Phone mask with jQuery and Masked Input Plugin

Yes use this

$("#phone").inputmask({"mask": "(99) 9999 - 9999"});

Link here

Avoid Adding duplicate elements to a List C#

You could use a simple Union + Distinct:

var lines = lines2.Union(lines3).Distinct();

That will add all the items from the second list into the first list, and then return all the unique strings in the combined list. Not likely to perform well with large lists, but it's simple.

Reference: http://msdn.microsoft.com/en-us/library/bb341731.aspx

SQL Server database backup restore on lower version

You can try this.

Create a Database onto SQL Server 2008.
Using Import Data feature import data from SQL Server R2 (or any higher version).
use "RedGate SQLCompare" to synchronize script.

Two statements next to curly brace in an equation

You can try the cases env in amsmath.

\documentclass{article}
\usepackage{amsmath}

\begin{document}

\begin{equation}
  f(x)=\begin{cases}
    1, & \text{if $x<0$}.\\
    0, & \text{otherwise}.
  \end{cases}
\end{equation}

\end{document}

amsmath cases

Dynamically Fill Jenkins Choice Parameter With Git Branches In a Specified Repo

I am facing a similar problem here. Our users are migrating their jobs from freestyle to pipeline. They do not want Jenkinsfile stored in their repos(historical reason) and still want to use "Git Parameter" plugin

So we have to use use "Pipeline script" and develop a different plugin which works like "Git Parameter".

This new plugin does not integrate with SCM setting in the project. The plugin is at https://plugins.jenkins.io/list-git-branches-parameter

Hope it helps you as well

Pass a datetime from javascript to c# (Controller)

I found that I needed to wrap my datetime string like this:

"startdate": "\/Date(" + date() + ")\/"

Took me an hour to figure out how to enable the WCF service to give me back the error message which told me that XD

javascript remove "disabled" attribute from html input

Best answer is just removeAttribute

element.removeAttribute("disabled");

Java for loop syntax: "for (T obj : objects)"

for each S3ObjecrSummary in objectListing.getObjectSummaries()

it's looping through each item in the collection

Git add all files modified, deleted, and untracked?

The following answer only applies to Git version 1.x, but to Git version 2.x.

You want git add -A:

git add -A stages All;

git add . stages new and modified, without deleted;

git add -u stages modified and deleted, without new.

How to use enums as flags in C++?

Note (also a bit off topic): Another way to make unique flags can be done using a bit shift. I, myself, find this easier to read.

enum Flags
{
    A = 1 << 0, // binary 0001
    B = 1 << 1, // binary 0010
    C = 1 << 2, // binary 0100
    D = 1 << 3, // binary 1000
};

It can hold values up to an int so that is, most of the time, 32 flags which is clearly reflected in the shift amount.

Get value when selected ng-option changes

I have tried some solutions,but here is basic production snippet. Please, pay attention to console output during quality assurance of this snippet.

Mark Up :

<!DOCTYPE html>
<html ng-app="appUp">
<head>
<title>
  Angular Select snippet
</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" />

</head>


<body ng-controller="upController">

<div  class="container">

 <div class="row">
 <div class="col-md-4">

 </div> 
 <div class="col-md-3">
    <div class="form-group">
    <select name="slct" id="slct" class="form-control" ng-model="selBrand" ng-change="Changer(selBrand)" ng-options="brand as brand.name for brand in stock">
    <option value="">
        Select Brand
    </option>
    </select>
    </div>

    <div class="form-group">
    <input type="hidden" name="delimiter" value=":" ng-model="delimiter" />
    <input type="hidden" name="currency" value="$" ng-model="currency" />
    <span>
     {{selBrand.name}}{{delimiter}}{{selBrand.price}}{{currency}}
    </span>
    </div>

 </div> 
 <div class="col-md-4">

 </div>
 </div>
</div>

<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js">
</script>
<script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js"></script>
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js"></script>
<script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/angularjs/1.5.7/angular.min.js">
</script>
<script src="js/ui-bootstrap-tpls-2.5.0.min.js"></script>
<script src="js/main.js"></script>
</body>

</html>

Code:

var c = console;

var d = document;


 var app = angular.module('appUp',[]).controller('upController',function($scope){

    $scope.stock = [{
     name:"Adidas",
     price:420      
    },
    {
     name:"Nike",
     price:327      
    },
    {
     name:"Clark",
     price:725      
    }
    ];//data 



    $scope.Changer = function(){
     if($scope.selBrand){ 
     c.log("brand:"+$scope.selBrand.name+",price:"+$scope.selBrand.price);
     $scope.currency = "$";
     $scope.delimiter = ":";
     }
     else{

        $scope.currency = "";
        $scope.delimiter = "";
        c.clear();
     }
    }; // onchange handler

 });

Explanation: important point here is null check of the changed value, i.e. if value is 'undefined' or 'null' we should to handle this situation.

How to install Intellij IDEA on Ubuntu?

try simple way to install intellij idea

Install IntelliJ on Ubuntu using Ubuntu Make

You need to install Ubuntu Make first. If you are using Ubuntu 16.04, 18.04 or a higher version, you can install Ubuntu Make using the command below:

sudo apt install ubuntu-make

Once you have Ubuntu Make installed, you can use the command below to install IntelliJ IDEA Community edition:

umake ide idea

To install the IntelliJ IDEA Ultimate edition, use the command below:

umake ide idea-ultimate

To remove IntelliJ IDEA installed via Ubuntu Make, use the command below for your respective versions:

umake -r ide idea
umake -r ide idea-ultimate

you may visit for more option.

https://itsfoss.com/install-intellij-ubuntu-linux/

Display Records From MySQL Database using JTable in Java

If you need to work a lot with database in your code and you know the structure of your table, I suggest you do it as follow:

First of all you can define a class which will help you to make objects capable of keeping your table rows data. For example in my project I created a class named Document.java to keep data of a single document from my database and I made an array list of these objects to keep data of my table which is gain by a query.

package financialdocuments;

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

/**
 *
 * @author Administrator
 */
public class Document {

 private int document_number; 
 private boolean document_type;
 private boolean document_status; 
 private StringBuilder document_date;
 private StringBuilder document_statement;
 private int document_code_number;
 private int document_employee_number;
 private int document_client_number;
 private String document_employee_name;
 private String document_client_name;
 private long document_amount;
 private long document_payment_amount;

 HashMap<Integer,Activity> document_activity_hashmap;


public Document(int dn,boolean dt,boolean ds,String dd,String dst,int dcon,int den,int dcln,long da,String dena,String dcna){

    document_date = new StringBuilder(dd);
    document_date.setLength(10);
    document_date.setCharAt(4, '.');
    document_date.setCharAt(7, '.');
    document_statement = new StringBuilder(dst);
    document_statement.setLength(50);
    document_number = dn; 
    document_type = dt;
    document_status = ds;
    document_code_number = dcon;
    document_employee_number = den;
    document_client_number = dcln;
    document_amount = da;
    document_employee_name = dena;
    document_client_name = dcna;

    document_payment_amount = 0;

    document_activity_hashmap = new HashMap<>();

}

public Document(int dn,boolean dt,boolean ds, long dpa){

    document_number = dn; 
    document_type = dt;
    document_status = ds;

    document_payment_amount = dpa;

    document_activity_hashmap = new HashMap<>();

}

// Print document information 
public void printDocumentInformation (){
    System.out.println("Document Number:" + document_number); 
    System.out.println("Document Date:" + document_date); 
    System.out.println("Document Type:" + document_type); 
    System.out.println("Document Status:" + document_status); 
    System.out.println("Document Statement:" + document_statement); 
    System.out.println("Document Code Number:" + document_code_number); 
    System.out.println("Document Client Number:" + document_client_number); 
    System.out.println("Document Employee Number:" + document_employee_number); 
    System.out.println("Document Amount:" + document_amount); 
    System.out.println("Document Payment Amount:" + document_payment_amount); 
    System.out.println("Document Employee Name:" + document_employee_name); 
    System.out.println("Document Client Name:" + document_client_name); 

} 
}

Second of all, you can define a class to handle your database needs. For example I defined a class named DataBase.java which handles my connections to the database and my needed queries. And I instantiated an objected of it in my main class.

package financialdocuments;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author Administrator
 */
public class DataBase {

/** 
 * 
 * Defining parameters and strings that are going to be used
 * 
 */
//Connection connect;

// Tables which their datas are extracted at the beginning 
HashMap<Integer,String> code_table;
HashMap<Integer,String> activity_table;
HashMap<Integer,String> client_table;
HashMap<Integer,String> employee_table;

// Resultset Returned by queries 
private ResultSet result;

// Strings needed to set connection
String url = "jdbc:mysql://localhost:3306/financial_documents?useUnicode=yes&characterEncoding=UTF-8";
String dbName = "financial_documents";
String driver = "com.mysql.jdbc.Driver";
String userName = "root"; 
String password = "";

public DataBase(){

    code_table = new HashMap<>();
    activity_table = new HashMap<>();
    client_table = new HashMap<>();
    employee_table = new HashMap<>();
    Initialize();

}

/**
 * Set variables and objects for this class.
 */
private void Initialize(){

    System.out.println("Loading driver..."); 
    try {
        Class.forName(driver);
        System.out.println("Driver loaded!"); 
    } catch (ClassNotFoundException e) { 
        throw new IllegalStateException("Cannot find the driver in the classpath!", e); 
    }

    System.out.println("Connecting database...");

try (Connection connect = DriverManager.getConnection(url,userName,password)) {
            System.out.println("Database connected!");
            //Get tables' information 
            selectCodeTableQueryArray(connect);
           // System.out.println("HshMap Print:");
           // printCodeTableQueryArray();

            selectActivityTableQueryArray(connect);
           // System.out.println("HshMap Print:");
           // printActivityTableQueryArray(); 

            selectClientTableQueryArray(connect);
           // System.out.println("HshMap Print:");
           // printClientTableQueryArray();

            selectEmployeeTableQueryArray(connect);
           // System.out.println("HshMap Print:");
           // printEmployeeTableQueryArray();

            connect.close();
    }catch (SQLException e) { 
        throw new IllegalStateException("Cannot connect the database!", e);
    }

} 

/**
 * Write Queries 
 * @param s
 * @return 
 */
public boolean insertQuery(String s){

    boolean ret = false;
    System.out.println("Loading driver..."); 
    try {
        Class.forName(driver);
        System.out.println("Driver loaded!"); 
    } catch (ClassNotFoundException e) { 
        throw new IllegalStateException("Cannot find the driver in the classpath!", e); 
    }

    System.out.println("Connecting database...");

try (Connection connect = DriverManager.getConnection(url,userName,password)) {
            System.out.println("Database connected!");
            //Set tables' information 
            try {
                Statement st = connect.createStatement();
                int val = st.executeUpdate(s);
                if(val==1){ 
                    System.out.print("Successfully inserted value");
                    ret = true;
                }
                else{ 
                    System.out.print("Unsuccessful insertion");
                    ret = false;
                }
                st.close();
            } catch (SQLException ex) {
                Logger.getLogger(DataBase.class.getName()).log(Level.SEVERE, null, ex);
            }
            connect.close();
    }catch (SQLException e) { 
        throw new IllegalStateException("Cannot connect the database!", e);
    } 
    return ret;
}

/**
 * Query needed to get code table's data
 * @param c
 * @return 
 */
private void selectCodeTableQueryArray(Connection c) {
    try {
        Statement st = c.createStatement();
        ResultSet res = st.executeQuery("SELECT * FROM  code;");
        while (res.next()) {
                int id = res.getInt("code_number");
                String msg = res.getString("code_statement");
                code_table.put(id, msg);
            }
        st.close();
    } catch (SQLException ex) {
        Logger.getLogger(DataBase.class.getName()).log(Level.SEVERE, null, ex);
    }
}

private void printCodeTableQueryArray() {
    for (HashMap.Entry<Integer ,String> entry : code_table.entrySet()){
        System.out.println("Key : " + entry.getKey() + " Value : " + entry.getValue());
    }
}

/**
 * Query needed to get activity table's data
 * @param c
 * @return 
 */
private void selectActivityTableQueryArray(Connection c) {
    try {
        Statement st = c.createStatement();
        ResultSet res = st.executeQuery("SELECT * FROM  activity;");
        while (res.next()) {
                int id = res.getInt("activity_number");
                String msg = res.getString("activity_statement");
                activity_table.put(id, msg);
            }
        st.close();
    } catch (SQLException ex) {
        Logger.getLogger(DataBase.class.getName()).log(Level.SEVERE, null, ex);
    }
}

private void printActivityTableQueryArray() {
    for (HashMap.Entry<Integer ,String> entry : activity_table.entrySet()){
        System.out.println("Key : " + entry.getKey() + " Value : " + entry.getValue());
    }
}

/**
 * Query needed to get client table's data
 * @param c
 * @return 
 */
private void selectClientTableQueryArray(Connection c) {
    try {
        Statement st = c.createStatement();
        ResultSet res = st.executeQuery("SELECT * FROM  client;");
        while (res.next()) {
                int id = res.getInt("client_number");
                String msg = res.getString("client_full_name");
                client_table.put(id, msg);
            }
        st.close();
    } catch (SQLException ex) {
        Logger.getLogger(DataBase.class.getName()).log(Level.SEVERE, null, ex);
    }
}

private void printClientTableQueryArray() {
    for (HashMap.Entry<Integer ,String> entry : client_table.entrySet()){
        System.out.println("Key : " + entry.getKey() + " Value : " + entry.getValue());
    }
}

/**
 * Query needed to get activity table's data
 * @param c
 * @return 
 */
private void selectEmployeeTableQueryArray(Connection c) {
    try {
        Statement st = c.createStatement();
        ResultSet res = st.executeQuery("SELECT * FROM  employee;");
        while (res.next()) {
                int id = res.getInt("employee_number");
                String msg = res.getString("employee_full_name");
                employee_table.put(id, msg);
            }
        st.close();
    } catch (SQLException ex) {
        Logger.getLogger(DataBase.class.getName()).log(Level.SEVERE, null, ex);
    }
}

private void printEmployeeTableQueryArray() {
    for (HashMap.Entry<Integer ,String> entry : employee_table.entrySet()){
        System.out.println("Key : " + entry.getKey() + " Value : " + entry.getValue());
    }
} 
}

I hope this could be a little help.

Best way to do nested case statement logic in SQL Server

I went through this and found all the answers super cool, however wants to add to answer given by @deejers

    SELECT
    col1,
    col2,
    col3,
    CASE
        WHEN condition1 THEN calculation1 
        WHEN condition2 THEN calculation2
        WHEN condition3 THEN calculation3
        WHEN condition4 THEN calculation4
        WHEN condition5 THEN calculation5         
    END AS 'calculatedcol1',
    col4,
    col5 -- etc
FROM table

you can make ELSE optional as its not mandatory, it is very helpful in many scenarios.

How to get the selected row values of DevExpress XtraGrid?

var rowHandle = gridView.FocusedRowHandle;

var obj = gridView.GetRowCellValue(rowHandle, "FieldName");

//For example  
int val= Convert.ToInt32(gridView.GetRowCellValue(rowHandle, "FieldName"));

Clicking the back button twice to exit an activity

 public void onBackPressed() {
    if (doubleBackToExitPressedOnce) {
        super.onBackPressed();
        return;
    }

    this.doubleBackToExitPressedOnce = true;
    Toast.makeText(this, "Please click BACK again to exit", Toast.LENGTH_SHORT).show();

    new Handler().postDelayed(new Runnable() {

        @Override
        public void run() {
            doubleBackToExitPressedOnce=false;
        }
    }, 2000);

Declare Variableprivate boolean doubleBackToExitPressedOnce = false;

Paste this in your Main Activity and this will solve your issue

How do I calculate percentiles with python/numpy?

Starting Python 3.8, the standard library comes with the quantiles function as part of the statistics module:

from statistics import quantiles

quantiles([1, 2, 3, 4, 5], n=100)
# [0.06, 0.12, 0.18, 0.24, 0.3, 0.36, 0.42, 0.48, 0.54, 0.6, 0.66, 0.72, 0.78, 0.84, 0.9, 0.96, 1.02, 1.08, 1.14, 1.2, 1.26, 1.32, 1.38, 1.44, 1.5, 1.56, 1.62, 1.68, 1.74, 1.8, 1.86, 1.92, 1.98, 2.04, 2.1, 2.16, 2.22, 2.28, 2.34, 2.4, 2.46, 2.52, 2.58, 2.64, 2.7, 2.76, 2.82, 2.88, 2.94, 3.0, 3.06, 3.12, 3.18, 3.24, 3.3, 3.36, 3.42, 3.48, 3.54, 3.6, 3.66, 3.72, 3.78, 3.84, 3.9, 3.96, 4.02, 4.08, 4.14, 4.2, 4.26, 4.32, 4.38, 4.44, 4.5, 4.56, 4.62, 4.68, 4.74, 4.8, 4.86, 4.92, 4.98, 5.04, 5.1, 5.16, 5.22, 5.28, 5.34, 5.4, 5.46, 5.52, 5.58, 5.64, 5.7, 5.76, 5.82, 5.88, 5.94]
quantiles([1, 2, 3, 4, 5], n=100)[49] # 50th percentile (e.g median)
# 3.0

quantiles returns for a given distribution dist a list of n - 1 cut points separating the n quantile intervals (division of dist into n continuous intervals with equal probability):

statistics.quantiles(dist, *, n=4, method='exclusive')

where n, in our case (percentiles) is 100.

How can I disable a button on a jQuery UI dialog?

Looks like anyone, even in this linked question, have proposed this solution, similar to the first part of the answer given by Nick Craver:

$("#dialog").dialog({
    width: 480,
    height: "auto",
    buttons: [
        {
            id: "button-cancel",
            text: "Cancel",
            click: function() {
                $(this).dialog("close");
            }
        },
        {
            id: "button-ok",
            text: "Ok",
            click: function() {
                $(this).dialog("close");
            }
        }
    ]
});

Then, elsewhere, you should be able to use the API for the jquery UI button:

$("#button-ok").button("disable");

'readline/readline.h' file not found

This command helped me on linux mint when i had exact same problem

gcc filename.c -L/usr/include -lreadline -o filename

You could use alias if you compile it many times Forexample:

alias compilefilename='gcc filename.c -L/usr/include -lreadline -o filename'

No 'Access-Control-Allow-Origin' - Node / Apache Port Issue

The top answer worked fine for me, except that I needed to whitelist more than one domain.

Also, top answer suffers from the fact that OPTIONS request isn't handled by middleware and you don't get it automatically.

I store whitelisted domains as allowed_origins in Express configuration and put the correct domain according to origin header since Access-Control-Allow-Origin doesn't allow specifying more than one domain.

Here's what I ended up with:

var _ = require('underscore');

function allowCrossDomain(req, res, next) {
  res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS');

  var origin = req.headers.origin;
  if (_.contains(app.get('allowed_origins'), origin)) {
    res.setHeader('Access-Control-Allow-Origin', origin);
  }

  if (req.method === 'OPTIONS') {
    res.send(200);
  } else {
    next();
  }
}

app.configure(function () {
  app.use(express.logger());
  app.use(express.bodyParser());
  app.use(allowCrossDomain);
});

iOS9 Untrusted Enterprise Developer with no option to trust

Do it like this:

Enter image description here

Go to Settings -> General -> Profiles - tap on your Profile - tap on the Trust button.

but iOS10 has a little change,

Users should go to Settings - General - Device Management - tap on your Profile - tap on Trust button.

enter image description here

Reference: iOS10AdaptationTips

SQL to generate a list of numbers from 1 to 100

I created an Oracle function that returns a table of numbers

CREATE OR REPLACE FUNCTION [schema].FN_TABLE_NUMBERS(
    NUMINI INTEGER,
    NUMFIN INTEGER,
    EXPONENCIAL INTEGER DEFAULT 0
) RETURN TBL_NUMBERS
IS
    NUMEROS TBL_NUMBERS;
    INDICE NUMBER;
BEGIN
    NUMEROS := TBL_NUMBERS();

    FOR I IN (
        WITH TABLA AS (SELECT NUMINI, NUMFIN FROM DUAL)
        SELECT NUMINI NUM FROM TABLA UNION ALL
        SELECT 
            (SELECT NUMINI FROM TABLA) + (LEVEL*TO_NUMBER('1E'||TO_CHAR(EXPONENCIAL))) NUM
        FROM DUAL
        CONNECT BY 
            (LEVEL*TO_NUMBER('1E'||TO_CHAR(EXPONENCIAL))) <= (SELECT NUMFIN-NUMINI FROM TABLA)
    ) LOOP
        NUMEROS.EXTEND;
        INDICE := NUMEROS.COUNT; 
        NUMEROS(INDICE):= i.NUM;
    END LOOP;

    RETURN NUMEROS;

EXCEPTION
  WHEN NO_DATA_FOUND THEN
       RETURN NUMEROS;
  WHEN OTHERS THEN
       RETURN NUMEROS;
END;
/

Is necessary create a new data type:

CREATE OR REPLACE TYPE [schema]."TBL_NUMBERS" IS TABLE OF NUMBER;
/

Usage:

SELECT COLUMN_VALUE NUM FROM TABLE([schema].FN_TABLE_NUMBERS(1,10))--integers difference: 1;2;.......;10

And if you need decimals between numbers by exponencial notation:

SELECT COLUMN_VALUE NUM FROM TABLE([schema].FN_TABLE_NUMBERS(1,10,-1));--with 0.1 difference: 1;1.1;1.2;.......;10
SELECT COLUMN_VALUE NUM FROM TABLE([schema].FN_TABLE_NUMBERS(1,10,-2));--with 0.01 difference: 1;1.01;1.02;.......;10

What is console.log?

console.log specifically is a method for developers to write code to inconspicuously inform the developers what the code is doing. It can be used to alert you that there's an issue, but shouldn't take the place of an interactive debugger when it comes time to debug the code. Its asynchronous nature means that the logged values don't necessarily represent the value when the method was called.

In short: log errors with console.log (if available), then fix the errors using your debugger of choice: Firebug, WebKit Developer Tools (built-in to Safari and Chrome), IE Developer Tools or Visual Studio.

CSV with comma or semicolon?

CSV is a standard format, outlined in RFC 4180 (in 2005), so there IS no lack of a standard. https://www.ietf.org/rfc/rfc4180.txt

And even before that, the C in CSV has always stood for Comma, not for semiColon :(

It's a pity Microsoft keeps ignoring that and is still sticking to the monstrosity they turned it into decades ago (yes, I admit, that was before the RFC was created).

One record per line, unless a newline occurs within quoted text (see below).
COMMA as column separator. Never a semicolon.
PERIOD as decimal point in numbers. Never a comma.
Text containing commas, periods and/or newlines enclosed in "double quotation marks".
Only if text is enclosed in double quotation marks, such quotations marks in the text escaped by doubling. These examples represent the same three fields:

1,"this text contains ""quotation marks""",3

1,this text contains "quotation marks",3

The standard does not cover date and time values, personally I try to stick to ISO 8601 format to avoid day/month/year -- month/day/year confusion.

How to assert greater than using JUnit Assert?

You can put it like this

  assertTrue("your fail message ",Long.parseLong(previousTokenValues[1]) > Long.parseLong(currentTokenValues[1]));

How to find unused/dead code in java projects

There is a Java project - Dead Code Detector (DCD). For source code it doesn't seem to work well, but for .jar file - it's really good. Plus you can filter by class and by method.

ValueError: max() arg is an empty sequence

Since you are always initialising self.listMyData to an empty list in clkFindMost your code will always lead to this error* because after that both unique_names and frequencies are empty iterables, so fix this.

Another thing is that since you're iterating over a set in that method then calculating frequency makes no sense as set contain only unique items, so frequency of each item is always going to be 1.

Lastly dict.get is a method not a list or dictionary so you can't use [] with it:

Correct way is:

if frequencies.get(name):

And Pythonic way is:

if name in frequencies:

The Pythonic way to get the frequency of items is to use collections.Counter:

from collections import Counter   #Add this at the top of file.

def clkFindMost(self, parent):

        #self.listMyData = []   
        if self.listMyData:
           frequencies = Counter(self.listMyData)
           self.txtResults.Value = max(frequencies, key=frequencies.get)
        else:
           self.txtResults.Value = ''

max() and min() throw such error when an empty iterable is passed to them. You can check the length of v before calling max() on it.

>>> lst = []
>>> max(lst)

Traceback (most recent call last):
  File "<pyshell#2>", line 1, in <module>
    max(lst)
ValueError: max() arg is an empty sequence
>>> if lst:
    mx = max(lst)
else:
    #Handle this here

If you are using it with an iterator then you need to consume the iterator first before calling max() on it because boolean value of iterator is always True, so we can't use if on them directly:

>>> it = iter([])
>>> bool(it)
True
>>> lst = list(it)
>>> if lst:
       mx = max(lst)
    else:
      #Handle this here

Good news is starting from Python 3.4 you will be able to specify an optional return value for min() and max() in case of empty iterable.

How can I get the latest JRE / JDK as a zip file rather than EXE or MSI installer?

I did copy the JRE folder several times and it always works fine. But I am really not sure if you can just get a zip file with its contents, as the official installation install the plugins for IE, Firefox and whatsoever.

Remove stubborn underline from link

  a {
    color: unset;
    text-decoration: unset;
  }

Passing a URL with brackets to curl

Never mind, I found it in the docs:

-g/--globoff
              This  option  switches  off  the "URL globbing parser". When you set this option, you can
              specify URLs that contain the letters {}[] without having them being interpreted by  curl
              itself.  Note  that  these  letters  are not normal legal URL contents but they should be
              encoded according to the URI standard.

iPhone UITextField - Change placeholder text color

Also in your storyboard, without single line of code

What to do with commit made in a detached head

Create a branch where you are, then switch to master and merge it:

git branch my-temporary-work
git checkout master
git merge my-temporary-work

Python error "ImportError: No module named"

To all those who still have this issue. I believe Pycharm gets confused with imports. For me, when i write 'from namespace import something', the previous line gets underlined in red, signaling that there is an error, but works. However ''from .namespace import something' doesn't get underlined, but also doesn't work.

Try

try:
    from namespace import something 
except NameError:
    from .namespace import something

how to get the child node in div using javascript

If you give your table a unique id, its easier:

<div id="ctl00_ContentPlaceHolder1_Jobs_dlItems_ctl01_a"
    onmouseup="checkMultipleSelection(this,event);">
       <table id="ctl00_ContentPlaceHolder1_Jobs_dlItems_ctl01_a_table" 
              cellpadding="0" cellspacing="0" border="0" width="100%">
           <tr>
              <td style="width:50px; text-align:left;">09:15 AM</td>
              <td style="width:50px; text-align:left;">Item001</td>
              <td style="width:50px; text-align:left;">10</td>
              <td style="width:50px; text-align:left;">Address1</td>
              <td style="width:50px; text-align:left;">46545465</td>
              <td style="width:50px; text-align:left;">ref1</td>
           </tr>
       </table>
</div>


var multiselect = 
    document.getElementById(
               'ctl00_ContentPlaceHolder1_Jobs_dlItems_ctl01_a_table'
            ).rows[0].cells,
    timeXaddr = [multiselect[0].innerHTML, multiselect[2].innerHTML];

//=> timeXaddr now an array containing ['09:15 AM', 'Address1'];

What is the relative performance difference of if/else versus switch statement in Java?

In my test the better performance is ENUM > MAP > SWITCH > IF/ELSE IF in Windows7.

import java.util.HashMap;
import java.util.Map;

public class StringsInSwitch {
public static void main(String[] args) {
    String doSomething = null;


    //METHOD_1 : SWITCH
    long start = System.currentTimeMillis();
    for (int i = 0; i < 99999999; i++) {
        String input = "Hello World" + (i & 0xF);

        switch (input) {
        case "Hello World0":
            doSomething = "Hello World0";
            break;
        case "Hello World1":
            doSomething = "Hello World0";
            break;
        case "Hello World2":
            doSomething = "Hello World0";
            break;
        case "Hello World3":
            doSomething = "Hello World0";
            break;
        case "Hello World4":
            doSomething = "Hello World0";
            break;
        case "Hello World5":
            doSomething = "Hello World0";
            break;
        case "Hello World6":
            doSomething = "Hello World0";
            break;
        case "Hello World7":
            doSomething = "Hello World0";
            break;
        case "Hello World8":
            doSomething = "Hello World0";
            break;
        case "Hello World9":
            doSomething = "Hello World0";
            break;
        case "Hello World10":
            doSomething = "Hello World0";
            break;
        case "Hello World11":
            doSomething = "Hello World0";
            break;
        case "Hello World12":
            doSomething = "Hello World0";
            break;
        case "Hello World13":
            doSomething = "Hello World0";
            break;
        case "Hello World14":
            doSomething = "Hello World0";
            break;
        case "Hello World15":
            doSomething = "Hello World0";
            break;
        }
    }

    System.out.println("Time taken for String in Switch :"+ (System.currentTimeMillis() - start));




    //METHOD_2 : IF/ELSE IF
    start = System.currentTimeMillis();

    for (int i = 0; i < 99999999; i++) {
        String input = "Hello World" + (i & 0xF);

        if(input.equals("Hello World0")){
            doSomething = "Hello World0";
        } else if(input.equals("Hello World1")){
            doSomething = "Hello World0";

        } else if(input.equals("Hello World2")){
            doSomething = "Hello World0";

        } else if(input.equals("Hello World3")){
            doSomething = "Hello World0";

        } else if(input.equals("Hello World4")){
            doSomething = "Hello World0";

        } else if(input.equals("Hello World5")){
            doSomething = "Hello World0";

        } else if(input.equals("Hello World6")){
            doSomething = "Hello World0";

        } else if(input.equals("Hello World7")){
            doSomething = "Hello World0";

        } else if(input.equals("Hello World8")){
            doSomething = "Hello World0";

        } else if(input.equals("Hello World9")){
            doSomething = "Hello World0";

        } else if(input.equals("Hello World10")){
            doSomething = "Hello World0";

        } else if(input.equals("Hello World11")){
            doSomething = "Hello World0";

        } else if(input.equals("Hello World12")){
            doSomething = "Hello World0";

        } else if(input.equals("Hello World13")){
            doSomething = "Hello World0";

        } else if(input.equals("Hello World14")){
            doSomething = "Hello World0";

        } else if(input.equals("Hello World15")){
            doSomething = "Hello World0";

        }
    }
    System.out.println("Time taken for String in if/else if :"+ (System.currentTimeMillis() - start));









    //METHOD_3 : MAP
    //Create and build Map
    Map<String, ExecutableClass> map = new HashMap<String, ExecutableClass>();
    for (int i = 0; i <= 15; i++) {
        String input = "Hello World" + (i & 0xF);
        map.put(input, new ExecutableClass(){
                            public void execute(String doSomething){
                                doSomething = "Hello World0";
                            }
                        });
    }


    //Start test map
    start = System.currentTimeMillis();
    for (int i = 0; i < 99999999; i++) {
        String input = "Hello World" + (i & 0xF);
        map.get(input).execute(doSomething);
    }
    System.out.println("Time taken for String in Map :"+ (System.currentTimeMillis() - start));






    //METHOD_4 : ENUM (This doesn't use muliple string with space.)
    start = System.currentTimeMillis();
    for (int i = 0; i < 99999999; i++) {
        String input = "HW" + (i & 0xF);
        HelloWorld.valueOf(input).execute(doSomething);
    }
    System.out.println("Time taken for String in ENUM :"+ (System.currentTimeMillis() - start));


    }

}

interface ExecutableClass
{
    public void execute(String doSomething);
}



// Enum version
enum HelloWorld {
    HW0("Hello World0"), HW1("Hello World1"), HW2("Hello World2"), HW3(
            "Hello World3"), HW4("Hello World4"), HW5("Hello World5"), HW6(
            "Hello World6"), HW7("Hello World7"), HW8("Hello World8"), HW9(
            "Hello World9"), HW10("Hello World10"), HW11("Hello World11"), HW12(
            "Hello World12"), HW13("Hello World13"), HW14("Hello World4"), HW15(
            "Hello World15");

    private String name = null;

    private HelloWorld(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public void execute(String doSomething){
        doSomething = "Hello World0";
    }

    public static HelloWorld fromString(String input) {
        for (HelloWorld hw : HelloWorld.values()) {
            if (input.equals(hw.getName())) {
                return hw;
            }
        }
        return null;
    }

}





//Enum version for betterment on coding format compare to interface ExecutableClass
enum HelloWorld1 {
    HW0("Hello World0") {   
        public void execute(String doSomething){
            doSomething = "Hello World0";
        }
    }, 
    HW1("Hello World1"){    
        public void execute(String doSomething){
            doSomething = "Hello World0";
        }
    };
    private String name = null;

    private HelloWorld1(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public void execute(String doSomething){
    //  super call, nothing here
    }
}


/*
 * http://stackoverflow.com/questions/338206/why-cant-i-switch-on-a-string
 * https://docs.oracle.com/javase/specs/jvms/se7/html/jvms-3.html#jvms-3.10
 * http://forums.xkcd.com/viewtopic.php?f=11&t=33524
 */

How to write a Python module/package?

A module is a file containing Python definitions and statements. The file name is the module name with the suffix .py

Create a file called hello.py with the following function as its content:

def helloworld():
   print "hello"

Then you can

import hello
hello.helloworld()

To group many .py files, put them in a folder. Any folder with an init.py is considered a module by python and you can call them a package.

|-HelloModule |_ init.py |_ hellomodule.py

How to manually update datatables table with new JSON data

Here is solution for legacy datatable 1.9.4

    var myData = [
      {
        "id": 1,
        "first_name": "Andy",
        "last_name": "Anderson"
      }
   ];
    var myData2 = [
      {
        "id": 2,
        "first_name": "Bob",
        "last_name": "Benson"
      }
    ];

  $('#table').dataTable({
  //  data: myData,
       aoColumns: [
         { mData: 'id' },
         { mData: 'first_name' },
         { mData: 'last_name' }
      ]
  });

 $('#table').dataTable().fnClearTable();
 $('#table').dataTable().fnAddData(myData2);

Datatables warning(table id = 'example'): cannot reinitialise data table

Add "bDestroy": true in your dataTable Like:-

   $('#example').dataTable({
    ....
    stateSave: true,
    "bDestroy": true
    });

It Will Work.

In Angular, What is 'pathmatch: full' and what effect does it have?

The path-matching strategy, one of 'prefix' or 'full'. Default is 'prefix'.

By default, the router checks URL elements from the left to see if the URL matches a given path, and stops when there is a match. For example, '/team/11/user' matches 'team/:id'.

The path-match strategy 'full' matches against the entire URL. It is important to do this when redirecting empty-path routes. Otherwise, because an empty path is a prefix of any URL, the router would apply the redirect even when navigating to the redirect destination, creating an endless loop.

Source : https://angular.io/api/router/Route#properties

Can the Android drawable directory contain subdirectories?

No, the resources mechanism doesn't support subfolders in the drawable directory, so yes - you need to keep that hierarchy flat.

The directory layout you showed would result in none of the images being available.

From my own experiments it seems that having a subfolder with any items in it, within the res/drawable folder, will cause the resource compiler to fail -- preventing the R.java file from being generated correctly.

Is it good practice to make the constructor throw an exception?

As mentioned in another answer here, in Guideline 7-3 of the Java Secure Coding Guidelines, throwing an exception in the constructor of a non-final class opens a potential attack vector:

Guideline 7-3 / OBJECT-3: Defend against partially initialized instances of non-final classes When a constructor in a non-final class throws an exception, attackers can attempt to gain access to partially initialized instances of that class. Ensure that a non-final class remains totally unusable until its constructor completes successfully.

From JDK 6 on, construction of a subclassable class can be prevented by throwing an exception before the Object constructor completes. To do this, perform the checks in an expression that is evaluated in a call to this() or super().
    // non-final java.lang.ClassLoader
    public abstract class ClassLoader {
        protected ClassLoader() {
            this(securityManagerCheck());
        }
        private ClassLoader(Void ignored) {
            // ... continue initialization ...
        }
        private static Void securityManagerCheck() {
            SecurityManager security = System.getSecurityManager();
            if (security != null) {
                security.checkCreateClassLoader();
            }
            return null;
        }
    }
For compatibility with older releases, a potential solution involves the use of an initialized flag. Set the flag as the last operation in a constructor before returning successfully. All methods providing a gateway to sensitive operations must first consult the flag before proceeding:
    public abstract class ClassLoader {

        private volatile boolean initialized;

        protected ClassLoader() {
            // permission needed to create ClassLoader
            securityManagerCheck();
            init();

            // Last action of constructor.
            this.initialized = true;
        }
        protected final Class defineClass(...) {
            checkInitialized();

            // regular logic follows
            ...
        }

        private void checkInitialized() {
            if (!initialized) {
                throw new SecurityException(
                    "NonFinal not initialized"
                );
            }
        }
    }
Furthermore, any security-sensitive uses of such classes should check the state of the initialization flag. In the case of ClassLoader construction, it should check that its parent class loader is initialized.

Partially initialized instances of a non-final class can be accessed via a finalizer attack. The attacker overrides the protected finalize method in a subclass and attempts to create a new instance of that subclass. This attempt fails (in the above example, the SecurityManager check in ClassLoader's constructor throws a security exception), but the attacker simply ignores any exception and waits for the virtual machine to perform finalization on the partially initialized object. When that occurs the malicious finalize method implementation is invoked, giving the attacker access to this, a reference to the object being finalized. Although the object is only partially initialized, the attacker can still invoke methods on it, thereby circumventing the SecurityManager check. While the initialized flag does not prevent access to the partially initialized object, it does prevent methods on that object from doing anything useful for the attacker.

Use of an initialized flag, while secure, can be cumbersome. Simply ensuring that all fields in a public non-final class contain a safe value (such as null) until object initialization completes successfully can represent a reasonable alternative in classes that are not security-sensitive.

A more robust, but also more verbose, approach is to use a "pointer to implementation" (or "pimpl"). The core of the class is moved into a non-public class with the interface class forwarding method calls. Any attempts to use the class before it is fully initialized will result in a NullPointerException. This approach is also good for dealing with clone and deserialization attacks.
    public abstract class ClassLoader {

        private final ClassLoaderImpl impl;

        protected ClassLoader() {
            this.impl = new ClassLoaderImpl();
        }
        protected final Class defineClass(...) {
            return impl.defineClass(...);
        }
    }

    /* pp */ class ClassLoaderImpl {
        /* pp */ ClassLoaderImpl() {
            // permission needed to create ClassLoader
            securityManagerCheck();
            init();
        }

        /* pp */ Class defineClass(...) {
            // regular logic follows
            ...
        }
    }

Page Redirect after X seconds wait using JavaScript

setTimeout('Redirect()', 1000);
function Redirect() 
{  
    window.location="https://stackoverflow.com"; 
}

//document.write("You will be Redirect to a new page in 1000 -> 1 Seconds, 2000 -> 2 Seconds");

Display an image with Python

If you use matplotlib, you need to show the image using plt.show() unless you are not in interactive mode. E.g.:

plt.figure()
plt.imshow(sample_image) 
plt.show()  # display it

pandas how to check dtype for all columns in a dataframe?

To go one step further, I assume you want to do something with these dtypes. df.dtypes.to_dict() comes in handy.

my_type = 'float64' #<---

dtypes = dataframe.dtypes.to_dict()

for col_nam, typ in dtypes.items():
    if (typ != my_type): #<---
        raise ValueError(f"Yikes - `dataframe['{col_name}'].dtype == {typ}` not {my_type}")

You'll find that Pandas did a really good job comparing NumPy classes and user-provided strings. For example: even things like 'double' == dataframe['col_name'].dtype will succeed when .dtype==np.float64.

java create date object using a value string

It is because value coming String (Java Date object constructor for getting string is deprecated)

and Date(String) is deprecated.

Have a look at jodatime or you could put @SuppressWarnings({“deprecation”}) outside the method calling the Date(String) constructor.

How to insert Records in Database using C# language?

Use a parameterized query to prevent Sql injections (secutity problem)

Use the using statement so the connection will be closed and resources will be disposed.

using(var connection = new SqlConnection("connectionString"))
{
    connection.Open();
    var sql = "INSERT INTO Main(FirstName, SecondName) VALUES(@FirstName, @SecondName)";
    using(var cmd = new SqlCommand(sql, connection))
    {
        cmd.Parameters.AddWithValue("@FirstName", txFirstName.Text);
        cmd.Parameters.AddWithValue("@SecondName", txSecondName.Text);

        cmd.ExecuteNonQuery();
    }
}

Automatically open Chrome developer tools when new tab/new window is opened

There is a command line switch for this: --auto-open-devtools-for-tabs

So for the properties on Google Chrome, use something like this:

"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" --auto-open-devtools-for-tabs

Here is a useful link: chromium-command-line-switches

flutter run: No connected devices

I ran mine with Genymotion, probably the best for Flutter.

Setting up is less painful and

Make sure setting ADB under

--YOUR ANDROID SDK PATH --

Mine is C:\Users\user\AppData\Local\Android\Sdk

Update style of a component onScroll in React.js

Update for an answer with React Hooks

These are two hooks - one for direction(up/down/none) and one for the actual position

Use like this:

useScrollPosition(position => {
    console.log(position)
  })

useScrollDirection(direction => {
    console.log(direction)
  })

Here are the hooks:

import { useState, useEffect } from "react"

export const SCROLL_DIRECTION_DOWN = "SCROLL_DIRECTION_DOWN"
export const SCROLL_DIRECTION_UP = "SCROLL_DIRECTION_UP"
export const SCROLL_DIRECTION_NONE = "SCROLL_DIRECTION_NONE"

export const useScrollDirection = callback => {
  const [lastYPosition, setLastYPosition] = useState(window.pageYOffset)
  const [timer, setTimer] = useState(null)

  const handleScroll = () => {
    if (timer !== null) {
      clearTimeout(timer)
    }
    setTimer(
      setTimeout(function () {
        callback(SCROLL_DIRECTION_NONE)
      }, 150)
    )
    if (window.pageYOffset === lastYPosition) return SCROLL_DIRECTION_NONE

    const direction = (() => {
      return lastYPosition < window.pageYOffset
        ? SCROLL_DIRECTION_DOWN
        : SCROLL_DIRECTION_UP
    })()

    callback(direction)
    setLastYPosition(window.pageYOffset)
  }

  useEffect(() => {
    window.addEventListener("scroll", handleScroll)
    return () => window.removeEventListener("scroll", handleScroll)
  })
}

export const useScrollPosition = callback => {
  const handleScroll = () => {
    callback(window.pageYOffset)
  }

  useEffect(() => {
    window.addEventListener("scroll", handleScroll)
    return () => window.removeEventListener("scroll", handleScroll)
  })
}

failed to lazily initialize a collection of role

Lazy exceptions occur when you fetch an object typically containing a collection which is lazily loaded, and try to access that collection.

You can avoid this problem by

accessing the lazy collection within a transaction.
Initalizing the collection using Hibernate.initialize(obj);
Fetch the collection in another transaction
Use Fetch profiles to select lazy/non-lazy fetching runtime
Set fetch to non-lazy (which is generally not recommended)

Further I would recommend looking at the related links to your right where this question has been answered many times before. Also see Hibernate lazy-load application design.

git remote prune – didn't show as many pruned branches as I expected

When you use git push origin :staleStuff, it automatically removes origin/staleStuff, so when you ran git remote prune origin, you have pruned some branch that was removed by someone else. It's more likely that your co-workers now need to run git prune to get rid of branches you have removed.

So what exactly git remote prune does? Main idea: local branches (not tracking branches) are not touched by git remote prune command and should be removed manually.

Now, a real-world example for better understanding:

You have a remote repository with 2 branches: master and feature. Let's assume that you are working on both branches, so as a result you have these references in your local repository (full reference names are given to avoid any confusion):

refs/heads/master (short name master)
refs/heads/feature (short name feature)
refs/remotes/origin/master (short name origin/master)
refs/remotes/origin/feature (short name origin/feature)

Now, a typical scenario:

Some other developer finishes all work on the feature, merges it into master and removes feature branch from remote repository.
By default, when you do git fetch (or git pull), no references are removed from your local repository, so you still have all those 4 references.
You decide to clean them up, and run git remote prune origin.
git detects that feature branch no longer exists, so refs/remotes/origin/feature is a stale branch which should be removed.
Now you have 3 references, including refs/heads/feature, because git remote prune does not remove any refs/heads/* references.

It is possible to identify local branches, associated with remote tracking branches, by branch.<branch_name>.merge configuration parameter. This parameter is not really required for anything to work (probably except git pull), so it might be missing.

(updated with example & useful info from comments)

Limiting number of displayed results when using ngRepeat

Another (and I think better) way to achieve this is to actually intercept the data. limitTo is okay but what if you're limiting to 10 when your array actually contains thousands?

When calling my service I simply did this:

TaskService.getTasks(function(data){
    $scope.tasks = data.slice(0,10);
});

This limits what is sent to the view, so should be much better for performance than doing this on the front-end.

How do you add a JToken to an JObject?

TL;DR: You should add a JProperty to a JObject. Simple. The index query returns a JValue, so figure out how to get the JProperty instead :)

The accepted answer is not answering the question as it seems. What if I want to specifically add a JProperty after a specific one? First, lets start with terminologies which really had my head worked up.

JToken = The mother of all other types. It can be A JValue, JProperty, JArray, or JObject. This is to provide a modular design to the parsing mechanism.
JValue = any Json value type (string, int, boolean).
JProperty = any JValue or JContainer (see below) paired with a name (identifier). For example "name":"value".
JContainer = The mother of all types which contain other types (JObject, JValue).
JObject = a JContainer type that holds a collection of JProperties
JArray = a JContainer type that holds a collection JValue or JContainer.

Now, when you query Json item using the index [], you are getting the JToken without the identifier, which might be a JContainer or a JValue (requires casting), but you cannot add anything after it, because it is only a value. You can change it itself, query more deep values, but you cannot add anything after it for example.

What you actually want to get is the property as whole, and then add another property after it as desired. For this, you use JOjbect.Property("name"), and then create another JProperty of your desire and then add it after this using AddAfterSelf method. You are done then.

For more info: http://www.newtonsoft.com/json/help/html/ModifyJson.htm

This is the code I modified.

public class Program
{
  public static void Main()
  {
    try
    {
      string jsonText = @"
      {
        ""food"": {
          ""fruit"": {
            ""apple"": {
              ""colour"": ""red"",
              ""size"": ""small""
            },
            ""orange"": {
              ""colour"": ""orange"",
              ""size"": ""large""
            }
          }
        }
      }";

      var foodJsonObj = JObject.Parse(jsonText);
      var bananaJson = JObject.Parse(@"{ ""banana"" : { ""colour"": ""yellow"", ""size"": ""medium""}}");

      var fruitJObject = foodJsonObj["food"]["fruit"] as JObject;
      fruitJObject.Property("orange").AddAfterSelf(new JProperty("banana", fruitJObject));

      Console.WriteLine(foodJsonObj.ToString());
    }
    catch (Exception ex)
    {
      Console.WriteLine(ex.GetType().Name + ": " + ex.Message);
    }
  }
}

Npm Please try using this command again as root/administrator

Close the IDE
Close the node terminals running ng serve or npm start
Go to your project folder/node_modules and see you if can find the package that you are trying to install
If you find the package you are searching then delete package folder
In case, this is your 1st npm install then skip step 4 and delete everything inside the node_modules. If you don't find node_modules then create one folder in your project.
Open the terminal in admin mode and do npm install.

That should fix the issue hopefully

Find nearest latitude/longitude with an SQL query

Check this code based on the article Geo-Distance-Search-with-MySQL:

Example: find the 10 nearest hotels to my current location in a 10 miles radius:

#Please notice that (lat,lng) values mustn't be negatives to perform all calculations

set @my_lat=34.6087674878572; 
set @my_lng=58.3783670308302;
set @dist=10; #10 miles radius

SELECT dest.id, dest.lat, dest.lng,  3956 * 2 * ASIN(SQRT(POWER(SIN((@my_lat -abs(dest.lat)) * pi()/180 / 2),2) + COS(@my_lat * pi()/180 ) * COS(abs(dest.lat) *  pi()/180) * POWER(SIN((@my_lng - abs(dest.lng)) *  pi()/180 / 2), 2))
) as distance
FROM hotel as dest
having distance < @dist
ORDER BY distance limit 10;

#Also notice that distance are expressed in terms of radius.

Playing MP4 files in Firefox using HTML5 video

I can confirm that mp4 just will not work in the video tag. No matter how much you try to mess with the type tag and the codec and the mime types from the server.

Crazy, because for the same exact video, on the same test page, the old embed tag for an mp4 works just fine in firefox. I spent all yesterday messing with this. Firefox is like IE all of a sudden, hours and hours of time, not billable. Yay.

Speaking of IE, it fails FAR MORE gracefully on this. When it can't match up the format it falls to the content between the tags, so it is possible to just put video around object around embed and everything works great. Firefox, nope, despite failing, it puts up the poster image (greyed out so that isn't even useful as a fallback) with an error message smack in the middle. So now the options are put in browser recognition code (meaning we've gained nothing on embedding videos in the last ten years) or ditch html5.

Changing the JFrame title

If your class extends JFrame then use this.setTitle(newTitle.getText());

If not and it contains a JFrame let's say named myFrame, then use myFrame.setTitle(newTitle.getText());

Now that you have posted your program, it is obvious that you need only one JTextField to get the new title. These changes will do the trick:

JTextField poolLengthText, poolWidthText, poolDepthText, poolVolumeText, hotTub,
        hotTubLengthText, hotTubWidthText, hotTubDepthText, hotTubVolumeText, temp, results,
        newTitle;

and:

    public void createOptions()
    {
        options = new JPanel();
        options.setLayout(null);
        JLabel labelOptions = new JLabel("Change Company Name:");
        labelOptions.setBounds(120, 10, 150, 20);
        options.add(labelOptions);
        newTitle = new JTextField("Some Title");
        newTitle.setBounds(80, 40, 225, 20);
        options.add(newTitle);
//        myTitle = new JTextField("My Title...");
//        myTitle.setBounds(80, 40, 225, 20);
//        myTitle.add(labelOptions);
        JButton newName = new JButton("Set New Name");
        newName.setBounds(60, 80, 150, 20);
        newName.addActionListener(this);
        options.add(newName);
        JButton Exit = new JButton("Exit");
        Exit.setBounds(250, 80, 80, 20);
        Exit.addActionListener(this);
        options.add(Exit);
    }

and:

private void New_Name()
{
    this.setTitle(newTitle.getText());
}

How to set shape's opacity?

use this code below as progress.xml:

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:id="@android:id/background">
        <shape>
            <corners android:radius="5dip" />
            <gradient
                    android:startColor="#ff9d9e9d"
                    android:centerColor="#ff5a5d5a"
                    android:centerY="0.75"
                    android:endColor="#ff747674"
                    android:angle="270"
            />
        </shape>
    </item>

    <item android:id="@android:id/secondaryProgress">
        <clip>
            <shape>
                <solid android:color="#00000000" />
            </shape>
        </clip>
    </item>

    <item android:id="@android:id/progress">
        <clip>
            <shape>
                <solid android:color="#00000000" />
            </shape>
        </clip>
    </item>

</layer-list>

where:

"progress" is current progress before the thumb and "secondaryProgress" is the progress after thumb.
color="#00000000" is a perfect transparency
NOTE: the file above is from default android res and is for 2.3.7, it is available on android sources at: frameworks/base/core/res/res/drawable/progress_horizontal.xml. For newer versions you must find the default drawable file for the seekbar corresponding to your android version.

after that use it in the layout containing the xml:

<SeekBar
    android:id="@+id/myseekbar"
    ...
    android:progressDrawable="@drawable/progress"
    />

you can also customize the thumb by using a custom icon seek_thumb.png:

android:thumb="@drawable/seek_thumb"

"relocation R_X86_64_32S against " linking Error

Relocation R_X86_64_PC32 against undefined symbol , usually happens when LDFLAGS are set with hardening and CFLAGS not .
Maybe just user error:
If you are using -specs=/usr/lib/rpm/redhat/redhat-hardened-ld at link time, you also need to use -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 at compile time, and as you are compiling and linking at the same time, you need either both, or drop the -specs=/usr/lib/rpm/redhat/redhat-hardened-ld . Common fixes :
https://bugzilla.redhat.com/show_bug.cgi?id=1304277#c3
https://github.com/rpmfusion/lxdream/blob/master/lxdream-0.9.1-implicit.patch

Getting parts of a URL (Regex)

I tried a few of these that didn't cover my needs, especially the highest voted which didn't catch a url without a path (http://example.com/)

also lack of group names made it unusable in ansible (or perhaps my jinja2 skills are lacking).

so this is my version slightly modified with the source being the highest voted version here:

^((?P<protocol>http[s]?|ftp):\/)?\/?(?P<host>[^:\/\s]+)(?P<path>((\/\w+)*\/)([\w\-\.]+[^#?\s]+))*(.*)?(#[\w\-]+)?$

What is ":-!!" in C code?

Some people seem to be confusing these macros with assert().

These macros implement a compile-time test, while assert() is a runtime test.

Join String list elements with a delimiter in one step

You can use : org.springframework.util.StringUtils;

String stringDelimitedByComma = StringUtils.collectionToCommaDelimitedString(myList);

Excel 2010 VBA Referencing Specific Cells in other worksheets

Sub Results2()

    Dim rCell As Range
    Dim shSource As Worksheet
    Dim shDest As Worksheet
    Dim lCnt As Long

    Set shSource = ThisWorkbook.Sheets("Sheet1")
    Set shDest = ThisWorkbook.Sheets("Sheet2")

    For Each rCell In shSource.Range("A1", shSource.Cells(shSource.Rows.Count, 1).End(xlUp)).Cells
        lCnt = lCnt + 1
        shDest.Range("A4").Offset(0, lCnt * 4).Formula = "=" & rCell.Address(False, False, , True) & "+" & rCell.Offset(0, 1).Address(False, False, , True)
    Next rCell

End Sub

This loops through column A of sheet1 and creates a formula in sheet2 for every cell. To find the last cell in Sheet1, I start at the bottom (shSource.Rows.Count) and .End(xlUp) to get the last cell in the column that's not blank.

To create the elements of the formula, I use the Address property of the cell on Sheet. I'm using three of the arguments to Address. The first two are RowAbsolute and ColumnAbsolute, both set to false. I don't care about the third argument, but I set the fourth argument (External) to True so that it includes the sheet name.

I prefer to go from Source to Destination rather than the other way. But that's just a personal preference. If you want to work from the destination,

Sub Results3()

    Dim i As Long, lCnt As Long
    Dim sh As Worksheet

    lCnt = Application.WorksheetFunction.CountA(ThisWorkbook.Sheets("Sheet1").Columns(1))
    Set sh = ThisWorkbook.Sheets("Sheet2")

    Const sSOURCE As String = "Sheet1!"

    For i = 1 To lCnt
        sh.Range("A1").Offset(0, 4 * (i - 1)).Formula = "=" & sSOURCE & "A" & i & " + " & sSOURCE & "B" & i
    Next i

End Sub

How to edit CSS style of a div using C# in .NET

If all you want to do is conditionally show or hide a <div>, then you could declare it as an <asp:panel > (renders to html as a div tag) and set it's .Visible property.

Reloading .env variables without restarting server (Laravel 5, shared hosting)

It's possible that your configuration variables are cached. Verify your config/app.php as well as your .env file then try

php artisan cache:clear

on the command line.

Server Client send/receive simple text

CLIENT

namespace SocketKlient

{
    class Program

    {
        static Socket Klient;
        static IPEndPoint endPoint;
        static void Main(string[] args)
        {
            Klient = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            string command;
            Console.WriteLine("Write IP address");
            command = Console.ReadLine();
            IPAddress Address;
            while(!IPAddress.TryParse(command, out Address)) 
            {
                Console.WriteLine("wrong IP format");
                command = Console.ReadLine();
            }
            Console.WriteLine("Write port");
            command = Console.ReadLine();

            int port;
            while (!int.TryParse(command, out port) && port > 0)
            {
                Console.WriteLine("Wrong port number");
                command = Console.ReadLine();
            }
            endPoint = new IPEndPoint(Address, port); 
            ConnectC(Address, port);
            while(Klient.Connected)
            {
                Console.ReadLine();
                Odesli();
            }
        }

        public static void ConnectC(IPAddress ip, int port)
        {
            IPEndPoint endPoint = new IPEndPoint(ip, port);
            Console.WriteLine("Connecting...");
            try
            {
                Klient.Connect(endPoint);
                Console.WriteLine("Connected!");
            }
            catch
            {
                Console.WriteLine("Connection fail!");
                return; 
            }
            Task t = new Task(WaitForMessages); 
            t.Start(); 
        }

        public static void SendM()
        {
            string message = "Actualy date is " + DateTime.Now; 
            byte[] buffer = Encoding.UTF8.GetBytes(message);
            Console.WriteLine("Sending: " + message);
            Klient.Send(buffer);
        }

        public static void WaitForMessages()
        {
            try
            {
                while (true)
                {
                    byte[] buffer = new byte[64]; 
                    Console.WriteLine("Waiting for answer");
                    Klient.Receive(buffer, 0, buffer.Length, 0); 

                    string message = Encoding.UTF8.GetString(buffer); 
                    Console.WriteLine("Answer: " + message); 
                }
            }
            catch
            {
                Console.WriteLine("Disconnected");
            }
        }
    }
}

Date Conversion from String to sql Date in Java giving different output?

mm stands for "minutes". Use MM instead:

SimpleDateFormat sdf1 = new SimpleDateFormat("dd-MM-yyyy");

SQL Query to concatenate column values from multiple rows in Oracle

There's also an XMLAGG function, which works on versions prior to 11.2. Because WM_CONCAT is undocumented and unsupported by Oracle, it's recommended not to use it in production system.

With XMLAGG you can do the following:

SELECT XMLAGG(XMLELEMENT(E,ename||',')).EXTRACT('//text()') "Result" 
FROM employee_names

What this does is

put the values of the ename column (concatenated with a comma) from the employee_names table in an xml element (with tag E)
extract the text of this
aggregate the xml (concatenate it)
call the resulting column "Result"

How to flush route table in windows?

route -f causes damage. So we need to either disconnect the correct parts of the routing table or find out how to rebuild it.

What is the '.well' equivalent class in Bootstrap 4

None of the answers seemed to work well with buttons. Bootstrap v4.1.1

<div class="card bg-light">
    <div class="card-body">
        <button type="submit" class="btn btn-primary">
            Save
        </button>
        <a href="/" class="btn btn-secondary">
            Cancel
        </a>
    </div>
</div>

Mixed mode assembly is built against version ‘v2.0.50727' of the runtime

If the error happens with error column "File" as SGEN, then the fix needs to be in a file sgen.exe.config, next to sgen.exe. For example, for VS 2015, create C:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.6 Tools\sgen.exe.config. Minimum file contents: <configuration><startup useLegacyV2RuntimeActivationPolicy="true"/></configuration>

Source: SGEN Mixed mode assembly

Adjusting and image Size to fit a div (bootstrap)

Just a heads up that Bootstrap 4 now uses img-fluid instead of img-responsive, so double check which version you're using if you're having problems.

sorting integers in order lowest to highest java

if array.sort doesn't have what your looking for you can try this:

package drawFramePackage;
import java.awt.geom.AffineTransform;
import java.util.ArrayList;
import java.util.ListIterator;
import java.util.Random;
public class QuicksortAlgorithm {
    ArrayList<AffineTransform> affs;
    ListIterator<AffineTransform> li;
    Integer count, count2;
    /**
     * @param args
     */
    public static void main(String[] args) {
        new QuicksortAlgorithm();
    }
    public QuicksortAlgorithm(){
        count = new Integer(0);
        count2 = new Integer(1);
        affs = new ArrayList<AffineTransform>();
        for (int i = 0; i <= 128; i++){
            affs.add(new AffineTransform(1, 0, 0, 1, new Random().nextInt(1024), 0));
        }
        affs = arrangeNumbers(affs);
        printNumbers();
    }
    public ArrayList<AffineTransform> arrangeNumbers(ArrayList<AffineTransform> list){
        while (list.size() > 1 && count != list.size() - 1){
            if (list.get(count2).getTranslateX() > list.get(count).getTranslateX()){
                list.add(count, list.get(count2));
                list.remove(count2 + 1);
            }
            if (count2 == list.size() - 1){
                count++;
                count2 = count + 1;
            }
            else{
            count2++;
            }
        }
        return list;
    }
    public void printNumbers(){
        li = affs.listIterator();
        while (li.hasNext()){
            System.out.println(li.next());
        }
    }
}

What is difference between png8 and png24

While making image with fully transparent background in PNG-8, the outline of the image looks prominent with little white bits. But in PNG-24 the outline is gone and looks perfect. Transparency in PNG-24 is greater and cleaner than PNG-8.

PNG-8 contains 256 colors, while PNG-24 contains 16 million colors.

File size is almost double in PNG-24 than PNG-8.

How do I detect whether 32-bit Java is installed on x64 Windows, only looking at the filesystem and registry?

just write "java -d64 -version" or d32 and if you have It installed it will give a response with current version installed

Is there any JSON Web Token (JWT) example in C#?

Here is the list of classes and functions:

open System
open System.Collections.Generic
open System.Linq
open System.Threading.Tasks
open Microsoft.AspNetCore.Mvc
open Microsoft.Extensions.Logging
open Microsoft.AspNetCore.Authorization
open Microsoft.AspNetCore.Authentication
open Microsoft.AspNetCore.Authentication.JwtBearer
open Microsoft.IdentityModel.Tokens
open System.IdentityModel.Tokens
open System.IdentityModel.Tokens.Jwt
open Microsoft.IdentityModel.JsonWebTokens
open System.Text
open Newtonsoft.Json
open System.Security.Claims
    let theKey = "VerySecretKeyVerySecretKeyVerySecretKey"
    let securityKey = SymmetricSecurityKey(Encoding.UTF8.GetBytes(theKey))
    let credentials = SigningCredentials(securityKey, SecurityAlgorithms.RsaSsaPssSha256)
    let expires = DateTime.UtcNow.AddMinutes(123.0) |> Nullable
    let token = JwtSecurityToken(
                    "lahoda-pro-issuer", 
                    "lahoda-pro-audience",
                    claims = null,
                    expires =  expires,
                    signingCredentials = credentials
        )

    let tokenString = JwtSecurityTokenHandler().WriteToken(token)

javascript function wait until another function to finish

In my opinion, deferreds/promises (as you have mentionned) is the way to go, rather than using timeouts.

Here is an example I have just written to demonstrate how you could do it using deferreds/promises.

Take some time to play around with deferreds. Once you really understand them, it becomes very easy to perform asynchronous tasks.

Hope this helps!

$(function(){
    function1().done(function(){
        // function1 is done, we can now call function2
        console.log('function1 is done!');

        function2().done(function(){
            //function2 is done
            console.log('function2 is done!');
        });
    });
});

function function1(){
    var dfrd1 = $.Deferred();
    var dfrd2= $.Deferred();

    setTimeout(function(){
        // doing async stuff
        console.log('task 1 in function1 is done!');
        dfrd1.resolve();
    }, 1000);

    setTimeout(function(){
        // doing more async stuff
        console.log('task 2 in function1 is done!');
        dfrd2.resolve();
    }, 750);

    return $.when(dfrd1, dfrd2).done(function(){
        console.log('both tasks in function1 are done');
        // Both asyncs tasks are done
    }).promise();
}

function function2(){
    var dfrd1 = $.Deferred();
    setTimeout(function(){
        // doing async stuff
        console.log('task 1 in function2 is done!');
        dfrd1.resolve();
    }, 2000);
    return dfrd1.promise();
}

Set auto height and width in CSS/HTML for different screen sizes

Using bootstrap with a little bit of customization, the following seems to work for me:

I need 3 partitions in my container and I tried this:

CSS:

.row.content {height: 100%; width:100%; position: fixed; }
.sidenav {
  padding-top: 20px;
  border: 1px solid #cecece;
  height: 100%;
}
.midnav {
  padding: 0px;
}

HTML:

  <div class="container-fluid text-center"> 
    <div class="row content">
    <div class="col-md-2 sidenav text-left">Some content 1</div>
    <div class="col-md-9 midnav text-left">Some content 2</div>
    <div class="col-md-1 sidenav text-center">Some content 3</div>
    </div>
  </div>

Entity Framework 6 GUID as primary key: Cannot insert the value NULL into column 'Id', table 'FileStore'; column does not allow nulls

try this :

public class FileStore
 {
   [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
   public Guid Id { get; set; }
   public string Name { get; set; }
   public string Path { get; set; }
 }

You can check this SO post.

Tests not running in Test Explorer

TLDR: Update the testing packages, look into the output -> test console

I struggled with this for a day and a half. so here's what I did to solve it:

Symptoms

5 Unit test projects, all discoverable in TestExplorer
2 out of 5 executed properly
3 stating not run at all
The problem started after a .net framework update

Investigation

Since all the packages were updated during the .net framework update, I started with the differences between the working and not working projects. The first clue was that all 3 projects were using: MSTest.TestAdapter and MSTest.TestFramework

Naturally I went to the -> Output console -> Test dropdown in VS 2019 and looked at the output. Nothing useful there.

Step one of the solution: Update the MSTest.TestAdapter and MSTest.TestFramework to version 2.0.0

Step two of the solution: Now the Output console -> Test dropdown output started showing one after the other, missing packages and wrong binding redirects

Step three of the solution: Manually add the missing packages. For me those were

System.Runtime.Extentions
System.Reflection
Maybe some more that I'm missing

Step 4 of the solution: Removed/Fixed the unnecessary binding redirects.

I hope this will help someone else.

SHA1 vs md5 vs SHA256: which to use for a PHP login?

Neither. You should use bcrypt. The hashes you mention are all optimized to be quick and easy on hardware, and so cracking them share the same qualities. If you have no other choice, at least be sure to use a long salt and re-hash multiple times.

Using bcrypt in PHP 5.5+

PHP 5.5 offers new functions for password hashing. This is the recommend approach for password storage in modern web applications.

// Creating a hash
$hash = password_hash($password, PASSWORD_DEFAULT, ['cost' => 12]);
// If you omit the ['cost' => 12] part, it will default to 10

// Verifying the password against the stored hash  
if (password_verify($password, $hash)) {
    // Success! Log the user in here.
}

If you're using an older version of PHP you really should upgrade, but until you do you can use password_compat to expose this API.

Also, please let password_hash() generate the salt for you. It uses a CSPRNG.

Two caveats of bcrypt

Bcrypt will silently truncate any password longer than 72 characters.
Bcrypt will truncate after any NUL characters.

(Proof of Concept for both caveats here.)

You might be tempted to resolve the first caveat by pre-hashing your passwords before running them through bcrypt, but doing so can cause your application to run headfirst into the second.

Instead of writing your own scheme, use an existing library written and/or evaluated by security experts.

Zend\Crypt (part of Zend Framework) offers BcryptSha
PasswordLock is similar to BcryptSha but it also encrypts the bcrypt hashes with an authenticated encryption library.

TL;DR - Use bcrypt.

How to use shared memory with Linux in C

try this code sample, I tested it, source: http://www.makelinux.net/alp/035

#include <stdio.h> 
#include <sys/shm.h> 
#include <sys/stat.h> 

int main () 
{
  int segment_id; 
  char* shared_memory; 
  struct shmid_ds shmbuffer; 
  int segment_size; 
  const int shared_segment_size = 0x6400; 

  /* Allocate a shared memory segment.  */ 
  segment_id = shmget (IPC_PRIVATE, shared_segment_size, 
                 IPC_CREAT | IPC_EXCL | S_IRUSR | S_IWUSR); 
  /* Attach the shared memory segment.  */ 
  shared_memory = (char*) shmat (segment_id, 0, 0); 
  printf ("shared memory attached at address %p\n", shared_memory); 
  /* Determine the segment's size. */ 
  shmctl (segment_id, IPC_STAT, &shmbuffer); 
  segment_size  =               shmbuffer.shm_segsz; 
  printf ("segment size: %d\n", segment_size); 
  /* Write a string to the shared memory segment.  */ 
  sprintf (shared_memory, "Hello, world."); 
  /* Detach the shared memory segment.  */ 
  shmdt (shared_memory); 

  /* Reattach the shared memory segment, at a different address.  */ 
  shared_memory = (char*) shmat (segment_id, (void*) 0x5000000, 0); 
  printf ("shared memory reattached at address %p\n", shared_memory); 
  /* Print out the string from shared memory.  */ 
  printf ("%s\n", shared_memory); 
  /* Detach the shared memory segment.  */ 
  shmdt (shared_memory); 

  /* Deallocate the shared memory segment.  */ 
  shmctl (segment_id, IPC_RMID, 0); 

  return 0; 
}

selenium - chromedriver executable needs to be in PATH

You can download ChromeDriver here: https://sites.google.com/a/chromium.org/chromedriver/downloads

Then you have multiple options:

add it to your system path
put it in the same directory as your python script

specify the location directly via executable_path

driver = webdriver.Chrome(executable_path='C:/path/to/chromedriver.exe')

Trim string in JavaScript?

The trim from jQuery is convenient if you are already using that framework.

$.trim('  your string   ');

I tend to use jQuery often, so trimming strings with it is natural for me. But it's possible that there is backlash against jQuery out there? :)

Circle button css

_x000D_

.round-button {_x000D_
  width:25%;_x000D_
}_x000D_
.round-button-circle {_x000D_
  width: 100%;_x000D_
  height:0;_x000D_
  padding-bottom: 100%;_x000D_
  border-radius: 50%;_x000D_
  border:10px solid #cfdcec;_x000D_
  overflow:hidden;_x000D_
        _x000D_
  background: #4679BD; _x000D_
  box-shadow: 0 0 3px gray;_x000D_
}_x000D_
.round-button-circle:hover {_x000D_
  background:#30588e;_x000D_
}_x000D_
.round-button a {_x000D_
  display:block;_x000D_
  float:left;_x000D_
  width:100%;_x000D_
  padding-top:50%;_x000D_
  padding-bottom:50%;_x000D_
  line-height:1em;_x000D_
  margin-top:-0.5em;_x000D_
        _x000D_
  text-align:center;_x000D_
  color:#e2eaf3;_x000D_
  font-family:Verdana;_x000D_
  font-size:1.2em;_x000D_
  font-weight:bold;_x000D_
  text-decoration:none;_x000D_
}

_x000D_

<div class="round-button"><div class="round-button-circle"><a href="http://example.com" class="round-button">Button!!</a></div></div>

_x000D_

or very simple for <a/>

_x000D_

.round-button {_x000D_
    display:block;_x000D_
    width:80px;_x000D_
    height:80px;_x000D_
    line-height:80px;_x000D_
    border: 2px solid #f5f5f5;_x000D_
    border-radius: 50%;_x000D_
    color:#f5f5f5;_x000D_
    text-align:center;_x000D_
    text-decoration:none;_x000D_
    background: #555777;_x000D_
    box-shadow: 0 0 3px gray;_x000D_
    font-size:20px;_x000D_
    font-weight:bold;_x000D_
}_x000D_
.round-button:hover {_x000D_
    background: #777555;_x000D_
}

_x000D_

<a href="http://example.com" class="round-button">Button</a>

_x000D_

for jsfiddle reference click here

How to use PHP to connect to sql server

 $server_name = "your server name";
 $database_name = "your database name";
 try
  {
   $conn = new PDO("sqlsrv:Server=$server_name;Database=$database_name;ConnectionPooling=0", "user_name", "password");
   $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

}
catch(PDOException $e)
{

    $e->getMessage();

}

Run php script as daemon process

You can

Use nohup as Henrik suggested.
Use screen and run your PHP program as a regular process inside that. This gives you more control than using nohup.
Use a daemoniser like http://supervisord.org/ (it's written in Python but can daemonise any command line program and give you a remote control to manage it).
Write your own daemonise wrapper like Emil suggested but it's overkill IMO.

I'd recommend the simplest method (screen in my opinion) and then if you want more features or functionality, move to more complex methods.

How to overcome "datetime.datetime not JSON serializable"?

The json.dumps method can accept an optional parameter called default which is expected to be a function. Every time JSON tries to convert a value it does not know how to convert it will call the function we passed to it. The function will receive the object in question, and it is expected to return the JSON representation of the object.

def myconverter(o):
 if isinstance(o, datetime.datetime):
    return o.__str__()

print(json.dumps(d, default = myconverter))

Getting msbuild.exe without installing Visual Studio

The latest (as of Jan 2019) stand-alone MSBuild installers can be found here: https://www.visualstudio.com/downloads/

Scroll down to "Tools for Visual Studio 2019" and choose "Build Tools for Visual Studio 2019" (despite the name, it's for users who don't want the full IDE)

See this question for additional information.

How Does Modulus Divison Work

This was the best approach for me for understanding modulus operator. I will just explain to you through examples.

16 % 3

When you division these two number, remainder is the result. This is the way how i do it.

16 % 3 = 3 + 3 = 6; 6 + 3 = 9; 9 + 3 = 12; 12 + 3 = 15

So what is left to 16 is 1

16 % 3 = 1

Here is one more example: 16 % 7 = 7 + 7 = 14 what is left to 16? Is 2 16 % 7 = 2

One more: 24 % 6 = 6 + 6 = 12; 12 + 6 = 18; 18 + 6 = 24. So remainder is zero, 24 % 6 = 0

Opposite of %in%: exclude rows with values specified in a vector

How about:

'%ni%' <- Negate('%in%')
c(1,3,11) %ni% 1:10
# [1] FALSE FALSE  TRUE

What is the significance of url-pattern in web.xml and how to configure servlet?

url-pattern is used in web.xml to map your servlet to specific URL. Please see below xml code, similar code you may find in your web.xml configuration file.

<servlet>
    <servlet-name>AddPhotoServlet</servlet-name>  //servlet name
    <servlet-class>upload.AddPhotoServlet</servlet-class>  //servlet class
</servlet>
 <servlet-mapping>
    <servlet-name>AddPhotoServlet</servlet-name>   //servlet name
    <url-pattern>/AddPhotoServlet</url-pattern>  //how it should appear
</servlet-mapping>

If you change url-pattern of AddPhotoServlet from /AddPhotoServlet to /MyUrl. Then, AddPhotoServlet servlet can be accessible by using /MyUrl. Good for the security reason, where you want to hide your actual page URL.

Java Servlet url-pattern Specification:

A string beginning with a '/' character and ending with a '/*' suffix is used for path mapping.

A string beginning with a '*.' prefix is used as an extension mapping.

A string containing only the '/' character indicates the "default" servlet of the application. In this case the servlet path is the request URI minus the context path and the path info is null.

All other strings are used for exact matches only.

Reference : Java Servlet Specification

You may also read this Basics of Java Servlet

Java - creating a new thread

The goal was to write code to call start() and join() in one place. Parameter anonymous class is an anonymous function. new Thread(() ->{})

new Thread(() ->{
        System.out.println("Does it work?");
        Thread.sleep(1000);
        System.out.println("Nope, it doesnt...again.");       
}){{start();}}.join();

In the body of an anonymous class has instance-block that calls start(). The result is a new instance of class Thread, which is called join().

Download all stock symbol list of a market

You can download a list of symbols from here. You have an option to download the whole list directly into excel file. You will have to register though.

How to set UTF-8 encoding for a PHP file

Html:

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<meta name="x" content="xx" />

vs Php:

<?php header('Content-type: text/html; charset=ISO-8859-1'); ?>
<!DOCTYPE HTML>
<html>
<head>
<meta name="x" content="xx" />

Find duplicate characters in a String and count the number of occurances using Java

Finding the duplicates in a String:

Example 1 : Using HashMap

public class a36 {
    public static void main(String[] args) {
        String a = "Gini Rani";
        fix(a);
    }//main
    public static void fix(String a ){
        Map<Character ,Integer> map = new HashMap<>();
        for (int i = 0; i <a.length() ; i++ ) {
        char ch = a.charAt(i);
                map.put(ch , map.getOrDefault(ch,0) +1 );
        }//for

       List<Character> list = new ArrayList<>();
       Set<Map.Entry<Character ,Integer> > entrySet = map.entrySet();

       for (  Map.Entry<Character ,Integer> entry : entrySet) {
             list.add( entry.getKey()  ); 

             System.out.printf(  " %s : %d %n" ,  entry.getKey(), entry.getValue()           );
       }//for
       System.out.println("Duplicate elements => " + list);

    }//fix
}

Example 2 : using Arrays.stream() in Java 8

public class a37 {
    public static void main(String[] args) {
        String aa = "Protijayi Gini";
        String[] stringarray = aa.split("");

    Map<String , Long> map =  Arrays.stream(stringarray)
        .collect(Collectors.groupingBy(c -> c , Collectors.counting()));
        map.forEach( (k, v) -> System.out.println(k + " : "+ v)        );
    }
}

Adding sheets to end of workbook in Excel (normal method not working?)

Try this

mainWB.Sheets.Add(After:=mainWB.Sheets(mainWB.Sheets.Count)).Name = new_sheet_name

urlencode vs rawurlencode?

Spaces encoded as `%20` vs. `+`

The biggest reason I've seen to use rawurlencode() in most cases is because urlencode encodes text spaces as + (plus signs) where rawurlencode encodes them as the commonly-seen %20:

echo urlencode("red shirt");
// red+shirt

echo rawurlencode("red shirt");
// red%20shirt

I have specifically seen certain API endpoints that accept encoded text queries expect to see %20 for a space and as a result, fail if a plus sign is used instead. Obviously this is going to differ between API implementations and your mileage may vary.

Is there an exponent operator in C#?

Since no-one has yet wrote a function to do this with two integers, here's one way:

private long CalculatePower(int number, int powerOf)
{
    for (int i = powerOf; i > 1; i--)
        number *= number;
    return number;
}
CalculatePower(5, 3); // 125
CalculatePower(8, 4); // 4096
CalculatePower(6, 2); // 36

Alternatively in VB.NET:

Private Function CalculatePower(number As Integer, powerOf As Integer) As Long
    For i As Integer = powerOf To 2 Step -1
        number *= number
    Next
    Return number
End Function
CalculatePower(5, 3) ' 125
CalculatePower(8, 4) ' 4096
CalculatePower(6, 2) ' 36

What is a LAMP stack?

L for Linux operating system A for apache web server M for Mysql database p for php for scripting and php modules

We can host php programs and cgi programs in LAMP system.

eg: In ubuntu apt-get install apache2 for web server apt-get install mysql-server php5-mysql for database and php apt-get install php5 and got to your web server http://localhost

MATLAB - multiple return values from a function?

Change the function that you get one single Result=[array, listp, freep]. So there is only one result to be displayed

How to loop through a directory recursively to delete files with certain extensions

This doesn't answer your question directly, but you can solve your problem with a one-liner:

find /tmp \( -name "*.pdf" -o -name "*.doc" \) -type f -exec rm {} +

Some versions of find (GNU, BSD) have a -delete action which you can use instead of calling rm:

find /tmp \( -name "*.pdf" -o -name "*.doc" \) -type f -delete

How to make div go behind another div?

http://jsfiddle.net/f2znvn4f/

HTML

<div class="box-left-mini">
    <div class="front"><span>this is in front</span></div>
    <div class="behind_container">
        <div class="behind">behind</div>        
    </div>
</div>

CSS

.box-left-mini{
    float:left;
    background-image:url(website-content/hotcampaign.png);
    width:292px;
    height:141px;
}

.box-left-mini .front {
    display: block;
    z-index: 5;
    position: relative;
}
.box-left-mini .front span {
    background: #fff
}

.box-left-mini .behind_container {
    background-color: #ff0;
    position: relative;
    top: -18px;
}
.box-left-mini .behind {
    display: block;
    z-index: 3;
}

The reason you're getting so many different answers is because you've not explained what you want to do exactly. All the answers you get with code will be programmatically correct, but it's all down to what you want to achieve

401 Unauthorized: Access is denied due to invalid credentials

In my case,
My application is developed in MVC and my home controller class was decorated with [Authorize] which was causing this issue.
So I've removed it because my application don't require any authentication.

How to get the date and time values in a C program?

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

struct date
{
    int month;
    int day;
    int year;
};

int calcN(struct date d)
{
    int N;
    int f(struct date d);
    int g(int m);

    N = 1461 * f(d) / 4 + 153 * g(d.month) / 5 + d.day;

    if(d.year < 1700 || (d.year == 1700 && d.month < 3))
    {
        printf("Date must be after February 29th, 1700\n");

        return 0;
    }
    else if(d.year < 1800 || (d.year == 1800 && d.month < 3))
        N += 2;
    else if(d.year < 1900 || (d.year == 1900 && d.month < 3))
        N += 1;    

    return N;
}

int f(struct date d)
{
    if(d.month <= 2)
        d.year -= 1;

    return d.year;
}

int g(int m)
{
    if(m <=2)
        m += 13;
    else
        m += 1;
    
    return m;
}

int main(void)
{
    int calcN(struct date d);
    struct date d1, d2;
    int N1, N2;
    time_t t;

    time(&t);
    struct tm *now = localtime(&t);


    d1.month = now->tm_mon + 1;
    d1.day = now->tm_mday;
    d1.year = now->tm_year + 1900;

    printf("Today's date: %02i/%02i/%i\n", d1.month, d1.day, d1.year);

    N1 = calcN(d1);

    printf("Enter birthday (mm dd yyyy): ");
    scanf("%i%i%i", &d2.month, &d2.day, &d2.year);

    N2 = calcN(d2);

    if(N2 == 0)
        return 0;

    printf("Number of days since birthday: %i\n", N1 - N2);

    return 0;
}

What does <a href="#" class="view"> mean?

The href is probably generated in a javascript function. For example with jQuery:

$(function() {
    $('a.view').attr('href', 'http://www.google.com');
});

What is the best open XML parser for C++?

pugixml - Light-weight, simple and fast XML parser for C++ Very small (comparable to RapidXML), very fast (comparable to RapidXML), very easy to use (better than RapidXML).

Android WebView not loading URL

Just as an alternative solution:

For me webView.getSettings().setUserAgentString("Android WebView") did the trick.

I already had implemented INTERNET permission and WebViewClient as well as WebChromeClient

Hide/Show Action Bar Option Menu Item for different fragments

This is one way of doing this:

add a "group" to your menu:

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

    <group
        android:id="@+id/main_menu_group">
         <item android:id="@+id/done_item"
              android:title="..."
              android:icon="..."
              android:showAsAction="..."/>
    </group>
</menu>

then, add a

Menu menu;

variable to your activity and set it in your override of onCreateOptionsMenu:

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    this.menu = menu;
    // inflate your menu here
}

After, add and use this function to your activity when you'd like to show/hide the menu:

public void showOverflowMenu(boolean showMenu){
    if(menu == null)
        return;
    menu.setGroupVisible(R.id.main_menu_group, showMenu);
}

I am not saying this is the best/only way, but it works well for me.

How to loop through an array of objects in swift

Your userPhotos array is option-typed, you should retrieve the actual underlying object with ! (if you want an error in case the object isn't there) or ? (if you want to receive nil in url):

let userPhotos = currentUser?.photos

for var i = 0; i < userPhotos!.count ; ++i {
    let url = userPhotos![i].url
}

But to preserve safe nil handling, you better use functional approach, for instance, with map, like this:

let urls = userPhotos?.map{ $0.url }

BadImageFormatException. This will occur when running in 64 bit mode with the 32 bit Oracle client components installed

Just build your code in x86 mode not in AnyCpu.

How to inject Javascript in WebBrowser control?

The managed wrapper for the HTML document doesn't completely implement the functionality you need, so you need to dip into the MSHTML API to accomplish what you want:

1) Add a reference to MSHTML, which will probalby be called "Microsoft HTML Object Library" under COM references.

2) Add 'using mshtml;' to your namespaces.

3) Get a reference to your script element's IHTMLElement:

IHTMLElement iScriptEl = (IHTMLElement)scriptEl.DomElement;

4) Call the insertAdjacentText method, with the first parameter value of "afterBegin". All the possible values are listed here:

iScriptEl.insertAdjacentText("afterBegin", "function sayHello() { alert('hello') }");

5) Now you'll be able to see the code in the scriptEl.InnerText property.

Hth, Richard

Increase number of axis ticks

You can override ggplots default scales by modifying scale_x_continuous and/or scale_y_continuous. For example:

library(ggplot2)
dat <- data.frame(x = rnorm(100), y = rnorm(100))

ggplot(dat, aes(x,y)) +
  geom_point()

Gives you this:

enter image description here

And overriding the scales can give you something like this:

ggplot(dat, aes(x,y)) +
  geom_point() +
  scale_x_continuous(breaks = round(seq(min(dat$x), max(dat$x), by = 0.5),1)) +
  scale_y_continuous(breaks = round(seq(min(dat$y), max(dat$y), by = 0.5),1))

enter image description here

If you want to simply "zoom" in on a specific part of a plot, look at xlim() and ylim() respectively. Good insight can also be found here to understand the other arguments as well.

Convert DateTime in C# to yyyy-MM-dd format and Store it to MySql DateTime Field

Try setting a custom CultureInfo for CurrentCulture and CurrentUICulture.

Globalization.CultureInfo customCulture = new Globalization.CultureInfo("en-US", true);

customCulture.DateTimeFormat.ShortDatePattern = "yyyy-MM-dd h:mm tt";

System.Threading.Thread.CurrentThread.CurrentCulture = customCulture;
System.Threading.Thread.CurrentThread.CurrentUICulture = customCulture;

DateTime newDate = System.Convert.ToDateTime(DateTime.Now.ToString("yyyy-MM-dd h:mm tt"));

Server did not recognize the value of HTTP Header SOAPAction

I had a similar problem with the same error message:

System.Web.Services.Protocols.SoapException: Server did not recognize the value of HTTP Header SOAPAction:

We utilize dynamic URL's in our web service calls. We have a central configuration server that manages the location of all web service calls so that our code can run in DEV, test or live without recompiling. The URL for a specific web service call for the test environment was incorrect in our configuration server. The web service call was being sent to the wrong server and the wrong web service.

So this error can simply be the result of the web service request not matching the web service being called.

It took running fiddler on the Web App server to see that the actual call was to the incorrect web service.

SQL Server 2008 - Help writing simple INSERT Trigger

cmsjr had the right solution. I just wanted to point out a couple of things for your future trigger development. If you are using the values statement in an insert in a trigger, there is a stong possibility that you are doing the wrong thing. Triggers fire once for each batch of records inserted, deleted, or updated. So if ten records were inserted in one batch, then the trigger fires once. If you are refering to the data in the inserted or deleted and using variables and the values clause then you are only going to get the data for one of those records. This causes data integrity problems. You can fix this by using a set-based insert as cmsjr shows above or by using a cursor. Don't ever choose the cursor path. A cursor in a trigger is a problem waiting to happen as they are slow and may well lock up your table for hours. I removed a cursor from a trigger once and improved an import process from 40 minutes to 45 seconds.

You may think nobody is ever going to add multiple records, but it happens more frequently than most non-database people realize. Don't write a trigger that will not work under all the possible insert, update, delete conditions. Nobody is going to use the one record at a time method when they have to import 1,000,000 sales target records from a new customer or update all the prices by 10% or delete all the records from a vendor whose products you don't sell anymore.

Why do I get an error instantiating an interface?

Imagine if one went into a store and asked for a device with a power switch. You didn't say whether you wanted a copier, television, vacuum cleaner, desk lamp, waffle maker, or anything. You asked for a device with a power switch. Would you expect the clerk to offer you something that could only be described as "a device with a power switch"?

A typical interface would be analogous to the description "a device with a power switch". Knowing that a piece of equipment is " a device with a power switch" would allow one to do some operations with it (i.e. turn it on and off), and one might plausibly want a list of e.g. "devices with power switches that will need to be turned off at the end of the day", without the devices having to share any characteristic beyond having a power switch, but such situations generally only apply when applying some common operation to devices that were created for some more specific purpose. When creating something from scratch, one would more likely wand a "copier", "television", "vacuum cleaner", or other particular type of device, than some random "device with a power switch".

There are some circumstances where one may want a vaguely-defined object, and really not care about what exactly it is. "Give me your cheapest device that can boil water". It would be nice if one could specify that when someone asks for an arbitrary object with "water boiling" ability, they should be offered an Acme 359 Electric Teakettle, and indeed when using classes it's possible to do that. Note, however, that someone who asks for a "device to boil water" would not be given a "device to boil water", but an "Acme 359 Electric Teakettle".

How to force keyboard with numbers in mobile website in Android

Add a step attribute to the number input

<input type="number" step="0.01">

Source: http://blog.pamelafox.org/2012/05/triggering-numeric-keyboards-with-html5.html

ActionBarActivity is deprecated

Since the version 22.1.0, the class ActionBarActivity is deprecated. You should use AppCompatActivity.

Read here and here for more information.

Get current time in hours and minutes

I have another solution for your question .

In the first when use date the output is like this :

Thu 28 Jan 2021 22:29:40 IST

Then if you want only to show current time in hours and minutes you can use this command :

date | cut -d " " -f5 | cut -d ":" -f1-2

Then the output :

22:29

MySQL ORDER BY multiple column ASC and DESC

group by default order by pk id,so the result
username point avg_time
demo123 100 90 ---> id = 4
demo123456 100 100 ---> id = 7
demo 90 120 ---> id = 1

Write applications in C or C++ for Android?

There is a plan to allow C/C++ libraries in the next SDK version of Android (Codename Eclair?)To date, it's not possible through the Android Java SDK. However, you can grab the HUGE open source project, roll your own libraries, and then flash your own device...but anyone who wants to use your library will have to flash your custom build as well.

How do I read a file line by line in VB Script?

When in doubt, read the documentation:

filename = "C:\Temp\vblist.txt"

Set fso = CreateObject("Scripting.FileSystemObject")
Set f = fso.OpenTextFile(filename)

Do Until f.AtEndOfStream
  WScript.Echo f.ReadLine
Loop

f.Close

How to use the 'replace' feature for custom AngularJS directives?

`replace:true` is Deprecated

From the Docs:

replace ([DEPRECATED!], will be removed in next major release - i.e. v2.0)

specify what the template should replace. Defaults to false.

true - the template will replace the directive's element.

false - the template will replace the contents of the directive's element.

-- AngularJS Comprehensive Directive API

From GitHub:

Caitp-- It's deprecated because there are known, very silly problems with replace: true, a number of which can't really be fixed in a reasonable fashion. If you're careful and avoid these problems, then more power to you, but for the benefit of new users, it's easier to just tell them "this will give you a headache, don't do it".

-- AngularJS Issue #7636

Update

Note: replace: true is deprecated and not recommended to use, mainly due to the issues listed here. It has been completely removed in the new Angular.

Issues with replace: true

For more information, see

AngularJS $compile Service API Reference - Issues with replace:true

How can a file be copied?

open(destination, 'wb').write(open(source, 'rb').read())

Open the source file in read mode, and write to destination file in write mode.

How to make a HTML Page in A4 paper size page(s)?

A4 size is 210x297mm

So you can set the HTML page to fit those sizes with CSS:

html,body{
    height:297mm;
    width:210mm;
}

What are forward declarations in C++?

Why forward-declare is necessary in C++

The compiler wants to ensure you haven't made spelling mistakes or passed the wrong number of arguments to the function. So, it insists that it first sees a declaration of 'add' (or any other types, classes or functions) before it is used.

This really just allows the compiler to do a better job of validating the code, and allows it to tidy up loose ends so it can produce a neat looking object file. If you didn't have to forward declare things, the compiler would produce an object file that would have to contain information about all the possible guesses as to what the function 'add' might be. And the linker would have to contain very clever logic to try and work out which 'add' you actually intended to call, when the 'add' function may live in a different object file the linker is joining with the one that uses add to produce a dll or exe. It's possible that the linker may get the wrong add. Say you wanted to use int add(int a, float b), but accidentally forgot to write it, but the linker found an already existing int add(int a, int b) and thought that was the right one and used that instead. Your code would compile, but wouldn't be doing what you expected.

So, just to keep things explicit and avoid the guessing etc, the compiler insists you declare everything before it is used.

Difference between declaration and definition

As an aside, it's important to know the difference between a declaration and a definition. A declaration just gives enough code to show what something looks like, so for a function, this is the return type, calling convention, method name, arguments and their types. But the code for the method isn't required. For a definition, you need the declaration and then also the code for the function too.

How forward-declarations can significantly reduce build times

You can get the declaration of a function into your current .cpp or .h file by #includ'ing the header that already contains a declaration of the function. However, this can slow down your compile, especially if you #include a header into a .h instead of .cpp of your program, as everything that #includes the .h you're writing would end up #include'ing all the headers you wrote #includes for too. Suddenly, the compiler has #included pages and pages of code that it needs to compile even when you only wanted to use one or two functions. To avoid this, you can use a forward-declaration and just type the declaration of the function yourself at the top of the file. If you're only using a few functions, this can really make your compiles quicker compared to always #including the header. For really large projects, the difference could be an hour or more of compile time bought down to a few minutes.

Break cyclic references where two definitions both use each other

Additionally, forward-declarations can help you break cycles. This is where two functions both try to use each other. When this happens (and it is a perfectly valid thing to do), you may #include one header file, but that header file tries to #include the header file you're currently writing.... which then #includes the other header, which #includes the one you're writing. You're stuck in a chicken and egg situation with each header file trying to re #include the other. To solve this, you can forward-declare the parts you need in one of the files and leave the #include out of that file.

Eg:

File Car.h

#include "Wheel.h"  // Include Wheel's definition so it can be used in Car.
#include <vector>

class Car
{
    std::vector<Wheel> wheels;
};

File Wheel.h

Hmm... the declaration of Car is required here as Wheel has a pointer to a Car, but Car.h can't be included here as it would result in a compiler error. If Car.h was included, that would then try to include Wheel.h which would include Car.h which would include Wheel.h and this would go on forever, so instead the compiler raises an error. The solution is to forward declare Car instead:

class Car;     // forward declaration

class Wheel
{
    Car* car;
};

If class Wheel had methods which need to call methods of car, those methods could be defined in Wheel.cpp and Wheel.cpp is now able to include Car.h without causing a cycle.

Entity Framework Timeouts

There is a known bug with specifying default command timeout within the EF connection string.

http://bugs.mysql.com/bug.php?id=56806

Remove the value from the connection string and set it on the data context object itself. This will work if you remove the conflicting value from the connection string.

Entity Framework Core 1.0:

this.context.Database.SetCommandTimeout(180);

Entity Framework 6:

this.context.Database.CommandTimeout = 180;

Entity Framework 5:

((IObjectContextAdapter)this.context).ObjectContext.CommandTimeout = 180;

Entity Framework 4 and below:

this.context.CommandTimeout = 180;

Python object.repr(self) should be an expression?

"but does that mean it should just be an example of the sort of expression you could use, or should it be an actual expression, that can be executed (eval etc..) to recreate the object? Or... should it be just a rehasing of the actual expression which was used, for pure information purposes?"

Wow, that's a lot of hand-wringing.

An "an example of the sort of expression you could use" would not be a representation of a specific object. That can't be useful or meaningful.
What is the difference between "an actual expression, that can ... recreate the object" and "a rehasing of the actual expression which was used [to create the object]"? Both are an expression that creates the object. There's no practical distinction between these. A repr call could produce either a new expression or the original expression. In many cases, they're the same.

Note that this isn't always possible, practical or desirable.

In some cases, you'll notice that repr() presents a string which is clearly not an expression of any kind. The default repr() for any class you define isn't useful as an expression.

In some cases, you might have mutual (or circular) references between objects. The repr() of that tangled hierarchy can't make sense.

In many cases, an object is built incrementally via a parser. For example, from XML or JSON or something. What would the repr be? The original XML or JSON? Clearly not, since they're not Python. It could be some Python expression that generated the XML. However, for a gigantic XML document, it might not be possible to write a single Python expression that was the functional equivalent of parsing XML.

How to check for a valid URL in Java?

Judging by the source code for URI, the

public URL(URL context, String spec, URLStreamHandler handler)

constructor does more validation than the other constructors. You might try that one, but YMMV.

how to change default python version?

Do right thing, do thing right!

--->Zero Open your terminal,

--Firstly input python -V, It likely shows:

Python 2.7.10

-Secondly input python3 -V, It likely shows:

Python 3.7.2

--Thirdly input where python or which python, It likely shows:

/usr/bin/python

---Fourthly input where python3 or which python3, It likely shows:

/usr/local/bin/python3

--Fifthly add the following line at the bottom of your PATH environment variable file in ~/.profile file or ~/.bash_profile under Bash or ~/.zshrc under zsh.

alias python='/usr/local/bin/python3'

alias python=python3

-Sixthly input source ~/.bash_profile under Bash or source ~/.zshrc under zsh.

--Seventhly Quit the terminal.

---Eighthly Open your terminal, and input python -V, It likely shows:

Python 3.7.2

I had done successfully try it.

Others, the ~/.bash_profile under zsh is not that ~/.bash_profile.

The PATH environment variable under zsh instead ~/.profile (or ~/.bash_file) via ~/.zshrc.

Help you guys!

SQL Server Installation - What is the Installation Media Folder?

I ran into this just now with SQL Server 2014 SP1. The installer gave me the exact same problem and I followed suggestions from other answers to this question, but it got me nowhere.

In the end I figured out that I needed to download and install SQL Server 2014 first, and then apply SP1 to it. (doh)

Why can't I inherit static classes?

What you want to achieve by using class hierarchy can be achieved merely through namespacing. So languages that support namespapces ( like C#) will have no use of implementing class hierarchy of static classes. Since you can not instantiate any of the classes, all you need is a hierarchical organization of class definitions which you can obtain through the use of namespaces

How prevent CPU usage 100% because of worker process in iis

Well, this can take long time to figure out. Few points to narrow it down:

Identify what is killing the CPU. I recommend Process Explorer http://technet.microsoft.com/en-us/sysinternals/bb896653.aspx
Identify what AppPool is causing this
Fix your code

Align printf output in Java

Format specifications for printf and printf-like methods take an optional width parameter.

System.out.printf( "%10d. %25s $%25.2f\n",
                   i + 1, BOOK_TYPE[i], COST[i] );

Adjust widths to desired values.

Can we make unsigned byte in Java

Complete guide for working with unsigned bytes in Java:

Unsigned byte in Java

(Source for this answer.)

The Java Language does not provide anything like the unsigned keyword. A byte according to the language spec represents a value between -128 - 127. For instance, if a byte is cast to an int Java will interpret the first bit as the sign and use sign extension.

That being said, nothing prevents you from viewing a byte simply as 8 bits and interpret those bits as a value between 0 and 255. Just keep in mind that there's nothing you can do to force your interpretation upon someone else's method. If a method accepts a byte, then that method accepts a value between -128 and 127 unless explicitly stated otherwise.

Here are a couple of useful conversions / manipulations for your convenience:

Conversions to / from int

// From int to unsigned byte
int i = 200;                    // some value between 0 and 255
byte b = (byte) i;              // 8 bits representing that value

// From unsigned byte to int
byte b = 123;                   // 8 bits representing a value between 0 and 255
int i = b & 0xFF;               // an int representing the same value

(Or, if you're on Java 8+, use Byte.toUnsignedInt.)

Parsing / formatting

Best way is to use the above conversions:

// Parse an unsigned byte
byte b = (byte) Integer.parseInt("200");

// Print an unsigned byte
System.out.println("Value of my unsigned byte: " + (b & 0xFF));

Arithmetics

The 2-complement representation "just works" for addition, subtraction and multiplication:

// two unsigned bytes
byte b1 = (byte) 200;
byte b2 = (byte) 15;

byte sum  = (byte) (b1 + b2);  // 215
byte diff = (byte) (b1 - b2);  // 185
byte prod = (byte) (b2 * b2);  // 225

Division requires manual conversion of operands:

byte ratio = (byte) ((b1 & 0xFF) / (b2 & 0xFF));

Take multiple lists into dataframe

Adding to above answers, we can create on the fly

df= pd.DataFrame()
list1 = list(range(10))
list2 = list(range(10,20))
df['list1'] = list1
df['list2'] = list2
print(df)

hope it helps !

Encode a FileStream to base64 with c#

An easy one as an extension method

public static class Extensions
{
    public static Stream ConvertToBase64(this Stream stream)
    {
        byte[] bytes;
        using (var memoryStream = new MemoryStream())
        {
            stream.CopyTo(memoryStream);
            bytes = memoryStream.ToArray();
        }

        string base64 = Convert.ToBase64String(bytes);
        return new MemoryStream(Encoding.UTF8.GetBytes(base64));
    }
}

how to find array size in angularjs

You can find the number of members in a Javascript array by using its length property:

var number = $scope.names.length;

^{Docs - Array.prototype.length}

How to build x86 and/or x64 on Windows from command line with CMAKE?

This cannot be done with CMake. You have to generate two separate build folders. One for the x86 NMake build and one for the x64 NMake build. You cannot generate a single Visual Studio project covering both architectures with CMake, either.

To build Visual Studio projects from the command line for both 32-bit and 64-bit without starting a Visual Studio command prompt, use the regular Visual Studio generators.

For CMake 3.13 or newer, run the following commands:

cmake -G "Visual Studio 16 2019" -A Win32 -S \path_to_source\ -B "build32"
cmake -G "Visual Studio 16 2019" -A x64 -S \path_to_source\ -B "build64"
cmake --build build32 --config Release
cmake --build build64 --config Release

For earlier versions of CMake, run the following commands:

mkdir build32 & pushd build32
cmake -G "Visual Studio 15 2017" \path_to_source\
popd
mkdir build64 & pushd build64
cmake -G "Visual Studio 15 2017 Win64" \path_to_source\
popd
cmake --build build32 --config Release
cmake --build build64 --config Release

CMake generated projects that use one of the Visual Studio generators can be built from the command line with using the option --build followed by the build directory. The --config option specifies the build configuration.

What is the easiest way to parse an INI file in Java?

You could try JINIFile. Is a translation of the TIniFile from Delphi, but for java

https://github.com/SubZane/JIniFile

How to list the size of each file and directory and sort by descending size in Bash?

Another simple solution.

$ for entry in $(ls); do du -s "$entry"; done | sort -n

the result will look like

2900    tmp
6781    boot
8428    bin
24932   lib64
34436   sbin
90084   var
106676  etc
125216  lib
3313136 usr
4828700 opt

changing "du -s" to "du -sh" will show human readable size, but we won't be able to sort in this method.

C++ printing boolean, what is displayed?

The standard streams have a boolalpha flag that determines what gets displayed -- when it's false, they'll display as 0 and 1. When it's true, they'll display as false and true.

There's also an std::boolalpha manipulator to set the flag, so this:

#include <iostream>
#include <iomanip>

int main() {
    std::cout<<false<<"\n";
    std::cout << std::boolalpha;   
    std::cout<<false<<"\n";
    return 0;
}

...produces output like:

0
false

For what it's worth, the actual word produced when boolalpha is set to true is localized--that is, <locale> has a num_put category that handles numeric conversions, so if you imbue a stream with the right locale, it can/will print out true and false as they're represented in that locale. For example,

#include <iostream>
#include <iomanip>
#include <locale>

int main() {
    std::cout.imbue(std::locale("fr"));

    std::cout << false << "\n";
    std::cout << std::boolalpha;
    std::cout << false << "\n";
    return 0;
}

...and at least in theory (assuming your compiler/standard library accept "fr" as an identifier for "French") it might print out faux instead of false. I should add, however, that real support for this is uneven at best--even the Dinkumware/Microsoft library (usually quite good in this respect) prints false for every language I've checked.

The names that get used are defined in a numpunct facet though, so if you really want them to print out correctly for particular language, you can create a numpunct facet to do that. For example, one that (I believe) is at least reasonably accurate for French would look like this:

#include <array>
#include <string>
#include <locale>
#include <ios>
#include <iostream>

class my_fr : public std::numpunct< char > {
protected:
    char do_decimal_point() const { return ','; }
    char do_thousands_sep() const { return '.'; }
    std::string do_grouping() const { return "\3"; }
    std::string do_truename() const { return "vrai";  }
    std::string do_falsename() const { return "faux"; }
};

int main() {
    std::cout.imbue(std::locale(std::locale(), new my_fr));

    std::cout << false << "\n";
    std::cout << std::boolalpha;
    std::cout << false << "\n";
    return 0;
}

And the result is (as you'd probably expect):

0
faux

How to close IPython Notebook properly?

I am copy pasting from the Jupyter/IPython Notebook Quick Start Guide Documentation, released on Feb 13, 2018. http://jupyter-notebook-beginner-guide.readthedocs.io/en/latest/execute.html

1.3.3 Close a notebook: kernel shut down When a notebook is opened, its “computational engine” (called the kernel) is automatically started. Closing the notebook browser tab, will not shut down the kernel, instead the kernel will keep running until is explicitly shut down. To shut down a kernel, go to the associated notebook and click on menu File -> Close and Halt. Alternatively, the Notebook Dashboard has a tab named Running that shows all the running notebooks (i.e. kernels) and allows shutting them down (by clicking on a Shutdown button).

Summary: First close and halt the notebooks running.

1.3.2 Shut down the Jupyter Notebook App Closing the browser (or the tab) will not close the Jupyter Notebook App. To completely shut it down you need to close the associated terminal. In more detail, the Jupyter Notebook App is a server that appears in your browser at a default address (http://localhost:8888). Closing the browser will not shut down the server. You can reopen the previous address and the Jupyter Notebook App will be redisplayed. You can run many copies of the Jupyter Notebook App and they will show up at a similar address (only the number after “:”, which is the port, will increment for each new copy). Since with a single Jupyter Notebook App you can already open many notebooks, we do not recommend running multiple copies of Jupyter Notebook App.

Summary: Second, quit the terminal from which you fired Jupyter.

How do I send an HTML email?

Set content type. Look at this method.

message.setContent("<h1>Hello</h1>", "text/html");

Redirect in Spring MVC

Axtavt answer is correct.

This is how your resolver should look like (annotations based):

    @Bean
UrlBasedViewResolver resolver(){
    UrlBasedViewResolver resolver = new UrlBasedViewResolver();

    resolver.setPrefix("/views/");
    resolver.setSuffix(".jsp");
    resolver.setViewClass(JstlView.class);

    return resolver;
}

Obviously the name of your views directory should change based on your project.

Wrapping a react-router Link in an html button

`LinkButton` component - a solution for React Router v4

First, a note about many other answers to this question.

?? Nesting `<button>` and `<a>` is not valid html. ??

Any answer here which suggests nesting a html button in a React Router Link component (or vice-versa) will render in a web browser, but it is not semantic, accessible, or valid html:

<a stuff-here><button>label text</button></a>
<button><a stuff-here>label text</a></button>

?Click to validate this markup with validator.w3.org ?

This can lead to layout/styling issues as buttons are not typically placed inside links.

Using an html `<button>` tag with React Router `<Link>` component.

If you only want an html button tag…

<button>label text</button>

…then, here's the right way to get a button that works like React Router’s Link component…

Use React Router’s withRouter HOC to pass these props to your component:

history
location
match
staticContext

`LinkButton` component

Here’s a LinkButton component for you to copy/pasta:

// file: /components/LinkButton.jsx
import React from 'react'
import PropTypes from 'prop-types'
import { withRouter } from 'react-router'

const LinkButton = (props) => {
  const {
    history,
    location,
    match,
    staticContext,
    to,
    onClick,
    // ? filtering out props that `button` doesn’t know what to do with.
    ...rest
  } = props
  return (
    <button
      {...rest} // `children` is just another prop!
      onClick={(event) => {
        onClick && onClick(event)
        history.push(to)
      }}
    />
  )
}

LinkButton.propTypes = {
  to: PropTypes.string.isRequired,
  children: PropTypes.node.isRequired
}

export default withRouter(LinkButton)

Then import the component:

import LinkButton from '/components/LinkButton'

Use the component:

<LinkButton to='/path/to/page'>Push My Buttons!</LinkButton>

If you need an onClick method:

<LinkButton
  to='/path/to/page'
  onClick={(event) => {
    console.log('custom event here!', event)
  }}
>Push My Buttons!</LinkButton>

Update: If you're looking for another fun option made available after the above was written, check out this useRouter hook.

C++ - struct vs. class

The other difference is that

template<class T> ...

is allowed, but

template<struct T> ...

is not.

Difference between 'cls' and 'self' in Python classes?

Instead of accepting a self parameter, class methods take a cls parameter that points to the class—and not the object instance—when the method is called. Since the class method only has access to this cls argument, it can’t modify object instance state. That would require access to self . However, class methods can still modify class state that applies across all instances of the class.

-Python Tricks

Simple JavaScript problem: onClick confirm not preventing default action

<img src="images/delete.png" onclick="return confirm_delete('Are you sure?')"> 



<script type="text/javascript">
function confirm_delete(question) {

  if(confirm(question)){

     alert("Action to delete");

  }else{
    return false;  
  }

}
</script>

How can I tell AngularJS to "refresh"

Use

$route.reload();

remember to inject $route to your controller.

delete_all vs destroy_all?

To avoid the fact that destroy_all instantiates all the records and destroys them one at a time, you can use it directly from the model class.

So instead of :

u = User.find_by_name('JohnBoy')
u.usage_indexes.destroy_all

You can do :

u = User.find_by_name('JohnBoy')
UsageIndex.destroy_all "user_id = #{u.id}"

The result is one query to destroy all the associated records

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

I ran into this issue while opening the Service Fabric GettingStartedApplication in Visual Studio 2015. The original solution was built on .NET Core in VS 2017 and I got the same error when opening in 2015.

Here are the steps I followed to resolve the issue.

Right click on (load Failed) project and edit in visual studio.
Saw the following line in the Project tag: <Project Sdk="Microsoft.NET.Sdk.Web" >
Followed the instruction shown in the error message to add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to this tag

It should now look like:

<Project Sdk="Microsoft.NET.Sdk.Web" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">

Reloading the project gave me the next error (yours may be different based on what is included in your project)

Saw that None element had an update attribute as below:

<None Update="wwwroot\**\*;Views\**\*;Areas\**\Views">
  <CopyToPublishDirectory>PreserveNewest</CopyToPublishDirectory>
</None>

Commented that out as below.

<!--<None Update="wwwroot\**\*;Views\**\*;Areas\**\Views">
  <CopyToPublishDirectory>PreserveNewest</CopyToPublishDirectory>
</None>-->

Onto the next error: Version in Package Reference is unrecognized
Saw that Version is there in csproj xml as below (Additional PackageReference lines removed for brevity)

Stripped the Version attribute

<PackageReference Include="Microsoft.AspNetCore.Diagnostics" />
<PackageReference Include="Microsoft.AspNetCore.Mvc" />

I now get the following:

Bingo! The visual Studio One-way upgrade kicked in! Let VS do the magic!

The Project loaded but with reference lib errors.
Fixed the reference lib errors individually, by removing and replacing in NuGet to get the project working!

Hope this helps another code traveler :-D

How to check if a JavaScript variable is NOT undefined?

var lastname = "Hi";

if(typeof lastname !== "undefined")
{
  alert("Hi. Variable is defined.");
}

How to detect the device orientation using CSS media queries?

I think we need to write more specific media query. Make sure if you write one media query it should be not effect to other view (Mob,Tab,Desk) otherwise it can be trouble. I would like suggest to write one basic media query for respective device which cover both view and one orientation media query that you can specific code more about orientation view its for good practice. we Don't need to write both media orientation query at same time. You can refer My below example. I am sorry if my English writing is not much good. Ex:

For Mobile

@media screen and (max-width:767px) {

..This is basic media query for respective device.In to this media query  CSS code cover the both view landscape and portrait view.

}


@media screen and (min-width:320px) and (max-width:767px) and (orientation:landscape) {


..This orientation media query. In to this orientation media query you can specify more about CSS code for landscape view.

}

For Tablet

@media screen and (max-width:1024px){
..This is basic media query for respective device.In to this media query  CSS code cover the both view landscape and portrait view.
}
@media screen and (min-width:768px) and (max-width:1024px) and (orientation:landscape){

..This orientation media query. In to this orientation media query you can specify more about CSS code for landscape view.

}

Desktop

make as per your design requirement enjoy...(:

Thanks, Jitu

Twitter API returns error 215, Bad Authentication Data

I'm using HybridAuth and was running into this error connecting to Twitter. I tracked it down to (me) sending Twitter an incorrectly cased request type (get/post instead of GET/POST).

This would cause a 215:

$call = '/search/tweets.json';
$call_type = 'get';
$call_args = array(
    'q'           => 'pancakes',
    'count'       => 5,
);
$response = $provider_api->api( $call, $call_type, $call_args );

This would not:

$call = '/search/tweets.json';
$call_type = 'GET';
$call_args = array(
    'q'           => 'pancakes',
    'count'       => 5,
);
$response = $provider_api->api( $call, $call_type, $call_args );

Side note: In the case of HybridAuth the following also would not (because HA internally provides the correctly-cased value for the request type):

$call = '/search/tweets.json';
$call_args = array(
    'q'           => 'pancakes',
    'count'       => 5,
);
$response = $providers['Twitter']->get( $call, $call_args );

Regular vs Context Free Grammars

Regular grammar:- grammar containing production as follows is RG:

V->TV or VT
V->T

where V=variable and T=terminal

RG may be Left Linear Grammar or Right Liner Grammar, but not Middle linear Grammar.

As we know all RG are Linear Grammar but only Left Linear or Right Linear Grammar are RG.

A regular grammar can be ambiguous.

S->aA|aB
A->a
B->a

Ambiguous Grammar:- for a string x their exist more than one LMD or More than RMD or More than one Parse tree or One LMD and One RMD but both Produce different Parse tree.

                S                   S

              /   \               /   \
             a     A             a     B
                    \                   \
                     a                   a

this Grammar is ambiguous Grammar because two parse tree.

CFG:- A grammar said to be CFG if its Production is in form:

   V->@   where @ belongs to (V+T)*

DCFL:- as we know all DCFL are LL(1) Grammar and all LL(1) is LR(1) so it is Never be ambiguous. so DCFG is Never be ambiguous.

We also know all RL are DCFL so RL never be ambiguous. Note that RG may be ambiguous but RL not.

CFL: CFl May or may not ambiguous.

Note: RL never be Inherently ambiguous.

Android: remove notification from notification bar

A short one Liner of this is:

NotificationManagerCompat.from(context).cancel(NOTIFICATION_ID)

Or to cancel all notifications is:

NotificationManagerCompat.from(context).cancelAll()

Made for AndroidX or Support Libraries.

Mongoimport of json file

this will work:

$  mongoimport --db databaseName --collection collectionName --file filePath/jsonFile.json 


2021-01-09T11:13:57.410+0530    connected to: mongodb://localhost/
2021-01-09T11:13:58.176+0530    1 document(s) imported successfully. 0 document(s) failed to import.

Above I shared the query along with its response

HTML anchor tag with Javascript onclick event

Use following code to show menu instead go to href addres

_x000D_

function show_more_menu(e) {_x000D_
  if( !confirm(`Go to ${e.target.href} ?`) ) e.preventDefault();_x000D_
}

_x000D_

<a href='more.php' onclick="show_more_menu(event)"> More >>> </a>

_x000D_

Room - Schema export directory is not provided to the annotation processor so we cannot export the schema

If like me you recently moved certain classes to different packages ect. and you use android navigation. Make sure to change the argType to you match you new package address. from:

app:argType="com.example.app.old.Item"

to:

app:argType="com.example.app.new.Item"

Android Color Picker

If you want a fragment solution, I have made a fork of android-color-picker where DialogFragment is used and is re-created on configuration change. Here's the link: https://github.com/lomza/android-color-picker

how to get last insert id after insert query in codeigniter active record

**Inside Model**
function add_info($data){
   $this->db->insert('tbl_user_info',$data);
   $last_id = $this->db->insert_id();
   return  $last_id;
}

**Inside Controller**
public function save_user_record() {
  $insertId =  $this->welcome_model->save_user_info($data);
  echo $insertId->id;
}

Differences between arm64 and aarch64

AArch64 is the 64-bit state introduced in the Armv8-A architecture (https://en.wikipedia.org/wiki/ARM_architecture#ARMv8-A). The 32-bit state which is backwards compatible with Armv7-A and previous 32-bit Arm architectures is referred to as AArch32. Therefore the GNU triplet for the 64-bit ISA is aarch64. The Linux kernel community chose to call their port of the kernel to this architecture arm64 rather than aarch64, so that's where some of the arm64 usage comes from.

As far as I know the Apple backend for aarch64 was called arm64 whereas the LLVM community-developed backend was called aarch64 (as it is the canonical name for the 64-bit ISA) and later the two were merged and the backend now is called aarch64.

So AArch64 and ARM64 refer to the same thing.

git rebase merge conflict

Rebasing can be a real headache. You have to resolve the merge conflicts and continue rebasing. For example you can use the merge tool (which differs depending on your settings)

git mergetool

Then add your changes and go on

git rebase --continue

Good luck

boolean in an if statement

I think that your reasoning is sound. But in practice I have found that it is far more common to omit the === comparison. I think that there are three reasons for that:

It does not usually add to the meaning of the expression - that's in cases where the value is known to be boolean anyway.
Because there is a great deal of type-uncertainty in JavaScript, forcing a type check tends to bite you when you get an unexpected undefined or null value. Often you just want your test to fail in such cases. (Though I try to balance this view with the "fail fast" motto).
JavaScript programmers like to play fast-and-loose with types - especially in boolean expressions - because we can.

Consider this example:

var someString = getInput();
var normalized = someString && trim(someString);  
// trim() removes leading and trailing whitespace

if (normalized) {
    submitInput(normalized);
}

I think that this kind of code is not uncommon. It handles cases where getInput() returns undefined, null, or an empty string. Due to the two boolean evaluations submitInput() is only called if the given input is a string that contains non-whitespace characters.

In JavaScript && returns its first argument if it is falsy or its second argument if the first argument is truthy; so normalized will be undefined if someString was undefined and so forth. That means that none of the inputs to the boolean expressions above are actually boolean values.

I know that a lot of programmers who are accustomed to strong type-checking cringe when seeing code like this. But note applying strong typing would likely require explicit checks for null or undefined values, which would clutter up the code. In JavaScript that is not needed.

When should I use a struct rather than a class in C#?

Use a struct when you want value semantics as opposed to reference semantics.

Edit

Not sure why folks are downvoting this but this is a valid point, and was made before the op clarified his question, and it is the most fundamental basic reason for a struct.

If you need reference semantics you need a class not a struct.

Laravel Controller Subfolder routing

1.create your subfolder just like followings:

app
----controllers
--------admin
--------home

2.configure your code in app/routes.php

<?php
// index
Route::get('/', 'Home\HomeController@index');

// admin/test
Route::group(
    array('prefix' => 'admin'), 
    function() {
        Route::get('test', 'Admin\IndexController@index');
    }
);
?>

3.write sth in app/controllers/admin/IndexController.php, eg:

<?php
namespace Admin;

class IndexController extends \BaseController {

    public function index()
    {
        return "admin.home";
    }
}
?>

4.access your site,eg:localhost/admin/test you'll see "admin.home" on the page

ps: Please ignore my poor English

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

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

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

But the method takes a vector<Card>&:

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

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

Error:

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

Paraphrased:

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

Error:

[Note] candidate is:

In file included from main.cpp

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

Paraphrased:

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

Error:

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

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

Multiple contexts with the same path error running web service in Eclipse using Tomcat

Go to server.xml and Search for "Context" tag with a property name "docBase".

Remove the duplicate lines here. Then try to restart the server.

How to run a .awk file?

The file you give is a shell script, not an awk program. So, try sh my.awk.

If you want to use awk -f my.awk life.csv > life_out.cs, then remove awk -F , ' and the last line from the file and add FS="," in BEGIN.

Using SELECT result in another SELECT

You are missing table NewScores, so it can't be found. Just join this table.

If you really want to avoid joining it directly you can replace NewScores.NetScore with SELECT NetScore FROM NewScores WHERE {conditions on which they should be matched}

How to use regex in String.contains() method in Java

public static void main(String[] args) {
    String test = "something hear - to - find some to or tows";
    System.out.println("1.result: " + contains("- to -( \\w+) som", test, null));
    System.out.println("2.result: " + contains("- to -( \\w+) som", test, 5));
}
static boolean contains(String pattern, String text, Integer fromIndex){
    if(fromIndex != null && fromIndex < text.length())
        return Pattern.compile(pattern).matcher(text).find();

    return Pattern.compile(pattern).matcher(text).find();
}

1.result: true

2.result: true

Rebasing remote branches in Git

You can disable the check (if you're really sure you know what you're doing) by using the --force option to git push.

How to "flatten" a multi-dimensional array to simple one in PHP?

function flatten_array($array, $preserve_keys = 0, &$out = array()) {
    # Flatten a multidimensional array to one dimension, optionally preserving keys.
    #
    # $array - the array to flatten
    # $preserve_keys - 0 (default) to not preserve keys, 1 to preserve string keys only, 2 to preserve all keys
    # $out - internal use argument for recursion
    foreach($array as $key => $child)
        if(is_array($child))
            $out = flatten_array($child, $preserve_keys, $out);
        elseif($preserve_keys + is_string($key) > 1)
            $out[$key] = $child;
        else
            $out[] = $child;
    return $out;
}

Convert a double to a QString

Building on @Kristian's answer, I had a desire to display a fixed number of decimal places. That can be accomplished with other arguments in the QString::number(...) function. For instance, I wanted 3 decimal places:

double value = 34.0495834;
QString strValue = QString::number(value, 'f', 3);
// strValue == "34.050"

The 'f' specifies decimal format notation (more info here, you can also specify scientific notation) and the 3 specifies the precision (number of decimal places). Probably already linked in other answers, but more info about the QString::number function can be found here in the QString documentation

Create tap-able "links" in the NSAttributedString of a UILabel?

Translating @samwize's Extension to Swift 4:

extension UITapGestureRecognizer {
    func didTapAttributedTextInLabel(label: UILabel, inRange targetRange: NSRange) -> Bool {
        guard let attrString = label.attributedText else {
            return false
        }

        let layoutManager = NSLayoutManager()
        let textContainer = NSTextContainer(size: .zero)
        let textStorage = NSTextStorage(attributedString: attrString)

        layoutManager.addTextContainer(textContainer)
        textStorage.addLayoutManager(layoutManager)

        textContainer.lineFragmentPadding = 0
        textContainer.lineBreakMode = label.lineBreakMode
        textContainer.maximumNumberOfLines = label.numberOfLines
        let labelSize = label.bounds.size
        textContainer.size = labelSize

        let locationOfTouchInLabel = self.location(in: label)
        let textBoundingBox = layoutManager.usedRect(for: textContainer)
        let textContainerOffset = CGPoint(x: (labelSize.width - textBoundingBox.size.width) * 0.5 - textBoundingBox.origin.x, y: (labelSize.height - textBoundingBox.size.height) * 0.5 - textBoundingBox.origin.y)
        let locationOfTouchInTextContainer = CGPoint(x: locationOfTouchInLabel.x - textContainerOffset.x, y: locationOfTouchInLabel.y - textContainerOffset.y)
        let indexOfCharacter = layoutManager.characterIndex(for: locationOfTouchInTextContainer, in: textContainer, fractionOfDistanceBetweenInsertionPoints: nil)
        return NSLocationInRange(indexOfCharacter, targetRange)
    }
}

To set up the recognizer (once you colored the text and stuff):

lblTermsOfUse.isUserInteractionEnabled = true
lblTermsOfUse.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(handleTapOnLabel(_:))))

...then the gesture recognizer:

@objc func handleTapOnLabel(_ recognizer: UITapGestureRecognizer) {
    guard let text = lblAgreeToTerms.attributedText?.string else {
        return
    }

    if let range = text.range(of: NSLocalizedString("_onboarding_terms", comment: "terms")),
        recognizer.didTapAttributedTextInLabel(label: lblAgreeToTerms, inRange: NSRange(range, in: text)) {
        goToTermsAndConditions()
    } else if let range = text.range(of: NSLocalizedString("_onboarding_privacy", comment: "privacy")),
        recognizer.didTapAttributedTextInLabel(label: lblAgreeToTerms, inRange: NSRange(range, in: text)) {
        goToPrivacyPolicy()
    }
}

Dynamically add script tag with src that may include document.write

a nice little script I wrote to load multiple scripts:

function scriptLoader(scripts, callback) {

    var count = scripts.length;

    function urlCallback(url) {
        return function () {
            console.log(url + ' was loaded (' + --count + ' more scripts remaining).');
            if (count < 1) {
                callback();
            }
        };
    }

    function loadScript(url) {
        var s = document.createElement('script');
        s.setAttribute('src', url);
        s.onload = urlCallback(url);
        document.head.appendChild(s);
    }

    for (var script of scripts) {
        loadScript(script);
    }
};

usage:

scriptLoader(['a.js','b.js'], function() {
    // use code from a.js or b.js
});

EXCEL VBA, inserting blank row and shifting cells

Sub Addrisk()

Dim rActive As Range
Dim Count_Id_Column as long

Set rActive = ActiveCell

Application.ScreenUpdating = False

with thisworkbook.sheets(1) 'change to "sheetname" or sheetindex
    for i = 1 to .range("A1045783").end(xlup).row
        if 'something'  = 'something' then
            .range("A" & i).EntireRow.Copy 'add thisworkbook.sheets(index_of_sheet) if you copy from another sheet
            .range("A" & i).entirerow.insert shift:= xldown 'insert and shift down, can also use xlup
            .range("A" & i + 1).EntireRow.paste 'paste is all, all other defs are less.
            'change I to move on to next row (will get + 1 end of iteration)
            i = i + 1
        end if

            On Error Resume Next
                .SpecialCells(xlCellTypeConstants).ClearContents
            On Error GoTo 0

        End With
    next i
End With

Application.CutCopyMode = False
Application.ScreenUpdating = True 're-enable screen updates

End Sub

http://localhost/ not working on Windows 7. What's the problem?

I had the exact same issue, and the solution is what someone has already said:

In the taskbar, click on the WAMP icon.

Go to Apache-->Service-->Install Service

Then go back by clicking and selecting Apache-->Service-->Start/Resume Service

This will allow the localhost function to work (keep in mind I had already changed the host file located under c:\windows\system32\drivers\etc to remove the # from the 127.0.0.1 line)

If you need to edit that file still, you need to right click on it and select Properties. Then go to the Security tab, and click the Advanced button. You then need to select the Users, click Edit and select "Full Control". This will enable you to edit it.

That being said, you need to ALSO install the MySQL service following the same procedure.

MySQL-->Service-->Install Service

Then go back by right clicking yet again and selecting MySQL-->Service-->Start/Resume Service.

And that should fix it all up in Windows 7!

How do you use script variables in psql?

I solved it with a temp table.

CREATE TEMP TABLE temp_session_variables (
    "sessionSalt" TEXT
);
INSERT INTO temp_session_variables ("sessionSalt") VALUES (current_timestamp || RANDOM()::TEXT);

This way, I had a "variable" I could use over multiple queries, that is unique for the session. I needed it to generate unique "usernames" while still not having collisions if importing users with the same user name.

Delete all rows in an HTML table

this would work iteration deletetion in HTML table in native

document.querySelectorAll("table tbody tr").forEach(function(e){e.remove()})

How to get the unix timestamp in C#

There is a ToUnixTimeMilliseconds for DateTimeOffset in System

You can write similar method for DateTime:

public static long ToUnixTimeSeconds(this DateTime value)
{
    return value.Ticks / 10000000L - 62135596800L;
}

10000000L - converting ticks to seconds

62135596800L - converting 01.01.01 to 01.01.1978

There is no problem with Utc and leaks

Mongoose: findOneAndUpdate doesn't return updated document

For anyone using the Node.js driver instead of Mongoose, you'll want to use {returnOriginal:false} instead of {new:true}.

Get program path in VB.NET?

If the path is a drive, a slash will also appear in the path, and this time the use will cause problems. To unify, the best solution is the following command.

        Dim FileName As String = "MyFileName"
    Dim MyPath1 As String = Application.StartupPath().TrimEnd("\") & "\" & FileName
    Dim MyPath2 As String = My.Application.Info.DirectoryPath.TrimEnd("\") & "\" & FileName

JavaFX and OpenJDK

Try obuildfactory.

There is need to modify these scripts (contains error and don't exactly do the "thing" required), i will upload mine scripts forked from obuildfactory in next few days. and so i will also update my answer accordingly.

Until then enjoy, sir :)

How to position three divs in html horizontally?

Get rid of the position:relative; and replace it with float:left; and float:right;.

Example in jsfiddle: http://jsfiddle.net/d9fHP/1/

        <html>
<title>
Website Title </title>
<div id="the whole thing" style="float:left; height:100%; width:100%">
    <div id="leftThing" style="float:left; width:25%; background-color:blue;">
         Left Side Menu
    </div>
    <div id="content" style="float:left; width:50%; background-color:green;">
         Random Content
    </div>
    <div id="rightThing" style="float:right; width:25%; background-color:yellow;">
         Right Side Menu
    </div>
</div>
</html>?

How do you create nested dict in Python?

If you want to create a nested dictionary given a list (arbitrary length) for a path and perform a function on an item that may exist at the end of the path, this handy little recursive function is quite helpful:

def ensure_path(data, path, default=None, default_func=lambda x: x):
    """
    Function:

    - Ensures a path exists within a nested dictionary

    Requires:

    - `data`:
        - Type: dict
        - What: A dictionary to check if the path exists
    - `path`:
        - Type: list of strs
        - What: The path to check

    Optional:

    - `default`:
        - Type: any
        - What: The default item to add to a path that does not yet exist
        - Default: None

    - `default_func`:
        - Type: function
        - What: A single input function that takes in the current path item (or default) and adjusts it
        - Default: `lambda x: x` # Returns the value in the dict or the default value if none was present
    """
    if len(path)>1:
        if path[0] not in data:
            data[path[0]]={}
        data[path[0]]=ensure_path(data=data[path[0]], path=path[1:], default=default, default_func=default_func)
    else:
        if path[0] not in data:
            data[path[0]]=default
        data[path[0]]=default_func(data[path[0]])
    return data

Example:

data={'a':{'b':1}}
ensure_path(data=data, path=['a','c'], default=[1])
print(data) #=> {'a':{'b':1, 'c':[1]}}
ensure_path(data=data, path=['a','c'], default=[1], default_func=lambda x:x+[2])
print(data) #=> {'a': {'b': 1, 'c': [1, 2]}}

ASP.NET page life cycle explanation

This acronym might help you to remember the ASP.NET life cycle stages which I wrote about in the below blog post.

R-SIL-VP-RU

Request

Start

Initialization

Load

Validation

Post back handling

Rendering

Unload

From my blog: Understand ASP.NET Page life cycle and remember stages in easy way
18 May 2014

Sum values from multiple rows using vlookup or index/match functions

You should use Ctrl+shift+enter when using the =SUM(VLOOKUP(A9,A1:D5,{2,3,4,},FALSE)) that results in {=SUM(VLOOKUP(A9,A1:D5,{2,3,4,},FALSE))} en also works.

How to set null to a GUID property

I think this is the correct way:

Guid filed = Guid.Empty;

fatal: Not a valid object name: 'master'

When I git init a folder it doesn't create a master branch

This is true, and expected behaviour. Git will not create a master branch until you commit something.

When I do git --bare init it creates the files.

A non-bare git init will also create the same files, in a hidden .git directory in the root of your project.

When I type git branch master it says "fatal: Not a valid object name: 'master'"

That is again correct behaviour. Until you commit, there is no master branch.

You haven't asked a question, but I'll answer the question I assumed you mean to ask. Add one or more files to your directory, and git add them to prepare a commit. Then git commit to create your initial commit and master branch.

Vertically align an image inside a div with responsive height

Try

Html

<div class="responsive-container">
     <div class="img-container">
         <IMG HERE>
     </div>
</div>

CSS

.img-container {
    position: absolute;
    top: 0;
    left: 0;
height:0;
padding-bottom:100%;
}
.img-container img {
width:100%;
}

Get the string within brackets in Python

your_string = "lnfgbdgfi343456dsfidf[my data] ljfbgns47647jfbgfjbgskj"
your_string[your_string.find("[")+1 : your_string.find("]")]

courtesy: Regular expression to return text between parenthesis

iPhone X / 8 / 8 Plus CSS media queries

I noticed that the answers here are using: device-width, device-height, min-device-width, min-device-height, max-device-width, max-device-height.

Please refrain from using them since they are deprecated. see MDN for reference. Instead use the regular min-width, max-width and so on. For extra assurance, you can set the min and max to the same px amount. For example:

iPhone X

@media only screen 
    and (width : 375px) 
    and (height : 635px)
    and (orientation : portrait)  
    and (-webkit-device-pixel-ratio : 3) { }

You may also notice that I am using 635px for height. Try it yourself the window height is actually 635px. run iOS simulator for iPhone X and in Safari Web inspector do window.innerHeight. Here are a few useful links on this subject:

android get real path by Uri.getPath()

This helped me to get uri from Gallery and convert to a file for Multipart upload

File file = FileUtils.getFile(this, fileUri);

https://github.com/iPaulPro/aFileChooser/blob/master/aFileChooser/src/com/ipaulpro/afilechooser/utils/FileUtils.java

PRINT statement in T-SQL

The Print statement in TSQL is a misunderstood creature, probably because of its name. It actually sends a message to the error/message-handling mechanism that then transfers it to the calling application. PRINT is pretty dumb. You can only send 8000 characters (4000 unicode chars). You can send a literal string, a string variable (varchar or char) or a string expression. If you use RAISERROR, then you are limited to a string of just 2,044 characters. However, it is much easier to use it to send information to the calling application since it calls a formatting function similar to the old printf in the standard C library. RAISERROR can also specify an error number, a severity, and a state code in addition to the text message, and it can also be used to return user-defined messages created using the sp_addmessage system stored procedure. You can also force the messages to be logged.

Your error-handling routines won’t be any good for receiving messages, despite messages and errors being so similar. The technique varies, of course, according to the actual way you connect to the database (OLBC, OLEDB etc). In order to receive and deal with messages from the SQL Server Database Engine, when you’re using System.Data.SQLClient, you’ll need to create a SqlInfoMessageEventHandler delegate, identifying the method that handles the event, to listen for the InfoMessage event on the SqlConnection class. You’ll find that message-context information such as severity and state are passed as arguments to the callback, because from the system perspective, these messages are just like errors.

It is always a good idea to have a way of getting these messages in your application, even if you are just spooling to a file, because there is always going to be a use for them when you are trying to chase a really obscure problem. However, I can’t think I’d want the end users to ever see them unless you can reserve an informational level that displays stuff in the application.

How to fix the session_register() deprecated issue?

Don't use it. The description says:

Register one or more global variables with the current session.

Two things that came to my mind:

Using global variables is not good anyway, find a way to avoid them.
You can still set variables with $_SESSION['var'] = "value".

jquery datatables hide column

var example = $('#exampleTable').DataTable({
    "columnDefs": [
        {
            "targets": [0],
            "visible": false,
            "searchable": false
        }
    ]
});

Target attribute defines the position of the column.Visible attribute responsible for visibility of the column.Searchable attribute responsible for searching facility.If it set to false that column doesn't function with searching.

How to compile c# in Microsoft's new Visual Studio Code?

Since no one else said it, the short-cut to compile (build) a C# app in Visual Studio Code (VSCode) is SHIFT+CTRL+B.

If you want to see the build errors (because they don't pop-up by default), the shortcut is SHIFT+CTRL+M.

(I know this question was asking for more than just the build shortcut. But I wanted to answer the question in the title, which wasn't directly answered by other answers/comments.)

RS256 vs HS256: What's the difference?

In cryptography there are two types of algorithms used:

Symmetric algorithms

A single key is used to encrypt data. When encrypted with the key, the data can be decrypted using the same key. If, for example, Mary encrypts a message using the key "my-secret" and sends it to John, he will be able to decrypt the message correctly with the same key "my-secret".

Asymmetric algorithms

Two keys are used to encrypt and decrypt messages. While one key(public) is used to encrypt the message, the other key(private) can only be used to decrypt it. So, John can generate both public and private keys, then send only the public key to Mary to encrypt her message. The message can only be decrypted using the private key.

HS256 and RS256 Scenario

These algorithms are NOT used to encrypt/decryt data. Rather they are used to verify the origin or the authenticity of the data. When Mary needs to send an open message to Jhon and he needs to verify that the message is surely from Mary, HS256 or RS256 can be used.

HS256 can create a signature for a given sample of data using a single key. When the message is transmitted along with the signature, the receiving party can use the same key to verify that the signature matches the message.

RS256 uses pair of keys to do the same. A signature can only be generated using the private key. And the public key has to be used to verify the signature. In this scenario, even if Jack finds the public key, he cannot create a spoof message with a signature to impersonate Mary.

Programs & Examples On #Maskedinput

Phone mask with jQuery and Masked Input Plugin

Avoid Adding duplicate elements to a List C#

SQL Server database backup restore on lower version

Two statements next to curly brace in an equation

Dynamically Fill Jenkins Choice Parameter With Git Branches In a Specified Repo

Pass a datetime from javascript to c# (Controller)

javascript remove "disabled" attribute from html input

Java for loop syntax: "for (T obj : objects)"

Git add all files modified, deleted, and untracked?

How to use enums as flags in C++?

Get value when selected ng-option changes

How to install Intellij IDEA on Ubuntu?

Display Records From MySQL Database using JTable in Java

Best way to do nested case statement logic in SQL Server

How to get the selected row values of DevExpress XtraGrid?

Clicking the back button twice to exit an activity

How do I calculate percentiles with python/numpy?

How can I disable a button on a jQuery UI dialog?

'readline/readline.h' file not found

No 'Access-Control-Allow-Origin' - Node / Apache Port Issue

iOS9 Untrusted Enterprise Developer with no option to trust

SQL to generate a list of numbers from 1 to 100

What is console.log?

CSV with comma or semicolon?

How to assert greater than using JUnit Assert?

How to find unused/dead code in java projects

ValueError: max() arg is an empty sequence

How can I get the latest JRE / JDK as a zip file rather than EXE or MSI installer?

Remove stubborn underline from link

Passing a URL with brackets to curl

iPhone UITextField - Change placeholder text color

What to do with commit made in a detached head

Python error "ImportError: No module named"

how to get the child node in div using javascript

What is the relative performance difference of if/else versus switch statement in Java?

How to write a Python module/package?

How to manually update datatables table with new JSON data

Datatables warning(table id = 'example'): cannot reinitialise data table

In Angular, What is 'pathmatch: full' and what effect does it have?

Can the Android drawable directory contain subdirectories?

Is it good practice to make the constructor throw an exception?

Page Redirect after X seconds wait using JavaScript

Display an image with Python

pandas how to check dtype for all columns in a dataframe?

java create date object using a value string

How to insert Records in Database using C# language?

Automatically open Chrome developer tools when new tab/new window is opened

flutter run: No connected devices

Update style of a component onScroll in React.js

failed to lazily initialize a collection of role

git remote prune – didn't show as many pruned branches as I expected

Limiting number of displayed results when using ngRepeat

How do you add a JToken to an JObject?

Npm Please try using this command again as root/administrator

Find nearest latitude/longitude with an SQL query

Playing MP4 files in Firefox using HTML5 video

Changing the JFrame title

How to set shape's opacity?

"relocation R_X86_64_32S against " linking Error

Getting parts of a URL (Regex)

What is ":-!!" in C code?

Join String list elements with a delimiter in one step

Excel 2010 VBA Referencing Specific Cells in other worksheets

How to edit CSS style of a div using C# in .NET

Reloading .env variables without restarting server (Laravel 5, shared hosting)

Server Client send/receive simple text

Date Conversion from String to sql Date in Java giving different output?

SQL Query to concatenate column values from multiple rows in Oracle

How to flush route table in windows?

What is the '.well' equivalent class in Bootstrap 4

Mixed mode assembly is built against version ‘v2.0.50727' of the runtime

Adjusting and image Size to fit a div (bootstrap)

sorting integers in order lowest to highest java

What is difference between png8 and png24

How do I detect whether 32-bit Java is installed on x64 Windows, only looking at the filesystem and registry?

Is there any JSON Web Token (JWT) example in C#?

javascript function wait until another function to finish

Set auto height and width in CSS/HTML for different screen sizes

Entity Framework 6 GUID as primary key: Cannot insert the value NULL into column 'Id', table 'FileStore'; column does not allow nulls

Spaces encoded as `%20` vs. `+`

`replace:true` is Deprecated

Python object.repr(self) should be an expression?