How to use sbt from behind proxy?

SBT use both HTTP/HTTPS/SFTP/SSH and other kind of connections to a repository. so when behind a proxy, these protocols should be available.

In most simple cases on Windows, you just need to pass proxy parameters options to JVM, like:

java -Dhttp.proxyHost=myproxy -Dhttp.proxyPort=8080

That will do.

But if not, there are few things you should be aware of:

whether if you are making a HTTPS connection to the repository.
whether sever certificates been imported to jre cacerts
whether your proxy would replace your server certificates

to solve first, you should pass https proxy parameter to jvm, like:

java -Dhttps.proxyHost=myproxy -Dhttps.proxyPort=8080 -Djavax.net.ssl.trustStore=${TRUST_STORE_PATH}

to solve the second, you should import the ca. there are a lot of tips.

to solve the third, you maybe could considering using a authentication proxy.

to Simplify the config of SBT, it provide sbtconfig.txt and sbtops in the conf directory, look into it.

Reference:
http://www.scala-sbt.org/0.13/docs/Setup-Notes.html
http://www.scala-sbt.org/1.0/docs/Publishing.html

How to check sbt version?

sbt about then enter to get SBT version

It seems like you installed a zip version of sbt, which is fine. But I suggest you install the native debian package if you are on Ubuntu. That is how I managed to install it on my Ubuntu 12.04. Check it out here: http://www.scala-sbt.org/release/docs/Installing-sbt-on-Linux.html Or simply directly download it from here.

ScalaTest in sbt: is there a way to run a single test without tags?

Just to simplify the example of Tyler.

test:-prefix is not needed.

So according to his example:

In the sbt-console:

testOnly *LoginServiceSpec

And in the terminal:

sbt "testOnly *LoginServiceSpec"

HTML5 File API read as text and binary

Note in 2018: readAsBinaryString is outdated. For use cases where previously you'd have used it, these days you'd use readAsArrayBuffer (or in some cases, readAsDataURL) instead.

readAsBinaryString says that the data must be represented as a binary string, where:

...every byte is represented by an integer in the range [0..255].

JavaScript originally didn't have a "binary" type (until ECMAScript 5's WebGL support of Typed Array* (details below) -- it has been superseded by ECMAScript 2015's ArrayBuffer) and so they went with a String with the guarantee that no character stored in the String would be outside the range 0..255. (They could have gone with an array of Numbers instead, but they didn't; perhaps large Strings are more memory-efficient than large arrays of Numbers, since Numbers are floating-point.)

If you're reading a file that's mostly text in a western script (mostly English, for instance), then that string is going to look a lot like text. If you read a file with Unicode characters in it, you should notice a difference, since JavaScript strings are UTF-16** (details below) and so some characters will have values above 255, whereas a "binary string" according to the File API spec wouldn't have any values above 255 (you'd have two individual "characters" for the two bytes of the Unicode code point).

If you're reading a file that's not text at all (an image, perhaps), you'll probably still get a very similar result between readAsText and readAsBinaryString, but with readAsBinaryString you know that there won't be any attempt to interpret multi-byte sequences as characters. You don't know that if you use readAsText, because readAsText will use an encoding determination to try to figure out what the file's encoding is and then map it to JavaScript's UTF-16 strings.

You can see the effect if you create a file and store it in something other than ASCII or UTF-8. (In Windows you can do this via Notepad; the "Save As" as an encoding drop-down with "Unicode" on it, by which looking at the data they seem to mean UTF-16; I'm sure Mac OS and *nix editors have a similar feature.) Here's a page that dumps the result of reading a file both ways:

<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-type" content="text/html;charset=UTF-8">
<title>Show File Data</title>
<style type='text/css'>
body {
    font-family: sans-serif;
}
</style>
<script type='text/javascript'>

    function loadFile() {
        var input, file, fr;

        if (typeof window.FileReader !== 'function') {
            bodyAppend("p", "The file API isn't supported on this browser yet.");
            return;
        }

        input = document.getElementById('fileinput');
        if (!input) {
            bodyAppend("p", "Um, couldn't find the fileinput element.");
        }
        else if (!input.files) {
            bodyAppend("p", "This browser doesn't seem to support the `files` property of file inputs.");
        }
        else if (!input.files[0]) {
            bodyAppend("p", "Please select a file before clicking 'Load'");
        }
        else {
            file = input.files[0];
            fr = new FileReader();
            fr.onload = receivedText;
            fr.readAsText(file);
        }

        function receivedText() {
            showResult(fr, "Text");

            fr = new FileReader();
            fr.onload = receivedBinary;
            fr.readAsBinaryString(file);
        }

        function receivedBinary() {
            showResult(fr, "Binary");
        }
    }

    function showResult(fr, label) {
        var markup, result, n, aByte, byteStr;

        markup = [];
        result = fr.result;
        for (n = 0; n < result.length; ++n) {
            aByte = result.charCodeAt(n);
            byteStr = aByte.toString(16);
            if (byteStr.length < 2) {
                byteStr = "0" + byteStr;
            }
            markup.push(byteStr);
        }
        bodyAppend("p", label + " (" + result.length + "):");
        bodyAppend("pre", markup.join(" "));
    }

    function bodyAppend(tagName, innerHTML) {
        var elm;

        elm = document.createElement(tagName);
        elm.innerHTML = innerHTML;
        document.body.appendChild(elm);
    }

</script>
</head>
<body>
<form action='#' onsubmit="return false;">
<input type='file' id='fileinput'>
<input type='button' id='btnLoad' value='Load' onclick='loadFile();'>
</form>
</body>
</html>

If I use that with a "Testing 1 2 3" file stored in UTF-16, here are the results I get:

Text (13):

54 65 73 74 69 6e 67 20 31 20 32 20 33

Binary (28):

ff fe 54 00 65 00 73 00 74 00 69 00 6e 00 67 00 20 00 31 00 20 00 32 00 20 00 33 00

As you can see, readAsText interpreted the characters and so I got 13 (the length of "Testing 1 2 3"), and readAsBinaryString didn't, and so I got 28 (the two-byte BOM plus two bytes for each character).

* XMLHttpRequest.response with responseType = "arraybuffer" is supported in HTML 5.

** "JavaScript strings are UTF-16" may seem like an odd statement; aren't they just Unicode? No, a JavaScript string is a series of UTF-16 code units; you see surrogate pairs as two individual JavaScript "characters" even though, in fact, the surrogate pair as a whole is just one character. See the link for details.

Setting state on componentDidMount()

It is not an anti-pattern to call setState in componentDidMount. In fact, ReactJS provides an example of this in their documentation:

You should populate data with AJAX calls in the componentDidMount lifecycle method. This is so you can use setState to update your component when the data is retrieved.

Example From Doc

componentDidMount() {
    fetch("https://api.example.com/items")
      .then(res => res.json())
      .then(
        (result) => {
          this.setState({
            isLoaded: true,
            items: result.items
          });
        },
        // Note: it's important to handle errors here
        // instead of a catch() block so that we don't swallow
        // exceptions from actual bugs in components.
        (error) => {
          this.setState({
            isLoaded: true,
            error
          });
        }
      )
  }

unary operator expected in shell script when comparing null value with string

Since the value of $var is the empty string, this:

if [ $var == $var1 ]; then

expands to this:

if [ == abcd ]; then

which is a syntax error.

You need to quote the arguments:

if [ "$var" == "$var1" ]; then

You can also use = rather than ==; that's the original syntax, and it's a bit more portable.

If you're using bash, you can use the [[ syntax, which doesn't require the quotes:

if [[ $var = $var1 ]]; then

Even then, it doesn't hurt to quote the variable reference, and adding quotes:

if [[ "$var" = "$var1" ]]; then

might save a future reader a moment trying to remember whether [[ ... ]] requires them.

Deny all, allow only one IP through htaccess

Just in addition to @David Brown´s answer, if you want to block an IP, you must first allow all then block the IPs as such:

    <RequireAll>
      Require all granted
      Require not ip 10.0.0.0/255.0.0.0
      Require not ip 172.16.0.0/12
      Require not ip 192.168
    </RequireAll>

First line allows all
Second line blocks from 10.0.0.0 to 10.255.255.255
Third line blocks from 172.16.0.0 to 172.31.255.255
Fourth line blocks from 192.168.0.0 to 192.168.255.255

You may use any of the notations mentioned above to suit you CIDR needs.

Fragment onCreateView and onActivityCreated called twice

Ok, Here's what I found out.

What I didn't understand is that all fragments that are attached to an activity when a config change happens (phone rotates) are recreated and added back to the activity. (which makes sense)

What was happening in the TabListener constructor was the tab was detached if it was found and attached to the activity. See below:

mFragment = mActivity.getFragmentManager().findFragmentByTag(mTag);
    if (mFragment != null && !mFragment.isDetached()) {
        Log.d(TAG, "constructor: detaching fragment " + mTag);
        FragmentTransaction ft = mActivity.getFragmentManager().beginTransaction();
        ft.detach(mFragment);
        ft.commit();
    }

Later in the activity onCreate the previously selected tab was selected from the saved instance state. See below:

if (savedInstanceState != null) {
    bar.setSelectedNavigationItem(savedInstanceState.getInt("tab", 0));
    Log.d(TAG, "FragmentTabs.onCreate tab: " + savedInstanceState.getInt("tab"));
    Log.d(TAG, "FragmentTabs.onCreate number: " + savedInstanceState.getInt("number"));
}

When the tab was selected it would be reattached in the onTabSelected callback.

public void onTabSelected(Tab tab, FragmentTransaction ft) {
    if (mFragment == null) {
        mFragment = Fragment.instantiate(mActivity, mClass.getName(), mArgs);
        Log.d(TAG, "onTabSelected adding fragment " + mTag);
        ft.add(android.R.id.content, mFragment, mTag);
    } else {
        Log.d(TAG, "onTabSelected attaching fragment " + mTag);
        ft.attach(mFragment);
    }
}

The fragment being attached is the second call to the onCreateView and onActivityCreated methods. (The first being when the system is recreating the acitivity and all attached fragments) The first time the onSavedInstanceState Bundle would have saved data but not the second time.

The solution is to not detach the fragment in the TabListener constructor, just leave it attached. (You still need to find it in the FragmentManager by it's tag) Also, in the onTabSelected method I check to see if the fragment is detached before I attach it. Something like this:

public void onTabSelected(Tab tab, FragmentTransaction ft) {
            if (mFragment == null) {
                mFragment = Fragment.instantiate(mActivity, mClass.getName(), mArgs);
                Log.d(TAG, "onTabSelected adding fragment " + mTag);
                ft.add(android.R.id.content, mFragment, mTag);
            } else {

                if(mFragment.isDetached()) {
                    Log.d(TAG, "onTabSelected attaching fragment " + mTag);
                    ft.attach(mFragment);
                } else {
                    Log.d(TAG, "onTabSelected fragment already attached " + mTag);
                }
            }
        }

Clearing content of text file using php

 $fp = fopen("$address",'w+');
 if(!$fp)
    echo 'not Open';
        //-----------------------------------
 while(!feof($fp))
     {
        fputs($fp,' ',999);                    
     } 

 fclose($fp);

How to create a file in Ruby

data = 'data you want inside the file'.

You can use File.write('name of file here', data)

Getting "type or namespace name could not be found" but everything seems ok?

In my case I had a Class that was listed in the proper source folder, but was not registering in Solution Explorer. I had to do right click the project > Add Existing item and manually select that Class it said it was missing. Then everything worked fine!

How to change icon on Google map marker

var marker = new google.maps.Marker({
                position: new google.maps.LatLng(23.016427,72.571156),
                map: map,
                icon: 'images/map_marker_icon.png',
                title: 'Hi..!'
            });

apply local path on icon only

Send mail via Gmail with PowerShell V2's Send-MailMessage

I am really new to PowerShell, and I was searching about gmailing from PowerShell. I took what you folks did in previous answers, and modified it a bit and have come up with a script which will check for attachments before adding them, and also to take an array of recipients.

## Send-Gmail.ps1 - Send a gmail message
## By Rodney Fisk - [email protected]
## 2 / 13 / 2011

# Get command line arguments to fill in the fields
# Must be the first statement in the script
param(
    [Parameter(Mandatory = $true,
               Position = 0,
               ValueFromPipelineByPropertyName = $true)]
    [Alias('From')] # This is the name of the parameter e.g. -From [email protected]
    [String]$EmailFrom, # This is the value [Don't forget the comma at the end!]

    [Parameter(Mandatory = $true,
               Position = 1,
               ValueFromPipelineByPropertyName = $true)]
    [Alias('To')]
    [String[]]$Arry_EmailTo,

    [Parameter(Mandatory = $true,
               Position = 2,
               ValueFromPipelineByPropertyName = $true)]
    [Alias('Subj')]
    [String]$EmailSubj,

    [Parameter(Mandatory = $true,
               Position = 3,
               ValueFromPipelineByPropertyName = $true)]
    [Alias('Body')]
    [String]$EmailBody,

    [Parameter(Mandatory = $false,
               Position = 4,
               ValueFromPipelineByPropertyName = $true)]
    [Alias('Attachment')]
    [String[]]$Arry_EmailAttachments
)

# From Christian @ stackoverflow.com
$SMTPServer = "smtp.gmail.com"
$SMTPClient = New-Object Net.Mail.SMTPClient($SmtpServer, 587)
$SMTPClient.EnableSSL = $true
$SMTPClient.Credentials = New-Object System.Net.NetworkCredential("GMAIL_USERNAME", "GMAIL_PASSWORD");

# From Core @ stackoverflow.com
$emailMessage = New-Object System.Net.Mail.MailMessage
$emailMessage.From = $EmailFrom
foreach ($recipient in $Arry_EmailTo)
{
    $emailMessage.To.Add($recipient)
}
$emailMessage.Subject = $EmailSubj
$emailMessage.Body = $EmailBody
# Do we have any attachments?
# If yes, then add them, if not, do nothing
if ($Arry_EmailAttachments.Count -ne $NULL)
{
    $emailMessage.Attachments.Add()
}
$SMTPClient.Send($emailMessage)

Of course, change the GMAIL_USERNAME and GMAIL_PASSWORD values to your particular user and password.

Installing TensorFlow on Windows (Python 3.6.x)

Tensor flow on 32 bit machine.

There is no official build out for 32 bit, but still there is a workaround for that, follow the link http://cudamusing.blogspot.in/2015/11/building-tensorflow-for-jetson-tk1.html. I would not suggest doing this big reason is its not possible to follow the process every time there is a change in official tensor flow code.

Fixing a systemd service 203/EXEC failure (no such file or directory)

I actually used the answer from How do I run a node.js app as a background service? combined with what dwrz said above. In my case, I was creating a Discord bot that needed to be able to run when I was not around.

With this service in place, I initially got the same error that the initial poster did, which brought me here. I was missing the #!/usr/bin/env node at the top of my executed node.js script.

Since then, no problems, although I intend to see what else can be extended to the service itself.

PDO closing connection

<?php if(!class_exists('PDO2')) {
    class PDO2 {
        private static $_instance;
        public static function getInstance() {
            if (!isset(self::$_instance)) {
                try {
                    self::$_instance = new PDO(
                        'mysql:host=***;dbname=***',
                        '***',
                        '***',
                        array(
                            PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8mb4 COLLATE utf8mb4_general_ci",
                            PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION
                        )
                    );
                } catch (PDOException $e) {
                    throw new PDOException($e->getMessage(), (int) $e->getCode());
                }
            }
            return self::$_instance;
        }
        public static function closeInstance() {
            return self::$_instance = null;
        }
    }
}
$req = PDO2::getInstance()->prepare('SELECT * FROM table');
$req->execute();
$count = $req->rowCount();
$results = $req->fetchAll(PDO::FETCH_ASSOC);
$req->closeCursor();
// Do other requests maybe
// And close connection
PDO2::closeInstance();
// print output

Full example, with custom class PDO2.

Send email using the GMail SMTP server from a PHP page

Your code does not appear to be using TLS (SSL), which is necessary to deliver mail to Google (and using ports 465 or 587).

You can do this by setting

$host = "ssl://smtp.gmail.com";

Your code looks suspiciously like this example which refers to ssl:// in the hostname scheme.

Is it possible to modify a string of char in C?

The memory for a & b is not allocated by you. The compiler is free to choose a read-only memory location to store the characters. So if you try to change it may result in seg fault. So I suggest you to create a character array yourself. Something like: char a[10]; strcpy(a, "Hello");

How do I display a decimal value to 2 decimal places?

decimalVar.ToString("F");

This will:

Round off to 2 decimal places eg. 23.456 ? 23.46
Ensure that there are always 2 decimal places eg. 23 ? 23.00; 12.5 ? 12.50

Ideal for displaying currency.

Check out the documentation on ToString("F") (thanks to Jon Schneider).

How to make a drop down list in yii2?

Html::activeDropDownList($model, 'id', ArrayHelper::map(AttendanceLabel::find()->all(), 'id', 'label_name'), ['prompt'=>'Attendance Status'] );

can you host a private repository for your organization to use with npm?

You can also use Aragon Package Manager if you prefer a decentralized approach:

Using APM: http://blog.aragon.one/using-apm-to-replace-npm-and-other-centralized-package-managers/
Deploying APM: https://github.com/aragon/aragonOS#apm

VBA Runtime Error 1004 "Application-defined or Object-defined error" when Selecting Range

I also had a similar issue. After copying and pasting to a sheet I wanted the cursor/ selected cell to be A1 not the range that I just pasted into.

Dim wkSheet as Worksheet
Set wkSheet = Worksheets(<sheetname>)

wkSheet("A1").Select

but got a 400 error which was actually a 1004 error

You need to activate the sheet before changing the selected cell this worked

Dim wkSheet as Worksheet
Set wkSheet = Worksheets(<sheetname>)

wkSheet.Activate
wkSheet("A1").Select

Put byte array to JSON and vice versa

The typical way to send binary in json is to base64 encode it.

Java provides different ways to Base64 encode and decode a byte[]. One of these is DatatypeConverter.

Very simply

byte[] originalBytes = new byte[] { 1, 2, 3, 4, 5};
String base64Encoded = DatatypeConverter.printBase64Binary(originalBytes);
byte[] base64Decoded = DatatypeConverter.parseBase64Binary(base64Encoded);

You'll have to make this conversion depending on the json parser/generator library you use.

How to get row count in sqlite using Android?

Change your getTaskCount Method to this:

public int getTaskCount(long tasklist_id){
    SQLiteDatabase db = this.getWritableDatabase();
    Cursor cursor= db.rawQuery("SELECT COUNT (*) FROM " + TABLE_TODOTASK + " WHERE " + KEY_TASK_TASKLISTID + "=?", new String[] { String.valueOf(tasklist_id) });
    cursor.moveToFirst();
    int count= cursor.getInt(0);
    cursor.close();
    return count;
}

Then, update the click handler accordingly:

public void onItemClick(AdapterView<?> arg0, android.view.View v, int position, long id) {
    db = new TodoTask_Database(getApplicationContext());

    // Get task list id
    int tasklistid = adapter.getItem(position).getTaskListId();

    if(db.getTaskCount(tasklistid) > 0) {    
        System.out.println(c);
        Intent taskListID = new Intent(getApplicationContext(), AddTask_List.class);
        taskListID.putExtra("TaskList_ID", tasklistid);
        startActivity(taskListID);
    } else {
        Intent addTask = new Intent(getApplicationContext(), Add_Task.class);
        startActivity(addTask);
    }
}

How do I convert an ANSI encoded file to UTF-8 with Notepad++?

Maybe this is not the answer you needed, but I encountered similar problem, so I decided to put it here.

I needed to convert 500 xml files to UTF8 via Notepad++. Why Notepad++? When I used the option "Encode in UTF8" (many other converters use the same logic) it messed up all special characters, so I had to use "Convert to UTF8" explicitly.

Here some simple steps to convert multiple files via Notepad++ without messing up with special characters (for ex. diacritical marks).

Run Notepad++ and then open menu Plugins->Plugin Manager->Show Plugin Manager
Install Python Script. When plugin is installed, restart the application.
Choose menu Plugins->Python Script->New script.
Choose its name, and then past the following code:

convertToUTF8.py

import os
import sys
from Npp import notepad # import it first!

filePathSrc="C:\\Users\\" # Path to the folder with files to convert
for root, dirs, files in os.walk(filePathSrc):
    for fn in files: 
        if fn[-4:] == '.xml': # Specify type of the files
            notepad.open(root + "\\" + fn)      
            notepad.runMenuCommand("Encoding", "Convert to UTF-8")
            # notepad.save()
            # if you try to save/replace the file, an annoying confirmation window would popup.
            notepad.saveAs("{}{}".format(fn[:-4], '_utf8.xml')) 
            notepad.close()

After all, run the script

Using a PagedList with a ViewModel ASP.Net MVC

For anyone who is trying to do it without modifying your ViewModels AND not loading all your records from the database.

Repository

    public List<Order> GetOrderPage(int page, int itemsPerPage, out int totalCount)
    {
        List<Order> orders = new List<Order>();
        using (DatabaseContext db = new DatabaseContext())
        {
            orders = (from o in db.Orders
                      orderby o.Date descending //use orderby, otherwise Skip will throw an error
                      select o)
                      .Skip(itemsPerPage * page).Take(itemsPerPage)
                      .ToList();
            totalCount = db.Orders.Count();//return the number of pages
        }
        return orders;//the query is now already executed, it is a subset of all the orders.
    }

Controller

    public ActionResult Index(int? page)
    {
        int pagenumber = (page ?? 1) -1; //I know what you're thinking, don't put it on 0 :)
        OrderManagement orderMan = new OrderManagement(HttpContext.ApplicationInstance.Context);
        int totalCount = 0;
        List<Order> orders = orderMan.GetOrderPage(pagenumber, 5, out totalCount);
        List<OrderViewModel> orderViews = new List<OrderViewModel>();
        foreach(Order order in orders)//convert your models to some view models.
        {
            orderViews.Add(orderMan.GenerateOrderViewModel(order));
        }
        //create staticPageList, defining your viewModel, current page, page size and total number of pages.
        IPagedList<OrderViewModel> pageOrders = new StaticPagedList<OrderViewModel>(orderViews, pagenumber + 1, 5, totalCount);
        return View(pageOrders);
    }

View

@using PagedList.Mvc;
@using PagedList; 

@model IPagedList<Babywatcher.Core.Models.OrderViewModel>

@{
    ViewBag.Title = "Index";
}

<h2>Index</h2>
<div class="container-fluid">
    <p>
        @Html.ActionLink("Create New", "Create")
    </p>
    @if (Model.Count > 0)
    {


        <table class="table">
          <tr>
            <th>
                @Html.DisplayNameFor(model => model.First().orderId)
            </th>
            <!--rest of your stuff-->
        </table>

    }
    else
    {
        <p>No Orders yet.</p>
    }
    @Html.PagedListPager(Model, page => Url.Action("Index", new { page }))
</div>

Bonus

Do above first, then perhaps use this!

Since this question is about (view) models, I'm going to give away a little solution for you that will not only be useful for paging, but for the rest of your application if you want to keep your entities separate, only used in the repository, and have the rest of the application deal with models (which can be used as view models).

Repository

In your order repository (in my case), add a static method to convert a model:

public static OrderModel ConvertToModel(Order entity)
{
    if (entity == null) return null;
    OrderModel model = new OrderModel
    {
        ContactId = entity.contactId,
        OrderId = entity.orderId,
    }
    return model;
}

Below your repository class, add this:

public static partial class Ex
{
    public static IEnumerable<OrderModel> SelectOrderModel(this IEnumerable<Order> source)
    {
        bool includeRelations = source.GetType() != typeof(DbQuery<Order>);
        return source.Select(x => new OrderModel
        {
            OrderId = x.orderId,
            //example use ConvertToModel of some other repository
            BillingAddress = includeRelations ? AddressRepository.ConvertToModel(x.BillingAddress) : null,
            //example use another extension of some other repository
            Shipments = includeRelations && x.Shipments != null ? x.Shipments.SelectShipmentModel() : null
        });
    }
}

And then in your GetOrderPage method:

    public IEnumerable<OrderModel> GetOrderPage(int page, int itemsPerPage, string searchString, string sortOrder, int? partnerId,
        out int totalCount)
    {
        IQueryable<Order> query = DbContext.Orders; //get queryable from db
        .....//do your filtering, sorting, paging (do not use .ToList() yet)

        return queryOrders.SelectOrderModel().AsEnumerable();
        //or, if you want to include relations
        return queryOrders.Include(x => x.BillingAddress).ToList().SelectOrderModel();
        //notice difference, first ToList(), then SelectOrderModel().
    }

Let me explain:

The static ConvertToModel method can be accessed by any other repository, as used above, I use ConvertToModel from some AddressRepository.

The extension class/method lets you convert an entity to a model. This can be IQueryable or any other list, collection.

Now here comes the magic: If you have executed the query BEFORE calling SelectOrderModel() extension, includeRelations inside the extension will be true because the source is NOT a database query type (not an linq-to-sql IQueryable). When this is true, the extension can call other methods/extensions throughout your application for converting models.

Now on the other side: You can first execute the extension and then continue doing LINQ filtering. The filtering will happen in the database eventually, because you did not do a .ToList() yet, the extension is just an layer of dealing with your queries. Linq-to-sql will eventually know what filtering to apply in the Database. The inlcudeRelations will be false so that it doesn't call other c# methods that SQL doesn't understand.

It looks complicated at first, extensions might be something new, but it's really useful. Eventually when you have set this up for all repositories, simply an .Include() extra will load the relations.

Adding attributes to an XML node

The latest and supposedly greatest way to construct the XML is by using LINQ to XML:

using System.Xml.Linq

       var xmlNode =
            new XElement("Login",
                         new XElement("id",
                             new XAttribute("userName", "Tushar"),
                             new XAttribute("password", "Tushar"),
                             new XElement("Name", "Tushar"),
                             new XElement("Age", "24")
                         )
            );
       xmlNode.Save("Tushar.xml");

Supposedly this way of coding should be easier, as the code closely resembles the output (which Jon's example above does not). However, I found that while coding this relatively easy example I was prone to lose my way between the cartload of comma's that you have to navigate among. Visual studio's auto spacing of code does not help either.

What is $@ in Bash?

Yes. Please see the man page of bash ( the first thing you go to ) under Special Parameters

Special Parameters

The shell treats several parameters specially. These parameters may only be referenced; assignment to them is not allowed.

* Expands to the positional parameters, starting from one. When the expansion occurs within double quotes, it expands to a single word with the value of each parameter separated by the first character of the IFS special variable. That is, "$*" is equivalent to "$1c$2c...", where c is the first character of the value of the IFS variable. If IFS is unset, the parameters are separated by spaces. If IFS is null, the parameters are joined without intervening separators.

@ Expands to the positional parameters, starting from one. When the expansion occurs within double quotes, each parameter expands to a separate word. That is, "$@" is equivalent to "$1" "$2" ... If the double-quoted expansion occurs within a word, the expansion of the first parameter is joined with the beginning part of the original word, and the expansion of the last parameter is joined with the last part of the original word. When there are no positional parameters, "$@" and $@ expand to nothing (i.e., they are removed).

Is there an "exists" function for jQuery?

Inspired by hiway's answer I came up with the following:

$.fn.exists = function() {
    return $.contains( document.documentElement, this[0] );
}

jQuery.contains takes two DOM elements and checks whether the first one contains the second one.

Using document.documentElement as the first argument fulfills the semantics of the exists method when we want to apply it solely to check the existence of an element in the current document.

Below, I've put together a snippet that compares jQuery.exists() against the $(sel)[0] and $(sel).length approaches which both return truthy values for $(4) while $(4).exists() returns false. In the context of checking for existence of an element in the DOM this seems to be the desired result.

_x000D_

$.fn.exists = function() {_x000D_
    return $.contains(document.documentElement, this[0]); _x000D_
  }_x000D_
  _x000D_
  var testFuncs = [_x000D_
    function(jq) { return !!jq[0]; },_x000D_
    function(jq) { return !!jq.length; },_x000D_
    function(jq) { return jq.exists(); },_x000D_
  ];_x000D_
    _x000D_
  var inputs = [_x000D_
    ["$()",$()],_x000D_
    ["$(4)",$(4)],_x000D_
    ["$('#idoexist')",$('#idoexist')],_x000D_
    ["$('#idontexist')",$('#idontexist')]_x000D_
  ];_x000D_
  _x000D_
  for( var i = 0, l = inputs.length, tr, input; i < l; i++ ) {_x000D_
    input = inputs[i][1];_x000D_
    tr = "<tr><td>" + inputs[i][0] + "</td><td>"_x000D_
          + testFuncs[0](input) + "</td><td>"_x000D_
          + testFuncs[1](input) + "</td><td>"_x000D_
          + testFuncs[2](input) + "</td></tr>";_x000D_
    $("table").append(tr);_x000D_
  }

_x000D_

td { border: 1px solid black }

_x000D_

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<div id="idoexist">#idoexist</div>_x000D_
<table style>_x000D_
<tr>_x000D_
  <td>Input</td><td>!!$(sel)[0]</td><td>!!$(sel).length</td><td>$(sel).exists()</td>_x000D_
</tr>_x000D_
</table>_x000D_
<script>_x000D_
  _x000D_
  $.fn.exists = function() {_x000D_
    return $.contains(document.documentElement, this[0]); _x000D_
  }_x000D_
  _x000D_
</script>

_x000D_

Are there any style options for the HTML5 Date picker?

FYI, I needed to update the color of the calendar icon which didn't seem possible with properties like color, fill, etc.

I did eventually figure out that some filter properties will adjust the icon so while i did not end up figuring out how to make it any color, luckily all I needed was to make it so the icon was visible on a dark background so I was able to do the following:

_x000D_

body { background: black; }_x000D_
_x000D_
input[type="date"] { _x000D_
  background: transparent;_x000D_
  color: white;_x000D_
}_x000D_
_x000D_
input[type="date"]::-webkit-calendar-picker-indicator {_x000D_
  filter: invert(100%);_x000D_
}

_x000D_

<body>_x000D_
 <input type="date" />_x000D_
</body>

_x000D_

Hopefully this helps some people as for the most part chrome even directly says this is impossible.

Response to preflight request doesn't pass access control check

A very common cause of this error could be that the host API had mapped the request to a http method (e.g. PUT) and the API client is calling the API using a different http method (e.g. POST or GET)

Stop fixed position at footer

I've made some changes to the second most popular answer as i found this worked better for me. The changes use window.innerHeight as it is more dynamic than adding your own height for the nav (above used + 570). this allows the code to work on mobile, tablet and desktop dynamicly.

$(window).scroll(() => {
            //Distance from top fo document to top of footer
            topOfFooter = $('#footer').position().top;
             // Distance user has scrolled from top + windows inner height
             scrollDistanceFromTopOfDoc = $(document).scrollTop() + window.innerHeight;
             // Difference between the two.
             scrollDistanceFromTopOfFooter = scrollDistanceFromTopOfDoc - topOfFooter; 
            // If user has scrolled further than footer,
              if (scrollDistanceFromTopOfDoc > topOfFooter) {
                // add margin-bottom so button stays above footer.
                $('#floating-button').css('margin-bottom',  0 + scrollDistanceFromTopOfFooter);
              } else  {
                // remove margin-bottom so button goes back to the bottom of the page
                $('#floating-button').css('margin-bottom', 0);
              }
            });

MYSQL Sum Query with IF Condition

Try with a CASE in this way :

SUM(CASE 
    WHEN PaymentType = "credit card" 
    THEN TotalAmount 
    ELSE 0 
END) AS CreditCardTotal,

Should give what you are looking for ...

What is the difference between And and AndAlso in VB.NET?

AndAlso is much like And, except it works like && in C#, C++, etc.

The difference is that if the first clause (the one before AndAlso) is true, the second clause is never evaluated - the compound logical expression is "short circuited".

This is sometimes very useful, e.g. in an expression such as:

If Not IsNull(myObj) AndAlso myObj.SomeProperty = 3 Then
   ...
End If

Using the old And in the above expression would throw a NullReferenceException if myObj were null.

jquery stop child triggering parent event

Do this:

$(document).ready(function(){
    $(".header").click(function(){
        $(this).children(".children").toggle();
    });
   $(".header a").click(function(e) {
        e.stopPropagation();
   });
});

If you want to read more on .stopPropagation(), look here.

How to install numpy on windows using pip install?

py -m pip install numpy

Worked for me!

HTML 5 input type="number" element for floating point numbers on Chrome

Try this

_x000D_

<input onkeypress='return event.charCode >= 48 && _x000D_
                          event.charCode <= 57 || _x000D_
                          event.charCode == 46'>

_x000D_

How to delete and recreate from scratch an existing EF Code First database

dbctx.Database.EnsureDeleted(); dbctx.Database.EnsureCreated();

Create folder with batch but only if it doesn't already exist

set myDIR=LOG
IF not exist %myDIR% (mkdir %myDIR%)

How to initialize/instantiate a custom UIView class with a XIB file in Swift

I tested this code and it works great:

class MyClass: UIView {        
    class func instanceFromNib() -> UIView {
        return UINib(nibName: "nib file name", bundle: nil).instantiateWithOwner(nil, options: nil)[0] as UIView
    }    
}

Initialise the view and use it like below:

var view = MyClass.instanceFromNib()
self.view.addSubview(view)

var view = MyClass.instanceFromNib
self.view.addSubview(view())

UPDATE Swift >=3.x & Swift >=4.x

class func instanceFromNib() -> UIView {
    return UINib(nibName: "nib file name", bundle: nil).instantiate(withOwner: nil, options: nil)[0] as! UIView
}

How to replace a string in a SQL Server Table Column

all answers are great but I just want to give you a good example

select replace('this value from table', 'table',  'table but updated')

this SQL statement will replace the existence of the word "table" (second parameter) inside the given statement(first parameter) with the third parameter

the initial value is this value from table but after executing replace function it will be this value from table but updated

and here is a real example

UPDATE publication
SET doi = replace(doi, '10.7440/perifrasis', '10.25025/perifrasis')
WHERE doi like '10.7440/perifrasis%'

for example if we have this value

10.7440/perifrasis.2010.1.issue-1

it will become

10.25025/perifrasis.2010.1.issue-1

hope this gives you better visualization

"cannot resolve symbol R" in Android Studio

I think if you put your Activities files to another folder than the default one. You need to import the com.example.yourproject.R (this is your project R file NOT Android.R file) to ALL activities using R. For example, in MainActivity file insert this line:

import com.example.yourproject.R;

Sorting objects by property values

Let us say we have to sort a list of objects in ascending order based on a particular property, in this example lets say we have to sort based on the "name" property, then below is the required code :

var list_Objects = [{"name"="Bob"},{"name"="Jay"},{"name"="Abhi"}];
Console.log(list_Objects);   //[{"name"="Bob"},{"name"="Jay"},{"name"="Abhi"}]
    list_Objects.sort(function(a,b){
        return a["name"].localeCompare(b["name"]); 
    });
Console.log(list_Objects);  //[{"name"="Abhi"},{"name"="Bob"},{"name"="Jay"}]

Createuser: could not connect to database postgres: FATAL: role "tom" does not exist

I had the same issue, i just do this

sudo su - postgres

createuser odoo -U postgres -dRSP #P for password (odoo or user name that you want o give the postgres access)

Pandas: Return Hour from Datetime Column Directly

You can use a lambda expression, e.g:

sales['time_hour'] = sales.timestamp.apply(lambda x: x.hour)

Nexus 7 not visible over USB via "adb devices" from Windows 7 x64

Complete checklist:

Enable debugging onto the device
Select USB Connection as PTP (camera)
Install the driver from http://developer.android.com/sdk/win-usb.html

insert data into database using servlet and jsp in eclipse

Check that doPost() method of servlet is called from the jsp form and remove conn.commit.

How to allow only one radio button to be checked?

Simply give them the same name:

<input type="radio" name="radAnswer" />

How do I install Python OpenCV through Conda?

I installed it like this:

$ conda install --channel https://conda.anaconda.org/conda-forge opencv

I tried conda install opencv directly, but it does not work for me since I am using Python 3.5 which is higher version that default OpenCV library in conda. Later, I tried 'anaconda/opencv', but it does not work either. I found finally that conda-forge/opencv works for Python 3.5.

Can I get div's background-image url?

Yes, that's possible:

$("#id-of-button").click(function() {
    var bg_url = $('#div1').css('background-image');
    // ^ Either "none" or url("...urlhere..")
    bg_url = /^url\((['"]?)(.*)\1\)$/.exec(bg_url);
    bg_url = bg_url ? bg_url[2] : ""; // If matched, retrieve url, otherwise ""
    alert(bg_url);
});

Getting the value of an attribute in XML

This is more of an xpath question, but like this, assuming the context is the parent element:

<xsl:value-of select="name/@attribute1" />

Simple UDP example to send and receive data from same socket

(I presume you are aware that using UDP(User Datagram Protocol) does not guarantee delivery, checks for duplicates and congestion control and will just answer your question).

In your server this line:

var data = udpServer.Receive(ref groupEP);

re-assigns groupEP from what you had to a the address you receive something on.

This line:

udpServer.Send(new byte[] { 1 }, 1);

Will not work since you have not specified who to send the data to. (It works on your client because you called connect which means send will always be sent to the end point you connected to, of course we don't want that on the server as we could have many clients). I would:

UdpClient udpServer = new UdpClient(UDP_LISTEN_PORT);

while (true)
{
    var remoteEP = new IPEndPoint(IPAddress.Any, 11000);
    var data = udpServer.Receive(ref remoteEP);
    udpServer.Send(new byte[] { 1 }, 1, remoteEP); // if data is received reply letting the client know that we got his data          
}

Also if you have server and client on the same machine you should have them on different ports.

Why is `input` in Python 3 throwing NameError: name... is not defined

I got the same error. In the terminal when I typed "python filename.py", with this command, python2 was tring to run python3 code, because the is written python3. It runs correctly when I type "python3 filename.py" in the terminal. I hope this works for you too.

'str' object does not support item assignment in Python

In Python, strings are immutable, so you can't change their characters in-place.

You can, however, do the following:

for i in str:
    srr += i

The reasons this works is that it's a shortcut for:

for i in str:
    srr = srr + i

The above creates a new string with each iteration, and stores the reference to that new string in srr.

How do I pretty-print existing JSON data with Java?

I fount a very simple solution:

<dependency>
    <groupId>com.cedarsoftware</groupId>
    <artifactId>json-io</artifactId>
    <version>4.5.0</version>
</dependency>

Java code:

import com.cedarsoftware.util.io.JsonWriter;
//...
String jsonString = "json_string_plain_text";
System.out.println(JsonWriter.formatJson(jsonString));

How to check postgres user and password?

You may change the pg_hba.conf and then reload the postgresql. something in the pg_hba.conf may be like below:

# "local" is for Unix domain socket connections only
local   all             all                                     trust
# IPv4 local connections:
host    all             all             127.0.0.1/32            trust

then you change your user to postgresql, you may login successfully.

su postgresql

Can Selenium interact with an existing browser session?

I'm using Rails + Cucumber + Selenium Webdriver + PhantomJS, and I've been using a monkey-patched version of Selenium Webdriver, which keeps PhantomJS browser open between test runs. See this blog post: http://blog.sharetribe.com/2014/04/07/faster-cucumber-startup-keep-phantomjs-browser-open-between-tests/

See also my answer to this post: How do I execute a command on already opened browser from a ruby file

Git merge error "commit is not possible because you have unmerged files"

I've had a similar issue which boiled down to removing files under "unmerged paths"

Those files had to be removed using git rm

How to get html table td cell value by JavaScript?

This is my solution

var cells = Array.prototype.slice.call(document.getElementById("tableI").getElementsByTagName("td"));
for(var i in cells){
    console.log("My contents is \"" + cells[i].innerHTML + "\"");
}

How to search for a file in the CentOS command line

CentOS is Linux, so as in just about all other Unix/Linux systems, you have the find command. To search for files within the current directory:

find -name "filename"

You can also have wildcards inside the quotes, and not just a strict filename. You can also explicitly specify a directory to start searching from as the first argument to find:

find / -name "filename"

will look for "filename" or all the files that match the regex expression in between the quotes, starting from the root directory. You can also use single quotes instead of double quotes, but in most cases you don't need either one, so the above commands will work without any quotes as well. Also, for example, if you're searching for java files and you know they are somewhere in your /home/username, do:

find /home/username -name *.java

There are many more options to the find command and you should do a:

man find

to learn more about it.

One more thing: if you start searching from / and are not root or are not sudo running the command, you might get warnings that you don't have permission to read certain directories. To ignore/remove those, do:

find / -name 'filename' 2>/dev/null

That just redirects the stderr to /dev/null.

Can you require two form fields to match with HTML5?

JavaScript will be required, but the amount of code can be kept to a minimum by using an intermediary <output> element and an oninput form handler to perform the comparison (patterns and validation could augment this solution, but aren't shown here for sake of simplicity):

<form oninput="result.value=!!p2.value&&(p1.value==p2.value)?'Match!':'Nope!'">
  <input type="password" name="p1" value="" required />
  <input type="password" name="p2" value="" required />
  <output name="result"></output>
</form>

What is the proper declaration of main in C++?

The main function must be declared as a non-member function in the global namespace. This means that it cannot be a static or non-static member function of a class, nor can it be placed in a namespace (even the unnamed namespace).

The name main is not reserved in C++ except as a function in the global namespace. You are free to declare other entities named main, including among other things, classes, variables, enumerations, member functions, and non-member functions not in the global namespace.

You can declare a function named main as a member function or in a namespace, but such a function would not be the main function that designates where the program starts.

The main function cannot be declared as static or inline. It also cannot be overloaded; there can be only one function named main in the global namespace.

The main function cannot be used in your program: you are not allowed to call the main function from anywhere in your code, nor are you allowed to take its address.

The return type of main must be int. No other return type is allowed (this rule is in bold because it is very common to see incorrect programs that declare main with a return type of void; this is probably the most frequently violated rule concerning the main function).

There are two declarations of main that must be allowed:

int main()               // (1)
int main(int, char*[])   // (2)

In (1), there are no parameters.

In (2), there are two parameters and they are conventionally named argc and argv, respectively. argv is a pointer to an array of C strings representing the arguments to the program. argc is the number of arguments in the argv array.

Usually, argv[0] contains the name of the program, but this is not always the case. argv[argc] is guaranteed to be a null pointer.

Note that since an array type argument (like char*[]) is really just a pointer type argument in disguise, the following two are both valid ways to write (2) and they both mean exactly the same thing:

int main(int argc, char* argv[])
int main(int argc, char** argv)

Some implementations may allow other types and numbers of parameters; you'd have to check the documentation of your implementation to see what it supports.

main() is expected to return zero to indicate success and non-zero to indicate failure. You are not required to explicitly write a return statement in main(): if you let main() return without an explicit return statement, it's the same as if you had written return 0;. The following two main() functions have the same behavior:

int main() { }
int main() { return 0; }

There are two macros, EXIT_SUCCESS and EXIT_FAILURE, defined in <cstdlib> that can also be returned from main() to indicate success and failure, respectively.

The value returned by main() is passed to the exit() function, which terminates the program.

Note that all of this applies only when compiling for a hosted environment (informally, an environment where you have a full standard library and there's an OS running your program). It is also possible to compile a C++ program for a freestanding environment (for example, some types of embedded systems), in which case startup and termination are wholly implementation-defined and a main() function may not even be required. If you're writing C++ for a modern desktop OS, though, you're compiling for a hosted environment.

How to grant all privileges to root user in MySQL 8.0

My Specs:

mysql --version
mysql  Ver 8.0.19 for Linux on x86_64 (MySQL Community Server - GPL)

What worked for me:

mysql> USE mysql;
mysql> UPDATE User SET Host='%' WHERE User='root' AND Host='localhost';

How to create a <style> tag with Javascript?

<style> tags should be places within the <head> element, and each added tag should be added to the bottom of the <head> tag.

Using insertAdjacentHTML to inject a style tag into the document head tag:

Native DOM:

_x000D_

document.head.insertAdjacentHTML("beforeend", `<style>body{background:red}</style>`)

_x000D_

jQuery:

_x000D_

$('<style>').text("body{background:red}").appendTo(document.head)

_x000D_

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

_x000D_

High CPU Utilization in java application - why?

Your first approach should be to find all references to Thread.sleep and check that:

Sleeping is the right thing to do - you should use some sort of wait mechanism if possible - perhaps careful use of a BlockingQueue would help.
If sleeping is the right thing to do, are you sleeping for the right amount of time - this is often a very difficult question to answer.

The most common mistake in multi-threaded design is to believe that all you need to do when waiting for something to happen is to check for it and sleep for a while in a tight loop. This is rarely an effective solution - you should always try to wait for the occurrence.

The second most common issue is to loop without sleeping. This is even worse and is a little less easy to track down.

Freeze screen in chrome debugger / DevTools panel for popover inspection?

Right click anywhere inside Elements Tab
Choose Breakon... > subtree modifications
Trigger the popup you want to see and it will freeze if it see changes in the DOM
If you still don't see the popup, click Step over the next function(F10) button beside Resume(F8) in the upper top center of the chrome until you freeze the popup you want to see.

SQL SELECT everything after a certain character

Try this in MySQL.

right(field,((CHAR_LENGTH(field))-(InStr(field,','))))

django - get() returned more than one topic

To add to CrazyGeek's answer, get or get_or_create queries work only when there's one instance of the object in the database, filter is for two or more.

If a query can be for single or multiple instances, it's best to add an ID to the div and use an if statement e.g.

def updateUserCollection(request):
    data = json.loads(request.body)
    card_id = data['card_id']
    action = data['action']

    user = request.user
    card = Cards.objects.get(card_id=card_id)

    if data-action == 'add':
        collection = Collection.objects.get_or_create(user=user, card=card)
        collection.quantity + 1
        collection.save()

    elif data-action == 'remove':
        collection = Cards.objects.filter(user=user, card=card)
        collection.quantity = 0
        collection.update()

Note: .save() becomes .update() for updating multiple objects. Hope this helps someone, gave me a long day's headache.

How to get the current taxonomy term ID (not the slug) in WordPress?

Nevermind! I found it :)

get_queried_object()->term_id;

Print Combining Strings and Numbers

Using print function without parentheses works with older versions of Python but is no longer supported on Python3, so you have to put the arguments inside parentheses. However, there are workarounds, as mentioned in the answers to this question. Since the support for Python2 has ended in Jan 1st 2020, the answer has been modified to be compatible with Python3.

You could do any of these (and there may be other ways):

(1)  print("First number is {} and second number is {}".format(first, second))
(1b) print("First number is {first} and number is {second}".format(first=first, second=second))

(2) print('First number is', first, 'second number is', second)

(Note: A space will be automatically added afterwards when separated from a comma)

(3) print('First number %d and second number is %d' % (first, second))

(4) print('First number is ' + str(first) + ' second number is' + str(second))

Using format() (1/1b) is preferred where available.

Get day of week in SQL Server 2005/2008

EUROPE:

declare @d datetime;
set @d=getdate();
set @dow=((datepart(dw,@d) + @@DATEFIRST-2) % 7+1);

How to enable mod_rewrite for Apache 2.2

If non of the above works try editing /etc/apache2/sites-enabled/000-default

almost at the top you will find

<Directory /var/www/>
    Options Indexes FollowSymLinks MultiViews
    AllowOverride None
    Order allow,deny
    allow from all
</Directory>

Change the AllowOverride None to AllowOverride All

this worked for me

Get a random item from a JavaScript array

Here's yet another way:

function rand(items) {
    // "~~" for a closest "int"
    return items[~~(items.length * Math.random())];
}

Or as recommended below by @1248177:

function rand(items) {
    // "|" for a kinda "int div"
    return items[items.length * Math.random() | 0];
}

Apply CSS rules to a nested class inside a div

You use

#main_text .title {
  /* Properties */
}

If you just put a space between the selectors, styles will apply to all children (and children of children) of the first. So in this case, any child element of #main_text with the class name title. If you use > instead of a space, it will only select the direct child of the element, and not children of children, e.g.:

#main_text > .title {
  /* Properties */
}

Either will work in this case, but the first is more typically used.

Tracking Google Analytics Page Views with AngularJS

The best way to do this is using Google Tag Manager to fire your Google Analytics tags based on history listeners. These are built in to the GTM interface and easily allow tracking on client side HTML5 interactions .

Enable the built in History variables and create a trigger to fire an event based on history changes.

Regular expression for only characters a-z, A-Z

With POSIX Bracket Expressions (not supported by Javascript) it can be done this way:

/[:alpha:]+/

Any alpha character A to Z or a to z.

/^[[:alpha:]]+$/s

to match strictly with spaces.

How to calculate the difference between two dates using PHP?

DateInterval is great but it has a couple of caveats:

only for PHP 5.3+ (but that's really not a good excuse anymore)
only supports years, months, days, hours, minutes and seconds (no weeks)
it calculates the difference with all of the above + days (you can't get the difference in months only)

To overcome that, I coded the following (improved from @enobrev answer):

function date_dif($since, $until, $keys = 'year|month|week|day|hour|minute|second')
{
    $date = array_map('strtotime', array($since, $until));

    if ((count($date = array_filter($date, 'is_int')) == 2) && (sort($date) === true))
    {
        $result = array_fill_keys(explode('|', $keys), 0);

        foreach (preg_grep('~^(?:year|month)~i', $result) as $key => $value)
        {
            while ($date[1] >= strtotime(sprintf('+%u %s', $value + 1, $key), $date[0]))
            {
                ++$value;
            }

            $date[0] = strtotime(sprintf('+%u %s', $result[$key] = $value, $key), $date[0]);
        }

        foreach (preg_grep('~^(?:year|month)~i', $result, PREG_GREP_INVERT) as $key => $value)
        {
            if (($value = intval(abs($date[0] - $date[1]) / strtotime(sprintf('%u %s', 1, $key), 0))) > 0)
            {
                $date[0] = strtotime(sprintf('+%u %s', $result[$key] = $value, $key), $date[0]);
            }
        }

        return $result;
    }

    return false;
}

It runs two loops; the first one deals with the relative intervals (years and months) via brute-forcing, and the second one computes the additional absolute intervals with simple arithmetic (so it's faster):

echo humanize(date_dif('2007-03-24', '2009-07-31', 'second')); // 74300400 seconds
echo humanize(date_dif('2007-03-24', '2009-07-31', 'minute|second')); // 1238400 minutes, 0 seconds
echo humanize(date_dif('2007-03-24', '2009-07-31', 'hour|minute|second')); // 20640 hours, 0 minutes, 0 seconds
echo humanize(date_dif('2007-03-24', '2009-07-31', 'year|day')); // 2 years, 129 days
echo humanize(date_dif('2007-03-24', '2009-07-31', 'year|week')); // 2 years, 18 weeks
echo humanize(date_dif('2007-03-24', '2009-07-31', 'year|week|day')); // 2 years, 18 weeks, 3 days
echo humanize(date_dif('2007-03-24', '2009-07-31')); // 2 years, 4 months, 1 week, 0 days, 0 hours, 0 minutes, 0 seconds

function humanize($array)
{
    $result = array();

    foreach ($array as $key => $value)
    {
        $result[$key] = $value . ' ' . $key;

        if ($value != 1)
        {
            $result[$key] .= 's';
        }
    }

    return implode(', ', $result);
}

C++ [Error] no matching function for call to

You are trying to call DeckOfCards::shuffle with a deckOfCards parameter:

deckOfCards cardDeck; // create DeckOfCards object
cardDeck.shuffle(cardDeck); // shuffle the cards in the deck

But the method takes a vector<Card>&:

void deckOfCards::shuffle(vector<Card>& deck)

The compiler error messages are quite clear on this. I'll paraphrase the compiler as it talks to you.

Error:

[Error] no matching function for call to 'deckOfCards::shuffle(deckOfCards&)'

Paraphrased:

Hey, pal. You're trying to call a function called shuffle which apparently takes a single parameter of type reference-to-deckOfCards, but there is no such function.

Error:

[Note] candidate is:

In file included from main.cpp

[Note] void deckOfCards::shuffle(std::vector&)

Paraphrased:

I mean, maybe you meant this other function called shuffle, but that one takes a reference-tovector<something>.

Error:

[Note] no known conversion for argument 1 from 'deckOfCards' to 'std::vector&'

Which I'd be happy to call if I knew how to convert from a deckOfCards to a vector; but I don't. So I won't.

Rename multiple files by replacing a particular pattern in the filenames using a shell script

An example to help you get off the ground.

for f in *.jpg; do mv "$f" "$(echo "$f" | sed s/IMG/VACATION/)"; done

In this example, I am assuming that all your image files contain the string IMG and you want to replace IMG with VACATION.

The shell automatically evaluates *.jpg to all the matching files.

The second argument of mv (the new name of the file) is the output of the sed command that replaces IMG with VACATION.

If your filenames include whitespace pay careful attention to the "$f" notation. You need the double-quotes to preserve the whitespace.

What's the effect of adding 'return false' to a click event listener?

The return value of an event handler determines whether or not the default browser behaviour should take place as well. In the case of clicking on links, this would be following the link, but the difference is most noticeable in form submit handlers, where you can cancel a form submission if the user has made a mistake entering the information.

I don't believe there is a W3C specification for this. All the ancient JavaScript interfaces like this have been given the nickname "DOM 0", and are mostly unspecified. You may have some luck reading old Netscape 2 documentation.

The modern way of achieving this effect is to call event.preventDefault(), and this is specified in the DOM 2 Events specification.

The default XML namespace of the project must be the MSBuild XML namespace

if the project is not a big ,

1- change the name of folder project

2- make a new project with the same project (before renaming)

3- add existing files from the old project to the new project (totally same , same folders , same names , ...)

4- open the the new project file (as xml ) and the old project

5- copy the new project file (xml content ) and paste it in the old project file

6- delete the old project

7- rename the old folder project to old name

splitting a string into an array in C++ without using vector

Here's a suggestion: use two indices into the string, say start and end. start points to the first character of the next string to extract, end points to the character after the last one belonging to the next string to extract. start starts at zero, end gets the position of the first char after start. Then you take the string between [start..end) and add that to your array. You keep going until you hit the end of the string.

VBA module that runs other modules

Is "Module1" part of the same workbook that contains "moduleController"?
If not, you could call public method of "Module1" using Application.Run someWorkbook.xlsm!methodOfModule.

Description for event id from source cannot be found

How about a real world solution.

If all you need is a "quick and dirty" way to write something to the event log without registering "custom sources" (requires admin rights), or providing "message files" (requires work and headache) just do this:

EventLog.WriteEntry(
    ".NET Runtime", //magic
    "Your error message goes here!!",
    EventLogEntryType.Warning,
    1000); //magic

This way you'll be writing to an existing "Application" log without the annoying "The description for Event ID 0 cannot be found"

If you want the "magic" part explained I blogged about it here

How to sort an ArrayList?

You can use Collections.sort(list) to sort list if your list contains Comparable elements. Otherwise I would recommend you to implement that interface like here:

public class Circle implements Comparable<Circle> {}

and of course provide your own realization of compareTo method like here:

@Override
    public int compareTo(Circle another) {
        if (this.getD()<another.getD()){
            return -1;
        }else{
            return 1;
        }
    }

And then you can again use Colection.sort(list) as now list contains objects of Comparable type and can be sorted. Order depends on compareTo method. Check this https://docs.oracle.com/javase/tutorial/collections/interfaces/order.html for more detailed information.

Algorithm to compare two images

In the form described by you, the problem is tough. Do you consider copy, paste of part of the image into another larger image as a copy ? etc.

If you take a step-back, this is easier to solve if you watermark the master images. You will need to use a watermarking scheme to embed a code into the image. To take a step back, as opposed to some of the low-level approaches (edge detection etc) suggested by some folks, a watermarking method is superior because:

It is resistant to Signal processing attacks ? Signal enhancement – sharpening, contrast, etc. ? Filtering – median, low pass, high pass, etc. ? Additive noise – Gaussian, uniform, etc. ? Lossy compression – JPEG, MPEG, etc.

It is resistant to Geometric attacks ? Affine transforms ? Data reduction – cropping, clipping, etc. ? Random local distortions ? Warping

Do some research on watermarking algorithms and you will be on the right path to solving your problem. ( Note: You can benchmark you method using the STIRMARK dataset. It is an accepted standard for this type of application.

Example of multipart/form-data

EDIT: I am maintaining a similar, but more in-depth answer at: https://stackoverflow.com/a/28380690/895245

To see exactly what is happening, use nc -l or an ECHO server and an user agent like a browser or cURL.

Save the form to an .html file:

<form action="http://localhost:8000" method="post" enctype="multipart/form-data">
  <p><input type="text" name="text" value="text default">
  <p><input type="file" name="file1">
  <p><input type="file" name="file2">
  <p><button type="submit">Submit</button>
</form>

Create files to upload:

echo 'Content of a.txt.' > a.txt
echo '<!DOCTYPE html><title>Content of a.html.</title>' > a.html

Run:

nc -l localhost 8000

Open the HTML on your browser, select the files and click on submit and check the terminal.

nc prints the request received. Firefox sent:

POST / HTTP/1.1
Host: localhost:8000
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:29.0) Gecko/20100101 Firefox/29.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Cookie: __atuvc=34%7C7; permanent=0; _gitlab_session=226ad8a0be43681acf38c2fab9497240; __profilin=p%3Dt; request_method=GET
Connection: keep-alive
Content-Type: multipart/form-data; boundary=---------------------------9051914041544843365972754266
Content-Length: 554

-----------------------------9051914041544843365972754266
Content-Disposition: form-data; name="text"

text default
-----------------------------9051914041544843365972754266
Content-Disposition: form-data; name="file1"; filename="a.txt"
Content-Type: text/plain

Content of a.txt.

-----------------------------9051914041544843365972754266
Content-Disposition: form-data; name="file2"; filename="a.html"
Content-Type: text/html

<!DOCTYPE html><title>Content of a.html.</title>

-----------------------------9051914041544843365972754266--

Aternativelly, cURL should send the same POST request as your a browser form:

nc -l localhost 8000
curl -F "text=default" -F "[email protected]" -F "[email protected]" localhost:8000

You can do multiple tests with:

while true; do printf '' | nc -l localhost 8000; done

Vertical align text in block element

DO NOT USE THE 4th solution from top if you are using ag-grid. It will fix the issue for aligning the element in middle but it might break the thing in ag-grid (for me i was not able to select checkbox after some row). Problem is not with the solution or ag-grid but somehow the combination is not good.

DO NOT USE THIS SOLUTION FOR AG-GRID

li a {
    width: 300px;
    height: 100px;
    margin: auto 0;
    display: inline-block;
    vertical-align: middle;
    background: red;  
}

li a:after {
    content:"";
    display: inline-block;
    width: 1px solid transparent;
    height: 100%;
    vertical-align: middle;
}

Regex to remove letters, symbols except numbers

Use /[^0-9.,]+/ if you want floats.

How to remove the focus from a TextBox in WinForms?

The way I get around it is to place all my winform controls. I make all labels and non-selecting winform controls as tab order 0, then my first control as tab order 2 and then increment each selectable control's order by 1, so 3, 4, 5 etc...

This way, when my Winforms start up, the first TextBox doesn't have focus!

Accessing the logged-in user in a template

You can access user data directly in the twig template without requesting anything in the controller. The user is accessible like that : app.user.

Now, you can access every property of the user. For example, you can access the username like that : app.user.username.

Warning, if the user is not logged, the app.user is null.

If you want to check if the user is logged, you can use the is_granted twig function. For example, if you want to check if the user has ROLE_ADMIN, you just have to do is_granted("ROLE_ADMIN").

So, in every of your pages you can do :

{% if is_granted("ROLE") %}
    Hi {{ app.user.username }}
{% endif %}

How to remove all .svn directories from my application directories

In Windows, you can use the following registry script to add "Delete SVN Folders" to your right click context menu. Run it on any directory containing those pesky files.

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Folder\shell\DeleteSVN]
@="Delete SVN Folders"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Folder\shell\DeleteSVN\command]
@="cmd.exe /c \"TITLE Removing SVN Folders in %1 && COLOR 9A && FOR /r \"%1\" %%f IN (.svn) DO RD /s /q \"%%f\" \""

Find and replace words/lines in a file

You can use Java's Scanner class to parse words of a file and process them in your application, and then use a BufferedWriter or FileWriter to write back to the file, applying the changes.

I think there is a more efficient way of getting the iterator's position of the scanner at some point, in order to better implement editting. But since files are either open for reading, or writing, I'm not sure regarding that.

In any case, you can use libraries already available for parsing of XML files, which have all of this implemented already and will allow you to do what you want easily.

Fastest way to check if a file exist using standard C++/C++11/C?

If you need to distinguish between a file and a directory, consider the following which both use stat which the fastest standard tool as demonstrated by PherricOxide:

#include <sys/stat.h>
int FileExists(char *path)
{
    struct stat fileStat; 
    if ( stat(path, &fileStat) )
    {
        return 0;
    }
    if ( !S_ISREG(fileStat.st_mode) )
    {
        return 0;
    }
    return 1;
}

int DirExists(char *path)
{
    struct stat fileStat;
    if ( stat(path, &fileStat) )
    {
        return 0;
    }
    if ( !S_ISDIR(fileStat.st_mode) )
    {
        return 0;
    }
    return 1;
}

How do I link object files in C? Fails with "Undefined symbols for architecture x86_64"

Since there's no mention of how to compile a .c file together with a bunch of .o files, and this comment asks for it:

where's the main.c in this answer? :/ if file1.c is the main, how do you link it with other already compiled .o files? – Tom Brito Oct 12 '14 at 19:45

$ gcc main.c lib_obj1.o lib_obj2.o lib_objN.o -o x0rbin

Here, main.c is the C file with the main() function and the object files (*.o) are precompiled. GCC knows how to handle these together, and invokes the linker accordingly and results in a final executable, which in our case is x0rbin.

You will be able to use functions not defined in the main.c but using an extern reference to functions defined in the object files (*.o).

You can also link with .obj or other extensions if the object files have the correct format (such as COFF).

Is it possible to import modules from all files in a directory, using a wildcard?

The current answers suggest a workaround but it's bugged me why this doesn't exist, so I've created a babel plugin which does this.

Install it using:

npm i --save-dev babel-plugin-wildcard

then add it to your .babelrc with:

{
    "plugins": ["wildcard"]
}

see the repo for detailed install info

This allows you to do this:

import * as Things from './lib/things';

// Do whatever you want with these :D
Things.ThingA;
Things.ThingB;
Things.ThingC;

again, the repo contains further information on what exactly it does, but doing it this way avoids creating index.js files and also happens at compile-time to avoid doing readdirs at runtime.

Also with a newer version you can do exactly like your example:

 import { ThingsA, ThingsB, ThingsC } from './lib/things/*';

works the same as the above.

Laravel Password & Password_Confirmation Validation

I have used in this way.. Working fine!

 $inputs = request()->validate([
        'name' => 'required | min:6 | max: 20',
        'email' => 'required',
        'password' => 'required| min:4| max:7 |confirmed',
        'password_confirmation' => 'required| min:4'
  ]);

Python speed testing - Time Difference - milliseconds

You could also use:

import time

start = time.clock()
do_something()
end = time.clock()
print "%.2gs" % (end-start)

Or you could use the python profilers.

Check if certain value is contained in a dataframe column in pandas

You can simply use this:

'07311954' in df.date.values which returns True or False

Here is the further explanation:

In pandas, using in check directly with DataFrame and Series (e.g. val in df or val in series ) will check whether the val is contained in the Index.

BUT you can still use in check for their values too (instead of Index)! Just using val in df.col_name.values or val in series.values. In this way, you are actually checking the val with a Numpy array.

And .isin(vals) is the other way around, it checks whether the DataFrame/Series values are in the vals. Here vals must be set or list-like. So this is not the natural way to go for the question.

How to get Spinner value?

Spinner mySpinner = (Spinner) findViewById(R.id.your_spinner);
String text = mySpinner.getSelectedItem().toString();

ORA-01034: ORACLE not available ORA-27101: shared memory realm does not exist

SQL> sqlplus "/ as sysdba"
SQL> startup

      Oracle instance started
      ------
      Database mounted.
      Database opened.

SQL> Quit

[oracle@hcis ~]$ lsnrctl start

What's the best way to iterate an Android Cursor?

Below could be the better way:

if (cursor.moveToFirst()) {
   while (!cursor.isAfterLast()) {
         //your code to implement
         cursor.moveToNext();
    }
}
cursor.close();

The above code would insure that it would go through entire iteration and won't escape first and last iteration.

How to delete an app from iTunesConnect / App Store Connect

Apps can’t be deleted if they are part of a Game Center group, in an app bundle, or currently displayed on a store. You’ll want to remove the app from sale or from the group if you want to delete it.

Source: iTunes Connect Developer Guide - Transferring and Deleting Apps

How is Perl's @INC constructed? (aka What are all the ways of affecting where Perl modules are searched for?)

We will look at how the contents of this array are constructed and can be manipulated to affect where the Perl interpreter will find the module files.

Default @INC

Perl interpreter is compiled with a specific @INC default value. To find out this value, run env -i perl -V command (env -i ignores the PERL5LIB environmental variable - see #2) and in the output you will see something like this:
```
$ env -i perl -V
...
@INC:
 /usr/lib/perl5/site_perl/5.18.0/x86_64-linux-thread-multi-ld
 /usr/lib/perl5/site_perl/5.18.0
 /usr/lib/perl5/5.18.0/x86_64-linux-thread-multi-ld
 /usr/lib/perl5/5.18.0
 .
```

Note . at the end; this is the current directory (which is not necessarily the same as the script's directory). It is missing in Perl 5.26+, and when Perl runs with -T (taint checks enabled).

To change the default path when configuring Perl binary compilation, set the configuration option otherlibdirs:

Configure -Dotherlibdirs=/usr/lib/perl5/site_perl/5.16.3

Environmental variable PERL5LIB (or PERLLIB)

Perl pre-pends @INC with a list of directories (colon-separated) contained in PERL5LIB (if it is not defined, PERLLIB is used) environment variable of your shell. To see the contents of @INC after PERL5LIB and PERLLIB environment variables have taken effect, run perl -V.
```
$ perl -V
...
%ENV:
  PERL5LIB="/home/myuser/test"
@INC:
 /home/myuser/test
 /usr/lib/perl5/site_perl/5.18.0/x86_64-linux-thread-multi-ld
 /usr/lib/perl5/site_perl/5.18.0
 /usr/lib/perl5/5.18.0/x86_64-linux-thread-multi-ld
 /usr/lib/perl5/5.18.0
 .
```
-I command-line option

Perl pre-pends @INC with a list of directories (colon-separated) passed as value of the -I command-line option. This can be done in three ways, as usual with Perl options:
- Pass it on command line:
```
perl -I /my/moduledir your_script.pl
```
- Pass it via the first line (shebang) of your Perl script:
```
#!/usr/local/bin/perl -w -I /my/moduledir
```
- Pass it as part of PERL5OPT (or PERLOPT) environment variable (see chapter 19.02 in Programming Perl)
Pass it via the lib pragma

Perl pre-pends @INC with a list of directories passed in to it via use lib.

In a program:
```
use lib ("/dir1", "/dir2");
```
On the command line:
```
perl -Mlib=/dir1,/dir2
```
You can also remove the directories from @INC via no lib.
You can directly manipulate @INC as a regular Perl array.

Note: Since @INC is used during the compilation phase, this must be done inside of a BEGIN {} block, which precedes the use MyModule statement.
- Add directories to the beginning via unshift @INC, $dir.
- Add directories to the end via push @INC, $dir.
- Do anything else you can do with a Perl array.

Note: The directories are unshifted onto @INC in the order listed in this answer, e.g. default @INC is last in the list, preceded by PERL5LIB, preceded by -I, preceded by use lib and direct @INC manipulation, the latter two mixed in whichever order they are in Perl code.

References:

There does not seem to be a comprehensive @INC FAQ-type post on Stack Overflow, so this question is intended as one.

When to use each approach?

If the modules in a directory need to be used by many/all scripts on your site, especially run by multiple users, that directory should be included in the default @INC compiled into the Perl binary.
If the modules in the directory will be used exclusively by a specific user for all the scripts that user runs (or if recompiling Perl is not an option to change default @INC in previous use case), set the users' PERL5LIB, usually during user login.

Note: Please be aware of the usual Unix environment variable pitfalls - e.g. in certain cases running the scripts as a particular user does not guarantee running them with that user's environment set up, e.g. via su.
If the modules in the directory need to be used only in specific circumstances (e.g. when the script(s) is executed in development/debug mode, you can either set PERL5LIB manually, or pass the -I option to perl.
If the modules need to be used only for specific scripts, by all users using them, use use lib/no lib pragmas in the program itself. It also should be used when the directory to be searched needs to be dynamically determined during runtime - e.g. from the script's command line parameters or script's path (see the FindBin module for very nice use case).
If the directories in @INC need to be manipulated according to some complicated logic, either impossible to too unwieldy to implement by combination of use lib/no lib pragmas, then use direct @INC manipulation inside BEGIN {} block or inside a special purpose library designated for @INC manipulation, which must be used by your script(s) before any other modules are used.

An example of this is automatically switching between libraries in prod/uat/dev directories, with waterfall library pickup in prod if it's missing from dev and/or UAT (the last condition makes the standard "use lib + FindBin" solution fairly complicated. A detailed illustration of this scenario is in How do I use beta Perl modules from beta Perl scripts?.
An additional use case for directly manipulating @INC is to be able to add subroutine references or object references (yes, Virginia, @INC can contain custom Perl code and not just directory names, as explained in When is a subroutine reference in @INC called?).

Change background color of edittext in android

You should use style instead of background color. Try searching holoeverywhere then I think this one will help you solve your problem

Using holoeverywhere

just change some of the 9patch resources to customize the edittext look and feel.

Can a main() method of class be invoked from another class in java

Yes as long as it is public and you pass the correct args. See this link for more information. http://www.codestyle.org/java/faq-CommandLine.shtml#mainhost

How to use and style new AlertDialog from appCompat 22.1 and above

When creating the AlertDialog you can set a theme to use.

Example - Creating the Dialog

AlertDialog.Builder builder = new AlertDialog.Builder(this, R.style.MyAlertDialogStyle);
builder.setTitle("AppCompatDialog");
builder.setMessage("Lorem ipsum dolor...");
builder.setPositiveButton("OK", null);
builder.setNegativeButton("Cancel", null);
builder.show();

styles.xml - Custom style

<style name="MyAlertDialogStyle" parent="Theme.AppCompat.Light.Dialog.Alert">
    <!-- Used for the buttons -->
    <item name="colorAccent">#FFC107</item>
    <!-- Used for the title and text -->
    <item name="android:textColorPrimary">#FFFFFF</item>
    <!-- Used for the background -->
    <item name="android:background">#4CAF50</item>
</style>

Result

styled alertdialog

Edit

In order to change the Appearance of the Title, you can do the following. First add a new style:

<style name="MyTitleTextStyle">
    <item name="android:textColor">#FFEB3B</item>
    <item name="android:textAppearance">@style/TextAppearance.AppCompat.Title</item>
</style>

afterwards simply reference this style in your MyAlertDialogStyle:

<style name="MyAlertDialogStyle" parent="Theme.AppCompat.Light.Dialog.Alert">
    ...
    <item name="android:windowTitleStyle">@style/MyTitleTextStyle</item>
</style>

This way you can define a different textColor for the message via android:textColorPrimary and a different for the title via the style.

Arraylist swap elements

Use like this. Here is the online compilation of the code. Take a look http://ideone.com/MJJwtc

public static void swap(List list,
                        int i,
                        int j)

Swaps the elements at the specified positions in the specified list. (If the specified positions are equal, invoking this method leaves the list unchanged.)

Parameters: list - The list in which to swap elements. i - the index of one element to be swapped. j - the index of the other element to be swapped.

Read The official Docs of collection

http://docs.oracle.com/javase/7/docs/api/java/util/Collections.html#swap%28java.util.List,%20int,%20int%29

import java.util.*;
import java.lang.*;

class Main {
    public static void main(String[] args) throws java.lang.Exception       
    {    
        //create an ArrayList object
        ArrayList words = new ArrayList();

        //Add elements to Arraylist
        words.add("A");
        words.add("B");
        words.add("C");
        words.add("D");
        words.add("E");

        System.out.println("Before swaping, ArrayList contains : " + words);

        /*
      To swap elements of Java ArrayList use,
      static void swap(List list, int firstElement, int secondElement)
      method of Collections class. Where firstElement is the index of first
      element to be swapped and secondElement is the index of the second element
      to be swapped.

      If the specified positions are equal, list remains unchanged.

      Please note that, this method can throw IndexOutOfBoundsException if
      any of the index values is not in range.        */

        Collections.swap(words, 0, words.size() - 1);

        System.out.println("After swaping, ArrayList contains : " + words);    

    }
}

Oneline compilation example http://ideone.com/MJJwtc

How to generate access token using refresh token through google drive API?

Using Post call, worked for me.

RestClient restClient = new RestClient();
RestRequest request = new RestRequest();

request.AddQueryParameter("client_id", "value");
request.AddQueryParameter("client_secret", "value");
request.AddQueryParameter("grant_type", "refresh_token");
request.AddQueryParameter("refresh_token", "value");

restClient.BaseUrl = new System.Uri("https://oauth2.googleapis.com/token");
restClient.Post(request);

https://youtu.be/aHs3edo0-mU

The iOS Simulator deployment targets is set to 7.0, but the range of supported deployment target version for this platform is 8.0 to 12.1

If anyone came here from react native issue, just delete the /build folder and type react-native run ios

Android SharedPreferences in Fragment

As a note of caution this answer provided by the user above me is correct.

SharedPreferences preferences = this.getActivity().getSharedPreferences("pref",0);

However, if you attempt to get anything in the fragment before onAttach is called getActivity() will return null.

How do I include a JavaScript file in another JavaScript file?

Statement import is in ECMAScript 6.

Syntax

import name from "module-name";
import { member } from "module-name";
import { member as alias } from "module-name";
import { member1 , member2 } from "module-name";
import { member1 , member2 as alias2 , [...] } from "module-name";
import name , { member [ , [...] ] } from "module-name";
import "module-name" as name;

Remove trailing spaces automatically or with a shortcut

Visual Studio Code, menu File → Preference → Settings → search for "trim":

Parsing Query String in node.js

node -v v9.10.1

If you try to console log query object directly you will get error TypeError: Cannot convert object to primitive value

So I would suggest use JSON.stringify

const http = require('http');
const url = require('url');

const server = http.createServer((req, res) => {
    const parsedUrl = url.parse(req.url, true);

    const path = parsedUrl.pathname, query = parsedUrl.query;
    const method = req.method;

    res.end("hello world\n");

    console.log(`Request received on: ${path} + method: ${method} + query: 
    ${JSON.stringify(query)}`);
    console.log('query: ', query);
  });


  server.listen(3000, () => console.log("Server running at port 3000"));

So doing curl http://localhost:3000/foo\?fizz\=buzz will return Request received on: /foo + method: GET + query: {"fizz":"buzz"}

builtins.TypeError: must be str, not bytes

Convert binary file to base64 & vice versa. Prove in python 3.5.2

import base64

read_file = open('/tmp/newgalax.png', 'rb')
data = read_file.read()

b64 = base64.b64encode(data)

print (b64)

# Save file
decode_b64 = base64.b64decode(b64)
out_file = open('/tmp/out_newgalax.png', 'wb')
out_file.write(decode_b64)

# Test in python 3.5.2

MySQLi count(*) always returns 1

Always try to do an associative fetch, that way you can easy get what you want in multiple case result

Here's an example

$result = $mysqli->query("SELECT COUNT(*) AS cityCount FROM myCity")
$row = $result->fetch_assoc();
echo $row['cityCount']." rows in table myCity.";

How to run shell script on host from docker container?

This answer is just a more detailed version of Bradford Medeiros's solution, which for me as well turned out to be the best answer, so the credit goes to him.

In his answer, he explains WHAT to do (named pipes) but not exactly HOW to do it.

I have to admit I didn't know what are named pipes at the time I read his solution. So I struggled to implement it (while it's actually really simple), but I did succeed, so I'm happy to help by explaining how I did it. So the point of my answer is just detailing the commands you need to run in order to get it working, but again, credit goes to him.

PART 1 - Testing the named pipe concept without docker

On the main host, chose the folder where you want to put your named pipe file, for instance /path/to/pipe/ and a pipe name, for instance mypipe, and then run:

mkfifo /path/to/pipe/mypipe

The pipe is created. Type

ls -l /path/to/pipe/mypipe

And check the access rights start with "p", such as

prw-r--r-- 1 root root 0 mypipe

Now run:

tail -f /path/to/pipe/mypipe

The terminal is now waiting for data to be sent into this pipe

Now open another terminal window.

And then run:

echo "hello world" > /path/to/pipe/mypipe

Check the first terminal (the one with tail -f), it should display "hello world"

PART 2 - Run commands through the pipe

On the host container, instead of running tail -f which just outputs whatever is sent as input, run this command that will execute it as commands:

eval "$(cat /path/to/pipe/mypipe)"

Then, from the other terminal, try running:

echo "ls -l" > /path/to/pipe/mypipe

Go back to the first terminal and you should see the result of the ls -l command.

PART 3 - Make it listen forever

You may have noticed that in the previous part, right after ls -l output is displayed, it stops listening for commands.

Instead of eval "$(cat /path/to/pipe/mypipe)", run:

while true; do eval "$(cat /path/to/pipe/mypipe)"; done

(you can nohup that)

Now you can send unlimited number of commands one after the other, they will all be executed, not just the first one.

PART 4 - Make it work even when reboot happens

The only caveat is if the host has to reboot, the "while" loop will stop working.

To handle reboot, here what I've done:

Put the while true; do eval "$(cat /path/to/pipe/mypipe)"; done in a file called execpipe.sh with #!/bin/bash header

Don't forget to chmod +x it

Add it to crontab by running

crontab -e

And then adding

@reboot /path/to/execpipe.sh

At this point, test it: reboot your server, and when it's back up, echo some commands into the pipe and check if they are executed. Of course, you aren't able to see the output of commands, so ls -l won't help, but touch somefile will help.

Another option is to modify the script to put the output in a file, such as:

while true; do eval "$(cat /path/to/pipe/mypipe)" &> /somepath/output.txt; done

Now you can run ls -l and the output (both stdout and stderr using &> in bash) should be in output.txt.

PART 5 - Make it work with docker

If you are using both docker compose and dockerfile like I do, here is what I've done:

Let's assume you want to mount the mypipe's parent folder as /hostpipe in your container

Add this:

VOLUME /hostpipe

in your dockerfile in order to create a mount point

Then add this:

volumes:
   - /path/to/pipe:/hostpipe

in your docker compose file in order to mount /path/to/pipe as /hostpipe

Restart your docker containers.

PART 6 - Testing

Exec into your docker container:

docker exec -it <container> bash

Go into the mount folder and check you can see the pipe:

cd /hostpipe && ls -l

Now try running a command from within the container:

echo "touch this_file_was_created_on_main_host_from_a_container.txt" > /hostpipe/mypipe

And it should work!

WARNING: If you have an OSX (Mac OS) host and a Linux container, it won't work (explanation here https://stackoverflow.com/a/43474708/10018801 and issue here https://github.com/docker/for-mac/issues/483 ) because the pipe implementation is not the same, so what you write into the pipe from Linux can be read only by a Linux and what you write into the pipe from Mac OS can be read only by a Mac OS (this sentence might not be very accurate, but just be aware that a cross-platform issue exists).

For instance, when I run my docker setup in DEV from my Mac OS computer, the named pipe as explained above does not work. But in staging and production, I have Linux host and Linux containers, and it works perfectly.

PART 7 - Example from Node.JS container

Here is how I send a command from my node js container to the main host and retrieve the output:

const pipePath = "/hostpipe/mypipe"
const outputPath = "/hostpipe/output.txt"
const commandToRun = "pwd && ls-l"

console.log("delete previous output")
if (fs.existsSync(outputPath)) fs.unlinkSync(outputPath)

console.log("writing to pipe...")
const wstream = fs.createWriteStream(pipePath)
wstream.write(commandToRun)
wstream.close()

console.log("waiting for output.txt...") //there are better ways to do that than setInterval
let timeout = 10000 //stop waiting after 10 seconds (something might be wrong)
const timeoutStart = Date.now()
const myLoop = setInterval(function () {
    if (Date.now() - timeoutStart > timeout) {
        clearInterval(myLoop);
        console.log("timed out")
    } else {
        //if output.txt exists, read it
        if (fs.existsSync(outputPath)) {
            clearInterval(myLoop);
            const data = fs.readFileSync(outputPath).toString()
            if (fs.existsSync(outputPath)) fs.unlinkSync(outputPath) //delete the output file
            console.log(data) //log the output of the command
        }
    }
}, 300);

How to export table data in MySql Workbench to csv?

U can use mysql dump or query to export data to csv file

SELECT *
INTO OUTFILE '/tmp/products.csv'
FIELDS TERMINATED BY ','
ENCLOSED BY '"'
ESCAPED BY '\\'
LINES TERMINATED BY '\n'
FROM products

MSIE and addEventListener Problem in Javascript?

As of IE11, you need to use addEventListener. attachEvent is deprecated and throws an error.

What is the difference between '/' and '//' when used for division?

The above answers are good. I want to add another point. Up to some values both of them result in the same quotient. After that floor division operator (//) works fine but not division (/) operator.

 - > int(755349677599789174/2)
 - > 377674838799894592      #wrong answer
 - > 755349677599789174 //2
 - > 377674838799894587      #correct answer

TimeStamp on file name using PowerShell

Use:

$filenameFormat = "mybackup.zip" + " " + (Get-Date -Format "yyyy-MM-dd")
Rename-Item -Path "C:\temp\mybackup.zip" -NewName $filenameFormat

How do I check two or more conditions in one <c:if>?

This look like a duplicate of JSTL conditional check.

The error is having the && outside the expression. Instead use

<c:if test="${ISAJAX == 0 && ISDATE == 0}">

Simple VBA selection: Selecting 5 cells to the right of the active cell

This example selects a new Range of Cells defined by the current cell to a cell 5 to the right.

Note that .Offset takes arguments of Offset(row, columns) and can be quite useful.

Sub testForStackOverflow()
    Range(ActiveCell, ActiveCell.Offset(0, 5)).Copy
End Sub

Best HTTP Authorization header type for JWT

The best HTTP header for your client to send an access token (JWT or any other token) is the Authorization header with the Bearer authentication scheme.

This scheme is described by the RFC6750.

Example:

GET /resource HTTP/1.1
Host: server.example.com
Authorization: Bearer eyJhbGciOiJIUzI1NiIXVCJ9TJV...r7E20RMHrHDcEfxjoYZgeFONFh7HgQ

If you need stronger security protection, you may also consider the following IETF draft: https://tools.ietf.org/html/draft-ietf-oauth-pop-architecture. This draft seems to be a good alternative to the (abandoned?) https://tools.ietf.org/html/draft-ietf-oauth-v2-http-mac.

Note that even if this RFC and the above specifications are related to the OAuth2 Framework protocol, they can be used in any other contexts that require a token exchange between a client and a server.

Unlike the custom JWT scheme you mention in your question, the Bearer one is registered at the IANA.

Concerning the Basic and Digest authentication schemes, they are dedicated to authentication using a username and a secret (see RFC7616 and RFC7617) so not applicable in that context.

nano error: Error opening terminal: xterm-256color

I can confirm this is a terminfo issue. This is what worked for me. SSH in to the remote machine and run

 sudo apt-get install ncurses-term

Boom. Problem solved.

Android Drawing Separator/Divider Line in Layout?

if you use actionBarSherlock, you can use the com.actionbarsherlock.internal.widget.IcsLinearLayout class in order to support dividers and show them between the views .

example of usage:

<com.actionbarsherlock.internal.widget.IcsLinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_alignParentBottom="true"
    android:layout_alignParentLeft="true"
    android:divider="@drawable/divider"
    android:dividerPadding="10dp"
    android:orientation="vertical"
    android:showDividers="beginning|middle|end" >
... children...

res/drawable/divider.xml :

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >

    <size android:height="2dip" />

    <solid android:color="#FFff0000" />

</shape>

do note that for some reason, the preview in the graphical designer says "android.graphics.bitmap_delegate.nativeRecycle(I)Z" . not sure what it means, but it can be ignored as it works fine on both new versions of android and old ones (tested on android 4.2 and 2.3) .

seems the error is only shown when using API17 for the graphical designer.

How do I load an HTML page in a <div> using JavaScript?

You can use the jQuery :

$("#topBar").on("click",function(){
        $("#content").load("content.html");
});

Relative paths in Python

Hi first of all you should understand functions os.path.abspath(path) and os.path.relpath(path)

In short os.path.abspath(path) makes a relative path to absolute path. And if the path provided is itself a absolute path then the function returns the same path.

similarly os.path.relpath(path) makes a absolute path to relative path. And if the path provided is itself a relative path then the function returns the same path.

Below example can let you understand the above concept properly:

suppose i have a file input_file_list.txt which contains list of input files to be processed by my python script.

D:\conc\input1.dic

D:\conc\input2.dic

D:\Copyioconc\input_file_list.txt

If you see above folder structure, input_file_list.txt is present in Copyofconc folder and the files to be processed by the python script are present in conc folder

But the content of the file input_file_list.txt is as shown below:

..\conc\input1.dic

..\conc\input2.dic

And my python script is present in D: drive.

And the relative path provided in the input_file_list.txt file are relative to the path of input_file_list.txt file.

So when python script shall executed the current working directory (use os.getcwd() to get the path)

As my relative path is relative to input_file_list.txt, that is "D:\Copyofconc", i have to change the current working directory to "D:\Copyofconc".

So i have to use os.chdir('D:\Copyofconc'), so the current working directory shall be "D:\Copyofconc".

Now to get the files input1.dic and input2.dic, i will read the lines "..\conc\input1.dic" then shall use the command

input1_path= os.path.abspath('..\conc\input1.dic') (to change relative path to absolute path. Here as current working directory is "D:\Copyofconc", the file ".\conc\input1.dic" shall be accessed relative to "D:\Copyofconc")

so input1_path shall be "D:\conc\input1.dic"

Increasing Google Chrome's max-connections-per-server limit to more than 6

IE is even worse with 2 connection per domain limit. But I wouldn't rely on fixing client browsers. Even if you have control over them, browsers like chrome will auto update and a future release might behave differently than you expect. I'd focus on solving the problem within your system design.

Your choices are to:

Load the images in sequence so that only 1 or 2 XHR calls are active at a time (use the success event from the previous image to check if there are more images to download and start the next request).
Use sub-domains like serverA.myphotoserver.com and serverB.myphotoserver.com. Each sub domain will have its own pool for connection limits. This means you could have 2 requests going to 5 different sub-domains if you wanted to. The downfall is that the photos will be cached according to these sub-domains. BTW, these don't need to be "mirror" domains, you can just make additional DNS pointers to the exact same website/server. This means you don't have the headache of administrating many servers, just one server with many DNS records.

Setting the selected attribute on a select list using jQuery

Code:

var select = function(dropdown, selectedValue) {
    var options = $(dropdown).find("option");
    var matches = $.grep(options,
        function(n) { return $(n).text() == selectedValue; });
    $(matches).attr("selected", "selected");
};

Example:

select("#dropdown", "B");

Cassandra port usage - how are the ports used?

Ports 57311 and 57312 are randomly assigned ports used for RMI communication. These ports change each time Cassandra starts up, but need to be open in the firewall, along with 8080/7199 (depending on version), to allow for remote JMX access. Something that doesn't appear to be particularly well documented, but has tripped me up in the past.

How to make UIButton's text alignment center? Using IB

UIButton will not support setTextAlignment. So You need to go with setContentHorizontalAlignment for button text alignment

For your reference

[buttonName setContentHorizontalAlignment:UIControlContentHorizontalAlignmentCenter];

Html table with button on each row

Pretty sure this solves what you're looking for:

HTML:

<table>
    <tr><td><button class="editbtn">edit</button></td></tr>
    <tr><td><button class="editbtn">edit</button></td></tr>
    <tr><td><button class="editbtn">edit</button></td></tr>
    <tr><td><button class="editbtn">edit</button></td></tr>
</table>

Javascript (using jQuery):

$(document).ready(function(){
    $('.editbtn').click(function(){
        $(this).html($(this).html() == 'edit' ? 'modify' : 'edit');
    });
});

Edit:

Apparently I should have looked at your sample code first ;)

You need to change (at least) the ID attribute of each element. The ID is the unique identifier for each element on the page, meaning that if you have multiple items with the same ID, you'll get conflicts.

By using classes, you can apply the same logic to multiple elements without any conflicts.

JSFiddle sample

how to select rows based on distinct values of A COLUMN only

if you dont wanna use DISTINCT use GROUP BY

 SELECT * FROM myTABLE GROUP BY EmailAddress

Creating new table with SELECT INTO in SQL

The syntax for creating a new table is

CREATE TABLE new_table
AS
SELECT *
  FROM old_table

This will create a new table named new_table with whatever columns are in old_table and copy the data over. It will not replicate the constraints on the table, it won't replicate the storage attributes, and it won't replicate any triggers defined on the table.

SELECT INTO is used in PL/SQL when you want to fetch data from a table into a local variable in your PL/SQL block.

.NET End vs Form.Close() vs Application.Exit Cleaner way to close one's app

Form.Close() is use to close an instance of a Form with in .NET application it does not kill the entire application. Application.exit() kills your application.

How do I declare a namespace in JavaScript?

You can declare a simple function to provide namespaces.

function namespace(namespace) {
    var object = this, tokens = namespace.split("."), token;

    while (tokens.length > 0) {
        token = tokens.shift();

        if (typeof object[token] === "undefined") {
            object[token] = {};
        }

        object = object[token];
    }

    return object;
}

// Usage example
namespace("foo.bar").baz = "I'm a value!";

findViewByID returns null

In my experience, it seems that this can also happen when your code is called after OnDestroyView (when the fragment is on the back stack.) If you are updating the UI on input from a BroadCastReceiver, you ought to check if this is the case.

Problems after upgrading to Xcode 10: Build input file cannot be found

I fixed this issue this way: go to your project's Build Phases (click on project icon at the top, and then click on Build Phases). Search for your file there. If it's there (it'll be grayed out), delete it. Then clean (shift + alt + command + k), and run! Hope it helps.

Pressing Ctrl + A in Selenium WebDriver

I found that in Ruby, you can pass two arguments to send_keys

Like this:

element.send_keys(:control, 'A')

How to get an HTML element's style values in javascript?

I believe you are now able to use Window.getComputedStyle()

Documentation MDN

var style = window.getComputedStyle(element[, pseudoElt]);

Example to get width of an element:

window.getComputedStyle(document.querySelector('#mainbar')).width

Insert multiple values using INSERT INTO (SQL Server 2005)

In SQL Server 2008,2012,2014 you can insert multiple rows using a single SQL INSERT statement.

 INSERT INTO TableName ( Column1, Column2 ) VALUES
    ( Value1, Value2 ), ( Value1, Value2 )

Another way

INSERT INTO TableName (Column1, Column2 )
SELECT Value1 ,Value2
UNION ALL
SELECT Value1 ,Value2
UNION ALL
SELECT Value1 ,Value2
UNION ALL
SELECT Value1 ,Value2
UNION ALL
SELECT Value1 ,Value2

Python: avoiding pylint warnings about too many arguments

I came across the same nagging error, which I realized has something to do with a cool feature PyCharm automatically detects...just add the @staticmethod decorator, and it will automatically remove that error where the method is used

C++/CLI Converting from System::String^ to std::string

I found an easy way to get a std::string from a String^ is to use sprintf().

char cStr[50] = { 0 };
String^ clrString = "Hello";
if (clrString->Length < sizeof(cStr))
  sprintf(cStr, "%s", clrString);
std::string stlString(cStr);

No need to call the Marshal functions!

UPDATE Thanks to Eric, I've modified the sample code to check for the size of the input string to prevent buffer overflow.

how to make div click-able?

Give it an ID like "something", then:

var something = document.getElementById('something');

something.style.cursor = 'pointer';
something.onclick = function() {
    // do something...
};

Changing the background color (as per your updated question):

something.onmouseover = function() {
    this.style.backgroundColor = 'red';
};
something.onmouseout = function() {
    this.style.backgroundColor = '';
};

How do you find out the type of an object (in Swift)?

If you get an "always true/fails" warning you may need to cast to Any before using is

(foo as Any) is SomeClass

How do I force a favicon refresh?

Depending on the browser they are handled differently, but typically I find that going to the default page of the site, and doing a hard refresh. CTRL + F5, will typically get it to update.

Generate MD5 hash string with T-SQL

You didn't explicitly say you wanted the string to be hex; if you are open to the more space efficient base 64 string encoding, and you are using SQL Server 2016 or later, here's an alternative:

select SubString(h, 1, 32) from OpenJson(
    (select HashBytes('MD5', '[email protected]') h for json path)
) with (h nvarchar(max));

This produces:

9TvQiSDl0lgJ3yVj75xStg==

Deadly CORS when http://localhost is the origin

Per @Beau's answer, Chrome does not support localhost CORS requests, and there is unlikely any change in this direction.

I use the Allow-Control-Allow-Origin: * Chrome Extension to go around this issue. The extension will add the necessary HTTP Headers for CORS:

Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: "GET, PUT, POST, DELETE, HEAD, OPTIONS"
Access-Control-Expose-Headers: <you can add values here>

The source code is published on Github.

Note that the extension filter all URLs by default. This may break some websites (for example: Dropbox). I have changed it to filter only localhost URLs with the following URL filter

*://localhost:*/*

Send POST request with JSON data using Volley

I know that this thread is quite old, but I had this problem and I came up with a cool solution which can be very useful to many because it corrects/extended the Volley library on many aspects.

I spotted some not supported-out-of-box Volley features:

This JSONObjectRequest is not perfect: you have to expect a JSON at the end (see the Response.Listener<JSONObject>).
What about Empty Responses (just with a 200 status)?
What do I do if I want directly my POJO from the ResponseListener?

I more or less compiled a lot of solutions in a big generic class in order to have a solution for all the problem I quoted.

  /**
  * Created by laurentmeyer on 25/07/15.
  */
 public class GenericRequest<T> extends JsonRequest<T> {

     private final Gson gson = new Gson();
     private final Class<T> clazz;
     private final Map<String, String> headers;
     // Used for request which do not return anything from the server
     private boolean muteRequest = false;

     /**
      * Basically, this is the constructor which is called by the others.
      * It allows you to send an object of type A to the server and expect a JSON representing a object of type B.
      * The problem with the #JsonObjectRequest is that you expect a JSON at the end.
      * We can do better than that, we can directly receive our POJO.
      * That's what this class does.
      *
      * @param method:        HTTP Method
      * @param classtype:     Classtype to parse the JSON coming from the server
      * @param url:           url to be called
      * @param requestBody:   The body being sent
      * @param listener:      Listener of the request
      * @param errorListener: Error handler of the request
      * @param headers:       Added headers
      */
     private GenericRequest(int method, Class<T> classtype, String url, String requestBody,
                           Response.Listener<T> listener, Response.ErrorListener errorListener, Map<String, String> headers) {
         super(method, url, requestBody, listener,
                 errorListener);
         clazz = classtype;
         this.headers = headers;
         configureRequest();
     }

     /**
      * Method to be called if you want to send some objects to your server via body in JSON of the request (with headers and not muted)
      *
      * @param method:        HTTP Method
      * @param url:           URL to be called
      * @param classtype:     Classtype to parse the JSON returned from the server
      * @param toBeSent:      Object which will be transformed in JSON via Gson and sent to the server
      * @param listener:      Listener of the request
      * @param errorListener: Error handler of the request
      * @param headers:       Added headers
      */
     public GenericRequest(int method, String url, Class<T> classtype, Object toBeSent,
                           Response.Listener<T> listener, Response.ErrorListener errorListener, Map<String, String> headers) {
         this(method, classtype, url, new Gson().toJson(toBeSent), listener,
                 errorListener, headers);
     }

     /**
      * Method to be called if you want to send some objects to your server via body in JSON of the request (without header and not muted)
      *
      * @param method:        HTTP Method
      * @param url:           URL to be called
      * @param classtype:     Classtype to parse the JSON returned from the server
      * @param toBeSent:      Object which will be transformed in JSON via Gson and sent to the server
      * @param listener:      Listener of the request
      * @param errorListener: Error handler of the request
      */
     public GenericRequest(int method, String url, Class<T> classtype, Object toBeSent,
                           Response.Listener<T> listener, Response.ErrorListener errorListener) {
         this(method, classtype, url, new Gson().toJson(toBeSent), listener,
                 errorListener, new HashMap<String, String>());
     }

     /**
      * Method to be called if you want to send something to the server but not with a JSON, just with a defined String (without header and not muted)
      *
      * @param method:        HTTP Method
      * @param url:           URL to be called
      * @param classtype:     Classtype to parse the JSON returned from the server
      * @param requestBody:   String to be sent to the server
      * @param listener:      Listener of the request
      * @param errorListener: Error handler of the request
      */
     public GenericRequest(int method, String url, Class<T> classtype, String requestBody,
                           Response.Listener<T> listener, Response.ErrorListener errorListener) {
         this(method, classtype, url, requestBody, listener,
                 errorListener, new HashMap<String, String>());
     }

     /**
      * Method to be called if you want to GET something from the server and receive the POJO directly after the call (no JSON). (Without header)
      *
      * @param url:           URL to be called
      * @param classtype:     Classtype to parse the JSON returned from the server
      * @param listener:      Listener of the request
      * @param errorListener: Error handler of the request
      */
     public GenericRequest(String url, Class<T> classtype, Response.Listener<T> listener, Response.ErrorListener errorListener) {
         this(Request.Method.GET, url, classtype, "", listener, errorListener);
     }

     /**
      * Method to be called if you want to GET something from the server and receive the POJO directly after the call (no JSON). (With headers)
      *
      * @param url:           URL to be called
      * @param classtype:     Classtype to parse the JSON returned from the server
      * @param listener:      Listener of the request
      * @param errorListener: Error handler of the request
      * @param headers:       Added headers
      */
     public GenericRequest(String url, Class<T> classtype, Response.Listener<T> listener, Response.ErrorListener errorListener, Map<String, String> headers) {
         this(Request.Method.GET, classtype, url, "", listener, errorListener, headers);
     }

     /**
      * Method to be called if you want to send some objects to your server via body in JSON of the request (with headers and muted)
      *
      * @param method:        HTTP Method
      * @param url:           URL to be called
      * @param classtype:     Classtype to parse the JSON returned from the server
      * @param toBeSent:      Object which will be transformed in JSON via Gson and sent to the server
      * @param listener:      Listener of the request
      * @param errorListener: Error handler of the request
      * @param headers:       Added headers
      * @param mute:          Muted (put it to true, to make sense)
      */
     public GenericRequest(int method, String url, Class<T> classtype, Object toBeSent,
                           Response.Listener<T> listener, Response.ErrorListener errorListener, Map<String, String> headers, boolean mute) {
         this(method, classtype, url, new Gson().toJson(toBeSent), listener,
                 errorListener, headers);
         this.muteRequest = mute;
     }

     /**
      * Method to be called if you want to send some objects to your server via body in JSON of the request (without header and muted)
      *
      * @param method:        HTTP Method
      * @param url:           URL to be called
      * @param classtype:     Classtype to parse the JSON returned from the server
      * @param toBeSent:      Object which will be transformed in JSON via Gson and sent to the server
      * @param listener:      Listener of the request
      * @param errorListener: Error handler of the request
      * @param mute:          Muted (put it to true, to make sense)
      */
     public GenericRequest(int method, String url, Class<T> classtype, Object toBeSent,
                           Response.Listener<T> listener, Response.ErrorListener errorListener, boolean mute) {
         this(method, classtype, url, new Gson().toJson(toBeSent), listener,
                 errorListener, new HashMap<String, String>());
         this.muteRequest = mute;

     }

     /**
      * Method to be called if you want to send something to the server but not with a JSON, just with a defined String (without header and not muted)
      *
      * @param method:        HTTP Method
      * @param url:           URL to be called
      * @param classtype:     Classtype to parse the JSON returned from the server
      * @param requestBody:   String to be sent to the server
      * @param listener:      Listener of the request
      * @param errorListener: Error handler of the request
      * @param mute:          Muted (put it to true, to make sense)
      */
     public GenericRequest(int method, String url, Class<T> classtype, String requestBody,
                           Response.Listener<T> listener, Response.ErrorListener errorListener, boolean mute) {
         this(method, classtype, url, requestBody, listener,
                 errorListener, new HashMap<String, String>());
         this.muteRequest = mute;

     }


     @Override
     protected Response<T> parseNetworkResponse(NetworkResponse response) {
         // The magic of the mute request happens here
         if (muteRequest) {
             if (response.statusCode >= 200 && response.statusCode <= 299) {
                 // If the status is correct, we return a success but with a null object, because the server didn't return anything
                 return Response.success(null, HttpHeaderParser.parseCacheHeaders(response));
             }
         } else {
             try {
                 // If it's not muted; we just need to create our POJO from the returned JSON and handle correctly the errors
                 String json = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
                 T parsedObject = gson.fromJson(json, clazz);
                 return Response.success(parsedObject, HttpHeaderParser.parseCacheHeaders(response));
             } catch (UnsupportedEncodingException e) {
                 return Response.error(new ParseError(e));
             } catch (JsonSyntaxException e) {
                 return Response.error(new ParseError(e));
             }
         }
         return null;
     }

     @Override
     public Map<String, String> getHeaders() throws AuthFailureError {
         return headers != null ? headers : super.getHeaders();
     }

     private void configureRequest() {
         // Set retry policy
         // Add headers, for auth for example
         // ...
     }
 }

It could seem a bit overkill but it's pretty cool to have all these constructors because you have all the cases:

(The main constructor wasn't meant to be used directly although it's, of course, possible).

Request with response parsed to POJO / Headers manually set / POJO to Send
Request with response parsed to POJO / POJO to Send
Request with response parsed to POJO / String to Send
Request with response parsed to POJO (GET)
Request with response parsed to POJO (GET) / Headers manually set
Request with no response (200 - Empty Body) / Headers manually set / POJO to Send
Request with no response (200 - Empty Body) / POJO to Send
Request with no response (200 - Empty Body) / String to Send

Of course, in order that it works, you have to have Google's GSON Lib; just add:

compile 'com.google.code.gson:gson:x.y.z'

to your dependencies (current version is 2.3.1).

Font Awesome & Unicode

Bear in mind that you may need to include a version number too as you could be using either:

font-family: 'Font Awesome 5 Pro';

font-family: 'Font Awesome 5 Free';

Get size of all tables in database

From a command prompt using OSQL:

OSQL -E -d <*databasename*> -Q "exec sp_msforeachtable 'sp_spaceused [?]'" > result.txt

Import CSV file with mixed data types

For the case when you know how many columns of data there will be in your CSV file, one simple call to textscan like Amro suggests will be your best solution.

However, if you don't know a priori how many columns are in your file, you can use a more general approach like I did in the following function. I first used the function fgetl to read each line of the file into a cell array. Then I used the function textscan to parse each line into separate strings using a predefined field delimiter and treating the integer fields as strings for now (they can be converted to numeric values later). Here is the resulting code, placed in a function read_mixed_csv:

function lineArray = read_mixed_csv(fileName, delimiter)

  fid = fopen(fileName, 'r');         % Open the file
  lineArray = cell(100, 1);           % Preallocate a cell array (ideally slightly
                                      %   larger than is needed)
  lineIndex = 1;                      % Index of cell to place the next line in
  nextLine = fgetl(fid);              % Read the first line from the file
  while ~isequal(nextLine, -1)        % Loop while not at the end of the file
    lineArray{lineIndex} = nextLine;  % Add the line to the cell array
    lineIndex = lineIndex+1;          % Increment the line index
    nextLine = fgetl(fid);            % Read the next line from the file
  end
  fclose(fid);                        % Close the file

  lineArray = lineArray(1:lineIndex-1);              % Remove empty cells, if needed
  for iLine = 1:lineIndex-1                          % Loop over lines
    lineData = textscan(lineArray{iLine}, '%s', ...  % Read strings
                        'Delimiter', delimiter);
    lineData = lineData{1};                          % Remove cell encapsulation
    if strcmp(lineArray{iLine}(end), delimiter)      % Account for when the line
      lineData{end+1} = '';                          %   ends with a delimiter
    end
    lineArray(iLine, 1:numel(lineData)) = lineData;  % Overwrite line data
  end

end

Running this function on the sample file content from the question gives this result:

>> data = read_mixed_csv('myfile.csv', ';')

data = 

  Columns 1 through 7

    '04'    'abc'    'def'    'ghj'    'klm'    ''            ''        
    ''      ''       ''       ''       ''       'Test'        'text'    
    ''      ''       ''       ''       ''       'asdfhsdf'    'dsafdsag'

  Columns 8 through 10

    ''          ''    ''
    '0xFF'      ''    ''
    '0x0F0F'    ''    ''

The result is a 3-by-10 cell array with one field per cell where missing fields are represented by the empty string ''. Now you can access each cell or a combination of cells to format them as you like. For example, if you wanted to change the fields in the first column from strings to integer values, you could use the function str2double as follows:

>> data(:, 1) = cellfun(@(s) {str2double(s)}, data(:, 1))

data = 

  Columns 1 through 7

    [  4]    'abc'    'def'    'ghj'    'klm'    ''            ''        
    [NaN]    ''       ''       ''       ''       'Test'        'text'    
    [NaN]    ''       ''       ''       ''       'asdfhsdf'    'dsafdsag'

  Columns 8 through 10

    ''          ''    ''
    '0xFF'      ''    ''
    '0x0F0F'    ''    ''

Note that the empty fields results in NaN values.

How to properly overload the << operator for an ostream?

Assuming that we're talking about overloading operator << for all classes derived from std::ostream to handle the Matrix class (and not overloading << for Matrix class), it makes more sense to declare the overload function outside the Math namespace in the header.

Use a friend function only if the functionality cannot be achieved via the public interfaces.

Matrix.h

namespace Math { 
    class Matrix { 
        //...
    };  
}
std::ostream& operator<<(std::ostream&, const Math::Matrix&);

Note that the operator overload is declared outside the namespace.

Matrix.cpp

using namespace Math;
using namespace std;

ostream& operator<< (ostream& os, const Matrix& obj) {
    os << obj.getXYZ() << obj.getABC() << '\n';
    return os;
}

On the other hand, if your overload function does need to be made a friend i.e. needs access to private and protected members.

Math.h

namespace Math {
    class Matrix {
        public:
            friend std::ostream& operator<<(std::ostream&, const Matrix&);
    };
}

You need to enclose the function definition with a namespace block instead of just using namespace Math;.

Matrix.cpp

using namespace Math;
using namespace std;

namespace Math {
    ostream& operator<<(ostream& os, const Matrix& obj) {
        os << obj.XYZ << obj.ABC << '\n';
        return os;
    }                 
}

JavaScript Adding an ID attribute to another created Element

You set an element's id by setting its corresponding property:

myPara.id = ID;

docker: executable file not found in $PATH

I had the same problem, After lots of googling, I couldn't find out how to fix it.

Suddenly I noticed my stupid mistake :)

As mentioned in the docs, the last part of docker run is the command you want to run and its arguments after loading up the container.

NOT THE CONTAINER NAME !!!

That was my embarrassing mistake.

Below I provided you with the picture of my command line to see what I have done wrong.

And this is the fix as mentioned in the docs.

PHP Pass by reference in foreach

First loop

$v = $a[0];
$v = $a[1];
$v = $a[2];
$v = $a[3];

Yes! Current $v = $a[3] position.

Second loop

$a[3] = $v = $a[0], echo $v; // same as $a[3] and $a[0] == 'zero'
$a[3] = $v = $a[1], echo $v; // same as $a[3] and $a[1] == 'one'
$a[3] = $v = $a[2], echo $v; // same as $a[3] and $a[2] == 'two'
$a[3] = $v = $a[3], echo $v; // same as $a[3] and $a[3] == 'two'

because $a[3] is assigned by before processing.

How to extend available properties of User.Identity

Dhaust gives a good way to add the property to the ApplicationUser class. Looking at the OP code it appears they may have done this or were on track to do that. The question asks

How can I retrieve the OrganizationId property of the currently logged in user from within a controller? However, OrganizationId is not a property available in User.Identity. Do I need to extend User.Identity to include the OrganizationId property?

Pawel gives a way to add an extension method that requires using statements or adding the namespace to the web.config file.

However, the question asks if you "need to" extend User.Identity to include the new property. There is an alternative way to access the property without extending User.Identity. If you followed Dhaust method you can then use the following code in your controller to access the new property.

ApplicationDbContext db = new ApplicationDbContext();
var manager = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(db));
var currentUser = manager.FindById(User.Identity.GetUserId());
var myNewProperty = currentUser.OrganizationId;

How to install Selenium WebDriver on Mac OS

Mac already has Python and a package manager called easy_install, so open Terminal and type

sudo easy_install selenium

How to create a Multidimensional ArrayList in Java?

You can have ArrayList with elements which would be ArrayLists itself.

#1130 - Host ‘localhost’ is not allowed to connect to this MySQL server

Find the file "config.inc.php" under your phpMyAdmin directory and edit the following lines:

$cfg['Servers'][$i]['auth_type'] = 'config'; // config, http, cookie

$cfg['Servers'][$i]['user'] = 'root'; // MySQL user

$cfg['Servers'][$i]['password'] = 'TYPE_YOUR_PASSWORD_HERE'; // MySQL password

Note that the password used in the 'password' field must be the same for the MySQL root password. Also, you should check if root login is allowed in this line:

$cfg['Servers'][$i]['AllowRoot']     = TRUE;        // true = allow root login

This way you have your root password set.

Multiple values in single-value context

In case of a multi-value return function you can't refer to fields or methods of a specific value of the result when calling the function.

And if one of them is an error, it's there for a reason (which is the function might fail) and you should not bypass it because if you do, your subsequent code might also fail miserably (e.g. resulting in runtime panic).

However there might be situations where you know the code will not fail in any circumstances. In these cases you can provide a helper function (or method) which will discard the error (or raise a runtime panic if it still occurs).
This can be the case if you provide the input values for a function from code, and you know they work.
Great examples of this are the template and regexp packages: if you provide a valid template or regexp at compile time, you can be sure they can always be parsed without errors at runtime. For this reason the template package provides the Must(t *Template, err error) *Template function and the regexp package provides the MustCompile(str string) *Regexp function: they don't return errors because their intended use is where the input is guaranteed to be valid.

Examples:

// "text" is a valid template, parsing it will not fail
var t = template.Must(template.New("name").Parse("text"))

// `^[a-z]+\[[0-9]+\]$` is a valid regexp, always compiles
var validID = regexp.MustCompile(`^[a-z]+\[[0-9]+\]$`)

Back to your case

IF you can be certain Get() will not produce error for certain input values, you can create a helper Must() function which would not return the error but raise a runtime panic if it still occurs:

func Must(i Item, err error) Item {
    if err != nil {
        panic(err)
    }
    return i
}

But you should not use this in all cases, just when you're sure it succeeds. Usage:

val := Must(Get(1)).Value

Alternative / Simplification

You can even simplify it further if you incorporate the Get() call into your helper function, let's call it MustGet:

func MustGet(value int) Item {
    i, err := Get(value)
    if err != nil {
        panic(err)
    }
    return i
}

Usage:

val := MustGet(1).Value

See some interesting / related questions:

how to parse multiple returns in golang

Return map like 'ok' in Golang on normal functions

RadioGroup: How to check programmatically

Watch out! checking the radiobutton with setChecked() is not changing the state inside the RadioGroup. For example this method from the radioGroup will return a wrong result: getCheckedRadioButtonId().

Check the radioGroup always with

mOption.check(R.id.option1);

you've been warned ;)

How to correctly represent a whitespace character

The WhiteSpace CHAR can be referenced using ASCII Codes here. And Character# 32 represents a white space, Therefore:

char space = (char)32;

For example, you can use this approach to produce desired number of white spaces anywhere you want:

int _length = {desired number of white spaces}
string.Empty.PadRight(_length, (char)32));

jQuery get input value after keypress

I was looking for a ES6 example (so it could pass my linter) So for other people who are looking for the same:

$('#dSuggest').keyup((e) => {
    console.log(e.currentTarget.value);
});

I would also use keyup because you get the current value that is filled in.

Using Google Translate in C#

I found this code works for me:

public String Translate(String word)
{
    var toLanguage = "en";//English
    var fromLanguage = "de";//Deutsch
    var url = $"https://translate.googleapis.com/translate_a/single?client=gtx&sl={fromLanguage}&tl={toLanguage}&dt=t&q={HttpUtility.UrlEncode(word)}";
    var webClient = new WebClient
    {
        Encoding = System.Text.Encoding.UTF8
    };
    var result = webClient.DownloadString(url);
    try
    {
        result = result.Substring(4, result.IndexOf("\"", 4, StringComparison.Ordinal) - 4);
        return result;
    }
    catch
    {
        return "Error";
    }
}

How to layout multiple panels on a jFrame? (java)

The JPanel is actually only a container where you can put different elements in it (even other JPanels). So in your case I would suggest one big JPanel as some sort of main container for your window. That main panel you assign a Layout that suits your needs ( here is an introduction to the layouts).

After you set the layout to your main panel you can add the paint panel and the other JPanels you want (like those with the text in it..).

  JPanel mainPanel = new JPanel();
  mainPanel.setLayout(new BoxLayout(mainPanel, BoxLayout.Y_AXIS));

  JPanel paintPanel = new JPanel();
  JPanel textPanel = new JPanel();

  mainPanel.add(paintPanel);
  mainPanel.add(textPanel);

This is just an example that sorts all sub panels vertically (Y-Axis). So if you want some other stuff at the bottom of your mainPanel (maybe some icons or buttons) that should be organized with another layout (like a horizontal layout), just create again a new JPanel as a container for all the other stuff and set setLayout(new BoxLayout(mainPanel, BoxLayout.X_AXIS).

As you will find out, the layouts are quite rigid and it may be difficult to find the best layout for your panels. So don't give up, read the introduction (the link above) and look at the pictures – this is how I do it :)

Or you can just use NetBeans to write your program. There you have a pretty easy visual editor (drag and drop) to create all sorts of Windows and Frames. (only understanding the code afterwards is ... tricky sometimes.)

EDIT

Since there are some many people interested in this question, I wanted to provide a complete example of how to layout a JFrame to make it look like OP wants it to.

The class is called MyFrame and extends swings JFrame

public class MyFrame extends javax.swing.JFrame{

    // these are the components we need.
    private final JSplitPane splitPane;  // split the window in top and bottom
    private final JPanel topPanel;       // container panel for the top
    private final JPanel bottomPanel;    // container panel for the bottom
    private final JScrollPane scrollPane; // makes the text scrollable
    private final JTextArea textArea;     // the text
    private final JPanel inputPanel;      // under the text a container for all the input elements
    private final JTextField textField;   // a textField for the text the user inputs
    private final JButton button;         // and a "send" button

    public MyFrame(){

        // first, lets create the containers:
        // the splitPane devides the window in two components (here: top and bottom)
        // users can then move the devider and decide how much of the top component
        // and how much of the bottom component they want to see.
        splitPane = new JSplitPane();

        topPanel = new JPanel();         // our top component
        bottomPanel = new JPanel();      // our bottom component

        // in our bottom panel we want the text area and the input components
        scrollPane = new JScrollPane();  // this scrollPane is used to make the text area scrollable
        textArea = new JTextArea();      // this text area will be put inside the scrollPane

        // the input components will be put in a separate panel
        inputPanel = new JPanel();
        textField = new JTextField();    // first the input field where the user can type his text
        button = new JButton("send");    // and a button at the right, to send the text

        // now lets define the default size of our window and its layout:
        setPreferredSize(new Dimension(400, 400));     // let's open the window with a default size of 400x400 pixels
        // the contentPane is the container that holds all our components
        getContentPane().setLayout(new GridLayout());  // the default GridLayout is like a grid with 1 column and 1 row,
        // we only add one element to the window itself
        getContentPane().add(splitPane);               // due to the GridLayout, our splitPane will now fill the whole window

        // let's configure our splitPane:
        splitPane.setOrientation(JSplitPane.VERTICAL_SPLIT);  // we want it to split the window verticaly
        splitPane.setDividerLocation(200);                    // the initial position of the divider is 200 (our window is 400 pixels high)
        splitPane.setTopComponent(topPanel);                  // at the top we want our "topPanel"
        splitPane.setBottomComponent(bottomPanel);            // and at the bottom we want our "bottomPanel"

        // our topPanel doesn't need anymore for this example. Whatever you want it to contain, you can add it here
        bottomPanel.setLayout(new BoxLayout(bottomPanel, BoxLayout.Y_AXIS)); // BoxLayout.Y_AXIS will arrange the content vertically

        bottomPanel.add(scrollPane);                // first we add the scrollPane to the bottomPanel, so it is at the top
        scrollPane.setViewportView(textArea);       // the scrollPane should make the textArea scrollable, so we define the viewport
        bottomPanel.add(inputPanel);                // then we add the inputPanel to the bottomPanel, so it under the scrollPane / textArea

        // let's set the maximum size of the inputPanel, so it doesn't get too big when the user resizes the window
        inputPanel.setMaximumSize(new Dimension(Integer.MAX_VALUE, 75));     // we set the max height to 75 and the max width to (almost) unlimited
        inputPanel.setLayout(new BoxLayout(inputPanel, BoxLayout.X_AXIS));   // X_Axis will arrange the content horizontally

        inputPanel.add(textField);        // left will be the textField
        inputPanel.add(button);           // and right the "send" button

        pack();   // calling pack() at the end, will ensure that every layout and size we just defined gets applied before the stuff becomes visible
    }

    public static void main(String args[]){
        EventQueue.invokeLater(new Runnable(){
            @Override
            public void run(){
                new MyFrame().setVisible(true);
            }
        });
    }
}

Please be aware that this is only an example and there are multiple approaches to layout a window. It all depends on your needs and if you want the content to be resizable / responsive. Another really good approach would be the GridBagLayout which can handle quite complex layouting, but which is also quite complex to learn.

How To Show And Hide Input Fields Based On Radio Button Selection

<script type="text/javascript">
function Check() {
    if (document.getElementById('yesCheck').checked) {
        document.getElementById('ifYes').style.display = 'block';
    } 
    else {
        document.getElementById('ifYes').style.display = 'none';

   }
}

</script>
</head>
<body>
Select os :
<br>
Two
<input type="radio" onclick="Check();" value="Two" name="categor`enter code here`y" id="yesCheck"/>One
<input type="radio" onclick="Check();" value="One"name="category"/>
<br>
<div id="ifYes" style="display:none" >
Three<input type="radio" name="win" value="Three"/>
Four<input type="radio" name="win" value="Four"/>

scp from remote host to local host

There must be a user in the AllowUsers section, in the config file /etc/ssh/ssh_config, in the remote machine. You might have to restart sshd after editing the config file.

And then you can copy for example the file "test.txt" from a remote host to the local host

scp [email protected]:test.txt /local/dir

@cool_cs you can user ~ symbol ~/Users/djorge/Desktop if it's your home dir.

In UNIX, absolute paths must start with '/'.

Binding List<T> to DataGridView in WinForm

List does not implement IBindingList so the grid does not know about your new items.

Bind your DataGridView to a BindingList<T> instead.

var list = new BindingList<Person>(persons);
myGrid.DataSource = list;

But I would even go further and bind your grid to a BindingSource

var list = new List<Person>()
{
    new Person { Name = "Joe", },
    new Person { Name = "Misha", },
};
var bindingList = new BindingList<Person>(list);
var source = new BindingSource(bindingList, null);
grid.DataSource = source;

What is a superfast way to read large files line-by-line in VBA?

My two cents…

Not long ago I needed reading large files using VBA and noticed this question. I tested the three approaches to read data from a file to compare its speed and reliability for a wide range of file sizes and line lengths. The approaches are:

Line Input VBA statement
Using the File System Object (FSO)
Using Get VBA statement for the whole file and then parsing the string read as described in posts here

Each test case consists of three steps:

Test case setup that writes a text file containing given number of lines of the same given length filled by the known character pattern.
Integrity test. Read each file line and verify its length and contents.
File read speed test. Read each line of the file repeated 10 times.

As you can notice, Step #3 verifies the true file read speed (as asked in the question) while Step #2 verifies the file read integrity and therefore simulates real conditions when string parsing is needed.

The following chart shows the test results for the File read speed test. The file size is 64M bytes for all tests, and the tests differ in line length that varies from 2 bytes (not including CRLF) to 8M bytes.

No idea why it is not displayed any longer :(

CONCLUSION:

All the three methods are reliable for large files with normal and abnormal line lengths (please compare to Graeme Howard’s answer)
All the three methods produce almost equivalent file reading speed for normal line lengths
“Superfast way” (Method #3) works fine for extremely long lines while the other two don’t.
All this is applicable to different Offices, different PCs, for VBA and VB6

Error loading MySQLdb Module 'Did you install mysqlclient or MySQL-python?'

edit the init.py file in your project origin directory

import pymysql

pymysql.install_as_MySQLdb()

What should my Objective-C singleton look like?

Edit: This implementation obsoleted with ARC. Please have a look at How do I implement an Objective-C singleton that is compatible with ARC? for correct implementation.

All the implementations of initialize I've read in other answers share a common error.

+ (void) initialize {
  _instance = [[MySingletonClass alloc] init] // <----- Wrong!
}

+ (void) initialize {
  if (self == [MySingletonClass class]){ // <----- Correct!
      _instance = [[MySingletonClass alloc] init] 
  }
}

The Apple documentation recommend you check the class type in your initialize block. Because subclasses call the initialize by default. There exists a non-obvious case where subclasses may be created indirectly through KVO. For if you add the following line in another class:

[[MySingletonClass getInstance] addObserver:self forKeyPath:@"foo" options:0 context:nil]

Objective-C will implicitly create a subclass of MySingletonClass resulting in a second triggering of +initialize.

You may think that you should implicitly check for duplicate initialization in your init block as such:

- (id) init { <----- Wrong!
   if (_instance != nil) {
      // Some hack
   }
   else {
      // Do stuff
   }
  return self;
}

But you will shoot yourself in the foot; or worse give another developer the opportunity to shoot themselves in the foot.

- (id) init { <----- Correct!
   NSAssert(_instance == nil, @"Duplication initialization of singleton");
   self = [super init];
   if (self){
      // Do stuff
   }
   return self;
}

TL;DR, here's my implementation

@implementation MySingletonClass
static MySingletonClass * _instance;
+ (void) initialize {
   if (self == [MySingletonClass class]){
      _instance = [[MySingletonClass alloc] init];
   }
}

- (id) init {
   ZAssert (_instance == nil, @"Duplication initialization of singleton");
   self = [super init];
   if (self) {
      // Initialization
   }
   return self;
}

+ (id) getInstance {
   return _instance;
}
@end

(Replace ZAssert with our own assertion macro; or just NSAssert.)

Why can't I call a public method in another class?

You're trying to call an instance method on the class. To call an instance method on a class you must create an instance on which to call the method. If you want to call the method on non-instances add the static keyword. For example

class Example {
  public static string NonInstanceMethod() {
    return "static";
  }
  public string InstanceMethod() { 
    return "non-static";
  }
}

static void SomeMethod() {
  Console.WriteLine(Example.NonInstanceMethod());
  Console.WriteLine(Example.InstanceMethod());  // Does not compile
  Example v1 = new Example();
  Console.WriteLine(v1.InstanceMethod());
}

Can "list_display" in a Django ModelAdmin display attributes of ForeignKey fields?

I prefer this:

class CoolAdmin(admin.ModelAdmin):
    list_display = ('pk', 'submodel__field')

    @staticmethod
    def submodel__field(obj):
        return obj.submodel.field

a = open("file", "r"); a.readline() output without \n

That would be:

b.rstrip('\n')

If you want to strip space from each and every line, you might consider instead:

a.read().splitlines()

This will give you a list of lines, without the line end characters.

Laravel form html with PUT method for PUT routes

in your view blade change to

{{ Form::open(['action' => 'postcontroller@edit', 'method' => 'PUT', 'class' = 'your class here']) }}

<div>
{{ Form::textarea('textareanamehere', 'default value here', ['placeholder' => 'your place holder here', 'class' => 'your class here']) }}
</div>

<div>
{{ Form::submit('Update', ['class' => 'btn class here'])}}
</div>

{{ Form::close() }}

actually you can use raw form like your question. but i dont recomended it. dan itulah salah satu alasan agan belajar framework, simple, dan cepat. so kenapa pake raw form kalo ada yang lebih mudah. hehe. proud to be indonesian.

reference: Laravel Blade Form

Setting Curl's Timeout in PHP

There is a quirk with this that might be relevant for some people... From the PHP docs comments.

If you want cURL to timeout in less than one second, you can use CURLOPT_TIMEOUT_MS, although there is a bug/"feature" on "Unix-like systems" that causes libcurl to timeout immediately if the value is < 1000 ms with the error "cURL Error (28): Timeout was reached". The explanation for this behavior is:

"If libcurl is built to use the standard system name resolver, that portion of the transfer will still use full-second resolution for timeouts with a minimum timeout allowed of one second."

What this means to PHP developers is "You can't use this function without testing it first, because you can't tell if libcurl is using the standard system name resolver (but you can be pretty sure it is)"

The problem is that on (Li|U)nix, when libcurl uses the standard name resolver, a SIGALRM is raised during name resolution which libcurl thinks is the timeout alarm.

The solution is to disable signals using CURLOPT_NOSIGNAL. Here's an example script that requests itself causing a 10-second delay so you can test timeouts:

if (!isset($_GET['foo'])) {
    // Client
    $ch = curl_init('http://localhost/test/test_timeout.php?foo=bar');
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_NOSIGNAL, 1);
    curl_setopt($ch, CURLOPT_TIMEOUT_MS, 200);
    $data = curl_exec($ch);
    $curl_errno = curl_errno($ch);
    $curl_error = curl_error($ch);
    curl_close($ch);

    if ($curl_errno > 0) {
        echo "cURL Error ($curl_errno): $curl_error\n";
    } else {
        echo "Data received: $data\n";
    }
} else {
    // Server
    sleep(10);
    echo "Done.";
}

From http://www.php.net/manual/en/function.curl-setopt.php#104597

JWT refresh token flow

Below are the steps to do revoke your JWT access token:

When you do log in, send 2 tokens (Access token, Refresh token) in response to the client.
The access token will have less expiry time and Refresh will have long expiry time.
The client (Front end) will store refresh token in his local storage and access token in cookies.
The client will use an access token for calling APIs. But when it expires, pick the refresh token from local storage and call auth server API to get the new token.
Your auth server will have an API exposed which will accept refresh token and checks for its validity and return a new access token.
Once the refresh token is expired, the User will be logged out.

Please let me know if you need more details, I can share the code (Java + Spring boot) as well.

For your questions:

Q1: It's another JWT with fewer claims put in with long expiry time.

Q2: It won't be in a database. The backend will not store anywhere. They will just decrypt the token with private/public key and validate it with its expiry time also.

Q3: Yes, Correct

Error inflating class android.support.design.widget.NavigationView

Make sure your drawables for the menu are in the correct folder, mine where put in drawablev21 hence this caused a nullpointer to the resource.

Fixed it buy moving my icons to drawables folder

iTerm 2: How to set keyboard shortcuts to jump to beginning/end of line?

The old fashion emacs bindings can still work in iterm2 and os x terminal:

Preferences -> Profiles -> Keys (sub tab in profiles)

Set Left/Right option <kbd>?</kbd> key acts as +Esc (similar in os x terminal)

This should enable alt-f and alt-b for moving words by words. (Still ctrl-a and ctrl-e always work as usual)

If set as meta those old bindings will work while some iterm2 bindings unavailable.

How do I use arrays in C++?

Arrays on the type level

An array type is denoted as T[n] where T is the element type and n is a positive size, the number of elements in the array. The array type is a product type of the element type and the size. If one or both of those ingredients differ, you get a distinct type:

#include <type_traits>

static_assert(!std::is_same<int[8], float[8]>::value, "distinct element type");
static_assert(!std::is_same<int[8],   int[9]>::value, "distinct size");

Note that the size is part of the type, that is, array types of different size are incompatible types that have absolutely nothing to do with each other. sizeof(T[n]) is equivalent to n * sizeof(T).

Array-to-pointer decay

The only "connection" between T[n] and T[m] is that both types can implicitly be converted to T*, and the result of this conversion is a pointer to the first element of the array. That is, anywhere a T* is required, you can provide a T[n], and the compiler will silently provide that pointer:

                  +---+---+---+---+---+---+---+---+
the_actual_array: |   |   |   |   |   |   |   |   |   int[8]
                  +---+---+---+---+---+---+---+---+
                    ^
                    |
                    |
                    |
                    |  pointer_to_the_first_element   int*

This conversion is known as "array-to-pointer decay", and it is a major source of confusion. The size of the array is lost in this process, since it is no longer part of the type (T*). Pro: Forgetting the size of an array on the type level allows a pointer to point to the first element of an array of any size. Con: Given a pointer to the first (or any other) element of an array, there is no way to detect how large that array is or where exactly the pointer points to relative to the bounds of the array. Pointers are extremely stupid.

Arrays are not pointers

The compiler will silently generate a pointer to the first element of an array whenever it is deemed useful, that is, whenever an operation would fail on an array but succeed on a pointer. This conversion from array to pointer is trivial, since the resulting pointer value is simply the address of the array. Note that the pointer is not stored as part of the array itself (or anywhere else in memory). An array is not a pointer.

static_assert(!std::is_same<int[8], int*>::value, "an array is not a pointer");

One important context in which an array does not decay into a pointer to its first element is when the & operator is applied to it. In that case, the & operator yields a pointer to the entire array, not just a pointer to its first element. Although in that case the values (the addresses) are the same, a pointer to the first element of an array and a pointer to the entire array are completely distinct types:

static_assert(!std::is_same<int*, int(*)[8]>::value, "distinct element type");

The following ASCII art explains this distinction:

      +-----------------------------------+
      | +---+---+---+---+---+---+---+---+ |
+---> | |   |   |   |   |   |   |   |   | | int[8]
|     | +---+---+---+---+---+---+---+---+ |
|     +---^-------------------------------+
|         |
|         |
|         |
|         |  pointer_to_the_first_element   int*
|
|  pointer_to_the_entire_array              int(*)[8]

Note how the pointer to the first element only points to a single integer (depicted as a small box), whereas the pointer to the entire array points to an array of 8 integers (depicted as a large box).

The same situation arises in classes and is maybe more obvious. A pointer to an object and a pointer to its first data member have the same value (the same address), yet they are completely distinct types.

If you are unfamiliar with the C declarator syntax, the parenthesis in the type int(*)[8] are essential:

int(*)[8] is a pointer to an array of 8 integers.
int*[8] is an array of 8 pointers, each element of type int*.

Accessing elements

C++ provides two syntactic variations to access individual elements of an array. Neither of them is superior to the other, and you should familiarize yourself with both.

Pointer arithmetic

Given a pointer p to the first element of an array, the expression p+i yields a pointer to the i-th element of the array. By dereferencing that pointer afterwards, one can access individual elements:

std::cout << *(x+3) << ", " << *(x+7) << std::endl;

If x denotes an array, then array-to-pointer decay will kick in, because adding an array and an integer is meaningless (there is no plus operation on arrays), but adding a pointer and an integer makes sense:

   +---+---+---+---+---+---+---+---+
x: |   |   |   |   |   |   |   |   |   int[8]
   +---+---+---+---+---+---+---+---+
     ^           ^               ^
     |           |               |
     |           |               |
     |           |               |
x+0  |      x+3  |          x+7  |     int*

(Note that the implicitly generated pointer has no name, so I wrote x+0 in order to identify it.)

If, on the other hand, x denotes a pointer to the first (or any other) element of an array, then array-to-pointer decay is not necessary, because the pointer on which i is going to be added already exists:

   +---+---+---+---+---+---+---+---+
   |   |   |   |   |   |   |   |   |   int[8]
   +---+---+---+---+---+---+---+---+
     ^           ^               ^
     |           |               |
     |           |               |
   +-|-+         |               |
x: | | |    x+3  |          x+7  |     int*
   +---+

Note that in the depicted case, x is a pointer variable (discernible by the small box next to x), but it could just as well be the result of a function returning a pointer (or any other expression of type T*).

Indexing operator

Since the syntax *(x+i) is a bit clumsy, C++ provides the alternative syntax x[i]:

std::cout << x[3] << ", " << x[7] << std::endl;

Due to the fact that addition is commutative, the following code does exactly the same:

std::cout << 3[x] << ", " << 7[x] << std::endl;

The definition of the indexing operator leads to the following interesting equivalence:

&x[i]  ==  &*(x+i)  ==  x+i

However, &x[0] is generally not equivalent to x. The former is a pointer, the latter an array. Only when the context triggers array-to-pointer decay can x and &x[0] be used interchangeably. For example:

T* p = &array[0];  // rewritten as &*(array+0), decay happens due to the addition
T* q = array;      // decay happens due to the assignment

On the first line, the compiler detects an assignment from a pointer to a pointer, which trivially succeeds. On the second line, it detects an assignment from an array to a pointer. Since this is meaningless (but pointer to pointer assignment makes sense), array-to-pointer decay kicks in as usual.

Ranges

An array of type T[n] has n elements, indexed from 0 to n-1; there is no element n. And yet, to support half-open ranges (where the beginning is inclusive and the end is exclusive), C++ allows the computation of a pointer to the (non-existent) n-th element, but it is illegal to dereference that pointer:

   +---+---+---+---+---+---+---+---+....
x: |   |   |   |   |   |   |   |   |   .   int[8]
   +---+---+---+---+---+---+---+---+....
     ^                               ^
     |                               |
     |                               |
     |                               |
x+0  |                          x+8  |     int*

For example, if you want to sort an array, both of the following would work equally well:

std::sort(x + 0, x + n);
std::sort(&x[0], &x[0] + n);

Note that it is illegal to provide &x[n] as the second argument since this is equivalent to &*(x+n), and the sub-expression *(x+n) technically invokes undefined behavior in C++ (but not in C99).

Also note that you could simply provide x as the first argument. That is a little too terse for my taste, and it also makes template argument deduction a bit harder for the compiler, because in that case the first argument is an array but the second argument is a pointer. (Again, array-to-pointer decay kicks in.)

jQuery: outer html()

No siblings solution:

var x = $('#xxx').parent().html();
alert(x);

Universal solution:

// no cloning necessary    
var x = $('#xxx').wrapAll('<div>').parent().html(); 
alert(x);

Fiddle here: http://jsfiddle.net/ezmilhouse/Mv76a/

Using logging in multiple modules

I always do it as below.

Use a single python file to config my log as singleton pattern which named 'log_conf.py'

#-*-coding:utf-8-*-

import logging.config

def singleton(cls):
    instances = {}
    def get_instance():
        if cls not in instances:
            instances[cls] = cls()
        return instances[cls]
    return get_instance()

@singleton
class Logger():
    def __init__(self):
        logging.config.fileConfig('logging.conf')
        self.logr = logging.getLogger('root')

In another module, just import the config.

from log_conf import Logger

Logger.logr.info("Hello World")

This is a singleton pattern to log, simply and efficiently.

How to call a SOAP web service on Android

Android does not provide any sort of SOAP library. You can either write your own, or use something like kSOAP 2. As you note, others have been able to compile and use kSOAP2 in their own projects, but I haven't had to.

Google has shown, to date, little interest in adding a SOAP library to Android. My suspicion for this is that they'd rather support the current trends in Web Services toward REST-based services, and using JSON as a data encapsulation format. Or, using XMPP for messaging. But that is just conjecture.

XML-based web services are a slightly non-trivial task on Android at this time. Not knowing NetBeans, I can't speak to the tools available there, but I agree that a better library should be available. It is possible that the XmlPullParser will save you from using SAX, but I don't know much about that.

PHP syntax question: What does the question mark and colon mean?

It's the ternary form of the if-else operator. The above statement basically reads like this:

if ($add_review) then {
    return FALSE; //$add_review evaluated as True
} else {
    return $arg //$add_review evaluated as False
}

See here for more details on ternary op in PHP: http://www.addedbytes.com/php/ternary-conditionals/

submit a form in a new tab

<form target="_blank" [....]

will submit the form in a new tab... I am not sure if is this what you are looking for, please explain better...

git switch branch without discarding local changes

Use git stash

git stash

It pushes changes to a stack. When you want to pull them back use

git stash apply

You can even pull individual items out. To completely blow away the stash:

git stash clear

What is the difference between DAO and Repository patterns?

The key difference is that a repository handles the access to the aggregate roots in a an aggregate, while DAO handles the access to entities. Therefore, it's common that a repository delegates the actual persistence of the aggregate roots to a DAO. Additionally, as the aggregate root must handle the access of the other entities, then it may need to delegate this access to other DAOs.

Android - how to replace part of a string by another string?

In kotlin there is no replaceAll, so I created this loop to replace repeated values ??in a string or any variable.

 var someValue = "https://www.google.com.br/"
    while (someValue.contains(".")) {
        someValue = someValue.replace(".", "")
    }
Log.d("newValue :", someValue)
// in that case the stitches have been removed
//https://wwwgooglecombr/

Twitter - share button, but with image

I used this code to solve this problem.

<a href="https://twitter.com/intent/tweet?url=myUrl&text=myTitle" target="_blank"><img src="path_to_my_image"/></a>

You can check the tweet-button documentation here tweet-button

Converting array to list in Java

Given Array:

    int[] givenArray = {2,2,3,3,4,5};

Converting integer array to Integer List

One way: boxed() -> returns the IntStream

    List<Integer> givenIntArray1 = Arrays.stream(givenArray)
                                  .boxed()
                                  .collect(Collectors.toList());

Second Way: map each element of the stream to Integer and then collect

NOTE: Using mapToObj you can covert each int element into string stream, char stream etc by casing i to (char)i

    List<Integer> givenIntArray2 = Arrays.stream(givenArray)
                                         .mapToObj(i->i)
                                         .collect(Collectors.toList());

Converting One array Type to Another Type Example:

List<Character> givenIntArray2 = Arrays.stream(givenArray)
                                             .mapToObj(i->(char)i)
                                             .collect(Collectors.toList());

Import CSV to SQLite

I am merging info from previous answers here with my own experience. The easiest is to add the comma-separated table headers directly to your csv file, followed by a new line, and then all your csv data.

If you are never doing sqlite stuff again (like me), this might save you a web search or two:

In the Sqlite shell enter:

$ sqlite3 yourfile.sqlite
sqlite>  .mode csv
sqlite>  .import test.csv yourtable
sqlite>  .exit

If you haven't got Sqlite installed on your Mac, run

$ brew install sqlite3

You may need to do one web search for how to install Homebrew.

Remove stubborn underline from link

Without seeing the page, hard to speculate.

But it sounds to me like you may have a border-bottom: 1px solid blue; being applied. Perhaps add border: none;. text-decoration: none !important is right, it's possible that you have another style that is still overriding that CSS though.

This is where using the Firefox Web Developer Toolbar is awesome, you can edit the CSS right there and see if things work, at least for Firefox. It's under CSS > Edit CSS.

Splitting a Java String by the pipe symbol using split("|")

You need

test.split("\\|");

split uses regular expression and in regex | is a metacharacter representing the OR operator. You need to escape that character using \ (written in String as "\\" since \ is also a metacharacter in String literals and require another \ to escape it).

You can also use

test.split(Pattern.quote("|"));

and let Pattern.quote create the escaped version of the regex representing |.

test if event handler is bound to an element in jQuery

I wrote a very tiny plugin called "once" which do that:

$.fn.once = function(a, b) {
    return this.each(function() {
        $(this).off(a).on(a,b);
    });
};

And simply:

$(element).once('click', function(){
});

How to check string length with JavaScript

That's the function I wrote to get string in Unicode characters:

function nbUnicodeLength(string){
    var stringIndex = 0;
    var unicodeIndex = 0;
    var length = string.length;
    var second;
    var first;
    while (stringIndex < length) {

        first = string.charCodeAt(stringIndex);  // returns an integer between 0 and 65535 representing the UTF-16 code unit at the given index.
        if (first >= 0xD800 && first <= 0xDBFF && string.length > stringIndex + 1) {
            second = string.charCodeAt(stringIndex + 1);
            if (second >= 0xDC00 && second <= 0xDFFF) {
                stringIndex += 2;
            } else {
                stringIndex += 1;
            }
        } else {
            stringIndex += 1;
        }

        unicodeIndex += 1;
    }
    return unicodeIndex;
}

Adding files to java classpath at runtime

Try this one on for size.

private static void addSoftwareLibrary(File file) throws Exception {
    Method method = URLClassLoader.class.getDeclaredMethod("addURL", new Class[]{URL.class});
    method.setAccessible(true);
    method.invoke(ClassLoader.getSystemClassLoader(), new Object[]{file.toURI().toURL()});
}

This edits the system class loader to include the given library jar. It is pretty ugly, but it works.

Can I exclude some concrete urls from <url-pattern> inside <filter-mapping>?

I have encounterd the same issue, but I find a anwser showing below.

web.xml

 <!-- set this param value for the filter-->
    <init-param>
            <param-name>freePages</param-name>
            <param-value>
            MainFrame.jsp;
            </param-value>
    </init-param>

filter.java

strFreePages = config.getInitParameter("freePages"); //get the exclue pattern from config file
isFreePage(strRequestPage)  //decide the exclude path

this way you don't have to harass the concrete Filter class.

How to normalize a 2-dimensional numpy array in python less verbose?

Here is one more possible way using reshape:

a_norm = (a/a.sum(axis=1).reshape(-1,1)).round(3)
print(a_norm)

Or using None works too:

a_norm = (a/a.sum(axis=1)[:,None]).round(3)
print(a_norm)

Output:

array([[0.   , 0.333, 0.667],
       [0.25 , 0.333, 0.417],
       [0.286, 0.333, 0.381]])

Finding square root without using sqrt function?

Why not try to use the Babylonian method for finding a square root.

Here is my code for it:

double sqrt(double number)
{
    double error = 0.00001; //define the precision of your result
    double s = number;

    while ((s - number / s) > error) //loop until precision satisfied 
    {
        s = (s + number / s) / 2;
    }
    return s;
}

Good luck!

MySQL Query - Records between Today and Last 30 Days

For the current date activity and complete activity for previous 30 days use this, since the SYSDATE is variable in a day the previous 30th day will not have the whole data for that day.

SELECT  DATE_FORMAT(create_date, '%m/%d/%Y')
FROM mytable
WHERE create_date BETWEEN CURDATE() - INTERVAL 30 DAY AND SYSDATE()

HTML form with multiple "actions"

the best way (for me) to make it it's the next infrastructure:

<form method="POST">
<input type="submit" formaction="default_url_when_press_enter" style="visibility: hidden; display: none;">
<!-- all your inputs -->
<input><input><input>
<!-- all your inputs -->
<button formaction="action1">Action1</button>
<button formaction="action2">Action2</button>
<input type="submit" value="Default Action">
</form>

with this structure you will send with enter a direction and the infinite possibilities for the rest of buttons.

Programs & Examples On #Sbt

How to use sbt from behind proxy?

How to check sbt version?

Install sbt on ubuntu

ScalaTest in sbt: is there a way to run a single test without tags?

HTML5 File API read as text and binary

Setting state on componentDidMount()

unary operator expected in shell script when comparing null value with string

Deny all, allow only one IP through htaccess

Fragment onCreateView and onActivityCreated called twice

Clearing content of text file using php

How to create a file in Ruby

Getting "type or namespace name could not be found" but everything seems ok?

How to change icon on Google map marker

Send mail via Gmail with PowerShell V2's Send-MailMessage

Installing TensorFlow on Windows (Python 3.6.x)

Fixing a systemd service 203/EXEC failure (no such file or directory)

PDO closing connection

Send email using the GMail SMTP server from a PHP page

Is it possible to modify a string of char in C?

How do I display a decimal value to 2 decimal places?

How to make a drop down list in yii2?

can you host a private repository for your organization to use with npm?

VBA Runtime Error 1004 "Application-defined or Object-defined error" when Selecting Range

Put byte array to JSON and vice versa

How to get row count in sqlite using Android?

How do I convert an ANSI encoded file to UTF-8 with Notepad++?

Using a PagedList with a ViewModel ASP.Net MVC

Bonus

Adding attributes to an XML node

What is $@ in Bash?

Is there an "exists" function for jQuery?

Are there any style options for the HTML5 Date picker?

Response to preflight request doesn't pass access control check

Stop fixed position at footer

MYSQL Sum Query with IF Condition

What is the difference between And and AndAlso in VB.NET?

jquery stop child triggering parent event

How to install numpy on windows using pip install?

HTML 5 input type="number" element for floating point numbers on Chrome

How to delete and recreate from scratch an existing EF Code First database

Create folder with batch but only if it doesn't already exist

How to initialize/instantiate a custom UIView class with a XIB file in Swift

How to replace a string in a SQL Server Table Column

"cannot resolve symbol R" in Android Studio

Sorting objects by property values

Createuser: could not connect to database postgres: FATAL: role "tom" does not exist

Pandas: Return Hour from Datetime Column Directly

Nexus 7 not visible over USB via "adb devices" from Windows 7 x64

insert data into database using servlet and jsp in eclipse

How to allow only one radio button to be checked?

How do I install Python OpenCV through Conda?

Can I get div's background-image url?

Getting the value of an attribute in XML

Simple UDP example to send and receive data from same socket

Why is `input` in Python 3 throwing NameError: name... is not defined

'str' object does not support item assignment in Python

How do I pretty-print existing JSON data with Java?

How to check postgres user and password?

Can Selenium interact with an existing browser session?

Git merge error "commit is not possible because you have unmerged files"

How to get html table td cell value by JavaScript?

How to search for a file in the CentOS command line

Can you require two form fields to match with HTML5?

What is the proper declaration of main in C++?

How to grant all privileges to root user in MySQL 8.0

How to create a <style> tag with Javascript?

Native DOM:

jQuery:

High CPU Utilization in java application - why?

Freeze screen in chrome debugger / DevTools panel for popover inspection?

SQL SELECT everything after a certain character

django - get() returned more than one topic

How to get the current taxonomy term ID (not the slug) in WordPress?

Print Combining Strings and Numbers

Get day of week in SQL Server 2005/2008

How to enable mod_rewrite for Apache 2.2

Get a random item from a JavaScript array

Apply CSS rules to a nested class inside a div

Tracking Google Analytics Page Views with AngularJS