There are a number of reasons why the analysis portion of a compiler is normally separated into lexical analysis and parsing ( syntax analysis) phases.

1. Simplicity of design is the most important consideration. The separation of lexical and syntactic analysis often allows us to simplify at least one of these tasks. For example, a parser that had to deal with comments and white space as syntactic units would be. Considerably more complex than one that can assume comments and white space have already been removed by the lexical analyzer. If we are designing a new language, separating lexical and syntactic concerns can lead to a cleaner overall language design.
2. Compiler efficiency is improved. A separate lexical analyzer allows us to apply specialized techniques that serve only the lexical task, not the job of parsing. In addition, specialized buffering techniques for reading input characters can speed up the compiler significantly.
3. Compiler portability is enhanced. Input-device-specific peculiarities can be restricted to the lexical analyzer.

resource___Compilers (2nd Edition) written by- Alfred V. Abo Columbia University Monica S. Lam Stanford University Ravi Sethi Avaya Jeffrey D. Ullman Stanford University

Note: this answer is for ANTLR3! If you're looking for an ANTLR4 example, then this Q&A demonstrates how to create a simple expression parser, and evaluator using ANTLR4.

You first create a grammar. Below is a small grammar that you can use to evaluate expressions that are built using the 4 basic math operators: +, -, * and /. You can also group expressions using parenthesis.

Note that this grammar is just a very basic one: it does not handle unary operators (the minus in: -1+9) or decimals like .99 (without a leading number), to name just two shortcomings. This is just an example you can work on yourself.

Here's the contents of the grammar file Exp.g:

grammar Exp;

/* This will be the entry point of our parser. */
eval
    :    additionExp
    ;

/* Addition and subtraction have the lowest precedence. */
additionExp
    :    multiplyExp 
         ( '+' multiplyExp 
         | '-' multiplyExp
         )* 
    ;

/* Multiplication and division have a higher precedence. */
multiplyExp
    :    atomExp
         ( '*' atomExp 
         | '/' atomExp
         )* 
    ;

/* An expression atom is the smallest part of an expression: a number. Or 
   when we encounter parenthesis, we're making a recursive call back to the
   rule 'additionExp'. As you can see, an 'atomExp' has the highest precedence. */
atomExp
    :    Number
    |    '(' additionExp ')'
    ;

/* A number: can be an integer value, or a decimal value */
Number
    :    ('0'..'9')+ ('.' ('0'..'9')+)?
    ;

/* We're going to ignore all white space characters */
WS  
    :   (' ' | '\t' | '\r'| '\n') {$channel=HIDDEN;}
    ;

(Parser rules start with a lower case letter, and lexer rules start with a capital letter)

After creating the grammar, you'll want to generate a parser and lexer from it. Download the ANTLR jar and store it in the same directory as your grammar file.

Execute the following command on your shell/command prompt:

java -cp antlr-3.2.jar org.antlr.Tool Exp.g

It should not produce any error message, and the files ExpLexer.java, ExpParser.java and Exp.tokens should now be generated.

To see if it all works properly, create this test class:

import org.antlr.runtime.*;

public class ANTLRDemo {
    public static void main(String[] args) throws Exception {
        ANTLRStringStream in = new ANTLRStringStream("12*(5-6)");
        ExpLexer lexer = new ExpLexer(in);
        CommonTokenStream tokens = new CommonTokenStream(lexer);
        ExpParser parser = new ExpParser(tokens);
        parser.eval();
    }
}

and compile it:

// *nix/MacOS
javac -cp .:antlr-3.2.jar ANTLRDemo.java

// Windows
javac -cp .;antlr-3.2.jar ANTLRDemo.java

and then run it:

// *nix/MacOS
java -cp .:antlr-3.2.jar ANTLRDemo

// Windows
java -cp .;antlr-3.2.jar ANTLRDemo

If all goes well, nothing is being printed to the console. This means the parser did not find any error. When you change "12*(5-6)" into "12*(5-6" and then recompile and run it, there should be printed the following:

line 0:-1 mismatched input '<EOF>' expecting ')'

Okay, now we want to add a bit of Java code to the grammar so that the parser actually does something useful. Adding code can be done by placing { and } inside your grammar with some plain Java code inside it.

But first: all parser rules in the grammar file should return a primitive double value. You can do that by adding returns [double value] after each rule:

grammar Exp;

eval returns [double value]
    :    additionExp
    ;

additionExp returns [double value]
    :    multiplyExp 
         ( '+' multiplyExp 
         | '-' multiplyExp
         )* 
    ;

// ...

which needs little explanation: every rule is expected to return a double value. Now to "interact" with the return value double value (which is NOT inside a plain Java code block {...}) from inside a code block, you'll need to add a dollar sign in front of value:

grammar Exp;

/* This will be the entry point of our parser. */
eval returns [double value]                                                  
    :    additionExp { /* plain code block! */ System.out.println("value equals: "+$value); }
    ;

// ...

Here's the grammar but now with the Java code added:

grammar Exp;

eval returns [double value]
    :    exp=additionExp {$value = $exp.value;}
    ;

additionExp returns [double value]
    :    m1=multiplyExp       {$value =  $m1.value;} 
         ( '+' m2=multiplyExp {$value += $m2.value;} 
         | '-' m2=multiplyExp {$value -= $m2.value;}
         )* 
    ;

multiplyExp returns [double value]
    :    a1=atomExp       {$value =  $a1.value;}
         ( '*' a2=atomExp {$value *= $a2.value;} 
         | '/' a2=atomExp {$value /= $a2.value;}
         )* 
    ;

atomExp returns [double value]
    :    n=Number                {$value = Double.parseDouble($n.text);}
    |    '(' exp=additionExp ')' {$value = $exp.value;}
    ;

Number
    :    ('0'..'9')+ ('.' ('0'..'9')+)?
    ;

WS  
    :   (' ' | '\t' | '\r'| '\n') {$channel=HIDDEN;}
    ;

and since our eval rule now returns a double, change your ANTLRDemo.java into this:

import org.antlr.runtime.*;

public class ANTLRDemo {
    public static void main(String[] args) throws Exception {
        ANTLRStringStream in = new ANTLRStringStream("12*(5-6)");
        ExpLexer lexer = new ExpLexer(in);
        CommonTokenStream tokens = new CommonTokenStream(lexer);
        ExpParser parser = new ExpParser(tokens);
        System.out.println(parser.eval()); // print the value
    }
}

Again (re) generate a fresh lexer and parser from your grammar (1), compile all classes (2) and run ANTLRDemo (3):

// *nix/MacOS
java -cp antlr-3.2.jar org.antlr.Tool Exp.g   // 1
javac -cp .:antlr-3.2.jar ANTLRDemo.java      // 2
java -cp .:antlr-3.2.jar ANTLRDemo            // 3

// Windows
java -cp antlr-3.2.jar org.antlr.Tool Exp.g   // 1
javac -cp .;antlr-3.2.jar ANTLRDemo.java      // 2
java -cp .;antlr-3.2.jar ANTLRDemo            // 3

and you'll now see the outcome of the expression 12*(5-6) printed to your console!

Again: this is a very brief explanation. I encourage you to browse the ANTLR wiki and read some tutorials and/or play a bit with what I just posted.

Good luck!

EDIT:

This post shows how to extend the example above so that a Map<String, Double> can be provided that holds variables in the provided expression.

To get this code working with a current version of Antlr (June 2014) I needed to make a few changes. ANTLRStringStream needed to become ANTLRInputStream, the returned value needed to change from parser.eval() to parser.eval().value, and I needed to remove the WS clause at the end, because attribute values such as $channel are no longer allowed to appear in lexer actions.

In C++, Boost Variant implement a safe version of the union, designed to prevent undefined behavior as much as possible.

Its performances are identical to the enum + union construct (stack allocated too etc) but it uses a template list of types instead of the enum :)

It's a long pointer to a constant, wide string (i.e. a string of wide characters).

Since it's a wide string, you want to make your constant look like: L"TestWindow". I wouldn't create the intermediate a either, I'd just pass L"TestWindow" for the parameter:

ghTest = FindWindowEx(NULL, NULL, NULL, L"TestWindow");

If you want to be pedantically correct, an "LPCTSTR" is a "text" string -- a wide string in a Unicode build and a narrow string in an ANSI build, so you should use the appropriate macro:

ghTest = FindWindow(NULL, NULL, NULL, _T("TestWindow"));

Few people care about producing code that can compile for both Unicode and ANSI character sets though, and if you don't getting it to really work correctly can be quite a bit of extra work for little gain. In this particular case, there's not much extra work, but if you're manipulating strings, there's a whole set of string manipulation macros that resolve to the correct functions.

This will give you the deadline :

select id,  
       title,
       created_at + interval '1' day * claim_window as deadline
from projects

Alternatively the function make_interval can be used:

select id,  
       title,
       created_at + make_interval(days => claim_window) as deadline
from projects

To get all projects where the deadline is over, use:

select *
from (
  select id, 
         created_at + interval '1' day * claim_window as deadline
  from projects
) t
where localtimestamp at time zone 'UTC' > deadline

You can do something like this:

SELECT id,name, REPLACE(REPLACE(hide,0,"false"),1,"true") AS hide FROM your-table

Hope this can help you.

Well I was having problems using ICloneable in Silverlight, but I liked the idea of seralization, I can seralize XML, so I did this:

static public class SerializeHelper
{
    //Michael White, Holly Springs Consulting, 2009
    //[email protected]
    public static T DeserializeXML<T>(string xmlData) where T:new()
    {
        if (string.IsNullOrEmpty(xmlData))
            return default(T);

        TextReader tr = new StringReader(xmlData);
        T DocItms = new T();
        XmlSerializer xms = new XmlSerializer(DocItms.GetType());
        DocItms = (T)xms.Deserialize(tr);

        return DocItms == null ? default(T) : DocItms;
    }

    public static string SeralizeObjectToXML<T>(T xmlObject)
    {
        StringBuilder sbTR = new StringBuilder();
        XmlSerializer xmsTR = new XmlSerializer(xmlObject.GetType());
        XmlWriterSettings xwsTR = new XmlWriterSettings();

        XmlWriter xmwTR = XmlWriter.Create(sbTR, xwsTR);
        xmsTR.Serialize(xmwTR,xmlObject);

        return sbTR.ToString();
    }

    public static T CloneObject<T>(T objClone) where T:new()
    {
        string GetString = SerializeHelper.SeralizeObjectToXML<T>(objClone);
        return SerializeHelper.DeserializeXML<T>(GetString);
    }
}

And to add multiple library files you can write as below:

INCLUDEPATH *= E:/DebugLibrary/VTK E:/DebugLibrary/VTK/Common E:/DebugLibrary/VTK/Filtering E:/DebugLibrary/VTK/GenericFiltering E:/DebugLibrary/VTK/Graphics E:/DebugLibrary/VTK/GUISupport/Qt E:/DebugLibrary/VTK/Hybrid E:/DebugLibrary/VTK/Imaging E:/DebugLibrary/VTK/IO E:/DebugLibrary/VTK/Parallel E:/DebugLibrary/VTK/Rendering E:/DebugLibrary/VTK/Utilities E:/DebugLibrary/VTK/VolumeRendering E:/DebugLibrary/VTK/Widgets E:/DebugLibrary/VTK/Wrapping

LIBS *= -LE:/DebugLibrary/VTKBin/bin/release -lvtkCommon -lvtksys -lQVTK -lvtkWidgets -lvtkRendering -lvtkGraphics -lvtkImaging -lvtkIO -lvtkFiltering -lvtkDICOMParser -lvtkpng -lvtktiff -lvtkzlib -lvtkjpeg -lvtkexpat -lvtkNetCDF -lvtkexoIIc -lvtkftgl -lvtkfreetype -lvtkHybrid -lvtkVolumeRendering -lQVTKWidgetPlugin -lvtkGenericFiltering

For those who get this (terribly unclear) error:

COPY failed: stat /var/lib/docker/tmp/docker-builderXXXXXXX/abc.txt: no such file or directory

There could be loads of reasons, including:

• For docker-compose users, remember that the docker-compose.yml context overwrites the context of the Dockerfile. Your COPY statements now need to navigate a path relative to what is defined in docker-compose.yml instead of relative to your Dockerfile.
• Trailing comments or a semicolon on the COPY line: COPY abc.txt /app #This won't work
• The file is in a directory ignored by .dockerignore or .gitignore files (be wary of wildcards)
• You made a typo

Sometimes WORKDIR /abc followed by COPY . xyz/ works where COPY /abc xyz/ fails, but it's a bit ugly.

I was also running the same problem when I updated to xcode 5 it removed older sdk. But I taken the copy of older SDK from another computer and the same you can download from following link.

http://www.4shared.com/zip/NlPgsxz6/iPhoneOS61sdk.html
(www.4shared.com test account [email protected]/test)

There are 2 ways to work with.

1) Unzip and paste this folder to /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs & restart the xcode.

But this might again removed by Xcode if you update xcode.

2) Another way is Unzip and paste where you want and go to /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs and create a symbolic link here, so that the SDK will remain same even if you update the Xcode.

Another change I made, Build Setting > Architectures > standard (not 64) so list all the versions of Deployment Target

No need to download the zip if you only wanted to change the deployment target.

Here are some screenshots.

For Microsoft SQL Server you can return the @@ROWCOUNT variable to return the number of rows affected by the last statement in the stored procedure.

Here is the missing example

library(rjson)
url <- 'http://someurl/data.json'
document <- fromJSON(file=url, method='C')

In my case I found this error happening in our teams build server. The tests worked on our local dev machines.

The problem was that the target website was not configured correctly on the build server, so it couldn't open the browser correctly.

We were using the chrome driver but I'm not sure that makes a difference.

Use a empty placeholder on your html like:

<select class="select2" placeholder = "">
    <option value="1">red</option>
    <option value="2">blue</option>
</select>

and in your script use:

$(".select2").select2({
        placeholder: "Select a color",
        allowClear: true
    });

A little late to the party, but NodeJS (as of ~Nov 14 I guess) supports corporate NPM repositories - you can find out more on their official site.

From a cursory glance it would appear that npmE allows fall-through mirroring of the NPM repository - that is, it will look up packages in the real NPM repository if it can't find one on your internal one. Seems very useful!

npm Enterprise is an on-premises solution for securely sharing and distributing JavaScript modules within your organization, from the team that maintains npm and the public npm registry. It's designed for teams that need:

easy internal sharing of private modules better control of development and deployment workflow stricter security around deploying open-source modules compliance with legal requirements to host code on-premises npmE is private npm

npmE is an npm registry that works with the same standard npm client you already use, but provides the features needed by larger organizations who are now enthusiastically adopting node. It's built by npm, Inc., the sponsor of the npm open source project and the host of the public npm registry.

Unfortunately, it's not free. You can get a trial, but it is commerical software. This is the not so great bit for solo developers, but if you're a solo developer, you have GitHub :-)

I had a similar issue with my MEAN app. In my case, the issue was happening in only one get request. I tried with removing adblock, tried clearing cache and tried with different browsers. Nothing helped.

finally, I have figured out that the api was trying to return a huge JSON object. When I have tried to send a small object, it was working fine. Finally, I have changed my implementation to return a buffer instead of a JSON.

I wish expressJS to throw an error in this case.

You can add a div with runat="server" to the page:

<div runat="server" id="myDiv">
</div>

and then set its InnerHtml property from the code-behind:

myDiv.InnerHtml = "your html here";

If you want to modify the DIV's contents on the client side, then you can use javascript code similar to this:

<script type="text/javascript">
    Sys.Application.add_load(MyLoad);
    function MyLoad(sender) {
        $get('<%= div.ClientID %>').innerHTML += " - text added on client";
    }
</script>

Liam's link looks great, but also check out pandas.Timedelta - looks like it plays nicely with NumPy's and Python's time deltas.

https://pandas.pydata.org/pandas-docs/stable/timedeltas.html

pd.date_range('2014-01-01', periods=10) + pd.Timedelta(days=1)

0xe0434352 is the SEH code for a CLR exception. If you don't understand what that means, stop and read A Crash Course on the Depths of Win32™ Structured Exception Handling. So your process is not handling a CLR exception. Don't shoot the messenger, KERNELBASE.DLL is just the unfortunate victim. The perpetrator is MyApp.exe.

There should be a minidump of the crash in DrWatson folders with a full stack, it will contain everything you need to root cause the issue.

I suggest you wire up, in your myapp.exe code, AppDomain.UnhandledException and Application.ThreadException, as appropriate.

Do I really need to set this for doing a simple git pull origin master every time I update an app server? Is there anyway to override this behavior so it doesn't error out when name and email are not set?

It will ask just once and make sure that the rsa public key for this machine is added over your github account to which you are trying to commit or passing a pull request.

More information on this can be found: Here

You can create an Answer in Mockito. Let's assume, we have an interface named Application with a method myFunction.

public interface Application {
  public String myFunction(String abc);
}

Here is the test method with a Mockito answer:

public void testMyFunction() throws Exception {
  Application mock = mock(Application.class);
  when(mock.myFunction(anyString())).thenAnswer(new Answer<String>() {
    @Override
    public String answer(InvocationOnMock invocation) throws Throwable {
      Object[] args = invocation.getArguments();
      return (String) args[0];
    }
  });

  assertEquals("someString",mock.myFunction("someString"));
  assertEquals("anotherString",mock.myFunction("anotherString"));
}

Since Mockito 1.9.5 and Java 8, you can also use a lambda expression:

when(myMock.myFunction(anyString())).thenAnswer(i -> i.getArguments()[0]);

check this form validation extension library can help you to validate files, with current form validation when you validate upload field it treat as input filed where value is empty have look on this really good extension for form validation library

MY_Formvalidation

#include <iostream>
#include <fstream>
using namespace std;

int main () {
  ofstream file;
  file.open ("codebind.txt");
  file << "Please writr this text to a file.\n this text is written using C++\n";
  file.close();
  return 0;
}

Try Like this..

Define your class with ''

<ol class="breadcrumb">
    <li *ngClass="{'active': step==='step1'}" (click)="step='step1; '">Step1</li>
    <li *ngClass="{'active': step==='step2'}"  (click)="step='step2'">Step2</li>
    <li *ngClass="{'active': step==='step3'}" (click)="step='step3'">Step3</li>
</ol>

Just copy paste below code!

This will print your current taxonomy name and description(optional)

<?php 
   $tax = $wp_query->get_queried_object();
   echo ''. $tax->name . '';
   echo "<br>";
   echo ''. $tax->description .''; 
?>

By using this query you can see all open transactions.

List All:

SHOW FULL PROCESSLIST  

if you want to kill a hang transaction copy transaction id and kill transaction by using this command:

KILL <id>    // e.g KILL 16543

this should work, although there might be more elegant ways.

import re
url='<a href="http://www.ptop.se" target="_blank">http://www.ptop.se</a>'
r = re.compile('(?<=href=").*?(?=")')
r.findall(url)

Another late answer:

If you are trying to make a hot copy of server database (in a linux environment) and the database engine of all tables is MyISAM you should use mysqlhotcopy.

Acordingly to documentation:

It uses FLUSH TABLES, LOCK TABLES, and cp or scp to make a database backup. It is a fast way to make a backup of the database or single tables, but it can be run only on the same machine where the database directories are located. mysqlhotcopy works only for backing up MyISAM and ARCHIVE tables.

The LOCK TABLES time depends of the time the server can copy MySQL files (it doesn't make a dump).

Below is the PHP code I use in my project when sending Microsoft Excel to user:

  /**
   * Export an array as downladable Excel CSV
   * @param array   $header
   * @param array   $data
   * @param string  $filename
   */
  function toCSV($header, $data, $filename) {
    $sep  = "\t";
    $eol  = "\n";
    $csv  =  count($header) ? '"'. implode('"'.$sep.'"', $header).'"'.$eol : '';
    foreach($data as $line) {
      $csv .= '"'. implode('"'.$sep.'"', $line).'"'.$eol;
    }
    $encoded_csv = mb_convert_encoding($csv, 'UTF-16LE', 'UTF-8');
    header('Content-Description: File Transfer');
    header('Content-Type: application/vnd.ms-excel');
    header('Content-Disposition: attachment; filename="'.$filename.'.csv"');
    header('Content-Transfer-Encoding: binary');
    header('Expires: 0');
    header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
    header('Pragma: public');
    header('Content-Length: '. strlen($encoded_csv));
    echo chr(255) . chr(254) . $encoded_csv;
    exit;
  }

UPDATED: Filename improvement and BUG fix correct length calculation. Thanks to TRiG and @ivanhoe011

p {
    float: left;
    margin: 0;
}

No spacing will be around, it looks similar to span.

From GNU Make error appendix, as you see this is not a Make error but an error coming from gcc.

‘[foo] Error NN’ ‘[foo] signal description’ These errors are not really make errors at all. They mean that a program that make invoked as part of a recipe returned a non-0 error code (‘Error NN’), which make interprets as failure, or it exited in some other abnormal fashion (with a signal of some type). See Errors in Recipes. If no *** is attached to the message, then the subprocess failed but the rule in the makefile was prefixed with the - special character, so make ignored the error.

So in order to attack the problem, the error message from gcc is required. Paste the command in the Makefile directly to the command line and see what gcc says. For more details on Make errors click here.

Unlike others I think there are many reasons why you might always want the latest version. Particularly if you are doing continuous deployment (we sometimes have like 5 releases in a day) and don't want to do a multi-module project.

What I do is make Hudson/Jenkins do the following for every build:

mvn clean versions:use-latest-versions scm:checkin deploy -Dmessage="update versions" -DperformRelease=true

That is I use the versions plugin and scm plugin to update the dependencies and then check it in to source control. Yes I let my CI do SCM checkins (which you have to do anyway for the maven release plugin).

You'll want to setup the versions plugin to only update what you want:

<plugin>
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>versions-maven-plugin</artifactId>
    <version>1.2</version>
    <configuration>
        <includesList>com.snaphop</includesList>
        <generateBackupPoms>false</generateBackupPoms>
        <allowSnapshots>true</allowSnapshots>
    </configuration>
</plugin>

I use the release plugin to do the release which takes care of -SNAPSHOT and validates that there is a release version of -SNAPSHOT (which is important).

If you do what I do you will get the latest version for all snapshot builds and the latest release version for release builds. Your builds will also be reproducible.

Update

I noticed some comments asking some specifics of this workflow. I will say we don't use this method anymore and the big reason why is the maven versions plugin is buggy and in general is inherently flawed.

It is flawed because to run the versions plugin to adjust versions all the existing versions need to exist for the pom to run correctly. That is the versions plugin cannot update to the latest version of anything if it can't find the version referenced in the pom. This is actually rather annoying as we often cleanup old versions for disk space reasons.

Really you need a separate tool from maven to adjust the versions (so you don't depend on the pom file to run correctly). I have written such a tool in the the lowly language that is Bash. The script will update the versions like the version plugin and check the pom back into source control. It also runs like 100x faster than the mvn versions plugin. Unfortunately it isn't written in a manner for public usage but if people are interested I could make it so and put it in a gist or github.

Going back to workflow as some comments asked about that this is what we do:

1. We have 20 or so projects in their own repositories with their own jenkins jobs
2. When we release the maven release plugin is used. The workflow of that is covered in the plugin's documentation. The maven release plugin sort of sucks (and I'm being kind) but it does work. One day we plan on replacing this method with something more optimal.
3. When one of the projects gets released jenkins then runs a special job we will call the update all versions job (how jenkins knows its a release is a complicated manner in part because the maven jenkins release plugin is pretty crappy as well).
4. The update all versions job knows about all the 20 projects. It is actually an aggregator pom to be specific with all the projects in the modules section in dependency order. Jenkins runs our magic groovy/bash foo that will pull all the projects update the versions to the latest and then checkin the poms (again done in dependency order based on the modules section).
5. For each project if the pom has changed (because of a version change in some dependency) it is checked in and then we immediately ping jenkins to run the corresponding job for that project (this is to preserve build dependency order otherwise you are at the mercy of the SCM Poll scheduler).

At this point I'm of the opinion it is a good thing to have the release and auto version a separate tool from your general build anyway.

Now you might think maven sort of sucks because of the problems listed above but this actually would be fairly difficult with a build tool that does not have a declarative easy to parse extendable syntax (aka XML).

In fact we add custom XML attributes through namespaces to help hint bash/groovy scripts (e.g. don't update this version).

I was working in Wildfly but I was using

org.hibernate.Session session = ((org.hibernate.ejb.EntityManagerImpl) em.getDelegate()).getSession();

and the correct was

org.hibernate.Session session = (Session) manager.getDelegate();

First try to see what's wrong with the pod:

kubectl logs -p <your_pod>

In my case it was a problem with the YAML file.

So, I needed to correct the configuration file and replace it:

kubectl replace --force -f <yml_file_describing_pod>

Of course AJAX is the solution,

To perform an AJAX request (for easiness we can use jQuery library).

Step1.

Include jQuery library in your web page

a. you can download jQuery library from jquery.com and keep it locally.

b. or simply paste the following code,

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>

Step 2.

Call a javascript function on button click

<button type="button" onclick="foo()">Click Me</button>

Step 3.

and finally the function

 function foo () {
      $.ajax({
        url:"test.php", //the page containing php script
        type: "POST", //request type
        success:function(result){
         alert(result);
       }
     });
 }

it will make an AJAX request to test.php when ever you clicks the button and alert the response.

For example your code in test.php is,

<?php echo 'hello'; ?>

then it will alert "hello" when ever you clicks the button.

My activity calls finish() (which doesn't make it finish immediately, but will do eventually) and calls Google Street Viewer. When I debug it on Eclipse, my connection to the app breaks when Street Viewer is called, which I understand as the (whole) application being closed, supposedly to free up memory (as a single activity being finished shouldn't cause this behavior). Nevertheless, I'm able to save state in a Bundle via onSaveInstanceState() and restore it in the onCreate() method of the next activity in the stack. Either by using a static singleton or subclassing Application I face the application closing and losing state (unless I save it in a Bundle). So from my experience they are the same with regards to state preservation. I noticed that the connection is lost in Android 4.1.2 and 4.2.2 but not on 4.0.7 or 3.2.4, which in my understanding suggests that the memory recovery mechanism has changed at some point.

A very lean solution based on Scanner:

Scanner scanner = new Scanner( new File("poem.txt") );
String text = scanner.useDelimiter("\\A").next();
scanner.close(); // Put this call in a finally block

Or, if you want to set the charset:

Scanner scanner = new Scanner( new File("poem.txt"), "UTF-8" );
String text = scanner.useDelimiter("\\A").next();
scanner.close(); // Put this call in a finally block

Or, with a try-with-resources block, which will call scanner.close() for you:

try (Scanner scanner = new Scanner( new File("poem.txt"), "UTF-8" )) {
    String text = scanner.useDelimiter("\\A").next();
}

Remember that the Scanner constructor can throw an IOException. And don't forget to import java.io and java.util.

Source: Pat Niemeyer's blog

You can try this from the console:

adb logcat --buffer=crash 

More info on this option:

adb logcat --help

...

  -b <buffer>, --buffer=<buffer>         Request alternate ring buffer, 'main',
                  'system', 'radio', 'events', 'crash', 'default' or 'all'.
                  Multiple -b parameters or comma separated list of buffers are
                  allowed. Buffers interleaved. Default -b main,system,crash.

Use maxlength

<input type="text" maxlength="10" />

I don't want to include the Support library just for getColor, so I'm using something like

public static int getColorWrapper(Context context, int id) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        return context.getColor(id);
    } else {
        //noinspection deprecation
        return context.getResources().getColor(id);
    }
}

I guess the code should work just fine, and the deprecated getColor cannot disappear from API < 23.

And this is what I'm using in Kotlin:

/**
 * Returns a color associated with a particular resource ID.
 *
 * Wrapper around the deprecated [Resources.getColor][android.content.res.Resources.getColor].
 */
@Suppress("DEPRECATION")
@ColorInt
fun getColorHelper(context: Context, @ColorRes id: Int) =
    if (Build.VERSION.SDK_INT >= 23) context.getColor(id) else context.resources.getColor(id);

Try to use anyMatch of Lambda Expression. It is much better approach.

 boolean idExists = tabPane.getTabs().stream()
            .anyMatch(t -> t.getId().equals(idToCheck));

You need to animate the html, body

DEMO http://jsfiddle.net/kevinPHPkevin/8tLdq/1/

$("#button").click(function() {
    $('html, body').animate({
        scrollTop: $("#myDiv").offset().top
    }, 2000);
});

same happened to me today as described by Vidar.

I have a Build error in a Helper Library (which is referenced by other projects) and instead of telling me that there's an error in Helper Library, the compiler comes up with list of MetaFile-not-found type errors. After correcting the Build error in Helper Library, the MetaFile errors gone.

Is there any setting in VS to improve this?

    int  pos  = 0;
    yourSeekBar.setMax(mPlayer.getDuration());

After You start Your MediaPlayer i.e mplayer.start()

Try this code

while(mPlayer!=null){
         try {
                Thread.sleep(1000);
                pos  = mPlayer.getCurrentPosition();
            }  catch (Exception e) {
                //show exception in LogCat
            }
            yourSeekBar.setProgress(pos);

   }

Before you added this code you have to create xml resource for SeekBar and use it in Your Activity class of ur onCreate() method.

The fix for the heartbleed vulnerability has been backported to 1.0.1e-16 by Red Hat for Enterprise Linux see, and this is therefore the official fix that CentOS ships.

Replacing OpenSSL with the latest version from upstream (i.e. 1.0.1g) runs the risk of introducing functionality changes which may break compatibility with applications/clients in unpredictable ways, causes your system to diverge from RHEL, and puts you on the hook for personally maintaining future updates to that package. By replacing openssl using a simple make config && make && make install means that you also lose the ability to use rpm to manage that package and perform queries on it (e.g. verifying all the files are present and haven't been modified or had permissions changed without also updating the RPM database).

I'd also caution that crypto software can be extremely sensitive to seemingly minor things like compiler options, and if you don't know what you're doing, you could introduce vulnerabilities in your local installation.

I have also been through this problem,

First i tried setting my password of root to blank using command :

SET PASSWORD FOR root@localhost=PASSWORD('');

But don't be happy , PHPMYADMIN uses 127.0.0.1 not localhost , i know you would say both are same but that is not the case , use the command mentioned underneath and you are done.

SET PASSWORD FOR [email protected]=PASSWORD('');

Just replace localhost with 127.0.0.1 and you are done .

The accepted answer didn't work in my situation, not sure why. I switched from JRE1.7 to JRE1.8 and that resolved the issue automatically. JRE1.8 uses TLS1.2 by default

I'd use something like:

dim customer = (from c in xmldoc...<Customer> 
                where c.<ID>.Value=22 
                select c).SingleOrDefault 

Edit:

missed the c# tag, sorry......the example is in VB.NET

DBCC OPENTRAN helps to identify active transactions that may be preventing log truncation. DBCC OPENTRAN displays information about the oldest active transaction and the oldest distributed and nondistributed replicated transactions, if any, within the transaction log of the specified database. Results are displayed only if there is an active transaction that exists in the log or if the database contains replication information.

An informational message is displayed if there are no active transactions in the log.

DBCC OPENTRAN

system "sleep 0.1";

does the trick.

As a workaround, I've been using this:

# Fix Python 2.x.
try:
    UNICODE_EXISTS = bool(type(unicode))
except NameError:
    unicode = lambda s: str(s)

The techniques "eval()" and "JSON.parse()" use mutually exclusive formats.

• With "eval()" parenthesis are required.
• With "JSON.parse()" parenthesis are forbidden.

Beware, there are "stringify()" functions that produce "eval" format. For ajax, you should use only the JSON format.

While "eval" incorporates the entire JavaScript language, JSON uses only a tiny subset of the language. Among the constructs in the JavaScript language that "eval" must recognize is the "Block statement" (a.k.a. "compound statement"); which is a pair or curly braces "{}" with some statements inside. But curly braces are also used in the syntax of object literals. The interpretation is differentiated by the context in which the code appears. Something might look like an object literal to you, but "eval" will see it as a compound statement.

In the JavaScript language, object literals occur to the right of an assignment.

var myObj = { ...some..code..here... };

Object literals don't occur on their own.

{ ...some..code..here... }   // this looks like a compound statement

Going back to the OP's original question, asked in 2008, he inquired why the following fails in "eval()":

{ title: "One", key: "1" }

The answer is that it looks like a compound statement. To convert it into an object, you must put it into a context where a compound statement is impossible. That is done by putting parenthesis around it

( { title: "One", key: "1" } )    // not a compound statment, so must be object literal

The OP also asked why a similar statement did successfully eval:

[ { title: "One", key: "1" }, { title: "Two", key: "2" } ]

The same answer applies -- the curly braces are in a context where a compound statement is impossible. This is an array context, "[...]", and arrays can contain objects, but they cannot contain statements.

Unlike "eval()", JSON is very limited in its capabilities. The limitation is intentional. The designer of JSON intended a minimalist subset of JavaScript, using only syntax that could appear on the right hand side of an assignment. So if you have some code that correctly parses in JSON...

var myVar = JSON.parse("...some...code...here...");

...that implies it will also legally parse on the right hand side of an assignment, like this..

var myVar = ...some..code..here... ;

But that is not the only restriction on JSON. The BNF language specification for JSON is very simple. For example, it does not allow for the use of single quotes to indicate strings (like JavaScript and Perl do) and it does not have a way to express a single character as a byte (like 'C' does). Unfortunately, it also does not allow comments (which would be really nice when creating configuration files). The upside of all those limitations is that parsing JSON is fast and offers no opportunity for code injection (a security threat).

Because of these limitations, JSON has no use for parenthesis. Consequently, a parenthesis in a JSON string is an illegal character.

Always use JSON format with ajax, for the following reasons:

• A typical ajax pipeline will be configured for JSON.
• The use of "eval()" will be criticised as a security risk.

As an example of an ajax pipeline, consider a program that involves a Node server and a jQuery client. The client program uses a jQuery call having the form $.ajax({dataType:'json',...etc.});. JQuery creates a jqXHR object for later use, then packages and sends the associated request. The server accepts the request, processes it, and then is ready to respond. The server program will call the method res.json(data) to package and send the response. Back at the client side, jQuery accepts the response, consults the associated jqXHR object, and processes the JSON formatted data. This all works without any need for manual data conversion. The response involves no explicit call to JSON.stringify() on the Node server, and no explicit call to JSON.parse() on the client; that's all handled for you.

The use of "eval" is associated with code injection security risks. You might think there is no way that can happen, but hackers can get quite creative. Also, "eval" is problematic for Javascript optimization.

If you do find yourself using a using a "stringify()" function, be aware that some functions with that name will create strings that are compatible with "eval" and not with JSON. For example, in Node, the following gives you function that creates strings in "eval" compatible format:

var stringify = require('node-stringify'); // generates eval() format

This can be useful, but unless you have a specific need, it's probably not what you want.

Download commons-net binary from here. Extract the files and reference the commons-net-x.x.jar file.

Please try this ... hope it helps

JSONObject jsonObj1=null;
JSONObject jsonObj2=null;
JSONArray array=new JSONArray();
JSONArray array2=new JSONArray();

jsonObj1=new JSONObject();
jsonObj2=new JSONObject();


array.put(new JSONObject().put("firstName", "John").put("lastName","Doe"))
.put(new JSONObject().put("firstName", "Anna").put("v", "Smith"))
.put(new JSONObject().put("firstName", "Peter").put("v", "Jones"));

array2.put(new JSONObject().put("firstName", "John").put("lastName","Doe"))
.put(new JSONObject().put("firstName", "Anna").put("v", "Smith"))
.put(new JSONObject().put("firstName", "Peter").put("v", "Jones"));

jsonObj1.put("employees", array);
jsonObj1.put("manager", array2);

Response response = null;
response = Response.status(Status.OK).entity(jsonObj1.toString()).build();
return response;

The Error is here

lastrow = wsPOR.Range("A" & Rows.Count).End(xlUp).Row + 1

wsPOR is a workbook and not a worksheet. If you are working with "Sheet1" of that workbook then try this

lastrow = wsPOR.Sheets("Sheet1").Range("A" & _
          wsPOR.Sheets("Sheet1").Rows.Count).End(xlUp).Row + 1

Similarly

wsPOR.Range("A2:G" & lastrow).Select

should be

wsPOR.Sheets("Sheet1").Range("A2:G" & lastrow).Select

I just recently needed to do this for two separate repositories that share a common history. I started with:

• Org/repository1 master
• Org/repository2 master

I wanted all the changes from repository2 master to be applied to repository1 master, accepting all changes that repository2 would make. In git's terms, this should be a strategy called -s theirs BUT it does not exist. Be careful because -X theirs is named like it would be what you want, but it is NOT the same (it even says so in the man page).

The way I solved this was to go to repository2 and make a new branch repo1-merge. In that branch, I ran git pull [email protected]:Org/repository1 -s ours and it merges fine with no issues. I then push it to the remote.

Then I go back to repository1 and make a new branch repo2-merge. In that branch, I run git pull [email protected]:Org/repository2 repo1-merge which will complete with issues.

Finally, you would either need to issue a merge request in repository1 to make it the new master, or just keep it as a branch.

I used %matplotlib inline in the first cell of the notebook and it works. I think you should try:

%matplotlib inline

import matplotlib
import numpy as np
import matplotlib.pyplot as plt

You can also always start all your IPython kernels in inline mode by default by setting the following config options in your config files:

c.IPKernelApp.matplotlib=<CaselessStrEnum>
  Default: None
  Choices: ['auto', 'gtk', 'gtk3', 'inline', 'nbagg', 'notebook', 'osx', 'qt', 'qt4', 'qt5', 'tk', 'wx']
  Configure matplotlib for interactive use with the default matplotlib backend.

Sharding does more than just horizontal partitioning. According to the wikipedia article,

Horizontal partitioning splits one or more tables by row, usually within a single instance of a schema and a database server. It may offer an advantage by reducing index size (and thus search effort) provided that there is some obvious, robust, implicit way to identify in which partition a particular row will be found, without first needing to search the index, e.g., the classic example of the 'CustomersEast' and 'CustomersWest' tables, where their zip code already indicates where they will be found.

Sharding goes beyond this: it partitions the problematic table(s) in the same way, but it does this across potentially multiple instances of the schema. The obvious advantage would be that search load for the large partitioned table can now be split across multiple servers (logical or physical), not just multiple indexes on the same logical server.

Also,

Splitting shards across multiple isolated instances requires more than simple horizontal partitioning. The hoped-for gains in efficiency would be lost, if querying the database required both instances to be queried, just to retrieve a simple dimension table. Beyond partitioning, sharding thus splits large partitionable tables across the servers, while smaller tables are replicated as complete units

Try onclick function separately it can give you access to execute your function which can be used to open up a new window, for this purpose you first need to create a javascript function there you can define it and in your anchor tag you just need to call your function.

Example:

function newwin() {              
 myWindow=window.open('lead_data.php?leadid=1','myWin','width=400,height=650')
}

See how to call it from your anchor tag

<a onclick='newwin()'>Anchor</a>

Update

Visit this jsbin

http://jsbin.com/icUTUjI/1/edit

May be this will help you a lot to understand your problem.

There's no way around it except to store it. Memory paging should reduce potential issues there.

I would suggest instead of using a global variable called 'xml', do something more like this:

var dataStore = (function(){
    var xml;

    $.ajax({
      type: "GET",
      url: "test.xml",
      dataType: "xml",
      success : function(data) {
                    xml = data;
                }
    });

    return {getXml : function()
    {
        if (xml) return xml;
        // else show some error that it isn't loaded yet;
    }};
})();

then access it with:

$(dataStore.getXml()).find('something').attr('somethingElse');

white-space: initial; Works for me.

I found this question as the top result while Googling how to find the owner of a table in Oracle, so I thought that I would contribute a table specific answer for others' convenience.

To find the owner of a specific table in an Oracle DB, use the following query:

select owner from ALL_TABLES where TABLE_NAME ='<MY-TABLE-NAME>';

This will work although when embedding PHP in HTML it is better practice to use the following form:

<table>
    <?php foreach($array as $key=>$value): ?>
    <tr>
        <td><?= $key; ?></td>
    </tr>
    <?php endforeach; ?>
</table>

You can find the doc for the alternative syntax on PHP.net

Python 3

import openpyxl as xl

wb = xl.load_workbook("Sample.xlsx", enumerate)

#the 2 lines under do the same. 
sheet = wb.get_sheet_by_name('sheet') 
sheet = wb.worksheets[0]

row_count = sheet.max_row
column_count = sheet.max_column

#this works fore me.

Aside from the Documents folder, iOS also lets you save files to the temp and Library folders.

For more information on which one to use, see this link from the documentation:

• “Where You Should Put Your App’s Files.”

Update: Xpath version of *[@class~='my-class'] css selector

So after my comment below in response to hakre's comment, I got curious and looked into the code behind Zend_Dom_Query. It looks like the above selector is compiled to the following xpath (untested):

[contains(concat(' ', normalize-space(@class), ' '), ' my-class ')]

So the PHP would be:

$dom = new DomDocument();
$dom->load($filePath);
$finder = new DomXPath($dom);
$classname="my-class";
$nodes = $finder->query("//*[contains(concat(' ', normalize-space(@class), ' '), ' $classname ')]");

Basically, all we do here is normalize the class attribute so that even a single class is bounded by spaces, and the complete class list is bounded in spaces. Then append the class we are searching for with a space. This way we are effectively looking for and find only instances of my-class .

Use an xpath selector?

$dom = new DomDocument();
$dom->load($filePath);
$finder = new DomXPath($dom);
$classname="my-class";
$nodes = $finder->query("//*[contains(@class, '$classname')]");

If it is only ever one type of element you can replace the * with the particular tagname.

If you need to do a lot of this with very complex selector I would recommend Zend_Dom_Query which supports CSS selector syntax (a la jQuery):

$finder = new Zend_Dom_Query($html);
$classname = 'my-class';
$nodes = $finder->query("*[class~=\"$classname\"]");

I have solved this, eventually!

I re-installed Ruby and Rails under RVM. I'm using Ruby version 1.9.2-p136.

After re-installing under rvm, this error was still present.

In the end the magic command that solved it was:

sudo install_name_tool -change libmysqlclient.16.dylib /usr/local/mysql/lib/libmysqlclient.16.dylib ~/.rvm/gems/ruby-1.9.2-p136/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle

Hope this helps someone else!

You could try:

<html>
    <head>
        <style>
            #main {
                width: 500; /*Set to whatever*/
                height: 500;/*Set to whatever*/
            }
        </style>
    </head>
    <body id="main">
    </body>
</html>

working for me after turn off ads block extension in chrome, this error sometime appear because something that block http in browser

Use "&" instead of "&".

The question isn't asking about ignoring all subdirectories, but I couldn't find the answer anywhere, so I'll post it: */*.

var data = {_x000D_
  "items": [{_x000D_
    "id": 1,_x000D_
    "category": "cat1"_x000D_
  }, {_x000D_
    "id": 2,_x000D_
    "category": "cat2"_x000D_
  }, {_x000D_
    "id": 3,_x000D_
    "category": "cat1"_x000D_
  }, {_x000D_
    "id": 4,_x000D_
    "category": "cat2"_x000D_
  }, {_x000D_
    "id": 5,_x000D_
    "category": "cat1"_x000D_
  }]_x000D_
};_x000D_
//Filters an array of numbers to include only numbers bigger then zero._x000D_
//Exact Data you want..._x000D_
var returnedData = $.grep(data.items, function(element) {_x000D_
  return element.category === "cat1" && element.id === 3;_x000D_
}, false);_x000D_
console.log(returnedData);_x000D_
$('#id').text('Id is:-' + returnedData[0].id)_x000D_
$('#category').text('Category is:-' + returnedData[0].category)_x000D_
//Filter an array of numbers to include numbers that are not bigger than zero._x000D_
//Exact Data you don't want..._x000D_
var returnedOppositeData = $.grep(data.items, function(element) {_x000D_
  return element.category === "cat1";_x000D_
}, true);_x000D_
console.log(returnedOppositeData);

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>_x000D_
<p id='id'></p>_x000D_
<p id='category'></p>

The $.grep() method eliminates items from an array as necessary so that only remaining items carry a given search. The test is a function that is passed an array item and the index of the item within the array. Only if the test returns true will the item be in the result array.

Why not one more answer? setState() and the setState()-triggered render() have both completed executing when you call componentDidMount() (the first time render() is executed) and/or componentDidUpdate() (any time after render() is executed). (Links are to ReactJS.org docs.)

Example with componentDidUpdate()

Caller, set reference and set state...

<Cmp ref={(inst) => {this.parent=inst}}>;
this.parent.setState({'data':'hello!'});

Render parent...

componentDidMount() {           // componentDidMount() gets called after first state set
    console.log(this.state.data);   // output: "hello!"
}
componentDidUpdate() {          // componentDidUpdate() gets called after all other states set
    console.log(this.state.data);   // output: "hello!"
}

Example with componentDidMount()

Caller, set reference and set state...

<Cmp ref={(inst) => {this.parent=inst}}>
this.parent.setState({'data':'hello!'});

Render parent...

render() {              // render() gets called anytime setState() is called
    return (
        <ChildComponent
            state={this.state}
        />
    );
}

After parent rerenders child, see state in componentDidUpdate().

componentDidMount() {           // componentDidMount() gets called anytime setState()/render() finish
console.log(this.props.state.data); // output: "hello!"
}

requests supports so called event hooks (as of 2.23 there's actually only response hook). The hook can be used on a request to print full request-response pair's data, including effective URL, headers and bodies, like:

import textwrap
import requests

def print_roundtrip(response, *args, **kwargs):
    format_headers = lambda d: '\n'.join(f'{k}: {v}' for k, v in d.items())
    print(textwrap.dedent('''
        ---------------- request ----------------
        {req.method} {req.url}
        {reqhdrs}

        {req.body}
        ---------------- response ----------------
        {res.status_code} {res.reason} {res.url}
        {reshdrs}

        {res.text}
    ''').format(
        req=response.request, 
        res=response, 
        reqhdrs=format_headers(response.request.headers), 
        reshdrs=format_headers(response.headers), 
    ))

requests.get('https://httpbin.org/', hooks={'response': print_roundtrip})

Running it prints:

---------------- request ----------------
GET https://httpbin.org/
User-Agent: python-requests/2.23.0
Accept-Encoding: gzip, deflate
Accept: */*
Connection: keep-alive

None
---------------- response ----------------
200 OK https://httpbin.org/
Date: Thu, 14 May 2020 17:16:13 GMT
Content-Type: text/html; charset=utf-8
Content-Length: 9593
Connection: keep-alive
Server: gunicorn/19.9.0
Access-Control-Allow-Origin: *
Access-Control-Allow-Credentials: true

<!DOCTYPE html>
<html lang="en">
...
</html>

You may want to change res.text to res.content if the response is binary.

A list is considered to be False if it has no elements, so you can do something like this:

{% if mylist %}
    <p>I have a list!</p>
{% else %}
    <p>I don't have a list!</p>
{% endif %}

TextView comes with 4 compound drawables, one for each of left, top, right and bottom.

In your case, you do not need the LinearLayout and ImageView at all. Just add android:drawableLeft="@drawable/up_count_big" to your TextView.

See TextView#setCompoundDrawablesWithIntrinsicBounds for more info.

[ -d ~/Desktop/TEMPORAL/ ] && echo "DIRECTORY EXISTS" || echo "DIRECTORY DOES NOT EXIST"

Note that the way the git credential helper "store" will store the unencrypted passwords changes with Git 2.5+ (Q2 2014).
See commit 17c7f4d by Junio C Hamano (gitster)

credential-xdg

Tweak the sample "store" backend of the credential helper to honor XDG configuration file locations when specified.

The doc now say:

If not specified:

• credentials will be searched for from ~/.git-credentials and $XDG_CONFIG_HOME/git/credentials, and
• credentials will be written to ~/.git-credentials if it exists, or $XDG_CONFIG_HOME/git/credentials if it exists and the former does not.

Javascript is a single-threaded language. This means it has one call stack and one memory heap. As expected, it executes code in order and must finish executing a piece code before moving onto the next. It's synchronous, but at times that can be harmful. For example, if a function takes a while to execute or has to wait on something, it freezes everything up in the meanwhile.

You can convert datetime to string.

published_at = "{}".format(self.published_at)

You get a recursion error because your attempt to access the self.__dict__ attribute inside __getattribute__ invokes your __getattribute__ again. If you use object's __getattribute__ instead, it works:

class D(object):
    def __init__(self):
        self.test=20
        self.test2=21
    def __getattribute__(self,name):
        if name=='test':
            return 0.
        else:
            return object.__getattribute__(self, name)

This works because object (in this example) is the base class. By calling the base version of __getattribute__ you avoid the recursive hell you were in before.

Ipython output with code in foo.py:

In [1]: from foo import *

In [2]: d = D()

In [3]: d.test
Out[3]: 0.0

In [4]: d.test2
Out[4]: 21

Update:

There's something in the section titled More attribute access for new-style classes in the current documentation, where they recommend doing exactly this to avoid the infinite recursion.

I recommend you to checkout @angular-material-components/datetime-picker. This is a DatetimePicker like @angular/material Datepicker by adding support for choosing time.

That's what helped me, when I was trying to deep copy a Dictionary < string, string >

Dictionary<string, string> dict2 = new Dictionary<string, string>(dict);

Good luck

From the docs ...

A string containing "\r\n" for non-Unix platforms, or a string containing "\n" for Unix platforms.

This might not be the accepted way, but I do it with screen, especially while in development because I can bring it back up and fool with it if necessary.

screen
node myserver.js
>>CTRL-A then hit D

The screen will detach and survive you logging off. Then you can get it back back doing screen -r. Hit up the screen manual for more details. You can name the screens and whatnot if you like.

This is similar to @Anon's answer in that it keeps the rest of the string's case intact, without the need for the re module.

def sliceindex(x):
    i = 0
    for c in x:
        if c.isalpha():
            i = i + 1
            return i
        i = i + 1

def upperfirst(x):
    i = sliceindex(x)
    return x[:i].upper() + x[i:]

x = '0thisIsCamelCase'

y = upperfirst(x)

print(y)
# 0ThisIsCamelCase

As @Xan pointed out, the function could use more error checking (such as checking that x is a sequence - however I'm omitting edge cases to illustrate the technique)

Updated per @normanius comment (thanks!)

Thanks to @GeoStoneMarten in pointing out I didn't answer the question! -fixed that

You can use .add() to create a new jQuery object and add to the targeted element. Use chaining then to proceed further.

For eg jQueryApi:

$( "div" ).css( "border", "2px solid red" )_x000D_
  .add( "p" )_x000D_
  .css( "background", "yellow" );

 div {_x000D_
    width: 60px;_x000D_
    height: 60px;_x000D_
    margin: 10px;_x000D_
    float: left;_x000D_
  }

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<div></div>_x000D_
<div></div>_x000D_
<div></div>_x000D_
<div></div>_x000D_
<div></div>_x000D_
<div></div>

late answer, but use this package to to check. Package Name: data_connection_checker

in you pubspec.yuml file:

dependencies:
    data_connection_checker: ^0.3.4

create a file called connection.dart or any name you want. import the package:

import 'package:data_connection_checker/data_connection_checker.dart';

check if there is internet connection or not:

print(await DataConnectionChecker().hasConnection);

It's not clear to me exactly where the high-score that you're interested in is stored, but the code below should be what you need to check if the file exists and append to it if desired. I prefer this method to the "try/except".

import os
player = 'bob'

filename = player+'.txt'

if os.path.exists(filename):
    append_write = 'a' # append if already exists
else:
    append_write = 'w' # make a new file if not

highscore = open(filename,append_write)
highscore.write("Username: " + player + '\n')
highscore.close()

You can use ListView to render a list of items. But if you don't want to use ListView, you can create a method which returns a list of Widgets (Texts in your case) like below:

var list = ["one", "two", "three", "four"];

    @override
    Widget build(BuildContext context) {
      return new MaterialApp(
          home: new Scaffold(
        appBar: new AppBar(
          title: new Text('List Test'),
        ),
        body: new Center(
          child: new Column( // Or Row or whatever :)
            children: createChildrenTexts(),
          ),
        ),
      ));
    }

     List<Text> createChildrenTexts() {
    /// Method 1
//    List<Text> childrenTexts = List<Text>();
//    for (String name in list) {
//      childrenTexts.add(new Text(name, style: new TextStyle(color: Colors.red),));
//    }
//    return childrenTexts;

    /// Method 2
    return list.map((text) => Text(text, style: TextStyle(color: Colors.blue),)).toList();
  }

The registry is the official way to detect if a specific version of the Framework is installed.

Which registry keys are needed change depending on the Framework version you are looking for:

Framework Version  Registry Key
------------------------------------------------------------------------------------------
1.0                HKLM\Software\Microsoft\.NETFramework\Policy\v1.0\3705 
1.1                HKLM\Software\Microsoft\NET Framework Setup\NDP\v1.1.4322\Install 
2.0                HKLM\Software\Microsoft\NET Framework Setup\NDP\v2.0.50727\Install 
3.0                HKLM\Software\Microsoft\NET Framework Setup\NDP\v3.0\Setup\InstallSuccess 
3.5                HKLM\Software\Microsoft\NET Framework Setup\NDP\v3.5\Install 
4.0 Client Profile HKLM\Software\Microsoft\NET Framework Setup\NDP\v4\Client\Install
4.0 Full Profile   HKLM\Software\Microsoft\NET Framework Setup\NDP\v4\Full\Install

Generally you are looking for:

"Install"=dword:00000001

except for .NET 1.0, where the value is a string (REG_SZ) rather than a number (REG_DWORD).

Determining the service pack level follows a similar pattern:

Framework Version  Registry Key
------------------------------------------------------------------------------------------
1.0                HKLM\Software\Microsoft\Active Setup\Installed Components\{78705f0d-e8db-4b2d-8193-982bdda15ecd}\Version 
1.0[1]             HKLM\Software\Microsoft\Active Setup\Installed Components\{FDC11A6F-17D1-48f9-9EA3-9051954BAA24}\Version 
1.1                HKLM\Software\Microsoft\NET Framework Setup\NDP\v1.1.4322\SP 
2.0                HKLM\Software\Microsoft\NET Framework Setup\NDP\v2.0.50727\SP 
3.0                HKLM\Software\Microsoft\NET Framework Setup\NDP\v3.0\SP 
3.5                HKLM\Software\Microsoft\NET Framework Setup\NDP\v3.5\SP 
4.0 Client Profile HKLM\Software\Microsoft\NET Framework Setup\NDP\v4\Client\Servicing
4.0 Full Profile   HKLM\Software\Microsoft\NET Framework Setup\NDP\v4\Full\Servicing

[1] Windows Media Center or Windows XP Tablet Edition

As you can see, determining the SP level for .NET 1.0 changes if you are running on Windows Media Center or Windows XP Tablet Edition. Again, .NET 1.0 uses a string value while all of the others use a DWORD.

For .NET 1.0 the string value at either of these keys has a format of #,#,####,#. The last # is the Service Pack level.

While I didn't explicitly ask for this, if you want to know the exact version number of the Framework you would use these registry keys:

Framework Version  Registry Key
------------------------------------------------------------------------------------------
1.0                HKLM\Software\Microsoft\Active Setup\Installed Components\{78705f0d-e8db-4b2d-8193-982bdda15ecd}\Version 
1.0[1]             HKLM\Software\Microsoft\Active Setup\Installed Components\{FDC11A6F-17D1-48f9-9EA3-9051954BAA24}\Version 
1.1                HKLM\Software\Microsoft\NET Framework Setup\NDP\v1.1.4322 
2.0[2]             HKLM\Software\Microsoft\NET Framework Setup\NDP\v2.0.50727\Version 
2.0[3]             HKLM\Software\Microsoft\NET Framework Setup\NDP\v2.0.50727\Increment
3.0                HKLM\Software\Microsoft\NET Framework Setup\NDP\v3.0\Version 
3.5                HKLM\Software\Microsoft\NET Framework Setup\NDP\v3.5\Version 
4.0 Client Profile HKLM\Software\Microsoft\NET Framework Setup\NDP\v4\Version 
4.0 Full Profile   HKLM\Software\Microsoft\NET Framework Setup\NDP\v4\Version 

[1] Windows Media Center or Windows XP Tablet Edition
[2] .NET 2.0 SP1
[3] .NET 2.0 Original Release (RTM)

Again, .NET 1.0 uses a string value while all of the others use a DWORD.

Additional Notes

• for .NET 1.0 the string value at either of these keys has a format of #,#,####,#. The #,#,#### portion of the string is the Framework version.

• for .NET 1.1, we use the name of the registry key itself, which represents the version number.

• Finally, if you look at dependencies, .NET 3.0 adds additional functionality to .NET 2.0 so both .NET 2.0 and .NET 3.0 must both evaulate as being installed to correctly say that .NET 3.0 is installed. Likewise, .NET 3.5 adds additional functionality to .NET 2.0 and .NET 3.0, so .NET 2.0, .NET 3.0, and .NET 3. should all evaluate to being installed to correctly say that .NET 3.5 is installed.

• .NET 4.0 installs a new version of the CLR (CLR version 4.0) which can run side-by-side with CLR 2.0.

Update for .NET 4.5

There won't be a v4.5 key in the registry if .NET 4.5 is installed. Instead you have to check if the HKLM\Software\Microsoft\NET Framework Setup\NDP\v4\Full key contains a value called Release. If this value is present, .NET 4.5 is installed, otherwise it is not. More details can be found here and here.

There are actually people wanting to write with two-way binding, but React does not work in that way.

That's true, there are people who want to write with two-way data binding. And there's nothing fundamentally wrong with React preventing them from doing so. I wouldn't recommend them to use deprecated React mixin for that, though. Because it looks so much better with some third-party packages.

import { LinkedComponent } from 'valuelink'

class Test extends LinkedComponent {
    state = { a : "Hi there! I'm databinding demo!" };

    render(){
        // Bind all state members...
        const { a } = this.linkAll();

        // Then, go ahead. As easy as that.
        return (
             <input type="text" ...a.props />
        )
    }
}

The thing is that the two-way data binding is the design pattern in React. Here's my article with a 5-minute explanation on how it works

Sometimes the value needs to be trimmed of whitespace or it won't be matched, in such case this additional step can be used (source):

if(((DropDownList) myControl1).Items.Cast<ListItem>().Select(i => i.Value.Trim() == ctrl.value.Trim()).FirstOrDefault() != null){}

You can use setInterval:

var timer = setInterval( myFunction, 1000);

Just declare your function as myFunction or some other name, and then don't bind it to $('.more')'s live event.

In my case by making build, from Build> Build apks, it worked.

Try using setAttribute on the result:

result.setAttribute("class","red"); 

'use strict'
var fs = require("fs");

/***
 * implementation of readFileSync
 */
var data = fs.readFileSync('input.txt');
console.log(data.toString());
console.log("Program Ended");

/***
 * implementation of readFile 
 */
fs.readFile('input.txt', function (err, data) {
    if (err) return console.error(err);
   console.log(data.toString());
});

console.log("Program Ended");

For better understanding run the above code and compare the results..

Others have commented on the (incorrect) use of 2/11 to specify the desired interval.

I personally however prefer writing things like that using ANSI interval literals which makes reading the query much easier:

sysdate - interval '2' hour

It also has the advantage of being portable, many DBMS support this. Plus I don't have to fire up a calculator to find out how many hours the expression means - I'm pretty bad with mental arithmetics ;)

I would try this:

printf "%g" "$var" &> /dev/null
if [[ $? == 0 ]] ; then
    echo "$var is a number."
else
    echo "$var is not a number."
fi

Note: this recognizes nan and inf as number.

How do I set up and use Meld as my git difftool?

git difftool displays the diff using a GUI diff program (i.e. Meld) instead of displaying the diff output in your terminal.

Although you can set the GUI program on the command line using -t <tool> / --tool=<tool> it makes more sense to configure it in your .gitconfig file. [Note: See the sections about escaping quotes and Windows paths at the bottom.]

# Add the following to your .gitconfig file.
[diff]
    tool = meld
[difftool]
    prompt = false
[difftool "meld"]
    cmd = meld "$LOCAL" "$REMOTE"

[Note: These settings will not alter the behaviour of git diff which will continue to function as usual.]

You use git difftool in exactly the same way as you use git diff. e.g.

git difftool <COMMIT_HASH> file_name
git difftool <BRANCH_NAME> file_name
git difftool <COMMIT_HASH_1> <COMMIT_HASH_2> file_name

If properly configured a Meld window will open displaying the diff using a GUI interface.

The order of the Meld GUI window panes can be controlled by the order of $LOCAL and $REMOTE in cmd, that is to say which file is shown in the left pane and which in the right pane. If you want them the other way around simply swap them around like this:

    cmd = meld "$REMOTE" "$LOCAL"

Finally the prompt = false line simply stops git from prompting you as to whether you want to launch Meld or not, by default git will issue a prompt.

How do I set up and use Meld as my git mergetool?

git mergetool allows you to use a GUI merge program (i.e. Meld) to resolve the merge conflicts that have occurred during a merge.

Like difftool you can set the GUI program on the command line using -t <tool> / --tool=<tool> but, as before, it makes more sense to configure it in your .gitconfig file. [Note: See the sections about escaping quotes and Windows paths at the bottom.]

# Add the following to your .gitconfig file.
[merge]
    tool = meld
[mergetool "meld"]
    # Choose one of these 2 lines (not both!) explained below.
    cmd = meld "$LOCAL" "$MERGED" "$REMOTE" --output "$MERGED"
    cmd = meld "$LOCAL" "$BASE" "$REMOTE" --output "$MERGED"

You do NOT use git mergetool to perform an actual merge. Before using git mergetool you perform a merge in the usual way with git. e.g.

git checkout master
git merge branch_name

If there is a merge conflict git will display something like this:

$ git merge branch_name
Auto-merging file_name
CONFLICT (content): Merge conflict in file_name
Automatic merge failed; fix conflicts and then commit the result.

At this point file_name will contain the partially merged file with the merge conflict information (that's the file with all the >>>>>>> and <<<<<<< entries in it).

Mergetool can now be used to resolve the merge conflicts. You start it very easily with:

git mergetool

If properly configured a Meld window will open displaying 3 files. Each file will be contained in a separate pane of its GUI interface.

In the example .gitconfig entry above, 2 lines are suggested as the [mergetool "meld"] cmd line. In fact there are all kinds of ways for advanced users to configure the cmd line, but that is beyond the scope of this answer.

This answer has 2 alternative cmd lines which, between them, will cater for most users, and will be a good starting point for advanced users who wish to take the tool to the next level of complexity.

Firstly here is what the parameters mean:

• $LOCAL is the file in the current branch (e.g. master).
• $REMOTE is the file in the branch being merged (e.g. branch_name).
• $MERGED is the partially merged file with the merge conflict information in it.
• $BASE is the shared commit ancestor of $LOCAL and $REMOTE, this is to say the file as it was when the branch containing $REMOTE was originally created.

I suggest you use either:

[mergetool "meld"]
    cmd = meld "$LOCAL" "$MERGED" "$REMOTE" --output "$MERGED"

or:

[mergetool "meld"]
    cmd = meld "$LOCAL" "$BASE" "$REMOTE" --output "$MERGED"
    # See 'Note On Output File' which explains --output "$MERGED".

The choice is whether to use $MERGED or $BASE in between $LOCAL and $REMOTE.

Either way Meld will display 3 panes with $LOCAL and $REMOTE in the left and right panes and either $MERGED or $BASE in the middle pane.

In BOTH cases the middle pane is the file that you should edit to resolve the merge conflicts. The difference is just in which starting edit position you'd prefer; $MERGED for the file which contains the partially merged file with the merge conflict information or $BASE for the shared commit ancestor of $LOCAL and $REMOTE. [Since both cmd lines can be useful I keep them both in my .gitconfig file. Most of the time I use the $MERGED line and the $BASE line is commented out, but the commenting out can be swapped over if I want to use the $BASE line instead.]

Note On Output File: Do not worry that --output "$MERGED" is used in cmd regardless of whether $MERGED or $BASE was used earlier in the cmd line. The --output option simply tells Meld what filename git wants the conflict resolution file to be saved in. Meld will save your conflict edits in that file regardless of whether you use $MERGED or $BASE as your starting edit point.

After editing the middle pane to resolve the merge conflicts, just save the file and close the Meld window. Git will do the update automatically and the file in the current branch (e.g. master) will now contain whatever you ended up with in the middle pane.

git will have made a backup of the partially merged file with the merge conflict information in it by appending .orig to the original filename. e.g. file_name.orig. After checking that you are happy with the merge and running any tests you may wish to do, the .orig file can be deleted.

At this point you can now do a commit to commit the changes.

If, while you are editing the merge conflicts in Meld, you wish to abandon the use of Meld, then quit Meld without saving the merge resolution file in the middle pane. git will respond with the message file_name seems unchanged and then ask Was the merge successful? [y/n], if you answer n then the merge conflict resolution will be aborted and the file will remain unchanged. Note that if you have saved the file in Meld at any point then you will not receive the warning and prompt from git. [Of course you can just delete the file and replace it with the backup .orig file that git made for you.]

If you have more than 1 file with merge conflicts then git will open a new Meld window for each, one after another until they are all done. They won't all be opened at the same time, but when you finish editing the conflicts in one, and close Meld, git will then open the next one, and so on until all the merge conflicts have been resolved.

It would be sensible to create a dummy project to test the use of git mergetool before using it on a live project. Be sure to use a filename containing a space in your test, in case your OS requires you to escape the quotes in the cmd line, see below.

Escaping quote characters

Some operating systems may need to have the quotes in cmd escaped. Less experienced users should remember that config command lines should be tested with filenames that include spaces, and if the cmd lines don't work with the filenames that include spaces then try escaping the quotes. e.g.

cmd = meld \"$LOCAL\" \"$REMOTE\"

In some cases more complex quote escaping may be needed. The 1st of the Windows path links below contains an example of triple-escaping each quote. It's a bore but sometimes necessary. e.g.

cmd = meld \\\"$LOCAL\\\" \\\"$REMOTE\\\"

Windows paths

Windows users will probably need extra configuration added to the Meld cmd lines. They may need to use the full path to meldc, which is designed to be called on Windows from the command line, or they may need or want to use a wrapper. They should read the StackOverflow pages linked below which are about setting the correct Meld cmd line for Windows. Since I am a Linux user I am unable to test the various Windows cmd lines and have no further information on the subject other than to recommend using my examples with the addition of a full path to Meld or meldc, or adding the Meld program folder to your path.

• Git Diff and Meld on Windows
• How to set Meld as git mergetool
• Git mergetool with Meld on Windows

Ignoring trailing whitespace with Meld

Meld has a number of preferences that can be configured in the GUI.

In the preferences Text Filters tab there are several useful filters to ignore things like comments when performing a diff. Although there are filters to ignore All whitespace and Leading whitespace, there is no ignore Trailing whitespace filter (this has been suggested as an addition in the Meld mailing list but is not available in my version).

Ignoring trailing whitespace is often very useful, especially when collaborating, and can be manually added easily with a simple regular expression in the Meld preferences Text Filters tab.

# Use either of these regexes depending on how comprehensive you want it to be.
[ \t]*$
[ \t\r\f\v]*$

I hope this helps everyone.

Wow, this problem is popular. It's based on a misunderstanding in the vertical-align property. This excellent article explains it:

Understanding vertical-align, or "How (Not) To Vertically Center Content" by Gavin Kistner.

“How to center in CSS” is a great web tool which helps to find the necessary CSS centering attributes for different situations.

In a nutshell _{^{(and to prevent link rot)}}:

• Inline elements (and only inline elements) can be vertically aligned in their context via vertical-align: middle. However, the “context” isn’t the whole parent container height, it’s the height of the text line they’re in. jsfiddle example
• For block elements, vertical alignment is harder and strongly depends on the specific situation:
  • If the inner element can have a fixed height, you can make its position absolute and specify its height, margin-top and top position. jsfiddle example
  • If the centered element consists of a single line and its parent height is fixed you can simply set the container’s line-height to fill its height. This method is quite versatile in my experience. jsfiddle example
  • … there are more such special cases.

Check Demo: https://stackblitz.com/edit/angular-6-checkbox?embed=1&file=src/app/app.component.html

  CheckBox: use change event to call the function and pass the event.

<label class="container">    
   <input type="checkbox" [(ngModel)]="theCheckbox"  data-md-icheck 
    (change)="toggleVisibility($event)"/>
      Checkbox is <span *ngIf="marked">checked</span><span 
     *ngIf="!marked">unchecked</span>
     <span class="checkmark"></span>
</label>
 <div>And <b>ngModel</b> also works, it's value is <b>{{theCheckbox}}</b></div>

If you can change the order of the elements:

 int[] myArray = new int[]{1, 3, 8, 5, 7, };
 Arrays.sort(myArray);
 int max = myArray[myArray.length - 1];

If you can't change the order of the elements:

int[] myArray = new int[]{1, 3, 8, 5, 7, };
int max = Integer.MIN_VALUE;
for(int i = 0; i < myArray.length; i++) {
      if(myArray[i] > max) {
         max = myArray[i];
      }
}

Do, I need to resolve all the conflicts before proceeding to next cherry -pick

Yes, at least with the standard git setup. You cannot cherry-pick while there are conflicts.

Furthermore, in general conflicts get harder to resolve the more you have, so it's generally better to resolve them one by one.

That said, you can cherry-pick multiple commits at once, which would do what you are asking for. See e.g. How to cherry-pick multiple commits . This is useful if for example some commits undo earlier commits. Then you'd want to cherry-pick all in one go, so you don't have to resolve conflicts for changes that are undone by later commits.

Further, is it suggested to do cherry-pick or branch merge in this case?

Generally, if you want to keep a feature branch up to date with main development, you just merge master -> feature branch. The main advantage is that a later merge feature branch -> master will be much less painful.

Cherry-picking is only useful if you must exclude some changes in master from your feature branch. Still, this will be painful so I'd try to avoid it.

Don’t use foo.css?version=1!

Browsers aren't supposed to cache URLs with GET variables. According to http://www.thinkvitamin.com/features/webapps/serving-javascript-fast, though Internet Explorer and Firefox ignore this, Opera and Safari don't! Instead, use foo.v1234.css, and use rewrite rules to strip out the version number.

Your cells object is not fully qualified. You need to add a DOT before the cells object. For example

With Worksheets("Cable Cards")
    .Range(.Cells(RangeStartRow, RangeStartColumn), _
           .Cells(RangeEndRow, RangeEndColumn)).PasteSpecial xlValues

Similarly, fully qualify all your Cells object.

You can put an equal formula, then copy it so reference the whole range (one cell goes into one cell)

=Sheet2!A1

If you need to concatenate the results, you'll need a longer formula, or a user-defined function (i.e. macro).

=Sheet2!A1&Sheet2!B1&Sheet2!C1&Sheet2!D1&Sheet2!E1&Sheet2!F1

I've found that scrolling in viewWillAppear may not work reliably because the collection view hasn't finished it's layout yet; you may scroll to the wrong item.

I've also found that scrolling in viewDidAppear will cause a momentary flash of the unscrolled view to be visible.

And, if you scroll every time through viewDidLayoutSubviews, the user won't be able to manually scroll because some collection layouts cause subview layout every time you scroll.

Here's what I found works reliably:

Objective C :

- (void)viewDidLayoutSubviews {
    [super viewDidLayoutSubviews];

    // If we haven't done the initial scroll, do it once.
    if (!self.initialScrollDone) {
        self.initialScrollDone = YES;

        [self.collectionView scrollToItemAtIndexPath:self.myInitialIndexPath
                                    atScrollPosition:UICollectionViewScrollPositionRight animated:NO];
    }
}

Swift :

 override func viewWillLayoutSubviews() {

    super.viewWillLayoutSubviews()

      if (!self.initialScrollDone) {

         self.initialScrollDone = true
         self.testNameCollectionView.scrollToItem(at:selectedIndexPath, at: .centeredHorizontally, animated: true)
    }

}

HTTP 499 in Nginx means that the client closed the connection before the server answered the request. In my experience is usually caused by client side timeout. As I know it's an Nginx specific error code.

I am also a newbie to Ruby and I faced similar issues in duplicating a hash. Use the following. I've got no idea about the speed of this method.

copy_of_original_hash = Hash.new.merge(original_hash)

It could be done by getting the page title by Selenium and do assertion by using TestNG.

1. Import Assert class in the import section:

   `import org.testng.Assert;`
   

2. Create a WebDriver object:

   WebDriver driver=new FirefoxDriver();

3. Apply this to assert the title of the page:

   Assert.assertEquals("Expected page title", driver.getTitle());

Try this:

print("".join(str(x) for x in This))

How about emulating a const array via an accessor function? It's non-static (as you requested), and it doesn't require stl or any other library:

class a {
    int privateB[2];
public:
    a(int b0,b1) { privateB[0]=b0; privateB[1]=b1; }
    int b(const int idx) { return privateB[idx]; }
}

Because a::privateB is private, it is effectively constant outside a::, and you can access it similar to an array, e.g.

a aobj(2,3);    // initialize "constant array" b[]
n = aobj.b(1);  // read b[1] (write impossible from here)

If you are willing to use a pair of classes, you could additionally protect privateB from member functions. This could be done by inheriting a; but I think I prefer John Harrison's comp.lang.c++ post using a const class.

Using bootstrap this is the shortest and cleanest approach to create a link to a controller action that appears as a dynamic button:

<a href='@Url.Action("Action", "Controller")' class="btn btn-primary">Click Me</a>

Or to use Html helpers:

@Html.ActionLink("Click Me", "Action", "Controller", new { @class = "btn btn-primary" })

My 2 cents. You can get the keys in an array and then loop through the array. This will affect performance of this code block if the map is pretty big , where in you are getting the keys in an array first which might consume some time and then you are looping. Otherwise for smaller maps it should be ok.

String[] keys =  yourMap.keySet().toArray(new String[0]);

for(int i = 0 ; i < keys.length ; i++){
    //This is your key    
    String key = keys[i];

    //This is your value
    yourMap.get(key)            
}

New solution with ES6

Default object

object = [{'id': 1}, {'id': 2}, {'id': 3}, {'id': 4}];

Another object

object =  {'id': 5};

Object assign ES6

resultObject = {...obj, ...newobj};

Result

[{'id': 1}, {'id': 2}, {'id': 3}, {'id': 4}, {'id': 5}];

Just check for it before you pass to your function. So you would pass:

thing.foo ? thing.foo.bar : undefined

If lists always have the same structure, as in the example, then a simpler solution is

mapply(c, first, second, SIMPLIFY=FALSE)

DBMS_OUTPUT is not the best tool to debug, since most environments don't use it natively. If you want to capture the output of DBMS_OUTPUT however, you would simply use the DBMS_OUTPUT.get_line procedure.

Here is a small example:

SQL> create directory tmp as '/tmp/';

Directory created

SQL> CREATE OR REPLACE PROCEDURE write_log AS
  2     l_line VARCHAR2(255);
  3     l_done NUMBER;
  4     l_file utl_file.file_type;
  5  BEGIN
  6     l_file := utl_file.fopen('TMP', 'foo.log', 'A');
  7     LOOP
  8        EXIT WHEN l_done = 1;
  9        dbms_output.get_line(l_line, l_done);
 10        utl_file.put_line(l_file, l_line);
 11     END LOOP;
 12     utl_file.fflush(l_file);
 13     utl_file.fclose(l_file);
 14  END write_log;
 15  /

Procedure created

SQL> BEGIN
  2     dbms_output.enable(100000);
  3     -- write something to DBMS_OUTPUT
  4     dbms_output.put_line('this is a test');
  5     -- write the content of the buffer to a file
  6     write_log;
  7  END;
  8  /

PL/SQL procedure successfully completed

SQL> host cat /tmp/foo.log

this is a test

As your list is an ArrayList, it can be assumed that it is unsorted. Therefore, there is no way to search for your element that is faster than O(n).

If you can, you should think about changing your list into a Set (with HashSet as implementation) with a specific Comparator for your sample class.

Another possibility would be to use a HashMap. You can add your data as Sample (please start class names with an uppercase letter) and use the string you want to search for as key. Then you could simply use

Sample samp = myMap.get(myKey);

If there can be multiple samples per key, use Map<String, List<Sample>>, otherwise use Map<String, Sample>. If you use multiple keys, you will have to create multiple maps that hold the same dataset. As they all point to the same objects, space shouldn't be that much of a problem.

export ROOT_DIR=<path/value>

Then use the variable, $(ROOT_DIR) in the Makefile.

Maven needs the dependencies in your local repository. The easiest way to get them is with internet access (or harder using other solutions provided here).

So assumed that you can get temporarily internet access you can prepare to go offline using the maven-dependency-plugin with its dependency:go-offline goal. This will download all your project dependencies to your local repository (of course changes in the dependencies / plugins will require new internet / central repository access).

Stick to php...

Why not only allow the button to appear once an above criteria is met.

<?
if (whatever == something) {
    $display = '<input id="Button" type="button" value="+" style="background-color:grey" onclick="Me();"/>';
    return $display;
}
?>

There is also https://github.com/Valloric/YouCompleteMe and it includes things like Jedi and also has fuzzy match. So far I found YCM to be the fastest among what I have tried.

Edit: There also exists some new ones like https://github.com/maralla/completor.vim

I'm under Linux too. For me, it only works when I press CTRL+SHIFT+/, and it's like a single comment, not a block comment. The reason is to acceed the / character, I have to press SHIFT, if I do not, sublime text detects that I pressed CTRL + :.

Here it is my solution to get back normal preferences. Write in Key Bindings - User :

{ "keys": ["ctrl+:"], "command": "toggle_comment", "args": { "block": false } }, { "keys": ["ctrl+shift+:"], "command": "toggle_comment", "args": { "block": true } }

If you want IsLoggedIn to be treated as a boolean you should initialize as follows:

var IsLoggedIn=true;

If you initialize it with var IsLoggedIn=1; then it will be treated as an integer.

However at any time the variable IsLoggedIn could refer to a different data type:

 IsLoggedIn="Hello World";

This will not cause an error.

Use rand(range)

From Ruby Random Numbers:

If you needed a random integer to simulate a roll of a six-sided die, you'd use: 1 + rand(6). A roll in craps could be simulated with 2 + rand(6) + rand(6).

Finally, if you just need a random float, just call rand with no arguments.

As Marc-André Lafortune mentions in his answer below (go upvote it), Ruby 1.9.2 has its own Random class (that Marc-André himself helped to debug, hence the 1.9.2 target for that feature).

For instance, in this game where you need to guess 10 numbers, you can initialize them with:

10.times.map{ 20 + Random.rand(11) } 
#=> [26, 26, 22, 20, 30, 26, 23, 23, 25, 22]

Note:

• Using Random.new.rand(20..30) (using Random.new) generally would not be a good idea, as explained in detail (again) by Marc-André Lafortune, in his answer (again).

• But if you don't use Random.new, then the class method rand only takes a max value, not a Range, as banister (energetically) points out in the comment (and as documented in the docs for Random). Only the instance method can take a Range, as illustrated by generate a random number with 7 digits.

This is why the equivalent of Random.new.rand(20..30) would be 20 + Random.rand(11), since Random.rand(int) returns “a random integer greater than or equal to zero and less than the argument.” 20..30 includes 30, I need to come up with a random number between 0 and 11, excluding 11.

The r makes the string a raw string, which doesn't process escape characters (however, since there are none in the string, it is actually not needed here).

Also, re.match matches from the beginning of the string. In other words, it looks for an exact match between the string and the pattern. To match stuff that could be anywhere in the string, use re.search. See a demonstration below:

>>> import re
>>> line = 'This,is,a,sample,string'
>>> re.match("sample", line)
>>> re.search("sample", line)
<_sre.SRE_Match object at 0x021D32C0>
>>>

from within the vscode terminal,

git remote set-url origin https://<your github username>:<your password>@github.com/<your github username>/<your github repository name>.git

for the quickest, but not so encouraged way.

You can do it using javascript. Grab the value of the form field in your submit function, parse out the extension.

You can start with something like this:

<form name="someform"enctype="multipart/form-data" action="uploader.php" method="POST">
<input type=file name="file1" />
<input type=button onclick="val()" value="xxxx" />
</form>
<script>
function val() {
    alert(document.someform.file1.value)
}
</script>

I agree with alexmac - do it server-side as well.

You can also use the form recommended by ES6:

data => {
  this.results = [
    ...this.results,
    data.results,
  ];
  this._next = data.next;
},

This works if you initialize your array first (public results = [];); otherwise replace ...this.results, by ...this.results ? this.results : [],.

Hope this helps

Amit, I have used one way to achieve this with less coding and more efficient way.

but it uses Linq.

I posted it here because maybe the answer helps other SO.

Below DAL code converts datatable object to List of YourViewModel and it's easy to understand.

public static class DAL
{
        public static string connectionString = ConfigurationManager.ConnectionStrings["YourWebConfigConnection"].ConnectionString;

        // function that creates a list of an object from the given data table
        public static List<T> CreateListFromTable<T>(DataTable tbl) where T : new()
        {
            // define return list
            List<T> lst = new List<T>();

            // go through each row
            foreach (DataRow r in tbl.Rows)
            {
                // add to the list
                lst.Add(CreateItemFromRow<T>(r));
            }

            // return the list
            return lst;
        }

        // function that creates an object from the given data row
        public static T CreateItemFromRow<T>(DataRow row) where T : new()
        {
            // create a new object
            T item = new T();

            // set the item
            SetItemFromRow(item, row);

            // return 
            return item;
        }

        public static void SetItemFromRow<T>(T item, DataRow row) where T : new()
        {
            // go through each column
            foreach (DataColumn c in row.Table.Columns)
            {
                // find the property for the column
                PropertyInfo p = item.GetType().GetProperty(c.ColumnName);

                // if exists, set the value
                if (p != null && row[c] != DBNull.Value)
                {
                    p.SetValue(item, row[c], null);
                }
            }
        }

        //call stored procedure to get data.
        public static DataSet GetRecordWithExtendedTimeOut(string SPName, params SqlParameter[] SqlPrms)
        {
            DataSet ds = new DataSet();
            SqlCommand cmd = new SqlCommand();
            SqlDataAdapter da = new SqlDataAdapter();
            SqlConnection con = new SqlConnection(connectionString);

            try
            {
                cmd = new SqlCommand(SPName, con);
                cmd.Parameters.AddRange(SqlPrms);
                cmd.CommandTimeout = 240;
                cmd.CommandType = CommandType.StoredProcedure;
                da.SelectCommand = cmd;
                da.Fill(ds);
            }
            catch (Exception ex)
            {
               return ex;
            }

            return ds;
        }
}

Now, The way to pass and call method is below.

    DataSet ds = DAL.GetRecordWithExtendedTimeOut("ProcedureName");

    List<YourViewModel> model = new List<YourViewModel>();

    if (ds != null)
    {
        //Pass datatable from dataset to our DAL Method.
        model = DAL.CreateListFromTable<YourViewModel>(ds.Tables[0]);                
    }      

Till the date, for many of my applications, I found this as the best structure to get data.

Of course, you can't fully rely on the client-side (javascript) validation, but that's not a reason to avoid it completely. With or without it, you have to do the server-side validation anyway (since the client can disable javascript). And that's just what you're left with, due to your non-javascript solution constraint.

So, after a submit, if the field value doesn't pass the server-side validation, the client should end up on the very same page, with additional error message specifying the requested value format. You also should provide the value format information beforehands, e.g. as a tool-tip hint (title attribute).

There's most certainly no passive client-side validation mechanism existing in HTML 4 / XHTML.

On the other hand, in HTML 5 you have two options:

• input of type number:

  <input type="number" min="xxx" max="yyy" title="Format: 3 digits" />
  

  – only validates the range – if user enters a non-number, an empty value is submitted
  – the field visual is enhanced with increment / decrement controls (browser dependent)

• the pattern attribute:

  <input type="text" pattern="[0-9]{3}" title="Format: 3 digits" />
  <input type="text" pattern="\d{3}" title="Format: 3 digits" />
  

  – this gives you a full contorl over the format (anything you can specify by regular expression)
  – no visual difference / enhancement

But here you still rely on browser capabilities, so do a server-side validation in either case.

For those people with (cannot connect to localhost:5555: No connection could be made because the target machine actively refused it. (10061) :

Blustacks is listening at IPv4-Localhost-TCP-5555 (not IPv6). Most of the time Windows has IPv6 enabled by default and Localhost is solving ::1:

If the client (ADB) tries to connect a server using localhost and IPv6 is enabled on the main network adapter, ADB will not connect to the server.

So, you have two options :

1- Change your ADB client TCP connection string to localhost IPV4 : adb connect 127.0.0.1

OR :

2-Disable IPV6 protocol from the main network adapter.

.net Framework allows PictureBox Control to Load Images from url

and Save image in Laod Complete Event

protected void LoadImage() {
 pictureBox1.ImageLocation = "PROXY_URL;}

void pictureBox1_LoadCompleted(object sender, AsyncCompletedEventArgs e) {
   pictureBox1.Image.Save(destination); }

Well So I was trying to fix this error. And none worked for me. I was not able to figure out solution. Scenario:

I was just going to made a Navigation Drawer Project inside Android Studio 2.1.2 And when I try to change the default Android icon in nav_header_main.xml I was getting some weird errors. I figured out that I was droping my PNG logo into the ...\app\src\main\res\drawable-21. When I try to put my PNG logo in ...\app\src\main\res\drawable bam! All weird errors go away.

Following are some of stack trace when I was putting PNG into drawable-21 folder:

08-17 17:29:56.237 6644-6678/myAppName  E/dalvikvm: Could not find class 'android.util.ArrayMap', referenced from method com.android.tools.fd.runtime.Restarter.getActivities
08-17 17:30:01.674 6644-6644/myAppName E/AndroidRuntime: FATAL EXCEPTION: main
                                                                         java.lang.RuntimeException: Unable to start activity ComponentInfo{myAppName.MainActivity}: android.view.InflateException: Binary XML file line #16: Error inflating class <unknown>
                                                                             at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2372)
                                                                             at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2424)
                                                                             at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3956)
                                                                             at android.app.ActivityThread.access$700(ActivityThread.java:169)
                                                                             at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1394)
                                                                             at android.os.Handler.dispatchMessage(Handler.java:107)
                                                                             at android.os.Looper.loop(Looper.java:194)
                                                                             at android.app.ActivityThread.main(ActivityThread.java:5433)
                                                                             at java.lang.reflect.Method.invokeNative(Native Method)
                                                                             at java.lang.reflect.Method.invoke(Method.java:525)
                                                                             at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:924)
                                                                             at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:691)
                                                                             at dalvik.system.NativeStart.main(Native Method)
                                                                          Caused by: android.view.InflateException: Binary XML file line #16: Error inflating class <unknown>
                                                                             at android.view.LayoutInflater.createView(LayoutInflater.java:613)
                                                                             at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:687)
                                                                             at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
                                                                             at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
                                                                             at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
                                                                             at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
                                                                             at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:280)
                                                                             at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
                                                                             at edu.uswat.fwd82.findmedoc.MainActivity.onCreate(MainActivity.java:22)
                                                                             at android.app.Activity.performCreate(Activity.java:5179)
                                                                             at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1146)
                                                                             at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2336)
                                                                             at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2424) 
                                                                             at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3956) 
                                                                             at android.app.ActivityThread.access$700(ActivityThread.java:169) 
                                                                             at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1394) 
                                                                             at android.os.Handler.dispatchMessage(Handler.java:107) 
                                                                             at android.os.Looper.loop(Looper.java:194) 
                                                                             at android.app.ActivityThread.main(ActivityThread.java:5433) 
                                                                             at java.lang.reflect.Method.invokeNative(Native Method) 
                                                                             at java.lang.reflect.Method.invoke(Method.java:525) 
                                                                             at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:924) 
                                                                             at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:691) 
                                                                             at dalvik.system.NativeStart.main(Native Method) 
                                                                          Caused by: java.lang.reflect.InvocationTargetException
                                                                             at java.lang.reflect.Constructor.constructNative(Native Method)
                                                                             at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
                                                                             at android.view.LayoutInflater.createView(LayoutInflater.java:587)
                                                                             at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:687) 
                                                                             at android.view.LayoutInflater.rInflate(LayoutInflater.java:746) 
                                                                             at android.view.LayoutInflater.inflate(LayoutInflater.java:489) 
                                                                             at android.view.LayoutInflater.inflate(LayoutInflater.java:396) 
                                                                             at android.view.LayoutInflater.inflate(LayoutInflater.java:352) 
                                                                             at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:280) 
                                                                             at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140) 
                                                                             at edu.uswat.fwd82.findmedoc.MainActivity.onCreate(MainActivity.java:22) 
                                                                             at android.app.Activity.performCreate(Activity.java:5179) 
                                                                             at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1146) 
                                                                             at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2336) 
                                                                             at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2424) 
                                                                             at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3956) 
                                                                             at android.app.ActivityThread.access$700(ActivityThread.java:169) 
                                                                             at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1394) 
                                                                             at android.os.Handler.dispatchMessage(Handler.java:107) 
                                                                             at android.os.Looper.loop(Looper.java:194) 
                                                                             at android.app.ActivityThread.main(ActivityThread.java:5433) 
                                                                             at java.lang.reflect.Method.invokeNative(Native Method) 
                                                                             at java.lang.reflect.Method.invoke(Method.java:525) 
                                                                             at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:924) 
                                                                             at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:691) 
                                                                             at dalvik.system.NativeStart.main(Native Method) 
                                                                          Caused by: android.view.InflateException: Binary XML file line #14: Error inflating class ImageView
                                                                             at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
                                                                             at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
                                                                             at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
                                                                             at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
at android.support.design.internal.NavigationMenuPresenter.inflateHeaderView(NavigationMenuPresenter.java:189)
at android.support.design.widget.NavigationView.inflateHeaderView(NavigationView.java:262)
at android.support.design.widget.NavigationView.<init>(NavigationView.java:173)
at android.support.design.widget.NavigationView.<init>(NavigationView.java:95)
at java.lang.reflect.Constructor.constructNative(Native Method) 
at java.lang.reflect.Constructor.newInstance(Constructor.java:417) 
at android.view.LayoutInflater.createView(LayoutInflater.java:587) 
                                                                             at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:687) 
                                                                             at android.view.LayoutInflater.rInflate(LayoutInflater.java:746) 
                                                                             at android.view.LayoutInflater.inflate(LayoutInflater.java:489) 
                                                                             at android.view.LayoutInflater.inflate(LayoutInflater.java:396) 
                                                                             at android.view.LayoutInflater.inflate(LayoutInflater.java:352) 
                                                                             at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:280) 
                                                                             at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140) 
                                                                             at edu.uswat.fwd82.findmedoc.MainActivity.onCreate(MainActivity.java:22) 
                                                                             at android.app.Activity.performCreate(Activity.java:5179) 
                                                                             at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1146) 
                                                                             at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2336) 
                                                                             at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2424) 
                                                                             at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3956) 
                                                                             at android.app.ActivityThread.access$700(ActivityThread.java:169) 
                                                                             at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1394) 
                                                                             at android.os.Handler.dispatchMessage(Handler.java:107) 
                                                                             at android.os.Looper.loop(Looper.java:194) 
                                                                             at android.app.ActivityThread.main(ActivityThread.java:5433) 
                                                                             at java.lang.reflect.Method.invokeNative(Native Method) 
                                                                             at java.lang.reflect.Method.invoke(Method.java:525) 
                                                                             at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:924) 
                                                                             at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:691) 
                                                                             at dalvik.system.NativeStart.main(Native Method) 
                                                                          Caused by: java.lang.NullPointerException
                                                                             at android.content.res.ResourcesEx.getThemeDrawable(ResourcesEx.java:459)
                                                                             at android.content.res.ResourcesEx.loadDrawable(ResourcesEx.java:435)
                                                                             at android.content.res.TypedArray.getDrawable(TypedArray.java:609)
                                                                             at android.widget.ImageView.<init>(ImageView.java:120)
                                                                             at android.support.v7.widget.AppCompatImageView.<init>(AppCompatImageView.java:57)
                                                                             at android.support.v7.widget.AppCompatImageView.<init>(AppCompatImageView.java:53)
                                                                             at android.support.v7.app.AppCompatViewInflater.createView(AppCompatViewInflater.java:106)
                                                                             at android.support.v7.app.AppCompatDelegateImplV7.createView(AppCompatDelegateImplV7.java:980)
                                                                             at android.support.v7.app.AppCompatDelegateImplV7.onCreateView(AppCompatDelegateImplV7.java:1039)
                                                                             at android.support.v4.view.LayoutInflaterCompatHC$FactoryWrapperHC.onCreateView(LayoutInflaterCompatHC.java:44)
                                                                            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:

As you can see the above Stack Trace include:

android.support.design.widget.NavigationView.inflateHeaderView(NavigationView.java:262) at android.support.design.widget.NavigationView.(NavigationView.java:173) at android.support.design.widget.NavigationView.(NavigationView.java:95)

put into javascript external file

   (function ($) {
 $(window).keydown(function (event) {  

    if (event.keyCode == 13) {

        return false;
    }
});

 })(jQuery);

or somewhere inside body tag

<script>


$(document).ready(function() {
    $(window).keydown(function(event) {
        alert(1);

        if(event.keyCode == 13) {

            return false;
        }
    });
});

</script>

Use CSS. It's easier and faster than javascript.

overflow-x: hidden;
overflow-y: scroll;

An alternative way to (not dynamically) link a text to activate a worksheet without macros is to make the selected string an actual link. You can do this by selecting the cell that contains the text and press CTRL+K then select the option/tab 'Place in this document' and select the tab you want to activate. If you would click the text (that is now a link) the configured sheet will become active/selected.

Allocate maximum memory to your docker machine from (docker preference -> advance )

Screenshot of advance settings:

This will set the maximum limit docker consume while running containers. Now run your image in new container with -m=4g flag for 4 gigs ram or more. e.g.

docker run -m=4g {imageID}

Remember to apply the ram limit increase changes. Restart the docker and double check that ram limit did increased. This can be one of the factor you not see the ram limit increase in docker containers.

In my case, the instalation didn't add MySQL\MySQL Server 5.7/bin folder to my PATH env variable.

This should fix the error

<plugin>
     <groupId>org.apache.maven.plugins</groupId>
     <artifactId>maven-resources-plugin</artifactId>
     <version>2.7</version>
     <dependencies>
         <dependency>
             <groupId>org.apache.maven.shared</groupId>
             <artifactId>maven-filtering</artifactId>
             <version>1.3</version>
          </dependency>
      </dependencies>
</plugin>

Try {{model?.person.name}} this should wait for model to not be undefined and then render.

Angular 2 refers to this ?. syntax as the Elvis operator. Reference to it in the documentation is hard to find so here is a copy of it in case they change/move it:

The Elvis Operator ( ?. ) and null property paths

The Angular “Elvis” operator ( ?. ) is a fluent and convenient way to guard against null and undefined values in property paths. Here it is, protecting against a view render failure if the currentHero is null.

The current hero's name is {{currentHero?.firstName}}

Let’s elaborate on the problem and this particular solution.

What happens when the following data bound title property is null?

The title is {{ title }}

The view still renders but the displayed value is blank; we see only "The title is" with nothing after it. That is reasonable behavior. At least the app doesn't crash.

Suppose the template expression involves a property path as in this next example where we’re displaying the firstName of a null hero.

The null hero's name is {{nullHero.firstName}}

JavaScript throws a null reference error and so does Angular:

TypeError: Cannot read property 'firstName' of null in [null]

Worse, the entire view disappears.

We could claim that this is reasonable behavior if we believed that the hero property must never be null. If it must never be null and yet it is null, we've made a programming error that should be caught and fixed. Throwing an exception is the right thing to do.

On the other hand, null values in the property path may be OK from time to time, especially when we know the data will arrive eventually.

While we wait for data, the view should render without complaint and the null property path should display as blank just as the title property does.

Unfortunately, our app crashes when the currentHero is null.

We could code around that problem with NgIf

<!--No hero, div not displayed, no error --> <div *ngIf="nullHero">The null hero's name is {{nullHero.firstName}}</div>

Or we could try to chain parts of the property path with &&, knowing that the expression bails out when it encounters the first null.

The null hero's name is {{nullHero && nullHero.firstName}}

These approaches have merit but they can be cumbersome, especially if the property path is long. Imagine guarding against a null somewhere in a long property path such as a.b.c.d.

The Angular “Elvis” operator ( ?. ) is a more fluent and convenient way to guard against nulls in property paths. The expression bails out when it hits the first null value. The display is blank but the app keeps rolling and there are no errors.

<!-- No hero, no problem! --> The null hero's name is {{nullHero?.firstName}}

It works perfectly with long property paths too:

a?.b?.c?.d

Try this if you want to display one of duplicate rows based on RequestID and CreatedDate and show the latest HistoryStatus.

with t as (select row_number()over(partition by RequestID,CreatedDate order by RequestID) as rnum,* from tbltmp)
Select RequestID,CreatedDate,HistoryStatus from t a where  rnum in (SELECT Max(rnum) FROM t GROUP BY RequestID,CreatedDate having t.RequestID=a.RequestID)

or if you want to select one of duplicate rows considering CreatedDate only and show the latest HistoryStatus then try the query below.

with t as (select row_number()over(partition by CreatedDate order by RequestID) as rnum,* from tbltmp)
Select RequestID,CreatedDate,HistoryStatus from t  where  rnum = (SELECT Max(rnum) FROM t)

Or if you want to select one of duplicate rows considering Request ID only and show the latest HistoryStatus then use the query below

with t as (select row_number()over(partition by RequestID order by RequestID) as rnum,* from tbltmp)
Select RequestID,CreatedDate,HistoryStatus from t a where  rnum in (SELECT Max(rnum) FROM t GROUP BY RequestID,CreatedDate having t.RequestID=a.RequestID)

All the above queries I have written in sql server 2005.

TagLib Sharp has support for reading ID3 tags.

Update

S3 now offers a fully-managed SFTP Gateway Service for S3 that integrates with IAM and can be administered using aws-cli.

There are theoretical and practical reasons why this isn't a perfect solution, but it does work...

You can install an FTP/SFTP service (such as proftpd) on a linux server, either in EC2 or in your own data center... then mount a bucket into the filesystem where the ftp server is configured to chroot, using s3fs.

I have a client that serves content out of S3, and the content is provided to them by a 3rd party who only supports ftp pushes... so, with some hesitation (due to the impedance mismatch between S3 and an actual filesystem) but lacking the time to write a proper FTP/S3 gateway server software package (which I still intend to do one of these days), I proposed and deployed this solution for them several months ago and they have not reported any problems with the system.

As a bonus, since proftpd can chroot each user into their own home directory and "pretend" (as far as the user can tell) that files owned by the proftpd user are actually owned by the logged in user, this segregates each ftp user into a "subdirectory" of the bucket, and makes the other users' files inaccessible.

There is a problem with the default configuration, however.

Once you start to get a few tens or hundreds of files, the problem will manifest itself when you pull a directory listing, because ProFTPd will attempt to read the .ftpaccess files over, and over, and over again, and for each file in the directory, .ftpaccess is checked to see if the user should be allowed to view it.

You can disable this behavior in ProFTPd, but I would suggest that the most correct configuration is to configure additional options -o enable_noobj_cache -o stat_cache_expire=30 in s3fs:

-o stat_cache_expire (default is no expire)

specify expire time(seconds) for entries in the stat cache

Without this option, you'll make fewer requests to S3, but you also will not always reliably discover changes made to objects if external processes or other instances of s3fs are also modifying the objects in the bucket. The value "30" in my system was selected somewhat arbitrarily.

-o enable_noobj_cache (default is disable)

enable cache entries for the object which does not exist. s3fs always has to check whether file(or sub directory) exists under object(path) when s3fs does some command, since s3fs has recognized a directory which does not exist and has files or subdirectories under itself. It increases ListBucket request and makes performance bad. You can specify this option for performance, s3fs memorizes in stat cache that the object (file or directory) does not exist.

This option allows s3fs to remember that .ftpaccess wasn't there.

Unrelated to the performance issues that can arise with ProFTPd, which are resolved by the above changes, you also need to enable -o enable_content_md5 in s3fs.

-o enable_content_md5 (default is disable)

verifying uploaded data without multipart by content-md5 header. Enable to send "Content-MD5" header when uploading a object without multipart posting. If this option is enabled, it has some influences on a performance of s3fs when uploading small object. Because s3fs always checks MD5 when uploading large object, this option does not affect on large object.

This is an option which never should have been an option -- it should always be enabled, because not doing this bypasses a critical integrity check for only a negligible performance benefit. When an object is uploaded to S3 with a Content-MD5: header, S3 will validate the checksum and reject the object if it's corrupted in transit. However unlikely that might be, it seems short-sighted to disable this safety check.

^{Quotes are from the man page of s3fs. Grammatical errors are in the original text.}

Textarea resize control is available via the CSS3 resize property:

textarea { resize: both; } /* none|horizontal|vertical|both */
textarea.resize-vertical{ resize: vertical; }
textarea.resize-none { resize: none; }

Allowable values self-explanatory: none (disables textarea resizing), both, vertical and horizontal.

Notice that in Chrome, Firefox and Safari the default is both.

If you want to constrain the width and height of the textarea element, that's not a problem: these browsers also respect max-height, max-width, min-height, and min-width CSS properties to provide resizing within certain proportions.

Code example:

#textarea-wrapper {_x000D_
  padding: 10px;_x000D_
  background-color: #f4f4f4;_x000D_
  width: 300px;_x000D_
}_x000D_
_x000D_
#textarea-wrapper textarea {_x000D_
  min-height:50px;_x000D_
  max-height:120px;_x000D_
  width: 290px;_x000D_
}_x000D_
_x000D_
#textarea-wrapper textarea.vertical { _x000D_
  resize: vertical;_x000D_
}

<div id="textarea-wrapper">_x000D_
  <label for="resize-default">Textarea (default):</label>_x000D_
  <textarea name="resize-default" id="resize-default"></textarea>_x000D_
  _x000D_
  <label for="resize-vertical">Textarea (vertical):</label>_x000D_
  <textarea name="resize-vertical" id="resize-vertical" class="vertical">Notice this allows only vertical resize!</textarea>_x000D_
</div>

If you know in advance the number of numbers to be entered (e.g. a 4-digit PIN) you could auto-dismiss after 4 key presses, as per my answer to this similar question:

dismissing Number Pad

No need for an additional done button in this case.

To address why CMD is designed to run only one service per container, let's just realize what would happen if the secondary servers run in the same container are not trivial / auxiliary but "major" (e.g. storage bundled with the frontend app). For starters, it would break down several important containerization features such as horizontal (auto-)scaling and rescheduling between nodes, both of which assume there is only one application (source of CPU load) per container. Then there is the issue of vulnerabilities - more servers exposed in a container means more frequent patching of CVEs...

So let's admit that it is a 'nudge' from Docker (and Kubernetes/Openshift) designers towards good practices and we should not reinvent workarounds (SSH is not necessary - we have docker exec / kubectl exec / oc rsh designed to replace it).

• More info

https://devops.stackexchange.com/questions/447/why-it-is-recommended-to-run-only-one-process-in-a-container

The java instanceof operator is used to test whether the object is an instance of the specified type (class or subclass or interface).

The instanceof in java is also known as type comparison operator as it compares the instance with type. It returns either true or false. If we apply the instanceof operator with any variable that has null value, it returns false.

From JDK 14+ which includes JEP 305 we can also do "Pattern Matching" for instanceof

Patterns basically test that a value has a certain type, and can extract information from the value when it has the matching type. Pattern matching allows a more clear and efficient expression of common logic in a system, namely the conditional removal of components from objects.

Before Java 14

if (obj instanceof String) {
    String str = (String) obj; // need to declare and cast again the object
    .. str.contains(..) ..
}else{
     str = ....
}

Java 14 enhancements

if (!(obj instanceof String str)) {
    .. str.contains(..) .. // no need to declare str object again with casting
} else {
    .. str....
}

We can also combine the type check and other conditions together

if (obj instanceof String str && str.length() > 4) {.. str.contains(..) ..}

The use of pattern matching in instanceof should reduce the overall number of explicit casts in Java programs.

PS: instanceOf will only match when the object is not null, then only it can be assigned to str.

How do you iterate std::set?

int main(int argc,char *argv[]) 
{
    std::set<int> mset;
    mset.insert(1); 
    mset.insert(2);
    mset.insert(3);

    for ( auto it = mset.begin(); it != mset.end(); it++ )
        std::cout << *it;
}

Try moving the OGG source to the top. I've noticed Firefox sometimes gets confused and stops the player when the one it wants to play, OGG, isn't first.

Worth a try.

You need to use "\n" not '\n' in your gsub. The different quote marks behave differently.

Double quotes " allow character expansion and expression interpolation ie. they let you use escaped control chars like \n to represent their true value, in this case, newline, and allow the use of #{expression} so you can weave variables and, well, pretty much any ruby expression you like into the text.

While on the other hand, single quotes ' treat the string literally, so there's no expansion, replacement, interpolation or what have you.

In this particular case, it's better to use either the .delete or .tr String method to delete the newlines.

See here for more info

Since ECMAScript6, one can use Set :

var myArray = ['A', 'B', 'C'];
var mySet = new Set(myArray);
var hasB = mySet.has('B'); // true
var hasZ = mySet.has('Z'); // false

You can create a pre-filled form URL from within the Form Editor, as described in the documentation for Drive Forms. You'll end up with a URL like this, for example:

https://docs.google.com/forms/d/--form-id--/viewform?entry.726721210=Mike+Jones&entry.787184751=1975-05-09&entry.1381372492&entry.960923899

buildUrls()

In this example, question 1, "Name", has an ID of 726721210, while question 2, "Birthday" is 787184751. Questions 3 and 4 are blank.

You could generate the pre-filled URL by adapting the one provided through the UI to be a template, like this:

function buildUrls() {
  var template = "https://docs.google.com/forms/d/--form-id--/viewform?entry.726721210=##Name##&entry.787184751=##Birthday##&entry.1381372492&entry.960923899";
  var ss = SpreadsheetApp.getActive().getSheetByName("Sheet1");  // Email, Name, Birthday
  var data = ss.getDataRange().getValues();

  // Skip headers, then build URLs for each row in Sheet1.
  for (var i = 1; i < data.length; i++ ) {
    var url = template.replace('##Name##',escape(data[i][1]))
                      .replace('##Birthday##',data[i][2].yyyymmdd());  // see yyyymmdd below
    Logger.log(url);  // You could do something more useful here.
  }
};

This is effective enough - you could email the pre-filled URL to each person, and they'd have some questions already filled in.

betterBuildUrls()

Instead of creating our template using brute force, we can piece it together programmatically. This will have the advantage that we can re-use the code without needing to remember to change the template.

Each question in a form is an item. For this example, let's assume the form has only 4 questions, as you've described them. Item [0] is "Name", [1] is "Birthday", and so on.

We can create a form response, which we won't submit - instead, we'll partially complete the form, only to get the pre-filled form URL. Since the Forms API understands the data types of each item, we can avoid manipulating the string format of dates and other types, which simplifies our code somewhat.

(EDIT: There's a more general version of this in How to prefill Google form checkboxes?)

/**
 * Use Form API to generate pre-filled form URLs
 */
function betterBuildUrls() {
  var ss = SpreadsheetApp.getActive();
  var sheet = ss.getSheetByName("Sheet1");
  var data = ss.getDataRange().getValues();  // Data for pre-fill

  var formUrl = ss.getFormUrl();             // Use form attached to sheet
  var form = FormApp.openByUrl(formUrl);
  var items = form.getItems();

  // Skip headers, then build URLs for each row in Sheet1.
  for (var i = 1; i < data.length; i++ ) {
    // Create a form response object, and prefill it
    var formResponse = form.createResponse();

    // Prefill Name
    var formItem = items[0].asTextItem();
    var response = formItem.createResponse(data[i][1]);
    formResponse.withItemResponse(response);

    // Prefill Birthday
    formItem = items[1].asDateItem();
    response = formItem.createResponse(data[i][2]);
    formResponse.withItemResponse(response);

    // Get prefilled form URL
    var url = formResponse.toPrefilledUrl();
    Logger.log(url);  // You could do something more useful here.
  }
};

yymmdd Function

Any date item in the pre-filled form URL is expected to be in this format: yyyy-mm-dd. This helper function extends the Date object with a new method to handle the conversion.

When reading dates from a spreadsheet, you'll end up with a javascript Date object, as long as the format of the data is recognizable as a date. (Your example is not recognizable, so instead of May 9th 1975 you could use 5/9/1975.)

// From http://blog.justin.kelly.org.au/simple-javascript-function-to-format-the-date-as-yyyy-mm-dd/
Date.prototype.yyyymmdd = function() {
  var yyyy = this.getFullYear().toString();                                    
  var mm = (this.getMonth()+1).toString(); // getMonth() is zero-based         
  var dd  = this.getDate().toString();             

  return yyyy + '-' + (mm[1]?mm:"0"+mm[0]) + '-' + (dd[1]?dd:"0"+dd[0]);
};

:set paste is your friend I use putty and end up copying code between windows. Before I was turned on to :set paste (and :set nopaste) copy/paste gave me fits for that very reason.

pg_dump -t 'schema-name.table-name' --schema-only database-name

More info - in the manual.

You could use negative lookahead, or something like this:

^([^A]|A([^B]|B([^C]|$)|$)|$).*$

Maybe it could be simplified a bit.

If you don't care about row order (which I don't think you do), then you can use a Linux/FreeBSD/Mac OS X/Cygwin box and do:

$ cat yourfile | sort | uniq > yourfile_nodups

Then open the file again in Notepad++.

Here is an example where the things to add come from a dictionary

>>> L = [0, 0, 0, 0]
>>> things_to_add = ({'idx':1, 'amount': 1}, {'idx': 2, 'amount': 1})
>>> for item in things_to_add:
...     L[item['idx']] += item['amount']
... 
>>> L
[0, 1, 1, 0]

Here is an example adding elements from another list

>>> L = [0, 0, 0, 0]
>>> things_to_add = [0, 1, 1, 0]
>>> for idx, amount in enumerate(things_to_add):
...     L[idx] += amount
... 
>>> L
[0, 1, 1, 0]

You could also achieve the above with a list comprehension and zip

L[:] = [sum(i) for i in zip(L, things_to_add)]

Here is an example adding from a list of tuples

>>> things_to_add = [(1, 1), (2, 1)]
>>> for idx, amount in things_to_add:
...     L[idx] += amount
... 
>>> L
[0, 1, 1, 0]

You can do the same with .ix, like this:

In [1]: df = pd.DataFrame(np.random.randn(5,4), columns=list('abcd'))

In [2]: df
Out[2]: 
          a         b         c         d
0 -0.323772  0.839542  0.173414 -1.341793
1 -1.001287  0.676910  0.465536  0.229544
2  0.963484 -0.905302 -0.435821  1.934512
3  0.266113 -0.034305 -0.110272 -0.720599
4 -0.522134 -0.913792  1.862832  0.314315

In [3]: df.ix[df.a>0, ['b','c']] = 0

In [4]: df
Out[4]: 
          a         b         c         d
0 -0.323772  0.839542  0.173414 -1.341793
1 -1.001287  0.676910  0.465536  0.229544
2  0.963484  0.000000  0.000000  1.934512
3  0.266113  0.000000  0.000000 -0.720599
4 -0.522134 -0.913792  1.862832  0.314315

EDIT

After the extra information, the following will return all columns - where some condition is met - with halved values:

>> condition = df.a > 0
>> df[condition][[i for i in df.columns.values if i not in ['a']]].apply(lambda x: x/2)

I hope this helps!

This one

if [[ !  $(cat /etc/passwd | grep "sysa") ]]
Then echo " something"
exit 2
fi

Separate with commas:

http://localhost:8080/MovieDB/GetJson?name=Actor1,Actor2,Actor3&startDate=20120101&endDate=20120505

or:

http://localhost:8080/MovieDB/GetJson?name=Actor1&name=Actor2&name=Actor3&startDate=20120101&endDate=20120505

or:

http://localhost:8080/MovieDB/GetJson?name[0]=Actor1&name[1]=Actor2&name[2]=Actor3&startDate=20120101&endDate=20120505

Either way, your method signature needs to be:

@RequestMapping(value = "/GetJson", method = RequestMethod.GET) 
public void getJson(@RequestParam("name") String[] ticker, @RequestParam("startDate") String startDate, @RequestParam("endDate") String endDate) {
   //code to get results from db for those params.
 }

The constructor needs to be like a factory method and return what you want. If you need additional methods/properties, you can add them to the object before returning it.

function NotImplementedError(message) { return new Error("Not implemented", message); }

x = new NotImplementedError();

Though I'm not sure why you'd need to do this. Why not just use new Error... ? Custom exceptions don't really add much in JavaScript (or probably any untyped language).

In Expression Language you can just use the == or eq operator to compare object values. Behind the scenes they will actually use the Object#equals(). This way is done so, because until with the current EL 2.1 version you cannot invoke methods with other signatures than standard getter (and setter) methods (in the upcoming EL 2.2 it would be possible).

So the particular line

<c:when test="${lang}.equals(${pageLang})">

should be written as (note that the whole expression is inside the { and })

<c:when test="${lang == pageLang}">

or, equivalently

<c:when test="${lang eq pageLang}">

Both are behind the scenes roughly interpreted as

jspContext.findAttribute("lang").equals(jspContext.findAttribute("pageLang"))

If you want to compare constant String values, then you need to quote it

<c:when test="${lang == 'en'}">

or, equivalently

<c:when test="${lang eq 'en'}">

which is behind the scenes roughly interpreted as

jspContext.findAttribute("lang").equals("en")

You can try my package node-global-proxy which work with all node versions and most of http-client (axios, got, superagent, request etc.)

after install by

npm install node-global-proxy --save

a global proxy can start by

const proxy = require("node-global-proxy").default;

proxy.setConfig({
  http: "http://localhost:1080",
  https: "https://localhost:1080",
});
proxy.start();

/** Proxy working now! */

More information available here: https://github.com/wwwzbwcom/node-global-proxy

If you have to select the id:

 DELETE FROM table WHERE id IN (SELECT id FROM somewhere_else)

If you already know them (and they are not in the thousands):

 DELETE FROM table WHERE id IN (?,?,?,?,?,?,?,?)

If you are using Webpack 4, the answer is to use the ProvidePlugin. Their documentation specifically covers angular.js with jquery use case:

new webpack.ProvidePlugin({
  'window.jQuery': 'jquery'
});

The issue is that when using import syntax angular.js and jquery will always be imported before you have a chance to assign jquery to window.jQuery (import statements will always run first no matter where they are in the code!). This means that angular will always see window.jQuery as undefined until you use ProvidePlugin.

There is a Formula:

number_of_days - math_round_down(10 * (number_of_days / (business_days_in_a_week * days_in_a_week)))

Tada! you calculate the numbers of business day, in a month, in a week, in a whatever you want.

math_round_down () is a hypothetical method, which implements a mathematical function that rounds down.

If it is just viewing in tree view,One workaround is to use the Explorer in Notepad++ or any other tools.

if you want to fill all the column:

update 'column' set 'info' where keyID!=0;

For Bootstrap 4.x use display utilities:

w-100 d-print-block d-print-table

Usage:

<table class="table w-100 d-print-block d-print-table">

Have come across such issue. The root cause is the .m2 folder. You gotta make sure that whatever you're trying to access is present there in your .m2 folder (this is your local repo). If the stuff is there then you're good. This is usually present inside of users folder on your system (be it mac/linux or even windows)

This is how I made it work:

// Function to check and disable checkbox
function limit_checked( element, size ) {
  var bol = $( element + ':checked').length >= size;
  $(element).not(':checked').attr('disabled',bol);
}

// List of checkbox groups to check
var check_elements = [
  { id: '.group1 input[type=checkbox]', size: 2 },
  { id: '.group2 input[type=checkbox]', size: 3 },
];

// Run function for each group in list
$(check_elements).each( function(index, element) {
  // Limit checked on window load
  $(window).load( function() {
    limit_checked( element.id, element.size );
  })

  // Limit checked on click
  $(element.id).click(function() {
    limit_checked( element.id, element.size );
  });
});

Both pandas and matplotlib.dates use matplotlib.units for locating the ticks.

But while matplotlib.dates has convenient ways to set the ticks manually, pandas seems to have the focus on auto formatting so far (you can have a look at the code for date conversion and formatting in pandas).

So for the moment it seems more reasonable to use matplotlib.dates (as mentioned by @BrenBarn in his comment).

import numpy as np
import pandas as pd
import matplotlib.pyplot as plt 
import matplotlib.dates as dates

idx = pd.date_range('2011-05-01', '2011-07-01')
s = pd.Series(np.random.randn(len(idx)), index=idx)

fig, ax = plt.subplots()
ax.plot_date(idx.to_pydatetime(), s, 'v-')
ax.xaxis.set_minor_locator(dates.WeekdayLocator(byweekday=(1),
                                                interval=1))
ax.xaxis.set_minor_formatter(dates.DateFormatter('%d\n%a'))
ax.xaxis.grid(True, which="minor")
ax.yaxis.grid()
ax.xaxis.set_major_locator(dates.MonthLocator())
ax.xaxis.set_major_formatter(dates.DateFormatter('\n\n\n%b\n%Y'))
plt.tight_layout()
plt.show()

(my locale is German, so that Tuesday [Tue] becomes Dienstag [Di])

Goto Setting->Plugin->Search for "Lombok Plugin" -> It will show results. Install Lombok Plugin from the list and Restart Intellij

DT[,c:=NULL] # remove column c

Search for [ ]{2,}. This will find two or more adjacent spaces anywhere within the line. It will also match leading and trailing spaces as well as lines that consist entirely of spaces. If you don't want that, check out Alexander's answer.

Actually, you can leave out the brackets, they are just for clarity (otherwise the space character that is being repeated isn't that well visible :)).

The problem with \s{2,} is that it will also match newlines on Windows files (where newlines are denoted by CRLF or \r\n which is matched by \s{2}.

If you also want to find multiple tabs and spaces, use [ \t]{2,}.

Found this article on net, very relevant to this topic. So posting here.

ASP.NET Internals - Clearing ASP.NET Session variables

Even-though there have been a lot of great answers here, I just feel like pointing out, that nobody have put emphasis on..

It depends on the application

If you application is light on writes, as in you are reading a lot more data from the DB than you are writing. Then scaling django should be fairly trivial, heck, it comes with some fairly decent output/view caching straight out of the box. Make use of that, and say, redis as a cache provider, put a load balancer in front of it, spin up n-instances and you should be able to deal with a VERY large amount of traffic.

Now, if you have to do thousands of complex writes a second? Different story. Is Django going to be a bad choice? Well, not necessarily, depends on how you architect your solution really, and also, what your requirements are.

Just my two cents :-)

Here is another way of converting a xml to pandas data frame. For example i have parsing xml from a string but this logic holds good from reading file as well.

import pandas as pd
import xml.etree.ElementTree as ET

xml_str = '<?xml version="1.0" encoding="utf-8"?>\n<response>\n <head>\n  <code>\n   200\n  </code>\n </head>\n <body>\n  <data id="0" name="All Categories" t="2018052600" tg="1" type="category"/>\n  <data id="13" name="RealEstate.com.au [H]" t="2018052600" tg="1" type="publication"/>\n </body>\n</response>'

etree = ET.fromstring(xml_str)
dfcols = ['id', 'name']
df = pd.DataFrame(columns=dfcols)

for i in etree.iter(tag='data'):
    df = df.append(
        pd.Series([i.get('id'), i.get('name')], index=dfcols),
        ignore_index=True)

df.head()

Getting the old foreign key check state and sql mode are best way to truncate / Drop the table as Mysql Workbench do while synchronizing model to database.

SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0;
SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0;`
SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='TRADITIONAL,ALLOW_INVALID_DATES';

DROP TABLE TABLE_NAME;
TRUNCATE TABLE_NAME;

SET SQL_MODE=@OLD_SQL_MODE;
SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS;
SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS;

If you don't want to do a full page refresh, then how about wrapping what you want to refresh inside of a UpdatePanel and then do an asynchronous postback?

var q = from s in db.Serials
        group s by s.Serial_Number into g
        select new {Serial_Number = g.Key, MaxUid = g.Max(s => s.uid) }

My way of doing it:

from time import time

def printTime(start):
    end = time()
    duration = end - start
    if duration < 60:
        return "used: " + str(round(duration, 2)) + "s."
    else:
        mins = int(duration / 60)
        secs = round(duration % 60, 2)
        if mins < 60:
            return "used: " + str(mins) + "m " + str(secs) + "s."
        else:
            hours = int(duration / 3600)
            mins = mins % 60
            return "used: " + str(hours) + "h " + str(mins) + "m " + str(secs) + "s."

Set a variable as start = time() before execute the function/loops, and printTime(start) right after the block.

and you got the answer.

Scanner sc = new Scanner (System.in)
char c = sc.next().trim().charAt(0);

array_slice returns a slice of an array

$sliced_array = array_slice($array, 0, 5)

is the code you want in your case to return the first five elements

addAccordian(type, data) { console.log(type, data);

let form = this.form;

if (!form.controls[type]) {
  let ownerAccordian = new FormArray([]);
  const group = new FormGroup({});
  ownerAccordian.push(
    this.applicationService.createControlWithGroup(data, group)
  );
  form.controls[type] = ownerAccordian;
} else {
  const group = new FormGroup({});
  (<FormArray>form.get(type)).push(
    this.applicationService.createControlWithGroup(data, group)
  );
}
console.log(this.form);

}

No difference here, but it matters when you have a type that has a constructor.

struct S {
    constexpr S(int);
};

const S s0(0);
constexpr S s1(1);

s0 is a constant, but it does not promise to be initialized at compile-time. s1 is marked constexpr, so it is a constant and, because S's constructor is also marked constexpr, it will be initialized at compile-time.

Mostly this matters when initialization at runtime would be time-consuming and you want to push that work off onto the compiler, where it's also time-consuming, but doesn't slow down execution time of the compiled program

Use the left function:

QString yourString = "This is a string";
QString leftSide = yourString.left(5);
qDebug() << leftSide; // output "This "

Also have a look at mid() if you want more control.

One liner:

var yesterday = new Date(Date.now() - 864e5); // 864e5 == 86400000 == 24*60*60*1000

You can try this:

const data = {
  name : "Test",
  value: 12
}

if("name" in data){
  //Found
}
else {
  //Not found
}

You are trying to access pop as if was a list or a tupple, but pop is not. It's a method.

In my case, the API responded with a CORS error. I instead formatted the query parameters into query string. It successfully posted data and also avoided the CORS issue.

        var data = {};

        const params = new URLSearchParams({
          contact: this.ContactPerson,
          phoneNumber: this.PhoneNumber,
          email: this.Email
        }).toString();

        const url =
          "https://test.com/api/UpdateProfile?" +
          params;

        axios
          .post(url, data, {
            headers: {
              aaid: this.ID,
              token: this.Token
            }
          })
          .then(res => {
            this.Info = JSON.parse(res.data);
          })
          .catch(err => {
            console.log(err);
          });

Use this code with jQuery library, this would work perfectly fine.

$(window).bind("load", function() { 

  // your javascript event

});

Use typings to access node functions from TypeScript:

typings install env~node --global

If you don't have typings install it:

npm install typings --global

Along with the _countof() macro you can refer to the array size using pointer notation, where the array name by itself refers to the row, the indirection operator appended by the array name refers to the column.

#include <iostream>
#include <iomanip>

using namespace std;

int main()
{
    int beans[3][4]{
        { 1, 2, 3, 4 }, 
        { 5, 6, 7, 8 }, 
        { 9, 10, 11, 12 }
    };

    cout << "Row size = " << _countof(beans)  // Output row size
        << "\nColumn size = " << _countof(*beans);  // Output column size
    cout << endl;

    // Used in a for loop with a pointer.

    int(*pbeans)[4]{ beans };

    for (int i{}; i < _countof(beans); ++i) {

        cout << endl;

        for (int j{}; j < _countof(*beans); ++j) {

            cout << setw(4) << pbeans[i][j];
        }
    };

    cout << endl;
}

DPLYR makes this really easy.

x<-santa%>%
   count(Believe)

If you wanted to count by a group; for instance, how many males v females believe, just add a group_by:

x<-santa%>%
   group_by(Gender)%>%
   count(Believe)

I feel we had a related discussion earlier: How to upload preview image before upload through JavaScript

Unique ID with count information

import java.util.concurrent.atomic.AtomicLong;

public class RandomIdUtils {

    private static AtomicLong atomicCounter = new AtomicLong();

    public static String createId() {

        String currentCounter = String.valueOf(atomicCounter.getAndIncrement());
        String uniqueId = UUID.randomUUID().toString();

        return uniqueId + "-" + currentCounter;
    }
}

used !important in CSS property

<div style="color: red;">
    Hello World, How Can I Change The Color To Blue?
</div>

div {
        color: blue !important;
    }