Background color of text in SVG

You can combine filter with the text.

_x000D_

<!DOCTYPE html>_x000D_
<html>_x000D_
  <head>_x000D_
    <meta charset=utf-8 />_x000D_
    <title>SVG colored patterns via mask</title>_x000D_
  </head>_x000D_
  <body>_x000D_
    <svg viewBox="0 0 300 300" xmlns="http://www.w3.org/2000/svg">_x000D_
      <defs>_x000D_
        <filter x="0" y="0" width="1" height="1" id="bg-text">_x000D_
          <feFlood flood-color="white"/>_x000D_
          <feComposite in="SourceGraphic" operator="xor" />_x000D_
        </filter>_x000D_
      </defs>_x000D_
   <!-- something has already existed -->_x000D_
    <rect fill="red" x="150" y="20" width="100" height="50" />_x000D_
    <circle cx="50"  cy="50" r="50" fill="blue"/>_x000D_
      _x000D_
      <!-- Text render here -->_x000D_
      <text filter="url(#bg-text)" fill="black" x="20" y="50" font-size="30">text with color</text>_x000D_
      <text fill="black" x="20" y="50" font-size="30">text with color</text>_x000D_
    </svg>_x000D_
  </body>_x000D_
</html>

_x000D_

Download history stock prices automatically from yahoo finance in python

When you're going to work with such time series in Python, pandas is indispensable. And here's the good news: it comes with a historical data downloader for Yahoo: pandas.io.data.DataReader.

from pandas.io.data import DataReader
from datetime import datetime

ibm = DataReader('IBM',  'yahoo', datetime(2000, 1, 1), datetime(2012, 1, 1))
print(ibm['Adj Close'])

Here's an example from the pandas documentation.

Update for pandas >= 0.19:

The pandas.io.data module has been removed from pandas>=0.19 onwards. Instead, you should use the separate pandas-datareader package. Install with:

pip install pandas-datareader

And then you can do this in Python:

import pandas_datareader as pdr
from datetime import datetime

ibm = pdr.get_data_yahoo(symbols='IBM', start=datetime(2000, 1, 1), end=datetime(2012, 1, 1))
print(ibm['Adj Close'])

Downloading from Google Finance is also supported.

There's more in the documentation of pandas-datareader.

How to convert String to DOM Document object in java?

DocumentBuilder db = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document document = db.parse(new ByteArrayInputStream(xmlString.getBytes("UTF-8"))); //remove the parameter UTF-8 if you don't want to specify the Encoding type.

this works well for me even though the XML structure is complex.

And please make sure your xmlString is valid for XML, notice the escape character should be added "\" at the front.

The main problem might not come from the attributes.

Using port number in Windows host file

Install Redirector
Click Edit redirects -> Create New Redirect

Difference in days between two dates in Java?

You should use Joda Time library because Java Util Date returns wrong values sometimes.

Joda vs Java Util Date

For example days between yesterday (dd-mm-yyyy, 12-07-2016) and first day of year in 1957 (dd-mm-yyyy, 01-01-1957):

public class Main {

public static void main(String[] args) {
    SimpleDateFormat format = new SimpleDateFormat("dd-MM-yyyy");

    Date date = null;
    try {
        date = format.parse("12-07-2016");
    } catch (ParseException e) {
        e.printStackTrace();
    }

    //Try with Joda - prints 21742
    System.out.println("This is correct: " + getDaysBetweenDatesWithJodaFromYear1957(date));
    //Try with Java util - prints 21741
    System.out.println("This is not correct: " + getDaysBetweenDatesWithJavaUtilFromYear1957(date));    
}


private static int getDaysBetweenDatesWithJodaFromYear1957(Date date) {
    DateTime jodaDateTime = new DateTime(date);
    DateTimeFormatter formatter = DateTimeFormat.forPattern("dd-MM-yyyy");
    DateTime y1957 = formatter.parseDateTime("01-01-1957");

    return Days.daysBetween(y1957 , jodaDateTime).getDays();
}

private static long getDaysBetweenDatesWithJavaUtilFromYear1957(Date date) {
    SimpleDateFormat format = new SimpleDateFormat("dd-MM-yyyy");

    Date y1957 = null;
    try {
        y1957 = format.parse("01-01-1957");
    } catch (ParseException e) {
        e.printStackTrace();
    }

    return TimeUnit.DAYS.convert(date.getTime() - y1957.getTime(), TimeUnit.MILLISECONDS);
}

So I really advice you to use Joda Time library.

It's just shorthand for "constructor" - and it's what the constructor is called in IL, too. For example, open up Reflector and look at a type and you'll see members called .ctor for the various constructors.

Vertically centering Bootstrap modal window

this Works for me perfectly:

.modal {
text-align: center;
padding: 0!important;
}

.modal:before {
content: '';
display: inline-block;
height: 100%;
vertical-align: middle;
margin-right: -4px;
}

.modal-dialog {
display: inline-block;
text-align: left;
vertical-align: middle;
}

complete Demo URL : https://codepen.io/dimbslmh/full/mKfCc

How to make a boolean variable switch between true and false every time a method is invoked?

Assuming your code above is the actual code, you have two problems:

1) your if statements need to be '==', not '='. You want to do comparison, not assignment.

2) The second if should be an 'else if'. Otherwise when it's false, you will set it to true, then the second if will be evaluated, and you'll set it back to false, as you describe

if (a == false) {
  a = true;
} else if (a == true) {
  a = false;
}

Another thing that would make it even simpler is the '!' operator:

a = !a;

will switch the value of a.

How to install a python library manually

I'm going to assume compiling the QuickFix package does not produce a setup.py file, but rather only compiles the Python bindings and relies on make install to put them in the appropriate place.

In this case, a quick and dirty fix is to compile the QuickFix source, locate the Python extension modules (you indicated on your system these end with a .so extension), and add that directory to your PYTHONPATH environmental variable e.g., add

export PYTHONPATH=~/path/to/python/extensions:PYTHONPATH

or similar line in your shell configuration file.

A more robust solution would include making sure to compile with ./configure --prefix=$HOME/.local. Assuming QuickFix knows to put the Python files in the appropriate site-packages, when you do make install, it should install the files to ~/.local/lib/pythonX.Y/site-packages, which, for Python 2.6+, should already be on your Python path as the per-user site-packages directory.

If, on the other hand, it did provide a setup.py file, simply run

python setup.py install --user

for Python 2.6+.

How do I get the full path to a Perl script that is executing?

Some short background:

Unfortunately the Unix API doesn't provide a running program with the full path to the executable. In fact, the program executing yours can provide whatever it wants in the field that normally tells your program what it is. There are, as all the answers point out, various heuristics for finding likely candidates. But nothing short of searching the entire filesystem will always work, and even that will fail if the executable is moved or removed.

But you don't want the Perl executable, which is what's actually running, but the script it is executing. And Perl needs to know where the script is to find it. It stores this in __FILE__, while $0 is from the Unix API. This can still be a relative path, so take Mark's suggestion and canonize it with File::Spec->rel2abs( __FILE__ );

Oracle: How to filter by date and time in a where clause

Obviously '12/01/2012 13:16:32.000' doesn't match 'DD-MON-YYYY hh24:mi' format.

Update:

You need 'MM/DD/YYYY hh24:mi:ss.ff' format and to use TO_TIMESTAMP instead of TO_DATE cause dates don't hold millis in oracle.

I want to truncate a text or line with ellipsis using JavaScript

function truncate(input) {
   if (input.length > 5) {
      return input.substring(0, 5) + '...';
   }
   return input;
};

or in ES6

const truncate = (input) => input.length > 5 ? `${input.substring(0, 5)}...` : input;

How to give a user only select permission on a database

You can use Create USer to create a user

CREATE LOGIN sam
    WITH PASSWORD = '340$Uuxwp7Mcxo7Khy';
USE AdventureWorks;
CREATE USER sam FOR LOGIN sam;
GO

and to Grant (Read-only access) you can use the following

GRANT SELECT TO sam

Hope that helps.

What is Hive: Return Code 2 from org.apache.hadoop.hive.ql.exec.MapRedTask

I faced the same issue because I didn't have permission to query the database I was trying to.

In the case you don't have permission to query the table/database, besides the Return Code 2 from org.apache.hadoop.hive.ql.exec.MapRedTask error, you will see that in Cloudera Manager is not even registering your query.

org.apache.http.conn.HttpHostConnectException: Connection to http://localhost refused in android

When you test with device you want to add your PC ip address.

in pc run in cmd Ipconfig

in ubuntu run terminal ifconfig

Then use "http://your_pc_ip_address:8080/register" insted of using "http://10.0.2.2:8080/register"

in my pc = 192.168.1.3

and also add internet permission to Manifest

<uses-permission android:name="android.permission.INTERNET"></uses-permission>

ContractFilter mismatch at the EndpointDispatcher exception

This error generally comes if the code is not deployed properly.

In my case, I have two services ServiceA and ServiceB. I found the problem that ServiceB files were not deployed properly. Because of which when ServiceA was calling ServiceB internally it was giving below error.

**Error**

Please make sure the files and references are deployed properly.

How can I make space between two buttons in same div?

I actual ran into the same requirement. I simply used CSS override like this

.navbar .btn-toolbar { margin-top: 0; margin-bottom: 0 }

Reading a binary input stream into a single byte array in Java

You can read it by chunks (byte buffer[] = new byte[2048]) and write the chunks to a ByteArrayOutputStream. From the ByteArrayOutputStream you can retrieve the contents as a byte[], without needing to determine its size beforehand.

Vertical and horizontal align (middle and center) with CSS

There are many methods :

Center horizontal and vertical align of an element with fixed measure

CSS

 <div style="width:200px;height:100px;position:absolute;left:50%;top:50%;
margin-left:-100px;margin-top:-50px;">
<!–content–>
</div>

2 . Center horizontally and vertically a single line of text

CSS

<div style="width:400px;height:200px;text-align:center;line-height:200px;">
<!–content–>
</div>

3 . Center horizontal and vertical align of an element with no specific measure

CSS

<div style="display:table;height:300px;text-align:center;">
<div style="display:table-cell;vertical-align:middle;">
<!–content–>
</div>
</div>

Access Tomcat Manager App from different host

For Tomcat v8.5.4 and above, the file <tomcat>/webapps/manager/META-INF/context.xml has been adjusted:

<Context antiResourceLocking="false" privileged="true" >
    <Valve className="org.apache.catalina.valves.RemoteAddrValve"
         allow="127\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1" />
</Context>

Change this file to comment the Valve:

<Context antiResourceLocking="false" privileged="true" >
    <!--
    <Valve className="org.apache.catalina.valves.RemoteAddrValve"
         allow="127\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1" />
    -->
</Context>

After that, refresh your browser (not need to restart Tomcat), you can see the manager page.

How can I roll back my last delete command in MySQL?

A "rollback" only works if you used transactions. That way you can group queries together and undo all queries if only one of them fails.

But if you already committed the transaction (or used a regular DELETE-query), the only way of getting your data back is to recover it from a previously made backup.

Hibernate HQL Query : How to set a Collection as a named parameter of a Query?

I'm not sure about HQL, but in JPA you just call the query's setParameter with the parameter and collection.

Query q = entityManager.createQuery("SELECT p FROM Peron p WHERE name IN (:names)");
q.setParameter("names", names);

where names is the collection of names you're searching for

Collection<String> names = new ArrayList<String();
names.add("Joe");
names.add("Jane");
names.add("Bob");

Site does not exist error for a2ensite

You probably updated your Ubuntu installation and one of the updates included the upgrade of Apache to version 2.4.x

In Apache 2.4.x the vhost configuration files, located in the /etc/apache2/sites-available directory, must have the .conf extension.

Using terminal (mv command), rename all your existing configuration files and add the .conf extension to all of them.

mv /etc/apache2/sites-available/cmsplus.dev /etc/apache2/sites-available/cmsplus.dev.conf

If you get a "Permission denied" error, then add "sudo " in front of your terminal commands.

You do not need to make any other changes to the configuration files.

Enable the vhost(s):

a2ensite cmsplus.dev.conf

And then reload Apache:

service apache2 reload

Your sites should be up and running now.

UPDATE: As mentioned here, a Linux distribution that you installed changed the configuration to Include *.conf only. Therefore it has nothing to do with Apache 2.2 or 2.4

How does Java deal with multiple conditions inside a single IF statement

Is Java smart enough to skip checking bool2 and bool2 if bool1 was evaluated to false?

Its not a matter of being smart, its a requirement specified in the language. Otherwise you couldn't write expressions like.

if(s != null && s.length() > 0)

if(s == null || s.length() == 0)

BTW if you use & and | it will always evaluate both sides of the expression.

Log exception with traceback

Use logging.exception from within the except: handler/block to log the current exception along with the trace information, prepended with a message.

import logging
LOG_FILENAME = '/tmp/logging_example.out'
logging.basicConfig(filename=LOG_FILENAME, level=logging.DEBUG)

logging.debug('This message should go to the log file')

try:
    run_my_stuff()
except:
    logging.exception('Got exception on main handler')
    raise

Now looking at the log file, /tmp/logging_example.out:

DEBUG:root:This message should go to the log file
ERROR:root:Got exception on main handler
Traceback (most recent call last):
  File "/tmp/teste.py", line 9, in <module>
    run_my_stuff()
NameError: name 'run_my_stuff' is not defined

JSON parse error: Can not construct instance of java.time.LocalDate: no String-argument constructor/factory method to deserialize from String value

As it turns out, one should not forget to include jacson dependency into the pom file. This solved the issue for me:

<dependency>
    <groupId>com.fasterxml.jackson.module</groupId>
    <artifactId>jackson-module-parameter-names</artifactId>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.datatype</groupId>
    <artifactId>jackson-datatype-jdk8</artifactId>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.datatype</groupId>
    <artifactId>jackson-datatype-jsr310</artifactId>
</dependency>

redistributable offline .NET Framework 3.5 installer for Windows 8

Microsoft .NET framework 3.5 can be installed on windows 10 without having installation media. The file you need is called microsoft-windows-netfx3-ondemand-package.cab. Just google it and you will get the download links. After downloading it, copy that file to C:\dotnet35 and run the following command.

Dism.exe /online /enable-feature /featurename:NetFX3 /All /Source:c:\dotnet35 /LimitAccess

Tested and worked in Windows 10 without any issue.

Apache 13 permission denied in user's home directory

Could be SELinux. Check the appropriate log file (/var/log/messages? - been a while since I've used a RedHat derivative) to see if that's blocking the access.

Is "delete this" allowed in C++?

Yes, delete this; has defined results, as long as (as you've noted) you assure the object was allocated dynamically, and (of course) never attempt to use the object after it's destroyed. Over the years, many questions have been asked about what the standard says specifically about delete this;, as opposed to deleting some other pointer. The answer to that is fairly short and simple: it doesn't say much of anything. It just says that delete's operand must be an expression that designates a pointer to an object, or an array of objects. It goes into quite a bit of detail about things like how it figures out what (if any) deallocation function to call to release the memory, but the entire section on delete (§[expr.delete]) doesn't mention delete this; specifically at all. The section on destrucors does mention delete this in one place (§[class.dtor]/13):

At the point of definition of a virtual destructor (including an implicit definition (15.8)), the non-array deallocation function is determined as if for the expression delete this appearing in a non-virtual destructor of the destructor’s class (see 8.3.5).

That tends to support the idea that the standard considers delete this; to be valid--if it was invalid, its type wouldn't be meaningful. That's the only place the standard mentions delete this; at all, as far as I know.

Anyway, some consider delete this a nasty hack, and tell anybody who will listen that it should be avoided. One commonly cited problem is the difficulty of ensuring that objects of the class are only ever allocated dynamically. Others consider it a perfectly reasonable idiom, and use it all the time. Personally, I'm somewhere in the middle: I rarely use it, but don't hesitate to do so when it seems to be the right tool for the job.

The primary time you use this technique is with an object that has a life that's almost entirely its own. One example James Kanze has cited was a billing/tracking system he worked on for a phone company. When start to you make a phone call, something takes note of that and creates a phone_call object. From that point onward, the phone_call object handles the details of the phone call (making a connection when you dial, adding an entry to the database to say when the call started, possibly connect more people if you do a conference call, etc.) When the last people on the call hang up, the phone_call object does its final book-keeping (e.g., adds an entry to the database to say when you hung up, so they can compute how long your call was) and then destroys itself. The lifetime of the phone_call object is based on when the first person starts the call and when the last people leave the call--from the viewpoint of the rest of the system, it's basically entirely arbitrary, so you can't tie it to any lexical scope in the code, or anything on that order.

For anybody who might care about how dependable this kind of coding can be: if you make a phone call to, from, or through almost any part of Europe, there's a pretty good chance that it's being handled (at least in part) by code that does exactly this.

How can I send an xml body using requests library?

Pass in the straight XML instead of a dictionary.

What is the difference between `git merge` and `git merge --no-ff`?

This is an old question, and this is somewhat subtly mentioned in the other posts, but the explanation that made this click for me is that non fast forward merges will require a separate commit.

How to get the index with the key in Python dictionary?

No, there is no straightforward way because Python dictionaries do not have a set ordering.

From the documentation:

Keys and values are listed in an arbitrary order which is non-random, varies across Python implementations, and depends on the dictionary’s history of insertions and deletions.

In other words, the 'index' of b depends entirely on what was inserted into and deleted from the mapping before:

>>> map={}
>>> map['b']=1
>>> map
{'b': 1}
>>> map['a']=1
>>> map
{'a': 1, 'b': 1}
>>> map['c']=1
>>> map
{'a': 1, 'c': 1, 'b': 1}

As of Python 2.7, you could use the collections.OrderedDict() type instead, if insertion order is important to your application.

Virtual Serial Port for Linux

There is also tty0tty http://sourceforge.net/projects/tty0tty/ which is a real null modem emulator for linux.

It is a simple kernel module - a small source file. I don't know why it only got thumbs down on sourceforge, but it works well for me. The best thing about it is that is also emulates the hardware pins (RTC/CTS DSR/DTR). It even implements TIOCMGET/TIOCMSET and TIOCMIWAIT iotcl commands!

On a recent kernel you may get compilation errors. This is easy to fix. Just insert a few lines at the top of the module/tty0tty.c source (after the includes):

#ifndef init_MUTEX
#define init_MUTEX(x) sema_init((x),1)
#endif

When the module is loaded, it creates 4 pairs of serial ports. The devices are /dev/tnt0 to /dev/tnt7 where tnt0 is connected to tnt1, tnt2 is connected to tnt3, etc. You may need to fix the file permissions to be able to use the devices.

edit:

I guess I was a little quick with my enthusiasm. While the driver looks promising, it seems unstable. I don't know for sure but I think it crashed a machine in the office I was working on from home. I can't check until I'm back in the office on monday.

The second thing is that TIOCMIWAIT does not work. The code seems to be copied from some "tiny tty" example code. The handling of TIOCMIWAIT seems in place, but it never wakes up because the corresponding call to wake_up_interruptible() is missing.

edit:

The crash in the office really was the driver's fault. There was an initialization missing, and the completely untested TIOCMIWAIT code caused a crash of the machine.

I spent yesterday and today rewriting the driver. There were a lot of issues, but now it works well for me. There's still code missing for hardware flow control managed by the driver, but I don't need it because I'll be managing the pins myself using TIOCMGET/TIOCMSET/TIOCMIWAIT from user mode code.

If anyone is interested in my version of the code, send me a message and I'll send it to you.

Scanner is never closed

According to the Javadoc of Scanner, it closes the stream when you call it's close method. Generally speaking, the code that creates a resource is also responsible for closing it. System.in was not instantiated by by your code, but by the VM. So in this case it's safe to not close the Scanner, ignore the warning and add a comment why you ignore it. The VM will take care of closing it if needed.

(Offtopic: instead of "amount", the word "number" would be more appropriate to use for a number of players. English is not my native language (I'm Dutch) and I used to make exactly the same mistake.)

Getting Data from Android Play Store

There's an unofficial open-source API for the Android Market you may try to use to get the information you need. Hope this helps.

Set Page Title using PHP

<?php echo APP_TITLE?> - <?php echo $page_title;?>

this should work fine for you

How do I decode a URL parameter using C#?

Try:

var myUrl = "my.aspx?val=%2Fxyz2F";
var decodeUrl = System.Uri.UnescapeDataString(myUrl);

CodeIgniter -> Get current URL relative to base url

you can use the some Codeigniter functions and some core functions and make combination to achieve your URL with query string. I found solution of this problem.

base_url($this->uri->uri_string()).strrchr($_SERVER['REQUEST_URI'], "?");

and if you loaded URL helper so you can also do this current_url().strrchr($_SERVER['REQUEST_URI'], "?");

what is difference between success and .done() method of $.ajax

success only fires if the AJAX call is successful, i.e. ultimately returns a HTTP 200 status. error fires if it fails and complete when the request finishes, regardless of success.

In jQuery 1.8 on the jqXHR object (returned by $.ajax) success was replaced with done, error with fail and complete with always.

However you should still be able to initialise the AJAX request with the old syntax. So these do similar things:

// set success action before making the request
$.ajax({
  url: '...',
  success: function(){
    alert('AJAX successful');
  }
});

// set success action just after starting the request
var jqxhr = $.ajax( "..." )
  .done(function() { alert("success"); });

This change is for compatibility with jQuery 1.5's deferred object. Deferred (and now Promise, which has full native browser support in Chrome and FX) allow you to chain asynchronous actions:

$.ajax("parent").
    done(function(p) { return $.ajax("child/" + p.id); }).
    done(someOtherDeferredFunction).
    done(function(c) { alert("success: " + c.name); });

This chain of functions is easier to maintain than a nested pyramid of callbacks you get with success.

However, please note that done is now deprecated in favour of the Promise syntax that uses then instead:

$.ajax("parent").
    then(function(p) { return $.ajax("child/" + p.id); }).
    then(someOtherDeferredFunction).
    then(function(c) { alert("success: " + c.name); }).
    catch(function(err) { alert("error: " + err.message); });

This is worth adopting because async and await extend promises improved syntax (and error handling):

try {
    var p = await $.ajax("parent");
    var x = await $.ajax("child/" + p.id);
    var c = await someOtherDeferredFunction(x);
    alert("success: " + c.name);
}
catch(err) { 
    alert("error: " + err.message); 
}

DateTime.TryParse issue with dates of yyyy-dd-MM format

From DateTime on msdn:

Type: System.DateTime% When this method returns, contains the DateTime value equivalent to the date and time contained in s, if the conversion succeeded, or MinValue if the conversion failed. The conversion fails if the s parameter is null, is an empty string (""), or does not contain a valid string representation of a date and time. This parameter is passed uninitialized.

Use parseexact with the format string "yyyy-dd-MM hh:mm tt" instead.

Scrollview vertical and horizontal in android

Mixing some of the suggestions above, and was able to get a good solution:

Custom ScrollView:

package com.scrollable.view;

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.ScrollView;

public class VScroll extends ScrollView {

    public VScroll(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    public VScroll(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public VScroll(Context context) {
        super(context);
    }

    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        return false;
    }
}

Custom HorizontalScrollView:

package com.scrollable.view;

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.HorizontalScrollView;

public class HScroll extends HorizontalScrollView {

    public HScroll(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    public HScroll(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public HScroll(Context context) {
        super(context);
    }

    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        return false;
    }
}

the ScrollableImageActivity:

package com.scrollable.view;

import android.app.Activity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.widget.HorizontalScrollView;
import android.widget.ScrollView;

public class ScrollableImageActivity extends Activity {

    private float mx, my;
    private float curX, curY;

    private ScrollView vScroll;
    private HorizontalScrollView hScroll;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        vScroll = (ScrollView) findViewById(R.id.vScroll);
        hScroll = (HorizontalScrollView) findViewById(R.id.hScroll);

    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        float curX, curY;

        switch (event.getAction()) {

            case MotionEvent.ACTION_DOWN:
                mx = event.getX();
                my = event.getY();
                break;
            case MotionEvent.ACTION_MOVE:
                curX = event.getX();
                curY = event.getY();
                vScroll.scrollBy((int) (mx - curX), (int) (my - curY));
                hScroll.scrollBy((int) (mx - curX), (int) (my - curY));
                mx = curX;
                my = curY;
                break;
            case MotionEvent.ACTION_UP:
                curX = event.getX();
                curY = event.getY();
                vScroll.scrollBy((int) (mx - curX), (int) (my - curY));
                hScroll.scrollBy((int) (mx - curX), (int) (my - curY));
                break;
        }

        return true;
    }

}

the layout:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <com.scrollable.view.VScroll android:layout_height="fill_parent"
        android:layout_width="fill_parent" android:id="@+id/vScroll">
        <com.scrollable.view.HScroll android:id="@+id/hScroll"
            android:layout_width="fill_parent" android:layout_height="fill_parent">
            <ImageView android:layout_width="fill_parent" android:layout_height="fill_parent" android:src="@drawable/bg"></ImageView>
        </com.scrollable.view.HScroll>
    </com.scrollable.view.VScroll>

</LinearLayout>

Make flex items take content width, not width of parent container

Use align-items: flex-start on the container, or align-self: flex-start on the flex items.

No need for display: inline-flex.

An initial setting of a flex container is align-items: stretch. This means that flex items will expand to cover the full length of the container along the cross axis.

The align-self property does the same thing as align-items, except that align-self applies to flex items while align-items applies to the flex container.

By default, align-self inherits the value of align-items.

Since your container is flex-direction: column, the cross axis is horizontal, and align-items: stretch is expanding the child element's width as much as it can.

You can override the default with align-items: flex-start on the container (which is inherited by all flex items) or align-self: flex-start on the item (which is confined to the single item).

Learn more about flex alignment along the cross axis here:

How does flex-wrap work with align-self, align-items and align-content?

Learn more about flex alignment along the main axis here:

In CSS Flexbox, why are there no "justify-items" and "justify-self" properties?

Function to close the window in Tkinter

def exit(self):
    self.frame.destroy()
exit_btn=Button(self.frame,text='Exit',command=self.exit,activebackground='grey',activeforeground='#AB78F1',bg='#58F0AB',highlightcolor='red',padx='10px',pady='3px')
exit_btn.place(relx=0.45,rely=0.35)

This worked for me to destroy my Tkinter frame on clicking the exit button.

jQuery Scroll to bottom of page/iframe

A simple function that jumps (instantly scrolls) to the bottom of the whole page. It uses the built-in .scrollTop(). I haven’t tried to adapt this to work with individual page elements.

function jumpToPageBottom() {
    $('html, body').scrollTop( $(document).height() - $(window).height() );
}

Why do I get a "permission denied" error while installing a gem?

Seems like a permissions issue. This is what worked for me

sudo chown -R $(whoami) /Library/Ruby/Gems/*

or in your case

sudo chown -R $(whoami) /usr/local/lib/ruby/gems/2.0.0/gems/

What does this do:

This is telling the system to change the files to change the ownership to the current user. Something must have gotten messed up when something got installed. Usually this is because there are multiple accounts or users are using sudo to install when they should not always have to.

Does bootstrap 4 have a built in horizontal divider?

_x000D_

   <div class="form-group col-12">_x000D_
            <hr>_x000D_
   </div>

_x000D_

Eclipse C++ : "Program "g++" not found in PATH"

You need a gcc, g++ compiler toolchain (on your windows machine) for the eclipse which you have manually downloaded, One of the options can be done implicit via cygwin installation(by selecting proper development packages for gcc, g++) and then add the location of the compiled gcc ,g++ package like C:\cygwin\etc\alternatives to the PATH variable for windows environment.

After this open eclipse and go to Project->properties->C/C++ Tool Chain Editor and add replace default GNU C++ compiler and GNU C Compiler with Cygwin C++ compiler and Cygwin C compiler and rebuild the project. The errors related to gcc, g++ PATH not found will now be gone.

How to set tint for an image view programmatically in android?

Kotlin solution using extension function, to set and unset the tinting :

fun ImageView.setTint(@ColorInt color: Int?) {
    if (color == null) {
        ImageViewCompat.setImageTintList(this, null)
        return
    }
    ImageViewCompat.setImageTintMode(this, PorterDuff.Mode.SRC_ATOP)
    ImageViewCompat.setImageTintList(this, ColorStateList.valueOf(color))
}

Required attribute HTML5

Okay. The same time I was writing down my question one of my colleagues made me aware this is actually HTML5 behavior. See http://dev.w3.org/html5/spec/Overview.html#the-required-attribute

Seems in HTML5 there is a new attribute "required". And Safari 5 already has an implementation for this attribute.

.htaccess rewrite subdomain to directory

For any sub domain request, use this:

RewriteEngine on 
RewriteCond %{HTTP_HOST} !^www\.band\.s\.co 
RewriteCond %{HTTP_HOST} ^(.*)\.band\.s\.co 
RewriteCond %{REQUEST_URI} !^/([a-zA-Z0-9-z\-]+) 
RewriteRule ^(.*)$ /%1/$1 [L]

Just make some folder same as sub domain name you need. Folder must be exist like this: domain.com/sub for sub.domain.com.

Summarizing multiple columns with dplyr?

We can summarize by using summarize_at, summarize_all and summarize_if on dplyr 0.7.4. We can set the multiple columns and functions by using vars and funs argument as below code. The left-hand side of funs formula is assigned to suffix of summarized vars. In the dplyr 0.7.4, summarise_each(and mutate_each) is already deprecated, so we cannot use these functions.

options(scipen = 100, dplyr.width = Inf, dplyr.print_max = Inf)

library(dplyr)
packageVersion("dplyr")
# [1] ‘0.7.4’

set.seed(123)
df <- data_frame(
  a = sample(1:5, 10, replace=T), 
  b = sample(1:5, 10, replace=T), 
  c = sample(1:5, 10, replace=T), 
  d = sample(1:5, 10, replace=T), 
  grp = as.character(sample(1:3, 10, replace=T)) # For convenience, specify character type
)

df %>% group_by(grp) %>% 
  summarise_each(.vars = letters[1:4],
                 .funs = c(mean="mean"))
# `summarise_each()` is deprecated.
# Use `summarise_all()`, `summarise_at()` or `summarise_if()` instead.
# To map `funs` over a selection of variables, use `summarise_at()`
# Error: Strings must match column names. Unknown columns: mean

You should change to the following code. The following codes all have the same result.

# summarise_at
df %>% group_by(grp) %>% 
  summarise_at(.vars = letters[1:4],
               .funs = c(mean="mean"))

df %>% group_by(grp) %>% 
  summarise_at(.vars = names(.)[1:4],
               .funs = c(mean="mean"))

df %>% group_by(grp) %>% 
  summarise_at(.vars = vars(a,b,c,d),
               .funs = c(mean="mean"))

# summarise_all
df %>% group_by(grp) %>% 
  summarise_all(.funs = c(mean="mean"))

# summarise_if
df %>% group_by(grp) %>% 
  summarise_if(.predicate = function(x) is.numeric(x),
               .funs = funs(mean="mean"))
# A tibble: 3 x 5
# grp a_mean b_mean c_mean d_mean
# <chr>  <dbl>  <dbl>  <dbl>  <dbl>
# 1     1   2.80   3.00    3.6   3.00
# 2     2   4.25   2.75    4.0   3.75
# 3     3   3.00   5.00    1.0   2.00

You can also have multiple functions.

df %>% group_by(grp) %>% 
  summarise_at(.vars = letters[1:2],
               .funs = c(Mean="mean", Sd="sd"))
# A tibble: 3 x 5
# grp a_Mean b_Mean      a_Sd     b_Sd
# <chr>  <dbl>  <dbl>     <dbl>    <dbl>
# 1     1   2.80   3.00 1.4832397 1.870829
# 2     2   4.25   2.75 0.9574271 1.258306
# 3     3   3.00   5.00        NA       NA

git pull keeping local changes

Incase their is local uncommitted changes and avoid merge conflict while pulling.

git stash save
git pull
git stash pop

refer - https://happygitwithr.com/pull-tricky.html

How do I check if a number is positive or negative in C#?

public static bool IsNegative<T>(T value)
   where T : struct, IComparable<T>
{
    return value.CompareTo(default(T)) < 0;
}

MySQL, Concatenate two columns

In query, CONCAT_WS() function.

This function not only add multiple string values and makes them a single string value. It also let you define separator ( ” “, ” , “, ” – “,” _ “, etc.).

Syntax –

CONCAT_WS( SEPERATOR, column1, column2, ... )

Example

SELECT 
topic, 
CONCAT_WS( " ", subject, year ) AS subject_year 
FROM table

Starting the week on Monday with isoWeekday()

thought I would add this for any future peeps. It will always make sure that its monday if needed, can also be used to always ensure sunday. For me I always need monday, but local is dependant on the machine being used, and this is an easy fix:

var begin = moment().isoWeekday(1).startOf('week');
var begin2 = moment().startOf('week');
// could check to see if day 1 = Sunday  then add 1 day
// my mac on bst still treats day 1 as sunday    

var firstDay = moment().startOf('week').format('dddd') === 'Sunday' ?     
moment().startOf('week').add('d',1).format('dddd DD-MM-YYYY') : 
moment().startOf('week').format('dddd DD-MM-YYYY');

document.body.innerHTML = '<b>could be monday or sunday depending on client: </b><br />' + 
begin.format('dddd DD-MM-YYYY') + 
'<br /><br /> <b>should be monday:</b> <br>' + firstDay + 
'<br><br> <b>could also be sunday or monday </b><br> ' + 
begin2.format('dddd DD-MM-YYYY');

Console logging for react?

Here are some more console logging "pro tips":

console.table

var animals = [
    { animal: 'Horse', name: 'Henry', age: 43 },
    { animal: 'Dog', name: 'Fred', age: 13 },
    { animal: 'Cat', name: 'Frodo', age: 18 }
];

console.table(animals);

console.trace

Shows you the call stack for leading up to the console.

You can even customise your consoles to make them stand out

console.todo = function(msg) {
    console.log(‘ % c % s % s % s‘, ‘color: yellow; background - color: black;’, ‘–‘, msg, ‘–‘);
}

console.important = function(msg) {
    console.log(‘ % c % s % s % s’, ‘color: brown; font - weight: bold; text - decoration: underline;’, ‘–‘, msg, ‘–‘);
}

console.todo(“This is something that’ s need to be fixed”);
console.important(‘This is an important message’);

If you really want to level up don't limit your self to the console statement.

Here is a great post on how you can integrate a chrome debugger right into your code editor!

https://hackernoon.com/debugging-react-like-a-champ-with-vscode-66281760037

BadValue Invalid or no user locale set. Please ensure LANG and/or LC_* environment variables are set correctly

you have to add the missing local lang helper: for me the missing ones where de_LU de_LU.UTF-8 . Mongo 2.6.4 worked wihtout mongo 2.6.5 throw an error on this

How to close a thread from within?

A little late, but I use a _is_running variable to tell the thread when I want to close. It's easy to use, just implement a stop() inside your thread class.

def stop(self):
  self._is_running = False

And in run() just loop on while(self._is_running)

How do I disable a jquery-ui draggable?

To temporarily disable the draggable behavior use:

$('#item-id').draggable( "disable" )

To remove the draggable behavior permanently use:

$('#item-id').draggable( "destroy" )

How can I reorder a list?

From what I understand of your question, it appears that you want to apply a permutation that you specify on a list. This is done by specifying another list (lets call it p) that holds the indices of the elements of the original list that should appear in the permuted list. You then use p to make a new list by simply substituting the element at each position by that whose index is in that position in p.

def apply_permutation(lst, p):
    return [lst[x] for x in p]

arr=list("abcde")
new_order=[3,2,0,1,4]

print apply_permutation(arr,new_order)

This prints ['d', 'c', 'a', 'b', 'e'].

This actually creates a new list, but it can be trivially modified to permute the original "in place".

Import PEM into Java Key Store

If you only want to import a certificate in PEM format into a keystore, keytool will do the job:

keytool -import -alias *alias* -keystore cacerts -file *cert.pem*

How to connect Robomongo to MongoDB

I was able to connect Robomongo to a remote instance of MongoDB running on Mongo Labs using the connection string as follows:

Download the latest version of Robomongo. I downloaded 0.9 RC6 from here.
From the connection string, populate the server address and port numbers as follows.
Populate DB name and username and password as follows under the authentication tab.
Test the connection.

Operator overloading on class templates

// In MyClass.h
MyClass<T>& operator+=(const MyClass<T>& classObj);


// In MyClass.cpp
template <class T>
MyClass<T>& MyClass<T>::operator+=(const MyClass<T>& classObj) {
  // ...
  return *this;
}

This is invalid for templates. The full source code of the operator must be in all translation units that it is used in. This typically means that the code is inline in the header.

Edit: Technically, according to the Standard, it is possible to export templates, however very few compilers support it. In addition, you CAN also do the above if the template is explicitly instantiated in MyClass.cpp for all types that are T- but in reality, that normally defies the point of a template.

More edit: I read through your code, and it needs some work, for example overloading operator[]. In addition, typically, I would make the dimensions part of the template parameters, allowing for the failure of + or += to be caught at compile-time, and allowing the type to be meaningfully stack allocated. Your exception class also needs to derive from std::exception. However, none of those involve compile-time errors, they're just not great code.

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

To verify only first letter is number or character -- For number Character.isDigit(str.charAt(0)) --return true

For character Character.isLetter(str.charAt(0)) --return true

A generic list of anonymous class

If you are using C# 7 or above, you can use tuple types instead of anonymous types.

var myList = new List<(int IntProp, string StrProp)>();
myList.Add((IntProp: 123, StrProp: "XYZ"));

Destroy or remove a view in Backbone.js

Without knowing all the information... You could bind a reset trigger to your model or controller:

this.bind("reset", this.updateView);

and when you want to reset the views, trigger a reset.

For your callback, do something like:

updateView: function() {
  view.remove();
  view.render();
};

Send email using the GMail SMTP server from a PHP page

Send Mail using phpMailer library through Gmail Please donwload library files from Github

<?php
/**
 * This example shows settings to use when sending via Google's Gmail servers.
 */
//SMTP needs accurate times, and the PHP time zone MUST be set
//This should be done in your php.ini, but this is how to do it if you don't have access to that
date_default_timezone_set('Etc/UTC');
require '../PHPMailerAutoload.php';
//Create a new PHPMailer instance
$mail = new PHPMailer;
//Tell PHPMailer to use SMTP
$mail->isSMTP();
//Enable SMTP debugging
// 0 = off (for production use)
// 1 = client messages
// 2 = client and server messages
$mail->SMTPDebug = 2;
//Ask for HTML-friendly debug output
$mail->Debugoutput = 'html';
//Set the hostname of the mail server
$mail->Host = 'smtp.gmail.com';
// use
// $mail->Host = gethostbyname('smtp.gmail.com');
// if your network does not support SMTP over IPv6
//Set the SMTP port number - 587 for authenticated TLS, a.k.a. RFC4409 SMTP submission
$mail->Port = 587;
//Set the encryption system to use - ssl (deprecated) or tls
$mail->SMTPSecure = 'tls';
//Whether to use SMTP authentication
$mail->SMTPAuth = true;
//Username to use for SMTP authentication - use full email address for gmail
$mail->Username = "[email protected]";
//Password to use for SMTP authentication
$mail->Password = "yourpassword";
//Set who the message is to be sent from
$mail->setFrom('[email protected]', 'First Last');
//Set an alternative reply-to address
$mail->addReplyTo('[email protected]', 'First Last');
//Set who the message is to be sent to
$mail->addAddress('[email protected]', 'John Doe');
//Set the subject line
$mail->Subject = 'PHPMailer GMail SMTP test';
//Read an HTML message body from an external file, convert referenced images to embedded,
//convert HTML into a basic plain-text alternative body
$mail->msgHTML(file_get_contents('contents.html'), dirname(__FILE__));
//Replace the plain text body with one created manually
$mail->AltBody = 'This is a plain-text message body';
//Attach an image file
$mail->addAttachment('images/phpmailer_mini.png');
//send the message, check for errors
if (!$mail->send()) {
    echo "Mailer Error: " . $mail->ErrorInfo;
} else {
    echo "Message sent!";
}

Laravel whereIn OR whereIn

$query = DB::table('dms_stakeholder_permissions');
$query->select(DB::raw('group_concat(dms_stakeholder_permissions.fid) as fid'),'dms_stakeholder_permissions.rights');
$query->where('dms_stakeholder_permissions.stakeholder_id','4');
$query->orWhere(function($subquery)  use ($stakeholderId){
            $subquery->where('dms_stakeholder_permissions.stakeholder_id',$stakeholderId);
            $subquery->whereIn('dms_stakeholder_permissions.rights',array('1','2','3'));
    });

 $result = $query->get();

return $result;

// OUTPUT @input $stakeholderId = 1

//select group_concat(dms_stakeholder_permissions.fid) as fid, dms_stakeholder_permissionss.rights from dms_stakeholder_permissions where dms_stakeholder_permissions.stakeholder_id = 4 or (dms_stakeholder_permissions.stakeholder_id = 1 and dms_stakeholder_permissions.rights in (1, 2, 3))

How to convert answer into two decimal point

If you have a Decimal or similar numeric type, you can use:

Math.Round(myNumber, 2)

EDIT: So, in your case, it would be:

Public Class Form1
  Private Sub btncalc_Click(ByVal sender As System.Object,
                            ByVal e As System.EventArgs) Handles btncalc.Click
    txtA.Text = Math.Round((Val(txtD.Text) / Val(txtC.Text) * Val(txtF.Text) / Val(txtE.Text)), 2)
    txtB.Text = Math.Round((Val(txtA.Text) * 1000 / Val(txtG.Text)), 2)
  End Sub
End Class

echo key and value of an array without and with loop

for the first question

$key = 'Home';
echo $key." is at ".$page[$key];

usr/bin/ld: cannot find -l<nameOfTheLibrary>

There does not seem to be any answer which addresses the very common beginner problem of failing to install the required library in the first place.

On Debianish platforms, if libfoo is missing, you can frequently install it with something like

apt-get install libfoo-dev

The -dev version of the package is required for development work, even trivial development work such as compiling source code to link to the library.

The package name will sometimes require some decorations (libfoo0-dev? foo-dev without the lib prefix? etc), or you can simply use your distro's package search to find out precisely which packages provide a particular file.

(If there is more than one, you will need to find out what their differences are. Picking the coolest or the most popular is a common shortcut, but not an acceptable procedure for any serious development work.)

For other architectures (most notably RPM) similar procedures apply, though the details will be different.

PreparedStatement with Statement.RETURN_GENERATED_KEYS

You mean something like this?

long key = -1L;

PreparedStatement preparedStatement = connection.prepareStatement(YOUR_SQL_HERE, PreparedStatement.RETURN_GENERATED_KEYS);
preparedStatement.setXXX(index, VALUE);
preparedStatement.executeUpdate();

ResultSet rs = preparedStatement.getGeneratedKeys();

if (rs.next()) {
    key = rs.getLong(1);
}

How to save a new sheet in an existing excel file, using Pandas?

Can do it without using ExcelWriter, using tools in openpyxl This can make adding fonts to the new sheet much easier using openpyxl.styles

import pandas as pd
from openpyxl import load_workbook
from openpyxl.utils.dataframe import dataframe_to_rows

#Location of original excel sheet
fileLocation =r'C:\workspace\data.xlsx'

#Location of new file which can be the same as original file
writeLocation=r'C:\workspace\dataNew.xlsx'

data = {'Name':['Tom','Paul','Jeremy'],'Age':[32,43,34],'Salary':[20000,34000,32000]}

#The dataframe you want to add
df = pd.DataFrame(data)

#Load existing sheet as it is
book = load_workbook(fileLocation)
#create a new sheet
sheet = book.create_sheet("Sheet Name")

#Load dataframe into new sheet
for row in dataframe_to_rows(df, index=False, header=True):
    sheet.append(row)

#Save the modified excel at desired location    
book.save(writeLocation)

Merge up to a specific commit

Recently we had a similar problem and had to solve it in a different way. We had to merge two branches up to two commits, which were not the heads of either branches:

branch A: A1 -> A2 -> A3 -> A4
branch B: B1 -> B2 -> B3 -> B4
branch C: C1 -> A2 -> B3 -> C2

For example, we had to merge branch A up to A2 and branch B up to B3. But branch C had cherry-picks from A and B. When using the SHA of A2 and B3 it looked like there was confusion because of the local branch C which had the same SHA.

To avoid any kind of ambiguity we removed branch C locally, and then created a branch AA starting from commit A2:

git co A
git co SHA-of-A2
git co -b AA

Then we created a branch BB from commit B3:

git co B
git co SHA-of-B3
git co -b BB

At that point we merged the two branches AA and BB. By removing branch C and then referencing the branches instead of the commits it worked.

It's not clear to me how much of this was superstition or what actually made it work, but this "long approach" may be helpful.

How to use struct timeval to get the execution time?

You have two typing errors in your code:

 struct timeval,

should be

 struct timeval

and after the printf() parenthesis you need a semicolon.

Also, depending on the compiler, so simple a cycle might just be optimized out, giving you a time of 0 microseconds whatever you do.

Finally, the time calculation is wrong. You only take into accounts the seconds, ignoring the microseconds. You need to get the difference between seconds, multiply by one million, then add "after" tv_usec and subtract "before" tv_usec. You gain nothing by casting an integer number of seconds to a float.

I'd suggest checking out the man page for struct timeval.

This is the code:

#include <stdio.h>
#include <sys/time.h>

int main (int argc, char** argv) {
    struct timeval tvalBefore, tvalAfter;  // removed comma

    gettimeofday (&tvalBefore, NULL);
    int i =0;
    while ( i < 10000) {
        i ++;
    }

    gettimeofday (&tvalAfter, NULL);

    // Changed format to long int (%ld), changed time calculation

    printf("Time in microseconds: %ld microseconds\n",
            ((tvalAfter.tv_sec - tvalBefore.tv_sec)*1000000L
           +tvalAfter.tv_usec) - tvalBefore.tv_usec
          ); // Added semicolon
    return 0;
}

How to remove all options from a dropdown using jQuery / JavaScript

Other approach for Vanilla JavaScript:

for(var o of document.querySelectorAll('#models > option')) {
  o.remove()
}

How can I get the UUID of my Android phone in an application?

As Dave Webb mentions, the Android Developer Blog has an article that covers this. Their preferred solution is to track app installs rather than devices, and that will work well for most use cases. The blog post will show you the necessary code to make that work, and I recommend you check it out.

However, the blog post goes on to discuss solutions if you need a device identifier rather than an app installation identifier. I spoke with someone at Google to get some additional clarification on a few items in the event that you need to do so. Here's what I discovered about device identifiers that's NOT mentioned in the aforementioned blog post:

ANDROID_ID is the preferred device identifier. ANDROID_ID is perfectly reliable on versions of Android <=2.1 or >=2.3. Only 2.2 has the problems mentioned in the post.
Several devices by several manufacturers are affected by the ANDROID_ID bug in 2.2.
As far as I've been able to determine, all affected devices have the same ANDROID_ID, which is 9774d56d682e549c. Which is also the same device id reported by the emulator, btw.
Google believes that OEMs have patched the issue for many or most of their devices, but I was able to verify that as of the beginning of April 2011, at least, it's still quite easy to find devices that have the broken ANDROID_ID.
When a device has multiple users (available on certain devices running Android 4.2 or higher), each user appears as a completely separate device, so the ANDROID_ID value is unique to each user.

Based on Google's recommendations, I implemented a class that will generate a unique UUID for each device, using ANDROID_ID as the seed where appropriate, falling back on TelephonyManager.getDeviceId() as necessary, and if that fails, resorting to a randomly generated unique UUID that is persisted across app restarts (but not app re-installations).

Note that for devices that have to fallback on the device ID, the unique ID WILL persist across factory resets. This is something to be aware of. If you need to ensure that a factory reset will reset your unique ID, you may want to consider falling back directly to the random UUID instead of the device ID.

Again, this code is for a device ID, not an app installation ID. For most situations, an app installation ID is probably what you're looking for. But if you do need a device ID, then the following code will probably work for you.

import android.content.Context;
import android.content.SharedPreferences;
import android.provider.Settings.Secure;
import android.telephony.TelephonyManager;

import java.io.UnsupportedEncodingException;
import java.util.UUID;

public class DeviceUuidFactory {
    protected static final String PREFS_FILE = "device_id.xml";
    protected static final String PREFS_DEVICE_ID = "device_id";

    protected static UUID uuid;



    public DeviceUuidFactory(Context context) {

        if( uuid ==null ) {
            synchronized (DeviceUuidFactory.class) {
                if( uuid == null) {
                    final SharedPreferences prefs = context.getSharedPreferences( PREFS_FILE, 0);
                    final String id = prefs.getString(PREFS_DEVICE_ID, null );

                    if (id != null) {
                        // Use the ids previously computed and stored in the prefs file
                        uuid = UUID.fromString(id);

                    } else {

                        final String androidId = Secure.getString(context.getContentResolver(), Secure.ANDROID_ID);

                        // Use the Android ID unless it's broken, in which case fallback on deviceId,
                        // unless it's not available, then fallback on a random number which we store
                        // to a prefs file
                        try {
                            if (!"9774d56d682e549c".equals(androidId)) {
                                uuid = UUID.nameUUIDFromBytes(androidId.getBytes("utf8"));
                            } else {
                                final String deviceId = ((TelephonyManager) context.getSystemService( Context.TELEPHONY_SERVICE )).getDeviceId();
                                uuid = deviceId!=null ? UUID.nameUUIDFromBytes(deviceId.getBytes("utf8")) : UUID.randomUUID();
                            }
                        } catch (UnsupportedEncodingException e) {
                            throw new RuntimeException(e);
                        }

                        // Write the value out to the prefs file
                        prefs.edit().putString(PREFS_DEVICE_ID, uuid.toString() ).commit();

                    }

                }
            }
        }

    }


    /**
     * Returns a unique UUID for the current android device.  As with all UUIDs, this unique ID is "very highly likely"
     * to be unique across all Android devices.  Much more so than ANDROID_ID is.
     *
     * The UUID is generated by using ANDROID_ID as the base key if appropriate, falling back on
     * TelephonyManager.getDeviceID() if ANDROID_ID is known to be incorrect, and finally falling back
     * on a random UUID that's persisted to SharedPreferences if getDeviceID() does not return a
     * usable value.
     *
     * In some rare circumstances, this ID may change.  In particular, if the device is factory reset a new device ID
     * may be generated.  In addition, if a user upgrades their phone from certain buggy implementations of Android 2.2
     * to a newer, non-buggy version of Android, the device ID may change.  Or, if a user uninstalls your app on
     * a device that has neither a proper Android ID nor a Device ID, this ID may change on reinstallation.
     *
     * Note that if the code falls back on using TelephonyManager.getDeviceId(), the resulting ID will NOT
     * change after a factory reset.  Something to be aware of.
     *
     * Works around a bug in Android 2.2 for many devices when using ANDROID_ID directly.
     *
     * @see http://code.google.com/p/android/issues/detail?id=10603
     *
     * @return a UUID that may be used to uniquely identify your device for most purposes.
     */
    public UUID getDeviceUuid() {
        return uuid;
    }
}

How to cast ArrayList<> from List<>

Because in the first one , you're trying to convert a collection to an ArrayList. In the 2nd one , you just use the built in constructor of ArrayList

FULL OUTER JOIN vs. FULL JOIN

It's true that some databases recognize the OUTER keyword. Some do not. Where it is recognized, it is usually an optional keyword. Almost always, FULL JOIN and FULL OUTER JOIN do exactly the same thing. (I can't think of an example where they do not. Can anyone else think of one?)

This may leave you wondering, "Why would it even be a keyword if it has no meaning?" The answer boils down to programming style.

In the old days, programmers strived to make their code as compact as possible. Every character meant longer processing time. We used 1, 2, and 3 letter variables. We used 2 digit years. We eliminated all unnecessary white space. Some people still program that way. It's not about processing time anymore. It's more about fast coding.

Modern programmers are learning to use more descriptive variables and put more remarks and documentation into their code. Using extra words like OUTER make sure that other people who read the code will have an easier time understanding it. There will be less ambiguity. This style is much more readable and kinder to the people in the future who will have to maintain that code.

org.hibernate.QueryException: could not resolve property: filename

Hibernate queries are case sensitive with property names (because they end up relying on getter/setter methods on the @Entity).

Make sure you refer to the property as fileName in the Criteria query, not filename.

Specifically, Hibernate will call the getter method of the filename property when executing that Criteria query, so it will look for a method called getFilename(). But the property is called FileName and the getter getFileName().

So, change the projection like so:

criteria.setProjection(Projections.property("fileName"));

"multiple target patterns" Makefile error

I had this problem (colons in the target name) because I had -n in my GREP_OPTIONS environment variable. Apparently, this caused configure to generate the Makefile incorrectly.

Way to insert text having ' (apostrophe) into a SQL table

In SQL, the way to do this is to double the apostrophe:

'he doesn''t work for me'

If you are doing this programmatically, you should use an API that accepts parameters and escapes them for you, like prepared statements or similar, rather that escaping and using string concatenation to assemble a query.

C#: New line and tab characters in strings

Use:

sb.AppendLine();
sb.Append("\t");

for better portability. Environment.NewLine may not necessarily be \n; Windows uses \r\n, for example.

SecurityError: The operation is insecure - window.history.pushState()

In my case I was missing 'www.' from the url I was pushing. It must be exact match, if you're working on www.test.com, you must push to www.test.com and not test.com

How do I kill all the processes in Mysql "show processlist"?

I recently needed to do this and I came up with this

-- GROUP_CONCAT turns all the rows into 1
-- @q:= stores all the kill commands to a variable
select @q:=GROUP_CONCAT(CONCAT('KILL ',ID) SEPARATOR ';')  
FROM information_schema.processlist 
-- If you don't need it, you can remove the WHERE command altogether
WHERE user = 'user';
-- Creates statement and execute it
PREPARE stmt FROM @q;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

That way, you don't need to store to file and run all queries with a single command.

MySQL How do you INSERT INTO a table with a SELECT subquery returning multiple rows?

How can I correctly format currency using jquery?

JQUERY FORMATCURRENCY PLUGIN
http://code.google.com/p/jquery-formatcurrency/

creating an array of structs in c++

It works perfectly. I have gcc compiler C++11 ready. Try this and you'll see:

#include <iostream>

using namespace std;

int main()
{
    int pause;

    struct Customer
    {
           int uid;
           string name;
    };

    Customer customerRecords[2];
    customerRecords[0] = {25, "Bob Jones"};
    customerRecords[1] = {26, "Jim Smith"};
    cout << customerRecords[0].uid << " " << customerRecords[0].name << endl;
    cout << customerRecords[1].uid << " " << customerRecords[1].name << endl;
    cin >> pause;
return 0;
}

Why is MySQL InnoDB insert so slow?

things that speed up the inserts:

i had removed all keys from a table before large insert into empty table
then found i had a problem that the index did not fit in memory.
also found i had sync_binlog=0 (should be 1) even if binlog is not used.
also found i did not set innodb_buffer_pool_instances

Regular Expression to get all characters before "-"

I dont think you need regex to achieve this. I would look at the SubString method along with the indexOf method. If you need more help, add a comment showing what you have attempted and I will offer more help.

Suppress Scientific Notation in Numpy When Creating Array From Nested List

You could write a function that converts a scientific notation to regular, something like

def sc2std(x):
    s = str(x)
    if 'e' in s:
        num,ex = s.split('e')
        if '-' in num:
            negprefix = '-'
        else:
            negprefix = ''
        num = num.replace('-','')
        if '.' in num:
            dotlocation = num.index('.')
        else:
            dotlocation = len(num)
        newdotlocation = dotlocation + int(ex)
        num = num.replace('.','')
        if (newdotlocation < 1):
            return negprefix+'0.'+'0'*(-newdotlocation)+num
        if (newdotlocation > len(num)):
            return negprefix+ num + '0'*(newdotlocation - len(num))+'.0'
        return negprefix + num[:newdotlocation] + '.' + num[newdotlocation:]
    else:
        return s

How to pass multiple parameter to @Directives (@Components) in Angular with TypeScript?

Similar to the above solutions I used @Input() in a directive and able to pass multiple arrays of values in the directive.

selector: '[selectorHere]',

@Input() options: any = {};

Input.html

<input selectorHere [options]="selectorArray" />

Array from TS file

selectorArray= {
  align: 'left',
  prefix: '$',
  thousands: ',',
  decimal: '.',
  precision: 2
};

Error message: (provider: Shared Memory Provider, error: 0 - No process is on the other end of the pipe.)

I had the same error by in SQL Server Management Studio.

I found that to look at the more specific error, look at the log file created by the SQL Server. When I opened the log file, I found this error

Could not connect because the maximum number of ’2' user connections has already been reached. The system administrator can use sp_configure to increase the maximum value. The connection has been closed

I spend quite some time figuring this out. Finally running the following code fixed my problem.

sp_configure 'show advanced options', 1;
go

reconfigure
go

sp_configure 'user connections', 0
go

reconfigure
go

Edit

To view logs search for "logs" on windows startup button, click "view events logs". From there go to Applications under "Windows Logs". You can also choose "System" logs to see system wise errors. You can use filter on current logs by clicking "Filter Current Logs" on right side and then select "Error checkbox".

How to use glOrtho() in OpenGL?

Minimal runnable example

glOrtho: 2D games, objects close and far appear the same size:

glFrustrum: more real-life like 3D, identical objects further away appear smaller:

main.c

#include <stdlib.h>

#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glut.h>

static int ortho = 0;

static void display(void) {
    glClear(GL_COLOR_BUFFER_BIT);
    glLoadIdentity();
    if (ortho) {
    } else {
        /* This only rotates and translates the world around to look like the camera moved. */
        gluLookAt(0.0, 0.0, -3.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
    }
    glColor3f(1.0f, 1.0f, 1.0f);
    glutWireCube(2);
    glFlush();
}

static void reshape(int w, int h) {
    glViewport(0, 0, w, h);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    if (ortho) {
        glOrtho(-2.0, 2.0, -2.0, 2.0, -1.5, 1.5);
    } else {
        glFrustum(-1.0, 1.0, -1.0, 1.0, 1.5, 20.0);
    }
    glMatrixMode(GL_MODELVIEW);
}

int main(int argc, char** argv) {
    glutInit(&argc, argv);
    if (argc > 1) {
        ortho = 1;
    }
    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
    glutInitWindowSize(500, 500);
    glutInitWindowPosition(100, 100);
    glutCreateWindow(argv[0]);
    glClearColor(0.0, 0.0, 0.0, 0.0);
    glShadeModel(GL_FLAT);
    glutDisplayFunc(display);
    glutReshapeFunc(reshape);
    glutMainLoop();
    return EXIT_SUCCESS;
}

GitHub upstream.

Compile:

gcc -ggdb3 -O0 -o main -std=c99 -Wall -Wextra -pedantic main.c -lGL -lGLU -lglut

Run with glOrtho:

./main 1

Run with glFrustrum:

./main

Tested on Ubuntu 18.10.

Schema

Ortho: camera is a plane, visible volume a rectangle:

Frustrum: camera is a point,visible volume a slice of a pyramid:

Image source.

Parameters

We are always looking from +z to -z with +y upwards:

glOrtho(left, right, bottom, top, near, far)

left: minimum x we see
right: maximum x we see
bottom: minimum y we see
top: maximum y we see
-near: minimum z we see. Yes, this is -1 times near. So a negative input means positive z.
-far: maximum z we see. Also negative.

Schema:

Image source.

How it works under the hood

In the end, OpenGL always "uses":

glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);

If we use neither glOrtho nor glFrustrum, that is what we get.

glOrtho and glFrustrum are just linear transformations (AKA matrix multiplication) such that:

glOrtho: takes a given 3D rectangle into the default cube
glFrustrum: takes a given pyramid section into the default cube

This transformation is then applied to all vertexes. This is what I mean in 2D:

Image source.

The final step after transformation is simple:

remove any points outside of the cube (culling): just ensure that x, y and z are in [-1, +1]
ignore the z component and take only x and y, which now can be put into a 2D screen

With glOrtho, z is ignored, so you might as well always use 0.

One reason you might want to use z != 0 is to make sprites hide the background with the depth buffer.

Deprecation

glOrtho is deprecated as of OpenGL 4.5: the compatibility profile 12.1. "FIXED-FUNCTION VERTEX TRANSFORMATIONS" is in red.

So don't use it for production. In any case, understanding it is a good way to get some OpenGL insight.

Modern OpenGL 4 programs calculate the transformation matrix (which is small) on the CPU, and then give the matrix and all points to be transformed to OpenGL, which can do the thousands of matrix multiplications for different points really fast in parallel.

Manually written vertex shaders then do the multiplication explicitly, usually with the convenient vector data types of the OpenGL Shading Language.

Since you write the shader explicitly, this allows you to tweak the algorithm to your needs. Such flexibility is a major feature of more modern GPUs, which unlike the old ones that did a fixed algorithm with some input parameters, can now do arbitrary computations. See also: https://stackoverflow.com/a/36211337/895245

With an explicit GLfloat transform[] it would look something like this:

glfw_transform.c

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

#define GLEW_STATIC
#include <GL/glew.h>

#include <GLFW/glfw3.h>

static const GLuint WIDTH = 800;
static const GLuint HEIGHT = 600;
/* ourColor is passed on to the fragment shader. */
static const GLchar* vertex_shader_source =
    "#version 330 core\n"
    "layout (location = 0) in vec3 position;\n"
    "layout (location = 1) in vec3 color;\n"
    "out vec3 ourColor;\n"
    "uniform mat4 transform;\n"
    "void main() {\n"
    "    gl_Position = transform * vec4(position, 1.0f);\n"
    "    ourColor = color;\n"
    "}\n";
static const GLchar* fragment_shader_source =
    "#version 330 core\n"
    "in vec3 ourColor;\n"
    "out vec4 color;\n"
    "void main() {\n"
    "    color = vec4(ourColor, 1.0f);\n"
    "}\n";
static GLfloat vertices[] = {
/*   Positions          Colors */
     0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f,
    -0.5f, -0.5f, 0.0f, 0.0f, 1.0f, 0.0f,
     0.0f,  0.5f, 0.0f, 0.0f, 0.0f, 1.0f
};

/* Build and compile shader program, return its ID. */
GLuint common_get_shader_program(
    const char *vertex_shader_source,
    const char *fragment_shader_source
) {
    GLchar *log = NULL;
    GLint log_length, success;
    GLuint fragment_shader, program, vertex_shader;

    /* Vertex shader */
    vertex_shader = glCreateShader(GL_VERTEX_SHADER);
    glShaderSource(vertex_shader, 1, &vertex_shader_source, NULL);
    glCompileShader(vertex_shader);
    glGetShaderiv(vertex_shader, GL_COMPILE_STATUS, &success);
    glGetShaderiv(vertex_shader, GL_INFO_LOG_LENGTH, &log_length);
    log = malloc(log_length);
    if (log_length > 0) {
        glGetShaderInfoLog(vertex_shader, log_length, NULL, log);
        printf("vertex shader log:\n\n%s\n", log);
    }
    if (!success) {
        printf("vertex shader compile error\n");
        exit(EXIT_FAILURE);
    }

    /* Fragment shader */
    fragment_shader = glCreateShader(GL_FRAGMENT_SHADER);
    glShaderSource(fragment_shader, 1, &fragment_shader_source, NULL);
    glCompileShader(fragment_shader);
    glGetShaderiv(fragment_shader, GL_COMPILE_STATUS, &success);
    glGetShaderiv(fragment_shader, GL_INFO_LOG_LENGTH, &log_length);
    if (log_length > 0) {
        log = realloc(log, log_length);
        glGetShaderInfoLog(fragment_shader, log_length, NULL, log);
        printf("fragment shader log:\n\n%s\n", log);
    }
    if (!success) {
        printf("fragment shader compile error\n");
        exit(EXIT_FAILURE);
    }

    /* Link shaders */
    program = glCreateProgram();
    glAttachShader(program, vertex_shader);
    glAttachShader(program, fragment_shader);
    glLinkProgram(program);
    glGetProgramiv(program, GL_LINK_STATUS, &success);
    glGetProgramiv(program, GL_INFO_LOG_LENGTH, &log_length);
    if (log_length > 0) {
        log = realloc(log, log_length);
        glGetProgramInfoLog(program, log_length, NULL, log);
        printf("shader link log:\n\n%s\n", log);
    }
    if (!success) {
        printf("shader link error");
        exit(EXIT_FAILURE);
    }

    /* Cleanup. */
    free(log);
    glDeleteShader(vertex_shader);
    glDeleteShader(fragment_shader);
    return program;
}

int main(void) {
    GLint shader_program;
    GLint transform_location;
    GLuint vbo;
    GLuint vao;
    GLFWwindow* window;
    double time;

    glfwInit();
    window = glfwCreateWindow(WIDTH, HEIGHT, __FILE__, NULL, NULL);
    glfwMakeContextCurrent(window);
    glewExperimental = GL_TRUE;
    glewInit();
    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
    glViewport(0, 0, WIDTH, HEIGHT);

    shader_program = common_get_shader_program(vertex_shader_source, fragment_shader_source);

    glGenVertexArrays(1, &vao);
    glGenBuffers(1, &vbo);
    glBindVertexArray(vao);
    glBindBuffer(GL_ARRAY_BUFFER, vbo);
    glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
    /* Position attribute */
    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GLfloat), (GLvoid*)0);
    glEnableVertexAttribArray(0);
    /* Color attribute */
    glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GLfloat), (GLvoid*)(3 * sizeof(GLfloat)));
    glEnableVertexAttribArray(1);
    glBindVertexArray(0);

    while (!glfwWindowShouldClose(window)) {
        glfwPollEvents();
        glClear(GL_COLOR_BUFFER_BIT);

        glUseProgram(shader_program);
        transform_location = glGetUniformLocation(shader_program, "transform");
        /* THIS is just a dummy transform. */
        GLfloat transform[] = {
            0.0f, 0.0f, 0.0f, 0.0f,
            0.0f, 0.0f, 0.0f, 0.0f,
            0.0f, 0.0f, 1.0f, 0.0f,
            0.0f, 0.0f, 0.0f, 1.0f,
        };
        time = glfwGetTime();
        transform[0] = 2.0f * sin(time);
        transform[5] = 2.0f * cos(time);
        glUniformMatrix4fv(transform_location, 1, GL_FALSE, transform);

        glBindVertexArray(vao);
        glDrawArrays(GL_TRIANGLES, 0, 3);
        glBindVertexArray(0);
        glfwSwapBuffers(window);
    }
    glDeleteVertexArrays(1, &vao);
    glDeleteBuffers(1, &vbo);
    glfwTerminate();
    return EXIT_SUCCESS;
}

GitHub upstream.

Compile and run:

gcc -ggdb3 -O0 -o glfw_transform.out -std=c99 -Wall -Wextra -pedantic glfw_transform.c -lGL -lGLU -lglut -lGLEW -lglfw -lm
./glfw_transform.out

Output:

The matrix for glOrtho is really simple, composed only of scaling and translation:

scalex, 0,      0,      translatex,
0,      scaley, 0,      translatey,
0,      0,      scalez, translatez,
0,      0,      0,      1

as mentioned in the OpenGL 2 docs.

The glFrustum matrix is not too hard to calculate by hand either, but starts getting annoying. Note how frustum cannot be made up with only scaling and translations like glOrtho, more info at: https://gamedev.stackexchange.com/a/118848/25171

The GLM OpenGL C++ math library is a popular choice for calculating such matrices. http://glm.g-truc.net/0.9.2/api/a00245.html documents both an ortho and frustum operations.

Warning about `$HTTP_RAW_POST_DATA` being deprecated

It turns out that my understanding of the error message was wrong. I'd say it features very poor choice of words. Googling around shown me someone else misunderstood the message exactly like I did - see PHP bug #66763.

After totally unhelpful "This is the way the RMs wanted it to be." response to that bug by Mike, Tyrael explains that setting it to "-1" doesn't make just the warning to go away. It does the right thing, i.e. it completely disables populating the culprit variable. Turns out that having it set to 0 STILL populates data under some circumstances. Talk about bad design! To cite PHP RFC:

Change always_populate_raw_post_data INI setting to accept three values instead of two.

-1: The behavior of master; don't ever populate $GLOBALS[HTTP_RAW_POST_DATA]

0/off/whatever: BC behavior (populate if content-type is not registered or request method is other than POST)

1/on/yes/true: BC behavior (always populate $GLOBALS[HTTP_RAW_POST_DATA])

So yeah, setting it to -1 not only avoids the warning, like the message said, but it also finally disables populating this variable, which is what I wanted.

How to test if a string is basically an integer in quotes using Ruby

Here's my solution:

# /initializers/string.rb
class String
  IntegerRegex = /^(\d)+$/

  def integer?
    !!self.match(IntegerRegex)
  end
end

# any_model_or_controller.rb
'12345'.integer? # true
'asd34'.integer? # false

And here's how it works:

/^(\d)+$/is regex expression for finding digits in any string. You can test your regex expressions and results at http://rubular.com/.
We save it in a constant IntegerRegex to avoid unnecessary memory allocation everytime we use it in the method.
integer? is an interrogative method which should return true or false.
match is a method on string which matches the occurrences as per the given regex expression in argument and return the matched values or nil.
!! converts the result of match method into equivalent boolean.
And declaring the method in existing String class is monkey patching, which doesn't change anything in existing String functionalities, but just adds another method named integer? on any String object.

What is LD_LIBRARY_PATH and how to use it?

My error was also related to not finding the required .so file by a service. I used LD_LIBRARY_PATH variable to priorities the path picked up by the linker to search the required lib.

I copied both service and .so file in a folder and fed it to LD_LIBRARY_PATH variable as

LD_LIBRARY_PATH=. ./service

being in the same folder I have given the above command and it worked.

How to have image and text side by side

It's always worth grouping elements into sections that are relevant. In your case, a parent element that contains two columns;

icon
text.

http://jsfiddle.net/qMdfC/10/

HTML:

<div class='container2'>
    <img src='http://ecx.images-amazon.com/images/I/21-leKb-zsL._SL500_AA300_.png' class='iconDetails' />

    <div class="text">
        <h4>Facebook</h4>
        <p>
            fine location, GPS, coarse location
            <span>0 mins ago</span>
        </p>
    </div>
</div>

CSS:

* {
    padding:0;
    margin:0;
}
.iconDetails {
    margin:0 2%;
    float:left;
    height:40px;
    width:40px;
}
.container2 {
    width:100%;
    height:auto;
    padding:1%;
}
.text {
    float:left;
}
.text h4, .text p {
    width:100%;
    float:left;
    font-size:0.6em;
}
.text p span {
    color:#666;
}

Removing rounded corners from a <select> element in Chrome/Webkit

Eliminating the arrows should be avoided. A solution that preserves the dropdown arrows is to first remove styles from the dropdown:

.myDropdown {
  background-color: #yourbg;
  border-style: none;
}

Then create div directly before the dropdown in your HTML:

<div class="myDiv"></div>
<select class="myDropdown...">...</select>

And style the div like this:

.myDiv {
  background-color: #yourbg;
  border-style: none;
  position: absolute;
  display: inline;
  border: 1px solid #acolor;
}

Display inline will keep the div from going to a new line, position absolute removes it from the flow of the page. The end result is a nice clean underline you can style as you'd like, and your dropdown still behaves as the user would expect.

What is the difference between static_cast<> and C style casting?

Since there are many different kinds of casting each with different semantics, static_cast<> allows you to say "I'm doing a legal conversion from one type to another" like from int to double. A plain C-style cast can mean a lot of things. Are you up/down casting? Are you reinterpreting a pointer?

Install shows error in console: INSTALL FAILED CONFLICTING PROVIDER

Solution 1

Run the app on a physical device instead of the emulator. I encountered this issue and my app didnt have a content provider defined.

Solution 2

In the other instance, i had an instrumented test app installed matching the same applicationId.

To fix the issue i had to run ./gradlew uA - uA short for uninstallAll task.

You can alternatively use the Gradle panel and choose navigate to app\install\uninstallAll task

If you using an emulator, you can wipe out the data

Inserting string at position x of another string

var array = a.split(' '); 
array.splice(position, 0, b);
var output = array.join(' ');

This would be slower, but will take care of the addition of space before and after the an Also, you'll have to change the value of position ( to 2, it's more intuitive now)

Upgrading React version and it's dependencies by reading package.json

you can update all of the dependencies to their latest version by npm update

Attaching a Sass/SCSS to HTML docs

You can not "attach" a SASS/SCSS file to an HTML document.

SASS/SCSS is a CSS preprocessor that runs on the server and compiles to CSS code that your browser understands.

There are client-side alternatives to SASS that can be compiled in the browser using javascript such as LESS CSS, though I advise you compile to CSS for production use.

It's as simple as adding 2 lines of code to your HTML file.

<link rel="stylesheet/less" type="text/css" href="styles.less" />
<script src="less.js" type="text/javascript"></script>

How to include an HTML page into another HTML page without frame/iframe?

Best solution from nginx: http://sysoev.ru/nginx/docs/http/ngx_http_ssi_module.html

Conditional replacement of values in a data.frame

Another option would be to use case_when

require(dplyr)

mutate(df, est = case_when(
    b == 0 ~ (a - 5)/2.53, 
    TRUE   ~ est 
))

This solution becomes even more handy if more than 2 cases need to be distinguished, as it allows to avoid nested if_else constructs.

Spring Boot War deployed to Tomcat

Your Application.java class should extend the SpringBootServletInitializer class ex:

public class Application extends SpringBootServletInitializer {}

Setting DataContext in XAML in WPF

There are several issues here.

You can't assign DataContext as DataContext="{Binding Employee}" because it's a complex object which can't be assigned as string. So you have to use <Window.DataContext></Window.DataContext> syntax.
You assign the class that represents the data context object to the view, not an individual property so {Binding Employee} is invalid here, you just have to specify an object.
Now when you assign data context using valid syntax like below

   <Window.DataContext>
      <local:Employee/>
   </Window.DataContext>

know that you are creating a new instance of the Employee class and assigning it as the data context object. You may well have nothing in default constructor so nothing will show up. But then how do you manage it in code behind file? You have typecast the DataContext.

    private void my_button_Click(object sender, RoutedEventArgs e)
    {
        Employee e = (Employee) DataContext;
    }

A second way is to assign the data context in the code behind file itself. The advantage then is your code behind file already knows it and can work with it.

public partial class MainWindow : Window
{
   Employee employee = new Employee();

   public MainWindow()
   {
       InitializeComponent();

       DataContext = employee;
   }
}

Animate element to auto height with jQuery

I put together something that does exactly what I was looking for and looks great. Using the scrollHeight of an element gets you the height of when it was loaded in the DOM.

_x000D_

 var clickers = document.querySelectorAll('.clicker');_x000D_
    clickers.forEach(clicker => {_x000D_
        clicker.addEventListener('click', function (e) {_x000D_
            var node = e.target.parentNode.childNodes[5];_x000D_
            if (node.style.height == "0px" || node.style.height == "") {_x000D_
                $(node).animate({ height: node.scrollHeight });_x000D_
            }_x000D_
            else {_x000D_
                $(node).animate({ height: 0 });_x000D_
            }_x000D_
        });_x000D_
    });

_x000D_

.answer{_x000D_
        font-size:15px;_x000D_
        color:blue;_x000D_
        height:0px;_x000D_
        overflow:hidden;_x000D_
       _x000D_
    }

_x000D_

 <div class="row" style="padding-top:20px;">_x000D_
                <div class="row" style="border-color:black;border-style:solid;border-radius:4px;border-width:4px;">_x000D_
                    <h1>This is an animation tester?</h1>_x000D_
                    <span class="clicker">click me</span>_x000D_
                    <p class="answer">_x000D_
                        I will be using this to display FAQ's on a website and figure you would like this.  The javascript will allow this to work on all of the FAQ divs made by my razor code.  the Scrollheight is the height of the answer element on the DOM load.  Happy Coding :)_x000D_
                         Lorem ipsum dolor sit amet, mea an quis vidit autem. No mea vide inani efficiantur, mollis admodum accusata id has, eam dolore nemore eu. Mutat partiendo ea usu, pri duis vulputate eu. Vis mazim noluisse oportere id. Cum porro labore in, est accumsan euripidis scripserit ei. Albucius scaevola elaboraret usu eu. Ad sed vivendo persecuti, harum movet instructior eam ei._x000D_
                    </p>_x000D_
                </div>_x000D_
            </div>_x000D_
            <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>

_x000D_

How do you do a ‘Pause’ with PowerShell 2.0?

I think it is worthwhile to recap/summarize the choices here for clarity... then offer a new variation that I believe provides the best utility.

<1> ReadKey (System.Console)

write-host "Press any key to continue..."
[void][System.Console]::ReadKey($true)

Advantage: Accepts any key but properly excludes Shift, Alt, Ctrl modifier keys.
Disadvantage: Does not work in PS-ISE.

<2> ReadKey (RawUI)

Write-Host "Press any key to continue ..."
$x = $host.UI.RawUI.ReadKey("NoEcho,IncludeKeyDown")

Disadvantage: Does not work in PS-ISE.
Disadvantage: Does not exclude modifier keys.

<3> cmd

cmd /c Pause | Out-Null

Disadvantage: Does not work in PS-ISE.
Disadvantage: Visibly launches new shell/window on first use; not noticeable on subsequent use but still has the overhead

<4> Read-Host

Read-Host -Prompt "Press Enter to continue"

Advantage: Works in PS-ISE.
Disadvantage: Accepts only Enter key.

<5> ReadKey composite

This is a composite of <1> above with the ISE workaround/kludge extracted from the proposal on Adam's Tech Blog (courtesy of Nick from earlier comments on this page). I made two slight improvements to the latter: added Test-Path to avoid an error if you use Set-StrictMode (you do, don't you?!) and the final Write-Host to add a newline after your keystroke to put the prompt in the right place.

Function Pause ($Message = "Press any key to continue . . . ") {
    if ((Test-Path variable:psISE) -and $psISE) {
        $Shell = New-Object -ComObject "WScript.Shell"
        $Button = $Shell.Popup("Click OK to continue.", 0, "Script Paused", 0)
    }
    else {     
        Write-Host -NoNewline $Message
        [void][System.Console]::ReadKey($true)
        Write-Host
    }
}

Advantage: Accepts any key but properly excludes Shift, Alt, Ctrl modifier keys.
Advantage: Works in PS-ISE (though only with Enter or mouse click)
Disadvantage: Not a one-liner!

PHP - find entry by object property from an array of objects

Using array_column to re-index will save time if you need to find multiple times:

$lookup = array_column($arr, NULL, 'id');   // re-index by 'id'

Then you can simply $lookup[$id] at will.

Can't connect to local MySQL server through socket '/tmp/mysql.sock

For me, the mysql server was not running. So, i started the mysql server through

mysql.server start

then

mysql_secure_installation

to secure the server and now I can visit the MySQL server through

mysql -u root -p

sudo mysql -u root -p

depending on your installation.

Correct way to convert size in bytes to KB, MB, GB in JavaScript

Here's a one liner:

val => ['Bytes','Kb','Mb','Gb','Tb'][Math.floor(Math.log2(val)/10)]

Or even:

val => 'BKMGT'[~~(Math.log2(val)/10)]

How can I multiply all items in a list together with Python?

My solution:

def multiply(numbers):
    a = 1
    for num in numbers:
        a *= num
        return a

  pass

How do you search an amazon s3 bucket?

Just a note to add on here: it's now 3 years later, yet this post is top in Google when you type in "How to search an S3 Bucket."

Perhaps you're looking for something more complex, but if you landed here trying to figure out how to simply find an object (file) by it's title, it's crazy simple:

open the bucket, select "none" on the right hand side, and start typing in the file name.

http://docs.aws.amazon.com/AmazonS3/latest/UG/ListingObjectsinaBucket.html

2D array values C++

Like this:

int main()
{
    int arr[2][5] =
    {
        {1,8,12,20,25},
        {5,9,13,24,26}
    };
}

This should be covered by your C++ textbook: which one are you using?

Anyway, better, consider using std::vector or some ready-made matrix class e.g. from Boost.

Switch statement for string matching in JavaScript

Just use the location.host property

switch (location.host) {
    case "xxx.local":
        settings = ...
        break;
    case "xxx.dev.yyy.com":
        settings = ...
        break;
}

How does true/false work in PHP?

Since I've visited this page several times, I've decided to post an example (loose) comparison test.

Results:

""        -> false
"0"       -> false
"1"       -> true
"01"      -> true
"abc"     -> true
"true"    -> true
"false"   -> true
0         -> false
0.1       -> true
1         -> true
1.1       -> true
-42       -> true
"NAN"     -> true
0         -> false
          -> true
null      -> false
true      -> true
false     -> false
[]        -> false
["a"]     -> true
{}        -> true
{}        -> true
{"s":"f"} -> true

Code:

class Vegetable {}

class Fruit {
    public $s = "f";
}

$cases = [
    "",
    "0",
    "1",
    "01",
    "abc",
    "true",
    "false",
    0,
    0.1,
    1,
    1.1,
    -42,
    "NAN",
    (float) "NAN",
    NAN,
    null,
    true,
    false,
    [],
    ["a"],
    new stdClass(),
    new Vegetable(),
    new Fruit(),
];

echo "<pre>" . PHP_EOL;

foreach ($cases as $case) {
    printf("%s -> %s" . PHP_EOL, str_pad(json_encode($case), 9, " ", STR_PAD_RIGHT), json_encode( $case == true ));
}

When a strict (===) comparison is done, everything except true returns false.

Replace non-numeric with empty string

You can do it easily with regex:

string subject = "(913)-444-5555";
string result = Regex.Replace(subject, "[^0-9]", ""); // result = "9134445555"

How can I flush GPU memory using CUDA (physical reset is unavailable)

check what is using your GPU memory with

sudo fuser -v /dev/nvidia*

Your output will look something like this:

                     USER        PID  ACCESS COMMAND
/dev/nvidia0:        root       1256  F...m  Xorg
                     username   2057  F...m  compiz
                     username   2759  F...m  chrome
                     username   2777  F...m  chrome
                     username   20450 F...m  python
                     username   20699 F...m  python

Then kill the PID that you no longer need on htop or with

sudo kill -9 PID.

In the example above, Pycharm was eating a lot of memory so I killed 20450 and 20699.

git clone error: RPC failed; curl 56 OpenSSL SSL_read: SSL_ERROR_SYSCALL, errno 10054

I had the exact same problem while trying to setup a Gitlab pipeline executed by a Docker runner installed on a Raspberry Pi 4

Using nload to follow bandwidth usage within Docker runner container while pipeline was cloning the repo i saw the network usage dropped down to a few bytes per seconds..

After a some deeper investigations i figured out that the Raspberry temperature was too high and the network card start to dysfunction above 50° Celsius.

Adding a fan to my Raspberry solved the issue.

How to trim whitespace from a Bash variable?

I've always done it with sed

  var=`hg st -R "$path" | sed -e 's/  *$//'`

If there is a more elegant solution, I hope somebody posts it.

How to remove leading and trailing white spaces from a given html string?

I know this is a very old question but it still doesn't have an accepted answer. I see that you want the following removed: html tags that are "empty" and white spaces based on an html string.

I have come up with a solution based on your comment for the output you are looking for:

Trimming using JavaScript<br /><br /><br /><br />all leading and trailing white spaces

_x000D_

var str = "<p>&nbsp;&nbsp;</p><div>&nbsp;</div>Trimming using JavaScript<br /><br /><br /><br />all leading and trailing white spaces<p>&nbsp;&nbsp;</p><div>&nbsp;</div>";_x000D_
console.log(str.trim().replace(/&nbsp;/g, '').replace(/<[^\/>][^>]*><\/[^>]+>/g, ""));

_x000D_

.trim() removes leading and trailing whitespace

.replace(/ /g, '') removes  

.replace(/<[^\/>][^>]*><\/[^>]+>/g, "")); removes empty tags

Converting HTML files to PDF

You can use a headless firefox with an extension. It's pretty annoying to get running but it does produce good results.

Check out this answer for more info.

Javascript onclick hide div

just add onclick handler for anchor tag

onclick="this.parentNode.style.display = 'none'"

or change onclick handler for img tag

onclick="this.parentNode.parentNode.style.display = 'none'"

How to compare two tables column by column in oracle

Try to use 3rd party tool, such as SQL Data Examiner which compares Oracle databases and shows you differences.

Cassandra cqlsh - connection refused

Check for correct IP address in the cassandra.yaml file. Majority of times the error is due to incorrect IP address of your system also the username and password too.

After doing so initiate cqlsh by the command :-

cqlsh 10.31.79.1 -u cassandra -p cassandra

What does "both" mean in <div style="clear:both">

Both means "every item in a set of two things". The two things being "left" and "right"

How to give Jenkins more heap space when it´s started as a service under Windows?

I've added to /etc/sysconfig/jenkins (CentOS):

# Options to pass to java when running Jenkins.
#
JENKINS_JAVA_OPTIONS="-Djava.awt.headless=true -Xmx1024m -XX:MaxPermSize=512m"

For ubuntu the same config should be located in /etc/default

Handle Button click inside a row in RecyclerView

Just put an override method named getItemId Get it by right click>generate>override methods>getItemId Put this method in the Adapter class

Android WebView progress bar

It's true, there are also more complete option, like changing the name of the app for a sentence you want. Check this tutorial it can help:

http://www.firstdroid.com/2010/08/04/adding-progress-bar-on-webview-android-tutorials/

In that tutorial you have a complete example how to use the progressbar in a webview app.

Adrian.

How to instantiate, initialize and populate an array in TypeScript?

If you would like to 'add' additional items to a page, you may want to create an array of maps. This is how I created an array of maps and then added results to it:

import { Product } from '../models/product';

products: Array<Product>;          // Initialize the array.

[...]

let i = 0;
this.service.products( i , (result) => {

    if ( i == 0 ) {
        // Create the first element of the array.
        this.products = Array(result);
    } else { 
        // Add to the array of maps.
        this.products.push(result);
    }

});

Where product.ts look like...

export class Product {
    id: number;
    [...]
}

Pandas Merging 101

This post will go through the following topics:

how to correctly generalize to multiple DataFrames (and why merge has shortcomings here)
merging on unique keys
merging on non-unqiue keys

_{BACK TO TOP}

Generalizing to multiple DataFrames

Oftentimes, the situation arises when multiple DataFrames are to be merged together. Naively, this can be done by chaining merge calls:

df1.merge(df2, ...).merge(df3, ...)

However, this quickly gets out of hand for many DataFrames. Furthermore, it may be necessary to generalise for an unknown number of DataFrames.

Here I introduce pd.concat for multi-way joins on unique keys, and DataFrame.join for multi-way joins on non-unique keys. First, the setup.

# Setup.
np.random.seed(0)
A = pd.DataFrame({'key': ['A', 'B', 'C', 'D'], 'valueA': np.random.randn(4)})    
B = pd.DataFrame({'key': ['B', 'D', 'E', 'F'], 'valueB': np.random.randn(4)})
C = pd.DataFrame({'key': ['D', 'E', 'J', 'C'], 'valueC': np.ones(4)})
dfs = [A, B, C] 

# Note, the "key" column values are unique, so the index is unique.
A2 = A.set_index('key')
B2 = B.set_index('key')
C2 = C.set_index('key')

dfs2 = [A2, B2, C2]

Multiway merge on unique keys

If your keys (here, the key could either be a column or an index) are unique, then you can use pd.concat. Note that pd.concat joins DataFrames on the index.

# merge on `key` column, you'll need to set the index before concatenating
pd.concat([
    df.set_index('key') for df in dfs], axis=1, join='inner'
).reset_index()

  key    valueA    valueB  valueC
0   D  2.240893 -0.977278     1.0

# merge on `key` index
pd.concat(dfs2, axis=1, sort=False, join='inner')

       valueA    valueB  valueC
key                            
D    2.240893 -0.977278     1.0

Omit join='inner' for a FULL OUTER JOIN. Note that you cannot specify LEFT or RIGHT OUTER joins (if you need these, use join, described below).

Multiway merge on keys with duplicates

concat is fast, but has its shortcomings. It cannot handle duplicates.

A3 = pd.DataFrame({'key': ['A', 'B', 'C', 'D', 'D'], 'valueA': np.random.randn(5)})

pd.concat([df.set_index('key') for df in [A3, B, C]], axis=1, join='inner')
ValueError: Shape of passed values is (3, 4), indices imply (3, 2)

In this situation, we can use join since it can handle non-unique keys (note that join joins DataFrames on their index; it calls merge under the hood and does a LEFT OUTER JOIN unless otherwise specified).

# join on `key` column, set as the index first
# For inner join. For left join, omit the "how" argument.
A.set_index('key').join(
    [df.set_index('key') for df in (B, C)], how='inner').reset_index()

  key    valueA    valueB  valueC
0   D  2.240893 -0.977278     1.0

# join on `key` index
A3.set_index('key').join([B2, C2], how='inner')

       valueA    valueB  valueC
key                            
D    1.454274 -0.977278     1.0
D    0.761038 -0.977278     1.0

Continue Reading

Jump to other topics in Pandas Merging 101 to continue learning:

_{* you are here}

How do I get the find command to print out the file size with the file name?

find . -name "*.ear" | xargs ls -sh

Calling a javascript function recursively

You can access the function itself using arguments.callee ^[MDN]:

if (counter>0) {
    arguments.callee(counter-1);
}

This will break in strict mode, however.

How do you round a floating point number in Perl?

The following will round positive or negative numbers to a given decimal position:

sub round ()
{
    my ($x, $pow10) = @_;
    my $a = 10 ** $pow10;

    return (int($x / $a + (($x < 0) ? -0.5 : 0.5)) * $a);
}

Android notification is not showing

If you are on version >= Android 8.1 (Oreo) while using a Notification channel, set its importance to high:

int importance = NotificationManager.IMPORTANCE_HIGH;
NotificationChannel channel = new NotificationChannel(CHANNEL_ID, name, importance);

Writing to output window of Visual Studio

Where to get this Java.exe file for a SQL Developer installation

you should browse to where java installed, then go to bin directory which contains the java.exe file.

example - C:\Program Files\Java\jdk1.6.0_03\bin\java.exe

but you should run your SQL Developer as Administrator

How can I import Swift code to Objective-C?

There's one caveat if you're importing Swift code into your Objective-C files within the same framework. You have to do it with specifying the framework name and angle brackets:

#import <MyFramework/MyFramework-Swift.h>

MyFramework here is the "Product Module Name" build setting (PRODUCT_NAME = MyFramework).

Simply adding #import "MyFramework-Swift.h" won't work. If you check the built products directory (before such an #import is added, so you've had at least one successful build with some Swift code in the target), then you should still see the file MyFramework-Swift.h in the Headers directory.

Calculate distance between two latitude-longitude points? (Haversine formula)

All the above answers assumes the earth is a sphere. However, a more accurate approximation would be that of an oblate spheroid.

a= 6378.137#equitorial radius in km
b= 6356.752#polar radius in km

def Distance(lat1, lons1, lat2, lons2):
    lat1=math.radians(lat1)
    lons1=math.radians(lons1)
    R1=(((((a**2)*math.cos(lat1))**2)+(((b**2)*math.sin(lat1))**2))/((a*math.cos(lat1))**2+(b*math.sin(lat1))**2))**0.5 #radius of earth at lat1
    x1=R*math.cos(lat1)*math.cos(lons1)
    y1=R*math.cos(lat1)*math.sin(lons1)
    z1=R*math.sin(lat1)

    lat2=math.radians(lat2)
    lons2=math.radians(lons2)
    R1=(((((a**2)*math.cos(lat2))**2)+(((b**2)*math.sin(lat2))**2))/((a*math.cos(lat2))**2+(b*math.sin(lat2))**2))**0.5 #radius of earth at lat2
    x2=R*math.cos(lat2)*math.cos(lons2)
    y2=R*math.cos(lat2)*math.sin(lons2)
    z2=R*math.sin(lat2)

    return ((x1-x2)**2+(y1-y2)**2+(z1-z2)**2)**0.5

Read files from a Folder present in project

it depends where is your Data folder

To get the directory where the .exe file is:

AppDomain.CurrentDomain.BaseDirectory

To get the current directory:

Environment.CurrentDirectory

Then you can concatenate your directory path (@"\Data\Names.txt")

Chrome/jQuery Uncaught RangeError: Maximum call stack size exceeded

I recently just ran into this issue as well. I had a very large table in the dialog div. It was >15,000 rows. When the .empty() was called on the dialog div, I was getting the error above.

I found a round-about solution where before I call cleaning the dialog box, I would remove every other row from the very large table, then call the .empty(). It seemed to have worked though. It seems that my old version of JQuery can't handle such large elements.

How to correctly set the ORACLE_HOME variable on Ubuntu 9.x?

ORACLE_HOME needs to be at the top level of the Oracle directory structure for the database installation. From that point, Oracle knows how to find all the other files it needs. For example, the error message you get is because Oracle can't locate the message files to report errors with (should be in the various mesg directories below the oracle home. Instead of the above value you give, I would try

export ORACLE_HOME=/usr/lib/oracle/xe/app/oracle/product/10.2.0

CreateProcess error=2, The system cannot find the file specified

I used ProcessBuilder but had the same issue. The issue was with using command as one String line (like I would type it in cmd) instead of String array. In example from above. If I ran

ProcessBuilder pb = new ProcessBuilder("C:/Program Files/WinRAR/winrar x myjar.jar *.* new");
pb.directory(new File("H:/"));
pb. redirectErrorStream(true);

Process p = pb.start();

I got an error. But if I ran

ProcessBuilder pb = new ProcessBuilder("C:/Program Files/WinRAR/winrar", "x", "myjar.jar", "*.*", "new");
pb.directory(new File("H:/"));
pb. redirectErrorStream(true);

Process p = pb.start();

everything was OK.

What exactly is a Maven Snapshot and why do we need it?

A Maven SNAPSHOT is an artifact created by a Maven build and pretends to help developers in the software development cycle. A SNAPSHOT is an artifact (or project build result ) that is not pretended to be used anywhere, it's only a temporarily .jar, ear, ... created to test the build process or to test new requirements that are not yet ready to go to a production environment. After you are happy with the SNAPSHOT artifact quality, you can create a RELEASE artifact that can be used by other projects or can be deployed itself.

In your project, you can define a SNAPSHOT using the version element in the pom.xml file of Maven:

<groupId>example.project.maven</groupId>
<artifactId>MavenEclipseExample</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<description>Maven pom example</description>

If you want to understand better Maven you can look into these articles too:

https://connected2know.com/programming/menu-maven-articles/

Find most frequent value in SQL column

Below query seems to work good for me in SQL Server database:

select column, COUNT(column) AS MOST_FREQUENT
from TABLE_NAME
GROUP BY column
ORDER BY COUNT(column) DESC

Result:

column          MOST_FREQUENT
item1           highest count
item2           second highest 
item3           third higest
..
..

Using only CSS, show div on hover over <a>

Don't forget. if you are trying to hover around an image, you have to put it around a container. css:

.brand:hover + .brand-sales {
    display: block;
}

.brand-sales {
    display: none;
}

If you hover on this:

<span className="brand">
   <img src="https://murmure.me/wp-content/uploads/2017/10/nike-square-1900x1900.jpg" 
     alt"some image class="product-card-place-logo"/>
</span>

This will show:

<div class="product-card-sales-container brand-sales">
    <div class="product-card-">Message from the business goes here. They can talk alot or not</div>
</div>

Getting DOM node from React child element

This may be possible by using the refs attribute.

In the example of wanting to to reach a <div> what you would want to do is use is <div ref="myExample">. Then you would be able to get that DOM node by using React.findDOMNode(this.refs.myExample).

From there getting the correct DOM node of each child may be as simple as mapping over this.refs.myExample.children(I haven't tested that yet) but you'll at least be able to grab any specific mounted child node by using the ref attribute.

Here's the official react documentation on refs for more info.

Where is Developer Command Prompt for VS2013?

Visual studio command prompt is nothing but the regular command prompt where few environment variables are set by default. This variables are set in the batch script : C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\Tools\VsDevCmd.bat . So basically to get a visual studio command prompt for a particular version, just open regular command prompt and run this batch script : C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\Tools\VsDevCmd.bat (Change the visual studio version based on your installed version). Voila you have got the visual studio command prompt. You can write a script to run the batch file and open cmd.exe.

Python: import module from another directory at the same level in project hierarchy

From Python 2.5 onwards, you can use

from ..Modules import LDAPManager

The leading period takes you "up" a level in your heirarchy.

See the Python docs on intra-package references for imports.

What is the best way to dump entire objects to a log in C#?

I found a library called ObjectPrinter which allows to easily dump objects and collections to strings (and more). It does exactly what I needed.

Bootstrap Element 100% Width

I'd wonder why someone would try to "override" the container width, since its purpose is to keep its content with some padding, but I had a similar situation (that's why I wanted to share my solution, even though there're answers).

In my situation, I wanted to have all content (of all pages) rendered inside a container, so this was the piece of code from my _Layout.cshtml:

<div id="body">

    @RenderSection("featured", required: false)

    <section class="content-wrapper main-content clear-fix">
        <div class="container">
            @RenderBody()
        </div>
    </section>
</div>

In my Home Index page, I had a background header image I'd like to fill the whole screen width, so the solution was to make the Index.cshtml like this:

@section featured {
<!-- This content will be rendered outside the "container div" -->
<div class="intro-header">
    <div class="container">SOME CONTENT WITH A NICE BACKGROUND</div>
</div>
}

<!-- The content below will be rendered INSIDE the "container div" -->
<div class="content-section-b">
    <div class="container">
        <div class="row">
          MORE CONTENT
        </div>
    </div>
</div>

I think this is better than trying to make workarounds, since sections are made with the purpose of allowing (or forcing) views to dynamically replace some content in the layout.

Changing upload_max_filesize on PHP

You can't use shorthand notation to set configuration values outside of PHP.ini. I assume it's falling back to 2MB as the compiled default when confronted with a bad value.

On the other hand, I don't think upload_max_filesize could be set using ini_set(). The "official" list states that it is PHP_INI_PERDIR .

What are Runtime.getRuntime().totalMemory() and freeMemory()?

Codified version of all other answers (at the time of writing):

import java.io.*;

/**
 * This class is based on <a href="http://stackoverflow.com/users/2478930/cheneym">cheneym</a>'s
 * <a href="http://stackoverflow.com/a/18375641/253468">awesome interpretation</a>
 * of the Java {@link Runtime}'s memory query methods, which reflects intuitive thinking.
 * Also includes comments and observations from others on the same question, and my own experience.
 * <p>
 * <img src="https://i.stack.imgur.com/GjuwM.png" alt="Runtime's memory interpretation">
 * <p>
 * <b>JVM memory management crash course</b>:
 * Java virtual machine process' heap size is bounded by the maximum memory allowed.
 * The startup and maximum size can be configured by JVM arguments.
 * JVMs don't allocate the maximum memory on startup as the program running may never require that.
 * This is to be a good player and not waste system resources unnecessarily.
 * Instead they allocate some memory and then grow when new allocations require it.
 * The garbage collector will be run at times to clean up unused objects to prevent this growing.
 * Many parameters of this management such as when to grow/shrink or which GC to use
 * can be tuned via advanced configuration parameters on JVM startup.
 *
 * @see <a href="http://stackoverflow.com/a/42567450/253468">
 *     What are Runtime.getRuntime().totalMemory() and freeMemory()?</a>
 * @see <a href="http://www.oracle.com/technetwork/java/javase/memorymanagement-whitepaper-150215.pdf">
 *     Memory Management in the Sun Java HotSpot™ Virtual Machine</a>
 * @see <a href="http://docs.oracle.com/javase/8/docs/technotes/tools/windows/java.html">
 *     Full VM options reference for Windows</a>
 * @see <a href="http://docs.oracle.com/javase/8/docs/technotes/tools/unix/java.html">
 *     Full VM options reference for Linux, Mac OS X and Solaris</a>
 * @see <a href="http://www.oracle.com/technetwork/articles/java/vmoptions-jsp-140102.html">
 *     Java HotSpot VM Options quick reference</a>
 */
public class SystemMemory {

    // can be white-box mocked for testing
    private final Runtime runtime = Runtime.getRuntime();

    /**
     * <b>Total allocated memory</b>: space currently reserved for the JVM heap within the process.
     * <p>
     * <i>Caution</i>: this is not the total memory, the JVM may grow the heap for new allocations.
     */
    public long getAllocatedTotal() {
        return runtime.totalMemory();
    }

    /**
     * <b>Current allocated free memory</b>: space immediately ready for new objects.
     * <p>
     * <i>Caution</i>: this is not the total free available memory,
     * the JVM may grow the heap for new allocations.
     */
    public long getAllocatedFree() {
        return runtime.freeMemory();
    }

    /**
     * <b>Used memory</b>:
     * Java heap currently used by instantiated objects. 
     * <p>
     * <i>Caution</i>: May include no longer referenced objects, soft references, etc.
     * that will be swept away by the next garbage collection.
     */
    public long getUsed() {
        return getAllocatedTotal() - getAllocatedFree();
    }

    /**
     * <b>Maximum allocation</b>: the process' allocated memory will not grow any further.
     * <p>
     * <i>Caution</i>: This may change over time, do not cache it!
     * There are some JVMs / garbage collectors that can shrink the allocated process memory.
     * <p>
     * <i>Caution</i>: If this is true, the JVM will likely run GC more often.
     */
    public boolean isAtMaximumAllocation() {
        return getAllocatedTotal() == getTotal();
        // = return getUnallocated() == 0;
    }

    /**
     * <b>Unallocated memory</b>: amount of space the process' heap can grow.
     */
    public long getUnallocated() {
        return getTotal() - getAllocatedTotal();
    }

    /**
     * <b>Total designated memory</b>: this will equal the configured {@code -Xmx} value.
     * <p>
     * <i>Caution</i>: You can never allocate more memory than this, unless you use native code.
     */
    public long getTotal() {
        return runtime.maxMemory();
    }

    /**
     * <b>Total free memory</b>: memory available for new Objects,
     * even at the cost of growing the allocated memory of the process.
     */
    public long getFree() {
        return getTotal() - getUsed();
        // = return getAllocatedFree() + getUnallocated();
    }

    /**
     * <b>Unbounded memory</b>: there is no inherent limit on free memory.
     */
    public boolean isBounded() {
        return getTotal() != Long.MAX_VALUE;
    }

    /**
     * Dump of the current state for debugging or understanding the memory divisions.
     * <p>
     * <i>Caution</i>: Numbers may not match up exactly as state may change during the call.
     */
    public String getCurrentStats() {
        StringWriter backing = new StringWriter();
        PrintWriter out = new PrintWriter(backing, false);
        out.printf("Total: allocated %,d (%.1f%%) out of possible %,d; %s, %s %,d%n",
                getAllocatedTotal(),
                (float)getAllocatedTotal() / (float)getTotal() * 100,
                getTotal(),
                isBounded()? "bounded" : "unbounded",
                isAtMaximumAllocation()? "maxed out" : "can grow",
                getUnallocated()
        );
        out.printf("Used: %,d; %.1f%% of total (%,d); %.1f%% of allocated (%,d)%n",
                getUsed(),
                (float)getUsed() / (float)getTotal() * 100,
                getTotal(),
                (float)getUsed() / (float)getAllocatedTotal() * 100,
                getAllocatedTotal()
        );
        out.printf("Free: %,d (%.1f%%) out of %,d total; %,d (%.1f%%) out of %,d allocated%n",
                getFree(),
                (float)getFree() / (float)getTotal() * 100,
                getTotal(),
                getAllocatedFree(),
                (float)getAllocatedFree() / (float)getAllocatedTotal() * 100,
                getAllocatedTotal()
        );
        out.flush();
        return backing.toString();
    }

    public static void main(String... args) {
        SystemMemory memory = new SystemMemory();
        System.out.println(memory.getCurrentStats());
    }
}

Bootstrap collapse animation not smooth

For others like me who had a different but similar issue where the animation was not occurring at all:

From what I could find it may be something in my browser setting which preferred less motion for accessibility purposes. I could not find any setting in my browser, but I was able to get the animation working by downloading a local copy of bootstrap and commenting out this section of the CSS file:

@media (prefers-reduced-motion: reduce) {
  .collapsing {
    -webkit-transition: none;
    transition: none;
  }
}

Jackson - best way writes a java list to a json array

In objectMapper we have writeValueAsString() which accepts object as parameter. We can pass object list as parameter get the string back.

List<Apartment> aptList =  new ArrayList<Apartment>();
    Apartment aptmt = null;
    for(int i=0;i<5;i++){
         aptmt= new Apartment();
         aptmt.setAptName("Apartment Name : ArrowHead Ranch");
         aptmt.setAptNum("3153"+i);
         aptmt.setPhase((i+1));
         aptmt.setFloorLevel(i+2);
         aptList.add(aptmt);
    }
mapper.writeValueAsString(aptList)

Show git diff on file in staging area

In order to see the changes that have been staged already, you can pass the -–staged option to git diff (in pre-1.6 versions of Git, use –-cached).

git diff --staged
git diff --cached

Set value to NULL in MySQL

How do you get a string from a MemoryStream?

A slightly modified version of Brian's answer allows optional management of read start, This seems to be the easiest method. probably not the most efficient, but easy to understand and use.

Public Function ReadAll(ByVal memStream As MemoryStream, Optional ByVal startPos As Integer = 0) As String
    ' reset the stream or we'll get an empty string returned
    ' remember the position so we can restore it later
    Dim Pos = memStream.Position
    memStream.Position = startPos

    Dim reader As New StreamReader(memStream)
    Dim str = reader.ReadToEnd()

    ' reset the position so that subsequent writes are correct
    memStream.Position = Pos

    Return str
End Function

jQuery checkbox onChange

There is no need to use :checkbox, also replace #activelist with #inactivelist:

$('#inactivelist').change(function () {
    alert('changed');
 });

Javascript getElementsByName.value not working

Here is the example for having one or more checkboxes value. If you have two or more checkboxes and need values then this would really help.

_x000D_

function myFunction() {_x000D_
  var selchbox = [];_x000D_
  var inputfields = document.getElementsByName("myCheck");_x000D_
  var ar_inputflds = inputfields.length;_x000D_
_x000D_
  for (var i = 0; i < ar_inputflds; i++) {_x000D_
    if (inputfields[i].type == 'checkbox' && inputfields[i].checked == true)_x000D_
      selchbox.push(inputfields[i].value);_x000D_
  }_x000D_
  return selchbox;_x000D_
_x000D_
}_x000D_
_x000D_
document.getElementById('btntest').onclick = function() {_x000D_
  var selchb = myFunction();_x000D_
  console.log(selchb);_x000D_
}

_x000D_

Checkbox:_x000D_
<input type="checkbox" name="myCheck" value="UK">United Kingdom_x000D_
<input type="checkbox" name="myCheck" value="USA">United States_x000D_
<input type="checkbox" name="myCheck" value="IL">Illinois_x000D_
<input type="checkbox" name="myCheck" value="MA">Massachusetts_x000D_
<input type="checkbox" name="myCheck" value="UT">Utah_x000D_
_x000D_
<input type="button" value="Click" id="btntest" />

_x000D_

Jquery to change form action

Use jQuery.attr() in your click handler:

$("#myform").attr('action', 'page1.php');

annotation to make a private method public only for test classes

I just put the test in the class itself by making it an inner class: https://rogerkeays.com/how-to-unit-test-private-methods

How to do a SOAP wsdl web services call from the command line

For Windows I found this working:

Set http = CreateObject("Microsoft.XmlHttp")
http.open "GET", "http://www.mywebservice.com/webmethod.asmx?WSDL", FALSE
http.send ""
WScript.Echo http.responseText

Reference: CodeProject

Possible heap pollution via varargs parameter

The reason is because varargs give the option of being called with a non-parametrized object array. So if your type was List < A > ... , it can also be called with List[] non-varargs type.

Here is an example:

public static void testCode(){
    List[] b = new List[1];
    test(b);
}

@SafeVarargs
public static void test(List<A>... a){
}

As you can see List[] b can contain any type of consumer, and yet this code compiles. If you use varargs, then you are fine, but if you use the method definition after type-erasure - void test(List[]) - then the compiler will not check the template parameter types. @SafeVarargs will suppress this warning.

Combining (concatenating) date and time into a datetime

The simple solution

SELECT CAST(CollectionDate as DATETIME) + CAST(CollectionTime as DATETIME)
FROM field

How to use executables from a package installed locally in node_modules?

update: If you're on the recent npm (version >5.2)

You can use:

npx <command>

npx looks for command in .bin directory of your node_modules

old answer:

For Windows

Store the following in a file called npm-exec.bat and add it to your %PATH%

@echo off
set cmd="npm bin"
FOR /F "tokens=*" %%i IN (' %cmd% ') DO SET modules=%%i
"%modules%"\%*

Usage

Then you can use it like npm-exec <command> <arg0> <arg1> ...

For example

To execute wdio installed in local node_modules directory, do:

npm-exec wdio wdio.conf.js

i.e. it will run .\node_modules\.bin\wdio wdio.conf.js

How to modify values of JsonObject / JsonArray directly?

Another approach would be to deserialize into a java.util.Map, and then just modify the Java Map as wanted. This separates the Java-side data handling from the data transport mechanism (JSON), which is how I prefer to organize my code: using JSON for data transport, not as a replacement data structure.

How to pass a datetime parameter?

Since I have encoding ISO-8859-1 operating system the date format "dd.MM.yyyy HH:mm:sss" was not recognised what did work was to use InvariantCulture string.

string url = "GetData?DagsPr=" + DagsProfs.ToString(CultureInfo.InvariantCulture)

How to make PDF file downloadable in HTML link?

This can be achieved using HTML.

<a href="myfile.pdf">Download Brochure</a>

Add download attribute to it: Here the file name will be myfile.pdf

<a href="myfile.pdf" download>Download Brochure</a>

Specify a value for the download attribute:

<a href="myfile.pdf" download="Brochure">Download Brochure</a>

Here the file name will be Brochure.pdf

How do I make a simple makefile for gcc on Linux?

all: program
program.o: program.h headers.h

is enough. the rest is implicit

How to download and save an image in Android

it might help you..

Button download_image = (Button)bigimagedialog.findViewById(R.id.btn_downloadimage);
                    download_image.setOnClickListener(new View.OnClickListener()
                    {
                        public void onClick(View v)
                        {
                            boolean success = (new File("/sdcard/dirname")).mkdir(); 
                            if (!success)
                            {
                                Log.w("directory not created", "directory not created");
                            }

                            try
                            {
                                URL url = new URL("YOUR_URL");
                                HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                                connection.setDoInput(true);
                                connection.connect();
                                InputStream input = connection.getInputStream();
                                Bitmap myBitmap = BitmapFactory.decodeStream(input);

                                String data1 = String.valueOf(String.format("/sdcard/dirname/%d.jpg",System.currentTimeMillis()));

                                FileOutputStream stream = new FileOutputStream(data1);

                                ByteArrayOutputStream outstream = new ByteArrayOutputStream();
                                myBitmap.compress(Bitmap.CompressFormat.JPEG, 85, outstream);
                                byte[] byteArray = outstream.toByteArray();

                                stream.write(byteArray);
                                stream.close();

                                Toast.makeText(getApplicationContext(), "Downloading Completed", Toast.LENGTH_SHORT).show();
                            }
                            catch (Exception e)
                            {
                                e.printStackTrace();
                            }
                        }
                    });

Detect viewport orientation, if orientation is Portrait display alert message advising user of instructions

<html xmlns="http://www.w3.org/1999/xhtml">
 <head>
  <title>Rotation Test</title>
  <link type="text/css" href="css/style.css" rel="stylesheet"></style>
  <script src="js/jquery-1.5.min.js" type="text/javascript"></script>
  <script type="text/javascript">
        window.addEventListener("resize", function() {
            // Get screen size (inner/outerWidth, inner/outerHeight)
            var height = $(window).height();
            var width = $(window).width();

            if(width>height) {
              // Landscape
              $("#mode").text("LANDSCAPE");
            } else {
              // Portrait
              $("#mode").text("PORTRAIT");
            }
        }, false);

  </script>
 </head>
 <body onorientationchange="updateOrientation();">
   <div id="mode">LANDSCAPE</div>
 </body>
</html>

Angular - ng: command not found

just install npm install -g @angular/cli@latest

Python check if list items are integers?

Try this:

mynewlist = [s for s in mylist if s.isdigit()]

From the docs:

str.isdigit()

Return true if all characters in the string are digits and there is at least one character, false otherwise.

For 8-bit strings, this method is locale-dependent.

As noted in the comments, isdigit() returning True does not necessarily indicate that the string can be parsed as an int via the int() function, and it returning False does not necessarily indicate that it cannot be. Nevertheless, the approach above should work in your case.

Background color not showing in print preview

Are your sure this is a css issue ? There are some posts on google around this issue: http://productforums.google.com/forum/#!category-topic/chrome/discuss-chrome/eMlLBcKqd2s

It may be related to the print process. On safari, which is webkit also, there is a checkbox to print background images and colors in the printer dialog.

ERROR: Sonar server 'http://localhost:9000' can not be reached

In the config file there is a colon instead of an equal sign after the sonar.web.host.

Is:

sonar.web.host:sonarqube

Should be

sonar.web.host=sonarqube

Add timestamp column with default NOW() for new rows only

Try something like:-

ALTER TABLE table_name ADD  CONSTRAINT [DF_table_name_Created] 
DEFAULT (getdate()) FOR [created_at];

replacing table_name with the name of your table.

OkHttp Post Body as JSON

You can create your own JSONObject then toString().

Remember run it in the background thread like doInBackground in AsyncTask.

OkHttp version > 4:

// create your json here
JSONObject jsonObject = new JSONObject();
try {
    jsonObject.put("KEY1", "VALUE1");
    jsonObject.put("KEY2", "VALUE2");
} catch (JSONException e) {
    e.printStackTrace();
}

val client = OkHttpClient()
val mediaType = "application/json; charset=utf-8".toMediaType()
val body = jsonObject.toString().toRequestBody(mediaType)
val request: Request = Request.Builder()
            .url("https://YOUR_URL/")
            .post(body)
            .build()

var response: Response? = null
try {
    response = client.newCall(request).execute()
    val resStr = response.body!!.string()
} catch (e: IOException) {
    e.printStackTrace()
}

OkHttp version 3:

// create your json here
JSONObject jsonObject = new JSONObject();
try {
    jsonObject.put("KEY1", "VALUE1");
    jsonObject.put("KEY2", "VALUE2");
} catch (JSONException e) {
    e.printStackTrace();
}

  OkHttpClient client = new OkHttpClient();
  MediaType JSON = MediaType.parse("application/json; charset=utf-8");
  // put your json here
  RequestBody body = RequestBody.create(JSON, jsonObject.toString());
  Request request = new Request.Builder()
                    .url("https://YOUR_URL/")
                    .post(body)
                    .build();

  Response response = null;
  try {
      response = client.newCall(request).execute();
      String resStr = response.body().string();
  } catch (IOException e) {
      e.printStackTrace();
  }

SQL Server - INNER JOIN WITH DISTINCT

It's not the same doing a select distinct at the beginning because you are wasting all the calculated rows from the result.

select a.FirstName, a.LastName, v.District
from AddTbl a order by Firstname
natural join (select distinct LastName from
            ValTbl v  where a.LastName = v.LastName)

try that.

Visual Studio Community 2015 expiration date

Visual Studio Community 2015 is free. But I got the 30 day trial expired message. After some googling figured out that I have to sign in with a Microsoft account. So I signed up with my Hotmail account and after that I was able to continue using the VS community 2015.

Open Form2 from Form1, close Form1 from Form2

Form1:

    private void button1_Click(object sender, EventArgs e)
    {
        Form2 frm = new Form2(this);
        frm.Show();
    }

Form2:

public partial class Form2 : Form
{
    Form opener;

    public Form2(Form parentForm)
    {
        InitializeComponent();
        opener = parentForm;
    }

    private void button1_Click(object sender, EventArgs e)
    {
        opener.Close();
        this.Close();
    }
}

Professional jQuery based Combobox control?

If you don't need multi-column, chosen is another good choice. MIT Licensed

File Upload without Form

Basing on this tutorial, here a very basic way to do that:

$('your_trigger_element_selector').on('click', function(){    
    var data = new FormData();
    data.append('input_file_name', $('your_file_input_selector').prop('files')[0]);
    // append other variables to data if you want: data.append('field_name_x', field_value_x);

    $.ajax({
        type: 'POST',               
        processData: false, // important
        contentType: false, // important
        data: data,
        url: your_ajax_path,
        dataType : 'json',  
        // in PHP you can call and process file in the same way as if it was submitted from a form:
        // $_FILES['input_file_name']
        success: function(jsonData){
            ...
        }
        ...
    }); 
});

Don't forget to add proper error handling

Using iText to convert HTML to PDF

I have ended up using ABCPdf from webSupergoo. It works really well and for about $350 it has saved me hours and hours based on your comments above. Thanks again Daniel and Bratch for your comments.

How to refresh datagrid in WPF

Try mydatagrid.Items.Refresh()

Reading string from input with space character?

scanf("%s",name);

use & with scanf input

Defining a HTML template to append using JQuery

Very good answer from DevWL about using the native HTML5 template element. To contribute to this good question from the OP I would like to add on how to use this template element using jQuery, for example:

$($('template').html()).insertAfter( $('#somewhere_else') );

The content of the template is not html, but just treated as data, so you need to wrap the content into a jQuery object to then access jQuery's methods.

Android change SDK version in Eclipse? Unable to resolve target android-x

Goto project -->properties --> (in the dialog box that opens goto Java build path), and in order and export select android 4.1 (your new version) and select dependencies.

What are the sizes used for the iOS application splash screen?

With iOS 7+, static Launch Images are now deprecated.

You should create a custom view that composes slices of images, which sizes to all screens like a normal UIViewController view.

https://developer.apple.com/library/ios/documentation/UserExperience/Conceptual/MobileHIG/LaunchImages.html

The provided URI scheme 'https' is invalid; expected 'http'. Parameter name: via

Its a good to remember that config files can be split across secondary files to make config changes easier on different servers (dev/demo/production etc), without having to recompile code/app etc. For example we use them to allow onsite engineers to make endpoint changes without actually touching the 'real' files.

First step is to move the bindings section out of the WPF App.Config into it's own separate file.

The behaviours section is set to allow both http and https (doesn't seem to have an affect on the app if both are allowed)

<serviceMetadata httpsGetEnabled="true" httpGetEnabled="true" />

And we move the bindings section out to its own file;

 <bindings configSource="Bindings.config" />

In the bindings.config file we switch the security based on protocol

  <!-- None = http:// -->
  <!-- Transport = https:// -->
  <security mode="None" >

Now the on site engineers only need to change the Bindings.Config file and the Client.Config where we store the actual URL for each endpoint.

This way we can change the endpoint from http to https and back again to test the app without having to change any code.

Hope this helps.

Create an Oracle function that returns a table

  CREATE OR REPLACE PACKAGE BODY TEST AS 

   FUNCTION GET_UPS(
   TIMESPAN_IN IN VARCHAR2 DEFAULT 'MONTLHY',
   STARTING_DATE_IN DATE,
   ENDING_DATE_IN DATE
   )RETURN MEASURE_TABLE IS

    T MEASURE_TABLE;

 BEGIN

    **SELECT   MEASURE_RECORD(L4_ID , L6_ID ,L8_ID ,YEAR ,
             PERIOD,VALUE )  BULK COLLECT  INTO    T
    FROM    ...**

  ;

   RETURN T;

   END GET_UPS;

END TEST;

Routing with Multiple Parameters using ASP.NET MVC

Starting with MVC 5, you can also use Attribute Routing to move the URL parameter configuration to your controllers.

A detailed discussion is available here: http://blogs.msdn.com/b/webdev/archive/2013/10/17/attribute-routing-in-asp-net-mvc-5.aspx

Summary:

First you enable attribute routing

 public class RouteConfig 
 {
     public static void RegisterRoutes(RouteCollection routes)
     {
         routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

         routes.MapMvcAttributeRoutes();
     } 
 }

Then you can use attributes to define parameters and optionally data types

public class BooksController : Controller
{
    // eg: /books
    // eg: /books/1430210079
    [Route("books/{isbn?}")]
    public ActionResult View(string isbn)

Run php function on button click

<a href="home.php?click=1" class="btn">Click me</a>
<?php 
  if($_GET['click']){
    doSomething();
  }
?>

But is better to use JS and with ajax to call function!

Can't concatenate 2 arrays in PHP

Both will have a key of 0, and that method of combining the arrays will collapse duplicates. Try using array_merge() instead.

$arr1 = array('foo'); // Same as array(0 => 'foo')
$arr2 = array('bar'); // Same as array(0 => 'bar')

// Will contain array('foo', 'bar');
$combined = array_merge($arr1, $arr2);

If the elements in your array used different keys, the + operator would be more appropriate.

$arr1 = array('one' => 'foo');
$arr2 = array('two' => 'bar');

// Will contain array('one' => 'foo', 'two' => 'bar');
$combined = $arr1 + $arr2;

Edit: Added a code snippet to clarify

Remove Project from Android Studio

Easiest way to do this is close the project. Using file explorer head to the location of that project and delete.

Alot of processes, even simply deleting can be annoying to figure out in studio. Most deleting options a good work around is to delete using file explorer. This is a part of the process tht works for deleting modules as well. Which u will prob find is painful as well

Set a thin border using .css() in javascript

I'd recommend using a class instead of setting css properties. So instead of this:

$(this).css({"border-color": "#C1E0FF", 
             "border-width":"1px", 
             "border-style":"solid"});

Define a css class:

.border 
{ 
  border-color: #C1E0FF; 
  border-width:1px; 
  border-style:solid; 
}

And then change your javascript to:

$(this).addClass("border");

Check if a process is running or not on Windows with Python

This works nicely

def running():
    n=0# number of instances of the program running 
    prog=[line.split() for line in subprocess.check_output("tasklist").splitlines()]
    [prog.pop(e) for e in [0,1,2]] #useless 
    for task in prog:
        if task[0]=="itunes.exe":
            n=n+1
    if n>0:
        return True
    else:
        return False

Programs & Examples On #Ocmock

Background color of text in SVG

Download history stock prices automatically from yahoo finance in python

How to convert String to DOM Document object in java?

how to load url into div tag

Using port number in Windows host file

Difference in days between two dates in Java?

What is the meaning of CTOR?

Vertically centering Bootstrap modal window

How to make a boolean variable switch between true and false every time a method is invoked?

How to install a python library manually

How do I get the full path to a Perl script that is executing?

Oracle: How to filter by date and time in a where clause

I want to truncate a text or line with ellipsis using JavaScript

How to give a user only select permission on a database

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