Programs & Examples On #Audiosessionservices

How to cancel a local git commit

Just use git reset without the --hard flag:

git reset HEAD~1

PS: On Unix based systems you can use HEAD^ which is equal to HEAD~1. On Windows HEAD^ will not work because ^ signals a line continuation. So your command prompt will just ask you More?.

Questions every good Database/SQL developer should be able to answer

Why should we hire you when we have a sophisticated application using a properly-optimized ORM and implementing caching systems such as memcached?

This is a serious question, they should be able to justify their existence. As Jeff Atwood likes to say "Hardware is Cheap, Programmers are Expensive"

Printing pointers in C

Yes, your compiler is expecting void *. Just cast them to void *.

/* for instance... */
printf("The value of s is: %p\n", (void *) s);
printf("The direction of s is: %p\n", (void *) &s);

DateTime's representation in milliseconds?

As of .NET 4.6, you can use a DateTimeOffset object to get the unix milliseconds. It has a constructor which takes a DateTime object, so you can just pass in your object as demonstrated below.

DateTime yourDateTime;
long yourDateTimeMilliseconds = new DateTimeOffset(yourDateTime).ToUnixTimeMilliseconds();

As noted in other answers, make sure yourDateTime has the correct Kind specified, or use .ToUniversalTime() to convert it to UTC time first.

Here you can learn more about DateTimeOffset.

Multiple maven repositories in one gradle file

you have to do like this in your project level gradle file

allprojects {
    repositories {
        jcenter()
        maven { url "http://dl.appnext.com/" }
        maven { url "https://maven.google.com" }
    }
}

The I/O operation has been aborted because of either a thread exit or an application request

What I do when it happens is Disable the COM port into the Device Manager and Enable it again.

It stop the communications with another program or thread and become free for you.

I hope this works for you. Regards.

Check if decimal value is null

A decimal will always have some default value. If you need to have a nullable type decimal, you can use decimal?. Then you can do myDecimal.HasValue

What are POD types in C++?

As I understand POD (PlainOldData) is just a raw data - it does not need:

  • to be constructed,
  • to be destroyed,
  • to have custom operators.
  • Must not have virtual functions,
  • and must not override operators.

How to check if something is a POD? Well, there is a struct for that called std::is_pod:

namespace std {
// Could use is_standard_layout && is_trivial instead of the builtin.
template<typename _Tp>
  struct is_pod
  : public integral_constant<bool, __is_pod(_Tp)>
  { };
}

(From header type_traits)


Reference:

import httplib ImportError: No module named httplib

You are running Python 2 code on Python 3. In Python 3, the module has been renamed to http.client.

You could try to run the 2to3 tool on your code, and try to have it translated automatically. References to httplib will automatically be rewritten to use http.client instead.

How to add a column in TSQL after a specific column?

If you are using the GUI to do this you must deselect the following option allowing the table to be dropped,

enter image description here

Execute specified function every X seconds

Use System.Windows.Forms.Timer.

private Timer timer1; 
public void InitTimer()
{
    timer1 = new Timer();
    timer1.Tick += new EventHandler(timer1_Tick);
    timer1.Interval = 2000; // in miliseconds
    timer1.Start();
}

private void timer1_Tick(object sender, EventArgs e)
{
    isonline();
}

You can call InitTimer() in Form1_Load().

Using GCC to produce readable assembly?

godbolt is a very useful tool, they list only has C++ compilers but you can use -x c flag in order to get it treat the code as C. It will then generate an assembly listing for your code side by side and you can use the Colourise option to generate colored bars to visually indicate which source code maps to the generated assembly. For example the following code:

#include <stdio.h>

void func()
{
  printf( "hello world\n" ) ;
}

using the following command line:

-x c -std=c99 -O3

and Colourise would generate the following:

enter image description here

IIS7 - The request filtering module is configured to deny a request that exceeds the request content length

I had similar issue, I resolved by changing the requestlimits maxAllowedContentLength ="40000000" section of applicationhost.config file, located in "C:\Windows\System32\inetsrv\config" directory

Look for security Section and add the sectionGroup.

<sectionGroup name="requestfiltering">
    <section name="requestlimits" maxAllowedContentLength ="40000000" />
</sectionGroup>

*NOTE delete;

<section name="requestfiltering" overrideModeDefault="Deny" />

Intellij idea subversion checkout error: `Cannot run program "svn"`

Under settings ->verison control -> Subversion, uncheck use command line client. It will work.

Hide div element when screen size is smaller than a specific size

This should help:

if(screen.width<1026){//get the screen width
   //get element form document
   elem.style.display == 'none'//toggle visibility
}

768 px should be enough as well

C# find biggest number

There is the Linq Max() extension method. It's available for all common number types(int, double, ...). And since it works on any class that implements IEnumerable<T> it works on all common containers such as arrays T[], List<T>,...

To use it you need to have using System.Linq in the beginning of your C# file, and need to reference the System.Core assembly. Both are done by default on new projects(C# 3 or later)

int[] numbers=new int[]{1,3,2};
int maximumNumber=numbers.Max();

You can also use Math.Max(a,b) which works only on two numbers. Or write a method yourself. That's not hard either.

How to find server name of SQL Server Management Studio

simply type .\sqlexpress as the Server Name

Accessing Arrays inside Arrays In PHP

If $a is the array that's passed, $a[76][0]['id'] should give '76' and $a[76][1]['id'] should give '81', but I can't test as I don't have PHP installed on this machine.

How can I check the system version of Android?

Build.Version is the place go to for this data. Here is a code snippet for how to format it.

public String getAndroidVersion() {
    String release = Build.VERSION.RELEASE;
    int sdkVersion = Build.VERSION.SDK_INT;
    return "Android SDK: " + sdkVersion + " (" + release +")";
}

Looks like this "Android SDK: 19 (4.4.4)"

Bash tool to get nth line from a file

I have a unique situation where I can benchmark the solutions proposed on this page, and so I'm writing this answer as a consolidation of the proposed solutions with included run times for each.

Set Up

I have a 3.261 gigabyte ASCII text data file with one key-value pair per row. The file contains 3,339,550,320 rows in total and defies opening in any editor I have tried, including my go-to Vim. I need to subset this file in order to investigate some of the values that I've discovered only start around row ~500,000,000.

Because the file has so many rows:

  • I need to extract only a subset of the rows to do anything useful with the data.
  • Reading through every row leading up to the values I care about is going to take a long time.
  • If the solution reads past the rows I care about and continues reading the rest of the file it will waste time reading almost 3 billion irrelevant rows and take 6x longer than necessary.

My best-case-scenario is a solution that extracts only a single line from the file without reading any of the other rows in the file, but I can't think of how I would accomplish this in Bash.

For the purposes of my sanity I'm not going to be trying to read the full 500,000,000 lines I'd need for my own problem. Instead I'll be trying to extract row 50,000,000 out of 3,339,550,320 (which means reading the full file will take 60x longer than necessary).

I will be using the time built-in to benchmark each command.

Baseline

First let's see how the head tail solution:

$ time head -50000000 myfile.ascii | tail -1
pgm_icnt = 0

real    1m15.321s

The baseline for row 50 million is 00:01:15.321, if I'd gone straight for row 500 million it'd probably be ~12.5 minutes.

cut

I'm dubious of this one, but it's worth a shot:

$ time cut -f50000000 -d$'\n' myfile.ascii
pgm_icnt = 0

real    5m12.156s

This one took 00:05:12.156 to run, which is much slower than the baseline! I'm not sure whether it read through the entire file or just up to line 50 million before stopping, but regardless this doesn't seem like a viable solution to the problem.

AWK

I only ran the solution with the exit because I wasn't going to wait for the full file to run:

$ time awk 'NR == 50000000 {print; exit}' myfile.ascii
pgm_icnt = 0

real    1m16.583s

This code ran in 00:01:16.583, which is only ~1 second slower, but still not an improvement on the baseline. At this rate if the exit command had been excluded it would have probably taken around ~76 minutes to read the entire file!

Perl

I ran the existing Perl solution as well:

$ time perl -wnl -e '$.== 50000000 && print && exit;' myfile.ascii
pgm_icnt = 0

real    1m13.146s

This code ran in 00:01:13.146, which is ~2 seconds faster than the baseline. If I'd run it on the full 500,000,000 it would probably take ~12 minutes.

sed

The top answer on the board, here's my result:

$ time sed "50000000q;d" myfile.ascii
pgm_icnt = 0

real    1m12.705s

This code ran in 00:01:12.705, which is 3 seconds faster than the baseline, and ~0.4 seconds faster than Perl. If I'd run it on the full 500,000,000 rows it would have probably taken ~12 minutes.

mapfile

I have bash 3.1 and therefore cannot test the mapfile solution.

Conclusion

It looks like, for the most part, it's difficult to improve upon the head tail solution. At best the sed solution provides a ~3% increase in efficiency.

(percentages calculated with the formula % = (runtime/baseline - 1) * 100)

Row 50,000,000

  1. 00:01:12.705 (-00:00:02.616 = -3.47%) sed
  2. 00:01:13.146 (-00:00:02.175 = -2.89%) perl
  3. 00:01:15.321 (+00:00:00.000 = +0.00%) head|tail
  4. 00:01:16.583 (+00:00:01.262 = +1.68%) awk
  5. 00:05:12.156 (+00:03:56.835 = +314.43%) cut

Row 500,000,000

  1. 00:12:07.050 (-00:00:26.160) sed
  2. 00:12:11.460 (-00:00:21.750) perl
  3. 00:12:33.210 (+00:00:00.000) head|tail
  4. 00:12:45.830 (+00:00:12.620) awk
  5. 00:52:01.560 (+00:40:31.650) cut

Row 3,338,559,320

  1. 01:20:54.599 (-00:03:05.327) sed
  2. 01:21:24.045 (-00:02:25.227) perl
  3. 01:23:49.273 (+00:00:00.000) head|tail
  4. 01:25:13.548 (+00:02:35.735) awk
  5. 05:47:23.026 (+04:24:26.246) cut

How do I use select with date condition?

I always get the filter date into a datetime, with no time (time= 00:00:00.000)

DECLARE @FilterDate  datetime --final destination, will not have any time on it
DECLARE @GivenDateD  datetime --if you're given a datetime
DECLARE @GivenDateS  char(23) --if you're given a string, it can be any valid date format, not just the yyyy/mm/dd hh:mm:ss.mmm that I'm using

SET @GivenDateD='2009/03/30 13:42:50.123'
SET @GivenDateS='2009/03/30 13:42:50.123'

--remove the time and assign it to the datetime
@FilterDate=dateadd(dd, datediff(dd, 0, @FilterDateD), 0)
--OR
@FilterDate=dateadd(dd, datediff(dd, 0, @FilterDateS), 0)

You can use this WHERE clause to then filter:

WHERE ColumnDateTime>=@FilterDate AND ColumnDateTime<@FilterDate+1

this will give all matches that are on or after the beginning of the day on 2009/03/30 up to and including the complete day on 2009/03/30

you can do the same for START and END filter parameters as well. Always make the start date a datetime and use zero time on the day you want, and make the condition ">=". Always make the end date the zero time on the day after you want and use "<". Doing that, you will always include any dates properly, regardless of the time portion of the date.

Best Practices: working with long, multiline strings in PHP?

You should use heredoc or nowdoc.

$var = "some text";
$text = <<<EOT
  Place your text between the EOT. It's
  the delimiter that ends the text
  of your multiline string.
  $var
EOT;

The difference between heredoc and nowdoc is that PHP code embedded in a heredoc gets executed, while PHP code in nowdoc will be printed out as is.

$var = "foo";
$text = <<<'EOT'
  My $var
EOT;

In this case $text will have the value "My $var", not "My foo".

Notes:

  • Before the closing EOT; there should be no spaces or tabs. otherwise you will get an error.
  • The string/tag (EOT) that enclose the text is arbitrary, that is, one can use other strings, e.g. <<<FOO and FOO;
  • EOT : End of transmission, EOD: End of data. [Q]

How do I resolve ClassNotFoundException?

I deleted some unused imports and it fixed the problem for me. You can't not find a Class if you never look for it in the first place.

Difference between fprintf, printf and sprintf?

printf

  1. printf is used to perform output on the screen.
  2. syntax = printf("control string ", argument );
  3. It is not associated with File input/output

fprintf

  1. The fprintf it used to perform write operation in the file pointed to by FILE handle.
  2. The syntax is fprintf (filename, "control string ", argument );
  3. It is associated with file input/output

SQL MERGE statement to update data

UPDATE ed
SET ed.kWh = ted.kWh
FROM energydata ed
INNER JOIN temp_energydata ted ON ted.webmeterID = ed.webmeterID

sorting integers in order lowest to highest java

Take Inputs from User and Insertion Sort. Here is how it works:

package com.learning.constructor;

import java.util.Scanner;



public class InsertionSortArray {

public static void main(String[] args) {    

Scanner s=new Scanner(System.in);

System.out.println("enter number of elements");

int n=s.nextInt();


int arr[]=new int[n];

System.out.println("enter elements");

for(int i=0;i<n;i++){//for reading array
    arr[i]=s.nextInt();

}

System.out.print("Your Array Is: ");
//for(int i: arr){ //for printing array
for (int i = 0; i < arr.length; i++){
    System.out.print(arr[i] + ",");

}
System.out.println("\n");        

    int[] input = arr;
    insertionSort(input);
}

private static void printNumbers(int[] input) {

    for (int i = 0; i < input.length; i++) {
        System.out.print(input[i] + ", ");
    }
    System.out.println("\n");
}

public static void insertionSort(int array[]) {
    int n = array.length;
    for (int j = 1; j < n; j++) {
        int key = array[j];
        int i = j-1;
        while ( (i > -1) && ( array [i] > key ) ) {
            array [i+1] = array [i];
            i--;
        }
        array[i+1] = key;
        printNumbers(array);
    }
}

}

https with WCF error: "Could not find base address that matches scheme https"

I had this exact same problem. Except my solution was to add an "s" to the binding value.

Old: binding="mexHttpBinding"

New: binding="mexHttpsBinding"

web.config snippet:

<services>
    <service behaviorConfiguration="ServiceBehavior" name="LIMS.UI.Web.WCFServices.Accessioning.QuickDataEntryService">
        <endpoint behaviorConfiguration="AspNetAjaxBehavior" binding="webHttpBinding" bindingConfiguration="webBinding" 
            contract="LIMS.UI.Web.WCFServices.Accessioning.QuickDataEntryService" />
        <endpoint address="mex" binding="mexHttpsBinding" contract="IMetadataExchange" />
    </service>

How do I check whether a file exists without exceptions?

Additionally, os.access():

if os.access("myfile", os.R_OK):
    with open("myfile") as fp:
        return fp.read()

Being R_OK, W_OK, and X_OK the flags to test for permissions (doc).

Getting a better understanding of callback functions in JavaScript

Here is a basic example that explains the callback() function in JavaScript:

_x000D_
_x000D_
var x = 0;_x000D_
_x000D_
function testCallBack(param1, param2, callback) {_x000D_
  alert('param1= ' + param1 + ', param2= ' + param2 + ' X=' + x);_x000D_
  if (callback && typeof(callback) === "function") {_x000D_
    x += 1;_x000D_
    alert("Calla Back x= " + x);_x000D_
    x += 1;_x000D_
    callback();_x000D_
  }_x000D_
}_x000D_
_x000D_
testCallBack('ham', 'cheese', function() {_x000D_
  alert("Function X= " + x);_x000D_
});
_x000D_
_x000D_
_x000D_

JSFiddle

Remove Duplicate objects from JSON Array

You can use lodash, download here (4.17.15)

Example code:

var object = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 2 }];

_.uniqWith(object, _.isEqual);

// => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]

Save file/open file dialog box, using Swing & Netbeans GUI editor

I have created a sample UI which shows the save and open file dialog. Click on save button to open save dialog and click on open button to open file dialog.

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class FileChooserEx {
    public static void main(String[] args) {
        Runnable r = new Runnable() {

            @Override
            public void run() {
                new FileChooserEx().createUI();
            }
        };

        EventQueue.invokeLater(r);
    }

    private void createUI() {
        JFrame frame = new JFrame();
        frame.setLayout(new BorderLayout());

        JButton saveBtn = new JButton("Save");
        JButton openBtn = new JButton("Open");

        saveBtn.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent arg0) {
                JFileChooser saveFile = new JFileChooser();
                saveFile.showSaveDialog(null);
            }
        });

        openBtn.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent arg0) {
                JFileChooser openFile = new JFileChooser();
                openFile.showOpenDialog(null);
            }
        });

        frame.add(new JLabel("File Chooser"), BorderLayout.NORTH);
        frame.add(saveBtn, BorderLayout.CENTER);
        frame.add(openBtn, BorderLayout.SOUTH);
        frame.setTitle("File Chooser");
        frame.pack();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}

How to add a RequiredFieldValidator to DropDownList control?

Suppose your drop down list is:

<asp:DropDownList runat="server" id="ddl">
<asp:ListItem Value="0" text="Select a Value">
....
</asp:DropDownList>

There are two ways:

<asp:RequiredFieldValidator ID="re1" runat="Server" InitialValue="0" />

the 2nd way is to use a compare validator:

<asp:CompareValidator ID="re1" runat="Server" ValueToCompare="0" ControlToCompare="ddl" Operator="Equal" />

How to get records randomly from the oracle database?

SELECT *
FROM   (
    SELECT *
    FROM   table
    ORDER BY DBMS_RANDOM.RANDOM)
WHERE  rownum < 21;

How to deal with persistent storage (e.g. databases) in Docker

It depends on your scenario (this isn't really suitable for a production environment), but here is one way:

Creating a MySQL Docker Container

This gist of it is to use a directory on your host for data persistence.

How do I add one month to current date in Java?

Calendar cal = Calendar.getInstance(); 
cal.add(Calendar.MONTH, 1);

Android: why is there no maxHeight for a View?

In order to create a ScrollView or ListView with a maxHeight you just need to create a Transparent LinearLayout around it with a height of what you want the maxHeight to be. You then set the ScrollView's Height to wrap_content. This creates a ScrollView that appears to grow until its height is equal to the parent LinearLayout.

Error creating bean with name 'entityManagerFactory' defined in class path resource : Invocation of init method failed

In our case, we had some extra lines in the .properties file which was not needed with the new image.

spring.jpa.properties.hibernate.cache.use_second_level_cache=true

Obviously with didn't had that Entity what it tried to load.

How to temporarily exit Vim and go back

To extend user Zen's answer, you could add the following line in your ~/.vimrc file to allow quick toggling between Bash and Vim:

noremap <C-d> :sh<cr>

How can I get column names from a table in SQL Server?

SELECT TOP (0) [toID]
      ,[sourceID]
      ,[name]
      ,[address]
  FROM [ReportDatabase].[Ticket].[To]

Simple and doesnt require any sys tables

How to write a multiline Jinja statement

According to the documentation: https://jinja.palletsprojects.com/en/2.10.x/templates/#line-statements you may use multi-line statements as long as the code has parens/brackets around it. Example:

{% if ( (foo == 'foo' or bar == 'bar') and 
        (fooo == 'fooo' or baar == 'baar') ) %}
    <li>some text</li>
{% endif %}

Edit: Using line_statement_prefix = '#'* the code would look like this:

# if ( (foo == 'foo' or bar == 'bar') and 
       (fooo == 'fooo' or baar == 'baar') )
    <li>some text</li>
# endif

*Here's an example of how you'd specify the line_statement_prefix in the Environment:

from jinja2 import Environment, PackageLoader, select_autoescape
env = Environment(
    loader=PackageLoader('yourapplication', 'templates'),
    autoescape=select_autoescape(['html', 'xml']),
    line_statement_prefix='#'
)

Or using Flask:

from flask import Flask
app = Flask(__name__, instance_relative_config=True, static_folder='static')
app.jinja_env.filters['zip'] = zip
app.jinja_env.line_statement_prefix = '#'

How to convert color code into media.brush?

In code, you need to explicitly create a Brush instance:

Fill = new SolidColorBrush(Color.FromArgb(0xff, 0xff, 0x90))

How do I mount a host directory as a volume in docker compose

There are a few options

Short Syntax

Using the host : guest format you can do any of the following:

volumes:
  # Just specify a path and let the Engine create a volume
  - /var/lib/mysql

  # Specify an absolute path mapping
  - /opt/data:/var/lib/mysql

  # Path on the host, relative to the Compose file
  - ./cache:/tmp/cache

  # User-relative path
  - ~/configs:/etc/configs/:ro

  # Named volume
  - datavolume:/var/lib/mysql

Long Syntax

As of docker-compose v3.2 you can use long syntax which allows the configuration of additional fields that can be expressed in the short form such as mount type (volume, bind or tmpfs) and read_only.

version: "3.2"
services:
  web:
    image: nginx:alpine
    ports:
      - "80:80"
    volumes:
      - type: volume
        source: mydata
        target: /data
        volume:
          nocopy: true
      - type: bind
        source: ./static
        target: /opt/app/static

networks:
  webnet:

volumes:
  mydata:

Check out https://docs.docker.com/compose/compose-file/#long-syntax-3 for more info.

Best practices to test protected methods with PHPUnit

I suggest following workaround for "Henrik Paul"'s workaround/idea :)

You know names of private methods of your class. For example they are like _add(), _edit(), _delete() etc.

Hence when you want to test it from aspect of unit-testing, just call private methods by prefixing and/or suffixing some common word (for example _addPhpunit) so that when __call() method is called (since method _addPhpunit() doesn't exist) of owner class, you just put necessary code in __call() method to remove prefixed/suffixed word/s (Phpunit) and then to call that deduced private method from there. This is another good use of magic methods.

Try it out.

Verify host key with pysftp

If You try to connect by pysftp to "normal" FTP You have to set hostkey to None.

import pysftp

cnopts = pysftp.CnOpts()
cnopts.hostkeys = None 
with pysftp.Connection(host='****',username='****',password='***',port=22,cnopts=cnopts) as sftp:
    print('DO SOMETHING')

Android: Force EditText to remove focus?

check your xml file
 <EditText
            android:id="@+id/editText1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="14sp" >

            **<requestFocus />**
 </EditText>


//Remove  **<requestFocus />** from xml

Do conditional INSERT with SQL?

If you're looking to do an "upsert" one of the most efficient ways currently in SQL Server for single rows is this:

UPDATE myTable ...


IF @@ROWCOUNT=0
    INSERT INTO myTable ....

You can also use the MERGE syntax if you're doing this with sets of data rather than single rows.

If you want to INSERT and not UPDATE then you can just write your single INSERT statement and use WHERE NOT EXISTS (SELECT ...)

How to update values in a specific row in a Python Pandas DataFrame?

I needed to update and add suffix to few rows of the dataframe on conditional basis based on the another column's value of the same dataframe -

df with column Feature and Entity and need to update Entity based on specific feature type

df2= df1 df.loc[df.Feature == 'dnb', 'Entity'] = 'duns_' + df.loc[df.Feature == 'dnb','Entity']

jquery .html() vs .append()

You can get the second method to achieve the same effect by:

var mySecondDiv = $('<div></div>');
$(mySecondDiv).find('div').attr('id', 'mySecondDiv');
$('#myDiv').append(mySecondDiv);

Luca mentioned that html() just inserts hte HTML which results in faster performance.

In some occassions though, you would opt for the second option, consider:

// Clumsy string concat, error prone
$('#myDiv').html("<div style='width:'" + myWidth + "'px'>Lorem ipsum</div>");

// Isn't this a lot cleaner? (though longer)
var newDiv = $('<div></div>');
$(newDiv).find('div').css('width', myWidth);
$('#myDiv').append(newDiv);

Link to the issue number on GitHub within a commit message

Just include #xxx in your commit message to reference an issue without closing it.

With new GitHub issues 2.0 you can use these synonyms to reference an issue and close it (in your commit message):

  • fix #xxx
  • fixes #xxx
  • fixed #xxx
  • close #xxx
  • closes #xxx
  • closed #xxx
  • resolve #xxx
  • resolves #xxx
  • resolved #xxx

You can also substitute #xxx with gh-xxx.

Referencing and closing issues across repos also works:

fixes user/repo#xxx

Check out the documentation available in their Help section.

MySQL show current connection info

If you want to know the port number of your local host on which Mysql is running you can use this query on MySQL Command line client --

SHOW VARIABLES WHERE Variable_name = 'port';


mysql> SHOW VARIABLES WHERE Variable_name = 'port';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| port          | 3306  |
+---------------+-------+
1 row in set (0.00 sec)

It will give you the port number on which MySQL is running.


If you want to know the hostname of your Mysql you can use this query on MySQL Command line client --

SHOW VARIABLES WHERE Variable_name = 'hostname';


mysql> SHOW VARIABLES WHERE Variable_name = 'hostname';
+-------------------+-------+
| Variable_name     | Value |
+-------------------+-------+
| hostname          | Dell  |
+-------------------+-------+
1 row in set (0.00 sec)

It will give you the hostname for mysql.


If you want to know the username of your Mysql you can use this query on MySQL Command line client --

select user();   


mysql> select user();
+----------------+
| user()         |
+----------------+
| root@localhost |
+----------------+
1 row in set (0.00 sec)

It will give you the username for mysql.

How do I select elements of an array given condition?

IMO OP does not actually want np.bitwise_and() (aka &) but actually wants np.logical_and() because they are comparing logical values such as True and False - see this SO post on logical vs. bitwise to see the difference.

>>> x = array([5, 2, 3, 1, 4, 5])
>>> y = array(['f','o','o','b','a','r'])
>>> output = y[np.logical_and(x > 1, x < 5)] # desired output is ['o','o','a']
>>> output
array(['o', 'o', 'a'],
      dtype='|S1')

And equivalent way to do this is with np.all() by setting the axis argument appropriately.

>>> output = y[np.all([x > 1, x < 5], axis=0)] # desired output is ['o','o','a']
>>> output
array(['o', 'o', 'a'],
      dtype='|S1')

by the numbers:

>>> %timeit (a < b) & (b < c)
The slowest run took 32.97 times longer than the fastest. This could mean that an intermediate result is being cached.
100000 loops, best of 3: 1.15 µs per loop

>>> %timeit np.logical_and(a < b, b < c)
The slowest run took 32.59 times longer than the fastest. This could mean that an intermediate result is being cached.
1000000 loops, best of 3: 1.17 µs per loop

>>> %timeit np.all([a < b, b < c], 0)
The slowest run took 67.47 times longer than the fastest. This could mean that an intermediate result is being cached.
100000 loops, best of 3: 5.06 µs per loop

so using np.all() is slower, but & and logical_and are about the same.

$_POST not working. "Notice: Undefined index: username..."

undefined index means that somewhere in the $_POST array, there isn't an index (key) for the key username.

You should be setting your posted values into variables for a more clean solution, and it's a good habit to get into.

If I was having a similar error, I'd do something like this:

$username = $_POST['username']; // you should really do some more logic to see if it's set first
echo $username;

If username didn't turn up, that'd mean I was screwing up somewhere. You can also,

var_dump($_POST);

To see what you're posting. var_dump is really useful as far as debugging. Check it out: var_dump

Read values into a shell variable from a pipe

if you want to read in lots of data and work on each line separately you could use something like this:

cat myFile | while read x ; do echo $x ; done

if you want to split the lines up into multiple words you can use multiple variables in place of x like this:

cat myFile | while read x y ; do echo $y $x ; done

alternatively:

while read x y ; do echo $y $x ; done < myFile

But as soon as you start to want to do anything really clever with this sort of thing you're better going for some scripting language like perl where you could try something like this:

perl -ane 'print "$F[0]\n"' < myFile

There's a fairly steep learning curve with perl (or I guess any of these languages) but you'll find it a lot easier in the long run if you want to do anything but the simplest of scripts. I'd recommend the Perl Cookbook and, of course, The Perl Programming Language by Larry Wall et al.

Add row to query result using select

You use it like this:

SELECT  age, name
FROM    users
UNION
SELECT  25 AS age, 'Betty' AS name

Use UNION ALL to allow duplicates: if there is a 25-years old Betty among your users, the second query will not select her again with mere UNION.

Purpose of __repr__ method?

__repr__ should return a printable representation of the object, most likely one of the ways possible to create this object. See official documentation here. __repr__ is more for developers while __str__ is for end users.

A simple example:

>>> class Point:
...   def __init__(self, x, y):
...     self.x, self.y = x, y
...   def __repr__(self):
...     return 'Point(x=%s, y=%s)' % (self.x, self.y)
>>> p = Point(1, 2)
>>> p
Point(x=1, y=2)

Where does Internet Explorer store saved passwords?

No guarantee, but I suspect IE uses the older Protected Storage API.

How to write html code inside <?php ?>, I want write html code within the PHP script so that it can be echoed from Backend

Try it like,

<?php 
    $name='your name';
    echo '<table>
       <tr><th>Name</th></tr>
       <tr><td>'.$name.'</td></tr>
    </table>';
?>

Updated

<?php 
    echo '<table>
       <tr><th>Rst</th><th>Marks</th></tr>
       <tr><td>'.$rst4.'</td><td>'.$marks4.'</td></tr>
    </table>';
?>

What does "Content-type: application/json; charset=utf-8" really mean?

Dart http's implementation process the bytes thanks to that "charset=utf-8", so i'm sure several implementations out there supports this, to avoid the "latin-1" fallback charset when reading the bytes from the response. In my case, I totally lose format on the response body string, so I have to do the bytes encoding manually to utf8, or add that header "inner" parameter on my server's API response.

Debug/run standard java in Visual Studio Code IDE and OS X?

Code Runner Extension will only let you "run" java files.

To truly debug 'Java' files follow the quick one-time setup:

  • Install Java Debugger Extension in VS Code and reload.
  • open an empty folder/project in VS code.
  • create your java file (s).
  • create a folder .vscode in the same folder.
  • create 2 files inside .vscode folder: tasks.json and launch.json
  • copy paste below config in tasks.json:
{
    "version": "2.0.0",
    "type": "shell",
    "presentation": {
        "echo": true,
        "reveal": "always",
        "focus": false,
        "panel": "shared"
    },
    "isBackground": true,
    "tasks": [
        {
            "taskName": "build",
            "args": ["-g", "${file}"],
            "command": "javac"
        }
    ]
}
  • copy paste below config in launch.json:
{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Debug Java",
            "type": "java",
            "request": "launch",
            "externalConsole": true,                //user input dosen't work if set it to false :(
            "stopOnEntry": true,
            "preLaunchTask": "build",                 // Runs the task created above before running this configuration
            "jdkPath": "${env:JAVA_HOME}/bin",        // You need to set JAVA_HOME enviroment variable
            "cwd": "${workspaceRoot}",
            "startupClass": "${workspaceRoot}${file}",
            "sourcePath": ["${workspaceRoot}"],   // Indicates where your source (.java) files are
            "classpath": ["${workspaceRoot}"],    // Indicates the location of your .class files
            "options": [],                             // Additional options to pass to the java executable
            "args": []                                // Command line arguments to pass to the startup class
        }

    ],
    "compounds": []
}

You are all set to debug java files, open any java file and press F5 (Debug->Start Debugging).


Tip: *To hide .class files in the side explorer of VS code, open settings of VS code and paste the below config:

"files.exclude": {
        "*.class": true
    }

enter image description here

How to check if a double is null?

I would recommend using a Double not a double as your type then you check against null.

How do I query for all dates greater than a certain date in SQL Server?

DateTime start1 = DateTime.Parse(txtDate.Text);

SELECT * 
FROM dbo.March2010 A
WHERE A.Date >= start1;

First convert TexBox into the Datetime then....use that variable into the Query

Under what conditions is a JSESSIONID created?

JSESSIONID cookie is created/sent when session is created. Session is created when your code calls request.getSession() or request.getSession(true) for the first time. If you just want to get the session, but not create it if it doesn't exist, use request.getSession(false) -- this will return you a session or null. In this case, new session is not created, and JSESSIONID cookie is not sent. (This also means that session isn't necessarily created on first request... you and your code are in control when the session is created)

Sessions are per-context:

SRV.7.3 Session Scope

HttpSession objects must be scoped at the application (or servlet context) level. The underlying mechanism, such as the cookie used to establish the session, can be the same for different contexts, but the object referenced, including the attributes in that object, must never be shared between contexts by the container.

(Servlet 2.4 specification)

Update: Every call to JSP page implicitly creates a new session if there is no session yet. This can be turned off with the session='false' page directive, in which case session variable is not available on JSP page at all.

How to configure slf4j-simple

This is a sample simplelogger.properties which you can place on the classpath (uncomment the properties you wish to use):

# SLF4J's SimpleLogger configuration file
# Simple implementation of Logger that sends all enabled log messages, for all defined loggers, to System.err.

# Default logging detail level for all instances of SimpleLogger.
# Must be one of ("trace", "debug", "info", "warn", or "error").
# If not specified, defaults to "info".
#org.slf4j.simpleLogger.defaultLogLevel=info

# Logging detail level for a SimpleLogger instance named "xxxxx".
# Must be one of ("trace", "debug", "info", "warn", or "error").
# If not specified, the default logging detail level is used.
#org.slf4j.simpleLogger.log.xxxxx=

# Set to true if you want the current date and time to be included in output messages.
# Default is false, and will output the number of milliseconds elapsed since startup.
#org.slf4j.simpleLogger.showDateTime=false

# The date and time format to be used in the output messages.
# The pattern describing the date and time format is the same that is used in java.text.SimpleDateFormat.
# If the format is not specified or is invalid, the default format is used.
# The default format is yyyy-MM-dd HH:mm:ss:SSS Z.
#org.slf4j.simpleLogger.dateTimeFormat=yyyy-MM-dd HH:mm:ss:SSS Z

# Set to true if you want to output the current thread name.
# Defaults to true.
#org.slf4j.simpleLogger.showThreadName=true

# Set to true if you want the Logger instance name to be included in output messages.
# Defaults to true.
#org.slf4j.simpleLogger.showLogName=true

# Set to true if you want the last component of the name to be included in output messages.
# Defaults to false.
#org.slf4j.simpleLogger.showShortLogName=false

Algorithm/Data Structure Design Interview Questions

A trivial one is to ask them to code up a breadth-first search of a tree from scratch. Yeah, if you know what you're doing it is trivial. But a lot of programmers don't know how to tackle it.

One that I find more useful still is as follows. I've given this in a number of languages, here is a Perl version. First I give them the following code sample:

# @a and @b are two arrays which are already populated.
my @int;
OUTER: for my $x (@a) {
  for my $y (@b) {
    if ($x eq $y) {
      push @int, $x;
      next OUTER;
    }
  }
}

Then I ask them the following questions. I ask them slowly, give people time to think, and am willing to give them nudges:

  1. What is in @int when this code is done?
  2. This code is put into production and there is a performance problem that is tracked back to this code. Explain the potential performance problem. (If they are struggling I'll ask how many comparisons it takes if @a and @b each have 100,000 elements. I am not looking for specific terminology, just a back of the envelope estimate.)
  3. Without code, suggest to make this faster. (If they propose a direction that is easy to code, I'll ask them to code it. If they think of a solution that will result in @int being changed in any way (eg commonly order), I'll push to see whether they realize that they shouldn't code the fix before checking whether that matters.)

If they come up with a slightly (or very) wrong solution, the following silly data set will find most mistakes you run across:

@a = qw(
  hello
  world
  hello
  goodbye
  earthlings
);
@b = qw(
  earthlings
  say
  hello
  earthlings
);

I'd guess that about 2/3 of candidates fail this question. I have yet to encounter a competent programmer who had trouble with it. I've found that people with good common sense and very little programming background do better on this than average programmers with a few years of experience.

I would suggest using these questions as filters. Don't hire someone because they can answer these. But if they can't answer these, then don't hire them.

How do I call a non-static method from a static method in C#?

You'll need to create an instance of the class and invoke the method on it.

public class Foo
{
    public void Data1()
    {
    }

    public static void Data2()
    {
         Foo foo = new Foo();
         foo.Data1();
    }
}

How to list all files in a directory and its subdirectories in hadoop hdfs

You'll need to use the FileSystem object and perform some logic on the resultant FileStatus objects to manually recurse into the subdirectories.

You can also apply a PathFilter to only return the xml files using the listStatus(Path, PathFilter) method

The hadoop FsShell class has examples of this for the hadoop fs -lsr command, which is a recursive ls - see the source, around line 590 (the recursive step is triggered on line 635)

How to allow only one radio button to be checked?

All radio buttons have to have the same name:

<input type='radio' name='foo'>

Only 1 radio button of each group of buttons with the same name can be checked.

How to add a ScrollBar to a Stackpanel

It works like this:

<ScrollViewer VerticalScrollBarVisibility="Visible" HorizontalScrollBarVisibility="Disabled" Width="340" HorizontalAlignment="Left" Margin="12,0,0,0">
        <StackPanel Name="stackPanel1" Width="311">

        </StackPanel>
</ScrollViewer>

TextBox tb = new TextBox();
tb.TextChanged += new TextChangedEventHandler(TextBox_TextChanged);
stackPanel1.Children.Add(tb);

Plot a bar using matplotlib using a dictionary

I often load the dict into a pandas DataFrame then use the plot function of the DataFrame.
Here is the one-liner:

pandas.DataFrame(D, index=['quantity']).plot(kind='bar')

resulting plot

Android Studio does not show layout preview

Force refresh helped me.

It is at the top of the design tab.

enter image description here

Pandas read_csv from url

As I commented you need to use a StringIO object and decode i.e c=pd.read_csv(io.StringIO(s.decode("utf-8"))) if using requests, you need to decode as .content returns bytes if you used .text you would just need to pass s as is s = requests.get(url).text c = pd.read_csv(StringIO(s)).

A simpler approach is to pass the correct url of the raw data directly to read_csv, you don't have to pass a file like object, you can pass a url so you don't need requests at all:

c = pd.read_csv("https://raw.githubusercontent.com/cs109/2014_data/master/countries.csv")

print(c)

Output:

                              Country         Region
0                             Algeria         AFRICA
1                              Angola         AFRICA
2                               Benin         AFRICA
3                            Botswana         AFRICA
4                             Burkina         AFRICA
5                             Burundi         AFRICA
6                            Cameroon         AFRICA
..................................

From the docs:

filepath_or_buffer :

string or file handle / StringIO The string could be a URL. Valid URL schemes include http, ftp, s3, and file. For file URLs, a host is expected. For instance, a local file could be file ://localhost/path/to/table.csv

How can I set a cookie in react?

A very simple solution is using the sfcookies package. You just have to install it using npm for example: npm install sfcookies --save

Then you import on the file:

import { bake_cookie, read_cookie, delete_cookie } from 'sfcookies';

create a cookie key:

const cookie_key = 'namedOFCookie';

on your submit function, you create the cookie by saving data on it just like this:

bake_cookie(cookie_key, 'test');

to delete it just do

delete_cookie(cookie_key);

and to read it:

read_cookie(cookie_key)

Simple and easy to use.

Text in HTML Field to disappear when clicked?

To accomplish that, you can use the two events onfocus and onblur:

<input type="text" name="theName" value="DefaultValue"
  onblur="if(this.value==''){ this.value='DefaultValue'; this.style.color='#BBB';}"
  onfocus="if(this.value=='DefaultValue'){ this.value=''; this.style.color='#000';}"
  style="color:#BBB;" />

SQL Server: Extract Table Meta-Data (description, fields and their data types)

Easiest way to get basic metadata summary is to use a temp table and then use EXEC function:

SELECT * INTO #TempTable FROM TableName
EXEC [tempdb].[dbo].[sp_help] N'#TempTable'

For all columns in the table, this will give you Column Name,
Data Type,
Computed Length,
Prec,
Scale, Nullable,
TrimTrailingBlanks, FixedLenNullInSource, Collation Type

SQL Query to find the last day of the month

Declare @GivenDate datetime 
Declare @ResultDate datetime 
DEclare @EOMDate datetime 
Declare @Day int 
set @GivenDate=getdate() 
set @GivenDate= (dateadd(mm,1,@GivenDate)) 
set @Day =day(@GivenDate) 
set @ResultDate=dateadd(dd,-@Day+1,@GivenDate) 
select @EOMDate =dateadd(dd,-1 ,@ResultDate) 
select @EOMDate 

What do the crossed style properties in Google Chrome devtools mean?

In addition to the above answer I also want to highlight a case of striked out property which really surprised me.

If you are adding a background image to a div :

<div class = "myBackground">

</div>

You want to scale the image to fit in the dimensions of the div so this would be your normal class definition.

.myBackground {

 height:100px;
 width:100px;
 background: url("/img/bck/myImage.jpg") no-repeat; 
 background-size: contain;

}

but if you interchange the order as :-

.myBackground {
 height:100px;
 width:100px;
 background-size: contain;  //before the background
 background: url("/img/bck/myImage.jpg") no-repeat; 
}

then in chrome you ll see background-size as striked out. I am not sure why this is , but yeah you dont want to mess with it.

"Debug certificate expired" error in Eclipse Android plugins

  • WINDOWS

Delete: debug.keystore located in C:\Documents and Settings\\[user]\.android, Clean and build your project.

  • Windows 7 go to C:\Users\[username]\.android and delete debug.keystore file.

Clean and build your project.

  • MAC

Delete your keystore located in ~/.android/debug.keystore Clean and build your project.

In all the options if you can´t get the new debug.keystore just restart eclipse.

creating json object with variables

It's called on Object Literal

I'm not sure what you want your structure to be, but according to what you have above, where you put the values in variables try this.

var formObject =  {"formObject": [
                {"firstName": firstName, "lastName": lastName},
                {"phoneNumber": phone},
                {"address": address},
                ]}

Although this seems to make more sense (Why do you have an array in the above literal?):

var formObject = {
   firstName: firstName
   ...
}

How do I assign a null value to a variable in PowerShell?

If the goal simply is to list all computer objects with an empty description attribute try this

import-module activedirectory  
$domain = "domain.example.com" 
Get-ADComputer -Filter '*' -Properties Description | where { $_.Description -eq $null }

Remove last character of a StringBuilder?

Just get the position of the last character occurrence.

for(String serverId : serverIds) {
 sb.append(serverId);
 sb.append(",");
}
sb.deleteCharAt(sb.lastIndexOf(","));

Since lastIndexOf will perform a reverse search, and you know that it will find at the first try, performance won't be an issue here.

EDIT

Since I keep getting ups on my answer (thanks folks ), it is worth regarding that:

On Java 8 onward it would just be more legible and explicit to use StringJoiner. It has one method for a simple separator, and an overload for prefix and suffix.

Examples taken from here: example

Example using simple separator:

    StringJoiner mystring = new StringJoiner("-");    

    // Joining multiple strings by using add() method  
    mystring.add("Logan");  
    mystring.add("Magneto");  
    mystring.add("Rogue");  
    mystring.add("Storm");  

    System.out.println(mystring);

Output:

Logan-Magneto-Rogue-Storm

Example with suffix and prefix:

    StringJoiner mystring = new StringJoiner(",", "(", ")");    

    // Joining multiple strings by using add() method  
    mystring.add("Negan");  
    mystring.add("Rick");  
    mystring.add("Maggie");  
    mystring.add("Daryl");  

    System.out.println(mystring);

Output

(Negan,Rick,Maggie,Daryl)

How can I go back/route-back on vue-router?

You can use Programmatic Navigation.In order to go back, you use this:

router.go(n) 

Where n can be positive or negative (to go back). This is the same as history.back().So you can have your element like this:

<a @click="$router.go(-1)">back</a>

Attaching click to anchor tag in angular

<a href="#" (click)="onGoToPage2()">Go to page 2</a>

Why is the minidlna database not being refreshed?

There is a patch for the sourcecode of minidlna at sourceforge available that does not make a full rescan, but a kind of incremental scan. That worked fine, but with some later version, the patch is broken. See here Link to SF

Regards Gerry

What is the purpose and use of **kwargs?

Motif: *args and **kwargs serves as a placeholder for the arguments that need to be passed to a function call

using *args and **kwargs to call a function

def args_kwargs_test(arg1, arg2, arg3):
    print "arg1:", arg1
    print "arg2:", arg2
    print "arg3:", arg3

Now we'll use *args to call the above defined function

#args can either be a "list" or "tuple"
>>> args = ("two", 3, 5)  
>>> args_kwargs_test(*args)

result:

arg1: two
arg2: 3
arg3: 5


Now, using **kwargs to call the same function

#keyword argument "kwargs" has to be a dictionary
>>> kwargs = {"arg3":3, "arg2":'two', "arg1":5}
>>> args_kwargs_test(**kwargs)

result:

arg1: 5
arg2: two
arg3: 3

Bottomline : *args has no intelligence, it simply interpolates the passed args to the parameters(in left-to-right order) while **kwargs behaves intelligently by placing the appropriate value @ the required place

Add/Delete table rows dynamically using JavaScript

1 & 2: innerHTML can take HTML as well as text. You could do something like:

c1.innerHTML = "<input size=25 type=\"text\" id='newID' readonly=true/>";

May or may not be the best way to do it, but you could do it that way.

3: I would just use a global variable that holds the number of POIs and increment/decrement it each time.

Remove NaN from pandas series

>>> s = pd.Series([1,2,3,4,np.NaN,5,np.NaN])
>>> s[~s.isnull()]
0    1
1    2
2    3
3    4
5    5

update or even better approach as @DSM suggested in comments, using pandas.Series.dropna():

>>> s.dropna()
0    1
1    2
2    3
3    4
5    5

PHP DateTime __construct() Failed to parse time string (xxxxxxxx) at position x

You should use setTimestamp instead, if you hardcode it:

$start_date = new DateTime();
$start_date->setTimestamp(1372622987);

in your case

$start_date = new DateTime();
$start_date->setTimestamp($dbResult->db_timestamp);

.htaccess File Options -Indexes on Subdirectories

htaccess files affect the directory they are placed in and all sub-directories, that is an htaccess file located in your root directory (yoursite.com) would affect yoursite.com/content, yoursite.com/content/contents, etc.

http://www.javascriptkit.com/howto/htaccess.shtml

How do I raise an exception in Rails so it behaves like other Rails exceptions?

You can do it like this:

class UsersController < ApplicationController
  ## Exception Handling
  class NotActivated < StandardError
  end

  rescue_from NotActivated, :with => :not_activated

  def not_activated(exception)
    flash[:notice] = "This user is not activated."
    Event.new_event "Exception: #{exception.message}", current_user, request.remote_ip
    redirect_to "/"
  end

  def show
      // Do something that fails..
      raise NotActivated unless @user.is_activated?
  end
end

What you're doing here is creating a class "NotActivated" that will serve as Exception. Using raise, you can throw "NotActivated" as an Exception. rescue_from is the way of catching an Exception with a specified method (not_activated in this case). Quite a long example, but it should show you how it works.

Best wishes,
Fabian

Bootstrap modal: close current, open new

Simple and elegant solution for BootStrap 3.x. The same modal can be reused in this way.

$("#myModal").modal("hide");
$('#myModal').on('hidden.bs.modal', function (e) {
   $("#myModal").html(data);
   $("#myModal").modal();
   // do something more...
}); 

Keep background image fixed during scroll using css

Just add background-attachment to your code

body {
    background-position: center;
    background-image: url(../images/images5.jpg);
    background-attachment: fixed;
}

How to add an image to an svg container using D3.js

nodeEnter.append("svg:image")
.attr('x', -9)
.attr('y', -12)
.attr('width', 20)
.attr('height', 24)
.attr("xlink:href", "resources/images/check.png")

Passing multiple parameters to pool.map() function in Python

You could use a map function that allows multiple arguments, as does the fork of multiprocessing found in pathos.

>>> from pathos.multiprocessing import ProcessingPool as Pool
>>> 
>>> def add_and_subtract(x,y):
...   return x+y, x-y
... 
>>> res = Pool().map(add_and_subtract, range(0,20,2), range(-5,5,1))
>>> res
[(-5, 5), (-2, 6), (1, 7), (4, 8), (7, 9), (10, 10), (13, 11), (16, 12), (19, 13), (22, 14)]
>>> Pool().map(add_and_subtract, *zip(*res))
[(0, -10), (4, -8), (8, -6), (12, -4), (16, -2), (20, 0), (24, 2), (28, 4), (32, 6), (36, 8)]

pathos enables you to easily nest hierarchical parallel maps with multiple inputs, so we can extend our example to demonstrate that.

>>> from pathos.multiprocessing import ThreadingPool as TPool
>>> 
>>> res = TPool().amap(add_and_subtract, *zip(*Pool().map(add_and_subtract, range(0,20,2), range(-5,5,1))))
>>> res.get()
[(0, -10), (4, -8), (8, -6), (12, -4), (16, -2), (20, 0), (24, 2), (28, 4), (32, 6), (36, 8)]

Even more fun, is to build a nested function that we can pass into the Pool. This is possible because pathos uses dill, which can serialize almost anything in python.

>>> def build_fun_things(f, g):
...   def do_fun_things(x, y):
...     return f(x,y), g(x,y)
...   return do_fun_things
... 
>>> def add(x,y):
...   return x+y
... 
>>> def sub(x,y):
...   return x-y
... 
>>> neato = build_fun_things(add, sub)
>>> 
>>> res = TPool().imap(neato, *zip(*Pool().map(neato, range(0,20,2), range(-5,5,1))))
>>> list(res)
[(0, -10), (4, -8), (8, -6), (12, -4), (16, -2), (20, 0), (24, 2), (28, 4), (32, 6), (36, 8)]

If you are not able to go outside of the standard library, however, you will have to do this another way. Your best bet in that case is to use multiprocessing.starmap as seen here: Python multiprocessing pool.map for multiple arguments (noted by @Roberto in the comments on the OP's post)

Get pathos here: https://github.com/uqfoundation

Disable all dialog boxes in Excel while running VB script?

In Access VBA I've used this to turn off all the dialogs when running a bunch of updates:

DoCmd.SetWarnings False

After running all the updates, the last step in my VBA script is:

DoCmd.SetWarnings True

Hope this helps.

Spring Boot and how to configure connection details to MongoDB?

Just to quote Boot Docs:

You can set spring.data.mongodb.uri property to change the url, or alternatively specify a host/port. For example, you might declare the following in your application.properties:

spring.data.mongodb.host=mongoserver
spring.data.mongodb.port=27017

All available options for spring.data.mongodb prefix are fields of MongoProperties:

private String host;

private int port = DBPort.PORT;

private String uri = "mongodb://localhost/test";

private String database;

private String gridFsDatabase;

private String username;

private char[] password;

How to get JSON from URL in JavaScript?

If you want to do it in plain javascript, you can define a function like this:

var getJSON = function(url, callback) {
    var xhr = new XMLHttpRequest();
    xhr.open('GET', url, true);
    xhr.responseType = 'json';
    xhr.onload = function() {
      var status = xhr.status;
      if (status === 200) {
        callback(null, xhr.response);
      } else {
        callback(status, xhr.response);
      }
    };
    xhr.send();
};

And use it like this:

getJSON('http://query.yahooapis.com/v1/public/yql?q=select%20%2a%20from%20yahoo.finance.quotes%20WHERE%20symbol%3D%27WRC%27&format=json&diagnostics=true&env=store://datatables.org/alltableswithkeys&callback',
function(err, data) {
  if (err !== null) {
    alert('Something went wrong: ' + err);
  } else {
    alert('Your query count: ' + data.query.count);
  }
});

Note that data is an object, so you can access its attributes without having to parse it.

Error: request entity too large

After ?o many tries I got my solution

I have commented this line

app.use(bodyParser.json());

and I put

app.use(bodyParser.json({limit: '50mb'}))

Then it works

How do I import a namespace in Razor View Page?

I think in order import namespace in razor view, you just need to add below way:

@using XX.YY.ZZ

How do I make an http request using cookies on Android?

Since Apache library is deprecated, for those who want to use HttpURLConncetion , I wrote this class to send Get and Post Request with the help of this answer:

public class WebService {

static final String COOKIES_HEADER = "Set-Cookie";
static final String COOKIE = "Cookie";

static CookieManager msCookieManager = new CookieManager();

private static int responseCode;

public static String sendPost(String requestURL, String urlParameters) {

    URL url;
    String response = "";
    try {
        url = new URL(requestURL);

        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setReadTimeout(15000);
        conn.setConnectTimeout(15000);
        conn.setRequestMethod("POST");

        conn.setRequestProperty("Content-Type", "application/json; charset=utf-8");

        if (msCookieManager.getCookieStore().getCookies().size() > 0) {
            //While joining the Cookies, use ',' or ';' as needed. Most of the server are using ';'
            conn.setRequestProperty(COOKIE ,
                    TextUtils.join(";", msCookieManager.getCookieStore().getCookies()));
        }

        conn.setDoInput(true);
        conn.setDoOutput(true);

        OutputStream os = conn.getOutputStream();
        BufferedWriter writer = new BufferedWriter(
                new OutputStreamWriter(os, "UTF-8"));

        if (urlParameters != null) {
            writer.write(urlParameters);
        }
        writer.flush();
        writer.close();
        os.close();

        Map<String, List<String>> headerFields = conn.getHeaderFields();
        List<String> cookiesHeader = headerFields.get(COOKIES_HEADER);

        if (cookiesHeader != null) {
            for (String cookie : cookiesHeader) {
                msCookieManager.getCookieStore().add(null, HttpCookie.parse(cookie).get(0));
            }
        }

        setResponseCode(conn.getResponseCode());

        if (getResponseCode() == HttpsURLConnection.HTTP_OK) {

            String line;
            BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
            while ((line = br.readLine()) != null) {
                response += line;
            }
        } else {
            response = "";
        }
    } catch (Exception e) {
        e.printStackTrace();
    }

    return response;
}


// HTTP GET request
public static String sendGet(String url) throws Exception {

    URL obj = new URL(url);
    HttpURLConnection con = (HttpURLConnection) obj.openConnection();

    // optional default is GET
    con.setRequestMethod("GET");

    //add request header 
    con.setRequestProperty("User-Agent", "Mozilla");
    /*
    * https://stackoverflow.com/questions/16150089/how-to-handle-cookies-in-httpurlconnection-using-cookiemanager
    * Get Cookies form cookieManager and load them to connection:
     */
    if (msCookieManager.getCookieStore().getCookies().size() > 0) {
        //While joining the Cookies, use ',' or ';' as needed. Most of the server are using ';'
        con.setRequestProperty(COOKIE ,
                TextUtils.join(";", msCookieManager.getCookieStore().getCookies()));
    }

    /*
    * https://stackoverflow.com/questions/16150089/how-to-handle-cookies-in-httpurlconnection-using-cookiemanager
    * Get Cookies form response header and load them to cookieManager:
     */
    Map<String, List<String>> headerFields = con.getHeaderFields();
    List<String> cookiesHeader = headerFields.get(COOKIES_HEADER);
    if (cookiesHeader != null) {
        for (String cookie : cookiesHeader) {
            msCookieManager.getCookieStore().add(null, HttpCookie.parse(cookie).get(0));
        }
    }


    int responseCode = con.getResponseCode();

    BufferedReader in = new BufferedReader(
            new InputStreamReader(con.getInputStream()));
    String inputLine;
    StringBuffer response = new StringBuffer();

    while ((inputLine = in.readLine()) != null) {
        response.append(inputLine);
    }
    in.close();

    return response.toString();
}

public static void setResponseCode(int responseCode) {
    WebService.responseCode = responseCode;
    Log.i("Milad", "responseCode" + responseCode);
}


public static int getResponseCode() {
    return responseCode;
}
}

What JSON library to use in Scala?

I suggest using jerkson, it supports most basic type conversions:

scala> import com.codahale.jerkson.Json._

scala> val l = List( 
                 Map( "id" -> 1, "name" -> "John" ),
                 Map( "id" -> 2, "name" -> "Dani")
               )

scala> generate( l )

res1: String = [{"id":1,"name":"John"},{"id":2,"name":"Dani"}]

How to get disk capacity and free space of remote computer

Just found Get-Volume command, which returns SizeRemaining, so something like (Get-Volume -DriveLetter C).SizeRemaining / (1e+9) can be used to see remained Gb for disk C. Seems works faster than Get-WmiObject Win32_LogicalDisk.

MySQL Workbench - Connect to a Localhost

Its Worked for me on Windows

First i installed and started XAMPP Control Panel enter image description here

Clicked for Start under Actions for MySQL. And below is my Configuration for MySQL (MySQL Workbench 8.0 CE) Connections enter image description here And it got connected with Test DataBase

How to properly export an ES6 class in Node 4?

class expression can be used for simplicity.

 // Foo.js
'use strict';

// export default class Foo {}
module.exports = class Foo {}

-

// main.js
'use strict';

const Foo = require('./Foo.js');

let Bar = new class extends Foo {
  constructor() {
    super();
    this.name = 'bar';
  }
}

console.log(Bar.name);

How to get random value out of an array?

The array_rand function seems to have an uneven distribution on large arrays, not every array item is equally likely to get picked. Using shuffle on the array and then taking the first element doesn't have this problem:

$myArray = array(1, 2, 3, 4, 5);

// Random shuffle
shuffle($myArray);

// First element is random now
$randomValue = $myArray[0];

Create zip file and ignore directory structure

Retain the parent directory so unzip doesn't spew files everywhere

When zipping directories, keeping the parent directory in the archive will help to avoid littering your current directory when you later unzip the archive file

So to avoid retaining all paths, and since you can't use -j and -r together ( you'll get an error ), you can do this instead:

cd path/to/parent/dir/;
zip -r ../my.zip ../$(basename $PWD)
cd -;

The ../$(basename $PWD) is the magic that retains the parent directory.

So now unzip my.zip will give a folder containing all your files:

parent-directory
+-- file1
+-- file2
+-- dir1
¦   +-- file3
¦   +-- file4

Instead of littering the current directory with the unzipped files:

file1
file2
dir1
+-- file3
+-- file4

Linq code to select one item

FirstOrDefault or SingleOrDefault might be useful, depending on your scenario, and whether you want to handle there being zero or more than one matches:

FirstOrDefault: Returns the first element of a sequence, or a default value if no element is found.

SingleOrDefault: Returns the only element of a sequence, or a default value if the sequence is empty; this method throws an exception if there is more than one element in the sequence

I don't know how this works in a linq 'from' query but in lambda syntax it looks like this:

var item1 = Items.FirstOrDefault(x => x.Id == 123);
var item2 = Items.SingleOrDefault(x => x.Id == 123);

R memory management / cannot allocate vector of size n Mb

The simplest way to sidestep this limitation is to switch to 64 bit R.

Get the key corresponding to the minimum value within a dictionary

Here's an answer that actually gives the solution the OP asked for:

>>> d = {320:1, 321:0, 322:3}
>>> d.items()
[(320, 1), (321, 0), (322, 3)]
>>> # find the minimum by comparing the second element of each tuple
>>> min(d.items(), key=lambda x: x[1]) 
(321, 0)

Using d.iteritems() will be more efficient for larger dictionaries, however.

rails 3 validation on uniqueness on multiple attributes

Dont work for me, need to put scope in plural

validates_uniqueness_of :teacher_id, :scopes => [:semester_id, :class_id]

Eclipse error: "The import XXX cannot be resolved"

In order to download non-existing jar file in your .m2 directory, you should run mvn clean install command for your project pom.xml. Then you should update the project dependencies by clicking Alt+F5. This works for me!

How do I reverse a C++ vector?

#include<algorithm>
#include<vector>
#include<iostream>
using namespace std;
int main()
{
    vector<int>v1;
    for(int i=0; i<5; i++)
        v1.push_back(i*2);
    for(int i=0; i<v1.size(); i++)
        cout<<v1[i];    //02468
    reverse(v1.begin(),v1.end());
    
    for(int i=0; i<v1.size(); i++)
        cout<<v1[i];   //86420
}

Angular error: "Can't bind to 'ngModel' since it isn't a known property of 'input'"

import form module in app.module.ts.

import { FormsModule} from '@angular/forms';


@NgModule({
  declarations: [
    AppComponent,
    ContactsComponent
  ],
  imports: [
    BrowserModule,HttpModule,FormsModule     //Add here form  module
  ],
  providers: [],
  bootstrap: [AppComponent]
})

In html:

<input type="text" name="last_name" [(ngModel)]="last_name" [ngModelOptions]="{standalone: true}" class="form-control">

How do I return multiple values from a function in C?

By passing parameters by reference to function.

Examples:

 void incInt(int *y)
 {
     (*y)++;  // Increase the value of 'x', in main, by one.
 }

Also by using global variables but it is not recommended.

Example:

int a=0;

void main(void)
{
    //Anything you want to code.
}

asp.net mvc3 return raw html to view

Give a try to return bootstrap alert message, this worked for me

return Content("<div class='alert alert-success'><a class='close' data-dismiss='alert'>
&times;</a><strong style='width:12px'>Thanks!</strong> updated successfully</div>");

Note: Don't forget to add bootstrap css and js in your view page

hope helps someone.

Converting NumPy array into Python List structure?

c = np.array([[1,2,3],[4,5,6]])

list(c.flatten())

Looping through JSON with node.js

I would recommend taking advantage of the fact that nodeJS will always be ES5. Remember this isn't the browser folks you can depend on the language's implementation on being stable. That said I would recommend against ever using a for-in loop in nodeJS, unless you really want to do deep recursion up the prototype chain. For simple, traditional looping I would recommend making good use of Object.keys method, in ES5. If you view the following JSPerf test, especially if you use Chrome (since it has the same engine as nodeJS), you will get a rough idea of how much more performant using this method is than using a for-in loop (roughly 10 times faster). Here's a sample of the code:

 var keys = Object.keys( obj );
 for( var i = 0,length = keys.length; i < length; i++ ) {
     obj[ keys[ i ] ];
 }

Make text wrap in a cell with FPDF?

Text Wrap:

The MultiCell is used for print text with multiple lines. It has the same atributes of Cell except for ln and link.

$pdf->MultiCell( 200, 40, $reportSubtitle, 1);

Line Height:

What multiCell does is to spread the given text into multiple cells, this means that the second parameter defines the height of each line (individual cell) and not the height of all cells (collectively).

MultiCell(float w, float h, string txt [, mixed border [, string align [, boolean fill]]])

You can read the full documentation here.

Address already in use: JVM_Bind

My answer does 100% fit to this problem, but I want to document my solution and the trap behind it, since the Exception is the same.

My port was always in use testing a Jetty in a Junit testcase. Problem was Google's code pro on Eclipse, which, I guess, was testing in the background and thus starting jetty before me all the time. Workaround: let Eclipse open *.java files always w/ the Java editor instead of Google's Junit editor. That seems to help.

Returning multiple values from a C++ function

Personally, I generally dislike return parameters for a number of reasons:

  • it is not always obvious in the invocation which parameters are ins and which are outs
  • you generally have to create a local variable to catch the result, while return values can be used inline (which may or may not be a good idea, but at least you have the option)
  • it seems cleaner to me to have an "in door" and an "out door" to a function -- all the inputs go in here, all the outputs come out there
  • I like to keep my argument lists as short as possible

I also have some reservations about the pair/tuple technique. Mainly, there is often no natural order to the return values. How is the reader of the code to know whether result.first is the quotient or the remainder? And the implementer could change the order, which would break existing code. This is especially insidious if the values are the same type so that no compiler error or warning would be generated. Actually, these arguments apply to return parameters as well.

Here's another code example, this one a bit less trivial:

pair<double,double> calculateResultingVelocity(double windSpeed, double windAzimuth,
                                               double planeAirspeed, double planeCourse);

pair<double,double> result = calculateResultingVelocity(25, 320, 280, 90);
cout << result.first << endl;
cout << result.second << endl;

Does this print groundspeed and course, or course and groundspeed? It's not obvious.

Compare to this:

struct Velocity {
    double speed;
    double azimuth;
};
Velocity calculateResultingVelocity(double windSpeed, double windAzimuth,
                                    double planeAirspeed, double planeCourse);

Velocity result = calculateResultingVelocity(25, 320, 280, 90);
cout << result.speed << endl;
cout << result.azimuth << endl;

I think this is clearer.

So I think my first choice in general is the struct technique. The pair/tuple idea is likely a great solution in certain cases. I'd like to avoid the return parameters when possible.

Case insensitive regular expression without re.compile?

In imports

import re

In run time processing:

RE_TEST = r'test'
if re.match(RE_TEST, 'TeSt', re.IGNORECASE):

It should be mentioned that not using re.compile is wasteful. Every time the above match method is called, the regular expression will be compiled. This is also faulty practice in other programming languages. The below is the better practice.

In app initialization:

self.RE_TEST = re.compile('test', re.IGNORECASE)

In run time processing:

if self.RE_TEST.match('TeSt'):

Warning: X may be used uninitialized in this function

When you use Vector *one you are merely creating a pointer to the structure but there is no memory allocated to it.

Simply use one = (Vector *)malloc(sizeof(Vector)); to declare memory and instantiate it.

Turn off constraints temporarily (MS SQL)

Disabling and Enabling All Foreign Keys

CREATE PROCEDURE pr_Disable_Triggers_v2
    @disable BIT = 1
AS
    DECLARE @sql VARCHAR(500)
        ,   @tableName VARCHAR(128)
        ,   @tableSchema VARCHAR(128)

    -- List of all tables
    DECLARE triggerCursor CURSOR FOR
        SELECT  t.TABLE_NAME AS TableName
            ,   t.TABLE_SCHEMA AS TableSchema
        FROM    INFORMATION_SCHEMA.TABLES t
        ORDER BY t.TABLE_NAME, t.TABLE_SCHEMA

    OPEN    triggerCursor
    FETCH NEXT FROM triggerCursor INTO @tableName, @tableSchema
    WHILE ( @@FETCH_STATUS = 0 )
    BEGIN

        SET @sql = 'ALTER TABLE ' + @tableSchema + '.[' + @tableName + '] '
        IF @disable = 1
            SET @sql = @sql + ' DISABLE TRIGGER ALL'
        ELSE
            SET @sql = @sql + ' ENABLE TRIGGER ALL'

        PRINT 'Executing Statement - ' + @sql
        EXECUTE ( @sql )

        FETCH NEXT FROM triggerCursor INTO @tableName, @tableSchema

    END

    CLOSE triggerCursor
    DEALLOCATE triggerCursor

First, the foreignKeyCursor cursor is declared as the SELECT statement that gathers the list of foreign keys and their table names. Next, the cursor is opened and the initial FETCH statement is executed. This FETCH statement will read the first row's data into the local variables @foreignKeyName and @tableName. When looping through a cursor, you can check the @@FETCH_STATUS for a value of 0, which indicates that the fetch was successful. This means the loop will continue to move forward so it can get each successive foreign key from the rowset. @@FETCH_STATUS is available to all cursors on the connection. So if you are looping through multiple cursors, it is important to check the value of @@FETCH_STATUS in the statement immediately following the FETCH statement. @@FETCH_STATUS will reflect the status for the most recent FETCH operation on the connection. Valid values for @@FETCH_STATUS are:

0 = FETCH was successful
-1 = FETCH was unsuccessful
-2 = the row that was fetched is missing

Inside the loop, the code builds the ALTER TABLE command differently depending on whether the intention is to disable or enable the foreign key constraint (using the CHECK or NOCHECK keyword). The statement is then printed as a message so its progress can be observed and then the statement is executed. Finally, when all rows have been iterated through, the stored procedure closes and deallocates the cursor.

see Disabling Constraints and Triggers from MSDN Magazine

How to find all the dependencies of a table in sql server

Finding all foreign keys

SELECT src.name, srcCol.name, dst.name, dstCol.name
FROM sys.foreign_key_columns fk
    INNER JOIN sys.columns srcCol ON fk.parent_column_id = srcCol.[column_id] 
        AND fk.parent_object_id = srcCol.[object_id]
    INNER JOIN sys.tables src ON src.[object_id] = fk.parent_object_id
    INNER JOIN sys.tables dst ON dst.[object_id] = fk.[referenced_object_id]
    INNER JOIN sys.columns dstCol ON fk.referenced_column_id = dstCol.[column_id] 
        AND fk.[referenced_object_id] = dstCol.[object_id]

Save current directory in variable using Bash?

Your assignment has an extra $:

export PATH=$PATH:${PWD}:/foo/bar

Checking character length in ruby

I think you could just use the String#length method...

http://ruby-doc.org/core-1.9.3/String.html#method-i-length

Example:

text = 'The quick brown fox jumps over the lazy dog.'
puts text.length > 25 ? 'Too many characters' : 'Accepted'

MySQL Trigger - Storing a SELECT in a variable

CREATE TRIGGER clearcamcdr AFTER INSERT ON `asteriskcdrdb`.`cdr` 
FOR EACH ROW
BEGIN
  SET @INC = (SELECT sip_inc FROM trunks LIMIT 1);
  IF NEW.billsec >1 AND NEW.channel LIKE @INC 
    AND NEW.dstchannel NOT LIKE "" 
  THEN
    insert into `asteriskcdrdb`.`filtre` (id_appel,date_appel,source,destinataire,duree,sens,commentaire,suivi) 
      values (NEW.id,NEW.calldate,NEW.src,NEW.dstchannel,NEW.billsec,"entrant","",""); 
  END IF;
END$$

Dont try this @ home

Stylesheet not loaded because of MIME-type

I know it might be out of context but linking a non existed file might cause this issue as it happened to me before.

<!-- bootstrap grid -->
<link rel="stylesheet" href="./css/bootstrap-grid.css" />

If this file does not exist you will face that issue.

How do I access my SSH public key?

cat ~/.ssh/id_rsa.pub or cat ~/.ssh/id_dsa.pub

You can list all the public keys you have by doing:

$ ls ~/.ssh/*.pub

Max length UITextField

func checkMaxLength(textField: UITextField!, maxLength: Int) {
        if (textField.text!.characters.count > maxLength) {
            textField.deleteBackward()
        }
}

a small change for IOS 9

Check if multiple strings exist in another string

flog = open('test.txt', 'r')
flogLines = flog.readlines()
strlist = ['SUCCESS', 'Done','SUCCESSFUL']
res = False
for line in flogLines:
     for fstr in strlist:
         if line.find(fstr) != -1:
            print('found') 
            res = True


if res:
    print('res true')
else: 
    print('res false')

output example image

How to Ignore "Duplicate Key" error in T-SQL (SQL Server)

I think you are looking for the IGNORE_DUP_KEY option on your index. Have a look at IGNORE_DUP_KEY ON option documented at http://msdn.microsoft.com/en-us/library/ms186869.aspx which causes duplicate insertion attempts to produce a warning instead of an error.

How to print a percentage value in python?

Then you'd want to do this instead:

print str(int(1.0/3.0*100))+'%'

The .0 denotes them as floats and int() rounds them to integers afterwards again.

What is the best project structure for a Python application?

According to Jean-Paul Calderone's Filesystem structure of a Python project:

Project/
|-- bin/
|   |-- project
|
|-- project/
|   |-- test/
|   |   |-- __init__.py
|   |   |-- test_main.py
|   |   
|   |-- __init__.py
|   |-- main.py
|
|-- setup.py
|-- README

Getting "Lock wait timeout exceeded; try restarting transaction" even though I'm not using a transaction

The number of rows is not huge... Create an index on account_import_id if its not the primary key.

CREATE INDEX idx_customer_account_import_id ON customer (account_import_id);

How to add /usr/local/bin in $PATH on Mac

I've had the same problem with you.

cd to ../etc/ then use ls to make sure your "paths" file is in , vim paths, add "/usr/local/bin" at the end of the file.

Using If/Else on a data frame

Try this

frame$twohouses <- ifelse(frame$data>1, 2, 1)
 frame
   data twohouses
1     0         1
2     1         1
3     2         2
4     3         2
5     4         2
6     2         2
7     3         2
8     1         1
9     4         2
10    3         2
11    2         2
12    4         2
13    0         1
14    1         1
15    2         2
16    0         1
17    2         2
18    1         1
19    2         2
20    0         1
21    4         2

How to remove all duplicate items from a list

for unhashable lists. It is faster as it does not iterate about already checked entries.

def purge_dublicates(X):
    unique_X = []
    for i, row in enumerate(X):
        if row not in X[i + 1:]:
            unique_X.append(row)
    return unique_X

JQuery, select first row of table

This is a better solution, using:

$("table tr:first-child").has('img')

Genymotion error at start 'Unable to load virtualbox'

I have spend all day to solve this error since none of the answers worked for me.

I found out that oracle virtual box doesn't install the network adapter correctly in windows 8.1

Solution:

  1. Delete all previous virtual box adapters
  2. Go to device manager and click "Action" > "Add legacy hardware"
  3. Install the oracle virtual box adapters manually (my path was C:\Program Files\Oracle\VirtualBox\drivers\network\netadp\VBoxNetAdp.inf)

Now that virtual box adapters is installed correctly, it needs to be setup correctly. (the following solution is like many other solution in here)

  1. Start Oracle VM VirtualBox and go to "File" > "Preferences" > "Network" > "Host-only Network"
  2. Click edit
  3. Set IPv4 192.168.56.1 mask 255.255.255.0
  4. Click DHCP Server tab and set server adr: 192.168.56.100 server Mask: 255.255.255.0 low address bound: 192.168.56.101 upper adress bound 192.168.56.254
  5. Now click OK and start genymotion

Find size of Git repository

You could use git-sizer. In the --verbose setting, the example output is (below). Look for the Total size of files line.

$ git-sizer --verbose
Processing blobs: 1652370
Processing trees: 3396199
Processing commits: 722647
Matching commits to trees: 722647
Processing annotated tags: 534
Processing references: 539
| Name                         | Value     | Level of concern               |
| ---------------------------- | --------- | ------------------------------ |
| Overall repository size      |           |                                |
| * Commits                    |           |                                |
|   * Count                    |   723 k   | *                              |
|   * Total size               |   525 MiB | **                             |
| * Trees                      |           |                                |
|   * Count                    |  3.40 M   | **                             |
|   * Total size               |  9.00 GiB | ****                           |
|   * Total tree entries       |   264 M   | *****                          |
| * Blobs                      |           |                                |
|   * Count                    |  1.65 M   | *                              |
|   * Total size               |  55.8 GiB | *****                          |
| * Annotated tags             |           |                                |
|   * Count                    |   534     |                                |
| * References                 |           |                                |
|   * Count                    |   539     |                                |
|                              |           |                                |
| Biggest objects              |           |                                |
| * Commits                    |           |                                |
|   * Maximum size         [1] |  72.7 KiB | *                              |
|   * Maximum parents      [2] |    66     | ******                         |
| * Trees                      |           |                                |
|   * Maximum entries      [3] |  1.68 k   | *                              |
| * Blobs                      |           |                                |
|   * Maximum size         [4] |  13.5 MiB | *                              |
|                              |           |                                |
| History structure            |           |                                |
| * Maximum history depth      |   136 k   |                                |
| * Maximum tag depth      [5] |     1     |                                |
|                              |           |                                |
| Biggest checkouts            |           |                                |
| * Number of directories  [6] |  4.38 k   | **                             |
| * Maximum path depth     [7] |    13     | *                              |
| * Maximum path length    [8] |   134 B   | *                              |
| * Number of files        [9] |  62.3 k   | *                              |
| * Total size of files    [9] |   747 MiB |                                |
| * Number of symlinks    [10] |    40     |                                |
| * Number of submodules       |     0     |                                |

[1]  91cc53b0c78596a73fa708cceb7313e7168bb146
[2]  2cde51fbd0f310c8a2c5f977e665c0ac3945b46d
[3]  4f86eed5893207aca2c2da86b35b38f2e1ec1fc8 (refs/heads/master:arch/arm/boot/dts)
[4]  a02b6794337286bc12c907c33d5d75537c240bd0 (refs/heads/master:drivers/gpu/drm/amd/include/asic_reg/vega10/NBIO/nbio_6_1_sh_mask.h)
[5]  5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c (refs/tags/v2.6.11)
[6]  1459754b9d9acc2ffac8525bed6691e15913c6e2 (589b754df3f37ca0a1f96fccde7f91c59266f38a^{tree})
[7]  78a269635e76ed927e17d7883f2d90313570fdbc (dae09011115133666e47c35673c0564b0a702db7^{tree})
[8]  ce5f2e31d3bdc1186041fdfd27a5ac96e728f2c5 (refs/heads/master^{tree})
[9]  532bdadc08402b7a72a4b45a2e02e5c710b7d626 (e9ef1fe312b533592e39cddc1327463c30b0ed8d^{tree})
[10] f29a5ea76884ac37e1197bef1941f62fda3f7b99 (f5308d1b83eba20e69df5e0926ba7257c8dd9074^{tree})

How to create a JQuery Clock / Timer

If you can use jQuery with Moment.js (great library), this is the way:

var crClockInit1 = null;
var crClockInterval = null;
function crInitClock() {
    crClockInit1 = setInterval(function() {
        if (moment().format("SSS") <= 40) {
            clearInterval(crClockInit1);
            crStartClockNow();
        }
    }, 30);
}

function crStartClockNow() {
    crClockInterval = setInterval(function() {
        $('#clock').html(moment().format('D. MMMM YYYY H:mm:ss'));
    }, 1000);
}

Start clock initialization with crInitClock(). It's done this way to synchronize seconds. Without synchronization, you would start 1 second timer in half of second and it will be half second late after real time.

OpenSSL Verify return code: 20 (unable to get local issuer certificate)

put your CA & root certificate in /usr/share/ca-certificate or /usr/local/share/ca-certificate. Then

dpkg-reconfigure ca-certificates

or even reinstall ca-certificate package with apt-get.

After doing this your certificate is collected into system's DB: /etc/ssl/certs/ca-certificates.crt

Then everything should be fine.

How can I programmatically freeze the top row of an Excel worksheet in Excel 2007 VBA?

The problem with the recorded macro is the same as the problem with the built-in action: Excel chooses to freeze the top visible row, rather than the actual top row where the header information can be found.

The purpose of a macro in this case is to freeze the actual top row. When I am viewing row #405592 and I need to check the header for the column (because I forgot to freeze rows when I opened the file), I have to scroll to the top, freeze the top row, then find my way back to row #405592 again. Since I believe this is stupid behavior, I want a macro to correct it, but, like I said, the recorded macro just mimics the same stupid behavior.

I am using Office 2011 for Mac OS X Lion

Update (2 minutes later):

I found a solution here: http://www.ozgrid.com/forum/showthread.php?t=19692

Dim r As Range 
Set r = ActiveCell 
Range("A2").Select 
With ActiveWindow 
    .FreezePanes = False 
    .ScrollRow = 1 
    .ScrollColumn = 1 
    .FreezePanes = True 
    .ScrollRow = r.Row 
End With 
r.Select 

Tomcat: How to find out running tomcat version

Open your tomcat home page (Usually localhost:8080)

You will see something like this:

enter image description here

How do I create a file AND any folders, if the folders don't exist?

To summarize what has been commented in other answers:

//path = @"C:\Temp\Bar\Foo\Test.txt";
Directory.CreateDirectory(Path.GetDirectoryName(path));

Directory.CreateDirectory will create the directories recursively and if the directory already exist it will return without an error.

If there happened to be a file Foo at C:\Temp\Bar\Foo an exception will be thrown.

Naming returned columns in Pandas aggregate function?

This will drop the outermost level from the hierarchical column index:

df = data.groupby(...).agg(...)
df.columns = df.columns.droplevel(0)

If you'd like to keep the outermost level, you can use the ravel() function on the multi-level column to form new labels:

df.columns = ["_".join(x) for x in df.columns.ravel()]

For example:

import pandas as pd
import pandas.rpy.common as com
import numpy as np

data = com.load_data('Loblolly')
print(data.head())
#     height  age Seed
# 1     4.51    3  301
# 15   10.89    5  301
# 29   28.72   10  301
# 43   41.74   15  301
# 57   52.70   20  301

df = data.groupby('Seed').agg(
    {'age':['sum'],
     'height':['mean', 'std']})
print(df.head())
#       age     height           
#       sum        std       mean
# Seed                           
# 301    78  22.638417  33.246667
# 303    78  23.499706  34.106667
# 305    78  23.927090  35.115000
# 307    78  22.222266  31.328333
# 309    78  23.132574  33.781667

df.columns = df.columns.droplevel(0)
print(df.head())

yields

      sum        std       mean
Seed                           
301    78  22.638417  33.246667
303    78  23.499706  34.106667
305    78  23.927090  35.115000
307    78  22.222266  31.328333
309    78  23.132574  33.781667

Alternatively, to keep the first level of the index:

df = data.groupby('Seed').agg(
    {'age':['sum'],
     'height':['mean', 'std']})
df.columns = ["_".join(x) for x in df.columns.ravel()]

yields

      age_sum   height_std  height_mean
Seed                           
301        78    22.638417    33.246667
303        78    23.499706    34.106667
305        78    23.927090    35.115000
307        78    22.222266    31.328333
309        78    23.132574    33.781667

How can I replace the deprecated set_magic_quotes_runtime in php?

add these code into the top of your script to solve problem

@set_magic_quotes_runtime(false);
ini_set('magic_quotes_runtime', 0);

Jquery click event not working after append method

The .on() method is used to delegate events to elements, dynamically added or already present in the DOM:

_x000D_
_x000D_
// STATIC-PARENT              on  EVENT    DYNAMIC-CHILD_x000D_
$('#registered_participants').on('click', '.new_participant_form', function() {_x000D_
_x000D_
  var $td = $(this).closest('tr').find('td');_x000D_
  var part_name = $td.eq(1).text();_x000D_
  console.log( part_name );_x000D_
_x000D_
});_x000D_
_x000D_
_x000D_
$('#add_new_participant').click(function() {_x000D_
_x000D_
  var first_name = $.trim( $('#f_name_participant').val() );_x000D_
  var last_name  = $.trim( $('#l_name_participant').val() );_x000D_
  var role       = $('#new_participant_role').val();_x000D_
  var email      = $('#email_participant').val();_x000D_
  _x000D_
  if(!first_name && !last_name) return;_x000D_
_x000D_
  $('#registered_participants').append('<tr><td><a href="#" class="new_participant_form">Participant Registration</a></td><td>' + first_name + ' ' + last_name + '</td><td>' + role + '</td><td>0% done</td></tr>');_x000D_
_x000D_
});
_x000D_
<table id="registered_participants" class="tablesorter">_x000D_
  <thead>_x000D_
    <tr>_x000D_
      <th>Form</th>_x000D_
      <th>Name</th>_x000D_
      <th>Role</th>_x000D_
      <th>Progress </th>_x000D_
    </tr>_x000D_
  </thead>_x000D_
  <tbody>_x000D_
    <tr>_x000D_
      <td><a href="#" class="new_participant_form">Participant Registration</a></td>_x000D_
      <td>Smith Johnson</td>_x000D_
      <td>Parent</td>_x000D_
      <td>60% done</td>_x000D_
    </tr>_x000D_
  </tbody>_x000D_
</table>_x000D_
_x000D_
<input type="text" id="f_name_participant" placeholder="Name">_x000D_
<input type="text" id="l_name_participant" placeholder="Surname">_x000D_
<select id="new_participant_role">_x000D_
  <option>Parent</option>_x000D_
  <option>Child</option>_x000D_
</select>_x000D_
<button id="add_new_participant">Add New Entry</button>_x000D_
_x000D_
<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
_x000D_
_x000D_
_x000D_

Read more: http://api.jquery.com/on/

What is the newline character in the C language: \r or \n?

What is the newline character in the C language: \r or \n?

The new-line may be thought of a some char and it has the value of '\n'. C11 5.2.1

This C new-line comes up in 3 places: C source code, as a single char and as an end-of-line in file I/O when in text mode.

  1. Many compilers will treat source text as ASCII. In that case, codes 10, sometimes 13, and sometimes paired 13,10 as new-line for source code. Had the source code been in another character set, different codes may be used. This new-line typically marks the end of a line of source code (actually a bit more complicated here), // comment, and # directives.

  2. In source code, the 2 characters \ and n represent the char new-line as \n. If ASCII is used, this char would have the value of 10.

  3. In file I/O, in text mode, upon reading the bytes of the input file (and stdin), depending on the environment, when bytes with the value(s) of 10 (Unix), 13,10, (*1) (Windows), 13 (Old Mac??) and other variations are translated in to a '\n'. Upon writing a file (or stdout), the reverse translation occurs.
    Note: File I/O in binary mode makes no translation.

The '\r' in source code is the carriage return char.

(*1) A lone 13 and/or 10 may also translate into \n.

Windows: XAMPP vs WampServer vs EasyPHP vs alternative

I'm using EasyPHP in making my Thesis about Content Management System. So far, this tool is very good and easy to use.

Download TS files from video stream

1) Please read instructions by @aalhanane (after "paste URL m3u8" step you have to type name for the file, eg "video" then click on "hand" icon next to "quality" and only after that you should select "one on one" and "download").

2) The stream splits video and audio, so you need to download them separately and then use the same m3u8x to join them https://youtu.be/he-tDNiVl2M (optionally convert to mp4).

3) m3u8x can download video without any issues but in my case it cannot extract audio links. So I simply downloaded the *.m3u8 file and searched for line which contains GROUP-ID="audio-0" and then scroll right and copied the link (!including token!) and paste it straight into "Quality URL" field of m3u8x app. Then "one on one" and download it similar to video stream.

Once I had both video and audio, I joined and success =)

p.s. in case automatic extraction will stop working in the future, you can use the same method to extract video links manually.

Get last n lines of a file, similar to tail

Simple :

with open("test.txt") as f:
data = f.readlines()
tail = data[-2:]
print(''.join(tail)

Combine two columns of text in pandas dataframe

Here is my summary of the above solutions to concatenate / combine two columns with int and str value into a new column, using a separator between the values of columns. Three solutions work for this purpose.

# be cautious about the separator, some symbols may cause "SyntaxError: EOL while scanning string literal".
# e.g. ";;" as separator would raise the SyntaxError

separator = "&&" 

# pd.Series.str.cat() method does not work to concatenate / combine two columns with int value and str value. This would raise "AttributeError: Can only use .cat accessor with a 'category' dtype"

df["period"] = df["Year"].map(str) + separator + df["quarter"]
df["period"] = df[['Year','quarter']].apply(lambda x : '{} && {}'.format(x[0],x[1]), axis=1)
df["period"] = df.apply(lambda x: f'{x["Year"]} && {x["quarter"]}', axis=1)

Linux: where are environment variables stored?

Type "set" and you will get a list of all the current variables. If you want something to persist put it in ~/.bashrc or ~/.bash_profile (if you're using bash)

scatter plot in matplotlib

Maybe something like this:

import matplotlib.pyplot
import pylab

x = [1,2,3,4]
y = [3,4,8,6]

matplotlib.pyplot.scatter(x,y)

matplotlib.pyplot.show()

EDIT:

Let me see if I understand you correctly now:

You have:

       test1 | test2 | test3
test3 |   1   |   0  |  1

test4 |   0   |   1  |  0

test5 |   1   |   1  |  0

Now you want to represent the above values in in a scatter plot, such that value of 1 is represented by a dot.

Let's say you results are stored in a 2-D list:

results = [[1, 0, 1], [0, 1, 0], [1, 1, 0]]

We want to transform them into two variables so we are able to plot them.

And I believe this code will give you what you are looking for:

import matplotlib
import pylab


results = [[1, 0, 1], [0, 1, 0], [1, 1, 0]]

x = []
y = []

for ind_1, sublist in enumerate(results):
    for ind_2, ele in enumerate(sublist):
        if ele == 1:
            x.append(ind_1)
            y.append(ind_2)       


matplotlib.pyplot.scatter(x,y)

matplotlib.pyplot.show()

Notice that I do need to import pylab, and you would have play around with the axis labels. Also this feels like a work around, and there might be (probably is) a direct method to do this.

How to place a JButton at a desired location in a JFrame using Java

Following line should be called before you add your component

pnlButton.setLayout(null);

Above will set your content panel to use absolute layout. This means you'd always have to set your component's bounds explicitly by using setBounds method.

In general I wouldn't recommend using absolute layout.

How to display a date as iso 8601 format with PHP

The second argument of date is a UNIX timestamp, not a database timestamp string.

You need to convert your database timestamp with strtotime.

<?= date("c", strtotime($post[3])) ?>

Does Python have a ternary conditional operator?

For versions prior to 2.5, there's the trick:

[expression] and [on_true] or [on_false]

It can give wrong results when on_true has a false boolean value.1
Although it does have the benefit of evaluating expressions left to right, which is clearer in my opinion.

1. Is there an equivalent of C’s ”?:” ternary operator?

How to show soft-keyboard when edittext is focused

According to this answer I used the setSoftInputMode method and overrided theese methods in DialogFragment:

@Override
public void onCancel(@NonNull DialogInterface dialog) {
    super.onCancel(dialog);
    requireDialog().getWindow().setSoftInputMode(InputMethodManager.HIDE_IMPLICIT_ONLY);
}

@Override
public void onStart() {
    super.onStart();
    requireDialog().getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
}

@Override
public void onStop() {
    super.onStop();
    requireDialog().getWindow().setSoftInputMode(InputMethodManager.HIDE_IMPLICIT_ONLY);
}

I also made my own subclass of DialogFragment with theese methods, so when you create another dialog and inherit from this class, you have the soft keyboard showed automatically without any other edits. Hope it will be useful for someone.

Css Move element from left to right animated

It's because you aren't giving the un-hovered state a right attribute.

right isn't set so it's trying to go from nothing to 0px. Obviously because it has nothing to go to, it just 'warps' over.

If you give the unhovered state a right:90%;, it will transition how you like.

Just as a side note, if you still want it to be on the very left of the page, you can use the calc css function.

Example:

right: calc(100% - 100px)
                     ^ width of div

You don't have to use left then.

Also, you can't transition using left or right auto and will give the same 'warp' effect.

_x000D_
_x000D_
div {_x000D_
    width:100px;_x000D_
    height:100px;_x000D_
    background:red;_x000D_
    transition:2s;_x000D_
    -webkit-transition:2s;_x000D_
    -moz-transition:2s;_x000D_
    position:absolute;_x000D_
    right:calc(100% - 100px);_x000D_
}_x000D_
div:hover {_x000D_
  right:0;_x000D_
}
_x000D_
<p>_x000D_
  <b>Note:</b> This example does not work in Internet Explorer 9 and earlier versions._x000D_
</p>_x000D_
<div></div>_x000D_
<p>Hover over the red square to see the transition effect.</p>
_x000D_
_x000D_
_x000D_

CanIUse says that the calc() function only works on IE10+

How to get the type of T from a member of a generic class or method?

Consider this: I use it to export 20 typed list by same way:

private void Generate<T>()
{
    T item = (T)Activator.CreateInstance(typeof(T));

    ((T)item as DemomigrItemList).Initialize();

    Type type = ((T)item as DemomigrItemList).AsEnumerable().FirstOrDefault().GetType();
    if (type == null) return;
    if (type != typeof(account)) //account is listitem in List<account>
    {
        ((T)item as DemomigrItemList).CreateCSV(type);
    }
}

Item frequency count in Python

defaultdict to the rescue!

from collections import defaultdict

words = "apple banana apple strawberry banana lemon"

d = defaultdict(int)
for word in words.split():
    d[word] += 1

This runs in O(n).

Copying files into the application folder at compile time

You can use the PostBuild event of the project. After the build is completed, you can run a DOS batch file and copy the desired files to your desired folder.

Should I test private methods or only public ones?

I've been stewing over this issue for a while especially with trying my hand at TDD.

I've come across two posts that I think address this problem thoroughly enough in the case of TDD.

  1. Testing private methods, TDD and Test-Driven Refactoring
  2. Test-Driven Development Isn’t Testing

In Summary:

  • When using test driven development (design) techniques, private methods should arise only during the re-factoring process of already working and tested code.

  • By the very nature of the process, any bit of simple implementation functionality extracted out of a thoroughly tested function will be it self tested (i.e. indirect testing coverage).

To me it seems clear enough that in the beginning part of coding most methods will be higher level functions because they are encapsulating/describing the design.

Therefore, these methods will be public and testing them will be easy enough.

The private methods will come later once everything is working well and we are re factoring for the sake of readability and cleanliness.

Autoincrement VersionCode with gradle extra properties

Here comes a modernization of my previous answer which can be seen below. This one is running with Gradle 4.4 and Android Studio 3.1.1.

What this script does:

  • Creates a version.properties file if none exists (up vote Paul Cantrell's answer below, which is where I got the idea from if you like this answer)
  • For each build, debug release or any time you press the run button in Android Studio the VERSION_BUILD number increases.
  • Every time you assemble a release your Android versionCode for the play store increases and your patch number increases.
  • Bonus: After the build is done copies your apk to projectDir/apk to make it more accessible.

This script will create a version number which looks like v1.3.4 (123) and build an apk file like AppName-v1.3.4.apk.

Major version ?       ? Build version
             v1.3.4 (123)
  Minor version ^|^ Patch version

Major version: Has to be changed manually for bigger changes.

Minor version: Has to be changed manually for slightly less big changes.

Patch version: Increases when running gradle assembleRelease

Build version: Increases every build

Version Number: Same as Patch version, this is for the version code which Play Store needs to have increased for each new apk upload.

Just change the content in the comments labeled 1 - 3 below and the script should do the rest. :)

android {
    compileSdkVersion 27
    buildToolsVersion '27.0.3'

    def versionPropsFile = file('version.properties')
    def value = 0
    Properties versionProps = new Properties()
    if (!versionPropsFile.exists()) {
        versionProps['VERSION_PATCH'] = "0"
        versionProps['VERSION_NUMBER'] = "0"
        versionProps['VERSION_BUILD'] = "-1" // I set it to minus one so the first build is 0 which isn't super important. 
        versionProps.store(versionPropsFile.newWriter(), null)
    }

    def runTasks = gradle.startParameter.taskNames
    if ('assembleRelease' in runTasks) {
        value = 1
    }

    def mVersionName = ""
    def mFileName = ""

    if (versionPropsFile.canRead()) {
        versionProps.load(new FileInputStream(versionPropsFile))

        versionProps['VERSION_PATCH'] = (versionProps['VERSION_PATCH'].toInteger() + value).toString()
        versionProps['VERSION_NUMBER'] = (versionProps['VERSION_NUMBER'].toInteger() + value).toString()
        versionProps['VERSION_BUILD'] = (versionProps['VERSION_BUILD'].toInteger() + 1).toString()

        versionProps.store(versionPropsFile.newWriter(), null)

        // 1: change major and minor version here
        mVersionName = "v1.0.${versionProps['VERSION_PATCH']}"
        // 2: change AppName for your app name
        mFileName = "AppName-${mVersionName}.apk"

        defaultConfig {
            minSdkVersion 21
            targetSdkVersion 27
            applicationId "com.example.appname" // 3: change to your package name
            versionCode versionProps['VERSION_NUMBER'].toInteger()
            versionName "${mVersionName} Build: ${versionProps['VERSION_BUILD']}"
        }

    } else {
        throw new FileNotFoundException("Could not read version.properties!")
    }

    if ('assembleRelease' in runTasks) {
        applicationVariants.all { variant ->
            variant.outputs.all { output ->
                if (output.outputFile != null && output.outputFile.name.endsWith('.apk')) {
                    outputFileName = mFileName
                }
            }
        }
    }

    task copyApkFiles(type: Copy){
        from 'build/outputs/apk/release'
        into '../apk'
        include mFileName
    }

    afterEvaluate {
        assembleRelease.doLast {
            tasks.copyApkFiles.execute()
        }
    }

    signingConfigs {
        ...
    }

    buildTypes {
        ...
    }
}

====================================================

INITIAL ANSWER:

I want the versionName to increase automatically as well. So this is just an addition to the answer by CommonsWare which worked perfectly for me. This is what works for me

defaultConfig {
    versionCode code
    versionName "1.1." + code
    minSdkVersion 14
    targetSdkVersion 18
}

EDIT:

As I am a bit lazy I want my versioning to work as automatically as possible. What I want is to have a Build Version that increases with each build, while the Version Number and Version Name only increases when I make a release build.

This is what I have been using for the past year, the basics are from CommonsWare's answer and my previous answer, plus some more. This results in the following versioning:

Version Name: 1.0.5 (123) --> Major.Minor.Patch (Build), Major and Minor are changed manually.

In build.gradle:

...
android {
    compileSdkVersion 23
    buildToolsVersion '23.0.1'
    def versionPropsFile = file('version.properties')
    if (versionPropsFile.canRead()) {
        def Properties versionProps = new Properties()

        versionProps.load(new FileInputStream(versionPropsFile))

        def value = 0

        def runTasks = gradle.startParameter.taskNames
        if ('assemble' in runTasks || 'assembleRelease' in runTasks || 'aR' in runTasks) {
            value = 1;
        }

        def versionMajor = 1
        def versionMinor = 0
        def versionPatch = versionProps['VERSION_PATCH'].toInteger() + value
        def versionBuild = versionProps['VERSION_BUILD'].toInteger() + 1
        def versionNumber = versionProps['VERSION_NUMBER'].toInteger() + value

        versionProps['VERSION_PATCH'] = versionPatch.toString()
        versionProps['VERSION_BUILD'] = versionBuild.toString()
        versionProps['VERSION_NUMBER'] = versionNumber.toString()

        versionProps.store(versionPropsFile.newWriter(), null)

        defaultConfig {
            versionCode versionNumber
            versionName "${versionMajor}.${versionMinor}.${versionPatch} (${versionBuild}) Release"
            minSdkVersion 14
            targetSdkVersion 23
        }

        applicationVariants.all { variant ->
            variant.outputs.each { output ->
                def fileNaming = "apk/RELEASES"
                variant.outputs.each { output ->
                    def outputFile = output.outputFile
                    if (outputFile != null && outputFile.name.endsWith('.apk')) {
                        output.outputFile = new File(getProject().getRootDir(), "${fileNaming}-${versionMajor}.${versionMinor}.${versionPatch}-${outputFile.name}")
                    }
                }
            }
        }

    } else {
        throw new GradleException("Could not read version.properties!")
    }

    ...
}

...

Patch and versionCode is increased if you assemble your project through the terminal with 'assemble', 'assembleRelease' or 'aR' which creates a new folder in your project root called apk/RELEASE so you don't have to look through build/outputs/more/more/more to find your apk.

Your version properties would need to look like this:

VERSION_NUMBER=1
VERSION_BUILD=645
VERSION_PATCH=1

Obviously start with 0. :)

How to get a list of all valid IP addresses in a local network?

Install nmap,

sudo apt-get install nmap

then

nmap -sP 192.168.1.*

or more commonly

nmap -sn 192.168.1.0/24

will scan the entire .1 to .254 range

This does a simple ping scan in the entire subnet to see which hosts are online.

How do you add an image?

The other option to try is a straightforward

<img width="100" height="100" src="/root/Image/image.jpeg" class="CalloutRightPhoto"/>

i.e. without {} but instead giving the direct image path

How to stretch a fixed number of horizontal navigation items evenly and fully across a specified container

if you can, use flexbox:

<ul>
    <li>HOME</li>
    <li>ABOUT US</li>
    <li>SERVICES</li>
    <li>PREVIOUS PROJECTS</li>
    <li>TESTIMONIALS</li>
    <li>NEWS</li>
    <li>RESEARCH &amp; DEV</li>
    <li>CONTACT</li>
</ul>

ul {
  display: flex;
  justify-content:space-between;
  list-style-type: none;
}

jsfiddle: http://jsfiddle.net/RAaJ8/

Browser support is actually quite good (with prefixes an other nasty stuff): http://caniuse.com/flexbox

Best way to alphanumeric check in JavaScript

    // On keypress event call the following method
    function AlphaNumCheck(e) {
        var charCode = (e.which) ? e.which : e.keyCode;
        if (charCode == 8) return true;

        var keynum;
        var keychar;
        var charcheck = /[a-zA-Z0-9]/;
        if (window.event) // IE
        {
            keynum = e.keyCode;
        }
        else {
            if (e.which) // Netscape/Firefox/Opera
            {
                keynum = e.which;
            }
            else return true;
        }

        keychar = String.fromCharCode(keynum);
        return charcheck.test(keychar);
    }

Further, this article also helps to understand JavaScript alphanumeric validation.

Copy file from source directory to binary directory using CMake

If you want to put the content of example into install folder after build:

code/
  src/
  example/
  CMakeLists.txt

try add the following to your CMakeLists.txt:

install(DIRECTORY example/ DESTINATION example)

Simple division in Java - is this a bug or a feature?

I find letter identifiers to be more readable and more indicative of parsed type:

1 - 7f / 10
1 - 7 / 10f

or:

1 - 7d / 10
1 - 7 / 10d

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

No.

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

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

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

Hence:

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

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

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

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

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

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

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

NuGet: 'X' already has a dependency defined for 'Y'

I faced this error on outdated version of Visual Studio 2010. Due to project configuration I was not able to update this version to newer. Therefore, update of NuGet advised above did not fix things for me.

Root reason for the error in this and similar situations is in dependencies of the package you try to install, which are not compatible with .NET version available in your project.

Universal solution is not obligatory update of Visual Studio or .NET but in installation of older NuGet versions of the same package compatible with your system.

It is not possible to tell for sure, which of earlier versions will work. In my case, this command installed the package without any NuGet updates.

Install-Package X -Version [compatible version number]

MySQL Workbench not opening on Windows

As per the current setup on June, 2017 Here is the downloadable link for Visual C++ 2015 Redistributable package : https://download.microsoft.com/download/9/3/F/93FCF1E7-E6A4-478B-96E7-D4B285925B00/vc_redist.x64.exe

Hope this will help, who are struggling with the download link.

Note: This is with regards to MySQL Workbench 6.3.9

load scripts asynchronously

I would complete zzzzBov's answer with a check for the presence of callback and allow passing of arguments:

    function loadScript(src, callback, args) {
      var s, r, t;
      r = false;
      s = document.createElement('script');
      s.type = 'text/javascript';
      s.src = src;
      if (typeof(callback) === 'function') {
        s.onload = s.onreadystatechange = function() {
          if (!r && (!this.readyState || this.readyState === 'complete')) {
            r = true;
            callback.apply(args);
          }
        };
      };
      t = document.getElementsByTagName('script')[0];
      t.parent.insertBefore(s, t);
    }

PHP Multidimensional Array Searching (Find key by specific value)

function search($array, $key, $value) 
{ 
    $results = array(); 

    if (is_array($array)) 
    { 
        if (isset($array[$key]) && $array[$key] == $value) 
            $results[] = $array; 

        foreach ($array as $subarray) 
            $results = array_merge($results, search($subarray, $key, $value)); 
    } 

    return $results; 
} 

Static nested class in Java, why?

The Sun page you link to has some key differences between the two:

A nested class is a member of its enclosing class. Non-static nested classes (inner classes) have access to other members of the enclosing class, even if they are declared private. Static nested classes do not have access to other members of the enclosing class.
...

Note: A static nested class interacts with the instance members of its outer class (and other classes) just like any other top-level class. In effect, a static nested class is behaviorally a top-level class that has been nested in another top-level class for packaging convenience.

There is no need for LinkedList.Entry to be top-level class as it is only used by LinkedList (there are some other interfaces that also have static nested classes named Entry, such as Map.Entry - same concept). And since it does not need access to LinkedList's members, it makes sense for it to be static - it's a much cleaner approach.

As Jon Skeet points out, I think it is a better idea if you are using a nested class is to start off with it being static, and then decide if it really needs to be non-static based on your usage.

ImportError: No module named BeautifulSoup

On Ubuntu 14.04 I installed it from apt-get and it worked fine:

sudo apt-get install python-beautifulsoup

Then just do:

from BeautifulSoup import BeautifulSoup

$date + 1 year?

just had the same problem, however this was the simplest solution:

<?php (date('Y')+1).date('-m-d'); ?>

How do you determine what SQL Tables have an identity column programmatically

I think this works for SQL 2000:

SELECT 
    CASE WHEN C.autoval IS NOT NULL THEN
        'Identity'
    ELSE
        'Not Identity'
    AND
FROM
    sysobjects O
INNER JOIN
    syscolumns C
ON
    O.id = C.id
WHERE
    O.NAME = @TableName
AND
    C.NAME = @ColumnName

Get last record of a table in Postgres

If you accept a tip, create an id in this table like serial. The default of this field will be:

nextval('table_name_field_seq'::regclass).

So, you use a query to call the last register. Using your example:

pg_query($connection, "SELECT currval('table_name_field_seq') AS id;

I hope this tip helps you.

Node.js Web Application examples/tutorials

The Node Knockout competition wrapped up recently, and many of the submissions are available on github. The competition site doesn't appear to be working right now, but I'm sure you could Google up a few entries to check out.

How do I access the $scope variable in browser's console using AngularJS?

This requires jQuery to be installed as well, but works perfectly for a dev environment. It looks through each element to get the instances of the scopes then returns them labelled with there controller names. Its also removing any property start with a $ which is what angularjs generally uses for its configuration.

let controllers = (extensive = false) => {
            let result = {};
            $('*').each((i, e) => {
                let scope = angular.element(e).scope();
                if(Object.prototype.toString.call(scope) === '[object Object]' && e.hasAttribute('ng-controller')) {
                    let slimScope = {};
                    for(let key in scope) {
                        if(key.indexOf('$') !== 0 && key !== 'constructor' || extensive) {
                            slimScope[key] = scope[key];
                        }
                    }
                    result[$(e).attr('ng-controller')] = slimScope;
                }
            });

            return result;
        }

How to use global variable in node.js?

I would suggest everytime when using global check if the variable is already define by simply check

if (!global.logger){
  global.logger = require('my_logger');
}

I've found it to have better performance

Difference between Node object and Element object?

Node : http://www.w3schools.com/js/js_htmldom_nodes.asp

The Node object represents a single node in the document tree. A node can be an element node, an attribute node, a text node, or any other of the node types explained in the Node Types chapter.

Element : http://www.w3schools.com/js/js_htmldom_elements.asp

The Element object represents an element in an XML document. Elements may contain attributes, other elements, or text. If an element contains text, the text is represented in a text-node.

duplicate :

What is the difference between URL parameters and query strings?

Parameters are key-value pairs that can appear inside URL path, and start with a semicolon character (;).

Query string appears after the path (if any) and starts with a question mark character (?).

Both parameters and query string contain key-value pairs.

In a GET request, parameters appear in the URL itself:

<scheme>://<username>:<password>@<host>:<port>/<path>;<parameters>?<query>#<fragment>

In a POST request, parameters can appear in the URL itself, but also in the datastream (as known as content).

Query string is always a part of the URL.

Parameters can be buried in form-data datastream when using POST method so they may not appear in the URL. Yes a POST request can define parameters as form data and in the URL, and this is not inconsistent because parameters can have several values.

I've found no explaination for this behavior so far. I guess it might be useful sometimes to "unhide" parameters from a POST request, or even let the code handling a GET request share some parts with the code handling a POST. Of course this can work only with server code supporting parameters in a URL.

Until you get better insights, I suggest you to use parameters only in form-data datastream of POST requests.

Sources:

What Every Developer Should Know About URLs

RFC 3986

Java Timestamp - How can I create a Timestamp with the date 23/09/2007?

You could also do the following:

// untested
Calendar cal = GregorianCalendar.getInstance();
cal.set(Calendar.DAY_OF_MONTH, 23);// I might have the wrong Calendar constant...
cal.set(Calendar.MONTH, 8);// -1 as month is zero-based
cal.set(Calendar.YEAR, 2009);
Timestamp tstamp = new Timestamp(cal.getTimeInMillis());

CSS Change List Item Background Color with Class

The ul.nav li is more restrictive and so takes precedence, try this:

ul.nav li.selected {  
  background-color:red; 
}

Cannot find module '../build/Release/bson'] code: 'MODULE_NOT_FOUND' } js-bson: Failed to load c++ bson extension, using pure JS version

I also had the same problem with bson.

trying a newer mongoose version

npm install [email protected]

solved the issue.

Massimo.

Python - Convert a bytes array into JSON format

You can simply use,

import json

json.loads(my_bytes_value)

What is a mixin, and why are they useful?

OP mentioned that he/she never heard of mixin in C++, perhaps that is because they are called Curiously Recurring Template Pattern (CRTP) in C++. Also, @Ciro Santilli mentioned that mixin is implemented via abstract base class in C++. While abstract base class can be used to implement mixin, it is an overkill as the functionality of virtual function at run-time can be achieved using template at compile time without the overhead of virtual table lookup at run-time.

The CRTP pattern is described in detail here

I have converted the python example in @Ciro Santilli's answer into C++ using template class below:

    #include <iostream>
    #include <assert.h>

    template <class T>
    class ComparableMixin {
    public:
        bool operator !=(ComparableMixin &other) {
            return ~(*static_cast<T*>(this) == static_cast<T&>(other));
        }
        bool operator <(ComparableMixin &other) {
            return ((*(this) != other) && (*static_cast<T*>(this) <= static_cast<T&>(other)));
        }
        bool operator >(ComparableMixin &other) {
            return ~(*static_cast<T*>(this) <= static_cast<T&>(other));
        }
        bool operator >=(ComparableMixin &other) {
            return ((*static_cast<T*>(this) == static_cast<T&>(other)) || (*(this) > other));
        }
        protected:
            ComparableMixin() {}
    };

    class Integer: public ComparableMixin<Integer> {
    public:
     Integer(int i) {
         this->i = i;
     }
     int i;
     bool operator <=(Integer &other) {
         return (this->i <= other.i);
     }
     bool operator ==(Integer &other) {
         return (this->i == other.i);
     }
    };

int main() {

    Integer i(0) ;
    Integer j(1) ;
    //ComparableMixin<Integer> c; // this will cause compilation error because constructor is protected.
    assert (i < j );
    assert (i != j);
    assert (j >  i);
    assert (j >= i);

    return 0;
}

EDIT: Added protected constructor in ComparableMixin so that it can only be inherited and not instantiated. Updated the example to show how protected constructor will cause compilation error when an object of ComparableMixin is created.

Can't escape the backslash with regex?

This solution fixed my problem while replacing br tag to '\n' .

alert(content.replace(/<br\/\>/g,'\n'));

Where can I find the .apk file on my device, when I download any app and install?

You can use a file browser with an backup function, for example the ES File Explorer Long tap a item and select create backup

Function ereg_replace() is deprecated - How to clear this bug?

http://php.net/ereg_replace says:

Note: As of PHP 5.3.0, the regex extension is deprecated in favor of the PCRE extension.

Thus, preg_replace is in every way better choice. Note there are some differences in pattern syntax though.

Variable number of arguments in C++?

The only way is through the use of C style variable arguments, as described here. Note that this is not a recommended practice, as it's not typesafe and error-prone.