JQuery ajax call default timeout value

There doesn't seem to be a standardized default value. I have the feeling the default is 0, and the timeout event left totally dependent on browser and network settings.

For IE, there is a timeout property for XMLHTTPRequests here. It defaults to null, and it says the network stack is likely to be the first to time out (which will not generate an ontimeout event by the way).

XMLHttpRequest Origin null is not allowed Access-Control-Allow-Origin for file:/// to file:/// (Serverless)

Here is an applescript that will launch Chrome with the --allow-file-access-from-files switch turned on, for OSX/Chrome devs out there:

set chromePath to POSIX path of "/Applications/Google Chrome.app/Contents/MacOS/Google Chrome"    
set switch to " --allow-file-access-from-files"
do shell script (quoted form of chromePath) & switch & " > /dev/null 2>&1 &"

Add placeholder text inside UITextView in Swift?

SET value in view load

    txtVw!.autocorrectionType = UITextAutocorrectionType.No
    txtVw!.text = "Write your Placeholder"
    txtVw!.textColor = UIColor.lightGrayColor()



func textViewDidBeginEditing(textView: UITextView) {
    if (txtVw?.text == "Write your Placeholder")

    {
        txtVw!.text = nil
        txtVw!.textColor = UIColor.blackColor()
    }
}

func textViewDidEndEditing(textView: UITextView) {
    if txtVw!.text.isEmpty
    {
        txtVw!.text = "Write your Placeholder"
        txtVw!.textColor = UIColor.lightGrayColor()
    }
    textView.resignFirstResponder()
}

Escape double quotes in a string

In C#, there are at least 4 ways to embed a quote within a string:

Escape quote with a backslash
Precede string with @ and use double quotes
Use the corresponding ASCII character
Use the Hexadecimal Unicode character

Please refer this document for detailed explanation.

HTML button to NOT submit form

return false; at the end of the onclick handler will do the job. However, it's be better to simply add type="button" to the <button> - that way it behaves properly even without any JavaScript.

Finding CN of users in Active Directory

Most common AD default design is to have a container, cn=users just after the root of the domain. Thus a DN might be:

cn=admin,cn=users,DC=domain,DC=company,DC=com

Also, you might have sufficient rights in an LDAP bind to connect anonymously, and query for (cn=admin). If so, you should get the full DN back in that query.

How to find out when a particular table was created in Oracle?

You copy and paste the following code. It will display all the tables with Name and Created Date

SELECT object_name,created FROM user_objects
WHERE object_name LIKE  '%table_name%'
AND object_type = 'TABLE';

Note: Replace '%table_name%' with the table name you are looking for.

Network usage top/htop on Linux

Also iftop:

display bandwidth usage on an interface

iftop does for network usage what top(1) does for CPU usage. It listens to network traffic on a named interface and displays a table of current bandwidth usage by pairs of hosts. Handy for answering the question "why is our ADSL link so slow?"...

Amazon S3 exception: "The specified key does not exist"

Don't forget buckets are region specific. That might be an issue.

Also try using the S3 console to navigate to the actual object, and then click on Copy Path, you will get something like:

s3://<bucket-name>/<path>/object.txt

As long as whatever you are passing it to parses that properly I find that is the safest thing to do.

Removing an item from a select box

I found two pages that seem helpful, it's written for ASP.Net, but the same stuff should apply:

How to check if all inputs are not empty with jQuery

You can do it.here is code

<!DOCTYPE html>
<html lang="en">
 <head>
 <meta charset="UTF-8">
 <title></title>
 <script type="text/javascript" src="http://code.jquery.com/jquery.min.js"></script>
<style>
select,textarea,input[type="text"],input[type="password"],input[type="datetime"],input[type="datetime-local"],input[type="date"],input[type="month"],input[type="time"],input[type="week"],input[type="number"],input[type="email"],input[type="url"],input[type="search"],input[type="tel"],input[type="color"],.uneditable-input{display:inline-block;height:20px;padding:4px;margin-bottom:9px;font-size:13px;line-height:18px;color:#555555;}
textarea{height:auto;}
select,textarea,input[type="text"],input[type="password"],input[type="datetime"],input[type="datetime-local"],input[type="date"],input[type="month"],input[type="time"],input[type="week"],input[type="number"],input[type="email"],input[type="url"],input[type="search"],input[type="tel"],input[type="color"],.uneditable-input{background-color:#ffffff;border:1px solid #cccccc;-webkit-border-radius:3px;-moz-border-radius:3px;border-radius:3px;-webkit-box-shadow:inset 0 1px 1px rgba(0, 0, 0, 0.075);-moz-box-shadow:inset 0 1px 1px rgba(0, 0, 0, 0.075);box-shadow:inset 0 1px 1px rgba(0, 0, 0, 0.075);-webkit-transition:border linear 0.2s,box-shadow linear 0.2s;-moz-transition:border linear 0.2s,box-shadow linear 0.2s;-ms-transition:border linear 0.2s,box-shadow linear 0.2s;-o-transition:border linear 0.2s,box-shadow linear 0.2s;transition:border linear 0.2s,box-shadow linear 0.2s;}textarea:focus,input[type="text"]:focus,input[type="password"]:focus,input[type="datetime"]:focus,input[type="datetime-local"]:focus,input[type="date"]:focus,input[type="month"]:focus,input[type="time"]:focus,input[type="week"]:focus,input[type="number"]:focus,input[type="email"]:focus,input[type="url"]:focus,input[type="search"]:focus,input[type="tel"]:focus,input[type="color"]:focus,.uneditable-input:focus{border-color:rgba(82, 168, 236, 0.8);outline:0;outline:thin dotted \9;-webkit-box-shadow:inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px rgba(82,168,236,.6);-moz-box-shadow:inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px rgba(82,168,236,.6);box-shadow:inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px rgba(82,168,236,.6);height: 20px;}
select,input[type="radio"],input[type="checkbox"]{margin:3px 0;*margin-top:0;line-height:normal;cursor:pointer;}
select,input[type="submit"],input[type="reset"],input[type="button"],input[type="radio"],input[type="checkbox"]{width:auto;}
.uneditable-textarea{width:auto;height:auto;}
#country{height: 30px;}
.highlight
{
    border: 1px solid red !important;
}
</style>
<script>
function test()
{
var isFormValid = true;

$(".bs-example input").each(function(){
    if ($.trim($(this).val()).length == 0){
        $(this).addClass("highlight");
        isFormValid = false;
        $(this).focus();
    }
    else{
        $(this).removeClass("highlight");
    }
});

if (!isFormValid) { 
    alert("Please fill in all the required fields (indicated by *)");
}

  return isFormValid;
 }  
 </script>
</head>
 <body>
 <div class="bs-example">
<form onsubmit="return test()">
    <div class="form-group">
        <label for="inputEmail">Email</label>
        <input type="text" class="form-control" id="inputEmail" placeholder="Email">
    </div>
    <div class="form-group">
        <label for="inputPassword">Password</label>
        <input type="password" class="form-control" id="inputPassword" placeholder="Password">
    </div>
    <button type="submit" class="btn btn-primary">Login</button>
   </form>
  </div>
 </body>
 </html>

How can I add an empty directory to a Git repository?

Let's say you need an empty directory named tmp :

$ mkdir tmp
$ touch tmp/.gitignore
$ git add tmp
$ echo '*' > tmp/.gitignore
$ git commit -m 'Empty directory' tmp

In other words, you need to add the .gitignore file to the index before you can tell Git to ignore it (and everything else in the empty directory).

What is the naming convention in Python for variable and function names?

Most python people prefer underscores, but even I am using python since more than 5 years right now, I still do not like them. They just look ugly to me, but maybe that's all the Java in my head.

I simply like CamelCase better since it fits better with the way classes are named, It feels more logical to have SomeClass.doSomething() than SomeClass.do_something(). If you look around in the global module index in python, you will find both, which is due to the fact that it's a collection of libraries from various sources that grew overtime and not something that was developed by one company like Sun with strict coding rules. I would say the bottom line is: Use whatever you like better, it's just a question of personal taste.

How to return data from PHP to a jQuery ajax call

It's an argument passed to your success function:

$.ajax({
  type: "POST",
  url: "somescript.php",
  datatype: "html",
  data: dataString,
  success: function(data) {
    alert(data);
    }
});

The full signature is success(data, textStatus, XMLHttpRequest), but you can use just he first argument if it's a simple string coming back. As always, see the docs for a full explanation :)

Why does one use dependency injection?

Quite frankly, I believe people use these Dependency Injection libraries/frameworks because they just know how to do things in runtime, as opposed to load time. All this crazy machinery can be substituted by setting your CLASSPATH environment variable (or other language equivalent, like PYTHONPATH, LD_LIBRARY_PATH) to point to your alternative implementations (all with the same name) of a particular class. So in the accepted answer you'd just leave your code like

var logger = new Logger() //sane, simple code

And the appropriate logger will be instantiated because the JVM (or whatever other runtime or .so loader you have) would fetch it from the class configured via the environment variable mentioned above.

No need to make everything an interface, no need to have the insanity of spawning broken objects to have stuff injected into them, no need to have insane constructors with every piece of internal machinery exposed to the world. Just use the native functionality of whatever language you're using instead of coming up with dialects that won't work in any other project.

P.S.: This is also true for testing/mocking. You can very well just set your environment to load the appropriate mock class, in load time, and skip the mocking framework madness.

Sort CSV file by column priority using the "sort" command

How can I pretty-print JSON using node.js?

I think this might be useful... I love example code :)

var fs = require('fs');

var myData = {
  name:'test',
  version:'1.0'
}

var outputFilename = '/tmp/my.json';

fs.writeFile(outputFilename, JSON.stringify(myData, null, 4), function(err) {
    if(err) {
      console.log(err);
    } else {
      console.log("JSON saved to " + outputFilename);
    }
});

Detecting when user scrolls to bottom of div with jQuery

Guys this is the solution to the zoom issue, it works with all zoom levels, in case you need it:

if ( Math.abs(elem.offset().top) + elem.height() + elem.offset().top >= elem.outerHeight() ) {
                    console.log("bottom");
                    // We're at the bottom!
                }
            });
        }

C# Help reading foreign characters using StreamReader

Yes, it could be with the actual encoding of the file, probably unicode. Try UTF-8 as that is the most common form of unicode encoding. Otherwise if the file ASCII then standard ASCII encoding should work.

How to find substring from string?

Use std::string and find.

std::string str = "/user/desktop/abc/post/";
bool exists = str.find("/abc/") != std::string::npos;

Homebrew install specific version of formula?

Update on the Library/Formula/postgresql.rb line 8 to

http://ftp2.uk.postgresql.org/sites/ftp.postgresql.org/source/v8.4.6/postgresql-8.4.6.tar.bz2

And MD5 on line 9 to

fcc3daaf2292fa6bf1185ec45e512db6

Save and exit.

brew install postgres
initdb /usr/local/var/postgres

Now in this stage you might face the postgresql could not create shared memory segment error, to work around that update the /etc/sysctl.conf like this:

kern.sysv.shmall=65536
kern.sysv.shmmax=16777216

Try initdb /usr/local/var/postgres again, and it should run smooth.

To run postgresql on start

launchctl load -w /usr/local/Cellar/postgresql/8.4.6/org.postgresql.postgres.plist

Hope that helps :)

Return multiple values from a SQL Server function

Here's the Query Analyzer template for an in-line function - it returns 2 values by default:

-- =============================================  
-- Create inline function (IF)  
-- =============================================  
IF EXISTS (SELECT *   
   FROM   sysobjects   
   WHERE  name = N'<inline_function_name, sysname, test_function>')  
DROP FUNCTION <inline_function_name, sysname, test_function>  
GO  

CREATE FUNCTION <inline_function_name, sysname, test_function>   
(<@param1, sysname, @p1> <data_type_for_param1, , int>,   
 <@param2, sysname, @p2> <data_type_for_param2, , char>)  
RETURNS TABLE   
AS  
RETURN SELECT   @p1 AS c1,   
        @p2 AS c2  
GO  

-- =============================================  
-- Example to execute function  
-- =============================================  
SELECT *   
FROM <owner, , dbo>.<inline_function_name, sysname, test_function>   
    (<value_for_@param1, , 1>,   
     <value_for_@param2, , 'a'>)  
GO

Add timer to a Windows Forms application

Something like this in your form main. Double click the form in the visual editor to create the form load event.

 Timer Clock=new Timer();
 Clock.Interval=2700000; // not sure if this length of time will work 
 Clock.Start();
 Clock.Tick+=new EventHandler(Timer_Tick);

Then add an event handler to do something when the timer fires.

  public void Timer_Tick(object sender,EventArgs eArgs)
  {
    if(sender==Clock)
    {
      // do something here      
    }
  }

How to center a navigation bar with CSS or HTML?

#nav ul {
    display: inline-block;
    list-style-type: none;
}

It should work, I tested it in your site.

enter image description here

String.Format like functionality in T-SQL?

If you are using SQL Server 2012 and above, you can use FORMATMESSAGE. eg.

DECLARE @s NVARCHAR(50) = 'World';
DECLARE @d INT = 123;
SELECT FORMATMESSAGE('Hello %s, %d', @s, @d)
-- RETURNS 'Hello World, 123'

More examples from MSDN: FORMATMESSAGE

SELECT FORMATMESSAGE('Signed int %i, %d %i, %d, %+i, %+d, %+i, %+d', 5, -5, 50, -50, -11, -11, 11, 11);
SELECT FORMATMESSAGE('Signed int with leading zero %020i', 5);
SELECT FORMATMESSAGE('Signed int with leading zero 0 %020i', -55);
SELECT FORMATMESSAGE('Unsigned int %u, %u', 50, -50);
SELECT FORMATMESSAGE('Unsigned octal %o, %o', 50, -50);
SELECT FORMATMESSAGE('Unsigned hexadecimal %x, %X, %X, %X, %x', 11, 11, -11, 50, -50);
SELECT FORMATMESSAGE('Unsigned octal with prefix: %#o, %#o', 50, -50);
SELECT FORMATMESSAGE('Unsigned hexadecimal with prefix: %#x, %#X, %#X, %X, %x', 11, 11, -11, 50, -50);
SELECT FORMATMESSAGE('Hello %s!', 'TEST');
SELECT FORMATMESSAGE('Hello %20s!', 'TEST');
SELECT FORMATMESSAGE('Hello %-20s!', 'TEST');
SELECT FORMATMESSAGE('Hello %20s!', 'TEST');

NOTES:

Undocumented in 2012
Limited to 2044 characters
To escape the % sign, you need to double it.
If you are logging errors in extended events, calling FORMATMESSAGE comes up as a (harmless) error

Python Array with String Indices

Even better, try an OrderedDict (assuming you want something like a list). Closer to a list than a regular dict since the keys have an order just like list elements have an order. With a regular dict, the keys have an arbitrary order.

Note that this is available in Python 3 and 2.7. If you want to use with an earlier version of Python you can find installable modules to do that.

Convert character to ASCII code in JavaScript

For those that want to get a sum of all the ASCII codes for a string:

'Foobar'
  .split('')
  .map(x=>x.charCodeAt(0))
  .reduce((a,b)=>a+b);

Or, ES6:

[...'Foobar']
  .map(char => char.charCodeAt(0))
  .reduce((current, previous) => previous + current)

Dynamic tabs with user-click chosen components

there is component ready to use (rc5 compatible) ng2-steps which uses Compiler to inject component to step container and service for wiring everything together (data sync)

    import { Directive , Input, OnInit, Compiler , ViewContainerRef } from '@angular/core';

import { StepsService } from './ng2-steps';

@Directive({
  selector:'[ng2-step]'
})
export class StepDirective implements OnInit{

  @Input('content') content:any;
  @Input('index') index:string;
  public instance;

  constructor(
    private compiler:Compiler,
    private viewContainerRef:ViewContainerRef,
    private sds:StepsService
  ){}

  ngOnInit(){
    //Magic!
    this.compiler.compileComponentAsync(this.content).then((cmpFactory)=>{
      const injector = this.viewContainerRef.injector;
      this.viewContainerRef.createComponent(cmpFactory, 0,  injector);
    });
  }

}

Could not find main class HelloWorld

I had the same problem. Perhaps, the problem is that you have compiled and executed the class with different Java versions.

Make sure the version of the compiler is the same as the command "java":

javac -version

java -version

In Linux, use

sudo update-alternatives --config java

to change the version of Java.

How to do a deep comparison between 2 objects with lodash?

Deep compare using a template of (nested) properties to check

function objetcsDeepEqualByTemplate(objectA, objectB, comparisonTemplate) {
  if (!objectA || !objectB) return false

  let areDifferent = false
  Object.keys(comparisonTemplate).some((key) => {
    if (typeof comparisonTemplate[key] === 'object') {
      areDifferent = !objetcsDeepEqualByTemplate(objectA[key], objectB[key], comparisonTemplate[key])
      return areDifferent
    } else if (comparisonTemplate[key] === true) {
      areDifferent = objectA[key] !== objectB[key]
      return areDifferent
    } else {
      return false
    }
  })

  return !areDifferent
}

const objA = { 
  a: 1,
  b: {
    a: 21,
    b: 22,
  },
  c: 3,
}

const objB = { 
  a: 1,
  b: {
    a: 21,
    b: 25,
  },
  c: true,
}

// template tells which props to compare
const comparisonTemplateA = {
  a: true,
  b: {
    a: true
  }
}
objetcsDeepEqualByTemplate(objA, objB, comparisonTemplateA)
// returns true

const comparisonTemplateB = {
  a: true,
  c: true
}
// returns false
objetcsDeepEqualByTemplate(objA, objB, comparisonTemplateB)

This will work in the console. Array support could be added if needed

Pure JavaScript: a function like jQuery's isNumeric()

function IsNumeric(val) {
    return Number(parseFloat(val)) === val;
}

Can I grep only the first n lines of a file?

Or use awk for a single process without |:

awk '/your_regexp/ && NR < 11' INPUTFILE

On each line, if your_regexp matches, and the number of records (lines) is less than 11, it executes the default action (which is printing the input line).

Or use sed:

sed -n '/your_regexp/p;10q' INPUTFILE

Checks your regexp and prints the line (-n means don't print the input, which is otherwise the default), and quits right after the 10th line.

Delete a database in phpMyAdmin

How to delete a database in phpMyAdmin?

From the Operations tab of the database, look for (and click) the text Drop the database (DROP).

file_get_contents() Breaks Up UTF-8 Characters

In Turkish language, mb_convert_encoding or any other charset conversion did not work.

And also urlencode did not work because of space char converted to + char. It must be %20 for percent encoding.

This one worked!

   $url = rawurlencode($url);
   $url = str_replace("%3A", ":", $url);
   $url = str_replace("%2F", "/", $url);

   $data = file_get_contents($url);

Checking version of angular-cli that's installed?

Go to the package.json file, check the "@angular/core" version. It is an actual project version.

Get contentEditable caret index position

A straight forward way, that iterates through all the chidren of the contenteditable div until it hits the endContainer. Then I add the end container offset and we have the character index. Should work with any number of nestings. uses recursion.

Note: requires a poly fill for ie to support Element.closest('div[contenteditable]')

https://codepen.io/alockwood05/pen/vMpdmZ

function caretPositionIndex() {
    const range = window.getSelection().getRangeAt(0);
    const { endContainer, endOffset } = range;

    // get contenteditableDiv from our endContainer node
    let contenteditableDiv;
    const contenteditableSelector = "div[contenteditable]";
    switch (endContainer.nodeType) {
      case Node.TEXT_NODE:
        contenteditableDiv = endContainer.parentElement.closest(contenteditableSelector);
        break;
      case Node.ELEMENT_NODE:
        contenteditableDiv = endContainer.closest(contenteditableSelector);
        break;
    }
    if (!contenteditableDiv) return '';


    const countBeforeEnd = countUntilEndContainer(contenteditableDiv, endContainer);
    if (countBeforeEnd.error ) return null;
    return countBeforeEnd.count + endOffset;

    function countUntilEndContainer(parent, endNode, countingState = {count: 0}) {
      for (let node of parent.childNodes) {
        if (countingState.done) break;
        if (node === endNode) {
          countingState.done = true;
          return countingState;
        }
        if (node.nodeType === Node.TEXT_NODE) {
          countingState.count += node.length;
        } else if (node.nodeType === Node.ELEMENT_NODE) {
          countUntilEndContainer(node, endNode, countingState);
        } else {
          countingState.error = true;
        }
      }
      return countingState;
    }
  }

maven... Failed to clean project: Failed to delete ..\org.ow2.util.asm-asm-tree-3.1.jar

I had similar issue. Earlier I was using Maven 3 to build the project. After switching to maven 2 , I had the above error.

Solved it by switching to Maven 3.

How to calculate the sentence similarity using word2vec model of gensim with python

You can just add the word vectors of one sentence together. Then count the Cosine similarity of two sentence vector as the similarity of two sentence. I think that's the most easy way.

Printing prime numbers from 1 through 100

To find whether no. is prime or not C++:

#include<iostream>
#include<cmath>

using namespace std;
int main(){

int n, counter=0;

cout <<"Enter a number to check whether it is prime or not \n";
cin>>n;

  for(int i=2; i<=n-1;i++) {
    if (n%i==0) {
      cout<<n<<" is NOT a prime number \n";
      break;
    }
    counter++;
                }
    //cout<<"Value n is "<<n<<endl;
    //cout << "number of times counter run is "<<counter << endl;
    if (counter == n-2)
      cout << n<< " is prime \n";
   return 0;
}

Logo image and H1 heading on the same line

Steps:

Surround both the elements with a container div.
Add overflow:auto to container div.
Add float:left to the first element.
Add position:relative; top: 0.2em; left: 24em to the second element (Top and left values can vary according to you).

How to programmatically connect a client to a WCF service?

You can also do what the "Service Reference" generated code does

public class ServiceXClient : ClientBase<IServiceX>, IServiceX
{
    public ServiceXClient() { }

    public ServiceXClient(string endpointConfigurationName) :
        base(endpointConfigurationName) { }

    public ServiceXClient(string endpointConfigurationName, string remoteAddress) :
        base(endpointConfigurationName, remoteAddress) { }

    public ServiceXClient(string endpointConfigurationName, EndpointAddress remoteAddress) :
        base(endpointConfigurationName, remoteAddress) { }

    public ServiceXClient(Binding binding, EndpointAddress remoteAddress) :
        base(binding, remoteAddress) { }

    public bool ServiceXWork(string data, string otherParam)
    {
        return base.Channel.ServiceXWork(data, otherParam);
    }
}

Where IServiceX is your WCF Service Contract

Then your client code:

var client = new ServiceXClient(new WSHttpBinding(SecurityMode.None), new EndpointAddress("http://localhost:911"));
client.ServiceXWork("data param", "otherParam param");

ImportError: no module named win32api

After installing pywin32

Steps to correctly install your module (pywin32)

First search where is your python pip is present

1a. For Example in my case location of pip - C:\Users\username\AppData\Local\Programs\Python\Python36-32\Scripts

Then open your command prompt and change directory to your pip folder location.

cd C:\Users\username\AppData\Local\Programs\Python\Python36-32\Scripts

C:\Users\username\AppData\Local\Programs\Python\Python36-32\Scripts>pip install 
pypiwin32

Restart your IDE

All done now you can use the module .

Javascript : Send JSON Object with Ajax?

With jQuery:

$.post("test.php", { json_string:JSON.stringify({name:"John", time:"2pm"}) });

Without jQuery:

var xmlhttp = new XMLHttpRequest();   // new HttpRequest instance 
xmlhttp.open("POST", "/json-handler");
xmlhttp.setRequestHeader("Content-Type", "application/json");
xmlhttp.send(JSON.stringify({name:"John Rambo", time:"2pm"}));

getMinutes() 0-9 - How to display two digit numbers?

Numbers don't have a length, but you can easily convert the number to a string, check the length and then prepend the 0 if it's necessary:

var strMonth = '' + date.getMinutes();
if (strMonth.length == 1) {
  strMonth = '0' + strMonth;
}

Sending message through WhatsApp

This works to me:

public static void shareWhatsApp(Activity appActivity, String texto) {

    Intent sendIntent = new Intent(Intent.ACTION_SEND);     
    sendIntent.setType("text/plain");
    sendIntent.putExtra(android.content.Intent.EXTRA_TEXT, texto);

    PackageManager pm = appActivity.getApplicationContext().getPackageManager();
    final List<ResolveInfo> matches = pm.queryIntentActivities(sendIntent, 0);
    boolean temWhatsApp = false;
    for (final ResolveInfo info : matches) {
      if (info.activityInfo.packageName.startsWith("com.whatsapp"))  {
          final ComponentName name = new ComponentName(info.activityInfo.applicationInfo.packageName, info.activityInfo.name);
          sendIntent.addCategory(Intent.CATEGORY_LAUNCHER);
          sendIntent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY | Intent.FLAG_ACTIVITY_NEW_TASK);
          sendIntent.setComponent(name);
          temWhatsApp = true;
          break;
      }
    }               

    if(temWhatsApp) {
        //abre whatsapp
        appActivity.startActivity(sendIntent);
    } else {
        //alerta - você deve ter o whatsapp instalado
        Toast.makeText(appActivity, appActivity.getString(R.string.share_whatsapp), Toast.LENGTH_SHORT).show();
    }
}

tkinter: how to use after method

You need to give a function to be called after the time delay as the second argument to after:

after(delay_ms, callback=None, *args)

Registers an alarm callback that is called after a given time.

So what you really want to do is this:

tiles_letter = ['a', 'b', 'c', 'd', 'e']

def add_letter():
    rand = random.choice(tiles_letter)
    tile_frame = Label(frame, text=rand)
    tile_frame.pack()
    root.after(500, add_letter)
    tiles_letter.remove(rand)  # remove that tile from list of tiles


root.after(0, add_letter)  # add_letter will run as soon as the mainloop starts.
root.mainloop()

You also need to schedule the function to be called again by repeating the call to after inside the callback function, since after only executes the given function once. This is also noted in the documentation:

The callback is only called once for each call to this method. To keep calling the callback, you need to reregister the callback inside itself

Note that your example will throw an exception as soon as you've exhausted all the entries in tiles_letter, so you need to change your logic to handle that case whichever way you want. The simplest thing would be to add a check at the beginning of add_letter to make sure the list isn't empty, and just return if it is:

def add_letter():
    if not tiles_letter:
        return
    rand = random.choice(tiles_letter)
    tile_frame = Label(frame, text=rand)
    tile_frame.pack()
    root.after(500, add_letter)
    tiles_letter.remove(rand)  # remove that tile from list of tiles

Live-Demo: repl.it

jQuery Dialog Box

I encountered the same issue (dialog would only open once, after closing, it wouldn't open again), and tried the solutions above which did not fix my problem. I went back to the docs and realized I had a fundamental misunderstanding of how the dialog works.

The $('#myDiv').dialog() command creates/instantiates the dialog, but is not necessarily the proper way to open it. The proper way to open it is to instantiate the dialog with dialog(), then use dialog('open') to display it, and dialog('close') to close/hide it. This means you'll probably want to set the autoOpen option to false.

So the process is: instantiate the dialog on document ready, then listen for the click or whatever action you want to show the dialog. Then it will work, time after time!

<script type="text/javascript"> 
        jQuery(document).ready( function(){       
            jQuery("#myButton").click( showDialog );

            //variable to reference window
            $myWindow = jQuery('#myDiv');

            //instantiate the dialog
            $myWindow.dialog({ height: 350,
                width: 400,
                modal: true,
                position: 'center',
                autoOpen:false,
                title:'Hello World',
                overlay: { opacity: 0.5, background: 'black'}
                });
            }

        );
    //function to show dialog   
    var showDialog = function() {
        //if the contents have been hidden with css, you need this
        $myWindow.show(); 
        //open the dialog
        $myWindow.dialog("open");
        }

    //function to close dialog, probably called by a button in the dialog
    var closeDialog = function() {
        $myWindow.dialog("close");
    }


</script>
</head>

<body>

<input id="myButton" name="myButton" value="Click Me" type="button" />
<div id="myDiv" style="display:none">
    <p>I am a modal dialog</p>
</div>

Simulating group_concat MySQL function in Microsoft SQL Server 2005?

No REAL easy way to do this. Lots of ideas out there, though.

Best one I've found:

SELECT table_name, LEFT(column_names , LEN(column_names )-1) AS column_names
FROM information_schema.columns AS extern
CROSS APPLY
(
    SELECT column_name + ','
    FROM information_schema.columns AS intern
    WHERE extern.table_name = intern.table_name
    FOR XML PATH('')
) pre_trimmed (column_names)
GROUP BY table_name, column_names;

Or a version that works correctly if the data might contain characters such as <

WITH extern
     AS (SELECT DISTINCT table_name
         FROM   INFORMATION_SCHEMA.COLUMNS)
SELECT table_name,
       LEFT(y.column_names, LEN(y.column_names) - 1) AS column_names
FROM   extern
       CROSS APPLY (SELECT column_name + ','
                    FROM   INFORMATION_SCHEMA.COLUMNS AS intern
                    WHERE  extern.table_name = intern.table_name
                    FOR XML PATH(''), TYPE) x (column_names)
       CROSS APPLY (SELECT x.column_names.value('.', 'NVARCHAR(MAX)')) y(column_names)

Plot smooth line with PyPlot

Here is a simple solution for dates:

from scipy.interpolate import make_interp_spline
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.dates as dates
from datetime import datetime

data = {
    datetime(2016, 9, 26, 0, 0): 26060, datetime(2016, 9, 27, 0, 0): 23243,
    datetime(2016, 9, 28, 0, 0): 22534, datetime(2016, 9, 29, 0, 0): 22841,
    datetime(2016, 9, 30, 0, 0): 22441, datetime(2016, 10, 1, 0, 0): 23248 
}
#create data
date_np = np.array(list(data.keys()))
value_np = np.array(list(data.values()))
date_num = dates.date2num(date_np)
# smooth
date_num_smooth = np.linspace(date_num.min(), date_num.max(), 100) 
spl = make_interp_spline(date_num, value_np, k=3)
value_np_smooth = spl(date_num_smooth)
# print
plt.plot(date_np, value_np)
plt.plot(dates.num2date(date_num_smooth), value_np_smooth)
plt.show()

How to trigger a build only if changes happen on particular set of files

The Git plugin has an option (excluded region) to use regexes to determine whether to skip building based on whether files in the commit match the excluded region regex.

Unfortunately, the stock Git plugin does not have a "included region" feature at this time (1.15). However, someone posted patches on GitHub that work on Jenkins and Hudson that implement the feature you want.

It is a little work to build, but it works as advertised and has been extremely useful since one of my Git trees has multiple independent projects.

https://github.com/jenkinsci/git-plugin/pull/49

Update: The Git plugin (1.16) now has the 'included' region feature.

StringIO in Python3

In order to make examples from here work with Python 3.5.2, you can rewrite as follows :

import io
data =io.BytesIO(b"1, 2, 3\n4, 5, 6") 
import numpy
numpy.genfromtxt(data, delimiter=",")

The reason for the change may be that the content of a file is in data (bytes) which do not make text until being decoded somehow. genfrombytes may be a better name than genfromtxt.

When should I use Lazy<T>?

A great real-world example of where lazy loading comes in handy is with ORM's (Object Relation Mappers) such as Entity Framework and NHibernate.

Say you have an entity Customer which has properties for Name, PhoneNumber, and Orders. Name and PhoneNumber are regular strings but Orders is a navigation property that returns a list of every order the customer ever made.

You often might want to go through all your customer's and get their name and phone number to call them. This is a very quick and simple task, but imagine if each time you created a customer it automatically went and did a complex join to return thousands of orders. The worst part is that you aren't even going to use the orders so it is a complete waste of resources!

This is the perfect place for lazy loading because if the Order property is lazy it will not go fetch all the customer's order unless you actually need them. You can enumerate the Customer objects getting only their Name and Phone Number while the Order property is patiently sleeping, ready for when you need it.

Genymotion error at start 'Unable to load virtualbox'

FIXED SOLUTION

Run below command in terminal, It denotes where is your virtualbox install on MAC/Linux.

    $ which vboxmanage
    /usr/local/bin/VBoxManage

Genymotion search the virtualBox in /usr/bin/VBoxManage while it is located to /usr/local/bin/VBoxManage , you need to create the symlink to that location , Run in terminal to fix it.

    sudo ln -s /usr/local/bin/VBoxManage /usr/bin/VBoxManage

Uncaught TypeError: Cannot use 'in' operator to search for 'length' in

The only solution that worked for me and $.each was definitely causing the error. so i used for loop and it's not throwing error anymore.

Example code

     $.ajax({
            type: 'GET',
            url: 'https://example.com/api',
            data: { get_param: 'value' },
            success: function (data) {
                for (var i = 0; i < data.length; ++i) {
                    console.log(data[i].NameGerman);
                }
            }
        });

How do I "select Android SDK" in Android Studio?

There are multiple hit & trial solutions for this error. One of them will surely work for you. Below are the solutions:

Tools -> Android -> Sync Project with Gradle Files (Android Studio 3.0.1)

Go to build.gradle and click sync now

Click this icon to sync gradle enter image description here

or edit any of your module gradle and then sync

File -> Settings -> Android SDK -> Android SDK Location Edit -> Android SDK

Open build.gradle file, just add a space or press enter. Then sync project.

File -> Invalidate Caches / Restart

What is PECS (Producer Extends Consumer Super)?

The PECS "rule" just ensures that the following is legal:

Consumer: whatever ? is, it can legally refer to T
Producer: whatever ? is, it can legally be referred to by T

The typical pairing along the lines of List<? extends T> producer, List<? super T> consumer is simply ensuring that the compiler can enforce the standard "IS-A" inheritance relationship rules. If we could do so legally, it might be simpler to say <T extends ?>, <? extends T> (or better yet in Scala, as you can see above, it's [-T], [+T]. Unfortunately the best we can do is <? super T>, <? extends T>.

When I first encountered this and broke it down in my head the mechanics made sense but the code itself continued to look confusing to me - I kept thinking "it seems like the bounds shouldn't need to be inverted like that" - even though I was clear on the above - that it's simply about guaranteeing compliance with the standard rules of reference.

What helped me was looking at it using ordinary assignment as an analogy.

Consider the following (not production ready) toy code:

// copies the elements of 'producer' into 'consumer'
static <T> void copy(List<? extends T> producer, List<? super T> consumer) {
   for(T t : producer)
       consumer.add(t);
}

Illustrating this in terms of the assignment analogy, for consumer the ? wildcard (unknown type) is the reference - the "left hand side" of the assignment - and <? super T> ensures that whatever ? is, T "IS-A" ? - that T can be assigned to it, because ? is a super type (or at most the same type) as T.

For producer the concern is the same it's just inverted: producer's ? wildcard (unknown type) is the referent - the "right hand side" of the assignment - and <? extends T> ensures that whatever ? is, ? "IS-A" T - that it can be assigned to a T, because ? is a sub type (or at least the same type) as T.

Select subset of columns in data.table R

Use with=FALSE:

cols = paste("V", c(1,2,3,5), sep="")

dt[, !cols, with=FALSE]

I suggest going through the "Introduction to data.table" vignette.

Update: From v1.10.2 onwards, you can also do:

dt[, ..cols]

See the first NEWS item under v1.10.2 here for additional explanation.

How to read all files in a folder from Java?

public void listFilesForFolder(final File folder) {
    for (final File fileEntry : folder.listFiles()) {
        if (fileEntry.isDirectory()) {
            listFilesForFolder(fileEntry);
        } else {
            System.out.println(fileEntry.getName());
        }
    }
}

final File folder = new File("/home/you/Desktop");
listFilesForFolder(folder);

Files.walk API is available from Java 8.

try (Stream<Path> paths = Files.walk(Paths.get("/home/you/Desktop"))) {
    paths
        .filter(Files::isRegularFile)
        .forEach(System.out::println);
}

The example uses try-with-resources pattern recommended in API guide. It ensures that no matter circumstances the stream will be closed.

Service vs IntentService in the Android platform

Android IntentService vs Service

1.Service

A Service is invoked using startService().
A Service can be invoked from any thread.
A Service runs background operations on the Main Thread of the Application by default. Hence it can block your Application’s UI.
A Service invoked multiple times would create multiple instances.
A service needs to be stopped using stopSelf() or stopService().
Android service can run parallel operations.

2. IntentService

An IntentService is invoked using Intent.
An IntentService can in invoked from the Main thread only.
An IntentService creates a separate worker thread to run background operations.
An IntentService invoked multiple times won’t create multiple instances.
An IntentService automatically stops after the queue is completed. No need to trigger stopService() or stopSelf().
In an IntentService, multiple intent calls are automatically Queued and they would be executed sequentially.
An IntentService cannot run parallel operation like a Service.

Refer from Here

Ping with timestamp on Windows CLI

@echo off
    ping -t localhost|find /v ""|cmd /q /v:on /c "for /l %%a in (0) do (set "data="&set /p "data="&if defined data echo(!time! !data!)"

note: code to be used inside a batch file. To use from command line replace %%a with %a

Start the ping, force a correct line buffered output (find /v), and start a cmd process with delayed expansion enabled that will do an infinite loop reading the piped data that will be echoed to console prefixed with the current time.

2015-01-08 edited: In faster/newer machines/os versions there is a synchronization problem in previous code, making the set /p read a line while the ping command is still writting it and the result are line cuts.

@echo off
    ping -t localhost|cmd /q /v /c "(pause&pause)>nul & for /l %%a in () do (set /p "data=" && echo(!time! !data!)&ping -n 2 localhost>nul"

Two aditional pause commands are included at the start of the subshell (only one can be used, but as pause consumes a input character, a CRLF pair is broken and a line with a LF is readed) to wait for input data, and a ping -n 2 localhost is included to wait a second for each read in the inner loop. The result is a more stable behaviour and less CPU usage.

NOTE: The inner ping can be replaced with a pause, but then the first character of each readed line is consumed by the pause and not retrieved by the set /p

Rails: How to run `rails generate scaffold` when the model already exists?

You can make use of scaffold_controller and remember to pass the attributes of the model, or scaffold will be generated without the attributes.

rails g scaffold_controller User name email
# or
rails g scaffold_controller User name:string email:string

This command will generate following files:

create  app/controllers/users_controller.rb
invoke  haml
create    app/views/users
create    app/views/users/index.html.haml
create    app/views/users/edit.html.haml
create    app/views/users/show.html.haml
create    app/views/users/new.html.haml
create    app/views/users/_form.html.haml
invoke  test_unit
create    test/controllers/users_controller_test.rb
invoke  helper
create    app/helpers/users_helper.rb
invoke    test_unit
invoke  jbuilder
create    app/views/users/index.json.jbuilder
create    app/views/users/show.json.jbuilder

UnhandledPromiseRejectionWarning: This error originated either by throwing inside of an async function without a catch block

I resolve the problem. It's very simple . if do you checking care the problem may be because the auxiliar variable has whitespace. Why ? I don't know but yus must use the trim() method and will resolve the problem

bundle install fails with SSL certificate verification error

My permanent fix for Windows:

Download the CACert , save as C:\ruby\ssl_certs\GlobalSignRootCA.pem from http://guides.rubygems.org/ssl-certificate-update/
Create system variable named "SSL_CERT_FILE", set to C:\ruby\ssl_certs\GlobalSignRootCA.pem.
Try again: gem install bundler:

C:\gem sources
*** CURRENT SOURCES ***
https://rubygems.org/

C:\gem install bundler
Fetching: bundler-1.13.5.gem (100%)
Successfully installed bundler-1.13.5
1 gem installed

Using .Select and .Where in a single LINQ statement

Did you add the Select() after the Where() or before?

You should add it after, because of the concurrency logic:

 1 Take the entire table  
 2 Filter it accordingly  
 3 Select only the ID's  
 4 Make them distinct.

If you do a Select first, the Where clause can only contain the ID attribute because all other attributes have already been edited out.

Update: For clarity, this order of operators should work:

db.Items.Where(x=> x.userid == user_ID).Select(x=>x.Id).Distinct();

Probably want to add a .toList() at the end but that's optional :)

Regular expression to check if password is "8 characters including 1 uppercase letter, 1 special character, alphanumeric characters"

You can use below class for validation:

public class PasswordValidator{

  private Pattern pattern;
  private Matcher matcher;

  private static final String PASSWORD_PATTERN =
          "((?=.*\\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%]).{6,20})";

  public PasswordValidator(){
      pattern = Pattern.compile(PASSWORD_PATTERN);
  }

  /**
   * Validate password with regular expression
   * @param password password for validation
   * @return true valid password, false invalid password
   */
  public boolean validate(final String password){

      matcher = pattern.matcher(password);
      return matcher.matches();

  }
}

where 6 and 20 are minimum and maximum length for the password.

Magento - Retrieve products with a specific attribute value

I have added line

$this->_productCollection->addAttributeToSelect('releasedate');

app/code/core/Mage/Catalog/Block/Product/List.php on line 95

in function _getProductCollection()

and then call it in

app/design/frontend/default/hellopress/template/catalog/product/list.phtml

By writing code

<div><?php echo $this->__('Release Date: %s', $this->dateFormat($_product->getReleasedate())) ?>
</div>

Now it is working in Magento 1.4.x

Update int column in table with unique incrementing values

You can try :

DECLARE @counter int
SET @counter = 0
UPDATE [table]
SET [column] = @counter, @counter = @counter + 1```

How can I print to the same line?

You can just do

System.out.print("String");

Instead

System.out.println("String");

How can I render inline JavaScript with Jade / Pug?

THIRD VERSION OF MY ANSWER:

Here's a multiple line example of inline Jade Javascript. I don't think you can write it without using a -. This is a flash message example that I use in a partial. Hope this helps!

-if(typeof(info) !== 'undefined')
  -if (info)
    - if(info.length){
      ul
        -info.forEach(function(info){
          li= info
      -})
  -}

Is the code you're trying to get to compile the code in your question?

If so, you don't need two things: first, you don't need to declare that it's Javascript/a script, you can just started coding after typing -; second, after you type -if you don't need to type the { or } either. That's what makes Jade pretty sweet.

--------------ORIGINAL ANSWER BELOW ---------------

Try prepending if with -:

-if(10 == 10)
  //do whatever you want here as long as it's indented two spaces from
   the `-` above

There are also tons of Jade examples at:

https://github.com/visionmedia/jade/blob/master/examples/

How do you get the cursor position in a textarea?

Here's a cross browser function I have in my standard library:

function getCursorPos(input) {
    if ("selectionStart" in input && document.activeElement == input) {
        return {
            start: input.selectionStart,
            end: input.selectionEnd
        };
    }
    else if (input.createTextRange) {
        var sel = document.selection.createRange();
        if (sel.parentElement() === input) {
            var rng = input.createTextRange();
            rng.moveToBookmark(sel.getBookmark());
            for (var len = 0;
                     rng.compareEndPoints("EndToStart", rng) > 0;
                     rng.moveEnd("character", -1)) {
                len++;
            }
            rng.setEndPoint("StartToStart", input.createTextRange());
            for (var pos = { start: 0, end: len };
                     rng.compareEndPoints("EndToStart", rng) > 0;
                     rng.moveEnd("character", -1)) {
                pos.start++;
                pos.end++;
            }
            return pos;
        }
    }
    return -1;
}

Use it in your code like this:

var cursorPosition = getCursorPos($('#myTextarea')[0])

Here's its complementary function:

function setCursorPos(input, start, end) {
    if (arguments.length < 3) end = start;
    if ("selectionStart" in input) {
        setTimeout(function() {
            input.selectionStart = start;
            input.selectionEnd = end;
        }, 1);
    }
    else if (input.createTextRange) {
        var rng = input.createTextRange();
        rng.moveStart("character", start);
        rng.collapse();
        rng.moveEnd("character", end - start);
        rng.select();
    }
}

http://jsfiddle.net/gilly3/6SUN8/

Including one C source file in another?

You can properly include .C or .CPP files into other source files. Depending on your IDE, you can usually prevent double-linkage by looking at the source files properties you want to be included, usually by right clicking on it and clicking properties, and uncheck/check compile/link/exclude from build or whatever option it may be. Or you could not include the file in the project itself, thus the IDE wont even know it exists and wont try to compile it. And with makefiles you simply just wouldn't put the file in it for compiling and linking.

EDIT: Sorry I made it an answer instead of a reply onto other answers :(

Rails 4: before_filter vs. before_action

As we can see in ActionController::Base, before_action is just a new syntax for before_filter.

However all before_filters syntax are deprecated in Rails 5.0 and will be removed in Rails 5.1

Tomcat Server Error - Port 8080 already in use

To get rid of this error just click on server tab on eclipse . You will get list of servers as below image (In my case it was tomcat 8 only)

Double click on the respective server. You will get screen as shown below :-

Now change Conflicting port number. In my case I changed 8080 to 8081 (highlighted portion). Save it (ctrl+s) and hence you can start your server now.

Centering a background image, using CSS

if your not satisfied with the answers above then use this

    * {margin: 0;padding: 0;}

    html
    {
        height: 100%;
    }

    body
    {
        background-image: url("background.png");
        background-repeat: no-repeat;
        background-position: center center;
        background-size: 80%;
    }

Select all DIV text with single mouse click

There is pure CSS4 solution:

.selectable{
    -webkit-touch-callout: all; /* iOS Safari */
    -webkit-user-select: all; /* Safari */
    -khtml-user-select: all; /* Konqueror HTML */
    -moz-user-select: all; /* Firefox */
    -ms-user-select: all; /* Internet Explorer/Edge */
    user-select: all; /* Chrome and Opera */

}

user-select is a CSS Module Level 4 specification, that is currently a draft and non-standard CSS property, but browsers support it well — see #search=user-select.

_x000D_

.selectable{
    -webkit-touch-callout: all; /* iOS Safari */
    -webkit-user-select: all; /* Safari */
    -khtml-user-select: all; /* Konqueror HTML */
    -moz-user-select: all; /* Firefox */
    -ms-user-select: all; /* Internet Explorer/Edge */
    user-select: all; /* Chrome and Opera */

}

_x000D_

<div class="selectable">
click and all this will be selected
</div>

_x000D_

Read more on user-select here on MDN and play with it here in w3scools

SQL DATEPART(dw,date) need monday = 1 and sunday = 7

Another solution is the following:

ISNULL(NULLIF(DATEPART(dw,DateField)-1,0),7)

Send PHP variable to javascript function

A great option is to use jQuery/AJAX. Look at these examples and try them out on your server. In this example, in FILE1.php, note that it is passing a blank value. You can pass a value if you wish, which might look something like this (assuming javascript vars called username and password:

data: 'username='+username+'&password='+password,

In the FILE2.php example, you would retrieve those values like this:

$uname = $_POST['username'];
$pword = $_POST['password'];

Then do your MySQL lookup and return the values thus:

echo 'You are logged in';

This would deliver the message You are logged in to the success function in FILE1.php, and the message string would be stored in the variable called "data". Therefore, the alert(data); line in the success function would alert that message. Of course, you can echo anything that you like, even large amounts of HTML, such as entire table structures.

Here is another good example to review.

The approach is to create your form, and then use jQuery to detect the button press and submit the data to a secondary PHP file via AJAX. The above examples show how to do that.

The secondary PHP file receives the variables (if any are sent) and returns a response (whatever you choose to send). That response then appears in the Success: section of your AJAX call as "data" (in these examples).

The jQuery/AJAX code is javascript, so you have two options: you can place it within <script type="text/javascript"></script> tags within your main PHP document, or you can <?php include "my_javascript_stuff.js"; ?> at the bottom of your PHP document. If you are using jQuery, don't forget to include the jQuery library as in the examples given.

In your case, it sounds like you can pretty much mirror the first example I suggested, sending no data and receiving the response in the AJAX success function. Whatever you need to do with that data, though, you must do inside the success function. Seems a bit weird at first, but it works.

Passing a method as a parameter in Ruby

I would recommend to use ampersand to have an access to named blocks within a function. Following the recommendations given in this article you can write something like this (this is a real scrap from my working program):

  # Returns a valid hash for html form select element, combined of all entities
  # for the given +model+, where only id and name attributes are taken as
  # values and keys correspondingly. Provide block returning boolean if you
  # need to select only specific entities.
  #
  # * *Args*    :
  #   - +model+ -> ORM interface for specific entities'
  #   - +&cond+ -> block {|x| boolean}, filtering entities upon iterations
  # * *Returns* :
  #   - hash of {entity.id => entity.name}
  #
  def make_select_list( model, &cond )
    cond ||= proc { true } # cond defaults to proc { true }
    # Entities filtered by cond, followed by filtration by (id, name)
    model.all.map do |x|
      cond.( x ) ? { x.id => x.name } : {}
    end.reduce Hash.new do |memo, e| memo.merge( e ) end
  end

Afterwerds, you can call this function like this:

@contests = make_select_list Contest do |contest|
  logged_admin? or contest.organizer == @current_user
end

If you don't need to filter your selection, you simply omit the block:

@categories = make_select_list( Category ) # selects all categories

So much for the power of Ruby blocks.

Oracle 12c Installation failed to access the temporary location

The error is caused due to administrative shares are being disabled. If they cannot be enabled then perform the following workaround:

6.2.23 INS-30131 Error When Installing Oracle Database or Oracle Client

If the administrative shares are not enabled when performing a single instance Oracle Database or Oracle Client installation for 12c Release 1 (12.1) on Microsoft Windows 7, Microsoft Windows 8, and Microsoft Windows 10, then the installation fails with an INS-30131 error.

Workaround:

Execute the net share command to ensure that the administrative shares are enabled. If they are disabled, then enable them by following the instructions in the Microsoft Windows documentation. Alternatively, perform the client or server installation by specifying the following options:

For a client installation:

-ignorePrereq -J"-Doracle.install.client.validate.clientSupportedOSCheck=false"

For a server installation:

-ignorePrereq -J"-Doracle.install.db.validate.supportedOSCheck=false"

This issue is tracked with Oracle bug 21452473.

Source: Oracle Database Release Notes (Section 6.2.23)

How to get browser width using JavaScript code?

Update for 2017

My original answer was written in 2009. While it still works, I'd like to update it for 2017. Browsers can still behave differently. I trust the jQuery team to do a great job at maintaining cross-browser consistency. However, it's not necessary to include the entire library. In the jQuery source, the relevant portion is found on line 37 of dimensions.js. Here it is extracted and modified to work standalone:

_x000D_

function getWidth() {_x000D_
  return Math.max(_x000D_
    document.body.scrollWidth,_x000D_
    document.documentElement.scrollWidth,_x000D_
    document.body.offsetWidth,_x000D_
    document.documentElement.offsetWidth,_x000D_
    document.documentElement.clientWidth_x000D_
  );_x000D_
}_x000D_
_x000D_
function getHeight() {_x000D_
  return Math.max(_x000D_
    document.body.scrollHeight,_x000D_
    document.documentElement.scrollHeight,_x000D_
    document.body.offsetHeight,_x000D_
    document.documentElement.offsetHeight,_x000D_
    document.documentElement.clientHeight_x000D_
  );_x000D_
}_x000D_
_x000D_
console.log('Width:  ' +  getWidth() );_x000D_
console.log('Height: ' + getHeight() );

_x000D_

Original Answer

Since all browsers behave differently, you'll need to test for values first, and then use the correct one. Here's a function that does this for you:

function getWidth() {
  if (self.innerWidth) {
    return self.innerWidth;
  }

  if (document.documentElement && document.documentElement.clientWidth) {
    return document.documentElement.clientWidth;
  }

  if (document.body) {
    return document.body.clientWidth;
  }
}

and similarly for height:

function getHeight() {
  if (self.innerHeight) {
    return self.innerHeight;
  }

  if (document.documentElement && document.documentElement.clientHeight) {
    return document.documentElement.clientHeight;
  }

  if (document.body) {
    return document.body.clientHeight;
  }
}

Call both of these in your scripts using getWidth() or getHeight(). If none of the browser's native properties are defined, it will return undefined.

Why do I get a "permission denied" error while installing a gem?

Install rbenv or rvm as your Ruby version manager (I prefer rbenv) via homebrew (ie. brew update & brew install rbenv) but then for example in rbenv's case make sure to add rbenv to your $PATH as instructed here and here.

For a deeper explanation on how rbenv works I recommend this.

How do I read a string entered by the user in C?

On a POSIX system, you probably should use getline if it's available.

You also can use Chuck Falconer's public domain ggets function which provides syntax closer to gets but without the problems. (Chuck Falconer's website is no longer available, although archive.org has a copy, and I've made my own page for ggets.)

Static Vs. Dynamic Binding in Java

Connecting a method call to the method body is known as Binding. As Maulik said "Static binding uses Type(Class in Java) information for binding while Dynamic binding uses Object to resolve binding." So this code :

public class Animal {
    void eat() {
        System.out.println("animal is eating...");
    }
}

class Dog extends Animal {

    public static void main(String args[]) {
        Animal a = new Dog();
        a.eat(); // prints >> dog is eating...
    }

    @Override
    void eat() {
        System.out.println("dog is eating...");
    }
}

Will produce the result: dog is eating... because it is using the object reference to find which method to use. If we change the above code to this:

class Animal {
    static void eat() {
        System.out.println("animal is eating...");
    }
}

class Dog extends Animal {

    public static void main(String args[]) {

        Animal a = new Dog();
        a.eat(); // prints >> animal is eating...

    }

    static void eat() {
        System.out.println("dog is eating...");
    }
}

It will produce : animal is eating... because it is a static method, so it is using Type (in this case Animal) to resolve which static method to call. Beside static methods private and final methods use the same approach.

How to add link to flash banner

@Michiel is correct to create a button but the code for ActionScript 3 it is a little different - where movieClipName is the name of your 'button'.

movieClipName.addEventListener(MouseEvent.CLICK, callLink);
function callLink:void {
  var url:String = "http://site";
  var request:URLRequest = new URLRequest(url);
  try {
    navigateToURL(request, '_blank');
  } catch (e:Error) {
    trace("Error occurred!");
  }
}

source: http://scriptplayground.com/tutorials/as/getURL-in-Actionscript-3/

Git push rejected after feature branch rebase

The following works for me:

git push -f origin branch_name

and it does not remove any of my code.

But, if you want to avoid this then you can do the following:

git checkout master
git pull --rebase
git checkout -b new_branch_name

then you can cherry-pick all your commits to the new branch. git cherry-pick COMMIT ID and then push your new branch.

Why do I get "a label can only be part of a statement and a declaration is not a statement" if I have a variable that is initialized after a label?

The language standard simply doesn't allow for it. Labels can only be followed by statements, and declarations do not count as statements in C. The easiest way to get around this is by inserting an empty statement after your label, which relieves you from keeping track of the scope the way you would need to inside a block.

#include <stdio.h>
int main () 
{
    printf("Hello ");
    goto Cleanup;
Cleanup: ; //This is an empty statement.
    char *str = "World\n";
    printf("%s\n", str);
}

Spring 3 RequestMapping: Get path value

Just found that issue corresponding to my problem. Using HandlerMapping constants I was able to wrote a small utility for that purpose:

/**
 * Extract path from a controller mapping. /controllerUrl/** => return matched **
 * @param request incoming request.
 * @return extracted path
 */
public static String extractPathFromPattern(final HttpServletRequest request){


    String path = (String) request.getAttribute(
            HandlerMapping.PATH_WITHIN_HANDLER_MAPPING_ATTRIBUTE);
    String bestMatchPattern = (String ) request.getAttribute(HandlerMapping.BEST_MATCHING_PATTERN_ATTRIBUTE);

    AntPathMatcher apm = new AntPathMatcher();
    String finalPath = apm.extractPathWithinPattern(bestMatchPattern, path);

    return finalPath;

}

How do I enable index downloads in Eclipse for Maven dependency search?

Tick 'Full Index Enabled' and then 'Rebuild Index' of the central repository in 'Global Repositories' under Window > Show View > Other > Maven > Maven Repositories, and it should work.

The rebuilding may take a long time depending on the speed of your internet connection, but eventually it works.

Click through div to underlying elements

Nope, you can't click ‘through’ an element. You can get the co-ordinates of the click and try to work out what element was underneath the clicked element, but this is really tedious for browsers that don't have document.elementFromPoint. Then you still have to emulate the default action of clicking, which isn't necessarily trivial depending on what elements you have under there.

Since you've got a fully-transparent window area, you'll probably be better off implementing it as separate border elements around the outside, leaving the centre area free of obstruction so you can really just click straight through.

Alter table to modify default value of column

For Sql Azure the following query works :

ALTER TABLE [TableName] ADD  DEFAULT 'DefaultValue' FOR ColumnName
GO

CentOS: Copy directory to another directory

For copy directory use following command

cp -r source    Destination

For example

cp -r  /home/hasan   /opt

For copy file use command without -r

cp   /home/file    /home/hasan/

Generate signed apk android studio

Go to Build -> Generate Signed APK in Android Studio.
In the new window appeared, click on Create new... button.
Next enter details as like shown below and click OK -> Next.
Select the Build Type as release and click Finish button.
Wait until APK generated successfully message is displayed as like shown below.
Click on Show in Explorer to see the signed APK file.

For more details go to this link.

How do you determine the ideal buffer size when using FileInputStream?

Yes, it's probably dependent on various things - but I doubt it will make very much difference. I tend to opt for 16K or 32K as a good balance between memory usage and performance.

Note that you should have a try/finally block in the code to make sure the stream is closed even if an exception is thrown.

How to store the hostname in a variable in a .bat file?

I usually read command output in to variables using the FOR command as it saves having to create temporary files. For example:

FOR /F "usebackq" %i IN (`hostname`) DO SET MYVAR=%i

Note, the above statement will work on the command line but not in a batch file. To use it in batch file escape the % in the FOR statement by putting them twice:

FOR /F "usebackq" %%i IN (`hostname`) DO SET MYVAR=%%i
ECHO %MYVAR%

There's a lot more you can do with FOR. For more details just type HELP FOR at command prompt.

CSS "color" vs. "font-color"

I know this is an old post but as MisterZimbu stated, the color property is defining the values of other properties, as the border-color and, with CSS3, of currentColor.

currentColor is very handy if you want to use the font color for other elements (as the background or custom checkboxes and radios of inner elements for example).

Example:

_x000D_

.element {_x000D_
  color: green;_x000D_
  background: red;_x000D_
  display: block;_x000D_
  width: 200px;_x000D_
  height: 200px;_x000D_
  padding: 0;_x000D_
  margin: 0;_x000D_
}_x000D_
_x000D_
.innerElement1 {_x000D_
  border: solid 10px;_x000D_
  display: inline-block;_x000D_
  width: 60px;_x000D_
  height: 100px;_x000D_
  margin: 10px;_x000D_
}_x000D_
_x000D_
.innerElement2 {_x000D_
  background: currentColor;_x000D_
  display: inline-block;_x000D_
  width: 60px;_x000D_
  height: 100px;_x000D_
  margin: 10px;_x000D_
}

_x000D_

<div class="element">_x000D_
  <div class="innerElement1"></div>_x000D_
  <div class="innerElement2"></div>_x000D_
</div>

_x000D_

How does createOrReplaceTempView work in Spark?

CreateOrReplaceTempView will create a temporary view of the table on memory it is not presistant at this moment but you can run sql query on top of that . if you want to save it you can either persist or use saveAsTable to save.

first we read data in csv format and then convert to data frame and create a temp view

Reading data in csv format

val data = spark.read.format("csv").option("header","true").option("inferSchema","true").load("FileStore/tables/pzufk5ib1500654887654/campaign.csv")

printing the schema

data.printSchema

data.createOrReplaceTempView("Data")

Now we can run sql queries on top the table view we just created

  %sql select Week as Date,Campaign Type,Engagements,Country from Data order     by Date asc

Safest way to convert float to integer in python?

You could use the round function. If you use no second parameter (# of significant digits) then I think you will get the behavior you want.

IDLE output.

>>> round(2.99999999999)
3
>>> round(2.6)
3
>>> round(2.5)
3
>>> round(2.4)
2

jQuery $(".class").click(); - multiple elements, click event once

I just had the same problem. In my case PHP code generated few times the same jQuery code and that was the multiple trigger.

<a href="#popraw" class="report" rel="884(PHP MULTIPLE GENERATER NUMBERS)">Popraw / Zglos</a>

(PHP MULTIPLE GENERATER NUMBERS generated also the same code multiple times)

<script type="text/javascript">
$('.report').click(function(){...});
</script>

My solution was to separate script in another php file and load that file ONE TIME.

How do I convert a String to an InputStream in Java?

Like this:

InputStream stream = new ByteArrayInputStream(exampleString.getBytes(StandardCharsets.UTF_8));

Note that this assumes that you want an InputStream that is a stream of bytes that represent your original string encoded as UTF-8.

For versions of Java less than 7, replace StandardCharsets.UTF_8 with "UTF-8".

How to find and replace with regex in excel

Use Google Sheets instead of Excel - this feature is built in, so you can use regex right from the find and replace dialog.

To answer your question:

Copy the data from Excel and paste into Google Sheets
Use the find and replace dialog with regex
Copy the data from Google Sheets and paste back into Excel

How do you implement a class in C?

GTK is built entirely on C and it uses many OOP concepts. I have read through the source code of GTK and it is pretty impressive, and definitely easier to read. The basic concept is that each "class" is simply a struct, and associated static functions. The static functions all accept the "instance" struct as a parameter, do whatever then need, and return results if necessary. For Example, you may have a function "GetPosition(CircleStruct obj)". The function would simply dig through the struct, extract the position numbers, probably build a new PositionStruct object, stick the x and y in the new PositionStruct, and return it. GTK even implements inheritance this way by embedding structs inside structs. pretty clever.

Stop setInterval

Use a variable and call clearInterval to stop it.

var interval;

$(document).on('ready',function()
  interval = setInterval(updateDiv,3000);
  });

  function updateDiv(){
    $.ajax({
      url: 'getContent.php',
      success: function(data){
        $('.square').html(data);
      },
      error: function(){
        $.playSound('oneday.wav');
        $('.square').html('<span style="color:red">Connection problems</span>');
        // I want to stop it here
        clearInterval(interval);
      }
    });
  }

iPhone Debugging: How to resolve 'failed to get the task for process'?

If you are getting such error, the only reason could be you using a Distribution profile rather than a development profile in Xcode or a missing Entitlement property. If you are not using the Entitlements.plist, then the only possible error could be the app is getting packaged with a distribution profile. You could verify this confirming the build logs. To change this, go to Build Setting of the project and verify Code Signing Entity setting. For debugging to work, this setting should be a developer profile for the configuration that you are currently using.

https://developer.apple.com/library/ios/#qa/qa1682/_index.html

For instant results, delete all mobile provisioning profiles from xcode and install the developer profile that you intend to use.

Populating Spring @Value during Unit Test

In springboot 2.4.1 im just added annotation @SpringBootTest in my test, and obviously, setted spring.profiles.active = test in my src/test/resources/application.yml

Im using @ExtendWith({SpringExtension.class}) and @ContextConfiguration(classes = {RabbitMQ.class, GenericMapToObject.class, ModelMapper.class, StringUtils.class}) for external confs

Angular ng-click with call to a controller function not working

Use alias when defining Controller in your angular configuration. For example: NOTE: I'm using TypeScript here

Just take note of the Controller, it has an alias of homeCtrl.

module MongoAngular {
    var app = angular.module('mongoAngular', ['ngResource', 'ngRoute','restangular']);

    app.config([
        '$routeProvider', ($routeProvider: ng.route.IRouteProvider) => {
            $routeProvider
                .when('/Home', {
                    templateUrl: '/PartialViews/Home/home.html',
                    controller: 'HomeController as homeCtrl'
                })
                .otherwise({ redirectTo: '/Home' });
        }])
        .config(['RestangularProvider', (restangularProvider: restangular.IProvider) => {
        restangularProvider.setBaseUrl('/api');
    }]);
}

And here's the way to use it...

ng-click="homeCtrl.addCustomer(customer)"

Try it.. It might work for you as it worked for me... ;)

What is a typedef enum in Objective-C?

Apple recommends defining enums like this since Xcode 4.4:

typedef enum ShapeType : NSUInteger {
    kCircle,
    kRectangle,
    kOblateSpheroid
} ShapeType;

They also provide a handy macro NS_ENUM:

typedef NS_ENUM(NSUInteger, ShapeType) {
    kCircle,
    kRectangle,
    kOblateSpheroid
};

These definitions provide stronger type checking and better code completion. I could not find official documentation of NS_ENUM, but you can watch the "Modern Objective-C" video from WWDC 2012 session here.

UPDATE
Link to official documentation here.

Python - Check If Word Is In A String

What is wrong with:

if word in mystring: 
   print 'success'

Triggering change detection manually in Angular

I used accepted answer reference and would like to put an example, since Angular 2 documentation is very very hard to read, I hope this is easier:

Import NgZone:

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

Add it to your class constructor

constructor(public zone: NgZone, ...args){}

Run code with zone.run:

this.zone.run(() => this.donations = donations)

Get user profile picture by Id

Through the Javascript SDK (v2.12 - April, 2017) you can get the details of the picture request this way:

FB.api("/" + uid + "/picture?redirect=0", function (response) {
  console.log(response);

  // prints the following:
  //data: {
  //  height: 50
  //  is_silhouette: false
  //  url: "https://lookaside.facebook.com/platform/profilepic/?asid=…&height=50&width=50&ext=…&hash…"
  //  width: 50
  //}

  if (response && !response.error) {
    // change the src attribute of img elements
    [...document.getElementsByClassName('fb-user-img')].forEach(
      i => i.src = response.data.url
    );

    // OR redirect to the URL above
    location.assign(response.data.url);
  }
});

For getting the JSON response the parameter redirect with 0 (zero) as value is important since the request redirects to the image by default. You may still add other parameters in the same URL. Examples:

"/" + uid + "/picture?redirect=0&width=100&height=100": a 100x100 image will be returned;
"/" + uid + "/picture?redirect=0&type=large": a 200x200 image is returned. Other possible type values include: small, normal, album, and square.

How to resolve "local edit, incoming delete upon update" message

Try to resolve the conflict using

svn resolve --accept=working PATH

Format telephone and credit card numbers in AngularJS

Try using phoneformat.js (http://www.phoneformat.com/), you can not only format phone number based on user locales (en-US, ja-JP, fr-FR, de-DE etc) but it also validates the phone number. Its very robust library based on googles libphonenumber project.

"psql: could not connect to server: Connection refused" Error when connecting to remote database

I have struggled with this when trying to remotely connect to a new PostgreSQL installation on my Raspberry Pi. Here's the full breakdown of what I did to resolve this issue:

First, open the PostgreSQL configuration file and make sure that the service is going to listen outside of localhost.

sudo [editor] /etc/postgresql/[version]/main/postgresql.conf

I used nano, but you can use the editor of your choice, and while I have version 9.1 installed, that directory will be for whichever version you have installed.

Search down to the section titled 'Connections and Authentication'. The first setting should be 'listen_addresses', and might look like this:

#listen_addresses = 'localhost'     # what IP address(es) to listen on;

The comments to the right give good instructions on how to change this field, and using the suggested '*' for all will work well.

Please note that this field is commented out with #. Per the comments, it will default to 'localhost', so just changing the value to '*' isn't enough, you also need to uncomment the setting by removing the leading #.

It should now look like this:

listen_addresses = '*'         # what IP address(es) to listen on;

You can also check the next setting, 'port', to make sure that you're connecting correctly. 5432 is the default, and is the port that psql will try to connect to if you don't specify one.

Save and close the file, then open the Client Authentication config file, which is in the same directory:

sudo [editor] /etc/postgresql/[version]/main/pg_hba.conf

I recommend reading the file if you want to restrict access, but for basic open connections you'll jump to the bottom of the file and add a line like this:

host all all all md5

You can press tab instead of space to line the fields up with the existing columns if you like.

Personally, I instead added a row that looked like this:

host [database_name] pi 192.168.1.0/24 md5

This restricts the connection to just the one user and just the one database on the local area network subnet.

Once you've saved changes to the file you will need to restart the service to implement the changes.

sudo service postgresql restart

Now you can check to make sure that the service is openly listening on the correct port by using the following command:

sudo netstat -ltpn

If you don't run it as elevated (using sudo) it doesn't tell you the names of the processes listening on those ports.

One of the processes should be Postgres, and the Local Address should be open (0.0.0.0) and not restricted to local traffic only (127.0.0.1). If it isn't open, then you'll need to double check your config files and restart the service. You can again confirm that the service is listening on the correct port (default is 5432, but your configuration could be different).

Finally you'll be able to successfully connect from a remote computer using the command:

psql -h [server ip address] -p [port number, optional if 5432] -U [postgres user name] [database name]

IIS error, Unable to start debugging on the webserver

Just to add, I had this issue, and fixed by disabling the Load User Profile option (unsure of any side effects). This is found through Advanced Settings for the Application Pool.

This then made it work for me.

Microsoft Advertising SDK doesn't deliverer ads

I only use MicrosoftAdvertising.Mobile and Microsoft.Advertising.Mobile.UI and I am served ads. The SDK should only add the DLLs not reference itself.

Note: You need to explicitly set width and height Make sure the phone dialer, and web browser capabilities are enabled

Followup note: Make sure that after you've removed the SDK DLL, that the xmlns references are not still pointing to it. The best route to take here is

Remove the XAML for the ad
Remove the xmlns declaration (usually at the top of the page, but sometimes will be declared in the ad itself)
Remove the bad DLL (the one ending in .SDK )
Do a Clean and then Build (clean out anything remaining from the DLL)
Add the xmlns reference (actual reference is below)
Add the ad to the page (example below)

Here is the xmlns reference:

xmlns:AdNamepace="clr-namespace:Microsoft.Advertising.Mobile.UI;assembly=Microsoft.Advertising.Mobile.UI"

Then the ad itself:

<AdNamespace:AdControl x:Name="myAd" Height="80" Width="480"                    AdUnitId="yourAdUnitIdHere" ApplicationId="yourIdHere"/>

Converting a list to a set changes element order

You can remove the duplicated values and keep the list order of insertion with one line of code, Python 3.8.2

mylist = ['b', 'b', 'a', 'd', 'd', 'c']


results = list({value:"" for value in mylist})

print(results)

>>> ['b', 'a', 'd', 'c']

results = list(dict.fromkeys(mylist))

print(results)

>>> ['b', 'a', 'd', 'c']

Creating a div element inside a div element in javascript

Yes, you either need to do this onload or in a <script> tag after the closing </body> tag, when the lc element is already found in the document's DOM tree.

How to sort multidimensional array by column?

You can use list.sort with its optional key parameter and a lambda expression:

>>> lst = [
...     ['John',2],
...     ['Jim',9],
...     ['Jason',1]
... ]
>>> lst.sort(key=lambda x:x[1])
>>> lst
[['Jason', 1], ['John', 2], ['Jim', 9]]
>>>

This will sort the list in-place.

Note that for large lists, it will be faster to use operator.itemgetter instead of a lambda:

>>> from operator import itemgetter
>>> lst = [
...     ['John',2],
...     ['Jim',9],
...     ['Jason',1]
... ]
>>> lst.sort(key=itemgetter(1))
>>> lst
[['Jason', 1], ['John', 2], ['Jim', 9]]
>>>

PHP: Show yes/no confirmation dialog

You can handle the attribute onClick for both i.e. 'ok' & 'cancel' condition like ternary operator

Scenario: Here is the scenario that I wants to show confirm box which will ask for 'ok' or 'cancel' while performing a delete action. In that I want if user click on 'ok' then the form action will redirect to page location and on cancel page will not respond.

Adding further explanation i'm having one button with type="submit" which is originally use default form action of form tag. and I want above scenario on delete button with same input type.

So below code is working properly for me

onClick="return confirm('Are you sure you want to Delete ?')?this.form.action='<?php echo $_SERVER['PHP_SELF'] ?>':false;"

Full code

<input type="submit" name="action" id="Delete" value="Delete" onClick="return confirm('Are you sure you want to Delete ?')?this.form.action='<?php echo $_SERVER['PHP_SELF'] ?>':false;">

And by the way I'm implementing this code as inline in html element using PHP. so that's why I used 'echo $_SERVER['PHP_SELF']'.

I hope it will work for you also. Thank You

canvas.toDataURL() SecurityError

Unless google serves this image with the correct Access-Control-Allow-Origin header, then you wont be able to use their image in canvas. This is due to not having CORS approval. You can read more about this here, but it essentially means:

Although you can use images without CORS approval in your canvas, doing so taints the canvas. Once a canvas has been tainted, you can no longer pull data back out of the canvas. For example, you can no longer use the canvas toBlob(), toDataURL(), or getImageData() methods; doing so will throw a security error.

This protects users from having private data exposed by using images to pull information from remote web sites without permission.

I suggest just passing the URL to your server-side language and using curl to download the image. Be careful to sanitise this though!

EDIT:

As this answer is still the accepted answer, you should check out @shadyshrif's answer, which is to use:

var img = new Image();
img.setAttribute('crossOrigin', 'anonymous');
img.src = url;

This will only work if you have the correct permissions, but will at least allow you to do what you want.

WebView link click open default browser

you can use Intent for this:

Intent browserIntent = new Intent("android.intent.action.VIEW", Uri.parse("your Url"));
startActivity(browserIntent);

java.io.FileNotFoundException: the system cannot find the file specified

Relative paths can be used, but they can be tricky. The best solution is to know where your files are being saved, that is, print the folder:

import java.io.File;
import java.util.*;

public class Hangman1 {

    public static void main(String[] args) throws Exception {
        File myFile = new File("word.txt");
        System.out.println("Attempting to read from file in: "+myFile.getCanonicalPath());

        Scanner input = new Scanner(myFile);
        String in = "";
        in = input.nextLine();
    }

}

This code should print the folder where it is looking for. Place the file there and you'll be good to go.

go get results in 'terminal prompts disabled' error for github private repo

If you just want go get to work real fast, and move along with your work...

Just export GIT_TERMINAL_PROMPT=1

$ export GIT_TERMINAL_PROMPT=1
$ go get [whatever]

It will now prompt you for a user/pass for the rest of your shell session. Put this in your .profile or setup git as above for a more permanent solution.

SQL conditional SELECT

In SQL, you do it this way:

SELECT  CASE WHEN @selectField1 = 1 THEN Field1 ELSE NULL END,
        CASE WHEN @selectField2 = 1 THEN Field2 ELSE NULL END
FROM    Table

Relational model does not imply dynamic field count.

Instead, if you are not interested in a field value, you just select a NULL instead and parse it on the client.

How to get file path in iPhone app

If your tiles are not in your bundle, either copied from the bundle or downloaded from the internet you can get the directory like this

NSString *documentdir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *tileDirectory = [documentdir stringByAppendingPathComponent:@"xxxx/Tiles"];
NSLog(@"Tile Directory: %@", tileDirectory);

How do I fix MSB3073 error in my post-build event?

Playing around with different project properties, I found that the project build order was the problem. The project that generated the files I wanted to copy was built second, but the project that was running the batch file as a post-build event was built first, so I simply attached the build event to the second project instead, and it works just fine. Thanks for your help, everyone, though.

PHP compare two arrays and get the matched values not the difference

I think the better answer for this questions is

array_diff()

because it Compares array against one or more other arrays and returns the values in array that are not present in any of the other arrays.

Whereas

array_intersect() returns an array containing all the values of array that are present in all the arguments. Note that keys are preserved.

How do I format axis number format to thousands with a comma in matplotlib?

If you like it hacky and short you can also just update the labels

def update_xlabels(ax):
    xlabels = [format(label, ',.0f') for label in ax.get_xticks()]
    ax.set_xticklabels(xlabels)

update_xlabels(ax)
update_xlabels(ax2)

Flutter: RenderBox was not laid out

Wrap your ListView in an Expanded widget

 Expanded(child:MyListView())

How to use Java property files?

Here is another way to iterate over the properties:

Enumeration eProps = properties.propertyNames();
while (eProps.hasMoreElements()) { 
    String key = (String) eProps.nextElement(); 
    String value = properties.getProperty(key); 
    System.out.println(key + " => " + value); 
}

How to sort a file in-place

The sort command prints the result of the sorting operation to standard output by default. In order to achieve an "in-place" sort, you can do this:

sort -o file file

This overwrites the input file with the sorted output. The -o switch, used to specify an output, is defined by POSIX, so should be available on all version of sort:

-o Specify the name of an output file to be used instead of the standard output. This file can be the same as one of the input files.

If you are unfortunate enough to have a version of sort without the -o switch (Luis assures me that they exist), you can achieve an "in-place" edit in the standard way:

sort file > tmp && mv tmp file

JavaScript: get code to run every minute

Using setInterval:

setInterval(function() {
    // your code goes here...
}, 60 * 1000); // 60 * 1000 milsec

The function returns an id you can clear your interval with clearInterval:

var timerID = setInterval(function() {
    // your code goes here...
}, 60 * 1000); 

clearInterval(timerID); // The setInterval it cleared and doesn't run anymore.

A "sister" function is setTimeout/clearTimeout look them up.

If you want to run a function on page init and then 60 seconds after, 120 sec after, ...:

function fn60sec() {
    // runs every 60 sec and runs on init.
}
fn60sec();
setInterval(fn60sec, 60*1000);

Is it possible to have multiple styles inside a TextView?

The list of supported tags is:

If you use a string resource, you can add some simple styling, such as bold or italic using HTML notation. The currently supported tags are: B (bold), I (italic), U (underline), TT (monospace), BIG, SMALL, SUP (superscript), SUB (subscript), and STRIKE (strikethrough). So, for example, in res/values/strings.xml you could declare this:
<resource>
    <string id="@+id/styled_welcome_message">We are <b><i>so</i></b> glad to see you.</string>
</resources>

(From http://developer.android.com/guide/faq/commontasks.html#selectingtext — Web Archive link, <resource> typo is in original!)

It also shows that Html.fromHtml isn't really needed in simple cases.

PHP String to Float

If you need to handle values that cannot be converted separately, you can use this method:

try {
    $valueToUse = trim($stringThatMightBeNumeric) + 0;
} catch (\Throwable $th) {
    // bail here if you need to
}

Using regular expression in css?

You can manage selecting those elements without any form of regex as the previous answers show, but to answer the question directly, yes you can use a form of regex in selectors:

#sections div[id^='s'] {
    color: red;  
}

That says select any div elements inside the #sections div that have an ID starting with the letter 's'.

See fiddle here.

W3 CSS selector docs here.

Microsoft Azure: How to create sub directory in a blob container

Wanted to add the UI portal Way to do as well. In case you want to create the folder structure, you would have to do it with the complete path for each file.

You need to Click on Upload Blob, Expand the Advanced and put it the path saying "Upload to Folder"

So Lets say you have a folder assets you want to upload and the content of the folder look like below

And if you have a folder under js folder with name main.js, you need to type in the path "assets/js" in upload to folder. Now This has to be done for each file. In case you have a lot of file, its recommended you do it programmatically.

cell format round and display 2 decimal places

Use this

&TEXT(E5;"0.00")&

Replace words in a string - Ruby

You can try using this way :

sentence ["Robert"] = "Roger"

Then the sentence will become :

sentence = "My name is Roger" # Robert is replaced with Roger

How to call webmethod in Asp.net C#

I'm not sure why that isn't working, It works fine on my test. But here is an alternative technique that might help.

Instead of calling the method in the AJAX url, just use the page .aspx url, and add the method as a parameter in the data object. Then when it calls page_load, your data will be in the Request.Form variable.

jQuery

jQuery.ajax({
    url: 'AddToCart.aspx',
    type: "POST",
    data: {
        method: 'AddTo_Cart', quantity: total_qty, itemId: itemId
    },
    dataType: "json",
    beforeSend: function () {
        alert("Start!!! ");
    },
    success: function (data) {
        alert("a");
    },
    failure: function (msg) { alert("Sorry!!! "); }
});

C# Page Load:

if (!Page.IsPostBack)
{
    if (Request.Form["method"] == "AddTo_Cart")
    {
        int q, id;
        int.TryParse(Request.Form["quantity"], out q);
        int.TryParse(Request.Form["itemId"], out id);
        AddTo_Cart(q,id);
    }
}

Is there functionality to generate a random character in Java?

private static char rndChar () {
    int rnd = (int) (Math.random() * 52); // or use Random or whatever
    char base = (rnd < 26) ? 'A' : 'a';
    return (char) (base + rnd % 26);

}

Generates values in the ranges a-z, A-Z.

HTTP Error 403.14 - Forbidden - The Web server is configured to not list the contents of this directory

I solved my problem with fallow this steps =>

Open IIS Manager
Click the Application
Click Directory Browsing
Click Open Feature (On the right you will see under Actions)
Click Enable

how to get the last part of a string before a certain character?

Difference between split and partition is split returns the list without delimiter and will split where ever it gets delimiter in string i.e.

x = 'http://test.com/lalala-134-431'

a,b,c = x.split(-)
print(a)
"http://test.com/lalala"
print(b)
"134"
print(c)
"431"

and partition will divide the string with only first delimiter and will only return 3 values in list

x = 'http://test.com/lalala-134-431'
a,b,c = x.partition('-')
print(a)
"http://test.com/lalala"
print(b)
"-"
print(c)
"134-431"

so as you want last value you can use rpartition it works in same way but it will find delimiter from end of string

x = 'http://test.com/lalala-134-431'
a,b,c = x.partition('-')
print(a)
"http://test.com/lalala-134"
print(b)
"-"
print(c)
"431"

How to convert URL parameters to a JavaScript object?

Another solution based on the latest standard of URLSearchParams (https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams)

function getQueryParamsObject() {
  const searchParams = new URLSearchParams(location.search.slice(1));
  return searchParams
    ? _.fromPairs(Array.from(searchParams.entries()))
    : {};
}

Please note that this solution is making use of

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

and _.fromPairs (https://lodash.com/docs#fromPairs) of lodash for the sake of simplicity.

It should be easy to create a more compatible solution since you have access to searchParams.entries() iterator.

How do I change a TCP socket to be non-blocking?

I know it's an old question, but for everyone on google ending up here looking for information on how to deal with blocking and non-blocking sockets here is an in depth explanation of the different ways how to deal with the I/O modes of sockets - http://dwise1.net/pgm/sockets/blocking.html.

Quick summary:

So Why do Sockets Block?
What are the Basic Programming Techniques for Dealing with Blocking Sockets?
- Have a design that doesn't care about blocking
- Using select
- Using non-blocking sockets.
- Using multithreading or multitasking

Calendar.getInstance(TimeZone.getTimeZone("UTC")) is not returning UTC time

    Following code is the simple example to change the timezone

public static void main(String[] args) {
          //get time zone
          TimeZone timeZone1 = TimeZone.getTimeZone("Asia/Colombo");
          Calendar calendar = new GregorianCalendar();
          //setting required timeZone
          calendar.setTimeZone(timeZone1);
          System.out.println("Time :" + calendar.get(Calendar.HOUR_OF_DAY)+":"+calendar.get(Calendar.MINUTE)+":"+calendar.get(Calendar.SECOND));

       }

if you want see the list of timezones, here is the follwing code

public static void main(String[] args) {

    String[] ids = TimeZone.getAvailableIDs();
    for (String id : ids) {
        System.out.println(displayTimeZone(TimeZone.getTimeZone(id)));
    }

    System.out.println("\nTotal TimeZone ID " + ids.length);

}

private static String displayTimeZone(TimeZone tz) {

    long hours = TimeUnit.MILLISECONDS.toHours(tz.getRawOffset());
    long minutes = TimeUnit.MILLISECONDS.toMinutes(tz.getRawOffset())
                              - TimeUnit.HOURS.toMinutes(hours);
    // avoid -4:-30 issue
    minutes = Math.abs(minutes);

    String result = "";
    if (hours > 0) {
        result = String.format("(GMT+%d:%02d) %s", hours, minutes, tz.getID());
    } else {
        result = String.format("(GMT%d:%02d) %s", hours, minutes, tz.getID());
    }

    return result;

}

How to make a text box have rounded corners?

This can be done with CSS3:

<input type="text" />

input
{
  -moz-border-radius: 15px;
 border-radius: 15px;
    border:solid 1px black;
    padding:5px;
}

http://jsfiddle.net/UbSkn/1/

However, an alternative would be to put the input inside a div with a rounded background, and no border on the input

What does the DOCKER_HOST variable do?

It points to the docker host! I followed these steps:

$ boot2docker start

Waiting for VM and Docker daemon to start...
..............................
Started.

To connect the Docker client to the Docker daemon, please set:
    export DOCKER_HOST=tcp://192.168.59.103:2375

$ export DOCKER_HOST=tcp://192.168.59.103:2375

$ docker run ubuntu:14.04 /bin/echo 'Hello world'
Unable to find image 'ubuntu:14.04' locally
Pulling repository ubuntu
9cbaf023786c: Download complete 
511136ea3c5a: Download complete 
97fd97495e49: Download complete 
2dcbbf65536c: Download complete 
6a459d727ebb: Download complete 
8f321fc43180: Download complete 
03db2b23cf03: Download complete 
Hello world

See:
http://docs.docker.com/userguide/dockerizing/

ListBox with ItemTemplate (and ScrollBar!)

Thnaks for answer. I tried it myself too to an Empty Project and - lo behold allmighty creator of heaven and seven seas - it worked. I originally had ListBox inside which was inside of root . For some reason ListBox doesn't like being inside of StackPanel, at all! =)

-pom-

How to compare two floating point numbers in Bash?

You can use awk combined with a bash if condition:

if awk 'BEGIN {exit !('$d1' >= '$d2')}'; then
    echo "yes"
else 
    echo "no"
fi

Best way to list files in Java, sorted by Date Modified?

Imports :

org.apache.commons.io.comparator.LastModifiedFileComparator

Apache Commons

Code :

public static void main(String[] args) throws IOException {
        File directory = new File(".");
        // get just files, not directories
        File[] files = directory.listFiles((FileFilter) FileFileFilter.FILE);

        System.out.println("Default order");
        displayFiles(files);

        Arrays.sort(files, LastModifiedFileComparator.LASTMODIFIED_COMPARATOR);
        System.out.println("\nLast Modified Ascending Order (LASTMODIFIED_COMPARATOR)");
        displayFiles(files);

        Arrays.sort(files, LastModifiedFileComparator.LASTMODIFIED_REVERSE);
        System.out.println("\nLast Modified Descending Order (LASTMODIFIED_REVERSE)");
        displayFiles(files);

    }

How to highlight cell if value duplicate in same column for google spreadsheet?

Try this:

Select the whole column
Click Format
Click Conditional formatting
Click Add another rule (or edit the existing/default one)
Set Format cells if to: Custom formula is
Set value to: =countif(A:A,A1)>1 (or change A to your chosen column)
Set the formatting style.
Ensure the range applies to your column (e.g., A1:A100).
Click Done

Anything written in the A1:A100 cells will be checked, and if there is a duplicate (occurs more than once) then it'll be coloured.

For locales using comma (,) as a decimal separator, the argument separator is most likely a semi-colon (;). That is, try: =countif(A:A;A1)>1, instead.

For multiple columns, use countifs.

Passing parameter to controller from route in laravel

You don't need anything special for adding paramaters. Just like you had it.

Route::get('groups/(:any)', array('as' => 'group', 'uses' => 'groups@show'));


class Groups_Controller extends Base_Controller {

    public $restful = true;    

    public function get_show($groupID) {
        return 'I am group id ' . $groupID;
    }  


}

Set min-width either by content or 200px (whichever is greater) together with max-width

The problem is that flex: 1 sets flex-basis: 0. Instead, you need

.container .box {
  min-width: 200px;
  max-width: 400px;
  flex-basis: auto; /* default value */
  flex-grow: 1;
}

_x000D_

.container {_x000D_
  display: -webkit-flex;_x000D_
  display: flex;_x000D_
  -webkit-flex-wrap: wrap;_x000D_
  flex-wrap: wrap;_x000D_
}_x000D_
_x000D_
.container .box {_x000D_
  -webkit-flex-grow: 1;_x000D_
  flex-grow: 1;_x000D_
  min-width: 100px;_x000D_
  max-width: 400px;_x000D_
  height: 200px;_x000D_
  background-color: #fafa00;_x000D_
  overflow: hidden;_x000D_
}

_x000D_

<div class="container">_x000D_
  <div class="box">_x000D_
    <table>_x000D_
      <tr>_x000D_
        <td>Content</td>_x000D_
        <td>Content</td>_x000D_
        <td>Content</td>_x000D_
      </tr>_x000D_
    </table>    _x000D_
  </div>_x000D_
  <div class="box">_x000D_
    <table>_x000D_
      <tr>_x000D_
        <td>Content</td>_x000D_
      </tr>_x000D_
    </table>    _x000D_
  </div>_x000D_
  <div class="box">_x000D_
    <table>_x000D_
      <tr>_x000D_
        <td>Content</td>_x000D_
        <td>Content</td>_x000D_
      </tr>_x000D_
    </table>    _x000D_
  </div>_x000D_
</div>

_x000D_

Difference in System. exit(0) , System.exit(-1), System.exit(1 ) in Java

Here is the answer.

System.exit(0);// normal termination - Successful - zero
System.exit(-1);//Exit with some Error
System.exit(1);//one or any positive integer // exit with some Information message

json_encode is returning NULL?

few day ago I have the SAME problem with 1 table.

Firstly try:

echo json_encode($rows);
echo json_last_error();  // returns 5 ?

If last line returns 5, problem is with your data. I know, your tables are in UTF-8, but not entered data. For example the input was in txt file, but created on Win machine with stupid encoding (in my case Win-1250 = CP1250) and this data has been entered into the DB.

Solution? Look for new data (excel, web page), edit source txt file via PSPad (or whatever else), change encoding to UTF-8, delete all rows and now put data from original. Save. Enter into DB.

You can also only change encoding to utf-8 and then change all rows manually (give cols with special chars - desc, ...). Good for slaves...

Adding default parameter value with type hint in Python

If you're using typing (introduced in Python 3.5) you can use typing.Optional, where Optional[X] is equivalent to Union[X, None]. It is used to signal that the explicit value of None is allowed . From typing.Optional:

def foo(arg: Optional[int] = None) -> None:
    ...

How to change maximum number of POST variable in PHP?

Is there a constraint that restricts my generic method to numeric types?

C# does not support this. Hejlsberg has described the reasons for not implementing the feature in an interview with Bruce Eckel:

And it's not clear that the added complexity is worth the small yield that you get. If something you want to do is not directly supported in the constraint system, you can do it with a factory pattern. You could have a Matrix<T>, for example, and in that Matrix you would like to define a dot product method. That of course that means you ultimately need to understand how to multiply two Ts, but you can't say that as a constraint, at least not if T is int, double, or float. But what you could do is have your Matrix take as an argument a Calculator<T>, and in Calculator<T>, have a method called multiply. You go implement that and you pass it to the Matrix.

However, this leads to fairly convoluted code, where the user has to supply their own Calculator<T> implementation, for each T that they want to use. As long as it doesn’t have to be extensible, i.e. if you just want to support a fixed number of types, such as int and double, you can get away with a relatively simple interface:

var mat = new Matrix<int>(w, h);

(Minimal implementation in a GitHub Gist.)

However, as soon as you want the user to be able to supply their own, custom types, you need to open up this implementation so that the user can supply their own Calculator instances. For instance, to instantiate a matrix that uses a custom decimal floating point implementation, DFP, you’d have to write this code:

var mat = new Matrix<DFP>(DfpCalculator.Instance, w, h);

… and implement all the members for DfpCalculator : ICalculator<DFP>.

An alternative, which unfortunately shares the same limitations, is to work with policy classes, as discussed in Sergey Shandar’s answer.

When to use throws in a Java method declaration?

The code that you looked at is not ideal. You should either:

Catch the exception and handle it; in which case the throws is unnecesary.
Remove the try/catch; in which case the Exception will be handled by a calling method.
Catch the exception, possibly perform some action and then rethrow the exception (not just the message)

Use tab to indent in textarea

var textareas = document.getElementsByTagName('textarea');
var count = textareas.length;
for(var i=0;i<count;i++){
    textareas[i].onkeydown = function(e){
        if(e.keyCode==9 || e.which==9){
            e.preventDefault();
            var s = this.selectionStart;
            this.value = this.value.substring(0,this.selectionStart) + "\t" + this.value.substring(this.selectionEnd);
            this.selectionEnd = s+1; 
        }
    }
}

This solution does not require jQuery and will enable tab functionality on all textareas on a page.

WaitAll vs WhenAll

As an example of the difference -- if you have a task the does something with the UI thread (e.g. a task that represents an animation in a Storyboard) if you Task.WaitAll() then the UI thread is blocked and the UI is never updated. if you use await Task.WhenAll() then the UI thread is not blocked, and the UI will be updated.

How do I convert a org.w3c.dom.Document object to a String?

This worked for me, as documented on this page:

TransformerFactory tf = TransformerFactory.newInstance();
Transformer trans = tf.newTransformer();
StringWriter sw = new StringWriter();
trans.transform(new DOMSource(document), new StreamResult(sw));
return sw.toString();

How to copy a dictionary and only edit the copy

>>> dict2 = dict1
# dict2 is bind to the same Dict object which binds to dict1, so if you modify dict2, you will modify the dict1

There are many ways to copy Dict object, I simply use

dict_1 = {
           'a':1,
           'b':2
         }
dict_2 = {}
dict_2.update(dict_1)

Please initialize the log4j system properly warning

Add the code

BasicConfigurator.configure();

in your static main class as below..

Note: add " \hadoop-2.7.1\share\hadoop\common\lib\commons-logging-1.1.3.jar & \hadoop-2.7.1\share\hadoop\common\lib\log4j-1.2.17.jar " as the external references

import org.apache.log4j.BasicConfigurator;

public class ViewCountDriver extends Configured implements Tool{

    public static void main(String[]args) throws Exception{

        BasicConfigurator.configure(); 

        int exitcode = ToolRunner.run(new ViewCountDriver(), args);
        System.exit(exitcode); 
    }
}

Counting no of rows returned by a select query

The syntax error is just due to a missing alias for the subquery:

select COUNT(*) from
(
select m.Company_id
from Monitor as m
    inner join Monitor_Request as mr on mr.Company_ID=m.Company_id
    group by m.Company_id
    having COUNT(m.Monitor_id)>=5)  mySubQuery  /* Alias */

VBA - Run Time Error 1004 'Application Defined or Object Defined Error'

Solution #1: Your statement

.Range(Cells(RangeStartRow, RangeStartColumn), Cells(RangeEndRow, RangeEndColumn)).PasteSpecial xlValues

does not refer to a proper Range to act upon. Instead,

.Range(.Cells(RangeStartRow, RangeStartColumn), .Cells(RangeEndRow, RangeEndColumn)).PasteSpecial xlValues

does (and similarly in some other cases).

Solution #2: Activate Worksheets("Cable Cards") prior to using its cells.

Explanation: Cells(RangeStartRow, RangeStartColumn) (e.g.) gives you a Range, that would be ok, and that is why you often see Cells used in this way. But since it is not applied to a specific object, it applies to the ActiveSheet. Thus, your code attempts using .Range(rng1, rng2), where .Range is a method of one Worksheet object and rng1 and rng2 are in a different Worksheet.

There are two checks that you can do to make this quite evident:

Activate your Worksheets("Cable Cards") prior to executing your Sub and it will start working (now you have well-formed references to Ranges). For the code you posted, adding .Activate right after With... would indeed be a solution, although you might have a similar problem somewhere else in your code when referring to a Range in another Worksheet.
With a sheet other than Worksheets("Cable Cards") active, set a breakpoint at the line throwing the error, start your Sub, and when execution breaks, write at the immediate window

Debug.Print Cells(RangeStartRow, RangeStartColumn).Address(external:=True)

Debug.Print .Cells(RangeStartRow, RangeStartColumn).Address(external:=True)

and see the different outcomes.

Conclusion: Using Cells or Range without a specified object (e.g., Worksheet, or Range) might be dangerous, especially when working with more than one Sheet, unless one is quite sure about what Sheet is active.

python pip on Windows - command 'cl.exe' failed

If you want it really easy and a joy to automate, check out Chocolatey.org/install and you can basically copy and paste these commands and tweak it based on what versions of VC++ you need.

This command is taken from https://chocolatey.org/install

Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; iex ((New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1'))

Once you have chocolatey installed you can either close and reopen your Powershell terminal or run this command:

Import-Module "$env:ChocolateyInstall\helpers\chocolateyInstaller.psm1" ; Update-SessionEnvironment

Now you can use Chocolatey to install Python (latest version of 3.x is default).

choco install python

# This next command installs the latest VisualStudio installer that lets you get specific versions of the build
# Microsoft has replaced the 2015 and 2017 installer links with this one, and we can still use it to install the 2015 and 2017 components

choco install visualstudio2019buildtools --package-parameters "--add Microsoft.VisualStudio.Component.VC.140 --passive --locale en-US --add Microsoft.VisualStudio.Component.Windows10SDK.$($PSVersionTable.BuildVersion.Build) --no-includeRecommended" -y --timeout 0

# Usually need the "unlimited" timeout aka "0" because Visual Studio Installer takes forever

# Tool portion
# Microsoft.VisualStudio.Product.BuildTools
# Component portion(s)
# Microsoft.VisualStudio.Component.VC.140
# Win10SDK needs to match your current Win10 build version
# $($PSVersionTable.BuildVersion.Build)
# Microsoft.VisualStudio.Component.Windows10SDK.$($PSVersionTable.BuildVersion.Build)

# Because VS2019 Build Tools are dumb, need to manually link a couple files between the SDK and the VC++ dirs
# You may need to tweak the version here, but it has been updated to be as dynamic as possible 
# Use an elevated Powershell or elevated cmd prompt (if using cmd.exe just use the bits after /c)
cmd /c mklink "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\x86_amd64\rc.exe" "C:\Program Files (x86)\Windows Kits\10\bin\$($PSVersionTable.BuildVersion.Major).$($PSVersionTable.BuildVersion.Minor).$($PSVersionTable.BuildVersion.Build).0\x64\rc.exe"

cmd /c mklink "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\x86_amd64\rcdll.dll" "C:\Program Files (x86)\Windows Kits\10\bin\$($PSVersionTable.BuildVersion.Major).$($PSVersionTable.BuildVersion.Minor).$($PSVersionTable.BuildVersion.Build).0\x64\rcdll.dll"

Once you have this installed, you should reboot. I've occasionally had things work without a reboot, but your pip install commands will work best if you reboot first.

Now you can pip install pipenv or pip install complex-package and should be good to go.

<embed> vs. <object>

Some other options:

<object type="application/pdf" data="filename.pdf" width="100%" height="100%">
</object>

<object type="application/pdf" data="#request.localhost#_includes/filename.pdf" 
        width="100%" height="100%">
  <param name="src" value="#request.localhost#_includes/filename.pdf">
</object>

Delete empty lines using sed

Another option without sed, awk, perl, etc

strings $file > $output

strings - print the strings of printable characters in files.

What is the difference between Python and IPython?

Even after viewing this thread, I had thought that ipython was a synonym for the python shell, in other words that typing python at the command line put one into ipython mode.

It is in fact, as referenced above, a very cool interactive shell (command line program) that can be installed from iPython.org or simply by running

pip install ipython

or the more extensive:

pip install ipython[notebook]

from the command line.

What's the difference between struct and class in .NET?

Instances of classes are stored on the managed heap. All variables 'containing' an instance are simply a reference to the instance on the heap. Passing an object to a method results in a copy of the reference being passed, not the object itself.

Structures (technically, value types) are stored wherever they are used, much like a primitive type. The contents may be copied by the runtime at any time and without invoking a customised copy-constructor. Passing a value type to a method involves copying the entire value, again without invoking any customisable code.

The distinction is made better by the C++/CLI names: "ref class" is a class as described first, "value class" is a class as described second. The keywords "class" and "struct" as used by C# are simply something that must be learned.

PHPExcel how to set cell value dynamically

I asume you have connected to your database already.

$sql = "SELECT * FROM my_table";
$result = mysql_query($sql);

$row = 1; // 1-based index
while($row_data = mysql_fetch_assoc($result)) {
    $col = 0;
    foreach($row_data as $key=>$value) {
        $objPHPExcel->getActiveSheet()->setCellValueByColumnAndRow($col, $row, $value);
        $col++;
    }
    $row++;
}

How to change HTML Object element data attribute value in javascript

In JavaScript, you can assign values to data attributes through Element.dataset.

For example:

avatar.dataset.id = 12345;

Reference: https://developer.mozilla.org/en/docs/Web/API/HTMLElement/dataset

How to make a Generic Type Cast function

ConvertValue( System.Object o ), then you can branch out by o.GetType() result and up-cast o to the types to work with the value.

bind/unbind service example (android)

Add these methods to your Activity:

private MyService myServiceBinder;
public ServiceConnection myConnection = new ServiceConnection() {

    public void onServiceConnected(ComponentName className, IBinder binder) {
        myServiceBinder = ((MyService.MyBinder) binder).getService();
        Log.d("ServiceConnection","connected");
        showServiceData();
    }

    public void onServiceDisconnected(ComponentName className) {
        Log.d("ServiceConnection","disconnected");
        myService = null;
    }
};

public Handler myHandler = new Handler() {
    public void handleMessage(Message message) {
        Bundle data = message.getData();
    }
};

public void doBindService() {
    Intent intent = null;
    intent = new Intent(this, BTService.class);
    // Create a new Messenger for the communication back
    // From the Service to the Activity
    Messenger messenger = new Messenger(myHandler);
    intent.putExtra("MESSENGER", messenger);

    bindService(intent, myConnection, Context.BIND_AUTO_CREATE);
}

And you can bind to service by ovverriding onResume(), and onPause() at your Activity class.

@Override
protected void onResume() {

    Log.d("activity", "onResume");
    if (myService == null) {
        doBindService();
    }
    super.onResume();
}

@Override
protected void onPause() {
    //FIXME put back

    Log.d("activity", "onPause");
    if (myService != null) {
        unbindService(myConnection);
        myService = null;
    }
    super.onPause();
}

Note, that when binding to a service only the onCreate() method is called in the service class. In your Service class you need to define the myBinder method:

private final IBinder mBinder = new MyBinder();
private Messenger outMessenger;

@Override
public IBinder onBind(Intent arg0) {
    Bundle extras = arg0.getExtras();
    Log.d("service","onBind");
    // Get messager from the Activity
    if (extras != null) {
        Log.d("service","onBind with extra");
        outMessenger = (Messenger) extras.get("MESSENGER");
    }
    return mBinder;
}

public class MyBinder extends Binder {
    MyService getService() {
        return MyService.this;
    }
}

After you defined these methods you can reach the methods of your service at your Activity:

private void showServiceData() {  
    myServiceBinder.myMethod();
}

and finally you can start your service when some event occurs like _BOOT_COMPLETED_

public class MyReciever  extends BroadcastReceiver {
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (action.equals("android.intent.action.BOOT_COMPLETED")) {
            Intent service = new Intent(context, myService.class);
            context.startService(service);
        }
    }
}

note that when starting a service the onCreate() and onStartCommand() is called in service class and you can stop your service when another event occurs by stopService() note that your event listener should be registerd in your Android manifest file:

<receiver android:name="MyReciever" android:enabled="true" android:exported="true">
        <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED" />
        </intent-filter>
</receiver>

Adding a simple spacer to twitter bootstrap

In Bootstrap 4 you can use classes like mt-5, mb-5, my-5, mx-5 (y for both top and bottom, x for both left and right).

According to their site:

The classes are named using the format {property}{sides}-{size} for xs and {property}{sides}-{breakpoint}-{size} for sm, md, lg, and xl.

Link: https://getbootstrap.com/docs/4.0/utilities/spacing/

Why is this inline-block element pushed downward?

Using jquery to get element's position relative to viewport

I found that the answer by cballou was no longer working in Firefox as of Jan. 2014. Specifically, if (self.pageYOffset) didn't trigger if the client had scrolled right, but not down - because 0 is a falsey number. This went undetected for a while because Firefox supported document.body.scrollLeft/Top, but this is no longer working for me (on Firefox 26.0).

Here's my modified solution:

var getPageScroll = function(document_el, window_el) {
  var xScroll = 0, yScroll = 0;
  if (window_el.pageYOffset !== undefined) {
    yScroll = window_el.pageYOffset;
    xScroll = window_el.pageXOffset;
  } else if (document_el.documentElement !== undefined && document_el.documentElement.scrollTop) {
    yScroll = document_el.documentElement.scrollTop;
    xScroll = document_el.documentElement.scrollLeft;
  } else if (document_el.body !== undefined) {// all other Explorers
    yScroll = document_el.body.scrollTop;
    xScroll = document_el.body.scrollLeft;
  }
  return [xScroll,yScroll];
};

Tested and working in FF26, Chrome 31, IE11. Almost certainly works on older versions of all of them.

Import Excel to Datagridview

try this following snippet, its working fine.

private void button1_Click(object sender, EventArgs e)
{
     try
     {
             OpenFileDialog openfile1 = new OpenFileDialog();
             if (openfile1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
             {
                   this.textBox1.Text = openfile1.FileName;
             }
             {
                   string pathconn = "Provider = Microsoft.jet.OLEDB.4.0; Data source=" + textBox1.Text + ";Extended Properties=\"Excel 8.0;HDR= yes;\";";
                   OleDbConnection conn = new OleDbConnection(pathconn);
                   OleDbDataAdapter MyDataAdapter = new OleDbDataAdapter("Select * from [" + textBox2.Text + "$]", conn);
                   DataTable dt = new DataTable();
                   MyDataAdapter.Fill(dt);
                   dataGridView1.DataSource = dt;
             }
      }
      catch { }
}

How do I capture response of form.submit

You won't be able to do this easily with plain javascript. When you post a form, the form inputs are sent to the server and your page is refreshed - the data is handled on the server side. That is, the submit() function doesn't actually return anything, it just sends the form data to the server.

If you really wanted to get the response in Javascript (without the page refreshing), then you'll need to use AJAX, and when you start talking about using AJAX, you'll need to use a library. jQuery is by far the most popular, and my personal favourite. There's a great plugin for jQuery called Form which will do exactly what it sounds like you want.

Here's how you'd use jQuery and that plugin:

$('#myForm')
    .ajaxForm({
        url : 'myscript.php', // or whatever
        dataType : 'json',
        success : function (response) {
            alert("The server says: " + response);
        }
    })
;

How can I multiply and divide using only bit shifting and adding?

Try this. https://gist.github.com/swguru/5219592

import sys
# implement divide operation without using built-in divide operator
def divAndMod_slow(y,x, debug=0):
    r = 0
    while y >= x:
            r += 1
            y -= x
    return r,y 


# implement divide operation without using built-in divide operator
def divAndMod(y,x, debug=0):

    ## find the highest position of positive bit of the ratio
    pos = -1
    while y >= x:
            pos += 1
            x <<= 1
    x >>= 1
    if debug: print "y=%d, x=%d, pos=%d" % (y,x,pos)

    if pos == -1:
            return 0, y

    r = 0
    while pos >= 0:
            if y >= x:
                    r += (1 << pos)                        
                    y -= x                
            if debug: print "y=%d, x=%d, r=%d, pos=%d" % (y,x,r,pos)

            x >>= 1
            pos -= 1

    return r, y


if __name__ =="__main__":
    if len(sys.argv) == 3:
        y = int(sys.argv[1])
        x = int(sys.argv[2])
     else:
            y = 313271356
            x = 7

print "=== Slow Version ...."
res = divAndMod_slow( y, x)
print "%d = %d * %d + %d" % (y, x, res[0], res[1])

print "=== Fast Version ...."
res = divAndMod( y, x, debug=1)
print "%d = %d * %d + %d" % (y, x, res[0], res[1])

VirtualBox: mount.vboxsf: mounting failed with the error: No such device

In addition to @Mats answer, I'm adding some more info (it helped me on Debian 8).

My shared folder/clipboard stopped to work for some reason (probably due to a patch installation on my virtual machine).

sudo mount -t vboxsf Shared_Folder ~/SF/

Gave me following result:

VirtualBox: mount.vboxsf: mounting failed with the error: No such device

The solution for me was to stop vboxadd and do a setup after that:

cd /opt/VBoxGuestAdditions-*/init 
sudo ./vboxadd setup

At this point, if you still get the following error:

No such device. The Guest Additions installation may have failed. The error has been logged in /var/log/vboxadd-install.log

You need to install linux headers:

apt-get install linux-headers-$(uname -r)

then you can install Guest Additions:

sh /media/cdrom/VBoxLinuxAdditions.run --nox11

and restart your Linux by:

reboot

then you will be able to mount your shared folder!

mount -t vboxsf Shared_Folder ~/SF/

More informations (in French), check this page.

Find by key deep in a nested array

We use object-scan for our data processing. It's conceptually very simple, but allows for a lot of cool stuff. Here is how you would solve your specific question

_x000D_

// const objectScan = require('object-scan');

const find = (id, input) => objectScan(['**'], {
  abort: true,
  rtn: 'value',
  filterFn: ({ value }) => value.id === id
})(input);

const data = [{ title: 'some title', channel_id: '123we', options: [{ channel_id: 'abc', image: 'http://asdasd.com/all-inclusive-block-img.jpg', title: 'All-Inclusive', options: [{ channel_id: 'dsa2', title: 'Some Recommends', options: [{ image: 'http://www.asdasd.com', title: 'Sandals', id: '1', content: {} }] }] }] }];

console.log(find('1', data));
// => { image: 'http://www.asdasd.com', title: 'Sandals', id: '1', content: {} }

_x000D_

.as-console-wrapper {max-height: 100% !important; top: 0}

_x000D_

<script src="https://bundle.run/[email protected]"></script>

_x000D_

Disclaimer: I'm the author of object-scan

How to style input and submit button with CSS?

http://jsfiddle.net/vfUvZ/

Here's a starting point

CSS:

input[type=text] {
    padding:5px; 
    border:2px solid #ccc; 
    -webkit-border-radius: 5px;
    border-radius: 5px;
}

input[type=text]:focus {
    border-color:#333;
}

input[type=submit] {
    padding:5px 15px; 
    background:#ccc; 
    border:0 none;
    cursor:pointer;
    -webkit-border-radius: 5px;
    border-radius: 5px; 
}

Check if any ancestor has a class using jQuery

if ($elem.parents('.left').length) {

}

How do I include a Perl module that's in a different directory?

From perlfaq8:

How do I add the directory my program lives in to the module/library search path?

(contributed by brian d foy)

If you know the directory already, you can add it to @INC as you would for any other directory. You might use lib if you know the directory at compile time:

use lib $directory;

The trick in this task is to find the directory. Before your script does anything else (such as a chdir), you can get the current working directory with the Cwd module, which comes with Perl:

BEGIN {
    use Cwd;
    our $directory = cwd;
    }

use lib $directory;

You can do a similar thing with the value of $0, which holds the script name. That might hold a relative path, but rel2abs can turn it into an absolute path. Once you have the

BEGIN {
    use File::Spec::Functions qw(rel2abs);
    use File::Basename qw(dirname);

    my $path   = rel2abs( $0 );
    our $directory = dirname( $path );
    }

use lib $directory;

The FindBin module, which comes with Perl, might work. It finds the directory of the currently running script and puts it in $Bin, which you can then use to construct the right library path:

use FindBin qw($Bin);

IIS_IUSRS and IUSR permissions in IIS8

I would use specific user (and NOT Application user). Then I will enable impersonation in the application. Once you do that whatever account is set as the specific user, those credentials would used to access local resources on that server (Not for external resources).

Specific User setting is specifically meant for accessing local resources.

Python: print a generator expression?

Quick answer:

Doing list() around a generator expression is (almost) exactly equivalent to having [] brackets around it. So yeah, you can do

>>> list((x for x in string.letters if x in (y for y in "BigMan on campus")))

But you can just as well do

>>> [x for x in string.letters if x in (y for y in "BigMan on campus")]

Yes, that will turn the generator expression into a list comprehension. It's the same thing and calling list() on it. So the way to make a generator expression into a list is to put brackets around it.

Detailed explanation:

A generator expression is a "naked" for expression. Like so:

x*x for x in range(10)

Now, you can't stick that on a line by itself, you'll get a syntax error. But you can put parenthesis around it.

>>> (x*x for x in range(10))
<generator object <genexpr> at 0xb7485464>

This is sometimes called a generator comprehension, although I think the official name still is generator expression, there isn't really any difference, the parenthesis are only there to make the syntax valid. You do not need them if you are passing it in as the only parameter to a function for example:

>>> sorted(x*x for x in range(10))
[0, 1, 4, 9, 16, 25, 36, 49, 64, 81]

Basically all the other comprehensions available in Python 3 and Python 2.7 is just syntactic sugar around a generator expression. Set comprehensions:

>>> {x*x for x in range(10)}
{0, 1, 4, 81, 64, 9, 16, 49, 25, 36}

>>> set(x*x for x in range(10))
{0, 1, 4, 81, 64, 9, 16, 49, 25, 36}

Dict comprehensions:

>>> dict((x, x*x) for x in range(10))
{0: 0, 1: 1, 2: 4, 3: 9, 4: 16, 5: 25, 6: 36, 7: 49, 8: 64, 9: 81}

>>> {x: x*x for x in range(10)}
{0: 0, 1: 1, 2: 4, 3: 9, 4: 16, 5: 25, 6: 36, 7: 49, 8: 64, 9: 81}

And list comprehensions under Python 3:

>>> list(x*x for x in range(10))
[0, 1, 4, 9, 16, 25, 36, 49, 64, 81]

>>> [x*x for x in range(10)]
[0, 1, 4, 9, 16, 25, 36, 49, 64, 81]

Under Python 2, list comprehensions is not just syntactic sugar. But the only difference is that x will under Python 2 leak into the namespace.

>>> x
9

While under Python 3 you'll get

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

This means that the best way to get a nice printout of the content of your generator expression in Python is to make a list comprehension out of it! However, this will obviously not work if you already have a generator object. Doing that will just make a list of one generator:

>>> foo = (x*x for x in range(10))
>>> [foo]
[<generator object <genexpr> at 0xb7559504>]

In that case you will need to call list():

>>> list(foo)
[0, 1, 4, 9, 16, 25, 36, 49, 64, 81]

Although this works, but is kinda stupid:

>>> [x for x in foo]
[0, 1, 4, 9, 16, 25, 36, 49, 64, 81]

How to set time to a date object in java

Can you show code which you use for setting date object? Anyway< you can use this code for intialisation of date:

new SimpleDateFormat("yyyy-MM-dd hh:mm:ss").parse("2011-01-01 00:00:00")

oracle - what statements need to be committed?

DML (Data Manipulation Language) commands need to be commited/rolled back. Here is a list of those commands.

Data Manipulation Language (DML) statements are used for managing data within schema objects. Some examples:

INSERT - insert data into a table
UPDATE - updates existing data within a table
DELETE - deletes records from a table, the space for the records remain
MERGE - UPSERT operation (insert or update)
CALL - call a PL/SQL or Java subprogram
EXPLAIN PLAN - explain access path to data
LOCK TABLE - control concurrency

How to launch Safari and open URL from iOS app

openURL(:) was deprecated in iOS 10.0, instead you should use the following instance method on UIApplication: open(:options:completionHandler:)

Example using Swift
This will open "https://apple.com" in Safari.

if let url = URL(string: "https://apple.com") {
    if UIApplication.shared.canOpenURL(url) {
        UIApplication.shared.open(url, options: [:], completionHandler: nil)
    }
}

https://developer.apple.com/reference/uikit/uiapplication/1648685-open

jquery click event not firing?

Is this markup added to the DOM asynchronously? You will need to use live in that case:

NOTE: .live has been deprecated and removed in the latest versions of jQuery (for good reason). Please refer to the event delegation strategy below for usage and solution.

<script>
    $(document).ready(function(){
        $('.play_navigation a').live('click', function(){
            console.log("this is the click");
            return false;
        });
    });
</script>

The fact that you are able to re-run your script block and have it work tells me that for some reason the elements weren't available at the time of binding or the binding was removed at some point. If the elements weren't there at bind-time, you will need to use live (or event delegation, preferably). Otherwise, you need to check your code for something else that would be removing the binding.

Using jQuery 1.7 event delegation:

$(function () {

    $('.play_navigation').on('click', 'a', function (e) {
        console.log('this is the click');
        e.preventDefault();
    });

});

You can also delegate events up to the document if you feel that you would like to bind the event before the document is ready (note that this also causes jQuery to examine every click event to determine if the element matches the appropriate selector):

$(document).on('click', '.play_navigation a', function (e) {
    console.log('this is the click');
    e.preventDefault();
});

What is the fastest way to transpose a matrix in C++?

This is a good question. There are many reason you would want to actually transpose the matrix in memory rather than just swap coordinates, e.g. in matrix multiplication and Gaussian smearing.

First let me list one of the functions I use for the transpose (EDIT: please see the end of my answer where I found a much faster solution)

void transpose(float *src, float *dst, const int N, const int M) {
    #pragma omp parallel for
    for(int n = 0; n<N*M; n++) {
        int i = n/N;
        int j = n%N;
        dst[n] = src[M*j + i];
    }
}

Now let's see why the transpose is useful. Consider matrix multiplication C = A*B. We could do it this way.

for(int i=0; i<N; i++) {
    for(int j=0; j<K; j++) {
        float tmp = 0;
        for(int l=0; l<M; l++) {
            tmp += A[M*i+l]*B[K*l+j];
        }
        C[K*i + j] = tmp;
    }
}

That way, however, is going to have a lot of cache misses. A much faster solution is to take the transpose of B first

transpose(B);
for(int i=0; i<N; i++) {
    for(int j=0; j<K; j++) {
        float tmp = 0;
        for(int l=0; l<M; l++) {
            tmp += A[M*i+l]*B[K*j+l];
        }
        C[K*i + j] = tmp;
    }
}
transpose(B);

Matrix multiplication is O(n^3) and the transpose is O(n^2), so taking the transpose should have a negligible effect on the computation time (for large n). In matrix multiplication loop tiling is even more effective than taking the transpose but that's much more complicated.

I wish I knew a faster way to do the transpose (Edit: I found a faster solution, see the end of my answer). When Haswell/AVX2 comes out in a few weeks it will have a gather function. I don't know if that will be helpful in this case but I could image gathering a column and writing out a row. Maybe it will make the transpose unnecessary.

For Gaussian smearing what you do is smear horizontally and then smear vertically. But smearing vertically has the cache problem so what you do is

Smear image horizontally
transpose output 
Smear output horizontally
transpose output

Here is a paper by Intel explaining that http://software.intel.com/en-us/articles/iir-gaussian-blur-filter-implementation-using-intel-advanced-vector-extensions

Lastly, what I actually do in matrix multiplication (and in Gaussian smearing) is not take exactly the transpose but take the transpose in widths of a certain vector size (e.g. 4 or 8 for SSE/AVX). Here is the function I use

void reorder_matrix(const float* A, float* B, const int N, const int M, const int vec_size) {
    #pragma omp parallel for
    for(int n=0; n<M*N; n++) {
        int k = vec_size*(n/N/vec_size);
        int i = (n/vec_size)%N;
        int j = n%vec_size;
        B[n] = A[M*i + k + j];
    }
}

EDIT:

I tried several function to find the fastest transpose for large matrices. In the end the fastest result is to use loop blocking with block_size=16 (Edit: I found a faster solution using SSE and loop blocking - see below). This code works for any NxM matrix (i.e. the matrix does not have to be square).

inline void transpose_scalar_block(float *A, float *B, const int lda, const int ldb, const int block_size) {
    #pragma omp parallel for
    for(int i=0; i<block_size; i++) {
        for(int j=0; j<block_size; j++) {
            B[j*ldb + i] = A[i*lda +j];
        }
    }
}

inline void transpose_block(float *A, float *B, const int n, const int m, const int lda, const int ldb, const int block_size) {
    #pragma omp parallel for
    for(int i=0; i<n; i+=block_size) {
        for(int j=0; j<m; j+=block_size) {
            transpose_scalar_block(&A[i*lda +j], &B[j*ldb + i], lda, ldb, block_size);
        }
    }
}

The values lda and ldb are the width of the matrix. These need to be multiples of the block size. To find the values and allocate the memory for e.g. a 3000x1001 matrix I do something like this

#define ROUND_UP(x, s) (((x)+((s)-1)) & -(s))
const int n = 3000;
const int m = 1001;
int lda = ROUND_UP(m, 16);
int ldb = ROUND_UP(n, 16);

float *A = (float*)_mm_malloc(sizeof(float)*lda*ldb, 64);
float *B = (float*)_mm_malloc(sizeof(float)*lda*ldb, 64);

For 3000x1001 this returns ldb = 3008 and lda = 1008

Edit:

I found an even faster solution using SSE intrinsics:

inline void transpose4x4_SSE(float *A, float *B, const int lda, const int ldb) {
    __m128 row1 = _mm_load_ps(&A[0*lda]);
    __m128 row2 = _mm_load_ps(&A[1*lda]);
    __m128 row3 = _mm_load_ps(&A[2*lda]);
    __m128 row4 = _mm_load_ps(&A[3*lda]);
     _MM_TRANSPOSE4_PS(row1, row2, row3, row4);
     _mm_store_ps(&B[0*ldb], row1);
     _mm_store_ps(&B[1*ldb], row2);
     _mm_store_ps(&B[2*ldb], row3);
     _mm_store_ps(&B[3*ldb], row4);
}

inline void transpose_block_SSE4x4(float *A, float *B, const int n, const int m, const int lda, const int ldb ,const int block_size) {
    #pragma omp parallel for
    for(int i=0; i<n; i+=block_size) {
        for(int j=0; j<m; j+=block_size) {
            int max_i2 = i+block_size < n ? i + block_size : n;
            int max_j2 = j+block_size < m ? j + block_size : m;
            for(int i2=i; i2<max_i2; i2+=4) {
                for(int j2=j; j2<max_j2; j2+=4) {
                    transpose4x4_SSE(&A[i2*lda +j2], &B[j2*ldb + i2], lda, ldb);
                }
            }
        }
    }
}

Set div height to fit to the browser using CSS

You have to declare height of html to div1 elements together, like:

html,
body,
.container,
.div1,
.div2 {
    height:100%;
}

Demo: http://jsfiddle.net/Ccham/

Notepad++ Regular expression find and delete a line

Step 1

Search → Find → (goto Tab) Mark
Find what: ^Session.*$
Enable the checkbox Bookmark line
Enable the checkbox Regular expression (under Search Mode)
Click Mark All (this will find the regex and highlights all the lines and bookmark them)

Step 2

Search → Bookmark → Remove Bookmarked Lines

Best way to make WPF ListView/GridView sort on column-header clicking?

I wrote a set of attached properties to automatically sort a GridView, you can check it out here. It doesn't handle the up/down arrow, but it could easily be added.

<ListView ItemsSource="{Binding Persons}"
          IsSynchronizedWithCurrentItem="True"
          util:GridViewSort.AutoSort="True">
    <ListView.View>
        <GridView>
            <GridView.Columns>
                <GridViewColumn Header="Name"
                                DisplayMemberBinding="{Binding Name}"
                                util:GridViewSort.PropertyName="Name"/>
                <GridViewColumn Header="First name"
                                DisplayMemberBinding="{Binding FirstName}"
                                util:GridViewSort.PropertyName="FirstName"/>
                <GridViewColumn Header="Date of birth"
                                DisplayMemberBinding="{Binding DateOfBirth}"
                                util:GridViewSort.PropertyName="DateOfBirth"/>
            </GridView.Columns>
        </GridView>
    </ListView.View>
</ListView>

How to get a cross-origin resource sharing (CORS) post request working

This is a summary of what worked for me:

Define a new function (wrapped $.ajax to simplify):

jQuery.postCORS = function(url, data, func) {
  if(func == undefined) func = function(){};
  return $.ajax({
    type: 'POST', 
    url: url, 
    data: data, 
    dataType: 'json', 
    contentType: 'application/x-www-form-urlencoded', 
    xhrFields: { withCredentials: true }, 
    success: function(res) { func(res) }, 
    error: function() { 
            func({}) 
    }
  });
}

Usage:

$.postCORS("https://example.com/service.json",{ x : 1 },function(obj){
      if(obj.ok) {
           ...
      }
});

Also works with .done,.fail,etc:

$.postCORS("https://example.com/service.json",{ x : 1 }).done(function(obj){
      if(obj.ok) {
           ...
      }
}).fail(function(){
    alert("Error!");
});

Server side (in this case where example.com is hosted), set these headers (added some sample code in PHP):

header('Access-Control-Allow-Origin: https://not-example.com');
header('Access-Control-Allow-Credentials: true');
header('Access-Control-Max-Age: 604800');
header("Content-type: application/json");
$array = array("ok" => $_POST["x"]);
echo json_encode($array);

This is the only way I know to truly POST cross-domain from JS.

JSONP converts the POST into GET which may display sensitive information at server logs.

View JSON file in Browser

For Safari 12 and later, you can try the JSONBeautifier bookmarklet. Also works with other browsers.

I created this because JSON Formatter for Safari stopped working in Safari 12. There are a few new options for Safari 12, but I didn't find an open source one in the App Store, and I do not trust closed source browser extensions.

This can be used as a bookmarklet or the source, json-beautifier.js, can be copied and pasted into the browser console. The code is freely available for review and is less than 100 lines of code including comments. Runs entirely on your device and never sends your data over a network.

Works with local files too.

Differences between CHMOD 755 vs 750 permissions set

0755 = User:rwx Group:r-x World:r-x

0750 = User:rwx Group:r-x World:--- (i.e. World: no access)

r = read
w = write
x = execute (traverse for directories)

Align labels in form next to input

Answered a question such as this before, you can take a look at the results here:

Creating form to have fields and text next to each other - what is the semantic way to do it?

So to apply the same rules to your fiddle you can use display:inline-block to display your label and input groups side by side, like so:

CSS

input {
    margin-top: 5px;
    margin-bottom: 5px;
    display:inline-block;
    *display: inline;     /* for IE7*/
    zoom:1;              /* for IE7*/
    vertical-align:middle;
    margin-left:20px
}

label {
    display:inline-block;
    *display: inline;     /* for IE7*/
    zoom:1;              /* for IE7*/
    float: left;
    padding-top: 5px;
    text-align: right;
    width: 140px;
}

updated fiddle

Parallel.ForEach vs Task.Factory.StartNew

The first is a much better option.

Parallel.ForEach, internally, uses a Partitioner<T> to distribute your collection into work items. It will not do one task per item, but rather batch this to lower the overhead involved.

The second option will schedule a single Task per item in your collection. While the results will be (nearly) the same, this will introduce far more overhead than necessary, especially for large collections, and cause the overall runtimes to be slower.

FYI - The Partitioner used can be controlled by using the appropriate overloads to Parallel.ForEach, if so desired. For details, see Custom Partitioners on MSDN.

The main difference, at runtime, is the second will act asynchronous. This can be duplicated using Parallel.ForEach by doing:

Task.Factory.StartNew( () => Parallel.ForEach<Item>(items, item => DoSomething(item)));

By doing this, you still take advantage of the partitioners, but don't block until the operation is complete.

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