Difference between acceptance test and functional test?

Acceptance testing is just testing carried out by the client, and includes other kinds of testing:

Functional testing: "this button doesn't work"
Non-functional testing: "this page works but is too slow"

For functional testing vs non-functional testing (their subtypes) - see my answer to this SO question.

How do I change db schema to dbo

You can batch change schemas of multiple database objects as described in this post:

How to change schema of all tables, views and stored procedures in MSSQL

How to redraw DataTable with new data

Another alternative is

dtColumns[index].visible = false/true;

To show or hide any column.

jQuery.animate() with css class only, without explicit styles

In many cases you're better off using CSS transitions for this, and in old browsers the easing will simply be instant. Most animations (like fade in/out) are very trivial to implement and the browser does all the legwork for you. https://developer.mozilla.org/en/docs/Web/CSS/transition

Convert Linq Query Result to Dictionary

Try using the ToDictionary method like so:

var dict = TableObj.ToDictionary( t => t.Key, t => t.TimeStamp );

How do I get values from a SQL database into textboxes using C#?

If you want to display single value access from database into textbox, please refer to the code below:

SqlConnection con=new SqlConnection("connection string");
SqlCommand cmd=new SqlConnection(SqlQuery,Con);
Con.Open();
TextBox1.Text=cmd.ExecuteScalar();
Con.Close();

SqlConnection con=new SqlConnection("connection string");
SqlCommand cmd=new SqlConnection(SqlQuery,Con);
Con.Open();
SqlDataReader dr=new SqlDataReadr();
dr=cmd.Executereader();
if(dr.read())
{
    TextBox1.Text=dr.GetValue(0).Tostring();
}
Con.Close();

Rollback one specific migration in Laravel

better to used refresh migrate

You may rollback & re-migrate a limited number of migrations by providing the step option to the refresh command. For example, the following command will rollback & re-migrate the last two migrations:

php artisan migrate:refresh --step=2

otherwise used rollback migrate

You may rollback a limited number of migrations by providing the step option to the rollback command. For example, the following command will rollback the last three migrations:

php artisan migrate:rollback --step=3

for more detail about migration see

Can't operator == be applied to generic types in C#?

In general, EqualityComparer<T>.Default.Equals should do the job with anything that implements IEquatable<T>, or that has a sensible Equals implementation.

If, however, == and Equals are implemented differently for some reason, then my work on generic operators should be useful; it supports the operator versions of (among others):

Equal(T value1, T value2)
NotEqual(T value1, T value2)
GreaterThan(T value1, T value2)
LessThan(T value1, T value2)
GreaterThanOrEqual(T value1, T value2)
LessThanOrEqual(T value1, T value2)

Responsive dropdown navbar with angular-ui bootstrap (done in the correct angular kind of way)

My solotion for responsive/dropdown navbar with angular-ui bootstrap (when update to angular 1.5 and, ui-bootrap 1.2.1)
index.html

     ...    
    <link rel="stylesheet" href="/css/app.css">
</head>
<body>


<nav class="navbar navbar-inverse navbar-fixed-top">
        <div class="container">
            <input type="checkbox" id="navbar-toggle-cbox">
            <div class="navbar-header">
                <label for="navbar-toggle-cbox" class="navbar-toggle" 
                       ng-init="navCollapsed = true" 
                       ng-click="navCollapsed = !navCollapsed"  
                       aria-controls="navbar">
                    <span class="sr-only">Toggle navigation</span>
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                </label>
                <a class="navbar-brand" href="#">Project name</a>
                 <div id="navbar" class="collapse navbar-collapse"  ng-class="{'in':!navCollapsed}">
                    <ul class="nav navbar-nav">
                        <li class="active"><a href="/view1">Home</a></li>
                        <li><a href="/view2">About</a></li>
                        <li><a href="#">Contact</a></li>
                        <li uib-dropdown>
                            <a href="#" uib-dropdown-toggle>Dropdown <b class="caret"></b></a>
                            <ul uib-dropdown-menu role="menu" aria-labelledby="split-button">
                                <li role="menuitem"><a href="#">Action</a></li>
                                <li role="menuitem"><a href="#">Another action</a></li>                                   
                            </ul>
                        </li>

                    </ul>
                 </div>
            </div>
        </div>
    </nav>

app.css

/* show the collapse when navbar toggle is checked */
#navbar-toggle-cbox:checked ~ .collapse {
    display: block;
}

/* the checkbox used only internally; don't display it */
#navbar-toggle-cbox {
  display:none
}

CSS @font-face not working in ie

You could use the Google Font API. They say it works from IE 6 and up. (I've not tested this.)

Google’s serving infrastructure takes care of converting the font into a format compatible with any modern browser (including Internet Explorer 6 and up), ...

How to get my activity context?

If you need the context of A in B, you need to pass it to B, and you can do that by passing the Activity A as parameter as others suggested. I do not see much the problem of having the many instances of A having their own pointers to B, not sure if that would even be that much of an overhead.

But if that is the problem, a possibility is to keep the pointer to A as a sort of global, avariable of the Application class, as @hasanghaforian suggested. In fact, depending on what do you need the context for, you could even use the context of the Application instead.

I'd suggest reading this article about context to better figure it out what context you need.

Saving data to a file in C#

Here is a simple example similar to Sachin's. It's recommended to use a "using" statement on the unmanaged file resource:

        // using System.IO;
        string filepath = @"C:\test.txt";
        using (StreamWriter writer = new StreamWriter(filepath))
        {
            writer.WriteLine("some text");
        }

using Statement (C# Reference)

Should ol/ul be inside <p> or outside?

The second. The first is invalid.

A paragraph cannot contain a list.
A list cannot contain a paragraph unless that paragraph is contained entirely within a single list item.

A browser will handle it like so:

<p>tetxtextextete 
<!-- Start of paragraph -->
<ol>
<!-- Start of ordered list. Paragraphs cannot contain lists. Insert </p> -->
<li>first element</li></ol>
<!-- A list item element. End of list -->
</p>
<!-- End of paragraph, but not inside paragraph, discard this tag to recover from the error -->
<p>other textetxet</p>
<!-- Another paragraph -->

How do I select between the 1st day of the current month and current day in MySQL?

select * from <table>
where <dateValue> between last_day(curdate() - interval 1 month + interval 1 day)
                  and curdate();

Get human readable version of file size?

What you're about to find below is by no means the most performant or shortest solution among the ones already posted. Instead, it focuses on one particular issue that many of the other answers miss.

Namely the case when input like 999_995 is given:

Python 3.6.1 ...
...
>>> value = 999_995
>>> base = 1000
>>> math.log(value, base)
1.999999276174054

which, being truncated to the nearest integer and applied back to the input gives

>>> order = int(math.log(value, base))
>>> value/base**order
999.995

This seems to be exactly what we'd expect until we're required to control output precision. And this is when things start to get a bit difficult.

With the precision set to 2 digits we get:

>>> round(value/base**order, 2)
1000 # K

instead of 1M.

How can we counter that?

Of course, we can check for it explicitly:

if round(value/base**order, 2) == base:
    order += 1

But can we do better? Can we get to know which way the order should be cut before we do the final step?

It turns out we can.

Assuming 0.5 decimal rounding rule, the above if condition translates into:

resulting in

def abbreviate(value, base=1000, precision=2, suffixes=None):
    if suffixes is None:
        suffixes = ['', 'K', 'M', 'B', 'T']

    if value == 0:
        return f'{0}{suffixes[0]}'

    order_max = len(suffixes) - 1
    order = log(abs(value), base)
    order_corr = order - int(order) >= log(base - 0.5/10**precision, base)
    order = min(int(order) + order_corr, order_max)

    factored = round(value/base**order, precision)

    return f'{factored:,g}{suffixes[order]}'

giving

>>> abbreviate(999_994)
'999.99K'
>>> abbreviate(999_995)
'1M'
>>> abbreviate(999_995, precision=3)
'999.995K'
>>> abbreviate(2042, base=1024)
'1.99K'
>>> abbreviate(2043, base=1024)
'2K'

Simplest way to have a configuration file in a Windows Forms C# application

You should create an App.config file (very similar to web.config).

You should right click on your project, add new item, and choose new "Application Configuration File".

Ensure that you add using System.Configuration in your project.

Then you can add values to it:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <appSettings>
    <add key="setting1" value="key"/>
  </appSettings>
  <connectionStrings>
    <add name="prod" connectionString="YourConnectionString"/>
  </connectionStrings>
</configuration>

    private void Form1_Load(object sender, EventArgs e)
    {
        string setting = ConfigurationManager.AppSettings["setting1"];
        string conn = ConfigurationManager.ConnectionStrings["prod"].ConnectionString;
    }

Just a note: According to Microsoft, you should use ConfigurationManager instead of ConfigurationSettings (see the remarks section):

"The ConfigurationSettings class provides backward compatibility only. For new applications you should use the ConfigurationManager class or WebConfigurationManager class instead. "

How to write a test which expects an Error to be thrown in Jasmine?

In my case the function throwing error was async so I followed here:

await expectAsync(asyncFunction()).toBeRejected();
await expectAsync(asyncFunction()).toBeRejectedWithError(...);

Using the Jersey client to do a POST operation

If you need to do a file upload, you'll need to use MediaType.MULTIPART_FORM_DATA_TYPE. Looks like MultivaluedMap cannot be used with that so here's a solution with FormDataMultiPart.

InputStream stream = getClass().getClassLoader().getResourceAsStream(fileNameToUpload);

FormDataMultiPart part = new FormDataMultiPart();
part.field("String_key", "String_value");
part.field("fileToUpload", stream, MediaType.TEXT_PLAIN_TYPE);
String response = WebResource.type(MediaType.MULTIPART_FORM_DATA_TYPE).post(String.class, part);

m2e error in MavenArchiver.getManifest()

I had exactly the same problem. My environment was:

Spring STS 3.7.3.RELEASE
Build Id: 201602250940
Platform: Eclipse Mars.2 (4.5.2)

The symptoms of the problems were:

There was a red error flag on my PM file. and the description of the error was as described in the original question asked here.
There were known compilation problems in the several Java files in the project, but eclipse still was not showing them flagged as error in the editor pane as well as the project explorer tree on the left side.

The solution (described above) about updating the m2e extensions worked for me.

Better solution (my recommondation):

update Eclipse m2e extensions
From Help > Install New Software.., add a new repository (via the Add.. option), pointing to the following URL: https://otto.takari.io/content/sites/m2e.extras/m2eclipse-mavenarchiver/0.17.2/N/LATEST/
Select the m2e extensions, accept the license.
After update, you will be asked for restarting STS. The problem goes away after STS comes back up.

What is the correct "-moz-appearance" value to hide dropdown arrow of a <select> element

it is working when adding :

select { width:115% }

Create URL from a String

URL url = new URL(yourUrl, "/api/v1/status.xml");

According to the javadocs this constructor just appends whatever resource to the end of your domain, so you would want to create 2 urls:

URL domain = new URL("http://example.com");
URL url = new URL(domain + "/files/resource.xml");

Sources: http://docs.oracle.com/javase/6/docs/api/java/net/URL.html

How to Select Min and Max date values in Linq Query

If you are looking for the oldest date (minimum value), you'd sort and then take the first item returned. Sorry for the C#:

var min = myData.OrderBy( cv => cv.Date1 ).First();

The above will return the entire object. If you just want the date returned:

var min = myData.Min( cv => cv.Date1 );

Regarding which direction to go, re: Linq to Sql vs Linq to Entities, there really isn't much choice these days. Linq to Sql is no longer being developed; Linq to Entities (Entity Framework) is the recommended path by Microsoft these days.

From Microsoft Entity Framework 4 in Action (MEAP release) by Manning Press:

What about the future of LINQ to SQL?

It's not a secret that LINQ to SQL is included in the Framework 4.0 for compatibility reasons. Microsoft has clearly stated that Entity Framework is the recommended technology for data access. In the future it will be strongly improved and tightly integrated with other technologies while LINQ to SQL will only be maintained and little evolved.

What should I use to open a url instead of urlopen in urllib3

You do not have to install urllib3. You can choose any HTTP-request-making library that fits your needs and feed the response to BeautifulSoup. The choice is though usually requests because of the rich feature set and convenient API. You can install requests by entering pip install requests in the command line. Here is a basic example:

from bs4 import BeautifulSoup
import requests

url = "url"
response = requests.get(url)

soup = BeautifulSoup(response.content, "html.parser")

Disabling contextual LOB creation as createClob() method threw error

Update to this for using Hibernate 4.3.x / 5.0.x - you could just set this property to true:

<prop key="hibernate.jdbc.lob.non_contextual_creation">true</prop>

to get rid of that error message. Same effect but without the "threw exception" detail. See LobCreatorBuilder source for details.

Filter values only if not null using lambda in Java8

You can do this in single filter step:

requiredCars = cars.stream().filter(c -> c.getName() != null && c.getName().startsWith("M"));

If you don't want to call getName() several times (for example, it's expensive call), you can do this:

requiredCars = cars.stream().filter(c -> {
    String name = c.getName();
    return name != null && name.startsWith("M");
});

Or in more sophisticated way:

requiredCars = cars.stream().filter(c -> 
    Optional.ofNullable(c.getName()).filter(name -> name.startsWith("M")).isPresent());

Manually highlight selected text in Notepad++

To highlight a block of code in Notepad++, please do the following steps

Select the required text.
Right click to display the context menu
Choose Style token and select any of the five choices available ( styles from Using 1st style to using 5th style). Each is of different colors.If you want yellow color choose using 3rd style.

If you want to create your own style you can use Style Configurator under Settings menu.

Android Starting Service at Boot Time , How to restart service class after device Reboot?

Your receiver:

public class MyReceiver extends BroadcastReceiver {   

    @Override
    public void onReceive(Context context, Intent intent) {

     Intent myIntent = new Intent(context, YourService.class);
     context.startService(myIntent);

    }
}

Your AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.broadcast.receiver.example"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name" android:debuggable="true">

        <activity android:name=".BR_Example"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    <!-- Declaring broadcast receiver for BOOT_COMPLETED event. -->
        <receiver android:name=".MyReceiver" android:enabled="true" android:exported="false">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED"/>
            </intent-filter>
        </receiver>

    </application>

    <!-- Adding the permission -->
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

</manifest>

Compare two date formats in javascript/jquery

try with new Date(obj).getTime()

if( new Date(fit_start_time).getTime() > new Date(fit_end_time).getTime() )
{
    alert(fit_start_time + " is greater."); // your code
}
else if( new Date(fit_start_time).getTime() < new Date(fit_end_time).getTime() )
{
    alert(fit_end_time + " is greater."); // your code
}
else
{
    alert("both are same!"); // your code
}

Count the cells with same color in google spreadsheet

You can use this working script:

/**
* @param {range} countRange Range to be evaluated
* @param {range} colorRef Cell with background color to be searched for in countRange
* @return {number}
* @customfunction
*/

function countColoredCells(countRange,colorRef) {
  var activeRange = SpreadsheetApp.getActiveRange();
  var activeSheet = activeRange.getSheet();
  var formula = activeRange.getFormula();

  var rangeA1Notation = formula.match(/\((.*)\,/).pop();
  var range = activeSheet.getRange(rangeA1Notation);
  var bg = range.getBackgrounds();
  var values = range.getValues();

  var colorCellA1Notation = formula.match(/\,(.*)\)/).pop();
  var colorCell = activeSheet.getRange(colorCellA1Notation);
  var color = colorCell.getBackground();

  var count = 0;

  for(var i=0;i<bg.length;i++)
    for(var j=0;j<bg[0].length;j++)
      if( bg[i][j] == color )
        count=count+1;
  return count;
};

Then call this function in your google sheets:

=countColoredCells(D5:D123,Z11)

How to convert char* to wchar_t*?

I did something like this. The first 2 zeros are because I don't know what kind of ascii type things this command wants from me. The general feeling I had was to create a temp char array. pass in the wide char array. boom. it works. The +1 ensures that the null terminating character is in the right place.

char tempFilePath[MAX_PATH] = "I want to convert this to wide chars";

int len = strlen(tempFilePath);

// Converts the path to wide characters
    int needed = MultiByteToWideChar(0, 0, tempFilePath, len + 1, strDestPath, len + 1);

How do I create a Bash alias?

If you put blah="/usr/bin/blah" in your ~/.bashrc then you can use $blah in your login shell as a substitute for typing /usr/bin/blah

Javascript: Easier way to format numbers?

Just finished up a js library for formatting numbers Numeral.js. It handles decimals, dollars, percentages and even time formatting.

Does React Native styles support gradients?

Looking for a similar solution I just came across this brand new tutorial, which lets you bridge a Swift gradient background (https://github.com/soffes/GradientView) library while walking through every step to get a working React component.

It is a step-by-step tutorial, allowing you to build your own component by bridging the swift and objective-c component into a usable React Native component, which overrides the standard View component and allows you to define a gradient like the following:

 <LinearGradient 
   style={styles.gradient} 
   locations={[0, 1.0]} 
   colors={['#5ED2A0', '#339CB1']}
 />

You can find the tutorial here: http://browniefed.com/blog/2015/11/28/react-native-how-to-bridge-a-swift-view/

How to show full column content in a Spark Dataframe?

results.show(20,false) did the trick for me in Scala.

history.replaceState() example?

Indeed this is a bug, although intentional for 2 years now. The problem lies with some unclear specs and the complexity when document.title and back/forward are involved.

See bug reference on Webkit and Mozilla. Also Opera on the introduction of History API said it wasn't using the title parameter and probably still doesn't.

Currently the 2nd argument of pushState and replaceState — the title of the history entry — isn't used in Opera's implementation, but may be one day.

Potential solution

The only way I see is to alter the title element and use pushState instead:

document.getElementsByTagName('title')[0].innerHTML = 'bar';
window.history.pushState( {} , 'bar', '/bar' );

MySQL Workbench Edit Table Data is read only

Uncheck the marked check, it will enable the grid edit

Difference between IISRESET and IIS Stop-Start command

Take IISReset as a suite of commands that helps you manage IIS start / stop etc.

Which means you need to specify option (/switch) what you want to do to carry any operation.

Default behavior OR default switch is /restart with iisreset so you do not need to run command twice with /start and /stop.

Hope this clarifies your question. For reference the output of iisreset /? is:

IISRESET.EXE (c) Microsoft Corp. 1998-2005

Usage:
iisreset [computername]

    /RESTART            Stop and then restart all Internet services.
    /START              Start all Internet services.
    /STOP               Stop all Internet services.
    /REBOOT             Reboot the computer.
    /REBOOTONERROR      Reboot the computer if an error occurs when starting,
                        stopping, or restarting Internet services.
    /NOFORCE            Do not forcefully terminate Internet services if
                        attempting to stop them gracefully fails.
    /TIMEOUT:val        Specify the timeout value ( in seconds ) to wait for
                        a successful stop of Internet services. On expiration
                        of this timeout the computer can be rebooted if
                        the /REBOOTONERROR parameter is specified.
                        The default value is 20s for restart, 60s for stop,
                        and 0s for reboot.
    /STATUS             Display the status of all Internet services.
    /ENABLE             Enable restarting of Internet Services
                        on the local system.
    /DISABLE            Disable restarting of Internet Services
                        on the local system.

How can I convert a .jar to an .exe?

If your program is "publicly available non-commercial in nature" and has "a publicly available Web site that meets the basic quality standards", then you can try and get a free license of Excelsior. If its not then it's expensive, but still a viable option.

Program: https://www.excelsiorjet.com

As a side note: Here's a study of all existing Jar to EXE programs, which is a bit depressing - https://www.excelsior-usa.com/articles/java-to-exe.html

powershell - extract file name and extension

As of PowerShell 6.0, Split-Path has an -Extenstion parameter. This means you can do:

$path | Split-Path -Extension

Split-Path -Path $path -Extension

For $path = "test.txt" both versions will return .txt, inluding the full stop.

Replace non-numeric with empty string

try this

public static string cleanPhone(string inVal)
        {
            char[] newPhon = new char[inVal.Length];
            int i = 0;
            foreach (char c in inVal)
                if (c.CompareTo('0') > 0 && c.CompareTo('9') < 0)
                    newPhon[i++] = c;
            return newPhon.ToString();
        }

Checking if a folder exists using a .bat file

For a file:

if exist yourfilename (
  echo Yes 
) else (
  echo No
)

Replace yourfilename with the name of your file.

For a directory:

if exist yourfoldername\ (
  echo Yes 
) else (
  echo No
)

Replace yourfoldername with the name of your folder.

A trailing backslash (\) seems to be enough to distinguish between directories and ordinary files.

Remove portion of a string after a certain character

preg_replace offers one way:

$newText = preg_replace('/\bBy.*$/', '', $text);

Check if string matches pattern

  
import re

ab = re.compile("^([A-Z]{1}[0-9]{1})+$")
ab.match(string)

I believe that should work for an uppercase, number pattern.

Find a commit on GitHub given the commit hash

A URL of the form https://github.com/<owner>/<project>/commit/<hash> will show you the changes introduced in that commit. For example here's a recent bugfix I made to one of my projects on GitHub:

https://github.com/jerith666/git-graph/commit/35e32b6a00dec02ae7d7c45c6b7106779a124685

You can also shorten the hash to any unique prefix, like so:

https://github.com/jerith666/git-graph/commit/35e32b

I know you just asked about GitHub, but for completeness: If you have the repository checked out, from the command line, you can achieve basically the same thing with either of these commands (unique prefixes work here too):

git show 35e32b6a00dec02ae7d7c45c6b7106779a124685
git log -p -1 35e32b6a00dec02ae7d7c45c6b7106779a124685

Note: If you shorten the commit hash too far, the command line gives you a helpful disambiguation message, but GitHub will just return a 404.

how do I strip white space when grabbing text with jQuery?

str=str.replace(/^\s+|\s+$/g,'');

Remove stubborn underline from link

You missed text-decoration:none for the anchor tag. So code should be following.

_x000D_

.boxhead a {_x000D_
    text-decoration: none;_x000D_
}

_x000D_

<div class="boxhead">_x000D_
    <h2>_x000D_
        <span class="thisPage">Current Page</span>_x000D_
        <a href="myLink"><span class="otherPage">Different Page</span></a>_x000D_
    </h2>_x000D_
</div>

_x000D_

More standard properties for text-decoration

PHP header redirect 301 - what are the implications?

Search engines like 301 redirects better than a 404 or some other type of client side redirect, no worries there.

CPU usage will be minimal, if you want to save even more cycles you could try and handle the redirect in apache using htaccess, then php won't even have to get involved. If you want to load test a server, you can use ab which comes with apache, or httperf if you are looking for a more robust testing tool.

Fastest JavaScript summation

Or you could do it the evil way.

var a = [1,2,3,4,5,6,7,8,9];

sum = eval(a.join("+"));

;)

How to search by key=>value in a multidimensional array in PHP

http://snipplr.com/view/51108/nested-array-search-by-value-or-key/

<?php

//PHP 5.3

function searchNestedArray(array $array, $search, $mode = 'value') {

    foreach (new RecursiveIteratorIterator(new RecursiveArrayIterator($array)) as $key => $value) {
        if ($search === ${${"mode"}})
            return true;
    }
    return false;
}

$data = array(
    array('abc', 'ddd'),
    'ccc',
    'bbb',
    array('aaa', array('yyy', 'mp' => 555))
);

var_dump(searchNestedArray($data, 555));

Jquery function return value

I'm not entirely sure of the general purpose of the function, but you could always do this:

function getMachine(color, qty) {
    var retval;
    $("#getMachine li").each(function() {
        var thisArray = $(this).text().split("~");
        if(thisArray[0] == color&& qty>= parseInt(thisArray[1]) && qty<= parseInt(thisArray[2])) {
            retval = thisArray[3];
            return false;
        }
    });
    return retval;
}

var retval = getMachine(color, qty);

How to run TestNG from command line

You need to have the testng.jar under classpath.

try C:\projectfred> java -cp "path-tojar/testng.jar:path_to_yourtest_classes" org.testng.TestNG testng.xml

Update:

Under linux I ran this command and it would be some thing similar on Windows either

test/bin# java -cp ".:../lib/*" org.testng.TestNG testng.xml

Directory structure:

/bin - All my test packages are under bin including testng.xml
/src - All source files are under src
/lib - All libraries required for the execution of tests are under this.

Once I compile all sources they go under bin directory. So, in the classpath I need to specify contents of bin directory and all the libraries like testng.xml, loggers etc over here. Also copy testng.xml to bin folder if you dont want to specify the full path where the testng.xml is available.

 /bin
    -- testng.xml
    -- testclasses
    -- Properties files if any.
 /lib
    -- testng.jar
    -- log4j.jar

Update:

Go to the folder MyProject and type run the java command like the way shown below:-

java -cp ".: C:\Program Files\jbdevstudio4\studio\plugins\*" org.testng.TestNG testng.xml

I believe the testng.xml file is under C:\Users\me\workspace\MyProject if not please give the full path for testng.xml file

How to delete zero components in a vector in Matlab?

I just came across this problem and wanted to find something about the performance, but I couldn't, so I wrote a benchmarking script on my own:

% Config:
rows = 1e6;
runs = 50;

% Start:
orig = round(rand(rows, 1));

t1 = 0;
for i = 1:runs
    A = orig;
    tic
    A(A == 0) = [];
    t1 = t1 + toc;
end
t1 = t1 / runs;

t2 = 0;
for i = 1:runs
    A = orig;
    tic
    A = A(A ~= 0);
    t2 = t2 + toc;
end
t2 = t2 / runs;

t1
t2
t1 / t2

So you see, the solution using A = A(A ~= 0) is the quicker of the two :)

How to get a unique computer identifier in Java (like disk ID or motherboard ID)?

The usage of MAC id is most easier way if the task is about logging the unique id a system.

the change of mac id is though possible, even the change of other ids of a system are also possible is that respective device is replaced.

so, unless what for a unique id is required is not known, we may not be able to find an appropriate solution.

However, the below link is helpful extracting mac addresses. http://www.stratos.me/2008/07/find-mac-address-using-java/

Android - R cannot be resolved to a variable

Agree it is probably due to a problem in resources that is preventing build of R.Java in gen. In my case a cut n paste had given a duplicate app name in string. Sort the fault, delete gen directory and clean.

List file names based on a filename pattern and file content?

find /folder -type f -mtime -90 | grep -E "(.txt|.php|.inc|.root|.gif)" | xargs ls -l > WWWlastActivity.log

How to get distinct values from an array of objects in JavaScript?

underscore.js _.uniq(_.pluck(array,"age"))

TypeScript - Append HTML to container element in Angular 2

You could do something like this:

htmlComponent.ts

htmlVariable: string = "<b>Some html.</b>"; //this is html in TypeScript code that you need to display

htmlComponent.html

<div [innerHtml]="htmlVariable"></div> //this is how you display html code from TypeScript in your html

How to append to a file in Node?

If you want an easy and stress-free way to write logs line by line in a file, then I recommend fs-extra:

const os = require('os');
const fs = require('fs-extra');

const file = 'logfile.txt';
const options = {flag: 'a'};

async function writeToFile(text) {
  await fs.outputFile(file, `${text}${os.EOL}`, options);
}

writeToFile('First line');
writeToFile('Second line');
writeToFile('Third line');
writeToFile('Fourth line');
writeToFile('Fifth line');

Tested with Node v8.9.4.

How to make a view with rounded corners?

Use shape in xml with rectangle.set the property of bottom or upper radius as want.then apply that xml as background to ur view....or...use gradients to do it from code.

Force sidebar height 100% using CSS (with a sticky bottom image)?

I have run into this issue several times on different projects, but I have found a solution that works for me. You have to use four div tags - one that contains the sidebar, the main content, and a footer.

First, style the elements in your stylesheet:

#container {
width: 100%;
background: #FFFAF0;
}

.content {
width: 950px;
float: right;
padding: 10px;
height: 100%;
background: #FFFAF0;
}

.sidebar {
width: 220px;
float: left;
height: 100%;
padding: 5px;
background: #FFFAF0;
}

#footer {
clear:both;
background:#FFFAF0;
}

You can edit the different elements however you want to, just be sure you dont change the footer property "clear:both" - this is very important to leave in.

Then, simply set up your web page like this:

<div id=”container”>
<div class=”sidebar”></div>
<div class=”content”></div>
<div id=”footer”></div>
</div>

I wrote a more in-depth blog post about this at http://blog.thelibzter.com/how-to-make-a-sidebar-extend-the-entire-height-of-its-container. Please let me know if you have any questions. Hope this helps!

how do you view macro code in access?

EDIT: Per Michael Dillon's answer, SaveAsText does save the commands in a macro without having to go through converting to VBA. I don't know what happened when I tested that, but it didn't produce useful text in the resulting file.

So, I learned something new today!

ORIGINAL POST: To expand the question, I wondered if there was a way to retrieve the contents of a macro from code, and it doesn't appear that there is (at least not in A2003, which is what I'm running).

There are two collections through which you can access stored Macros:

  CurrentDB.Containers("Scripts").Documents
  CurrentProject.AllMacros

The properties that Intellisense identifies for the two collections are rather different, because the collections are of different types. The first (i.e., traditional, pre-A2000 way) is via a documents collection, and the methods/properties/members of all documents are the same, i.e., not specific to Macros.

Likewise, the All... collections of CurrentProject return collections where the individual items are of type Access Object. The result is that Intellisense gives you methods/properties/members that may not exist for the particular document/object.

So far as I can tell, there is no way to programatically retrieve the contents of a macro.

This would stand to reason, as macros aren't of much use to anyone who would have the capability of writing code to examine them programatically.

But if you just want to evaluate what the macros do, one alternative would be to convert them to VBA, which can be done programmatically thus:

  Dim varItem As Variant
  Dim strMacroName As String

  For Each varItem In CurrentProject.AllMacros
    strMacroName = varItem.Name
    'Debug.Print strMacroName
    DoCmd.SelectObject acMacro, strMacroName, True
    DoCmd.RunCommand acCmdConvertMacrosToVisualBasic
    Application.SaveAsText acModule, "Converted Macro- " & strMacroName, _
      CurrentProject.Path & "\" & "Converted Macro- " & strMacroName & ".txt"
  Next varItem

Then you could use the resulting text files for whatever you needed to do.

Note that this has to be run interactively in Access because it uses DoCmd.RunCommand, and you have to click OK for each macro -- tedious for databases with lots of macros, but not too onerous for a normal app, which shouldn't have more than a handful of macros.

Centering a Twitter Bootstrap button

If you have more than one button, then you can do the following.

<div class="center-block" style="max-width:400px">
  <a href="#" class="btn btn-success">Accept</a>
  <a href="#" class="btn btn-danger"> Reject</a>
</div>

Handling the TAB character in Java

You can also use the tab character '\t' to represent a tab, instead of "\t".

char c ='t';
char c =(char)9;

make sounds (beep) with c++

Here's one way:

cout << '\a';

From C++ Character Constants:

Alert: \a

NSInternalInconsistencyException', reason: 'Could not load NIB in bundle: 'NSBundle

I've gone through the same issue quite a number of times. What I've found for myself is that the xib file i'm linking would always be misspelled. In my case, this is the line of code for me that lead to the exception:

*NSArray nib = [[NSBundle mainBundle] loadNibNamed:@"shelfcell" owner:self options:nil];

The "shelfcell" was my xib file name. But i had mis spelled it as "ShelfCell", "shelfCell" etc, which lead to the exception. So dont bug your head much. Check the lines of code and the spellings. Thank you

Permission denied error while writing to a file in Python

This also happens when you attempt to create a file with the same name as a directory:

import os

conflict = 'conflict'

# Create a directory with a given name
try: 
    os.makedirs(conflict)
except OSError:
    if not os.path.isdir(conflict):
        raise

# Attempt to create a file with the same name
file = open(conflict, 'w+')

Result:

IOError: [Errno 13] Permission denied: 'conflict'

Apply a theme to an activity in Android?

You can apply a theme to any activity by including android:theme inside <activity> inside manifest file.

For example:

<activity android:theme="@android:style/Theme.Dialog">
<activity android:theme="@style/CustomTheme">

And if you want to set theme programatically then use setTheme() before calling setContentView() and super.onCreate() method inside onCreate() method.

Convert a Map<String, String> to a POJO

The answers provided so far using Jackson are so good, but still you could have a util function to help you convert different POJOs as follows:

    public static <T> T convert(Map<String, Object> aMap, Class<T> t) {
        try {
            return objectMapper
                    .convertValue(aMap, objectMapper.getTypeFactory().constructType(t));
        } catch (Exception e) {
            log.error("converting failed! aMap: {}, class: {}", getJsonString(aMap), t.getClass().getSimpleName(), e);
        }
        return null;
    }

Remove an onclick listener

mTitleView.setOnClickListener(null) should do the trick.

A better design might be to do a check of the status in the OnClickListener and then determine whether or not the click should do something vs adding and clearing click listeners.

Is there a method that tells my program to quit?

In Python 3 there is an exit() function:

elif choice == "q":
    exit()

Reset push notification settings for app

I have wondered about this in the past and came to the conclusion that it was not actually a valid test case for my code. I don't think your application code can actually tell the difference between somebody declining notifications the first time or later disabling it from the iPhone notification settings. It is true that the user experience is different but that is hidden inside the call to registerForRemoteNotificationTypes.

Calling unregisterForRemoteNotifications does not completely remove the application from the notifications settings - though it does remove the contents of the settings for that application. So this still will not cause the dialog to be presented a second time to the user the next time the app runs (at least not on v3.1.3 that I am currently testing with). But as I say above you probably should not be worrying about that.

How to add smooth scrolling to Bootstrap's scroll spy function

If you have a fixed navbar, you'll need something like this.

Taking from the best of the above answers and comments...

$(".bs-js-navbar-scrollspy li a[href^='#']").on('click', function(event) {
  var target = this.hash;

  event.preventDefault();

  var navOffset = $('#navbar').height();

  return $('html, body').animate({
    scrollTop: $(this.hash).offset().top - navOffset
  }, 300, function() {
    return window.history.pushState(null, null, target);
  });
});

First, in order to prevent the "undefined" error, store the hash to a variable, target, before calling preventDefault(), and later reference that stored value instead, as mentioned by pupadupa.

Next. You cannot use window.location.hash = target because it sets the url and the location simultaneously rather than separately. You will end up having the location at the beginning of the element whose id matches the href... but covered by your fixed top navbar.

In order to get around this, you set your scrollTop value to the vertical scroll location value of the target minus the height of your fixed navbar. Directly targeting that value maintains smooth scrolling, instead of adding an adjustment afterwards, and getting unprofessional-looking jitters.

You will notice the url doesn't change. To set this, use return window.history.pushState(null, null, target); instead, to manually add the url to the history stack.

Done!

Other notes:

1) using the .on method is the latest (as of Jan 2015) jquery method that is better than .bind or .live, or even .click for reasons I'll leave to you to find out.

2) the navOffset value can be within the function or outside, but you will probably want it outside, as you may very well reference that vertical space for other functions / DOM manipulations. But I left it inside to make it neatly into one function.

ResultSet exception - before start of result set

You need to move the pointer to the first row, before asking for data:

result.beforeFirst();
result.next();
String foundType = result.getString(1);

Why can't I push to this bare repository?

This related question's answer provided the solution for me... it was just a dumb mistake:

Remember to commit first!

https://stackoverflow.com/a/7572252

If you have not yet committed to your local repo, there is nothing to push, but the Git error message you get back doesn't help you too much.

Why and how to fix? IIS Express "The specified port is in use"

Running visual studio in administrative mode solved my issue

How to get the first element of an array?

Another one for those only concerned with truthy elements

ary.find(Boolean);

ALTER TABLE to add a composite primary key

@Adrian Cornish's answer is correct. However, there is another caveat to dropping an existing primary key. If that primary key is being used as a foreign key by another table you will get an error when trying to drop it. In some versions of mysql the error message there was malformed (as of 5.5.17, this error message is still

alter table parent  drop column id;
ERROR 1025 (HY000): Error on rename of
'./test/#sql-a04_b' to './test/parent' (errno: 150).

If you want to drop a primary key that's being referenced by another table, you will have to drop the foreign key in that other table first. You can recreate that foreign key if you still want it after you recreate the primary key.

Also, when using composite keys, order is important. These

1) ALTER TABLE provider ADD PRIMARY KEY(person,place,thing);
and
2) ALTER TABLE provider ADD PRIMARY KEY(person,thing,place);

are not the the same thing. They both enforce uniqueness on that set of three fields, however from an indexing standpoint there is a difference. The fields are indexed from left to right. For example, consider the following queries:

A) SELECT person, place, thing FROM provider WHERE person = 'foo' AND thing = 'bar';
B) SELECT person, place, thing FROM provider WHERE person = 'foo' AND place = 'baz';
C) SELECT person, place, thing FROM provider WHERE person = 'foo' AND place = 'baz' AND thing = 'bar';
D) SELECT person, place, thing FROM provider WHERE place = 'baz' AND thing = 'bar';

B can use the primary key index in ALTER statement 1
A can use the primary key index in ALTER statement 2
C can use either index
D can't use either index

A uses the first two fields in index 2 as a partial index. A can't use index 1 because it doesn't know the intermediate place portion of the index. It might still be able to use a partial index on just person though.

D can't use either index because it doesn't know person.

See the mysql docs here for more information.

What should I set JAVA_HOME environment variable on macOS X 10.6?

I am having MAC OS X(Sierra) 10.12.2.

I set JAVA_HOME to work on React Native(for Android apps) by following the following steps.

Open Terminal (Command+R, type Terminal, Hit ENTER).
Add the following lines to ~/.bash_profile. export JAVA_HOME=$(/usr/libexec/java_home)
Now run the following command. source ~/.bash_profile
You can check the exact value of JAVA_HOME by typing the following command. echo $JAVA_HOME

The value(output) returned will be something like below. /Library/Java/JavaVirtualMachines/jdk1.8.0_131.jdk/Contents/Home

That's it.

Where is SQLite database stored on disk?

.databases

If you run this command inside SQLite

.databases

it lists the path of all currently connected databases. Sample output:

seq  name             file                                                      
---  ---------------  ----------------------------------------------------------
0    main             /home/me/a.db

Hiding the address bar of a browser (popup)

It's different in every browser.

Some years ago, what you tried, was right. But nowadays it is regarded as a security risk by browser vendors that one cannot see the browsers address bar (for phishing reasons) and so they (or most of them) made the decision to always show the browser address bar. Which is good in my eyes.

Mongoose: Find, modify, save

You could also write it a little more cleaner using updateOne & $set, plus async/await.

const updateUser = async (newUser) => {
  try {
    await User.updateOne({ username: oldUsername }, {
      $set: {
        username: newUser.username,
        password: newUser.password,
        rights: newUser.rights
      }
    })
  } catch (err) {
    console.log(err)
  }
}

Since you don't need the resulting document, you can just use updateOne instead of findOneAndUpdate.

Here's a good discussion about the difference: MongoDB 3.2 - Use cases for updateOne over findOneAndUpdate

How to fix 'Object arrays cannot be loaded when allow_pickle=False' for imdb.load_data() function?

In my case worked with:

np.load(path, allow_pickle=True)

How can I put a database under git (version control)?

Check out Refactoring Databases (http://databaserefactoring.com/) for a bunch of good techniques for maintaining your database in tandem with code changes.

Suffice to say that you're asking the wrong questions. Instead of putting your database into git you should be decomposing your changes into small verifiable steps so that you can migrate/rollback schema changes with ease.

If you want to have full recoverability you should consider archiving your postgres WAL logs and use the PITR (point in time recovery) to play back/forward transactions to specific known good states.

JAVA - using FOR, WHILE and DO WHILE loops to sum 1 through 100

Well, a for or while loop differs from a do while loop. A do while executes the statements atleast once, even if the condition turns out to be false.

The for loop you specified is absolutely correct.

Although i will do all the loops for you once again.

int sum = 0;
// for loop

for (int i = 1; i<= 100; i++){
    sum = sum + i;
}
System.out.println(sum);

// while loop

sum = 0;
int j = 1;

while(j<=100){
    sum = sum + j;
    j++;
}

System.out.println(sum);

// do while loop

sum = 0;
j = 1;

do{
    sum = sum + j;
    j++;
}
while(j<=100);

System.out.println(sum);

In the last case condition j <= 100 is because, even if the condition of do while turns false, it will still execute once but that doesn't matter in this case as the condition turns true, so it continues to loop just like any other loop statement.

How to display an image stored as byte array in HTML/JavaScript?

Try putting this HTML snippet into your served document:

<img id="ItemPreview" src="">

Then, on JavaScript side, you can dynamically modify image's src attribute with so-called Data URL.

document.getElementById("ItemPreview").src = "data:image/png;base64," + yourByteArrayAsBase64;

Alternatively, using jQuery:

$('#ItemPreview').attr('src', `data:image/png;base64,${yourByteArrayAsBase64}`);

This assumes that your image is stored in PNG format, which is quite popular. If you use some other image format (e.g. JPEG), modify the MIME type ("image/..." part) in the URL accordingly.

Onchange open URL via select - jQuery

I believe the simplest way to redefine a location inside select tab is as follows:

<select onchange="location = this.value;">
     <option value="https://www.google.com/">Home</option>
     <option value="https://www.bing.com">Contact</option>
     <option value="mypets.php">Sitemap</option>
</select>

java.lang.OutOfMemoryError: Java heap space in Maven

I have solved this problem on my side by 2 ways:

Adding this configuration in pom.xml

<configuration><argLine>-Xmx1024m</argLine></configuration>

Switch to used JDK 1.7 instead of 1.6

What is the advantage of using REST instead of non-REST HTTP?

I recommend taking a look at Ryan Tomayko's How I Explained REST to My Wife

Third party edit

Excerpt from the waybackmaschine link:

How about an example. You’re a teacher and want to manage students:

what classes they’re in,
what grades they’re getting,
emergency contacts,
information about the books you teach out of, etc.

If the systems are web-based, then there’s probably a URL for each of the nouns involved here: student, teacher, class, book, room, etc. ... If there were a machine readable representation for each URL, then it would be trivial to latch new tools onto the system because all of that information would be consumable in a standard way. ... you could build a country-wide system that was able to talk to each of the individual school systems to collect testing scores.

Each of the systems would get information from each other using a simple HTTP GET. If one system needs to add something to another system, it would use an HTTP POST. If a system wants to update something in another system, it uses an HTTP PUT. The only thing left to figure out is what the data should look like.

Bypass popup blocker on window.open when JQuery event.preventDefault() is set

I had this problem and I didn't have my url ready untill the callback would return some data. The solution was to open blank window before starting the callback and then just set the location when the callback returns.

$scope.testCode = function () {
    var newWin = $window.open('', '_blank');
    service.testCode().then(function (data) {
        $scope.testing = true;
        newWin.location = '/Tests/' + data.url.replace(/["]/g, "");
    });
};

Converting DateTime format using razor

For Razor put the file DateTime.cshtml in the Views/Shared/EditorTemplates folder. DateTime.cshtml contains two lines and produces a TextBox with a date formatted 9/11/2001.

@model DateTime?
@Html.TextBox("", (Model.HasValue ? Model.Value.ToShortDateString() : string.Empty), new { @class = "datePicker" })

Why do I have to define LD_LIBRARY_PATH with an export every time I run my application?

Instead of overriding the library search path at runtime with LD_LIBRARY_PATH, you could instead bake it into the binary itself with rpath. If you link with GCC adding -Wl,-rpath,<libdir> should do the trick, if you link with ld it's just -rpath <libdir>.

jquery get all form elements: input, textarea & select

The below code helps to get the details of elements from the specific form with the form id,

$('#formId input, #formId select').each(
    function(index){  
        var input = $(this);
        alert('Type: ' + input.attr('type') + 'Name: ' + input.attr('name') + 'Value: ' + input.val());
    }
);

The below code helps to get the details of elements from all the forms which are place in the loading page,

$('form input, form select').each(
    function(index){  
        var input = $(this);
        alert('Type: ' + input.attr('type') + 'Name: ' + input.attr('name') + 'Value: ' + input.val());
    }
);

The below code helps to get the details of elements which are place in the loading page even when the element is not place inside the tag,

$('input, select').each(
    function(index){  
        var input = $(this);
        alert('Type: ' + input.attr('type') + 'Name: ' + input.attr('name') + 'Value: ' + input.val());
    }
);

NOTE: We add the more element tag name what we need in the object list like as below,

Example: to get name of attribute "textarea",

$('input, select, textarea').each(
    function(index){  
        var input = $(this);
        alert('Type: ' + input.attr('type') + 'Name: ' + input.attr('name') + 'Value: ' + input.val());
    }
);

How to store Node.js deployment settings/configuration files?

My solution is fairly simple:

Load the environment config in ./config/index.js

var env = process.env.NODE_ENV || 'development'
  , cfg = require('./config.'+env);

module.exports = cfg;

Define some defaults in ./config/config.global.js

var config = module.exports = {};

config.env = 'development';
config.hostname = 'dev.example.com';

//mongo database
config.mongo = {};
config.mongo.uri = process.env.MONGO_URI || 'localhost';
config.mongo.db = 'example_dev';

Override the defaults in ./config/config.test.js

var config = require('./config.global');

config.env = 'test';
config.hostname = 'test.example';
config.mongo.db = 'example_test';

module.exports = config;

Using it in ./models/user.js:

var mongoose = require('mongoose')
, cfg = require('../config')
, db = mongoose.createConnection(cfg.mongo.uri, cfg.mongo.db);

Running your app in test environment:

NODE_ENV=test node ./app.js

How to color System.out.println output?

System.err.println("Errorrrrrr") it will print text in Red color on console.

How to find out the location of currently used MySQL configuration file in linux

You can use the report process status ps command:

ps ax | grep '[m]ysqld'

What is use of c_str function In c++

Oh must add my own pick here, you will use this when you encode/decode some string obj you transfer between two programs.

Lets say you use base64encode some array in python, and then you want to decode that into c++. Once you have the string you decode from base64decode in c++. In order to get it back to array of float, all you need to do here is

float arr[1024];
memcpy(arr, ur_string.c_str(), sizeof(float) * 1024);

This is pretty common use I suppose.

JNI converting jstring to char *

Thanks Jason Rogers's answer first.

In Android && cpp should be this:

const char *nativeString = env->GetStringUTFChars(javaString, nullptr);

// use your string

env->ReleaseStringUTFChars(javaString, nativeString);

Can fix this errors:

1.error: base operand of '->' has non-pointer type 'JNIEnv {aka _JNIEnv}'

2.error: no matching function for call to '_JNIEnv::GetStringUTFChars(JNIEnv*&, _jstring*&, bool)'

3.error: no matching function for call to '_JNIEnv::ReleaseStringUTFChars(JNIEnv*&, _jstring*&, char const*&)'

4.add "env->DeleteLocalRef(nativeString);" at end.

How to avoid java.util.ConcurrentModificationException when iterating through and removing elements from an ArrayList

Do the loop in the normal way, the java.util.ConcurrentModificationException is an error related to the elements that are accessed.

So try:

for(int i = 0; i < list.size(); i++){
    lista.get(i).action();
}

In HTML I can make a checkmark with ✓ . Is there a corresponding X-mark?

A corresponding cross for ✓ ✓ would be ✗ ✗ I think (Dingbats).

How to create custom spinner like border around the spinner with down triangle on the right side?

You can achieve the following by using a single line in your spinner declaration in XML:

Just add this: style="@android:style/Widget.Holo.Light.Spinner"

This is a default generated style in android. It doesn't contain borders around it though. For that you'd better search something on google.

Hope this helps.

UPDATE: AFter a lot of digging I got something which works well for introducing border around spinner.

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:bottom="8dp"
        android:top="8dp">
        <shape>
            <solid android:color="@android:color/white" />
            <corners android:radius="4dp" />
            <stroke
                android:width="2dp"
                android:color="#9E9E9E" />
            <padding
                android:bottom="16dp"
                android:left="8dp"
                android:right="16dp"
                android:top="16dp" />
        </shape>
    </item>
</layer-list>

Place this in the drawable folder and use it as a background for spinner. Like this:

<RelativeLayout
        android:id="@+id/speaker_relative_layout"
        android:layout_width="0dp"
        android:layout_height="70dp"
        android:layout_marginEnd="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="16dp"
        android:background="@drawable/spinner_style"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <Spinner
            android:id="@+id/select_speaker_spinner"
            style="@style/Widget.AppCompat.DropDownItem.Spinner"
            android:layout_width="match_parent"
            android:layout_height="70dp"
            android:entries="@array/select_speaker_spinner_array"
            android:spinnerMode="dialog" />

    </RelativeLayout>

When should I use nil and NULL in Objective-C?

Basically: nil: null pointer on an object and null: is for other type pointer

Android - Round to 2 decimal places

How do I convert an interval into a number of hours with postgres?

         select date 'now()' - date '1955-12-15';

Here is the simple query which calculates total no of days.

How can I get form data with JavaScript/jQuery?

I wrote a library to solve this very problem: JSONForms. It takes a form, goes through each input and builds a JSON object you can easily read.

Say you have the following form:

<form enctype='application/json'>
  <input name='places[0][city]' value='New York City'>
  <input type='number' name='places[0][population]' value='8175133'>
  <input name='places[1][city]' value='Los Angeles'>
  <input type='number' name='places[1][population]' value='3792621'>
  <input name='places[2][city]' value='Chicago'>
  <input type='number' name='places[2][population]' value='2695598'>
</form>

Passing the form to JSONForms' encode method returns you the following object:

{
  "places": [
    {
      "city": "New York City",
      "population": 8175133
    },
    {
      "city": "Los Angeles",
      "population": 3792621
    },
    {
      "city": "Chicago",
      "population": 2695598
    }
  ]
}

Here's demo with your form.

Execute JavaScript code stored as a string

New Function and apply() together works also

var a=new Function('alert(1);')
a.apply(null)

How to write unit testing for Angular / TypeScript for private methods with Jasmine

Do not write tests for private methods. This defeats the point of unit tests.

You should be testing the public API of your class
You should NOT be testing the implimentation details of your class

Example

class SomeClass {

  public addNumber(a: number, b: number) {
      return a + b;
  }
}

The test for this method should not need to change if later the implementation changes but the behaviour of the public API remains the same.

class SomeClass {

  public addNumber(a: number, b: number) {
      return this.add(a, b);
  }

  private add(a: number, b: number) {
       return a + b;
  }
}

Don't make methods and properties public just in order to test them. This usually means that either:

You are trying to test implementation rather than API (public interface).
You should move the logic in question into its own class to make testing easier.

Check if an array contains duplicate values

Assuming you're targeting browsers that aren't IE8,

this would work as well:

function checkIfArrayIsUnique(myArray) 
{
    for (var i = 0; i < myArray.length; i++) 
    {
        if (myArray.indexOf(myArray[i]) !== myArray.lastIndexOf(myArray[i])) { 
            return false; 
        } 
    } 
    return true;   // this means not unique
}

Find the day of a week

start = as.POSIXct("2017-09-01")
end = as.POSIXct("2017-09-06")

dat = data.frame(Date = seq.POSIXt(from = start,
                                   to = end,
                                   by = "DSTday"))

# see ?strptime for details of formats you can extract

# day of the week as numeric (Monday is 1)
dat$weekday1 = as.numeric(format(dat$Date, format = "%u"))

# abbreviated weekday name
dat$weekday2 = format(dat$Date, format = "%a")

# full weekday name
dat$weekday3 = format(dat$Date, format = "%A")

dat
# returns
    Date       weekday1 weekday2  weekday3
1 2017-09-01        5      Fri    Friday
2 2017-09-02        6      Sat    Saturday
3 2017-09-03        7      Sun    Sunday
4 2017-09-04        1      Mon    Monday
5 2017-09-05        2      Tue    Tuesday
6 2017-09-06        3      Wed    Wednesday

Base table or view not found: 1146 Table Laravel 5

This problem occur due to wrong spell or undefined database name. Make sure your database name, table name and all column name is same as from phpmyadmin.

Thank You

How to set shadows in React Native for android?

Just use 'elevation' property to get shadow in android. something like below

const Header = () => {
    // const { textStyle, viewStyle } = styles;
    return (
      <View style={styles.viewStyle}>    
        <Text style={styles.textStyle}>Albums</Text>
      </View>
    )
}


const styles = {
    viewStyle:{
        backgroundColor:'#f8f8f8',
        justifyContext:'center',
        alignItems: 'center',
        padding:16,
        elevation: 2
    }
}

Allowing the "Enter" key to press the submit button, as opposed to only using MouseClick

I know this isn't the best way to do it, but right click the button in question, events, key, key typed. This is a simple way to do it, but reacts to any key

Docker error : no space left on device

you can also use:

docker system prune

or for just volumes:

docker volume prune

Error: Specified cast is not valid. (SqlManagerUI)

Sometimes it happens because of the version change like store 2012 db on 2008, so how to check it?

RESTORE VERIFYONLY FROM DISK = N'd:\yourbackup.bak'

if it gives error like:

Msg 3241, Level 16, State 13, Line 2 The media family on device 'd:\alibaba.bak' is incorrectly formed. SQL Server cannot process this media family. Msg 3013, Level 16, State 1, Line 2 VERIFY DATABASE is terminating abnormally.

Check it further:

RESTORE HEADERONLY FROM DISK = N'd:\yourbackup.bak'

BackupName is "* INCOMPLETE *", Position is "1", other fields are "NULL".

Means either your backup is corrupt or taken from newer version.

Is there a way to make numbers in an ordered list bold?

You also could put <span style="font-weight:normal"> around a,b,c and then bold the ul in the CSS.

Example

ul {
    font-weight: bold;
}

<ul><li><span style="font-weight:normal">a</span></li></ul>

If statement for strings in python?

You want:

answer = str(raw_input("Is the information correct? Enter Y for yes or N for no"))
if answer == "y" or answer == "Y":
  print("this will do the calculation")
else:
  exit()

answer = str(raw_input("Is the information correct? Enter Y for yes or N for no"))
if answer in ["y","Y"]:
  print("this will do the calculation")
else:
  exit()

Note:

It's "if", not "If". Python is case sensitive.
Indentation is important.
There is no colon or semi-colon at the end of python commands.
You want raw_input not input; input evals the input.
"or" gives you the first result if it evaluates to true, and the second result otherwise. So "a" or "b" evaluates to "a", whereas 0 or "b" evaluates to "b". See The Peculiar Nature of and and or.

How to open up a form from another form in VB.NET?

Private Sub Button3_Click(sender As System.Object, e As System.EventArgs) _
                          Handles Button3.Click

    Dim box = New AboutBox1()
    box.Show()

End Sub

Swift - how to make custom header for UITableView?

add label to subview of custom view, no need of self.view.addSubview(view), because viewForHeaderInSection return the UIView

view.addSubview(label)

How do I access Configuration in any class in ASP.NET Core?

In ASP.NET Core, there are configuration providers for reading configurations from almost anywhere such as files e.g. JSON, INI or XML, environment variables, Azure key vault, command-line arguments, etc. and many more sources. I have written a step by step guide to show you how can you configure your application settings in various files such as JSON, INI or XML and how can you read those settings from your application code. I will also demonstrate how can you read application settings as custom .NET types (classes) and how can you use the built-in ASP.NET Core dependency injection to read your configuration settings in multiple classes, services or even projects available in your solution.

Read A Step by Step Guide for ASP.NET Core Configuration

Edit and replay XHR chrome/firefox etc?

5 years have passed and this essential requirement didn't get ignored by the Chrome devs.
While they offer no method to edit the data like in Firefox, they offer a full XHR replay.
This allows to debug ajax calls.

"Replay XHR" will repeat the entire transmission.

Angular2 equivalent of $document.ready()

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

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

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

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

How do I get PHP errors to display?

You can show Php error in your display via simple ways. Firstly, just put this below code in your php.ini file.

display_errors = on;

(if you don't have access to php.ini, then putting this line in .htaccess might work too):

php_flag display_errors 1

OR you can also use the following code in your index.php file

ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);

Create normal zip file programmatically

Here's some code I wrote after using the above posts. Thanks for all your help.

This code accepts a list of file paths and creates a zip file out of them.

public class Zip
{
    private string _filePath;
    public string FilePath { get { return _filePath; } }

    /// <summary>
    /// Zips a set of files
    /// </summary>
    /// <param name="filesToZip">A list of filepaths</param>
    /// <param name="sZipFileName">The file name of the new zip (do not include the file extension, nor the full path - just the name)</param>
    /// <param name="deleteExistingZip">Whether you want to delete the existing zip file</param>
    /// <remarks>
    /// Limitation - all files must be in the same location. 
    /// Limitation - must have read/write/edit access to folder where first file is located.
    /// Will throw exception if the zip file already exists and you do not specify deleteExistingZip
    /// </remarks>
    public Zip(List<string> filesToZip, string sZipFileName, bool deleteExistingZip = true)
    {
        if (filesToZip.Count > 0)
        {
            if (File.Exists(filesToZip[0]))
            {

                // Get the first file in the list so we can get the root directory
                string strRootDirectory = Path.GetDirectoryName(filesToZip[0]);

                // Set up a temporary directory to save the files to (that we will eventually zip up)
                DirectoryInfo dirTemp = Directory.CreateDirectory(strRootDirectory + "/" + DateTime.Now.ToString("yyyyMMddhhmmss"));

                // Copy all files to the temporary directory
                foreach (string strFilePath in filesToZip)
                {
                    if (!File.Exists(strFilePath))
                    {
                        throw new Exception(string.Format("File {0} does not exist", strFilePath));
                    }
                    string strDestinationFilePath = Path.Combine(dirTemp.FullName, Path.GetFileName(strFilePath));
                    File.Copy(strFilePath, strDestinationFilePath);
                }

                // Create the zip file using the temporary directory
                if (!sZipFileName.EndsWith(".zip")) { sZipFileName += ".zip"; }
                string strZipPath = Path.Combine(strRootDirectory, sZipFileName);
                if (deleteExistingZip == true && File.Exists(strZipPath)) { File.Delete(strZipPath); }
                ZipFile.CreateFromDirectory(dirTemp.FullName, strZipPath, CompressionLevel.Fastest, false);

                // Delete the temporary directory
                dirTemp.Delete(true);

                _filePath = strZipPath;                    
            }
            else
            {
                throw new Exception(string.Format("File {0} does not exist", filesToZip[0]));
            }
        }
        else
        {
            throw new Exception("You must specify at least one file to zip.");
        }
    }
}

How do emulators work and how are they written?

A guy named Victor Moya del Barrio wrote his thesis on this topic. A lot of good information on 152 pages. You can download the PDF here.

If you don't want to register with scribd, you can google for the PDF title, "Study of the techniques for emulation programming". There are a couple of different sources for the PDF.

JavaScript pattern for multiple constructors

This is the example given for multiple constructors in Programming in HTML5 with JavaScript and CSS3 - Exam Ref.

function Book() {
    //just creates an empty book.
}


function Book(title, length, author) {
    this.title = title;
    this.Length = length;
    this.author = author;
}

Book.prototype = {
    ISBN: "",
    Length: -1,
    genre: "",
    covering: "",
    author: "",
    currentPage: 0,
    title: "",

    flipTo: function FlipToAPage(pNum) {
        this.currentPage = pNum;
    },

    turnPageForward: function turnForward() {
        this.flipTo(this.currentPage++);
    },

    turnPageBackward: function turnBackward() {
        this.flipTo(this.currentPage--);
    }
};

var books = new Array(new Book(), new Book("First Edition", 350, "Random"));

Handling Dialogs in WPF with MVVM

I think the view could have code to handle the event from the view model.

Depending on the event/scenario, it could also have an event trigger that subscribes to view model events, and one or more actions to invoke in response.

How to destroy a JavaScript object?

I was facing a problem like this, and had the idea of simply changing the innerHTML of the problematic object's children.

adiv.innerHTML = "<div...> the original html that js uses </div>";

Seems dirty, but it saved my life, as it works!

XAMPP Apache Webserver localhost not working on MAC OS

This is because in Mac OS X there is already Apache pre-installed. So what you can do is to change the listening port of one of the Apaches, either the Apache that you installed with XAMPP or the pre-installed one.

To change the listening port for XAMPP's Apache, go to /Applications/XAMPP/xamppfiles/etc and edit httpd.conf. Change the line "Listen 80" (80 is the listening port) to other port, eg. "Listen 1234".

Or,

To change the one for pre-installed Apache, go to /etc/apache2. You can do the same thing with file httpd.conf there.

After changing you might need to restart your Mac, just to make sure.

Converting between java.time.LocalDateTime and java.util.Date

I'm not sure if this is the simplest or best way, or if there are any pitfalls, but it works:

static public LocalDateTime toLdt(Date date) {
    GregorianCalendar cal = new GregorianCalendar();
    cal.setTime(date);
    ZonedDateTime zdt = cal.toZonedDateTime();
    return zdt.toLocalDateTime();
}

static public Date fromLdt(LocalDateTime ldt) {
    ZonedDateTime zdt = ZonedDateTime.of(ldt, ZoneId.systemDefault());
    GregorianCalendar cal = GregorianCalendar.from(zdt);
    return cal.getTime();
}

How to secure an ASP.NET Web API

I would suggest starting with the most straightforward solutions first - maybe simple HTTP Basic Authentication + HTTPS is enough in your scenario.

If not (for example you cannot use https, or need more complex key management), you may have a look at HMAC-based solutions as suggested by others. A good example of such API would be Amazon S3 (http://s3.amazonaws.com/doc/s3-developer-guide/RESTAuthentication.html)

I wrote a blog post about HMAC based authentication in ASP.NET Web API. It discusses both Web API service and Web API client and the code is available on bitbucket. http://www.piotrwalat.net/hmac-authentication-in-asp-net-web-api/

Here is a post about Basic Authentication in Web API: http://www.piotrwalat.net/basic-http-authentication-in-asp-net-web-api-using-message-handlers/

Remember that if you are going to provide an API to 3rd parties, you will also most likely be responsible for delivering client libraries. Basic authentication has a significant advantage here as it is supported on most programming platforms out of the box. HMAC, on the other hand, is not that standardized and will require custom implementation. These should be relatively straightforward but still require work.

PS. There is also an option to use HTTPS + certificates. http://www.piotrwalat.net/client-certificate-authentication-in-asp-net-web-api-and-windows-store-apps/

Submit HTML form on self page

In 2013, with all the HTML5 stuff, you can just omit the 'action' attribute to self-submit a form

<form>

Actually, the Form Submission subsection of the current HTML5 draft does not allow action="" (empty attribute). It is against the specification.

From this other Stack Overflow answer.

jQuery - keydown / keypress /keyup ENTERKEY detection?

JavaScript/jQuery

$("#entersomething").keyup(function(e){ 
    var code = e.key; // recommended to use e.key, it's normalized across devices and languages
    if(code==="Enter") e.preventDefault();
    if(code===" " || code==="Enter" || code===","|| code===";"){
        $("#displaysomething").html($(this).val());
    } // missing closing if brace
});

HTML

<input id="entersomething" type="text" /> <!-- put a type attribute in -->
<div id="displaysomething"></div>

Check if an array is empty or exists

The best is to check like:

    let someArray: string[] = [];
    let hasAny1: boolean = !!someArray && !!someArray.length;
    let hasAny2: boolean = !!someArray && someArray.length > 0; //or like this
    console.log("And now on empty......", hasAny1, hasAny2);

See full samples list:

Why there is this "clear" class before footer?

Most likely, as mentioned by others, it is a class carrying the css values:

.clear{clear: both;}

in order to prevent any more page elements from extending into the footer element. It is a quick and easy way of making sure that pages with columns of varying heights don't cause the footer to render oddly, by possibly setting its top position at the end of a shorter column.

In many cases it is not necessary, but if you are using best-practice standards it is a good idea to use, if you are floating page elements left and right. It functions with page elements similar to the way a horizontal rule works with text, to ensure proper and complete sepperation.

How to choose an AWS profile when using boto3 to connect to CloudFront

I think the docs aren't wonderful at exposing how to do this. It has been a supported feature for some time, however, and there are some details in this pull request.

So there are three different ways to do this:

Option A) Create a new session with the profile

    dev = boto3.session.Session(profile_name='dev')

Option B) Change the profile of the default session in code

    boto3.setup_default_session(profile_name='dev')

Option C) Change the profile of the default session with an environment variable

    $ AWS_PROFILE=dev ipython
    >>> import boto3
    >>> s3dev = boto3.resource('s3')

indexOf method in an object array?

Brief

myArray.indexOf('stevie','hello')

Use Cases :

  /*****NORMAL****/  
[2,4,5].indexOf(4) ;//OUTPUT 1
 /****COMPLEX*****/
 [{slm:2},{slm:4},{slm:5}].indexOf(4,'slm');//OUTPUT 1
 //OR
 [{slm:2},{slm:4},{slm:5}].indexOf(4,function(e,i){
   return e.slm;
});//OUTPUT 1
/***MORE Complex**/
[{slm:{salat:2}},{slm:{salat:4}},{slm:{salat:5}}].indexOf(4,function(e,i){
   return e.slm.salat;
});//OUTPUT 1

API :

    Array.prototype.indexOfOld=Array.prototype.indexOf

    Array.prototype.indexOf=function(e,fn){
      if(!fn){return this.indexOfOld(e)}
      else{ 
       if(typeof fn ==='string'){var att=fn;fn=function(e){return e[att];}}
        return this.map(fn).indexOfOld(e);
      }
    };

How to check if a class inherits another class without instantiating it?

To check for assignability, you can use the Type.IsAssignableFrom method:

typeof(SomeType).IsAssignableFrom(typeof(Derived))

This will work as you expect for type-equality, inheritance-relationships and interface-implementations but not when you are looking for 'assignability' across explicit / implicit conversion operators.

To check for strict inheritance, you can use Type.IsSubclassOf:

typeof(Derived).IsSubclassOf(typeof(SomeType))

Removing space from dataframe columns in pandas

To remove white spaces:

1) To remove white space everywhere:

df.columns = df.columns.str.replace(' ', '')

2) To remove white space at the beginning of string:

df.columns = df.columns.str.lstrip()

3) To remove white space at the end of string:

df.columns = df.columns.str.rstrip()

4) To remove white space at both ends:

df.columns = df.columns.str.strip()

To replace white spaces with other characters (underscore for instance):

5) To replace white space everywhere

df.columns = df.columns.str.replace(' ', '_')

6) To replace white space at the beginning:

df.columns = df.columns.str.replace('^ +', '_')

7) To replace white space at the end:

df.columns = df.columns.str.replace(' +$', '_')

8) To replace white space at both ends:

df.columns = df.columns.str.replace('^ +| +$', '_')

All above applies to a specific column as well, assume you have a column named col, then just do:

df[col] = df[col].str.strip()  # or .replace as above

Subtracting Number of Days from a Date in PL/SQL

simply,

select sysdate-1 from dual

there's a bunch more info and detail here: http://www.orafaq.com/faq/how_does_one_add_a_day_hour_minute_second_to_a_date_value

How to concat string + i?

according to this it looks like you have to set "N" before trying to use it and it looks like it needs to be an int not string? Don't know much bout MatLab but just what i gathered from that site..hope it helps :)

<Django object > is not JSON serializable

The easiest way is to use a JsonResponse.

For a queryset, you should pass a list of the the values for that queryset, like so:

from django.http import JsonResponse

queryset = YourModel.objects.filter(some__filter="some value").values()
return JsonResponse({"models_to_return": list(queryset)})

How do I find out if first character of a string is a number?

I just came across this question and thought on contributing with a solution that does not use regex.

In my case I use a helper method:

public boolean notNumber(String input){
    boolean notNumber = false;
    try {
        // must not start with a number
        @SuppressWarnings("unused")
        double checker = Double.valueOf(input.substring(0,1));
    }
    catch (Exception e) {
        notNumber = true;           
    }
    return notNumber;
}

Probably an overkill, but I try to avoid regex whenever I can.

JQuery show/hide when hover

I hope my script help you.

<i class="mostrar-producto">mostrar...</i>
<div class="producto" style="display:none;position: absolute;">Producto</div>

My script

<script>
$(".mostrar-producto").mouseover(function(){
     $(".producto").fadeIn();
 });

 $(".mostrar-producto").mouseleave(function(){
      $(".producto").fadeOut();
  });
</script>

Creating a select box with a search option

Full option searchable select box

This also supports Control buttons keyboards such as ArrowDown ArrowUp and Enter keys

_x000D_

function filterFunction(that, event) {_x000D_
    let container, input, filter, li, input_val;_x000D_
    container = $(that).closest(".searchable");_x000D_
    input_val = container.find("input").val().toUpperCase();_x000D_
_x000D_
    if (["ArrowDown", "ArrowUp", "Enter"].indexOf(event.key) != -1) {_x000D_
        keyControl(event, container)_x000D_
    } else {_x000D_
        li = container.find("ul li");_x000D_
        li.each(function (i, obj) {_x000D_
            if ($(this).text().toUpperCase().indexOf(input_val) > -1) {_x000D_
                $(this).show();_x000D_
            } else {_x000D_
                $(this).hide();_x000D_
            }_x000D_
        });_x000D_
_x000D_
        container.find("ul li").removeClass("selected");_x000D_
        setTimeout(function () {_x000D_
            container.find("ul li:visible").first().addClass("selected");_x000D_
        }, 100)_x000D_
    }_x000D_
}_x000D_
_x000D_
function keyControl(e, container) {_x000D_
    if (e.key == "ArrowDown") {_x000D_
_x000D_
        if (container.find("ul li").hasClass("selected")) {_x000D_
            if (container.find("ul li:visible").index(container.find("ul li.selected")) + 1 < container.find("ul li:visible").length) {_x000D_
                container.find("ul li.selected").removeClass("selected").nextAll().not('[style*="display: none"]').first().addClass("selected");_x000D_
            }_x000D_
_x000D_
        } else {_x000D_
            container.find("ul li:first-child").addClass("selected");_x000D_
        }_x000D_
_x000D_
    } else if (e.key == "ArrowUp") {_x000D_
_x000D_
        if (container.find("ul li:visible").index(container.find("ul li.selected")) > 0) {_x000D_
            container.find("ul li.selected").removeClass("selected").prevAll().not('[style*="display: none"]').first().addClass("selected");_x000D_
        }_x000D_
    } else if (e.key == "Enter") {_x000D_
        container.find("input").val(container.find("ul li.selected").text()).blur();_x000D_
        onSelect(container.find("ul li.selected").text())_x000D_
    }_x000D_
_x000D_
    container.find("ul li.selected")[0].scrollIntoView({_x000D_
        behavior: "smooth",_x000D_
    });_x000D_
}_x000D_
_x000D_
function onSelect(val) {_x000D_
    alert(val)_x000D_
}_x000D_
_x000D_
$(".searchable input").focus(function () {_x000D_
    $(this).closest(".searchable").find("ul").show();_x000D_
    $(this).closest(".searchable").find("ul li").show();_x000D_
});_x000D_
$(".searchable input").blur(function () {_x000D_
    let that = this;_x000D_
    setTimeout(function () {_x000D_
        $(that).closest(".searchable").find("ul").hide();_x000D_
    }, 300);_x000D_
});_x000D_
_x000D_
$(document).on('click', '.searchable ul li', function () {_x000D_
    $(this).closest(".searchable").find("input").val($(this).text()).blur();_x000D_
    onSelect($(this).text())_x000D_
});_x000D_
_x000D_
$(".searchable ul li").hover(function () {_x000D_
    $(this).closest(".searchable").find("ul li.selected").removeClass("selected");_x000D_
    $(this).addClass("selected");_x000D_
});

_x000D_

div.searchable {_x000D_
    width: 300px;_x000D_
    float: left;_x000D_
    margin: 0 15px;_x000D_
}_x000D_
_x000D_
.searchable input {_x000D_
    width: 100%;_x000D_
    height: 50px;_x000D_
    font-size: 18px;_x000D_
    padding: 10px;_x000D_
    -webkit-box-sizing: border-box; /* Safari/Chrome, other WebKit */_x000D_
    -moz-box-sizing: border-box; /* Firefox, other Gecko */_x000D_
    box-sizing: border-box; /* Opera/IE 8+ */_x000D_
    display: block;_x000D_
    font-weight: 400;_x000D_
    line-height: 1.6;_x000D_
    color: #495057;_x000D_
    background-color: #fff;_x000D_
    background-clip: padding-box;_x000D_
    border: 1px solid #ced4da;_x000D_
    border-radius: .25rem;_x000D_
    transition: border-color .15s ease-in-out, box-shadow .15s ease-in-out;_x000D_
    background: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 4 5'%3E%3Cpath fill='%23343a40' d='M2 0L0 2h4zm0 5L0 3h4z'/%3E%3C/svg%3E") no-repeat right .75rem center/8px 10px;_x000D_
}_x000D_
_x000D_
.searchable ul {_x000D_
    display: none;_x000D_
    list-style-type: none;_x000D_
    background-color: #fff;_x000D_
    border-radius: 0 0 5px 5px;_x000D_
    border: 1px solid #add8e6;_x000D_
    border-top: none;_x000D_
    max-height: 180px;_x000D_
    margin: 0;_x000D_
    overflow-y: scroll;_x000D_
    overflow-x: hidden;_x000D_
    padding: 0;_x000D_
}_x000D_
_x000D_
.searchable ul li {_x000D_
    padding: 7px 9px;_x000D_
    border-bottom: 1px solid #e1e1e1;_x000D_
    cursor: pointer;_x000D_
    color: #6e6e6e;_x000D_
}_x000D_
_x000D_
.searchable ul li.selected {_x000D_
    background-color: #e8e8e8;_x000D_
    color: #333;_x000D_
}

_x000D_

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>_x000D_
<div class="searchable">_x000D_
    <input type="text" placeholder="search countries" onkeyup="filterFunction(this,event)">_x000D_
    <ul>_x000D_
        <li>Algeria</li>_x000D_
        <li>Bulgaria</li>_x000D_
        <li>Canada</li>_x000D_
        <li>Egypt</li>_x000D_
        <li>Fiji</li>_x000D_
        <li>India</li>_x000D_
        <li>Japan</li>_x000D_
        <li>Iran (Islamic Republic of)</li>_x000D_
        <li>Lao People's Democratic Republic</li>_x000D_
        <li>Micronesia (Federated States of)</li>_x000D_
        <li>Nicaragua</li>_x000D_
        <li>Senegal</li>_x000D_
        <li>Tajikistan</li>_x000D_
        <li>Yemen</li>_x000D_
    </ul>_x000D_
</div>

_x000D_

Windows 10 SSH keys

Warning: If you are saving your keys under C:/User/username/.ssh ( the default place), make sure to back up your keys somewhere (eg your password manager).

After the most recent Windows 10 Update (version 1607), my .ssh folder was empty. This is where my keys have always been, but Windows decided to delete them when updating.

Thankfully I had backed up my keys... But... I bet some people will be reverting their PC's today.

Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 71 bytes)

I had this problem. I searched the internet, took all advices, changes configurations, but the problem is still there. Finally with the help of the server administrator, he found that the problem lies in MySQL database column definition. one of the columns in the a table was assigned to 'Longtext' which leads to allocate 4,294,967,295 bites of memory. It seems working OK if you don't use MySqli prepare statement, but once you use prepare statement, it tries to allocate that amount of memory. I changed the column type to Mediumtext which needs 16,777,215 bites of memory space. The problem is gone. Hope this help.

Extract file name from path, no matter what the os/path format

If you have a number of files in a directory and want to store those file names into a list. Use the below code.

import os as os
import glob as glob
path = 'mypath'
file_list= []
for file in glob.glob(path):
    data_file_list = os.path.basename(file)
    file_list.append(data_file_list)

using nth-child in tables tr td

table tr td:nth-child(2) {
    background: #ccc;
}

Working example: http://jsfiddle.net/gqr3J/

How to get the current time in Python

import datetime
x = datetime.datetime.now()
print(x)

I found this earlier this year while I was learning python on W3Schools! I highly recommend you using w3schools for small doubts :-)

Convert HTML to PDF in .NET

Instead of parsing HTML directly to PDF, you can create an Bitmap of your HTML-page and then insert the Bitmap into your PDF, using for example iTextSharp.

Here's a code how to get an Bitmap of an URL. I found it somewhere here on SO, if I find the source I'll link it.

public System.Drawing.Bitmap HTMLToImage(String strHTML)
{
    System.Drawing.Bitmap myBitmap = null;

    System.Threading.Thread myThread = new System.Threading.Thread(delegate()
    {
        // create a hidden web browser, which will navigate to the page
        System.Windows.Forms.WebBrowser myWebBrowser = new System.Windows.Forms.WebBrowser();
        // we don't want scrollbars on our image
        myWebBrowser.ScrollBarsEnabled = false;
        // don't let any errors shine through
        myWebBrowser.ScriptErrorsSuppressed = true;
        // let's load up that page!    
        myWebBrowser.Navigate("about:blank");

        // wait until the page is fully loaded
        while (myWebBrowser.ReadyState != System.Windows.Forms.WebBrowserReadyState.Complete)
            System.Windows.Forms.Application.DoEvents();

        myWebBrowser.Document.Body.InnerHtml = strHTML;

        // set the size of our web browser to be the same size as the page
        int intScrollPadding = 20;
        int intDocumentWidth = myWebBrowser.Document.Body.ScrollRectangle.Width + intScrollPadding;
        int intDocumentHeight = myWebBrowser.Document.Body.ScrollRectangle.Height + intScrollPadding;
        myWebBrowser.Width = intDocumentWidth;
        myWebBrowser.Height = intDocumentHeight;
        // a bitmap that we will draw to
        myBitmap = new System.Drawing.Bitmap(intDocumentWidth - intScrollPadding, intDocumentHeight - intScrollPadding);
        // draw the web browser to the bitmap
        myWebBrowser.DrawToBitmap(myBitmap, new System.Drawing.Rectangle(0, 0, intDocumentWidth - intScrollPadding, intDocumentHeight - intScrollPadding));
    });
    myThread.SetApartmentState(System.Threading.ApartmentState.STA);
    myThread.Start();
    myThread.Join();

    return myBitmap;
}

Searching in a ArrayList with custom objects for certain strings

UPDATE: Using Java 8 Syntax

List<DataPoint> myList = new ArrayList<>();
//Fill up myList with your Data Points

List<DataPoint> dataPointsCalledJohn = 
    myList
    .stream()
    .filter(p-> p.getName().equals(("john")))
    .collect(Collectors.toList());

If you don't mind using an external libaray - you can use Predicates from the Google Guava library as follows:

class DataPoint {
    String name;

    String getName() { return name; }
}

Predicate<DataPoint> nameEqualsTo(final String name) {
    return new Predicate<DataPoint>() {

        public boolean apply(DataPoint dataPoint) {
            return dataPoint.getName().equals(name);
        }
    };
}

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

    List<DataPoint> myList = new ArrayList<DataPoint>();
    //Fill up myList with your Data Points

    Collection<DataPoint> dataPointsCalledJohn =
            Collections2.filter(myList, nameEqualsTo("john"));

}

How does Java handle integer underflows and overflows and how would you check for it?

Having just kinda run into this problem myself, here's my solution (for both multiplication and addition):

static boolean wouldOverflowOccurwhenMultiplying(int a, int b) {
    // If either a or b are Integer.MIN_VALUE, then multiplying by anything other than 0 or 1 will result in overflow
    if (a == 0 || b == 0) {
        return false;
    } else if (a > 0 && b > 0) { // both positive, non zero
        return a > Integer.MAX_VALUE / b;
    } else if (b < 0 && a < 0) { // both negative, non zero
        return a < Integer.MAX_VALUE / b;
    } else { // exactly one of a,b is negative and one is positive, neither are zero
        if (b > 0) { // this last if statements protects against Integer.MIN_VALUE / -1, which in itself causes overflow.
            return a < Integer.MIN_VALUE / b;
        } else { // a > 0
            return b < Integer.MIN_VALUE / a;
        }
    }
}

boolean wouldOverflowOccurWhenAdding(int a, int b) {
    if (a > 0 && b > 0) {
        return a > Integer.MAX_VALUE - b;
    } else if (a < 0 && b < 0) {
        return a < Integer.MIN_VALUE - b;
    }
    return false;
}

feel free to correct if wrong or if can be simplified. I've done some testing with the multiplication method, mostly edge cases, but it could still be wrong.

AngularJS Folder Structure

I like this entry about angularjs structure

It's written by one of the angularjs developers, so should give you a good insight

Here's an excerpt:

root-app-folder
+-- index.html
+-- scripts
¦   +-- controllers
¦   ¦   +-- main.js
¦   ¦   +-- ...
¦   +-- directives
¦   ¦   +-- myDirective.js
¦   ¦   +-- ...
¦   +-- filters
¦   ¦   +-- myFilter.js
¦   ¦   +-- ...
¦   +-- services
¦   ¦   +-- myService.js
¦   ¦   +-- ...
¦   +-- vendor
¦   ¦   +-- angular.js
¦   ¦   +-- angular.min.js
¦   ¦   +-- es5-shim.min.js
¦   ¦   +-- json3.min.js
¦   +-- app.js
+-- styles
¦   +-- ...
+-- views
    +-- main.html
    +-- ...

How do I write a bash script to restart a process if it dies?

Avoid PID-files, crons, or anything else that tries to evaluate processes that aren't their children.

There is a very good reason why in UNIX, you can ONLY wait on your children. Any method (ps parsing, pgrep, storing a PID, ...) that tries to work around that is flawed and has gaping holes in it. Just say no.

Instead you need the process that monitors your process to be the process' parent. What does this mean? It means only the process that starts your process can reliably wait for it to end. In bash, this is absolutely trivial.

until myserver; do
    echo "Server 'myserver' crashed with exit code $?.  Respawning.." >&2
    sleep 1
done

The above piece of bash code runs myserver in an until loop. The first line starts myserver and waits for it to end. When it ends, until checks its exit status. If the exit status is 0, it means it ended gracefully (which means you asked it to shut down somehow, and it did so successfully). In that case we don't want to restart it (we just asked it to shut down!). If the exit status is not 0, until will run the loop body, which emits an error message on STDERR and restarts the loop (back to line 1) after 1 second.

Why do we wait a second? Because if something's wrong with the startup sequence of myserver and it crashes immediately, you'll have a very intensive loop of constant restarting and crashing on your hands. The sleep 1 takes away the strain from that.

Now all you need to do is start this bash script (asynchronously, probably), and it will monitor myserver and restart it as necessary. If you want to start the monitor on boot (making the server "survive" reboots), you can schedule it in your user's cron(1) with an @reboot rule. Open your cron rules with crontab:

crontab -e

Then add a rule to start your monitor script:

@reboot /usr/local/bin/myservermonitor

Alternatively; look at inittab(5) and /etc/inittab. You can add a line in there to have myserver start at a certain init level and be respawned automatically.

Edit.

Let me add some information on why not to use PID files. While they are very popular; they are also very flawed and there's no reason why you wouldn't just do it the correct way.

Consider this:

PID recycling (killing the wrong process):
- /etc/init.d/foo start: start foo, write foo's PID to /var/run/foo.pid
- A while later: foo dies somehow.
- A while later: any random process that starts (call it bar) takes a random PID, imagine it taking foo's old PID.
- You notice foo's gone: /etc/init.d/foo/restart reads /var/run/foo.pid, checks to see if it's still alive, finds bar, thinks it's foo, kills it, starts a new foo.
PID files go stale. You need over-complicated (or should I say, non-trivial) logic to check whether the PID file is stale, and any such logic is again vulnerable to 1..
What if you don't even have write access or are in a read-only environment?
It's pointless overcomplication; see how simple my example above is. No need to complicate that, at all.

By the way; even worse than PID files is parsing ps! Don't ever do this.

ps is very unportable. While you find it on almost every UNIX system; its arguments vary greatly if you want non-standard output. And standard output is ONLY for human consumption, not for scripted parsing!
Parsing ps leads to a LOT of false positives. Take the ps aux | grep PID example, and now imagine someone starting a process with a number somewhere as argument that happens to be the same as the PID you stared your daemon with! Imagine two people starting an X session and you grepping for X to kill yours. It's just all kinds of bad.

If you don't want to manage the process yourself; there are some perfectly good systems out there that will act as monitor for your processes. Look into runit, for example.

remove script tag from HTML content

Use the PHP DOMDocument parser.

$doc = new DOMDocument();

// load the HTML string we want to strip
$doc->loadHTML($html);

// get all the script tags
$script_tags = $doc->getElementsByTagName('script');

$length = $script_tags->length;

// for each tag, remove it from the DOM
for ($i = 0; $i < $length; $i++) {
  $script_tags->item($i)->parentNode->removeChild($script_tags->item($i));
}

// get the HTML string back
$no_script_html_string = $doc->saveHTML();

This worked me me using the following HTML document:

<!doctype html>
<html>
    <head>
        <meta charset="utf-8">
        <title>
            hey
        </title>
        <script>
            alert("hello");
        </script>
    </head>
    <body>
        hey
    </body>
</html>

Just bear in mind that the DOMDocument parser requires PHP 5 or greater.

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

C# uses the UTF16 format for its strings.
So, besides just converting the types, you should also be conscious about the string's actual format.

When compiling for Multi-byte Character set Visual Studio and the Win API assumes UTF8 (Actually windows encoding which is Windows-28591 ).
When compiling for Unicode Character set Visual studio and the Win API assume UTF16.

So, you must convert the string from UTF16 to UTF8 format as well, and not just convert to std::string.
This will become necessary when working with multi-character formats like some non-latin languages.

The idea is to decide that std::wstring always represents UTF16.
And std::string always represents UTF8.

This isn't enforced by the compiler, it's more of a good policy to have.

#include "stdafx.h"
#include <string>
#include <codecvt>
#include <msclr\marshal_cppstd.h>

using namespace System;

int main(array<System::String ^> ^args)
{
    System::String^ managedString = "test";

    msclr::interop::marshal_context context;

    //Actual format is UTF16, so represent as wstring
    std::wstring utf16NativeString = context.marshal_as<std::wstring>(managedString); 

    //C++11 format converter
    std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> convert;

    //convert to UTF8 and std::string
    std::string utf8NativeString = convert.to_bytes(utf16NativeString);

    return 0;
}

Or have it in a more compact syntax:

int main(array<System::String ^> ^args)
{
    System::String^ managedString = "test";

    msclr::interop::marshal_context context;
    std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> convert;

    std::string utf8NativeString = convert.to_bytes(context.marshal_as<std::wstring>(managedString));

    return 0;
}

Find Facebook user (url to profile page) by known email address

The definitive answer to this is from Facebook themselves. In post today at https://developers.facebook.com/bugs/335452696581712 a Facebook dev says

The ability to pass in an e-mail address into the "user" search type was
removed on July 10, 2013. This search type only returns results that match
a user's name (including alternate name).

So, alas, the simple answer is you can no longer search for users by their email address. This sucks, but that's Facebook's new rules.

How to extract request http headers from a request using NodeJS connect

To see a list of HTTP request headers, you can use :

console.log(JSON.stringify(req.headers));

to return a list in JSON format.

{
"host":"localhost:8081",
"connection":"keep-alive",
"cache-control":"max-age=0",
"accept":"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
"upgrade-insecure-requests":"1",
"user-agent":"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.107 Safari/537.36",
"accept-encoding":"gzip, deflate, sdch",
"accept-language":"en-US,en;q=0.8,et;q=0.6"
}

Bootstrap 3: How to get two form inputs on one line and other inputs on individual lines?

I resorted to creating 2 style cascades using inline-block for input that pretty much override the field:

.input-sm {
    height: 2.1em;
    display: inline-block;
}

and a series of fixed sizes as opposed to %

.input-10 {
    width: 10em;
}

.input-32 {
    width: 32em;
}

HTML5 placeholder css padding

I've created a fiddle using your screenshot as a background image and stripping out the extra mark-up, and it seems to work fine

http://jsfiddle.net/fLdQG/2/ (webkit browser required)

Does this work for you? If not, can you update the fiddle with your exact mark-up and CSS?

Save a subplot in matplotlib

While @Eli is quite correct that there usually isn't much of a need to do it, it is possible. savefig takes a bbox_inches argument that can be used to selectively save only a portion of a figure to an image.

Here's a quick example:

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

# Make an example plot with two subplots...
fig = plt.figure()
ax1 = fig.add_subplot(2,1,1)
ax1.plot(range(10), 'b-')

ax2 = fig.add_subplot(2,1,2)
ax2.plot(range(20), 'r^')

# Save the full figure...
fig.savefig('full_figure.png')

# Save just the portion _inside_ the second axis's boundaries
extent = ax2.get_window_extent().transformed(fig.dpi_scale_trans.inverted())
fig.savefig('ax2_figure.png', bbox_inches=extent)

# Pad the saved area by 10% in the x-direction and 20% in the y-direction
fig.savefig('ax2_figure_expanded.png', bbox_inches=extent.expanded(1.1, 1.2))

The full figure: Full Example Figure

Area inside the second subplot: Inside second subplot

Area around the second subplot padded by 10% in the x-direction and 20% in the y-direction: Full second subplot

How can I get nth element from a list?

Haskell's standard list data type forall t. [t] in implementation closely resembles a canonical C linked list, and shares its essentially properties. Linked lists are very different from arrays. Most notably, access by index is a O(n) linear-, instead of a O(1) constant-time operation.

If you require frequent random access, consider the Data.Array standard.

!! is an unsafe partially defined function, provoking a crash for out-of-range indices. Be aware that the standard library contains some such partial functions (head, last, etc.). For safety, use an option type Maybe, or the Safe module.

Example of a reasonably efficient, robust total (for indices = 0) indexing function:

data Maybe a = Nothing | Just a

lookup :: Int -> [a] -> Maybe a
lookup _ []       = Nothing
lookup 0 (x : _)  = Just x
lookup i (_ : xs) = lookup (i - 1) xs

Working with linked lists, often ordinals are convenient:

nth :: Int -> [a] -> Maybe a
nth _ []       = Nothing
nth 1 (x : _)  = Just x
nth n (_ : xs) = nth (n - 1) xs

What is the simplest method of inter-process communication between 2 C# processes?

The easiest solution in C# for inter-process communication when security is not a concern and given your constraints (two C# processes on the same machine) is the Remoting API. Now Remoting is a legacy technology (not the same as deprecated) and not encouraged for use in new projects, but it does work well and does not require a lot of pomp and circumstance to get working.

There is an excellent article on MSDN for using the class IpcChannel from the Remoting framework (credit to Greg Beech for the find here) for setting up a simple remoting server and client.

I Would suggest trying this approach first, and then try to port your code to WCF (Windows Communication Framework). Which has several advantages (better security, cross-platform), but is necessarily more complex. Luckily MSDN has a very good article for porting code from Remoting to WCF.

If you want to dive in right away with WCF there is a great tutorial here.

Bootstrap 4 Center Vertical and Horizontal Alignment

You need something to center your form into. But because you didn't specify a height for your html and body, it would just wrap content - and not the viewport. In other words, there was no room where to center the item in.

html, body {
  height: 100%;
}
.container, .row.justify-content-center.align-items-center {
  height: 100%;
  min-height: 100%;
}

Java ArrayList of Arrays?

Since the size of your string array is fixed at compile time, you'd be better off using a structure (like Pair) that mandates exactly two fields, and thus avoid the runtime errors possible with the array approach.

Code:

Since Java doesn't supply a Pair class, you'll need to define your own.

class Pair<A, B> {
  public final A first;
  public final B second;

  public Pair(final A first, final B second) {
    this.first = first;
    this.second = second;
  }

  //
  // Override 'equals', 'hashcode' and 'toString'
  //
}

and then use it as:

List<Pair<String, String>> action = new ArrayList<Pair<String, String>>();

[ Here I used List because it's considered a good practice to program to interfaces. ]

Return 0 if field is null in MySQL

You can try something like this

IFNULL(NULLIF(X, '' ), 0)

Attribute X is assumed to be empty if it is an empty String, so after that you can declare as a zero instead of last value. In another case, it would remain its original value.

Anyway, just to give another way to do that.

What is the difference between exit(0) and exit(1) in C?

exit(0) is equivalent to exit(EXIT_SUCCESS).

exit(1) is equivalent to exit(EXIT_FAILURE).

On failure normally any positive value get returned to exit the process, that you can find on shell by using $?.

Value more than 128 that is caused the termination by signal. So if any shell command terminated by signal the return status must be (128+signal number).

For example:

If any shell command is terminated by SIGINT then $? will give 130 ( 128+2) (Here 2 is signal number for SIGINT, check by using kill -l )

Install .ipa to iPad with or without iTunes

In Xcode 8, with iPhone plugged in, open Window -> Devices. In the left navigation, select the iPhone plugged in. Click on the + symbol under Installed Apps. Navigate to the ipa you want installed. Select and click open to install app.

Change GridView row color based on condition

Create GridView1_RowDataBound event for your GridView.

//Check if it is not header or footer row
if (e.Row.RowType == DataControlRowType.DataRow)
{
    //Check your condition here
    If(Condition True)
    {
        e.Row.BackColor = Drawing.Color.Red // This will make row back color red
    }
}

How to install OpenJDK 11 on Windows?

You can use Amazon Corretto. It is free to use multiplatform, production-ready distribution of the OpenJDK. It comes with long-term support that will include performance enhancements and security fixes. Check the installation instructions here.

You can also check Zulu from Azul.

One more thing I like to highlight here is both Amazon Corretto and Zulu are TCK Compliant. You can see the OpenJDK builds comparison here and here.

How to jquery alert confirm box "yes" & "no"

I won't write your code but what you looking for is something like a jquery dialog

take a look here

jQuery modal-confirmation

$(function() {
    $( "#dialog-confirm" ).dialog({
      resizable: false,
      height:140,
      modal: true,
      buttons: {
        "Delete all items": function() {
          $( this ).dialog( "close" );
        },
        Cancel: function() {
          $( this ).dialog( "close" );
        }
      }
    });
  });

<div id="dialog-confirm" title="Empty the recycle bin?">
  <p>
    <span class="ui-icon ui-icon-alert" style="float:left; margin:0 7px 20px 0;"></span>
    These items will be permanently deleted and cannot be recovered. Are you sure?
  </p>
</div>

Resetting a form in Angular 2 after submit

I'm using reactive forms in angular 4 and this approach works for me:

    this.profileEditForm.reset(this.profileEditForm.value);

see reset the form flags in the Fundamentals doc

Import and insert sql.gz file into database with putty

If you have scp then:

To move your file from local to remote:

$scp /home/user/file.gz user@ipaddress:path/to/file.gz

To move your file from remote to local:

$scp user@ipaddress:path/to/file.gz /home/user/file.gz

To export your mysql file without login in to remote system:

$mysqldump -h ipaddressofremotehost -Pportnumber -u usernameofmysql -p  databasename | gzip -9 > databasename.sql.gz

To import your mysql file withoug login in to remote system:

$gunzip < databasename.sql.gz | mysql -h ipaddressofremotehost -Pportnumber -u usernameofmysql -p

Note: Make sure you have network access to the ipaddress of remote host

To check network access:

$ping ipaddressofremotehost

Return the characters after Nth character in a string

Mid(strYourString, 4) (i.e. without the optional length argument) will return the substring starting from the 4th character and going to the end of the string.

app.config for a class library

Your answer for a non manual creation of an app.config is Visual Studio Project Properties/Settings tab.

When you add a setting and save, your app.config will be created automatically. At this point a bunch of code is generated in a {yourclasslibrary.Properties} namespace containing properties corresponding to your settings. The settings themselves will be placed in the app.config's applicationSettings settings.

 <configSections>
    <sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" >
        <section name="ClassLibrary.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
    </sectionGroup>
</configSections>
<applicationSettings>
    <ClassLibrary.Properties.Settings>
        <setting name="Setting1" serializeAs="String">
            <value>3</value>
        </setting>
    </BookOneGenerator.Properties.Settings>
</applicationSettings>

If you added an Application scoped setting called Setting1 = 3 then a property called Setting1 will be created. These properties are becoming at compilation part of the binary and they are decorated with a DefaultSettingValueAttribute which is set to the value you specified at development time.

     [ApplicationScopedSetting]
    [DebuggerNonUserCode]
    [DefaultSettingValue("3")]
    public string Setting1
    {
        get
        {
            return (string)this["Setting1"];
        }
    }

Thus as in your class library code you make use of these properties if a corresponding setting doesn't exist in the runtime config file, it will fallback to use the default value. That way the application won't crash for lacking a setting entry, which is very confusing first time when you don't know how these things work. Now, you're asking yourself how can specify our own new value in a deployed library and avoid the default setting value be used?

That will happen when we properly configure the executable's app.config. Two steps. 1. we make it aware that we will have a settings section for that class library and 2. with small modifications we paste the class library's config file in the executable config. (there's a method where you can keep the class library config file external and you just reference it from the executable's config.

So, you can have an app.config for a class library but it's useless if you don't integrate it properly with the parent application. See here what I wrote sometime ago: link

Gradle: How to Display Test Results in the Console in Real Time?

Merge of Shubham's great answer and JJD use enum instead of string

tasks.withType(Test) {
   testLogging {
       // set options for log level LIFECYCLE
       events TestLogEvent.PASSED,
            TestLogEvent.SKIPPED, TestLogEvent.FAILED, TestLogEvent.STANDARD_OUT
       showExceptions true
       exceptionFormat TestExceptionFormat.FULL
       showCauses true
       showStackTraces true

    // set options for log level DEBUG and INFO
       debug {
        events TestLogEvent.STARTED, TestLogEvent.PASSED, TestLogEvent.SKIPPED, TestLogEvent.FAILED, TestLogEvent.STANDARD_OUT, TestLogEvent.STANDARD_ERROR
        exceptionFormat TestExceptionFormat.FULL
       }
       info.events = debug.events
       info.exceptionFormat = debug.exceptionFormat

       afterSuite { desc, result ->
           if (!desc.parent) { // will match the outermost suite
               def output = "Results: ${result.resultType} (${result.testCount} tests, ${result.successfulTestCount} successes, ${result.failedTestCount} failures, ${result.skippedTestCount} skipped)"
               def startItem = '|  ', endItem = '  |'
               def repeatLength = startItem.length() + output.length() + endItem.length()
               println('\n' + ('-' * repeatLength) + '\n' + startItem + output + endItem + '\n' + ('-' * repeatLength))
           }
       }
   }
}

Excel VBA select range at last row and column

The simplest modification (to the code in your question) is this:

    Range("A" & Rows.Count).End(xlUp).Select
    Selection.EntireRow.Delete

Which can be simplified to:

    Range("A" & Rows.Count).End(xlUp).EntireRow.Delete

Unix: How to delete files listed in a file

Use this:

while IFS= read -r file ; do rm -- "$file" ; done < delete.list

If you need glob expansion you can omit quoting $file:

IFS=""
while read -r file ; do rm -- $file ; done < delete.list

But be warned that file names can contain "problematic" content and I would use the unquoted version. Imagine this pattern in the file

*
*/*
*/*/*

This would delete quite a lot from the current directory! I would encourage you to prepare the delete list in a way that glob patterns aren't required anymore, and then use quoting like in my first example.

CSS get height of screen resolution

It is not possible to get the height of the screen from CSS. However, using since CSS3 you can use media queries to control the display of the template as per the resolution.

If you want to code on the basis of height using media queries, you can define style-sheet and call it like this.

<link rel="stylesheet" media="screen and (device-height: 600px)" />

What are the best PHP input sanitizing functions?

function sanitize($string,$dbmin,$dbmax){
$string = preg_replace('#[^a-z0-9]#i', '', $string); //useful for strict cleanse, alphanumeric here
$string = mysqli_real_escape_string($con, $string); //get ready for db
if(strlen($string) > $dbmax || strlen($string) < $dbmin){
    echo "reject_this"; exit();
    }
return $string;
}

How to automatically convert strongly typed enum into int?

The C++ committee took one step forward (scoping enums out of global namespace) and fifty steps back (no enum type decay to integer). Sadly, enum class is simply not usable if you need the value of the enum in any non-symbolic way.

The best solution is to not use it at all, and instead scope the enum yourself using a namespace or a struct. For this purpose, they are interchangable. You will need to type a little extra when refering to the enum type itself, but that will likely not be often.

struct TextureUploadFormat {
    enum Type : uint32 {
        r,
        rg,
        rgb,
        rgba,
        __count
    };
};

// must use ::Type, which is the extra typing with this method; beats all the static_cast<>()
uint32 getFormatStride(TextureUploadFormat::Type format){
    const uint32 formatStride[TextureUploadFormat::__count] = {
        1,
        2,
        3,
        4
    };
    return formatStride[format]; // decays without complaint
}

How to get HTTP Response Code using Selenium WebDriver

I was also having same issue and stuck for some days, but after some research i figured out that we can actually use chrome's "--remote-debugging-port" to intercept requests in conjunction with selenium web driver. Use following Pseudocode as a reference:-

create instance of chrome driver with remote debugging

int freePort = findFreePort();

chromeOptions.addArguments("--remote-debugging-port=" + freePort);

ChromeDriver driver = new ChromeDriver(chromeOptions);`

make a get call to http://127.0.0.1:freePort

String response = makeGetCall( "http://127.0.0.1" + freePort  + "/json" );

Extract chrome's webSocket Url to listen, you can see response and figure out how to extract

String webSocketUrl = response.substring(response.indexOf("ws://127.0.0.1"), response.length() - 4);

Connect to this socket, u can use asyncHttp

socket = maketSocketConnection( webSocketUrl );

Enable network capture

socket.send( { "id" : 1, "method" : "Network.enable" } );

Now chrome will send all network related events and captures them as follows

socket.onMessageReceived( String message ){

    Json responseJson = toJson(message);
    if( responseJson.method == "Network.responseReceived" ){
       //extract status code
    }
}

driver.get("http://stackoverflow.com");

you can do everything mentioned in dev tools site. see https://chromedevtools.github.io/devtools-protocol/ Note:- use chromedriver 2.39 or above.

I hope it helps someone.

reference : Using Google Chrome remote debugging protocol

Get Line Number of certain phrase in file Python

You can use list comprehension:

content = open("path/to/file.txt").readlines()

lookup = 'the dog barked'

lines = [line_num for line_num, line_content in enumerate(content) if lookup in line_content]

print(lines)

Rails 3 execute custom sql query without a model

How about this :

@client = TinyTds::Client.new(
      :adapter => 'mysql2',
      :host => 'host',
      :database => 'siteconfig_development',
      :username => 'username',
      :password => 'password'

sql = "SELECT * FROM users"

result = @client.execute(sql)

results.each do |row|
puts row[0]
end

You need to have TinyTds gem installed, since you didn't specify it in your question I didn't use Active Record

fileReader.readAsBinaryString to upload files

Use fileReader.readAsDataURL( fileObject ), this will encode it to base64, which you can safely upload to your server.

How do you detect the clearing of a "search" HTML5 input?

document.querySelectorAll('input[type=search]').forEach(function (input) {
   input.addEventListener('mouseup', function (e) {
                if (input.value.length > 0) {
                    setTimeout(function () {
                        if (input.value.length === 0) {
                            //do reset action here
                        }
                    }, 5);
                }
            });
}

ECMASCRIPT 2016

How to give spacing between buttons using bootstrap

Use btn-primary-spacing class for all buttons remove margin-left class

Example :

<button type="button" class="btn btn-primary btn-color btn-bg-color btn-sm col-xs-2 btn-primary-spacing">
  <span class="glyphicon glyphicon-plus" aria-hidden="true"></span> ADD PACKET
</button>

CSS will be like :

.btn-primary-spacing 
{
margin-right: 5px;
margin-bottom: 5px !important;
}

Pure CSS animation visibility with delay

Unfortunately you can't animate the display property. For a full list of what you can animate, try this CSS animation list by w3 Schools.

If you want to retain it's visual position on the page, you should try animating either it's height (which will still affect the position of other elements), or opacity (how transparent it is). You could even try animating the z-index, which is the position on the z axis (depth), by putting an element over the top of it, and then rearranging what's on top. However, I'd suggest using opacity, as it retains the vertical space where the element is.

I've updated the fiddle to show an example.

Good luck!

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

I experienced the same issue, and found out that the applicationdeployed was of .NET version 3.5, but the Application pool was using .NET 2.0. That caused the problem you described above. Hope it helps someone.

My error:

HTTP Error 500.19 - Internal Server Error
The requested page cannot be accessed because the related configuration data for the page is invalid. Detailed Error Information
Module IIS Web Core 
Notification BeginRequest 
Handler Not yet determined 
Error Code 0x80070021 

Config Error This configuration section cannot be used at this path. This happens when the section is locked at a parent level. Locking is either by default (overrideModeDefault="Deny"), or set explicitly by a location tag with overrideMode="Deny" or the legacy allowOverride="false".  
Config File \\?\C:\inetpub\MyService\web.config 
Requested URL http://localhost:80/MyService.svc 
Physical Path C:\inetpub\DeployService\DeployService.svc 
Logon Method Not yet determined 
Logon User Not yet determined 
 Config Source
101:        </modules>
  102:      <handlers>
  103:          <remove name="WebServiceHandlerFactory-Integrated"/>
HTTP Error 500.19 - Internal Server Error
The requested page cannot be accessed because the related configuration data for the page is invalid. Detailed Error Information
Module IIS Web Core 
Notification BeginRequest 
Handler Not yet determined 
Error Code 0x80070021 
Config Error This configuration section cannot be used at this path. This happens when the section is locked at a parent level. Locking is either by default (overrideModeDefault="Deny"), or set explicitly by a location tag with overrideMode="Deny" or the legacy allowOverride="false".  

Config File \\?\C:\inetpub\DeployService\web.config 
Requested URL http://localhost:80/DeployService.svc 
Physical Path C:\inetpub\DeployService\DeployService.svc 
Logon Method Not yet determined 
Logon User Not yet determined 
 Config Source
  101:      </modules>
  102:      <handlers>
  103:          <remove name="WebServiceHandlerFactory-Integrated"/>`

How to override a JavaScript function

You can override any built-in function by just re-declaring it.

parseFloat = function(a){
  alert(a)
};

Now parseFloat(3) will alert 3.

SLF4J: Class path contains multiple SLF4J bindings

For me the answer was to force a Maven rebuild. In Eclipse:

Right click on project-> Maven -> Disable Maven nature
Right click on project-> Spring Tools > Update Maven Dependencies
Right click on project-> Configure > Convert Maven Project

Simple DatePicker-like Calendar

I'm particularly fond of this date picker built for Mootools: http://electricprism.com/aeron/calendar/

It's lovely right out of the box.

How to change color and font on ListView

use them in Java code like this:

 color = getResources().getColor(R.color.mycolor);

The getResources() method returns the ResourceManager class for the current activity, and getColor() asks the manager to look up a color given a resource ID

How do I consume the JSON POST data in an Express application

A beginner's mistake...i was using app.use(express.json()); in a local module instead of the main file (entry point).

How to add new elements to an array?

Use a List<String>, such as an ArrayList<String>. It's dynamically growable, unlike arrays (see: Effective Java 2nd Edition, Item 25: Prefer lists to arrays).

import java.util.*;
//....

List<String> list = new ArrayList<String>();
list.add("1");
list.add("2");
list.add("3");
System.out.println(list); // prints "[1, 2, 3]"

If you insist on using arrays, you can use java.util.Arrays.copyOf to allocate a bigger array to accomodate the additional element. This is really not the best solution, though.

static <T> T[] append(T[] arr, T element) {
    final int N = arr.length;
    arr = Arrays.copyOf(arr, N + 1);
    arr[N] = element;
    return arr;
}

String[] arr = { "1", "2", "3" };
System.out.println(Arrays.toString(arr)); // prints "[1, 2, 3]"
arr = append(arr, "4");
System.out.println(Arrays.toString(arr)); // prints "[1, 2, 3, 4]"

This is O(N) per append. ArrayList, on the other hand, has O(1) amortized cost per operation.

Could not load file or assembly 'Newtonsoft.Json' or one of its dependencies. Manifest definition does not match the assembly reference

if you're working with some kind of subversion: delete the project and re-download it, it worked for me :S

What is the meaning of the word logits in TensorFlow?

Logits is an overloaded term which can mean many different things:

In Math, Logit is a function that maps probabilities ([0, 1]) to R ((-inf, inf))

Probability of 0.5 corresponds to a logit of 0. Negative logit correspond to probabilities less than 0.5, positive to > 0.5.

In ML, it can be

the vector of raw (non-normalized) predictions that a classification model generates, which is ordinarily then passed to a normalization function. If the model is solving a multi-class classification problem, logits typically become an input to the softmax function. The softmax function then generates a vector of (normalized) probabilities with one value for each possible class.

Logits also sometimes refer to the element-wise inverse of the sigmoid function.

NullPointerException in eclipse in Eclipse itself at PartServiceImpl.internalFixContext

hi,that maybe the project's problem,

chose the project and setting you eclipse:

project -> clean...

$rootScope.$broadcast vs. $scope.$emit

tl;dr (this tl;dr is from @sp00m's answer below)

$emit dispatches an event upwards ... $broadcast dispatches an event downwards

Detailed explanation

$rootScope.$emit only lets other $rootScope listeners catch it. This is good when you don't want every $scope to get it. Mostly a high level communication. Think of it as adults talking to each other in a room so the kids can't hear them.

$rootScope.$broadcast is a method that lets pretty much everything hear it. This would be the equivalent of parents yelling that dinner is ready so everyone in the house hears it.

$scope.$emit is when you want that $scope and all its parents and $rootScope to hear the event. This is a child whining to their parents at home (but not at a grocery store where other kids can hear).

$scope.$broadcast is for the $scope itself and its children. This is a child whispering to its stuffed animals so their parents can't hear.

Using Chrome's Element Inspector in Print Preview Mode?

Chrome v67 (mac):

Hold down Cmd+opt+j to open dev tools
click the ... on the righthand side, and choose: More Tools >> Rendering
When the Rendering window shows up at the bottom of the screen, Emulate CSS Media section and choose: "Screen" from the dropdown.
Go to "File >> Print" and you should see the view you want printing.

Images of the above description for Chrome v67 on a mac:

Where to find the Rendering tab: Click the ... on the righthand side, and choose: More Tools >> Rendering

screenshot 1

How to get the "screen" view to print: When the Rendering window shows up at the bottom of the screen, Emulate CSS Media section and choose: "Screen" from the dropdown.

screenshot 2

Hope it helps.

how to count the total number of lines in a text file using python

if you import pandas then you can use the shape function to determine this. Not sure how it performs. Code is as follows:

import pandas as pd
data=pd.read_csv("yourfile") #reads in your file
num_records=[]               #creates an array 
num_records=data.shape       #assigns the 2 item result from shape to the array
n_records=num_records[0]     #assigns number of lines to n_records

How to import an existing directory into Eclipse?

These days, there's a better solution for importing an existing PHP project. The PDT plugin now has an option on the New PHP Project dialog just for this. So:

From File->New->PHP Project:

New PHP Project Dialog with "Create project at existing location" options badly circled

Programs & Examples On #Acceptance testing

Difference between acceptance test and functional test?

How do I change db schema to dbo

How to redraw DataTable with new data

jQuery.animate() with css class only, without explicit styles

Convert Linq Query Result to Dictionary

How do I get values from a SQL database into textboxes using C#?

Rollback one specific migration in Laravel

Can't operator == be applied to generic types in C#?

Responsive dropdown navbar with angular-ui bootstrap (done in the correct angular kind of way)

CSS @font-face not working in ie

How to get my activity context?

Saving data to a file in C#

Should ol/ul be inside <p> or outside?

How do I select between the 1st day of the current month and current day in MySQL?

Get human readable version of file size?

Simplest way to have a configuration file in a Windows Forms C# application

How to write a test which expects an Error to be thrown in Jasmine?

Using the Jersey client to do a POST operation

m2e error in MavenArchiver.getManifest()

What is the correct "-moz-appearance" value to hide dropdown arrow of a <select> element

Create URL from a String

How to Select Min and Max date values in Linq Query

What about the future of LINQ to SQL?

What should I use to open a url instead of urlopen in urllib3

Disabling contextual LOB creation as createClob() method threw error

Filter values only if not null using lambda in Java8

Manually highlight selected text in Notepad++

Android Starting Service at Boot Time , How to restart service class after device Reboot?

Compare two date formats in javascript/jquery

Count the cells with same color in google spreadsheet

How to convert char* to wchar_t*?

How do I create a Bash alias?

Javascript: Easier way to format numbers?

Does React Native styles support gradients?

How to show full column content in a Spark Dataframe?

history.replaceState() example?

MySQL Workbench Edit Table Data is read only

Difference between IISRESET and IIS Stop-Start command

How can I convert a .jar to an .exe?

powershell - extract file name and extension

Replace non-numeric with empty string

Checking if a folder exists using a .bat file

For a file:

For a directory:

Remove portion of a string after a certain character

Check if string matches pattern

Find a commit on GitHub given the commit hash

how do I strip white space when grabbing text with jQuery?

Remove stubborn underline from link

PHP header redirect 301 - what are the implications?

Fastest JavaScript summation

How to search by key=>value in a multidimensional array in PHP

Jquery function return value

How to run TestNG from command line

How to delete zero components in a vector in Matlab?

How to get a unique computer identifier in Java (like disk ID or motherboard ID)?

Android - R cannot be resolved to a variable

List file names based on a filename pattern and file content?

How to get distinct values from an array of objects in JavaScript?

TypeScript - Append HTML to container element in Angular 2

How to append to a file in Node?

How to make a view with rounded corners?

Force sidebar height 100% using CSS (with a sticky bottom image)?

how do you view macro code in access?

Centering a Twitter Bootstrap button

Handling the TAB character in Java

make sounds (beep) with c++

NSInternalInconsistencyException', reason: 'Could not load NIB in bundle: 'NSBundle

Permission denied error while writing to a file in Python

Apply a theme to an activity in Android?

Convert a Map<String, String> to a POJO

Remove an onclick listener

Is there a method that tells my program to quit?

Reset push notification settings for app

How to add smooth scrolling to Bootstrap's scroll spy function

ResultSet exception - before start of result set

Why can't I push to this bare repository?

Why and how to fix? IIS Express "The specified port is in use"

How to get the first element of an array?

In HTML I can make a checkmark with ✓ . Is there a corresponding X-mark?