#Request.querystring | Programs & Examples on Request.querystring

How do you test your Request.QueryString[] variables?

Below is an extension method that will allow you to write code like this:

int id = request.QueryString.GetValue<int>("id");
DateTime date = request.QueryString.GetValue<DateTime>("date");

It makes use of TypeDescriptor to perform the conversion. Based on your needs, you could add an overload which takes a default value instead of throwing an exception:

public static T GetValue<T>(this NameValueCollection collection, string key)
{
    if(collection == null)
    {
        throw new ArgumentNullException("collection");
    }

    var value = collection[key];

    if(value == null)
    {
        throw new ArgumentOutOfRangeException("key");
    }

    var converter = TypeDescriptor.GetConverter(typeof(T));

    if(!converter.CanConvertFrom(typeof(string)))
    {
        throw new ArgumentException(String.Format("Cannot convert '{0}' to {1}", value, typeof(T)));
    }

    return (T) converter.ConvertFrom(value);
}

how does Request.QueryString work?

Request.QueryString["pID"];

Here Request is a object that retrieves the values that the client browser passed to the server during an HTTP request and QueryString is a collection is used to retrieve the variable values in the HTTP query string.

How to get the browser language using JavaScript

Try this script to get your browser language

_x000D_

<script type="text/javascript">_x000D_
var userLang = navigator.language || navigator.userLanguage; _x000D_
alert ("The language is: " + userLang);_x000D_
</script>

_x000D_

Cheers

Google Chrome Printing Page Breaks

I've used the following approach successfully in all major browsers including Chrome:

<!DOCTYPE html>

<html>
  <head>
    <meta http-equiv="content-type" content="text/html;charset=UTF-8" />
    <title>Paginated HTML</title>
    <style type="text/css" media="print">
      div.page
      {
        page-break-after: always;
        page-break-inside: avoid;
      }
    </style>
  </head>
  <body>
    <div class="page">
      <h1>This is Page 1</h1>
    </div>
    <div class="page">
      <h1>This is Page 2</h1>
    </div>
    <div class="page">
      <h1>This is Page 3</h1>
    </div>
  </body>
</html>

This is a simplified example. In the real code, each page div contains many more elements.

Seconds CountDown Timer

Usage:

CountDownTimer timer = new CountDownTimer();


//set to 30 mins
timer.SetTime(30,0);     

timer.Start();

//update label text
timer.TimeChanged += () => Label1.Text = timer.TimeLeftMsStr; 

// show messageBox on timer = 00:00.000
timer.CountDownFinished += () => MessageBox.Show("Timer finished the work!"); 

//timer step. By default is 1 second
timer.StepMs = 77; // for nice milliseconds time switch

and don't forget to Dispose(); when timer is useless for you;

Source code:

using System;
using System.Diagnostics;
using System.Windows.Forms;

public class CountDownTimer : IDisposable
{
    public Stopwatch _stpWatch = new Stopwatch();

    public Action TimeChanged;
    public Action CountDownFinished;

    public bool IsRunnign => timer.Enabled;

    public int StepMs
    {
        get => timer.Interval;
        set => timer.Interval = value;
    }

    private Timer timer = new Timer();

    private TimeSpan _max = TimeSpan.FromMilliseconds(30000);

    public TimeSpan TimeLeft => (_max.TotalMilliseconds - _stpWatch.ElapsedMilliseconds) > 0 ? TimeSpan.FromMilliseconds(_max.TotalMilliseconds - _stpWatch.ElapsedMilliseconds) : TimeSpan.FromMilliseconds(0);

    private bool _mustStop => (_max.TotalMilliseconds - _stpWatch.ElapsedMilliseconds) < 0;

    public string TimeLeftStr => TimeLeft.ToString(@"\mm\:ss");

    public string TimeLeftMsStr => TimeLeft.ToString(@"mm\:ss\.fff");

    private void TimerTick(object sender, EventArgs e)
    {
        TimeChanged?.Invoke();

        if (_mustStop)
        {
            CountDownFinished?.Invoke();
            _stpWatch.Stop();
            timer.Enabled = false;
        }
    }

    public CountDownTimer(int min, int sec)
    {
        SetTime(min, sec);
        Init();
    }

    public CountDownTimer(TimeSpan ts)
    {
        SetTime(ts);
        Init();
    }

    public CountDownTimer()
    {
        Init();
    }

    private void Init()
    {
        StepMs = 1000;
        timer.Tick += new EventHandler(TimerTick);
    }

    public void SetTime(TimeSpan ts)
    {
        _max = ts;
        TimeChanged?.Invoke();
    }

    public void SetTime(int min, int sec = 0) => SetTime(TimeSpan.FromSeconds(min * 60 + sec));

    public void Start() {
        timer.Start();
        _stpWatch.Start();
    }

    public void Pause()
    {
        timer.Stop();
        _stpWatch.Stop();
    }

    public void Stop()
    {
        Reset();
        Pause();
    }

    public void Reset()
    {
        _stpWatch.Reset();
    }

    public void Restart()
    {
        _stpWatch.Reset();
        timer.Start();
    }

    public void Dispose() => timer.Dispose();
}

(updated 6.6.2020, because of problems with time calculation)

Angular js init ng-model from default values

As others pointed out, it is not good practice to initialize data on views. Initializing data on Controllers, however, is recommended. (see http://docs.angularjs.org/guide/controller)

So you can write

<input name="card[description]" ng-model="card.description">

and

$scope.card = { description: 'Visa-4242' };

$http.get('/getCardInfo.php', function(data) {
   $scope.card = data;
});

This way the views do not contain data, and the controller initializes the value while the real values are being loaded.

"Adaptive Server is unavailable or does not exist" error connecting to SQL Server from PHP

It sounds like you have a problem with your dsn or odbc data source.

Try bypassing the dsn first and connect using:

TDSVER=8.0 tsql -S *serverIPAddress* -U *username* -P *password*

If that works, you know its an issue with your dsn or with freetds using your dsn. Also, it is possible that your tds version is not compatible with your server. You might want to try other TDSVER settings (5.0, 7.0, 7.1).

Return values from the row above to the current row

This formula does not require a column letter reference ("A", "B", etc.). It returns the value of the cell one row above in the same column.

=INDIRECT(ADDRESS(ROW()-1,COLUMN()))

PHP Get all subdirectories of a given directory

you can use glob() with GLOB_ONLYDIR option

$dirs = array_filter(glob('*'), 'is_dir');
print_r( $dirs);

c++ string array initialization

With support for C++11 initializer lists it is very easy:

#include <iostream>
#include <vector>
#include <string>
using namespace std;

using Strings = vector<string>;

void foo( Strings const& strings )
{
    for( string const& s : strings ) { cout << s << endl; }
}

auto main() -> int
{
    foo( Strings{ "hi", "there" } ); 
}

Lacking that (e.g. for Visual C++ 10.0) you can do things like this:

#include <iostream>
#include <vector>
#include <string>
using namespace std;

typedef vector<string> Strings;

void foo( Strings const& strings )
{
    for( auto it = begin( strings );  it != end( strings );  ++it )
    {
        cout << *it << endl;
    }
}

template< class Elem >
vector<Elem>& r( vector<Elem>&& o ) { return o; }

template< class Elem, class Arg >
vector<Elem>& operator<<( vector<Elem>& v, Arg const& a )
{
    v.push_back( a );
    return v;
}

int main()
{
    foo( r( Strings() ) << "hi" << "there" ); 
}

What Content-Type value should I send for my XML sitemap?

Other answers here address the general question of what the proper Content-Type for an XML response is, and conclude (as with What's the difference between text/xml vs application/xml for webservice response) that both text/xml and application/xml are permissible. However, none address whether there are any rules specific to sitemaps.

Answer: there aren't. The sitemap spec is https://www.sitemaps.org, and using Google site: searches you can confirm that it does not contain the words or phrases mime, mimetype, content-type, application/xml, or text/xml anywhere. In other words, it is entirely silent on the topic of what Content-Type should be used for serving sitemaps.

In the absence of any commentary in the sitemap spec directly addressing this question, we can safely assume that the same rules apply as when choosing the Content-Type of any other XML document - i.e. that it may be either text/xml or application/xml.

Changing API level Android Studio

When you want to update your minSdkVersion in an existent project...

Update build.gradle(Module: app) - Make sure is the one under Gradle Script and it is NOT build.gradle(Project: yourproject).

An example of build.gradle:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    buildToolsVersion "28.0.2"

    defaultConfig {
        applicationId "com.stackoverflow.answer"
        minSdkVersion 21
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}

dependencies {
    androidTestCompile 'junit:junit:4.12'
    compile fileTree(dir: 'libs', include: ['*.jar'])
}

Sync gradle button (refresh all gradle projects also works)

For beginners in Android Studio "Sync gradle button" is located in Tools -> Android -> Sync Project with Gradle Files "Rebuild project" Build -> Rebuild Project

Rebuild project

After updating the build.gradle's minSdkVersion, you have to click on the button to sync gradle file ("Sync Project with Gradle files"). That will clear the marker.

Updating manifest.xml, for e.g. deleting any references to SDK levels in the manifest file, is NOT necessary anymore in Android Studio.

MySQL Error 1093 - Can't specify target table for update in FROM clause

You could insert the desired rows' ids into a temp table and then delete all the rows that are found in that table.

which may be what @Cheekysoft meant by doing it in two steps.

ssh "permissions are too open" error

Putty can do the work on windows 10. It generates a public key using a private key as input.

download putty from https://www.putty.org/
install putty. Two applications come upon the installation: putty config, putty key gen
launch puttyGen
click load and select a private key file. Please note, you need to rename your private key file with .ppk extension,e.g private-key.ppk

How to read Excel cell having Date with Apache POI?

Yes, I understood your problem. If is difficult to identify cell has Numeric or Data value.

If you want data in format that shows in Excel, you just need to format cell using DataFormatter class.

DataFormatter dataFormatter = new DataFormatter();
String cellStringValue = dataFormatter.formatCellValue(row.getCell(0));
System.out.println ("Is shows data as show in Excel file" + cellStringValue);  // Here it automcatically format data based on that cell format.
// No need for extra efforts

How to Navigate from one View Controller to another using Swift

In swift 4.0

var viewController: UIViewController? = storyboard().instantiateViewController(withIdentifier: "Identifier")
var navi = UINavigationController(rootViewController: viewController!)
navigationController?.pushViewController(navi, animated: true)

Oracle "(+)" Operator

In practice, the + symbol is placed directly in the conditional statement and on the side of the optional table (the one which is allowed to contain empty or null values within the conditional).

How to export a Hive table into a CSV file?

The problem solutions are fine but I found some problems in both:

As Carter Shanklin said, with this command we will obtain a csv file with the results of the query in the path specified:
```
insert overwrite local directory '/home/carter/staging' row format delimited fields terminated by ',' select * from hugetable;
```
The problem with this solution is that the csv obtained won´t have headers and will create a file that is not a CSV (so we have to rename it).
As user1922900 said, with the following command we will obtain a CSV files with the results of the query in the specified file and with headers:
```
hive -e 'select * from some_table' | sed 's/[\t]/,/g' > /home/yourfile.csv
```
With this solution we will get a CSV file with the result rows of our query, but with log messages between these rows too. As a solution of this problem I tried this, but without results.

So, to solve all these issues I created a script that execute a list of queries, create a folder (with a timestamp) where it stores the results, rename the files obtained, remove the unnecesay files and it also add the respective headers.

 #!/bin/sh
 QUERIES=("select * from table1" "select * from table2")
 IFS=""
 directoryname=$(echo "ScriptResults$timestamp")
 mkdir $directoryname 
 counter=1 
for query in ${QUERIES[*]}
 do 
     tablename="query"$counter 
     hive -S -e "INSERT OVERWRITE LOCAL DIRECTORY '/data/2/DOMAIN_USERS/SANUK/users/$USER/$tablename' ROW FORMAT DELIMITED FIELDS TERMINATED BY ',' $query ;"
     hive -S -e "set hive.cli.print.header=true; $query limit 1" | head -1 | sed 's/[\t]/,/g' >> /data/2/DOMAIN_USERS/SANUK/users/$USER/$tablename/header.csv
     mv $tablename/000000_0 $tablename/$tablename.csv
     cat $tablename/$tablename.csv >> $tablename/header.csv.
     rm $tablename/$tablename.csv
     mv $tablename/header.csv $tablename/$tablename.csv 
     mv $tablename/$tablename.csv $directoryname
     counter=$((counter+1))
     rm -rf $tablename/ 
 done

How to create a simple checkbox in iOS?

On iOS there is the switch UI component instead of a checkbox, look into the UISwitch class. The property on (boolean) can be used to determine the state of the slider and about the saving of its state: That depends on how you save your other stuff already, its just saving a boolean value.

How to vertically center <div> inside the parent element with CSS?

I needed to specify min-height

#login
    display: flex
    align-items: center
    justify-content: center
    min-height: 16em

Get client IP address via third party web service

This pulls back client info as well.

var get = function(u){
    var x = new XMLHttpRequest;
    x.open('GET', u, false);
    x.send();
    return x.responseText;
}

JSON.parse(get('http://ifconfig.me/all.json'))

Making a UITableView scroll when text field is selected

This works perfectly, and on iPad too.

- (BOOL)textFieldShouldReturn:(UITextField *)textField 
{

    if(textField == textfield1){
            [accountName1TextField becomeFirstResponder];
        }else if(textField == textfield2){
            [self.tableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:1] atScrollPosition:UITableViewScrollPositionTop animated:YES];
            [textfield3 becomeFirstResponder];

        }else if(textField == textfield3){
            [self.tableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:1 inSection:1] atScrollPosition:UITableViewScrollPositionTop animated:YES];
            [textfield4 becomeFirstResponder];

        }else if(textField == textfield4){
            [self.tableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:2 inSection:1] atScrollPosition:UITableViewScrollPositionTop animated:YES];
            [textfield5 becomeFirstResponder];

        }else if(textField == textfield5){
            [self.tableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:3 inSection:1] atScrollPosition:UITableViewScrollPositionTop animated:YES];
            [textfield6 becomeFirstResponder];

        }else if(textField == textfield6){
            [self.tableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:4 inSection:1] atScrollPosition:UITableViewScrollPositionTop animated:YES];
            [textfield7 becomeFirstResponder];

        }else if(textField == textfield7){
            [self.tableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:5 inSection:1] atScrollPosition:UITableViewScrollPositionTop animated:YES];
            [textfield8 becomeFirstResponder];

        }else if(textField == textfield8){
            [self.tableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:6 inSection:1] atScrollPosition:UITableViewScrollPositionTop animated:YES];
            [textfield9 becomeFirstResponder];

        }else if(textField == textfield9){
            [self.tableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:7 inSection:1] atScrollPosition:UITableViewScrollPositionTop animated:YES];
            [textField resignFirstResponder];
        }

Can I animate absolute positioned element with CSS transition?

try this:

.test {
    position:absolute;
    background:blue;
    width:200px;
    height:200px;
    top:40px;
    transition:left 1s linear;
    left: 0;
}

PHP ini file_get_contents external url

The answers provided above solve the problem but don't explain the strange behaviour the OP described. This explanation should help anyone testing communication between sites in a development environment where these sites all reside on the same host (and the same virtualhost; I'm working with apache 2.4 and php7.0).

There's a subtlety with file_get_contents() I came across that is absolutely relevant here but unaddressed (probably because it's either barely documented or not documented from what I can tell or is documented in an obscure php security model whitepaper I can't find).

With allow_url_fopen set to Off in all relevant contexts (e.g. /etc/php/7.0/apache2/php.ini, /etc/php/7.0/fpm/php.ini, etc...) and allow_url_fopen set to On in the command line context (i.e. /etc/php/7.0/cli/php.ini), calls to file_get_contents() for a local resource will be allowed and no warning will be logged such as:

file_get_contents('php://input');

// Path outside document root that webserver user agent has permission to read. e.g. for an apache2 webserver this user agent might be www-data so a file at /etc/php/7.0/filetoaccess would be successfully read if www-data had permission to read this file
file_get_contents('<file path to file on local machine user agent can access>');

// Relative path in same document root
file_get_contents('data/filename.dat')

To conclude, the restriction allow_url_fopen = Off is analogous to an iptables rule in the OUTPUT chain, where the restriction is only applied when an attempt to "exit the system" or "change contexts" is made.

N.B. allow_url_fopen set to On in the command line context (i.e. /etc/php/7.0/cli/php.ini) is what I had on my system but I suspect it would have no bearing on the explanation I provided even if it were set to Off unless of course you're testing by running your scripts from the command line itself. I did not test the behaviour with allow_url_fopen set to Off in the command line context.

PHP Checking if the current date is before or after a set date

I have used this one and it served the purpose:

if($date < date("Y-m-d") ) {
                echo "Date is in the past";}

Do not want scientific notation on plot axis

You can use format or formatC to, ahem, format your axis labels.

For whole numbers, try

x <- 10 ^ (1:10)
format(x, scientific = FALSE)
formatC(x, digits = 0, format = "f")

If the numbers are convertable to actual integers (i.e., not too big), you can also use

formatC(x, format = "d")

How you get the labels onto your axis depends upon the plotting system that you are using.

How to fix getImageData() error The canvas has been tainted by cross-origin data?

As others have said you are "tainting" the canvas by loading from a cross origins domain.

https://developer.mozilla.org/en-US/docs/HTML/CORS_Enabled_Image

However, you may be able to prevent this by simply setting:

img.crossOrigin = "Anonymous";

This only works if the remote server sets the following header appropriately:

Access-Control-Allow-Origin "*"

The Dropbox file chooser when using the "direct link" option is a great example of this. I use it on oddprints.com to hoover up images from the remote dropbox image url, into my canvas, and then submit the image data back into my server. All in javascript

Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.12:test (default-test) on project.

This solved my issue. It was 2.10 in my POM, just updated to 2.19.1 and refresh the POM

Add to your pom :

 <plugins>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.19.1</version>
        </plugin>
  </plugins>

In your error code he didn't find surefire plugin so add it

Spring .properties file: get element as an Array

If you define your array in properties file like:

base.module.elementToSearch=1,2,3,4,5,6

You can load such array in your Java class like this:

  @Value("${base.module.elementToSearch}")
  private String[] elementToSearch;

What are the rules about using an underscore in a C++ identifier?

Yes, underscores may be used anywhere in an identifier. I believe the rules are: any of a-z, A-Z, _ in the first character and those +0-9 for the following characters.

Underscore prefixes are common in C code -- a single underscore means "private", and double underscores are usually reserved for use by the compiler.

Rename MySQL database

I used following method to rename the database

take backup of the file using mysqldump or any DB tool eg heidiSQL,mysql administrator etc
Open back up (eg backupfile.sql) file in some text editor.
Search and replace the database name and save file.
Restore the edited SQL file

OpenCV Python rotate image by X degrees around specific point

Or much easier use SciPy

from scipy import ndimage

#rotation angle in degree
rotated = ndimage.rotate(image_to_rotate, 45)

see here for more usage info.

Ruby optional parameters

It is possible :) Just change definition

def ldap_get ( base_dn, filter, scope=LDAP::LDAP_SCOPE_SUBTREE, attrs=nil )

def ldap_get ( base_dn, filter, *param_array, attrs=nil )
scope = param_array.first || LDAP::LDAP_SCOPE_SUBTREE

scope will be now in array on its first place. When you provide 3 arguments, then you will have assigned base_dn, filter and attrs and param_array will be [] When 4 and more arguments then param_array will be [argument1, or_more, and_more]

Downside is... it is unclear solution, really ugly. This is to answer that it is possible to ommit argument in the middle of function call in ruby :)

Another thing you have to do is to rewrite default value of scope.

add a temporary column with a value

You mean staticly define a value, like this:

SELECT field1, 
       field2,
       'example' AS newfield
  FROM TABLE1

This will add a column called "newfield" to the output, and its value will always be "example".

how to check if item is selected from a comboBox in C#

if (comboBox1.SelectedIndex == -1)
{
    //Done
}

It Works,, Try it

My kubernetes pods keep crashing with "CrashLoopBackOff" but I can't find any log

i solved this problem by removing space between quotes and command value inside of array ,this is happened because container exited after started and no executable command present which to be run inside of container.

['sh', '-c', 'echo Hello Kubernetes! && sleep 3600']

Error:Unknown host services.gradle.org. You may need to adjust the proxy settings in Gradle

make sure that you disable the proxy setting. settting > apperance and behaviour > Http Proxy > and select no proxy check box and check the connection after you select no proxy or auto detect proxy setting > the apply ok

How to store Java Date to Mysql datetime with JPA

Use the following code to insert the date into MySQL. Instead of changing our date's format to meet MySql's requirement, we can help data base to recognize our date by setting the STR_TO_DATE(?, '%l:%i %p') parameters.

For example, 2014-03-12 can be represented as STR_TO_DATE('2014-03-12', '%Y-%m-%d')

preparedStatement = connect.prepareStatement("INSERT INTO test.msft VALUES (default, STR_TO_DATE( ?, '%m/%d/%Y'), STR_TO_DATE(?, '%l:%i %p'),?,?,?,?,?)");

Time in milliseconds in C

From man clock:

The clock() function returns an approximation of processor time used by the program.

So there is no indication you should treat it as milliseconds. Some standards require precise value of CLOCKS_PER_SEC, so you could rely on it, but I don't think it is advisable. Second thing is that, as @unwind stated, it is not float/double. Man times suggests that will be an int. Also note that:

this function will return the same value approximately every 72 minutes

And if you are unlucky you might hit the moment it is just about to start counting from zero, thus getting negative or huge value (depending on whether you store the result as signed or unsigned value).

This:

printf("\n\n%6.3f", stop);

Will most probably print garbage as treating any int as float is really not defined behaviour (and I think this is where most of your problem comes). If you want to make sure you can always do:

printf("\n\n%6.3f", (double) stop);

Though I would rather go for printing it as long long int at first:

printf("\n\n%lldf", (long long int) stop);

background: fixed no repeat not working on mobile

I think that mobile devices dont work with fixed positions. You should try with some js plugin like skrollr.js (for example). With this kind of plugin you can select the position of your div (or whatever) in function of scrollbar position.

Highlight text similar to grep, but don't filter out text

You can make sure that all lines match but there is nothing to highlight on irrelevant matches

egrep --color 'apple|' test.txt

Notes:

egrep may be spelled also grep -E
--color is usually default in most distributions
some variants of grep will "optimize" the empty match, so you might want to use "apple|$" instead (see: https://stackoverflow.com/a/13979036/939457)

Defining custom attrs

The answer above covers everything in great detail, apart from a couple of things.

First, if there are no styles, then the (Context context, AttributeSet attrs) method signature will be used to instantiate the preference. In this case just use context.obtainStyledAttributes(attrs, R.styleable.MyCustomView) to get the TypedArray.

Secondly it does not cover how to deal with plaurals resources (quantity strings). These cannot be dealt with using TypedArray. Here is a code snippet from my SeekBarPreference that sets the summary of the preference formatting its value according to the value of the preference. If the xml for the preference sets android:summary to a text string or a string resouce the value of the preference is formatted into the string (it should have %d in it, to pick up the value). If android:summary is set to a plaurals resource, then that is used to format the result.

// Use your own name space if not using an android resource.
final static private String ANDROID_NS = 
    "http://schemas.android.com/apk/res/android";
private int pluralResource;
private Resources resources;
private String summary;

public SeekBarPreference(Context context, AttributeSet attrs) {
    // ...
    TypedArray attributes = context.obtainStyledAttributes(
        attrs, R.styleable.SeekBarPreference);
    pluralResource =  attrs.getAttributeResourceValue(ANDROID_NS, "summary", 0);
    if (pluralResource !=  0) {
        if (! resources.getResourceTypeName(pluralResource).equals("plurals")) {
            pluralResource = 0;
        }
    }
    if (pluralResource ==  0) {
        summary = attributes.getString(
            R.styleable.SeekBarPreference_android_summary);
    }
    attributes.recycle();
}

@Override
public CharSequence getSummary() {
    int value = getPersistedInt(defaultValue);
    if (pluralResource != 0) {
        return resources.getQuantityString(pluralResource, value, value);
    }
    return (summary == null) ? null : String.format(summary, value);
}

This is just given as an example, however, if you want are tempted to set the summary on the preference screen, then you need to call notifyChanged() in the preference's onDialogClosed method.

What does "res.render" do, and what does the html file look like?

Renders a view and sends the rendered HTML string to the client.

res.render('index');

res.render('index', function(err, html) {
  if(err) {...}
  res.send(html);
});

DOCS HERE: https://expressjs.com/en/api.html#res.render

How could I create a list in c++?

You should really use the standard List class. Unless, of course, this is a homework question, or you want to know how lists are implemented by STL.

You'll find plenty of simple tutorials via google, like this one. If you want to know how linked lists work "under the hood", try searching for C list examples/tutorials rather than C++.

Bulk Insert Correctly Quoted CSV File in SQL Server

Per CSV format specification, I don't think it matters if data is correctly quoted or not, as long as it adheres to specification. Excessive quotes should be handled by the parser, if it's properly implemented. FIELDTERMINATOR should be comma and ROWTERMINATOR is line end - this denotes a standard CSV file. Did you try to import your data with these settings?

Spring MVC: How to perform validation?

Find complete example of Spring Mvc Validation

import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;
import com.technicalkeeda.bean.Login;

public class LoginValidator implements Validator {
    public boolean supports(Class aClass) {
        return Login.class.equals(aClass);
    }

    public void validate(Object obj, Errors errors) {
        Login login = (Login) obj;
        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "userName",
                "username.required", "Required field");
        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "userPassword",
                "userpassword.required", "Required field");
    }
}


public class LoginController extends SimpleFormController {
    private LoginService loginService;

    public LoginController() {
        setCommandClass(Login.class);
        setCommandName("login");
    }

    public void setLoginService(LoginService loginService) {
        this.loginService = loginService;
    }

    @Override
    protected ModelAndView onSubmit(Object command) throws Exception {
        Login login = (Login) command;
        loginService.add(login);
        return new ModelAndView("loginsucess", "login", login);
    }
}

Do on-demand Mac OS X cloud services exist, comparable to Amazon's EC2 on-demand instances?

Amazon EC2 cannot offer Mac OS X EC2 instances due to Apple's tight licensing to only allow it to legally run on Apple hardware and the current EC2 infrastructure relies upon virtualized hardware.

Apple Mac image on Amazon EC2?

Can you run OS X on an Amazon EC2 instance?

There are other companies that do provide Mac OS X hosting, presumably on Apple hardware. One example is Go Daddy:

Go Daddy Product Catalog (see Mac® Powered Cloud Servers under Web Hosting)

To find more, search for "Mac OS X hosting" and you'll find more options.

C# static class why use?

If a class is declared as static then the variables and methods need to be declared as static.

A class can be declared static, indicating that it contains only static members. It is not possible to create instances of a static class using the new keyword. Static classes are loaded automatically by the .NET Framework common language runtime (CLR) when the program or namespace containing the class is loaded.

Use a static class to contain methods that are not associated with a particular object. For example, it is a common requirement to create a set of methods that do not act on instance data and are not associated to a specific object in your code. You could use a static class to hold those methods.

->The main features of a static class are:

They only contain static members.
They cannot be instantiated.
They are sealed.
They cannot contain Instance Constructors or simply constructors as we know that they are associated with objects and operates on data when an object is created.

Example

static class CollegeRegistration
{
  //All static member variables
   static int nCollegeId; //College Id will be same for all the students studying
   static string sCollegeName; //Name will be same
   static string sColegeAddress; //Address of the college will also same

    //Member functions
   public static int GetCollegeId()
   {
     nCollegeId = 100;
     return (nCollegeID);
   }
    //similarly implementation of others also.
} //class end


public class student
{
    int nRollNo;
    string sName;

    public GetRollNo()
    {
       nRollNo += 1;
       return (nRollNo);
    }
    //similarly ....
    public static void Main()
   {
     //Not required.
     //CollegeRegistration objCollReg= new CollegeRegistration();

     //<ClassName>.<MethodName>
     int cid= CollegeRegistration.GetCollegeId();
    string sname= CollegeRegistration.GetCollegeName();


   } //Main end
}

How can I set the default timezone in node.js?

I know this thread is very old, but i think this would help anyone that landed here from google like me.

In GAE Flex (NodeJs), you could set the enviroment variable TZ (the one that manages all date timezones in the app) in the app.yaml file, i leave you here an example:

app.yaml

# [START env]
env_variables:
  # Timezone
  TZ: America/Argentina/Buenos_Aires

Twitter API - Display all tweets with a certain hashtag?

UPDATE for v1.1:

Rather than giving q="search_string" give it q="hashtag" in URL encoded form to return results with HASHTAG ONLY. So your query would become:

    GET https://api.twitter.com/1.1/search/tweets.json?q=%23freebandnames

%23 is URL encoded form of #. Try the link out in your browser and it should work.

You can optimize the query by adding since_id and max_id parameters detailed here. Hope this helps !

Note: Search API is now a OAUTH authenticated call, so please include your access_tokens to the above call

Updated

Twitter Search doc link: https://developer.twitter.com/en/docs/tweets/search/api-reference/get-search-tweets.html

C++ convert string to hexadecimal and vice versa

I think there is a much simpler and more elegant solution. Some of the above-mentioned methods may even throw unhandled exceptions in some cases. Here is a fool-proof (as in never goes wrong) and very fast code. Just try it and compare the results in terms of speed and compactness:

#include <string>

// Convert string of chars to its representative string of hex numbers
void stream2hex(const std::string str, std::string& hexstr, bool capital = false)
{
    hexstr.resize(str.size() * 2);
    const size_t a = capital ? 'A' - 1 : 'a' - 1;

    for (size_t i = 0, c = str[0] & 0xFF; i < hexstr.size(); c = str[i / 2] & 0xFF)
    {
        hexstr[i++] = c > 0x9F ? (c / 16 - 9) | a : c / 16 | '0';
        hexstr[i++] = (c & 0xF) > 9 ? (c % 16 - 9) | a : c % 16 | '0';
    }
}

// Convert string of hex numbers to its equivalent char-stream
void hex2stream(const std::string hexstr, std::string& str)
{
    str.resize((hexstr.size() + 1) / 2);

    for (size_t i = 0, j = 0; i < str.size(); i++, j++)
    {
        str[i] = (hexstr[j] & '@' ? hexstr[j] + 9 : hexstr[j]) << 4, j++;
        str[i] |= (hexstr[j] & '@' ? hexstr[j] + 9 : hexstr[j]) & 0xF;
    }
}

Test the code:

#include <iostream>
int main()
{
    std::string s = "Hello World!";
    std::cout << "original string: " << s << '\n';
    stream2hex(s, s);
    std::cout << "hex format: " << s << '\n';
    hex2stream(s, s);
    std::cout << "original one: " << s << '\n';
}

and the result is:

original string: Hello World!
hex format: 48656C6C6F20576F726C6421
original one: Hello World!

Which encoding opens CSV files correctly with Excel on both Mac and Windows?

Here's the clincher on importing utf8-encoded CSV into Excel 2011 for Mac: Microsoft says: "Excel for Mac does not currently support UTF-8." Excel for Mac 2011 and UTF-8

Yay, way to go MS!

Set padding for UITextField with UITextBorderStyleNone

Swift version:

extension UITextField {
    @IBInspectable var padding_left: CGFloat {
        get {
            LF.log("WARNING no getter for UITextField.padding_left")
            return 0
        }
        set (f) {
            layer.sublayerTransform = CATransform3DMakeTranslation(f, 0, 0)
        }
    }
}

So that you can assign value in IB

IBInspectable setting represented in Interface Builder

Can you get the column names from a SqlDataReader?

There is a GetName function on the SqlDataReader which accepts the column index and returns the name of the column.

Conversely, there is a GetOrdinal which takes in a column name and returns the column index.

Can I style an image's ALT text with CSS?

Sure you can!

http://jsfiddle.net/VfTGW/

I do this as a fallback for header logo images, I think some versions of IE will not abide. Edit: Or Chrome apparently - I don't even see alt text in the demo(?). Firefox works well however.

_x000D_

img {_x000D_
  color: green;_x000D_
  font: 40px Impact;_x000D_
}

_x000D_

<img src="404" alt="Alt Text">

_x000D_

Changing the text on a label

There are many ways to tackle a problem like this. There are many ways to do this. I'm going to give you the most simple solution to this question I know. When changing the text of a label or any kind of wiget really. I would do it like this.

Name_Of_Label["text"] = "Your New Text"

So when I apply this knowledge to your code. It would look something like this.

from tkinter import*

class MyGUI:
   def __init__(self):
    self.__mainWindow = Tk()
    #self.fram1 = Frame(self.__mainWindow)
    self.labelText = 'Enter amount to deposit'
    self.depositLabel = Label(self.__mainWindow, text = self.labelText)
    self.depositEntry = Entry(self.__mainWindow, width = 10)
    self.depositEntry.bind('<Return>', self.depositCallBack)
    self.depositLabel.pack()
    self.depositEntry.pack()

    mainloop()

  def depositCallBack(self,event):
    self.labelText["text"] = 'change the value'
    print(self.labelText)

myGUI = MyGUI()

If this helps please let me know!

How to Round to the nearest whole number in C#

See the official documentation for more. For example:

Basically you give the Math.Round method three parameters.

The value you want to round.
The number of decimals you want to keep after the value.
An optional parameter you can invoke to use AwayFromZero rounding. (ignored unless rounding is ambiguous, e.g. 1.5)

Sample code:

var roundedA = Math.Round(1.1, 0); // Output: 1
var roundedB = Math.Round(1.5, 0, MidpointRounding.AwayFromZero); // Output: 2
var roundedC = Math.Round(1.9, 0); // Output: 2
var roundedD = Math.Round(2.5, 0); // Output: 2
var roundedE = Math.Round(2.5, 0, MidpointRounding.AwayFromZero); // Output: 3
var roundedF = Math.Round(3.49, 0, MidpointRounding.AwayFromZero); // Output: 3

Live Demo

You need MidpointRounding.AwayFromZero if you want a .5 value to be rounded up. Unfortunately this isn't the default behavior for Math.Round(). If using MidpointRounding.ToEven (the default) the value is rounded to the nearest even number (1.5 is rounded to 2, but 2.5 is also rounded to 2).

Scala how can I count the number of occurrences in a list

using cats

import cats.implicits._

"Alphabet".toLowerCase().map(c => Map(c -> 1)).toList.combineAll
"Alphabet".toLowerCase().map(c => Map(c -> 1)).toList.foldMap(identity)

Open text file and program shortcut in a Windows batch file

This would have worked too. The first quoted pair are interpreted as a window title name in the start command.

start "" "myfile.txt"
start "" "myshortcut.lnk"

Getting Keyboard Input

You can use Scanner class

To Read from Keyboard (Standard Input) You can use Scanner is a class in java.util package.

Scanner package used for obtaining the input of the primitive types like int, double etc. and strings. It is the easiest way to read input in a Java program, though not very efficient.

To create an object of Scanner class, we usually pass the predefined object System.in, which represents the standard input stream (Keyboard).

For example, this code allows a user to read a number from System.in:

Scanner sc = new Scanner(System.in);
     int i = sc.nextInt();

Some Public methods in Scanner class.

hasNext() Returns true if this scanner has another token in its input.
nextInt() Scans the next token of the input as an int.
nextFloat() Scans the next token of the input as a float.
nextLine() Advances this scanner past the current line and returns the input that was skipped.
nextDouble() Scans the next token of the input as a double.
close() Closes this scanner.

For more details of Public methods in Scanner class.

Example:-

import java.util.Scanner;                      //importing class

class ScannerTest {
  public static void main(String args[]) {
    Scanner sc = new Scanner(System.in);       // Scanner object

    System.out.println("Enter your rollno");
    int rollno = sc.nextInt();
    System.out.println("Enter your name");
    String name = sc.next();
    System.out.println("Enter your fee");
    double fee = sc.nextDouble();
    System.out.println("Rollno:" + rollno + " name:" + name + " fee:" + fee);
    sc.close();                              // closing object
  }
}

Android checkbox style

The correct way to do it for Material design is :

Style :

<style name="MyCheckBox" parent="Theme.AppCompat.Light">  
    <item name="colorControlNormal">@color/foo</item>
    <item name="colorControlActivated">@color/bar</item>
</style>

Layout :

<CheckBox  
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:checked="true"
    android:text="Check Box"
    android:theme="@style/MyCheckBox"/>

It will preserve Material animations on Lollipop+.

Else clause on Python while statement

The else: statement is executed when and only when the while loop no longer meets its condition (in your example, when n != 0 is false).

So the output would be this:

5
4
3
2
1
what the...

How to convert any date format to yyyy-MM-dd

You can change your Date Format From dd/MM/yyyy to yyyy-MM-dd in following way:

string date = DateTime.ParseExact(SourceDate, "dd/MM/yyyy", CultureInfo.InvariantCulture).ToString("yyyy-MM-dd");

Here, SourceDate is variable in which you will get selected date.

How to resolve Nodejs: Error: ENOENT: no such file or directory

Its happened with me. I deletes some css files by mistake and then copied back. This error appeared at that time. So i restart all my dockers and other servers and then it went away, Perhaps this help some one :)

Find records with a date field in the last 24 hours

SELECT * FROM news WHERE date > DATEADD(d,-1,GETDATE())

Rails 3 check if attribute changed

ActiveModel::Dirty didn't work for me because the @model.update_attributes() hid the changes. So this is how I detected changes it in an update method in a controller:

def update
  @model = Model.find(params[:id])
  detect_changes

  if @model.update_attributes(params[:model])
    do_stuff if attr_changed?
  end
end

private

def detect_changes
  @changed = []
  @changed << :attr if @model.attr != params[:model][:attr]
end

def attr_changed?
  @changed.include :attr
end

If you're trying to detect a lot of attribute changes it could get messy though. Probably shouldn't do this in a controller, but meh.

java.text.ParseException: Unparseable date

I needed to add a ParsePosition expression to the parse method of class SimpleDateFormat:

simpledateformat.parse(mydatestring, new ParsePosition(0));

Experimental decorators warning in TypeScript compilation

If you using Deno JavaScript and TypeScript runtime and you enable experimentalDecorators:true in tsconfig.json or the VSCode ide settings. It will not work. According to Deno requirement, you need to provide tsconfig as a flag when running a Deno file. See Custom TypeScript Compiler Options

In my particular case I was running a Deno test and used.

$ deno test -c tsconfig.json

If it is a file, you have something like

 $ deno run -c tsconfig.json mod.ts

my tsconfig.json

{
  "compilerOptions": {
    "allowJs": true,
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    "module": "esnext"
  }
}

How to Generate Barcode using PHP and Display it as an Image on the same page

There is a library for this BarCode PHP. You just need to include a few files:

require_once('class/BCGFontFile.php');
require_once('class/BCGColor.php');
require_once('class/BCGDrawing.php');

You can generate many types of barcodes, namely 1D or 2D. Add the required library:

require_once('class/BCGcode39.barcode.php');

Generate the colours:

// The arguments are R, G, and B for color.
$colorFront = new BCGColor(0, 0, 0);
$colorBack = new BCGColor(255, 255, 255);

After you have added all the codes, you will get this way:

Example

Since several have asked for an example here is what I was able to do to get it done

require_once('class/BCGFontFile.php');
require_once('class/BCGColor.php');
require_once('class/BCGDrawing.php');

require_once('class/BCGcode128.barcode.php');

header('Content-Type: image/png');

$color_white = new BCGColor(255, 255, 255);

$code = new BCGcode128();
$code->parse('HELLO');

$drawing = new BCGDrawing('', $color_white);
$drawing->setBarcode($code);

$drawing->draw();
$drawing->finish(BCGDrawing::IMG_FORMAT_PNG);

If you want to actually create the image file so you can save it then change

$drawing = new BCGDrawing('', $color_white);

$drawing = new BCGDrawing('image.png', $color_white);

Return array from function

Your BlockID function uses the undefined variable images, which will lead to an error. Also, you should not use an Array here - JavaScripts key-value-maps are plain objects:

function BlockID() {
    return {
        "s": "Images/Block_01.png",
        "g": "Images/Block_02.png",
        "C": "Images/Block_03.png",
        "d": "Images/Block_04.png"
    };
}

How do I clone a Django model instance object and save it to the database?

I've run into a couple gotchas with the accepted answer. Here is my solution.

import copy

def clone(instance):
    cloned = copy.copy(instance) # don't alter original instance
    cloned.pk = None
    try:
        delattr(cloned, '_prefetched_objects_cache')
    except AttributeError:
        pass
    return cloned

Note: this uses solutions that aren't officially sanctioned in the Django docs, and they may cease to work in future versions. I tested this in 1.9.13.

The first improvement is that it allows you to continue using the original instance, by using copy.copy. Even if you don't intend to reuse the instance, it can be safer to do this step if the instance you're cloning was passed as an argument to a function. If not, the caller will unexpectedly have a different instance when the function returns.

copy.copy seems to produce a shallow copy of a Django model instance in the desired way. This is one of the things I did not find documented, but it works by pickling and unpickling, so it's probably well-supported.

Secondly, the approved answer will leave any prefetched results attached to the new instance. Those results shouldn't be associated with the new instance, unless you explicitly copy the to-many relationships. If you traverse the the prefetched relationships, you will get results that don't match the database. Breaking working code when you add a prefetch can be a nasty surprise.

Deleting _prefetched_objects_cache is a quick-and-dirty way to strip away all prefetches. Subsequent to-many accesses work as if there never was a prefetch. Using an undocumented property that begins with an underscore is probably asking for compatibility trouble, but it works for now.

How to set focus on a view when a layout is created and displayed?

Try

comp.requestFocusInWindow();

How to convert Base64 String to javascript file object like as from file input form?

I had a very similar requirement (importing a base64 encoded image from an external xml import file. After using xml2json-light library to convert to a json object, I was able to leverage insight from cuixiping's answer above to convert the incoming b64 encoded image to a file object.

const imgName = incomingImage['FileName'];
const imgExt = imgName.split('.').pop();
let mimeType = 'image/png';
if (imgExt.toLowerCase() !== 'png') {
    mimeType = 'image/jpeg';
}
const imgB64 = incomingImage['_@ttribute'];
const bstr = atob(imgB64);
let n = bstr.length;
const u8arr = new Uint8Array(n);
while (n--) {
  u8arr[n] = bstr.charCodeAt(n);
}
const file = new File([u8arr], imgName, {type: mimeType});

My incoming json object had two properties after conversion by xml2json-light: FileName and _@ttribute (which was b64 image data contained in the body of the incoming element.) I needed to generate the mime-type based on the incoming FileName extension. Once I had all the pieces extracted/referenced from the json object, it was a simple task (using cuixiping's supplied code reference) to generate the new File object which was completely compatible with my existing classes that expected a file object generated from the browser element.

Hope this helps connects the dots for others.

What is the role of the package-lock.json?

package-lock.json: It contains the exact version details that is currently installed for your Application.

Do I need Content-Type: application/octet-stream for file download?

No.

The content-type should be whatever it is known to be, if you know it. application/octet-stream is defined as "arbitrary binary data" in RFC 2046, and there's a definite overlap here of it being appropriate for entities whose sole intended purpose is to be saved to disk, and from that point on be outside of anything "webby". Or to look at it from another direction; the only thing one can safely do with application/octet-stream is to save it to file and hope someone else knows what it's for.

You can combine the use of Content-Disposition with other content-types, such as image/png or even text/html to indicate you want saving rather than display. It used to be the case that some browsers would ignore it in the case of text/html but I think this was some long time ago at this point (and I'm going to bed soon so I'm not going to start testing a whole bunch of browsers right now; maybe later).

RFC 2616 also mentions the possibility of extension tokens, and these days most browsers recognise inline to mean you do want the entity displayed if possible (that is, if it's a type the browser knows how to display, otherwise it's got no choice in the matter). This is of course the default behaviour anyway, but it means that you can include the filename part of the header, which browsers will use (perhaps with some adjustment so file-extensions match local system norms for the content-type in question, perhaps not) as the suggestion if the user tries to save.

Hence:

Content-Type: application/octet-stream
Content-Disposition: attachment; filename="picture.png"

Means "I don't know what the hell this is. Please save it as a file, preferably named picture.png".

Content-Type: image/png
Content-Disposition: attachment; filename="picture.png"

Means "This is a PNG image. Please save it as a file, preferably named picture.png".

Content-Type: image/png
Content-Disposition: inline; filename="picture.png"

Means "This is a PNG image. Please display it unless you don't know how to display PNG images. Otherwise, or if the user chooses to save it, we recommend the name picture.png for the file you save it as".

Of those browsers that recognise inline some would always use it, while others would use it if the user had selected "save link as" but not if they'd selected "save" while viewing (or at least IE used to be like that, it may have changed some years ago).

How to vertical align an inline-block in a line of text?

display: inline-block is your friend you just need all three parts of the construct - before, the "block", after - to be one, then you can vertically align them all to the middle:

Working Example

(it looks like your picture anyway ;))

CSS:

p, div {
  display: inline-block; 
  vertical-align: middle;
}
p, div {
  display: inline !ie7; /* hack for IE7 and below */
}

table {
  background: #000; 
  color: #fff; 
  font-size: 16px; 
  font-weight: bold; margin: 0 10px;
}

td {
  padding: 5px; 
  text-align: center;
}

HTML:

<p>some text</p> 
<div>
  <table summary="">
  <tr><td>A</td></tr>
  <tr><td>B</td></tr>
  <tr><td>C</td></tr>
  <tr><td>D</td></tr>
  </table>
</div> 
<p>continues afterwards</p>

Is it possible to serialize and deserialize a class in C++?

As far as "built-in" libraries go, the << and >> have been reserved specifically for serialization.

You should override << to output your object to some serialization context (usually an iostream) and >> to read data back from that context. Each object is responsible for outputting its aggregated child objects.

This method works fine so long as your object graph contains no cycles.

If it does, then you will have to use a library to deal with those cycles.

What is Bootstrap?

Bootstrap, as I know it, is a well defined CSS. Although using Bootstrap you could also use JavaScript, jQuery etc. But the main difference is that, using Bootstrap you can just call the class name and then you get the output on the HTML form. for eg. coloring of buttons shaping of text, using layouts. For all this you do not have to write a CSS file rather you just have to use the correct class name for shaping your HTML form.

disable past dates on datepicker

var dateToday = new Date();

$('#datepicker').datepicker({                                     
    'startDate': dateToday
});

How to sort a collection by date in MongoDB?

With mongoose it's as simple as:

collection.find().sort('-date').exec(function(err, collectionItems) {
  // here's your code
})

Why aren't Xcode breakpoints functioning?

See this post: Breakpoints not working in Xcode?. You might be pushing "Run" instead of "Debug" in which case your program is not running with the help of gdb, in which case you cannot expect breakpoints to work!

What is the command to exit a Console application in C#?

Console applications will exit when the main function has finished running. A "return" will achieve this.

    static void Main(string[] args)
    {
        while (true)
        {
            Console.WriteLine("I'm running!");
            return; //This will exit the console application's running thread
        }
    }

If you're returning an error code you can do it this way, which is accessible from functions outside of the initial thread:

    System.Environment.Exit(-1);

What is the difference between "is None" and "== None"

In this case, they are the same. None is a singleton object (there only ever exists one None).

is checks to see if the object is the same object, while == just checks if they are equivalent.

For example:

p = [1]
q = [1]
p is q # False because they are not the same actual object
p == q # True because they are equivalent

But since there is only one None, they will always be the same, and is will return True.

p = None
q = None
p is q # True because they are both pointing to the same "None"

Fatal error: Class 'Illuminate\Foundation\Application' not found

i was having same problem with this error. It turn out my Kenel.php is having a wrong syntax when i try to comply with wrong php8 syntax

The line should be

protected $commands = [
    //
];

instead of

protected array $commands = [
        //
];

How to increment variable under DOS?

Coming to the party very very late, but from my old memory of DOS batch files, you can keep adding a character to the string each loop then look for a string of that many of that character. for 250 iterations, you either have a very long "cycles" string, or you have one loop inside using one set of variables counting to 10, then another loop outside that uses another set of variable counting to 25.

Here is the basic loop to 30:

@echo off
rem put how many dots you want to loop
set cycles=..............................
set cntr=
:LOOP
set cntr=%cntr%.
echo around we go again
if "%cycles%"=="%cntr%" goto done
goto loop
:DONE
echo around we went

How do I list one filename per output line in Linux?

Yes, you can easily make ls output one filename per line:

ls -a | cat

Explanation: The command ls senses if the output is to a terminal or to a file or pipe and adjusts accordingly.

So, if you pipe ls -a to python it should work without any special measures.

How to use both onclick and target="_blank"

you can use

        <p><a href="/link/to/url" target="_blank"><button id="btn_id">Present Name </button></a></p>

Loading cross-domain endpoint with AJAX

To get the data form external site by passing using a local proxy as suggested by jherax you can create a php page that fetches the content for you from respective external url and than send a get request to that php page.

var req = new XMLHttpRequest();
req.open('GET', 'http://localhost/get_url_content.php',false);
if(req.status == 200) {
   alert(req.responseText);
}

as a php proxy you can use https://github.com/cowboy/php-simple-proxy

How to Select Min and Max date values in Linq Query

This should work for you

//Retrieve Minimum Date
var MinDate = (from d in dataRows select d.Date).Min();

//Retrieve Maximum Date
var MaxDate = (from d in dataRows select d.Date).Max();

(From here)

The matching wildcard is strict, but no declaration can be found for element 'context:component-scan

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
           http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
           http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context-3.0.xsd">

The above links need to be included

    <context:property-placeholder location="classpath:sport.properties" />


    <bean id="myFortune" class="com.kiran.springdemo.HappyFortuneService"></bean>

    <bean id="myCoach" class="com.kiran.springdemo.setterinjection.MyCricketCoach">
        <property name="fortuner" ref="myFortune" />

        <property name="emailAddress" value="${ipl.email}" />
        <property name="team" value="${ipl.team}" />

    </bean>


</beans>

How to redirect to a different domain using NGINX?

That should work via HTTPRewriteModule.

Example rewrite from www.example.com to example.com:

server {    
    server_name www.example.com;    
    rewrite ^ http://example.com$request_uri? permanent; 
}

Why is there extra padding at the top of my UITableView with style UITableViewStyleGrouped in iOS7

Using swift 4.1. Try this:

func tableView(_ tableView: UITableView, viewForHeaderInSection 
section: Int) -> UIView? {
    return nil 
}

Spring 3 RequestMapping: Get path value

private final static String MAPPING = "/foo/*";

@RequestMapping(value = MAPPING, method = RequestMethod.GET)
public @ResponseBody void foo(HttpServletRequest request, HttpServletResponse response) {
    final String mapping = getMapping("foo").replace("*", ""); 
    final String path = (String) request.getAttribute(HandlerMapping.PATH_WITHIN_HANDLER_MAPPING_ATTRIBUTE);
    final String restOfPath = url.replace(mapping, "");
    System.out.println(restOfPath);
}

private String getMapping(String methodName) {
    Method methods[] = this.getClass().getMethods();
    for (int i = 0; i < methods.length; i++) {
        if (methods[i].getName() == methodName) {
            String mapping[] = methods[i].getAnnotation(RequestMapping.class).value();
            if (mapping.length > 0) {
                return mapping[mapping.length - 1];
            }
        }
    }
    return null;
}

How to export html table to excel or pdf in php

<script src="jquery.min.js"></script>
<table border="1" id="ReportTable" class="myClass">
    <tr bgcolor="#CCC">
      <td width="100">xxxxx</td>
      <td width="700">xxxxxx</td>
      <td width="170">xxxxxx</td>
      <td width="30">xxxxxx</td>
    </tr>
    <tr bgcolor="#FFFFFF">
      <td><?php                 
            $date = date_create($row_Recordset3['fecha']);
            echo date_format($date, 'd-m-Y');
            ?></td>
      <td><?php echo $row_Recordset3['descripcion']; ?></td>
      <td><?php echo $row_Recordset3['producto']; ?></td>
      <td><img src="borrar.png" width="14" height="14" class="clickable" onClick="eliminarSeguimiento(<?php echo $row_Recordset3['idSeguimiento']; ?>)" title="borrar"></td>
    </tr>
  </table>

  <input type="hidden" id="datatodisplay" name="datatodisplay">  
    <input type="submit" value="Export to Excel">

exporttable.php

<?php
header('Content-Type: application/force-download');
header('Content-disposition: attachment; filename=export.xls');
// Fix for crappy IE bug in download.
header("Pragma: ");
header("Cache-Control: ");
echo $_REQUEST['datatodisplay'];
?>

Array and string offset access syntax with curly braces is deprecated

It's really simple to fix the issue, however keep in mind that you should fork and commit your changes for each library you are using in their repositories to help others as well.

Let's say you have something like this in your code:

$str = "test";
echo($str{0});

since PHP 7.4 curly braces method to get individual characters inside a string has been deprecated, so change the above syntax into this:

$str = "test";
echo($str[0]);

Fixing the code in the question will look something like this:

public function getRecordID(string $zoneID, string $type = '', string $name = ''): string
{
    $records = $this->listRecords($zoneID, $type, $name);
    if (isset($records->result[0]->id)) {
        return $records->result[0]->id;
    }
    return false;
}

Function stoi not declared

In comments under another answer, you indicated you are using a dodgy version of g++ under MS Windows.

In this case, -std=c++11 as suggested by the top answer would still not fix the problem.

Please see the following thread which does discuss your situation: std::stoi doesn't exist in g++ 4.6.1 on MinGW

I want to execute shell commands from Maven's pom.xml

Thanks! Tomer Ben David. it helped me. as I am doing pip install in demo folder as you mentioned npm install

<groupId>org.codehaus.mojo</groupId>
            <artifactId>exec-maven-plugin</artifactId>
            <version>1.3.2</version>
            <executions>
              <execution>
                <goals>
                  <goal>exec</goal>
                </goals>
              </execution>
            </executions>
            <configuration>
              <executable>pip</executable>
              <arguments><argument>install</argument></arguments>                            
             <workingDirectory>${project.build.directory}/Demo</workingDirectory>
            </configuration>

Passing data through intent using Serializable

You need to create a Bundle and then use putSerializable:

List<Thumbnail> all_thumbs = new ArrayList<Thumbnail>();
all_thumbs.add(new Thumbnail(string,bitmap));
Intent intent = new Intent(getApplicationContext(),SomeClass.class);

Bundle extras = new Bundle();

extras.putSerializable("value",all_thumbs);
intent.putExtras(extras);

Bad Gateway 502 error with Apache mod_proxy and Tomcat

If you want to handle your webapp's timeout with an apache load balancer, you first have to understand the different meaning of timeout. I try to condense the discussion I found here: http://apache-http-server.18135.x6.nabble.com/mod-proxy-When-does-a-backend-be-considered-as-failed-td5031316.html :

It appears that mod_proxy considers a backend as failed only when the transport layer connection to that backend fails. Unless failonstatus/failontimeout is used. ...

So, setting failontimeout is necessary for apache to consider a timeout of the webapp (e.g. served by tomcat) as a fail (and consecutively switch to the hot spare server). For the proper configuration, note the following misconfiguration:

ProxyPass / balancer://localbalance/ failontimeout=on timeout=10 failonstatus=50

This is a misconfiguration because:

You are defining a balancer here, so the timeout parameter relates to the balancer (like the two others). However for a balancer, the timeout parameter is not a connection timeout (like the one used with BalancerMember), but the maximum time to wait for a free worker/member (e.g. when all the workers are busy or in error state, the default being to not wait).

So, a proper configuration is done like this

set timeout at the BalanceMember level:

 <Proxy balancer://mycluster>
     BalancerMember http://member1:8080/svc timeout=6 
 ... more BalanceMembers here
</Proxy>

set the failontimeout on the balancer

ProxyPass /svc balancer://mycluster failontimeout=on

Restart apache.

"Object doesn't support this property or method" error in IE11

Add the code snippet in JS file used in master page or used globally.

<script language="javascript">
if (typeof browseris !== 'undefined') {
    browseris.ie = false;
}
</script>

For more information refer blog: http://blogs2share.blogspot.in/2016/11/object-doesnt-support-property-or.html

How to dismiss notification after action has been clicked

builder.setAutoCancel(true);

Tested on Android 9 also.

Relative div height

When you set a percentage height on an element who's parent elements don't have heights set, the parent elements have a default

height: auto;

You are asking the browser to calculate a height from an undefined value. Since that would equal a null-value, the result is that the browser does nothing with the height of child elements.

Besides using a JavaScript solution you could use this deadly easy table method:

#parent3 {
    display: table;
    width: 100%;
}

#parent3 .between {
    display: table-row;
}

#parent3 .child {
    display: table-cell;
}

Preview on http://jsbin.com/IkEqAfi/1

Example 1: Not working
Example 2: Fix height
Example 3: Table method

But: Bare in mind, that the table method only works properly in all modern Browsers and the Internet Explorer 8 and higher. As Fallback you could use JavaScript.

How to set UITextField height?

An update for iOS 6 : using auto-layout, even though you still can't set the UITextField's height from the Size Inspector in the Interface Builder (as of Xcode 4.5 DP4 at least), it is now possible to set a Height constraint on it, which you can edit from the Interface Builder.

Also, if you're setting the frame's height by code, auto-layout may reset it depending on the other constraints your view may have.

How to retrieve a recursive directory and file list from PowerShell excluding some files and folders?

Commenting here as this seems to be the most popular answer on the subject for searching for files whilst excluding certain directories in powershell.

To avoid issues with post filtering of results (i.e. avoiding permission issues etc), I only needed to filter out top level directories and that is all this example is based on, so whilst this example doesn't filter child directory names, it could very easily be made recursive to support this, if you were so inclined.

Quick breakdown of how the snippet works

$folders << Uses Get-Childitem to query the file system and perform folder exclusion

$file << The pattern of the file I am looking for

foreach << Iterates the $folders variable performing a recursive search using the Get-Childitem command

$folders = Get-ChildItem -Path C:\ -Directory -Name -Exclude Folder1,"Folder 2"
$file = "*filenametosearchfor*.extension"

foreach ($folder in $folders) {
   Get-Childitem -Path "C:/$folder" -Recurse -Filter $file | ForEach-Object { Write-Output $_.FullName }
}

Using intents to pass data between activities

Main Activity

public class MainActivity extends Activity {

    EditText user, password;
    Button login;

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

        user = (EditText) findViewById(R.id.username_edit);
        password = (EditText) findViewById(R.id.edit_password);
        login = (Button) findViewById(R.id.btnSubmit);
        login.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MainActivity.this,Second.class);

                String uservalue = user.getText().toString();
                String name_value = password.getText().toString();
                String password_value = password.getText().toString();

                intent.putExtra("username", uservalue);
                intent.putExtra("password", password_value);
                startActivity(intent);
            }
        });
    }
}

Second Activity in which you want to receive Data

public class Second extends Activity{

    EditText name, pass;
    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.second_activity);

        name = (EditText) findViewById(R.id.editText1);
        pass = (EditText) findViewById(R.id.editText2);

        String value = getIntent().getStringExtra("username");
        String pass_val = getIntent().getStringExtra("password");
        name.setText(value);
        pass.setText(pass_val);
    }
}

Sprintf equivalent in Java

Both solutions workto simulate printf, but in a different way. For instance, to convert a value to a hex string, you have the 2 following solutions:

with format(), closest to sprintf():

final static String HexChars = "0123456789abcdef";

public static String getHexQuad(long v) {
    String ret;
    if(v > 0xffff) ret = getHexQuad(v >> 16); else ret = "";
    ret += String.format("%c%c%c%c",
        HexChars.charAt((int) ((v >> 12) & 0x0f)),
        HexChars.charAt((int) ((v >>  8) & 0x0f)),
        HexChars.charAt((int) ((v >>  4) & 0x0f)),
        HexChars.charAt((int) ( v        & 0x0f)));
    return ret;
}

with replace(char oldchar , char newchar), somewhat faster but pretty limited:

    ...
    ret += "ABCD".
        replace('A', HexChars.charAt((int) ((v >> 12) & 0x0f))).
        replace('B', HexChars.charAt((int) ((v >>  8) & 0x0f))).
        replace('C', HexChars.charAt((int) ((v >>  4) & 0x0f))).
        replace('D', HexChars.charAt((int) ( v        & 0x0f)));
    ...

There is a third solution consisting of just adding the char to ret one by one (char are numbers that add to each other!) such as in:
```
...
ret += HexChars.charAt((int) ((v >> 12) & 0x0f)));
ret += HexChars.charAt((int) ((v >>  8) & 0x0f)));
...
```

...but that'd be really ugly.

Removing App ID from Developer Connection

As of Apr 2013, it is possible to delete App IDs.
As of Sep 2013, it is impossible to delete App IDs again after the big outage. I hope Apple will put it back.
As of mid 2014, it is possible to delete App IDs again. However, you can't delete id of apps existing in the App Store.

Error on renaming database in SQL Server 2008 R2

In SQL Server Management Studio (SSMS):

You can also right click your database in the Object Explorer and go to Properties. From there, go to Options. Scroll all the way down and set Restrict Access to SINGLE_USER. Change your database name, then go back in and set it back to MULTI_USER.

What is the difference between AF_INET and PF_INET in socket programming?

AF = Address Family
PF = Protocol Family

Meaning, AF_INET refers to addresses from the internet, IP addresses specifically. PF_INET refers to anything in the protocol, usually sockets/ports.

Consider reading the man pages for socket(2) and bind(2). For the sin_addr field, just do something like the following to set it:

struct sockaddr_in addr;
inet_pton(AF_INET, "127.0.0.1", &addr.sin_addr);

What is the best way to seed a database in Rails?

Usually there are 2 types of seed data required.

Basic data upon which the core of your application may rely. I call this the common seeds.
Environmental data, for example to develop the app it is useful to have a bunch of data in a known state that us can use for working on the app locally (the Factory Girl answer above covers this kind of data).

In my experience I was always coming across the need for these two types of data. So I put together a small gem that extends Rails' seeds and lets you add multiple common seed files under db/seeds/ and any environmental seed data under db/seeds/ENV for example db/seeds/development.

I have found this approach is enough to give my seed data some structure and gives me the power to setup my development or staging environment in a known state just by running:

rake db:setup

Fixtures are fragile and flakey to maintain, as are regular sql dumps.

GCC fatal error: stdio.h: No such file or directory

ubuntu users:

sudo apt-get install libc6-dev

specially ruby developers that have problem installing gem install json -v '1.8.2' on their VMs

What are the differences between if, else, and else if?

The syntax of if statement is

if(condition)
    something; // executed, when condition is true
else
    otherthing; // otherwise this part is executed

So, basically, else is a part of if construct (something and otherthing are often compound statements enclosed in {} and else part is, in fact, optional). And else if is a combination of two ifs, where otherthing is an if itself.

if(condition1)
    something;
else if(condition2)
    otherthing;
else
    totallydifferenthing;

PHP add elements to multidimensional array with array_push

I know the topic is old, but I just fell on it after a google search so... here is another solution:

$array_merged = array_merge($array_going_first, $array_going_second);

This one seems pretty clean to me, it works just fine!

Java: How to resolve java.lang.NoClassDefFoundError: javax/xml/bind/JAXBException

The dependency versions that I needed to use when compiling for Java 8 target. Tested application in Java 8, 11, and 12 JREs.

        <!-- replace dependencies that have been removed from JRE's starting with Java v11 -->
        <dependency>
            <groupId>javax.xml.bind</groupId>
            <artifactId>jaxb-api</artifactId>
            <version>2.2.8</version>
        </dependency>
        <dependency>
            <groupId>com.sun.xml.bind</groupId>
            <artifactId>jaxb-core</artifactId>
            <version>2.2.8-b01</version>
        </dependency>
        <dependency>
            <groupId>com.sun.xml.bind</groupId>
            <artifactId>jaxb-impl</artifactId>
            <version>2.2.8-b01</version>
        </dependency>
        <!-- end replace dependencies that have been removed from JRE's starting with Java v11 -->

Sql Server equivalent of a COUNTIF aggregate function

I would use this syntax. It achives the same as Josh and Chris's suggestions, but with the advantage it is ANSI complient and not tied to a particular database vendor.

select count(case when myColumn = 1 then 1 else null end)
from   AD_CurrentView

How do I get the absolute directory of a file in bash?

This will work for both file and folder:

absPath(){
    if [[ -d "$1" ]]; then
        cd "$1"
        echo "$(pwd -P)"
    else 
        cd "$(dirname "$1")"
        echo "$(pwd -P)/$(basename "$1")"
    fi
}

how to access iFrame parent page using jquery?

If you need to find the jQuery instance in the parent document (e.g., to call an utility function provided by a plug-in) use one of these syntaxes:

window.parent.$
window.parent.jQuery

Example:

window.parent.$.modal.close();

jQuery gets attached to the window object and that's what window.parent is.

How can I determine if a .NET assembly was built for x86 or x64?

Try to use CorFlagsReader from this project at CodePlex. It has no references to other assemblies and it can be used as is.

php: catch exception and continue execution, is it possible?

Another angle on this is returning an Exception, NOT throwing one, from the processing code.

I needed to do this with a templating framework I'm writing. If the user attempts to access a property that doesn't exist on the data, I return the error from deep within the processing function, rather than throwing it.

Then, in the calling code, I can decide whether to throw this returned error, causing the try() to catch(), or just continue:

// process the template
    try
    {
        // this function will pass back a value, or a TemplateExecption if invalid
            $result = $this->process($value);

        // if the result is an error, choose what to do with it
            if($result instanceof TemplateExecption)
            {
                if(DEBUGGING == TRUE)
                {
                    throw($result); // throw the original error
                }
                else
                {
                    $result = NULL; // ignore the error
                }
            }
    }

// catch TemplateExceptions
    catch(TemplateException $e)
    {
        // handle template exceptions
    }

// catch normal PHP Exceptions
    catch(Exception $e)
    {
        // handle normal exceptions
    }

// if we get here, $result was valid, or ignored
    return $result;

The result of this is I still get the context of the original error, even though it was thrown at the top.

Another option might be to return a custom NullObject or a UnknownProperty object and compare against that before deciding to trip the catch(), but as you can re-throw errors anyway, and if you're fully in control of the overall structure, I think this is a neat way round the issue of not being able to continue try/catches.

Pretty-print a Map in Java

Look at the code for HashMap#toString() and AbstractMap#toString() in the OpenJDK sources:

class java.util.HashMap.Entry<K,V> implements Map.Entry<K,V> {
       public final String toString() {
           return getKey() + "=" + getValue();
       }
   }
 class java.util.AbstractMap<K,V> {
     public String toString() {
         Iterator<Entry<K,V>> i = entrySet().iterator();
         if (! i.hasNext())
            return "{}";

        StringBuilder sb = new StringBuilder();
        sb.append('{');
        for (;;) {
            Entry<K,V> e = i.next();
            K key = e.getKey();
            V value = e.getValue();
            sb.append(key   == this ? "(this Map)" : key);
            sb.append('=');
            sb.append(value == this ? "(this Map)" : value);
            if (! i.hasNext())
                return sb.append('}').toString();
            sb.append(", ");
        }
    }
}

So if the guys from OpenJDK did not find a more elegant way to do this, there is none :-)

Android Preventing Double Click On A Button

My solution is try to using a boolean variable :

public class Blocker {
    private static final int DEFAULT_BLOCK_TIME = 1000;
    private boolean mIsBlockClick;

    /**
     * Block any event occurs in 1000 millisecond to prevent spam action
     * @return false if not in block state, otherwise return true.
     */
    public boolean block(int blockInMillis) {
        if (!mIsBlockClick) {
            mIsBlockClick = true;
            new Handler().postDelayed(new Runnable() {
                @Override
                public void run() {
                    mIsBlockClick = false;
                }
            }, blockInMillis);
            return false;
        }
        return true;
    }

    public boolean block() {
        return block(DEFAULT_BLOCK_TIME);
    }
}

And using as below:

view.setOnClickListener(new View.OnClickListener() {
            private Blocker mBlocker = new Blocker();

            @Override
            public void onClick(View v) {
                if (!mBlocker.block(block-Time-In-Millis)) {
                    // do your action   
                }
            }
        });

UPDATE: Kotlin solution, using view extension

fun View.safeClick(listener: View.OnClickListener, blockInMillis: Long = 500) {
    var lastClickTime: Long = 0
    this.setOnClickListener {
        if (SystemClock.elapsedRealtime() - lastClickTime < blockInMillis) return@setOnClickListener
        lastClickTime = SystemClock.elapsedRealtime()
        listener.onClick(this)
    }
}

Angular2 equivalent of $document.ready()

In order to use jQuery inside Angular only declare the $ as following: declare var $: any;

How to show current time in JavaScript in the format HH:MM:SS?

_x000D_

function realtime() {
  
  let time = moment().format('hh:mm:ss.SS a').replace("m", "");
  document.getElementById('time').innerHTML = time;
  
  setInterval(() => {
    time = moment().format('hh:mm:ss.SS A');
    document.getElementById('time').innerHTML = time;
  }, 0)
}

realtime();

_x000D_

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.22.1/moment.min.js"></script>

<div id="time"></div>

_x000D_

EditText underline below text property

Simply change android:backgroundTint in xml code to your color

Restoring MySQL database from physical files

From the answer of @Vicent, I already restore MySQL database as below:

Step 1. Shutdown Mysql server

Step 2. Copy database in your database folder (in linux, the default location is /var/lib/mysql). Keep same name of the database, and same name of database in mysql mode.

sudo cp -rf   /mnt/ubuntu_426/var/lib/mysql/database1 /var/lib/mysql/

Step 3: Change own and change mode the folder:

sudo chown -R mysql:mysql /var/lib/mysql/database1
sudo chmod -R 660 /var/lib/mysql/database1
sudo chown  mysql:mysql /var/lib/mysql/database1 
sudo chmod 700 /var/lib/mysql/database1

Step 4: Copy ibdata1 in your database folder

sudo cp /mnt/ubuntu_426/var/lib/mysql/ibdata1 /var/lib/mysql/

sudo chown mysql:mysql /var/lib/mysql/ibdata1

Step 5: copy ib_logfile0 and ib_logfile1 files in your database folder.

sudo cp /mnt/ubuntu_426/var/lib/mysql/ib_logfile0 /var/lib/mysql/

sudo cp /mnt/ubuntu_426/var/lib/mysql/ib_logfile1 /var/lib/mysql/

Remember change own and change root of those files:

sudo chown -R mysql:mysql /var/lib/mysql/ib_logfile0

sudo chown -R mysql:mysql /var/lib/mysql/ib_logfile1

sudo chown -R mysql:mysql /var/lib/mysql

Step 6 (Optional): My site has configuration to store files in a specific location, then I copy those to corresponding location, exactly.

Step 7: Start your Mysql server. Everything come back and enjoy it.

That is it.

See more info at: https://biolinh.wordpress.com/2017/04/01/restoring-mysql-database-from-physical-files-debianubuntu/

Submit button doesn't work

Hello from the future.

For clarity, I just wanted to add (as this was pretty high up in google) - we can now use

<button type="submit">Upload Stuff</button>

And to reset a form

<button type="reset" value="Reset">Reset</button>

Check out button types

We can also attach buttons to submit forms like this:

<button type="submit" form="myform" value="Submit">Submit</button>

How to correctly get image from 'Resources' folder in NetBeans

I have a slightly different approach that might be useful/more beneficial to some.

Under your main project folder, create a resource folder. Your folder structure should look something like this.

Project Folder
- build
- dist
- lib
- nbproject
- resources
- src

Go to the properties of your project. You can do this by right clicking on your project in the Projects tab window and selecting Properties in the drop down menu.

Under categories on the left side, select Sources.

In Source Package Folders on the right side, add your resource folder using the Add Folder button. Once you click OK, you should see a Resources folder under your project.

You should now be able to pull resources using this line or similar approach:

MyClass.class.getResource("/main.jpg");

If you were to create a package called Images under the resources folder, you can retrieve the resource like this:

MyClass.class.getResource("/Images/main.jpg");

MySQL string replace

Yes, MySQL has a REPLACE() function:

mysql> SELECT REPLACE('www.mysql.com', 'w', 'Ww');
    -> 'WwWwWw.mysql.com'

http://dev.mysql.com/doc/refman/5.0/en/string-functions.html#function_replace

Note that it's easier if you make that an alias when using SELECT

SELECT REPLACE(string_column, 'search', 'replace') as url....

How can I use UserDefaults in Swift?

Swift 4 :

Store

    UserDefaults.standard.set(object/value, forKey: "key_name")

Retrive

    var returnValue: [datatype]? = UserDefaults.standard.object(forKey: "key_name") as? [datatype]

Remove

    UserDefaults.standard.removeObject(forKey:"key_name")

How to check if a value exists in a dictionary (python)

Python dictionary has get(key) function

>>> d.get(key)

For Example,

>>> d = {'1': 'one', '3': 'three', '2': 'two', '5': 'five', '4': 'four'}
>>> d.get('3')
'three'
>>> d.get('10')
None

If your key does'nt exist, will return None value.

foo = d[key] # raise error if key doesn't exist
foo = d.get(key) # return None if key doesn't exist

Content relevant to versions less than 3.0 and greater than 5.0.

How do I add an existing Solution to GitHub from Visual Studio 2013

OK this worked for me.

Open the solution in Visual Studio 2013
Select File | Add to Source Control
Select the Microsoft Git Provider

That creates a local GIT repository

Surf to GitHub
Create a new repository DO NOT SELECT Initialize this repository with a README

That creates an empty repository with no Master branch

Once created open the repository and copy the URL (it's on the right of the screen in the current version)
Go back to Visual Studio
- Make sure you have the Microsoft Git Provider selected under Tools/Options/Source Control/Plug-in Selection
Open Team Explorer
Select Home | Unsynced Commits
Enter the GitHub URL into the yellow box (use HTTPS URL, not the default shown SSH one)
Click Publish
Select Home | Changes
Add a Commit comment
Select Commit and Push from the drop down

Your solution is now in GitHub

Posting parameters to a url using the POST method without using a form

How to do it without using cURL with straight-up PHP: http://netevil.org/blog/2006/nov/http-post-from-php-without-curl

There can be only one auto column

Note also that "key" does not necessarily mean primary key. Something like this will work:

CREATE TABLE book (
    isbn             BIGINT NOT NULL PRIMARY KEY,
    id               INT    NOT NULL AUTO_INCREMENT,
    accepted_terms   BIT(1) NOT NULL,
    accepted_privacy BIT(1) NOT NULL,
    INDEX(id)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

This is a contrived example and probably not the best idea, but it can be very useful in certain cases.

Compare two files in Visual Studio

In Visual Studio Code you can:

Go to the Explorer
Right click the first file you want to compare
Select Select for compare
Right click on the second file you want to compare
Select Compare with '[NAME OF THE PREVIOUSLY SELECTED FILE]'

Hibernate table not mapped error in HQL query

This answer comes late but summarizes the concept involved in the "table not mapped" exception(in order to help those who come across this problem since its very common for hibernate newbies). This error can appear due to many reasons but the target is to address the most common one that is faced by a number of novice hibernate developers to save them hours of research. I am using my own example for a simple demonstration below.

The exception:

org.hibernate.hql.internal.ast.QuerySyntaxException: subscriber is not mapped [ from subscriber]

In simple words, this very usual exception only tells that the query is wrong in the below code.

Session session = this.sessionFactory.getCurrentSession();
List<Subscriber> personsList = session.createQuery(" from subscriber").list();

This is how my POJO class is declared:

@Entity
@Table(name = "subscriber")
public class Subscriber

But the query syntax "from subscriber" is correct and the table subscriber exists. Which brings me to a key point:

It is an HQL query not SQL.

and how its explained here

HQL works with persistent objects and their properties not with the database tables and columns.

Since the above query is an HQL one, the subscriber is supposed to be an entity name not a table name. Since I have my table subscriber mapped with the entity Subscriber. My problem solves if I change the code to this:

Session session = this.sessionFactory.getCurrentSession();
List<Subscriber> personsList = session.createQuery(" from Subscriber").list();

Just to keep you from getting confused. Please note that HQL is case sensitive in a number of cases. Otherwise it would have worked in my case.

Keywords like SELECT , FROM and WHERE etc. are not case sensitive but properties like table and column names are case sensitive in HQL.

https://www.tutorialspoint.com/hibernate/hibernate_query_language.htm

To further understand how hibernate mapping works, please read this

CSS strikethrough different color from text?

I've used an empty :after element and decorated one border on it. You can even use CSS transforms to rotate it for a slanted line. Result: pure CSS, no extra HTML elements! Downside: doesn't wrap across multiple lines, although IMO you shouldn't use strikethrough on large blocks of text anyway.

_x000D_

s,_x000D_
strike {_x000D_
  text-decoration: none;_x000D_
  /*we're replacing the default line-through*/_x000D_
  position: relative;_x000D_
  display: inline-block;_x000D_
  /* keeps it from wrapping across multiple lines */_x000D_
}_x000D_
_x000D_
s:after,_x000D_
strike:after {_x000D_
  content: "";_x000D_
  /* required property */_x000D_
  position: absolute;_x000D_
  bottom: 0;_x000D_
  left: 0;_x000D_
  border-top: 2px solid red;_x000D_
  height: 45%;_x000D_
  /* adjust as necessary, depending on line thickness */_x000D_
  /* or use calc() if you don't need to support IE8: */_x000D_
  height: calc(50% - 1px);_x000D_
  /* 1px = half the line thickness */_x000D_
  width: 100%;_x000D_
  transform: rotateZ(-4deg);_x000D_
}

_x000D_

<p>Here comes some <strike>strike-through</strike> text!</p>

_x000D_

How to open a file for both reading and writing?

I have tried something like this and it works as expected:

f = open("c:\\log.log", 'r+b')
f.write("\x5F\x9D\x3E")
f.read(100)
f.close()

Where:

f.read(size) - To read a file’s contents, call f.read(size), which reads some quantity of data and returns it as a string.

And:

f.write(string) writes the contents of string to the file, returning None.

Also if you open Python tutorial about reading and writing files you will find that:

'r+' opens the file for both reading and writing.

On Windows, 'b' appended to the mode opens the file in binary mode, so there are also modes like 'rb', 'wb', and 'r+b'.

How to call any method asynchronously in c#

public partial class MainForm : Form
{
    Image img;
    private void button1_Click(object sender, EventArgs e)
    {
        LoadImageAsynchronously("http://media1.santabanta.com/full5/Indian%20%20Celebrities(F)/Jacqueline%20Fernandez/jacqueline-fernandez-18a.jpg");
    }

    private void LoadImageAsynchronously(string url)
    {
        /*
        This is a classic example of how make a synchronous code snippet work asynchronously.
        A class implements a method synchronously like the WebClient's DownloadData(…) function for example
            (1) First wrap the method call in an Anonymous delegate.
            (2) Use BeginInvoke(…) and send the wrapped anonymous delegate object as the last parameter along with a callback function name as the first parameter.
            (3) In the callback method retrieve the ar's AsyncState as a Type (typecast) of the anonymous delegate. Along with this object comes EndInvoke(…) as free Gift
            (4) Use EndInvoke(…) to retrieve the synchronous call’s return value in our case it will be the WebClient's DownloadData(…)’s return value.
        */
        try
        {
            Func<Image> load_image_Async = delegate()
            {
                WebClient wc = new WebClient();
                Bitmap bmpLocal = new Bitmap(new MemoryStream(wc.DownloadData(url)));
                wc.Dispose();
                return bmpLocal;
            };

            Action<IAsyncResult> load_Image_call_back = delegate(IAsyncResult ar)
            {
                Func<Image> ss = (Func<Image>)ar.AsyncState;
                Bitmap myBmp = (Bitmap)ss.EndInvoke(ar);

                if (img != null) img.Dispose();
                if (myBmp != null)
                    img = myBmp;
                Invalidate();
                //timer.Enabled = true;
            };
            //load_image_Async.BeginInvoke(callback_load_Image, load_image_Async);             
            load_image_Async.BeginInvoke(new AsyncCallback(load_Image_call_back), load_image_Async);             
        }
        catch (Exception ex)
        {

        }
    }
    protected override void OnPaint(PaintEventArgs e)
    {
        if (img != null)
        {
            Graphics grfx = e.Graphics;
            grfx.DrawImage(img,new Point(0,0));
        }
    }

Leaflet changing Marker color

1) Add the marker 2) find the backgroundcolor attribute for the css and change it. Here it is:
JS

var myIcon = L.divIcon({
      className: 'my-div-icon',
      iconSize: [5, 5]
    });
var marker = L.marker([50,-20], {icon: myIcon}).addTo(map);
    marker.valueOf()._icon.style.backgroundColor = 'green'; //or any color

How to disable back swipe gesture in UINavigationController on iOS 7

For Swift 4 this works:

class MyViewController: UIViewController, UIGestureRecognizerDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()

        self.navigationController?.interactivePopGestureRecognizer?.gesture.delegate = self
    }

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(true)

        self.navigationController?.interactivePopGestureRecognizer?.gesture.isEnabled = false
    }

}

What is JSONP, and why was it created?

JSONP stands for JSON with Padding.

Here is the site, with great examples, with the explanation from the simplest use of this technique to the most advanced in plane JavaScript:

w3schools.com / JSONP

One of my more favorite techniques described above is Dynamic JSON Result, which allow to send JSON to the PHP file in URL parameter, and let the PHP file also return a JSON object based on the information it gets.

Tools like jQuery also have facilities to use JSONP:

jQuery.ajax({
  url: "https://data.acgov.org/resource/k9se-aps6.json?city=Berkeley",
  jsonp: "callbackName",
  dataType: "jsonp"
}).done(
  response => console.log(response)
);

error: expected unqualified-id before ‘.’ token //(struct)

The struct's name is ReducedForm; you need to make an object (instance of the struct or class) and use that. Do this:

ReducedForm MyReducedForm;
MyReducedForm.iSimplifiedNumerator = iNumerator/iGreatCommDivisor;
MyReducedForm.iSimplifiedDenominator = iDenominator/iGreatCommDivisor;

add maven repository to build.gradle

After

apply plugin: 'com.android.application'

You should add this:

  repositories {
        mavenCentral()
        maven {
            url "https://repository-achartengine.forge.cloudbees.com/snapshot/"
        }
    }

@Benjamin explained the reason.

If you have a maven with authentication you can use:

repositories {
            mavenCentral()
            maven {
               credentials {
                   username xxx
                   password xxx
               }
               url    'http://mymaven/xxxx/repositories/releases/'
            }
}

It is important the order.

How to write Unicode characters to the console?

This works for me:

Console.OutputEncoding = System.Text.Encoding.Default;

To display some of the symbols, it's required to set Command Prompt's font to Lucida Console:

Open Command Prompt;
Right click on the top bar of the Command Prompt;
Click Properties;
If the font is set to Raster Fonts, change it to Lucida Console.

how to change php version in htaccess in server

You can't change PHP version by .htaccess.

you need to get your server updated, for PHP 5.3 or you can find another host, which serves PHP 5.3 on shared hosting.

ASP.NET MVC: No parameterless constructor defined for this object

This error also occurs when using an IDependencyResolver, such as when using an IoC container, and the dependency resolver returns null. In this case ASP.NET MVC 3 defaults to using the DefaultControllerActivator to create the object. If the object being created does not have a public no-args constructor an exception will then be thrown any time the provided dependency resolver has returned null.

Here's one such stack trace:

[MissingMethodException: No parameterless constructor defined for this object.]
   System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck) +0
   System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache) +98
   System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean skipCheckThis, Boolean fillCache) +241
   System.Activator.CreateInstance(Type type, Boolean nonPublic) +69
   System.Web.Mvc.DefaultControllerActivator.Create(RequestContext requestContext, Type controllerType) +67

[InvalidOperationException: An error occurred when trying to create a controller of type 'My.Namespace.MyController'. Make sure that the controller has a parameterless public constructor.]
   System.Web.Mvc.DefaultControllerActivator.Create(RequestContext requestContext, Type controllerType) +182
   System.Web.Mvc.DefaultControllerFactory.GetControllerInstance(RequestContext requestContext, Type controllerType) +80
   System.Web.Mvc.DefaultControllerFactory.CreateController(RequestContext requestContext, String controllerName) +74
   System.Web.Mvc.MvcHandler.ProcessRequestInit(HttpContextBase httpContext, IController& controller, IControllerFactory& factory) +232
   System.Web.Mvc.<>c__DisplayClass6.<BeginProcessRequest>b__2() +49
   System.Web.Mvc.<>c__DisplayClassb`1.<ProcessInApplicationTrust>b__a() +13
   System.Web.Mvc.SecurityUtil.<GetCallInAppTrustThunk>b__0(Action f) +7
   System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Action action) +22
   System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Func`1 func) +124
   System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object state) +98
   System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContext httpContext, AsyncCallback callback, Object state) +50
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.BeginProcessRequest(HttpContext context, AsyncCallback cb, Object extraData) +16
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +8963444
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +184

Specify system property to Maven project

I have learned it is also possible to do this with the exec-maven-plugin if you're doing a "standalone" java app.

            <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>exec-maven-plugin</artifactId>
            <version>${maven.exec.plugin.version}</version>
            <executions>
                <execution>
                    <goals>
                        <goal>java</goal>
                    </goals>
                </execution>
            </executions>
            <configuration>
                <mainClass>${exec.main-class}</mainClass>
                <systemProperties>
                    <systemProperty>
                        <key>myproperty</key>
                        <value>myvalue</value>
                    </systemProperty>
                </systemProperties>
            </configuration>
        </plugin>

What is the difference between str and repr?

To put it simply:

__str__ is used in to show a string representation of your object to be read easily by others.

__repr__ is used to show a string representation of the object.

Let's say I want to create a Fraction class where the string representation of a fraction is '(1/2)' and the object (Fraction class) is to be represented as 'Fraction (1,2)'

So we can create a simple Fraction class:

class Fraction:
    def __init__(self, num, den):
        self.__num = num
        self.__den = den

    def __str__(self):
        return '(' + str(self.__num) + '/' + str(self.__den) + ')'

    def __repr__(self):
        return 'Fraction (' + str(self.__num) + ',' + str(self.__den) + ')'



f = Fraction(1,2)
print('I want to represent the Fraction STRING as ' + str(f)) # (1/2)
print('I want to represent the Fraction OBJECT as ', repr(f)) # Fraction (1,2)

Load local JSON file into variable

If you pasted your object into content.json directly, it is invalid JSON. JSON keys and values must be wrapped in double quotes (" not ') unless the value is numeric, boolean, null, or composite (array or object). JSON cannot contain functions or undefined values. Below is your object as valid JSON.

{
  "id": "whatever",
  "name": "start",
  "children": [
    {
      "id": "0.9685",
      "name": " contents:queue"
    },
    {
      "id": "0.79281",
      "name": " contents:mqq_error"
    }
  ]
}

You also had an extra }.

Converting Symbols, Accent Letters to English Alphabet

There is no easy or general way to do what you want because it is just your subjective opinion that these letters look loke the latin letters you want to convert to. They are actually separate letters with their own distinct names and sounds which just happen to superficially look like a latin letter.

If you want that conversion, you have to create your own translation table based on what latin letters you think the non-latin letters should be converted to.

(If you only want to remove diacritial marks, there are some answers in this thread: How do I remove diacritics (accents) from a string in .NET? However you describe a more general problem)

How can I suppress the newline after a print statement?

Because python 3 print() function allows end="" definition, that satisfies the majority of issues.

In my case, I wanted to PrettyPrint and was frustrated that this module wasn't similarly updated. So i made it do what i wanted:

from pprint import PrettyPrinter

class CommaEndingPrettyPrinter(PrettyPrinter):
    def pprint(self, object):
        self._format(object, self._stream, 0, 0, {}, 0)
        # this is where to tell it what you want instead of the default "\n"
        self._stream.write(",\n")

def comma_ending_prettyprint(object, stream=None, indent=1, width=80, depth=None):
    """Pretty-print a Python object to a stream [default is sys.stdout] with a comma at the end."""
    printer = CommaEndingPrettyPrinter(
        stream=stream, indent=indent, width=width, depth=depth)
    printer.pprint(object)

Now, when I do:

comma_ending_prettyprint(row, stream=outfile)

I get what I wanted (substitute what you want -- Your Mileage May Vary)

Group by & count function in sqlalchemy

If you are using Table.query property:

from sqlalchemy import func
Table.query.with_entities(Table.column, func.count(Table.column)).group_by(Table.column).all()

If you are using session.query() method (as stated in miniwark's answer):

from sqlalchemy import func
session.query(Table.column, func.count(Table.column)).group_by(Table.column).all()

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

argc means the number of argument that are passed to the program. char* argv[] are the passed arguments. argv[0] is always the program name itself. I'm not a 100% sure, but I think int main() is valid in C/C++.

How to fix a header on scroll

Just building on Rich's answer, which uses offset.

I modified this as follows:

There was no need for the var $sticky in Rich's example, it wasn't doing anything

I've moved the offset check into a separate function, and called it on document ready as well as on scroll so if the page refreshes with the scroll half-way down the page, it resizes straight-away without having to wait for a scroll trigger

jQuery(document).ready(function($){
    var offset = $( "#header" ).offset();
    checkOffset();

    $(window).scroll(function() {
        checkOffset();
    });

    function checkOffset() {
        if ( $(document).scrollTop() > offset.top){
            $('#header').addClass('fixed');
        } else {
            $('#header').removeClass('fixed');
        } 
    }

});

Detect key input in Python

Use Tkinter there are a ton of tutorials online for this. basically, you can create events. Here is a link to a great site! This makes it easy to capture clicks. Also, if you are trying to make a game, Tkinter also has a GUI. Although, I wouldn't recommend Python for games at all, it could be a fun experiment. Good Luck!

Can't bind to 'dataSource' since it isn't a known property of 'table'

Please see your dataSource varibale doesn't get the data from the server or dataSource is not assigned to the expected format of data.

SQL like search string starts with

COLLATE UTF8_GENERAL_CI will work as ignore-case. USE:

SELECT * from games WHERE title COLLATE UTF8_GENERAL_CI LIKE 'age of empires III%';

SELECT * from games WHERE LOWER(title) LIKE 'age of empires III%';

CSV in Python adding an extra carriage return, on Windows

Note that if you use DictWriter, you will have a new line from the open function and a new line from the writerow function. You can use newline='' within the open function to remove the extra newline.

get one item from an array of name,value JSON

Find one element

To find the element with a given name in an array you can use find:

arr.find(item=>item.name=="k1");

Note that find will return just one item (namely the first match):

{
  "name": "k1",
  "value": "abc"
}

Find all elements

In your original array there's only one item occurrence of each name.

If the array contains multiple elements with the same name and you want them all then use filter, which will return an array.

_x000D_

var arr = [];_x000D_
arr.push({name:"k1", value:"abc"});_x000D_
arr.push({name:"k2", value:"hi"});_x000D_
arr.push({name:"k3", value:"oa"});_x000D_
arr.push({name:"k1", value:"def"});_x000D_
_x000D_
var item;_x000D_
_x000D_
// find the first occurrence of item with name "k1"_x000D_
item = arr.find(item=>item.name=="k1");_x000D_
console.log(item);_x000D_
_x000D_
// find all occurrences of item with name "k1"_x000D_
// now item is an array_x000D_
item = arr.filter(item=>item.name=="k1");_x000D_
console.log(item);

_x000D_

Find indices

Similarly, for indices you can use findIndex (for finding the first match) and filter + map to find all indices.

_x000D_

var arr = [];_x000D_
arr.push({name:"k1", value:"abc"});_x000D_
arr.push({name:"k2", value:"hi"});_x000D_
arr.push({name:"k3", value:"oa"});_x000D_
arr.push({name:"k1", value:"def"});_x000D_
_x000D_
var idx;_x000D_
_x000D_
// find index of the first occurrence of item with name "k1"_x000D_
idx = arr.findIndex(item=>item.name == "k1");_x000D_
console.log(idx, arr[idx].value);_x000D_
_x000D_
// find indices of all occurrences of item with name "k1"_x000D_
// now idx is an array_x000D_
idx = arr.map((item, i) => item.name == "k1" ? i : '').filter(String);_x000D_
console.log(idx);

_x000D_

Path of assets in CSS files in Symfony 2

I'll post what worked for me, thanks to @xavi-montero.

Put your CSS in your bundle's Resource/public/css directory, and your images in say Resource/public/img.

Change assetic paths to the form 'bundles/mybundle/css/*.css', in your layout.

In config.yml, add rule css_rewrite to assetic:

assetic:
    filters:
        cssrewrite:
            apply_to: "\.css$"

Now install assets and compile with assetic:

$ rm -r app/cache/* # just in case
$ php app/console assets:install --symlink
$ php app/console assetic:dump --env=prod

This is good enough for the development box, and --symlink is useful, so you don't have to reinstall your assets (for example, you add a new image) when you enter through app_dev.php.

For the production server, I just removed the '--symlink' option (in my deployment script), and added this command at the end:

$ rm -r web/bundles/*/css web/bundles/*/js # all this is already compiled, we don't need the originals

All is done. With this, you can use paths like this in your .css files: ../img/picture.jpeg

How to use color picker (eye dropper)?

Currently, the eyedropper tool is not working in my version of Chrome (as described above), though it worked for me in the past. I hear it is being updated in the latest version of Chrome.

However, I'm able to grab colors easily in Firefox.

Open page in Firefox
Hamburger Menu -> Web Developer -> Eyedropper
Drag eyedropper tool over the image... Click.
Color is copied to your clipboard, and eyedropper tool goes away.
Paste color code

In case you cannot get the eyedropper tool to work in Chrome, this is a good work around.
I also find it easier to access :-)

How to make a programme continue to run after log out from ssh?

Assuming that you have a program running in the foreground, press ctrl-Z, then:

[1]+  Stopped                 myprogram
$ disown -h %1
$ bg 1
[1]+ myprogram &
$ logout

If there is only one job, then you don't need to specify the job number. Just use disown -h and bg.

Explanation of the above steps:

You press ctrl-Z. The system suspends the running program, displays a job number and a "Stopped" message and returns you to a bash prompt.

You type the disown -h %1 command (here, I've used a 1, but you'd use the job number that was displayed in the Stopped message) which marks the job so it ignores the SIGHUP signal (it will not be stopped by logging out).

Next, type the bg command using the same job number; this resumes the running of the program in the background and a message is displayed confirming that.

You can now log out and it will continue running..

How to output git log with the first line only?

If you don't want hashes and just the first lines (subject lines):

git log --pretty=format:%s

Invoke-Command error "Parameter set cannot be resolved using the specified named parameters"

The accepted answer is correct regarding the Invoke-Command cmdlet, but more broadly speaking, cmdlets can have parameter sets where groups of input parameters are defined, such that you can't use two parameters that aren't members of the same parameter set.

If you're running into this error with any other cmdlet, look up its Microsoft documentation, and see if the the top of the page has distinct sets of parameters listed. For example, the documentation for Set-AzureDeployment defines three sets at the top of the page.

AngularJS - difference between pristine/dirty and touched/untouched

This is a late answer but hope this might help.

Scenario 1: You visited the site for first time and did not touch any field. The state of form is

ng-untouched and ng-pristine

Scenario 2: You are currently entering the values in a particular field in the form. Then the state is

ng-untouched and ng-dirty

Scenario 3: You are done with entering the values in the field and moved to next field

ng-touched and ng-dirty

Scenario 4: Say a form has a phone number field . You have entered the number but you have actually entered 9 digits but there are 10 digits required for a phone number.Then the state is ng-invalid

In short:

ng-untouched:When the form field has not been visited yet

ng-touched: When the form field is visited AND the field has lost focus

ng-pristine: The form field value is not changed

ng-dirty: The form field value is changed

ng-valid : When all validations of form fields are successful

ng-invalid: When all validations of form fields are not successful

What are the differences between LDAP and Active Directory?

Active Directory is a database based system that provides authentication, directory, policy, and other services in a Windows environment

LDAP (Lightweight Directory Access Protocol) is an application protocol for querying and modifying items in directory service providers like Active Directory, which supports a form of LDAP.

Short answer: AD is a directory services database, and LDAP is one of the protocols you can use to talk to it.

AttributeError: Module Pip has no attribute 'main'

It works well:

 py -m pip install --user --upgrade pip==9.0.3

How do you make Vim unhighlight what you searched for?

Append the following line to the end of your .vimrc to prevent highlighting altogether:

set nohlsearch

jQuery date formatting

An alternative would be simple js date() function, if you don't want to use jQuery/jQuery plugin:

e.g.:

var formattedDate = new Date("yourUnformattedOriginalDate");
var d = formattedDate.getDate();
var m =  formattedDate.getMonth();
m += 1;  // JavaScript months are 0-11
var y = formattedDate.getFullYear();

$("#txtDate").val(d + "." + m + "." + y);

see: 10 ways to format time and date using JavaScript

If you want to add leading zeros to day/month, this is a perfect example: Javascript add leading zeroes to date

and if you want to add time with leading zeros try this: getMinutes() 0-9 - how to with two numbers?

Check OS version in Swift?

Update:
Now you should use new availability checking introduced with Swift 2:
e.g. To check for iOS 9.0 or later at compile time use this:

if #available(iOS 9.0, *) {
    // use UIStackView
} else {
    // show sad face emoji
}

or can be used with whole method or class

@available(iOS 9.0, *)
func useStackView() {
    // use UIStackView
}

For more info see this.

Run time checks:

if you don't want exact version but want to check iOS 9,10 or 11 using if:

let floatVersion = (UIDevice.current.systemVersion as NSString).floatValue

EDIT: Just found another way to achieve this:

let iOS8 = floor(NSFoundationVersionNumber) > floor(NSFoundationVersionNumber_iOS_7_1)
let iOS7 = floor(NSFoundationVersionNumber) <= floor(NSFoundationVersionNumber_iOS_7_1)

Display text from .txt file in batch file

Here's a version that doesn't fail if log.txt is missing:


@echo off
  if not exist log.txt goto firstlogin
  echo Date/Time last login:
  type log.txt
  goto end

:firstlogin
  echo No last login found.

:end
  echo %date%, %time%. > log.txt
  pause

Easiest way to convert a Blob into a byte array

The easiest way is this.

byte[] bytes = rs.getBytes("my_field");

JavaScript inside an <img title="<a href='#' onClick='alert('Hello World!')>The Link</a>" /> possible?

No, this is, as you say "rubbish code". If it works as should, it is because browsers try to "read the writer's mind" - in other words, they have algorithms to try to make sense of "rubbish code", guess at the probable intent and internally change it into something that actually makes sense.

In other words, your code only works by accident, and probably not in all browsers.

Is this what you're trying to do?

<a href="#" onClick="alert('Hello World!')"><img title="The Link" /></a>

Removing NA in dplyr pipe

I don't think desc takes an na.rm argument... I'm actually surprised it doesn't throw an error when you give it one. If you just want to remove NAs, use na.omit (base) or tidyr::drop_na:

outcome.df %>%
  na.omit() %>%
  group_by(Hospital, State) %>%
  arrange(desc(HeartAttackDeath)) %>%
  head()

library(tidyr)
outcome.df %>%
  drop_na() %>%
  group_by(Hospital, State) %>%
  arrange(desc(HeartAttackDeath)) %>%
  head()

If you only want to remove NAs from the HeartAttackDeath column, filter with is.na, or use tidyr::drop_na:

outcome.df %>%
  filter(!is.na(HeartAttackDeath)) %>%
  group_by(Hospital, State) %>%
  arrange(desc(HeartAttackDeath)) %>%
  head()

outcome.df %>%
  drop_na(HeartAttackDeath) %>%
  group_by(Hospital, State) %>%
  arrange(desc(HeartAttackDeath)) %>%
  head()

As pointed out at the dupe, complete.cases can also be used, but it's a bit trickier to put in a chain because it takes a data frame as an argument but returns an index vector. So you could use it like this:

outcome.df %>%
  filter(complete.cases(.)) %>%
  group_by(Hospital, State) %>%
  arrange(desc(HeartAttackDeath)) %>%
  head()

How to use "like" and "not like" in SQL MSAccess for the same field?

If you're doing it in VBA (and not in a query) then: where field like "AA" and field not like "BB" then would not work.

You'd have to use: where field like "AA" and field like "BB" = false then

How can I remove item from querystring in asp.net using c#?

Here is a simple way. Reflector is not needed.

    public static string GetQueryStringWithOutParameter(string parameter)
    {
        var nameValueCollection = System.Web.HttpUtility.ParseQueryString(HttpContext.Current.Request.QueryString.ToString());
        nameValueCollection.Remove(parameter);
        string url = HttpContext.Current.Request.Path + "?" + nameValueCollection;

        return url;
    }

Here QueryString.ToString() is required because Request.QueryString collection is read only.

Formatting numbers (decimal places, thousands separators, etc) with CSS

No, you have to use javascript once it's in the DOM or format it via your language server-side (PHP/ruby/python etc.)

How do I export html table data as .csv file?

Here is a really quick CoffeeScript/jQuery example

csv = []
for row in $('#sometable tr')
  csv.push ("\"#{col.innerText}\"" for col in $(row).find('td,th')).join(',')
output = csv.join("\n")

How do I check if a column is empty or null in MySQL?

I hate messy fields in my databases. If the column might be a blank string or null, I'd rather fix this before doing the select each time, like this:

UPDATE MyTable SET MyColumn=NULL WHERE MyColumn='';
SELECT * FROM MyTable WHERE MyColumn IS NULL

This keeps the data tidy, as long as you don't specifically need to differentiate between NULL and empty for some reason.

Using Intent in an Android application to show another activity

you can use the context of the view that did the calling. Example:

Button orderButton = (Button)findViewById(R.id.order);

orderButton.setOnClickListener(new View.OnClickListener() {

  @Override
  public void onClick(View view) {
    Intent intent = new Intent(/*FirstActivity.this*/ view.getContext(), OrderScreen.class);
    startActivity(intent);
  }

});

XSS prevention in JSP/Servlet web application

There is no easy, out of the box solution against XSS. The OWASP ESAPI API has some support for the escaping that is very usefull, and they have tag libraries.

My approach was to basically to extend the stuts 2 tags in following ways.

Modify s:property tag so it can take extra attributes stating what sort of escaping is required (escapeHtmlAttribute="true" etc.). This involves creating a new Property and PropertyTag classes. The Property class uses OWASP ESAPI api for the escaping.
Change freemarker templates to use the new version of s:property and set the escaping.

If you didn't want to modify the classes in step 1, another approach would be to import the ESAPI tags into the freemarker templates and escape as needed. Then if you need to use a s:property tag in your JSP, wrap it with and ESAPI tag.

I have written a more detailed explanation here.

http://www.nutshellsoftware.org/software/securing-struts-2-using-esapi-part-1-securing-outputs/

I agree escaping inputs is not ideal.

How do I make a WPF TextBlock show my text on multiple lines?

If you just want to have your header font a little bit bigger then the rest, you can use ScaleTransform. so you do not depend on the real fontsize.

 <TextBlock x:Name="headerText" Text="Lorem ipsum dolor">
                <TextBlock.LayoutTransform>
                    <ScaleTransform ScaleX="1.1" ScaleY="1.1" />
                </TextBlock.LayoutTransform>
  </TextBlock>

Using SUMIFS with multiple AND OR conditions

With the following, it is easy to link the Cell address...

=SUM(SUMIFS(FAGLL03!$I$4:$I$1048576,FAGLL03!$A$4:$A$1048576,">="&INDIRECT("A"&ROW()),FAGLL03!$A$4:$A$1048576,"<="&INDIRECT("B"&ROW()),FAGLL03!$Q$4:$Q$1048576,E$2))

Can use address / substitute / Column functions as required to use Cell addresses in full DYNAMIC.

How do I convert strings in a Pandas data frame to a 'date' data type?

Essentially equivalent to @waitingkuo, but I would use to_datetime here (it seems a little cleaner, and offers some additional functionality e.g. dayfirst):

In [11]: df
Out[11]:
   a        time
0  1  2013-01-01
1  2  2013-01-02
2  3  2013-01-03

In [12]: pd.to_datetime(df['time'])
Out[12]:
0   2013-01-01 00:00:00
1   2013-01-02 00:00:00
2   2013-01-03 00:00:00
Name: time, dtype: datetime64[ns]

In [13]: df['time'] = pd.to_datetime(df['time'])

In [14]: df
Out[14]:
   a                time
0  1 2013-01-01 00:00:00
1  2 2013-01-02 00:00:00
2  3 2013-01-03 00:00:00

Handling ValueErrors
If you run into a situation where doing

df['time'] = pd.to_datetime(df['time'])

Throws a

ValueError: Unknown string format

That means you have invalid (non-coercible) values. If you are okay with having them converted to pd.NaT, you can add an errors='coerce' argument to to_datetime:

df['time'] = pd.to_datetime(df['time'], errors='coerce')

How to set DateTime to null

It looks like you just want:

eventCustom.DateTimeEnd = string.IsNullOrWhiteSpace(dateTimeEnd)
    ? (DateTime?) null
    : DateTime.Parse(dateTimeEnd);

Note that this will throw an exception if dateTimeEnd isn't a valid date.

An alternative would be:

DateTime validValue;
eventCustom.DateTimeEnd = DateTime.TryParse(dateTimeEnd, out validValue)
    ? validValue
    : (DateTime?) null;

That will now set the result to null if dateTimeEnd isn't valid. Note that TryParse handles null as an input with no problems.

Plotting images side by side using matplotlib

If the images are in an array and you want to iterate through each element and print it, you can write the code as follows:

plt.figure(figsize=(10,10)) # specifying the overall grid size

for i in range(25):
    plt.subplot(5,5,i+1)    # the number of images in the grid is 5*5 (25)
    plt.imshow(the_array[i])

plt.show()

Also note that I used subplot and not subplots. They're both different

JavaScript getElementByID() not working

You need to put the JavaScript at the end of the body tag.

It doesn't find it because it's not in the DOM yet!

You can also wrap it in the onload event handler like this:

window.onload = function() {
var refButton = document.getElementById( 'btnButton' );
refButton.onclick = function() {
   alert( 'I am clicked!' );
}
}

Python: What OS am I running on?

Sample code to differentiate OS's using python:

from sys import platform as _platform

if _platform == "linux" or _platform == "linux2":
    # linux
elif _platform == "darwin":
    # MAC OS X
elif _platform == "win32":
    # Windows
elif _platform == "win64":
    # Windows 64-bit

VBScript How can I Format Date?

Although answer is provided I found simpler solution:

Date:

01/20/2017

By doing replace

CurrentDate = replace(date, "/", "-")

It will output:

01-20-2017

Free space in a CMD shell

If you run "dir c:\", the last line will give you the free disk space.

Edit: Better solution: "fsutil volume diskfree c:"

Get the string value from List<String> through loop for display

List<String> al=new ArrayList<string>();
al.add("One");
al.add("Two");
al.add("Three");

for(String al1:al) //for each construct
{
System.out.println(al1);
}

O/p will be

One
Two
Three

Could not insert new outlet connection: Could not find any information for the class named

Simplest solution:- I used xCode 7 and iOS 9.

in your .m

delete #import "VC.h"

save .m and link your outlet again it work fine.

Difference between margin and padding?

Margin is applied to the outside of you element hence effecting how far your element is away from other elements.

Padding is applied to the inside of your element hence effecting how far your element's content is away from the border.

Also, using margin will not affect your element's dimensions whereas padding will make your elements dimensions (set height + padding) so for example if you have a 100x100px div with a 5 px padding, your div will actually be 105x105px

How to set DOM element as the first child?

You can implement it directly i all your window html elements.
Like this :

HTMLElement.prototype.appendFirst = function(childNode) {
    if (this.firstChild) {
        this.insertBefore(childNode, this.firstChild);
    }
    else {
        this.appendChild(childNode);
    }
};

Visual Studio 2010 - recommended extensions

DevExpress CodeRush Xpress (free)

Call angularjs function using jquery/javascript

You can use following:

angular.element(domElement).scope() to get the current scope for the element

angular.element(domElement).injector() to get the current app injector

angular.element(domElement).controller() to get a hold of the ng-controller instance.

Hope that might help

Fatal error: Class 'PHPMailer' not found

This answers in an extension to what avs099 has given above, for those who are still having problems:

1.Makesure that you have php_openssl.dll installed(else find it online and install it);

2.Go to your php.ini; find extension=php_openssl.dll enable it/uncomment

3.Go to github and downland the latetest version :6.0 at this time.

4.Extract the master copy into the path that works better for you(I recommend the same directory as the calling file)

Now copy this code into your foo-mailer.php and render it with your gmail stmp authentications.

    require("/PHPMailer-master/src/PHPMailer.php");
    require("/PHPMailer-master/src/SMTP.php");
    require("/PHPMailer-master/src/Exception.php");


    $mail = new PHPMailer\PHPMailer\PHPMailer();
    $mail->IsSMTP(); 

    $mail->CharSet="UTF-8";
    $mail->Host = "smtp.gmail.com";
    $mail->SMTPDebug = 1; 
    $mail->Port = 465 ; //465 or 587

     $mail->SMTPSecure = 'ssl';  
    $mail->SMTPAuth = true; 
    $mail->IsHTML(true);

    //Authentication
    $mail->Username = "[email protected]";
    $mail->Password = "*******";

    //Set Params
    $mail->SetFrom("[email protected]");
    $mail->AddAddress("[email protected]");
    $mail->Subject = "Test";
    $mail->Body = "hello";


     if(!$mail->Send()) {
        echo "Mailer Error: " . $mail->ErrorInfo;
     } else {
        echo "Message has been sent";
     }

Disclaimer:The original owner of the code above is avs099 with just my little input.

Take note of the additional:

a) (PHPMailer\PHPMailer) namespace:needed for name conflict resolution.

b) The (require("/PHPMailer-master/src/Exception.php");):It was missing in avs099's code thus the problem encountered by aProgger,you need that line to tell the mailer class where the Exception class is located.

MVC 5 Access Claims Identity User Data

Remember that in order to query the IEnumerable you need to reference system.linq.
It will give you the extension object needed to do:

CaimsList.FirstOrDefault(x=>x.Type =="variableName").toString();

regular expression to validate datetime format (MM/DD/YYYY)

The answer marked is perfect but for one scenario, where in the dd and mm are actually single digits. the following regex is perfect in this case:

_x000D_

    function validateDate(testdate) {_x000D_
        var date_regex = /^(0?[1-9]|1[0-2])\/(0?[1-9]|1\d|2\d|3[01])\/(19|20)\d{2}$/ ;_x000D_
        return date_regex.test(testdate);_x000D_
    }

_x000D_

Difference between "Complete binary tree", "strict binary tree","full binary Tree"?

To start with basics, it is very important to understand binary tree itself to understand different types of it.

A tree is a binary tree if and only if :-

– It has a root node , which may not have any child nodes (0 childnodes, NULL tree)

–Root node may have 1 or 2 child nodes . Each such node forms abinary tree itself

–Number of child nodes can be 0 ,1 ,2.......not more than 2

–There is a unique path from the root to every other node

Example :

Coming to your inquired terminologies:

A binary tree is a complete binary tree ( of height h , we take root node as 0 ) if and only if :-

Level 0 to h-1 represent a full binary tree of height h-1

– One or more nodes in level h-1 may have 0, or 1 child nodes

If j,k are nodes in level h-1, then j has more child nodes than k if and only if j is to the left of k , i.e. the last level (h) can be missing leaf nodes, however the ones present must be shifted to the left

Example :

                          X
                     /          \
                   /              \
                 /                  \
                X                    X
             /     \              /     \
           X       X             X       X
         /   \   /   \         /   \    /  \ 
        X    X   X   X        X    X    X   X

A binary tree is a strictly binary tree if and only if :-

Each node has exactly two child nodes or no nodes

Example :

         X
       /   \
      X     X 
          /   \
         X      X
        / \    / \ 
       X   X  X   X

A binary tree is a full binary tree if and only if :-

Each non leaf node has exactly two child nodes

All leaf nodes are at the same level

Example :

                          X
                     /          \
                   /              \
                 /                  \
                X                    X
             /     \              /     \
           X       X             X       X
         /   \   /   \         /   \    /  \ 
        X    X   X   X        X    X    X   X 
      /  \  / \ / \ / \      / \  / \  / \ / \ 
     X   X X  X X X X X     X  X  X X  X X X X

You should also know what a perfect binary tree is?

A binary tree is a perfect binary tree if and only if :-

– is a full binary tree

– All leaf nodes are at the same level

Example :

                          X
                     /          \
                   /              \
                 /                  \
                X                    X
             /     \              /     \
           X       X             X       X
         /   \   /   \         /   \    /  \ 
        X    X   X   X        X    X    X   X 
      /  \  / \ / \ / \      / \  / \  / \ / \ 
     X   X X  X X X X X     X  X  X X  X X X X

Well, I am sorry I cannot post images as I do not have 10 reputation. Hope this helps you and others!

Error 0x80005000 and DirectoryServices

Just had that problem in a production system in the company where I live... A webpage that made a LDAP bind stopped working after an IP changed.

The solution... ... I installed Basic Authentication to perform the troubleshooting indicated here: https://support.microsoft.com/en-us/kb/329986

And after that, things just started to work. Even after I re-disabled Basic Authentication in the page I was testing, all other pages started working again with Windows Authentication.

Regards, Acácio

Is it possible to sort a ES6 map object?

As far as I see it's currently not possible to sort a Map properly.

The other solutions where the Map is converted into an array and sorted this way have the following bug:

var a = new Map([[1, 2], [3,4]])
console.log(a);    // a = Map(2) {1 => 2, 3 => 4}

var b = a;
console.log(b);    // b = Map(2) {1 => 2, 3 => 4}

a = new Map();     // this is when the sorting happens
console.log(a, b); // a = Map(0) {}     b = Map(2) {1 => 2, 3 => 4}

The sorting creates a new object and all other pointers to the unsorted object get broken.

Programs & Examples On #Request.querystring

How do you test your Request.QueryString[] variables?

how does Request.QueryString work?

How to get the browser language using JavaScript

Google Chrome Printing Page Breaks

Seconds CountDown Timer

Angular js init ng-model from default values

"Adaptive Server is unavailable or does not exist" error connecting to SQL Server from PHP

Return values from the row above to the current row

PHP Get all subdirectories of a given directory

c++ string array initialization

What Content-Type value should I send for my XML sitemap?

Changing API level Android Studio

MySQL Error 1093 - Can't specify target table for update in FROM clause

ssh "permissions are too open" error

How to read Excel cell having Date with Apache POI?

How to Navigate from one View Controller to another using Swift

Oracle "(+)" Operator

How to export a Hive table into a CSV file?

How to create a simple checkbox in iOS?

How to vertically center <div> inside the parent element with CSS?

Get client IP address via third party web service

Making a UITableView scroll when text field is selected

Can I animate absolute positioned element with CSS transition?

PHP ini file_get_contents external url

PHP Checking if the current date is before or after a set date

Do not want scientific notation on plot axis

How to fix getImageData() error The canvas has been tainted by cross-origin data?

Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.12:test (default-test) on project.

Spring .properties file: get element as an Array

What are the rules about using an underscore in a C++ identifier?

Rename MySQL database

OpenCV Python rotate image by X degrees around specific point

Ruby optional parameters

add a temporary column with a value

how to check if item is selected from a comboBox in C#

My kubernetes pods keep crashing with "CrashLoopBackOff" but I can't find any log

Error:Unknown host services.gradle.org. You may need to adjust the proxy settings in Gradle

How to store Java Date to Mysql datetime with JPA

Time in milliseconds in C

background: fixed no repeat not working on mobile

Highlight text similar to grep, but don't filter out text

Defining custom attrs

What does "res.render" do, and what does the html file look like?

How could I create a list in c++?

Bulk Insert Correctly Quoted CSV File in SQL Server

Spring MVC: How to perform validation?

Do on-demand Mac OS X cloud services exist, comparable to Amazon's EC2 on-demand instances?

C# static class why use?

How can I set the default timezone in node.js?

Twitter API - Display all tweets with a certain hashtag?

C++ convert string to hexadecimal and vice versa

Which encoding opens CSV files correctly with Excel on both Mac and Windows?

Set padding for UITextField with UITextBorderStyleNone

Can you get the column names from a SqlDataReader?

Can I style an image's ALT text with CSS?

Changing the text on a label

How to Round to the nearest whole number in C#

Scala how can I count the number of occurrences in a list

Open text file and program shortcut in a Windows batch file

Getting Keyboard Input

You can use Scanner class

Android checkbox style

Else clause on Python while statement

How to convert any date format to yyyy-MM-dd

How to resolve Nodejs: Error: ENOENT: no such file or directory

Find records with a date field in the last 24 hours

Rails 3 check if attribute changed

java.text.ParseException: Unparseable date

Experimental decorators warning in TypeScript compilation

How to Generate Barcode using PHP and Display it as an Image on the same page

Return array from function

How do I clone a Django model instance object and save it to the database?

How to set focus on a view when a layout is created and displayed?

How to convert Base64 String to javascript file object like as from file input form?

What is the role of the package-lock.json?

Do I need Content-Type: application/octet-stream for file download?

How to vertical align an inline-block in a line of text?

Working Example

Is it possible to serialize and deserialize a class in C++?