IntelliJ IDEA "The selected directory is not a valid home for JDK"

Because you are choosing jre dir. and not JDK dir. JDK dir. is for instance (depending on update and whether it's 64 bit or 32 bit): C:\Program Files (x86)\Java\jdk1.7.0_45 In my case it's 32 bit JDK 1.7 update 45

Visual Studio Code how to resolve merge conflicts with git?

With VSCode you can find the merge conflicts easily with the following UI.

(if you do not have the topbar, set "editor.codeLens": true in User Preferences)

It indicates the current change that you have and incoming change from the server. This makes it easy to resolve the conflicts - just press the buttons above <<<< HEAD.

If you have multiple changes and want to apply all of them at once - open command palette (View -> Command Palette) and start typing merge - multiple options will appear including Merge Conflict: Accept Incoming, etc.

C# "No suitable method found to override." -- but there is one

You're not inheriting from your base class:

public class Ext : Base {
    // constructor

    public override void Draw()
    {
    }
}

AttributeError("'str' object has no attribute 'read'")

You need to open the file first. This doesn't work:

json_file = json.load('test.json')

But this works:

f = open('test.json')
json_file = json.load(f)

How do I compile jrxml to get jasper?

In eclipse,

Install Jaspersoft Studio for eclipse.
Right click the .jrxml file and select Open with JasperReports Book Editor
Open the Design tab for the .jrxml file.
On top of the window you can see the Compile Report icon.

MySQL Delete all rows from table and reset ID to zero

if you want to use truncate use this:

SET FOREIGN_KEY_CHECKS = 0; 
TRUNCATE table $table_name; 
SET FOREIGN_KEY_CHECKS = 1;

Flushing footer to bottom of the page, twitter bootstrap

Here's how to implement this from the official page:

http://getbootstrap.com/2.3.2/examples/sticky-footer.html

I just tested it right now and it WORKS GREAT! :)

HTML

<body>

    <!-- Part 1: Wrap all page content here -->
    <div id="wrap">

      <!-- Begin page content -->
      <div class="container">
        <div class="page-header">
          <h1>Sticky footer</h1>
        </div>
        <p class="lead">Pin a fixed-height footer to the bottom of the viewport in desktop browsers with this custom HTML and CSS.</p>
      </div>

      <div id="push"></div>
    </div>

    <div id="footer">
      <div class="container">
        <p class="muted credit">Example courtesy <a href="http://martinbean.co.uk">Martin Bean</a> and <a href="http://ryanfait.com/sticky-footer/">Ryan Fait</a>.</p>
      </div>
    </div>
</body>

The relevant CSS code is this:

/* Sticky footer styles
-------------------------------------------------- */
html,
body {
    height: 100%;
    /* The html and body elements cannot have any padding or margin. */
}

/* Wrapper for page content to push down footer */
#wrap {
    min-height: 100%;
    height: auto !important;
    height: 100%;
    /* Negative indent footer by it's height */
    margin: 0 auto -30px;
}

/* Set the fixed height of the footer here */
#push,
#footer {
    height: 30px;
}

#footer {
    background-color: #f5f5f5;
}

/* Lastly, apply responsive CSS fixes as necessary */
@media (max-width: 767px) {
    #footer {
        margin-left: -20px;
        margin-right: -20px;
        padding-left: 20px;
        padding-right: 20px;
    }
}

how to download image from any web page in java

You are looking for a web crawler. You can use JSoup to do this, here is basic example

How to convert 1 to true or 0 to false upon model fetch

All you need is convert string to int with + and convert the result to boolean with !!:

var response = {"isChecked":"1"};
response.isChecked = !!+response.isChecked

You can do this manipulation in the parse method:

parse: function (response) {
  response.isChecked = !!+response.isChecked;
  return response;
}

UPDATE: 7 years later, I find Number(string) conversion more elegant. Also mutating an object is not the best idea. That being said:

parse: function (response) {
  return Object.assign({}, response, {
    isChecked: !!Number(response.isChecked), // OR
    isChecked: Boolean(Number(response.isChecked))
  });
}

Using jQuery, Restricting File Size Before Uploading

I tried it this way and I am getting the results in IE*, and Mozilla 3.6.16, didnt check in older versions.

<img id="myImage" src="" style="display:none;"><br>
<button onclick="findSize();">Image Size</button>
<input type="file" id="loadfile" />
<input type="button" value="find size" onclick="findSize()" />
<script type="text/javascript">
function findSize() {
    if ( $.browser.msie ) {
       var a = document.getElementById('loadfile').value;
           $('#myImage').attr('src',a);
           var imgbytes = document.getElementById('myImage').size;
           var imgkbytes = Math.round(parseInt(imgbytes)/1024);
           alert(imgkbytes+' KB');
    }else {
           var fileInput = $("#loadfile")[0];
           var imgbytes = fileInput.files[0].fileSize; // Size returned in bytes.
           var imgkbytes = Math.round(parseInt(imgbytes)/1024);
                   alert(imgkbytes+' KB');
     }
}    
</script>

Add Jquery library also.

How do you divide each element in a list by an int?

myInt=10
myList=[tmpList/myInt for tmpList in range(10,100,10)]

JPQL SELECT between date statement

public List<Student> findStudentByReports(Date startDate, Date endDate) {
    System.out.println("call findStudentMethd******************with this pattern"
                    + startDate
                    + endDate
                    + "*********************************************");

    return em
            .createQuery(
                    "' select attendence from Attendence attendence where attendence.admissionDate BETWEEN : startDate '' AND endDate ''"
                            + "'")
            .setParameter("startDate", startDate, TemporalType.DATE)
            .setParameter("endDate", endDate, TemporalType.DATE)
            .getResultList();

}

Bind TextBox on Enter-key press

Answered here quite elegantly using attached behaviors, my preferred method for almost anything.

WPF how to make textbox lose focus after hitting enter

Check string length in PHP

[0]=> string(141) means $message is an array so you should do strlen($message[0]) < 141 ...

Why am I getting "Cannot Connect to Server - A network-related or instance-specific error"?

Xml tag arrangement in Web.config is important

First

<configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>

After

<connectionStrings>
  <add name="SqlConnectionString" connectionString="Data Source=.; Initial Catalog=TestDB; Trusted_Connection=True;" providerName="System.Data.SqlClient" />
</connectionStrings>

How to find good looking font color if background color is known?

In a recent application that I made, I used the inverted colors. With the r,g and b values in hand, just calculate (in this example, the color range varies from 0 to 255) :

r = 127-(r-127) and so on.

Are email addresses case sensitive?

I know this is an old question but I just want to comment here: To any extent email addresses ARE case sensitive, most users would be "very unwise" to actively use an email address that requires capitals. They would soon stop using the address because they'd be missing a lot of their mail. (Unless they have a specific reason to make things difficult, and they expect mail only from specific senders they know.)

That's because imperfect humans as well as imperfect software exist, (Surprise!) which will assume all email is lowercase, and for this reason these humans and software will send messages using a "lower cased version" of the address regardless of how it was provided to them. If the recipient is unable to receive such messages, it won't be long before they notice they're missing a lot, and switch to a lowercase-only email address, or get their server set up to be case-insensitive.

wget/curl large file from google drive

The default behavior of google drive is to scan files for viruses if the file is to big it will prompte the user and notifies him that the file could not be scanned.

At the moment the only workaround I found is to share the file with the web and create a web resource.

Quote from the google drive help page:

With Drive, you can make web resources — like HTML, CSS, and Javascript files — viewable as a website.

To host a webpage with Drive:

Open Drive at drive.google.com and select a file.

Click the Share button at the top of the page.

Click Advanced in the bottom right corner of the sharing box.

Click Change....

Choose On - Public on the web and click Save.

Before closing the sharing box, copy the document ID from the URL in the field below "Link to share". The document ID is a string of uppercase and lowercase letters and numbers between slashes in the URL.

Share the URL that looks like "www.googledrive.com/host/[doc id] where [doc id] is replaced by the document ID you copied in step 6.
Anyone can now view your webpage.

Found here: https://support.google.com/drive/answer/2881970?hl=en

So for example when you share a file on google drive publicly the sharelink looks like this:

https://drive.google.com/file/d/0B5IRsLTwEO6CVXFURmpQZ1Jxc0U/view?usp=sharing

Then you copy the file id and create a googledrive.com linke that look like this:

https://www.googledrive.com/host/0B5IRsLTwEO6CVXFURmpQZ1Jxc0U

How to change indentation mode in Atom?

If you are using the version 1.21.1:

Click on Packages / Settings View / Open
Select "Editor" on the left side panel
Scrool down until you see "Tab Length"
Edit the value. I like to set it to 4.

Now, just close the active tab pane and you are done.

SQL how to make null values come last when sorting ascending

USE NVL function

  select * from MyTable order by NVL(MyDate, to_date('1-1-1','DD-MM-YYYY'))

Here's the alternative of NVL in most famous DBMS

How do I reference a local image in React?

My answer is basically very similar to that of Rubzen. I use the image as the object value, btw. Two versions work for me:

{
"name": "Silver Card",
"logo": require('./golden-card.png'),

const goldenCard = require('./golden-card.png');
{ "name": "Silver Card",
"logo": goldenCard,

Without wrappers - but that is different application, too.

I have checked also "import" solution and in few cases it works (what is not surprising, that is applied in pattern App.js in React), but not in case as mine above.

Using Java to find substring of a bigger string using Regular Expression

I'd define that I want a maximum number of non-] characters between [ and ]. These need to be escaped with backslashes (and in Java, these need to be escaped again), and the definition of non-] is a character class, thus inside [ and ] (i.e. [^\\]]). The result:

FOO\\[([^\\]]+)\\]

Google Maps setCenter()

I searched and searched and finally found that ie needs to know the map size. Set the map size to match the div size.

map = new GMap2(document.getElementById("map_canvas2"), { size: new GSize(850, 600) });

<div id="map_canvas2" style="width: 850px; height: 600px">
</div>

How can I check for "undefined" in JavaScript?

If it is undefined, it will not be equal to a string that contains the characters "undefined", as the string is not undefined.

You can check the type of the variable:

if (typeof(something) != "undefined") ...

Sometimes you don't even have to check the type. If the value of the variable can't evaluate to false when it's set (for example if it's a function), then you can just evalue the variable. Example:

if (something) {
  something(param);
}

Git - push current branch shortcut

I use such alias in my .bashrc config

alias gpb='git push origin `git rev-parse --abbrev-ref HEAD`'

On the command $gpb it takes the current branch name and pushes it to the origin.

Here are my other aliases:

alias gst='git status'
alias gbr='git branch'
alias gca='git commit -am'
alias gco='git checkout'

What's "P=NP?", and why is it such a famous question?

A yes-or-no problem is in P (Polynomial time) if the answer can be computed in polynomial time.
A yes-or-no problem is in NP (Non-deterministic Polynomial time) if a yes answer can be verified in polynomial time.

Intuitively, we can see that if a problem is in P, then it is in NP. Given a potential answer for a problem in P, we can verify the answer by simply recalculating the answer.

Less obvious, and much more difficult to answer, is whether all problems in NP are in P. Does the fact that we can verify an answer in polynomial time mean that we can compute that answer in polynomial time?

There are a large number of important problems that are known to be NP-complete (basically, if any these problems are proven to be in P, then all NP problems are proven to be in P). If P = NP, then all of these problems will be proven to have an efficient (polynomial time) solution.

Most scientists believe that P!=NP. However, no proof has yet been established for either P = NP or P!=NP. If anyone provides a proof for either conjecture, they will win US $1 million.

Class method decorator with self arguments?

A more concise example might be as follows:

#/usr/bin/env python3
from functools import wraps

def wrapper(method):
    @wraps(method)
    def _impl(self, *method_args, **method_kwargs):
        method_output = method(self, *method_args, **method_kwargs)
        return method_output + "!"
    return _impl

class Foo:
    @wrapper
    def bar(self, word):
        return word

f = Foo()
result = f.bar("kitty")
print(result)

Which will print:

kitty!

How to concatenate int values in java?

The easiest (but somewhat dirty) way:

String result = "" + a + b + c + d + e

Edit: I don't recommend this and agree with Jon's comment. Adding those extra empty strings is probably the best compromise between shortness and clarity.

Testing pointers for validity (C/C++)

There are no provisions in C++ to test for the validity of a pointer as a general case. One can obviously assume that NULL (0x00000000) is bad, and various compilers and libraries like to use "special values" here and there to make debugging easier (For example, if I ever see a pointer show up as 0xCECECECE in visual studio I know I did something wrong) but the truth is that since a pointer is just an index into memory it's near impossible to tell just by looking at the pointer if it's the "right" index.

There are various tricks that you can do with dynamic_cast and RTTI such to ensure that the object pointed to is of the type that you want, but they all require that you are pointing to something valid in the first place.

If you want to ensure that you program can detect "invalid" pointers then my advice is this: Set every pointer you declare either to NULL or a valid address immediately upon creation and set it to NULL immediately after freeing the memory that it points to. If you are diligent about this practice, then checking for NULL is all you ever need.

Best way to use multiple SSH private keys on one client

Multiple key pairs on GitHub

1.0 SSH configuration file

1.1 Create ~/.ssh/config

1.2 chmod 600 ~/.ssh/config (must)

1.3 Input the following into the file:

Host pizza

HostName github.com

PreferredAuthentications publickey # optional

IdentityFile ~/.ssh/privatekey1

Case A: Fresh new Git clone

Use this command to Git clone:

$ git clone git@pizza:yourgitusername/pizzahut_repo.git

Note: If you want to change the host name “pizza” of .ssh/config in the future, go into the Git cloned folder, edit .git/config file URL line (see case B)

Case B: Already have Git clone folder

2.1 Go to the cloned folder, and then go into the .git folder

2.2 Edit configuration file

2.3 Update the URL from *old to new:

(Old) URL = [email protected]:yourgitusername/pizzahut_repo.git

(New) URL = git@pizza:yourgitusername/pizzahut_repo.git

In practice, what are the main uses for the new "yield from" syntax in Python 3.3?

Simply put, yield from provides tail recursion for iterator functions.

How to pass extra variables in URL with WordPress

One issue you might run into is is_home() returns true when a registered query_var is present in the home URL. For example, if http://example.com displays a static page instead of the blog, http://example.com/?c=123 will return the blog.

See https://core.trac.wordpress.org/ticket/25143 and https://wordpress.org/support/topic/adding-query-var-makes-front-page-missing/ for more info on this.

What you can do (if you're not attempting to affect the query) is use add_rewrite_endpoint(). It should be run during the init action as it affects the rewrite rules. Eg.

add_action( 'init', 'add_custom_setcookie_rewrite_endpoints' );

function add_custom_setcookie_rewrite_endpoints() {
    //add ?c=123 endpoint with
    //EP_ALL so endpoint is present across all places
    //no effect on the query vars
    add_rewrite_endpoint( 'c', EP_ALL, $query_vars = false );
}

This should give you access to $_GET['c'] when the url contains more information like www.example.com/news?c=123.

Remember to flush your rewrite rules after adding/modifying this.

How to reference Microsoft.Office.Interop.Excel dll?

Building off of Mulfix's answer, if you have Visual Studio Community 2015, try Add Reference... -> COM -> Type Libraries -> 'Microsoft Excel 15.0 Object Library'.

Is there an embeddable Webkit component for Windows / C# development?

try this one http://code.google.com/p/geckofx/ hope it ain't dupe or this one i think is better http://webkitdotnet.sourceforge.net/

ValueError : I/O operation on closed file

I had this problem when I was using an undefined variable inside the with open(...) as f:. I removed (or I defined outside) the undefined variable and the problem disappeared.

Should I URL-encode POST data?

@DougW has clearly answered this question, but I still like to add some codes here to explain Doug's points. (And correct errors in the code above)

Solution 1: URL-encode the POST data with a content-type header :application/x-www-form-urlencoded .

Note: you do not need to urlencode $_POST[] fields one by one, http_build_query() function can do the urlencoding job nicely.

$fields = array(
    'mediaupload'=>$file_field,
    'username'=>$_POST["username"],
    'password'=>$_POST["password"],
    'latitude'=>$_POST["latitude"],
    'longitude'=>$_POST["longitude"],
    'datetime'=>$_POST["datetime"],
    'category'=>$_POST["category"],
    'metacategory'=>$_POST["metacategory"],
    'caption'=>$_POST["description"]
);

$fields_string = http_build_query($fields);

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_POST,1);
curl_setopt($ch, CURLOPT_POSTFIELDS,$fields_string);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$response = curl_exec($ch);

Solution 2: Pass the array directly as the post data without URL-encoding, while the Content-Type header will be set to multipart/form-data.

$fields = array(
        'mediaupload'=>$file_field,
        'username'=>$_POST["username"],
        'password'=>$_POST["password"],
        'latitude'=>$_POST["latitude"],
        'longitude'=>$_POST["longitude"],
        'datetime'=>$_POST["datetime"],
        'category'=>$_POST["category"],
        'metacategory'=>$_POST["metacategory"],
        'caption'=>$_POST["description"]
    );

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL,$url);
    curl_setopt($ch, CURLOPT_POST,1);
    curl_setopt($ch, CURLOPT_POSTFIELDS,$fields);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    $response = curl_exec($ch);

Both code snippets work, but using different HTTP headers and bodies.

LINQ to SQL: Multiple joins ON multiple Columns. Is this possible?

You can also join if the number of columns are not same in both tables and can map static value to table column

from t1 in Table1 
join t2 in Table2 
on new {X = t1.Column1, Y = 0 } on new {X = t2.Column1, Y = t2.Column2 }
select new {t1, t2}

How can I use UserDefaults in Swift?

Swift 4 :

Store

    UserDefaults.standard.set(object/value, forKey: "key_name")

Retrive

    var returnValue: [datatype]? = UserDefaults.standard.object(forKey: "key_name") as? [datatype]

Remove

    UserDefaults.standard.removeObject(forKey:"key_name")

Set height of chart in Chart.js

If you disable the maintain aspect ratio in options then it uses the available height:

var chart = new Chart('blabla', {
                type: 'bar',
                data: {
                },
                options: {
                    maintainAspectRatio: false,
                }
            });

Show only two digit after decimal

I think the best and simplest solution is (KISS):

double i = 348842;
double i2 = i/60000;
float k = (float) Math.round(i2 * 100) / 100;

When adding a Javascript library, Chrome complains about a missing source map, why?

This is what worked for me: instead of

<script src="https://cdn.jsdelivr.net/npm/@tensorflow/tfjs"></script>

try

<script src="https://cdn.jsdelivr.net/npm/@tensorflow/tfjs/dist/tf.min.js"> </script>

After that change I am not seeing the error anymore.

Send mail via Gmail with PowerShell V2's Send-MailMessage

I just had the same problem and ran into this post. It actually helped me to get it running with the native Send-MailMessage command-let and here is my code:

$cred = Get-Credential
Send-MailMessage ....... -SmtpServer "smtp.gmail.com" -UseSsl -Credential $cred -Port 587

However, in order to have Gmail allowing me to use the SMTP server, I had to log in into my Gmail account and under this link https://www.google.com/settings/security set the "Access for less secure apps" to "Enabled". Then finally it did work!!

How can I programmatically determine if my app is running in the iphone simulator?

Already asked, but with a very different title.

What #defines are set up by Xcode when compiling for iPhone

I'll repeat my answer from there:

It's in the SDK docs under "Compiling source code conditionally"

The relevant definition is TARGET_OS_SIMULATOR, which is defined in /usr/include/TargetConditionals.h within the iOS framework. On earlier versions of the toolchain, you had to write:

#include "TargetConditionals.h"

but this is no longer necessary on the current (Xcode 6/iOS8) toolchain.

So, for example, if you want to check that you are running on device, you should do

#if TARGET_OS_SIMULATOR
    // Simulator-specific code
#else
    // Device-specific code
#endif

depending on which is appropriate for your use-case.

What is Model in ModelAndView from Spring MVC?

Here in this case, we are having 3 parameter's in the Method namely ModelandView.
According to this question, the first parameter is easily understood. It represents the View which will be displayed to the client.
The other two parameters are just like The Pointer and The Holder
Hence you can sum it up like this

ModelAndView(View, Pointer, Holder);

The Pointer just points the information in the The Holder

When the Controller binds the View with this information, then in the said process, you can use The Pointer in the JSP page to access the information stored in The Holder to display that respected information to the client.
Here is the visual depiction of the respected process.

return new ModelAndView("welcomePage", "WelcomeMessage", message);

jQuery - how to write 'if not equal to' (opposite of ==)

!=

For example,

if ("apple" != "orange")
  // true, the string "apple" is not equal to the string "orange"

Means not. See also the logical operators list. Also, when you see triple characters, it's a type sensitive comparison. (e.g. if (1 === '1') [not equal])

Can't change z-index with JQuery

$(this).parent().css('z-index',3000);

SQL: How to perform string does not equal

The strcomp function may be appropriate here (returns 0 when strings are identical):

 SELECT * from table WHERE Strcmp(user, testername) <> 0;

How to save a data frame as CSV to a user selected location using tcltk

write.csv([enter name of dataframe here],file = file.choose(new = T))

After running above script this window will open :

Type the new file name with extension in the File name field and click Open, it'll ask you to create a new file to which you should select Yes and the file will be created and saved in the desired location.

Exact time measurement for performance testing

A better way is to use the Stopwatch class:

using System.Diagnostics;
// ...

Stopwatch sw = new Stopwatch();

sw.Start();

// ...

sw.Stop();

Console.WriteLine("Elapsed={0}",sw.Elapsed);

jQuery.ajax returns 400 Bad Request

Be sure and use 'get' or 'post' consistantly with your $.ajax call for example.

$.ajax({
    type: 'get',

must be met with

app.get('/', function(req, res) {

=============== and for post

$.ajax({
    type: 'post',

must be met with

app.post('/', function(req, res) {

How do I use a char as the case in a switch-case?

charAt gets a character from a string, and you can switch on them since char is an integer type.

So to switch on the first char in the String hello,

switch (hello.charAt(0)) {
  case 'a': ... break;
}

You should be aware though that Java chars do not correspond one-to-one with code-points. See codePointAt for a way to reliably get a single Unicode codepoints.

UILabel Align Text to center

Here is a sample code showing how to align text using UILabel:

label = [[UILabel alloc] initWithFrame:CGRectMake(60, 30, 200, 12)];
label.textAlignment = NSTextAlignmentCenter;

You can read more about it here UILabel

String Comparison in Java

If you check which string would come first in a lexicon, you've done a lexicographical comparison of the strings!

Some links:

Stolen from the latter link:

A string s precedes a string t in lexicographic order if

s is a prefix of t, or

if c and d are respectively the first character of s and t in which s and t differ, then c precedes d in character order.

Note: For the characters that are alphabetical letters, the character order coincides with the alphabetical order. Digits precede letters, and uppercase letters precede lowercase ones.

Example:

house precedes household

Household precedes house

composer precedes computer

H2O precedes HOTEL

The easiest way to transform collection to array?

Here's the final solution for the case in update section (with the help of Google Collections):

Collections2.transform (fooCollection, new Function<Foo, Bar>() {
    public Bar apply (Foo foo) {
        return new Bar (foo);
    }
}).toArray (new Bar[fooCollection.size()]);

But, the key approach here was mentioned in the doublep's answer (I forgot for toArray method).

How to send a HTTP OPTIONS request from the command line?

The curl installed by default in Debian supports HTTPS since a great while back. (a long time ago there were two separate packages, one with and one without SSL but that's not the case anymore)

OPTIONS /path

You can send an OPTIONS request with curl like this:

curl -i -X OPTIONS http://example.org/path

You may also use -v instead of -i to see more output.

OPTIONS *

To send a plain * (instead of the path, see RFC 7231) with the OPTIONS method, you need curl 7.55.0 or later as then you can run a command line like:

curl -i --request-target "*" -X OPTIONS http://example.org

Creating a Shopping Cart using only HTML/JavaScript

For a project this size, you should stop writing pure JavaScript and turn to some of the libraries available. I'd recommend jQuery (http://jquery.com/), which allows you to select elements by css-selectors, which I recon should speed up your development quite a bit.

Example of your code then becomes;

function AddtoCart() {
  var len = $("#Items tr").length, $row, $inp1, $inp2, $cells;

  $row = $("#Items td:first").clone(true);
  $cells = $row.find("td");

  $cells.get(0).html( len );

  $inp1 = $cells.get(1).find("input:first");
  $inp1.attr("id", $inp1.attr("id") + len).val("");

  $inp2 = $cells.get(2).find("input:first");
  $inp2.attr("id", $inp2.attr("id") + len).val("");

  $("#Items").append($row);
    }

I can see that you might not understand that code yet, but take a look at jQuery, it's easy to learn and will make this development way faster.

I would use the libraries already created specifically for js shopping carts if I were you though.

To your problem; If i look at your jsFiddle, it doesn't even seem like you have defined a table with the id Items? Maybe that's why it doesn't work?

Failed to connect to 127.0.0.1:27017, reason: errno:111 Connection refused

I solved that simply by entering sudo mongo after mongod command.

jQuery.post( ) .done( ) and success:

From the doc:

jqXHR.done(function( data, textStatus, jqXHR ) {});

An alternative construct to the success callback option, the .done() method replaces the deprecated jqXHR.success() method. Refer to deferred.done() for implementation details.

The point it is just an alternative for success callback option, and jqXHR.success() is deprecated.

Minimum and maximum date

From the spec, §15.9.1.1:

A Date object contains a Number indicating a particular instant in time to within a millisecond. Such a Number is called a time value. A time value may also be NaN, indicating that the Date object does not represent a specific instant of time.

Time is measured in ECMAScript in milliseconds since 01 January, 1970 UTC. In time values leap seconds are ignored. It is assumed that there are exactly 86,400,000 milliseconds per day. ECMAScript Number values can represent all integers from –9,007,199,254,740,992 to 9,007,199,254,740,992; this range suffices to measure times to millisecond precision for any instant that is within approximately 285,616 years, either forward or backward, from 01 January, 1970 UTC.

The actual range of times supported by ECMAScript Date objects is slightly smaller: exactly –100,000,000 days to 100,000,000 days measured relative to midnight at the beginning of 01 January, 1970 UTC. This gives a range of 8,640,000,000,000,000 milliseconds to either side of 01 January, 1970 UTC.

The exact moment of midnight at the beginning of 01 January, 1970 UTC is represented by the value +0.

The third paragraph being the most relevant. Based on that paragraph, we can get the precise earliest date per spec from new Date(-8640000000000000), which is Tuesday, April 20th, 271,821 BCE (BCE = Before Common Era, e.g., the year -271,821).

Android background music service

Do it without service

https://web.archive.org/web/20181116173307/http://www.rbgrn.net/content/307-light-racer-20-days-61-64-completion

If you are so serious about doing it with services using mediaplayer

Intent svc=new Intent(this, BackgroundSoundService.class);
startService(svc);

public class BackgroundSoundService extends Service {
    private static final String TAG = null;
    MediaPlayer player;
    public IBinder onBind(Intent arg0) {

        return null;
    }
    @Override
    public void onCreate() {
        super.onCreate();
        player = MediaPlayer.create(this, R.raw.idil);
        player.setLooping(true); // Set looping
        player.setVolume(100,100);

    }
    public int onStartCommand(Intent intent, int flags, int startId) {
        player.start();
        return 1;
    }

    public void onStart(Intent intent, int startId) {
        // TO DO
    }
    public IBinder onUnBind(Intent arg0) {
        // TO DO Auto-generated method
        return null;
    }

    public void onStop() {

    }
    public void onPause() {

    }
    @Override
    public void onDestroy() {
        player.stop();
        player.release();
    }

    @Override
    public void onLowMemory() {

    }
}

Please call this service in Manifest Make sure there is no space at the end of the .BackgroundSoundService string

<service android:enabled="true" android:name=".BackgroundSoundService" />

MySQL CREATE FUNCTION Syntax

You have to override your ; delimiter with something like $$ to avoid this kind of error.

After your function definition, you can set the delimiter back to ;.

This should work:

DELIMITER $$
CREATE FUNCTION F_Dist3D (x1 decimal, y1 decimal) 
RETURNS decimal
DETERMINISTIC
BEGIN 
  DECLARE dist decimal;
  SET dist = SQRT(x1 - y1);
  RETURN dist;
END$$
DELIMITER ;

How to get the timezone offset in GMT(Like GMT+7:00) from android device?

This is how Google recommends getting TimezoneOffset.

Calendar calendar = Calendar.getInstance(Locale.getDefault());
int offset = -(calendar.get(Calendar.ZONE_OFFSET) + calendar.get(Calendar.DST_OFFSET)) / (60 * 1000)

https://developer.android.com/reference/java/util/Date#getTimezoneOffset()

Changing width property of a :before css selector using JQuery

Pseudo-elements are not part of the DOM, so they can't be manipulated using jQuery or Javascript.

But as pointed out in the accepted answer, you can use the JS to append a style block which ends of styling the pseudo-elements.

How to resolve /var/www copy/write permission denied?

Encountered a similar problem today. Did not see my fix listed here, so I thought I'd share.

Root could not erase a file.

I did my research. Turns out there's something called an immutable bit.

# lsattr /path/file
----i-------- /path/file
#

This bit being configured prevents even root from modifying/removing it.

To remove this I did:

# chattr -i /path/file

After that I could rm the file.

In reverse, it's a neat trick to know if you have something you want to keep from being gone.

Error retrieving parent for item: No resource found that matches the given name after upgrading to AppCompat v23

This happens because after updates Android Studio uses API version 23 by default.

The following worked for me:

Press Ctrl + Shift + Alt + S to get to the project structure page. Go to the properties tab and change 23.0.0 to 22.0.1 (or equivalent to what you were using earlier) in the build tool area and rebuild your project.

If that doesn't work, go to gradle:app and then

compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:22.2.1'

Edit v7:23.0.0 to v7:22.2.1 as shown above and sync gradle. This will definitely work.

How to convert a Title to a URL slug in jQuery?

function slugify(content) {
   return content.toLowerCase().replace(/ /g,'-').replace(/[^\w-]+/g,'');
}
// slugify('Hello World');
// this will return 'hello-world';

this works for me fine.

Found it on CodeSnipper

git repo says it's up-to-date after pull but files are not updated

For me my forked branch was not in sync with the master branch. So I went to bitbucket and synced and merged my forked branch and then tried to take the pull. Then it worked fine.

How to display HTML tags as plain text

As many others have said, htmlentities() will do the trick... but it will look like shit.

Wrap it up with a <pre> tag and you'll preserve your indentation.

echo '<pre>';
echo htmlspecialchars($YOUR_HTML);
echo '</pre>';

What is the opposite of evt.preventDefault();

This is not a direct answer for the question but it may help someone. My point is you only call preventDefault() based on some conditions as there is no point of having an event if you call preventDefault() for all the cases. So having if conditions and calling preventDefault() only when the condition/s satisfied will work the function in usual way for the other cases.

$('.btnEdit').click(function(e) {

   var status = $(this).closest('tr').find('td').eq(3).html().trim();
   var tripId = $(this).attr('tripId');

  if (status == 'Completed') {

     e.preventDefault();
     alert("You can't edit completed reservations");

 } else if (tripId != '') {

    e.preventDefault();
    alert("You can't edit a reservation which is already attached to a trip");
 }
 //else it will continue as usual

});

What is the proper declaration of main in C++?

Details on return values and their meaning

Per 3.6.1 ([basic.start.main]):

A return statement in main has the effect of leaving the main function (destroying any objects with automatic storage duration) and calling std::exit with the return value as the argument. If control reaches the end of main without encountering a return statement, the effect is that of executing
return 0;

The behavior of std::exit is detailed in section 18.5 ([support.start.term]), and describes the status code:

Finally, control is returned to the host environment. If status is zero or EXIT_SUCCESS, an implementation-defined form of the status successful termination is returned. If status is EXIT_FAILURE, an implementation-defined form of the status unsuccessful termination is returned. Otherwise the status returned is implementation-defined.

Conversion failed when converting date and/or time from character string in SQL SERVER 2008

Seems like last_accessed_on, is a date time, and you are converting '23-07-2014 09:37:00' to a varchar. This would not work, and give you conversion errors. Try

last_accessed_on= convert(datetime,'23-07-2014 09:37:00', 103)

I think you can avoid the cast though, and update with '23-07-2014 09:37:00'. It should work given that the format is correct.

Your query is not going to work because in last_accessed_on (which is DateTime2 type), you are trying to pass a Varchar value.

You query would be

UPDATE  student_queues SET  Deleted=0 ,  last_accessed_by='raja', last_accessed_on=convert(datetime,'23-07-2014 09:37:00', 103)  
 WHERE std_id IN ('2144-384-11564') AND reject_details='REJECT'

I can't install pyaudio on Windows? How to solve "error: Microsoft Visual C++ 14.0 is required."?

The problem is pyaudio does not have wheels for python 3.7 just try some lower version like 3.6 then install pyaudio

It works

jQuery click function doesn't work after ajax call?

Since the class is added dynamically, you need to use event delegation to register the event handler like:

$('#LangTable').on('click', '.deletelanguage', function(event) {
    event.preventDefault();
    alert("success");
});

This will attach your event to any anchors within the #LangTable element, reducing the scope of having to check the whole document element tree and increasing efficiency.

FIDDLE DEMO

How to find list of possible words from a letter matrix [Boggle Solver]

My answer works like the others here, but I'll post it because it looks a bit faster than the other Python solutions, from setting up the dictionary faster. (I checked this against John Fouhy's solution.) After setup, the time to solve is down in the noise.

grid = "fxie amlo ewbx astu".split()
nrows, ncols = len(grid), len(grid[0])

# A dictionary word that could be a solution must use only the grid's
# letters and have length >= 3. (With a case-insensitive match.)
import re
alphabet = ''.join(set(''.join(grid)))
bogglable = re.compile('[' + alphabet + ']{3,}$', re.I).match

words = set(word.rstrip('\n') for word in open('words') if bogglable(word))
prefixes = set(word[:i] for word in words
               for i in range(2, len(word)+1))

def solve():
    for y, row in enumerate(grid):
        for x, letter in enumerate(row):
            for result in extending(letter, ((x, y),)):
                yield result

def extending(prefix, path):
    if prefix in words:
        yield (prefix, path)
    for (nx, ny) in neighbors(path[-1]):
        if (nx, ny) not in path:
            prefix1 = prefix + grid[ny][nx]
            if prefix1 in prefixes:
                for result in extending(prefix1, path + ((nx, ny),)):
                    yield result

def neighbors((x, y)):
    for nx in range(max(0, x-1), min(x+2, ncols)):
        for ny in range(max(0, y-1), min(y+2, nrows)):
            yield (nx, ny)

Sample usage:

# Print a maximal-length word and its path:
print max(solve(), key=lambda (word, path): len(word))

Edit: Filter out words less than 3 letters long.

Edit 2: I was curious why Kent Fredric's Perl solution was faster; it turns out to use regular-expression matching instead of a set of characters. Doing the same in Python about doubles the speed.

what is the differences between sql server authentication and windows authentication..?

SQL Server has its own built in system for security that covers logins and roles. This is separate and parallel to Windows users and groups. You can use just SQL security and then all administration will occur within SQL server and there's no connection between those logins and the Windows users. If you use mixed mode then Windows users are treated just like SQL logins.

There are a number of features of each approach -

1) If you want to use connection pooling you have to use SQL logins, or all share the same windows user - not a good idea.

2) If you want to track what a particular user is doing, then using the windows authentication makes sense.

3) Using the windows tools to administer users is much more powerful than SQL, but the link between the two is tenuous, for instance if you remove a windows user then the related data within SQL isn't updated.

Facebook Like-Button - hide count?

Just encompass the iframe in a div set the width to the width of button, set overflow to hidden i.e.

  <div style="width:52px;overflow:hidden;">
      <fb:like layout="button_count"></fb:like>

      <div id="fb-root"></div>
          <script>
              window.fbAsyncInit = function() {
                  FB.init({
                    appId: 'YOUR_APP_ID',
                    status: true,
                    cookie: true,
                    xfbml: true
                  });
              };
              (function() {
                  var e = document.createElement('script');
                  e.type = 'text/javascript';
                  e.src = document.location.protocol +
                  '//connect.facebook.net/en_US/all.js';
                  e.async = true;
                  document.getElementById('fb-root').appendChild(e);
              }());
          </script>
      </div>

How to set my phpmyadmin user session to not time out so quickly?

To increase the phpMyAdmin Session Timeout, open config.inc.php in the root phpMyAdmin directory and add this setting (anywhere).

$cfg['LoginCookieValidity'] = <your_new_timeout>;

Where <your_new_timeout> is some number larger than 1800.

Note:

Always keep on mind that a short cookie lifetime is all well and good for the development server. So do not do this on your production server.

mat-form-field must contain a MatFormFieldControl

Note Some time Error occurs, when we use "mat-form-field" tag around submit button like:

<mat-form-field class="example-full-width">
   <button mat-raised-button type="submit" color="primary">  Login</button>
   </mat-form-field>

So kindly don't use this tag around submit button

JavaScript for handling Tab Key press

Given this piece of HTML code:

<a href='https://facebook.com/'>Facebook</a>
<a href='https://google.ca/'>Google</a>
<input type='text' placeholder='an input box'>

We can use this JavaScript:

function checkTabPress(e) {
    'use strict';
    var ele = document.activeElement;

    if (e.keyCode === 9 && ele.nodeName.toLowerCase() === 'a') {
        console.log(ele.href);
    }
}

document.addEventListener('keyup', function (e) {
    checkTabPress(e);
}, false);

I have bound an event listener to the document element for the keyUp event, which triggers a function to check if the Tab key was pressed (or technically, released).

The function checks the currently focused element and whether the NodeName is a. If so, it enters the if block and, in my case, writes the value of the href property to the JavaScript console.

Here's a jsFiddle

SwiftUI - How do I change the background color of a View?

NavigationView Example:

var body: some View {
    var body: some View {
        NavigationView {
            ZStack {
                // Background
                Color.blue.edgesIgnoringSafeArea(.all)

                content
            }
            //.navigationTitle(Constants.navigationTitle)
            //.navigationBarItems(leading: cancelButton, trailing: doneButton)
            //.navigationViewStyle(StackNavigationViewStyle())
        }
    }
}

var content: some View {
    // your content here; List, VStack etc - whatever you want
    VStack {
       Text("Hello World")
    }
}

How to get the next auto-increment id in mysql

using the answer of ravi404:

CREATE FUNCTION `getAutoincrementalNextVal`(`TableName` VARCHAR(50))
    RETURNS BIGINT
    LANGUAGE SQL
    NOT DETERMINISTIC
    CONTAINS SQL
    SQL SECURITY DEFINER
    COMMENT ''
BEGIN

    DECLARE Value BIGINT;

    SELECT
        AUTO_INCREMENT INTO Value
    FROM
        information_schema.tables
    WHERE
        table_name = TableName AND
        table_schema = DATABASE();

    RETURN Value;

END

using in your insert query, to create a SHA1 Hash. ex.:

INSERT INTO
    document (Code, Title, Body)
VALUES (                
    sha1( getAutoincrementalNextval ('document') ),
    'Title',
    'Body'
);

Google Maps API v3 marker with label

the above solutions wont work on ipad-2

recently I had an safari browser crash issue while plotting the markers even if there are less number of markers. Initially I was using marker with label (markerwithlabel.js) library for plotting the marker , when i use google native marker it was working fine even with large number of markers but i want customized markers , so i refer the above solution given by jonathan but still the crashing issue is not resolved after doing lot of research i came to know about http://nickjohnson.com/b/google-maps-v3-how-to-quickly-add-many-markers this blog and now my map search is working smoothly on ipad-2 :)

How to convert dataframe into time series?

Input. We will start with the text of the input shown in the question since the question did not provide the csv input:

Lines <- "Dates   Bajaj_close Hero_close
3/14/2013   1854.8  1669.1
3/15/2013   1850.3  1684.45
3/18/2013   1812.1  1690.5
3/19/2013   1835.9  1645.6
3/20/2013   1840    1651.15
3/21/2013   1755.3  1623.3
3/22/2013   1820.65 1659.6
3/25/2013   1802.5  1617.7
3/26/2013   1801.25 1571.85
3/28/2013   1799.55 1542"

zoo. "ts" class series normally do not represent date indexes but we can create a zoo series that does (see zoo package):

library(zoo)
z <- read.zoo(text = Lines, header = TRUE, format = "%m/%d/%Y")

Alternately, if you have already read this into a data frame DF then it could be converted to zoo as shown on the second line below:

DF <- read.table(text = Lines, header = TRUE)
z <- read.zoo(DF, format = "%m/%d/%Y")

In either case above z ia a zoo series with a "Date" class time index. One could also create the zoo series, zz, which uses 1, 2, 3, ... as the time index:

zz <- z
time(zz) <- seq_along(time(zz))

ts. Either of these could be converted to a "ts" class series:

as.ts(z)
as.ts(zz)

The first has a time index which is the number of days since the Epoch (January 1, 1970) and will have NAs for missing days and the second will have 1, 2, 3, ... as the time index and no NAs.

Monthly series. Typically "ts" series are used for monthly, quarterly or yearly series. Thus if we were to aggregate the input into months we could reasonably represent it as a "ts" series:

z.m <- as.zooreg(aggregate(z, as.yearmon, mean), freq = 12)
as.ts(z.m)

Exit single-user mode

I tried this is working

ALTER DATABASE dbName SET MULTI_USER WITH ROLLBACK IMMEDIATE

How can I list all foreign keys referencing a given table in SQL Server?

I have been using this on 2008 and up. It's similar to some other solutions listed but, the field names are proper cased to handle case specific (LatBin) collations. Additionally, you can feed it a single table name and retrieve just the info for that table.

-->>SPECIFY THE DESIRED DB
USE ???
GO

/*********************************************************************************************

    LIST OUT ALL PRIMARY AND FOREIGN KEY CONSTRAINTS IN A DB OR FOR A SPECIFIED TABLE

*********************************************************************************************/
DECLARE @tblName VARCHAR(255) 

/*******************/

    SET @tblName = NULL-->NULL will return all PK/FK constraints for every table in the database

/*******************/

SELECT PKTABLE_QUALIFIER = CONVERT(SYSNAME,DB_NAME()), 
       PKTABLE_OWNER = CONVERT(SYSNAME,SCHEMA_NAME(O1.schema_id)), 
       PKTABLE_NAME = CONVERT(SYSNAME,O1.name), 
       PKCOLUMN_NAME = CONVERT(SYSNAME,C1.name), 
       FKTABLE_QUALIFIER = CONVERT(SYSNAME,DB_NAME()), 
       FKTABLE_OWNER = CONVERT(SYSNAME,SCHEMA_NAME(O2.schema_id)), 
       FKTABLE_NAME = CONVERT(SYSNAME,O2.name), 
       FKCOLUMN_NAME = CONVERT(SYSNAME,C2.name), 
       -- Force the column to be non-nullable (see SQL BU 325751) 
       KEY_SEQ             = isnull(convert(smallint,K.constraint_column_id),0), 
       UPDATE_RULE = CONVERT(SMALLINT,CASE OBJECTPROPERTY(F.object_id,'CnstIsUpdateCascade')  
                                        WHEN 1 THEN 0 
                                        ELSE 1 
                                      END), 
       DELETE_RULE = CONVERT(SMALLINT,CASE OBJECTPROPERTY(F.object_id,'CnstIsDeleteCascade')  
                                        WHEN 1 THEN 0 
                                        ELSE 1 
                                      END), 
       FK_NAME = CONVERT(SYSNAME,OBJECT_NAME(F.object_id)), 
       PK_NAME = CONVERT(SYSNAME,I.name), 
       DEFERRABILITY = CONVERT(SMALLINT,7)   -- SQL_NOT_DEFERRABLE 
FROM   sys.all_objects O1, 
       sys.all_objects O2, 
       sys.all_columns C1, 
       sys.all_columns C2, 
       sys.foreign_keys F 
       INNER JOIN sys.foreign_key_columns K 
         ON (K.constraint_object_id = F.object_id) 
       INNER JOIN sys.indexes I 
         ON (F.referenced_object_id = I.object_id 
             AND F.key_index_id = I.index_id) 
WHERE  O1.object_id = F.referenced_object_id 
       AND O2.object_id = F.parent_object_id 
       AND C1.object_id = F.referenced_object_id 
       AND C2.object_id = F.parent_object_id 
       AND C1.column_id = K.referenced_column_id
       AND C2.column_id = K.parent_column_id
       AND (   O1.name = @tblName 
            OR O2.name = @tblName
            OR @tblName IS null)
ORDER BY PKTABLE_NAME,FKTABLE_NAME

EOFError: EOF when reading a line

**The best is to use try except block to get rid of EOF **

try:
    width = input()
    height = input()
    def rectanglePerimeter(width, height):
       return ((width + height)*2)
    print(rectanglePerimeter(width, height))
except EOFError as e:
    print(end="")

jquery mobile background image

Override ui-page class in your css:

.ui-page {
    background: url("image.gif");
    background-repeat: repeat;
}

Handling the window closing event with WPF / MVVM Light Toolkit

I would be tempted to use an event handler within your App.xaml.cs file that will allow you to decide on whether to close the application or not.

For example you could then have something like the following code in your App.xaml.cs file:

protected override void OnStartup(StartupEventArgs e)
{
    base.OnStartup(e);
    // Create the ViewModel to attach the window to
    MainWindow window = new MainWindow();
    var viewModel = new MainWindowViewModel();

    // Create the handler that will allow the window to close when the viewModel asks.
    EventHandler handler = null;
    handler = delegate
    {
        //***Code here to decide on closing the application****
        //***returns resultClose which is true if we want to close***
        if(resultClose == true)
        {
            viewModel.RequestClose -= handler;
            window.Close();
        }
    }
    viewModel.RequestClose += handler;

    window.DataContaxt = viewModel;

    window.Show();

}

Then within your MainWindowViewModel code you could have the following:

#region Fields
RelayCommand closeCommand;
#endregion

#region CloseCommand
/// <summary>
/// Returns the command that, when invoked, attempts
/// to remove this workspace from the user interface.
/// </summary>
public ICommand CloseCommand
{
    get
    {
        if (closeCommand == null)
            closeCommand = new RelayCommand(param => this.OnRequestClose());

        return closeCommand;
    }
}
#endregion // CloseCommand

#region RequestClose [event]

/// <summary>
/// Raised when this workspace should be removed from the UI.
/// </summary>
public event EventHandler RequestClose;

/// <summary>
/// If requested to close and a RequestClose delegate has been set then call it.
/// </summary>
void OnRequestClose()
{
    EventHandler handler = this.RequestClose;
    if (handler != null)
    {
        handler(this, EventArgs.Empty);
    }
}

#endregion // RequestClose [event]

Limit results in jQuery UI Autocomplete

Same like "Jayantha" said using css would be the easiest approach, but this might be better,

.ui-autocomplete { max-height: 200px; overflow-y: scroll; overflow-x: hidden;}

Note the only difference is "max-height". this will allow the widget to resize to smaller height but not more than 200px

cannot import name patterns

You don't need those imports. The only thing you need in your urls.py (to start) is:

from django.conf.urls.defaults import *

# This two if you want to enable the Django Admin: (recommended)
from django.contrib import admin
admin.autodiscover()

urlpatterns = patterns('',
    url(r'^admin/', include(admin.site.urls)),
    # ... your url patterns
)

NOTE: This solution was intended for Django <1.6. This was actually the code generated by Django itself. For newer version, see Jacob Hume's answer.

Composer Update Laravel

When you run composer update, composer generates a file called composer.lock which lists all your packages and the currently installed versions. This allows you to later run composer install, which will install the packages listed in that file, recreating the environment that you were last using.

It appears from your log that some of the versions of packages that are listed in your composer.lock file are no longer available. Thus, when you run composer install, it complains and fails. This is usually no big deal - just run composer update and it will attempt to build a set of packages that work together and write a new composer.lock file.

However, you're running into a different problem. It appears that, in your composer.json file, the original developer has added some pre- or post- update actions that are failing, specifically a php artisan migrate command. This can be avoided by running the following: composer update --no-scripts

This will run the composer update but will skip over the scripts added to the file. You should be able to successfully run the update this way.

However, this does not solve the problem long-term. There are two problems:

A migration is for database changes, not random stuff like compiling assets. Go through the migrations and remove that code from there.
Assets should not be compiled each time you run composer update. Remove that step from the composer.json file.

From what I've read, best practice seems to be compiling assets on an as-needed basis during development (ie. when you're making changes to your LESS files - ideally using a tool like gulp.js) and before deployment.

MD5 hashing in Android

Please use SHA-512, MD5 is insecure

public static String getSHA512SecurePassword(String passwordToHash) {
    String generatedPassword = null;
    try {
        MessageDigest md = MessageDigest.getInstance("SHA-512");
        md.update("everybreathyoutake".getBytes());
        byte[] bytes = md.digest(passwordToHash.getBytes());
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < bytes.length; i++) {
            sb.append(Integer.toString((bytes[i] & 0xff) + 0x100, 16).substring(1));
        }
        generatedPassword = sb.toString();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
    return generatedPassword;
}

Generate a random letter in Python

You can just make a list:

import random
list1=['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h']
b=random.randint(0,7)
print(list1[b])

How to change the server port from 3000?

1-> Using File Default Config- Angular-cli comes from the ember-cli project. To run the application on specific port, create an .ember-cli file in the project root. Add your JSON config in there:

{ "port": 1337 }

2->Using Command Line Tool Run this command in Angular-Cli

ng serve --port 1234

To change the port number permanently:

Goto

node_modules/angular-cli/commands/server.js

Search for var defaultPort = process.env.PORT || 4200; (change 4200 to anything else you want).

case statement in SQL, how to return multiple variables?

Depending on your use case, instead of using a case statement, you can use the union of multiple select statements, one for each condition.

My goal when I found this question was to select multiple columns conditionally. I didn't necessarily need the case statement, so this is what I did.

For example:

  SELECT
    a1,
    a2,
    a3,
    ...
  WHERE <condition 1>
    AND (<other conditions>)
  UNION
  SELECT
    b1,
    b2,
    b3,
    ...
  WHERE <condition 2>
    AND (<other conditions>)
  UNION
  SELECT
  ...
-- and so on

Be sure that exactly one condition evaluates to true at a time.

I'm using Postgresql, and the query planner was smart enough to not run a select statement at all if the condition in the where clause evaluated to false (i.e. only one of the select statement actually runs), so this was also performant for me.

npm ERR! code UNABLE_TO_GET_ISSUER_CERT_LOCALLY

got the below error

PS C:\Users\chpr\Documents\GitHub\vue-nwjs-hours-tracking> npm install vue npm ERR! code UNABLE_TO_GET_ISSUER_CERT_LOCALLY npm ERR! errno UNABLE_TO_GET_ISSUER_CERT_LOCALLY npm ERR! request to https://registry.npmjs.org/vue failed, reason: unable to get local issuer certificate

npm ERR! A complete log of this run can be found in: npm ERR!
C:\Users\chpr\AppData\Roaming\npm-cache_logs\2020-07-29T03_22_40_225Z-debug.log PS C:\Users\chpr\Documents\GitHub\vue-nwjs-hours-tracking> PS C:\Users\chpr\Documents\GitHub\vue-nwjs-hours-tracking> npm ERR!
C:\Users\chpr\AppData\Roaming\npm-cache_logs\2020-07-29T03_22_40_225Z-debug.log

Below command solved the issue:

npm config set strict-ssl false

converting Java bitmap to byte array

In order to avoid OutOfMemory error for bigger files, I would solve the task by splitting a bitmap into several parts and merging their parts' bytes.

private byte[] getBitmapBytes(Bitmap bitmap)
{
    int chunkNumbers = 10;
    int bitmapSize = bitmap.getRowBytes() * bitmap.getHeight();
    byte[] imageBytes = new byte[bitmapSize];
    int rows, cols;
    int chunkHeight, chunkWidth;
    rows = cols = (int) Math.sqrt(chunkNumbers);
    chunkHeight = bitmap.getHeight() / rows;
    chunkWidth = bitmap.getWidth() / cols;

    int yCoord = 0;
    int bitmapsSizes = 0;

    for (int x = 0; x < rows; x++)
    {
        int xCoord = 0;
        for (int y = 0; y < cols; y++)
        {
            Bitmap bitmapChunk = Bitmap.createBitmap(bitmap, xCoord, yCoord, chunkWidth, chunkHeight);
            byte[] bitmapArray = getBytesFromBitmapChunk(bitmapChunk);
            System.arraycopy(bitmapArray, 0, imageBytes, bitmapsSizes, bitmapArray.length);
            bitmapsSizes = bitmapsSizes + bitmapArray.length;
            xCoord += chunkWidth;

            bitmapChunk.recycle();
            bitmapChunk = null;
        }
        yCoord += chunkHeight;
    }

    return imageBytes;
}


private byte[] getBytesFromBitmapChunk(Bitmap bitmap)
{
    int bitmapSize = bitmap.getRowBytes() * bitmap.getHeight();
    ByteBuffer byteBuffer = ByteBuffer.allocate(bitmapSize);
    bitmap.copyPixelsToBuffer(byteBuffer);
    byteBuffer.rewind();
    return byteBuffer.array();
}

Does Python support short-circuiting?

Yep, both and and or operators short-circuit -- see the docs.

How to use a WSDL file to create a WCF service (not make a call)

Use svcutil.exe with the /sc switch to generate the WCF contracts. This will create a code file that you can add to your project. It will contain all interfaces and data types you need to create your service. Change the output location using the /o switch, or you can find the file in the folder where you ran svcutil.exe. The default language is C# but I think (I've never tried it) you should be able to change this using /l:vb.

svcutil /sc "WSDL file path"

If your WSDL has any supporting XSD files pass those in as arguments after the WSDL.

svcutil /sc "WSDL file path" "XSD 1 file path" "XSD 2 file path" ... "XSD n file path"

Then create a new class that is your service and implement the contract interface you just created.

Find running median from a stream of integers

Can't you do this with just one heap? Update: no. See the comment.

Invariant: After reading 2*n inputs, the min-heap holds the n largest of them.

Loop: Read 2 inputs. Add them both to the heap, and remove the heap's min. This reestablishes the invariant.

So when 2n inputs have been read, the heap's min is the nth largest. There'll need to be a little extra complication to average the two elements around the median position and to handle queries after an odd number of inputs.

IE Driver download location Link for Selenium

The downloads have moved, it says that on that very page:

http://selenium-release.storage.googleapis.com/index.html

Composer require runs out of memory. PHP Fatal error: Allowed memory size of 1610612736 bytes exhausted

Just in case you get a composer error with:

Could not open input file: composer

run:

php -d memory_limit=-1 /usr/local/bin/composer require ...

Expanding a parent <div> to the height of its children

I made a parent div expand around content of a child div by having the child div as a single column that does not have any positioning attribute such as absolute specified.

Example:

#wrap {width:400px;padding:10px 200px 10px 200px;position:relative;margin:0px auto;}
#maincolumn {width:400px;}

Based on maincolumn div being the deepest child div of #wrap this defines the depth of the #wrap div and the 200px padding on either side creates two big blank columns for you to place absolutely positioned divs in as you please. You could even change the padding top and bottom to place header divs and footer divs using position:absolute.

SQL Server Case Statement when IS NULL

In this situation you can use ISNULL() function instead of CASE expression

ISNULL(B.[STAT], C.[EVENT DATE]+10) AS [DATE]

What is "string[] args" in Main class for?

This is an array of the command line switches pass to the program. E.g. if you start the program with the command "myapp.exe -c -d" then string[] args[] will contain the strings "-c" and "-d".

Objective-C for Windows

You can use Objective C inside the Windows environment. If you follow these steps, it should be working just fine:

Visit the GNUstep website and download GNUstep MSYS Subsystem (MSYS for GNUstep), GNUstep Core (Libraries for GNUstep), and GNUstep Devel
After downloading these files, install in that order, or you will have problems with configuration
Navigate to C:\GNUstep\GNUstep\System\Library\Headers\Foundation¹ and ensure that Foundation.h exists
Open up a command prompt and run gcc -v to check that GNUstep MSYS is correctly installed (if you get a file not found error, ensure that the bin folder of GNUstep MSYS is in your PATH)

Use this simple "Hello World" program to test GNUstep's functionality:

#include <Foundation/Foundation.h>

int main(void)
{
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
    NSLog(@"Hello World!.");
    [pool drain];
 return;
}

Go back to the command prompt and cd to where you saved the "Hello World" program and then compile it:²

gcc -o helloworld.exe <HELLOWORLD>.m -I /GNUstep/GNUstep/System/Library/Headers -L /GNUstep/GNUstep/System/Library/Libraries -std=c99 -lobjc -lgnustep-base -fconstant-string-class=NSConstantString

Finally, from the command prompt, type helloworld to run it

All the best, and have fun with Objective-C!

NOTES:

I used the default install path - adjust your command line accordingly
Ensure the folder path of yours is similar to mine, otherwise you will get an error

Update int column in table with unique incrementing values

simple query would be, just set a variable to some number you want. then update the column you need by incrementing 1 from that number. for all the rows it'll update each row id by incrementing 1

SET @a  = 50000835 ;  
UPDATE `civicrm_contact` SET external_identifier = @a:=@a+1 
WHERE external_identifier IS NULL;

YouTube Video Embedded via iframe Ignoring z-index?

Only this one worked for me:

<script type="text/javascript">
var frames = document.getElementsByTagName("iframe");
    for (var i = 0; i < frames.length; i++) {
        src = frames[i].src;
        if (src.indexOf('embed') != -1) {
        if (src.indexOf('?') != -1) {
            frames[i].src += "&wmode=transparent";
        } else {
            frames[i].src += "?wmode=transparent";
        }
    }
}
</script>

I load it in the footer.php Wordpress file. Code found in comment here (thanks Gerson)

How to query between two dates using Laravel and Eloquent?

If you want to check if current date exist in between two dates in db: =>here the query will get the application list if employe's application from and to date is exist in todays date.

$list=  (new LeaveApplication())
            ->whereDate('from','<=', $today)
            ->whereDate('to','>=', $today)
            ->get();

Compiling an application for use in highly radioactive environments

Here are huge amount of replies, but I'll try to sum up my ideas about this.

Something crashes or does not work correctly could be result of your own mistakes - then it should be easily to fix when you locate the problem. But there is also possibility of hardware failures - and that's difficult if not impossible to fix in overall.

I would recommend first to try to catch the problematic situation by logging (stack, registers, function calls) - either by logging them somewhere into file, or transmitting them somehow directly ("oh no - I'm crashing").

Recovery from such error situation is either reboot (if software is still alive and kicking) or hardware reset (e.g. hw watchdogs). Easier to start from first one.

If problem is hardware related - then logging should help you to identify in which function call problem occurs and that can give you inside knowledge of what is not working and where.

Also if code is relatively complex - it makes sense to "divide and conquer" it - meaning you remove / disable some function calls where you suspect problem is - typically disabling half of code and enabling another half - you can get "does work" / "does not work" kind of decision after which you can focus into another half of code. (Where problem is)

If problem occurs after some time - then stack overflow can be suspected - then it's better to monitor stack point registers - if they constantly grows.

And if you manage to fully minimize your code until "hello world" kind of application - and it's still failing randomly - then hardware problems are expected - and there needs to be "hardware upgrade" - meaning invent such cpu / ram / ... -hardware combination which would tolerate radiation better.

Most important thing is probably how you get your logs back if machine fully stopped / resetted / does not work - probably first thing bootstap should do - is a head back home if problematic situation is entcovered.

If it's possible in your environment also to transmit a signal and receive response - you could try out to construct some sort of online remote debugging environment, but then you must have at least of communication media working and some processor/ some ram in working state. And by remote debugging I mean either GDB / gdb stub kind of approach or your own implementation of what you need to get back from your application (e.g. download log files, download call stack, download ram, restart)

How do I get multiple subplots in matplotlib?

Go with the following if you really want to use a loop. Nobody has actually answered how to feed data in a loop:

def plot(data):
    fig = plt.figure(figsize=(100, 100))
    for idx, k in enumerate(data.keys(), 1):
        x, y = data[k].keys(), data[k].values
        plt.subplot(63, 10, idx)
        plt.bar(x, y)  
    plt.show()

MySQL "ERROR 1005 (HY000): Can't create table 'foo.#sql-12c_4' (errno: 150)"

I was using a duplicate Foreign Key Name.

Renaming the FK name solved my problem.

Clarification:

Both tables had a constraint called PK1, FK1, etc. Renaming them/making the names unique solved the problem.

Create a Path from String in Java7

You can just use the Paths class:

Path path = Paths.get(textPath);

... assuming you want to use the default file system, of course.

Embed a PowerPoint presentation into HTML

Try PowerPoint ActiveX 2.4. This is an ActiveX component that embeds PowerPoint into an OCX.

Since you are using just Internet Explorer 6 and Internet Explorer 7 you can embed this component into the HTML.

What is the Oracle equivalent of SQL Server's IsNull() function?

Also use NVL2 as below if you want to return other value from the field_to_check:

NVL2( field_to_check, value_if_NOT_null, value_if_null )

Usage: ORACLE/PLSQL: NVL2 FUNCTION

How to resolve the C:\fakepath?

Some browsers have a security feature that prevents JavaScript from knowing your file's local full path. It makes sense - as a client, you don't want the server to know your local machine's filesystem. It would be nice if all browsers did this.

Collections sort(List<T>,Comparator<? super T>) method example

You probably want something like this:

Collections.sort(students, new Comparator<Student>() {
                     public int compare(Student s1, Student s2) {
                           if(s1.getName() != null && s2.getName() != null && s1.getName().comareTo(s1.getName()) != 0) {
                               return s1.getName().compareTo(s2.getName());
                           } else {
                             return s1.getAge().compareTo(s2.getAge());
                          }
                      }
);

This sorts the students first by name. If a name is missing, or two students have the same name, they are sorted by their age.

How to continue a Docker container which has exited

by name

sudo docker start bob_the_container

or by Id

sudo docker start aa3f365f0f4e

this restarts stopped container, use -i to attach container's STDIN or instead of -i you can attach to container session (if you run with -it)

sudo docker attach bob_the_container

Remove all special characters with RegExp

str.replace(/\s|[0-9_]|\W|[#$%^&*()]/g, "") I did sth like this. But there is some people who did it much easier like str.replace(/\W_/g,"");

jQuery Validate Required Select

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.17.0/jquery.validate.min.js"></script>

 <form id="myform"> 
       <select class="form-control" name="user_type">
        <option value="">Select</option>
        <option value="2">1</option>
        <option value="3">2</option>
        </select>
       </form>


<script>
  $('#myform').validate({ // initialize the plugin
            rules: {
          user_type:{ required: true},
         }
      });
</script>

select value will be blank

Can't use method return value in write context

As pointed out by others, it's a (weird) limitation of empty().

For most purproses, doing this is equal as calling empty, but this works:

if ($r->getError() != '')

How do I make UITableViewCell's ImageView a fixed size even when the image is smaller

A Simply Swift,

Step 1: Create One SubClass of UITableViewCell
Step 2: Add this method to SubClass of UITableViewCell

override func layoutSubviews() {
    super.layoutSubviews()
    self.imageView?.frame = CGRectMake(0, 0, 10, 10)
}

Step 3: Create cell object using that SubClass in cellForRowAtIndexPath,

Ex: let customCell:CustomCell = CustomCell(style: UITableViewCellStyle.Default, reuseIdentifier: "Cell")

Step 4: Enjoy

Run AVD Emulator without Android Studio

You may create a shell script and put it in your desktop:

Dim WinScriptHost
Set WinScriptHost = CreateObject("WScript.Shell")
WinScriptHost.Run "C:\Users\<user>\AppData\Local\Android\Sdk\emulator\emulator -avd <AVD_NAME>", 0
Set WinScriptHost = Nothing

Replace <user> with your user id, and <AVD_NAME> with the name of your avd file, e.g. pixel_2_api_28.

how to convert from int to char*?

You also can use casting.

example:

string s;
int value = 3;
s.push_back((char)('0' + value));

What does 'IISReset' do?

IISReset stops and restarts the entire web server (including non-ASP.NET apps)
Recycling an app pool will only affect applications running in that app pool.
Editing the web.config in a web application only affects that web application (recycles just that app).
Editing the machine.config on the machine will recycle all app pools running.

IIS will monitor the /bin directory of your application. Whenever a change is detected in those dlls, it will recycle the app and re-load those new dlls. It also monitors the web.config & machine.config in the same way and performs the same action for the applicable apps.

PHP shorthand for isset()?

Update for PHP 7 (thanks shock_gone_wild)

PHP 7 introduces the so called null coalescing operator which simplifies the below statements to:

$var = $var ?? "default";

Before PHP 7

No, there is no special operator or special syntax for this. However, you could use the ternary operator:

$var = isset($var) ? $var : "default";

Or like this:

isset($var) ?: $var = 'default';

Check object empty

In Java, you can verify using Object utils.

import static java.util.Objects.isNull;
if(IsNull(yourObject)){
  //your block here
}

How can I easily switch between PHP versions on Mac OSX?

Example: Let us switch from php 7.4 to 7.3

brew unlink [email protected]
brew install [email protected]
brew link [email protected]

If you get Warning: [email protected] is keg-only and must be linked with --force Then try with:

brew link [email protected] --force

C# error: "An object reference is required for the non-static field, method, or property"

It looks like you want:

public static string GetRandomBits()

Without static, you would need an object before you can call the GetRandomBits() method. However, since the implementation of GetRandomBits() does not depend on the state of any Program object, it's best to declare it static.

How to mock a final class with mockito

Yes same problem here, we cannot mock a final class with Mockito. To be accurate, Mockito cannot mock/spy following:

final classes
anonymous classes
primitive types

But using a wrapper class seems to me a big price to pay, so get PowerMockito instead.

How to have multiple CSS transitions on an element?

Transition properties are comma delimited in all browsers that support transitions:

.nav a {
  transition: color .2s, text-shadow .2s;
}

ease is the default timing function, so you don't have to specify it. If you really want linear, you will need to specify it:

transition: color .2s linear, text-shadow .2s linear;

This starts to get repetitive, so if you're going to be using the same times and timing functions across multiple properties it's best to go ahead and use the various transition-* properties instead of the shorthand:

transition-property: color, text-shadow;
transition-duration: .2s;
transition-timing-function: linear;

HTTPS setup in Amazon EC2

You need to register a domain(on GoDaddy for example) and put a load balancer in front of your ec2 instance - as DigaoParceiro said in his answer.

The issue is that domains generated by amazon on your ec2 instances are ephemeral. Today the domain is belonging to you, tomorrow it may not.

For that reason, let's encrypt throws an error when you try to register a certificate on amazon generated domain that states:

The ACME server refuses to issue a certificate for this domain name, because it is forbidden by policy

More details about this here: https://community.letsencrypt.org/t/policy-forbids-issuing-for-name-on-amazon-ec2-domain/12692/4

Lambda expression to convert array/List of String to array/List of Integers

For List :

List<Integer> intList 
 = stringList.stream().map(Integer::valueOf).collect(Collectors.toList());

For Array :

int[] intArray = Arrays.stream(stringArray).mapToInt(Integer::valueOf).toArray();

Outlets cannot be connected to repeating content iOS

Sometimes Xcode could not control over correctly cell outlet connection.

Somehow my current cell’s label/button has connected another cell I just remove those and error goes away.

How to modify a text file?

The fileinput module of the Python standard library will rewrite a file inplace if you use the inplace=1 parameter:

import sys
import fileinput

# replace all occurrences of 'sit' with 'SIT' and insert a line after the 5th
for i, line in enumerate(fileinput.input('lorem_ipsum.txt', inplace=1)):
    sys.stdout.write(line.replace('sit', 'SIT'))  # replace 'sit' and write
    if i == 4: sys.stdout.write('\n')  # write a blank line after the 5th line

Python [Errno 98] Address already in use

A simple solution that worked for me is to close the Terminal and restart it.

C#: Looping through lines of multiline string

You can use a StringReader to read a line at a time:

using (StringReader reader = new StringReader(input))
{
    string line = string.Empty;
    do
    {
        line = reader.ReadLine();
        if (line != null)
        {
            // do something with the line
        }

    } while (line != null);
}

Differences in string compare methods in C#

s1.CompareTo(s2): Do NOT use if primary purpose is to determine whether two strings are equivalent
s1 == s2: Cannot ignore case
s1.Equals(s2, StringComparison): Throws NullReferenceException if s1 is null
String.Equals(s2, StringComparison): By process of eliminiation, this static method is the WINNER (assuming a typical use case to determine whether two strings are equivalent)!

Remove duplicated rows using dplyr

For completeness’ sake, the following also works:

df %>% group_by(x) %>% filter (! duplicated(y))

However, I prefer the solution using distinct, and I suspect it’s faster, too.

Remove last character from string. Swift language

Swift 4/5

var str = "bla"
str.removeLast() // returns "a"; str is now "bl"

What is the best way to find the users home directory in Java?

As I was searching for Scala version, all I could find was McDowell's JNA code above. I include my Scala port here, as there currently isn't anywhere more appropriate.

import com.sun.jna.platform.win32._
object jna {
    def getHome: java.io.File = {
        if (!com.sun.jna.Platform.isWindows()) {
            new java.io.File(System.getProperty("user.home"))
        }
        else {
            val pszPath: Array[Char] = new Array[Char](WinDef.MAX_PATH)
            new java.io.File(Shell32.INSTANCE.SHGetSpecialFolderPath(null, pszPath, ShlObj.CSIDL_MYDOCUMENTS, false) match {
                case true => new String(pszPath.takeWhile(c => c != '\0'))
                case _    => System.getProperty("user.home")
            })
        }
    }
}

As with the Java version, you will need to add Java Native Access, including both jar files, to your referenced libraries.

It's nice to see that JNA now makes this much easier than when the original code was posted.

How to export data as CSV format from SQL Server using sqlcmd?

Usually sqlcmd comes with bcp utility (as part of mssql-tools) which exports into CSV by default.

Usage:

bcp {dbtable | query} {in | out | queryout | format} datafile

For example:

bcp.exe MyTable out data.csv

To dump all tables into corresponding CSV files, here is the Bash script:

#!/usr/bin/env bash
# Script to dump all tables from SQL Server into CSV files via bcp.
# @file: bcp-dump.sh
server="sql.example.com" # Change this.
user="USER" # Change this.
pass="PASS" # Change this.
dbname="DBNAME" # Change this.
creds="-S '$server' -U '$user' -P '$pass' -d '$dbname'"
sqlcmd $creds -Q 'SELECT * FROM sysobjects sobjects' > objects.lst
sqlcmd $creds -Q 'SELECT * FROM information_schema.routines' > routines.lst
sqlcmd $creds -Q 'sp_tables' | tail -n +3 | head -n -2 > sp_tables.lst
sqlcmd $creds -Q 'SELECT name FROM sysobjects sobjects WHERE xtype = "U"' | tail -n +3 | head -n -2 > tables.lst

for table in $(<tables.lst); do
  sqlcmd $creds -Q "exec sp_columns $table" > $table.desc && \
  bcp $table out $table.csv -S $server -U $user -P $pass -d $dbname -c
done

How to list the files inside a JAR file?

erickson's answer worked perfectly:

Here's the working code.

CodeSource src = MyClass.class.getProtectionDomain().getCodeSource();
List<String> list = new ArrayList<String>();

if( src != null ) {
    URL jar = src.getLocation();
    ZipInputStream zip = new ZipInputStream( jar.openStream());
    ZipEntry ze = null;

    while( ( ze = zip.getNextEntry() ) != null ) {
        String entryName = ze.getName();
        if( entryName.startsWith("images") &&  entryName.endsWith(".png") ) {
            list.add( entryName  );
        }
    }

 }
 webimages = list.toArray( new String[ list.size() ] );

And I have just modify my load method from this:

File[] webimages = ... 
BufferedImage image = ImageIO.read(this.getClass().getResource(webimages[nextIndex].getName() ));

To this:

String  [] webimages = ...

BufferedImage image = ImageIO.read(this.getClass().getResource(webimages[nextIndex]));

How to detect if CMD is running as Administrator/has elevated privileges?

Here's a simple method I've used on Windows 7 through Windows 10. Basically, I simply use the "IF EXIST" command to check for the Windows\System32\WDI\LogFiles folder. The WDI folder exists on every install of Windows from at least 7 onward, and it requires admin privileges to access. The WDI folder always has a LogFiles folder inside it. So, running "IF EXIST" on the WDI\LogFiles folder will return true if run as admin, and false if not run as admin. This can be used in a batch file to check privilege level, and branch to whichever commands you desire based on that result.

Here's a brief snippet of example code:

IF EXIST %SYSTEMROOT%\SYSTEM32\WDI\LOGFILES GOTO GOTADMIN
(Commands for running with normal privileges)

:GOTADMIN
(Commands for running with admin privileges)

Keep in mind that this method assumes the default security permissions have not been modified on the WDI folder (which is unlikely to happen in most situations, but please see caveat #2 below). Even in that case, it's simply a matter of modifying the code to check for a different common file/folder that requires admin access (System32\config\SAM may be a good alternate candidate), or you could even create your own specifically for that purpose.

There are two caveats about this method though:

Disabling UAC will likely break it through the simple fact that everything would be run as admin anyway.
Attempting to open the WDI folder in Windows Explorer and then clicking "Continue" when prompted will add permanent access rights for that user account, thus breaking my method. If this happens, it can be fixed by removing the user account from the WDI folder security permissions. If for any reason the user MUST be able to access the WDI folder with Windows Explorer, then you'd have to modify the code to check a different folder (as mentioned above, creating your own specifically for this purpose may be a good choice).

So, admittedly my method isn't perfect since it can be broken, but it's a relatively quick method that's easy to implement, is equally compatible with all versions of Windows 7, 8 and 10, and provided I stay mindful of the mentioned caveats has been 100% effective for me.

Assign command output to variable in batch file

You can't assign a process output directly into a var, you need to parse the output with a For /F loop:

@Echo OFF

FOR /F "Tokens=2,*" %%A IN (
    'Reg Query "HKEY_CURRENT_USER\Software\Macromedia\FlashPlayer" /v "CurrentVersion"'
) DO (
    REM Set "Version=%%B"
    Echo Version: %%B
)

Pause&Exit

http://ss64.com/nt/for_f.html

PS: Change the reg key used if needed.

An item with the same key has already been added

I had the same problem and this is how I solved it. I had a duplicate property with the same name in my ViewModel. One Property was in BaseViewModel and another is in derived Model.

public class BaseviewModel{
  public int UserId { get; set; }
}


 public class Model : BaseViewModel
 {
     public int UserId { get; set; }
 }

I changed that to

public class BaseviewModel{
   public int UserId { get; set; }
}


public class Model : BaseViewModel
{
    public int User_Id { get; set; }
}

Now it is working fine.

How to combine GROUP BY and ROW_NUMBER?

Undoubtly this can be simplified but the results match your expectations.

The gist of this is to

Calculate the maximum price in a seperate CTE for each t2ID
Calculate the total price in a seperate CTE for each t2ID
Combine the results of both CTE's

SQL Statement

;WITH MaxPrice AS ( 
    SELECT  t2ID
            , t1ID
    FROM    (       
                SELECT  t2.ID AS t2ID
                        , t1.ID AS t1ID
                        , rn = ROW_NUMBER() OVER (PARTITION BY t2.ID ORDER BY t1.Price DESC)
                FROM    @t1 t1
                        INNER JOIN @relation r ON r.t1ID = t1.ID        
                        INNER JOIN @t2 t2 ON t2.ID = r.t2ID
            ) maxt1
    WHERE   maxt1.rn = 1                            
)
, SumPrice AS (
    SELECT  t2ID = t2.ID
            , Price = SUM(Price)
    FROM    @t1 t1
            INNER JOIN @relation r ON r.t1ID = t1.ID
            INNER JOIN @t2 t2 ON t2.ID = r.t2ID
    GROUP BY
            t2.ID           
)           
SELECT  t2.ID
        , t2.Name
        , t2.Orders
        , mp.t1ID
        , t1.ID
        , t1.Name
        , sp.Price
FROM    @t2 t2
        INNER JOIN MaxPrice mp ON mp.t2ID = t2.ID
        INNER JOIN SumPrice sp ON sp.t2ID = t2.ID
        INNER JOIN @t1 t1 ON t1.ID = mp.t1ID

MySQL Select Multiple VALUES

Try or:

WHERE id = 3 or id = 4

Or the equivalent in:

WHERE id in (3,4)

Data-frame Object has no Attribute

Quick fix: Change how excel converts imported files. Go to 'File', then 'Options', then 'Advanced'. Scroll down and uncheck 'Use system seperators'. Also change 'Decimal separator' to '.' and 'Thousands separator' to ',' . Then simply 're-save' your file in the CSV (Comma delimited) format. The root cause is usually associated with how the csv file is created. Trust that helps. Point is, why use extra code if not necessary? Cross-platform understanding and integration is key in engineering/development.

SQL Server: use CASE with LIKE

Add an END at last before alias name.

CASE WHEN countries LIKE '%'+@selCountry+'%' 
     THEN 'national' ELSE 'regional' 
END AS validity

For example:

SELECT CASE WHEN countries LIKE '%'+@selCountry+'%' 
       THEN 'national' ELSE 'regional' 
       END AS validity
FROM TableName

jQuery and TinyMCE: textarea value doesn't submit

From TinyMCE, jQuery and Ajax forms:

TinyMCE Form Submission

When a textarea is replaced by TinyMCE, it's actually hidden and TinyMCE editor (an iframe) is displayed instead.

However, it's this textarea's contents which is sent when the form is submitted. Consequently its contents has to be updated before the form submission.

For a standard form submission , it's handled by TinyMCE . For an Ajax form submission, you have to do it manually, by calling (before the form is submitted):

tinyMCE.triggerSave();

$('form').bind('form-pre-serialize', function(e) {
    tinyMCE.triggerSave();
});

Uncaught TypeError: Cannot read property 'msie' of undefined

$.browser was removed from jQuery starting with version 1.9. It is now available as a plugin. It's generally recommended to avoid browser detection, which is why it was removed.

Database design for a survey

Having a large Answer table, in and of itself, is not a problem. As long as the indexes and constraints are well defined you should be fine. Your second schema looks good to me.

Where is the documentation for the values() method of Enum?

Run this

    for (Method m : sex.class.getDeclaredMethods()) {
        System.out.println(m);
    }

you will see

public static test.Sex test.Sex.valueOf(java.lang.String)
public static test.Sex[] test.Sex.values()

These are all public methods that "sex" class has. They are not in the source code, javac.exe added them

Notes:

never use sex as a class name, it's difficult to read your code, we use Sex in Java
when facing a Java puzzle like this one, I recommend to use a bytecode decompiler tool (I use Andrey Loskutov's bytecode outline Eclispe plugin). This will show all what's inside a class

How do I push to GitHub under a different username?

Follow the following steps:

You must understand that, you define author before commiting! the commits are already frozen: they have whatever name is set for their author and committer, and these cannot be changed.

# you can check what's currently:
git config user.name
git config user.email

git config user.name "your_github_username"
git config user.email "your_github_email"

# Again check what's currently:
git config user.name
git config user.email

Check to whom your commit is tagged to?

git log
# once you're confirmed that it's tagged to you, then you should move to step 3

In case, the author is wrong then you can easily undo last commit without losing changes

Also, before moving to step3, don't forget to follow step one for sanity check.!

give yourself a prompt to enter github_username and github_password

git config --local credential.helper ""
git push
# it will ask you to enter your github_username and github_password

Accessing post variables using Java Servlets

POST variables should be accessible via the request object: HttpRequest.getParameterMap(). The exception is if the form is sending multipart MIME data (the FORM has enctype="multipart/form-data"). In that case, you need to parse the byte stream with a MIME parser. You can write your own or use an existing one like the Apache Commons File Upload API.

Suppress console output in PowerShell

Try redirecting the output to Out-Null. Like so,

$key = & 'gpg' --decrypt "secret.gpg" --quiet --no-verbose | out-null

Deleting Objects in JavaScript

The delete operator deletes only a reference, never an object itself. If it did delete the object itself, other remaining references would be dangling, like a C++ delete. (And accessing one of them would cause a crash. To make them all turn null would mean having extra work when deleting or extra memory for each object.)

Since Javascript is garbage collected, you don't need to delete objects themselves - they will be removed when there is no way to refer to them anymore.

It can be useful to delete references to an object if you are finished with them, because this gives the garbage collector more information about what is able to be reclaimed. If references remain to a large object, this can cause it to be unreclaimed - even if the rest of your program doesn't actually use that object.

How do I add a newline to a TextView in Android?

Need to keep

1.android:maxLines="no of lines"

2.And use \n for getting of the next Lines

How to set shape's opacity?

In general you just have to define a slightly transparent color when creating the shape.

You can achieve that by setting the colors alpha channel.

#FF000000 will get you a solid black whereas #00000000 will get you a 100% transparent black (well it isn't black anymore obviously).

The color scheme is like this #AARRGGBB there A stands for alpha channel, R stands for red, G for green and B for blue.

The same thing applies if you set the color in Java. There it will only look like 0xFF000000.

UPDATE

In your case you'd have to add a solid node. Like below.

<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/shape_my">
    <stroke android:width="4dp" android:color="#636161" />
    <padding android:left="20dp"
        android:top="20dp"
        android:right="20dp"
        android:bottom="20dp" />
    <corners android:radius="24dp" />
    <solid android:color="#88000000" />
</shape>

The color here is a half transparent black.

How can I check MySQL engine type for a specific table?

SHOW TABLE STATUS WHERE Name = 'xxx'

This will give you (among other things) an Engine column, which is what you want.

What does "res.render" do, and what does the html file look like?

Renders a view and sends the rendered HTML string to the client.

res.render('index');

res.render('index', function(err, html) {
  if(err) {...}
  res.send(html);
});

DOCS HERE: https://expressjs.com/en/api.html#res.render

How can I use pickle to save a dict?

I've found pickling confusing (possibly because I'm thick). I found that this works, though:

myDictionaryString=str(myDictionary)

Which you can then write to a text file. I gave up trying to use pickle as I was getting errors telling me to write integers to a .dat file. I apologise for not using pickle.

How to pass model attributes from one Spring MVC controller to another controller?

Using just redirectAttributes.addFlashAttribute(...) -> "redirect:..." worked as well, didn't have to "reinsert" the model attribute.

Thanks, aborskiy!

What does this thread join code mean?

This is a favorite Java interview question.

Thread t1 = new Thread(new EventThread("e1"));
t1.start();
Thread e2 = new Thread(new EventThread("e2"));
t2.start();

while (true) {
    try {
        t1.join(); // 1
        t2.join(); // 2  These lines (1,2) are in in public static void main
        break;
    }
}

t1.join() means, t1 says something like "I want to finish first". Same is the case with t2. No matter who started t1 or t2 thread (in this case the main method), main will wait until t1 and t2 finish their task.

However, an important point to note down, t1 and t2 themselves can run in parallel irrespective of the join call sequence on t1 and t2. It is the main/daemon thread that has to wait.

How to open a file for both reading and writing?

Summarize the I/O behaviors

|          Mode          |  r   |  r+  |  w   |  w+  |  a   |  a+  |
| :--------------------: | :--: | :--: | :--: | :--: | :--: | :--: |
|          Read          |  +   |  +   |      |  +   |      |  +   |
|         Write          |      |  +   |  +   |  +   |  +   |  +   |
|         Create         |      |      |  +   |  +   |  +   |  +   |
|         Cover          |      |      |  +   |  +   |      |      |
| Point in the beginning |  +   |  +   |  +   |  +   |      |      |
|    Point in the end    |      |      |      |      |  +   |  +   |

and the decision branch

Align div right in Bootstrap 3

Do you mean something like this:

HTML

<div class="row">
  <div class="container">

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

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

      <div class="yellow-background">
        text
        <div class="pull-right">right content</div>  
      </div>

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

CSS

.yellow-background {
  background: blue;
}

.pull-right {
  background: yellow;
}

A full example can be found on Codepen.

How to set button click effect in Android?

Making a minor addition to Andràs answer:

You can use postDelayed to make the color filter last for a small period of time to make it more noticeable:

        @Override
        public boolean onTouch(final View v, MotionEvent event) {
            switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN: {
                    v.getBackground().setColorFilter(color, PorterDuff.Mode.SRC_ATOP);
                    v.invalidate();
                    break;
                }
                case MotionEvent.ACTION_UP: {
                    v.postDelayed(new Runnable() {
                        @Override
                        public void run() {
                            v.getBackground().clearColorFilter();
                            v.invalidate();
                        }
                    }, 100L);
                    break;
                }
            }
            return false;
        }

You can change the value of the delay 100L to suit your needs.

git ignore all files of a certain type, except those in a specific subfolder

An optional prefix ! which negates the pattern; any matching file excluded by a previous pattern will become included again. If a negated pattern matches, this will override lower precedence patterns sources.

http://schacon.github.com/git/gitignore.html

*.json
!spec/*.json

How to extract HTTP response body from a Python requests call?


import requests

site_request = requests.get("https://abhiunix.in")

site_response = str(site_request.content)

print(site_response)

You can do it either way.

Android Studio Could not initialize class org.codehaus.groovy.runtime.InvokerHelper

This is because of the gradle version.
Go to: gradle/wrapper/gradle-wrapper.properties.
Change a version of the course by this:

distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-all.zip

The console outputs:

Welcome to Gradle 6.3!

Here are the highlights of this release:
 - Java 14 support
 - Improved error messages for unexpected failures

For more details see https://docs.gradle.org/6.3/release-notes.html

Starting a Gradle Daemon (subsequent builds will be faster)

How to test if JSON object is empty in Java

I have added isEmpty() methods on JSONObject and JSONArray()

 //on JSONObject 
 public Boolean isEmpty(){         
     return !this.keys().hasNext();
 }

...

//on JSONArray
public Boolean isEmpty(){
    return this.length()==0;        
}

you can get it here https://github.com/kommradHomer/JSON-java

How to find out which JavaScript events fired?

Looks like Firebug (Firefox add-on) has the answer:

open Firebug
right click the element in HTML tab
click Log Events
enable Console tab
click Persist in Console tab (otherwise Console tab will clear after the page is reloaded)
select Closed (manually)

there will be something like this in Console tab:

...
mousemove clientX=1097, clientY=292
popupshowing
mousedown clientX=1097, clientY=292
focus
mouseup clientX=1097, clientY=292
click clientX=1097, clientY=292
mousemove clientX=1096, clientY=293
...

Source: Firebug Tip: Log Events

Open Google Chrome from VBA/Excel

The answer given by @ray above works perfectly, but make sure you are using the right path to open up the file. If you right click on your icon and click properties, you should see where the actual path is, just copy past that and it should work.

Properties

How to start a background process in Python?

While jkp's solution works, the newer way of doing things (and the way the documentation recommends) is to use the subprocess module. For simple commands its equivalent, but it offers more options if you want to do something complicated.

Example for your case:

import subprocess
subprocess.Popen(["rm","-r","some.file"])

This will run rm -r some.file in the background. Note that calling .communicate() on the object returned from Popen will block until it completes, so don't do that if you want it to run in the background:

import subprocess
ls_output=subprocess.Popen(["sleep", "30"])
ls_output.communicate()  # Will block for 30 seconds

See the documentation here.

Also, a point of clarification: "Background" as you use it here is purely a shell concept; technically, what you mean is that you want to spawn a process without blocking while you wait for it to complete. However, I've used "background" here to refer to shell-background-like behavior.

Iterate through a C++ Vector using a 'for' loop

A correct way of iterating over the vector and printing its values is as follows:

#include<vector>

// declare the vector of type int
vector<int> v;

// insert elements in the vector
for (unsigned int i = 0; i < 5; ++i){
    v.push_back(i);
}

// print those elements
for (auto it = v.begin(); it != v.end(); ++it){
    std::cout << *it << std::endl;
}

But at least in the present case it is nicer to use a range-based for loop:
for (auto x: v) std::cout << x << "\n";
(You may also add & after auto to make x a reference to the elements rather than a copy of them. It is then very similar to the above iterator-based approach, but easier to read and write.)

Make a phone call programmatically

Tried the Swift 3 option above, but it didnt work. I think you need the following if you are to run against iOS 10+ on Swift 3:

Swift 3 (iOS 10+):

let phoneNumber = mymobileNO.titleLabel.text       
UIApplication.shared.open(URL(string: phoneNumber)!, options: [:], completionHandler: nil)

error: This is probably not a problem with npm. There is likely additional logging output above

I already have the same problem . and I fix it using npm update & npm cache clean --force

Getting realtime output using subprocess

You can direct the subprocess output to the streams directly. Simplified example:

subprocess.run(['ls'], stderr=sys.stderr, stdout=sys.stdout)

Get file size, image width and height before upload

As far as I know there is not an easy way to do this since Javascript/JQuery does not have access to the local filesystem. There are some new features in html 5 that allows you to check certain meta data such as file size but I'm not sure if you can actually get the image dimensions.

Here is an article I found regarding the html 5 features, and a work around for IE that involves using an ActiveX control. http://jquerybyexample.blogspot.com/2012/03/how-to-check-file-size-before-uploading.html

How to check if input file is empty in jQuery

I know I'm late to the party but I thought I'd add what I ended up using for this - which is to simply check if the file upload input does not contain a truthy value with the not operator & JQuery like so:

if (!$('#videoUploadFile').val()) {
  alert('Please Upload File');
}

Note that if this is in a form, you may also want to wrap it with the following handler to prevent the form from submitting:

$(document).on("click", ":submit", function (e) {

  if (!$('#videoUploadFile').val()) {
  e.preventDefault();
  alert('Please Upload File');
  }

}

How to check if an array is empty?

you may use yourArray.length to findout number of elements in an array.

Make sure yourArray is not null before doing yourArray.length, otherwise you will end up with NullPointerException.

Text in a flex container doesn't wrap in IE11

Why use a complicated solution if a simple one works too?

.child {
  white-space: normal;
}

Is it possible to set an object to null?

"an object" of what type?

You can certainly assign NULL (and nullptr) to objects of pointer types, and it is implementation defined if you can assign NULL to objects of arithmetic types.

If you mean objects of some class type, the answer is NO (excepting classes that have operator= accepting pointer or arithmetic types)

"empty" is more plausible, as many types have both copy assignment and default construction (often implicitly). To see if an existing object is like a default constructed one, you will also need an appropriate bool operator==

Using the && operator in an if statement

So to make your expression work, changing && for -a will do the trick.

It is correct like this:

 if [ -f $VAR1 ] && [ -f $VAR2 ] && [ -f $VAR3 ]
 then  ....

or like

 if [[ -f $VAR1 && -f $VAR2 && -f $VAR3 ]]
 then  ....

or even

 if [ -f $VAR1 -a -f $VAR2 -a -f $VAR3 ]
 then  ....

You can find further details in this question bash : Multiple Unary operators in if statement and some references given there like What is the difference between test, [ and [[ ?.

Why am I getting a " Traceback (most recent call last):" error?

I don't know which version of Python you are using but I tried this in Python 3 and made a few changes and it looks like it works. The raw_input function seems to be the issue here. I changed all the raw_input functions to "input()" and I also made minor changes to the printing to be compatible with Python 3. AJ Uppal is correct when he says that you shouldn't name a variable and a function with the same name. See here for reference:

TypeError: 'int' object is not callable

My code for Python 3 is as follows:

# https://stackoverflow.com/questions/27097039/why-am-i-getting-a-traceback-most-recent-call-last-error

raw_input = 0
M = 1.6
# Miles to Kilometers
# Celsius Celsius = (var1 - 32) * 5/9
# Gallons to liters Gallons = 3.6
# Pounds to kilograms Pounds = 0.45
# Inches to centimete Inches = 2.54


def intro():
    print("Welcome! This program will convert measures for you.")
    main()

def main():
    print("Select operation.")
    print("1.Miles to Kilometers")
    print("2.Fahrenheit to Celsius")
    print("3.Gallons to liters")
    print("4.Pounds to kilograms")
    print("5.Inches to centimeters")

    choice = input("Enter your choice by number: ")

    if choice == '1':
        convertMK()

    elif choice == '2':
        converCF()

    elif choice == '3':
        convertGL()

    elif choice == '4':
        convertPK()

    elif choice == '5':
        convertPK()

    else:
        print("Error")


def convertMK():
    input_M = float(input(("Miles: ")))
    M_conv = (M) * input_M
    print("Kilometers: {M_conv}\n")
    restart = str(input("Do you wish to make another conversion? [y]Yes or [n]no: "))
    if restart == 'y':
        main()
    elif restart == 'n':
        end()
    else:
        print("I didn't quite understand that answer. Terminating.")
        main()

def converCF():
    input_F = float(input(("Fahrenheit: ")))
    F_conv = (input_F - 32) * 5/9
    print("Celcius: {F_conv}\n")
    restart = str(input("Do you wish to make another conversion? [y]Yes or [n]no: "))
    if restart == 'y':
        main()
    elif restart == 'n':
        end()
    else:
        print("I didn't quite understand that answer. Terminating.")
        main()

def convertGL():
    input_G = float(input(("Gallons: ")))
    G_conv = input_G * 3.6
    print("Centimeters: {G_conv}\n")
    restart = str(input("Do you wish to make another conversion? [y]Yes or [n]no: "))
    if restart == 'y':
        main()
    elif restart == 'n':
        end()
    else:
        print ("I didn't quite understand that answer. Terminating.")
        main()

def convertPK():
    input_P = float(input(("Pounds: ")))
    P_conv = input_P * 0.45
    print("Centimeters: {P_conv}\n")
    restart = str(input("Do you wish to make another conversion? [y]Yes or [n]no: "))
    if restart == 'y':
        main()
    elif restart == 'n':
        end()
    else:
        print ("I didn't quite understand that answer. Terminating.")
        main()

def convertIC():
    input_cm = float(input(("Inches: ")))
    inches_conv = input_cm * 2.54
    print("Centimeters: {inches_conv}\n")
    restart = str(input("Do you wish to make another conversion? [y]Yes or [n]no: "))
    if restart == 'y':
        main()
    elif restart == 'n':
        end()
    else:
        print ("I didn't quite understand that answer. Terminating.")
        main()

def end():
    print("This program will close.")
    exit()

intro()

I noticed a small bug in your code as well. This function should ideally convert pounds to kilograms but it looks like when it prints, it is printing "Centimeters" instead of kilograms.

def convertPK():
    input_P = float(input(("Pounds: ")))
    P_conv = input_P * 0.45
    # Printing error in the line below
    print("Centimeters: {P_conv}\n")
    restart = str(input("Do you wish to make another conversion? [y]Yes or [n]no: "))
    if restart == 'y':
        main()
    elif restart == 'n':
        end()
    else:
        print ("I didn't quite understand that answer. Terminating.")
        main()

I hope this helps.

Regex to match only uppercase "words" with some exceptions

For the first case you propose you can use: '[[:blank:]]+[A-Z0-9]+[[:blank:]]+', for example:

echo "The thing P1 must connect to the J236 thing in the Foo position" | grep -oE '[[:blank:]]+[A-Z0-9]+[[:blank:]]+'

In the second case maybe you need to use something else and not a regex, maybe a script with a dictionary of technical words...

Cheers, Fernando

How can I get an object's absolute position on the page in Javascript?

var cumulativeOffset = function(element) {
    var top = 0, left = 0;
    do {
        top += element.offsetTop  || 0;
        left += element.offsetLeft || 0;
        element = element.offsetParent;
    } while(element);

    return {
        top: top,
        left: left
    };
};

(Method shamelessly stolen from PrototypeJS; code style, variable names and return value changed to protect the innocent)

XSS filtering function in PHP

the best and the secure way is to use HTML Purifier. Follow this link for some hints on using it with Zend Framework.

HTML Purifier with Zend Framework

Error C1083: Cannot open include file: 'stdafx.h'

There are two solutions for it.

Solution number one: 1.Recreate the project. While creating a project ensure that precompiled header is checked(Application settings... *** Do not check empty project)

Solution Number two: 1.Create stdafx.h and stdafx.cpp in your project 2 Right click on project -> properties -> C/C++ -> Precompiled Headers 3.select precompiled header to create(/Yc) 4.Rebuild the solution

Drop me a message if you encounter any issue.

Binding select element to object in Angular

use this way also..

<h1>My Application</h1>
<select [(ngModel)]="selectedValue">
     <option *ngFor="let c of countries" value="{{c.id}}">{{c.name}}</option>
 </select>

How to permanently remove few commits from remote branch

 git reset --soft commit_id
 git stash save "message"
 git reset --hard commit_id
 git stash apply stash stash@{0}
 git push --force

HTML list-style-type dash

ul {
margin:0;
list-style-type: none;
}
li:before { content: "- ";}

Are types like uint32, int32, uint64, int64 defined in any stdlib header?

The questioner actually asked about int16 (etc) rather than (ugly) int16_t (etc).

There are no standard headers - nor any in Linux's /usr/include/ folder that define them without the "_t".

Angular 4: InvalidPipeArgument: '[object Object]' for pipe 'AsyncPipe'

In your MoviesService you should import FirebaseListObservable in order to define return type FirebaseListObservable<any[]>

import { AngularFireDatabase, FirebaseListObservable } from 'angularfire2/database';

then get() method should like this-

get (): FirebaseListObservable<any[]>{
        return this.db.list('/movies');
    }

this get() method will return FirebaseListObervable of movies list

In your MoviesComponent should look like this

export class MoviesComponent implements OnInit {
  movies: any[];

  constructor(private moviesDb: MoviesService) { }

  ngOnInit() {
    this.moviesDb.get().subscribe((snaps) => {
       this.movies = snaps;
   });
 }
}

Then you can easily iterate through movies without async pipe as movies[] data is not observable type, your html should be this

ul
  li(*ngFor='let movie of movies')
    {{ movie.title }}

if you declear movies as a

movies: FirebaseListObservable<any[]>;

then you should simply call

movies: FirebaseListObservable<any[]>;
ngOnInit() {
    this.movies = this.moviesDb.get();
}

and your html should be this

ul
  li(*ngFor='let movie of movies | async')
    {{ movie.title }}

"Input string was not in a correct format."

It looks like some space include in the text. Use

lvTwoOrMoreOptions.SelectedItems[0].Text.ToString().Trim()

and convert to int32.

hope this code will solve you

From comments

if your ListView is in report mode (i.e. it looks like a grid) then you will need the SubItems property. lvTwoOrMoreOptions.SelectedItems gets you each items in the list view - SubItems gets you the columns. So lvTwoOrMoreOptions.SelectedItems[0].SubItems[0] is the first column value,

Linux configure/make, --prefix?

In my situation, --prefix= failed to update the path correctly under some warnings or failures. please see the below link for the answer. https://stackoverflow.com/a/50208379/1283198

How to get position of a certain element in strings vector, to use it as an index in ints vector?

If you want an index, you can use std::find in combination with std::distance.

auto it = std::find(Names.begin(), Names.end(), old_name_);
if (it == Names.end())
{
  // name not in vector
} else
{
  auto index = std::distance(Names.begin(), it);
}

What is the best way to detect a mobile device?

Use this

if( screen.width <= 480 ) { 
    // is mobile 
}

Pass form data to another page with php

The best way to accomplish that is to use POST which is a method of Hypertext Transfer Protocol https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods

index.php

<html>
<body>

<form action="site2.php" method="post">
Name: <input type="text" name="name">
Email: <input type="text" name="email">
<input type="submit">
</form>

</body>
</html>

site2.php

 <html>
 <body>

 Hello <?php echo $_POST["name"]; ?>!<br>
 Your mail is <?php echo $_POST["mail"]; ?>.

 </body>
 </html>

output

Hello "name" !

Your email is "[email protected]" .

Programs & Examples On #Hoard

IntelliJ IDEA "The selected directory is not a valid home for JDK"

Visual Studio Code how to resolve merge conflicts with git?

C# "No suitable method found to override." -- but there is one

AttributeError("'str' object has no attribute 'read'")

How do I compile jrxml to get jasper?

MySQL Delete all rows from table and reset ID to zero

Flushing footer to bottom of the page, twitter bootstrap

how to download image from any web page in java

How to convert 1 to true or 0 to false upon model fetch

Using jQuery, Restricting File Size Before Uploading

How do you divide each element in a list by an int?

JPQL SELECT between date statement

Bind TextBox on Enter-key press

Check string length in PHP

Why am I getting "Cannot Connect to Server - A network-related or instance-specific error"?

How to find good looking font color if background color is known?

Are email addresses case sensitive?

wget/curl large file from google drive

How to change indentation mode in Atom?

SQL how to make null values come last when sorting ascending

How do I reference a local image in React?

Using Java to find substring of a bigger string using Regular Expression

Google Maps setCenter()

How can I check for "undefined" in JavaScript?

Git - push current branch shortcut

What's "P=NP?", and why is it such a famous question?

Class method decorator with self arguments?

How to concatenate int values in java?

Testing pointers for validity (C/C++)

Best way to use multiple SSH private keys on one client

Multiple key pairs on GitHub

In practice, what are the main uses for the new "yield from" syntax in Python 3.3?

How to pass extra variables in URL with WordPress

How to reference Microsoft.Office.Interop.Excel dll?

Is there an embeddable Webkit component for Windows / C# development?

ValueError : I/O operation on closed file

Should I URL-encode POST data?

LINQ to SQL: Multiple joins ON multiple Columns. Is this possible?

How can I use UserDefaults in Swift?

Set height of chart in Chart.js

Show only two digit after decimal

When adding a Javascript library, Chrome complains about a missing source map, why?

Send mail via Gmail with PowerShell V2's Send-MailMessage

How can I programmatically determine if my app is running in the iphone simulator?

What is Model in ModelAndView from Spring MVC?

jQuery - how to write 'if not equal to' (opposite of ==)

Can't change z-index with JQuery

SQL: How to perform string does not equal

How to save a data frame as CSV to a user selected location using tcltk

Exact time measurement for performance testing

jQuery.ajax returns 400 Bad Request

How do I use a char as the case in a switch-case?

UILabel Align Text to center

String Comparison in Java

The easiest way to transform collection to array?

How to send a HTTP OPTIONS request from the command line?

OPTIONS /path

OPTIONS *

Creating a Shopping Cart using only HTML/JavaScript

Failed to connect to 127.0.0.1:27017, reason: errno:111 Connection refused

jQuery.post( ) .done( ) and success:

Minimum and maximum date

Android background music service

MySQL CREATE FUNCTION Syntax

How to get the timezone offset in GMT(Like GMT+7:00) from android device?

Changing width property of a :before css selector using JQuery

How to resolve /var/www copy/write permission denied?

Error retrieving parent for item: No resource found that matches the given name after upgrading to AppCompat v23

How to convert a Title to a URL slug in jQuery?

git repo says it's up-to-date after pull but files are not updated

How to display HTML tags as plain text

What is the opposite of evt.preventDefault();

What is the proper declaration of main in C++?

Conversion failed when converting date and/or time from character string in SQL SERVER 2008

I can't install pyaudio on Windows? How to solve "error: Microsoft Visual C++ 14.0 is required."?

jQuery click function doesn't work after ajax call?

How to find list of possible words from a letter matrix [Boggle Solver]

what is the differences between sql server authentication and windows authentication..?

Facebook Like-Button - hide count?