dex file is a file that is executed on the Dalvik VM.

Dalvik VM includes several features for performance optimization, verification, and monitoring, one of which is Dalvik Executable (DEX).

Java source code is compiled by the Java compiler into .class files. Then the dx (dexer) tool, part of the Android SDK processes the .class files into a file format called DEX that contains Dalvik byte code. The dx tool eliminates all the redundant information that is present in the classes. In DEX all the classes of the application are packed into one file. The following table provides comparison between code sizes for JVM jar files and the files processed by the dex tool.

The table compares code sizes for system libraries, web browser applications, and a general purpose application (alarm clock app). In all cases dex tool reduced size of the code by more than 50%.

In standard Java environments each class in Java code results in one .class file. That means, if the Java source code file has one public class and two anonymous classes, let’s say for event handling, then the java compiler will create total three .class files.

The compilation step is same on the Android platform, thus resulting in multiple .class files. But after .class files are generated, the “dx” tool is used to convert all .class files into a single .dex, or Dalvik Executable, file. It is the .dex file that is executed on the Dalvik VM. The .dex file has been optimized for memory usage and the design is primarily driven by sharing of data.

In my project I have more then two modules and sdks, I try all suggestion or answer listed above like

• add multiDexEnabled true in defaultConfig
• Clean and Rebuild project
• replacing compile with implementing
• update all dependencies

All these work temporarily but when I open project structure(cntrl + altr + shift+ s) i found, In my Project Property nothing will selected like- - compile SDK version, build sdk version - In flavors same

I update all these and perform clean and rebuild project and it works for me.

After the installation of the new SDK, there is a new folder, "Android Dependencies", under your project file. If you right click and remove it from the build path, you will again be able to build your project.

Solution for me:

1. BACK UP YOUR CODE!

2. Navigate to your project workspace (not your project) and run the following commands:

   dev1:workspace$ cd ~/Documents/workspace/.metadata/.plugins/ dev1:workspace$ rm -rf org.eclipse.core.resources

3. Navigate to your Eclipse directory and type this command:

   dev1:eclipse$ ./eclipse clear

4. Eclipse will start with an empty workspace - don't worry your projects are still there. Simple create new project from existing resource and things should be gravy.

The exact error I was receiving: [2012-02-07 14:15:53 - Dex Loader] Unable to execute dex: Multiple dex files define Landroid/support/v4/view/PagerAdapter; [2012-02-07 14:15:53 - ProjectCloud] Conversion to Dalvik format failed: Unable to execute dex: Multiple dex files define Landroid/support/v4/view/PagerAdapter;

Since no one mentioned this, there's one more tool: DED homepage

Install how-to and some explanations: Installation.

It was used in a quite interesting study of the security of top market apps(not really related, just if you're curious): A Survey of Android Application Security

Are the users able to convert the apk file of my application back to the actual code?

yes.

People can use various tools to:

• analysis: your apk
• decode/hack your apk
  • using FDex2 to dump out dex file
    • then using dex2jar to convert to jar
      • then using jadx to conver to java source code

If they do - is there any way to prevent this?

yes. Several (can combined) ways to prevent (certain degree) this:

• low level: code obfuscation
  • using Android ProGuard
• high level: use android harden scenario
  • such as
  • Tecent Legu=????
  • qihoo 360=360???

More details can refer my Chinese tutorial: ??????????

step 1:

Download dex2jar here. Create a java project and paste (dex2jar-0.0.7.11-SNAPSHOT/lib ) jar files .

Copy apk file into java project

Run it and after refresh the project ,you get jar file .Using java decompiler you can view all java class files

step 2: Download java decompiler here

Remove some jar file from Libs folder and copy to some other folder, And Go to _Project Properties > Select Java Build Path, Select Libraries, Select Add External Jar, Select the Removed jar to your project, Click save, this will be added under Referenced Library instead of Libs folder. Now clean and Run your project. You dont need to add Any code for MultDex. Its simply worked for me.

Class which can have both concrete and non-concrete methods i.e. with and without body.

1. Methods without implementation must contain 'abstract' keyword.
2. Abstract class can't be instantiated.

Using Maven

First of all you should install android libraries to your local maven repository using Maven Android SDK Deployer

Then you can add dependency to your pom like this:

    <dependency>
        <groupId>android.support</groupId>
        <artifactId>compatibility-v7-appcompat</artifactId>
        <version>${compatibility.version}</version>
        <type>apklib</type>
    </dependency>

    <dependency>
        <groupId>android.support</groupId>
        <artifactId>compatibility-v7-appcompat</artifactId>
        <version>${compatibility.version}</version>
        <type>jar</type>
    </dependency>

//set vars
$user = $_POST['user'];
$pass = md5($_POST['pass']);

if ($user&&$pass) 
{
//connect to db
$connect = mysql_connect("$server","$username","$password") or die("not connecting");
mysql_select_db("users") or die("no db :'(");
$query = mysql_query("SELECT * FROM $tablename WHERE username='$user'");

$numrows = mysql_num_rows($query);


if ($numrows!=0)
{
//while loop
  while ($row = mysql_fetch_assoc($query))
  {
    $dbusername = $row['username'];
    $dbpassword = $row['password'];
  }
  else
      die("incorrect username/password!");
}
else
  echo "user does not exist!";
} 
else
    die("please enter a username and password!");

"Could not instantiate mail function" is PHPMailer's way of reporting that the call to mail() (in the Mail extension) failed. (So you're using the 'mail' mailer.)

You could try removing the @s before the calls to mail() in PHPMailer::MailSend and seeing what, if any, errors are being silently discarded.

selectRowToInput();
function selectRowToInput(){
var table = document.getElementById("table");
var rows = table.getElementsByTagName("tr");
for (var i = 0; i < rows.length; i++)
{
    var currentRow = table.rows[i];
    currentRow.onclick = function() {

       rows=this.rowIndex;
        console.log(rows);  
    };
}

}

although it is invalid html but you can use selector context to limit your selector in your case it would be like :

$("input[name='name']" , "#form2").val("Hello World! ");

http://api.jquery.com/jquery/#selector-context

You can use:

f.Controls[name];

Where f is your form variable. That gives you the control with name name.

jQuery and console.log are unrelated entities, although useful when used together.

If you use a browser's built-in dev tools, console.log will log information about the object being passed to the log function.

If the console is not active, logging will not work, and may break your script. Be certain to check that the console exists before logging:

if (window.console) console.log('foo');

The shortcut form of this might be seen instead:

window.console&&console.log('foo');

There are other useful debugging functions as well, such as debug, dir and error. Firebug's wiki lists the available functions in the console api.

Sometimes sorting the whole data ahead is very time consuming. We can groupby first and doing topk for each group:

g = df.groupby(['id']).apply(lambda x: x.nlargest(topk,['value'])).reset_index(drop=True)

Bottom line is that you'll have to write a new css rule for that.

Depending on which bundle of Twitter Bootstrap you're using, you should have variables for the various colours.

Try something like:

.table tbody tr > td {
  &.success { background-color: $green; }
  &.info { background-color: $blue; }
  ...
}

Surely there's a way to use extend or the LESS equivalent to avoid repeating the same styling.

To extend trigoman's answer (full credits to him) to work with POST (could also make work with PUT etc):

app.use('/api', function(req, res) {
  var url = 'YOUR_API_BASE_URL'+ req.url;
  var r = null;
  if(req.method === 'POST') {
     r = request.post({uri: url, json: req.body});
  } else {
     r = request(url);
  }

  req.pipe(r).pipe(res);
});

As a not yet fully standardized solution (though in alignment with the color syntax in CSS3) you can use e.g fill="rgba(124,240,10,0.5)". Works fine in Firefox, Opera, Chrome.

Here's an example.

$ svn copy http://svn.example.com/repos/calc/trunk@192 \
   http://svn.example.com/repos/calc/branches/my-calc-branch \
   -m "Creating a private branch of /calc/trunk."

Where 192 is the revision you specify

You can find this information from the SVN Book, specifically here on the page about svn copy

http://www.vancelucas.com/blog/fixing-ie7-z-index-issues-with-jquery/

$(function() {
var zIndexNumber = 1000;
$('div').each(function() {
    $(this).css('zIndex', zIndexNumber);
    zIndexNumber -= 10;
});
});

update of @Vladimir Tolstikov's answer

Create a Child Component that use ngOnChanges.

ChildComponent.ts::

import { Component, OnChanges, Input } from '@angular/core';
import { ActivatedRoute } from '@angular/router';

@Component({
  selector: 'child',
  templateUrl: 'child.component.html',
})

export class ChildComponent implements OnChanges {
  @Input() child_id;

  constructor(private route: ActivatedRoute) { }

  ngOnChanges() {
    // create header using child_id
    console.log(this.child_id);
  }
}

now use it in MasterComponent's template and pass data to ChildComponent like:

<child [child_id]="child_id"></child>

Download mingw-get and simply issue:

mingw-get install gcc.

See the Getting Started page.

To Empty a Current memory location of an array use: 'myArray.length = 0' or 'myArray.pop() UN-till its length is 0'

• length : You can set the length property to truncate an array at any time. When you extend an array by changing its length property, the number of actual elements increases.
• pop() : The pop method removes the last element from an array and returns that returns the removed value.
• shift() : The shift method removes the element at the zeroeth index and shifts the values at consecutive indexes down, then returns the removed value.

Example:

var arr = ['77'];
arr.length = 20;
console.log("Increasing : ", arr); // (20) ["77", empty × 19]
arr.length = 12;
console.log("Truncating : ", arr); // (12) ["77", empty × 11]

var mainArr = new Array();
mainArr = ['1', '2', '3', '4'];

var refArr = mainArr;
console.log('Current', mainArr, 'Refered', refArr);

refArr.length = 3;
console.log('Length: ~ Current', mainArr, 'Refered', refArr);

mainArr.push('0');
console.log('Push to the End of Current Array Memory Location \n~ Current', mainArr, 'Refered', refArr);

mainArr.poptill_length(0);
console.log('Empty Array \n~ Current', mainArr, 'Refered', refArr);

Array.prototype.poptill_length = function (e) {
  while (this.length) {
    if( this.length == e ) break;

    console.log('removed last element:', this.pop());
  }
};

• new Array() | [] Create an Array with new memory location by using Array constructor or array literal.

  mainArr = []; // a new empty array is addressed to mainArr.
  
  var arr = new Array('10'); // Array constructor
  arr.unshift('1'); // add to the front
  arr.push('15'); // add to the end
  console.log("After Adding : ", arr); // ["1", "10", "15"]
  
  arr.pop(); // remove from the end
  arr.shift(); // remove from the front
  console.log("After Removing : ", arr); // ["10"]
  
  var arrLit = ['14', '17'];
  console.log("array literal « ", indexedItem( arrLit ) ); // {0,14}{1,17}
  
  function indexedItem( arr ) {
      var indexedStr = "";
      arr.forEach(function(item, index, array) {
          indexedStr += "{"+index+","+item+"}";
          console.log(item, index);
      });
      return indexedStr;
  }
  

• slice() : By using slice function we get an shallow copy of elements from the original array, with new memory address, So that any modification on cloneArr will not affect to an actual|original array.

  var shallowCopy = mainArr.slice(); // this is how to make a copy
  
  var cloneArr = mainArr.slice(0, 3); 
  console.log('Main', mainArr, '\tCloned', cloneArr);
  
  cloneArr.length = 0; // Clears current memory location of an array.
  console.log('Main', mainArr, '\tCloned', cloneArr);
  

You need to combine multiple classes (col-*-offset-* for left-margin and col-*-pull-* to pull it right)

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>_x000D_
<div class="container">_x000D_
  <div class="row">_x000D_
    <div class="col-xs-3 col-xs-offset-9">_x000D_
      I'm a right column_x000D_
    </div>_x000D_
    <div class="col-xs-3">_x000D_
      We're_x000D_
    </div>_x000D_
    <div class="col-xs-3">_x000D_
      four columns_x000D_
    </div>_x000D_
    <div class="col-xs-3">_x000D_
      using the_x000D_
    </div>_x000D_
    <div class="col-xs-3">_x000D_
      whole row_x000D_
    </div>_x000D_
    <div class="col-xs-3 col-xs-offset-9 col-xs-pull-9">_x000D_
      I'm a left column_x000D_
    </div>_x000D_
    <div class="col-xs-3">_x000D_
      We're_x000D_
    </div>_x000D_
    <div class="col-xs-3">_x000D_
      four columns_x000D_
    </div>_x000D_
    <div class="col-xs-3">_x000D_
      using the_x000D_
    </div>_x000D_
    <div class="col-xs-3">_x000D_
      whole row_x000D_
    </div>_x000D_
  </div>_x000D_
</div>

So you don't need to separate it manually into different rows.

If you have successfully deleted from workspace tab but still it is showing in drop down menu. Then also you can successfully remove that by following these steps:

1. Go to C:/Users/user_name/.p4qt

user_name will be your username of your computer

2. Inside 001Clients folder WorkspaceSettings.xml file will be there.

There will be two tag

1. varName = "RecentlyUsedWorkspaces" remove the deleted workspace tag

2. A propertyList tag will be there with varName=deleted_workspace_name delete that tag.

from drop down menu workspace name will be deleted

Update May 2020, installed Anaconda 3 Individual Edition from https://www.anaconda.com/products/individual, chose 32-bit installer for Python 3.7, and installed with Default options.

Here is the directory where Anaconda was installed (C:\ProgramData\Anaconda3). Note ProgramData is a hidden folder not visible via Windows File Explorer.

And launching Anaconda command prompt from Start Menu>>Anaconda3 gives below command shell

"where anaconda" command gives below output C:\ProgramData\Anaconda3\Scripts\anaconda.exe and versions for anaconda, conda, python

Updated original question which was asked 3 years ago, and is relevant today as well in May 2020 as I had similar question/doubt when installing Anaconda recently.

There are, as i recall, two distributions of the gnu toolchain for windows: mingw and cygwin.

I'd expect cygwin work - a lot of effort has been made to make that a "stadard" posix environment.

The mingw toolchain uses msvcrt.dll for its runtime and thus will probably expose msvcrt's "thread" api: _beginthread which is defined in <process.h>

Conversion Operators (also known as User Defined Conversions)

In C++ you can create conversion operators, operators that allow the compiler to convert between your types and other defined types. There are two types of conversion operators, implicit and explicit ones.

Implicit Conversion Operators (C++98/C++03 and C++11)

An implicit conversion operator allows the compiler to implicitly convert (like the conversion between int and long) the value of a user-defined type to some other type.

The following is a simple class with an implicit conversion operator:

class my_string {
public:
  operator const char*() const {return data_;} // This is the conversion operator
private:
  const char* data_;
};

Implicit conversion operators, like one-argument constructors, are user-defined conversions. Compilers will grant one user-defined conversion when trying to match a call to an overloaded function.

void f(const char*);

my_string str;
f(str); // same as f( str.operator const char*() )

At first this seems very helpful, but the problem with this is that the implicit conversion even kicks in when it isn’t expected to. In the following code, void f(const char*) will be called because my_string() is not an lvalue, so the first does not match:

void f(my_string&);
void f(const char*);

f(my_string());

Beginners easily get this wrong and even experienced C++ programmers are sometimes surprised because the compiler picks an overload they didn’t suspect. These problems can be mitigated by explicit conversion operators.

Explicit Conversion Operators (C++11)

Unlike implicit conversion operators, explicit conversion operators will never kick in when you don't expect them to. The following is a simple class with an explicit conversion operator:

class my_string {
public:
  explicit operator const char*() const {return data_;}
private:
  const char* data_;
};

Notice the explicit. Now when you try to execute the unexpected code from the implicit conversion operators, you get a compiler error:

prog.cpp: In function ‘int main()’:
prog.cpp:15:18: error: no matching function for call to ‘f(my_string)’
prog.cpp:15:18: note: candidates are:
prog.cpp:11:10: note: void f(my_string&)
prog.cpp:11:10: note:   no known conversion for argument 1 from ‘my_string’ to ‘my_string&’
prog.cpp:12:10: note: void f(const char*)
prog.cpp:12:10: note:   no known conversion for argument 1 from ‘my_string’ to ‘const char*’

To invoke the explicit cast operator, you have to use static_cast, a C-style cast, or a constructor style cast ( i.e. T(value) ).

However, there is one exception to this: The compiler is allowed to implicitly convert to bool. In addition, the compiler is not allowed to do another implicit conversion after it converts to bool (a compiler is allowed to do 2 implicit conversions at a time, but only 1 user-defined conversion at max).

Because the compiler will not cast "past" bool, explicit conversion operators now remove the need for the Safe Bool idiom. For example, smart pointers before C++11 used the Safe Bool idiom to prevent conversions to integral types. In C++11, the smart pointers use an explicit operator instead because the compiler is not allowed to implicitly convert to an integral type after it explicitly converted a type to bool.

Continue to Overloading new and delete.

Your table is already locked by some query. For example, you may have executed "select for update" and have not yet committed/rollbacked and fired another select query. Do a commit/rollback before executing your query.

I was struggling with the same error message in SQL SERVER, since I had multiple joins, changing the order of the joins solved it for me.

A side comment here for those using any of these answers. Juba's answer is great, as it's very selective if your variables are either numberic or character strings. If however, you have a combination (e.g. a1, b1, a2, b2) etc. It will not convert the characters properly.

As @Trenton Hoffman notes,

library(dplyr)
df <- mutate_each(df, funs(toupper))

affects both character and factor classes and works for "mixed variables"; e.g. if your variable contains both a character and a numberic value (e.g. a1) both will be converted to a factor. Overall this isn't too much of a concern, but if you end up wanting match data.frames for example

df3 <- df1[df1$v1 %in% df2$v1,]

where df1 has been has been converted and df2 contains a non-converted data.frame or similar, this may cause some problems. The work around is that you briefly have to run

df2 <- df2 %>% mutate_each(funs(toupper), v1)
#or
df2 <- df2 %>% mutate_each(df2, funs(toupper))
#and then
df3 <- df1[df1$v1 %in% df2$v1,]

If you work with genomic data, this is when knowing this can come in handy.

The beauty of *nix tools is you can combine them:

ls -l | sort -k9,9

The output of ls -l will look like this

-rw-rw-r-- 1 luckydonald luckydonald  532 Feb 21  2017 Makefile
-rwxrwxrwx 1 luckydonald luckydonald 4096 Nov 17 23:47 file.txt

So with 9,9 you sort column 9 up to the column 9, being the file names. You have to provide where to stop, which is the same column in this case. The columns start with 1.

Also, if you want to ignore upper/lower case, add --ignore-case to the sort command.

if you are using extracted tomcat then,

startup.sh and shutdown.sh are two script located in TOMCAT/bin/ to start and shutdown tomcat, You could use that

if tomcat is installed then

/etc/init.d/tomcat5.5 start
/etc/init.d/tomcat5.5 stop
/etc/init.d/tomcat5.5 restart

I was unable to find the root cause of the issue but got a workaround. I started by setting my the java home variable as such.

• vi ~/.bash_profile (this is for macs only. bash profiles are different on linux)
• type the letter i for insert and then set the JAVA_HOME variable as such
• export JAVA_HOME=/Applications/Android\Studio.app/Contents/jre/jdk/Contents/Home/
• quit the vi editor with esc then type :wq
• Restart the computer
• Voila! Your android studio projects should build without any qualms

<!-- 
//THIS PROGRAM WILL UPLOAD IMAGE AND WILL RETRIVE FROM DATABASE. UNSING BLOB
(IF YOU HAVE ANY QUERY CONTACT:[email protected])


CREATE TABLE  `images` (
  `id` int(100) NOT NULL AUTO_INCREMENT,
  `name` varchar(100) NOT NULL,
  `image` longblob NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB ;

-->
<!-- this form is user to store images-->
<form action="index.php" method="post"  enctype="multipart/form-data">
Enter the Image Name:<input type="text" name="image_name" id="" /><br />

<input name="image" id="image" accept="image/JPEG" type="file"><br /><br />
<input type="submit" value="submit" name="submit" />
</form>
<br /><br />
<!-- this form is user to display all the images-->
<form action="index.php" method="post"  enctype="multipart/form-data">
Retrive all the images:
<input type="submit" value="submit" name="retrive" />
</form>



<?php
//THIS IS INDEX.PHP PAGE
//connect to database.db name is images
        mysql_connect("", "", "") OR DIE (mysql_error());
        mysql_select_db ("") OR DIE ("Unable to select db".mysql_error());
//to retrive send the page to another page
if(isset($_POST['retrive']))
{
    header("location:search.php");

}

//to upload
if(isset($_POST['submit']))
{
if(isset($_FILES['image'])) {
        $name=$_POST['image_name'];
        $email=$_POST['mail'];
        $fp=addslashes(file_get_contents($_FILES['image']['tmp_name'])); //will store the image to fp
        }
                // our sql query
                $sql = "INSERT INTO images VALUES('null', '{$name}','{$fp}');";
                            mysql_query($sql) or die("Error in Query insert: " . mysql_error());
} 
?>



<?php
//SEARCH.PHP PAGE
    //connect to database.db name = images
         mysql_connect("localhost", "root", "") OR DIE (mysql_error());
        mysql_select_db ("image") OR DIE ("Unable to select db".mysql_error());
//display all the image present in the database

        $msg="";
        $sql="select * from images";
        if(mysql_query($sql))
        {
            $res=mysql_query($sql);
            while($row=mysql_fetch_array($res))
            {
                    $id=$row['id'];
                    $name=$row['name'];
                    $image=$row['image'];

                  $msg.= '<a href="search.php?id='.$id.'"><img src="data:image/jpeg;base64,'.base64_encode($row['image']). ' " />   </a>';

            }
        }
        else
            $msg.="Query failed";
?>
<div>
<?php
echo $msg;
?>

You have installed the library in a non-standard location ($HOME/zlib/). That means the compiler will not know where your header files are and you need to tell the compiler that.

You can add a path to the list that the compiler uses to search for header files by using the -I (upper-case i) option.

Also note that the LD_LIBRARY_PATH is for the run-time linker and loader, and is searched for dynamic libraries when attempting to run an application. To add a path for the build-time linker use the -L option.

All-together the command line should look like

$ c++ -I$HOME/zlib/include some_file.cpp -L$HOME/zlib/lib -lz

The call

e.extractAll("th")

for a regular method extractAll() is indeed equivalent to

Extractor.extractAll(e, "th")

These two calls are treated the same in all regards, including the error messages you get.

If you don't need to pass the instance to a method, you can use a staticmethod:

@staticmethod
def extractAll(tag):
    ...

which can be called as e.extractAll("th"). But I wonder why this is a method on a class at all if you don't need to access any instance.

It's 2017, and now you can use object-fit which has decent support. It works in the same way as a div's background-size but on the element itself, and on any element including images.

.your-img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

Here is how I got it going specifically for the admob sdk jar file:

1. Drag your jar file into the libs folder.
2. Right click on the jar file and select Add Library now the jar file is a library lets add it to the compile path
3. Open the build.gradle file (note there are two build.gradle files at least, don't use the root one use the one in your project scope).

4. Find the dependencies section (for me i was trying to the admob -GoogleAdMobAdsSdk jar file) e.g.

   dependencies {
      compile files('libs/android-support-v4.jar','libs/GoogleAdMobAdsSdk-6.3.1.jar')
   }
   

5. Last go into settings.gradle and ensure it looks something like this:

   include ':yourproject', ':yourproject:libs:GoogleAdMobAdsSdk-6.3.1'
   

6. Finally, Go to Build -> Rebuild Project

If you're curious which protocols .NET supports, you can try HttpClient out on https://www.howsmyssl.com/

// set proxy if you need to
// WebRequest.DefaultWebProxy = new WebProxy("http://localhost:3128");

File.WriteAllText("howsmyssl-httpclient.html", new HttpClient().GetStringAsync("https://www.howsmyssl.com").Result);

// alternative using WebClient for older framework versions
// new WebClient().DownloadFile("https://www.howsmyssl.com/", "howsmyssl-webclient.html");

The result is damning:

Your client is using TLS 1.0, which is very old, possibly susceptible to the BEAST attack, and doesn't have the best cipher suites available on it. Additions like AES-GCM, and SHA256 to replace MD5-SHA-1 are unavailable to a TLS 1.0 client as well as many more modern cipher suites.

As Eddie explains above, you can enable better protocols manually:

System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11; 

I don't know why it uses bad protocols out-the-box. That seems a poor setup choice, tantamount to a major security bug (I bet plenty of applications don't change the default). How can we report it?

Hm...

The thing is wrong, and possibly in the proper operation of the animations in the Android API.

The fact is that when you set in your code alpha value of 0.2f is based on the settings in the xml file for android it means that :

0.2f = 0.2f of 0.2f (20% from 100%) ie from 0.2f / 5 = 0.04f
1f = 0.2f

So your animation in fact works from 0.04f to 0.2f

flag setFillAfter(true) certainly works, but you need to understand that at the end of your animation ImageView will have the alpha value 0.2f instead of one, because you specify 0.2f as marginally acceptable value in the animation (a kind of maximum alpha channel).

So if you want to have the desired result shall carry all your logic to your code and manipulate animations in code instead of determining in xml.

You should understand that your animations directly depends of two things:

• LayoutParams of Animated View
• Animation parameters.

Animation parameters manipulate your LayoutParams in setFillAfter\setFillBefore methods.

As part of trying to answer one of my own questions here, I came across this trick.

In the API Gateway mapping template, use the following to give you the complete query string as sent by the HTTP client:

{
    "querystring": "$input.params().querystring"
}

The advantage is that you don't have to limit yourself to a set of predefined mapped keys in your query string. Now you can accept any key-value pairs in the query string, if this is how you want to handle.

Note: According to this, only $input.params(x) is listed as a variable made available for the VTL template. It is possible that the internals might change and querystring may no longer be available.

You guys don't need those complex things to set locales on Ubuntu/Debian. You don't even need /etc/local.gen file.

Simply locale-gen will do everything and the author only missed locales package.

RUN apt-get update && apt-get install -y locales && rm -rf /var/lib/apt/lists/* \
 && locale-gen "en_US.UTF-8"
ENV LANG=en_US.UTF-8 \
    LANGUAGE=en_US:en \
    LC_ALL=en_US.UTF-8

I found this the simplest and the most effective. I confirm it works on Ubuntu 16.04.

This will output the Exception, use only to debug you should handle you exceptions better.

import java.io.PrintWriter;
import java.io.StringWriter;
    public static String getStackTrace(Throwable t)
    {
        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw, true);
        t.printStackTrace(pw);
        pw.flush();
        sw.flush();
        return sw.toString();
    }

In Objective-C

CGFloat spacing = 5;
UICollectionViewFlowLayout *flow = (UICollectionViewFlowLayout*)_habbitCollectionV.collectionViewLayout;
flow.sectionInset = UIEdgeInsetsMake(0, spacing, 0, spacing);
CGFloat itemsPerRow = 2;
CGRect screenRect = [[UIScreen mainScreen] bounds];
CGFloat oneMore = itemsPerRow + 1;
CGFloat width = screenRect.size.width - spacing * oneMore;
CGFloat height = width / itemsPerRow;

flow.itemSize = CGSizeMake(floor(height), height);
flow.minimumInteritemSpacing = spacing;
flow.minimumLineSpacing = spacing;

All you have to do is change the itemsPerRow value and it will update the number of items per row accordingly. Furthermore, you can change the spacing value if you want more or less general spacing.

If anyone is trying to build a hello world application using Jersey, I think one of the easiest ways is to follow Jersey documentation.

https://jersey.github.io/download.html

If you are already using maven, it'd take only a few minutes to see the result.

I used below.

mvn archetype:generate -DarchetypeGroupId=org.glassfish.jersey.archetypes -DarchetypeArtifactId=jersey-quickstart-webapp -DarchetypeVersion=2.26

This can happen when you added Core Data to an existing project.
Check the:
<Name>/<Name>.xcdatamodeld/<Name>.xcdatamodel/contents
file.
This file contains an entry "sourceLanguage" that (by default) might have been set to "Swift". Change it to "Objective-C".

Setting CSS width to 1% or 100% of an element according to all specs I could find out is related to the parent. Although Blink Rendering Engine (Chrome) and Gecko (Firefox) at the moment of writing seems to handle that 1% or 100% (make a columns shrink or a column to fill available space) well, it is not guaranteed according to all CSS specifications I could find to render it properly.

One option is to replace table with CSS4 flex divs:

https://css-tricks.com/snippets/css/a-guide-to-flexbox/

That works in new browsers i.e. IE11+ see table at the bottom of the article.

Strictly speaking, foreign keys have absolutely nothing to do with indexes, yes. But, as the speakers above me pointed out, it makes sense to create one to speed up the FK-lookups. In fact, in MySQL, if you don't specify an index in your FK declaration, the engine (InnoDB) creates it for you automatically.

Use waitpid() like this:

pid_t childPid;  // the child process that the execution will soon run inside of. 
childPid = fork();

if(childPid == 0)  // fork succeeded 
{   
   // Do something   
   exit(0); 
}

else if(childPid < 0)  // fork failed 
{    
   // log the error
}

else  // Main (parent) process after fork succeeds 
{    
    int returnStatus;    
    waitpid(childPid, &returnStatus, 0);  // Parent process waits here for child to terminate.

    if (returnStatus == 0)  // Verify child process terminated without error.  
    {
       printf("The child process terminated normally.");    
    }

    if (returnStatus == 1)      
    {
       printf("The child process terminated with an error!.");    
    }
}

I noticed a couple of syntax errors, but other than that, it should work fine:

var arr = [
  ["Blankaholm", "Gamleby"],
  ["2012-10-23", "2012-10-22"],
  ["Blankaholm. Under natten har det varit inbrott", "E22 i med Gamleby. Singelolycka. En bilist har."], //<- syntax error here
  ["57.586174","16.521841"], ["57.893162","16.406090"]
];


console.log(arr[4]);    //["57.893162","16.406090"]
console.log(arr[4][0]); //57.893162

High performance - every Double object wraps a single double value. If you want to store all these values into a double[] array, then you have to iterate over the collection of Double instances. A O(1) mapping is not possible, this should be the fastest you can get:

 double[] target = new double[doubles.size()];
 for (int i = 0; i < target.length; i++) {
    target[i] = doubles.get(i).doubleValue();  // java 1.4 style
    // or:
    target[i] = doubles.get(i);                // java 1.5+ style (outboxing)
 }

Thanks for the additional question in the comments ;) Here's the sourcecode of the fitting ArrayUtils#toPrimitive method:

public static double[] toPrimitive(Double[] array) {
  if (array == null) {
    return null;
  } else if (array.length == 0) {
    return EMPTY_DOUBLE_ARRAY;
  }
  final double[] result = new double[array.length];
  for (int i = 0; i < array.length; i++) {
    result[i] = array[i].doubleValue();
  }
  return result;
}

(And trust me, I didn't use it for my first answer - even though it looks ... pretty similiar :-D )

By the way, the complexity of Marcelos answer is O(2n), because it iterates twice (behind the scenes): first to make a Double[] from the list, then to unwrap the double values.

from manual:

: [arguments] No effect; the command does nothing beyond expanding arguments and performing any specified redirections. A zero exit code is returned.

As this returns always zero therefore is is similar to be used as true

Check out this answer: What Is the Purpose of the `:' (colon) GNU Bash Builtin?

May not be the exactly same problem. but there is a nice article on the same line Here

I have different approach if you want access token and make call to other resource system with access token in header

Spring Security comes with automatic security: oauth2 properties access from application.yml file for every request and every request has SESSIONID which it reads and pull user info via Principal, so you need to make sure inject Principal in OAuthUser and get accessToken and make call to resource server

This is your application.yml, change according to your auth server:

security:
  oauth2:
    client:
      clientId: 233668646673605
      clientSecret: 33b17e044ee6a4fa383f46ec6e28ea1d
      accessTokenUri: https://graph.facebook.com/oauth/access_token
      userAuthorizationUri: https://www.facebook.com/dialog/oauth
      tokenName: oauth_token
      authenticationScheme: query
      clientAuthenticationScheme: form
    resource:
      userInfoUri: https://graph.facebook.com/me

@Component
public class OAuthUser implements Serializable {

private static final long serialVersionUID = 1L;

private String authority;

@JsonIgnore
private String clientId;

@JsonIgnore
private String grantType;
private boolean isAuthenticated;
private Map<String, Object> userDetail = new LinkedHashMap<String, Object>();

@JsonIgnore
private String sessionId;

@JsonIgnore
private String tokenType;

@JsonIgnore
private String accessToken;

@JsonIgnore
private Principal principal;

public void setOAuthUser(Principal principal) {
    this.principal = principal;
    init();
}

public Principal getPrincipal() {
    return principal;
}

private void init() {
    if (principal != null) {
        OAuth2Authentication oAuth2Authentication = (OAuth2Authentication) principal;
        if (oAuth2Authentication != null) {
            for (GrantedAuthority ga : oAuth2Authentication.getAuthorities()) {
                setAuthority(ga.getAuthority());
            }
            setClientId(oAuth2Authentication.getOAuth2Request().getClientId());
            setGrantType(oAuth2Authentication.getOAuth2Request().getGrantType());
            setAuthenticated(oAuth2Authentication.getUserAuthentication().isAuthenticated());

            OAuth2AuthenticationDetails oAuth2AuthenticationDetails = (OAuth2AuthenticationDetails) oAuth2Authentication
                    .getDetails();
            if (oAuth2AuthenticationDetails != null) {
                setSessionId(oAuth2AuthenticationDetails.getSessionId());
                setTokenType(oAuth2AuthenticationDetails.getTokenType());

            // This is what you will be looking for 
                setAccessToken(oAuth2AuthenticationDetails.getTokenValue());
            }

    // This detail is more related to Logged-in User
            UsernamePasswordAuthenticationToken userAuthenticationToken = (UsernamePasswordAuthenticationToken) oAuth2Authentication.getUserAuthentication();
            if (userAuthenticationToken != null) {
                LinkedHashMap<String, Object> detailMap = (LinkedHashMap<String, Object>) userAuthenticationToken.getDetails();
                if (detailMap != null) {
                    for (Map.Entry<String, Object> mapEntry : detailMap.entrySet()) {
                        //System.out.println("#### detail Key = " + mapEntry.getKey());
                        //System.out.println("#### detail Value = " + mapEntry.getValue());
                        getUserDetail().put(mapEntry.getKey(), mapEntry.getValue());
                    }

                }

            }

        }

    }
}


public String getAuthority() {
    return authority;
}

public void setAuthority(String authority) {
    this.authority = authority;
}

public String getClientId() {
    return clientId;
}

public void setClientId(String clientId) {
    this.clientId = clientId;
}

public String getGrantType() {
    return grantType;
}

public void setGrantType(String grantType) {
    this.grantType = grantType;
}

public boolean isAuthenticated() {
    return isAuthenticated;
}

public void setAuthenticated(boolean isAuthenticated) {
    this.isAuthenticated = isAuthenticated;
}

public Map<String, Object> getUserDetail() {
    return userDetail;
}

public void setUserDetail(Map<String, Object> userDetail) {
    this.userDetail = userDetail;
}

public String getSessionId() {
    return sessionId;
}

public void setSessionId(String sessionId) {
    this.sessionId = sessionId;
}

public String getTokenType() {
    return tokenType;
}

public void setTokenType(String tokenType) {
    this.tokenType = tokenType;
}

public String getAccessToken() {
    return accessToken;
}

public void setAccessToken(String accessToken) {
    this.accessToken = accessToken;
}

@Override
public String toString() {
    return "OAuthUser [clientId=" + clientId + ", grantType=" + grantType + ", isAuthenticated=" + isAuthenticated
            + ", userDetail=" + userDetail + ", sessionId=" + sessionId + ", tokenType="
            + tokenType + ", accessToken= " + accessToken + " ]";
}

@RestController
public class YourController {

@Autowired
OAuthUser oAuthUser;

// In case if you want to see Profile of user then you this 
@RequestMapping(value = "/profile", produces = MediaType.APPLICATION_JSON_VALUE)
public OAuthUser user(Principal principal) {
    oAuthUser.setOAuthUser(principal);

    // System.out.println("#### Inside user() - oAuthUser.toString() = " + oAuthUser.toString());

    return oAuthUser;
}


@RequestMapping(value = "/createOrder",
        method = RequestMethod.POST,
        headers = {"Content-type=application/json"},
        consumes = MediaType.APPLICATION_JSON_VALUE,
        produces = MediaType.APPLICATION_JSON_VALUE)
public FinalOrderDetail createOrder(@RequestBody CreateOrder createOrder) {

    return postCreateOrder_restTemplate(createOrder, oAuthUser).getBody();
}


private ResponseEntity<String> postCreateOrder_restTemplate(CreateOrder createOrder, OAuthUser oAuthUser) {

String url_POST = "your post url goes here";

    MultiValueMap<String, String> headers = new LinkedMultiValueMap<>();
    headers.add("Authorization", String.format("%s %s", oAuthUser.getTokenType(), oAuthUser.getAccessToken()));
    headers.add("Content-Type", "application/json");

    RestTemplate restTemplate = new RestTemplate();
    //restTemplate.getMessageConverters().add(new MappingJackson2HttpMessageConverter());

    HttpEntity<String> request = new HttpEntity<String>(createOrder, headers);

    ResponseEntity<String> result = restTemplate.exchange(url_POST, HttpMethod.POST, request, String.class);
    System.out.println("#### post response = " + result);

    return result;
}


}

I would use:

val, idx = min((val, idx) for (idx, val) in enumerate(my_list))

Then val will be the minimum value and idx will be its index.

Nothing worked for me except, I loggined using pgAdmin4 and on the Dashboard I disconnected all connections except pgAdmin4 and then was able to rename by right lick on the database and properties and typed new name.

I will repeat what the others said, but will just try to make it simpler...

First, just create the Interface class

public interface PostTaskListener<K> {
    // K is the type of the result object of the async task 
    void onPostTask(K result);
}

Second, create the AsyncTask (which can be an inner static class of your activity or fragment) that uses the Interface, by including a concrete class. In the example, the PostTaskListener is parameterized with String, which means it expects a String class as a result of the async task.

public static class LoadData extends AsyncTask<Void, Void, String> {

    private PostTaskListener<String> postTaskListener;

    protected LoadData(PostTaskListener<String> postTaskListener){
        this.postTaskListener = postTaskListener;
    }

    @Override
    protected void onPostExecute(String result) {
        super.onPostExecute(result);

        if (result != null && postTaskListener != null)
            postTaskListener.onPostTask(result);
    }
}

Finally, the part where your combine your logic. In your activity / fragment, create the PostTaskListener and pass it to the async task. Here is an example:

...
PostTaskListener<String> postTaskListener = new PostTaskListener<String>() {
    @Override
    public void onPostTask(String result) {
        //Your post execution task code
    }
}

// Create the async task and pass it the post task listener.
new LoadData(postTaskListener);

Done!

I use the program SQLYOG where I can make a select query, point at the results and choose export as sql. This gives me the insert statements.

Bootstrap.yml is used to fetch config from the server. It can be for a Spring cloud application or for others. Typically it looks like:

spring:
  application:
    name: "app-name"
  cloud:
    config:
      uri: ${config.server:http://some-server-where-config-resides}

When we start the application it tries to connect to the given server and read the configuration based on spring profile mentioned in run/debug configuration.

If the server is unreachable application might even be unable to proceed further. However, if configurations matching the profile are present locally the server configs get overridden.

Good approach:

Maintain a separate profile for local and run the app using different profiles.

I installed mavaen using sdkman because of which the other proposed solution didn't work, as they are applicable if the installation is done via Homebrew or as a standalone binary.

for my solution I did "which mvn" in the terminal which returned: "/Users/samkaz/.sdkman/candidates/maven/current/bin/mvn"

Then after opening the path in a finder and looking around the above directory I found settings.xml in the below folder. "/Users/samkaz/.sdkman/candidates/maven/3.6.3/conf"

You can follow this pattern also

<form action="/action_page.php">
  E-mail: <input type="email" name="email" pattern="[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,}$">
  <input type="submit">
</form>

Ref : In W3Schools

vim +21490go script.py

From the command line will open the file and take you to position 21490 in the buffer.

Triggering it from the command line like this allows you to automate a script to parse the exception message and open the file to the problem position.

Excerpt from man vim:

+{command}

-c {command}

{command} will be executed after the first file has been read. {command} is interpreted as an Ex command. If the {command} contains spaces it must be enclosed in double quotes (this depends on the shell that is used).

You can use gcc, in Terminal, by doing gcc -c tat.c -o tst

however, it doesn't come installed by default. You have to install the XCode package from tour install disc or download from http://developer.apple.com

Here is where to download past developer tools from, which includes XCode 3.1, 3.0, 2.5 ...

http://connect.apple.com/cgi-bin/WebObjects/MemberSite.woa/wo/5.1.17.2.1.3.3.1.0.1.1.0.3.3.3.3.1

That entire block is misplaced.

class Example(object):
    def main(self):     
        print "Hello World!"

if __name__ == '__main__':
    Example().main()

But you really shouldn't be using a class just to run your main code.

Try javax.net.ssl.keyStorePassword instead of javax.net.ssl.keyPassword: the latter isn't mentioned in the JSSE ref guide.

The algorithms you mention should be there by default using the default security providers. NoSuchAlgorithmExceptions are often cause by other underlying exceptions (file not found, wrong password, wrong keystore type, ...). It's useful to look at the full stack trace.

You could also use -Djavax.net.debug=ssl, or at least -Djavax.net.debug=ssl,keymanager, to get more debugging information, if the information in the stack trace isn't sufficient.

firstobject's 605k download lightweight native Windows free XML editor opens a 50MB file in 1.3 seconds and provides text editing, search, syntax-colored printing, plus tree view and additional XML features including formatting and full-blown CMarkup scripting built in. You can reformat an entire 50MB XML document to a different indentation (takes 3 seconds on a nothing special 2.3GHz/2GB machine).

$(this).parent().parent().attr('id');

Is how you would get the id of the parent's parent.

EDIT:

$(this).closest('ul').attr('id');

Is a more foolproof solution for your case.

This is an old post, but I thought I'd give an example using an ExtensionMethod (since C# 3.0), since this will hide the implementation and allow for use everywhere in the project instead or recreating the code over and over or needing to be aware of some utility class.

Extension methods enable you to "add" methods to existing types without creating a new derived type, recompiling, or otherwise modifying the original type. Extension methods are a special kind of static method, but they are called as if they were instance methods on the extended type. For client code written in C# and Visual Basic, there is no apparent difference between calling an extension method and the methods that are actually defined in a type.

public static class DateTimeExtensions
    {
        public static int ToYearLastTwoDigit(this DateTime date)
        {
            var temp = date.ToString("yy");
            return int.Parse(temp);
        }
    }

You can then call this method anywhere you use a DateTime object, for example...

var dateTime = new DateTime(2015, 06, 19);
var year = cob.ToYearLastTwoDigit();

I like to use the following method (it supports up to terabytes, which is enough for most cases, but it can easily be extended):

private string GetSizeString(long length)
{
    long B = 0, KB = 1024, MB = KB * 1024, GB = MB * 1024, TB = GB * 1024;
    double size = length;
    string suffix = nameof(B);

    if (length >= TB) {
        size = Math.Round((double)length / TB, 2);
        suffix = nameof(TB);
    }
    else if (length >= GB) {
        size = Math.Round((double)length / GB, 2);
        suffix = nameof(GB);
    }
    else if (length >= MB) {
        size = Math.Round((double)length / MB, 2);
        suffix = nameof(MB);
    }
    else if (length >= KB) {
        size = Math.Round((double)length / KB, 2);
        suffix = nameof(KB);
    }

    return $"{size} {suffix}";
}

Please keep in mind that this is written for C# 6.0 (2015), so it might need a little editing for earlier versions.

You can also call cancelAll on the notification manager, so you don't even have to worry about the notification ids.

NotificationManager notifManager= (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
notifManager.cancelAll();

EDIT : I was downvoted so maybe I should specify that this will only remove the notification from your application.

A regular pipe can only connect two related processes. It is created by a process and will vanish when the last process closes it.

A named pipe, also called a FIFO for its behavior, can be used to connect two unrelated processes and exists independently of the processes; meaning it can exist even if no one is using it. A FIFO is created using the mkfifo() library function.

Example

writer.c

#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>

int main()
{
    int fd;
    char * myfifo = "/tmp/myfifo";

    /* create the FIFO (named pipe) */
    mkfifo(myfifo, 0666);

    /* write "Hi" to the FIFO */
    fd = open(myfifo, O_WRONLY);
    write(fd, "Hi", sizeof("Hi"));
    close(fd);

    /* remove the FIFO */
    unlink(myfifo);

    return 0;
}

reader.c

#include <fcntl.h>
#include <stdio.h>
#include <sys/stat.h>
#include <unistd.h>

#define MAX_BUF 1024

int main()
{
    int fd;
    char * myfifo = "/tmp/myfifo";
    char buf[MAX_BUF];

    /* open, read, and display the message from the FIFO */
    fd = open(myfifo, O_RDONLY);
    read(fd, buf, MAX_BUF);
    printf("Received: %s\n", buf);
    close(fd);

    return 0;
}

_{Note: Error checking was omitted from the above code for simplicity.}

The query answered by sandip giri was the correct answer, here a similar example getting the maximum id (PresupuestoEtapaActividadHistoricoId), after calculate the maximum value(Base)

select * 
from (
    select PEAA.PresupuestoEtapaActividadId,
        PEAH.PresupuestoEtapaActividadHistoricoId,             
        sum(PEAA.ValorTotalDesperdicioBase) as Base,
        sum(PEAA.ValorTotalDesperdicioEjecucion) as Ejecucion
    from hgc.PresupuestoActividadAnalisis as PEAA
    inner join hgc.PresupuestoEtapaActividad as PEA
        on PEAA.PresupuestoEtapaActividadId = PEA.PresupuestoEtapaActividadId
    inner join hgc.PresupuestoEtapaActividadHistorico as PEAH
        on PEA.PresupuestoEtapaActividadId = PEAH.PresupuestoEtapaActividadId                                                         
    group by PEAH.PresupuestoEtapaActividadHistoricoId, PEAA.PresupuestoEtapaActividadId    
) as t
where exists (
    select 1 
    from (
        select MAX(PEAH.PresupuestoEtapaActividadHistoricoId) as PresupuestoEtapaActividadHistoricoId                                                                     
        from hgc.PresupuestoEtapaActividadHistorico as PEAH                       
        group by PEAH.PresupuestoEtapaActividadId  
    ) as ti
    where t.PresupuestoEtapaActividadHistoricoId = ti.PresupuestoEtapaActividadHistoricoId 
)

The problem you have is related to TCP streaming nature.

The fact that you sent 100 Bytes (for example) from the server doesn't mean you will read 100 Bytes in the client the first time you read. Maybe the bytes sent from the server arrive in several TCP segments to the client.

You need to implement a loop in which you read until the whole message was received. Let me provide an example with DataInputStream instead of BufferedinputStream. Something very simple to give you just an example.

Let's suppose you know beforehand the server is to send 100 Bytes of data.

In client you need to write:

byte[] messageByte = new byte[1000];
boolean end = false;
String dataString = "";

try 
{
    DataInputStream in = new DataInputStream(clientSocket.getInputStream());

    while(!end)
    {
        int bytesRead = in.read(messageByte);
        dataString += new String(messageByte, 0, bytesRead);
        if (dataString.length == 100)
        {
            end = true;
        }
    }
    System.out.println("MESSAGE: " + dataString);
}
catch (Exception e)
{
    e.printStackTrace();
}

Now, typically the data size sent by one node (the server here) is not known beforehand. Then you need to define your own small protocol for the communication between server and client (or any two nodes) communicating with TCP.

The most common and simple is to define TLV: Type, Length, Value. So you define that every message sent form server to client comes with:

• 1 Byte indicating type (For example, it could also be 2 or whatever).
• 1 Byte (or whatever) for length of message
• N Bytes for the value (N is indicated in length).

So you know you have to receive a minimum of 2 Bytes and with the second Byte you know how many following Bytes you need to read.

This is just a suggestion of a possible protocol. You could also get rid of "Type".

So it would be something like:

byte[] messageByte = new byte[1000];
boolean end = false;
String dataString = "";

try 
{
    DataInputStream in = new DataInputStream(clientSocket.getInputStream());
    int bytesRead = 0;

    messageByte[0] = in.readByte();
    messageByte[1] = in.readByte();

    int bytesToRead = messageByte[1];

    while(!end)
    {
        bytesRead = in.read(messageByte);
        dataString += new String(messageByte, 0, bytesRead);
        if (dataString.length == bytesToRead )
        {
            end = true;
        }
    }
    System.out.println("MESSAGE: " + dataString);
}
catch (Exception e)
{
    e.printStackTrace();
}

The following code compiles and looks better. It assumes the first two bytes providing the length arrive in binary format, in network endianship (big endian). No focus on different encoding types for the rest of the message.

import java.nio.ByteBuffer;
import java.io.DataInputStream;
import java.net.ServerSocket;
import java.net.Socket;

class Test
{
    public static void main(String[] args)
    {
        byte[] messageByte = new byte[1000];
        boolean end = false;
        String dataString = "";

        try 
        {
            Socket clientSocket;
            ServerSocket server;

            server = new ServerSocket(30501, 100);
            clientSocket = server.accept();

            DataInputStream in = new DataInputStream(clientSocket.getInputStream());
            int bytesRead = 0;

            messageByte[0] = in.readByte();
            messageByte[1] = in.readByte();
            ByteBuffer byteBuffer = ByteBuffer.wrap(messageByte, 0, 2);

            int bytesToRead = byteBuffer.getShort();
            System.out.println("About to read " + bytesToRead + " octets");

            //The following code shows in detail how to read from a TCP socket

            while(!end)
            {
                bytesRead = in.read(messageByte);
                dataString += new String(messageByte, 0, bytesRead);
                if (dataString.length() == bytesToRead )
                {
                    end = true;
                }
            }

            //All the code in the loop can be replaced by these two lines
            //in.readFully(messageByte, 0, bytesToRead);
            //dataString = new String(messageByte, 0, bytesToRead);

            System.out.println("MESSAGE: " + dataString);
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }
}

This can also be an issue with hyper-v settings on Windows 10 pro. Because with this error I was facing BSOD - https://www.techclassy.com/fix-hypervisor-error-bsod/

Traceback (most recent call last):
  File "tkwindowwithlabel5.py", line 23, in <module>
    main()
  File "tkwindowwithlabel5.py", line 16, in main
    window.resizeable(width = True, height =True)
  File "/usr/lib/python3.4/tkinter/__init__.py", line 1935, in                
  __getattr__
    return getattr(self.tk, attr)
AttributeError: 'tkapp' object has no attribute 'resizeable'

is what you will get with the first answer. tk does support min and max size

window.minsize(width = X, height = x)
window.maxsize(width = X, height = x)

i figured it out but just trying the first one. using python3 with tk.

Using a comma may not be sufficient if you have multiple jQuery objects that need to be joined.

The .add() method adds the selected elements to the result set:

// classA OR classB
jQuery('.classA').add('.classB');

It's more verbose than '.classA, .classB', but lets you build more complex selectors like the following:

// (classA which has <p> descendant) OR (<div> ancestors of classB)
jQuery('.classA').has('p').add(jQuery('.classB').parents('div'));

An alternative is to use OFFSET:

Assuming the column value is stored in B1, you can use the following

C1 = OFFSET(A1, 0, B1 - 1)

This works by:

a) taking a base cell (A1)
b) adding 0 to the row (keeping it as A)
c) adding (A5 - 1) to the column

You can also use another value instead of 0 if you want to change the row value too.

There are several "compilers" of PHP code. Most of them do not support all of PHP features, since these simply must be interpreted during run time.

We are using Phalanger - http://www.php-compiler.net/ - that is supporting even those dirty PHP dynamic features, and still is able to compile them as .NET assembly, that can be distributed as a standalone DLL.

If i understand you correctly, (i probably don't)

'SELECT @RowCount = COUNT(*)
                   FROM dbo.Comm_Services
                   WHERE CompanyId = ' + CAST(@CompanyId AS CHAR) + '
                   AND ' + @condition

I recommend that you get in the habit, right now, of using ANSI-style joins, meaning you should use the INNER JOIN, LEFT OUTER JOIN, RIGHT OUTER JOIN, FULL OUTER JOIN, and CROSS JOIN elements in your SQL statements rather than using the "old-style" joins where all the tables are named together in the FROM clause and all the join conditions are put in the the WHERE clause. ANSI-style joins are easier to understand and less likely to be miswritten and/or misinterpreted than "old-style" joins.

I'd rewrite your query as:

SELECT bc.firstname,
       bc.lastname,
       b.title,
       TO_CHAR(bo.orderdate, 'MM/DD/YYYY') "Order Date",
       p.publishername
FROM BOOK_CUSTOMER bc
INNER JOIN books b
  ON b.BOOK_ID = bc.BOOK_ID
INNER JOIN  book_order bo
  ON bo.BOOK_ID = b.BOOK_ID
INNER JOIN publisher p
  ON p.PUBLISHER_ID = b.PUBLISHER_ID
WHERE p.publishername = 'PRINTING IS US';

Share and enjoy.

If I understand the question correctly, you want to detect when the h_no doesn't increase and then increment the class. (I'm going to walk through how I solved this problem, there is a self-contained function at the end.)

Working

We only care about the h_no column for the moment, so we can extract that from the data frame:

> h_no <- data$h_no

We want to detect when h_no doesn't go up, which we can do by working out when the difference between successive elements is either negative or zero. R provides the diff function which gives us the vector of differences:

> d.h_no <- diff(h_no)
> d.h_no
 [1]  1  1  1 -3  1  1  1  1  1  1 -6  1  1  1

Once we have that, it is a simple matter to find the ones that are non-positive:

> nonpos <- d.h_no <= 0
> nonpos
 [1] FALSE FALSE FALSE  TRUE FALSE FALSE FALSE FALSE FALSE FALSE  TRUE FALSE
[13] FALSE FALSE

In R, TRUE and FALSE are basically the same as 1 and 0, so if we get the cumulative sum of nonpos, it will increase by 1 in (almost) the appropriate spots. The cumsum function (which is basically the opposite of diff) can do this.

> cumsum(nonpos)
 [1] 0 0 0 1 1 1 1 1 1 1 2 2 2 2

But, there are two problems: the numbers are one too small; and, we are missing the first element (there should be four in the first class).

The first problem is simply solved: 1+cumsum(nonpos). And the second just requires adding a 1 to the front of the vector, since the first element is always in class 1:

 > classes <- c(1, 1 + cumsum(nonpos))
 > classes
  [1] 1 1 1 1 2 2 2 2 2 2 2 3 3 3 3

Now, we can attach it back onto our data frame with cbind (by using the class= syntax, we can give the column the class heading):

 > data_w_classes <- cbind(data, class=classes)

And data_w_classes now contains the result.

Final result

We can compress the lines together and wrap it all up into a function to make it easier to use:

classify <- function(data) {
   cbind(data, class=c(1, 1 + cumsum(diff(data$h_no) <= 0)))
}

Or, since it makes sense for the class to be a factor:

classify <- function(data) {
   cbind(data, class=factor(c(1, 1 + cumsum(diff(data$h_no) <= 0))))
}

You use either function like:

> classified <- classify(data) # doesn't overwrite data
> data <- classify(data) # data now has the "class" column

(This method of solving this problem is good because it avoids explicit iteration, which is generally recommend for R, and avoids generating lots of intermediate vectors and list etc. And also it's kinda neat how it can be written on one line :) )

Refer the react-native official documentation on Generating Signed APK

React-Native Generating Signed APK

Complementing the @slonik's answer.

You can test socat to create Virtual Serial Port doing the following procedure (tested on Ubuntu 12.04):

Open a terminal (let's call it Terminal 0) and execute it:

socat -d -d pty,raw,echo=0 pty,raw,echo=0

The code above returns:

2013/11/01 13:47:27 socat[2506] N PTY is /dev/pts/2
2013/11/01 13:47:27 socat[2506] N PTY is /dev/pts/3
2013/11/01 13:47:27 socat[2506] N starting data transfer loop with FDs [3,3] and [5,5]

Open another terminal and write (Terminal 1):

cat < /dev/pts/2

this command's port name can be changed according to the pc. it's depends on the previous output.

2013/11/01 13:47:27 socat[2506] N PTY is /dev/pts/**2**
2013/11/01 13:47:27 socat[2506] N PTY is /dev/pts/**3**
2013/11/01 13:47:27 socat[2506] N starting data transfer loop with FDs 

you should use the number available on highlighted area.

Open another terminal and write (Terminal 2):

echo "Test" > /dev/pts/3

Now back to Terminal 1 and you'll see the string "Test".

    /**
 * Remove an onclick listener
 *
 * @param view
 * @author [email protected]
 * @website https://github.com/androidmalin
 * @data 2016-05-16
 */
public static void unBingListener(View view) {
    if (view != null) {
        try {
            if (view.hasOnClickListeners()) {
                view.setOnClickListener(null);

            }

            if (view.getOnFocusChangeListener() != null) {
                view.setOnFocusChangeListener(null);

            }

            if (view instanceof ViewGroup && !(view instanceof AdapterView)) {
                ViewGroup viewGroup = (ViewGroup) view;
                int viewGroupChildCount = viewGroup.getChildCount();
                for (int i = 0; i < viewGroupChildCount; i++) {
                    unBingListener(viewGroup.getChildAt(i));
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}

This help me to make the image 150% with ease.

.img-popup img {
  transform: scale(1.5);
}

To append to an array, just use the += operator.

$Target += $TargetObject

Also, you need to declare $Target = @() before your loop because otherwise, it will empty the array every loop.

var array = new Uint8Array(100);    
array[10] = 256;
array[10] === 0 // true

I verified in firefox and chrome, its really an array of bytes :

var array = new Uint8Array(1024*1024*50);  // allocates 50MBytes

I used custom installation instead of standard and that solved the issue! (just select custom and you can then install everything like the standard)

You can try this code. This is Simple PHP Image Deleting code from the server.

<form method="post">
<input type="text" name="photoname"> // You can type your image name here...
<input type="submit" name="submit" value="Delete">
</form>

<?php
if (isset($_POST['submit'])) 
{
$photoname = $_POST['photoname'];
if (!unlink($photoname))
  {
  echo ("Error deleting $photoname");
  }
else
  {
  echo ("Deleted $photoname");
  }
}
?>

Just wanted to point out to everyone calling File.mkdir() or File.mkdirs() to be careful the File object is a directory and not a file. For example if you call mkdirs() for the path /dir1/dir2/file.txt, it will create a folder with the name file.txt which is probably not what you wanted. If you are creating a new file and also want to automatically create parent folders you can do something like this:

            File file = new File(filePath);
            if (file.getParentFile() != null) {
                file.getParentFile().mkdirs();
            }

findByInventoryIdIn(List<Long> inventoryIdList) should do the trick.

The HTTP request parameter format would be like so:

Yes ?id=1,2,3
No  ?id=1&id=2&id=3

The complete list of JPA repository keywords can be found in the current documentation listing. It shows that IsIn is equivalent – if you prefer the verb for readability – and that JPA also supports NotIn and IsNotIn.

You can use values() method:

For instance Status.values()[0] will return PAUSE in your case, if you print it, toString() will be called and "PAUSE" will be printed.

The quick start guide that keyboardsurfer references will work if you need to get your project to build properly, but it leaves you with a dummy google-play-services project in your Eclipse workspace, and it doesn't properly link Eclipse to the Google Play Services Javadocs.

Here's what I did instead:

1. Install the Google Play Services SDK using the instructions in the Android Maps V2 Quick Start referenced above, or the instructions to Setup Google Play Services SDK, but do not follow the instructions to add Google Play Services into your project.

2. Right click on the project in the Package Explorer, select Properties to open the properties for your project.

3. (Only if you already followed the instructions in the quick start guide!) Remove the dependency on the google-play-services project:

   • Click on the Android category and remove the reference to the google-play-services project.

   • Click on the Java Build Path category, then the Projects tab and remove the reference to the google-play-services project.

4. Click on the Java Build Path category, then the Libraries tab.

5. Click Add External JARs... and select the google-play-services.jar file. This should be in [Your ADT directory]\sdk\extras\google\google_play_services\libproject\google-play-services_lib\libs.

6. Click on the arrow next to the new google-play-services.jar entry, and select the Javadoc Location item.

7. Click Edit... and select the folder containing the Google Play Services Javadocs. This should be in [Your ADT directory]\sdk\extras\google\google_play_services\docs\reference.

8. Still in the Java Build Path category, click on the Order and Export tab. Check the box next to the google-play-services.jar entry.

9. Click OK to save your project properties.

Your project should now have access to the Google Play Services library, and the Javadocs should display properly in Eclipse.

Specify negative value to spread value. This works for me:

box-shadow: 0 2px 3px -1px rgba(0, 0, 0, 0.1);

To show months as Jan 2017 Feb 2017 etc:

scale_x_date(date_breaks = "1 month", date_labels =  "%b %Y") 

Angle the dates if they take up too much space:

theme(axis.text.x=element_text(angle=60, hjust=1))

The accepted answer needs a little clarification. The row will be there if CLR is enabled or disabled. Value will be 1 if enabled, or 0 if disabled.

I use this script to enable on a server, if the option is disabled:

if not exists(
    SELECT value
    FROM sys.configurations
    WHERE name = 'clr enabled'
     and value = 1
)
begin
    exec sp_configure @configname=clr_enabled, @configvalue=1
    reconfigure
end

There is no my.cnf by default. As such, MySQL starts with all of the default settings. If you want to create your own my.cnf to override any defaults, place it at /etc/my.cnf.

Also, you can run mysql --help and look through it for the conf locations listed.

Default options are read from the following files in the given order:
/etc/my.cnf /etc/mysql/my.cnf /usr/etc/my.cnf ~/.my.cnf 
The following groups are read: mysql client
The following options may be given as the first argument:
--print-defaults        Print the program argument list and exit.
--no-defaults           Don't read default options from any option file.
--defaults-file=#       Only read default options from the given file #.
--defaults-extra-file=# Read this file after the global files are read.

As you can see, there are also some options for bypassing the conf files, or specifying other files to read when you invoke mysql on the command line.

I've solved just using this plugin: http://dotdotdot.frebsite.nl/

it automatically sets a max height to the target and adds three dots

I found a tricky solution. Lets call the same function twice but with different id.

JQuery Code

$(function() {
    $( "#accordion1" ).accordion({
        collapsible: true, active: false, heightStyle: "content"
    });
    $( "#accordion2" ).accordion({
        collapsible: true, active: false, heightStyle: "content"
    });
});

HTML Code

<div id="accordion1">
    <h3>Section 1</h3>
    <div>Section one Text</div>
</div>
<div id="accordion2">   
    <h3>Section 2</h3>
    <div>Section two Text</div>
</div>

Try this function for get root directory path:

get_template_directory_uri();

CharSequence = interface
String = concrete implementation

• CharSequence is an interface.
• Several classes implement this interface.
  • String is one such class, a concrete implementation of CharSequence.

You said:

converting from one to another

There is no converting from String.

• Every String object is a CharSequence.
• Every CharSequence can produce a String. Call CharSequence::toString. If the CharSequence happens to be a String, then the method returns a reference to its own object.

In other words, every String is a CharSequence, but not every CharSequence is a String.

Programming to an interface

Programming in Android, most of the text values are expected in CharSequence.

Why is that? What is the benefit, and what are the main impacts of using CharSequence over String?

Generally, programming to an interface is better than programming to concrete classes. This yields flexibility, so we can switch between concrete implementations of a particular interface without breaking other code.

When developing an API to be used by various programmers in various situations, write your code to give and take the most general interfaces possible. This gives the calling programmer the freedom to use various implementations of that interface, whichever implementation is best for their particular context.

For example, look at the Java Collections Framework. If your API gives or takes an ordered collection of objects, declare your methods as using List rather than ArrayList, LinkedList, or any other 3rd-party implementation of List.

When writing a quick-and-dirty little method to be used only by your code in one specific place, as opposed to writing an API to be used in multiple places, you need not bother with using the more general interface rather than a specific concrete class. But even then, it does to hurt to use the most general interface you can.

What are the main differences, and what issues are expected, while using them,

• With a String you know you have a single piece of text, entirely in memory, and is immutable.
• With a CharSequence, you do not know what the particular features of the concrete implementation might be.

The CharSequence object might represent an enormous chunk of text, and therefore has memory implications. Or may be many chunks of text tracked separately that will need to be stitched together when you call toString, and therefore has performance issues. The implementation may even be retrieving text from a remote service, and therefore has latency implications.

and converting from one to another?

You generally won't be converting back and forth. A String is a CharSequence. If your method declares that it takes a CharSequence, the calling programmer may pass a String object, or may pass something else such as a StringBuffer or StringBuilder. Your method's code will simply use whatever is passed, calling any of the CharSequence methods.

The closest you would get to converting is if your code receives a CharSequence and you know you need a String. Perhaps your are interfacing with old code written to String class rather than written to the CharSequence interface. Or perhaps your code will work intensively with the text, such as looping repeatedly or otherwise analyzing. In that case, you want to take any possible performance hit only once, so you call toString up front. Then proceed with your work using what you know to be a single piece of text entirely in memory.

Twisted history

Note the comments made on the accepted Answer. The CharSequence interface was retrofitted onto existing class structures, so there are some important subtleties (equals() & hashCode()). Notice the various versions of Java (1, 2, 4 & 5) tagged on the classes/interfaces—quite a bit of churn over the years. Ideally CharSequence would have been in place from the beginning, but such is life.

My class diagram below may help you see the big picture of string types in Java 7/8. I'm not sure if all of these are present in Android, but the overall context may still prove useful to you.

It's called an initialization list. An initializer list is how you pass arguments to your member variables' constructors and for passing arguments to the parent class's constructor.

If you use = to assign in the constructor body, first the default constructor is called, then the assignment operator is called. This is a bit wasteful, and sometimes there's no equivalent assignment operator.

I have had to unpack a .ab-file, too and found this post while looking for an answer. My suggested solution is Android Backup Extractor, a free Java tool for Windows, Linux and Mac OS.

Make sure to take a look at the README, if you encounter a problem. You might have to download further files, if your .ab-file is password-protected.

Usage:

java -jar abe.jar [-debug] [-useenv=yourenv] unpack <backup.ab> <backup.tar> [password]

Example:

Let's say, you've got a file test.ab, which is not password-protected, you're using Windows and want the resulting .tar-Archive to be called test.tar. Then your command should be:

java.exe -jar abe.jar unpack test.ab test.tar ""

There's an alternative approach to this:

#include <iterator>
#include <algorithm>

// ...

    copy(istream_iterator<int>(iFile), istream_iterator<int>(),
         ostream_iterator<int>(cerr, "\n"));

Yes we can use. CSS reset as a {outline:none} and also

a:focus, a:active {outline:none} for the Best Practice in Resetting CSS, The Best Solution is using common :focus{outline:none} If you still have Best Option please Share

I just moved to Spring Boot 1.4 and found these properties were renamed:

spring.datasource.dbcp.test-while-idle=true
spring.datasource.dbcp.time-between-eviction-runs-millis=3600000
spring.datasource.dbcp.validation-query=SELECT 1

You can use its interface HTMLButtonElement that inherits from its parent HTMLElement !

This way you will be able to have auto-completion...

<button (click)="toggle($event)" class="someclass otherClass" id="btn1"></button>

toggle(event: MouseEvent) {
    const button = event.target as HTMLButtonElement;
    console.log(button.id);
    console.log(button.className);
 }

To see all list of HTMLElement from the World Wide Web Consortium (W3C) documentation

StackBlitz demo

Write this line after your insert code

 ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('Insert is successfull')", true);

i got the same issue, i updated the hosts file with the server address and it worked

No need to define a new interface when you can use an existing one: android.os.Handler.Callback. Pass an object of type Callback, and invoke callback's handleMessage(Message msg).

While you're waiting.. Curved corner (border-radius) cross browser

Never use AsynTask to perform network request or whatever that need to be persisted. Async Task are strongly tied to your activity and if the user change the orientation of the screen since the App is re created the AsyncTask will be stopped.

I suggest you to use Service pattern with Intent Service and ResultReceiver. Take a look to RESTDroid. It's a library that allows you to perform any kind of REST request asynchronously and notify your UI with Request Listeners implementing the Virgil Dobjanschi's service pattern.

There are quite a few ways to work with dynamic arrays in PHP. Initialise an array:

$array = array();

Add to an array:

$array[] = "item"; // for your $arr1 
$array[$key] = "item"; // for your $arr2
array_push($array, "item", "another item");

Remove from an array:

$item = array_pop($array);
$item = array_shift($array);
unset($array[$key]);

There are plenty more ways, these are just some examples.

If you did have installed Grunt package by running npm install -g grunt and it still say's No command 'grunt' found or grunt: command not found, a quick and dirty way to get this working is linking node binaries to your $PATH manually.

On MacOSX/Linux you can add this line to your ~/.bash_profile or ~/.bashrc file.

PATH=$PATH:/usr/local/Cellar/node/HEAD/bin # Add NPM binaries

You probably should replace /usr/local/Cellar/node/HEAD/bin by the path where your node binaries could be found.

If this is quick and dirty to me, it's because everything should work without doing this, but for an unknown reason, a link seem broken. As nobody on IRC could tell me why this happened, I found my own way to make it (grunt) work.

PS: This should help you make grunt works, this answer is not jquery-ui related.

Update 02/2013 : You should take a look at @tom-p's answer which explains better what is going on. Tom gives us the real solution instead of hacking your bashrc file : both should work, but you should try installing grunt-cli first.

What about just using virtual desktops? You can spread your windows around among multiple workspaces. Something like Virtual Dimension should give you most of that functionality. I use virtual desktops all the time on Linux, and it's the next best thing to multiple monitors.

you can use regular expressions to identify the last comma (,) and replace it with " " as follow:

if(fieldName.endsWith(","))
{                           
fieldName = fieldName.replace(/,([^,]*)$/," ");
}

Build.VERSION.RELEASE;

That will give you the actual numbers of your version; aka 2.3.3 or 2.2. The problem with using Build.VERSION.SDK_INT is if you have a rooted phone or custom rom, you could have a non standard OS (aka my android is running 2.3.5) and that will return a null when using Build.VERSION.SDK_INT so Build.VERSION.RELEASE will work no matter using standard Android version or not !

To use it, you could just do this;

String androidOS = Build.VERSION.RELEASE;

In general, if you don't know how something works, look for an example which you can learn from.

For this problem, consider this DEMO

You can see loading content with AJAX is very easily accomplished with jQuery:

$(function(){
    // don't cache ajax or content won't be fresh
    $.ajaxSetup ({
        cache: false
    });
    var ajax_load = "<img src='http://automobiles.honda.com/images/current-offers/small-loading.gif' alt='loading...' />";

    // load() functions
    var loadUrl = "http://fiddle.jshell.net/deborah/pkmvD/show/";
    $("#loadbasic").click(function(){
        $("#result").html(ajax_load).load(loadUrl);
    });

// end  
});

Try to understand how this works and then try replicating it. Good luck.

You can find the corresponding tutorial HERE

Update

Right now the following event starts the ajax load function:

$("#loadbasic").click(function(){
        $("#result").html(ajax_load).load(loadUrl);
    });

You can also do this periodically: How to fire AJAX request Periodically?

(function worker() {
  $.ajax({
    url: 'ajax/test.html', 
    success: function(data) {
      $('.result').html(data);
    },
    complete: function() {
      // Schedule the next request when the current one's complete
      setTimeout(worker, 5000);
    }
  });
})();

I made a demo of this implementation for you HERE. In this demo, every 2 seconds (setTimeout(worker, 2000);) the content is updated.

You can also just load the data immediately:

$("#result").html(ajax_load).load(loadUrl);

Which has THIS corresponding demo.

Here is a code sample that explains how to get battery information.

To sum it up, a broadcast receiver for the ACTION_BATTERY_CHANGED intent is set up dynamically, because it can not be received through components declared in manifests, only by explicitly registering for it with Context.registerReceiver().

public class Main extends Activity {
  private TextView batteryTxt;
  private BroadcastReceiver mBatInfoReceiver = new BroadcastReceiver(){
    @Override
    public void onReceive(Context ctxt, Intent intent) {
      int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
      int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
      float batteryPct = level * 100 / (float)scale;
      batteryTxt.setText(String.valueOf(batteryPct) + "%");
    }
  };

  @Override
  public void onCreate(Bundle b) {
    super.onCreate(b);
    setContentView(R.layout.main);
    batteryTxt = (TextView) this.findViewById(R.id.batteryTxt);
    this.registerReceiver(this.mBatInfoReceiver, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
  }
}

I want to enhance Mr. Kamran Ali's answer with pictorial view.

Pictorial View is given step by step:

1. Go to "Database" Menu option
2. Select the "Reverse Engineer" option.

3. A wizard will come. Select from "Stored Connection" and press "Next" button.

4. Then "Next"..to.."Finish"

Enjoy :)

If you have a QMainWindow you can override closeEvent method.

#include <QCloseEvent>
void MainWindow::closeEvent (QCloseEvent *event)
{
    QMessageBox::StandardButton resBtn = QMessageBox::question( this, APP_NAME,
                                                                tr("Are you sure?\n"),
                                                                QMessageBox::Cancel | QMessageBox::No | QMessageBox::Yes,
                                                                QMessageBox::Yes);
    if (resBtn != QMessageBox::Yes) {
        event->ignore();
    } else {
        event->accept();
    }
}

If you're subclassing a QDialog, the closeEvent will not be called and so you have to override reject():

void MyDialog::reject()
{
    QMessageBox::StandardButton resBtn = QMessageBox::Yes;
    if (changes) {
        resBtn = QMessageBox::question( this, APP_NAME,
                                        tr("Are you sure?\n"),
                                        QMessageBox::Cancel | QMessageBox::No | QMessageBox::Yes,
                                        QMessageBox::Yes);
    }
    if (resBtn == QMessageBox::Yes) {
        QDialog::reject();
    }
}

Much easier with numpy:

>>> arr = np.array([[1,2,3],[4,5,6],[7,8,9]])
>>> arr
array([[1, 2, 3],
       [4, 5, 6],
       [7, 8, 9]])
>>> arr.T
array([[1, 4, 7],
       [2, 5, 8],
       [3, 6, 9]])
>>> theArray = np.array([['a','b','c'],['d','e','f'],['g','h','i']])
>>> theArray 
array([['a', 'b', 'c'],
       ['d', 'e', 'f'],
       ['g', 'h', 'i']], 
      dtype='|S1')
>>> theArray.T
array([['a', 'd', 'g'],
       ['b', 'e', 'h'],
       ['c', 'f', 'i']], 
      dtype='|S1')

You cannot save anything inside the app's bundle, but you can use +[NSData dataWithContentsOfURL:] to store the image in your app's documents directory, e.g.:

NSData *imageData = [NSData dataWithContentsOfURL:myImageURL];
NSString *imagePath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0] stringByAppendingPathComponent:@"/myImage.png"];
[imageData writeToFile:imagePath atomically:YES];

Not exactly permanent, but it stays there at least until the user deletes the app.

The best way to solve your problem is to set the UseSystemPasswordChar property to true. Then, the Caps-lock message is shown when the user enters the field and the Caps-Lock is on (at least for Vista and Windows 7).

Another alternative is to set the PasswordChar property to a character value (* for example). This also triggers the automatic Caps-Lock handling.

Late to the party, here is a short one. It has these limitations:

• It only does a plain string sort of the SubItems' Texts
• It uses the ListView's Tag
• It assumes all clicked columns will be filled

You can register & unregister any ListView to its service; make sure the Sorting is set to None..:

public static class LvSort
{
    static List<ListView> LVs = new List<ListView>();
    public static void registerLV(ListView lv)
    {
        if (!LVs.Contains(lv) && lv is ListView)
        {
            LVs.Add(lv);
            lv.ColumnClick +=Lv_ColumnClick;
        }
    }
    public static void unRegisterLV(ListView lv)
    {
        if (LVs.Contains(lv) && lv is ListView)
        {
            LVs.Remove(lv);
            lv.ColumnClick -=Lv_ColumnClick;
        }
    }

    private static void Lv_ColumnClick(object sender, ColumnClickEventArgs e)
    {
        ListView lv = sender as ListView;
        if (lv == null) return;
        int c = e.Column;
        bool asc = (lv.Tag == null) || ( lv.Tag.ToString() != c+"");
        var items = lv.Items.Cast<ListViewItem>().ToList();
        var sorted =  asc ? items.OrderByDescending(x => x.SubItems[c].Text).ToList() :
                            items.OrderBy(x => x.SubItems[c].Text).ToList();
        lv.Items.Clear();
        lv.Items.AddRange(sorted.ToArray());
        if (asc) lv.Tag = c+""; else lv.Tag = null;
    }
}

To register simply do..:

public Form1()
{
    InitializeComponent();
    LvSort.registerLV(yourListView1);
}

Update:

Here is a slightly extended version that will let you sort all sorts of data types using any sorting rule you come up with. All you need to do is write a special string conversion for your data, add it to the function list and mark your columns. To do so simply put the column names appended with a marker string in the columns' Tags.

I have added one for sorting DataTimes and one for integers.

This version will also sort jagged ListViews, i.e. those with different numbers of subitems.

public static class LvCtl
{
    static List<ListView> LVs = new List<ListView>();

    delegate string  StringFrom (string s);

    static Dictionary<string, StringFrom> funx = new Dictionary<string, StringFrom>();

    public static void registerLV(ListView lv)
    {
        if (!LVs.Contains(lv) && lv is ListView)
        {
            LVs.Add(lv);
            lv.ColumnClick +=Lv_ColumnClick;

            funx.Add("", stringFromString);
            for (int i = 0; i <  lv.Columns.Count; i++)
            {
                if (lv.Columns[i].Tag == null) continue;
                string n = lv.Columns[i].Tag.ToString();
                if (n == "") continue;
                if (n.Contains("__date")) funx.Add(n, stringFromDate);
                if (n.Contains("__int")) funx.Add(n, stringFromInt);
                else funx.Add(n, stringFromString);
            }

        }
    }

    static string stringFromString(string s)
    {
        return s;
    }
    static string stringFromInt(string s)
    {
        int i = 0;
        int.TryParse(s, out i);
        return i.ToString("00000") ;
    }
    static string stringFromDate(string s)
    {
        DateTime dt = Convert.ToDateTime(s);
        return dt.ToString("yyyy.MM.dd HH.mm.ss");
    }

    private static void Lv_ColumnClick(object sender, ColumnClickEventArgs e)
    {
        ListView lv = sender as ListView;
        if (lv == null) return;


        int c = e.Column;
        string nt = lv.Columns[c].Tag != null ? lv.Columns[c].Tag.ToString() : "";
        string n = nt.Replace("__", "§").Split('§')[0];

        bool asc = (lv.Tag == null) || ( lv.Tag.ToString() != c+"");
        var items = lv.Items.Cast<ListViewItem>().ToList();
        var sorted =  asc?
            items.OrderByDescending(x =>  funx[nt]( c < x.SubItems.Count ?
                                    x.SubItems[c].Text: "")).ToList() :
            items.OrderBy(x => funx[nt](c < x.SubItems.Count ?
                          x.SubItems[c].Text : "")).ToList();
        lv.Items.Clear();
        lv.Items.AddRange(sorted.ToArray());
        if (asc) lv.Tag = c+""; else lv.Tag = null;
    }

    public static void unRegisterLV(ListView lv)
    {
        if (LVs.Contains(lv) && lv is ListView)
        {
            LVs.Remove(lv);
            lv.ColumnClick -=Lv_ColumnClick;
        }
    }
}

In case someone gets similar issues, I had such an issue while inflating the view:

View.inflate(getApplicationContext(), R.layout.my_layout, null)

fixed by replacing getApplicationContext() with this

It's convenient to define a macro for get current timestamp

class Constant {
    struct Time {
        let now = { round(NSDate().timeIntervalSince1970) } // seconds
    }
} 

Then you can use let timestamp = Constant.Time.now()

Assuming that empty spaces and all leading and trailing white spaces should be removed:

import "strings"
if len(strings.TrimSpace(s)) == 0 { ... }

Because :
len("") // is 0
len(" ") // one empty space is 1
len(" ") // two empty spaces is 2

another solution is to add toggle=false to the collapse target, this will stop it randomly opening and closing which happens if you just remove the "in"

eg

<div class="accordion-heading">
    <a class="accordion-toggle"
        data-toggle="collapse"
        data-parent="#accordion2"
        href="#collapseOne">Open!</a>
</div>
<div
    id="collapseOne"
    class="accordion-body collapse"
    data-toggle="false"
    >
    <div class="span6">
        <div class="well well-small">
            <div class="accordion-toggle">
                ...some text...
            </div>
        </div>
    </div>
    <div class="span2"></div>                            
</div>

Oh, the fun of a snippet!

if (!function_exists('base_url')) {
    function base_url($atRoot=FALSE, $atCore=FALSE, $parse=FALSE){
        if (isset($_SERVER['HTTP_HOST'])) {
            $http = isset($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) !== 'off' ? 'https' : 'http';
            $hostname = $_SERVER['HTTP_HOST'];
            $dir =  str_replace(basename($_SERVER['SCRIPT_NAME']), '', $_SERVER['SCRIPT_NAME']);

            $core = preg_split('@/@', str_replace($_SERVER['DOCUMENT_ROOT'], '', realpath(dirname(__FILE__))), NULL, PREG_SPLIT_NO_EMPTY);
            $core = $core[0];

            $tmplt = $atRoot ? ($atCore ? "%s://%s/%s/" : "%s://%s/") : ($atCore ? "%s://%s/%s/" : "%s://%s%s");
            $end = $atRoot ? ($atCore ? $core : $hostname) : ($atCore ? $core : $dir);
            $base_url = sprintf( $tmplt, $http, $hostname, $end );
        }
        else $base_url = 'http://localhost/';

        if ($parse) {
            $base_url = parse_url($base_url);
            if (isset($base_url['path'])) if ($base_url['path'] == '/') $base_url['path'] = '';
        }

        return $base_url;
    }
}

It has beautiful returns like:

// A URL like http://stackoverflow.com/questions/189113/how-do-i-get-current-page-full-url-in-php-on-a-windows-iis-server:

echo base_url();    // Will produce something like: http://stackoverflow.com/questions/189113/
echo base_url(TRUE);    // Will produce something like: http://stackoverflow.com/
echo base_url(TRUE, TRUE); || echo base_url(NULL, TRUE); //Will produce something like: http://stackoverflow.com/questions/

// And finally:
echo base_url(NULL, NULL, TRUE);
// Will produce something like:
//      array(3) {
//          ["scheme"]=>
//          string(4) "http"
//          ["host"]=>
//          string(12) "stackoverflow.com"
//          ["path"]=>
//          string(35) "/questions/189113/"
//      }

For something very simple and lightweight (slightly modified from here):

from Queue import Queue
from threading import Thread


class Worker(Thread):
    """Thread executing tasks from a given tasks queue"""
    def __init__(self, tasks):
        Thread.__init__(self)
        self.tasks = tasks
        self.daemon = True
        self.start()

    def run(self):
        while True:
            func, args, kargs = self.tasks.get()
            try:
                func(*args, **kargs)
            except Exception, e:
                print e
            finally:
                self.tasks.task_done()


class ThreadPool:
    """Pool of threads consuming tasks from a queue"""
    def __init__(self, num_threads):
        self.tasks = Queue(num_threads)
        for _ in range(num_threads):
            Worker(self.tasks)

    def add_task(self, func, *args, **kargs):
        """Add a task to the queue"""
        self.tasks.put((func, args, kargs))

    def wait_completion(self):
        """Wait for completion of all the tasks in the queue"""
        self.tasks.join()

if __name__ == '__main__':
    from random import randrange
    from time import sleep

    delays = [randrange(1, 10) for i in range(100)]

    def wait_delay(d):
        print 'sleeping for (%d)sec' % d
        sleep(d)

    pool = ThreadPool(20)

    for i, d in enumerate(delays):
        pool.add_task(wait_delay, d)

    pool.wait_completion()

To support callbacks on task completion you can just add the callback to the task tuple.

import re

class MyClass:
    a = "12"
    b = "34"

    def myfunc(self):
        return self.a

attributes = [a for a, v in MyClass.__dict__.items()
              if not re.match('<function.*?>', str(v))
              and not (a.startswith('__') and a.endswith('__'))]

For an instance of MyClass, such as

mc = MyClass()

use type(mc) in place of MyClass in the list comprehension. However, if one dynamically adds an attribute to mc, such as mc.c = "42", the attribute won't show up when using type(mc) in this strategy. It only gives the attributes of the original class.

To get the complete dictionary for a class instance, you would need to COMBINE the dictionaries of type(mc).__dict__ and mc.__dict__.

mc = MyClass()
mc.c = "42"

# Python 3.5
combined_dict = {**type(mc).__dict__, **mc.__dict__}

# Or Python < 3.5
def dict_union(d1, d2):
    z = d1.copy()
    z.update(d2)
    return z

combined_dict = dict_union(type(mc).__dict__, mc.__dict__)

attributes = [a for a, v in combined_dict.items()
              if not re.match('<function.*?>', str(v))
              and not (a.startswith('__') and a.endswith('__'))]

CoreUtils referred to in other posts does NOT show the real implementation of most of the functionality which I think you seek. In most cases it provides front-ends for the actual functions that retrieve the data, which can be found here:

It is build upon Gnulib with the actual source code in the lib-subdirectory

Yes, you can use numpy for that.

import numpy as np
a = arange(3,dtype=float)

a[0] = np.nan
a[1] = np.inf
a[2] = -np.inf

a # is now [nan,inf,-inf]

np.isnan(a[0]) # True
np.isinf(a[1]) # True
np.isinf(a[2]) # True

I stumbled on this question as I had the same error. Mine was due to a slightly different problem and since I resolved it on my own I thought it useful to share here. Original code with issue:

$comment = "$_POST['comment']";

Because of the enclosing double-quotes, the index is not dereferenced properly leading to the assignment error. In my case I chose to fix it like this:

$comment = "$_POST[comment]";

but dropping either pair of quotes works; it's a matter of style I suppose :)

using flex

 <View style={{ flexDirection: 'row',}}>
                  <Text style={{fontSize: 12, lineHeight: 30, color:'#9394B3' }}>left</Text>
                  <Text style={{ flex:1, fontSize: 16, lineHeight: 30, color:'#1D2359', textAlign:'right' }}>right</Text>
               </View>

Starting from Python 3.6, dict objects are now ordered by insertion order. It's officially in the specs of Python 3.7.

>>> words = {"python": 2, "blah": 4, "alice": 3}
>>> dict(sorted(words.items(), key=lambda x: x[1]))
{'python': 2, 'alice': 3, 'blah': 4}

Before that, you had to use OrderedDict.

Python 3.7 documentation says:

Changed in version 3.7: Dictionary order is guaranteed to be insertion order. This behavior was implementation detail of CPython from 3.6.

For Python 3xx:

import time
for i in range(10):
    time.sleep(0.2) 
    print ("\r Loading... {}".format(i)+str(i), end="")

Try this:

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);

Based on this forum post: https://groups.google.com/forum/#!topic/ggplot2/mK9DR3dKIBU

Sounds like the easiest thing to do is to add a line break (\n) before your x axis, and after your y axis labels. Seems a lot easier (although dumber) than the solutions posted above.

ggplot(mpg, aes(cty, hwy)) + 
    geom_point() + 
    xlab("\nYour_x_Label") + ylab("Your_y_Label\n")

Hope that helps!

#!/usr/bin/env bash

# Redirect stdout ( > ) into a named pipe ( >() ) running "tee"
exec > >(tee -i logfile.txt)

# Without this, only stdout would be captured - i.e. your
# log file would not contain any error messages.
# SEE (and upvote) the answer by Adam Spiers, which keeps STDERR
# as a separate stream - I did not want to steal from him by simply
# adding his answer to mine.
exec 2>&1

echo "foo"
echo "bar" >&2

Note that this is bash, not sh. If you invoke the script with sh myscript.sh, you will get an error along the lines of syntax error near unexpected token '>'.

If you are working with signal traps, you might want to use the tee -i option to avoid disruption of the output if a signal occurs. (Thanks to JamesThomasMoon1979 for the comment.)

Tools that change their output depending on whether they write to a pipe or a terminal (ls using colors and columnized output, for example) will detect the above construct as meaning that they output to a pipe.

There are options to enforce the colorizing / columnizing (e.g. ls -C --color=always). Note that this will result in the color codes being written to the logfile as well, making it less readable.

Of course you could use blocks as properties. But make sure they are declared as @property(copy). For example:

typedef void(^TestBlock)(void);

@interface SecondViewController : UIViewController
@property (nonatomic, copy) TestBlock block;
@end

In MRC, blocks capturing context variables are allocated in stack; they will be released when the stack frame is destroyed. If they are copied, a new block will be allocated in heap, which can be executed later on after the stack frame is poped.

select datename(DAY,GETDATE()) +'-'+ datename(MONTH,GETDATE()) +'- '+ 
       datename(YEAR,GETDATE()) as 'yourcolumnname'

A = filename

ftp = ftplib.FTP("IP")
ftp.login("USR Name", "Pass")
ftp.cwd("/Dir")


try:
    ftp.retrbinary("RETR " + filename ,open(A, 'wb').write)
except:
    print "Error"

I ran into this problem because I had multiple wildcard entries for the same ports. You can easily check this by executing apache2ctl -S:

# apache2ctl -S
[Wed Oct 22 18:02:18 2014] [warn] _default_ VirtualHost overlap on port 30000, the first has precedence
[Wed Oct 22 18:02:18 2014] [warn] _default_ VirtualHost overlap on port 20001, the first has precedence
VirtualHost configuration:
11.22.33.44:80       is a NameVirtualHost
         default server xxx.com (/etc/apache2/sites-enabled/xxx.com.conf:1)
         port 80 namevhost xxx.com (/etc/apache2/sites-enabled/xxx.com.conf:1)
         [...]
11.22.33.44:443      is a NameVirtualHost
         default server yyy.com (/etc/apache2/sites-enabled/yyy.com.conf:37)
         port 443 namevhost yyy.com (/etc/apache2/sites-enabled/yyy.com.conf:37)
wildcard NameVirtualHosts and _default_ servers:
*:80                   hostname.com (/etc/apache2/sites-enabled/000-default:1)
*:20001                hostname.com (/etc/apache2/sites-enabled/000-default:33)
*:30000                hostname.com (/etc/apache2/sites-enabled/000-default:57)
_default_:443          hostname.com (/etc/apache2/sites-enabled/default-ssl:2)
*:20001                hostname.com (/etc/apache2/sites-enabled/default-ssl:163)
*:30000                hostname.com (/etc/apache2/sites-enabled/default-ssl:178)
Syntax OK

Notice how at the beginning of the output are a couple of warning lines. These will indicate which ports are creating the problems (however you probably already knew that).

Next, look at the end of the output and you can see exactly which files and lines the virtualhosts are defined that are creating the problem. In the above example, port 20001 is assigned both in /etc/apache2/sites-enabled/000-default on line 33 and /etc/apache2/sites-enabled/default-ssl on line 163. Likewise *:30000 is listed in 2 places. The solution (in my case) was simply to delete one of the entries.

Just use a related field without setting many=True.

Note that also because you want the output named category_name, but the actual field is category, you need to use the source argument on the serializer field.

The following should give you the output you need...

class ItemSerializer(serializers.ModelSerializer):
    category_name = serializers.RelatedField(source='category', read_only=True)

    class Meta:
        model = Item
        fields = ('id', 'name', 'category_name')

After experimenting with this for a while I've found no unexpected consequences of restarting an activity. Also, I believe this is very similar to what Android does by default when the orientation changes, so I don't see a reason not to do it in a similar circumstance.

Try doing like this: array1.compare(array2)=true

Array.prototype.compare = function (array) {
    // if the other array is a falsy value, return
    if (!array)
        return false;

    // compare lengths - can save a lot of time
    if (this.length != array.length)
        return false;

    for (var i = 0, l=this.length; i < l; i++) {
        // Check if we have nested arrays
        if (this[i] instanceof Array && array[i] instanceof Array) {
            // recurse into the nested arrays
            if (!this[i].compare(array[i]))
                return false;
        }
        else if (this[i] != array[i]) {
            // Warning - two different object instances will never be equal: {x:20} != {x:20}
            return false;
        }
    }
    return true;
}

Trying to access an undefined variable will throw you a ReferenceError.

A solution to this is to use typeof:

if (typeof window === "undefined") {
  console.log("Oops, `window` is not defined")
}

or a try catch:

try { window } catch (err) {
  console.log("Oops, `window` is not defined")
}

While typeof window is probably the cleanest of the two, the try catch can still be useful in some cases.

function GetPixel(context, x, y)
{
    var p = context.getImageData(x, y, 1, 1).data; 
    var hex = "#" + ("000000" + rgbToHex(p[0], p[1], p[2])).slice(-6);  
    return hex;
}

function rgbToHex(r, g, b) {
    if (r > 255 || g > 255 || b > 255)
        throw "Invalid color component";
    return ((r << 16) | (g << 8) | b).toString(16);
}

Here was an idea i was thinking of:

Have an iframe on page and have a referencer.

Have a form in which you move the INPUT:File element to.

Form:  A processing page AND a target of the FRAME.

The result will post to the frame, and then you can just send the fetched data up a level to the image tag you want with something like:

data:image/png;base64,asdfasdfasdfasdfa

and the page loads.

I believe it works for me, and depending you might be able to do something like:

.aftersubmit(function(){
    stopPropigation()// or some other code which would prevent a refresh.
});

Look here at "u" and "s" patterns. First is without 'T' separator, and the second one is without timezone suffix.

You could put your text in a select statement such as...

SELECT 'Querying Table1' FROM dual;

You could use

Character.isWhitespace(c)

or any of the other available methods in the Character class.

  if (c == ' ')

also works.

var arrofobject = [{"id":"197","category":"Damskie"},{"id":"198","category":"M\u0119skie"}];_x000D_
var data = arrofobject.map(arrofobject => arrofobject);_x000D_
console.log(data)

for more details please look at jQuery.map()

It's best if you judge on your own,

1) Sublime works on Mac & Linux that may be its plus point, with VI mode that makes things easily searchable for the VI lover(UNIX & Linux).

http://text-editors.findthebest.com/compare/9-45/Notepad-vs-Sublime-Text

This Link is no more working so please watch this video for similar details Video

Initial observation revealed that everything else should work fine and almost similar;(with help of available plugins in notepad++)

Some Variation: Some user find plugins useful for PHP coders on that

http://codelikeapoem.com/2013/01/goodbye-notepad-hellooooo-sublime-text.html

although, there are many plugins for Notepad Plus Plus ..

I am not sure of your requirements, nor I am promoter of either of these editors :)

So, judge on basis of your requirements, this should satisfy you query...

Yes we can add that both are evolving and changing fast..

This might be a simple solution to achieve this:

INSERT INTO funds (ID, date, price)
SELECT 23, DATE('2013-02-12'), 22.5
  FROM dual
 WHERE NOT EXISTS (SELECT 1 
                     FROM funds 
                    WHERE ID = 23
                      AND date = DATE('2013-02-12'));

p.s. alternatively (if ID a primary key):

 INSERT INTO funds (ID, date, price)
    VALUES (23, DATE('2013-02-12'), 22.5)
        ON DUPLICATE KEY UPDATE ID = 23; -- or whatever you need

see this Fiddle.

Keystroke execution::: vi editing retains each permutation of typed keys. This creates a path in the decision tree which unambiguously identifies any command , whereas Emacs commands are a combination of typed keys executed immediately, which leaves the user with the choice of whether or not to use a command.

Memory usage and customizability::: vi is a smaller and faster program, with a more limited capacity for customization, whereas, Emacs takes longer to start up and requires more memory. However, it is highly customizable and includes a large number of features, as it is essentially an execution environment for a Lisp program designed for text-editing.

You can use proxytunnel:

proxytunnel -p yourproxy:8080 -d www.google.com:443 -a 7000

and then you can do this:

openssl s_client -connect localhost:7000 -showcerts

Hope this can help you!

I found this plugin to be doing what I was expecting: gulp-using

Simple usage example: Search all files in project with .jsx extension

gulp.task('reactify', function(){
        gulp.src(['../**/*.jsx']) 
            .pipe(using({}));
        ....
    });

Output:

[gulp] Using gulpfile /app/build/gulpfile.js
[gulp] Starting 'reactify'...
[gulp] Finished 'reactify' after 2.92 ms
[gulp] Using file /app/staging/web/content/view/logon.jsx
[gulp] Using file /app/staging/web/content/view/components/rauth.jsx

Pure JavaScript answer:

document.querySelector('.menu').classList.contains('active');

Might help someone someday.

Yes, you can use bash's built-in Arithmetic Expansion $(( )) to do some simple maths

$ echo "$((5 * 5))"
25

Check the Shell Arithmetic section in the Bash Reference Manual for a complete list of operators.

For sake of completeness, as other pointed out, if you need arbitrary precision, bc or dc would be better.

You can use a zip function with a list comprehension :

with open('ex.txt') as f:
    print zip(*[line.split() for line in f])[1]

result :

('10', '20', '30', '40', '23', '13')

If the image is in your resources folder and its build action is set to Resource. You can reference the image in XAML as follows:

"pack://application:,,,/Resources/Search.png"

Assuming you do not have any folder structure under the Resources folder and it is an application. For example I use:

ImageSource="pack://application:,,,/Resources/RibbonImages/CloseButton.png"

when I have a folder named RibbonImages under Resources folder.

Maybe it is not what you are looking for, but I had a similar problem and i solved it including JSON 2 to my application:

https://github.com/douglascrockford/JSON-js

Other browsers natively implements JSON but IE < 8 (also IE 8 compatibility mode) does not, that's why you need to include it.

Here is a related question: JSON on IE6 (IE7)

UPDATE

the JSON parser has been updated so you should use the new one: http://bestiejs.github.io/json3/

Here it worked on Mac OS X.

It includes the example of a BSD date, how to increment and decrement the date also:

for ((i=28; i>=6 ; i--));
do
    dat=`date -v-${i}d -j "+%Y%m%d"` 
    echo $dat
done

I have a proper solution of this problem, lets try and understand the root cause of this issue. This issue comes when remote servers ssl cannot be verified using root certificates in your system's certificate store or remote ssl is not installed along with chain certificates. If you have a linux system with root ssh access, then in this case you can try updating your certificate store with below command:

update-ca-certificates

If still, it doesn't work then you need to add root and interim certificate of remote server in your cert store. You can download root and intermediate certs and add them in /usr/local/share/ca-certificates directory and then run command update-ca-certificates. This should do the trick. Similarly for windows you can search how to add root and intermediate cert.

The other way you can solve this problem is by asking remote server team to add ssl certificate as a bundle of domain root cert, intermediate cert and root cert.

I found that the path to the image in my repo did not suffice, I had to link to the image on the raw.github.com subdomain.

URL format https://raw.github.com/{USERNAME}/{REPOSITORY}/{BRANCH}/{PATH}

Markdown example ![Settings Window](https://raw.github.com/ryanmaxwell/iArrived/master/Screenshots/Settings.png)

Please take a look at XML DOM Parser (W3Schools). It's a tutorial on XML DOM parsing. The actual DOM parser differs from browser to browser but the DOM API is standardised and remains the same (more or less).

Alternatively use E4X if you can restrict yourself to Firefox. It's relatively easier to use and it's part of JavaScript since version 1.6. Here is a small sample usage...

//Using E4X
var xmlDoc=new XML();
xmlDoc.load("note.xml");
document.write(xmlDoc.body); //Note: 'body' is actually a tag in note.xml,
//but it can be accessed as if it were a regular property of xmlDoc.

This answer is same as Laura's answer , however, in new eclipse versions you will not be able to see a "create project from existing source" option.

Hence you can do this instead:

• Goto File > New > Project

• Select the type of project, click Next

• Uncheck Use default location

• Click on Browse to navigate to your source folder, or type in the path to your source

• Click Finish

Taken from this discussion forum in eclipse.org

As @Ian explained, the problem is that jQuery's click() is not the same as the native one.

Therefore, consider using vanilla-js instead of jQuery:

var a = document.createElement('a');
a.href = "img.png";
a.download = "output.png";
document.body.appendChild(a);
a.click();
document.body.removeChild(a);

Demo

Should you ever crave deeper understanding, I heartily recommend Patterson and Hennessy as an intro and Hennessy and Patterson as an intermediate to advanced text. They're pricey, but truly non-pareil; I just wish either or both were available when I got my Masters' degree and entered the workforce designing chips, systems, and parts of system software for them (but, alas!, that was WAY too long ago;-). Stack pointers are so crucial (and the distinction between a microprocessor and any other kind of CPU so utterly meaningful in this context... or, for that matter, in ANY other context, in the last few decades...!-) that I doubt anything but a couple of thorough from-the-ground-up refreshers can help!-)

To list local packages with the version number use:

npm ls --depth=0

To list global packages with the version number use:

npm ls -g --depth=0

I believe you could try something like this:

var postData = 
            {
                "bid":bid,
                "location1":"1","quantity1":qty1,"price1":price1,
                "location2":"2","quantity2":qty2,"price2":price2,
                "location3":"3","quantity3":qty3,"price3":price3
            }
$.ajax({
        type: "POST",
        dataType: "json",
        url: "add_cart.php",
        data: postData,
        success: function(data){
            alert('Items added');
        },
        error: function(e){
            console.log(e.message);
        }
});

the json encode should happen automatically, and a dump of your post should give you something like:

array(
    "bid"=>bid,
    "location1"=>"1",
    "quantity1"=>qty1,
    "price1"=>price1,
    "location2"=>"2",
    "quantity2"=>qty2,
    "price2"=>price2,
    "location3"=>"3",
    "quantity3"=>qty3,
    "price3"=>price3
)

As @jwalkerjr mentioned, you should be disposing of connections in code (if connection pooling is enabled, they are just returned to the connection pool). The prescribed way to do this is using the 'using' statement:

// Execute stored proc to read data from repository
using (SqlConnection conn = new SqlConnection(this.connectionString))
{
    using (SqlCommand cmd = conn.CreateCommand())
    {
        cmd.CommandText = "LoadFromRepository";
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Parameters.AddWithValue("@ID", fileID);

        conn.Open();
        using (SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection))
        {
            if (rdr.Read())
            {
                filename = SaveToFileSystem(rdr, folderfilepath);
            }
        }
    }
}

you should make out two period time which are compile time and runtime time.for example:

//example 1 
"test" == "test" // --> true 
"test" == "te" + "st" // --> true

//example 2 
"test" == "!test".substring(1) // --> false
"test" == "!test".substring(1).intern() // --> true

in the one hand,in the example 1,we find the results are all return true,because in the compile time,the jvm will put the "test" to the pool of literal strings,if the jvm find "test" exists,then it will use the exists one,in example 1,the "test" strings are all point to the same memory address,so the example 1 will return true. in the other hand,in the example 2,the method of substring() execute in the runtime time, in the case of "test" == "!test".substring(1),the pool will create two string object,"test" and "!test",so they are different reference objects,so this case will return false,in the case of "test" == "!test".substring(1).intern(),the method of intern() will put the ""!test".substring(1)" to the pool of literal strings,so in this case,they are same reference objects,so will return true.

I assume that you want them sorted by something else also, to get a consistent ordering between all items where AVC is the same. For example by name:

var sortedList = list.OrderBy(x => c.AVC).ThenBy(x => x.Name).ToList();

I have created on time task in which the task which user wants to repeat, add in the Custom TimeTask run() method. it is successfully reoccurring.

 import java.text.SimpleDateFormat;
 import java.util.Calendar;
 import java.util.Timer;
 import java.util.TimerTask;

 import android.os.Bundle;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.Button;
 import android.widget.CheckBox;
 import android.widget.TextView;
 import android.app.Activity;
 import android.content.Intent;

 public class MainActivity extends Activity {

     CheckBox optSingleShot;
     Button btnStart, btnCancel;
     TextView textCounter;

     Timer timer;
     MyTimerTask myTimerTask;

     int tobeShown = 0  ;

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

    optSingleShot = (CheckBox)findViewById(R.id.singleshot);
    btnStart = (Button)findViewById(R.id.start);
    btnCancel = (Button)findViewById(R.id.cancel);
    textCounter = (TextView)findViewById(R.id.counter);
    tobeShown = 1;

    if(timer != null){
        timer.cancel();
    }

    //re-schedule timer here
    //otherwise, IllegalStateException of
    //"TimerTask is scheduled already" 
    //will be thrown
    timer = new Timer();
    myTimerTask = new MyTimerTask();

    if(optSingleShot.isChecked()){
        //singleshot delay 1000 ms
        timer.schedule(myTimerTask, 1000);
    }else{
        //delay 1000ms, repeat in 5000ms
        timer.schedule(myTimerTask, 1000, 1000);
    }

    btnStart.setOnClickListener(new OnClickListener(){

        @Override
        public void onClick(View arg0) {


            Intent i = new Intent(MainActivity.this, ActivityB.class);
            startActivity(i);

            /*if(timer != null){
                timer.cancel();
            }

            //re-schedule timer here
            //otherwise, IllegalStateException of
            //"TimerTask is scheduled already" 
            //will be thrown
            timer = new Timer();
            myTimerTask = new MyTimerTask();

            if(optSingleShot.isChecked()){
                //singleshot delay 1000 ms
                timer.schedule(myTimerTask, 1000);
            }else{
                //delay 1000ms, repeat in 5000ms
                timer.schedule(myTimerTask, 1000, 1000);
            }*/
        }});

    btnCancel.setOnClickListener(new OnClickListener(){

        @Override
        public void onClick(View v) {
            if (timer!=null){
                timer.cancel();
                timer = null;
            }
        }
    });

}

@Override
protected void onResume() {
    super.onResume();

    if(timer != null){
        timer.cancel();
    }

    //re-schedule timer here
    //otherwise, IllegalStateException of
    //"TimerTask is scheduled already" 
    //will be thrown
    timer = new Timer();
    myTimerTask = new MyTimerTask();

    if(optSingleShot.isChecked()){
        //singleshot delay 1000 ms
        timer.schedule(myTimerTask, 1000);
    }else{
        //delay 1000ms, repeat in 5000ms
        timer.schedule(myTimerTask, 1000, 1000);
    }
}


@Override
protected void onPause() {
    super.onPause();

    if (timer!=null){
        timer.cancel();
        timer = null;
    }

}

@Override
protected void onStop() {
    super.onStop();

    if (timer!=null){
        timer.cancel();
        timer = null;
    }

}

class MyTimerTask extends TimerTask {

    @Override
    public void run() {

        Calendar calendar = Calendar.getInstance();
        SimpleDateFormat simpleDateFormat = 
                new SimpleDateFormat("dd:MMMM:yyyy HH:mm:ss a");
        final String strDate = simpleDateFormat.format(calendar.getTime());

        runOnUiThread(new Runnable(){

            @Override
            public void run() {
                textCounter.setText(strDate);
            }});
    }
}

}

I think the easiest (and maybe most elegant) solution here is to leverage the fact that you can set default to a callable. So, to get around admin's special handling of auto_now, you can just declare the field like so:

from django.utils import timezone
date_field = models.DateField(default=timezone.now)

It's important that you don't use timezone.now() as the default value wouldn't update (i.e., default gets set only when the code is loaded). If you find yourself doing this a lot, you could create a custom field. However, this is pretty DRY already I think.

For purposes like this one I use VLC as a redistribution server. You said you get to catch the video with VLC? Right-click on the media in VLC, select "stream" and choose your options. You can also do it with command line, which gives you potential benefits of various option (transcoding, scaling, compressing, desinterlacing). Here is a batch that starts VLC distribution from source to its own 555 port (so you will have to type rstp://myvlcserveripaddress:555 in your src option on the webpage to get the stream)

cd \
cd C:\Program Files (x86)\VideoLAN\VLC\

vlc --logo-file C:\logo.png --logo-position 5 --logo-opacity 200 --logo-x 900 --logo-y -2 "mmsh://typeyoursourceIPhere:554" :sout=#transcode{vcodec=div3,vb=800,scale=0,acodec=mpga,ab=128,channels=2,samplerate=44100}:duplicate{dst=rtp{mux=ts,sdp=rtsp://:555/stream}} :sout-all :sout-keep

Here, you have a sample of a webpage that embeds player (based on VLC plugin).

I had the same issue with npm install. After a lot of search, I found out that removing your .npmrc file or its content (found at %USERPROFILE%/.npmrc), will solve this issue. This worked for me.

If nothing works try Import app folder not the Git root while opening Android Project and Error will be gone

I can't think of a way with the styling, but you could just set the text of the checkbox to nothing, and put a TextView to the left of the checkbox with your desired text.

I created a little example that shows 3 different and simple ways of dealing with threads. I hope it will help you find the right approach to your problem.

import sys
import time

from PyQt5.QtCore import (QCoreApplication, QObject, QRunnable, QThread,
                          QThreadPool, pyqtSignal)


# Subclassing QThread
# http://qt-project.org/doc/latest/qthread.html
class AThread(QThread):

    def run(self):
        count = 0
        while count < 5:
            time.sleep(1)
            print("A Increasing")
            count += 1

# Subclassing QObject and using moveToThread
# http://blog.qt.digia.com/blog/2007/07/05/qthreads-no-longer-abstract
class SomeObject(QObject):

    finished = pyqtSignal()

    def long_running(self):
        count = 0
        while count < 5:
            time.sleep(1)
            print("B Increasing")
            count += 1
        self.finished.emit()

# Using a QRunnable
# http://qt-project.org/doc/latest/qthreadpool.html
# Note that a QRunnable isn't a subclass of QObject and therefore does
# not provide signals and slots.
class Runnable(QRunnable):

    def run(self):
        count = 0
        app = QCoreApplication.instance()
        while count < 5:
            print("C Increasing")
            time.sleep(1)
            count += 1
        app.quit()


def using_q_thread():
    app = QCoreApplication([])
    thread = AThread()
    thread.finished.connect(app.exit)
    thread.start()
    sys.exit(app.exec_())

def using_move_to_thread():
    app = QCoreApplication([])
    objThread = QThread()
    obj = SomeObject()
    obj.moveToThread(objThread)
    obj.finished.connect(objThread.quit)
    objThread.started.connect(obj.long_running)
    objThread.finished.connect(app.exit)
    objThread.start()
    sys.exit(app.exec_())

def using_q_runnable():
    app = QCoreApplication([])
    runnable = Runnable()
    QThreadPool.globalInstance().start(runnable)
    sys.exit(app.exec_())

if __name__ == "__main__":
    #using_q_thread()
    #using_move_to_thread()
    using_q_runnable()

Generally you can achieve the same effect by using normal blocking IO and multiplexing several IO operations using select(2), poll(2) or some other system calls available on your system.

See The C10K problem for the comparison of approaches to scalable IO multiplexing.

Actually the only two strategies you would want to choose are ours if you want to abandon changes brought by branch, but keep the branch in history, and subtree if you are merging independent project into subdirectory of superproject (like 'git-gui' in 'git' repository).

octopus merge is used automatically when merging more than two branches. resolve is here mainly for historical reasons, and for when you are hit by recursive merge strategy corner cases.

For people using Kotlin, inazaruk's answer will not work, the IDE will require the variable to be initialized, so instead of using the postDelayed inside the Runnable, we'll use it in an separate method.

• Initialize your Runnable like this :

  private var myRunnable = Runnable {
      //Do some work
      //Magic happens here ?
      runDelayedHandler(1000)   }
  

• Initialize your runDelayedHandler method like this :

   private fun runDelayedHandler(timeToWait : Long) {
      if (!keepRunning) {
          //Stop your handler
          handler.removeCallbacksAndMessages(null)
          //Do something here, this acts like onHandlerStop
      }
      else {
          //Keep it running
          handler.postDelayed(myRunnable, timeToWait)
      }
  }
  

• As you can see, this approach will make you able to control the lifetime of the task, keeping track of keepRunning and changing it during the lifetime of the application will do the job for you.

Use this command:

egrep -lRZ "\.jpg|\.png|\.gif" . \
    | xargs -0 -l sed -i -e 's/\.jpg\|\.gif\|\.png/.bmp/g'

• egrep: find matching lines using extended regular expressions

  • -l: only list matching filenames

  • -R: search recursively through all given directories

  • -Z: use \0 as record separator

  • "\.jpg|\.png|\.gif": match one of the strings ".jpg", ".gif" or ".png"

  • .: start the search in the current directory

• xargs: execute a command with the stdin as argument

  • -0: use \0 as record separator. This is important to match the -Z of egrep and to avoid being fooled by spaces and newlines in input filenames.

  • -l: use one line per command as parameter

• sed: the stream editor

  • -i: replace the input file with the output without making a backup

  • -e: use the following argument as expression

  • 's/\.jpg\|\.gif\|\.png/.bmp/g': replace all occurrences of the strings ".jpg", ".gif" or ".png" with ".bmp"

Here is the puppet script with all the available puppet log functions.

log_levels.pp

node default {
  notice("try to run this script with -v and -d to see difference between log levels")
  notice("function documentation is available here: http://docs.puppetlabs.com/references/latest/function.html")
  notice("--------------------------------------------------------------------------")

  debug("this is debug. visible only with -d or --debug")
  info("this is info. visible only with -v or --verbose or -d or --debug")
  alert("this is alert. always visible")
  crit("this is crit. always visible")
  emerg("this is emerg. always visible")
  err("this is err. always visible")
  warning("and this is warning. always visible")
  notice("this is notice. always visible")
  #fail will break execution
  fail("this is fail. always visible. fail will break execution process")

}

Script output (on puppet 2.7):

NB: puppet 3.x colours may alter (all the errors will be printed in red)!

The easiest way I did it was this:

Download the Sleep.exe at http://www.sleepcmd.com/. The .exe file should be in the same folder as the program you wrote!

You should use PDO Prepare

From the link:

Calling PDO::prepare() and PDOStatement::execute() for statements that will be issued multiple times with different parameter values optimizes the performance of your application by allowing the driver to negotiate client and/or server side caching of the query plan and meta information, and helps to prevent SQL injection attacks by eliminating the need to manually quote the parameters.

I agree with the sentiment in the comments above — this can be pretty annoying. We can only hope you give the user the option to turn the music off.

However...

audio { display:none;}

<audio autoplay="true" src="https://upload.wikimedia.org/wikipedia/commons/c/c8/Example.ogg">

The css hides the audio element, and the autoplay="true" plays it automatically.

As a side note processes that uses virtual accounts (NT Service\MyService and IIS AppPool\MyAppPool) are still running under the "NETWORK SERVICE" account as this post suggests http://www.adopenstatic.com/cs/blogs/ken/archive/2008/01/29/15759.aspx. The only difference is that these processes are members of the "NT Service\MyService" or "IIS AppPool\MyAppPool" groups (as these are actually groups and not users). This is also the reason why the processes authenticate at the network as the machine the same way NETWORK SERVICE account does.

The way to secure access is not to depend upon this accounts not having NETWORK SERVICE privileges but to grant more permissions specifically to "NT Service\MyService" or "IIS AppPool\MyAppPool" and to remove permissions for "Users" if necessary.

If anyone has more accurate or contradictional information please post.

You would usually use map for that kind of thing.

buttonsListArr = initialArr.map(buttonInfo => (
  <Button ... key={buttonInfo[0]}>{buttonInfo[1]}</Button>
);

(key is a necessary prop whenever you do mapping in React. The key needs to be a unique identifier for the generated component)

As a side, I would use an object instead of an array. I find it looks nicer:

initialArr = [
  {
    id: 1,
    color: "blue",
    text: "text1"
  },
  {
    id: 2,
    color: "red",
    text: "text2"
  },
];

buttonsListArr = initialArr.map(buttonInfo => (
  <Button ... key={buttonInfo.id}>{buttonInfo.text}</Button>
);

A good way is to derive from TcpClient and override the Disposing(bool) method:

class MyClient : TcpClient {
    public bool IsDead { get; set; }
    protected override void Dispose(bool disposing) {
        IsDead = true;
        base.Dispose(disposing);
    }
}

Which won't work if the other code created the instance. Then you'll have to do something desperate like using Reflection to get the value of the private m_CleanedUp member. Or catch the exception.

Frankly, none is this is likely to come to a very good end. You really did want to write to the TCP port. But you won't, that buggy code you can't control is now in control of your code. You've increased the impact of the bug. Talking to the owner of that code and working something out is by far the best solution.

EDIT: A reflection example:

using System.Reflection;
public static bool SocketIsDisposed(Socket s)
{
   BindingFlags bfIsDisposed = BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.GetProperty;
   // Retrieve a FieldInfo instance corresponding to the field
   PropertyInfo field = s.GetType().GetProperty("CleanedUp", bfIsDisposed);
   // Retrieve the value of the field, and cast as necessary
   return (bool)field.GetValue(s, null);
}

Update 2018

Bootstrap 2.x

You could create a new CSS class such as:

.img-center {margin:0 auto;}

And then, add this to each IMG:

 <img src="images/2.png" class="img-responsive img-center">

OR, just override the .img-responsive if you're going to center all images..

 .img-responsive {margin:0 auto;}

Demo: http://bootply.com/86123

Bootstrap 3.x

EDIT - With the release of Bootstrap 3.0.1, the center-block class can now be used without any additional CSS..

 <img src="images/2.png" class="img-responsive center-block">

Bootstrap 4

In Bootstrap 4, the mx-auto class (auto x-axis margins) can be used to center images that are display:block. However, img is display:inline by default so text-center can be used on the parent.

<div class="container">
    <div class="row">
        <div class="col-12">
            <img class="mx-auto d-block" src="//placehold.it/200">  
        </div>
    </div>
    <div class="row">
        <div class="col-12 text-center">
            <img src="//placehold.it/200">  
        </div>
    </div>
</div>

Bootsrap 4 - center image demo

Wrap your OutputStream with a PrintWriter and use the print methods on that class. They take in a String and do the work for you.

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
<html>
    <head>
        <style type="text/css">
            #style_center { position:relative; top:50%; left:50%; }
            #style_center_absolute { position:absolute; top:50px; left:50px; }
            <!--#style_center { position:relative; top:50%; left:50%; height:50px; margin-top:-25px; }-->
        </style>
    </head>

    <body>
        <div style="height:200px; width:200px; background:#00FF00">
            <div id="style_center">+</div>
        </div>
    </body>
</html>

Use FOR XML PATH('') - which is converting the entries to a comma separated string and STUFF() -which is to trim the first comma- as follows Which gives you the same comma separated result

SELECT  STUFF((SELECT  ',' + INSTITUTIONNAME
            FROM EDUCATION EE
            WHERE  EE.STUDENTNUMBER=E.STUDENTNUMBER
            ORDER BY sortOrder
        FOR XML PATH('')), 1, 1, '') AS listStr

FROM EDUCATION E
GROUP BY E.STUDENTNUMBER

Here is the FIDDLE

There are 2 different things.

1. Sort the elements in a set. For which we have SortedSet and similar implementations.
2. Maintain insertion order in a set. For which LinkedHashSet and CopyOnWriteArraySet (thread-safe) can be used.

I was also facing the same issue:

1. I made sure to be connected to mongoDB by running the following on the terminal:

   brew services start [email protected]
   

   And I got the output:

   Successfully started `mongodb-community`
   

Instructions for installing mongodb at
https://docs.mongodb.com/manual/tutorial/install-mongodb-on-os-x/ or https://www.youtube.com/watch?v=IGIcrMTtjoU

2. My configuration was as follows:

   mongoose.connect(config.mongo_uri, {
       useUnifiedTopology: true,
       useNewUrlParser: true})
       .then(() => console.log("Connected to Database"))
       .catch(err => console.error("An error has occured", err));
   

Which solved my problem!

If id is the first key in the array, this'll do:

$ids = array_map('current', $users);

You should not necessarily rely on this though. :)

using (StreamWriter w = File.AppendText("myFile.txt"))
{
  w.WriteLine("hello");
}

Based on IceForge's answer I prepared a reusable solution:

xaml style:

<Style x:Key="ComboBoxSelectOverlay" TargetType="TextBlock">
    <Setter Property="Grid.ZIndex" Value="10"/>
    <Setter Property="Foreground" Value="{x:Static SystemColors.GrayTextBrush}"/>
    <Setter Property="Margin" Value="6,4,10,0"/>
    <Setter Property="IsHitTestVisible" Value="False"/>
    <Setter Property="Visibility" Value="Hidden"/>
    <Style.Triggers>
        <DataTrigger Binding="{Binding}" Value="{x:Null}">
            <Setter Property="Visibility" Value="Visible"/>
        </DataTrigger>
    </Style.Triggers>
</Style>

example of use:

<Grid>
     <ComboBox x:Name="cmb"
               ItemsSource="{Binding Teams}" 
               SelectedItem="{Binding SelectedTeam}"/>
     <TextBlock DataContext="{Binding ElementName=cmb,Path=SelectedItem}"
               Text=" -- Select Team --" 
               Style="{StaticResource ComboBoxSelectOverlay}"/>
</Grid>

A longer but more robust version of the accepted answer:

perl -pe 's;(\\*)(\$([a-zA-Z_][a-zA-Z_0-9]*)|\$\{([a-zA-Z_][a-zA-Z_0-9]*)\})?;substr($1,0,int(length($1)/2)).($2&&length($1)%2?$2:$ENV{$3||$4});eg' template.txt

This expands all instances of $VAR or ${VAR} to their environment values (or, if they're undefined, the empty string).

It properly escapes backslashes, and accepts a backslash-escaped $ to inhibit substitution (unlike envsubst, which, it turns out, doesn't do this).

So, if your environment is:

FOO=bar
BAZ=kenny
TARGET=backslashes
NOPE=engi

and your template is:

Two ${TARGET} walk into a \\$FOO. \\\\
\\\$FOO says, "Delete C:\\Windows\\System32, it's a virus."
$BAZ replies, "\${NOPE}s."

the result would be:

Two backslashes walk into a \bar. \\
\$FOO says, "Delete C:\Windows\System32, it's a virus."
kenny replies, "${NOPE}s."

If you only want to escape backslashes before $ (you could write "C:\Windows\System32" in a template unchanged), use this slightly-modified version:

perl -pe 's;(\\*)(\$([a-zA-Z_][a-zA-Z_0-9]*)|\$\{([a-zA-Z_][a-zA-Z_0-9]*)\});substr($1,0,int(length($1)/2)).(length($1)%2?$2:$ENV{$3||$4});eg' template.txt