diff foo master:foo

HTML5 LocalStorage: Checking if a key exists

This method worked for me:

if ("username" in localStorage) {
    alert('yes');
} else {
    alert('no');
}

Loop through JSON in EJS

JSON.stringify(data).length return string length not Object length, you can use Object.keys.

<% for(var i=0; i < Object.keys(data).length ; i++) {%>

https://stackoverflow.com/a/14379528/3224296

How can I use UserDefaults in Swift?

In class A, set value for key:

let text = "hai"  
UserDefaults.standard.setValue(text, forKey: "textValue")

In class B, get the value for the text using the key which declared in class A and assign it to respective variable which you need:

var valueOfText  = UserDefaults.value(forKey: "textValue")

Stacked Tabs in Bootstrap 3

You should not need to add this back in. This was removed purposefully. The documentation has changed somewhat and the CSS class that is necessary ("nav-stacked") is only mentioned under the pills component, but should work for tabs as well.

This tutorial shows how to use the Bootstrap 3 setup properly to do vertical tabs:
tutsme-webdesign.info/bootstrap-3-toggable-tabs-and-pills

How to expire a cookie in 30 minutes using jQuery?

30 minutes is 30 * 60 * 1000 miliseconds. Add that to the current date to specify an expiration date 30 minutes in the future.

 var date = new Date();
 var minutes = 30;
 date.setTime(date.getTime() + (minutes * 60 * 1000));
 $.cookie("example", "foo", { expires: date });

Relative instead of Absolute paths in Excel VBA

You could use one of these for the relative path root:

ActiveWorkbook.Path
ThisWorkbook.Path
App.Path

How to cherry-pick multiple commits

If you have selective revisions to merge, say A, C, F, J from A,B,C,D,E,F,G,H,I,J commits, simply use below command:

git cherry-pick A C F J

How to check if a socket is connected/disconnected in C#?

~~Use Socket.Connected Property.~~

--UPDATE--

As Paul Turner answered Socket.Connected cannot be used in this situation. You need to poll connection every time to see if connection is still active. See 2

jQuery detect if string contains something

use Contains of jquery Contains like this

if ($('.type:contains("> <")').length > 0)
{
 //do stuffs to change 
}

How do I open port 22 in OS X 10.6.7

As per macOS 10.14.5, below are the details:

Go to

system preferences > sharing > remote login.

How to Clone Objects

Since the MemberwiseClone() method is not public, I created this simple extension method in order to make it easier to clone objects:

public static T Clone<T>(this T obj)
{
    var inst = obj.GetType().GetMethod("MemberwiseClone", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic);

    return (T)inst?.Invoke(obj, null);
}

Usage:

var clone = myObject.Clone();

Get response from PHP file using AJAX

var data="your data";//ex data="id="+id;
      $.ajax({
       method : "POST",
       url : "file name",  //url: "demo.php"
       data : "data",
       success : function(result){
               //set result to div or target 
              //ex $("#divid).html(result)
        }
   });

react-native: command not found

If you're using yarn, you may have to run commands with yarn in front. Example:

yarn react-native info

What is mutex and semaphore in Java ? What is the main difference?

Semaphore can be counted, while mutex can only count to 1.

Suppose you have a thread running which accepts client connections. This thread can handle 10 clients simultaneously. Then each new client sets the semaphore until it reaches 10. When the Semaphore has 10 flags, then your thread won't accept new connections

Mutex are usually used for guarding stuff. Suppose your 10 clients can access multiple parts of the system. Then you can protect a part of the system with a mutex so when 1 client is connected to that sub-system, no one else should have access. You can use a Semaphore for this purpose too. A mutex is a "Mutual Exclusion Semaphore".

Plotting a python dict in order of key values

Simply pass the sorted items from the dictionary to the plot() function. concentration.items() returns a list of tuples where each tuple contains a key from the dictionary and its corresponding value.

You can take advantage of list unpacking (with *) to pass the sorted data directly to zip, and then again to pass it into plot():

import matplotlib.pyplot as plt

concentration = {
    0: 0.19849878712984576,
    5000: 0.093917341754771386,
    10000: 0.075060643507712022,
    20000: 0.06673074282575861,
    30000: 0.057119318961966224,
    50000: 0.046134834546203485,
    100000: 0.032495766396631424,
    200000: 0.018536317451599615,
    500000: 0.0059499290585381479}

plt.plot(*zip(*sorted(concentration.items())))
plt.show()

sorted() sorts tuples in the order of the tuple's items so you don't need to specify a key function because the tuples returned by dict.item() already begin with the key value.

Two models in one view in ASP MVC 3

Another option which doesn't have the need to create a custom Model is to use a Tuple<>.

@model Tuple<Person,Order>

It's not as clean as creating a new class which contains both, as per Andi's answer, but it is viable.

How do you remove columns from a data.frame?

From http://www.statmethods.net/management/subset.html

# exclude variables v1, v2, v3
myvars <- names(mydata) %in% c("v1", "v2", "v3") 
newdata <- mydata[!myvars]

# exclude 3rd and 5th variable 
newdata <- mydata[c(-3,-5)]

# delete variables v3 and v5
mydata$v3 <- mydata$v5 <- NULL

Thought it was really clever make a list of "not to include"

Is it possible to change the location of packages for NuGet?

None of this answers was working for me (Nuget 2.8.6) because of missing some tips, will try to add them here as it might be useful for others.

After reading the following sources:
https://docs.nuget.org/consume/NuGet-Config-Settings
https://github.com/NuGet/Home/issues/1346
It appears that

To make working Install-Package properly with different repositoryPath you need to use forward slashes, it's because they are using Uri object to parse location.
Without $ on the begining it was still ignoring my settings.
NuGet caches config file, so after modifications you need to reload solution/VS.
I had also strange issue while using command of NuGet.exe to set this option, as it modified my global NuGet.exe under AppData\Roaming\NuGet and started to restore packages there (Since that file has higher priority, just guessing).

E.g.

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <solution>
    <add key="disableSourceControlIntegration" value="true" />
  </solution>
  <config>
    <add key="repositorypath" value="$/../../../Common/packages" />
  </config>
</configuration>

You can also use NuGet command to ensure that syntax will be correct like this:

NuGet.exe config -Set repositoryPath=$/../../../Common/packages -ConfigFile NuGet.Config

Convert an int to ASCII character

This is how I converted a number to an ASCII code. 0 though 9 in hex code is 0x30-0x39. 6 would be 0x36.

unsigned int temp = 6;
or you can use unsigned char temp = 6;
unsigned char num;
 num = 0x30| temp;

this will give you the ASCII value for 6. You do the same for 0 - 9

to convert ASCII to a numeric value I came up with this code.

unsigned char num,code;
code = 0x39; // ASCII Code for 9 in Hex
num = 0&0F & code;

When should one use a spinlock instead of mutex?

Please also note that on certain environments and conditions (such as running on windows on dispatch level >= DISPATCH LEVEL), you cannot use mutex but rather spinlock. On unix - same thing.

Here is equivalent question on competitor stackexchange unix site: https://unix.stackexchange.com/questions/5107/why-are-spin-locks-good-choices-in-linux-kernel-design-instead-of-something-more

Info on dispatching on windows systems: http://download.microsoft.com/download/e/b/a/eba1050f-a31d-436b-9281-92cdfeae4b45/IRQL_thread.doc

Difference between applicationContext.xml and spring-servlet.xml in Spring Framework

Application contexts provide a means for resolving text messages, including support for i18n of those messages. Application contexts provide a generic way to load file resources, such as images. Application contexts can publish events to beans that are registered as listeners. Certain operations on the container or beans in the container, which have to be handled in a programmatic fashion with a bean factory, can be handled declaratively in an application context. ResourceLoader support: Spring’s Resource interface us a flexible generic abstraction for handling low-level resources. An application context itself is a ResourceLoader, Hence provides an application with access to deployment-specific Resource instances. MessageSource support: The application context implements MessageSource, an interface used to obtain localized messages, with the actual implementation being pluggable

How to declare a global variable in C++

Declare extern int x; in file.h. And define int x; only in one cpp file.cpp.

XmlSerializer: remove unnecessary xsi and xsd namespaces

Since Dave asked for me to repeat my answer to Omitting all xsi and xsd namespaces when serializing an object in .NET, I have updated this post and repeated my answer here from the afore-mentioned link. The example used in this answer is the same example used for the other question. What follows is copied, verbatim.

After reading Microsoft's documentation and several solutions online, I have discovered the solution to this problem. It works with both the built-in XmlSerializer and custom XML serialization via IXmlSerialiazble.

To whit, I'll use the same MyTypeWithNamespaces XML sample that's been used in the answers to this question so far.

[XmlRoot("MyTypeWithNamespaces", Namespace="urn:Abracadabra", IsNullable=false)]
public class MyTypeWithNamespaces
{
    // As noted below, per Microsoft's documentation, if the class exposes a public
    // member of type XmlSerializerNamespaces decorated with the 
    // XmlNamespacesDeclarationAttribute, then the XmlSerializer will utilize those
    // namespaces during serialization.
    public MyTypeWithNamespaces( )
    {
        this._namespaces = new XmlSerializerNamespaces(new XmlQualifiedName[] {
            // Don't do this!! Microsoft's documentation explicitly says it's not supported.
            // It doesn't throw any exceptions, but in my testing, it didn't always work.

            // new XmlQualifiedName(string.Empty, string.Empty),  // And don't do this:
            // new XmlQualifiedName("", "")

            // DO THIS:
            new XmlQualifiedName(string.Empty, "urn:Abracadabra") // Default Namespace
            // Add any other namespaces, with prefixes, here.
        });
    }

    // If you have other constructors, make sure to call the default constructor.
    public MyTypeWithNamespaces(string label, int epoch) : this( )
    {
        this._label = label;
        this._epoch = epoch;
    }

    // An element with a declared namespace different than the namespace
    // of the enclosing type.
    [XmlElement(Namespace="urn:Whoohoo")]
    public string Label
    {
        get { return this._label; }
        set { this._label = value; }
    }
    private string _label;

    // An element whose tag will be the same name as the property name.
    // Also, this element will inherit the namespace of the enclosing type.
    public int Epoch
    {
        get { return this._epoch; }
        set { this._epoch = value; }
    }
    private int _epoch;

    // Per Microsoft's documentation, you can add some public member that
    // returns a XmlSerializerNamespaces object. They use a public field,
    // but that's sloppy. So I'll use a private backed-field with a public
    // getter property. Also, per the documentation, for this to work with
    // the XmlSerializer, decorate it with the XmlNamespaceDeclarations
    // attribute.
    [XmlNamespaceDeclarations]
    public XmlSerializerNamespaces Namespaces
    {
        get { return this._namespaces; }
    }
    private XmlSerializerNamespaces _namespaces;
}

That's all to this class. Now, some objected to having an XmlSerializerNamespaces object somewhere within their classes; but as you can see, I neatly tucked it away in the default constructor and exposed a public property to return the namespaces.

Now, when it comes time to serialize the class, you would use the following code:

MyTypeWithNamespaces myType = new MyTypeWithNamespaces("myLabel", 42);

/******
   OK, I just figured I could do this to make the code shorter, so I commented out the
   below and replaced it with what follows:

// You have to use this constructor in order for the root element to have the right namespaces.
// If you need to do custom serialization of inner objects, you can use a shortened constructor.
XmlSerializer xs = new XmlSerializer(typeof(MyTypeWithNamespaces), new XmlAttributeOverrides(),
    new Type[]{}, new XmlRootAttribute("MyTypeWithNamespaces"), "urn:Abracadabra");

******/
XmlSerializer xs = new XmlSerializer(typeof(MyTypeWithNamespaces),
    new XmlRootAttribute("MyTypeWithNamespaces") { Namespace="urn:Abracadabra" });

// I'll use a MemoryStream as my backing store.
MemoryStream ms = new MemoryStream();

// This is extra! If you want to change the settings for the XmlSerializer, you have to create
// a separate XmlWriterSettings object and use the XmlTextWriter.Create(...) factory method.
// So, in this case, I want to omit the XML declaration.
XmlWriterSettings xws = new XmlWriterSettings();
xws.OmitXmlDeclaration = true;
xws.Encoding = Encoding.UTF8; // This is probably the default
// You could use the XmlWriterSetting to set indenting and new line options, but the
// XmlTextWriter class has a much easier method to accomplish that.

// The factory method returns a XmlWriter, not a XmlTextWriter, so cast it.
XmlTextWriter xtw = (XmlTextWriter)XmlTextWriter.Create(ms, xws);
// Then we can set our indenting options (this is, of course, optional).
xtw.Formatting = Formatting.Indented;

// Now serialize our object.
xs.Serialize(xtw, myType, myType.Namespaces);

Once you have done this, you should get the following output:

<MyTypeWithNamespaces>
    <Label xmlns="urn:Whoohoo">myLabel</Label>
    <Epoch>42</Epoch>
</MyTypeWithNamespaces>

I have successfully used this method in a recent project with a deep hierachy of classes that are serialized to XML for web service calls. Microsoft's documentation is not very clear about what to do with the publicly accesible XmlSerializerNamespaces member once you've created it, and so many think it's useless. But by following their documentation and using it in the manner shown above, you can customize how the XmlSerializer generates XML for your classes without resorting to unsupported behavior or "rolling your own" serialization by implementing IXmlSerializable.

It is my hope that this answer will put to rest, once and for all, how to get rid of the standard xsi and xsd namespaces generated by the XmlSerializer.

UPDATE: I just want to make sure I answered the OP's question about removing all namespaces. My code above will work for this; let me show you how. Now, in the example above, you really can't get rid of all namespaces (because there are two namespaces in use). Somewhere in your XML document, you're going to need to have something like xmlns="urn:Abracadabra" xmlns:w="urn:Whoohoo. If the class in the example is part of a larger document, then somewhere above a namespace must be declared for either one of (or both) Abracadbra and Whoohoo. If not, then the element in one or both of the namespaces must be decorated with a prefix of some sort (you can't have two default namespaces, right?). So, for this example, Abracadabra is the default namespace. I could inside my MyTypeWithNamespaces class add a namespace prefix for the Whoohoo namespace like so:

public MyTypeWithNamespaces
{
    this._namespaces = new XmlSerializerNamespaces(new XmlQualifiedName[] {
        new XmlQualifiedName(string.Empty, "urn:Abracadabra"), // Default Namespace
        new XmlQualifiedName("w", "urn:Whoohoo")
    });
}

Now, in my class definition, I indicated that the <Label/> element is in the namespace "urn:Whoohoo", so I don't need to do anything further. When I now serialize the class using my above serialization code unchanged, this is the output:

<MyTypeWithNamespaces xmlns:w="urn:Whoohoo">
    <w:Label>myLabel</w:Label>
    <Epoch>42</Epoch>
</MyTypeWithNamespaces>

Because <Label> is in a different namespace from the rest of the document, it must, in someway, be "decorated" with a namespace. Notice that there are still no xsi and xsd namespaces.

This ends my answer to the other question. But I wanted to make sure I answered the OP's question about using no namespaces, as I feel I didn't really address it yet. Assume that <Label> is part of the same namespace as the rest of the document, in this case urn:Abracadabra:

<MyTypeWithNamespaces>
    <Label>myLabel<Label>
    <Epoch>42</Epoch>
</MyTypeWithNamespaces>

Your constructor would look as it would in my very first code example, along with the public property to retrieve the default namespace:

// As noted below, per Microsoft's documentation, if the class exposes a public
// member of type XmlSerializerNamespaces decorated with the 
// XmlNamespacesDeclarationAttribute, then the XmlSerializer will utilize those
// namespaces during serialization.
public MyTypeWithNamespaces( )
{
    this._namespaces = new XmlSerializerNamespaces(new XmlQualifiedName[] {
        new XmlQualifiedName(string.Empty, "urn:Abracadabra") // Default Namespace
    });
}

[XmlNamespaceDeclarations]
public XmlSerializerNamespaces Namespaces
{
    get { return this._namespaces; }
}
private XmlSerializerNamespaces _namespaces;

Then, later, in your code that uses the MyTypeWithNamespaces object to serialize it, you would call it as I did above:

MyTypeWithNamespaces myType = new MyTypeWithNamespaces("myLabel", 42);

XmlSerializer xs = new XmlSerializer(typeof(MyTypeWithNamespaces),
    new XmlRootAttribute("MyTypeWithNamespaces") { Namespace="urn:Abracadabra" });

...

// Above, you'd setup your XmlTextWriter.

// Now serialize our object.
xs.Serialize(xtw, myType, myType.Namespaces);

And the XmlSerializer would spit back out the same XML as shown immediately above with no additional namespaces in the output:

<MyTypeWithNamespaces>
    <Label>myLabel<Label>
    <Epoch>42</Epoch>
</MyTypeWithNamespaces>

JUnit: how to avoid "no runnable methods" in test utils classes

My specific case has the following scenario. Our tests

public class VenueResourceContainerTest extends BaseTixContainerTest

all extend

BaseTixContainerTest

and JUnit was trying to run BaseTixContainerTest. Poor BaseTixContainerTest was just trying to setup the container, setup the client, order some pizza and relax... man.

As mentioned previously, you can annotate the class with

@Ignore

But that caused JUnit to report that test as skipped (as opposed to completely ignored).

Tests run: 4, Failures: 0, Errors: 0, Skipped: 1

That kind of irritated me.

So I made BaseTixContainerTest abstract, and now JUnit truly ignores it.

Tests run: 3, Failures: 0, Errors: 0, Skipped: 0

Using Notepad++ to validate XML against an XSD

In Notepad++ go to Plugins > Plugin manager > Show Plugin Manager then find Xml Tools plugin. Tick the box and click Install
Open XML document you want to validate and click Ctrl+Shift+Alt+M (Or use Menu if this is your preference Plugins > XML Tools > Validate Now).
Following dialog will open:
Click on .... Point to XSD file and I am pretty sure you'll be able to handle things from here.

Hope this saves you some time.

EDIT: Plugin manager was not included in some versions of Notepad++ because many users didn't like commercials that it used to show. If you want to keep an older version, however still want plugin manager, you can get it on github, and install it by extracting the archive and copying contents to plugins and updates folder.
In version 7.7.1 plugin manager is back under a different guise... Plugin Admin so now you can simply update notepad++ and have it back.

Is it possible in Java to catch two exceptions in the same catch block?

Java <= 6.x just allows you to catch one exception for each catch block:

try {

} catch (ExceptionType name) {

} catch (ExceptionType name) {

}

Documentation:

Each catch block is an exception handler and handles the type of exception indicated by its argument. The argument type, ExceptionType, declares the type of exception that the handler can handle and must be the name of a class that inherits from the Throwable class.

For Java 7 you can have multiple Exception caught on one catch block:

catch (IOException|SQLException ex) {
    logger.log(ex);
    throw ex;
}

Documentation:

In Java SE 7 and later, a single catch block can handle more than one type of exception. This feature can reduce code duplication and lessen the temptation to catch an overly broad exception.

Reference: http://docs.oracle.com/javase/tutorial/essential/exceptions/catch.html

Submit two forms with one button

If you have a regular submit button, you could add an onclick event to it that does the follow:

document.getElementById('otherForm').submit();

Disable vertical sync for glxgears

Disabling the Sync to VBlank checkbox in nvidia-settings (OpenGL Settings tab) does the trick for me.

How to make a browser display a "save as dialog" so the user can save the content of a string to a file on his system?

There is a javascript library for this, see FileSaver.js on Github

However the saveAs() function won't send pure string to the browser, you need to convert it to blob:

function data2blob(data, isBase64) {
  var chars = "";

  if (isBase64)
    chars = atob(data);
  else
    chars = data;

  var bytes = new Array(chars.length);
  for (var i = 0; i < chars.length; i++) {
    bytes[i] = chars.charCodeAt(i);
  }

  var blob = new Blob([new Uint8Array(bytes)]);
  return blob;
}

and then call saveAs on the blob, as like:

var myString = "my string with some stuff";
saveAs( data2blob(myString), "myString.txt" );

Of course remember to include the above-mentioned javascript library on your webpage using <script src=FileSaver.js>

Copying a rsa public key to clipboard

Your command is right, but the error shows that you didn't create your ssh key yet. To generate new ssh key enter the following command into the terminal.

ssh-keygen

After entering the command then you will be asked to enter file name and passphrase. Normally you don't need to change this. Just press enter. Then your key will be generated in ~/.ssh directory. After this, you can copy your key by the following command.

pbcopy < ~/.ssh/id_rsa.pub

cat .ssh/id_rsa.pub | pbcopy

You can find more about this here ssh.

Using current time in UTC as default value in PostgreSQL

Still another solution:

timezone('utc', now())

Creating for loop until list.length

You could learn about Python loops here: http://en.wikibooks.org/wiki/Python_Programming/Loops

You have to know that Python doesn't have { and } for start and end of loop, instead it depends on tab chars you enter in first of line, I mean line indents.

So you can do loop inside loop with double tab (indent)

An example of double loop is like this:

onetoten = range(1,11)
tentotwenty = range(10,21)
for count in onetoten:
    for count2 in tentotwenty
        print(count2)

JAX-RS / Jersey how to customize error handling?

@Provider
public class BadURIExceptionMapper implements ExceptionMapper<NotFoundException> {

public Response toResponse(NotFoundException exception){

    return Response.status(Response.Status.NOT_FOUND).
    entity(new ErrorResponse(exception.getClass().toString(),
                exception.getMessage()) ).
    build();
}
}

Create above class. This will handle 404 (NotFoundException) and here in toResponse method you can give your custom response. Similarly there are ParamException etc. which you would need to map to provide customized responses.

Remove trailing newline from the elements of a string list

If you need to remove just trailing whitespace, you could use str.rstrip(), which should be slightly more efficient than str.strip():

>>> lst = ['this\n', 'is\n', 'a\n', 'list\n', 'of\n', 'words\n']
>>> [x.rstrip() for x in lst]
['this', 'is', 'a', 'list', 'of', 'words']
>>> list(map(str.rstrip, lst))
['this', 'is', 'a', 'list', 'of', 'words']

Java Error: illegal start of expression

Declare

public static int[] locations={1,2,3};

outside of the main method.

mkdir's "-p" option

-p|--parent will be used if you are trying to create a directory with top-down approach. That will create the parent directory then child and so on iff none exists.

-p, --parents no error if existing, make parent directories as needed

About rlidwka it means giving full or administrative access. Found it here https://itservices.stanford.edu/service/afs/intro/permissions/unix.

Xcode stops working after set "xcode-select -switch"

You should be pointing it towards the Developer directory, not the Xcode application bundle. Run this:

sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer

With recent versions of Xcode, you can go to Xcode ? Preferences… ? Locations and pick one of the options for Command Line Tools to set the location.

How to run VBScript from command line without Cscript/Wscript

Why don't you just stash the vbscript in a batch/vbscript file hybrid. Name the batch hybrid Converter.bat and you can execute it directly as Converter from the cmd line. Sure you can default ALL scripts to run from Cscript or Wscript, but if you want to execute your vbs as a windows script rather than a console script, this could cause some confusion later on. So just set your code to a batch file and run it directly.

Check the answer -> Here

And here is an example:

Converter.bat

::' VBS/Batch Hybrid
::' --- Batch portion ---------
rem^ &@echo off
rem^ &call :'sub
rem^ &exit /b

:'sub
rem^ &echo begin batch
rem^ &cscript //nologo //e:vbscript "%~f0"
rem^ &echo end batch
rem^ &exit /b

'----- VBS portion -----
Dim tester
tester = "Convert data here"
Msgbox tester

How to use timeit module

# ????????? ????? ?????

def gen_prime(x):
    multiples = []
    results = []
    for i in range(2, x+1):
        if i not in multiples:
            results.append(i)
            for j in range(i*i, x+1, i):
                multiples.append(j)

    return results


import timeit

# ???????? ?????

start_time = timeit.default_timer()
gen_prime(3000)
print(timeit.default_timer() - start_time)

# start_time = timeit.default_timer()
# gen_prime(1001)
# print(timeit.default_timer() - start_time)

Mac SQLite editor

Base is younger than your question, and definitely feels like a 1.0, but the user experience is miles better than the experience of using any of the "cross-platform" apps on a Mac.

http://menial.co.uk/software/base/

I recommend you buy a license before the developer realizes he is charging too little for it.

UPDATE: Since December 2008, Base is now up to version 2.1, it has become an excellent product. I don't remember what it used to cost, but I paid for the 1.x to 2.x upgrade. Still highly recommended.

ANOTHER UPDATE: Base is available on the Mac App Store, you may find it useful to read the reviews there.

ScriptManager.RegisterStartupScript code not working - why?

Off the top of my head:

Use GetType() instead of typeof(Page) in order to bind the script to your actual page class instead of the base class,
Pass a key constant instead of Page.UniqueID, which is not that meaningful since it's supposed to be used by named controls,
End your Javascript statement with a semicolon,
Register the script during the PreRender phase:

protected void Page_PreRender(object sender, EventArgs e)
{
    ScriptManager.RegisterStartupScript(this, GetType(), "YourUniqueScriptKey", 
        "alert('This pops up');", true);
}

click() event is calling twice in jquery

Make un unbind before the click;

$("#link_button").unbind('click');
$("#link_button")
.button()
.click(function () {
   $("#attachmentForm").slideToggle("fast");
});

docker container ssl certificates

I am trying to do something similar to this. As commented above, I think you would want to build a new image with a custom Dockerfile (using the image you pulled as a base image), ADD your certificate, then RUN update-ca-certificates. This way you will have a consistent state each time you start a container from this new image.

# Dockerfile
FROM some-base-image:0.1
ADD you_certificate.crt:/container/cert/path
RUN update-ca-certificates

Let's say a docker build against that Dockerfile produced IMAGE_ID. On the next docker run -d [any other options] IMAGE_ID, the container started by that command will have your certificate info. Simple and reproducible.

How to remove unwanted space between rows and columns in table?

For standards compliant HTML5 add all this css to remove all space between images in tables:

table { 
    border-spacing: 0;
    border-collapse: collapse;
}
td {
    padding:0px;
}
td img {
    display:block;
}

Select from table by knowing only date without time (ORACLE)

DATE is a reserved keyword in Oracle, so I'm using column-name your_date instead.

If you have an index on your_date, I would use

WHERE your_date >= TO_DATE('2010-08-03', 'YYYY-MM-DD')
  AND your_date <  TO_DATE('2010-08-04', 'YYYY-MM-DD')

or BETWEEN:

WHERE your_date BETWEEN TO_DATE('2010-08-03', 'YYYY-MM-DD')
                    AND TO_DATE('2010-08-03 23:59:59', 'YYYY-MM-DD HH24:MI:SS')

If there is no index or if there are not too many records

WHERE TRUNC(your_date) = TO_DATE('2010-08-03', 'YYYY-MM-DD')

should be sufficient. TRUNC without parameter removes hours, minutes and seconds from a DATE.

If performance really matters, consider putting a Function Based Index on that column:

CREATE INDEX trunc_date_idx ON t1(TRUNC(your_date));

How to Access Hive via Python?

Below python program should work to access hive tables from python:

import commands

cmd = "hive -S -e 'SELECT * FROM db_name.table_name LIMIT 1;' "

status, output = commands.getstatusoutput(cmd)

if status == 0:
   print output
else:
   print "error"

How can I reduce the waiting (ttfb) time

I have met the same problem. My project is running on the local server. I checked my php code.

$db = mysqli_connect('localhost', 'root', 'root', 'smart');

I use localhost to connect to my local database. That maybe the cause of the problem which you're describing. You can modify your HOSTS file. Add the line

127.0.0.1 localhost.

Using Html.ActionLink to call action on different controller

this code worked for me in partial view:

<a href="/Content/[email protected]">@item.Title</a>

cut or awk command to print first field of first row

You can kill the process which is running the container.

With this command you can list the processes related with the docker container:

ps -aux | grep $(docker ps -a | grep container-name | awk '{print $1}')

Now you have the process ids to kill with kill or kill -9.

Horizontal scroll on overflow of table

The solution for those who cannot or do not want to wrap the `table` in a `div` (e.g. if the HTML is generated from Markdown) but still want to have scrollbars:

_x000D_

table {_x000D_
  display: block;_x000D_
  max-width: -moz-fit-content;_x000D_
  max-width: fit-content;_x000D_
  margin: 0 auto;_x000D_
  overflow-x: auto;_x000D_
  white-space: nowrap;_x000D_
}

_x000D_

<table>_x000D_
  <tr>_x000D_
    <td>Especially on mobile, a table can easily become wider than the viewport.</td>_x000D_
    <td>Using the right CSS, you can get scrollbars on the table without wrapping it.</td>_x000D_
  </tr>_x000D_
</table>_x000D_
_x000D_
<table>_x000D_
  <tr>_x000D_
    <td>A centered table.</td>_x000D_
  </tr>_x000D_
</table>

_x000D_

Explanation: display: block; makes it possible to have scrollbars. By default (and unlike tables), blocks span the full width of the parent element. This can be prevented with max-width: fit-content;, which allows you to still horizontally center tables with less content using margin: 0 auto;. white-space: nowrap; is optional (but useful for this demonstration).

Find ALL tweets from a user (not just the first 3,200)

The only way to see more is to start saving them before the user's tweet count hits 3200. Services which show more than 3200 tweets have saved them in their own dbs. There's currently no way to get more than that through any Twitter API.

http://www.quora.com/Is-there-a-way-to-get-more-than-3200-tweets-from-a-twitter-user-using-Twitters-API-or-scraping

https://dev.twitter.com/discussions/276

Note from that second link: "…the 3,200 limit is for browsing the timeline only. Tweets can always be requested by their ID using the GET statuses/show/:id method."

Difference in boto3 between resource, client, and session?

I'll try and explain it as simple as possible. So there is no guarantee of the accuracy of the actual terms.

Session is where to initiate the connectivity to AWS services. E.g. following is default session that uses the default credential profile(e.g. ~/.aws/credentials, or assume your EC2 using IAM instance profile )

sqs = boto3.client('sqs')
s3 = boto3.resource('s3')

Because default session is limit to the profile or instance profile used, sometimes you need to use the custom session to override the default session configuration (e.g. region_name, endpoint_url, etc. ) e.g.

# custom resource session must use boto3.Session to do the override
my_west_session = boto3.Session(region_name = 'us-west-2')
my_east_session = boto3.Session(region_name = 'us-east-1')
backup_s3 = my_west_session.resource('s3')
video_s3 = my_east_session.resource('s3')

# you have two choices of create custom client session. 
backup_s3c = my_west_session.client('s3')
video_s3c = boto3.client("s3", region_name = 'us-east-1')

Resource : This is the high-level service class recommended to be used. This allows you to tied particular AWS resources and passes it along, so you just use this abstraction than worry which target services are pointed to. As you notice from the session part, if you have a custom session, you just pass this abstract object than worrying about all custom regions,etc to pass along. Following is a complicated example E.g.

import boto3 
my_west_session = boto3.Session(region_name = 'us-west-2')
my_east_session = boto3.Session(region_name = 'us-east-1')
backup_s3 = my_west_session.resource("s3")
video_s3 = my_east_session.resource("s3")
backup_bucket = backup_s3.Bucket('backupbucket') 
video_bucket = video_s3.Bucket('videobucket')

# just pass the instantiated bucket object
def list_bucket_contents(bucket):
   for object in bucket.objects.all():
      print(object.key)

list_bucket_contents(backup_bucket)
list_bucket_contents(video_bucket)

Client is a low level class object. For each client call, you need to explicitly specify the targeting resources, the designated service target name must be pass long. You will lose the abstraction ability.

For example, if you only deal with the default session, this looks similar to boto3.resource.

import boto3 
s3 = boto3.client('s3')

def list_bucket_contents(bucket_name):
   for object in s3.list_objects_v2(Bucket=bucket_name) :
      print(object.key)

list_bucket_contents('Mybucket')

However, if you want to list objects from a bucket in different regions, you need to specify the explicit bucket parameter required for the client.

import boto3 
backup_s3 = my_west_session.client('s3',region_name = 'us-west-2')
video_s3 = my_east_session.client('s3',region_name = 'us-east-1')

# you must pass boto3.Session.client and the bucket name 
def list_bucket_contents(s3session, bucket_name):
   response = s3session.list_objects_v2(Bucket=bucket_name)
   if 'Contents' in response:
     for obj in response['Contents']:
        print(obj['key'])

list_bucket_contents(backup_s3, 'backupbucket')
list_bucket_contents(video_s3 , 'videobucket')

git clone: Authentication failed for <URL>

As the other answers suggest, editing/removing credentials in the Manage Windows Credentials work and does the job. However, you need to do this each time when the password changes or credentials do not work for some work. Using ssh key has been extremely useful for me where I don't have to bother about these again once I'm done creating a ssh-key and adding them on the server repository (github/bitbucket/gitlab).

Generating a new ssh-key

Open Git Bash.
Paste the text below, substituting in your repo's email address. $ ssh-keygen -t rsa -b 4096 -C "[email protected]"
When you're prompted to "Enter a file in which to save the key," press Enter. This accepts the default file location.
Then you'll be asked to type a secure passphrase. You can type a passphrase, hit enter and type the passphrase again.

Or, Hit enter twice for empty passphrase.

Copy this on the clipboard:

clip < ~/.ssh/id_rsa.pub

And then add this key into your repo's profile. For e.g, on github->setting->SSH keys -> paste the key that you coppied ad hit add

Ref: https://help.github.com/en/enterprise/2.15/user/articles/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent#generating-a-new-ssh-key

You're done once and for all!

How to Round to the nearest whole number in C#

You need Math.Round, not Math.Ceiling. Ceiling always "rounds" up, while Round rounds up or down depending on the value after the decimal point.

Length of array in function argument

sizeof only works to find the length of the array if you apply it to the original array.

int a[5]; //real array. NOT a pointer
sizeof(a); // :)

However, by the time the array decays into a pointer, sizeof will give the size of the pointer and not of the array.

int a[5];
int * p = a;
sizeof(p); // :(

As you have already smartly pointed out main receives the length of the array as an argument (argc). Yes, this is out of necessity and is not redundant. (Well, it is kind of reduntant since argv is conveniently terminated by a null pointer but I digress)

There is some reasoning as to why this would take place. How could we make things so that a C array also knows its length?

A first idea would be not having arrays decaying into pointers when they are passed to a function and continuing to keep the array length in the type system. The bad thing about this is that you would need to have a separate function for every possible array length and doing so is not a good idea. (Pascal did this and some people think this is one of the reasons it "lost" to C)

A second idea is storing the array length next to the array, just like any modern programming language does:

a -> [5];[0,0,0,0,0]

But then you are just creating an invisible struct behind the scenes and the C philosophy does not approve of this kind of overhead. That said, creating such a struct yourself is often a good idea for some sorts of problems:

struct {
    size_t length;
    int * elements;
}

Another thing you can think about is how strings in C are null terminated instead of storing a length (as in Pascal). To store a length without worrying about limits need a whopping four bytes, an unimaginably expensive amount (at least back then). One could wonder if arrays could be also null terminated like that but then how would you allow the array to store a null?

Get all child views inside LinearLayout at once

It is easier with Kotlin using for-in loop:

for (childView in ll.children) {
     //childView is a child of ll         
}

Here ll is id of LinearLayout defined in layout XML.

Why does the C preprocessor interpret the word "linux" as the constant "1"?

In the Old Days (pre-ANSI), predefining symbols such as unix and vax was a way to allow code to detect at compile time what system it was being compiled for. There was no official language standard back then (beyond the reference material at the back of the first edition of K&R), and C code of any complexity was typically a complex maze of #ifdefs to allow for differences between systems. These macro definitions were generally set by the compiler itself, not defined in a library header file. Since there were no real rules about which identifiers could be used by the implementation and which were reserved for programmers, compiler writers felt free to use simple names like unix and assumed that programmers would simply avoid using those names for their own purposes.

The 1989 ANSI C standard introduced rules restricting what symbols an implementation could legally predefine. A macro predefined by the compiler could only have a name starting with two underscores, or with an underscore followed by an uppercase letter, leaving programmers free to use identifiers not matching that pattern and not used in the standard library.

As a result, any compiler that predefines unix or linux is non-conforming, since it will fail to compile perfectly legal code that uses something like int linux = 5;.

As it happens, gcc is non-conforming by default -- but it can be made to conform (reasonably well) with the right command-line options:

gcc -std=c90 -pedantic ... # or -std=c89 or -ansi
gcc -std=c99 -pedantic
gcc -std=c11 -pedantic

See the gcc manual for more details.

gcc will be phasing out these definitions in future releases, so you shouldn't write code that depends on them. If your program needs to know whether it's being compiled for a Linux target or not it can check whether __linux__ is defined (assuming you're using gcc or a compiler that's compatible with it). See the GNU C preprocessor manual for more information.

A largely irrelevant aside: the "Best One Liner" winner of the 1987 International Obfuscated C Code Contest, by David Korn (yes, the author of the Korn Shell) took advantage of the predefined unix macro:

main() { printf(&unix["\021%six\012\0"],(unix)["have"]+"fun"-0x60);}

It prints "unix", but for reasons that have absolutely nothing to do with the spelling of the macro name.

JavaScript: function returning an object

I would take those directions to mean:

  function makeGamePlayer(name,totalScore,gamesPlayed) {
        //should return an object with three keys:
        // name
        // totalScore
        // gamesPlayed

         var obj = {  //note you don't use = in an object definition
             "name": name,
             "totalScore": totalScore,
             "gamesPlayed": gamesPlayed
          }
         return obj;
    }

jquery <a> tag click event

That's because your hidden fields have duplicate IDs, so jQuery only returns the first in the set. Give them classes instead, like .uid and grab them via:

var uids = $(".uid").map(function() {
    return this.value;
}).get();

Demo: http://jsfiddle.net/karim79/FtcnJ/

EDIT: say your output looks like the following (notice, IDs have changed to classes)

<fieldset><legend>John Smith</legend>
<img src='foo.jpg'/><br>
<a href="#" class="aaf">add as friend</a>
<input name="uid" type="hidden" value='<?php echo $row->uid;?>' class="uid">
</fieldset>

You can target the 'uid' relative to the clicked anchor like this:

$("a.aaf").click(function() {
    alert($(this).next('.uid').val());
});

Important: do not have any duplicate IDs. They will cause problems. They are invalid, bad and you should not do it.

Create a new object from type parameter in generic class

export abstract class formBase<T> extends baseClass {

  protected item = {} as T;
}

Its object will be able to receive any parameter, however, type T is only a typescript reference and can not be created through a constructor. That is, it will not create any class objects.

Javascript date.getYear() returns 111 in 2011?

https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Date/getYear

getYear is no longer used and has been replaced by the getFullYear method.

The getYear method returns the year minus 1900; thus:

For years greater than or equal to 2000, the value returned by getYear is 100 or greater. For example, if the year is 2026, getYear returns 126.

For years between and including 1900 and 1999, the value returned by getYear is between 0 and 99. For example, if the year is 1976, getYear returns 76.

For years less than 1900, the value returned by getYear is less than 0. For example, if the year is 1800, getYear returns -100.

To take into account years before and after 2000, you should use getFullYear instead of getYear so that the year is specified in full.

How to display loading image while actual image is downloading

I use a similar technique to what @Sarfraz posted, except instead of hiding elements, I just manipulate the class of the image that I'm loading.

<style type="text/css">
.loading { background-image: url(loading.gif); }
.loaderror { background-image: url(loaderror.gif); }
</style>
...
<img id="image" class="loading" />
...
<script type="text/javascript">
    var img = new Image();
    img.onload = function() {
        i = document.getElementById('image');
        i.removeAttribute('class');
        i.src = img.src;
    };
    img.onerror = function() {
        document.getElementById('image').setAttribute('class', 'loaderror');
    };
    img.src = 'http://path/to/image.png';
</script>

In my case, sometimes images don't load, so I handle the onerror event to change the image class so it displays an error background image (rather than the browser's broken image icon).

How do I compile a .c file on my Mac?

You will need to install the Apple Developer Tools. Once you have done that, the easiest thing is to either use the Xcode IDE or use gcc, or nowadays better cc (the clang LLVM compiler), from the command line.

According to Apple's site, the latest version of Xcode (3.2.1) only runs on Snow Leopard (10.6) so if you have an earlier version of OS X you will need to use an older version of Xcode. Your Mac should have come with a Developer Tools DVD which will contain a version that should run on your system. Also, the Apple Developer Tools site still has older versions available for download. Xcode 3.1.4 should run on Leopard (10.5).

Spring mvc @PathVariable

suppose you want to write a url to fetch some order, you can say

www.mydomain.com/order/123

where 123 is orderId.

So now the url you will use in spring mvc controller would look like

/order/{orderId}

Now order id can be declared a path variable

@RequestMapping(value = " /order/{orderId}", method=RequestMethod.GET)
public String getOrder(@PathVariable String orderId){
//fetch order
}

if you use url www.mydomain.com/order/123, then orderId variable will be populated by value 123 by spring

Also note that PathVariable differs from requestParam as pathVariable is part of URL. The same url using request param would look like www.mydomain.com/order?orderId=123

API DOC
Spring Official Reference

Import regular CSS file in SCSS file?

~~Looks like this is unimplemented, as of the time of this writing:~~

~~https://github.com/sass/sass/issues/193~~

For libsass (C/C++ implementation), import works for *.css the same way as for *.scss files - just omit the extension:

@import "path/to/file";

This will import path/to/file.css.

See this answer for further details.

See this answer for Ruby implementation (sass gem)

Escape @ character in razor view engine

I tried all the options above and none worked. This is what I did that worked :

@{
    string str = @"[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,3}$";
}

<td>Email</td>
<td>
   <input type="text" id="txtEmail" required name="email" pattern=@str /> 
</td>

I created a string varible and passed all the RegEx pattern code into it, then used the variable in the html, and Razor was cool with it.

How to split a string between letters and digits (or between digits and letters)?

You could try to split on (?<=\D)(?=\d)|(?<=\d)(?=\D), like:

str.split("(?<=\\D)(?=\\d)|(?<=\\d)(?=\\D)");

It matches positions between a number and not-a-number (in any order).

(?<=\D)(?=\d) - matches a position between a non-digit (\D) and a digit (\d)
(?<=\d)(?=\D) - matches a position between a digit and a non-digit.

How to use "svn export" command to get a single file from the repository?

Guessing from your directory name, you are trying to access the repository on the local filesystem. You still need to use URL syntax to access it:

svn export file:///e:/repositories/process/test.txt c:\test.txt

Xcode: failed to get the task for process

I had this issue when trying to debug an App on a device I hadn't used before. Developer profile was correctly set. The device was part of our teams account but wasn't included in my profile.

Simply had to open Organizer -> Select the Device -> Add to Member Center

getting the error: expected identifier or ‘(’ before ‘{’ token

you need to place the opening brace after main , not before it

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int main(void)
{

Get human readable version of file size?

If you're using Django installed you can also try filesizeformat:

from django.template.defaultfilters import filesizeformat
filesizeformat(1073741824)

=>

"1.0 GB"

A network-related or instance-specific error occurred while establishing a connection to SQL Server

Sql Server fire this error when your application don't have enough rights to access the database. there are several reason about this error . To fix this error you should follow the following instruction.

Try to connect sql server from your server using management studio . if you use windows authentication to connect sql server then set your application pool identity to server administrator .
if you use sql server authentication then check you connection string in web.config of your web application and set user id and password of sql server which allows you to log in .
if your database in other server(access remote database) then first of enable remote access of sql server form sql server property from sql server management studio and enable TCP/IP form sql server configuration manager .
after doing all these stuff and you still can't access the database then check firewall of server form where you are trying to access the database and add one rule in firewall to enable port of sql server(by default sql server use 1433 , to check port of sql server you need to check sql server configuration manager network protocol TCP/IP port).
if your sql server is running on named instance then you need to write port number with sql serer name for example 117.312.21.21/nameofsqlserver,1433.
If you are using cloud hosting like amazon aws or microsoft azure then server or instance will running behind cloud firewall so you need to enable 1433 port in cloud firewall if you have default instance or specific port for sql server for named instance.
If you are using amazon RDS or SQL azure then you need to enable port from security group of that instance.
If you are accessing sql server through sql server authentication mode them make sure you enabled "SQL Server and Windows Authentication Mode" sql server instance property.
1. Restart your sql server instance after making any changes in property as some changes will require restart.

if you further face any difficulty then you need to provide more information about your web site and sql server .

Jinja2 shorthand conditional

Alternative way (but it's not python style. It's JS style)

{{ files and 'Update' or 'Continue' }}

Remove all non-"word characters" from a String in Java, leaving accented characters?

At times you do not want to simply remove the characters, but just remove the accents. I came up with the following utility class which I use in my Java REST web projects whenever I need to include a String in an URL:

import java.text.Normalizer;
import java.text.Normalizer.Form;

import org.apache.commons.lang.StringUtils;

/**
 * Utility class for String manipulation.
 * 
 * @author Stefan Haberl
 */
public abstract class TextUtils {
    private static String[] searchList = { "Ä", "ä", "Ö", "ö", "Ü", "ü", "ß" };
    private static String[] replaceList = { "Ae", "ae", "Oe", "oe", "Ue", "ue",
            "sz" };

    /**
     * Normalizes a String by removing all accents to original 127 US-ASCII
     * characters. This method handles German umlauts and "sharp-s" correctly
     * 
     * @param s
     *            The String to normalize
     * @return The normalized String
     */
    public static String normalize(String s) {
        if (s == null)
            return null;

        String n = null;

        n = StringUtils.replaceEachRepeatedly(s, searchList, replaceList);
        n = Normalizer.normalize(n, Form.NFD).replaceAll("[^\\p{ASCII}]", "");

        return n;
    }

    /**
     * Returns a clean representation of a String which might be used safely
     * within an URL. Slugs are a more human friendly form of URL encoding a
     * String.
     * <p>
     * The method first normalizes a String, then converts it to lowercase and
     * removes ASCII characters, which might be problematic in URLs:
     * <ul>
     * <li>all whitespaces
     * <li>dots ('.')
     * <li>(semi-)colons (';' and ':')
     * <li>equals ('=')
     * <li>ampersands ('&')
     * <li>slashes ('/')
     * <li>angle brackets ('<' and '>')
     * </ul>
     * 
     * @param s
     *            The String to slugify
     * @return The slugified String
     * @see #normalize(String)
     */
    public static String slugify(String s) {

        if (s == null)
            return null;

        String n = normalize(s);
        n = StringUtils.lowerCase(n);
        n = n.replaceAll("[\\s.:;&=<>/]", "");

        return n;
    }
}

Being a German speaker I've included proper handling of German umlauts as well - the list should be easy to extend for other languages.

HTH

EDIT: Note that it may be unsafe to include the returned String in an URL. You should at least HTML encode it to prevent XSS attacks.

Set drawable size programmatically

You can create a subclass of the view type, and override the onSizeChanged method.

I wanted to have scaling compound drawables on my text views that didn't require me to mess around with defining bitmap drawables in xml, etc. and did it this way:

public class StatIcon extends TextView {

    private Bitmap mIcon;

    public void setIcon(int drawableId) {
    mIcon = BitmapFactory.decodeResource(RIApplication.appResources,
            drawableId);
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        if ((w > 0) && (mIcon != null))
            this.setCompoundDrawablesWithIntrinsicBounds(
                null,
                new BitmapDrawable(Bitmap.createScaledBitmap(mIcon, w, w,
                        true)), null, null);

        super.onSizeChanged(w, h, oldw, oldh);
    }

}

(Note that I used w twice, not h, as in this case I was putting the icon above the text, and thus the icon shouldn't have the same height as the text view)

This can be applied to background drawables, or anything else you want to resize relative to your view size. onSizeChanged() is called the first time the View is made, so you don't need any special cases for initialising the size.

jQuery: click function exclude children.

I personally would add a click handler to the child element that did nothing but stop the propagation of the click. So it would look something like:

$('.example > div').click(function (e) {
    e.stopPropagation();
});

Measuring the distance between two coordinates in PHP

Try this function out to calculate distance between to points of latitude and longitude

function calculateDistanceBetweenTwoPoints($latitudeOne='', $longitudeOne='', $latitudeTwo='', $longitudeTwo='',$distanceUnit ='',$round=false,$decimalPoints='')
    {
        if (empty($decimalPoints)) 
        {
            $decimalPoints = '3';
        }
        if (empty($distanceUnit)) {
            $distanceUnit = 'KM';
        }
        $distanceUnit = strtolower($distanceUnit);
        $pointDifference = $longitudeOne - $longitudeTwo;
        $toSin = (sin(deg2rad($latitudeOne)) * sin(deg2rad($latitudeTwo))) + (cos(deg2rad($latitudeOne)) * cos(deg2rad($latitudeTwo)) * cos(deg2rad($pointDifference)));
        $toAcos = acos($toSin);
        $toRad2Deg = rad2deg($toAcos);

        $toMiles  =  $toRad2Deg * 60 * 1.1515;
        $toKilometers = $toMiles * 1.609344;
        $toNauticalMiles = $toMiles * 0.8684;
        $toMeters = $toKilometers * 1000;
        $toFeets = $toMiles * 5280;
        $toYards = $toFeets / 3;


              switch (strtoupper($distanceUnit)) 
              {
                  case 'ML'://miles
                         $toMiles  = ($round == true ? round($toMiles) : round($toMiles, $decimalPoints));
                         return $toMiles;
                      break;
                  case 'KM'://Kilometers
                        $toKilometers  = ($round == true ? round($toKilometers) : round($toKilometers, $decimalPoints));
                        return $toKilometers;
                      break;
                  case 'MT'://Meters
                        $toMeters  = ($round == true ? round($toMeters) : round($toMeters, $decimalPoints));
                        return $toMeters;
                      break;
                  case 'FT'://feets
                        $toFeets  = ($round == true ? round($toFeets) : round($toFeets, $decimalPoints));
                        return $toFeets;
                      break;
                  case 'YD'://yards
                        $toYards  = ($round == true ? round($toYards) : round($toYards, $decimalPoints));
                        return $toYards;
                      break;
                  case 'NM'://Nautical miles
                        $toNauticalMiles  = ($round == true ? round($toNauticalMiles) : round($toNauticalMiles, $decimalPoints));
                        return $toNauticalMiles;
                      break;
              }


    }

Then use the fucntion as

echo calculateDistanceBetweenTwoPoints('11.657740','77.766270','11.074820','77.002160','ML',true,5);

Hope it helps

Counting the number of occurences of characters in a string

I think what you are looking for is this:

public class Ques2 {

/**
 * @param args the command line arguments
 */
public static void main(String[] args) throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    String input = br.readLine().toLowerCase();
    StringBuilder result = new StringBuilder();
    char currentCharacter;
    int count;

    for (int i = 0; i < input.length(); i++) {
        currentCharacter = input.charAt(i);
        count = 1;
        while (i < input.length() - 1 && input.charAt(i + 1) == currentCharacter) {
            count++;
            i++;
        }
        result.append(currentCharacter);
        result.append(count);
    }

    System.out.println("" + result);
}

}

Rails: call another controller action from a controller

You can use a redirect to that action :

redirect_to your_controller_action_url

Return a `struct` from a function in C

You can return a structure from a function (or use the = operator) without any problems. It's a well-defined part of the language. The only problem with struct b = a is that you didn't provide a complete type. struct MyObj b = a will work just fine. You can pass structures to functions as well - a structure is exactly the same as any built-in type for purposes of parameter passing, return values, and assignment.

Here's a simple demonstration program that does all three - passes a structure as a parameter, returns a structure from a function, and uses structures in assignment statements:

#include <stdio.h>

struct a {
   int i;
};

struct a f(struct a x)
{
   struct a r = x;
   return r;
}

int main(void)
{
   struct a x = { 12 };
   struct a y = f(x);
   printf("%d\n", y.i);
   return 0;
}

The next example is pretty much exactly the same, but uses the built-in int type for demonstration purposes. The two programs have the same behaviour with respect to pass-by-value for parameter passing, assignment, etc.:

#include <stdio.h>

int f(int x) 
{
  int r = x;
  return r;
}

int main(void)
{
  int x = 12;
  int y = f(x);
  printf("%d\n", y);
  return 0;
}

How to read from a text file using VBScript?

Dim obj : Set obj = CreateObject("Scripting.FileSystemObject")
Dim outFile : Set outFile = obj.CreateTextFile("in.txt")
Dim inFile: Set inFile = obj.OpenTextFile("out.txt")

' Read file
Dim strRetVal : strRetVal = inFile.ReadAll
inFile.Close

' Write file
outFile.write (strRetVal)
outFile.Close

How to create own dynamic type or dynamic object in C#?

dynamic myDynamic = new { PropertyOne = true, PropertyTwo = false};

How can I use if/else in a dictionary comprehension?

You've already got it: A if test else B is a valid Python expression. The only problem with your dict comprehension as shown is that the place for an expression in a dict comprehension must have two expressions, separated by a colon:

{ (some_key if condition else default_key):(something_if_true if condition
          else something_if_false) for key, value in dict_.items() }

The final if clause acts as a filter, which is different from having the conditional expression.

Worth mentioning that you don't need to have an if-else condition for both the key and the value. For example, {(a if condition else b): value for key, value in dict.items()} will work.

segmentation fault : 11

Your array is occupying roughly 8 GB of memory (1,000 x 1,000,000 x sizeof(double) bytes). That might be a factor in your problem. It is a global variable rather than a stack variable, so you may be OK, but you're pushing limits here.

Writing that much data to a file is going to take a while.

You don't check that the file was opened successfully, which could be a source of trouble, too (if it did fail, a segmentation fault is very likely).

You really should introduce some named constants for 1,000 and 1,000,000; what do they represent?

You should also write a function to do the calculation; you could use an inline function in C99 or later (or C++). The repetition in the code is excruciating to behold.

You should also use C99 notation for main(), with the explicit return type (and preferably void for the argument list when you are not using argc or argv):

int main(void)

Out of idle curiosity, I took a copy of your code, changed all occurrences of 1000 to ROWS, all occurrences of 1000000 to COLS, and then created enum { ROWS = 1000, COLS = 10000 }; (thereby reducing the problem size by a factor of 100). I made a few minor changes so it would compile cleanly under my preferred set of compilation options (nothing serious: static in front of the functions, and the main array; file becomes a local to main; error check the fopen(), etc.).

I then created a second copy and created an inline function to do the repeated calculation, (and a second one to do subscript calculations). This means that the monstrous expression is only written out once — which is highly desirable as it ensure consistency.

#include <stdio.h>

#define   lambda   2.0
#define   g        1.0
#define   F0       1.0
#define   h        0.1
#define   e        0.00001

enum { ROWS = 1000, COLS = 10000 };

static double F[ROWS][COLS];

static void Inicio(double D[ROWS][COLS])
{
    for (int i = 399; i < 600; i++) // Magic numbers!!
        D[i][0] = F0;
}

enum { R = ROWS - 1 };

static inline int ko(int k, int n)
{
    int rv = k + n;
    if (rv >= R)
        rv -= R;
    else if (rv < 0)
        rv += R;
    return(rv);
}

static inline void calculate_value(int i, int k, double A[ROWS][COLS])
{
    int ks2 = ko(k, -2);
    int ks1 = ko(k, -1);
    int kp1 = ko(k, +1);
    int kp2 = ko(k, +2);

    A[k][i] = A[k][i-1]
            + e/(h*h*h*h) * g*g * (A[kp2][i-1] - 4.0*A[kp1][i-1] + 6.0*A[k][i-1] - 4.0*A[ks1][i-1] + A[ks2][i-1])
            + 2.0*g*e/(h*h) * (A[kp1][i-1] - 2*A[k][i-1] + A[ks1][i-1])
            + e * A[k][i-1] * (lambda - A[k][i-1] * A[k][i-1]);
}

static void Iteration(double A[ROWS][COLS])
{
    for (int i = 1; i < COLS; i++)
    {
        for (int k = 0; k < R; k++)
            calculate_value(i, k, A);
        A[999][i] = A[0][i];
    }
}

int main(void)
{
    FILE *file = fopen("P2.txt","wt");
    if (file == 0)
        return(1);
    Inicio(F);
    Iteration(F);
    for (int i = 0; i < COLS; i++)
    {
        for (int j = 0; j < ROWS; j++)
        {
            fprintf(file,"%lf \t %.4f \t %lf\n", 1.0*j/10.0, 1.0*i, F[j][i]);
        }
    }
    fclose(file);
    return(0);
}

This program writes to P2.txt instead of P1.txt. I ran both programs and compared the output files; the output was identical. When I ran the programs on a mostly idle machine (MacBook Pro, 2.3 GHz Intel Core i7, 16 GiB 1333 MHz RAM, Mac OS X 10.7.5, GCC 4.7.1), I got reasonably but not wholly consistent timing:

Original   Modified
6.334s      6.367s
6.241s      6.231s
6.315s     10.778s
6.378s      6.320s
6.388s      6.293s
6.285s      6.268s
6.387s     10.954s
6.377s      6.227s
8.888s      6.347s
6.304s      6.286s
6.258s     10.302s
6.975s      6.260s
6.663s      6.847s
6.359s      6.313s
6.344s      6.335s
7.762s      6.533s
6.310s      9.418s
8.972s      6.370s
6.383s      6.357s

However, almost all that time is spent on disk I/O. I reduced the disk I/O to just the very last row of data, so the outer I/O for loop became:

for (int i = COLS - 1; i < COLS; i++)

the timings were vastly reduced and very much more consistent:

Original    Modified
0.168s      0.165s
0.145s      0.165s
0.165s      0.166s
0.164s      0.163s
0.151s      0.151s
0.148s      0.153s
0.152s      0.171s
0.165s      0.165s
0.173s      0.176s
0.171s      0.165s
0.151s      0.169s

The simplification in the code from having the ghastly expression written out just once is very beneficial, it seems to me. I'd certainly far rather have to maintain that program than the original.

Associative arrays in Shell scripts

Shell have no built-in map like data structure, I use raw string to describe items like that:

ARRAY=(
    "item_A|attr1|attr2|attr3"
    "item_B|attr1|attr2|attr3"
    "..."
)

when extract items and its attributes:

for item in "${ARRAY[@]}"
do
    item_name=$(echo "${item}"|awk -F "|" '{print $1}')
    item_attr1=$(echo "${item}"|awk -F "|" '{print $2}')
    item_attr2=$(echo "${item}"|awk -F "|" '{print $3}')

    echo "${item_name}"
    echo "${item_attr1}"
    echo "${item_attr2}"
done

This seems like not clever than other people's answer, but easy to understand for new people to shell.

CSS, Images, JS not loading in IIS

It was windows permission issue i move the folder thats it inherit wrong permissions. When i move to wwwroot folder and add permission to iis user it start working fine.

jQuery - on change input text

Try this,

$('#kat').on('input',function(e){
 alert('Hello')
});

How to receive JSON as an MVC 5 action method parameter

Unfortunately, Dictionary has problems with Model Binding in MVC. Read the full story here. Instead, create a custom model binder to get the Dictionary as a parameter for the controller action.

To solve your requirement, here is the working solution -

First create your ViewModels in following way. PersonModel can have list of RoleModels.

public class PersonModel
{
    public List<RoleModel> Roles { get; set; }
    public string Name { get; set; }
}

public class RoleModel
{
    public string RoleName { get; set;}
    public string Description { get; set;}
}

Then have a index action which will be serving basic index view -

public ActionResult Index()
{
    return View();
}

Index view will be having following JQuery AJAX POST operation -

<script src="~/Scripts/jquery-1.10.2.min.js"></script>
<script>
    $(function () {
        $('#click1').click(function (e) {

            var jsonObject = {
                "Name" : "Rami",
                "Roles": [{ "RoleName": "Admin", "Description" : "Admin Role"}, { "RoleName": "User", "Description" : "User Role"}]
            };

            $.ajax({
                url: "@Url.Action("AddUser")",
                type: "POST",
                data: JSON.stringify(jsonObject),
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                error: function (response) {
                    alert(response.responseText);
            },
                success: function (response) {
                    alert(response);
                }
            });

        });
    });
</script>

<input type="button" value="click1" id="click1" />

Index action posts to AddUser action -

[HttpPost]
public ActionResult AddUser(PersonModel model)
{
    if (model != null)
    {
        return Json("Success");
    }
    else
    {
        return Json("An Error Has occoured");
    }
}

So now when the post happens you can get all the posted data in the model parameter of action.

Update:

For asp.net core, to get JSON data as your action parameter you should add the [FromBody] attribute before your param name in your controller action. Note: if you're using ASP.NET Core 2.1, you can also use the [ApiController] attribute to automatically infer the [FromBody] binding source for your complex action method parameters. (Doc)

enter image description here

How can I return the current action in an ASP.NET MVC view?

I am using ASP.NET MVC 4, and this what worked for me:

ControllerContext.Controller.ValueProvider.GetValue("controller").RawValue
ControllerContext.Controller.ValueProvider.GetValue("action").RawValue

How do I find out if the GPS of an Android device is enabled

Here are the steps:

Step 1: Create services running in background.

Step 2: You require following permission in Manifest file too:

android.permission.ACCESS_FINE_LOCATION

Step 3: Write code:

 final LocationManager manager = (LocationManager)context.getSystemService    (Context.LOCATION_SERVICE );

if ( !manager.isProviderEnabled( LocationManager.GPS_PROVIDER ) )
  Toast.makeText(context, "GPS is disabled!", Toast.LENGTH_LONG).show(); 
else
  Toast.makeText(context, "GPS is enabled!", Toast.LENGTH_LONG).show();

Step 4: Or simply you can check using:

LocationManager manager = (LocationManager) getSystemService(Context.LOCATION_SERVICE );
boolean statusOfGPS = manager.isProviderEnabled(LocationManager.GPS_PROVIDER);

Step 5: Run your services continuously to monitor connection.

Which equals operator (== vs ===) should be used in JavaScript comparisons?

JavaScript has both strict and type–converting comparisons. A strict comparison (e.g., ===) is only true if the operands are of the same type. The more commonly used abstract comparison (e.g. ==) converts the operands to the same Type before making the comparison.

The equality (==) operator converts the operands if they are not of the same type, then applies strict comparison. If either operand is a number or a boolean, the operands are converted to numbers if possible; else if either operand is a string, the string operand is converted to a number if possible. If both operands are objects, then JavaScript compares internal references which are equal when operands refer to the same object in memory.

Syntax:

x == y

Examples:
```
3 == 3     // true
"3" == 3   // true
3 == '3'   // true
```
The identity/strict equality(===) operator returns true if the operands are strictly equal (see above) with no type conversion.

Syntax:

x === y

Examples:

3 === 3 // true

For reference: Comparison operators (Mozilla Developer Network)

PostgreSQL: Modify OWNER on all tables simultaneously in PostgreSQL

Reassign owned didn't work for me as I was wanted to change tables owned by postgres.

I ended up using Alex's method, however I wanted to do this from within psql. The following was sufficient for me.

DO $$
DECLARE
    rec record;
BEGIN
    FOR rec in 
        SELECT *
        FROM pg_tables
        where schemaname = 'public'
LOOP
    EXECUTE 'alter table ' || quote_ident(rec.tablename) || ' owner to new_owner';
    END LOOP;
END
$$;

How to debug a referenced dll (having pdb)

I had the *.pdb files in the same folder and used the options from Arindam, but it still didn't work. Turns out I needed to enable Enable native code debugging which can be found under Project properties > Debug.

Python-equivalent of short-form "if" in C++

While a = 'foo' if True else 'bar' is the more modern way of doing the ternary if statement (python 2.5+), a 1-to-1 equivalent of your version might be:

a = (b == True and "123" or "456" )

... which in python should be shortened to:

a = b is True and "123" or "456"

... or if you simply want to test the truthfulness of b's value in general...

a = b and "123" or "456"

? : can literally be swapped out for and or

How do you declare string constants in C?

If you want a "const string" like your question says, I would really go for the version you stated in your question:

/* first version */
const char *HELLO2 = "Howdy";

Particularly, I would avoid:

/* second version */
const char HELLO2[] = "Howdy";

Reason: The problem with second version is that compiler will make a copy of the entire string "Howdy", PLUS that string is modifiable (so not really const).

On the other hand, first version is a const string accessible by const pointer HELLO2, and there is no way anybody can modify it.

binning data in python with scipy/numpy

It's probably faster and easier to use numpy.digitize():

import numpy
data = numpy.random.random(100)
bins = numpy.linspace(0, 1, 10)
digitized = numpy.digitize(data, bins)
bin_means = [data[digitized == i].mean() for i in range(1, len(bins))]

An alternative to this is to use numpy.histogram():

bin_means = (numpy.histogram(data, bins, weights=data)[0] /
             numpy.histogram(data, bins)[0])

Try for yourself which one is faster... :)

moment.js get current time in milliseconds?

You could subtract the current time stamp from 12 AM of the same day.

Using current timestamp:

moment().valueOf() - moment().startOf('day').valueOf()

Using arbitrary day:

moment(someDate).valueOf() - moment(someDate).startOf('day').valueOf()

Convert List(of object) to List(of string)

If you want more control over how the conversion takes place, you can use ConvertAll:

var stringList = myList.ConvertAll(obj => obj.SomeToStringMethod());

How to use a dot "." to access members of dictionary?

This also works with nested dicts and makes sure that dicts which are appended later behave the same:

class DotDict(dict):

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        # Recursively turn nested dicts into DotDicts
        for key, value in self.items():
            if type(value) is dict:
                self[key] = DotDict(value)

    def __setitem__(self, key, item):
        if type(item) is dict:
            item = DotDict(item)
        super().__setitem__(key, item)

    __setattr__ = __setitem__
    __getattr__ = dict.__getitem__

How to dynamically remove items from ListView on a button click?

As for your last question, here's the problem illustrated with a simple example:

Let's say that your list contains 5 elements: list = [1, 2, 3, 4, 5] and your list of items to remove (i.e. the indices) is indices_to_remove = [0, 2, 4]. In the first iteration of the loop you remove the item at index 0, so your list becomes list = [2, 3, 4, 5]. In the second iteration, you remove the item at index 2, so your list becomes list = [2, 3, 5] (as you can see, this removes the wrong element). Finally, in the third iteration, you try to remove the element at index 4, but the list only contains three elements, so you get an out of bounds exception.

Now that you see what the problem is, hopefully you will be able to come up with a solution. Good luck!

Spark: subtract two DataFrames

I tried subtract, but the result was not consistent. If I run df1.subtract(df2), not all lines of df1 are shown on the result dataframe, probably due distinct cited on the docs.

This solved my problem: df1.exceptAll(df2)

Is it possible to run CUDA on AMD GPUs?

As of 2019_10_10 I have NOT tested it, but there is the "GPU Ocelot" project

http://gpuocelot.gatech.edu/

that according to its advertisement tries to compile CUDA code for a variety of targets, including AMD GPUs.

JSON.Net Self referencing loop detected

JsonConvert.SerializeObject(ObjectName, new JsonSerializerSettings(){ PreserveReferencesHandling = PreserveReferencesHandling.Objects, Formatting = Formatting.Indented });

Hadoop MapReduce: Strange Result when Storing Previous Value in Memory in a Reduce Class (Java)

It is very inefficient to store all values in memory, so the objects are reused and loaded one at a time. See this other SO question for a good explanation. Summary:

[...] when looping through the Iterable value list, each Object instance is re-used, so it only keeps one instance around at a given time.

how can I see what ports mongo is listening on from mongo shell?

Using querySelectorAll to retrieve direct children

I am just doing this without even trying it. Would this work?

myDiv = getElementById("myDiv");
myDiv.querySelectorAll(this.id + " > .foo");

Give it a try, maybe it works maybe not. Apolovies, but I am not on a computer now to try it (responding from my iPhone).

Regex to get string between curly braces

You want to use regex lookahead and lookbehind. This will give you only what is inside the curly braces:

(?<=\{)(.*?)(?=\})

SQL Server : How to test if a string has only digit characters

There is a system function called ISNUMERIC for SQL 2008 and up. An example:

SELECT myCol
FROM mTable
WHERE ISNUMERIC(myCol)<> 1;

I did a couple of quick tests and also looked further into the docs:

ISNUMERIC returns 1 when the input expression evaluates to a valid numeric data type; otherwise it returns 0.

Which means it is fairly predictable for example

-9879210433 would pass but 987921-0433 does not. $9879210433 would pass but 9879210$433 does not.

So using this information you can weed out based on the list of valid currency symbols and + & - characters.

c++ "Incomplete type not allowed" error accessing class reference information (Circular dependency with forward declaration)

If you will place your definitions in this order then the code will be compiled

class Ball;

class Player {
public:
    void doSomething(Ball& ball);
private:
};

class Ball {
public:
    Player& PlayerB;
    float ballPosX = 800;
private:

};

void Player::doSomething(Ball& ball) {
    ball.ballPosX += 10;                   // incomplete type error occurs here.
}

int main()
{
}

The definition of function doSomething requires the complete definition of class Ball because it access its data member.

In your code example module Player.cpp has no access to the definition of class Ball so the compiler issues an error.

Lollipop : draw behind statusBar with its color set to transparent

The Right solution is to Change a property in XML under your Activity tag to below style. It just works

  android:theme="@style/Theme.AppCompat.Light.NoActionBar"

Best C/C++ Network Library

Aggregated List of Libraries

Boost.Asio is really good.
Asio is also available as a stand-alone library.
ACE is also good, a bit more mature and has a couple of books to support it.
C++ Network Library
POCO
Qt
Raknet
ZeroMQ (C++)
nanomsg (C Library)
nng (C Library)
Berkeley Sockets
libevent
Apache APR
yield
Winsock2(Windows only)
wvstreams
zeroc
libcurl
libuv (Cross-platform C library)
SFML's Network Module
C++ Rest SDK (Casablanca)
RCF
Restbed (HTTP Asynchronous Framework)
SedNL
SDL_net
OpenSplice|DDS
facil.io (C, with optional HTTP and Websockets, Linux / BSD / macOS)
GLib Networking
grpc from Google
GameNetworkingSockets from Valve
CYSockets To do easy things in the easiest way

How can I use an http proxy with node.js http.Client?

The 'request' http package seems to have this feature:

https://github.com/mikeal/request

For example, the 'r' request object below uses localproxy to access its requests:

var r = request.defaults({'proxy':'http://localproxy.com'})

http.createServer(function (req, resp) {
  if (req.url === '/doodle.png') {
    r.get('http://google.com/doodle.png').pipe(resp)
  }
})

Unfortunately there are no "global" defaults so that users of libs that use this cannot amend the proxy unless the lib pass through http options...

HTH, Chris

Decimal precision and scale in EF Code First

- FOR EF CORE - with using System.ComponentModel.DataAnnotations;

use [Column(TypeName = "decimal(precision, scale)")]

Precision = Total number of characters used

Scale = Total number after the dot. (easy to get confused)

Example:

public class Blog
{
    public int BlogId { get; set; }
    [Column(TypeName = "varchar(200)")]
    public string Url { get; set; }
    [Column(TypeName = "decimal(5, 2)")]
    public decimal Rating { get; set; }
}

More details here: https://docs.microsoft.com/en-us/ef/core/modeling/relational/data-types

How to fully delete a git repository created with init?

If you really want to remove all of the repository, leaving only the working directory then it should be as simple as this.

rm -rf .git

The usual provisos about rm -rf apply. Make sure you have an up to date backup and are absolutely sure that you're in the right place before running the command. etc., etc.

How do I read and parse an XML file in C#?

Linq to XML.

Also, VB.NET has much better xml parsing support via the compiler than C#. If you have the option and the desire, check it out.

Make an Installation program for C# applications and include .NET Framework installer into the setup

WiX is the way to go for new installers. If WiX alone is too complicated or not flexible enough on the GUI side consider using SharpSetup - it allows you to create installer GUI in WinForms of WPF and has other nice features like translations, autoupdater, built-in prerequisites, improved autocompletion in VS and more.

(Disclaimer: I am the author of SharpSetup.)

Left Join without duplicate rows from left table

Using the DISTINCT flag will remove duplicate rows.

SELECT DISTINCT
C.Content_ID,
C.Content_Title,
M.Media_Id

FROM tbl_Contents C
LEFT JOIN tbl_Media M ON M.Content_Id = C.Content_Id 
ORDER BY C.Content_DatePublished ASC

Android - SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length

I had the same problem but with a listView.... i solved it because i was using a wrong R.id.listView that list View needed to have a value, in my case it was strings that i saved on listView2... so the right code was R.id.listView2

"Expected BEGIN_OBJECT but was STRING at line 1 column 1"

In Retrofit2, When you want to send your parameters in raw you must use Scalars.

first add this in your gradle:

    compile 'com.squareup.retrofit2:retrofit:2.3.0'
    compile 'com.squareup.retrofit2:converter-gson:2.3.0'
    compile 'com.squareup.retrofit2:converter-scalars:2.3.0'

    public interface ApiInterface {

    String URL_BASE = "http://10.157.102.22/rest/";

    @Headers("Content-Type: application/json")
    @POST("login")
    Call<User> getUser(@Body String body);

}

my SampleActivity :

   public class SampleActivity extends AppCompatActivity implements Callback<User> {

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_sample);

        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl(ApiInterface.URL_BASE)
                .addConverterFactory(ScalarsConverterFactory.create())
                .addConverterFactory(GsonConverterFactory.create())
                .build();

        ApiInterface apiInterface = retrofit.create(ApiInterface.class);


        // prepare call in Retrofit 2.0
        try {
            JSONObject paramObject = new JSONObject();
            paramObject.put("email", "[email protected]");
            paramObject.put("pass", "4384984938943");

            Call<User> userCall = apiInterface.getUser(paramObject.toString());
            userCall.enqueue(this);
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }


    @Override
    public void onResponse(Call<User> call, Response<User> response) {
    }

    @Override
    public void onFailure(Call<User> call, Throwable t) {
    }
}

Reference: [How to POST raw whole JSON in the body of a Retrofit request?

UIButton: how to center an image and a text using imageEdgeInsets and titleEdgeInsets?

Using button.titleLabel.frame.size.width works fine only as long the label is short enough not to be truncated. When the label text gets truncated positioning doesn't work though. Taking

CGSize titleSize = [[[button titleLabel] text] sizeWithFont:[[button titleLabel] font]];

works for me even when the label text is truncated.

Get value of a merged cell of an excel from its cell address in vba

Even if it is really discouraged to use merge cells in Excel (use Center Across Selection for instance if needed), the cell that "contains" the value is the one on the top left (at least, that's a way to express it).

Hence, you can get the value of merged cells in range B4:B11 in several ways:

Range("B4").Value
Range("B4:B11").Cells(1).Value
Range("B4:B11").Cells(1,1).Value

You can also note that all the other cells have no value in them. While debugging, you can see that the value is empty.

Also note that Range("B4:B11").Value won't work (raises an execution error number 13 if you try to Debug.Print it) because it returns an array.

Replace a newline in TSQL

The answer posted above/earlier that was reported to replace CHAR(13)CHAR(10) carriage return:

REPLACE(REPLACE(REPLACE(MyField, CHAR(13) + CHAR(10), 'something else'), CHAR(13), 'something else'), CHAR(10), 'something else')

Will never get to the REPLACE(MyField, CHAR(13) + CHAR(10), 'something else') portion of the code and will return the unwanted result of:

'something else''something else'

And NOT the desired result of a single:

'something else'

That would require the REPLACE script to be rewritten as such:

REPLACE(REPLACE(REPLACE(MyField, CHAR(10), 'something else'), CHAR(13), 'something else'), CHAR(13) + CHAR(10), 'something else')

As the flow first tests the 1st/Furthest Left REPLACE statement, then upon failure will continue to test the next REPLACE statement.

Exporting results of a Mysql query to excel?

The quick and dirty way I use to export mysql output to a file is

$ mysql <database_name> --tee=<file_path>

and then use the exported output (which you can find in <file_path>) wherever I want.

Note that this is the only way you have in order to avoid databases running using the secure-file-priv option, which prevents the usage of INTO OUTFILE suggested in the previous answers:

ERROR 1290 (HY000): The MySQL server is running with the --secure-file-priv option so it cannot execute this statement

How to calculate the number of occurrence of a given character in each row of a column of strings?

nchar(as.character(q.data$string)) -nchar( gsub("a", "", q.data$string))
[1] 2 1 0

Notice that I coerce the factor variable to character, before passing to nchar. The regex functions appear to do that internally.

Here's benchmark results (with a scaled up size of the test to 3000 rows)

 q.data<-q.data[rep(1:NROW(q.data), 1000),]
 str(q.data)
'data.frame':   3000 obs. of  3 variables:
 $ number     : int  1 2 3 1 2 3 1 2 3 1 ...
 $ string     : Factor w/ 3 levels "greatgreat","magic",..: 1 2 3 1 2 3 1 2 3 1 ...
 $ number.of.a: int  2 1 0 2 1 0 2 1 0 2 ...

 benchmark( Dason = { q.data$number.of.a <- str_count(as.character(q.data$string), "a") },
 Tim = {resT <- sapply(as.character(q.data$string), function(x, letter = "a"){
                            sum(unlist(strsplit(x, split = "")) == letter) }) }, 

 DWin = {resW <- nchar(as.character(q.data$string)) -nchar( gsub("a", "", q.data$string))},
 Josh = {x <- sapply(regmatches(q.data$string, gregexpr("g",q.data$string )), length)}, replications=100)
#-----------------------
   test replications elapsed  relative user.self sys.self user.child sys.child
1 Dason          100   4.173  9.959427     2.985    1.204          0         0
3  DWin          100   0.419  1.000000     0.417    0.003          0         0
4  Josh          100  18.635 44.474940    17.883    0.827          0         0
2   Tim          100   3.705  8.842482     3.646    0.072          0         0

jQuery: more than one handler for same event

jQuery's .bind() fires in the order it was bound:

When an event reaches an element, all handlers bound to that event type for the element are fired. If there are multiple handlers registered, they will always execute in the order in which they were bound. After all handlers have executed, the event continues along the normal event propagation path.

Source: http://api.jquery.com/bind/

Because jQuery's other functions (ex. .click()) are shortcuts for .bind('click', handler), I would guess that they are also triggered in the order they are bound.

Find by key deep in a nested array

What worked for me was this lazy approach, not algorithmically lazy ;)

if( JSON.stringify(object_name).indexOf("key_name") > -1 ) {
    console.log("Key Found");
}
else{
    console.log("Key not Found");
}

Difference between a SOAP message and a WSDL?

Better analogy than the telephone call: Ordering products via postal mail from a mail-order service. The WSDL document is like the instructions that explain how to create the kind of order forms that the service provider will accept. A SOAP message is like an envelope with a standard design (size, shape, construction) that every post office around the world knows how to handle. You put your order form into such an envelope. The network (e.g. the internet) is the postal service. You put your envelope into the mail. The employees of the postal service do not look inside the envelope. The payload XML is the order form that you have enclosed in the envelope. After the post office delivers the envelope, the web service provider opens the envelope and processes the order form. If you have created and filled out the form correctly, they will mail the product that you ordered back to you.

Twitter Bootstrap Button Text Word Wrap

You can add these style's and it works just as expected.

.btn {
    white-space:normal !important; 
    word-wrap: break-word; 
    word-break: normal;
}

Number of processors/cores in command line

The lscpu(1) command provided by the util-linux project might also be useful:

$ lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                4
On-line CPU(s) list:   0-3
Thread(s) per core:    2
Core(s) per socket:    2
Socket(s):             1
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 58
Model name:            Intel(R) Core(TM) i7-3520M CPU @ 2.90GHz
Stepping:              9
CPU MHz:               3406.253
CPU max MHz:           3600.0000
CPU min MHz:           1200.0000
BogoMIPS:              5787.10
Virtualization:        VT-x
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              4096K
NUMA node0 CPU(s):     0-3

What do 'lazy' and 'greedy' mean in the context of regular expressions?

Greedy Quantifiers are like the IRS/ATO

If it’s there, they’ll take it all.

The IRS matches with this regex: .*

$50,000

This will match everything!

See here for an example: Greedy-example

Non-greedy quantifiers - they take as little as they can

If I ask for a tax refund, the IRS sudden becomes non-greedy, and they use this quantifier:

(.{2,5}?)([0-9]*) against this input: $50,000

The first group is non-needy and only matches $5 – so I get a $5 refund against the $50,000 input. They're non-greedy. They take as little as possible.

See here: Non-greedy-example.

Why bother?

It becomes important if you are trying to match certain parts of an expression. Sometimes you don't want to match everything.

Hopefully that analogy will help you remember!

How to use select/option/NgFor on an array of objects in Angular2

I don't know what things were like in the alpha, but I'm using beta 12 right now and this works fine. If you have an array of objects, create a select like this:

<select [(ngModel)]="simpleValue"> // value is a string or number
    <option *ngFor="let obj of objArray" [value]="obj.value">{{obj.name}}</option>
</select>

If you want to match on the actual object, I'd do it like this:

<select [(ngModel)]="objValue"> // value is an object
    <option *ngFor="let obj of objArray" [ngValue]="obj">{{obj.name}}</option>
</select>

Convert number to varchar in SQL with formatting

Here's an alternative following the last answer

declare @t tinyint,@v tinyint
set @t=23
set @v=232
Select replace(str(@t,4),' ','0'),replace(str(@t,5),' ','0')

This will work on any number and by varying the length of the str() function you can stipulate how many leading zeros you require. Provided of course that your string length is always >= maximum number of digits your number type can hold.

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

This may or may not help you address your problem, OP, but to get the timezone of the current server relative to UTC (UT1, technically), do:

SELECT EXTRACT(TIMEZONE FROM now())/3600.0;

The above works by extracting the UT1-relative offset in minutes, and then converting it to hours using the factor of 3600 secs/hour.

Example:

SET SESSION timezone TO 'Asia/Kabul';
SELECT EXTRACT(TIMEZONE FROM now())/3600.0;
-- output: 4.5 (as of the writing of this post)

(docs).

ArrayBuffer to base64 encoded string

function _arrayBufferToBase64(uarr) {
    var strings = [], chunksize = 0xffff;
    var len = uarr.length;

    for (var i = 0; i * chunksize < len; i++){
        strings.push(String.fromCharCode.apply(null, uarr.subarray(i * chunksize, (i + 1) * chunksize)));
    }

    return strings.join("");
}

This is better, if you use JSZip for unpack archive from string

How to create a jQuery function (a new jQuery method or plugin)?

Simplest example to making any function in jQuery is

jQuery.fn.extend({
    exists: function() { return this.length }
});

if($(selector).exists()){/*do something here*/}

How to kill a running SELECT statement

Oh! just read comments in question, dear I missed it. but just letting the answer be here in case it can be useful to some other person

I tried "Ctrl+C" and "Ctrl+ Break" none worked. I was using SQL Plus that came with Oracle Client 10.2.0.1.0. SQL Plus is used by most as client for connecting with Oracle DB. I used the Cancel, option under File menu and it stopped the execution!

File Menu, Oracle SQL*Plus

Once you click File wait for few mins then the select command halts and menu appears click on Cancel.

How to center a button within a div?

Margin: 0 auto; is the correct answer for horizontal centering only. For centering both ways something like this will work, using jquery:

var cenBtn = function() {
   var W = $(window).width();
   var H = $(window).height();
   var BtnW = insert button width;
   var BtnH = insert button height;
   var LeftOff = (W / 2) - (BtnW / 2);
   var TopOff = (H / 2) - (BtnH /2);
       $("#buttonID").css({left: LeftOff, top: TopOff});
};

$(window).bind("load, resize", cenBtn);

Update ... five years later, one could use flexbox on the parent DIV element to easily center the button both horizontally and vertically.

Including all browser prefixes, for best support

div {
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  -webkit-box-align : center;
  -moz-box-align    : center;
  -ms-flex-align    : center;
  -webkit-align-items : center;
  align-items : center ;
  justify-content : center;
  -webkit-justify-content : center;
  -webkit-box-pack : center;
  -moz-box-pack : center;
  -ms-flex-pack : center;
}

_x000D_

#container {_x000D_
  position: relative;_x000D_
  margin: 20px;_x000D_
  background: red;_x000D_
  height: 300px;_x000D_
  width: 400px;_x000D_
}_x000D_
_x000D_
#container div {_x000D_
  display: -webkit-box;_x000D_
  display: -moz-box;_x000D_
  display: -ms-flexbox;_x000D_
  display: -webkit-flex;_x000D_
  display: flex;_x000D_
  -webkit-box-align: center;_x000D_
  -moz-box-align: center;_x000D_
  -ms-flex-align: center;_x000D_
  -webkit-align-items: center;_x000D_
  align-items: center;_x000D_
  justify-content: center;_x000D_
  -webkit-box-pack: center;_x000D_
  -moz-box-pack: center;_x000D_
  -ms-flex-pack: center;_x000D_
  -webkit-justify-content: center;_x000D_
  justify-content: center;_x000D_
}

_x000D_

<!-- using a container to make the 100% width and height mean something -->_x000D_
<div id="container"> _x000D_
  <div style="width:100%; height:100%">_x000D_
    <button type="button">hello</button>_x000D_
  </div>_x000D_
</div>

_x000D_

Angular redirect to login page

Please, do not override Router Outlet! It's a nightmare with latest router release (3.0 beta).

Instead use the interfaces CanActivate and CanDeactivate and set the class as canActivate / canDeactivate in your route definition.

Like that:

{ path: '', component: Component, canActivate: [AuthGuard] },

Class:

@Injectable()
export class AuthGuard implements CanActivate {

    constructor(protected router: Router, protected authService: AuthService)
    {

    }

    canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean> | boolean {

        if (state.url !== '/login' && !this.authService.isAuthenticated()) {
            this.router.navigate(['/login']);
            return false;
        }

        return true;
    }
}

How to navigate to a section of a page

Main page

<a href="/sample.htm#page1">page1</a>
<a href="/sample.htm#page2">page2</a>

sample pages

<div id='page1'><a name="page1"></a></div>
<div id='page2'><a name="page2"></a></div>

How do I order my SQLITE database in descending order, for an android app?

This a terrible thing! It costs my a few hours! this is my table rows :

private String USER_ID = "user_id";
private String REMEMBER_UN = "remember_un";
private String REMEMBER_PWD = "remember_pwd";
private String HEAD_URL = "head_url";
private String USER_NAME = "user_name";
private String USER_PPU = "user_ppu";
private String CURRENT_TIME = "current_time";

Cursor c = db.rawQuery("SELECT * FROM " + TABLE +" ORDER BY " + CURRENT_TIME + " DESC",null);

Every time when I update the table , I will update the CURRENT_TIME for sort. But I found that it is not work.The result is not sorted what I want. Finally, I found that, the column "current_time" is the default row of sqlite.

The solution is, rename the column "cur_time" instead of "current_time".

How to assign text size in sp value using java code

This is code for the convert PX to SP format. 100% Works

view.setTextSize(TypedValue.COMPLEX_UNIT_PX, 24);

How to generate range of numbers from 0 to n in ES2015 only?

const keys = Array(n).keys();
[...Array.from(keys)].forEach(callback);

in Typescript

Spring Data: "delete by" is supported?

Be carefull when you use derived query for batch delete. It isn't what you expect: DeleteExecution

Extract a page from a pdf as a jpeg

The pdf2image library can be used.

You can install it simply using,

pip install pdf2image

Once installed you can use following code to get images.

from pdf2image import convert_from_path
pages = convert_from_path('pdf_file', 500)

Saving pages in jpeg format

for page in pages:
    page.save('out.jpg', 'JPEG')

Edit: the Github repo pdf2image also mentions that it uses pdftoppm and that it requires other installations:

pdftoppm is the piece of software that does the actual magic. It is distributed as part of a greater package called poppler. Windows users will have to install poppler for Windows. Mac users will have to install poppler for Mac. Linux users will have pdftoppm pre-installed with the distro (Tested on Ubuntu and Archlinux) if it's not, run sudo apt install poppler-utils.

You can install the latest version under Windows using anaconda by doing:

conda install -c conda-forge poppler

note: Windows versions upto 0.67 are available at http://blog.alivate.com.au/poppler-windows/ but note that 0.68 was released in Aug 2018 so you'll not be getting the latest features or bug fixes.

Style input element to fill remaining width of its container

If you're using Bootstrap 4:

<form class="d-flex">
  <label for="myInput" class="align-items-center">Sample label</label>
  <input type="text" id="myInput" placeholder="Sample Input" class="flex-grow-1"/>
</form>

Better yet, use what's built into Bootstrap:

  <form>
    <div class="input-group">
      <div class="input-group-prepend">
        <label for="myInput" class="input-group-text">Default</label>
      </div>
      <input type="text" class="form-control" id="myInput">
    </div>
  </form>

https://jsfiddle.net/nap1ykbr/

Axios having CORS issue

May help to someone:

I'm sending data from react application to golang server.

Once I change this, w.Header().Set("Access-Control-Allow-Origin", "*"). Error has fixed.

React form submit function:

async handleSubmit(e) {
    e.preventDefault();

    const headers = {
        'Content-Type': 'text/plain'
    };

    await axios.post(
        'http://localhost:3001/login',
        {
            user_name: this.state.user_name,
            password: this.state.password,
        },
        {headers}
        ).then(response => {
            console.log("Success ========>", response);
        })
        .catch(error => {
            console.log("Error ========>", error);
        }
    )
}

Go server got Router,

func main()  {
    router := mux.NewRouter()

    router.HandleFunc("/login", Login.Login).Methods("POST")

    log.Fatal(http.ListenAndServe(":3001", router))
}

Login.go,

func Login(w http.ResponseWriter, r *http.Request)  {

    var user = Models.User{}
    data, err := ioutil.ReadAll(r.Body)

    if err == nil {
        err := json.Unmarshal(data, &user)
        if err == nil {
            user = Postgres.GetUser(user.UserName, user.Password)
            w.Header().Set("Access-Control-Allow-Origin", "*")
            json.NewEncoder(w).Encode(user)
        }
    }
}

How can I clear the Scanner buffer in Java?

Other people have suggested using in.nextLine() to clear the buffer, which works for single-line input. As comments point out, however, sometimes System.in input can be multi-line.

You can instead create a new Scanner object where you want to clear the buffer if you are using System.in and not some other InputStream.

in = new Scanner(System.in);

If you do this, don't call in.close() first. Doing so will close System.in, and so you will get NoSuchElementExceptions on subsequent calls to in.nextInt(); System.in probably shouldn't be closed during your program.

(The above approach is specific to System.in. It might not be appropriate for other input streams.)

If you really need to close your Scanner object before creating a new one, this StackOverflow answer suggests creating an InputStream wrapper for System.in that has its own close() method that doesn't close the wrapped System.in stream. This is overkill for simple programs, though.

How do I stretch a background image to cover the entire HTML element?

You cannot in pure CSS. Having an image covering the whole page behind all other components is probably your best bet (looks like that's the solution given above). Anyway, chances are it will look awful anyway. I would try either an image big enough to cover most screen resolutions (say up to 1600x1200, above it is scarcer), to limit the width of the page, or just to use an image that tile.

Trying to Validate URL Using JavaScript

Here's a regular expression which might fit the bill (it's very long):

/^(?:\u0066\u0069\u006C\u0065\u003A\u002F{2}(?:\u002F{2}(?:(?:[\u0041-\u005A\u0061-\u007A\u0030-\u0039\u002D\u002E\u005F\u007E\u0021\u0024\u0026\u0027\u0028\u0029\u002A\u002B\u002C\u003B\u003D]|\u0025[\u0030-\u0039\u0041-\u0046\u0061-\u0066][\u0030-\u0039\u0041-\u0046\u0061-\u0066])*\u0040)?(?:\u005B(?:(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A){6}(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}|(?:(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035])\u002E){3}(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035]))|\u003A{2}(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A){5}(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}|(?:(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035])\u002E){3}(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035]))|(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4})?\u003A{2}(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A){4}(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}|(?:(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035])\u002E){3}(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035]))|(?:(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A)?[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4})?\u003A{2}(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A){3}(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}|(?:(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035])\u002E){3}(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035]))|(?:(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A){0,2}[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4})?\u003A{2}(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A){2}(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}|(?:(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035])\u002E){3}(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035]))|(?:(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A){0,3}[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4})?\u003A{2}[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}|(?:(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035])\u002E){3}(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035]))|(?:(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A){0,4}[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4})?\u003A{2}(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}|(?:(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035])\u002E){3}(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035]))|(?:(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A){0,5}[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4})?\u003A{2}[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}|(?:(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A){0,6}[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4})?\u003A{2})\u005D|(?:(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035])\u002E){3}(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035])|(?:[\u0041-\u005A\u0061-\u007A\u0030-\u0039](?:(?:[\u0041-\u005A\u0061-\u007A\u0030-\u0039\u002D]+)?[\u0041-\u005A\u0061-\u007A\u0030-\u0039])?|(?:[\u0041-\u005A\u0061-\u007A\u0030-\u0039](?:(?:[\u0041-\u005A\u0061-\u007A\u0030-\u0039\u002D]+)?[\u0041-\u005A\u0061-\u007A\u0030-\u0039])?\u002E)+[\u0041-\u005A\u0061-\u007A\u0030-\u0039](?:(?:[\u0041-\u005A\u0061-\u007A\u0030-\u0039\u002D]+)?[\u0041-\u005A\u0061-\u007A\u0030-\u0039])?))(?:\u003A(?:\u0030-\u0035\u0030-\u0039{0,4}|\u0036\u0030-\u0034\u0030-\u0039{3}|\u0036\u0035\u0030-\u0034\u0030-\u0039{2}|\u0036\u0035\u0035\u0030-\u0032\u0030-\u0039|\u0036\u0035\u0035\u0033\u0030-\u0035))?(?:\u002F(?:[\u0041-\u005A\u0061-\u007A\u0030-\u0039\u002D\u002E\u005F\u007E\u0021\u0024\u0026\u0027\u0028\u0029\u002A\u002B\u002C\u003B\u003D\u003A\u0040]|\u0025[\u0030-\u0039\u0041-\u0046\u0061-\u0066][\u0030-\u0039\u0041-\u0046\u0061-\u0066])*)*|\u002F(?:(?:[\u0041-\u005A\u0061-\u007A\u0030-\u0039\u002D\u002E\u005F\u007E\u0021\u0024\u0026\u0027\u0028\u0029\u002A\u002B\u002C\u003B\u003D\u003A\u0040]|\u0025[\u0030-\u0039\u0041-\u0046\u0061-\u0066][\u0030-\u0039\u0041-\u0046\u0061-\u0066])+(?:\u002F(?:[\u0041-\u005A\u0061-\u007A\u0030-\u0039\u002D\u002E\u005F\u007E\u0021\u0024\u0026\u0027\u0028\u0029\u002A\u002B\u002C\u003B\u003D\u003A\u0040]|\u0025[\u0030-\u0039\u0041-\u0046\u0061-\u0066][\u0030-\u0039\u0041-\u0046\u0061-\u0066])*)*)?|(?:[\u0041-\u005A\u0061-\u007A\u0030-\u0039\u002D\u002E\u005F\u007E\u0021\u0024\u0026\u0027\u0028\u0029\u002A\u002B\u002C\u003B\u003D\u003A\u0040]|\u0025[\u0030-\u0039\u0041-\u0046\u0061-\u0066][\u0030-\u0039\u0041-\u0046\u0061-\u0066])+(?:\u002F(?:[\u0041-\u005A\u0061-\u007A\u0030-\u0039\u002D\u002E\u005F\u007E\u0021\u0024\u0026\u0027\u0028\u0029\u002A\u002B\u002C\u003B\u003D\u003A\u0040]|\u0025[\u0030-\u0039\u0041-\u0046\u0061-\u0066][\u0030-\u0039\u0041-\u0046\u0061-\u0066])*)*)|[\u0041-\u005A\u0061-\u007A][\u0041-\u005A\u0061-\u007A\u0030-\u0039\u002B\u002D\u002E]*\u003A(?:\u002F{2}(?:(?:[\u0041-\u005A\u0061-\u007A\u0030-\u0039\u002D\u002E\u005F\u007E\u0021\u0024\u0026\u0027\u0028\u0029\u002A\u002B\u002C\u003B\u003D]|\u0025[\u0030-\u0039\u0041-\u0046\u0061-\u0066][\u0030-\u0039\u0041-\u0046\u0061-\u0066])*\u0040)?(?:\u005B(?:(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A){6}(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}|(?:(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035])\u002E){3}(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035]))|\u003A{2}(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A){5}(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}|(?:(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035])\u002E){3}(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035]))|(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4})?\u003A{2}(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A){4}(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}|(?:(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035])\u002E){3}(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035]))|(?:(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A)?[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4})?\u003A{2}(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A){3}(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}|(?:(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035])\u002E){3}(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035]))|(?:(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A){0,2}[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4})?\u003A{2}(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A){2}(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}|(?:(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035])\u002E){3}(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035]))|(?:(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A){0,3}[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4})?\u003A{2}[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}|(?:(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035])\u002E){3}(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035]))|(?:(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A){0,4}[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4})?\u003A{2}(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}|(?:(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035])\u002E){3}(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035]))|(?:(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A){0,5}[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4})?\u003A{2}[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}|(?:(?:[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4}\u003A){0,6}[\u0030-\u0039\u0041-\u0046\u0061-\u0066]{1,4})?\u003A{2})\u005D|(?:(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035])\u002E){3}(?:[\u0030-\u0039]|[\u0031-\u0039][\u0030-\u0039]|\u0031[\u0030-\u0039]{2}|\u0032[\u0030-\u0034][\u0030-\u0039]|\u0032\u0035[\u0030-\u0035])|(?:[\u0041-\u005A\u0061-\u007A\u0030-\u0039](?:(?:[\u0041-\u005A\u0061-\u007A\u0030-\u0039\u002D]+)?[\u0041-\u005A\u0061-\u007A\u0030-\u0039])?|(?:[\u0041-\u005A\u0061-\u007A\u0030-\u0039](?:(?:[\u0041-\u005A\u0061-\u007A\u0030-\u0039\u002D]+)?[\u0041-\u005A\u0061-\u007A\u0030-\u0039])?\u002E)+[\u0041-\u005A\u0061-\u007A\u0030-\u0039](?:(?:[\u0041-\u005A\u0061-\u007A\u0030-\u0039\u002D]+)?[\u0041-\u005A\u0061-\u007A\u0030-\u0039])?))(?:\u003A(?:\u0030-\u0035\u0030-\u0039{0,4}|\u0036\u0030-\u0034\u0030-\u0039{3}|\u0036\u0035\u0030-\u0034\u0030-\u0039{2}|\u0036\u0035\u0035\u0030-\u0032\u0030-\u0039|\u0036\u0035\u0035\u0033\u0030-\u0035))?(?:\u002F(?:[\u0041-\u005A\u0061-\u007A\u0030-\u0039\u002D\u002E\u005F\u007E\u0021\u0024\u0026\u0027\u0028\u0029\u002A\u002B\u002C\u003B\u003D\u003A\u0040]|\u0025[\u0030-\u0039\u0041-\u0046\u0061-\u0066][\u0030-\u0039\u0041-\u0046\u0061-\u0066])*)*|\u002F(?:(?:[\u0041-\u005A\u0061-\u007A\u0030-\u0039\u002D\u002E\u005F\u007E\u0021\u0024\u0026\u0027\u0028\u0029\u002A\u002B\u002C\u003B\u003D\u003A\u0040]|\u0025[\u0030-\u0039\u0041-\u0046\u0061-\u0066][\u0030-\u0039\u0041-\u0046\u0061-\u0066])+(?:\u002F(?:[\u0041-\u005A\u0061-\u007A\u0030-\u0039\u002D\u002E\u005F\u007E\u0021\u0024\u0026\u0027\u0028\u0029\u002A\u002B\u002C\u003B\u003D\u003A\u0040]|\u0025[\u0030-\u0039\u0041-\u0046\u0061-\u0066][\u0030-\u0039\u0041-\u0046\u0061-\u0066])*)*)?|(?:[\u0041-\u005A\u0061-\u007A\u0030-\u0039\u002D\u002E\u005F\u007E\u0021\u0024\u0026\u0027\u0028\u0029\u002A\u002B\u002C\u003B\u003D\u003A\u0040]|\u0025[\u0030-\u0039\u0041-\u0046\u0061-\u0066][\u0030-\u0039\u0041-\u0046\u0061-\u0066])+(?:\u002F(?:[\u0041-\u005A\u0061-\u007A\u0030-\u0039\u002D\u002E\u005F\u007E\u0021\u0024\u0026\u0027\u0028\u0029\u002A\u002B\u002C\u003B\u003D\u003A\u0040]|\u0025[\u0030-\u0039\u0041-\u0046\u0061-\u0066][\u0030-\u0039\u0041-\u0046\u0061-\u0066])*)*)(?:\u003F(?:[\u0041-\u005A\u0061-\u007A\u0030-\u0039\u002D\u002E\u005F\u007E\u0021\u0024\u0026\u0027\u0028\u0029\u002A\u002B\u002C\u003B\u003D\u003A\u0040\u002F\u003F]|\u0025[\u0030-\u0039\u0041-\u0046\u0061-\u0066][\u0030-\u0039\u0041-\u0046\u0061-\u0066])*)?(?:\u0023(?:[\u0041-\u005A\u0061-\u007A\u0030-\u0039\u002D\u002E\u005F\u007E\u0021\u0024\u0026\u0027\u0028\u0029\u002A\u002B\u002C\u003B\u003D\u003A\u0040\u002F\u003F]|\u0025[\u0030-\u0039\u0041-\u0046\u0061-\u0066][\u0030-\u0039\u0041-\u0046\u0061-\u0066])*)?)$/

There are some caveats to its usage, namely it does not validate URIs which contain additional information after the user name (e.g. "username:password"). Also, only IPv6 addresses can be contained within the IP literal syntax and the "IPvFuture" syntax is currently ignored and will not validate against this regular expression. Port numbers are also constrained to be between 0 and 65,535. Also, only the file scheme can use triple slashes (e.g. "file:///etc/sysconfig") and can ignore both the query and fragment parts of a URI. Finally, it is geared towards regular URIs and not IRIs, hence the extensive focus on the ASCII character set.

This regular expression could be expanded upon, but it's already complex and long enough as it is. I also cannot guarantee it's going to be "100% accurate" or "bug free", but it should correctly validate URIs for all schemes.

You will need to do additional verification for any scheme-specific requirements or do URI normalization as this regular expression will validate a very broad range of URIs.

Difference between array_push() and $array[] =

explain: 1.the first one declare the variable in array.

2.the second array_push method is used to push the string in the array variable.

3.finally it will print the result.

4.the second method is directly store the string in the array.

5.the data is printed in the array values in using print_r method.

this two are same

Is it possible to make Font Awesome icons larger than 'fa-5x'?

Just add the font awesome class like this:
```
class="fa fa-plus-circle fa-3x"
```
(You can increase the size as per 5x, 7x, 9x..)
You can also add custom CSS.

Method Call Chaining; returning a pointer vs a reference?

The difference between pointers and references is quite simple: a pointer can be null, a reference can not.

Examine your API, if it makes sense for null to be able to be returned, possibly to indicate an error, use a pointer, otherwise use a reference. If you do use a pointer, you should add checks to see if it's null (and such checks may slow down your code).

Here it looks like references are more appropriate.

Is there a MySQL option/feature to track history of changes to records?

Just my 2 cents. I would create a solution which records exactly what changed, very similar to transient's solution.

My ChangesTable would simple be:

1) When an entire row is changed in the main table, lots of entries will go into this table, BUT that is very unlikely, so not a big problem (people are usually only changing one thing) 2) OldVaue (and NewValue if you want) have to be some sort of epic "anytype" since it could be any data, there might be a way to do this with RAW types or just using JSON strings to convert in and out.

Minimum data usage, stores everything you need and can be used for all tables at once. I'm researching this myself right now, but this might end up being the way I go.

For Create and Delete, just the row ID, no fields needed. On delete a flag on the main table (active?) would be good.

XSD - how to allow elements in any order any number of times?

In the schema you have in your question, child1 or child2 can appear in any order, any number of times. So this sounds like what you are looking for.

Edit: if you wanted only one of them to appear an unlimited number of times, the unbounded would have to go on the elements instead:

Edit: Fixed type in XML.

Edit: Capitalised O in maxOccurs

<xs:element name="foo">
   <xs:complexType>
     <xs:choice maxOccurs="unbounded">
       <xs:element name="child1" type="xs:int" maxOccurs="unbounded"/>
       <xs:element name="child2" type="xs:string" maxOccurs="unbounded"/>
     </xs:choice>
   </xs:complexType>
</xs:element>

react-native :app:installDebug FAILED

I couldn't get it to work with a hardware device. I kept getting the same error, but...

For your emulator you have to choose the IntelX86 Atom System image. Then ADB will connect to your emulator and it will properly install the installDebug.apk.

This is what I had to do.

Also look at this tutorial. It helped me immensely.

https://www.youtube.com/watch?v=cnqyUnASuk8

C# : Out of Memory exception

As .Net progresses, so does their ability to add new 32-bit configurations that trips everyone up it seems.

If you are on .Net Framework 4.7.2 do the following:

Go to Project Properties

Build

Uncheck 'prefer 32-bit'

Cheers!

START_STICKY and START_NOT_STICKY

START_STICKY: It will restart the service in case if it terminated and the Intent data which is passed to the onStartCommand() method is NULL. This is suitable for the service which are not executing commands but running independently and waiting for the job.
START_NOT_STICKY: It will not restart the service and it is useful for the services which will run periodically. The service will restart only when there are a pending startService() calls. It’s the best option to avoid running a service in case if it is not necessary.
START_REDELIVER_INTENT: It’s same as STAR_STICKY and it recreates the service, call onStartCommand() with last intent that was delivered to the service.

HTML select drop-down with an input field

You can use input text with "list" attribute, which refers to the datalist of values.

_x000D_

<input type="text" name="city" list="cityname">_x000D_
    <datalist id="cityname">_x000D_
      <option value="Boston">_x000D_
      <option value="Cambridge">_x000D_
    </datalist>

_x000D_

This creates a free text input field that also has a drop-down to select predefined choices. Attribution for example and more information: https://www.w3.org/wiki/HTML/Elements/datalist

How can I write output from a unit test?

Trace.WriteLine should work provided you select the correct output (the dropdown labeled with "Show output from" found in the Output window).

How to Generate a random number of fixed length using JavaScript?

You can use the below code to generate a random number that will always be 6 digits:

Math.random().toString().substr(2, 6)

Hope this works for everyone :)

Briefly how this works is Math.random() generates a random number between 0 and 1 which we convert to a string and using .toString() and take a 6 digit sample from said string using .substr() with the parameters 2, 6 to start the sample from the 2nd char and continue it for 6 characters.

This can be used for any length number.

If you want to do more reading on this here are some links to the docs to save you some googling:

Math.random(): https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/random

.toString(): https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/toString

.substr(): https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/substr

How to get PID by process name?

Since Python 3.5, subprocess.run() is recommended over subprocess.check_output():

>>> int(subprocess.run(["pidof", "-s", "your_process"], stdout=subprocess.PIPE).stdout)

Also, since Python 3.7, you can use the capture_output=true parameter to capture stdout and stderr:

>>> int(subprocess.run(["pidof", "-s", "your process"], capture_output=True).stdout)

Converting char* to float or double

printf("price: %d, %f",temp,ftemp); 
              ^^^

This is your problem. Since the arguments are type double and float, you should be using %f for both (since printf is a variadic function, ftemp will be promoted to double).

%d expects the corresponding argument to be type int, not double.

Variadic functions like printf don't really know the types of the arguments in the variable argument list; you have to tell it with the conversion specifier. Since you told printf that the first argument is supposed to be an int, printf will take the next sizeof (int) bytes from the argument list and interpret it as an integer value; hence the first garbage number.

Now, it's almost guaranteed that sizeof (int) < sizeof (double), so when printf takes the next sizeof (double) bytes from the argument list, it's probably starting with the middle byte of temp, rather than the first byte of ftemp; hence the second garbage number.

Use %f for both.

Text to speech(TTS)-Android

// variable declaration
TextToSpeech tts;

// TextToSpeech initialization, must go within the onCreate method
tts = new TextToSpeech(getActivity(), new TextToSpeech.OnInitListener() {
 @Override
 public void onInit(int i) {
  if (i == TextToSpeech.SUCCESS) {
   int result = tts.setLanguage(Locale.US);
   if (result == TextToSpeech.LANG_MISSING_DATA ||
    result == TextToSpeech.LANG_NOT_SUPPORTED) {
    Log.e("TTS", "Lenguage not supported");
   }
  } else {
   Log.e("TTS", "Initialization failed");
  }
 }
});

// method call
public void buttonSpeak().setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View view) {
  speak();
 }
});
}

private void speak() {
 tts.speak("Text to Speech Test", TextToSpeech.QUEUE_ADD, null);
}

@Override
public void onDestroy() {
 if (tts != null) {
  tts.stop();
  tts.shutdown();
 }
 super.onDestroy();
}

taken from: Text to Speech Youtube Tutorial

How to log as much information as possible for a Java Exception?

It should be quite simple if you are using LogBack or SLF4J. I do it as below

//imports
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

//Initialize logger
Logger logger = LoggerFactory.getLogger(<classname>.class);
try {
   //try something
} catch(Exception e){
   //Actual logging of error
   logger.error("some message", e);
}

Send Message in C#

It doesn't sound like a good idea to use send message. I think you should try to work around the problem that the DLLs can't reference each other...

How to use pip with python 3.4 on windows?

Usage of `pip` for installation of packages in Python 3

Step 1: Install Python 3. Yes, by default an application file pip3.exe is already located there in the path (E.g.):

C:/Users/name/AppData/Local/Programs/Python/Python36-32/Scripts

Step 2: Go to

>Control Panel (Local Machine) > System > Advanced system settings >

>Click on `Environment Variables` >
Set a New User Variable, for this click `New` >
Write new 'Variable name' as "PYTHON_SCRIPTS" >
Copy that path of `pip3.exe` and paste within variable value > `OK` >

>Below again find out and click on `Path` under 'system variables' >
Edit this path >
Within 'Variable value' append and paste the same path of `pip3.exe` after putting a ';' >
Click `OK`/`Apply` and come out.

Step 3: Now, open cmd bash/shell by Pressing key Windows+R.

> Write 'pip3' and press 'Enter'. If pip3 is recognized you can go ahead.

Step 4: In this same cmd

> Write path of the `pip3.exe` followed by `/pip install 'package name'`

As Example just write:

C:/Users/name/AppData/Local/Programs/Python/Python36-32/Scripts/pip install matplotlib

Press Enter now. The Package matplotlib will start getting downloaded.

Further, for upgrading any package

Open cmd bash/shell again, then

type that path of pip3.exe followed by /pip install --upgrade 'package name' Press Enter.

As Example just write:

C:/Users/name/AppData/Local/Programs/Python/Python36-32/Scripts/pip install --upgrade matplotlib

Upgrading of the package will start :)

NameError: global name 'xrange' is not defined in Python 3

in python 2.x, xrange is used to return a generator while range is used to return a list. In python 3.x , xrange has been removed and range returns a generator just like xrange in python 2.x. Therefore, in python 3.x you need to use range rather than xrange.

How to check if object property exists with a variable holding the property name?

You can use hasOwnProperty() as well as in operator.

In Python, how do I read the exif data for an image?

I have found that using ._getexif doesn't work in higher python versions, moreover, it is a protected class and one should avoid using it if possible. After digging around the debugger this is what I found to be the best way to get the EXIF data for an image:

from PIL import Image

def get_exif(path):
    return Image.open(path).info['parsed_exif']

This returns a dictionary of all the EXIF data of an image.

Note: For Python3.x use Pillow instead of PIL

Sun JSTL taglib declaration fails with "Can not find the tag library descriptor"

This is a fix for people who are not using maven. You also need to add standard.jar to your lib folder for the core tag library to work. Works for jstl version 1.1.

<%@taglib prefix="core" uri="http://java.sun.com/jsp/jstl/core"%>

laravel-5 passing variable to JavaScript

$langs = Language::all()->toArray();
return View::make('NAATIMockTest.Admin.Language.index', [
    'langs' => $langs
]);

then in view

<script type="text/javascript">
    var langs = {{json_encode($langs)}};
    console.log(langs);
</script>

Its not pretty tho

How to dump only specific tables from MySQL?

If you're in local machine then use this command

/usr/local/mysql/bin/mysqldump -h127.0.0.1 --port = 3306 -u [username] -p [password] --databases [db_name] --tables [tablename] > /to/path/tablename.sql;

For remote machine, use below one

/usr/local/mysql/bin/mysqldump -h [remoteip] --port = 3306 -u [username] -p [password] --databases [db_name] --tables [tablename] > /to/path/tablename.sql;

Find elements inside forms and iframe using Java and Selenium WebDriver

On Selenium >= 3.41 (C#) the rigth syntax is:

webDriver = webDriver.SwitchTo().Frame(webDriver.FindElement(By.Name("icontent")));

Pushing value of Var into an Array

.val() does not return an array from a DOM element: $('#fruit') is going to find the element in the document with an ID of #fruit and get its value (if it has a value).

How do I compare strings in Java?

I agree with the answer from zacherates.

But what you can do is to call intern() on your non-literal strings.

From zacherates example:

// ... but they are not the same object
new String("test") == "test" ==> false

If you intern the non-literal String equality is true:

new String("test").intern() == "test" ==> true

How to convert an object to JSON correctly in Angular 2 with TypeScript

If you are solely interested in outputting the JSON somewhere in your HTML, you could also use a pipe inside an interpolation. For example:

<p> {{ product | json }} </p>

I am not entirely sure it works for every AngularJS version, but it works perfectly in my Ionic App (which uses Angular 2+).

Where to find the complete definition of off_t type?

Since this answer still gets voted up, I want to point out that you should almost never need to look in the header files. If you want to write reliable code, you're much better served by looking in the standard. A better question than "how is off_t defined on my machine" is "how is off_t defined by the standard?". Following the standard means that your code will work today and tomorrow, on any machine.

In this case, off_t isn't defined by the C standard. It's part of the POSIX standard, which you can browse here.

Unfortunately, off_t isn't very rigorously defined. All I could find to define it is on the page on sys/types.h:

blkcnt_t and off_t shall be signed integer types.

This means that you can't be sure how big it is. If you're using GNU C, you can use the instructions in the answer below to ensure that it's 64 bits. Or better, you can convert to a standards defined size before putting it on the wire. This is how projects like Google's Protocol Buffers work (although that is a C++ project).

So, I think "where do I find the definition in my header files" isn't the best question. But, for completeness here's the answer:

On my machine (and most machines using glibc) you'll find the definition in bits/types.h (as a comment says at the top, never directly include this file), but it's obscured a bit in a bunch of macros. An alternative to trying to unravel them is to look at the preprocessor output:

#include <stdio.h>
#include <sys/types.h>

int main(void) {
  off_t blah;

  return 0;
}

And then:

$ gcc -E sizes.c  | grep __off_t
typedef long int __off_t;
....

However, if you want to know the size of something, you can always use the sizeof() operator.

Edit: Just saw the part of your question about the __. This answer has a good discussion. The key point is that names starting with __ are reserved for the implementation (so you shouldn't start your own definitions with __).

'sprintf': double precision in C

The problem is with sprintf

sprintf(aa,"%lf",a);

%lf says to interpet "a" as a "long double" (16 bytes) but it is actually a "double" (8 bytes). Use this instead:

sprintf(aa, "%f", a);

More details here on cplusplus.com

Why is my asynchronous function returning Promise { <pending> } instead of a value?

I had the same issue earlier, but my situation was a bit different in the front-end. I'll share my scenario anyway, maybe someone might find it useful.

I had an api call to /api/user/register in the frontend with email, password and username as request body. On submitting the form(register form), a handler function is called which initiates the fetch call to /api/user/register. I used the event.preventDefault() in the beginning line of this handler function, all other lines,like forming the request body as well the fetch call was written after the event.preventDefault(). This returned a pending promise.

But when I put the request body formation code above the event.preventDefault(), it returned the real promise. Like this:

event.preventDefault();
    const data = {
        'email': email,
        'password': password
    }
    fetch(...)
     ...

instead of :

     const data = {
            'email': email,
            'password': password
        }
     event.preventDefault();
     fetch(...)
     ...

Adding a splash screen to Flutter apps

This is the error free and best way to add dynamic splash screen in Flutter.

MAIN.DART

import 'package:flutter/material.dart';
import 'constant.dart';

void main() => runApp(MaterialApp(
      title: 'GridView Demo',
      home: SplashScreen(),
      theme: ThemeData(
        primarySwatch: Colors.red,
        accentColor: Color(0xFF761322),
      ),
      routes: <String, WidgetBuilder>{
        SPLASH_SCREEN: (BuildContext context) => SplashScreen(),
        HOME_SCREEN: (BuildContext context) => BasicTable(),
        //GRID_ITEM_DETAILS_SCREEN: (BuildContext context) => GridItemDetails(),
      },
    ));

SPLASHSCREEN.DART

import 'dart:async';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:app_example/constants.dart';


class SplashScreen extends StatefulWidget {
  @override
  SplashScreenState createState() => new SplashScreenState();
}

class SplashScreenState extends State<SplashScreen>
    with SingleTickerProviderStateMixin {
  var _visible = true;

  AnimationController animationController;
  Animation<double> animation;

  startTime() async {
    var _duration = new Duration(seconds: 3);
    return new Timer(_duration, navigationPage);
  }

  void navigationPage() {
    Navigator.of(context).pushReplacementNamed(HOME_SCREEN);
  }

@override
dispose() {
  animationController.dispose();  
  super.dispose();
}

  @override
  void initState() {
    super.initState();
    animationController = new AnimationController(
      vsync: this,
      duration: new Duration(seconds: 2),
    );
    animation =
        new CurvedAnimation(parent: animationController, curve: Curves.easeOut);

    animation.addListener(() => this.setState(() {}));
    animationController.forward();

    setState(() {
      _visible = !_visible;
    });
    startTime();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Stack(
        fit: StackFit.expand,
        children: <Widget>[
          new Column(
            mainAxisAlignment: MainAxisAlignment.end,
            mainAxisSize: MainAxisSize.min,
            children: <Widget>[
              Padding(
                padding: EdgeInsets.only(bottom: 30.0),
                child: new Image.asset(
                  'assets/images/powered_by.png',
                  height: 25.0,
                  fit: BoxFit.scaleDown,
                ),
              )
            ],
          ),
          new Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              new Image.asset(
                'assets/images/logo.png',
                width: animation.value * 250,
                height: animation.value * 250,
              ),
            ],
          ),
        ],
      ),
    );
  }
}

CONSTANTS.DART

String SPLASH_SCREEN='SPLASH_SCREEN';
String HOME_SCREEN='HOME_SCREEN';

HOMESCREEN.DART

import 'package:flutter/material.dart';

class BasicTable extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("Table Widget")),
      body: Center(child: Text("Table Widget")),
    );
  }
}

IndexOf function in T-SQL

One very small nit to pick:

The RFC for email addresses allows the first part to include an "@" sign if it is quoted. Example:

"john@work"@myemployer.com

This is quite uncommon, but could happen. Theoretically, you should split on the last "@" symbol, not the first:

SELECT LEN(EmailField) - CHARINDEX('@', REVERSE(EmailField)) + 1

More information:

http://en.wikipedia.org/wiki/Email_address

Using HttpClient and HttpPost in Android with post parameters

I've just checked and i have the same code as you and it works perferctly. The only difference is how i fill my List for the params :

I use a : ArrayList<BasicNameValuePair> params

and fill it this way :

 params.add(new BasicNameValuePair("apikey", apikey);

I do not use any JSONObject to send params to the webservices.

Are you obliged to use the JSONObject ?

Programs & Examples On #Scriptresource.axd

how to solve Error cannot add duplicate collection entry of type add with unique key attribute 'value' in iis 7

IE9 JavaScript error: SCRIPT5007: Unable to get value of the property 'ui': object is null or undefined

ASP.NET IIS Web.config [Internal Server Error]

Web Application Problems (web.config errors) HTTP 500.19 with IIS7.5 and ASP.NET v2

Sys is undefined

Google Apps Script to open a URL

How do I check if a Sql server string is null or empty

How to add scroll bar to the Relative Layout?

What does .shape[] do in "for i in range(Y.shape[0])"?

Converting EditText to int? (Android)

Select data between a date/time range

Wait until page is loaded with Selenium WebDriver for Python

How to properly -filter multiple strings in a PowerShell copy script

Checking if a date is valid in javascript

PHPUnit assert that an exception was thrown?

How to print out a variable in makefile

How can I auto increment the C# assembly version via our CI platform (Hudson)?

Simple linked list in C++

Convert HttpPostedFileBase to byte[]

Colouring plot by factor in R

Python extending with - using super() Python 3 vs Python 2

Converting NSString to NSDate (and back again)

diff current working copy of a file with another branch's committed copy

HTML5 LocalStorage: Checking if a key exists

Loop through JSON in EJS

How can I use UserDefaults in Swift?

Stacked Tabs in Bootstrap 3

How to expire a cookie in 30 minutes using jQuery?

Relative instead of Absolute paths in Excel VBA

How to cherry-pick multiple commits

How to check if a socket is connected/disconnected in C#?

jQuery detect if string contains something

How do I open port 22 in OS X 10.6.7

How to Clone Objects

Get response from PHP file using AJAX

react-native: command not found

What is mutex and semaphore in Java ? What is the main difference?

Plotting a python dict in order of key values

Two models in one view in ASP MVC 3

How do you remove columns from a data.frame?

Is it possible to change the location of packages for NuGet?

Convert an int to ASCII character

When should one use a spinlock instead of mutex?

Difference between applicationContext.xml and spring-servlet.xml in Spring Framework

How to declare a global variable in C++

XmlSerializer: remove unnecessary xsi and xsd namespaces

JUnit: how to avoid "no runnable methods" in test utils classes

Using Notepad++ to validate XML against an XSD

Is it possible in Java to catch two exceptions in the same catch block?

Submit two forms with one button

Disable vertical sync for glxgears

How to make a browser display a "save as dialog" so the user can save the content of a string to a file on his system?

Copying a rsa public key to clipboard

Using current time in UTC as default value in PostgreSQL

Creating for loop until list.length

JAX-RS / Jersey how to customize error handling?

Remove trailing newline from the elements of a string list

Java Error: illegal start of expression

mkdir's "-p" option

Xcode stops working after set "xcode-select -switch"

How to run VBScript from command line without Cscript/Wscript

How to use timeit module

Mac SQLite editor

ScriptManager.RegisterStartupScript code not working - why?

click() event is calling twice in jquery

docker container ssl certificates

How to remove unwanted space between rows and columns in table?

Select from table by knowing only date without time (ORACLE)

How to Access Hive via Python?

How can I reduce the waiting (ttfb) time

Using Html.ActionLink to call action on different controller

cut or awk command to print first field of first row

Horizontal scroll on overflow of table

The solution for those who cannot or do not want to wrap the table in a div (e.g. if the HTML is generated from Markdown) but still want to have scrollbars:

Find ALL tweets from a user (not just the first 3,200)

Difference in boto3 between resource, client, and session?

git clone: Authentication failed for <URL>

How to Round to the nearest whole number in C#

Length of array in function argument

The solution for those who cannot or do not want to wrap the `table` in a `div` (e.g. if the HTML is generated from Markdown) but still want to have scrollbars: