How to Generate Unique Public and Private Key via RSA

What I ended up doing is create a new KeyContainer name based off of the current DateTime (DateTime.Now.Ticks.ToString()) whenever I need to create a new key and save the container name and public key to the database. Also, whenever I create a new key I would do the following:

public static string ConvertToNewKey(string oldPrivateKey)
{

    // get the current container name from the database...

    rsa.PersistKeyInCsp = false;
    rsa.Clear();
    rsa = null;

    string privateKey = AssignNewKey(true); // create the new public key and container name and write them to the database...

       // re-encrypt existing data to use the new keys and write to database...

    return privateKey;
}
public static string AssignNewKey(bool ReturnPrivateKey){
     string containerName = DateTime.Now.Ticks.ToString();
     // create the new key...
     // saves container name and public key to database...
     // and returns Private Key XML.
}

before creating the new key.

Validate that text field is numeric usiung jQuery

I know there isn't any need to add a plugin for this.

But this can be useful if you are doing so many things with numbers. So checkout this plugin at least for a knowledge point of view.

The rest of karim79's answer is super cool.

<!DOCTYPE html>
<html>
    <head>
        <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js"></script>
        <script type="text/javascript" src="jquery.numeric.js"></script>
    </head>

    <body>
        <form>
            Numbers only:
            <input class="numeric" type="text" />
            Integers only:
            <input class="integer" type="text" />
            No negative values:
            <input class="positive" type="text" />
            No negative values (integer only):
            <input class="positive-integer" type="text" />
            <a href="#" id="remove">Remove numeric</a>
        </form>

        <script type="text/javascript">
            $(".numeric").numeric();

            $(".integer").numeric(false, function() {
                alert("Integers only");
                this.value = "";
                this.focus();
            });

            $(".positive").numeric({ negative: false },
                function() {
                    alert("No negative values");
                    this.value = "";
                    this.focus();
                });

            $(".positive-integer").numeric({ decimal: false, negative: false },
                function() {
                    alert("Positive integers only");
                    this.value = "";
                    this.focus();
                });

            $("#remove").click(
                function(e)
                {
                    e.preventDefault();
                    $(".numeric,.integer,.positive").removeNumeric();
                }
            );
        </script>

    </body>
</html>

Angular 2 declaring an array of objects

First, generate an Interface

Assuming you are using TypeScript & Angular CLI, you can generate one by using the following command

ng g interface car

After that set the data types of its properties

// car.interface.ts
export interface car {
  id: number;
  eco: boolean;
  wheels: number;
  name: string;
}

You can now import your interface in the class that you want.

import {car} from "app/interfaces/car.interface";

And update the collection/array of car objects by pushing items in the array.

this.car.push({
  id: 12345,
  eco: true,
  wheels: 4,
  name: 'Tesla Model S',
});

Override and reset CSS style: auto or none don't work

I believe the reason why the first set of properties will not work is because there is no auto value for display, so that property should be ignored. In that case, inline-table will still take effect, and as width do not apply to inline elements, that set of properties will not do anything.

The second set of properties will simply hide the table, as that's what display: none is for.

Try resetting it to table instead:

table.other {
    width: auto;
    min-width: 0;
    display: table;
}

Edit: min-width defaults to 0, not auto

SQL - Query to get server's IP address

It's in the @@SERVERNAME variable;

SELECT @@SERVERNAME;

Even though JRE 8 is installed on my MAC -" No Java Runtime present,requesting to install " gets displayed in terminal

TL;DR

For JDK 11 try this:

To handle this problem in a clean way, I suggest to use brew and jenv.

For Java 11 follow this 2 steps, first :

JAVA_VERSION=11
brew reinstall jenv 
brew reinstall openjdk@${JAVA_VERSION}
jenv add /usr/local/opt/openjdk@${JAVA_VERSION}/
jenv global ${JAVA_VERSION}

And add this at end of your shell config scripts
`~/.bashrc` or `~/.zshrc`

export PATH="$HOME/.jenv/bin:$PATH"
eval "$(jenv init -)"
export JAVA_HOME="$HOME/.jenv/versions/`jenv version-name`"

Problem solved!

Then restart your shell and try to execute java -version

Note: If you have this problem, your current JDK version is not existent or misconfigured (or may be you have only JRE).

String comparison in bash. [[: not found

Is the first line in your script:

#!/bin/bash

#!/bin/sh

the sh shell produces this error messages, not bash

What programming languages can one use to develop iPhone, iPod Touch and iPad (iOS) applications?

Only Objective-C is allowed by now... but since a few months ago you are allowed to write scripts that will be interpreted in your application.

So you may be able to write a LUA interpreter or a Python interpreter, then write some part of your application in this scripting language. If you want your application accepted on the App Store, these scripts have to be bundled with the application (your application cannot download it from the Internet for example)

see new app store rules

Data at the root level is invalid

This:

doc.LoadXml(HttpContext.Current.Server.MapPath("officeList.xml"));

should be:

doc.Load(HttpContext.Current.Server.MapPath("officeList.xml"));

LoadXml() is for loading an XML string, not a file name.

SQLite add Primary Key

Introduction

This is based on Android's java and it's a good example on changing the database without annoying your application fans/customers. This is based on the idea of the SQLite FAQ page http://sqlite.org/faq.html#q11

The problem

I did not notice that I need to set a row_number or record_id to delete a single purchased item in a receipt, and at same time the item barcode number fooled me into thinking of making it as the key to delete that item. I am saving a receipt details in the table receipt_barcode. Leaving it without a record_id can mean deleting all records of the same item in a receipt if I used the item barcode as the key.

Notice

Please understand that this is a copy-paste of my code I am work on at the time of this writing. Use it only as an example, copy-pasting randomly won't help you. Modify this first to your needs

Also please don't forget to read the comments in the code .

The Code

Use this as a method in your class to check 1st whether the column you want to add is missing . We do this just to not repeat the process of altering the table receipt_barcode. Just mention it as part of your class. In the next step you'll see how we'll use it.

public boolean is_column_exists(SQLiteDatabase mDatabase , String table_name,
String     column_name) {
    //checks if table_name has column_name
    Cursor cursor = mDatabase.rawQuery("pragma table_info("+table_name+")",null);
    while (cursor.moveToNext()){
    if (cursor.getString(cursor.getColumnIndex("name")).equalsIgnoreCase(column_name)) return true;
    }
    return false;
}

Then , the following code is used to create the table receipt_barcode if it already does NOT exit for the 1st time users of your app. And please notice the "IF NOT EXISTS" in the code. It has importance.

//mDatabase should be defined as a Class member (global variable) 
//for ease of access : 
//SQLiteDatabse mDatabase=SQLiteDatabase.openOrCreateDatabase(dbfile_path, null);
creation_query = " CREATE TABLE if not exists receipt_barcode ( ";
creation_query += "\n record_id        INTEGER PRIMARY KEY AUTOINCREMENT,";
creation_query += "\n rcpt_id INT( 11 )       NOT NULL,";
creation_query += "\n barcode VARCHAR( 255 )  NOT NULL ,";
creation_query += "\n barcode_price VARCHAR( 255 )  DEFAULT (0),";
creation_query += "\n PRIMARY KEY ( record_id ) );";
mDatabase.execSQL(creation_query);

//This is where the important part comes in regarding the question in this page:

//adding the missing primary key record_id in table receipt_barcode for older versions
        if (!is_column_exists(mDatabase, "receipt_barcode","record_id")){
            mDatabase.beginTransaction();
            try{
                Log.e("record_id", "creating");


                 creation_query="CREATE TEMPORARY TABLE t1_backup(";
                 creation_query+="record_id INTEGER        PRIMARY KEY AUTOINCREMENT,";
                 creation_query+="rcpt_id INT( 11 )       NOT NULL,";
                 creation_query+="barcode VARCHAR( 255 )  NOT NULL ,";
                 creation_query+="barcode_price VARCHAR( 255 )  NOT NULL DEFAULT (0) );";
                 mDatabase.execSQL(creation_query);

                 creation_query="INSERT INTO t1_backup(rcpt_id,barcode,barcode_price) SELECT rcpt_id,barcode,barcode_price  FROM receipt_barcode;";
                 mDatabase.execSQL(creation_query);

                 creation_query="DROP TABLE receipt_barcode;";
                 mDatabase.execSQL(creation_query);

                 creation_query="CREATE TABLE receipt_barcode (";
                 creation_query+="record_id INTEGER        PRIMARY KEY AUTOINCREMENT,";
                 creation_query+="rcpt_id INT( 11 )       NOT NULL,";
                 creation_query+="barcode VARCHAR( 255 )  NOT NULL ,";
                 creation_query+="barcode_price VARCHAR( 255 )  NOT NULL DEFAULT (0) );";
                 mDatabase.execSQL(creation_query);

                 creation_query="INSERT INTO receipt_barcode(record_id,rcpt_id,barcode,barcode_price) SELECT record_id,rcpt_id,barcode,barcode_price  FROM t1_backup;";
                 mDatabase.execSQL(creation_query);

                 creation_query="DROP TABLE t1_backup;";
                 mDatabase.execSQL(creation_query);


                 mdb.setTransactionSuccessful();
            } catch (Exception exception ){
                Log.e("table receipt_bracode", "Table receipt_barcode did not get a primary key (record_id");
                exception.printStackTrace();
            } finally {
                 mDatabase.endTransaction();
            }

Could not find a version that satisfies the requirement tensorflow

1.Go to https://www.tensorflow.org/install/pip website and look if the version you are using support the Tensorflow. some latest version does not support Tesnsorflow. until Tensorflow releases its latest version for that Python version.

you must have 64 bit python installed
have latest version of pip installed
pip install --upgrade pip

mysql Foreign key constraint is incorrectly formed error

I had the same issue with Symfony 2.8.

I didn't get it at first, because there were no similar problems with int length of foreign keys etc.

Finally I had to do the following in the project folder. (A server restart didn't help!)

app/console doctrine:cache:clear-metadata app/console doctrine:cache:clear-query app/console doctrine:cache:clear-result

Postman - How to see request with headers and body data with variables substituted

Update 2018-12-12 - Chrome App v Chrome Plugin - Most recent updates at top

With the deprecation of the Postman Chrome App, assuming that you are now using the Postman Native App, the options are now:

Hover over variables with mouse
Generate "Code" button/link
Postman Console

See below for full details on each option.

Personally, I still go for 2) Generate "Code" button/link as it allows me to see the variables without actually having to send.

Demo Request

Demo Environment

1) Hover over variables with mouse

2) Generate "Code" button/link

3) Postman Console

Update: 2016-06-03

Whilst the method described above does work, in practice, I now normally use the "Generate Code" link on the Postman Request screen. The generated code, no matter what code language you choose, contains the substituted variables. Hitting the "Generate Code" link is just faster, additionally, you can see the substituted variables without actually making the request.

Original Answer below

To see the substituted variables in the Headers and Body, you need to use Chrome Developer tools. To enable Chrome Developer Tools from within Postman do the following, as per http://blog.getpostman.com/2015/06/13/debugging-postman-requests/.

I have copied the instructions from the link above in case the link gets broken in the future:

Type chrome://flags inside your Chrome URL window
Search for “packed” or try to find the “Enable debugging for packed apps”
Enable the setting
Restart Chrome

You can access the Developer Tools window by right clicking anywhere inside Postman and selecting “inspect element”. You can also go to chrome://inspect/#apps and then click “inspect” just below requester.html under the Postman heading.

Once enabled, you can use the Network Tools tab for even more information on your requests or the console while writing test scripts. If something goes wrong with your test scripts, it’ll show up here.

How do I monitor the computer's CPU, memory, and disk usage in Java?

This works for me perfectly without any external API, just native Java hidden feature :)

import com.sun.management.OperatingSystemMXBean;
...
OperatingSystemMXBean osBean = ManagementFactory.getPlatformMXBean(
                OperatingSystemMXBean.class);
// What % CPU load this current JVM is taking, from 0.0-1.0
System.out.println(osBean.getProcessCpuLoad());

// What % load the overall system is at, from 0.0-1.0
System.out.println(osBean.getSystemCpuLoad());

Things possible in IntelliJ that aren't possible in Eclipse?

Show Navigation Bar ALT-Home.

SQL Server default character encoding

SELECT DATABASEPROPERTYEX('DBName', 'Collation') SQLCollation;

Where DBName is your database name.

Vector erase iterator

The following also seems to work :

for (vector<int>::iterator it = res.begin(); it != res.end(); it++)
{
  res.erase(it--);
}

Not sure if there's any flaw in this ?

Flask Error: "Method Not Allowed The method is not allowed for the requested URL"

I also had similar problem where redirects were giving 404 or 405 randomly on my development server. It was an issue with gunicorn instances.

Turns out that I had not properly shut down the gunicorn instance before starting a new one for testing. Somehow both of the processes were running simultaneously, listening to the same port 8080 and interfering with each other. Strangely enough they continued running in background after I had killed all my terminals. Had to kill them manually using fuser -k 8080/tcp

How to run wget inside Ubuntu Docker image?

I had this problem recently where apt install wget does not find anything. As it turns out apt update was never run.

apt update
apt install wget

After discussing this with a coworker we mused that apt update is likely not run in order to save both time and space in the docker image.

How to scale down a range of numbers with a known min and max value

Here's how I understand it:

What percent does `x` lie in a range

Let's assume you have a range from 0 to 100. Given an arbitrary number from that range, what "percent" from that range does it lie in? This should be pretty simple, 0 would be 0%, 50 would be 50% and 100 would be 100%.

Now, what if your range was 20 to 100? We cannot apply the same logic as above (divide by 100) because:

20 / 100

doesn't give us 0 (20 should be 0% now). This should be simple to fix, we just need to make the numerator 0 for the case of 20. We can do that by subtracting:

(20 - 20) / 100

However, this doesn't work for 100 anymore because:

(100 - 20) / 100

doesn't give us 100%. Again, we can fix this by subtracting from the denominator as well:

(100 - 20) / (100 - 20)

A more generalized equation for finding out what % x lies in a range would be:

(x - MIN) / (MAX - MIN)

Scale range to another range

Now that we know what percent a number lies in a range, we can apply it to map the number to another range. Let's go through an example.

old range = [200, 1000]
new range = [10, 20]

If we have a number in the old range, what would the number be in the new range? Let's say the number is 400. First, figure out what percent 400 is within the old range. We can apply our equation above.

(400 - 200) / (1000 - 200) = 0.25

So, 400 lies in 25% of the old range. We just need to figure out what number is 25% of the new range. Think about what 50% of [0, 20] is. It would be 10 right? How did you arrive at that answer? Well, we can just do:

20 * 0.5 = 10

But, what about from [10, 20]? We need to shift everything by 10 now. eg:

((20 - 10) * 0.5) + 10

a more generalized formula would be:

((MAX - MIN) * PERCENT) + MIN

To the original example of what 25% of [10, 20] is:

((20 - 10) * 0.25) + 10 = 12.5

So, 400 in the range [200, 1000] would map to 12.5 in the range [10, 20]

TLDR

To map x from old range to new range:

OLD PERCENT = (x - OLD MIN) / (OLD MAX - OLD MIN)
NEW X = ((NEW MAX - NEW MIN) * OLD PERCENT) + NEW MIN

ListView item background via custom selector

FrostWire Team over here.

All the selector crap api doesn't work as expected. After trying all the solutions presented in this thread to no good, we just solved the problem at the moment of inflating the ListView Item.

Make sure your item keeps it's state, we did it as a member variable of the MenuItem (boolean selected)

When you inflate, ask if the underlying item is selected, if so, just set the drawable resource that you want as the background (be it a 9patch or whatever). Make sure your adapter is aware of this and that it calls notifyDataChanged() when something has been selected.

    @Override
public View getView(int position, View convertView, ViewGroup parent) {
    View rowView = convertView;
    if (rowView == null) {
        LayoutInflater inflater = act.getLayoutInflater();
        rowView = inflater.inflate(R.layout.slidemenu_listitem, null);
        MenuItemHolder viewHolder = new MenuItemHolder();
        viewHolder.label = (TextView) rowView.findViewById(R.id.slidemenu_item_label);
        viewHolder.icon = (ImageView) rowView.findViewById(R.id.slidemenu_item_icon);
        rowView.setTag(viewHolder);
    }

    MenuItemHolder holder = (MenuItemHolder) rowView.getTag();
    String s = items[position].label;
    holder.label.setText(s);
    holder.icon.setImageDrawable(items[position].icon);

    //Here comes the magic
    rowView.setSelected(items[position].selected);

    rowView.setBackgroundResource((rowView.isSelected()) ? R.drawable.slidemenu_item_background_selected : R.drawable.slidemenu_item_background);

    return rowView;
}

It'd be really nice if the selectors would actually work, in theory it's a nice and elegant solution, but it seems like it's broken. KISS.

How to convert C# nullable int to int

You can't do it if v1 is null, but you can check with an operator.

v2 = v1 ?? 0;

Updating a JSON object using Javascript

A plain JavaScript solution, assuming jsonObj already contains JSON:

Loop over it looking for the matching Id, set the corresponding Username, and break from the loop after the matched item has been modified:

for (var i = 0; i < jsonObj.length; i++) {
  if (jsonObj[i].Id === 3) {
    jsonObj[i].Username = "Thomas";
    break;
  }
}

Here it is on jsFiddle.

Here's the same thing wrapped in a function:

function setUsername(id, newUsername) {
  for (var i = 0; i < jsonObj.length; i++) {
    if (jsonObj[i].Id === id) {
      jsonObj[i].Username = newUsername;
      return;
    }
  }
}

// Call as
setUsername(3, "Thomas");

How to tell if tensorflow is using gpu acceleration from inside python shell?

With tensorflow 2.0 >=

import tensorflow as tf
sess = tf.compat.v1.Session(config=tf.compat.v1.ConfigProto(log_device_placement=True))

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

Application.Exit() kills your application but there are some instances that it won't close the application.

End is better than Application.Exit().

Array as session variable

session_start();          //php part
$_SESSION['student']=array();
$student_name=$_POST['student_name']; //student_name form field name
$student_city=$_POST['city_id'];   //city_id form field name
array_push($_SESSION['student'],$student_name,$student_city);   
//print_r($_SESSION['student']);


<table class="table">     //html part
    <tr>
      <th>Name</th>
      <th>City</th>
    </tr>

    <tr>
     <?php for($i = 0 ; $i < count($_SESSION['student']) ; $i++) {
     echo '<td>'.$_SESSION['student'][$i].'</td>';
     }  ?>
    </tr>
</table>

Storing data into list with class

This line is your problem:

lstemail.Add("JOhn","Smith","Los Angeles");

There is no direct cast from 3 strings to your custom class. The compiler has no way of figuring out what you're trying to do with this line. You need to Add() an instance of the class to lstemail:

lstemail.Add(new EmailData { FirstName = "JOhn", LastName = "Smith", Location = "Los Angeles" });

Sorting a Data Table

private void SortDataTable(DataTable dt, string sort)
{
DataTable newDT = dt.Clone();
int rowCount = dt.Rows.Count;

DataRow[] foundRows = dt.Select(null, sort);
// Sort with Column name
for (int i = 0; i < rowCount; i++)
{
object[] arr = new object[dt.Columns.Count];
for (int j = 0; j < dt.Columns.Count; j++)
{
arr[j] = foundRows[i][j];
}
DataRow data_row = newDT.NewRow();
data_row.ItemArray = arr;
newDT.Rows.Add(data_row);
}

//clear the incoming dt
dt.Rows.Clear();

for (int i = 0; i < newDT.Rows.Count; i++)
{
object[] arr = new object[dt.Columns.Count];
for (int j = 0; j < dt.Columns.Count; j++)
{
arr[j] = newDT.Rows[i][j];
}

DataRow data_row = dt.NewRow();
data_row.ItemArray = arr;
dt.Rows.Add(data_row);
}
}

How to change ProgressBar's progress indicator color in Android

If you only want to change the progress bar color, you can simply use a color filter in your Activity's onCreate() method:

ProgressBar progressbar = (ProgressBar) findViewById(R.id.progressbar);
int color = 0xFF00FF00;
progressbar.getIndeterminateDrawable().setColorFilter(color, PorterDuff.Mode.SRC_IN);
progressbar.getProgressDrawable().setColorFilter(color, PorterDuff.Mode.SRC_IN);

Idea from here.

You only need to do this for pre-lollipop versions. On Lollipop you can use the colorAccent style attribute.

jQuery 'each' loop with JSON array

My solutions in one of my own sites, with a table:

$.getJSON("sections/view_numbers_update.php", function(data) {
 $.each(data, function(index, objNumber) {
  $('#tr_' + objNumber.intID).find("td").eq(3).html(objNumber.datLastCalled);
  $('#tr_' + objNumber.intID).find("td").eq(4).html(objNumber.strStatus);
  $('#tr_' + objNumber.intID).find("td").eq(5).html(objNumber.intDuration);
  $('#tr_' + objNumber.intID).find("td").eq(6).html(objNumber.blnWasHuman);
 });
});

sections/view_numbers_update.php Returns something like:

[{"intID":"19","datLastCalled":"Thu, 10 Jan 13 08:52:20 +0000","strStatus":"Completed","intDuration":"0:04 secs","blnWasHuman":"Yes","datModified":1357807940},
{"intID":"22","datLastCalled":"Thu, 10 Jan 13 08:54:43 +0000","strStatus":"Completed","intDuration":"0:00 secs","blnWasHuman":"Yes","datModified":1357808079}]

HTML table:

<table id="table_numbers">
 <tr>
  <th>[...]</th>
  <th>[...]</th>
  <th>[...]</th>
  <th>Last Call</th>
  <th>Status</th>
  <th>Duration</th>
  <th>Human?</th>
  <th>[...]</th>
 </tr>
 <tr id="tr_123456">
  [...]
 </tr>
</table>

This essentially gives every row a unique id preceding with 'tr_' to allow for other numbered element ids, at server script time. The jQuery script then just gets this TR_[id] element, and fills the correct indexed cell with the json return.

The advantage is you could get the complete array from the DB, and either foreach($array as $record) to create the table html, OR (if there is an update request) you can die(json_encode($array)) before displaying the table, all in the same page, but same display code.

SQL: How to perform string does not equal

select * from table
where tester NOT LIKE '%username%';

How to delete SQLite database from Android programmatically

The SQLiteDatabase.deleteDatabase(File file) static method was added in API 16. If you want to write apps that support older devices, how do you do this?

I tried: file.delete();

but it messes up SQLiteOpenHelper.

Thanks.

NEVER MIND! I later realized you are using Context.deleteDatabase(). The Context one works great and deletes the journal too. Works for me.

Also, I found I needed to call SQLiteOpenHelp.close() before doing the delete, so that I could then use LoaderManager to recreate it.

How to get the MD5 hash of a file in C++?

You can implement the MD5 algorithm yourself (examples are all over the web), or you can link against the OpenSSL libs and use OpenSSL's digest functions. here's an example to get the MD5 of a byte array:

#include <openssl/md5.h>
QByteArray AESWrapper::md5 ( const QByteArray& data) {
    unsigned char * tmp_hash;
    tmp_hash = MD5((const unsigned char*)data.constData(), data.length(), NULL);
    return QByteArray((const char*)tmp_hash, MD5_DIGEST_LENGTH);
}

Can enums be subclassed to add new elements?

enum A {a,b,c}
enum B extends A {d}
/*B is {a,b,c,d}*/

can be written as:

public enum All {
    a       (ClassGroup.A,ClassGroup.B),
    b       (ClassGroup.A,ClassGroup.B),
    c       (ClassGroup.A,ClassGroup.B),
    d       (ClassGroup.B) 
...

ClassGroup.B.getMembers() contains {a,b,c,d}

How it can be useful: Let say we want something like: We have events and we are using enums. Those enums can be grouped by similar processing. If we have operation with many elements, then some events starts operation, some are just step and other end the operation. To gather such operation and avoid long switch case we can group them as in example and use:

if(myEvent.is(State_StatusGroup.START)) makeNewOperationObject()..
if(myEnum.is(State_StatusGroup.STEP)) makeSomeSeriousChanges()..
if(myEnum.is(State_StatusGroup.FINISH)) closeTransactionOrSomething()..

Example:

public enum AtmOperationStatus {
STARTED_BY_SERVER       (State_StatusGroup.START),
SUCCESS             (State_StatusGroup.FINISH),
FAIL_TOKEN_TIMEOUT      (State_StatusGroup.FAIL, 
                    State_StatusGroup.FINISH),
FAIL_NOT_COMPLETE       (State_StatusGroup.FAIL,
                    State_StatusGroup.STEP),
FAIL_UNKNOWN            (State_StatusGroup.FAIL,
                    State_StatusGroup.FINISH),
(...)

private AtmOperationStatus(StatusGroupInterface ... pList){
    for (StatusGroupInterface group : pList){
        group.addMember(this);
    }
}
public boolean is(StatusGroupInterface with){
    for (AtmOperationStatus eT : with.getMembers()){
        if( eT .equals(this))   return true;
    }
    return false;
}
// Each group must implement this interface
private interface StatusGroupInterface{
    EnumSet<AtmOperationStatus> getMembers();
    void addMember(AtmOperationStatus pE);
}
// DEFINING GROUPS
public enum State_StatusGroup implements StatusGroupInterface{
    START, STEP, FAIL, FINISH;

    private List<AtmOperationStatus> members = new LinkedList<AtmOperationStatus>();

    @Override
    public EnumSet<AtmOperationStatus> getMembers() {
        return EnumSet.copyOf(members);
    }

    @Override
    public void addMember(AtmOperationStatus pE) {
        members.add(pE);
    }
    static { // forcing initiation of dependent enum
        try {
            Class.forName(AtmOperationStatus.class.getName()); 
        } catch (ClassNotFoundException ex) { 
            throw new RuntimeException("Class AtmEventType not found", ex); 
        }
    }
}
}
//Some use of upper code:
if (p.getStatus().is(AtmOperationStatus.State_StatusGroup.FINISH)) {
    //do something
}else if (p.getStatus().is(AtmOperationStatus.State_StatusGroup.START)) {
    //do something      
}

Add some more advanced:

public enum AtmEventType {

USER_DEPOSIT        (Status_EventsGroup.WITH_STATUS,
              Authorization_EventsGroup.USER_AUTHORIZED,
              ChangedMoneyAccountState_EventsGroup.CHANGED,
              OperationType_EventsGroup.DEPOSIT,
              ApplyTo_EventsGroup.CHANNEL),
SERVICE_DEPOSIT     (Status_EventsGroup.WITH_STATUS,
              Authorization_EventsGroup.TERMINAL_AUTHORIZATION,
              ChangedMoneyAccountState_EventsGroup.CHANGED,
              OperationType_EventsGroup.DEPOSIT,
              ApplyTo_EventsGroup.CHANNEL),
DEVICE_MALFUNCTION  (Status_EventsGroup.WITHOUT_STATUS,
              Authorization_EventsGroup.TERMINAL_AUTHORIZATION,
              ChangedMoneyAccountState_EventsGroup.DID_NOT_CHANGED,
              ApplyTo_EventsGroup.DEVICE),
CONFIGURATION_4_C_CHANGED(Status_EventsGroup.WITHOUT_STATUS,
              ApplyTo_EventsGroup.TERMINAL,
              ChangedMoneyAccountState_EventsGroup.DID_NOT_CHANGED),
(...)

At above if we have some fail (myEvent.is(State_StatusGroup.FAIL)) then iterating by previous events we can easily check if we must revert money transfer by:

if(myEvent2.is(ChangedMoneyAccountState_EventsGroup.CHANGED)) rollBack()..

It can be useful for:

including explicite meta-data about processing logic, less to remember

implementing some of multi-inheritance

we don't want to use class structures, ex. for sending short status messages

how to get session id of socket.io client in Client

Try from your code socket.socket.sessionid ie.

    var socket = io.connect('http://localhost');
alert(socket.socket.sessionid);
  var sendBtn= document.getElementById('btnSend');
  sendBtn.onclick= function(){
var userId=document.getElementById('txt1').value;
var userMsg = document.getElementById('txt2').value;
socket.emit('sendto',{username: userId, message: userMsg});
};

  socket.on('news', function (data) {
    console.log(data);
    socket.emit('my other event', { my: 'data' });
  });
  socket.on('message',function(data){ console.log(data);});

How to kill an application with all its activities?

which is stored in the SharesPreferences as long as the application needs it.

Why?

As soon as the user wants to exit, the password in the SharedPreferences should be wiped and of course all activities of the application should be closed (it makes no sense to run them without the known password - they would crash).

Even better: don't put the password in SharedPreferences. Hold onto it in a static data member. The data will naturally go away when all activities in the app are exited (e.g., BACK button) or otherwise destroyed (e.g., kicked out of RAM to make room for other activities sometime after the user pressed HOME).

If you want some sort of proactive "flush password", just set the static data member to null, and have your activities check that member and take appropriate action when it is null.

Can I escape a double quote in a verbatim string literal?

Use a duplicated double quote.

@"this ""word"" is escaped";

outputs:

this "word" is escaped

TimePicker Dialog from clicking EditText

You can use the below code in the onclick listener of edittext

  TimePickerDialog timePickerDialog = new TimePickerDialog(MainActivity.this,
    new TimePickerDialog.OnTimeSetListener() {

        @Override
        public void onTimeSet(TimePicker view, int hourOfDay,
                              int minute) {

            tv_time.setText(hourOfDay + ":" + minute);
        }
    }, hour, minute, false);
     timePickerDialog.show();

You can see the full code at Android timepicker example

<meta charset="utf-8"> vs <meta http-equiv="Content-Type">

I would recommend doing it like this to keep things in line with HTML5.

<meta charset="UTF-8">

EG:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
</body>
</html>

javascript get child by id

If the child is always going to be a specific tag then you could do it like this

function test(el)
{
 var children = el.getElementsByTagName('div');// any tag could be used here..

  for(var i = 0; i< children.length;i++)
  {
    if (children[i].getAttribute('id') == 'child') // any attribute could be used here
    {
     // do what ever you want with the element..  
     // children[i] holds the element at the moment..

    }
  }
}

Disable / Check for Mock Location (prevent gps spoofing)

try this code its very simple and usefull

  public boolean isMockLocationEnabled() {
        boolean isMockLocation = false;
        try {
            //if marshmallow
            if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                AppOpsManager opsManager = (AppOpsManager) getApplicationContext().getSystemService(Context.APP_OPS_SERVICE);
                isMockLocation = (opsManager.checkOp(AppOpsManager.OPSTR_MOCK_LOCATION, android.os.Process.myUid(), BuildConfig.APPLICATION_ID)== AppOpsManager.MODE_ALLOWED);
            } else {
                // in marshmallow this will always return true
                isMockLocation = !android.provider.Settings.Secure.getString(getApplicationContext().getContentResolver(), "mock_location").equals("0");
            }
        } catch (Exception e) {
            return isMockLocation;
        }
        return isMockLocation;
    }

Twitter Bootstrap onclick event on buttons-radio

For Bootstrap 3 the default radio/button-group structure is :

<div class="btn-group" data-toggle="buttons">
    <label class="btn btn-primary">
        <input type="radio" name="options" id="option1"> Option 1
    </label>
    <label class="btn btn-primary">
        <input type="radio" name="options" id="option2"> Option 2
    </label>
    <label class="btn btn-primary">
        <input type="radio" name="options" id="option3"> Option 3
    </label>
</div>

And you can select the active one like this:

$('.btn-primary').on('click', function(){
    alert($(this).find('input').attr('id'));
});

What are the best JVM settings for Eclipse?

-showlocation

To make it easier to have eclipse running twice, and know which workspace you're dealing with

Eclipse 3.6 adds a preferences option to specify what to show for the Workspace name (shown in window title) which works much better than -showlocation for three reasons:

You do not need to restart eclipse for it to take affect.
You can chose a short code.
It appears first, before the perspective and application name.

How is the AND/OR operator represented as in Regular Expressions?

Not an expert in regex, but you can do ^((part1|part2)|(part1, part2))$. In words: "part 1 or part2 or both"

Test a string for a substring

There are several other ways, besides using the in operator (easiest):

index()

>>> try:
...   "xxxxABCDyyyy".index("test")
... except ValueError:
...   print "not found"
... else:
...   print "found"
...
not found

find()

>>> if "xxxxABCDyyyy".find("ABCD") != -1:
...   print "found"
...
found

re

>>> import re
>>> if re.search("ABCD" , "xxxxABCDyyyy"):
...  print "found"
...
found

Mvn install or Mvn package

From the Lifecycle reference, install will run the project's integration tests, package won't.

If you really need to not install the generated artifacts, use at least verify.

How to unmount, unrender or remove a component, from itself in a React/Redux/Typescript notification message

instead of using

ReactDOM.unmountComponentAtNode(ReactDOM.findDOMNode(this).parentNode);

try using

ReactDOM.unmountComponentAtNode(document.getElementById('root'));

Calculating and printing the nth prime number

Although many correct and detailed explanations are available. but here is my C implementation:

#include<stdio.h>
#include<conio.h> 

main()
{
int pk,qd,am,no,c=0;
printf("\n Enter the Number U want to Find");
scanf("%d",&no);
for(pk=2;pk<=1000;pk++)
{
am=0;
for(qd=2;qd<=pk/2;qd++)
{
if(pk%qd==0)
{
am=1;
break;
}}
if(am==0)
c++;
if(c==no)
{
printf("%d",pk);
break;
}}
getch();
return 0;
}

How can I make the browser wait to display the page until it's fully loaded?

in PHP-Fusion Open Source CMS, http://www.php-fusion.co.uk, we do it this way at core -

    <?php
        ob_start();
        // Your PHP codes here            
        ?>
        YOUR HTML HERE


        <?php 
        $html_output = ob_get_contents();
        ob_end_clean();
        echo $html_output;
    ?>

You won't be able to see anything loading one by one. The only loader will be your browser tab spinner, and it just displays everything in an instant after everything is loaded. Give it a try.

This method is fully compliant in html files.

Correct path for img on React.js

Import Images in your component

import RecentProjectImage_3 from '../../asset/image/recent-projects/latest_news_3.jpg'

And call the image name on image src={RecentProjectImage_3} as a object

 <Img src={RecentProjectImage_3} alt="" />

"android.view.WindowManager$BadTokenException: Unable to add window" on buider.show()

android.view.WindowManager$BadTokenException: Unable to add window"

Problem :

This exception occurs when the app is trying to notify the user from the background thread (AsyncTask) by opening a Dialog.

If you are trying to modify the UI from background thread (usually from onPostExecute() of AsyncTask) and if the activity enters finishing stage i.e.) explicitly calling finish(), user pressing home or back button or activity clean up made by Android then you get this error.

Reason :

The reason for this exception is that, as the exception message says, the activity has finished but you are trying to display a dialog with a context of the finished activity. Since there is no window for the dialog to display the android runtime throws this exception.

Solution:

Use isFinishing() method which is called by Android to check whether this activity is in the process of finishing: be it explicit finish() call or activity clean up made by Android. By using this method it is very easy to avoid opening dialog from background thread when activity is finishing.

Also maintain a weak reference for the activity (and not a strong reference so that activity can be destroyed once not needed) and check if the activity is not finishing before performing any UI using this activity reference (i.e. showing a dialog).

eg.

private class chkSubscription extends AsyncTask<String, Void, String>{

  private final WeakReference<login> loginActivityWeakRef;

  public chkSubscription (login loginActivity) {
    super();
    this.loginActivityWeakRef= new WeakReference<login >(loginActivity)
  }

  protected String doInBackground(String... params) {
    //web service call
  }

  protected void onPostExecute(String result) {
    if(page.contains("error")) //when not subscribed
    {
      if (loginActivityWeakRef.get() != null && !loginActivityWeakRef.get().isFinishing()) {
        AlertDialog.Builder builder = new AlertDialog.Builder(login.this);
        builder.setCancelable(true);
        builder.setMessage(sucObject);
        builder.setInverseBackgroundForced(true);

        builder.setNeutralButton("Ok",new DialogInterface.OnClickListener() {
          public void onClick(DialogInterface dialog, int whichButton){
            dialog.dismiss();
          }
        });

        builder.show();
      }
    }
  }
}

Update :

Window Tokens:

As its name implies, a window token is a special type of Binder token that the window manager uses to uniquely identify a window in the system. Window tokens are important for security because they make it impossible for malicious applications to draw on top of the windows of other applications. The window manager protects against this by requiring applications to pass their application's window token as part of each request to add or remove a window. If the tokens don't match, the window manager rejects the request and throws a BadTokenException. Without window tokens, this necessary identification step wouldn't be possible and the window manager wouldn't be able to protect itself from malicious applications.

A real-world scenario:

When an application starts up for the first time, the ActivityManagerService creates a special kind of window token called an application window token, which uniquely identifies the application's top-level container window. The activity manager gives this token to both the application and the window manager, and the application sends the token to the window manager each time it wants to add a new window to the screen. This ensures secure interaction between the application and the window manager (by making it impossible to add windows on top of other applications), and also makes it easy for the activity manager to make direct requests to the window manager.

How to redirect the output of DBMS_OUTPUT.PUT_LINE to a file?

use set serveroutput on;

for example:

set serveroutput on;

DECLARE
x NUMBER;
BEGIN
x := 72600;
dbms_output.put_line('The variable X = '); dbms_output.put_line(x);
END;

How to add click event to a iframe with JQuery

You can use this code to bind click an element which is in iframe.

_x000D_

jQuery('.class_in_iframe',jQuery('[id="id_of_iframe"]')[0].contentWindow.document.body).on('click',function(){ _x000D_
 console.log("triggered !!")_x000D_
});

_x000D_

What is the best way to compare floats for almost-equality in Python?

I would agree that Gareth's answer is probably most appropriate as a lightweight function/solution.

But I thought it would be helpful to note that if you are using NumPy or are considering it, there is a packaged function for this.

numpy.isclose(a, b, rtol=1e-05, atol=1e-08, equal_nan=False)

A little disclaimer though: installing NumPy can be a non-trivial experience depending on your platform.

How to wait for a number of threads to complete?

As an alternative to CountDownLatch you can also use CyclicBarrier e.g.

public class ThreadWaitEx {
    static CyclicBarrier barrier = new CyclicBarrier(100, new Runnable(){
        public void run(){
            System.out.println("clean up job after all tasks are done.");
        }
    });
    public static void main(String[] args) {
        for (int i = 0; i < 100; i++) {
            Thread t = new Thread(new MyCallable(barrier));
            t.start();
        }       
    }

}    

class MyCallable implements Runnable{
    private CyclicBarrier b = null;
    public MyCallable(CyclicBarrier b){
        this.b = b;
    }
    @Override
    public void run(){
        try {
            //do something
            System.out.println(Thread.currentThread().getName()+" is waiting for barrier after completing his job.");
            b.await();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (BrokenBarrierException e) {
            e.printStackTrace();
        }
    }       
}

To use CyclicBarrier in this case barrier.await() should be the last statement i.e. when your thread is done with its job. CyclicBarrier can be used again with its reset() method. To quote javadocs:

A CyclicBarrier supports an optional Runnable command that is run once per barrier point, after the last thread in the party arrives, but before any threads are released. This barrier action is useful for updating shared-state before any of the parties continue.

How to change language of app when user selects language?

all the above @Uday's code is perfect but only one thing is missing(default config in build.gradle)

public void setLocale(String lang) { 
Locale myLocale = new Locale(lang); 
Resources res = getResources(); 
DisplayMetrics dm = res.getDisplayMetrics(); 
Configuration conf = res.getConfiguration(); 
conf.locale = myLocale; 
res.updateConfiguration(conf, dm); 
Intent refresh = new Intent(this, AndroidLocalize.class); 
finish();
startActivity(refresh);

}

Mine was not working just because the languages were not mentioned in the config file(build.gradle)

 defaultConfig {
    resConfigs "en", "hi", "kn"
}

after that, all languages started running

Edit a specific Line of a Text File in C#

When you create a StreamWriter it always create a file from scratch, you will have to create a third file and copy from target and replace what you need, and then replace the old one. But as I can see what you need is XML manipulation, you might want to use XmlDocument and modify your file using Xpath.

COUNT / GROUP BY with active record?

I think you should count the results with FOUND_ROWS() and SQL_CALC_FOUND_ROWS. You'll need two queries: select, group_by, etc. You'll add a plus select: SQL_CALC_FOUND_ROWS user_id. After this query run a query: SELECT FOUND_ROWS(). This will return the desired number.

How do I find the absolute position of an element using jQuery?

.offset() will return the offset position of an element as a simple object, eg:

var position = $(element).offset(); // position = { left: 42, top: 567 }

You can use this return value to position other elements at the same spot:

$(anotherElement).css(position)

How do I escape a string inside JavaScript code inside an onClick handler?

In JavaScript you can encode single quotes as "\x27" and double quotes as "\x22". Therefore, with this method you can, once you're inside the (double or single) quotes of a JavaScript string literal, use the \x27 \x22 with impunity without fear of any embedded quotes "breaking out" of your string.

\xXX is for chars < 127, and \uXXXX for Unicode, so armed with this knowledge you can create a robust JSEncode function for all characters that are out of the usual whitelist.

For example,

<a href="#" onclick="SelectSurveyItem('<% JSEncode(itemid) %>', '<% JSEncode(itemname) %>'); return false;">Select</a>

How to move (and overwrite) all files from one directory to another?

It's just mv srcdir/* targetdir/.

If there are too many files in srcdir you might want to try something like the following approach:

cd srcdir
find -exec mv {} targetdir/ +

In contrast to \; the final + collects arguments in an xargs like manner instead of executing mv once for every file.

What is the best way to remove a table row with jQuery?

You're right:

$('#myTableRow').remove();

This works fine if your row has an id, such as:

<tr id="myTableRow"><td>blah</td></tr>

If you don't have an id, you can use any of jQuery's plethora of selectors.

python multithreading wait till all threads finished

You can have class something like below from which you can add 'n' number of functions or console_scripts you want to execute in parallel passion and start the execution and wait for all jobs to complete..

from multiprocessing import Process

class ProcessParallel(object):
    """
    To Process the  functions parallely

    """    
    def __init__(self, *jobs):
        """
        """
        self.jobs = jobs
        self.processes = []

    def fork_processes(self):
        """
        Creates the process objects for given function deligates
        """
        for job in self.jobs:
            proc  = Process(target=job)
            self.processes.append(proc)

    def start_all(self):
        """
        Starts the functions process all together.
        """
        for proc in self.processes:
            proc.start()

    def join_all(self):
        """
        Waits untill all the functions executed.
        """
        for proc in self.processes:
            proc.join()


def two_sum(a=2, b=2):
    return a + b

def multiply(a=2, b=2):
    return a * b


#How to run:
if __name__ == '__main__':
    #note: two_sum, multiply can be replace with any python console scripts which
    #you wanted to run parallel..
    procs =  ProcessParallel(two_sum, multiply)
    #Add all the process in list
    procs.fork_processes()
    #starts  process execution 
    procs.start_all()
    #wait until all the process got executed
    procs.join_all()

Format a JavaScript string using placeholders and an object of substitutions?

const stringInject = (str = '', obj = {}) => {
  let newStr = str;
  Object.keys(obj).forEach((key) => {
    let placeHolder = `#${key}#`;
    if(newStr.includes(placeHolder)) {
      newStr = newStr.replace(placeHolder, obj[key] || " ");
    }
  });
  return newStr;
}

Input: stringInject("Hi #name#, How are you?", {name: "Ram"});
Output: "Hi Ram, How are you?"

How to change date format (MM/DD/YY) to (YYYY-MM-DD) in date picker

I had the same issue and I have tried many answers but nothing worked.

I tried the following and it worked successfully :

<input type=text  data-date-format='yy-mm-dd'  >

Style input element to fill remaining width of its container

Very easy trick is using a CSS calc formula. All modern browsers, IE9, wide range of mobile browsers should support this.

<div style='white-space:nowrap'>
  <span style='display:inline-block;width:80px;font-weight:bold'>
    <label for='field1'>Field1</label>
  </span>
  <input id='field1' name='field1' type='text' value='Some text' size='30' style='width:calc(100% - 80px)' />
</div>

How can I change the date format in Java?

Or you could go the regex route:

String date = "10/07/2010";
String newDate = date.replaceAll("(\\d+)/(\\d+)/(\\d+)", "$3/$2/$1");
System.out.println(newDate);

It works both ways too. Of course this won't actually validate your date and will also work for strings like "21432/32423/52352". You can use "(\\d{2})/(\\d{2})/(\\d{4}" to be more exact in the number of digits in each group, but it will only work from dd/MM/yyyy to yyyy/MM/dd and not the other way around anymore (and still accepts invalid numbers in there like 45). And if you give it something invalid like "blabla" it will just return the same thing back.

Deserializing JSON data to C# using JSON.NET

Building off of bbant's answer, this is my complete solution for deserializing JSON from a remote URL.

using Newtonsoft.Json;
using System.Net.Http;

namespace Base
{
    public class ApiConsumer<T>
    {
        public T data;
        private string url;

        public CalendarApiConsumer(string url)
        {
            this.url = url;
            this.data = getItems();
        }

        private T getItems()
        {
            T result = default(T);
            HttpClient client = new HttpClient();

            // This allows for debugging possible JSON issues
            var settings = new JsonSerializerSettings
            {
                Error = (sender, args) =>
                {
                    if (System.Diagnostics.Debugger.IsAttached)
                    {
                        System.Diagnostics.Debugger.Break();
                    }
                }
            };

            using (HttpResponseMessage response = client.GetAsync(this.url).Result)
            {
                if (response.IsSuccessStatusCode)
                {
                    result = JsonConvert.DeserializeObject<T>(response.Content.ReadAsStringAsync().Result, settings);
                }
            }
            return result;
        }
    }
}

Usage would be like:

ApiConsumer<FeedResult> feed = new ApiConsumer<FeedResult>("http://example.info/feeds/feeds.aspx?alt=json-in-script");

Where FeedResult is the class generated using the Xamasoft JSON Class Generator

Here is a screenshot of the settings I used, allowing for weird property names which the web version could not account for.

Xamasoft JSON Class Generator

What is the meaning of # in URL and how can I use that?

This is known as the "fragment identifier" and is typically used to identify a portion of an HTML document that sits within a fully qualified URL:

Fragment Identifier Wiki Page

Background service with location listener in android

First you need to create a Service. In that Service, create a class extending LocationListener. For this, use the following code snippet of Service:

public class LocationService extends Service {
public static final String BROADCAST_ACTION = "Hello World";
private static final int TWO_MINUTES = 1000 * 60 * 2;
public LocationManager locationManager;
public MyLocationListener listener;
public Location previousBestLocation = null;

Intent intent;
int counter = 0;

@Override
public void onCreate() {
    super.onCreate();
    intent = new Intent(BROADCAST_ACTION);
}

@Override
public void onStart(Intent intent, int startId) {
    locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    listener = new MyLocationListener();
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        return;
    }
    locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 4000, 0, (LocationListener) listener);
    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 4000, 0, listener);
}

@Override
public IBinder onBind(Intent intent)
{
    return null;
}

protected boolean isBetterLocation(Location location, Location currentBestLocation) {
    if (currentBestLocation == null) {
        // A new location is always better than no location
        return true;
    }

    // Check whether the new location fix is newer or older
    long timeDelta = location.getTime() - currentBestLocation.getTime();
    boolean isSignificantlyNewer = timeDelta > TWO_MINUTES;
    boolean isSignificantlyOlder = timeDelta < -TWO_MINUTES;
    boolean isNewer = timeDelta > 0;

    // If it's been more than two minutes since the current location, use the new location
    // because the user has likely moved
    if (isSignificantlyNewer) {
        return true;
        // If the new location is more than two minutes older, it must be worse
    } else if (isSignificantlyOlder) {
        return false;
    }

    // Check whether the new location fix is more or less accurate
    int accuracyDelta = (int) (location.getAccuracy() - currentBestLocation.getAccuracy());
    boolean isLessAccurate = accuracyDelta > 0;
    boolean isMoreAccurate = accuracyDelta < 0;
    boolean isSignificantlyLessAccurate = accuracyDelta > 200;

    // Check if the old and new location are from the same provider
    boolean isFromSameProvider = isSameProvider(location.getProvider(),
            currentBestLocation.getProvider());

    // Determine location quality using a combination of timeliness and accuracy
    if (isMoreAccurate) {
        return true;
    } else if (isNewer && !isLessAccurate) {
        return true;
    } else if (isNewer && !isSignificantlyLessAccurate && isFromSameProvider) {
        return true;
    }
    return false;
}



/** Checks whether two providers are the same */
private boolean isSameProvider(String provider1, String provider2) {
    if (provider1 == null) {
        return provider2 == null;
    }
    return provider1.equals(provider2);
}



@Override
public void onDestroy() {
    // handler.removeCallbacks(sendUpdatesToUI);     
    super.onDestroy();
    Log.v("STOP_SERVICE", "DONE");
    locationManager.removeUpdates(listener);
}

public static Thread performOnBackgroundThread(final Runnable runnable) {
    final Thread t = new Thread() {
        @Override
        public void run() {
            try {
                runnable.run();
            } finally {

            }
        }
    };
    t.start();
    return t;
}
public class MyLocationListener implements LocationListener
{

    public void onLocationChanged(final Location loc)
    {
        Log.i("*****", "Location changed");
        if(isBetterLocation(loc, previousBestLocation)) {
            loc.getLatitude();
            loc.getLongitude();
            intent.putExtra("Latitude", loc.getLatitude());
            intent.putExtra("Longitude", loc.getLongitude());
            intent.putExtra("Provider", loc.getProvider());
            sendBroadcast(intent);

        }
    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {

    }

    public void onProviderDisabled(String provider)
    {
        Toast.makeText( getApplicationContext(), "Gps Disabled", Toast.LENGTH_SHORT ).show();
    }


    public void onProviderEnabled(String provider)
    {
        Toast.makeText( getApplicationContext(), "Gps Enabled", Toast.LENGTH_SHORT).show();
    }
}

Add this Service any where in your project, the way you want! :)

How to make a list of n numbers in Python and randomly select any number?

Create the list (edited):

count_list = range(1, N+1)

Select random element:

import random
random.choice(count_list)

What is a "method" in Python?

If you think of an object as being similar to a noun, then a method is similar to a verb. Use a method right after an object (i.e. a string or a list) to apply a method's action to it.

How to run TestNG from command line

Ok after 2 days of trying to figure out why I couldn't run the example from

http://www.tutorialspoint.com/testng/testng_environment.htm the following code did not work for me

C:\TestNG_WORKSPACE>java -cp "C:\TestNG_WORKSPACE" org.testng.TestNG testng.xml

The fix for it is as follows: I came to the following conclusion: First off install eclipse, and download the TestNG plugin. After that follow the instructions from the tutorial to create and compile the test class from cmd using javac, and add the testng.xml. To run the testng.xml on windows 10 cmd run the following line:

java -cp C:\Users\Lenovo\Desktop\eclipse\plugins\org.testng.eclipse_6.9.12.201607091356\lib\*;C:\Test org.testng.TestNG testng.xml

to clarify: C:\Users\Lenovo\Desktop\eclipse\plugins\org.testng.eclipse_6.9.12.201607091356\lib\* The path above represents the location of jcommander.jar and testng.jar that you downloaded by installing the TESTNG plugin for eclipse. The path may vary so to be sure just open the installation location of eclipse, go to plugins and search for jcommander.jar. Then copy that location and after that add * to select all the necessary .jars.

C:\Test

The path above represents the location of the testing.xml in your project. After getting all the necessary paths, append them by using ";".

I hope I have been helpful to some of you guys :)

Adding System.Web.Script reference in class library

You need to add a reference to System.Web.Extensions.dll in project for System.Web.Script.Serialization error.

What is the iOS 6 user agent string?

iPhone:

Mozilla/5.0 (iPhone; CPU iPhone OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A5376e Safari/8536.25

iPad:

Mozilla/5.0 (iPad; CPU OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A5376e Safari/8536.25

For a complete list and more details about the iOS user agent check out these 2 resources:
Safari User Agent Strings (http://useragentstring.com/pages/Safari/)
Complete List of iOS User-Agent Strings (http://enterpriseios.com/wiki/UserAgent)

How to redirect output of an already running process

I collected some information on the internet and prepared the script that requires no external tool: See my response here. Hope it's helpful.

How do you determine the size of a file in C?

You can open the file, go to 0 offset relative from the bottom of the file with

#define SEEKBOTTOM   2

fseek(handle, 0, SEEKBOTTOM)

the value returned from fseek is the size of the file.

I didn't code in C for a long time, but I think it should work.

Paging with LINQ for objects

    public LightDataTable PagerSelection(int pageNumber, int setsPerPage, Func<LightDataRow, bool> prection = null)
    {
        this.setsPerPage = setsPerPage;
        this.pageNumber = pageNumber > 0 ? pageNumber - 1 : pageNumber;
        if (!ValidatePagerByPageNumber(pageNumber))
            return this;

        var rowList = rows.Cast<LightDataRow>();
        if (prection != null)
            rowList = rows.Where(prection).ToList();

        if (!rowList.Any())
            return new LightDataTable() { TablePrimaryKey = this.tablePrimaryKey };
        //if (rowList.Count() < (pageNumber * setsPerPage))
        //    return new LightDataTable(new LightDataRowCollection(rowList)) { TablePrimaryKey = this.tablePrimaryKey };

        return new LightDataTable(new LightDataRowCollection(rowList.Skip(this.pageNumber * setsPerPage).Take(setsPerPage).ToList())) { TablePrimaryKey = this.tablePrimaryKey };
  }

this is what i did. Normaly you start at 1 but in IList you start with 0. so if you have 152 rows that mean you have 8 paging but in IList you only have 7. hop this can make thing clear for you

How can I force a hard reload in Chrome for Android

Here is another simple solution that may work when others fail:

Today, a fairly simple developer-side solution worked for me when the caching problem was a cached CSS file. In short: Create a temporary html file copy and browse to it to update the CSS cache.

This trick can refresh the CSS file, at least in Android's blue-globe-iconed default browser (but quite likely its twin, the official Chrome browser, too, and whatever other browsers we encounter on "smart"phones with their trend of aggressive caching).

Details:

At first I tried some of the fairly simple solutions shared here, but without success (for example clearing the recent history of the specific site, but not months and months of it). My latest CSS would however not be applied apon refresh. And that even though I had already employed the version-number-trick in the CSS file-call in the head section of the html which had helped me avoid these pesky aggressive cachings in the past. (example: link rel="stylesheet" href="style.css?v=001" where you upgrade this pseudo-version number every time you make a change to a CSS file, e.g. 001, 002, 003, 004... (should be done in every html file of the site))

This time (August 2019) the CSS file version number update no longer sufficed, nor did some of the simpler measures mentioned here work for me, or I couldn't even find access to some of them (on a borrowed android phone).

In the end I tried something relatively simple that finally solved the problem:

I made a copy of the site's index.html file giving it a different name (indexcopy.html), uploaded it, browsed to it on the Android device, then browsed back to the original page, refreshed it (with the refresh button left of the address bar), and voilà: This time the refresh of index.html finally worked.

Explanation: The latest CSS file version was now finally applied on Android when refreshing the html page in question because the cached copy of the CSS file had now been updated when the CSS file was called from a differently named temporary html page that did not exist anywhere in the browser history and that I could delete again afterwards. The aggressive caching apparently ignored the CSS URL and went instead by the HTML URL, even though it was the CSS file that needed to be updated in the cache.

The 'Access-Control-Allow-Origin' header contains multiple values

I too had both OWIN as well as my WebAPI that both apparently needed CORS enabled separately which in turn created the 'Access-Control-Allow-Origin' header contains multiple values error.

I ended up removing ALL code that enabled CORS and then added the following to the system.webServer node of my Web.Config:

<httpProtocol>
  <customHeaders>
    <add name="Access-Control-Allow-Origin" value="https://stethio.azurewebsites.net" />
    <add name="Access-Control-Allow-Methods" value="GET, POST, OPTIONS, PUT, DELETE" />
    <add name="Access-Control-Allow-Headers" value="Origin, X-Requested-With, Content-Type, Accept, Authorization" />
  </customHeaders>
</httpProtocol>

Doing this satisfied CORS requirements for OWIN (allowing log in) and for WebAPI (allowing API calls), but it created a new problem: an OPTIONS method could not be found during preflight for my API calls. The fix for that was simple--I just needed to remove the following from the handlers node my Web.Config:

<remove name="OPTIONSVerbHandler" />

Hope this helps someone.

Using a string variable as a variable name

You will be much happier using a dictionary instead:

my_data = {}
foo = "hello"
my_data[foo] = "goodbye"
assert my_data["hello"] == "goodbye"

Getting session value in javascript

If you are using VB as code behind, you have to use bracket "()" instead of square bracket "[]".

Example for VB:

<script type="text/javascript">
var accesslevel = '<%= Session("accesslevel").ToString().ToLower() %>';
</script>

What does 'URI has an authority component' mean?

I found out that the URL of the application conflicted with a module in the Sun GlassFish. So, in the file sun-web.xml I renamed the <context-root>/servlets-samples</context-root>.

It is now working.

How to set height property for SPAN

Give it a display:inline-block in CSS - that should let it do what you want.
In terms of compatibility: IE6/7 will work with this, as quirks mode suggests:

IE 6/7 accepts the value only on elements with a natural display: inline.

Why is Spring's ApplicationContext.getBean considered bad?

One of the coolest benefits of using something like Spring is that you don't have to wire your objects together. Zeus's head splits open and your classes appear, fully formed with all of their dependencies created and wired-in, as needed. It's magical and fantastic.

The more you say ClassINeed classINeed = (ClassINeed)ApplicationContext.getBean("classINeed");, the less magic you're getting. Less code is almost always better. If your class really needed a ClassINeed bean, why didn't you just wire it in?

That said, something obviously needs to create the first object. There's nothing wrong with your main method acquiring a bean or two via getBean(), but you should avoid it because whenever you're using it, you're not really using all of the magic of Spring.

Convert spark DataFrame column to python list

See, why this way that you are doing is not working. First, you are trying to get integer from a Row Type, the output of your collect is like this:

>>> mvv_list = mvv_count_df.select('mvv').collect()
>>> mvv_list[0]
Out: Row(mvv=1)

If you take something like this:

>>> firstvalue = mvv_list[0].mvv
Out: 1

You will get the mvv value. If you want all the information of the array you can take something like this:

>>> mvv_array = [int(row.mvv) for row in mvv_list.collect()]
>>> mvv_array
Out: [1,2,3,4]

But if you try the same for the other column, you get:

>>> mvv_count = [int(row.count) for row in mvv_list.collect()]
Out: TypeError: int() argument must be a string or a number, not 'builtin_function_or_method'

This happens because count is a built-in method. And the column has the same name as count. A workaround to do this is change the column name of count to _count:

>>> mvv_list = mvv_list.selectExpr("mvv as mvv", "count as _count")
>>> mvv_count = [int(row._count) for row in mvv_list.collect()]

But this workaround is not needed, as you can access the column using the dictionary syntax:

>>> mvv_array = [int(row['mvv']) for row in mvv_list.collect()]
>>> mvv_count = [int(row['count']) for row in mvv_list.collect()]

And it will finally work!

How to include a font .ttf using CSS?

You can use font face like this:

@font-face {
  font-family:"Name-Of-Font";
  src: url("yourfont.ttf") format("truetype");
}

search in java ArrayList

Personally I rarely write loops myself now when I can get away with it... I use the Jakarta commons libs:

Customer findCustomerByid(final int id){
    return (Customer) CollectionUtils.find(customers, new Predicate() {
        public boolean evaluate(Object arg0) {
            return ((Customer) arg0).getId()==id;
        }
    });
}

Yay! I saved one line!

How to change Status Bar text color in iOS

Answer updated for for Xcode GM Seed:

In Info.plist put View controller-based status bar appearance as NO
In the project, set:
In ViewDidLoad:

[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];

How to append to a file in Node?

Try to use flags: 'a' to append data to a file

 var stream = fs.createWriteStream("udp-stream.log", {'flags': 'a'});
  stream.once('open', function(fd) {
    stream.write(msg+"\r\n");
  });

What does the M stand for in C# Decimal literal notation?

Well, i guess M represent the mantissa. Decimal can be used to save money, but it doesn't mean, decimal only used for money.

How to run Java program in terminal with external library JAR

You can do :

1) javac -cp /path/to/jar/file Myprogram.java

2) java -cp .:/path/to/jar/file Myprogram

So, lets suppose your current working directory in terminal is src/Report/

javac -cp src/external/myfile.jar Reporter.java

java -cp .:src/external/myfile.jar Reporter

Take a look here to setup Classpath

How to split large text file in windows?

you can split using a third party software http://www.hjsplit.org/, for example give yours input that could be upto 9GB and then split, in my case I split 10 MB each

How to Specify Eclipse Proxy Authentication Credentials?

This sometime works, sometime no.

I have installed 1 Eclipse - works.

Installed second - doesn't work.

And I cann't figure why!

After some time may be found a solution.

Need delete all setting for proxy (included credentials). And re-insert for new.

After this for me getting work.

How to convert a string to an integer in JavaScript?

ParseInt() and + are different

parseInt("10.3456") // returns 10

+"10.3456" // returns 10.3456

create multiple tag docker image

You can't create tags with Dockerfiles but you can create multiple tags on your images via the command line.

Use this to list your image ids:

$ docker images

Then tag away:

$ docker tag 9f676bd305a4 ubuntu:13.10
$ docker tag 9f676bd305a4 ubuntu:saucy
$ docker tag eb601b8965b8 ubuntu:raring
...

Arrays.fill with multidimensional array in Java

public static Object[] fillArray(Object[] arr,Object item){
    Arrays.fill(arr, item);
    return arr;
}
Character[][] maze = new Character[10][10];
    fillArray(maze, fillArray(maze[0], '?'));

    for(int i = 0;i<10;i++){
        System.out.println();
        for(int j = 0;j<10;j++){
            System.out.print(maze[i][j]);
        }
    }

i hope this do well

How to master AngularJS?

Please keep an eye on the mailing list for problems/solutions discussed by community members. https://groups.google.com/forum/?fromgroups#!forum/angular . It's been really useful to me.

How to get the wsdl file from a webservice's URL

To download the wsdl from a url using Developer Command Prompt for Visual Studio, run it in Administrator mode and enter the following command:

 svcutil /t:metadata http://[your-service-url-here]

You can now consume the downloaded wsdl in your project as you see fit.

TSQL CASE with if comparison in SELECT statement

Should be:

SELECT registrationDate, 
       (SELECT CASE
        WHEN COUNT(*)< 2 THEN 'Ama'
        WHEN COUNT(*)< 5 THEN 'SemiAma' 
        WHEN COUNT(*)< 7 THEN 'Good'  
        WHEN COUNT(*)< 9 THEN 'Better' 
        WHEN COUNT(*)< 12 THEN 'Best'
        ELSE 'Outstanding'
        END as a FROM Articles 
        WHERE Articles.userId = Users.userId) as ranking,
        (SELECT COUNT(*) 
        FROM Articles 
        WHERE userId = Users.userId) as articleNumber,
hobbies, etc...
FROM USERS

SQL: how to use UNION and order by a specific select?

@Adrian's answer is perfectly suitable, I just wanted to share another way of achieving the same result:

select nvl(a.id, b.id)
from a full outer join b on a.id = b.id
order by b.id;

Split a string by a delimiter in python

When you have two or more (in the example below there're three) elements in the string, then you can use comma to separate these items:

date, time, event_name = ev.get_text(separator='@').split("@")

After this line of code, the three variables will have values from three parts of the variable ev

So, if the variable ev contains this string and we apply separator '@':

Sa., 23. März@19:00@Klavier + Orchester: SPEZIAL

Then, after split operation the variable

date will have value "Sa., 23. März"
time will have value "19:00"
event_name will have value "Klavier + Orchester: SPEZIAL"

how to countdown to a date

In a bootstrap responsive page how to center a div

without display table and without bootstrap , i would rather do that

<div class="container container-table">
    <div class="row vertical-center-row">
        <div class="text-center col-md-4 col-md-offset-4" style="background:red">TEXT</div>
    </div>
</div>


 html, body, .container-table {
    height: 100%;
}
.container-table {
    width:100vw;
  height:150px;
  border:1px solid black;
}
.vertical-center-row {
   margin:auto;
  width:30%;
  padding:63px;
  text-align:center;

}

http://codepen.io/matoeil/pen/PbbWgQ

How to fill a Javascript object literal with many static key/value pairs efficiently?

It works fine with the object literal notation:

var map = { key : { "aaa", "rrr" }, 
            key2: { "bbb", "ppp" } // trailing comma leads to syntax error in IE!
          }

Btw, the common way to instantiate arrays

var array = [];
// directly with values:
var array = [ "val1", "val2", 3 /*numbers may be unquoted*/, 5, "val5" ];

and objects

var object = {};

Also you can do either:

obj.property     // this is prefered but you can also do
obj["property"]  // this is the way to go when you have the keyname stored in a var

var key = "property";
obj[key] // is the same like obj.property

AngularJS: ng-repeat list is not updated when a model element is spliced from the model array

There's an easy way to do that. Very easy. Since I noticed that

$scope.yourModel = [];

removes all $scope.yourModel array list you can do like this

function deleteAnObjectByKey(objects, key) {
    var clonedObjects = Object.assign({}, objects);

     for (var x in clonedObjects)
        if (clonedObjects.hasOwnProperty(x))
             if (clonedObjects[x].id == key)
                 delete clonedObjects[x];

    $scope.yourModel = clonedObjects;
}

The $scope.yourModel will be updated with the clonedObjects.

Hope that helps.

Cannot install node modules that require compilation on Windows 7 x64/VS2012

I solved this problem on windows 8 and windows 10 pro with this tutorial. I try a lot of times to solve this problem with many different solutions, but only worked for me with this: http://www.serverpals.com/blog/building-using-node-gyp-with-visual-studio-express-2015-on-windows-10-pro-x64 I notice that i didn't use nodist to control the node version like this tutorial, I use NVM and worked fine, i don't test this tutorial with nodist. I used node 5.2.0.

Why do we have to normalize the input for an artificial neural network?

There are 2 Reasons why we have to Normalize Input Features before Feeding them to Neural Network:

Reason 1: If a Feature in the Dataset is big in scale compared to others then this big scaled feature becomes dominating and as a result of that, Predictions of the Neural Network will not be Accurate.

Example: In case of Employee Data, if we consider Age and Salary, Age will be a Two Digit Number while Salary can be 7 or 8 Digit (1 Million, etc..). In that Case, Salary will Dominate the Prediction of the Neural Network. But if we Normalize those Features, Values of both the Features will lie in the Range from (0 to 1).

Reason 2: Front Propagation of Neural Networks involves the Dot Product of Weights with Input Features. So, if the Values are very high (for Image and Non-Image Data), Calculation of Output takes a lot of Computation Time as well as Memory. Same is the case during Back Propagation. Consequently, Model Converges slowly, if the Inputs are not Normalized.

Example: If we perform Image Classification, Size of Image will be very huge, as the Value of each Pixel ranges from 0 to 255. Normalization in this case is very important.

Mentioned below are the instances where Normalization is very important:

K-Means
K-Nearest-Neighbours
Principal Component Analysis (PCA)
Gradient Descent

Set default host and port for ng serve in config file

enter image description here

Only one thing you have to do. Type this in in your Command Prompt: ng serve --port 4021 [or any other port you want to assign eg: 5050, 5051 etc ]. No need to do changes in files.

Find first and last day for previous calendar month in SQL Server Reporting Services (VB.Net)

I'm not familiar with SSRS, but you can get the beginning and end of the previous month in VB.Net using the DateTime constructor, like this:

Dim prevMonth As DateTime = yourDate.AddMonths(-1)

Dim prevMonthStart As New DateTime(prevMonth.Year, prevMonth.Month, 1)
Dim prevMonthEnd As New DateTime(prevMonth.Year, prevMonth.Month, DateTime.DaysInMonth(prevMonth.Year, prevMonth.Month))

(yourDate can be any DateTime object, such as DateTime.Today or #12/23/2003#)

How to print out more than 20 items (documents) in MongoDB's shell?

I suggest you to have a ~/.mongorc.js file so you do not have to set the default size everytime.

 # execute in your terminal
 touch ~/.mongorc.js
 echo 'DBQuery.shellBatchSize = 100;' > ~/.mongorc.js
 # add one more line to always prettyprint the ouput
 echo 'DBQuery.prototype._prettyShell = true; ' >> ~/.mongorc.js

To know more about what else you can do, I suggest you to look at this article: http://mo.github.io/2017/01/22/mongo-db-tips-and-tricks.html

What characters are allowed in an email address?

Wikipedia has a good article on this, and the official spec is here. From Wikipdia:

The local-part of the e-mail address may use any of these ASCII characters:

Uppercase and lowercase English letters (a-z, A-Z)

Digits 0 to 9

Characters ! # $ % & ' * + - / = ? ^ _ ` { | } ~

Character . (dot, period, full stop) provided that it is not the first or last character, and provided also that it does not appear two or more times consecutively.

Additionally, quoted-strings (ie: "John Doe"@example.com) are permitted, thus allowing characters that would otherwise be prohibited, however they do not appear in common practice. RFC 5321 also warns that "a host that expects to receive mail SHOULD avoid defining mailboxes where the Local-part requires (or uses) the Quoted-string form".

How to get distinct values for non-key column fields in Laravel?

$users = Users::all()->unique('name');

C# find biggest number

I needed to find a way to do this too, using numbers from different places and not in a collection. I was sure there was a method to do this in c#...though by the looks of it I'm muddling my languages...

Anyway, I ended up writing a couple of generic methods to do it...

    static T Max<T>(params T[] numberItems)
    {
        return numberItems.Max();
    }

    static T Min<T>(params T[] numberItems)
    {
        return numberItems.Min();
    }

...call them this way...

    int intTest = Max(1, 2, 3, 4);
    float floatTest = Min(0f, 255.3f, 12f, -1.2f);

Play local (hard-drive) video file with HTML5 video tag?

Ran in to this problem a while ago. Website couldn't access video file on local PC due to security settings (understandable really) ONLY way I could get around it was to run a webserver on the local PC (server2Go) and all references to the video file from the web were to the localhost/video.mp4

<div id="videoDiv">
     <video id="video" src="http://127.0.0.1:4001/videos/<?php $videoFileName?>" width="70%" controls>
    </div>
<!--End videoDiv-->

Not an ideal solution but worked for me.

Couldn't connect to server 127.0.0.1:27017

I got a similar error but the root cause was different. After installing the mongodb using homebrew. https://docs.mongodb.com/manual/installation/ I have to start the "mongod" service before giving the "mongo" command on terminal.

Android Studio: Module won't show up in "Edit Configuration"

Try,

Files > Sync Project with Gradle Files or Files > Sync with File System Should do the trick.

Swift: declare an empty dictionary

You need to explicitly tell the data type or the type can be inferred when you declare anything in Swift.

Swift 3

The sample below declare a dictionary with key as a Int type and the value as a String type.

Method 1: Initializer

let dic = Dictionary<Int, String>()

Method 2: Shorthand Syntax

let dic = [Int:String]()

Method 3: Dictionary Literal

var dic = [1: "Sample"]
// dic has NOT to be a constant
dic.removeAll()

Getting the location from an IP address

PHP has an extension for that.

From PHP.net:

The GeoIP extension allows you to find the location of an IP address. City, State, Country, Longitude, Latitude, and other information as all, such as ISP and connection type can be obtained with the help of GeoIP.

For example:

$record = geoip_record_by_name($ip);
echo $record['city'];

How to horizontally center an element

Centering: Auto-width Margins

This box is horizontally centered by setting its right and left margin widths to "auto". This is the preferred way to accomplish horizontal centering with CSS and works very well in most browsers with CSS 2 support. Unfortunately, Internet Explorer 5/Windows does not respond to this method - a shortcoming of that browser, not the technique.

There is a simple workaround. (A pause while you fight back the nausea induced by that word.) Ready? Internet Explorer 5/Windows incorrectly applies the CSS "text-align" attribute to block-level elements. Declaring "text-align:center" for the containing block-level element (often the BODY element) horizontally centers the box in Internet Explorer 5/Windows.

There is a side effect of this workaround: the CSS "text-align" attribute is inherited, centering inline content. It is often necessary to explicitly set the "text-align" attribute for the centered box, counteracting the effects of the Internet Explorer 5/Windows workaround. The relevant CSS follows.

body {
    margin: 50px 0px;
    padding: 0px;
    text-align: center;
}

#Content {
    width: 500px;
    margin: 0px auto;
    text-align: left;
    padding: 15px;
    border: 1px dashed #333;
    background-color: #EEE;
}

http://bluerobot.com/web/css/center1.html

How do I inject a controller into another controller in AngularJS

use typescript for your coding, because it's object oriented, strictly typed and easy to maintain the code ...

for more info about typescipt click here

Here one simple example I have created to share data between two controller using Typescript...

module Demo {
//create only one module for single Applicaiton
angular.module('app', []);
//Create a searvie to share the data
export class CommonService {
    sharedData: any;
    constructor() {
        this.sharedData = "send this data to Controller";
    }
}
//add Service to module app
angular.module('app').service('CommonService', CommonService);

//Create One controller for one purpose
export class FirstController {
    dataInCtrl1: any;
    //Don't forget to inject service to access data from service
    static $inject = ['CommonService']
    constructor(private commonService: CommonService) { }
    public getDataFromService() {
        this.dataInCtrl1 = this.commonService.sharedData;
    }
}
//add controller to module app
angular.module('app').controller('FirstController', FirstController);
export class SecondController {
    dataInCtrl2: any;
    static $inject = ['CommonService']
    constructor(private commonService: CommonService) { }
    public getDataFromService() {
        this.dataInCtrl2 = this.commonService.sharedData;
    }
}
angular.module('app').controller('SecondController', SecondController);

}

Perl - If string contains text?

if ($string =~ m/something/) {
   # Do work
}

Where something is a regular expression.

IN-clause in HQL or Java Persistence Query Language

Using pure JPA with Hibernate 5.0.2.Final as the actual provider the following seems to work with positional parameters as well:

Entity.java:

@Entity
@NamedQueries({
    @NamedQuery(name = "byAttributes", query = "select e from Entity e where e.attribute in (?1)") })
public class Entity {
    @Column(name = "attribute")
    private String attribute;
}

Dao.java:

public class Dao {
    public List<Entity> findByAttributes(Set<String> attributes) {
        Query query = em.createNamedQuery("byAttributes");
        query.setParameter(1, attributes);

        List<Entity> entities = query.getResultList();
        return entities;
    }
}

When should I use File.separator and when File.pathSeparator?

You use separator when you are building a file path. So in unix the separator is /. So if you wanted to build the unix path /var/temp you would do it like this:

String path = File.separator + "var"+ File.separator + "temp"

You use the pathSeparator when you are dealing with a list of files like in a classpath. For example, if your app took a list of jars as argument the standard way to format that list on unix is: /path/to/jar1.jar:/path/to/jar2.jar:/path/to/jar3.jar

So given a list of files you would do something like this:

String listOfFiles = ...
String[] filePaths = listOfFiles.split(File.pathSeparator);

How to use "svn export" command to get a single file from the repository?

You don't have to do this locally either. You can do it through a remote repository, for example:

svn export http://<repo>/process/test.txt /path/to/code/

Converting list to *args when calling function

yes, using *arg passing args to a function will make python unpack the values in arg and pass it to the function.

so:

>>> def printer(*args):
 print args


>>> printer(2,3,4)
(2, 3, 4)
>>> printer(*range(2, 5))
(2, 3, 4)
>>> printer(range(2, 5))
([2, 3, 4],)
>>>

jQuery click anywhere in the page except on 1 div

I know that this question has been answered, And all the answers are nice. But I wanted to add my two cents to this question for people who have similar (but not exactly the same) problem.

In a more general way, we can do something like this:

$('body').click(function(evt){    
    if(!$(evt.target).is('#menu_content')) {
        //event handling code
    }
});

This way we can handle not only events fired by anything except element with id menu_content but also events that are fired by anything except any element that we can select using CSS selectors.

For instance in the following code snippet I am getting events fired by any element except all <li> elements which are descendants of div element with id myNavbar.

$('body').click(function(evt){    
    if(!$(evt.target).is('div#myNavbar li')) {
        //event handling code
    }
});

How does Python's super() work with multiple inheritance?

In python 3.5+ inheritance looks predictable and very nice for me. Please looks at this code:

class Base(object):
  def foo(self):
    print("    Base(): entering")
    print("    Base(): exiting")


class First(Base):
  def foo(self):
    print("   First(): entering Will call Second now")
    super().foo()
    print("   First(): exiting")


class Second(Base):
  def foo(self):
    print("  Second(): entering")
    super().foo()
    print("  Second(): exiting")


class Third(First, Second):
  def foo(self):
    print(" Third(): entering")
    super().foo()
    print(" Third(): exiting")


class Fourth(Third):
  def foo(self):
    print("Fourth(): entering")
    super().foo()
    print("Fourth(): exiting")

Fourth().foo()
print(Fourth.__mro__)

Outputs:

Fourth(): entering
 Third(): entering
   First(): entering Will call Second now
  Second(): entering
    Base(): entering
    Base(): exiting
  Second(): exiting
   First(): exiting
 Third(): exiting
Fourth(): exiting
(<class '__main__.Fourth'>, <class '__main__.Third'>, <class '__main__.First'>, <class '__main__.Second'>, <class '__main__.Base'>, <class 'object'>)

As you can see, it calls foo exactly ONE time for each inherited chain in the same order as it was inherited. You can get that order by calling .mro :

Fourth -> Third -> First -> Second -> Base -> object

How do I concatenate const/literal strings in C?

Do not forget to initialize the output buffer. The first argument to strcat must be a null terminated string with enough extra space allocated for the resulting string:

char out[1024] = ""; // must be initialized
strcat( out, null_terminated_string ); 
// null_terminated_string has less than 1023 chars

How to crop an image using PIL?

(left, upper, right, lower) means two points,

(left, upper)
(right, lower)

with an 800x600 pixel image, the image's left upper point is (0, 0), the right lower point is (800, 600).

So, for cutting the image half:

from PIL import Image
img = Image.open("ImageName.jpg")

img_left_area = (0, 0, 400, 600)
img_right_area = (400, 0, 800, 600)

img_left = img.crop(img_left_area)
img_right = img.crop(img_right_area)

img_left.show()
img_right.show()

Coordinate System

The Python Imaging Library uses a Cartesian pixel coordinate system, with (0,0) in the upper left corner. Note that the coordinates refer to the implied pixel corners; the centre of a pixel addressed as (0, 0) actually lies at (0.5, 0.5).

Coordinates are usually passed to the library as 2-tuples (x, y). Rectangles are represented as 4-tuples, with the upper left corner given first. For example, a rectangle covering all of an 800x600 pixel image is written as (0, 0, 800, 600).

How to convert date to timestamp in PHP?

<?php echo date('U') ?>

If you want, put it in a MySQL input type timestamp. The above works very well (only in PHP 5 or later):

<?php $timestamp_for_mysql = date('c') ?>

How do I remove all .pyc files from a project?

find . -name '*.pyc' -delete

Surely the simplest.

How to download and save a file from Internet using Java?

There are many elegant and efficient answers here. But the conciseness can make us lose some useful information. In particular, one often does not want to consider a connection error an Exception, and one might want to treat differently some kind of network-related errors - for example, to decide if we should retry the download.

Here's a method that does not throw Exceptions for network errors (only for truly exceptional problems, as malformed url or problems writing to the file)

/**
 * Downloads from a (http/https) URL and saves to a file. 
 * Does not consider a connection error an Exception. Instead it returns:
 *  
 *    0=ok  
 *    1=connection interrupted, timeout (but something was read)
 *    2=not found (FileNotFoundException) (404) 
 *    3=server error (500...) 
 *    4=could not connect: connection timeout (no internet?) java.net.SocketTimeoutException
 *    5=could not connect: (server down?) java.net.ConnectException
 *    6=could not resolve host (bad host, or no internet - no dns)
 * 
 * @param file File to write. Parent directory will be created if necessary
 * @param url  http/https url to connect
 * @param secsConnectTimeout Seconds to wait for connection establishment
 * @param secsReadTimeout Read timeout in seconds - trasmission will abort if it freezes more than this 
 * @return See above
 * @throws IOException Only if URL is malformed or if could not create the file
 */
public static int saveUrl(final Path file, final URL url, 
  int secsConnectTimeout, int secsReadTimeout) throws IOException {
    Files.createDirectories(file.getParent()); // make sure parent dir exists , this can throw exception
    URLConnection conn = url.openConnection(); // can throw exception if bad url
    if( secsConnectTimeout > 0 ) conn.setConnectTimeout(secsConnectTimeout * 1000);
    if( secsReadTimeout > 0 ) conn.setReadTimeout(secsReadTimeout * 1000);
    int ret = 0;
    boolean somethingRead = false;
    try (InputStream is = conn.getInputStream()) {
        try (BufferedInputStream in = new BufferedInputStream(is); OutputStream fout = Files
                .newOutputStream(file)) {
            final byte data[] = new byte[8192];
            int count;
            while((count = in.read(data)) > 0) {
                somethingRead = true;
                fout.write(data, 0, count);
            }
        }
    } catch(java.io.IOException e) { 
        int httpcode = 999;
        try {
            httpcode = ((HttpURLConnection) conn).getResponseCode();
        } catch(Exception ee) {}
        if( somethingRead && e instanceof java.net.SocketTimeoutException ) ret = 1;
        else if( e instanceof FileNotFoundException && httpcode >= 400 && httpcode < 500 ) ret = 2; 
        else if( httpcode >= 400 && httpcode < 600 ) ret = 3; 
        else if( e instanceof java.net.SocketTimeoutException ) ret = 4; 
        else if( e instanceof java.net.ConnectException ) ret = 5; 
        else if( e instanceof java.net.UnknownHostException ) ret = 6;  
        else throw e;
    }
    return ret;
}

How to add fonts to create-react-app based projects?

Go to Google Fonts https://fonts.google.com/
Select your font as depicted in image below:

Copy and then paste that url in new tab you will get the css code to add that font. In this case if you go to

https://fonts.googleapis.com/css?family=Spicy+Rice

It will open like this:

4, Copy and paste that code in your style.css and simply start using that font like this:

      <Typography
          variant="h1"
          gutterBottom
          style={{ fontFamily: "Spicy Rice", color: "pink" }}
        >
          React Rock
        </Typography>

Result:

When do I need to use Begin / End Blocks and the Go keyword in SQL Server?

After wrestling with this problem today my opinion is this: BEGIN...END brackets code just like {....} does in C languages, e.g. code blocks for if...else and loops

GO is (must be) used when succeeding statements rely on an object defined by a previous statement. USE database is a good example above, but the following will also bite you:

alter table foo add bar varchar(8);
-- if you don't put GO here then the following line will error as it doesn't know what bar is.
update foo set bar = 'bacon';
-- need a GO here to tell the interpreter to execute this statement, otherwise the Parser will lump it together with all successive statements.

It seems to me the problem is this: the SQL Server SQL Parser, unlike the Oracle one, is unable to realise that you're defining a new symbol on the first line and that it's ok to reference in the following lines. It doesn't "see" the symbol until it encounters a GO token which tells it to execute the preceding SQL since the last GO, at which point the symbol is applied to the database and becomes visible to the parser.

Why it doesn't just treat the semi-colon as a semantic break and apply statements individually I don't know and wish it would. Only bonus I can see is that you can put a print() statement just before the GO and if any of the statements fail the print won't execute. Lot of trouble for a minor gain though.

Read CSV file column by column

We can use the core java stuff alone to read the CVS file column by column. Here is the sample code I have wrote for my requirement. I believe that it will help for some one.

 BufferedReader br = new BufferedReader(new FileReader(csvFile));
    String line = EMPTY;
    int lineNumber = 0;

    int productURIIndex = -1;
    int marketURIIndex = -1;
    int ingredientURIIndex = -1;
    int companyURIIndex = -1;

    // read comma separated file line by line
    while ((line = br.readLine()) != null) {
        lineNumber++;
        // use comma as line separator
        String[] splitStr = line.split(COMMA);
        int splittedStringLen = splitStr.length;

        // get the product title and uri column index by reading csv header
        // line
        if (lineNumber == 1) {
            for (int i = 0; i < splittedStringLen; i++) {
                if (splitStr[i].equals(PRODUCTURI_TITLE)) {
                    productURIIndex = i;
                    System.out.println("product_uri index:" + productURIIndex);
                }

                if (splitStr[i].equals(MARKETURI_TITLE)) {
                    marketURIIndex = i;
                    System.out.println("marketURIIndex:" + marketURIIndex);
                }

                if (splitStr[i].equals(COMPANYURI_TITLE)) {
                    companyURIIndex = i;
                    System.out.println("companyURIIndex:" + companyURIIndex);
                }

                if (splitStr[i].equals(INGREDIENTURI_TITLE)) {
                    ingredientURIIndex = i;
                    System.out.println("ingredientURIIndex:" + ingredientURIIndex);
                }
            }
        } else {
            if (splitStr != null) {
                String conditionString = EMPTY;
                // avoiding arrayindexoutboundexception when the line
                // contains only ,,,,,,,,,,,,,
                for (String s : splitStr) {
                    conditionString = s;
                }
                if (!conditionString.equals(EMPTY)) {
                    if (productURIIndex != -1) {
                        productCVSUriList.add(splitStr[productURIIndex]);
                    }
                    if (companyURIIndex != -1) {
                        companyCVSUriList.add(splitStr[companyURIIndex]);
                    }
                    if (marketURIIndex != -1) {
                        marketCVSUriList.add(splitStr[marketURIIndex]);
                    }
                    if (ingredientURIIndex != -1) {
                        ingredientCVSUriList.add(splitStr[ingredientURIIndex]);
                    }
                }
            }
        }

How to do multiple arguments to map function where one remains the same in python?

Map can contain multiple arguments, the standard way is

map(add, a, b)

In your question, it should be

map(add, a, [2]*len(a))

Window.Open with PDF stream instead of PDF location

Note: I have verified this in the latest version of IE, and other browsers like Mozilla and Chrome and this works for me. Hope it works for others as well.

if (data == "" || data == undefined) {
    alert("Falied to open PDF.");
} else { //For IE using atob convert base64 encoded data to byte array
    if (window.navigator && window.navigator.msSaveOrOpenBlob) {
        var byteCharacters = atob(data);
        var byteNumbers = new Array(byteCharacters.length);
        for (var i = 0; i < byteCharacters.length; i++) {
            byteNumbers[i] = byteCharacters.charCodeAt(i);
        }
        var byteArray = new Uint8Array(byteNumbers);
        var blob = new Blob([byteArray], {
            type: 'application/pdf'
        });
        window.navigator.msSaveOrOpenBlob(blob, fileName);
    } else { // Directly use base 64 encoded data for rest browsers (not IE)
        var base64EncodedPDF = data;
        var dataURI = "data:application/pdf;base64," + base64EncodedPDF;
        window.open(dataURI, '_blank');
    }

}

Optional args in MATLAB functions

A good way of going about this is not to use nargin, but to check whether the variables have been set using exist('opt', 'var').

Example:

function [a] = train(x, y, opt)
    if (~exist('opt', 'var'))
        opt = true;
    end
end

See this answer for pros of doing it this way: How to check whether an argument is supplied in function call?

jQuery AJAX Call to PHP Script with JSON Return

Your datatype is wrong, change datatype for dataType.

Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect)

I had the this problem on my project.

After I implemented optimistic locking, I got the same exception. My mistake was that I did not remove the setter of the field that became the @Version. As the setter was being called in java space, the value of the field did not match the one generated by the DB anymore. So basically the version fields did not match anymore. At that point any modification on the entity resulted in:

org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect)

I am using H2 in memory DB and Hibernate.

Regex that accepts only numbers (0-9) and NO characters

Your regex ^[0-9] matches anything beginning with a digit, including strings like "1A". To avoid a partial match, append a $ to the end:

^[0-9]*$

This accepts any number of digits, including none. To accept one or more digits, change the * to +. To accept exactly one digit, just remove the *.

UPDATE: You mixed up the arguments to IsMatch. The pattern should be the second argument, not the first:

if (!System.Text.RegularExpressions.Regex.IsMatch(textbox.Text, "^[0-9]*$"))

CAUTION: In JavaScript, \d is equivalent to [0-9], but in .NET, \d by default matches any Unicode decimal digit, including exotic fare like ? (Myanmar 2) and ? (N'Ko 9). Unless your app is prepared to deal with these characters, stick with [0-9] (or supply the RegexOptions.ECMAScript flag).

Localhost not working in chrome and firefox

Steps

Search IIS In Visual Studio 2015
Chose (Use the 64 bit of version of IIS Express for web site and project )

How should I escape strings in JSON?

org.json.JSONObject quote(String data) method does the job

import org.json.JSONObject;
String jsonEncodedString = JSONObject.quote(data);

Extract from the documentation:

Encodes data as a JSON string. This applies quotes and any necessary character escaping. [...] Null will be interpreted as an empty string

How can I find out a file's MIME type (Content-Type)?

Use file. Examples:

> file --mime-type image.png
image.png: image/png

> file -b --mime-type image.png
image/png

> file -i FILE_NAME
image.png: image/png; charset=binary

Allow User to input HTML in ASP.NET MVC - ValidateInput or AllowHtml

URL Encoding the data works as well for me

For example

var data = '<b>Hello</b>'

In Browser call encodeURIComponent(data) before posting

On Server call HttpUtility.UrlDecode(received_data) to decode

That way you can control exactly which fields area allowed to have html

'router-outlet' is not a known element

In my case it happen because RouterModule was missed in the import.

contenteditable change events

Using DOMCharacterDataModified under MutationEvents will lead to the same. The timeout is setup to prevent sending incorrect values (e.g. in Chrome I had some issues with space key)

var timeoutID;
$('[contenteditable]').bind('DOMCharacterDataModified', function() {
    clearTimeout(timeoutID);
    $that = $(this);
    timeoutID = setTimeout(function() {
        $that.trigger('change')
    }, 50)
});
$('[contentEditable]').bind('change', function() {
    console.log($(this).text());
})

JSFIDDLE example

JavaScript split String with white space

You could split the string on the whitespace and then re-add it, since you know its in between every one of the entries.

var string = "text to split";
    string = string.split(" ");
var stringArray = new Array();
for(var i =0; i < string.length; i++){
    stringArray.push(string[i]);
    if(i != string.length-1){
        stringArray.push(" ");
    }
}

Update: Removed trailing space.

sending mail from Batch file

PowerShell comes with a built in command for it. So running directly from a .bat file:

powershell -ExecutionPolicy ByPass -Command Send-MailMessage ^
    -SmtpServer server.address.name ^
    -To [email protected] ^
    -From [email protected] ^
    -Subject Testing ^
    -Body 123

_{NB -ExecutionPolicy ByPass is only needed if you haven't set up permissions for running PS from CMD}

_{Also for those looking to call it from within powershell, drop everything before -Command [inclusive], and ` will be your escape character (not ^)}

How to add to the PYTHONPATH in Windows, so it finds my modules/packages?

You need to add to your PYTHONPATH variable instead of Windows PATH variable.

http://docs.python.org/using/windows.html

How to execute a Windows command on a remote PC?

This can be done by using PsExec which can be downloaded here

psexec \\computer_name -u username -p password ipconfig

If this isn't working try doing this :-

Open RegEdit on your remote server.
Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System.
Add a new DWORD value called LocalAccountTokenFilterPolicy
Set its value to 1.
Reboot your remote server.
Try running PSExec again from your local server.

What are the differences between "=" and "<-" assignment operators in R?

x = y = 5 is equivalent to x = (y = 5), because the assignment operators "group" right to left, which works. Meaning: assign 5 to y, leaving the number 5; and then assign that 5 to x.

This is not the same as (x = y) = 5, which doesn't work! Meaning: assign the value of y to x, leaving the value of y; and then assign 5 to, umm..., what exactly?

When you mix the different kinds of assignment operators, <- binds tighter than =. So x = y <- 5 is interpreted as x = (y <- 5), which is the case that makes sense.

Unfortunately, x <- y = 5 is interpreted as (x <- y) = 5, which is the case that doesn't work!

See ?Syntax and ?assignOps for the precedence (binding) and grouping rules.

Subtract two variables in Bash

Try this Bash syntax instead of trying to use an external program expr:

count=$((FIRSTV-SECONDV))

BTW, the correct syntax of using expr is:

count=$(expr $FIRSTV - $SECONDV)

But keep in mind using expr is going to be slower than the internal Bash syntax I provided above.

Writing MemoryStream to Response Object

First We Need To Write into our Memory Stream and then with the help of Memory Stream method "WriteTo" we can write to the Response of the Page as shown in the below code.

   MemoryStream filecontent = null;
   filecontent =//CommonUtility.ExportToPdf(inputXMLtoXSLT);(This will be your MemeoryStream Content)
   Response.ContentType = "image/pdf";
   string headerValue = string.Format("attachment; filename={0}", formName.ToUpper() + ".pdf");
   Response.AppendHeader("Content-Disposition", headerValue);

   filecontent.WriteTo(Response.OutputStream);

   Response.End();

FormName is the fileName given,This code will make the generated PDF file downloadable by invoking a PopUp.

What is the use of <<<EOD in PHP?

That is not HTML, but PHP. It is called the HEREDOC string method, and is an alternative to using quotes for writing multiline strings.

The HTML in your example will be:

    <tr>
      <td>TEST</td>
    </tr>

Read the PHP documentation that explains it.

How to set caret(cursor) position in contenteditable element (div)?

_x000D_

function set_mouse() {_x000D_
  var as = document.getElementById("editable");_x000D_
  el = as.childNodes[1].childNodes[0]; //goal is to get ('we') id to write (object Text) because it work only in object text_x000D_
  var range = document.createRange();_x000D_
  var sel = window.getSelection();_x000D_
  range.setStart(el, 1);_x000D_
  range.collapse(true);_x000D_
  sel.removeAllRanges();_x000D_
  sel.addRange(range);_x000D_
_x000D_
  document.getElementById("we").innerHTML = el; // see out put of we id_x000D_
}

_x000D_

<div id="editable" contenteditable="true">dddddddddddddddddddddddddddd_x000D_
  <p>dd</p>psss_x000D_
  <p>dd</p>_x000D_
  <p>dd</p>_x000D_
  <p>text text text</p>_x000D_
</div>_x000D_
<p id='we'></p>_x000D_
<button onclick="set_mouse()">focus</button>

_x000D_

It is very hard set caret in proper position when you have advance element like (p) (span) etc. The goal is to get (object text):

<div id="editable" contenteditable="true">dddddddddddddddddddddddddddd<p>dd</p>psss<p>dd</p>
    <p>dd</p>
    <p>text text text</p>
</div>
<p id='we'></p>
<button onclick="set_mouse()">focus</button>
<script>

    function set_mouse() {
        var as = document.getElementById("editable");
        el = as.childNodes[1].childNodes[0];//goal is to get ('we') id to write (object Text) because it work only in object text
        var range = document.createRange();
        var sel = window.getSelection();
        range.setStart(el, 1);
        range.collapse(true);
        sel.removeAllRanges();
        sel.addRange(range);

        document.getElementById("we").innerHTML = el;// see out put of we id
    }
</script>

How to redirect output of systemd service to a file

If you have a newer distro with a newer systemd (systemd version 236 or newer), you can set the values of StandardOutput or StandardError to file:YOUR_ABSPATH_FILENAME.

Long story:

In newer versions of systemd there is a relatively new option (the github request is from 2016 ish and the enhancement is merged/closed 2017 ish) where you can set the values of StandardOutput or StandardError to file:YOUR_ABSPATH_FILENAME. The file:path option is documented in the most recent systemd.exec man page.

This new feature is relatively new and so is not available for older distros like centos-7 (or any centos before that).

How do you calculate the variance, median, and standard deviation in C++ or Java?

To calculate the mean, loop through the list/array of numbers, keeping track of the partial sums and the length. Then return the sum/length.

double sum = 0.0;
int length = 0;

for( double number : numbers ) {
    sum += number;
    length++;
}

return sum/length;

Variance is calculated similarly. Standard deviation is simply the square root of the variance:

double stddev = Math.sqrt( variance );

Stack array using pop() and push()

Here is an example of implementing stack in java (Array Based implementation):

public class MyStack extends Throwable{

/**
 * 
 */
private static final long serialVersionUID = -4433344892390700337L;

protected static int top = -1;
protected static int capacity;
protected static int size;

public int stackDatas[] = null;

public MyStack(){
    stackDatas = new int[10];
    capacity = stackDatas.length;
}

public static int size(){

    if(top < 0){
        size = top + 1;
        return size;
    }
    size = top+1;
    return size; 
}

public void push(int data){
    if(capacity == size()){
        System.out.println("no memory");
    }else{
        stackDatas[++top] = data;
    }
}

public boolean topData(){
    if(top < 0){
        return true;
    }else{
        System.out.println(stackDatas[top]);
        return false;
    }
}

public void pop(){
    if(top < 0){
        System.out.println("stack is empty");
    }else{
        int temp = stackDatas[top];
        stackDatas = ArrayUtils.remove(stackDatas, top--);
        System.out.println("poped data---> "+temp);
    }
}

public String toString(){
    String result = "[";

    if(top<0){
        return "[]";
    }else{


    for(int i = 0; i< size(); i++){
        result = result + stackDatas[i] +",";
    }
    }

    return result.substring(0, result.lastIndexOf(",")) +"]";
 }
}

calling MyStack:

    public class CallingMyStack {

public static MyStack ms;

public static void main(String[] args) {

    ms = new MyStack();
    ms.push(1);
    ms.push(2);
    ms.push(3);
    ms.push(4);
    ms.push(5);
    ms.push(6);
    ms.push(7);
    ms.push(8);
    ms.push(9);
    ms.push(10);
    System.out.println("size: "+MyStack.size());
    System.out.println("List---> "+ms);
    System.out.println("----------");
    ms.pop();
    ms.pop();
    ms.pop();
    ms.pop();
    System.out.println("List---> "+ms);
    System.out.println("size: "+MyStack.size());

 }
}

output:

size: 10
List---> [1,2,3,4,5,6,7,8,9,10]
----------
poped data---> 10
poped data---> 9
poped data---> 8
poped data---> 7
List---> [1,2,3,4,5,6]
size: 6

"SMTP Error: Could not authenticate" in PHPMailer

I received the same error and in mycase it was the password. My password has special characters for and if you supply the password without escaping the special characters the error will continue to show. E.g $mail->Password = " por$ch3"; is valid but will not work using the code above . The solution should be as follows: $mail->Password = "por\$ch3"; Note the Backslash I placed before the dollar character within my password. That should work if you have a password using special characters

How do I call ::CreateProcess in c++ to launch a Windows executable?

if your exe happens to be a console app, you might be interested in reading the stdout and stderr -- for that, I'll humbly refer you to this example:

http://support.microsoft.com/default.aspx?scid=kb;EN-US;q190351

It's a bit of a mouthful of code, but I've used variations of this code to spawn and read.

Maximum number of rows of CSV data in excel sheet

CSV files have no limit of rows you can add to them. Excel won't hold more that the 1 million lines of data if you import a CSV file having more lines.

Excel will actually ask you whether you want to proceed when importing more than 1 million data rows. It suggests to import the remaining data by using the text import wizard again - you will need to set the appropriate line offset.

How do I restrict my EditText input to numerical (possibly decimal and signed) input?

TO set the input type of EditText as decimal use this code:

EditText edit = new EditText(this);
edit.SetRawInputType(Android.Text.InputTypes.NumberFlagDecimal | Android.Text.InputTypes.ClassNumber);

How can I declare a Boolean parameter in SQL statement?

SQL Server recognizes 'TRUE' and 'FALSE' as bit values. So, use a bit data type!

declare @var bit
set @var = 'true'
print @var

That returns 1.

How to view the assembly behind the code using Visual C++?

The easiest way is to fire the debugger and check the disassembly window.

string.split - by multiple character delimiter

More fast way using directly a no-string array but a string:

string[] StringSplit(string StringToSplit, string Delimitator)
{
    return StringToSplit.Split(new[] { Delimitator }, StringSplitOptions.None);
}

StringSplit("E' una bella giornata oggi", "giornata");
/* Output
[0] "E' una bella giornata"
[1] " oggi"
*/

Is Java RegEx case-insensitive?

You also can lead your initial string, which you are going to check for pattern matching, to lower case. And use in your pattern lower case symbols respectively.

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

In my case the error was appearing because I had uploaded the whole folder, containing the website files, into the container.

I solved it by moving all the files outside the folder, right into the container.

Deny all, allow only one IP through htaccess

This can be improved by using the directive designed for that task.

ErrorDocument 403 /specific_page.html
Order Allow,Deny
Allow from 111.222.333.444

Where 111.222.333.444 is your static IP address.

When using the "Order Allow,Deny" directive the requests must match either Allow or Deny, if neither is met, the request is denied.

http://httpd.apache.org/docs/2.2/mod/mod_authz_host.html#order

How do I set the selenium webdriver get timeout?

I find that the timeout calls are not reliable enough in real life, particularly for internet explorer , however the following solutions may be of help:

You can timeout the complete test by using @Test(timeout=10000) in the junit test that you are running the selenium process from. This will free up the main thread for executing the other tests, instead of blocking up the whole show. However even this does not work at times.
Anyway by timing out you do not intend to salvage the test case, because timing out even a single operation might leave the entire test sequence in inconsistent state. You might just want to proceed with the other testcases without blocking (or perhaps retry the same test again). In such a case a fool-proof method would be to write a poller that polls processes of Webdriver (eg. IEDriverServer.exe, Phantomjs.exe) running for more than say 10 min and kill them. An example could be found at Automatically identify (and kill) processes with long processing time

Controlling number of decimal digits in print output in R

If you are producing the entire output yourself, you can use sprintf(), e.g.

> sprintf("%.10f",0.25)
[1] "0.2500000000"

specifies that you want to format a floating point number with ten decimal points (in %.10f the f is for float and the .10 specifies ten decimal points).

I don't know of any way of forcing R's higher level functions to print an exact number of digits.

Displaying 100 digits does not make sense if you are printing R's usual numbers, since the best accuracy you can get using 64-bit doubles is around 16 decimal digits (look at .Machine$double.eps on your system). The remaining digits will just be junk.

httpd: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName

In the Apache httpd.conf file:

ServerName: 127.0.0.1

Copy file or directories recursively in Python

The python shutil.copytree method its a mess. I've done one that works correctly:

def copydirectorykut(src, dst):
    os.chdir(dst)
    list=os.listdir(src)
    nom= src+'.txt'
    fitx= open(nom, 'w')

    for item in list:
        fitx.write("%s\n" % item)
    fitx.close()

    f = open(nom,'r')
    for line in f.readlines():
        if "." in line:
            shutil.copy(src+'/'+line[:-1],dst+'/'+line[:-1])
        else:
            if not os.path.exists(dst+'/'+line[:-1]):
                os.makedirs(dst+'/'+line[:-1])
                copydirectorykut(src+'/'+line[:-1],dst+'/'+line[:-1])
            copydirectorykut(src+'/'+line[:-1],dst+'/'+line[:-1])
    f.close()
    os.remove(nom)
    os.chdir('..')

What's the most useful and complete Java cheat sheet?

It's not really a cheat-sheet, but for me I setup a 'java' search keyword in Google Chrome to search over the javadoc, using site:<javadoc_domain_here>.

You could do the same but also add the domain for the Sun Java Tutorial and for several Java FAQ sites and you'd be OK.

Otherwise, StackOverflow is a pretty good cheat-sheet :)

How to insert a string which contains an "&"

Stop using SQL/Plus, I highly recommend PL/SQL Developer it's much more than an SQL tool.

p.s. Some people prefer TOAD.

Why do we need the "finally" clause in Python?

finally is for defining "clean up actions". The finally clause is executed in any event before leaving the try statement, whether an exception (even if you do not handle it) has occurred or not.

I second @Byers's example.

What does -z mean in Bash?

-z string True if the string is null (an empty string)

How to check undefined in Typescript

Late to the story but I think some details are overlooked?

if you use

if (uemail !== undefined) {
  //some function
}

You are, technically, comparing variable uemail with variable undefined and, as the latter is not instantiated, it will give both type and value of 'undefined' purely by default, hence the comparison returns true. But it overlooks the potential that a variable by the name of undefined may actually exist -however unlikely- and would therefore then not be of type undefined. In that case, the comparison will return false.

To be correct one would have to declare a constant of type undefined for example:

const _undefined: undefined

and then test by:

if (uemail === _undefined) {
  //some function
}

This test will return true as uemail now equals both value & type of _undefined as _undefined is now properly declared to be of type undefined.

Another way would be

if (typeof(uemail) === 'undefined') {
  //some function
}

In which case the boolean return is based on comparing the two strings on either end of the comparison. This is, from a technical point of view, NOT testing for undefined, although it achieves the same result.

How to set cursor position in EditText?

I won't get setSelection() method directly , so i done like below and work like charm

EditText editText = (EditText)findViewById(R.id.edittext_id);
editText.setText("Updated New Text");
int position = editText.getText().length();
Editable editObj= editText.getText();
Selection.setSelection(editObj, position);

Rename multiple files in a directory in Python

Here is a more general solution:

This code can be used to remove any particular character or set of characters recursively from all filenames within a directory and replace them with any other character, set of characters or no character.

import os

paths = (os.path.join(root, filename)
        for root, _, filenames in os.walk('C:\FolderName')
        for filename in filenames)

for path in paths:
    # the '#' in the example below will be replaced by the '-' in the filenames in the directory
    newname = path.replace('#', '-')
    if newname != path:
        os.rename(path, newname)

Why don’t my SVG images scale using the CSS "width" property?

SVGs are different than bitmap images such as PNG etc. If an SVG has a viewBox - as yours appear to - then it will be scaled to fit it's defined viewport. It won't directly scale like a PNG would.

So increasing the width of the img won't make the icons any taller if the height is restricted. You'll just end up with the img horizontally centred in a wider box.

I believe your problem is that your SVGs have a fixed height defined in them. Open up the SVG files and make sure they either:

have no width and height defined, or
have width and height both set to "100%".

That should solve your problem. If it doesn't, post one of your SVGs into your question so we can see how it is defined.

asp.net validation to make sure textbox has integer values

<script language="javascript" type="text/javascript">
        function fixedlength(textboxID, keyEvent, maxlength) {
            //validation for digits upto 'maxlength' defined by caller function
            if (textboxID.value.length > maxlength) {
                textboxID.value = textboxID.value.substr(0, maxlength);
            }
            else if (textboxID.value.length < maxlength || textboxID.value.length == maxlength) {
                textboxID.value = textboxID.value.replace(/[^\d]+/g, '');
                return true;
            }
            else
                return false;
        }
 </script>

<asp:TextBox ID="txtNextVisit" runat="server" MaxLength="2" onblur="return fixedlength(this, event, 2);" onkeypress="return fixedlength(this, event, 2);" onkeyup="return fixedlength(this, event, 2);"></asp:TextBox>

JavaScript: How to find out if the user browser is Chrome?

If you want to detect Chrome's rendering engine (so not specific features in Google Chrome or Chromium), a simple option is:

var isChrome = !!window.chrome;

NOTE: this also returns true for many versions of Edge, Opera, etc that are based on Chrome (thanks @Carrm for pointing this out). Avoiding that is an ongoing battle (see window.opr below) so you should ask yourself if you're trying to detect the rendering engine (used by almost all major modern browsers in 2020) or some other Chrome (or Chromium?) -specific feature.

And you can probably skip !!

How to reload .bash_profile from the command line?

I like the fact that after you have just edited the file, all you need to do is type:

. !$

This sources the file you had just edited in history. See What is bang dollar in bash.

open read and close a file in 1 line of code

You don't really have to close it - Python will do it automatically either during garbage collection or at program exit. But as @delnan noted, it's better practice to explicitly close it for various reasons.

So, what you can do to keep it short, simple and explicit:

with open('pagehead.section.htm','r') as f:
    output = f.read()

Now it's just two lines and pretty readable, I think.

JQuery .hasClass for multiple values in an if statement

For anyone wondering about some of the different performance aspects with all of these different options, I've created a jsperf case here: jsperf

In short, using element.hasClass('class') is the fastest.

Next best bet is using elem.hasClass('classA') || elem.hasClass('classB'). A note on this one: order matters! If the class 'classA' is more likely to be found, list it first! OR condition statements return as soon as one of them is met.

The worst performance by far was using element.is('.class').

Also listed in the jsperf is CyberMonk's function, and Kolja's solution.

Write applications in C or C++ for Android?

How to call execl() in C with the proper arguments?

If you need just to execute your VLC playback process and only give control back to your application process when it is done and nothing more complex, then i suppose you can use just:

system("The same thing you type into console");

How to kill all processes matching a name?

use pgrep

kill -9 $(pgrep amarok)

uint8_t vs unsigned char

On almost every system I've met uint8_t == unsigned char, but this is not guaranteed by the C standard. If you are trying to write portable code and it matters exactly what size the memory is, use uint8_t. Otherwise use unsigned char.

Display tooltip on Label's hover?

You don't have to use hidden field. Use "title" property. It will show browser default tooltip. You can then use jQuery plugin (like before mentioned bootstrap tooltip) to show custom formatted tooltip.

<label for="male" title="Hello This Will Have Some Value">Hello ...</label>

Hint: you can also use css to trim text, that does not fit into the box (text-overflow property). See http://jsfiddle.net/8eeHs/

Flask - Calling python function on button OnClick event

index.html (index.html should be in templates folder)

<!doctype html>
<html>

<head>
    <title>The jQuery Example</title>

    <h2>jQuery-AJAX in FLASK. Execute function on button click</h2>  

    <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"> </script>
    <script type=text/javascript> $(function() { $("#mybutton").click(function (event) { $.getJSON('/SomeFunction', { },
    function(data) { }); return false; }); }); </script> 
</head>

<body>        
        <input type = "button" id = "mybutton" value = "Click Here" />
</body>    

</html>

test.py

from flask import Flask, jsonify, render_template, request
app = Flask(__name__)


@app.route('/')
def index():
    return render_template('index.html')

@app.route('/SomeFunction')
def SomeFunction():
    print('In SomeFunction')
    return "Nothing"



if __name__ == '__main__':
   app.run()

How to implement a queue using two stacks?

An implementation of a queue using two stacks in Swift:

struct Stack<Element> {
    var items = [Element]()

    var count : Int {
        return items.count
    }

    mutating func push(_ item: Element) {
        items.append(item)
    }

    mutating func pop() -> Element? {
        return items.removeLast()
    }

    func peek() -> Element? {
        return items.last
    }
}

struct Queue<Element> {
    var inStack = Stack<Element>()
    var outStack = Stack<Element>()

    mutating func enqueue(_ item: Element) {
        inStack.push(item)
    }

    mutating func dequeue() -> Element? {
        fillOutStack() 
        return outStack.pop()
    }

    mutating func peek() -> Element? {
        fillOutStack()
        return outStack.peek()
    }

    private mutating func fillOutStack() {
        if outStack.count == 0 {
            while inStack.count != 0 {
                outStack.push(inStack.pop()!)
            }
        }
    }
}

How to insert a row between two rows in an existing excel with HSSF (Apache POI)

Referencing Qwerty's answer, if the destRow isnot null, sheet.shiftRows() will change the destRow's reference to the next row; so we should always create a new row:

if (destRow != null) {
  sheet.shiftRows(destination, sheet.getLastRowNum(), 1);
}
destRow = sheet.createRow(destination);

Detect if page has finished loading

Is this what you had in mind?

$("document").ready( function() {
    // do your stuff
}

Resetting MySQL Root Password with XAMPP on Localhost

Reset XAMPP MySQL root password through SQL update phpmyadmin to work with it:

-Start the Apache Server and MySQL instances from the XAMPP control panel. After the server started, open any web browser and go to http://localhost/phpmyadmin/. This will open the phpMyAdmin interface. Using this interface we can manager the MySQL server from the web browser.

-In the phpMyAdmin window, select SQL tab from the right panel. This will open the SQL tab where we can run the SQL queries.

-Now type the following query in the textarea and click Go

"UPDATE mysql.user SET Password=PASSWORD('password') WHERE User='root';"
hit go
"FLUSH PRIVILEGES;"
hit go

-Now you will see a message saying that the query has been executed successfully.

-If you refresh the page, you will be getting a error message. This is because the phpMyAdmin configuration file is not aware of our newly set root passoword. To do this we have to modify the phpMyAdmin config file.

-Open the file C:\xampp\phpMyAdmin\config.inc.php in your favorite text editor. Search for the string:

$cfg\['Servers'\]\[$i\]['password'] = ''; and change it to like this, 
$cfg\['Servers'\]\[$i\]['password'] = 'password'; Here the ‘password’ is what we set to the root user using the SQL query.
$cfg['Servers'][$i]['AllowNoPassword'] = false; // set to false for password required
$cfg['Servers'][$i]['auth_type'] = 'cookie'; // web cookie auth

-Now all set to go. Save the config.inc.php file and restart the XAMPP server.

Modified from Source: http://veerasundar.com/blog/2009/01/how-to-change-the-root-password-for-mysql-in-xampp/

What's the difference between .NET Core, .NET Framework, and Xamarin?

.NET 5 will be a unified version of all .NET variants coming in November 2020, so there will be no need to choose between variants anymore.

"Javac" doesn't work correctly on Windows 10

Add java path to environment variables and move it to the top of all the paths available there. It worked for me.

Is there a W3C valid way to disable autocomplete in a HTML form?

I would be very surprised if W3C would have proposed a way that would work with (X)HTML4. The autocomplete feature is entirely browser-based, and was introduced during the last years (well after the HTML4 standard was written).

Wouldn't be surprised if HTML5 would have one, though.

Edit: As I thought, HTML5 does have that feature. To define your page as HTML5, use the following doctype (i.e: put this as the very first text in your source code). Note that not all browsers support this standard, as it's still in draft-form.

<!DOCTYPE html>

Programs & Examples On #Soft delete

How to Generate Unique Public and Private Key via RSA

Validate that text field is numeric usiung jQuery

Angular 2 declaring an array of objects

Override and reset CSS style: auto or none don't work

SQL - Query to get server's IP address

Even though JRE 8 is installed on my MAC -" No Java Runtime present,requesting to install " gets displayed in terminal

TL;DR

For JDK 11 try this:

For Java 11 follow this 2 steps, first :

And add this at end of your shell config scripts ~/.bashrc or ~/.zshrc

Problem solved!

String comparison in bash. [[: not found

What programming languages can one use to develop iPhone, iPod Touch and iPad (iOS) applications?

Data at the root level is invalid

SQLite add Primary Key

Could not find a version that satisfies the requirement tensorflow

mysql Foreign key constraint is incorrectly formed error

Postman - How to see request with headers and body data with variables substituted

How do I monitor the computer's CPU, memory, and disk usage in Java?

Things possible in IntelliJ that aren't possible in Eclipse?

SQL Server default character encoding

Vector erase iterator

Flask Error: "Method Not Allowed The method is not allowed for the requested URL"

How to run wget inside Ubuntu Docker image?

How to scale down a range of numbers with a known min and max value

What percent does x lie in a range

Scale range to another range

TLDR

ListView item background via custom selector

How to convert C# nullable int to int

Updating a JSON object using Javascript

How to tell if tensorflow is using gpu acceleration from inside python shell?

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

Array as session variable

Storing data into list with class

Sorting a Data Table

How to change ProgressBar's progress indicator color in Android

jQuery 'each' loop with JSON array

SQL: How to perform string does not equal

How to delete SQLite database from Android programmatically

How to get the MD5 hash of a file in C++?

Can enums be subclassed to add new elements?

how to get session id of socket.io client in Client

How to kill an application with all its activities?

Can I escape a double quote in a verbatim string literal?

TimePicker Dialog from clicking EditText

<meta charset="utf-8"> vs <meta http-equiv="Content-Type">

javascript get child by id

Disable / Check for Mock Location (prevent gps spoofing)

Twitter Bootstrap onclick event on buttons-radio

What are the best JVM settings for Eclipse?

How is the AND/OR operator represented as in Regular Expressions?

Test a string for a substring

Mvn install or Mvn package

How to unmount, unrender or remove a component, from itself in a React/Redux/Typescript notification message

Calculating and printing the nth prime number

How can I make the browser wait to display the page until it's fully loaded?

Correct path for img on React.js

"android.view.WindowManager$BadTokenException: Unable to add window" on buider.show()

How to redirect the output of DBMS_OUTPUT.PUT_LINE to a file?

How to add click event to a iframe with JQuery

What is the best way to compare floats for almost-equality in Python?

How to wait for a number of threads to complete?

How to change language of app when user selects language?

Edit a specific Line of a Text File in C#

COUNT / GROUP BY with active record?

How do I find the absolute position of an element using jQuery?

How do I escape a string inside JavaScript code inside an onClick handler?

How to move (and overwrite) all files from one directory to another?

What is the best way to remove a table row with jQuery?

python multithreading wait till all threads finished

Format a JavaScript string using placeholders and an object of substitutions?

How to change date format (MM/DD/YY) to (YYYY-MM-DD) in date picker

Style input element to fill remaining width of its container

How can I change the date format in Java?

Deserializing JSON data to C# using JSON.NET

What is the meaning of # in URL and how can I use that?

Background service with location listener in android

How to make a list of n numbers in Python and randomly select any number?

And add this at end of your shell config scripts
`~/.bashrc` or `~/.zshrc`

What percent does `x` lie in a range