Programs & Examples On #Instanceof

This is a typical scenario where subtype polymorphism helps. Do the following

interface I {
  void do();
}

class A implements I { void do() { doA() } ... }
class B implements I { void do() { doB() } ... }
class C implements I { void do() { doC() } ... }

Then you can simply call do() on this.

If you are not free to change A, B, and C, you could apply the visitor pattern to achieve the same.

When using instanceof, you need to know the class of B at compile time. When using isAssignableFrom() it can be dynamic and change during runtime.

getClass() has the restriction that objects are only equal to other objects of the same class, the same run time type, as illustrated in the output of below code:

class ParentClass{
}
public class SubClass extends ParentClass{
    public static void main(String []args){
        ParentClass parentClassInstance = new ParentClass();
        SubClass subClassInstance = new SubClass();
        if(subClassInstance instanceof ParentClass){
            System.out.println("SubClass extends ParentClass. subClassInstance is instanceof ParentClass");
        }
        if(subClassInstance.getClass() != parentClassInstance.getClass()){
            System.out.println("Different getClass() return results with subClassInstance and parentClassInstance ");
        }
    }
}

Outputs:

SubClass extends ParentClass. subClassInstance is instanceof ParentClass.

Different getClass() return results with subClassInstance and parentClassInstance.

Try using:

if(NewType* v = dynamic_cast<NewType*>(old)) {
   // old was safely casted to NewType
   v->doSomething();
}

This requires your compiler to have rtti support enabled.

EDIT: I've had some good comments on this answer!

Every time you need to use a dynamic_cast (or instanceof) you'd better ask yourself whether it's a necessary thing. It's generally a sign of poor design.

Typical workarounds is putting the special behaviour for the class you are checking for into a virtual function on the base class or perhaps introducing something like a visitor where you can introduce specific behaviour for subclasses without changing the interface (except for adding the visitor acceptance interface of course).

As pointed out dynamic_cast doesn't come for free. A simple and consistently performing hack that handles most (but not all cases) is basically adding an enum representing all the possible types your class can have and check whether you got the right one.

if(old->getType() == BOX) {
   Box* box = static_cast<Box*>(old);
   // Do something box specific
}

This is not good oo design, but it can be a workaround and its cost is more or less only a virtual function call. It also works regardless of RTTI is enabled or not.

Note that this approach doesn't support multiple levels of inheritance so if you're not careful you might end with code looking like this:

// Here we have a SpecialBox class that inherits Box, since it has its own type
// we must check for both BOX or SPECIAL_BOX
if(old->getType() == BOX || old->getType() == SPECIAL_BOX) {
   Box* box = static_cast<Box*>(old);
   // Do something box specific
}

Instanceof is very fast. It boils down to a bytecode that is used for class reference comparison. Try a few million instanceofs in a loop and see for yourself.

Technically you shouldn't have to, that's the point of generics, so you can do compile-type checking:

public int indexOf(E arg0) {
   ...
}

but then the @Override may be a problem if you have a class hierarchy. Otherwise see Yishai's answer.

Other Significant practical differences:

// Boolean

var str3 = true ;

alert(str3);

alert(str3 instanceof Boolean);  // false: expect true  

alert(typeof str3 == "boolean" ); // true

// Number

var str4 = 100 ;

alert(str4);

alert(str4 instanceof Number);  // false: expect true   

alert(typeof str4 == "number" ); // true

If you know that a parameter will definitely be either an array or an object, it may be easier to check for an array compared to checking for an object with something like this.

function myIsArray (arr) {
    return (arr.constructor === Array);
}

type() ?

>>> class A:
...     def whoami(self):
...         print(type(self).__name__)
...
>>>
>>> class B(A):
...     pass
...
>>>
>>>
>>> o = B()
>>> o.whoami()
'B'
>>>

Basically, you check if an object is an instance of a specific class. You normally use it, when you have a reference or parameter to an object that is of a super class or interface type and need to know whether the actual object has some other type (normally more concrete).

Example:

public void doSomething(Number param) {
  if( param instanceof Double) {
    System.out.println("param is a Double");
  }
  else if( param instanceof Integer) {
    System.out.println("param is an Integer");
  }

  if( param instanceof Comparable) {
    //subclasses of Number like Double etc. implement Comparable
    //other subclasses might not -> you could pass Number instances that don't implement that interface
    System.out.println("param is comparable"); 
  }
}

Note that if you have to use that operator very often it is generally a hint that your design has some flaws. So in a well designed application you should have to use that operator as little as possible (of course there are exceptions to that general rule).

You can create a utility class to check if the class represents any Collection, Map or Array

  public static boolean isCollection(Class<?> rawPropertyType) {
        return Collection.class.isAssignableFrom(rawPropertyType) || 
               Map.class.isAssignableFrom(rawPropertyType) || 
               rawPropertyType.isArray();
 }

Simply call

print(unknownDataType.runtimeType)

on the data.

instanceof is just syntactic sugar for isPrototypeOf:

function Ctor() {}
var o = new Ctor();

o instanceof Ctor; // true
Ctor.prototype.isPrototypeOf(o); // true

o instanceof Ctor === Ctor.prototype.isPrototypeOf(o); // equivalent

instanceof just depends on the prototype of a constructor of an object.

A constructor is just a normal function. Strictly speaking it is a function object, since everything is an object in Javascript. And this function object has a prototype, because every function has a prototype.

A prototype is just a normal object, which is located within the prototype chain of another object. That means being in the prototype chain of another object makes an object to a prototype:

function f() {} //  ordinary function
var o = {}, // ordinary object
 p;

f.prototype = o; // oops, o is a prototype now
p = new f(); // oops, f is a constructor now

o.isPrototypeOf(p); // true
p instanceof f; // true

The instanceof operator should be avoided because it fakes classes, which do not exist in Javascript. Despite the class keyword not in ES2015 either, since class is again just syntactic sugar for...but that's another story.

For me the confusion caused by

"str".__proto__ // #1
=> String

So "str" istanceof String should return true because how istanceof works as below:

"str".__proto__ == String.prototype // #2
=> true

Results of expression #1 and #2 conflict each other, so there should be one of them wrong.

#1 is wrong

I figure out that it caused by the __proto__ is non standard property, so use the standard one:Object.getPrototypeOf

Object.getPrototypeOf("str") // #3
=> TypeError: Object.getPrototypeOf called on non-object

Now there's no confusion between expression #2 and #3

Both methods have their problems.

If the subclass changes the identity, then you need to compare their actual classes. Otherwise, you violate the symmetric property. For instance, different types of Persons should not be considered equivalent, even if they have the same name.

However, some subclasses don't change identity and these need to use instanceof. For instance, if we have a bunch of immutable Shape objects, then a Rectangle with length and width of 1 should be equal to the unit Square.

In practice, I think the former case is more likely to be true. Usually, subclassing is a fundamental part of your identity and being exactly like your parent except you can do one little thing does not make you equal.

Class.isAssignableFrom() - works for interfaces as well. If you don't want that, you'll have to call getSuperclass() and test until you reach Object.

class Test48{
public static void main (String args[]){
Object Obj=new Hello();
//Hello obj=new Hello;
System.out.println(Obj instanceof String);
System.out.println(Obj instanceof Hello);
System.out.println(Obj instanceof Object);
Hello h=null;
System.out.println(h instanceof Hello);
System.out.println(h instanceof Object);
}
}  

You can use the SimpleXMLElement::asXML() method to accomplish this:

$string = "<element><child>Hello World</child></element>";
$xml = new SimpleXMLElement($string);

// The entire XML tree as a string:
// "<element><child>Hello World</child></element>"
$xml->asXML();

// Just the child node as a string:
// "<child>Hello World</child>"
$xml->child->asXML();

You can use Context.checkCallingorSelfPermission() function for this. Here is an example:

private boolean checkWriteExternalPermission()
{
    String permission = android.Manifest.permission.WRITE_EXTERNAL_STORAGE;
    int res = getContext().checkCallingOrSelfPermission(permission);
    return (res == PackageManager.PERMISSION_GRANTED);            
}

Added a few optional parameters for creating "future safe" sequences.

CREATE SEQUENCE <NAME>
  START WITH 1
  INCREMENT BY 1
  NO MAXVALUE
  NO CYCLE
  CACHE 10;

The problem is an issue of semantic meaning (as BoltClock mentions) and visual rendering.

Originally HTML used <b> and <i> for these purposes, entirely stylistic commands, laid down in the semantic environment of the document markup. CSS is an attempt to separate out as far as possible the stylistic elements of the medium. Thus style information such as bold and italics should go in CSS.

<strong> and <em> were introduced to fill the semantic need for text to be marked as more important or stressed. They have default stylistic interpretations akin to bold and italic, but they are not bound to that fate.

Add this to html:

<svg id="mySVG" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"/>

Try this function and adapt for you program:

var svgNS = "http://www.w3.org/2000/svg";  

function createCircle()
{
    var myCircle = document.createElementNS(svgNS,"circle"); //to create a circle. for rectangle use "rectangle"
    myCircle.setAttributeNS(null,"id","mycircle");
    myCircle.setAttributeNS(null,"cx",100);
    myCircle.setAttributeNS(null,"cy",100);
    myCircle.setAttributeNS(null,"r",50);
    myCircle.setAttributeNS(null,"fill","black");
    myCircle.setAttributeNS(null,"stroke","none");

    document.getElementById("mySVG").appendChild(myCircle);
}     

According to the documentation you can decode JPEG/PNG images.

It should be something like this:

import tensorflow as tf

filenames = ['/image_dir/img.jpg']
filename_queue = tf.train.string_input_producer(filenames)

reader = tf.WholeFileReader()
key, value = reader.read(filename_queue)

images = tf.image.decode_jpeg(value, channels=3)

You can find a bit more info here

~$ echo $PATH
/home/jack/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
~$ whereis lshw
lshw: /usr/bin/lshw /usr/share/man/man1/lshw.1.gz

we can simply use in.next().charAt(0); to assign + - * / operations as characters by initializing operation as a char.

import java.util.*; public class Calculator {

public static void main(String[] args) {

Scanner in = new Scanner(System.in);

char operation;
int num1;
int num2;

 System.out.println("Enter First Number");

num1 = in.nextInt();

System.out.println("Enter Operation");

operation = in.next().charAt(0);

System.out.println("Enter Second Number");

num2 = in.nextInt();

if (operation == '+')//make sure single quotes
{
    System.out.println("your answer is " + (num1 + num2));
}
if (operation == '-')
{
    System.out.println("your answer is " + (num1 - num2));
}
if (operation == '/')
{
    System.out.println("your answer is " + (num1 / num2));
}
if (operation == '*')
{
    System.out.println("your answer is " + (num1 * num2));
}

}

}

Some of the other solutions might not work if you created the cookie manually.

Here's a quick way to delete a cookie:

document.cookie = 'COOKIE_NAME=; Max-Age=0; path=/; domain=' + location.host;

say the string you want to turn into a number is in the variable S

a=tonumber(S)

provided that there are numbers and only numbers in S it will return a number, but if there are any characters that are not numbers (except periods for floats) it will return nil

This is how to open any file:

from os import path

filepath = '...' # your path
file = open(filepath, 'r')

<html>
<head>
<title></title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.js"></script>
<script type="text/javascript">

$(function() {

    //here you have the control over the body of the iframe document
    var iBody = $("#iView").contents().find("body");

    //here you have the control over any element (#myContent)
    var myContent = iBody.find("#myContent");

});

</script>
</head>
<body>
  <iframe src="mifile.html" id="iView" style="width:200px;height:70px;border:dotted 1px red" frameborder="0"></iframe>
</body>
</html>

Always double check httpd.conf to see if document root is correctly pointing to an existing folder

#if you have c:\your-main-folder\www\
DocumentRoot "c:/your-main-folder/www/" 

#if you have c:\your-main-folder\www\sub-folder\
DocumentRoot "c:/your-main-folder/www/sub-folder/" 

DocumentRoot points to a folder that must exist in your drive.

I would also like to add a solution that uses slots:

class Point:
    __slots__ = ["x", "y"]
    def __init__(self, x, y):
        self.x = x
        self.y = y

Definitely check the documentation for slots but a quick explanation of slots is that it is python's way of saying: "If you can lock these attributes and only these attributes into the class such that you commit that you will not add any new attributes once the class is instantiated (yes you can add new attributes to a class instance, see example below) then I will do away with the large memory allocation that allows for adding new attributes to a class instance and use just what I need for these slotted attributes".

Example of adding attributes to class instance (thus not using slots):

class Point:
    def __init__(self, x, y):
        self.x = x
        self.y = y

p1 = Point(3,5)
p1.z = 8
print(p1.z)

Output: 8

Example of trying to add attributes to class instance where slots was used:

class Point:
    __slots__ = ["x", "y"]
    def __init__(self, x, y):
        self.x = x
        self.y = y

p1 = Point(3,5)
p1.z = 8

Output: AttributeError: 'Point' object has no attribute 'z'

This can effectively works as a struct and uses less memory than a class (like a struct would, although I have not researched exactly how much). It is recommended to use slots if you will be creating a large amount of instances of the object and do not need to add attributes. A point object is a good example of this as it is likely that one may instantiate many points to describe a dataset.

Update: Please see Jonathan's answer for an updated way to handle this. The answer below may still work, but it could likely trigger some false positives in other browsers.

var isChrome = /Chrome/.test(navigator.userAgent) && /Google Inc/.test(navigator.vendor);

However, as mentioned User Agents can be spoofed so it is always best to use feature-detection (e.g. Modernizer) when handling these issues, as other answers mention.

I created this function to convert struct to JSON string by ignoring some fields. Hope it will help.

func GetJSONString(obj interface{}, ignoreFields ...string) (string, error) {
    toJson, err := json.Marshal(obj)
    if err != nil {
        return "", err
    }

    if len(ignoreFields) == 0 {
        return string(toJson), nil
    }

    toMap := map[string]interface{}{}
    json.Unmarshal([]byte(string(toJson)), &toMap)

    for _, field := range ignoreFields {
        delete(toMap, field)
    }

    toJson, err = json.Marshal(toMap)
    if err != nil {
        return "", err
    }
    return string(toJson), nil
}

Example: https://play.golang.org/p/nmq7MFF47Gp

The most common answer to that is simple: Bundle few apps (busybox?) with your APK (assuming you want to use it within an application). As far as I know, the /data partition is not mounted noexec, and even if you don't want to deploy a fully-fledged APK, you could modify ConnectBot sources to build an APK with a set of command line tools included.

For command line tools, I recommend using crosstool-ng and building a set of statically-linked tools (linked against uClibc). They might be big, but they'll definitely work.

From the Documentation

As with components, you can add as many directive property bindings as you need by stringing them along in the template.

Add an input property to HighlightDirective called defaultColor:

@Input() defaultColor: string;

Markup

<p [myHighlight]="color" defaultColor="violet">
  Highlight me too!
</p>

Angular knows that the defaultColor binding belongs to the HighlightDirective because you made it public with the @Input decorator.

Either way, the @Input decorator tells Angular that this property is public and available for binding by a parent component. Without @Input, Angular refuses to bind to the property.

For your example

With many parameters

Add properties into the Directive class with @Input() decorator

@Directive({
    selector: '[selectable]'
})
export class SelectableDirective{
    private el: HTMLElement;

    @Input('selectable') option:any;   
    @Input('first') f;
    @Input('second') s;

    ...
}

And in the template pass bound properties to your li element

<li *ngFor = 'let opt of currentQuestion.options' 
    [selectable] = 'opt' 
    [first]='YourParameterHere'
    [second]='YourParameterHere'
    (selectedOption) = 'onOptionSelection($event)'>
    {{opt.option}}
</li>

Here on the li element we have a directive with name selectable. In the selectable we have two @Input()'s, f with name first and s with name second. We have applied these two on the li properties with name [first] and [second]. And our directive will find these properties on that li element, which are set for him with @Input() decorator. So selectable, [first] and [second] will be bound to every directive on li, which has property with these names.

With single parameter

@Directive({
    selector: '[selectable]'
})
export class SelectableDirective{
    private el: HTMLElement;

    @Input('selectable') option:any;   
    @Input('params') params;

    ...
}

Markup

<li *ngFor = 'let opt of currentQuestion.options' 
    [selectable] = 'opt' 
    [params]='{firstParam: 1, seconParam: 2, thirdParam: 3}'
    (selectedOption) = 'onOptionSelection($event)'>
    {{opt.option}}
</li>

When you want to use a non-blocking window (show() instead of showDialog()), this not work:

//not work with .Show(this) but only with .ShowDialog(this)
loginForm.StartPosition = FormStartPosition.CenterParent;
loginForm.Show(this);

In this case, you can use this code to center child form before display the form:

//this = the parent
frmDownloadPercent frm = new frmDownloadPercent();
frm.Show(this); //this = the parent form
//here the tips
frm.Top = this.Top + ((this.Height / 2) - (frm.Height / 2));
frm.Left = this.Left + ((this.Width / 2) - (frm.Width / 2));

For me the error was:

Error: unexpected input in "?"

and the fix was opening the script in a hex editor and removing the first 3 characters from the file. The file was starting with an UTF-8 BOM and it seems that Rscript can't read that.

EDIT: OP requested an example. Here it goes.

?  ~ cat a.R
cat('hello world\n')
?  ~ xxd a.R
00000000: efbb bf63 6174 2827 6865 6c6c 6f20 776f  ...cat('hello wo
00000010: 726c 645c 6e27 290a                      rld\n').
?  ~ R -f a.R        

R version 3.4.4 (2018-03-15) -- "Someone to Lean On"
Copyright (C) 2018 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

  Natural language support but running in an English locale

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> cat('hello world\n')
Error: unexpected input in "?"
Execution halted

There is a dynamic filter pipe that I use

Source data:

items = [{foo: 'hello world'}, {foo: 'lorem ipsum'}, {foo: 'foo bar'}];

In the template you can dinamically set the filter in any object attr:

<li *ngFor="let item of items | filter:{foo:'bar'}">

The pipe:

  import { Pipe, PipeTransform } from '@angular/core';

  @Pipe({
    name: 'filter',
  })
  export class FilterPipe implements PipeTransform {
    transform(items: any[], filter: Record<string, any>): any {
      if (!items || !filter) {
        return items;
      }

      const key = Object.keys(filter)[0];
      const value = filter[key];

      return items.filter((e) => e[key].indexOf(value) !== -1);
    }
  }

Don't forget to register the pipe in your app.module.ts declarations

Create an object holding following properties with an appropriate name.

1. message
2. timestamp
3. count
4. version

and use this as a value in your map.

Also consider overriding the equals() and hashCode() method accordingly if you do not want object equality to be used for comparison (e.g. when inserting values into your map).

It works for me:

$('#yourselect').on("change", function(e) { 
   // what you would like to happen
});

All you need is to give the AnchorPane an ID, and then you can get the Stage from that.

@FXML private AnchorPane ap;
Stage stage = (Stage) ap.getScene().getWindow();

From here, you can add in the Listener that you need.

Edit: As stated by EarthMind below, it doesn't have to be the AnchorPane element; it can be any element that you've defined.

Register an event listener for keyup event:

document.getElementById("input").addEventListener("keyup", function(e){
  var someVarName = input.value;
  sessionStorage.setItem("someVarKey", someVarName);
  input.value = sessionStorage.getItem("someVarKey");
});

var res = from s in Splitting 
          join c in Customer on s.CustomerId equals c.Id
         where c.Id == customrId
            && c.CompanyId == companyId
        select s;

Using Extension methods:

var res = Splitting.Join(Customer,
                 s => s.CustomerId,
                 c => c.Id,
                 (s, c) => new { s, c })
           .Where(sc => sc.c.Id == userId && sc.c.CompanyId == companId)
           .Select(sc => sc.s);

In my case I substitute it with utf8_general_ci with sed like this:

sed -i 's/utf8_0900_ai_ci/utf8_general_ci/g' MY_DB.sql 
sed -i 's/utf8mb4_unicode_520_ci/utf8_general_ci/g' MY_DB.sql 

After that, I can import it without any issue.

I came here looking for how to delete empty __init__.py files as they are implicit in Python 3.3+ and ended up using:

find -depth '(' -type f  -name __init__.py ')' -print0 |
  while IFS= read -d '' -r file; do if [[ ! -s $file ]]; then rm $file; fi; done

Also (at least in zsh) using $path as the variable also breaks your $PATH env and so it'll break your open shell. Anyway, thought I'd share!

SELECT LASTNAME, COUNT(*)
FROM STUDENTS
GROUP BY LASTNAME
ORDER BY COUNT(*) DESC

A suggestion of code that I just used in my project using AngularJS v1.7.2

$http.get('LabelsPDF?ids=' + ids, { responseType: 'arraybuffer' })
            .then(function (response) {
                var file = new Blob([response.data], { type: 'application/pdf' });
                var fileURL = URL.createObjectURL(file);
                $scope.ContentPDF = $sce.trustAsResourceUrl(fileURL);
            });

<embed ng-src="{{ContentPDF}}" type="application/pdf" class="col-xs-12" style="height:100px; text-align:center;" />

The test has to be done on a page that queries a database so yes typically that is a login page because it's the page that can do the most harm but could be an unsecure page as well.

Generally you would have your database queries behind a secure login but if you just have a listing of items or something that you don't care if the world sees a hacker could append some sql injection to the end of the querystring.

The key with SQL Injection is the person doing the injection would have to know that your querying a database so if your not querying a database then no sql inject can be done. If your form is submitting to a database then yes they could SQL Inject that. It's always good practice to use either stored procedures to select/insert/update/delete or make sure you prepare or escape out all the statements that will be hitting the database.

let fs = require('fs');
let markers;
fs.readFile('./markers.json', handleJSONFile);

var handleJSONFile = function (err, data) {
   if (err) {
      throw err;
   }
   markers= JSON.parse(data);
 }

In addition to the answer of @Charles-Duffy, you can use winpty directly without installing/downloading anything extra. Just run winpty c:/Python27/python.exe. The utility winpty.exe can be found at Git\usr\bin. I'm using Git for Windows v2.7.1

The prebuilt binaries from @Charles-Duffy is version 0.1.1(according to the file name), while the included one is 0.2.2

You can also use references on foreach values:

foreach($array as $elementKey => &$element) {
    // $element is the same than &$array[$elementKey]
    if (isset($element['id']) and $element['id'] == 'searched_value') {
        unset($element);
    }
}

Have just started switching over a project to c++11 and came across a perfectly good situation for constexpr which cleans up alternative methods of performing the same operation. The key point here is that you can only place the function into the array size declaration when it is declared constexpr. There are a number of situations where I can see this being very useful moving forward with the area of code that I am involved in.

constexpr size_t GetMaxIPV4StringLength()
{
    return ( sizeof( "255.255.255.255" ) );
}

void SomeIPFunction()
{
    char szIPAddress[ GetMaxIPV4StringLength() ];
    SomeIPGetFunction( szIPAddress );
}

There is a very good answer to the same question.
Adding following lines to "~/.gitconfig":

[alias]
lg1 = log --graph --abbrev-commit --decorate --date=relative --format=format:'%C(bold blue)%h%C(reset) - %C(bold green)(%ar)%C(reset) %C(white)%s%C(reset) %C(dim white)- %an%C(reset)%C(bold yellow)%d%C(reset)' --all
lg2 = log --graph --abbrev-commit --decorate --format=format:'%C(bold blue)%h%C(reset) - %C(bold cyan)%aD%C(reset) %C(bold green)(%ar)%C(reset)%C(bold yellow)%d%C(reset)%n''          %C(white)%s%C(reset) %C(dim white)- %an%C(reset)' --all
lg = !"git lg1"

I prefer using an adjacency list of Indices ( not pointers )

typedef std::vector< Vertex > Vertices;
typedef std::set <int> Neighbours;


struct Vertex {
private:
   int data;
public:
   Neighbours neighbours;

   Vertex( int d ): data(d) {}
   Vertex( ): data(-1) {}

   bool operator<( const Vertex& ref ) const {
      return ( ref.data < data );
   }
   bool operator==( const Vertex& ref ) const {
      return ( ref.data == data );
   }
};

class Graph
{
private :
   Vertices vertices;
}

void Graph::addEdgeIndices ( int index1, int index2 ) {
  vertices[ index1 ].neighbours.insert( index2 );
}


Vertices::iterator Graph::findVertexIndex( int val, bool& res )
{
   std::vector<Vertex>::iterator it;
   Vertex v(val);
   it = std::find( vertices.begin(), vertices.end(), v );
   if (it != vertices.end()){
        res = true;
       return it;
   } else {
       res = false;
       return vertices.end();
   }
}

void Graph::addEdge ( int n1, int n2 ) {

   bool foundNet1 = false, foundNet2 = false;
   Vertices::iterator vit1 = findVertexIndex( n1, foundNet1 );
   int node1Index = -1, node2Index = -1;
   if ( !foundNet1 ) {
      Vertex v1( n1 );
      vertices.push_back( v1 );
      node1Index = vertices.size() - 1;
   } else {
      node1Index = vit1 - vertices.begin();
   }
   Vertices::iterator vit2 = findVertexIndex( n2, foundNet2);
   if ( !foundNet2 ) {
      Vertex v2( n2 );
      vertices.push_back( v2 );
      node2Index = vertices.size() - 1;
   } else {
      node2Index = vit2 - vertices.begin();
   }

   assert( ( node1Index > -1 ) && ( node1Index <  vertices.size()));
   assert( ( node2Index > -1 ) && ( node2Index <  vertices.size()));

   addEdgeIndices( node1Index, node2Index );
}

You can try this to get your combination:

as.numeric(rbind(test$x, test$y))

which will return:

26, 34, 21, 29, 20, 28

import { AfterViewInit, Component, ElementRef} from '@angular/core';

constructor(private elementRef:ElementRef) {}

ngAfterViewInit() {
  this.elementRef.nativeElement.querySelector('my-element')
                                .addEventListener('click', this.onClick.bind(this));
}

onClick(event) {
  console.log(event);
}

You can try getting a list from the map object by just iterating each item in the object and store it in a different variable.

a = map(chr, [66, 53, 0, 94])
b = [item for item in a]
print(b)
>>>['B', '5', '\x00', '^']

There are two possible solutions for these kind of situations:

1. Use the solution suggested on this post

2. Add a unique suffix to the image src to force browser downloading it again, like this:

   var img = new Image();
   img.src = "img.jpg?_="+(new Date().getTime());
   img.onload = function () {
       alert("image is loaded");
   }
   

In this code every time adding current timestamp to the end of the image URL you make it unique and browser will download the image again

From http://www.epochconverter.com/

SELECT DATEDIFF(s, '1970-01-01 00:00:00', GETUTCDATE())

My bad, SELECT unix_timestamp(time) Time format: YYYY-MM-DD HH:MM:SS or YYMMDD or YYYYMMDD. More on using timestamps with MySQL:

http://www.epochconverter.com/programming/mysql-from-unixtime.php

I've written a test script to evaluate the performance of the two most general solutions (meaning that the input does not have to be sorted beforehand and that the code does not depend on third party libraries), proposed by users shekhardtu (see answer) and FurkanO (see answer).

http://playcode.io/316025?tabs=console&script.js&output

FurkanO's solution seems to be the fastest.

/*_x000D_
** performance test for https://stackoverflow.com/questions/18017869/build-tree-array-from-flat-array-in-javascript_x000D_
*/_x000D_
_x000D_
// Data Set (e.g. nested comments)_x000D_
var comments = [{_x000D_
    id: 1,_x000D_
    parent_id: null_x000D_
}, {_x000D_
    id: 2,_x000D_
    parent_id: 1_x000D_
}, {_x000D_
    id: 3,_x000D_
    parent_id: 4_x000D_
}, {_x000D_
    id: 4,_x000D_
    parent_id: null_x000D_
}, {_x000D_
    id: 5,_x000D_
    parent_id: 4_x000D_
}];_x000D_
_x000D_
// add some random entries_x000D_
let maxParentId = 10000;_x000D_
for (let i=6; i<=maxParentId; i++)_x000D_
{_x000D_
  let randVal = Math.floor((Math.random() * maxParentId) + 1);_x000D_
  comments.push({_x000D_
    id: i,_x000D_
    parent_id: (randVal % 200 === 0 ? null : randVal)_x000D_
  });_x000D_
}_x000D_
_x000D_
// solution from user "shekhardtu" (https://stackoverflow.com/a/55241491/5135171)_x000D_
const nest = (items, id = null, link = 'parent_id') =>_x000D_
  items_x000D_
    .filter(item => item[link] === id)_x000D_
    .map(item => ({ ...item, children: nest(items, item.id) }));_x000D_
;_x000D_
_x000D_
// solution from user "FurkanO" (https://stackoverflow.com/a/40732240/5135171)_x000D_
const createDataTree = dataset => {_x000D_
    let hashTable = Object.create(null)_x000D_
    dataset.forEach( aData => hashTable[aData.id] = { ...aData, children : [] } )_x000D_
    let dataTree = []_x000D_
    dataset.forEach( aData => {_x000D_
      if( aData.parent_id ) hashTable[aData.parent_id].children.push(hashTable[aData.id])_x000D_
      else dataTree.push(hashTable[aData.id])_x000D_
    } )_x000D_
    return dataTree_x000D_
};_x000D_
_x000D_
_x000D_
/*_x000D_
** lets evaluate the timing for both methods_x000D_
*/_x000D_
let t0 = performance.now();_x000D_
let createDataTreeResult = createDataTree(comments);_x000D_
let t1 = performance.now();_x000D_
console.log("Call to createDataTree took " + Math.floor(t1 - t0) + " milliseconds.");_x000D_
_x000D_
t0 = performance.now();_x000D_
let nestResult = nest(comments);_x000D_
t1 = performance.now();_x000D_
console.log("Call to nest took " + Math.floor(t1 - t0) + " milliseconds.");_x000D_
_x000D_
_x000D_
_x000D_
_x000D_
//console.log(nestResult);_x000D_
//console.log(createDataTreeResult);_x000D_
_x000D_
// bad, but simple way of comparing object equality_x000D_
console.log(JSON.stringify(nestResult)===JSON.stringify(createDataTreeResult));

The one way is by using webservice, simply write a webservice method in PHP or any other language . And From your android app by using http client request and response , you can hit the web service method which will return whatever you want.

For PHP You can create a webservice like this. Assuming below we have a php file in the server. And the route of the file is yourdomain.com/api.php

if(isset($_GET['api_call'])){
    switch($_GET['api_call']){
       case 'userlogin':
           //perform your userlogin task here
       break; 
    }
}

Now you can use Volley or Retrofit to send a network request to the above PHP Script and then, actually the php script will handle the database operation.

In this case the PHP script is called a RESTful API.

You can learn all the operation at MySQL from this tutorial. Android MySQL Tutorial to Perform CRUD.

I prefer to use an extension method to get the scripts object:

public static IJavaScriptExecutor Scripts(this IWebDriver driver)
{
    return (IJavaScriptExecutor)driver;
}

Used as this:

driver.Scripts().ExecuteScript("some script");

A better solution is not to make your page dependable on zoom settings. If you set limits like the one you are proposing, you are limiting accessibility. If someone cannot read your text well, they just won't be able to change that. I would use proper CSS to make it look nice in any zoom.

If your really insist, take a look at this question on how to detect zoom level using JavaScript (nightmare!): How to detect page zoom level in all modern browsers?

Unfortunately none of the answers above worked for me.

I was looking to convert currency numbers from strings like $123,232,122.11 (1232332122.11) or USD 123,122.892 (123122.892) or any currency like ? 98,79,112.50 (9879112.5) to give me a number output including the decimal pointer.

Had to make my own regex which looks something like this:

str = str.match(/\d|\./g).join('');

The problem is that .form-control class renders like a DIV element which according to the normal-flow-of-the-page renders on a new line.

One way of fixing issues like this is to use display:inline property. So, create a custom CSS class with display:inline and attach it to your component with a .form-control class. You have to have a width for your component as well.

There are other ways of handling this issue (like arranging your form-control components inside any of the .col classes), but the easiest way is to just make your .form-control an inline element (the way a span would render)

A multidimensional array creates a nice linear memory layout while a jagged array implies several extra levels of indirection.

Looking up the value jagged[3][6] in a jagged array var jagged = new int[10][5] works like this: Look up the element at index 3 (which is an array) and look up the element at index 6 in that array (which is a value). For each dimension in this case, there's an additional look up (this is an expensive memory access pattern).

A multidimensional array is laid out linearly in memory, the actual value is found by multiplying together the indexes. However, given the array var mult = new int[10,30], the Length property of that multidimensional array returns the total number of elements i.e. 10 * 30 = 300.

The Rank property of a jagged array is always 1, but a multidimensional array can have any rank. The GetLength method of any array can be used to get the length of each dimension. For the multidimensional array in this example mult.GetLength(1) returns 30.

Indexing the multidimensional array is faster. e.g. given the multidimensional array in this example mult[1,7] = 30 * 1 + 7 = 37, get the element at that index 37. This is a better memory access pattern because only one memory location is involved, which is the base address of the array.

A multidimensional array therefore allocates a continuous memory block, while a jagged array does not have to be square, e.g. jagged[1].Length does not have to equal jagged[2].Length, which would be true for any multidimensional array.

Performance

Performance wise, multidimensional arrays should be faster. A lot faster, but due to a really bad CLR implementation they are not.

 23.084  16.634  15.215  15.489  14.407  13.691  14.695  14.398  14.551  14.252 
 25.782  27.484  25.711  20.844  19.607  20.349  25.861  26.214  19.677  20.171 
  5.050   5.085   6.412   5.225   5.100   5.751   6.650   5.222   6.770   5.305 

The first row are timings of jagged arrays, the second shows multidimensional arrays and the third, well that's how it should be. The program is shown below, FYI this was tested running mono. (The windows timings are vastly different, mostly due to the CLR implementation variations).

On windows, the timings of the jagged arrays are greatly superior, about the same as my own interpretation of what multidimensional array look up should be like, see 'Single()'. Sadly the windows JIT-compiler is really stupid, and this unfortunately makes these performance discussions difficult, there are too many inconsistencies.

These are the timings I got on windows, same deal here, the first row are jagged arrays, second multidimensional and third my own implementation of multidimensional, note how much slower this is on windows compared to mono.

  8.438   2.004   8.439   4.362   4.936   4.533   4.751   4.776   4.635   5.864
  7.414  13.196  11.940  11.832  11.675  11.811  11.812  12.964  11.885  11.751
 11.355  10.788  10.527  10.541  10.745  10.723  10.651  10.930  10.639  10.595

Source code:

using System;
using System.Diagnostics;
static class ArrayPref
{
    const string Format = "{0,7:0.000} ";
    static void Main()
    {
        Jagged();
        Multi();
        Single();
    }

    static void Jagged()
    {
        const int dim = 100;
        for(var passes = 0; passes < 10; passes++)
        {
            var timer = new Stopwatch();
            timer.Start();
            var jagged = new int[dim][][];
            for(var i = 0; i < dim; i++)
            {
                jagged[i] = new int[dim][];
                for(var j = 0; j < dim; j++)
                {
                    jagged[i][j] = new int[dim];
                    for(var k = 0; k < dim; k++)
                    {
                        jagged[i][j][k] = i * j * k;
                    }
                }
            }
            timer.Stop();
            Console.Write(Format,
                (double)timer.ElapsedTicks/TimeSpan.TicksPerMillisecond);
        }
        Console.WriteLine();
    }

    static void Multi()
    {
        const int dim = 100;
        for(var passes = 0; passes < 10; passes++)
        {
            var timer = new Stopwatch();
            timer.Start();
            var multi = new int[dim,dim,dim];
            for(var i = 0; i < dim; i++)
            {
                for(var j = 0; j < dim; j++)
                {
                    for(var k = 0; k < dim; k++)
                    {
                        multi[i,j,k] = i * j * k;
                    }
                }
            }
            timer.Stop();
            Console.Write(Format,
                (double)timer.ElapsedTicks/TimeSpan.TicksPerMillisecond);
        }
        Console.WriteLine();
    }

    static void Single()
    {
        const int dim = 100;
        for(var passes = 0; passes < 10; passes++)
        {
            var timer = new Stopwatch();
            timer.Start();
            var single = new int[dim*dim*dim];
            for(var i = 0; i < dim; i++)
            {
                for(var j = 0; j < dim; j++)
                {
                    for(var k = 0; k < dim; k++)
                    {
                        single[i*dim*dim+j*dim+k] = i * j * k;
                    }
                }
            }
            timer.Stop();
            Console.Write(Format,
                (double)timer.ElapsedTicks/TimeSpan.TicksPerMillisecond);
        }
        Console.WriteLine();
    }
}

Thanks,Bruno for giving me heads up on Common Name and Subject Alternative Name. As we figured out certificate was generated with CN with DNS name of network and asked for regeneration of new certificate with Subject Alternative Name entry i.e. san=ip:10.0.0.1. which is the actual solution.

But, we managed to find out a workaround with which we can able to run on development phase. Just add a static block in the class from which we are making ssl connection.

static {
    HttpsURLConnection.setDefaultHostnameVerifier(new HostnameVerifier()
        {
            public boolean verify(String hostname, SSLSession session)
            {
                // ip address of the service URL(like.23.28.244.244)
                if (hostname.equals("23.28.244.244"))
                    return true;
                return false;
            }
        });
}

If you happen to be using Java 8, there is a much slicker way of achieving the same result:

static {
    HttpsURLConnection.setDefaultHostnameVerifier((hostname, session) -> hostname.equals("127.0.0.1"));
}

At times, if we forget the

return self.cleaned_data 

in the clean function of django forms, we will not have any data though the form.is_valid() will return True.

In fact, if there is no definition of background-color under some element, Chrome will output its background-color as rgba(0, 0, 0, 0), while Firefox outputs is transparent.

In terms of comparing two numpy arrays and counting the number of matches (e.g. correct class prediction in machine learning), I found the below example for two dimensions useful:

import numpy as np
result = np.random.randint(3,size=(5,2)) # 5x2 random integer array
target = np.random.randint(3,size=(5,2)) # 5x2 random integer array

res = np.equal(result,target)
print result
print target
print np.sum(res[:,0])
print np.sum(res[:,1])

which can be extended to D dimensions.

The results are:

Prediction:

[[1 2]
 [2 0]
 [2 0]
 [1 2]
 [1 2]]

Target:

[[0 1]
 [1 0]
 [2 0]
 [0 0]
 [2 1]]

Count of correct prediction for D=1: 1

Count of correct prediction for D=2: 2

As far as I understand, it is going to drop your database and re-create it based on your db/schema.rb file. That is why you need to make sure that your schema.rb file is always up to date and under version control.

If you want a method other than findcontrol try the following:

 GridViewRow row = Gridview1.SelectedRow;
 int CustomerId = int.parse(row.Cells[0].Text);// to get the column value
 CheckBox checkbox1= row.Cells[0].Controls[0] as CheckBox; // you can access the controls like this

An example of this exception being thrown is: When you are trying to check something, that is null.

For example:

string testString = null; //Because it doesn't have a value (i.e. it's null; "Length" cannot do what it needs to do)

if (testString.Length == 0) // Throws a nullreferenceexception
{
    //Do something
} 

The .NET runtime will throw a NullReferenceException when you attempt to perform an action on something which hasn't been instantiated i.e. the code above.

In comparison to an ArgumentNullException which is typically thrown as a defensive measure if a method expects that what is being passed to it is not null.

More information is in C# NullReferenceException and Null Parameter.

Well! I observer Heroku is famous in budding and newly born developers while AWS has advanced developer persona. DigitalOcean is also a major player in this ground. Cloudways has made it much easy to create Lamp stack in a click on DigitalOcean and AWS. Having all services and packages updates in a click is far better than doing all thing manually.

You can check out completely here: https://www.cloudways.com/blog/host-php-on-aws-cloud/

I was facing the same problem so what I did I dropped the field for the primary key then I recreated it and made sure that it is auto incremental . That worked for me . I hope it helps others

Since the methods used in other answers seems quite complicated for such easy task, here is a new answer:

Instead of a ListedColormap, which produces a discrete colormap, you may use a LinearSegmentedColormap. This can easily be created from a list using the from_list method.

import numpy as np
import matplotlib.pyplot as plt
import matplotlib.colors

x,y,c = zip(*np.random.rand(30,3)*4-2)

norm=plt.Normalize(-2,2)
cmap = matplotlib.colors.LinearSegmentedColormap.from_list("", ["red","violet","blue"])

plt.scatter(x,y,c=c, cmap=cmap, norm=norm)
plt.colorbar()
plt.show()

More generally, if you have a list of values (e.g. [-2., -1, 2]) and corresponding colors, (e.g. ["red","violet","blue"]), such that the nth value should correspond to the nth color, you can normalize the values and supply them as tuples to the from_list method.

import numpy as np
import matplotlib.pyplot as plt
import matplotlib.colors

x,y,c = zip(*np.random.rand(30,3)*4-2)

cvals  = [-2., -1, 2]
colors = ["red","violet","blue"]

norm=plt.Normalize(min(cvals),max(cvals))
tuples = list(zip(map(norm,cvals), colors))
cmap = matplotlib.colors.LinearSegmentedColormap.from_list("", tuples)

plt.scatter(x,y,c=c, cmap=cmap, norm=norm)
plt.colorbar()
plt.show()

array_values does the job :

$myArray  = array_values($myArray);

Also some other php function do not preserve the keys, i.e. reset the index.

The RSACryptoServiceProvider(CspParameters) constructor creates a keypair which is stored in the keystore on the local machine. If you already have a keypair with the specified name, it uses the existing keypair.

It sounds as if you are not interested in having the key stored on the machine.

So use the RSACryptoServiceProvider(Int32) constructor:

public static void AssignNewKey(){
    RSA rsa = new RSACryptoServiceProvider(2048); // Generate a new 2048 bit RSA key

    string publicPrivateKeyXML = rsa.ToXmlString(true);
    string publicOnlyKeyXML = rsa.ToXmlString(false);
    // do stuff with keys...
}

EDIT:

Alternatively try setting the PersistKeyInCsp to false:

public static void AssignNewKey(){
    const int PROVIDER_RSA_FULL = 1;
    const string CONTAINER_NAME = "KeyContainer";
    CspParameters cspParams;
    cspParams = new CspParameters(PROVIDER_RSA_FULL);
    cspParams.KeyContainerName = CONTAINER_NAME;
    cspParams.Flags = CspProviderFlags.UseMachineKeyStore;
    cspParams.ProviderName = "Microsoft Strong Cryptographic Provider";
    rsa = new RSACryptoServiceProvider(cspParams);

    rsa.PersistKeyInCsp = false;

    string publicPrivateKeyXML = rsa.ToXmlString(true);
    string publicOnlyKeyXML = rsa.ToXmlString(false);
    // do stuff with keys...
}

I am using MVC4, I used following approach to redirect a custom html screen upon authorization breach.

Extend AuthorizeAttribute say CutomAuthorizer override the OnAuthorization and HandleUnauthorizedRequest

Register the CustomAuthorizer in the RegisterGlobalFilters.

public static void RegisterGlobalFilters(GlobalFilterCollection filters)
{

    filters.Add(new CustomAuthorizer());
}

upon identifying the unAuthorized access call HandleUnauthorizedRequestand redirect to the concerned controller action as shown below.

public class CustomAuthorizer : AuthorizeAttribute
{

    public override void OnAuthorization(AuthorizationContext filterContext)
    {
        bool isAuthorized = IsAuthorized(filterContext); // check authorization
        base.OnAuthorization(filterContext);
        if (!isAuthorized && !filterContext.ActionDescriptor.ActionName.Equals("Unauthorized", StringComparison.InvariantCultureIgnoreCase)
            && !filterContext.ActionDescriptor.ControllerDescriptor.ControllerName.Equals("LogOn", StringComparison.InvariantCultureIgnoreCase))
        {

            HandleUnauthorizedRequest(filterContext);

        }
    }

    protected override void HandleUnauthorizedRequest(AuthorizationContext filterContext)
    {
        filterContext.Result =
       new RedirectToRouteResult(
           new RouteValueDictionary{{ "controller", "LogOn" },
                                          { "action", "Unauthorized" }

                                         });

    }
}

This code snippet:

int& func1()
{
    int i;
    i = 1;
    return i;
}

will not work because you're returning an alias (a reference) to an object with a lifetime limited to the scope of the function call. That means once func1() returns, int i dies, making the reference returned from the function worthless because it now refers to an object that doesn't exist.

int main()
{
    int& p = func1();
    /* p is garbage */
}

The second version does work because the variable is allocated on the free store, which is not bound to the lifetime of the function call. However, you are responsible for deleteing the allocated int.

int* func2()
{
    int* p;
    p = new int;
    *p = 1;
    return p;
}

int main()
{
    int* p = func2();
    /* pointee still exists */
    delete p; // get rid of it
}

Typically you would wrap the pointer in some RAII class and/or a factory function so you don't have to delete it yourself.

In either case, you can just return the value itself (although I realize the example you provided was probably contrived):

int func3()
{
    return 1;
}

int main()
{
    int v = func3();
    // do whatever you want with the returned value
}

Note that it's perfectly fine to return big objects the same way func3() returns primitive values because just about every compiler nowadays implements some form of return value optimization:

class big_object 
{ 
public:
    big_object(/* constructor arguments */);
    ~big_object();
    big_object(const big_object& rhs);
    big_object& operator=(const big_object& rhs);
    /* public methods */
private:
    /* data members */
};

big_object func4()
{
    return big_object(/* constructor arguments */);
}

int main()
{
     // no copy is actually made, if your compiler supports RVO
    big_object o = func4();    
}

Interestingly, binding a temporary to a const reference is perfectly legal C++.

int main()
{
    // This works! The returned temporary will last as long as the reference exists
    const big_object& o = func4();    
    // This does *not* work! It's not legal C++ because reference is not const.
    // big_object& o = func4();  
}

For a use case like this, it may be useful to use a string constant so it can be marshaled into a JSON string. In the following example, []Base{A,C,G,T} would get marshaled to ["adenine","cytosine","guanine","thymine"].

type Base string

const (
    A Base = "adenine"
    C      = "cytosine"
    G      = "guanine"
    T      = "thymine"
)

When using iota, the values get marshaled into integers. In the following example, []Base{A,C,G,T} would get marshaled to [0,1,2,3].

type Base int

const (
    A Base = iota
    C
    G
    T
)

Here's an example comparing both approaches:

https://play.golang.org/p/VvkcWvv-Tvj

try this code

import serial.tools.list_ports
for i in serial.tools.list_ports.comports():
    print(i) 

it returns

COM1 - Port de communication (COM1)
COM5 - USB-SERIAL CH340 (COM5)

if you just wont the name of the port for exemple COM1

import serial.tools.list_ports
for i in serial.tools.list_ports.comports():
    print(str(i).split(" ")[0])

it returns

COM1
COM5

as in my case py 3.7 64bits

Try

button.semanticContentAttribute = UISemanticContentAttributeForceRightToLeft;

I think, it should be like this:

    class foo():
        input = get_input(__qualname__)

You can set this programmatically in the controller:-

HttpContext.Current.Server.ScriptTimeout = 300;

Sets the timeout to 5 minutes instead of the default 110 seconds (what an odd default?)

Take out the MONTHS from your case, and remove the brackets... like this:

CASE 
    WHEN RATE_DATE BETWEEN '2010-01-01' AND '2010-01-31' THEN 'JANUARY'
    ELSE 'NOTHING'
END AS 'MONTHS'

You can think of this as being equivalent to:

CASE TRUE
    WHEN RATE_DATE BETWEEN '2010-01-01' AND '2010-01-31' THEN 'JANUARY'
    ELSE 'NOTHING'
END AS 'MONTHS'

use - !important - to override default black

.fa-heart:hover{_x000D_
   color:red !important;_x000D_
}_x000D_
.fa-heart-o:hover{_x000D_
   color:red !important;_x000D_
}

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">_x000D_
_x000D_
<i class="fa fa-heart fa-2x"></i>_x000D_
<i class="fa fa-heart-o fa-2x"></i>

Try This one. It will generate id according to your wish.

function id()
{
 // add limit
$id_length = 20;

// add any character / digit
$alfa = "abcdefghijklmnopqrstuvwxyz1234567890";
$token = "";
for($i = 1; $i < $id_length; $i ++) {

  // generate randomly within given character/digits
  @$token .= $alfa[rand(1, strlen($alfa))];

}    
return $token;
}

matrix multiplication, see the following example:

> A <- matrix (c(1,3,4, 5,8,9, 1,3,3), 3,3)
> A
     [,1] [,2] [,3]
[1,]    1    5    1
[2,]    3    8    3
[3,]    4    9    3
> 
> B <- matrix (c(2,4,5, 8,9,2, 3,4,5), 3,3)
> 
> B
     [,1] [,2] [,3]
[1,]    2    8    3
[2,]    4    9    4
[3,]    5    2    5
> 
> 
> A %*% B
     [,1] [,2] [,3]
[1,]   27   55   28
[2,]   53  102   56
[3,]   59  119   63

> B %*% A
     [,1] [,2] [,3]
[1,]   38  101   35
[2,]   47  128   43
[3,]   31   86   26

Also see:

http://en.wikipedia.org/wiki/Matrix_multiplication

If this does not follow the size of matrix rule you will get the error:

> A <- matrix(c(1,2,3,4,5,6), 3,2)
    > A
     [,1] [,2]
[1,]    1    4
[2,]    2    5
[3,]    3    6

> B <- matrix (c(3,1,3,4,4,4,4,4,3), 3,3)

> B
         [,1] [,2] [,3]
    [1,]    3    4    4
    [2,]    1    4    4
    [3,]    3    4    3
    > A%*%B
    Error in A %*% B : non-conformable arguments

make sure the submit button is not of type "submit", make it a button. Then use the onclick event to trigger some javascript. There you can do whatever you want before you actually post your data.

Works for all current browsers

Use toLocaleString to format a currency in it's language-sensitive representation (using ISO 4217 currency codes).

(2500).toLocaleString("en-GB", {style: "currency", currency: "GBP", minimumFractionDigits: 2}) 

Example South African Rand code snippets for @avenmore

console.log((2500).toLocaleString("en-ZA", {style: "currency", currency: "ZAR", minimumFractionDigits: 2}))_x000D_
// -> R 2 500,00_x000D_
console.log((2500).toLocaleString("en-GB", {style: "currency", currency: "ZAR", minimumFractionDigits: 2}))_x000D_
// -> ZAR 2,500.00

I also faced the same issue. It happened to me after I upgraded my numpy library. It was resolved in my case by upgrading my pandas library as well after upgrading my numpy library using the below command:

pip install --upgrade pandas

I don't know if Boost has more specific functions, but you can do it with the standard library.

Given std::vector<double> v, this is the naive way:

#include <numeric>

double sum = std::accumulate(v.begin(), v.end(), 0.0);
double mean = sum / v.size();

double sq_sum = std::inner_product(v.begin(), v.end(), v.begin(), 0.0);
double stdev = std::sqrt(sq_sum / v.size() - mean * mean);

This is susceptible to overflow or underflow for huge or tiny values. A slightly better way to calculate the standard deviation is:

double sum = std::accumulate(v.begin(), v.end(), 0.0);
double mean = sum / v.size();

std::vector<double> diff(v.size());
std::transform(v.begin(), v.end(), diff.begin(),
               std::bind2nd(std::minus<double>(), mean));
double sq_sum = std::inner_product(diff.begin(), diff.end(), diff.begin(), 0.0);
double stdev = std::sqrt(sq_sum / v.size());

UPDATE for C++11:

The call to std::transform can be written using a lambda function instead of std::minus and std::bind2nd(now deprecated):

std::transform(v.begin(), v.end(), diff.begin(), [mean](double x) { return x - mean; });

The selector returns an array of jQuery objects. If no matching elements are found, it returns an empty array. You can check the .length of the collection returned by the selector or check whether the first array element is 'undefined'.

You can use any the following examples inside an IF statement and they all produce the same result. True, if the selector found a matching element, false otherwise.

$('#notAnElement').length > 0
$('#notAnElement').get(0) !== undefined
$('#notAnElement')[0] !== undefined

If you get your string from stdin().read_line, you have to trim it first.

let my_num: i32 = my_num.trim().parse()
   .expect("please give me correct string number!");

The key difference: NSMutableDictionary can be modified in place, NSDictionary cannot. This is true for all the other NSMutable* classes in Cocoa. NSMutableDictionary is a subclass of NSDictionary, so everything you can do with NSDictionary you can do with both. However, NSMutableDictionary also adds complementary methods to modify things in place, such as the method setObject:forKey:.

You can convert between the two like this:

NSMutableDictionary *mutable = [[dict mutableCopy] autorelease];
NSDictionary *dict = [[mutable copy] autorelease]; 

Presumably you want to store data by writing it to a file. NSDictionary has a method to do this (which also works with NSMutableDictionary):

BOOL success = [dict writeToFile:@"/file/path" atomically:YES];

To read a dictionary from a file, there's a corresponding method:

NSDictionary *dict = [NSDictionary dictionaryWithContentsOfFile:@"/file/path"];

If you want to read the file as an NSMutableDictionary, simply use:

NSMutableDictionary *dict = [NSMutableDictionary dictionaryWithContentsOfFile:@"/file/path"];

var.connectionstring = "server=localhost; database=dbname; integrated security=yes"

or

var.connectionstring = "server=localhost; database=dbname; login=yourlogin; pwd=yourpass"

We had the same issue with our ClickOnce application that uses Interop with Microsoft Office. It happened only on a few computers in the company.

The best fix we found out was to modify MS Office installation on problematic computers (through the Programs and Features panel) and ensure that ".NET programmability feature" (not sure of the name of the component - our Microsoft_Office versions are not English) was installed for each of the MS Office applications (Excel, Word, Outlook, etc.). This seems to not be included in a default install.

Then the problem with stdole.dll was fixed.

I hope this might help.

Here's what you can do for say yyyy-mm-dd comparison:

GregorianCalendar gc= new GregorianCalendar();
gc.setTimeInMillis(System.currentTimeMillis());
gc.roll(GregorianCalendar.DAY_OF_MONTH, true);

Date d1 = new Date();
Date d2 = gc.getTime();

SimpleDateFormat sf= new SimpleDateFormat("yyyy-MM-dd");

if(sf.format(d2).hashCode() < sf.format(d1).hashCode())
{
    System.out.println("date 2 is less than date 1");
}
else
{
    System.out.println("date 2 is equal or greater than date 1");
}

I had a similar problem running SciPy on my computer. There are two ways to fix this problem: 1. Yes you do need to cd into your python directory. 2. Sometimes you have to tell the computer explicitly what path to go through, you have to find the program you're using, open up the properties, and reroute the path it takes to run. 3. consult the manual: http://matplotlib.org/users/installing.html or http://www.scipy.org/install.html

the Scipy package is very finicky, and needs things spelled out in obnoxious detail.

$date = '2009-10-22';
$sepparator = '-';
$parts = explode($sepparator, $date);
$dayForDate = date("l", mktime(0, 0, 0, $parts[1], $parts[2], $parts[0]));

The problem is that varargs got introduced in Java5 and unfortunately, Arrays.asList() got overloaded with a vararg version too. So Arrays.asList(spam) is understood by the Java5 compiler as a vararg parameter of int arrays.

This problem is explained in more details in Effective Java 2nd Ed., Chapter 7, Item 42.

If you want to change the size of plot the use arg figsize

df.groupby(['NFF', 'ABUSE']).size().unstack()
      .plot(kind='bar', stacked=True, figsize=(15, 5))

I was able to workaround/hack this problem by moving in to "Classic" mode from "integrated" mode.

an alternative would be to do something like:

SELECT
   CAST(P0.seconds as bigint) as seconds
FROM
   (
   SELECT
      seconds
   FROM
      TableName
   WHERE
      ISNUMERIC(seconds) = 1
   ) P0

You are calling the constructor of its base class, demo.

Take a look at "using WCF Services with PHP". It explains the basics of what you need.

As a theory summary:

WCF or Windows Communication Foundation is a technology that allow to define services abstracted from the way - the underlying communication method - they'll be invoked.

The idea is that you define a contract about what the service does and what the service offers and also define another contract about which communication method is used to actually consume the service, be it TCP, HTTP or SOAP.

You have the first part of the article here, explaining how to create a very basic WCF Service.

More resources:

Using WCF with PHP5.

Aslo take a look to NuSOAP. If you now NuSphere this is a toolkit to let you connect from PHP to an WCF service.

Non-Unicode string data types:
Use STR for text file and VARCHAR for SQL Server columns.

Unicode string data types:
Use W_STR for text file and NVARCHAR for SQL Server columns.

The problem is that your data types do not match, so there could be a loss of data during the conversion.

This solution is based on @FernandoEcheverria's and @GuilhermeMeireles's solution, but it is more concise and works with the popstate mechanisms that the Angular Router provides. This allows for storing and restoring the scroll level of multiple consecutive navigations.

We store the scroll positions for each navigation state in a map scrollLevels. Once there is a popstate event, the ID of the state that is about to be restored is supplied by the Angular Router: event.restoredState.navigationId. This is then used to get the last scroll level of that state from scrollLevels.

If there is no stored scroll level for the route, it will scroll to the top as you would expect.

import { Component, OnInit } from '@angular/core';
import { Router, NavigationStart, NavigationEnd } from '@angular/router';

@Component({
    selector: 'my-app',
    template: '<ng-content></ng-content>',
})
export class AppComponent implements OnInit {

  constructor(private router: Router) { }

  ngOnInit() {
    const scrollLevels: { [navigationId: number]: number } = {};
    let lastId = 0;
    let restoredId: number;

    this.router.events.subscribe((event: Event) => {

      if (event instanceof NavigationStart) {
        scrollLevels[lastId] = window.scrollY;
        lastId = event.id;
        restoredId = event.restoredState ? event.restoredState.navigationId : undefined;
      }

      if (event instanceof NavigationEnd) {
        if (restoredId) {
          // Optional: Wrap a timeout around the next line to wait for
          // the component to finish loading
          window.scrollTo(0, scrollLevels[restoredId] || 0);
        } else {
          window.scrollTo(0, 0);
        }
      }

    });
  }

}

I came across this question as I had exact same problem. Although accepted answer works good but with matplotlib version 2.1.0, it is pretty straight forward to have two scatter plots in one plot without using a reference to Axes

import matplotlib.pyplot as plt

plt.scatter(x,y, c='b', marker='x', label='1')
plt.scatter(x, y, c='r', marker='s', label='-1')
plt.legend(loc='upper left')
plt.show()

I think another way to do it is to use in-line css, just add your background-color in the html code

<div class="jumbotron" style="background-color:blue;">
    <h3>Piece of text</h3>
</div>

What is polymorphism?

Polymorphism is the ability to:

• Invoke an operation on an instance of a specialized type by only knowing its generalized type while calling the method of the specialized type and not that of the generalized type: it is dynamic polymorphism.

• Define several methods having the save name but having differents parameters: it is static polymorphism.

The first if the historical definition and the most important.

What is polymorphism used for?

It allows to create strongly-typed consistency of the class hierarchy and to do some magical things like managing lists of objects of differents types without knowing their types but only one of their parent type, as well as data bindings.

Strong and weak typing

Sample

Here are some Shapes like Point, Line, Rectangle and Circle having the operation Draw() taking either nothing or either a parameter to set a timeout to erase it.

public class Shape
{
 public virtual void Draw()
 {
   DoNothing();
 }
 public virtual void Draw(int timeout)
 {
   DoNothing();
 }
}

public class Point : Shape
{
 int X, Y;
 public override void Draw()
 {
   DrawThePoint();
 }
}

public class Line : Point
{
 int Xend, Yend;
 public override Draw()
 {
   DrawTheLine();
 }
}

public class Rectangle : Line
{
 public override Draw()
 {
   DrawTheRectangle();
 }
}

var shapes = new List<Shape> { new Point(0,0), new Line(0,0,10,10), new rectangle(50,50,100,100) };

foreach ( var shape in shapes )
  shape.Draw();

Here the Shape class and the Shape.Draw() methods should be marked as abstract.

They are not for to make understand.

Explaination

Without polymorphism, using abstract-virtual-override, while parsing the shapes, it is only the Spahe.Draw() method that is called as the CLR don't know what method to call. So it call the method of the type we act on, and here the type is Shape because of the list declaration. So the code do nothing at all.

With polymorphism, the CLR is able to infer the real type of the object we act on using what is called a virtual table. So it call the good method, and here calling Shape.Draw() if Shape is Point calls the Point.Draw(). So the code draws the shapes.

More readings

C# - Polymorphism (Level 1)

Polymorphism in Java (Level 2)

Polymorphism (C# Programming Guide)

Virtual method table

Using T-SQL: My job is executing stored procedure. You can easy change @command to run your sql.

EXEC msdb.dbo.sp_add_job  
   @job_name = N'MakeDailyJob',   
   @enabled = 1,   
   @description = N'Procedure execution every day' ; 

 EXEC msdb.dbo.sp_add_jobstep  
    @job_name = N'MakeDailyJob',   
    @step_name = N'Run Procedure',   
    @subsystem = N'TSQL',   
    @command = 'exec BackupFromConfig';

 EXEC msdb.dbo.sp_add_schedule  
    @schedule_name = N'Everyday schedule',   
    @freq_type = 4,  -- daily start
    @freq_interval = 1,
    @active_start_time = '230000' ;   -- start time 23:00:00

 EXEC msdb.dbo.sp_attach_schedule  
   @job_name = N'MakeDailyJob',  
   @schedule_name = N'Everyday schedule' ;

 EXEC msdb.dbo.sp_add_jobserver  
   @job_name = N'MakeDailyJob',  
   @server_name = @@servername ;

Those are not files (they don't exist on disk) - they are just names under which some HTTP handlers are registered. Take a look at the web.config in .NET Framework's directory (e.g. C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\web.config):

<configuration>
  <system.web>
    <httpHandlers>
      <add path="eurl.axd" verb="*" type="System.Web.HttpNotFoundHandler" validate="True" />
      <add path="trace.axd" verb="*" type="System.Web.Handlers.TraceHandler" validate="True" />
      <add path="WebResource.axd" verb="GET" type="System.Web.Handlers.AssemblyResourceLoader" validate="True" />
      <add verb="*" path="*_AppService.axd" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="False" />
      <add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="False"/>
      <add path="*.axd" verb="*" type="System.Web.HttpNotFoundHandler" validate="True" />
    </httpHandlers>
  </system.web>
<configuration>

You can register your own handlers with a whatever.axd name in your application's web.config. While you can bind your handlers to whatever names you like, .axd has the upside of working on IIS6 out of the box by default (IIS6 passes requests for *.axd to the ASP.NET runtime by default). Using an arbitrary path for the handler, like Document.pdf (or really anything except ASP.NET-specific extensions), requires more configuration work. In IIS7 in integrated pipeline mode this is no longer a problem, as all requests are processed by the ASP.NET stack.

If you use the enumerable mixin (as Rails does) you can do something similar to the php snippet listed. Just use the each_slice method and flatten the hash.

require 'enumerator' 

['a',1,'b',2].to_a.flatten.each_slice(2) {|x,y| puts "#{x} => #{y}" }

# is equivalent to...

{'a'=>1,'b'=>2}.to_a.flatten.each_slice(2) {|x,y| puts "#{x} => #{y}" }

Less monkey-patching required.

However, this does cause problems when you have a recursive array or a hash with array values. In ruby 1.9 this problem is solved with a parameter to the flatten method that specifies how deep to recurse.

# Ruby 1.8
[1,2,[1,2,3]].flatten
=> [1,2,1,2,3]

# Ruby 1.9
[1,2,[1,2,3]].flatten(0)
=> [1,2,[1,2,3]]

As for the question of whether this is a code smell, I'm not sure. Usually when I have to bend over backwards to iterate over something I step back and realize I'm attacking the problem wrong.

For the case that you wish to revert a recently installed package that made several changes to dependencies (such as tensorflow), you can "roll back" to an earlier installation state via the following method:

conda list --revisions
conda install --revision [revision number]

The first command shows previous installation revisions (with dependencies) and the second reverts to whichever revision number you specify.

Note that if you wish to (re)install a later revision, you may have to sequentially reinstall all intermediate versions. If you had been at revision 23, reinstalled revision 20 and wish to return, you may have to run each:

conda install --revision 21
conda install --revision 22
conda install --revision 23

You can use the command pkill to kill processes. If you want to "play around", you can use "pgrep", which works exactly the same but returns the process rather than killing it.

pkill has the -f parameter that allows you to match against the entire command. So for your example, you can: pkill -f "gedit file.txt"

Personally, I use that:

    final Spinner spinner = (Spinner) (view.findViewById(R.id.userList));
    spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {                

            userSelectedIndex = position;
        }

        @Override
        public void onNothingSelected(AdapterView<?> parent) {
        }
    });  

You should add the pipe to the interpolation and not to the ngFor

ul
  li(*ngFor='let movie of (movies)') ///////////removed here///////////////////
    | {{ movie.title | async }}

Reference docs

Multithreading Multithreading extends the idea of multitasking into applications, so you can subdivide specific operations within a single application into individual threads.

1. Add injectable decorator to component2(or any component which have the method)

@Injectable({
    providedIn: 'root'
})

2. Inject into component1 (the component from where component2 method will be called)

constructor(public comp2 : component2) { }

3. Define method in component1 from where component2 method is called

method1()
{
    this.comp2.method2();
}

component 1 and component 2 code below.

import {Component2} from './Component2';

@Component({
  selector: 'sel-comp1',
  templateUrl: './comp1.html',
  styleUrls: ['./comp1.scss']
})
export class Component1 implements OnInit {
  show = false;
  constructor(public comp2: Component2) { }
method1()
 {
   this.comp2.method2(); 
  }
}


@Component({
  selector: 'sel-comp2',
  templateUrl: './comp2.html',
  styleUrls: ['./comp2.scss']
})
export class Component2 implements OnInit {
  method2()
{
  alert('called comp2 method from comp1');
}

First start with Joran's excellent answer -- doubtful anything can better that.

Then the following mnemonics may help to remember the distinctions between each. Whilst some are obvious, others may be less so --- for these you'll find justification in Joran's discussions.

Mnemonics

• lapply is a list apply which acts on a list or vector and returns a list.
• sapply is a simple lapply (function defaults to returning a vector or matrix when possible)
• vapply is a verified apply (allows the return object type to be prespecified)
• rapply is a recursive apply for nested lists, i.e. lists within lists
• tapply is a tagged apply where the tags identify the subsets
• apply is generic: applies a function to a matrix's rows or columns (or, more generally, to dimensions of an array)

Building the Right Background

If using the apply family still feels a bit alien to you, then it might be that you're missing a key point of view.

These two articles can help. They provide the necessary background to motivate the functional programming techniques that are being provided by the apply family of functions.

Users of Lisp will recognise the paradigm immediately. If you're not familiar with Lisp, once you get your head around FP, you'll have gained a powerful point of view for use in R -- and apply will make a lot more sense.

• Advanced R: Functional Programming, by Hadley Wickham
• Simple Functional Programming in R, by Michael Barton

I experienced that the javascript: hrefs did not work when the page was embedded in Outlook's webpage feature where a mail folder is set to instead show an url

This is a bit old, but I guess what you want is: ps -o pid -C PROCESS_NAME, for example:

ps -o pid -C bash

EDIT: Dependening on the sort of output you expect, pgrep would be more elegant. This, in my knowledge, is Linux specific and result in similar output as above. For example:

pgrep bash

In my case i created below queries but in the first query if id 1 is already exists and age is already there, after that if you create first query without age than the value of age will be none

REPLACE into table SET `id` = 1, `name` = 'A', `age` = 19

for avoiding above issue create query like below

INSERT INTO table SET `id` = '1', `name` = 'A', `age` = 19 ON DUPLICATE KEY UPDATE `id` = "1", `name` = "A",`age` = 19

may it will help you ...

This can be done with just one line of code using just Dot Net. Below is sample code copied from MSDN

Step 1: Add a reference to System.IO.Compression.FileSystem

Step 2: Follow the code below

        static void Main(string[] args)
        {
            string startPath = @"c:\example\start";
            string zipPath = @"c:\example\result.zip";
            string extractPath = @"c:\example\extract";

            ZipFile.CreateFromDirectory(startPath, zipPath);

            ZipFile.ExtractToDirectory(zipPath, extractPath);
        }

You need to put the CTE first and then combine the INSERT INTO with your select statement. Also, the "AS" keyword following the CTE's name is not optional:

WITH tab AS (
    bla bla
)
INSERT INTO dbo.prf_BatchItemAdditionalAPartyNos (
BatchID,
AccountNo,
APartyNo,
SourceRowID
)  
SELECT * FROM tab

Please note that the code assumes that the CTE will return exactly four fields and that those fields are matching in order and type with those specified in the INSERT statement. If that is not the case, just replace the "SELECT *" with a specific select of the fields that you require.

As for your question on using a function, I would say "it depends". If you are putting the data in a table just because of performance reasons, and the speed is acceptable when using it through a function, then I'd consider function to be an option. On the other hand, if you need to use the result of the CTE in several different queries, and speed is already an issue, I'd go for a table (either regular, or temp).

WITH common_table_expression (Transact-SQL)

Multiply values with -1 and use max heap to get the effect of min heap

Stopping (Killing) a thread mid-way is not recommended. The API is actually deprecated.

However,you can get more details including workarounds here: How do you kill a thread in Java?

I have the same issue using SpringSource Tool Suite. I was importing an existing Maven project which ran fine from the command line. However, when I imported the project using import -> Maven -> existing Maven project, the project did not import correctly import and I could not add the maven managed dependencies library to the build path.

If I ran mvn install from the command line the project built successfully. If I ran mvn eclipse:eclipse and then imported into STS, then everything worked as expected, except of course I'd have to re-run this every time I updated the pom, which was undesirable.

I worked around it by running mvn eclipse:eclipse and then manually updating .classpath to eliminate the M2_REPO dependencies added by eclipse:eclipse and adding the m2eclipse dependency entry:

<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
  <attributes>
    <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
  </attributes>
</classpathentry>

Then I imported existing Maven project and it worked as expected.

This is a hack and I'm not sure what other consequences running eclipse:ecplise has when working with m2eclipse. But it did at least allow me to get my project compiling so I could get to coding.

EDIT 1/4/2013

The workaround I posted above will work temporarily, and I never discovered any negative side effects. However, I've had this issue a few times now and each time the problem is that there is some section of the pom that maven accepts but m2eclipse barfs on.

So I recommend removing parts of the pom 1 by 1 until you can mavenize the project successfully. Just keep running maven -> update configuration after each pom edit until it works as it should. I usually start by removing the plugin configuration tag blocks one at a time, starting with the most suspicious (i.e. most complicated).

Once it mavenizes properly, you can revert the pom and it should still work as expected.

After I get running, I'd research the offending configuration(s) to try to figure out what the 'proper' fix is (according to m2eclipse, anyway).

Hopefully this approach leads to the permanent solution instead of settling for a hacky workaround!

Use WinSCP for file transfer over SSH, putty is only for SSH commands.

An add-on to the previous answers since I came across this concern:

If you really want to insert something like 24-May-2005 to your DATE column, you could do something like this:

INSERT INTO someTable(Empid,Date_Joined)
VALUES
    ('S710',STR_TO_DATE('24-May-2005', '%d-%M-%Y'));

In the above query please note that if it's May(ie: the month in letters) the format should be %M.

NOTE: I tried this with the latest MySQL version 8.0 and it works!

A reference is really a pointer with enough sugar to make it taste nice... ;)

But it also uses a different syntax to pointers, which makes it a bit easier to use references than pointers. Because of this, we don't need & when calling the function that takes the pointer - the compiler deals with that for you. And you don't need * to get the content of a reference.

To call a reference an alias is a pretty accurate description - it is "another name for the same thing". So when a is passed as a reference, we're really passing a, not a copy of a - it is done (internally) by passing the address of a, but you don't need to worry about how that works [unless you are writing your own compiler, but then there are lots of other fun things you need to know when writing your own compiler, that you don't need to worry about when you are just programming].

Note that references work the same way for int or a class type.

The precompiled binaries on http://www.lfd.uci.edu/~gohlke/pythonlibs/#mysql-python is just worked for me.

1. Open MySQL_python-1.2.5-cp27-none-win_amd64.whl file with zip extractor program.
2. Copy the contents to C:\Python27\Lib\site-packages\

I think the best example would be using services. Let's say that I want to grab data from my server when my component gets 'Activated'. Let's say that I also want to do some additional things to the data after I get it from the server, maybe I get an error and want to log it differently.

It is really easy with ngOnInit over a constructor, it also limits how many callback layers I need to add to my application.

For Example:

export class Users implements OnInit{

    user_list: Array<any>;

    constructor(private _userService: UserService){
    };

    ngOnInit(){
        this.getUsers();
    };

    getUsers(){
        this._userService.getUsersFromService().subscribe(users =>  this.user_list = users);
    };


}

with my constructor I could just call my _userService and populate my user_list, but maybe I want to do some extra things with it. Like make sure everything is upper_case, I am not entirely sure how my data is coming through.

So it makes it much easier to use ngOnInit.

export class Users implements OnInit{

    user_list: Array<any>;

    constructor(private _userService: UserService){
    };

    ngOnInit(){
        this.getUsers();
    };

    getUsers(){
        this._userService.getUsersFromService().subscribe(users =>  this.user_list = users);
        this.user_list.toUpperCase();
    };


}

It makes it much easier to see, and so I just call my function within my component when I initialize instead of having to dig for it somewhere else. Really it's just another tool you can use to make it easier to read and use in the future. Also I find it really bad practice to put function calls within a constructor!

i think the problem is we are trying to connect to a local server that is not running.

we need to first run the MySQL server then connect to it.

just Go to task manager > services find MYSQL80 and then start the service.

What I wound up doing is creating an arbitrary class called .elementhasfocus which is added and removed within the jQuery focus() function. When the hover() function runs on mouse out, it checks for .elementhasfocus:

if(!$("#quotebox").is(".boxhasfocus")) $(this).removeClass("box_border");

So if it doesn't have that class (read: no elements within the div have focus) the border is removed. Otherwise, nothing happens.

Simply we can format the date like,

var month = date.getMonth() + 1;
var day = date.getDate();
var date1 = (('' + day).length < 2 ? '0' : '') + day + '/' + (('' + month).length < 2 ? '0' : '') + month + '/' + date.getFullYear();
$("#txtDate").val($.datepicker.formatDate('dd/mm/yy', new Date(date1)));

Where "date" is a date in any format.

Here is my method, i have used flex with some changes in media query.

  @media (min-width: 0px) and (max-width: 767px) {
  .fsi-row-xs-level {
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
  }
}
@media (min-width: 768px) and (max-width: 991px) {
  .fsi-row-sm-level {
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
  }
}
@media (min-width: 992px) and (max-width: 1199px) {
  .fsi-row-md-level {
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
  }
}
@media (min-width: 1200px) {
  .fsi-row-lg-level {
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
  }
}

then added the classes to the parent which were required.

<div class="row fsi-row-lg-level fsi-row-md-level">
<div class="col-sm-4">column 1</div>
<div class="col-sm-4">column 2</div>
<div class="col-sm-4">column 3</div>
</div>

I am using responsive breakpoints because flux usually hampers the bootstrap standard responsive nature.

A concise way to check if the string is nil or empty would be:

var myString: String? = nil

if (myString ?? "").isEmpty {
    print("String is nil or empty")
}

Performance wise, they are exactly the same (at least in SQL Server) but be aware that they are deprecating this join syntax and it's not supported by sql server2005 out of the box.

I think you are thinking of the deprecated *= and =* operators vs. "outer join".

I have just now tested the two formats given, and they work properly on a SQL Server 2008 database. In my case they yielded identical execution plans, but I couldn't confidently say that this would always be true.

Since the string "North" might be the beginning of a street name, e.g. "Northern Boulevard", street directions are always between the street number and the street name, and separated from street number and street name.

Public Function strReplace(varValue As Variant) as Variant

Select Case varValue

    Case "Avenue"
        strReplace = "Ave"

    Case " North "
        strReplace = " N "

    Case Else
        strReplace = varValue

End Select

End Function

I had similar problem. I needed to write down csv file on driver while I was connect to cluster in client mode.

I wanted to reuse the same CSV parsing code as Apache Spark to avoid potential errors.

I checked spark-csv code and found code responsible for converting dataframe into raw csv RDD[String] in com.databricks.spark.csv.CsvSchemaRDD.

Sadly it is hardcoded with sc.textFile and the end of relevant method.

I copy-pasted that code and removed last lines with sc.textFile and returned RDD directly instead.

My code:

/*
  This is copypasta from com.databricks.spark.csv.CsvSchemaRDD
  Spark's code has perfect method converting Dataframe -> raw csv RDD[String]
  But in last lines of that method it's hardcoded against writing as text file -
  for our case we need RDD.
 */
object DataframeToRawCsvRDD {

  val defaultCsvFormat = com.databricks.spark.csv.defaultCsvFormat

  def apply(dataFrame: DataFrame, parameters: Map[String, String] = Map())
           (implicit ctx: ExecutionContext): RDD[String] = {
    val delimiter = parameters.getOrElse("delimiter", ",")
    val delimiterChar = if (delimiter.length == 1) {
      delimiter.charAt(0)
    } else {
      throw new Exception("Delimiter cannot be more than one character.")
    }

    val escape = parameters.getOrElse("escape", null)
    val escapeChar: Character = if (escape == null) {
      null
    } else if (escape.length == 1) {
      escape.charAt(0)
    } else {
      throw new Exception("Escape character cannot be more than one character.")
    }

    val quote = parameters.getOrElse("quote", "\"")
    val quoteChar: Character = if (quote == null) {
      null
    } else if (quote.length == 1) {
      quote.charAt(0)
    } else {
      throw new Exception("Quotation cannot be more than one character.")
    }

    val quoteModeString = parameters.getOrElse("quoteMode", "MINIMAL")
    val quoteMode: QuoteMode = if (quoteModeString == null) {
      null
    } else {
      QuoteMode.valueOf(quoteModeString.toUpperCase)
    }

    val nullValue = parameters.getOrElse("nullValue", "null")

    val csvFormat = defaultCsvFormat
      .withDelimiter(delimiterChar)
      .withQuote(quoteChar)
      .withEscape(escapeChar)
      .withQuoteMode(quoteMode)
      .withSkipHeaderRecord(false)
      .withNullString(nullValue)

    val generateHeader = parameters.getOrElse("header", "false").toBoolean
    val headerRdd = if (generateHeader) {
      ctx.sparkContext.parallelize(Seq(
        csvFormat.format(dataFrame.columns.map(_.asInstanceOf[AnyRef]): _*)
      ))
    } else {
      ctx.sparkContext.emptyRDD[String]
    }

    val rowsRdd = dataFrame.rdd.map(row => {
      csvFormat.format(row.toSeq.map(_.asInstanceOf[AnyRef]): _*)
    })

    headerRdd union rowsRdd
  }

}

You may be looking for

-webkit-appearance: none;

• Safari CSS notes on -webkit-appearance
• Mozilla Developer Network's -moz-appearance

class Grandpa 
{
    public function __construct()
    {}
}

class Papa extends Grandpa
{
    public function __construct()
    {
        //call Grandpa's constructor
        parent::__construct();
    }
}

class Kiddo extends Papa
{
    public function __construct()
    {
        //this is not a bug, it works that way in php
        Grandpa::__construct();
    }
}

I found this approach simple and useful: How to "merge" specific files from another branch

As it turns out, we’re trying too hard. Our good friend git checkout is the right tool for the job.

git checkout source_branch <paths>...

We can simply give git checkout the name of the feature branch A and the paths to the specific files that we want to add to our master branch.

Please read the whole article for more understanding

This is exactly what I was looking for after finding that RedirectToAction() would not pass complex class objects.

As an example, I want to call the IndexComparison method in the LifeCycleEffectsResults controller and pass it a complex class object named model.

Here is the code that failed:

return RedirectToAction("IndexComparison", "LifeCycleEffectsResults", model);

Worth noting is that Strings, integers, etc were surviving the trip to this controller method, but generic list objects were suffering from what was reminiscent of C memory leaks.

As recommended above, here's the code I replaced it with:

var controller = DependencyResolver.Current.GetService<LifeCycleEffectsResultsController>();

var result = controller.IndexComparison(model);
return result;

All is working as intended now. Thank you for leading the way.

Find a note here: https://code.visualstudio.com/docs/python/environments#_conda-environments

As noted earlier, the Python extension automatically detects existing conda environments provided that the environment contains a Python interpreter. For example, the following command creates a conda environment with the Python 3.4 interpreter and several libraries, which VS Code then shows in the list of available interpreters:

 conda create -n env-01 python=3.4 scipy=0.15.0 astroid babel 

In contrast, if you fail to specify an interpreter, as with conda create --name env-00, the environment won't appear in the list.

I have managed to get my PDA working properly with Windows 10.

For transparency when I posted the original question I had upgraded a Windows 8.1 PC to Windows 10, I have since moved to using a different PC that had a clean Windows 10 installation.

These are the steps I followed to solve the problem:

• First of all I installed Visual Studio 2008.
• Then I installed Microsoft Windows Mobile Device Center 6.1
  • http://www.microsoft.com/en-us/download/details.aspx?id=3182
• Then Windows Mobile 6 Professional and Standard Software Development Kits Refresh
  • http://www.microsoft.com/en-us/download/details.aspx?id=6135
• Then Windows Mobile 6.5 Developer Tool Kit
  • http://www.microsoft.com/en-us/download/details.aspx?id=17284
• Finally I opened up the Mobile Device Center, went to Mobile Device Settings -> Connection Settings and made sure DMA was selected under "Allow connections to one of the following"

I do it like this <center></center>

<div class="form-actions">
            <center>
                    <button type="submit" class="submit btn btn-primary ">
                        Sign In <i class="icon-angle-right"></i>
                    </button>
            </center>
</div>

Use SELECT CONVERT(date, '20140327')

In your case,

SELECT [FIRST_NAME],
       [MIDDLE_NAME],
       [LAST_NAME],
       CONVERT(date, [GRADUATION_DATE])     
FROM mydb

For Xcode users: If your rename your file in Xcode you see the badge icon change to append. If you do a commit using XCode you will actually create a new file and lose the history.

A workaround is easy but you have to do it before commiting using Xcode:

1. Do a git Status on your folder. You should see that the staged changes are correct:

renamed: Project/OldName.h -> Project/NewName.h renamed: Project/OldName.m -> Project/NewName.m

1. do commit -m 'name change'

Then go back to XCode and you will see the badge changed from A to M and it is save to commit furtur changes in using xcode now.

Try this

"[A-Za-z0-9_-]+"

Should allow underscores and hyphens

Full Solution is here

This will clear search when search x is clicked. or will call the search api hit when user hit enter. this code can be further extended with additional esc keyup event matcher. but this should do it all.

document.getElementById("userSearch").addEventListener("search", 
function(event){
  if(event.type === "search"){
    if(event.currentTarget.value !== ""){
      hitSearchAjax(event.currentTarget.value);
    }else {
      clearSearchData();  
    }
  }
});

Cheers.

This was helpful for me:

    jQuery('button').click( function(e) {
    jQuery('.in').collapse('hide');
});

It's collapsed already open section. Thnks to GrafiCode Studio

I wanted a more permanent and quicker way. Because I tend to forget to add extra lines before writing my actual Update/Insert queries.

I did it by checking SET IMPLICIT_TRANSACTIONS check-box from Options. To navigate to Options Select Tools>Options>Query Execution>SQL Server>ANSI in your Microsoft SQL Server Management Studio.

Just make sure to execute commit or rollback after you are done executing your queries. Otherwise, the table you would have run the query will be locked for others.

you could register an interval on the page using setInterval, ie:

setInterval(function(){ 
    //code goes here that will be run every 5 seconds.    
}, 5000);

Javascript String objects have a split function, doesn't really need to be jQuery specific

 var str = "nice.test"
 var strs = str.split(".")

strs would be

 ["nice", "test"]

I'd be tempted to use JSON in your example though. The php could return the JSON which could easily be parsed

 success: function(data) {
   var items = JSON.parse(data)
 }

Have a look at the following code snippet. You have mentioned Most files will be 30-40 MB. This claims to read 180 MB in 1.4 seconds on an Intel Quad Core:

private int _bufferSize = 16384;

private void ReadFile(string filename)
{
    StringBuilder stringBuilder = new StringBuilder();
    FileStream fileStream = new FileStream(filename, FileMode.Open, FileAccess.Read);

    using (StreamReader streamReader = new StreamReader(fileStream))
    {
        char[] fileContents = new char[_bufferSize];
        int charsRead = streamReader.Read(fileContents, 0, _bufferSize);

        // Can't do much with 0 bytes
        if (charsRead == 0)
            throw new Exception("File is 0 bytes");

        while (charsRead > 0)
        {
            stringBuilder.Append(fileContents);
            charsRead = streamReader.Read(fileContents, 0, _bufferSize);
        }
    }
}

Original Article

None of the above answers worked for me, but I got it working with the following:

src="'https://maps.google.com/maps?q=' + lat + ',' + long + '&t=&z=15&ie=UTF8&iwloc=&output=embed'"

Using Thomas Bratt's answer above, just make sure your build.xml is configured properly :

<?xml version="1.0" ?>
<!-- Configuration of the Ant build system to generate a Jar file --> 
<project name="TestMain" default="CreateJar">
  <target name="CreateJar" description="Create Jar file">
        <jar jarfile="Test.jar" basedir="bin/" includes="**/*.class" />
  </target>
</project>

(Notice the double asterisk - it will tell build to look for .class files in all sub-directories.)

Just to highlight @Darkonaut answer because I think it should be more visible.

new_list = [] or new_list = list() are both fine (ignoring performance), but append() returns None, as result you can't do new_list = new_list.append(something).

.show-grid [class*="span"]

It's a CSS selector that selects all elements with the class show-grid that has a child element whose class contains the name span.

Would

import os
cwd = os.getcwd()

do what you want? I'm not sure what exactly you mean by the "current script directory". What would the expected output be for the use cases you gave?

You're looking for the /Y switch.

As an alternative you can just put this line in your code blocks and check php logs, for really slow functions it's pretty useful:

trigger_error("Task done at ". strftime('%H:%m:%S', time()), E_USER_NOTICE); 

For serious debugging use XDebug + Cachegrind, see https://blog.nexcess.net/2011/01/29/diagnosing-slow-php-execution-with-xdebug-and-kcachegrind/

SELECT a.* 
FROM user a INNER JOIN (SELECT userid,Max(date) AS date12 FROM user1 GROUP BY userid) b  
ON a.date=b.date12 AND a.userid=b.userid ORDER BY a.userid;

Use the phpinfo(); function to see the table of settings on your browser and look for the

Configuration File (php.ini) Path

and edit that file. Your computer can have multiple php.ini files, you want to edit the right one.

Also check display_errors = On, html_errors = On and error_reporting = E_ALL inside that file

Restart Apache.

If you already test with a submit action, you have noticed that not works too.

The reason is the form is alread posted in a $(document).read(...

So, all you need to do is change that to $(document).load(...

Now, in the moment of you browaser load the page, he will execute.

And will work ;D

There are a few ways to pass the list of files returned by the find command to the cat command, though technically not all use piping, and none actually pipe directly to cat.

1. The simplest is to use backticks (`):

   cat `find [whatever]`
   

   This takes the output of find and effectively places it on the command line of cat. This doesn't work well if find has too much output (more than can fit on a command-line) or if the output has special characters (like spaces).

2. In some shells, including bash, one can use $() instead of backticks :

   cat $(find [whatever])
   

   This is less portable, but is nestable. Aside from that, it has pretty much the same caveats as backticks.

3. Because running other commands on what was found is a common use for find, find has an -exec action which executes a command for each file it finds:

   find [whatever] -exec cat {} \;
   

   The {} is a placeholder for the filename, and the \; marks the end of the command (It's possible to have other actions after -exec.)

   This will run cat once for every single file rather than running a single instance of cat passing it multiple filenames which can be inefficient and might not have the behavior you want for some commands (though it's fine for cat). The syntax is also a awkward to type -- you need to escape the semicolon because semicolon is special to the shell!

4. Some versions of find (most notably the GNU version) let you replace ; with + to use -exec's append mode to run fewer instances of cat:

   find [whatever] -exec cat {} +
   

   This will pass multiple filenames to each invocation of cat, which can be more efficient.

   Note that this is not guaranteed to use a single invocation, however. If the command line would be too long then the arguments are spread across multiple invocations of cat. For cat this is probably not a big deal, but for some other commands this may change the behavior in undesirable ways. On Linux systems, the command line length limit is quite large, so splitting into multiple invocations is quite rare compared to some other OSes.

5. The classic/portable approach is to use xargs:

   find [whatever] | xargs cat
   

   xargs runs the command specified (cat, in this case), and adds arguments based on what it reads from stdin. Just like -exec with +, this will break up the command-line if necessary. That is, if find produces too much output, it'll run cat multiple times. As mentioned in the section about -exec earlier, there are some commands where this splitting may result in different behavior. Note that using xargs like this has issues with spaces in filenames, as xargs just uses whitespace as a delimiter.

6. The most robust, portable, and efficient method also uses xargs:

   find [whatever] -print0 | xargs -0 cat
   

   The -print0 flag tells find to use \0 (null character) delimiters between filenames, and the -0 flag tells xargs to expect these \0 delimiters. This has pretty much identical behavior to the -exec...+ approach, though is more portable (but unfortunately more verbose).

There might be Several plugins but one may use CSS for creating button. First of all click on Source button mentioned in Editor then paste the button code over there, As I use CSS to create button and added href to it.

<p dir="ltr" style="text-align:center"><a href="https://play.google.com/store/apps/details?id=com.mobicom.mobiune&hl=en" style="background-color:#0080ff; border: none;color: white;padding: 6px 20px;text-align: center;text-decoration: none;display: inline-block;border-radius: 8px;font-size: 15px; font-weight: bold;">Open App</a></p>

This is the Button Written Open App over It. You May change the Color as i am using #0080ff (Light Blue)

One way I like to use is:

select ,COUNT()as VAR1 from Table_Name

group by

order by VAR1 desc

limit 1

If you don't want to change your table structure, you can run the following query:

ALTER TABLE [UserStore] 
NOCHECK CONSTRAINT FK_UserStore_User_UserId

ALTER TABLE [UserIdentity]
NOCHECK CONSTRAINT  FK_UserIdentity_User_UserId

BEGIN TRAN

UPDATE  [user] 
SET Id = 10
WHERE Id = 9

UPDATE  [dbo].[UserStore]
SET UserId = 10
WHERE UserId = 9

UPDATE  [dbo].UserIdentity
SET UserId = 10
WHERE UserId = 9

COMMIT TRAN

ALTER TABLE [UserStore] 
CHECK CONSTRAINT FK_UserStore_User_UserId

ALTER TABLE UserIdentity 
CHECK CONSTRAINT FK_UserIdentity_User_UserId

If you want to right-align in a form, you can try:

| Option | Description |
| ------:| -----------:|
| data   | path to data files to supply the data that will be passed into templates. |
| engine | engine to be used for processing templates. Handlebars is the default. |
| ext    | extension to be used for dest files. |

https://learn.getgrav.org/content/markdown#right-aligned-text

This work at least in the Debian Jessie image hosted by Google:

The way to enable to switch from you regular to the root user (AKA “super user”) after authentificating with your Google Computer Engine (GCE) User in the local environment (your Linux server in GCE) is pretty straight forward, in fact it just involves just one command to enable it and another every time to use it:

$ sudo passwd
Enter the new UNIX password: <your new root password>
Retype the new UNIX password: <your new root password>
passwd: password updated successfully

After executing the previous command and once logged with your GCE User you will be able to switch to root anytime by just entering the following command:

$ su
Password: <your newly created root password>
root@intance:/#

As we say in economics “caveat emptor” or buyer be aware: Using the root user is far from a best practice in system’s administration. Using it can be the cause a lot of trouble, from wiping everything in your drives and boot disks without a hiccup to many other nasty stuff that would be laborious to backtrack, troubleshoot and rebuilt. On the other hand, I have never met a SysAdmin that doesn’t think he knows better and root more than he should.

REMEMBER: We humans are programmed in such a way that given enough time at one at some point or another are going to press enter without taking into account that we have escalated to root and I can assure you that it will great source of pain, regret and extra work. PLEASE USE ROOT PRIVILEGES SPARSELY AND WITH EXTREME CARE.

Having said all the boring stuff, Have fun, live on the edge, life is short, you only get to live it once, the more you break the more you learn.

Hope the sytem you compiled on and the system you are debugging on have the same architecture. I ran into an issue where debugging symbols of 32 bit binary refused to load up on my 64 bit machine. Switching to a 32 bit system worked for me.

To show how much fun it is to create some functions that are fail fast I've written the following 3 functions.

One creates an AES key, one encodes it and one decodes it back. These three methods can be used with Java 8 (without dependence of internal classes or outside dependencies):

public static SecretKey generateAESKey(int keysize)
        throws InvalidParameterException {
    try {
        if (Cipher.getMaxAllowedKeyLength("AES") < keysize) {
            // this may be an issue if unlimited crypto is not installed
            throw new InvalidParameterException("Key size of " + keysize
                    + " not supported in this runtime");
        }

        final KeyGenerator keyGen = KeyGenerator.getInstance("AES");
        keyGen.init(keysize);
        return keyGen.generateKey();
    } catch (final NoSuchAlgorithmException e) {
        // AES functionality is a requirement for any Java SE runtime
        throw new IllegalStateException(
                "AES should always be present in a Java SE runtime", e);
    }
}

public static SecretKey decodeBase64ToAESKey(final String encodedKey)
        throws IllegalArgumentException {
    try {
        // throws IllegalArgumentException - if src is not in valid Base64
        // scheme
        final byte[] keyData = Base64.getDecoder().decode(encodedKey);
        final int keysize = keyData.length * Byte.SIZE;

        // this should be checked by a SecretKeyFactory, but that doesn't exist for AES
        switch (keysize) {
        case 128:
        case 192:
        case 256:
            break;
        default:
            throw new IllegalArgumentException("Invalid key size for AES: " + keysize);
        }

        if (Cipher.getMaxAllowedKeyLength("AES") < keysize) {
            // this may be an issue if unlimited crypto is not installed
            throw new IllegalArgumentException("Key size of " + keysize
                    + " not supported in this runtime");
        }

        // throws IllegalArgumentException - if key is empty
        final SecretKeySpec aesKey = new SecretKeySpec(keyData, "AES");
        return aesKey;
    } catch (final NoSuchAlgorithmException e) {
        // AES functionality is a requirement for any Java SE runtime
        throw new IllegalStateException(
                "AES should always be present in a Java SE runtime", e);
    }
}

public static String encodeAESKeyToBase64(final SecretKey aesKey)
        throws IllegalArgumentException {
    if (!aesKey.getAlgorithm().equalsIgnoreCase("AES")) {
        throw new IllegalArgumentException("Not an AES key");
    }

    final byte[] keyData = aesKey.getEncoded();
    final String encodedKey = Base64.getEncoder().encodeToString(keyData);
    return encodedKey;
}

any is something specific to TypeScript is explained quite well by alex's answer.

Object refers to the JavaScript object type. Commonly used as {} or sometimes new Object. Most things in javascript are compatible with the object data type as they inherit from it. But any is TypeScript specific and compatible with everything in both directions (not inheritance based). e.g. :

var foo:Object; 
var bar:any;
var num:number;

foo = num; // Not an error
num = foo; // ERROR 

// Any is compatible both ways 
bar = num;
num = bar;  

I believe for this typical case, i.e. to run something with a fixed interval, Timer is more appropriate. Here is a simple example:

myTimer = new Timer();
myTimer.schedule(new TimerTask() {          
@Override
public void run() {
    // If you want to modify a view in your Activity
    MyActivity.this.runOnUiThread(new Runnable()
        public void run(){
            tv.append("Hello World");
        });
    }
}, 1000, 1000); // initial delay 1 second, interval 1 second

Using Timer has few advantages:

• Initial delay and the interval can be easily specified in the schedule function arguments
• The timer can be stopped by simply calling myTimer.cancel()
• If you want to have only one thread running, remember to call myTimer.cancel() before scheduling a new one (if myTimer is not null)

To amend SDP's answer above, you do NOT need to declarecol-xs-12 in <div class="col-xs-12 col-sm-6">. Bootstrap 3 is mobile-first, so every div column is assumed to be a 100% width div by default - which means at the "xs" size it is 100% width, it will always default to that behavior regardless of what you set at sm, md, lg. If you want your xs columns to be not 100%, then you normally do a col-xs-(1-11).

@media (max-width: 767px) {
    footer .text-right, 
    footer .text-left {
        text-align: center;
    } 
}

I updated @loddn's answer, making two changes

• max-width of xs screens in bootstrap is 767px (768px is the start of sm screens)
• (this one is a matter of preference) I used footer instead of col-* so that if the column widths change, the CSS doesn't need to be updated.

The most straight-forward approach is to do a second if-test but with the condition inverted. This technique is shorter, easier on the eyes, and easier to get right than a choose-when-otherwise nested block:

<xsl:variable name="CreatedDate" select="@createDate"/>
     <xsl:variable name="IDAppendedDate" select="2012-01-01" />
     <b>date: <xsl:value-of select="$CreatedDate"/></b> 
     <xsl:if test="$CreatedDate &gt; $IDAppendedDate">
        <h2> mooooooooooooo </h2>
     </xsl:if>
     <xsl:if test="$CreatedDate &lt;= $IDAppendedDate">
        <h2> dooooooooooooo </h2>
     </xsl:if>

Here's a real-world example of the technique being used in the style-sheet for a government website: http://w1.weather.gov/xml/current_obs/latest_ob.xsl

I ran into the same issue while trying to build a very old copy of omniORB on a CentOS 7 machine. Resolved the issue by installing the python development libraries:

# yum install python-devel

This installed the Python.h into:

/usr/include/python2.7/Python.h

Thanks to CSS3 there is a solution !

The solution is to put the image as background-image and then set the background-size to contain.

HTML

<div class='bounding-box'>
</div>

CSS

.bounding-box {
  background-image: url(...);
  background-repeat: no-repeat;
  background-size: contain;
}

Test it here: http://www.w3schools.com/cssref/playit.asp?filename=playcss_background-size&preval=contain

Full compatibility with latest browsers: http://caniuse.com/background-img-opts

To align the div in the center, you can use this variation:

.bounding-box {
  background-image: url(...);
  background-size: contain;
  position: absolute;
  background-position: center;
  background-repeat: no-repeat;
  height: 100%;
  width: 100%;
}

If you care about the sequence of the terms, you may consider using a syntax like

select * from T where C like'%David%Moses%Robi%'

for Microsoft SQL Server Management Studio 2012,2008.. First Copy your database file .mdf and log file .ldf & Paste in your sql server install file in Programs Files->Microsoft SQL Server->MSSQL10.SQLEXPRESS->MSSQL->DATA. Then open Microsoft Sql Server . Right Click on Databases -> Select Attach...option.

Maybe you could try out this: http://cometaddin.codeplex.com/

Microsoft API Code Pack. ShellObjectWatcher class.

Runtime rt = Runtime.getRuntime();
rt.maxMemory()

value is b

ActivityManager am = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
am.getMemoryClass()

value is MB

Just to add my results, also using Matplotlib.

.eps made all my text bold and removed transparency. .svg gave me high-resolution pictures that actually looked like my graph.

import matplotlib.pyplot as plt
fig, ax = plt.subplots()
# Do the plot code
fig.savefig('myimage.svg', format='svg', dpi=1200)

I used 1200 dpi because a lot of scientific journals require images in 1200 / 600 / 300 dpi, depending on what the image is of. Convert to desired dpi and format in GIMP or Inkscape.

Obviously the dpi doesn't matter since .svg are vector graphics and have "infinite resolution".

Let it be simple. It's as simple as

1. Return promise in your service(no need to use then in service)
2. Use then in your controller

Demo. http://plnkr.co/edit/cbdG5p?p=preview

var app = angular.module('plunker', []);

app.factory('myService', function($http) {
  return {
    async: function() {
      return $http.get('test.json');  //1. this returns promise
    }
  };
});

app.controller('MainCtrl', function( myService,$scope) {
  myService.async().then(function(d) { //2. so you can use .then()
    $scope.data = d;
  });
});

public static Stream ToStream(this Image image)
{
     var stream = new MemoryStream();

     image.Save(stream, image.RawFormat);
     stream.Position = 0;

     return stream;
 }

You could avoid changing the code (although I recommend Boris' answer) and mock the constructor, like in this example for mocking the creation of a File object inside a method. Don't forget to put the class that will create the file in the @PrepareForTest.

package hello.easymock.constructor;

import java.io.File;

import org.easymock.EasyMock;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.api.easymock.PowerMock;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;
    
@RunWith(PowerMockRunner.class)
@PrepareForTest({File.class})
public class ConstructorExampleTest {
        
    @Test
    public void testMockFile() throws Exception {

        // first, create a mock for File
        final File fileMock = EasyMock.createMock(File.class);
        EasyMock.expect(fileMock.getAbsolutePath()).andReturn("/my/fake/file/path");
        EasyMock.replay(fileMock);

        // then return the mocked object if the constructor is invoked
        Class<?>[] parameterTypes = new Class[] { String.class };
        PowerMock.expectNew(File.class, parameterTypes , EasyMock.isA(String.class)).andReturn(fileMock);
        PowerMock.replay(File.class); 
    
        // try constructing a real File and check if the mock kicked in
        final String mockedFilePath = new File("/real/path/for/file").getAbsolutePath();
        Assert.assertEquals("/my/fake/file/path", mockedFilePath);
    }
}

No, there is no API for Google Voice announced as of 2021.

"pygooglevoice" can perform most of the voice functions from Python. It can send SMS. I've developed code to receive SMS messages, but the overhead is excessive given the current Google Voice interface. Each poll returns over 100K of content, so you'd use a quarter-gigabyte a day just polling every 30 seconds. There's a discussion on Google Code about this.

Here is another construction which starts with the simplest number format and then, in a non-overlapping way, progressively adds more complex number formats:

Java regep:

(\d)|([1-9]\d+)|(\.\d+)|(\d\.\d*)|([1-9]\d+\.\d*)|([1-9]\d{0,2}(,\d{3})+(\.\d*)?)

As a Java String (note the extra \ needed to escape to \ and . since \ and . have special meaning in a regexp when on their own):

String myregexp="(\\d)|([1-9]\\d+)|(\\.\\d+)|(\\d\\.\\d*)|([1-9]\\d+\\.\\d*)|([1-9]\\d{0,2}(,\\d{3})+(\\.\\d*)?)";   

Explanation:

1. This regexp has the form A|B|C|D|E|F where A,B,C,D,E,F are themselves regexps that do not overlap. Generally, I find it easier to start with the simplest possible matches, A. If A misses matches you want, then create a B that is a minor modification of A and includes a bit more of what you want. Then, based on B, create a C that catches more, etc. I also find it easier to create regexps that don't overlap; it is easier to understand a regexp with 20 simple non-overlapping regexps connected with ORs rather than a few regexps with more complex matching. But, each to their own!

2. A is (\d) and matches exactly one of 0,1,2,3,4,5,6,7,8,9 which can't be simpler!

3. B is ([1-9]\d+) and only matches numbers with 2 or more digits, the first excluding 0 . B matches exactly one of 10,11,12,... B does not overlap A but is a small modification of A.

4. C is (.\d+) and only matches a decimal followed by one or more digits. C matches exactly one of .0 .1 .2 .3 .4 .5 .6 .7 .8 .9 .00 .01 .02 ... . .23000 ... C allows trailing eros on the right which I prefer: if this is measurement data, the number of trailing zeros indicates the level of precision. If you don't want the trailing zeros on the right, change (.\d+) to (.\d*[1-9]) but this also excludes .0 which I think should be allowed. C is also a small modification of A.

5. D is (\d.\d*) which is A plus decimals with trailing zeros on the right. D only matches a single digit, followed by a decimal, followed by zero or more digits. D matches 0. 0.0 0.1 0.2 ....0.01000...9. 9.0 9.1..0.0230000 .... 9.9999999999... If you want to exclude "0." then change D to (\d.\d+). If you want to exclude trailing zeros on the right, change D to (\d.\d*[1-9]) but this excludes 2.0 which I think should be included. D does not overlap A,B,or C.

6. E is ([1-9]\d+.\d*) which is B plus decimals with trailing zeros on the right. If you want to exclude "13.", for example, then change E to ([1-9]\d+.\d+). E does not overlap A,B,C or D. E matches 10. 10.0 10.0100 .... 99.9999999999... Trailing zeros can be handled as in 4. and 5.

7. F is ([1-9]\d{0,2}(,\d{3})+(.\d*)?) and only matches numbers with commas and possibly decimals allowing trailing zeros on the right. The first group ([1-9]\d{0,2}) matches a non-zero digit followed zero, one or two more digits. The second group (,\d{3})+ matches a 4 character group (a comma followed by exactly three digits) and this group can match one or more times (no matches means no commas!). Finally, (.\d*)? matches nothing, or matches . by itself, or matches a decimal . followed by any number of digits, possibly none. Again, to exclude things like "1,111.", change (.\d*) to (.\d+). Trailing zeros can be handled as in 4. or 5. F does not overlap A,B,C,D, or E. I couldn't think of an easier regexp for F.

Let me know if you are interested and I can edit above to handle the trailing zeros on the right as desired.

Here is what matches regexp and what does not:

0
1
02 <- invalid
20
22
003 <- invalid
030 <- invalid
300
033 <- invalid
303
330
333
0004 <- invalid
0040 <- invalid
0400 <- invalid
4000
0044 <- invalid
0404 <- invalid
0440 <- invalid
4004
4040
4400
0444 <- invalid
4044
4404
4440
4444
00005 <- invalid
00050 <- invalid
00500 <- invalid
05000 <- invalid
50000
00055 <- invalid
00505 <- invalid
00550 <- invalid
05050 <- invalid
05500 <- invalid
50500
55000
00555 <- invalid
05055 <- invalid
05505 <- invalid
05550 <- invalid
50550
55050
55500
. <- invalid
.. <- invalid
.0
0.
.1
1.
.00
0.0
00. <- invalid
.02
0.2
02. <- invalid
.20
2.0
20.
.22
2.2
22.
.000
0.00
00.0 <- invalid
000. <- invalid
.003
0.03
00.3 <- invalid
003. <- invalid
.030
0.30
03.0 <- invalid
030. <- invalid
.033
0.33
03.3 <- invalid
033. <- invalid
.303
3.03
30.3
303.
.333
3.33
33.3
333.
.0000
0.000
00.00 <- invalid
000.0 <- invalid
0000. <- invalid
.0004
0.0004
00.04 <- invalid
000.4 <- invalid
0004. <- invalid
.0044
0.044
00.44 <- invalid
004.4 <- invalid
0044. <- invalid
.0404
0.404
04.04 <- invalid
040.4 <- invalid
0404. <- invalid
.0444
0.444
04.44 <- invalid
044.4 <- invalid
0444. <- invalid
.4444
4.444
44.44
444.4
4444.
.00000
0.0000
00.000 <- invalid
000.00 <- invalid
0000.0 <- invalid
00000. <- invalid
.00005
0.0005
00.005 <- invalid
000.05 <- invalid
0000.5 <- invalid
00005. <- invalid
.00055
0.0055
00.055 <- invalid
000.55 <- invalid
0005.5 <- invalid
00055. <- invalid
.00505
0.0505
00.505 <- invalid
005.05 <- invalid
0050.5 <- invalid
00505. <- invalid
.00550
0.0550
00.550 <- invalid
005.50 <- invalid
0055.0 <- invalid
00550. <- invalid
.05050
0.5050
05.050 <- invalid
050.50 <- invalid
0505.0 <- invalid
05050. <- invalid
.05500
0.5500
05.500 <- invalid
055.00 <- invalid
0550.0 <- invalid
05500. <- invalid
.50500
5.0500
50.500
505.00
5050.0
50500.
.55000
5.5000
55.000
550.00
5500.0
55000.
.00555
0.0555
00.555 <- invalid
005.55 <- invalid
0055.5 <- invalid
00555. <- invalid
.05055
0.5055
05.055 <- invalid
050.55 <- invalid
0505.5 <- invalid
05055. <- invalid
.05505
0.5505
05.505 <- invalid
055.05 <- invalid
0550.5 <- invalid
05505. <- invalid
.05550
0.5550
05.550 <- invalid
055.50 <- invalid
0555.0 <- invalid
05550. <- invalid
.50550
5.0550
50.550
505.50
5055.0
50550.
.55050
5.5050
55.050
550.50
5505.0
55050.
.55500
5.5500
55.500
555.00
5550.0
55500.
.05555
0.5555
05.555 <- invalid
055.55 <- invalid
0555.5 <- invalid
05555. <- invalid
.50555
5.0555
50.555
505.55
5055.5
50555.
.55055
5.5055
55.055
550.55
5505.5
55055.
.55505
5.5505
55.505
555.05
5550.5
55505.
.55550
5.5550
55.550
555.50
5555.0
55550.
.55555
5.5555
55.555
555.55
5555.5
55555.
, <- invalid
,, <- invalid
1, <- invalid
,1 <- invalid
22, <- invalid
2,2 <- invalid
,22 <- invalid
2,2, <- invalid
2,2, <- invalid
,22, <- invalid
333, <- invalid
33,3 <- invalid
3,33 <- invalid
,333 <- invalid
3,33, <- invalid
3,3,3 <- invalid
3,,33 <- invalid
,,333 <- invalid
4444, <- invalid
444,4 <- invalid
44,44 <- invalid
4,444
,4444 <- invalid
55555, <- invalid
5555,5 <- invalid
555,55 <- invalid
55,555
5,5555 <- invalid
,55555 <- invalid
666666, <- invalid
66666,6 <- invalid
6666,66 <- invalid
666,666
66,6666 <- invalid
6,66666 <- invalid
66,66,66 <- invalid
6,66,666 <- invalid
,666,666 <- invalid
1,111.
1,111.11
1,111.110
01,111.110 <- invalid
0,111.100 <- invalid
11,11. <- invalid
1,111,.11 <- invalid
1111.1,10 <- invalid
01111.11,0 <- invalid
0111.100, <- invalid
1,111,111.
1,111,111.11
1,111,111.110
01,111,111.110 <- invalid
0,111,111.100 <- invalid
1,111,111.
1,1111,11.11 <- invalid
11,111,11.110 <- invalid
01,11,1111.110 <- invalid
0,111111.100 <- invalid
0002,22.2230 <- invalid
.,5.,., <- invalid
2.0,345,345 <- invalid
2.334.456 <- invalid

An alternative to 'LOAD DATA' is available in which the data will not be moved from your existing source location to hive data warehouse location.

You can use ALTER TABLE command with 'LOCATION' option. Here is below required command

ALTER TABLE table_name ADD PARTITION (date_col='2017-02-07') LOCATION 'hdfs/path/to/location/'

The only condition here is, the location should be a directory instead of file.

Hope this will solve the problem.

I have found the following script is very good at maintaining indexes, you can have this scheduled to run nightly or whatever other timeframe you wish.

http://sqlfool.com/2011/06/index-defrag-script-v4-1/

Let's say you have this image:

to make a circle out of this you only need to add

.circle {
  border-radius: 50%;
  width: 100px;
  height: 100px; 
}

So if you have a div you can do the same thing.

Check the example below:

.circle {_x000D_
  border-radius: 50%;_x000D_
  width: 100px;_x000D_
  height: 100px; _x000D_
  animation: stackoverflow-example infinite 20s linear;_x000D_
  pointer-events: none;_x000D_
}_x000D_
_x000D_
@keyframes stackoverflow-example {_x000D_
  from {_x000D_
    transform: rotate(0deg);_x000D_
  }_x000D_
  to {_x000D_
    transform: rotate(360deg);_x000D_
  }_x000D_
}

<div>_x000D_
  <img class="circle" src="https://www.sitepoint.com/wp-content/themes/sitepoint/assets/images/icon.javascript.png">_x000D_
</div>

Web.config file

<connectionStrings>
  <add name="MyConnectionString" connectionString="Data Source=SERGIO-DESKTOP\SQLEXPRESS;    Initial Catalog=YourDatabaseName;Integrated Security=True;"/>
</connectionStrings>

.cs file

System.Configuration.ConfigurationManager.ConnectionStrings["MyConnectionString"].ConnectionString;

substr([column name],
       [desired starting position (numeric)],
       [# characters to include (numeric)]) in ([complete as usual])

Example

substr([column name],1,4) in ('M510','M615', 'M515', 'M612')

If you only need to show time value in a datagrid or label similar, best way is convert directly time in datetime datatype.

SELECT CONVERT(datetime,myTimeField) as myTimeField FROM Table1

this fails:

 DECLARE @vPortalUID NVARCHAR(32)
 SET @vPortalUID='2A66057D-F4E5-4E2B-B2F1-38C51A96D385'
 DECLARE @nPortalUID AS UNIQUEIDENTIFIER
 SET @nPortalUID = CAST(@vPortalUID AS uniqueidentifier)
 PRINT @nPortalUID

this works

 DECLARE @vPortalUID NVARCHAR(36)
 SET @vPortalUID='2A66057D-F4E5-4E2B-B2F1-38C51A96D385'
 DECLARE @nPortalUID AS UNIQUEIDENTIFIER
 SET @nPortalUID = CAST(@vPortalUID AS UNIQUEIDENTIFIER)
 PRINT @nPortalUID

the difference is NVARCHAR(36), your input parameter is too small!

num1 = num2 = 5

What actually helped me was to turn off the Resharper build and to use the VisualStudio Re-Build option on my project.

to be super duper ))

 fun rnd_int(min: Int, max: Int): Int {
        var max = max
        max -= min
        return (Math.random() * ++max).toInt() + min
    }

You can try mas-cli (Mac Apple Store cli). Github project here

It would be

$ brew install mas
$ mas list
$ mas search Xcode
$ mas install <id> 

$ mas upgrade <id>

upd:

Had issues installing Xcode 12.2 in Big Sur. Solved them by entering into the App Store from the devs link.

https://developer.apple.com/download/release/

Try this: jdbc:oracle:thin:@oracle.hostserver2.mydomain.ca:1522/ABCD

Edit: per comment below this is actualy correct: jdbc:oracle:thin:@//oracle.hostserver2.mydomain.ca:1522/ABCD (note the //)

Here is a link to a helpful article

I have noticed that if utilised progrmmatically it renders incomplete (entire form simply doesn't "paint" anything) if used before panel1.Controls.Add(dataGridView); then dataGridView.Columns["ID"].Visible = false; will break the entire form and make it blank, so to get round that set this AFTER EG:

 panel1.Controls.Add(dataGridView);
 dataGridView.Columns["ID"].Visible = false; 
 //works

 dataGridView.Columns["ID"].Visible = false; 
 panel1.Controls.Add(dataGridView);
 //fails miserably

This works in Python 2 and Python 3:

A random key:

random.choice(list(d.keys()))

A random value

random.choice(list(d.values()))

A random key and value

random.choice(list(d.items()))

The other scenario you mush verify is that the file you're trying to unpack is not empty and is valid.

In my case I wasn't downloading the file correctly, after double check and I made sure I had the right file I could unpack it without any issues.

I suspect one of your scripts includes a source map URL. (Minified jQuery contains a reference to a source map, for example.)

When you open the Chrome developer tools, Chrome will try to fetch the source map from the URL to aid debugging. However, the source map does not actually exist on your server, but you are instead sent a regular 404 page containing HTML.

call super.myMethod();

Could we see your click handler? You're attaching 5 listeners to 5 different elements. However, when the user clicks on the element, only one event is fired.

$(".addproduct").click(function(){
  // Holds the product ID of the clicked element
  var productId = $(this).attr('class').replace('addproduct ', '');

  addToCart(productId);
});

If this solution doesn't work I'd like to look at your click handler.