I think that it's related with a route

Route::get('/article/{slug}', 'Front@slug');

associated with a particular method in my controller:

No, thats not it. The error message is coming from the route:cache command, not sure why clearing the cache calls this automatically.

The problem is a route which uses a Closure instead of a controller, which looks something like this:

//                       Thats the Closure
//                             v 
Route::get('/some/route', function() {
    return 'Hello World';
});

Since Closures can not be serialized, you can not cache your routes when you have routes which use closures.

You can use the is_cart() conditional tag:

if (! is_cart() ) {
  // Do something.
}

echo do_shortcode('[CONTACT-US-FORM]');

Use this in your template.

Look here for more: Do Shortcode

This is how I currently store a reference to the previous path in the $rootScope:

run(['$rootScope', function($rootScope) {
        $rootScope.$on('$locationChangeStart', function() {
            $rootScope.previousPage = location.pathname;
        });
}]);

If none of the above works, you might be dealing with a vfat filesystem. Use "df" to check.

See http://www.charlesmerriam.com/blog/2009/12/operation-not-permitted-and-the-fat-32-system/ for more details.

Though the complete difference is more complicated, the only difference that concerns me is when the machine creates the function object. Which in the case of declarations is before any statement is executed but after a statement body is invoked (be that the global code body or a sub-function's), and in the case of expressions is when the statement it is in gets executed. Other than that for all intents and purposes browsers treat them the same.

To help you understand, take a look at this performance test which busted an assumption I had made of internally declared functions not needing to be re-created by the machine when the outer function is invoked. Kind of a shame too as I liked writing code that way.

Hanselman had a really interesting podcast with a blind developer recently.

You must use --filter to run a single test method php phpunit --filter "/::testMethod( .*)?$/" ClassTest ClassTest.php

The above filter will run testMethod alone.

str.c_str() gives you a const char *, which is an LPCSTR (Long Pointer to Constant STRing) -- means that it's a pointer to a 0 terminated string of characters. W means wide string (composed of wchar_t instead of char).

sumr is implemented in terms of foldRight:

 final def sumr(implicit A: Monoid[A]): A = F.foldRight(self, A.zero)(A.append) 

foldRight is not always tail recursive, so you can overflow the stack if the collection is too long. See Why foldRight and reduceRight are NOT tail recursive? for some more discussion of when this is or isn't true.

Retrieve only the size in bytes, from ls.

ls -ltr | head -n1 | cut -d' ' -f2

Tomcat can work in 2 modes:

• BIO – blocking I/O (one thread per connection)
• NIO – non-blocking I/O (many more connections than threads)

Tomcat 7 is BIO by default, although consensus seems to be "don't use Bio because Nio is better in every way". You set this using the protocol parameter in the server.xml file.

• BIO will be HTTP/1.1 or org.apache.coyote.http11.Http11Protocol
• NIO will be org.apache.coyote.http11.Http11NioProtocol

If you're using BIO then I believe they should be more or less the same.

If you're using NIO then actually "maxConnections=1000" and "maxThreads=10" might even be reasonable. The defaults are maxConnections=10,000 and maxThreads=200. With NIO, each thread can serve any number of connections, switching back and forth but retaining the connection so you don't need to do all the usual handshaking which is especially time-consuming with HTTPS but even an issue with HTTP. You can adjust the "keepAlive" parameter to keep connections around for longer and this should speed everything up.

if you are adding multiple items to the list use this:

mAdapter.notifyItemRangeInserted(startPosition, itemcount);

This notify any registered observers that the currently reflected itemCount items starting at positionStart have been newly inserted. The item previously located at positionStart and beyond can now be found starting at position positinStart+itemCount

existing item in the dataset still considered up to date.

Here is another dirty hack :)

.application-title > img {
display: none;
}

.application-title::before {
content: url(path/example.jpg);
}

 function updateTextArea() {         
     var allVals = $('#c_b :checked').map(function() {
       return $(this).val();
     }).get();
     $('#t').val(allVals)
  }
 $(function() {
   $('#c_b input').click(updateTextArea);
   updateTextArea();
 });

Not sure why it's doing that. Try -s with the -o option to set the output file instead of >.

Combining @nawfal & @Kobi suggestions:

namespace Extensions
{
    /// <summary> Useful in number of places that return an empty byte array to avoid unnecessary memory allocation. </summary>
    public static class Array<T>
    {
        public static readonly T[] Empty = new T[0];
    }
}

Usage example:

Array<string>.Empty

UPDATE 2019-05-14

(credits to @Jaider ty)

Better use .Net API:

public static T[] Empty<T> ();

https://docs.microsoft.com/en-us/dotnet/api/system.array.empty?view=netframework-4.8

Applies to:

.NET Core: 3.0 Preview 5 2.2 2.1 2.0 1.1 1.0

.NET Framework: 4.8 4.7.2 4.7.1 4.7 4.6.2 4.6.1 4.6

.NET Standard: 2.1 Preview 2.0 1.6 1.5 1.4 1.3

...

HTH

Beware that -prune does not prevent descending into any directory as some have said. It prevents descending into directories that match the test it's applied to. Perhaps some examples will help (see the bottom for a regex example). Sorry for this being so lengthy.

$ find . -printf "%y %p\n"    # print the file type the first time FYI
d .
f ./test
d ./dir1
d ./dir1/test
f ./dir1/test/file
f ./dir1/test/test
d ./dir1/scripts
f ./dir1/scripts/myscript.pl
f ./dir1/scripts/myscript.sh
f ./dir1/scripts/myscript.py
d ./dir2
d ./dir2/test
f ./dir2/test/file
f ./dir2/test/myscript.pl
f ./dir2/test/myscript.sh

$ find . -name test
./test
./dir1/test
./dir1/test/test
./dir2/test

$ find . -prune
.

$ find . -name test -prune
./test
./dir1/test
./dir2/test

$ find . -name test -prune -o -print
.
./dir1
./dir1/scripts
./dir1/scripts/myscript.pl
./dir1/scripts/myscript.sh
./dir1/scripts/myscript.py
./dir2

$ find . -regex ".*/my.*p.$"
./dir1/scripts/myscript.pl
./dir1/scripts/myscript.py
./dir2/test/myscript.pl

$ find . -name test -prune -regex ".*/my.*p.$"
(no results)

$ find . -name test -prune -o -regex ".*/my.*p.$"
./test
./dir1/test
./dir1/scripts/myscript.pl
./dir1/scripts/myscript.py
./dir2/test

$ find . -regex ".*/my.*p.$" -a -not -regex ".*test.*"
./dir1/scripts/myscript.pl
./dir1/scripts/myscript.py

$ find . -not -regex ".*test.*"                   .
./dir1
./dir1/scripts
./dir1/scripts/myscript.pl
./dir1/scripts/myscript.sh
./dir1/scripts/myscript.py
./dir2

The for loop can only contain three parameters, you have used 4. Please restate the question, what do you want to achieve?

As of OpenCV 2.2.0, the package name for the Python bindings is "cv".The old bindings named "opencv" are not maintained any longer. You might have to adjust your code. See http://opencv.willowgarage.com/wiki/PythonInterface.

The official OpenCV installer does not install the Python bindings into your Python directory. There should be a Python2.7 directory inside your OpenCV 2.2.0 installation directory. Copy the whole Lib folder from OpenCV\Python2.7\ to C:\Python27\ and make sure your OpenCV\bin directory is in the Windows DLL search path.

Alternatively use the opencv-python installers at http://www.lfd.uci.edu/~gohlke/pythonlibs/#opencv.

You can add color in the style rule of your input: color:#ccc;

This is a function for calculating max valid length for varchar(Nn):

CREATE FUNCTION [dbo].[GetMaxVarcharColumnLength] (@TableSchema NVARCHAR(MAX), @TableName NVARCHAR(MAX), @ColumnName VARCHAR(MAX))
RETURNS INT
AS
BEGIN
    RETURN (SELECT character_maximum_length FROM information_schema.columns  
            WHERE table_schema = @TableSchema AND table_name = @TableName AND column_name = @ColumnName);
END

Usage:

IF LEN(@Name) > [dbo].[GetMaxVarcharColumnLength]('person', 'FamilyStateName', 'Name') 
            RETURN [dbo].[err_Internal_StringForVarcharTooLong]();

col-lg-4 col-md-6 col-sm-8 col-11 mx-auto

 1. col-lg-4 = 1200px (popular 1366, 1600, 1920+)
 2. col-md-6 = 970px (popular 1024, 1200)
 3. col-sm-8 = 768px (popular 800, 768)
 4. col-11 set default smaller devices for gutter (popular 600,480,414,375,360,312)
 5. mx-auto = always block center

Old question - but I recently needed this along with the row count... here is a query for both - sorted by row count desc:

SELECT t.owner, 
       t.table_name, 
       t.num_rows, 
       Count(*) 
FROM   all_tables t 
       LEFT JOIN all_tab_columns c 
              ON t.table_name = c.table_name 
WHERE  num_rows IS NOT NULL 
GROUP  BY t.owner, 
          t.table_name, 
          t.num_rows 
ORDER  BY t.num_rows DESC; 

The simple answer to this question is that a callback function is a function that is called through a function pointer. If you pass the pointer (address) of a function as an argument to another, when that pointer is used to call the function it points to it is said that a call back is made

I know its late Buy can help someone

This could also happen if you don't add $('#myTable').DataTable(); inside the document.ready

So instead of this

$('#myTable').DataTable();

Try This

$(document).ready(function() {
    $('#myTable').DataTable();
});

In your case, there's no need to iterate through the list, because you know which object to delete. You have several options. First you can remove the object by index (so if you know, that the object is the second list element):

 a.remove(1);       // indexes are zero-based

Then, you can remove the first occurence of your string:

 a.remove("acbd");  // removes the first String object that is equal to the
                    // String represented by this literal

Or, remove all strings with a certain value:

 while(a.remove("acbd")) {}

It's a bit more complicated, if you have more complex objects in your collection and want to remove instances, that have a certain property. So that you can't remove them by using remove with an object that is equal to the one you want to delete.

In those case, I usually use a second list to collect all instances that I want to delete and remove them in a second pass:

 List<MyBean> deleteCandidates = new ArrayList<>();
 List<MyBean> myBeans = getThemFromSomewhere();

 // Pass 1 - collect delete candidates
 for (MyBean myBean : myBeans) {
    if (shallBeDeleted(myBean)) {
       deleteCandidates.add(myBean);
    }
 }

 // Pass 2 - delete
 for (MyBean deleteCandidate : deleteCandidates) {
    myBeans.remove(deleteCandidate);
 }

Json Pointer seem's to be getting growing support too.

I know it's late, I have the same issue with an old custom theme, just added to boostrap.css:

.embed-responsive {
  position: relative;
  display: block;
  height: 0;
  padding: 0;
  overflow: hidden;
}
.embed-responsive .embed-responsive-item,
.embed-responsive iframe,
.embed-responsive embed,
.embed-responsive object,
.embed-responsive video {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
.embed-responsive-16by9 {
  padding-bottom: 56.25%;
}
.embed-responsive-4by3 {
  padding-bottom: 75%;
}

And for the video:

<div class="embed-responsive embed-responsive-16by9" >
<iframe class="embed-responsive-item"  src="https://www.youtube.com/embed/jVIxe3YLNs8"></iframe>
</div>

From an answer of @NimChimpsky in similar question:

Resource resource = new ClassPathResource("storedProcedures.sql");
InputStream resourceInputStream = resource.getInputStream();

Using ClassPathResource and interface Resource. And make sure you are adding the resources directory correctly (adding /src/main/resources/ into the classpath).

Note that Resource have a method to get a java.io.File so you can also use:

Resource resource = new ClassPathResource("storedProcedures.sql");
FileReader fr = new FileReader(resource.getFile());

You can try using the a backslash followed by a "u" and then the unicode value for the character, for example the unicode value of the double quote is

" -> U+0022

Therefore if you were setting it as part of text in XML in android it would look something like this,

<TextView
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:text=" \u0022 Showing double quotes \u0022 "/>

This would produce a text in the TextView roughly something like this

" Showing double quotes "

You can find unicode of most symbols and characters here www.unicode-table.com/en

SOLVED: I got this error when I installed an update to the Git windows installer. What happened is that I did not install it with administrator rights, so Git was installed in "C:\Users\my_name\AppData\Local\Programs" instead of "C:\program Files". re-installing Git as administrator allowed to put it in C:\program Files and everything went fine again !

public static string DataTable2String(DataTable dataTable)
{
    StringBuilder sb = new StringBuilder();
    if (dataTable != null)
    {
        string seperator = " | ";

        #region get min length for columns
        Hashtable hash = new Hashtable();
        foreach (DataColumn col in dataTable.Columns)
            hash[col.ColumnName] = col.ColumnName.Length;
        foreach (DataRow row in dataTable.Rows)
            for (int i = 0; i < row.ItemArray.Length; i++)
                if (row[i] != null)
                    if (((string)row[i]).Length > (int)hash[dataTable.Columns[i].ColumnName])
                        hash[dataTable.Columns[i].ColumnName] = ((string)row[i]).Length;
        int rowLength = (hash.Values.Count + 1) * seperator.Length;
        foreach (object o in hash.Values)
            rowLength += (int)o;
        #endregion get min length for columns

        sb.Append(new string('=', (rowLength - " DataTable ".Length) / 2));
        sb.Append(" DataTable ");
        sb.AppendLine(new string('=', (rowLength - " DataTable ".Length) / 2));
        if (!string.IsNullOrEmpty(dataTable.TableName))
            sb.AppendLine(String.Format("{0,-" + rowLength + "}", String.Format("{0," + ((rowLength + dataTable.TableName.Length) / 2).ToString() + "}", dataTable.TableName)));

        #region write values
        foreach (DataColumn col in dataTable.Columns)
            sb.Append(seperator + String.Format("{0,-" + hash[col.ColumnName] + "}", col.ColumnName));
        sb.AppendLine(seperator);
        sb.AppendLine(new string('-', rowLength));
        foreach (DataRow row in dataTable.Rows)
        {
            for (int i = 0; i < row.ItemArray.Length; i++)
            {
                sb.Append(seperator + String.Format("{0," + hash[dataTable.Columns[i].ColumnName] + "}", row[i]));
                if (i == row.ItemArray.Length - 1)
                    sb.AppendLine(seperator);
            }
        }
        #endregion write values

        sb.AppendLine(new string('=', rowLength));
    }
    else
        sb.AppendLine("================ DataTable is NULL ================");

    return sb.ToString();
}

output:

======================= DataTable =======================
                         MyTable                          
 | COL1 | COL2                    | COL3 1000000ng name | 
----------------------------------------------------------
 |    1 |                       2 |                   3 | 
 |  abc | Dienstag, 12. März 2013 |                 xyz | 
 | Have |                  a nice |                day! | 
==========================================================

I tried a couple of codes, but end up using something as simple as (in Python 3):

from datetime import datetime
df['difference_in_datetime'] = abs(df['end_datetime'] - df['start_datetime'])

If your start_datetime and end_datetime columns are in datetime64[ns] format, datetime understands it and return the difference in days + timestamp, which is in timedelta64[ns] format.

If you want to see only the difference in days, you can separate only the date portion of the start_datetime and end_datetime by using (also works for the time portion):

df['start_date'] = df['start_datetime'].dt.date
df['end_date'] = df['end_datetime'].dt.date

And then run:

df['difference_in_days'] = abs(df['end_date'] - df['start_date'])

In my case:

$('#some_link').click(function(event){
    event.preventDefault();
});

$('#some_link').unbind('click'); worked as the only method to restore the default action.

As seen over here: https://stackoverflow.com/a/1673570/211514

Redmi/xiaomi user

Go to "Settings" -> "Password & security" -> "Privacy" -> "Special app access" -> "Device admin apps" and select the account which you want to uninstall.

Or Simply

go to setting -> Then search for Device admin apps -> click and select the account which you want to uninstall.

This code may help you:

double d = double.Parse(input_value);
string output= d.ToString("F2", CultureInfo.InvariantCulture) + "%";

SELECT INTO

DECLARE
   the_variable NUMBER;

BEGIN
   SELECT my_column INTO the_variable FROM my_table;
END;

Make sure that the query only returns a single row:

By default, a SELECT INTO statement must return only one row. Otherwise, PL/SQL raises the predefined exception TOO_MANY_ROWS and the values of the variables in the INTO clause are undefined. Make sure your WHERE clause is specific enough to only match one row

If no rows are returned, PL/SQL raises NO_DATA_FOUND. You can guard against this exception by selecting the result of an aggregate function, such as COUNT(*) or AVG(), where practical. These functions are guaranteed to return a single value, even if no rows match the condition.

A SELECT ... BULK COLLECT INTO statement can return multiple rows. You must set up collection variables to hold the results. You can declare associative arrays or nested tables that grow as needed to hold the entire result set.

The implicit cursor SQL and its attributes %NOTFOUND, %FOUND, %ROWCOUNT, and %ISOPEN provide information about the execution of a SELECT INTO statement.

json_encode() function will help you to encode array to JSON in php.

if you will use just json_encode function directly without any specific option, it will return an array. Like mention above question

$array = array(
  2 => array("Afghanistan",32,13),
  4 => array("Albania",32,12)
);
$out = array_values($array);
json_encode($out);
// [["Afghanistan",32,13],["Albania",32,12]]

Since you are trying to convert Array to JSON, Then I would suggest to use JSON_FORCE_OBJECT as additional option(parameters) in json_encode, Like below

<?php
$array=['apple','orange','banana','strawberry'];
echo json_encode($array, JSON_FORCE_OBJECT);
// {"0":"apple","1":"orange","2":"banana","3":"strawberry"} 
?>

I tried this on version 7.1.0 and it worked:

$PSVersionTable | Select-Object PSVersion

Output

PSVersion
---------
7.1.0

It doesn't work on version 5.1 though, so rather go for this on versions below 7:

$PSVersionTable.PSVersion

Output

Major  Minor  Build  Revision
-----  -----  -----  --------
5      1      18362  1171

Don't get surprised by the list of answers for a single question. There are various causes for this issue;

For my case, the warning was

warning.js:33 Warning: React.createElement: type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component from the file it's defined in. Check your code at index.js:13.

Followed by the error

invariant.js:42 Uncaught Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component from the file it's defined in.

I couldn't understand the error since it doesn't mention any method or file name. I was able to resolve only after looking at this warning, mentioned above.

I have the following line at the index.js.

<ConnectedRouter history={history}>

When I googled for the above error with the keyword "ConnectedRouter" I found the solution in a GitHub page.

The error is because, when we install react-router-redux package, by default we install this one. https://github.com/reactjs/react-router-redux but not the actual library.

To resolve this error, install the proper package by specifing the npm scope with @

npm install react-router-redux@next

You don't need to remove the wrongly installed package. It will be automatically overwritten.

Thank you.

PS: Even warning helps you. Don't neglect warning just looking at the error alone.

They are two different concepts: "void pointer" is a type (void *). "null pointer" is a pointer that has a value of zero (NULL). Example:

void *pointer = NULL;

That's a NULL void pointer.

Just some thoughts: There are cases when requiring that only one instance of an application is not "lame" as some would have you believe. Database apps, etc. are an order of magnitude more difficult if one allows multiple instances of the app for a single user to access a database (you know, all that updating all the records that are open in multiple instances of the app on the users machine, etc.). First, for the "name collision thing, don't use a human readable name - use a GUID instead or, even better a GUID + the human readable name. Chances of name collision just dropped off the radar and the Mutex doesn't care. As someone pointed out, a DOS attack would suck, but if the malicious person has gone to the trouble of getting the mutex name and incorporating it into their app, you are pretty much a target anyway and will have to do MUCH more to protect yourself than just fiddle a mutex name. Also, if one uses the variant of: new Mutex(true, "some GUID plus Name", out AIsFirstInstance), you already have your indicator as to whether or not the Mutex is the first instance.

A short summary of the above great answers:

git difftool --tool-help
git config --global diff.tool <chosen tool>
git config --global --add difftool.prompt false

Then use it by typing (optionally specifying file name as well):

git difftool

You can compare with the original exception Class using getCause() method like this :

try{
  ...
} catch(Exception e){
   if(e.getCause().getClass().equals(AssertionError.class)){
      // handle your exception  1
   } else {
      // handle the rest of the world exception 
   }
} 

Usinge the file argument in the print function, you can have different files per print:

print('Redirect output to file', file=open('/tmp/example.log', 'w'))

Put the onClick function in the button submit:

<input type="text" id="firstname">
<input type="text" id="lastname">
<input type="submit" value="Submit" onClick="clearform();" />

In the <head>, define the function clearform(), and set the textbox value to "":

function clearform()
{
    document.getElementById("firstname").value=""; //don't forget to set the textbox id
    document.getElementById("lastname").value="";
}

This way the textbox will be cleared when you click the submit button.

Alternative by terminal with no permission

The pg documentation at NOTES say

The path will be interpreted relative to the working directory of the server process (normally the cluster's data directory), not the client's working directory.

So, gerally, using psql or any client, even in a local server, you have problems ... And, if you're expressing COPY command for other users, eg. at a Github README, the reader will have problems ...

The only way to express relative path with client permissions is using STDIN,

When STDIN or STDOUT is specified, data is transmitted via the connection between the client and the server.

as remembered here:

psql -h remotehost -d remote_mydb -U myuser -c \
   "copy mytable (column1, column2) from STDIN with delimiter as ','" \
   < ./relative_path/file.csv

If you're only interested in the keys, you can iterate through the keySet() of the map:

Map<String, Object> map = ...;

for (String key : map.keySet()) {
    // ...
}

If you only need the values, use values():

for (Object value : map.values()) {
    // ...
}

Finally, if you want both the key and value, use entrySet():

for (Map.Entry<String, Object> entry : map.entrySet()) {
    String key = entry.getKey();
    Object value = entry.getValue();
    // ...
}

One caveat: if you want to remove items mid-iteration, you'll need to do so via an Iterator (see karim79's answer). However, changing item values is OK (see Map.Entry).

Edit: EF Core 2.1 finally supports GroupBy

But always look out in the console / log for messages. If you see a notification that your query could not be converted to SQL and will be evaluated locally then you may need to rewrite it.

Entity Framework 7 (now renamed to Entity Framework Core 1.0 / 2.0) does not yet support GroupBy() for translation to GROUP BY in generated SQL (even in the final 1.0 release it won't). Any grouping logic will run on the client side, which could cause a lot of data to be loaded.

Eventually code written like this will automagically start using GROUP BY, but for now you need to be very cautious if loading your whole un-grouped dataset into memory will cause performance issues.

For scenarios where this is a deal-breaker you will have to write the SQL by hand and execute it through EF.

If in doubt fire up Sql Profiler and see what is generated - which you should probably be doing anyway.

https://blogs.msdn.microsoft.com/dotnet/2016/05/16/announcing-entity-framework-core-rc2

After banging my had against my desk for a few hours trying to figure this out, somehow my "Main" method got emptied of it's code!

ServiceBase[] ServicesToRun;
ServicesToRun = new ServiceBase[] 
{ 
    new DMTestService()
};
ServiceBase.Run(ServicesToRun);

Other solutions I found:

• Updating the .NET framework to 4.0

• Making sure the service name inside the InitializeComponent() matches the installer service name property

  private void InitializeComponent()
  ...
  this.ServiceName = "DMTestService";
  

• And a nice server restart doesn't hurt

Szhlopp

The Best way is to create a user for your application and assign the permissions that are suitable for that user. Dont use 'NT AUTHORITY\NETWORK SERVICE' as your user it has its own vulnerability and it is a user that has permissions to so many things on the OS level. Stay away from this built in user.

One way is:

application arg0 arg1 > temp.txt
set /p VAR=<temp.txt

Another is:

for /f %%i in ('application arg0 arg1') do set VAR=%%i

Note that the first % in %%i is used to escape the % after it and is needed when using the above code in a batch file rather than on the command line. Imagine, your test.bat has something like:

for /f %%i in ('c:\cygwin64\bin\date.exe +"%%Y%%m%%d%%H%%M%%S"') do set datetime=%%i
echo %datetime%

Swift 5
This handy extension handles few more cases than previous answers. These cases are VC(view controller) is the root VC of app window, VC is added as child to parent VC. It tries to return true only if the viewcontroller is modally presented.

extension UIViewController {
    /**
      returns true only if the viewcontroller is presented.
    */
    var isModal: Bool {
        if let index = navigationController?.viewControllers.firstIndex(of: self), index > 0 {
            return false
        } else if presentingViewController != nil {
            if let parent = parent, !(parent is UINavigationController || parent is UITabBarController) {
                return false
            }
            return true
        } else if let navController = navigationController, navController.presentingViewController?.presentedViewController == navController {
            return true
        } else if tabBarController?.presentingViewController is UITabBarController {
            return true
        }
        return false
    }
}

Thanks to Jonauz's answer. Again there is space for more optimizations. Please discuss about case that need to be handled in comment section.

The shorter ES6 version of the answer:

const delay = t => new Promise(resolve => setTimeout(resolve, t));

And then you can do:

delay(3000).then(() => console.log('Hello'));

window.location.reload() or just location.reload()

above solutions are very true...but the UI dialog does not retain the position after window is resized. below code does this

            $(document).ready(function(){

                $(".test").click(function(){
                            var posX = $(".test").offset().left - $(document).scrollLeft() + $(".test").outerWidth();
                            var posY = $(".test").offset().top - $(document).scrollTop() + $(".test").outerHeight();
                            console.log("in click function");
                            $(".abc").dialog({
                                position:[posX,posY]
                            });

                        })

            })

            $(window).resize(function(){
                var posX=$(".test").offset().left - $(document).scrollLeft() + $(".test").outerWidth();
                var posY = $(".test").offset().top - $(document).scrollTop() + $(".test").outerHeight();

            $(".abc").dialog({
                                position:[posX,posY]
                            });
            })

I think you can get away by just installing the OLEDB Drivers - http://www.microsoft.com/en-us/download/details.aspx?id=13255

what jamietre said, but

Private Sub SomeVBASub
    Cancel=False
    DoStuff
    If not Cancel Then DoAnotherStuff
    If not Cancel Then AndFinallyDothis
End Sub

Simple One-line Solution

As suggested in many of above answers, for example

• https://stackoverflow.com/a/29938139/9640177
• https://stackoverflow.com/a/26118045/9640177
• https://stackoverflow.com/a/50775459/9640177
• https://stackoverflow.com/a/41057024/9640177

Simply getting navigation bar height may not be enough. We need to consider whether 1. navigation bar exists, 2. is it on the bottom, or right or left, 3. is app open in multi-window mode.

Fortunately you can easily bypass all the long coding by simply setting android:fitsSystemWindows="true" in your root layout. Android system will automatically take care of adding necessary padding to the root layout to make sure that the child views don't get into the navigation bar or statusbar regions.

There is a simple one line solution

android:fitsSystemWindows="true"

or programatically

findViewById(R.id.your_root_view).setFitsSystemWindows(true);

you may also get root view by

findViewById(android.R.id.content).getRootView();
or
getWindow().getDecorView().findViewById(android.R.id.content)

For more details on getting root-view refer - https://stackoverflow.com/a/4488149/9640177

add_index :table_name, :column_name, unique: true

To index multiple columns together, you pass an array of column names instead of a single column name.

Use the S3FileSystem.rm function in s3fs.

You can delete a single file or several at once:

import s3fs
file_system = s3fs.S3FileSystem()

file_system.rm('s3://my-bucket/foo.txt')  # single file

files = ['s3://my-bucket/bar.txt', 's3://my-bucket/baz.txt']
file_system.rm(files)  # several files

In order to include a global library, eg jquery.js file in the scripts array from angular-cli.json (angular.json when using angular 6+):

"scripts": [
  "../node_modules/jquery/dist/jquery.js"
]

After this, restart ng serve if it is already started.

similar to substr('abcdefg', 2-1, 3) in php:

echo 'abcdefg'|tail -c +2|head -c 3

I would take those directions to mean:

  function makeGamePlayer(name,totalScore,gamesPlayed) {
        //should return an object with three keys:
        // name
        // totalScore
        // gamesPlayed

         var obj = {  //note you don't use = in an object definition
             "name": name,
             "totalScore": totalScore,
             "gamesPlayed": gamesPlayed
          }
         return obj;
    }

This is how I managed to install psycopg2

$ wget http://initd.org/psycopg/tarballs/PSYCOPG-2-5/psycopg2-2.5.3.tar.gz
$ tar -xzf psycopg2-2.5.3.tar.gz
$ cd psycopg2-2.5.3
$ pip install .

1. Edit service.bat – Swap two lines so that they appear in following order: if not “%JAVA_HOME%“ == ““ goto got JdkHome if not “%JRE_HOME%“ == ““ goto got JreHome
2. Open cmd and run command service.bat install
3. Open Services and find Apache Tomcat 7.0 Tomcat7. Right click and Properties. Change its startup type to Automatic (with delay).
4. Reboot machine to verify if the service started automatically

just to add a detail to what Tamlyn wrote, instead of
$('form').get(0).setAttribute('action', 'baz'); //this works

$('form')[0].setAttribute('action', 'baz');
works equally well

You shouldn't do that and that's not possible anyway, If you want you can set a greater value such as 10 years ahead.

By the way, I have never seen a cookie with such requirement :)

In my case, the main project was still referencing an old version of Newtonsoft.Json which didn't exists in the project any more (shown by a yellow exclamation mark). Removing the reference solved the problem, no bindingRedirect was necessary.

For multidimensional array

$data = array_map('array_filter', $data);
$data = array_filter($data);

The standard way to parse JSON in JavaScript is JSON.parse()

The JSON API was introduced with ES5 (2011) and has since been implemented in >99% of browsers by market share, and Node.js. Its usage is simple:

const json = '{ "fruit": "pineapple", "fingers": 10 }';
const obj = JSON.parse(json);
console.log(obj.fruit, obj.fingers);

The only time you won't be able to use JSON.parse() is if you are programming for an ancient browser, such as IE 7 (2006), IE 6 (2001), Firefox 3 (2008), Safari 3.x (2009), etc. Alternatively, you may be in an esoteric JavaScript environment that doesn't include the standard APIs. In these cases, use json2.js, the reference implementation of JSON written by Douglas Crockford, the inventor of JSON. That library will provide an implementation of JSON.parse().

When processing extremely large JSON files, JSON.parse() may choke because of its synchronous nature and design. To resolve this, the JSON website recommends third-party libraries such as Oboe.js and clarinet, which provide streaming JSON parsing.

jQuery once had a $.parseJSON() function, but it was deprecated with jQuery 3.0. In any case, for a long time, it was nothing more than a wrapper around JSON.parse().

You're already doing it correctly, it just that the <h4>Facebook</h4> tag is taking too much vertical margin. You can remove it by using the style margin:0px on the <h4> tag.

For your future convenience, you can put border (border:1px solid black) on your elements to see which part you actually get it wrong.

I just came across a similar problem. Try

require './st.rb'

This should do the trick.

Hi I add key and value to each object

let persons = [_x000D_
  {_x000D_
    name : "John Doe Sr",_x000D_
    age: 30_x000D_
  },{_x000D_
    name: "John Doe Jr",_x000D_
    age : 5_x000D_
  }_x000D_
]_x000D_
_x000D_
function addKeyValue(obj, key, data){_x000D_
  obj[key] = data;_x000D_
}_x000D_
 _x000D_
_x000D_
let newinfo = persons.map(function(person) {_x000D_
  return addKeyValue(person, 'newKey', 'newValue');_x000D_
});_x000D_
_x000D_
console.log(persons);

try this

<div ng-app="myApp" ng-controller="customersCtrl"> 
  <div ng-include="'myTable.htm'"></div>
</div>

<script>
var app = angular.module('myApp', []);
app.controller('customersCtrl', function($scope, $http) {
    $http.get("customers.php").then(function (response) {
        $scope.names = response.data.records;
    });
});
</script>

You don't need initialization lists for that:

std::vector<int> vector1(length, 0);
std::vector<double> vector2(length, 0.0);

You can use JSONPath

Doing something like this:

results = JSONPath(null, TestObj, "$..[?(@.id=='A')]")

Note that JSONPath returns an array of results

(I have not tested the expression "$..[?(@.id=='A')]" btw. Maybe it needs to be fine-tuned with the help of a browser console)

To retrieve the entire querystring from the current URL, beginning with the ? character, you can use

location.search

https://developer.mozilla.org/en-US/docs/DOM/window.location

Example:

// URL = https://example.com?a=a%20a&b=b123
console.log(location.search); // Prints "?a=a%20a&b=b123" 

In regards to retrieving specific querystring parameters, while although classes like URLSearchParams and URL exist, they aren't supported by Internet Explorer at this time, and should probably be avoided. Instead, you can try something like this:

/**
 * Accepts either a URL or querystring and returns an object associating 
 * each querystring parameter to its value. 
 *
 * Returns an empty object if no querystring parameters found.
 */
function getUrlParams(urlOrQueryString) {
  if ((i = urlOrQueryString.indexOf('?')) >= 0) {
    const queryString = urlOrQueryString.substring(i+1);
    if (queryString) {
      return _mapUrlParams(queryString);
    } 
  }

  return {};
}

/**
 * Helper function for `getUrlParams()`
 * Builds the querystring parameter to value object map.
 *
 * @param queryString {string} - The full querystring, without the leading '?'.
 */
function _mapUrlParams(queryString) {
  return queryString    
    .split('&') 
    .map(function(keyValueString) { return keyValueString.split('=') })
    .reduce(function(urlParams, [key, value]) {
      if (Number.isInteger(parseInt(value)) && parseInt(value) == value) {
        urlParams[key] = parseInt(value);
      } else {
        urlParams[key] = decodeURI(value);
      }
      return urlParams;
    }, {});
}

You can use the above like so:

// Using location.search
let urlParams = getUrlParams(location.search); // Assume location.search = "?a=1&b=2b2"
console.log(urlParams); // Prints { "a": 1, "b": "2b2" }

// Using a URL string
const url = 'https://example.com?a=A%20A&b=1';
urlParams = getUrlParams(url);
console.log(urlParams); // Prints { "a": "A A", "b": 1 }

// To check if a parameter exists, simply do:
if (urlParams.hasOwnProperty('parameterName') { 
  console.log(urlParams.parameterName);
}

I had from a totaly different reason the same notice "Value does not fall within the expected range" from the Visual studio 2008 while trying to use the: Tools -> Windows Embedded Silverlight Tools -> Update Silverlight For Windows Embedded Project.

After spending many ohurs I found out that the problem was that there wasn't a resource file and the update tool looks for the .RC file

Therefor the solution is to add to the resource folder a .RC file and than it works perfectly. I hope it will help someone out there

There are multiple approaches you can use:

1. df1=df.withColumn("new_column","old_column").drop(col("old_column"))

2. df1=df.withColumn("new_column","old_column")

3. df1=df.select("old_column".alias("new_column"))

There are a lot of answers here, but I'll add my approach since I found this post while working on the same problem.

Starting with what we know here are the number from 0 to 16.

Number           encoded in bits         minimum number of bits to encode
0                000000                  1
1                000001                  1
2                000010                  2
3                000011                  2
4                000100                  3
5                000101                  3
6                000110                  3
7                000111                  3
8                001000                  4
9                001001                  4
10               001010                  4
11               001011                  4
12               001100                  4
13               001101                  4
14               001110                  4
15               001111                  4
16               010000                  5

looking at the breaks, it shows this table

number <=       number of bits
1               0
3               2
7               3
15              4

So, now how do we compute the pattern?

Remember that log base 2 (n) = log base 10 (n) / log base 10 (2)

number    logb10 (n)   logb2 (n)   ceil[logb2(n)] 
1         0            0           0           (special case)
3         0.477        1.58        2
7         0.845        2.807       3  
8         0.903        3           3           (special case)
15        1.176        3.91        4
16        1.204        4           4           (special case)
31        1.491        4.95        5
63        1.799        5.98        6

Now the desired result matching the first table. Notice how also some values are special cases. 0 and any number which is a powers of 2. These values dont change when you apply ceiling so you know you need to add 1 to get the minimum bit field length.

To account for the special cases add one to the input. The resulting code implemented in python is:

from math import log
from math import ceil
def min_num_bits_to_encode_number(a_number):
    a_number=a_number+1  # adjust by 1 for special cases

    # log of zero is undefined
    if 0==a_number:
        return 0
    num_bits = int(ceil(log(a_number,2)))  # logbase2 is available
    return (num_bits)

Accessing direct properties and related are explained

// Get an instance of the WC_Order object
            $order = wc_get_order($order_id);
            $order_data = array(
                    'order_id' => $order->get_id(),
                    'order_number' => $order->get_order_number(),
                    'order_date' => date('Y-m-d H:i:s', strtotime(get_post($order->get_id())->post_date)),
                    'status' => $order->get_status(),
                    'shipping_total' => $order->get_total_shipping(),
                    'shipping_tax_total' => wc_format_decimal($order->get_shipping_tax(), 2),
                    'fee_total' => wc_format_decimal($fee_total, 2),
                    'fee_tax_total' => wc_format_decimal($fee_tax_total, 2),
                    'tax_total' => wc_format_decimal($order->get_total_tax(), 2),
                    'cart_discount' => (defined('WC_VERSION') && (WC_VERSION >= 2.3)) ? wc_format_decimal($order->get_total_discount(), 2) : wc_format_decimal($order->get_cart_discount(), 2),
                    'order_discount' => (defined('WC_VERSION') && (WC_VERSION >= 2.3)) ? wc_format_decimal($order->get_total_discount(), 2) : wc_format_decimal($order->get_order_discount(), 2),
                    'discount_total' => wc_format_decimal($order->get_total_discount(), 2),
                    'order_total' => wc_format_decimal($order->get_total(), 2),
                    'order_currency' => $order->get_currency(),
                    'payment_method' => $order->get_payment_method(),
                    'shipping_method' => $order->get_shipping_method(),
                    'customer_id' => $order->get_user_id(),
                    'customer_user' => $order->get_user_id(),
                    'customer_email' => ($a = get_userdata($order->get_user_id() )) ? $a->user_email : '',
                    'billing_first_name' => $order->get_billing_first_name(),
                    'billing_last_name' => $order->get_billing_last_name(),
                    'billing_company' => $order->get_billing_company(),
                    'billing_email' => $order->get_billing_email(),
                    'billing_phone' => $order->get_billing_phone(),
                    'billing_address_1' => $order->get_billing_address_1(),
                    'billing_address_2' => $order->get_billing_address_2(),
                    'billing_postcode' => $order->get_billing_postcode(),
                    'billing_city' => $order->get_billing_city(),
                    'billing_state' => $order->get_billing_state(),
                    'billing_country' => $order->get_billing_country(),
                    'shipping_first_name' => $order->get_shipping_first_name(),
                    'shipping_last_name' => $order->get_shipping_last_name(),
                    'shipping_company' => $order->get_shipping_company(),
                    'shipping_address_1' => $order->get_shipping_address_1(),
                    'shipping_address_2' => $order->get_shipping_address_2(),
                    'shipping_postcode' => $order->get_shipping_postcode(),
                    'shipping_city' => $order->get_shipping_city(),
                    'shipping_state' => $order->get_shipping_state(),
                    'shipping_country' => $order->get_shipping_country(),
                    'customer_note' => $order->get_customer_note(),
                    'download_permissions' => $order->is_download_permitted() ? $order->is_download_permitted() : 0,
            );

Additional details

  $line_items_shipping = $order->get_items('shipping');
            foreach ($line_items_shipping as $item_id => $item) {
                if (is_object($item)) {
                    if ($meta_data = $item->get_formatted_meta_data('')) :
                        foreach ($meta_data as $meta_id => $meta) :
                            if (in_array($meta->key, $line_items_shipping)) {
                                continue;
                            }
                            // html entity decode is not working preoperly
                            $shipping_items[] = implode('|', array('item:' . wp_kses_post($meta->display_key), 'value:' . str_replace('×', 'X', strip_tags($meta->display_value))));
                        endforeach;
                    endif;
                }
            }

            //get fee and total
            $fee_total = 0;
            $fee_tax_total = 0;

            foreach ($order->get_fees() as $fee_id => $fee) {

                $fee_items[] = implode('|', array(
                        'name:' .  html_entity_decode($fee['name'], ENT_NOQUOTES, 'UTF-8'),
                        'total:' . wc_format_decimal($fee['line_total'], 2),
                        'tax:' . wc_format_decimal($fee['line_tax'], 2),
                ));

                $fee_total += $fee['line_total'];
                $fee_tax_total += $fee['line_tax'];
            }

            // get tax items
            foreach ($order->get_tax_totals() as $tax_code => $tax) {            
                $tax_items[] = implode('|', array(
                    'rate_id:'.$tax->id,
                    'code:' . $tax_code,
                    'total:' . wc_format_decimal($tax->amount, 2),
                    'label:'.$tax->label,                
                    'tax_rate_compound:'.$tax->is_compound,
                ));
            }

            // add coupons
            foreach ($order->get_items('coupon') as $_ => $coupon_item) {

                $coupon = new WC_Coupon($coupon_item['name']);

                $coupon_post = get_post((WC()->version < '2.7.0') ? $coupon->id : $coupon->get_id());
                $discount_amount = !empty($coupon_item['discount_amount']) ? $coupon_item['discount_amount'] : 0;
                $coupon_items[] = implode('|', array(
                        'code:' . $coupon_item['name'],
                        'description:' . ( is_object($coupon_post) ? $coupon_post->post_excerpt : '' ),
                        'amount:' . wc_format_decimal($discount_amount, 2),
                ));
            }

            foreach ($order->get_refunds() as $refunded_items){
                $refund_items[] = implode('|', array(
                    'amount:' . $refunded_items->get_amount(),
            'reason:' . $refunded_items->get_reason(),
                    'date:'. date('Y-m-d H-i-s',strtotime((WC()->version < '2.7.0') ? $refunded_items->date_created : $refunded_items->get_date_created())),
                ));
            }

Checkbox text may be not aligning to left with

android:button="@null"
android:drawableRight="@android:drawable/btn_radio"

in some device. Can use CheckedTextView as a replacement to avoid the problem,

<CheckedTextView
    ...
    android:checkMark="@android:drawable/btn_radio" />

and this link will be helpful: Align text left, checkbox right

In Xamarin Forms this worked for me. Just add this on AppDelegate.cs:

UINavigationBar.Appearance.ShadowImage = new UIImage();

To use ASCII with accents:

var str = str.replace(/[^\x00-\xFF]/g, "");

You can easily make your own 'AlertView' and use it everywhere.

alertView("You really want this?");

Implement it once:

private void alertView( String message ) {
 AlertDialog.Builder dialog = new AlertDialog.Builder(context);
 dialog.setTitle( "Hello" )
       .setIcon(R.drawable.ic_launcher)
       .setMessage(message)
//     .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
//      public void onClick(DialogInterface dialoginterface, int i) {
//          dialoginterface.cancel();   
//          }})
      .setPositiveButton("Ok", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialoginterface, int i) {   
        }               
        }).show();
 }

Only thing worked for me.

Open the project -> Select your target -> Go to Build Settings -> Search PROVISIONING and delete the selected profiles.

In my XFCE (version 4.12), it's in Settings -> Window Manager Tweaks -> Accessibility.

There's a dropdown field Key used to grab and move windows:, set this to None.

Alt + Click works now in VS Code to add more cursor.

I had the same problem when I submitted data using jQuery AJAX:

$.ajax({
   url:...
   success:function(data){
      //server response's data is JSON
      //I use jQuery's parseJSON method 
      $.parseJSON(data);//it's ERROR
   }
});

If the response is JSON, and you use this method, the data you get is a JavaScript object, but if you use dataType:"text", data is a JSON string. Then the use of $.parseJSON is okay.

Use this

x = Object.create(x1);

x and x1 will be two different object,change in x will not change x1

The comment by jsz above saved me tons of pain, so here's a step-by-step recipie based on it that I've been using to rebase/move any commit on top of any other commit:

1. Find a previous branching point of the branch to be rebased (moved) - call it old parent. In the example above that's A
2. Find commit on top of which you want to move the branch to - call it new parent. In the exampe that's B
3. You need to be on your branch (the one you move):
4. Apply your rebase: git rebase --onto <new parent> <old parent>

In the example above that's as simple as:

   git checkout topic
   git rebase --onto B A

Simply use RelativeLayout or FrameLayout. The last child view will overlay everything else.

Android supports a pattern which Cocoa Touch SDK doesn't: Layout management.
Layout for iPhone means to position everything absolute (besides some strech factors). Layout in android means that children will be placed in relation to eachother.

Example (second EditText will completely cover the first one):

<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:id="@+id/root_view">

    <EditText
        android:layout_width="fill_parent"
        android:id="@+id/editText1"
        android:layout_height="fill_parent">
    </EditText>

    <EditText
        android:layout_width="fill_parent"
        android:id="@+id/editText2"
        android:layout_height="fill_parent">
        <requestFocus></requestFocus>
    </EditText>

</FrameLayout>

FrameLayout is some kind of view stack. Made for special cases.

RelativeLayout is pretty powerful. You can define rules like View A has to align parent layout bottom, View B has to align A bottom to top, etc

Update based on comment

Usually you set the content with setContentView(R.layout.your_layout) in onCreate (it will inflate the layout for you). You can do that manually and call setContentView(inflatedView), there's no difference.

The view itself might be a single view (like TextView) or a complex layout hierarchy (nested layouts, since all layouts are views themselves).

After calling setContentView your activity knows what its content looks like and you can use (FrameLayout) findViewById(R.id.root_view) to retrieve any view int this hierarchy (General pattern (ClassOfTheViewWithThisId) findViewById(R.id.declared_id_of_view)).

Adding to @Luca Davanzo

iOS 11, some permissions settings have moved to the app path:

iOS 11 Support

 static func open(_ preferenceType: PreferenceType) throws {
    var preferencePath: String
    if #available(iOS 11.0, *), preferenceType == .video || preferenceType == .locationServices || preferenceType == .photos {
        preferencePath = UIApplicationOpenSettingsURLString
    } else {
        preferencePath = "\(PreferencesExplorer.preferencePath)=\(preferenceType.rawValue)"
    }

    if let url = URL(string: preferencePath) {
        if #available(iOS 10.0, *) {
            UIApplication.shared.open(url, options: [:], completionHandler: nil)
        } else {
            UIApplication.shared.openURL(url)
        }
    } else {
        throw PreferenceExplorerError.notFound(preferencePath)
    }
}

It works fine : http://codepad.org/5KgO0b1G, your aSourceDictionary variable may have other datatype than dict

aSourceDictionary = { 'abc' : [1,2,3] , 'ccd' : [4,5] }
aTargetDictionary = {}
for aKey in aSourceDictionary:
        aTargetDictionary[aKey] = []
        aTargetDictionary[aKey].extend(aSourceDictionary[aKey])
print aTargetDictionary

You can use this too:

<?php
    $youtube_view_count = json_decode(file_get_contents('http://gdata.youtube.com/feeds/api/videos/wGG543FeHOE?v=2&alt=json'))->entry->{'yt$statistics'}->viewCount;
    echo $youtube_view_count;
    ?>

Stream is just an abstraction (or a wrapper) over a physical stream of bytes. This physical stream is called the base stream. So there is always a base stream over which a stream wrapper is created and thus the wrapper is named after the base stream type ie FileStream, MemoryStream etc.

The advantage of the stream wrapper is that you get a unified api to interact with streams of any underlying type usb, file etc.

Why would you treat data as stream - because data chunks are loaded on-demand, we can inspect/process the data as chunks rather than loading the entire data into memory. This is how most of the programs deal with big files, for eg encrypting an OS image file.

I've needed to do testing of an insert-heavy application in both MyISAM and InnoDB simultaneously. There was a single setting that resolved the speed issues I was having. Try setting the following:

innodb_flush_log_at_trx_commit = 2

Make sure you understand the risks by reading about the setting here.

Also see https://dba.stackexchange.com/questions/12611/is-it-safe-to-use-innodb-flush-log-at-trx-commit-2/12612 and https://dba.stackexchange.com/a/29974/9405

Thanks for that info on the ControlToValidate LukeH!

What I was trying to do in my code was to only ensure that some text field A has some text in the field when text field B has a particular value. Otherwise, A can be blank or whatever else. Getting rid of the ControlToValidate="A" in my mark up fixed the issue for me.

Cheers!

Recommending SequenceEqual is ok, but thinking that it may ever be faster than usual for(;;) loop is too naive.

Here is the reflected code:

public static bool SequenceEqual<TSource>(this IEnumerable<TSource> first, 
    IEnumerable<TSource> second, IEqualityComparer<TSource> comparer)
{
    if (comparer == null)
    {
        comparer = EqualityComparer<TSource>.Default;
    }
    if (first == null)
    {
        throw Error.ArgumentNull("first");
    }
    if (second == null)
    {
        throw Error.ArgumentNull("second");
    }
    using (IEnumerator<TSource> enumerator = first.GetEnumerator())     
    using (IEnumerator<TSource> enumerator2 = second.GetEnumerator())
    {
        while (enumerator.MoveNext())
        {
            if (!enumerator2.MoveNext() || !comparer.Equals(enumerator.Current, enumerator2.Current))
            {
                return false;
            }
        }
        if (enumerator2.MoveNext())
        {
            return false;
        }
    }
    return true;
}

As you can see it uses 2 enumerators and fires numerous method calls which seriously slow everything down. Also it doesn't check length at all, so in bad cases it can be ridiculously slower.

Compare moving two iterators with beautiful

if (a1[i] != a2[i])

and you will know what I mean about performance.

It can be used in cases where performance is really not so critical, maybe in unit test code, or in cases of some short list in rarely called methods.

I recently got the same error when trying to load scipy in jupyter (python3.x, win10), although just having upgraded to numpy-1.13.3+mkl through pip. The solution was to simply upgrade the scipy package (from v0.19 to v1.0.0).

You should use Node.contains, since it's now standard and available in all browsers.

https://developer.mozilla.org/en-US/docs/Web/API/Node.contains

I suggest the following to make sure everything is uninstalled:

sudo apt-get purge mongodb mongodb-clients mongodb-server mongodb-dev

sudo apt-get purge mongodb-10gen

sudo apt-get autoremove

This should also remove your config from

 /etc/mongodb.conf.

If you want to clean up completely and you might also want to remove the data directory

/var/lib/mongodb

One of the possible solutions is:

const names = {
afshin: 'afshin',
saeed: 'saeed',
larry: 'larry'
};

switch (varName) {
   case names[varName]: {
       alert('Hey');
       break;
   }

   default: {
       alert('Default case');
       break;
   }
}

This is quicker:

<ESC>GA

From http://www.postgresql.org/docs/current/interactive/datatype.html

Note: Prior to PostgreSQL 7.3, serial implied UNIQUE. This is no longer automatic. If you wish a serial column to be in a unique constraint or a primary key, it must now be specified, same as with any other data type.

Almost there. In your predicate, you want a relative path, so change

./book[/author/name = 'John'] 

to either

./book[author/name = 'John'] 

or

./book[./author/name = 'John'] 

and you will match your element. Your current predicate goes back to the root of the document to look for an author.

I would use:

if (Stream.of("a","b","c").anyMatch("a"::equals)) {
    //Code to execute
};

or:

Stream.of("a","b","c")
    .filter("a"::equals)
    .findAny()
    .ifPresent(ignore -> /*Code to execute*/);

You cannot determine the encoding of a arbitrary byte stream. This is the nature of encodings. A encoding means a mapping between a byte value and its representation. So every encoding "could" be the right.

The getEncoding() method will return the encoding which was set up (read the JavaDoc) for the stream. It will not guess the encoding for you.

Some streams tell you which encoding was used to create them: XML, HTML. But not an arbitrary byte stream.

Anyway, you could try to guess an encoding on your own if you have to. Every language has a common frequency for every char. In English the char e appears very often but ê will appear very very seldom. In a ISO-8859-1 stream there are usually no 0x00 chars. But a UTF-16 stream has a lot of them.

Or: you could ask the user. I've already seen applications which present you a snippet of the file in different encodings and ask you to select the "correct" one.

The best colors I've found --which aside from being so beautiful, are very easy to look at too and do not boil my eyes-- are the ones I've found listed in this GitHub repository: VSCode Snazzy

Very Easy Installation:

Copy the contents of snazzy.json into your VS Code "settings.json" file.

(In case you don't know how to open the "settings.json" file, first hit Ctrl+Shift+P and then write Preferences: open settings(JSON) and hit enter).

Notice: For those who have tried ColorTool and it works outside VSCode but not inside VSCode, you've made no mistakes in implementing it, that's just a decision of VSCode developers for the VSCode's terminal to be colored independently.

I'm jumping in here a little late, but came across this page when pondering it myself. Of course I don't know how Facebook or Twitter justified it, but here is my own thought process for what it's worth.

In the end, I concluded that this practice is not that unsemantic (is that a word?). In fact, besides shortness and the nice association of "i is for icon," I think it's actually the most semantic choice for an icon when a straightforward <img> tag is not practical.

1. The usage is consistent with the spec.

While it may not be what the W3 mainly had in mind, it seems to me the official spec for <i> could accommodate an icon pretty easily. After all, the reply-arrow symbol is saying "reply" in another way. It expresses a technical term that may be unfamiliar to the reader and would be typically italicized. ("Here at Twitter, this is what we call a reply arrow.") And it is a term from another language: a symbolic language.

If, instead of the arrow symbol, Twitter used <i>shout out</i> or <i>[Japanese character for reply]</i> (on an English page), that would be consistent with the spec. Then why not <i>[reply arrow]</i>? (I'm talking strictly HTML semantics here, not accessibility, which I'll get to.)

As far as I can see, the only part of the spec explicitly violated by icon usage is the "span of text" phrase (when the tag doesn't contain text also). It is clear that the <i> tag is mainly meant for text, but that's a pretty small detail compared with the overall intent of the tag. The important question for this tag is not what format of content it contains, but what the meaning of that content is.

This is especially true when you consider that the line between "text" and "icon" can be almost nonexistent on websites. Text may look like more like an icon (as in the Japanese example) or an icon may look like text (as in a jpg button that says "Submit" or a cat photo with an overlaid caption) or text may be replaced or enhanced with an image via CSS. Text, image - who cares? It's all content. As long as everyone - humans with impairments, browsers with impairments, search engine spiders, and other machines of various kinds can understand that meaning, we've done our job.

So the fact that the writers of the spec didn't think (or choose) to clarify this shouldn't tie our hands from doing what makes sense and is consistent with the spirit of the tag. The <a> tag was originally intended to take the user somewhere else, but now it might pop up a lightbox. Big whoop, right? If someone had figured out how to pop up a lightbox on click before the spec caught up, they still should have used the <a> tag, not a <span>, even if it wasn't entirely consistent with the current definition - because it came the closest and was still consistent with the spirit of the tag ("something will happen when you click here"). Same deal with <i> - whatever type of thing you put inside it, or however creatively you use it, it expresses the general idea of an alternate or set-apart term.

2. The <i> tag adds semantic meaning to an icon element.

The alternative option to carry an icon class by itself is <span>, which of course has no semantic meaning whatsoever. When a machine asks the <span> what it contains, it says, "I don't know. Could be anything." But the <i> tag says, "I contain a different way of saying something than the usual way, or maybe an unfamiliar term." That's not the same as "I contain an icon," but it's a lot closer to it than <span> got!

3. Eventually, common usage makes right.

In addition to the above, it's worth considering that machine readers (whether search engine, screen reader, or whatever) may at any time begin to take into account that Facebook, Twitter, and other websites use the <i> tag for icons. They don't care about the spec as much as they care about extracting meaning from code by whatever means necessary. So they might use this knowledge of common usage to simply record that "there may be an icon here" or do something more advanced like triggering a look into the CSS for a hint to meaning, or who knows what. So if you choose to use the <i> for icons on your website, you may be providing more meaning than the spec does.

Moreover, if this usage becomes widespread, it will likely be included in the spec in the future. Then you'll be going through your code, replacing <span>s with <i>'s! So it may make sense to get on board with what seems to be the direction of the spec, especially when it doesn't clearly conflict with the current spec. Common usage tends to dictate language rules more than the other way around. If you're old enough, do you remember that "Web site" was the official spelling when the word was new? Dictionaries insisted there must be a space and Web must be capitalized. There were semantic reasons for that. But common usage said, "Whatever, that's stupid. I'm using 'website' because it's more concise and looks better." And before long, dictionaries officially acknowledged that spelling as correct.

4. So I'm going ahead and using it.

So, <i> provides more meaning to machines because of the spec, it provides more meaning to humans because we easily associate "i" with "icon", and it's only one letter long. Win! And if you make sure to include equivalent text either inside the <i> tag or right next to it (as Twitter does), then screen readers understand where to click to reply, the link is usable if CSS doesn't load, and human readers with good eyesight and a decent browser see a pretty icon. With all this in mind, I don't see the downside.

Use the Bootstrap 4 h-100 class for height:100%;

<div class="container-fluid h-100">
  <div class="row justify-content-center h-100">
    <div class="col-4 hidden-md-down" id="yellow">
      XXXX
    </div>
    <div class="col-10 col-sm-10 col-md-10 col-lg-8 col-xl-8">
      Form Goes Here
    </div>
  </div>
</div>

https://www.codeply.com/go/zxd6oN1yWp

You'll also need ensure any parent(s) are also 100% height (or have a defined height)...

html,body {
  height: 100%;
}

Note: 100% height is not the same as "remaining" height.

Related: Bootstrap 4: How to make the row stretch remaining height?

On Python 3 you can use the itertools islice to slice the dict.items() iterator

import itertools

d = {1: 2, 3: 4, 5: 6}

dict(itertools.islice(d.items(), 2))

{1: 2, 3: 4}

Note: this solution does not take into account specific keys. It slices by internal ordering of d, which in Python 3.7+ is guaranteed to be insertion-ordered.

It looks like you want the return keyword

def check_ping():
    hostname = "taylor"
    response = os.system("ping -c 1 " + hostname)
    # and then check the response...
    if response == 0:
        pingstatus = "Network Active"
    else:
        pingstatus = "Network Error"

    return pingstatus

You need to capture/'receive' the return value of the function(pingstatus) in a variable with something like:

pingstatus = check_ping()

NOTE: ping -c is for Linux, for Windows use ping -n

Some info on python functions:

http://www.tutorialspoint.com/python/python_functions.htm

http://www.learnpython.org/en/Functions

It's probably worth going through a good introductory tutorial to Python, which will cover all the fundamentals. I recommend investigating Udacity.com and codeacademy.com

Also, the way strings are implemented (different for each platform) and when you start stitching them together. Like using a StringBuilder. It allocats a buffer for you to copy into, once you reach the end, it allocates even more memory for you, in the hopes that if you do a large concatenation performance won't be hindered.

Maybe Jon Skeet can help up out here?

That's how GROUP BY works. It takes several rows and turns them into one row. Because of this, it has to know what to do with all the combined rows where there have different values for some columns (fields). This is why you have two options for every field you want to SELECT : Either include it in the GROUP BY clause, or use it in an aggregate function so the system knows how you want to combine the field.

For example, let's say you have this table:

Name | OrderNumber
------------------
John | 1
John | 2

If you say GROUP BY Name, how will it know which OrderNumber to show in the result? So you either include OrderNumber in group by, which will result in these two rows. Or, you use an aggregate function to show how to handle the OrderNumbers. For example, MAX(OrderNumber), which means the result is John | 2 or SUM(OrderNumber) which means the result is John | 3.

I usually use pyexiv2 to set exif information in JPG files, but when I import the library in a script QGIS script crash.

I found a solution using the library exif:

https://pypi.org/project/exif/

It's so easy to use, and with Qgis I don,'t have any problem.

In this code I insert GPS coordinates to a snapshot of screen:

from exif import Image
with open(file_name, 'rb') as image_file:
    my_image = Image(image_file)

my_image.make = "Python"
my_image.gps_latitude_ref=exif_lat_ref
my_image.gps_latitude=exif_lat
my_image.gps_longitude_ref= exif_lon_ref
my_image.gps_longitude= exif_lon

with open(file_name, 'wb') as new_image_file:
    new_image_file.write(my_image.get_file())

I just wanted to share an improved version of Minhas Kamal's code because although it worked well enough for most applications, I had a few issues with it still. Two highly important things to remember:

1. The code (at the time of writing) calls free() on two static arrays. This will cause your program to crash. So I commented out those lines.
2. NEVER assume that your pixel data's pitch is always (Width*BytesPerPixel). It's best to let the user specify the pitch value. Example: when manipulating resources in Direct3D, the RowPitch is never guaranteed to be an even multiple of the byte depth being used. This can cause errors in your generated bitmaps (especially at odd resolutions such as 1366x768).

Below, you can see my revisions to his code:

const int bytesPerPixel = 4; /// red, green, blue
const int fileHeaderSize = 14;
const int infoHeaderSize = 40;

void generateBitmapImage(unsigned char *image, int height, int width, int pitch, const char* imageFileName);
unsigned char* createBitmapFileHeader(int height, int width, int pitch, int paddingSize);
unsigned char* createBitmapInfoHeader(int height, int width);



void generateBitmapImage(unsigned char *image, int height, int width, int pitch, const char* imageFileName) {

    unsigned char padding[3] = { 0, 0, 0 };
    int paddingSize = (4 - (/*width*bytesPerPixel*/ pitch) % 4) % 4;

    unsigned char* fileHeader = createBitmapFileHeader(height, width, pitch, paddingSize);
    unsigned char* infoHeader = createBitmapInfoHeader(height, width);

    FILE* imageFile = fopen(imageFileName, "wb");

    fwrite(fileHeader, 1, fileHeaderSize, imageFile);
    fwrite(infoHeader, 1, infoHeaderSize, imageFile);

    int i;
    for (i = 0; i < height; i++) {
        fwrite(image + (i*pitch /*width*bytesPerPixel*/), bytesPerPixel, width, imageFile);
        fwrite(padding, 1, paddingSize, imageFile);
    }

    fclose(imageFile);
    //free(fileHeader);
    //free(infoHeader);
}

unsigned char* createBitmapFileHeader(int height, int width, int pitch, int paddingSize) {
    int fileSize = fileHeaderSize + infoHeaderSize + (/*bytesPerPixel*width*/pitch + paddingSize) * height;

    static unsigned char fileHeader[] = {
        0,0, /// signature
        0,0,0,0, /// image file size in bytes
        0,0,0,0, /// reserved
        0,0,0,0, /// start of pixel array
    };

    fileHeader[0] = (unsigned char)('B');
    fileHeader[1] = (unsigned char)('M');
    fileHeader[2] = (unsigned char)(fileSize);
    fileHeader[3] = (unsigned char)(fileSize >> 8);
    fileHeader[4] = (unsigned char)(fileSize >> 16);
    fileHeader[5] = (unsigned char)(fileSize >> 24);
    fileHeader[10] = (unsigned char)(fileHeaderSize + infoHeaderSize);

    return fileHeader;
}

unsigned char* createBitmapInfoHeader(int height, int width) {
    static unsigned char infoHeader[] = {
        0,0,0,0, /// header size
        0,0,0,0, /// image width
        0,0,0,0, /// image height
        0,0, /// number of color planes
        0,0, /// bits per pixel
        0,0,0,0, /// compression
        0,0,0,0, /// image size
        0,0,0,0, /// horizontal resolution
        0,0,0,0, /// vertical resolution
        0,0,0,0, /// colors in color table
        0,0,0,0, /// important color count
    };

    infoHeader[0] = (unsigned char)(infoHeaderSize);
    infoHeader[4] = (unsigned char)(width);
    infoHeader[5] = (unsigned char)(width >> 8);
    infoHeader[6] = (unsigned char)(width >> 16);
    infoHeader[7] = (unsigned char)(width >> 24);
    infoHeader[8] = (unsigned char)(height);
    infoHeader[9] = (unsigned char)(height >> 8);
    infoHeader[10] = (unsigned char)(height >> 16);
    infoHeader[11] = (unsigned char)(height >> 24);
    infoHeader[12] = (unsigned char)(1);
    infoHeader[14] = (unsigned char)(bytesPerPixel * 8);

    return infoHeader;
}

It's possible to use mousedown event of document instead of blur:

$(document).mousedown(function(){
  if ($(event.target).attr("id") == "mySpan") {
    // some process
  }
});

The least painful and indeed Django-recommended way of doing this is through a OneToOneField(User) property.

Extending the existing User model

…

If you wish to store information related to User, you can use a one-to-one relationship to a model containing the fields for additional information. This one-to-one model is often called a profile model, as it might store non-auth related information about a site user.

That said, extending django.contrib.auth.models.User and supplanting it also works...

Substituting a custom User model

Some kinds of projects may have authentication requirements for which Django’s built-in User model is not always appropriate. For instance, on some sites it makes more sense to use an email address as your identification token instead of a username.

[Ed: Two warnings and a notification follow, mentioning that this is pretty drastic.]

I would definitely stay away from changing the actual User class in your Django source tree and/or copying and altering the auth module.

Do .libPaths(), close every R runing, check in the first directory, remove the zoo package restart R and install zoo again. Of course you need to have sufficient rights.

Static methods are the methods in Java that can be called without creating an object of class. It is belong to the class.

We use static method when we no need to be invoked method using instance.

JSON methods are quite inferior to the Gecko engine .toSource() primitive.

See the SO article response for comparison tests.

Also, the answer above refers to http://forums.devshed.com/javascript-development-115/tosource-with-arrays-in-ie-386109.html which, like JSON, (which the other article http://www.davidpirek.com/blog/object-to-string-how-to-deserialize-json uses via "ExtJs JSON encode source code") cannot handle circular references and is incomplete. The code below shows it's (spoof's) limitations (corrected to handle arrays and objects without content).

(direct link to code in //forums.devshed.com/ ... /tosource-with-arrays-in-ie-386109)

javascript:
Object.prototype.spoof=function(){
    if (this instanceof String){
      return '(new String("'+this.replace(/"/g, '\\"')+'"))';
    }
    var str=(this instanceof Array)
        ? '['
        : (this instanceof Object)
            ? '{'
            : '(';
    for (var i in this){
      if (this[i] != Object.prototype.spoof) {
        if (this instanceof Array == false) {
          str+=(i.match(/\W/))
              ? '"'+i.replace('"', '\\"')+'":'
              : i+':';
        }
        if (typeof this[i] == 'string'){
          str+='"'+this[i].replace('"', '\\"');
        }
        else if (this[i] instanceof Date){
          str+='new Date("'+this[i].toGMTString()+'")';
        }
        else if (this[i] instanceof Array || this[i] instanceof Object){
          str+=this[i].spoof();
        }
        else {
          str+=this[i];
        }
        str+=', ';
      }
    };
    str=/* fix */(str.length>2?str.substring(0, str.length-2):str)/* -ed */+(
        (this instanceof Array)
        ? ']'
        : (this instanceof Object)
            ? '}'
            : ')'
    );
    return str;
  };
for(i in objRA=[
    [   'Simple Raw Object source code:',
        '[new Array, new Object, new Boolean, new Number, ' +
            'new String, new RegExp, new Function, new Date]'   ] ,

    [   'Literal Instances source code:',
        '[ [], {}, true, 1, "", /./, function(){}, new Date() ]'    ] ,

    [   'some predefined entities:',
        '[JSON, Math, null, Infinity, NaN, ' +
            'void(0), Function, Array, Object, undefined]'      ]
    ])
alert([
    '\n\n\ntesting:',objRA[i][0],objRA[i][1],
    '\n.toSource()',(obj=eval(objRA[i][1])).toSource(),
    '\ntoSource() spoof:',obj.spoof()
].join('\n'));

which displays:

testing:
Simple Raw Object source code:
[new Array, new Object, new Boolean, new Number, new String,
          new RegExp, new Function, new Date]

.toSource()
[[], {}, (new Boolean(false)), (new Number(0)), (new String("")),
          /(?:)/, (function anonymous() {}), (new Date(1303248037722))]

toSource() spoof:
[[], {}, {}, {}, (new String("")),
          {}, {}, new Date("Tue, 19 Apr 2011 21:20:37 GMT")]

and

testing:
Literal Instances source code:
[ [], {}, true, 1, "", /./, function(){}, new Date() ]

.toSource()
[[], {}, true, 1, "", /./, (function () {}), (new Date(1303248055778))]

toSource() spoof:
[[], {}, true, 1, ", {}, {}, new Date("Tue, 19 Apr 2011 21:20:55 GMT")]

and

testing:
some predefined entities:
[JSON, Math, null, Infinity, NaN, void(0), Function, Array, Object, undefined]

.toSource()
[JSON, Math, null, Infinity, NaN, (void 0),
       function Function() {[native code]}, function Array() {[native code]},
              function Object() {[native code]}, (void 0)]

toSource() spoof:
[{}, {}, null, Infinity, NaN, undefined, {}, {}, {}, undefined]

My guess is that with VWD your solutions are more likely to be deployed to third party servers, many of which do not allow for a dynamically attached SQL Server database file. Thus the allowing of the other connection type.

This difference in IDE behavior is one of the key reasons for upgrading to a full version.

As of January 2020 and Xcode 11.3.1 -

• Open Xcode
• Open Xcode Preferences (Xcode->Preferences or Cmd-,)
• Click on Accounts
• At the left, click on your developer ID
• At the bottom right, click on Manage Certificates...
• In the lower left corner, click the arrow to the right of the + (plus)
• Select Apple Distribution from the menu

Xcode will automatically create an Apple Distribution certificate, install it in Keychain Access, and update Xcode's signing information

(Note: the single Apple Distribution certificate is now provided instead of the previous iOS Distribution certificate and equivalents.)

I know this is an old thread, but I like my own plugin that can cycle through whitespace modes (none, selection, and all) via a single shortcut. It also provides menu items under a View | Whitespace menu.

Hopefully people will find this useful - it is used by a lot of people :)

In addition to the top-answer, CSV files, for example, are reported as text/plain under macOS but as application/vnd.ms-excel under Windows. So I use this:

<input type="file" accept="text/plain, .csv, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, application/vnd.ms-excel" />

A quick add-on to mpenkov's answer above (didn't want this to get lost in the comments)

For me, I had to install pip for 3.6 first

sudo apt install python3-pip

now you can install python 3.7

sudo apt install python3.7

and then I could install pip for 3.7

python3.7 -m pip install pip

and as a bonus, to install other modules just preface with

python3.7 -m pip install <module>

EDIT 1 (12/2019):

I know this is obvious for most. but if you want python 3.8, just substitute python3.8 in place of python3.7

EDIT 2 (5/2020):

For those that are able to upgrade, Python 3.8 is available out-of-the-box for Ubuntu 20.04 which was released a few weeks ago.

For PostgreSQL:

GROUP BY to_char(timestampfield, 'yyyy-mm-dd')

or using cast:

GROUP BY timestampfield::date

if you want speed, use the second option and add an index:

CREATE INDEX tablename_timestampfield_date_idx ON  tablename(date(timestampfield));

Mmh ... there are many ways. I answer another network discovery question, and I write a little getting started.

Some tcpip stacks reply to icmp broadcasts. So you can try a PING to your network broadcast address.

For example, you have ip 192.168.1.1 and subnet 255.255.255.0

1. ping 192.168.1.255
2. stop the ping after 5 seconds
3. watch the devices replies : arp -a

Note : on step 3. you get the lists of the MAC-to-IP cached entries, so there are also the hosts in your subnet you exchange data to in the last minutes, even if they don't reply to icmp_get.

Note (2) : now I am on linux. I am not sure, but it can be windows doesn't reply to icm_get via broadcast.

Is it the only one device attached to your pc ? Is it a router or another simple pc ?

Just try this code this code work with me

var posOptions = {timeout: 10000, enableHighAccuracy: false};
$cordovaGeolocation.getCurrentPosition(posOptions).then(function (position) {
var lat = position.coords.latitude;
var long = position.coords.longitude;
 //console.log(lat +"          "+long);
$http.get('https://maps.googleapis.com/maps/api/geocode/json?latlng=' + lat + ',' + long + '&key=your key here').success(function (output) {
//console.log( JSON.stringify(output.results[0]));
//console.log( JSON.stringify(output.results[0].address_components[4].short_name));
var results = output.results;
if (results[0]) {
//console.log("results.length= "+results.length);
//console.log("hi "+JSON.stringify(results[0],null,4));
for (var j = 0; j < results.length; j++){
 //console.log("j= "+j);
//console.log(JSON.stringify(results[j],null,4));
for (var i = 0; i < results[j].address_components.length; i++){
 if(results[j].address_components[i].types[0] == "country") {
 //this is the object you are looking for
  country = results[j].address_components[i];
 }
 }
 }
 console.log(country.long_name);
 console.log(country.short_name);
 } else {
 alert("No results found");
 console.log("No results found");
 }
 });
 }, function (err) {
 });

Selection is its own object within VBA. It functions much like a Range object.

Selection and Range do not share all the same properties and methods, though, so for ease of use it might make sense just to create a range and set it equal to the Selection, then you can deal with it programmatically like any other range.

Dim myRange as Range
Set myRange = Selection

For further reading, check out the MSDN article.

I asked a question about this and I was referred to this post with the message:

This question already has an answer here:

“Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” using PHP

I am sharing my question and solution here:

This is the error:

Line 154 is the problem. This is what I have in line 154:

153    foreach($cities as $key => $city){
154        if(($city != 'London') && ($city != 'Madrid') && ($citiesCounterArray[$key] >= 1)){

I think the problem is that I am writing if conditions for the variable $city, which is not the key but the value in $key => $city. First, could you confirm if that is the cause of the warning? Second, if that is the problem, why is it that I cannot write a condition based on the value? Does it have to be with the key that I need to write the condition?

UPDATE 1: The problem is that when executing $citiesCounterArray[$key], sometimes the $key corresponds to a key that does not exist in the $citiesCounterArray array, but that is not always the case based on the data of my loop. What I need is to set a condition so that if $key exists in the array, then run the code, otherwise, skip it.

UPDATE 2: This is how I fixed it by using array_key_exists():

foreach($cities as $key => $city){
    if(array_key_exists($key, $citiesCounterArray)){
        if(($city != 'London') && ($city != 'Madrid') && ($citiesCounterArray[$key] >= 1)){

There are lots of operations in NumPy that could perhaps be put together to accomplish this. This will return indices of elements equal to item:

numpy.nonzero(array - item)

You could then take the first elements of the lists to get a single element.

Here is code for reading a matrix, note you also have a csvwrite function in matlab

void loadFromCSV( const std::string& filename )
{
    std::ifstream       file( filename.c_str() );
    std::vector< std::vector<std::string> >   matrix;
    std::vector<std::string>   row;
    std::string                line;
    std::string                cell;

    while( file )
    {
        std::getline(file,line);
        std::stringstream lineStream(line);
        row.clear();

        while( std::getline( lineStream, cell, ',' ) )
            row.push_back( cell );

        if( !row.empty() )
            matrix.push_back( row );
    }

    for( int i=0; i<int(matrix.size()); i++ )
    {
        for( int j=0; j<int(matrix[i].size()); j++ )
            std::cout << matrix[i][j] << " ";

        std::cout << std::endl;
    }
}

WHERE t.date >= DATE_ADD(CURDATE(), INTERVAL '-3' DAY);

use quotes on the -3 value

A more concise solution:

this._Http.get(`${API_URL}/api/v1/data/logs`, { 
    params: {
      logNamespace: logNamespace
    } 
 })

If you are using reactive forms and want to disable some input associated with a form control, you should place this disabled logic into you code and call yourFormControl.disable() or yourFormControl.enable()

What is the __main__.py file for?

When creating a Python module, it is common to make the module execute some functionality (usually contained in a main function) when run as the entry point of the program. This is typically done with the following common idiom placed at the bottom of most Python files:

if __name__ == '__main__':
    # execute only if run as the entry point into the program
    main()

You can get the same semantics for a Python package with __main__.py, which might have the following structure:

.
+-- demo
    +-- __init__.py
    +-- __main__.py

To see this, paste the below into a Python 3 shell:

from pathlib import Path

demo = Path.cwd() / 'demo'
demo.mkdir()

(demo / '__init__.py').write_text("""
print('demo/__init__.py executed')

def main():
    print('main() executed')
""")

(demo / '__main__.py').write_text("""
print('demo/__main__.py executed')

from demo import main

main()
""")

We can treat demo as a package and actually import it, which executes the top-level code in the __init__.py (but not the main function):

>>> import demo
demo/__init__.py executed

When we use the package as the entry point to the program, we perform the code in the __main__.py, which imports the __init__.py first:

$ python -m demo
demo/__init__.py executed
demo/__main__.py executed
main() executed

You can derive this from the documentation. The documentation says:

__main__ — Top-level script environment

'__main__' is the name of the scope in which top-level code executes. A module’s __name__ is set equal to '__main__' when read from standard input, a script, or from an interactive prompt.

A module can discover whether or not it is running in the main scope by checking its own __name__, which allows a common idiom for conditionally executing code in a module when it is run as a script or with python -m but not when it is imported:

if __name__ == '__main__':
     # execute only if run as a script
     main()

For a package, the same effect can be achieved by including a __main__.py module, the contents of which will be executed when the module is run with -m.

Zipped

You can also zip up this directory, including the __main__.py, into a single file and run it from the command line like this - but note that zipped packages can't execute sub-packages or submodules as the entry point:

from pathlib import Path

demo = Path.cwd() / 'demo2'
demo.mkdir()

(demo / '__init__.py').write_text("""
print('demo2/__init__.py executed')

def main():
    print('main() executed')
""")

(demo / '__main__.py').write_text("""
print('demo2/__main__.py executed')

from __init__ import main

main()
""")

Note the subtle change - we are importing main from __init__ instead of demo2 - this zipped directory is not being treated as a package, but as a directory of scripts. So it must be used without the -m flag.

Particularly relevant to the question - zipapp causes the zipped directory to execute the __main__.py by default - and it is executed first, before __init__.py:

$ python -m zipapp demo2 -o demo2zip
$ python demo2zip
demo2/__main__.py executed
demo2/__init__.py executed
main() executed

Note again, this zipped directory is not a package - you cannot import it either.

Or as alternative to laravel 3 profiler you can use:

https://github.com/paulboco/profiler or https://github.com/barryvdh/laravel-debugbar

It is normally provided by the browser and hard to change, so the only way around it will be a CSS/JavaScript hack,

See the following links for some approaches:

• http://www.shauninman.com/archive/2007/09/10/styling_file_inputs_with_css_and_the_dom
• http://www.quirksmode.org/dom/inputfile.html
• http://www.dreamincode.net/forums/showtopic15621.htm

HashSet

1. HashSet class implements the Set interface
2. In HashSet, we store objects(elements or values) e.g. If we have a HashSet of string elements then it could depict a set of HashSet elements: {“Hello”, “Hi”, “Bye”, “Run”}
3. HashSet does not allow duplicate elements that mean you can not store duplicate values in HashSet.
4. HashSet permits to have a single null value.

5. HashSet is not synchronized which means they are not suitable for thread-safe operations until unless synchronized explicitly.[similarity]

                         add      contains next     notes
   HashSet               O(1)     O(1)     O(h/n)   h is the table 
   

HashMap

1. HashMap class implements the Map interface
2. HashMap is used for storing key & value pairs. In short, it maintains the mapping of key & value (The HashMap class is roughly equivalent to Hashtable, except that it is unsynchronized and permits nulls.) This is how you could represent HashMap elements if it has integer key and value of String type: e.g. {1->”Hello”, 2->”Hi”, 3->”Bye”, 4->”Run”}
3. HashMap does not allow duplicate keys however it allows having duplicate values.
4. HashMap permits single null key and any number of null values.

5. HashMap is not synchronized which means they are not suitable for thread-safe operations until unless synchronized explicitly.[similarity]

                          get      containsKey next     Notes
    HashMap               O(1)     O(1)        O(h/n)   h is the table 
   

Please refer this article to find more information.

You could use the ArrayUtils API to remove it in a "nice looking way". It implements many operations (remove, find, add, contains,etc) on Arrays.
Take a look. It has made my life simpler.

Use Reflection:

Type type = obj.GetType();
PropertyInfo[] properties = type.GetProperties();

foreach (PropertyInfo property in properties)
{
    Console.WriteLine("Name: " + property.Name + ", Value: " + property.GetValue(obj, null));
}

for Excel - what tools/reference item must be added to gain access to BindingFlags, as there is no "System.Reflection" entry in the list

Edit: You can also specify a BindingFlags value to type.GetProperties():

BindingFlags flags = BindingFlags.Public | BindingFlags.Instance;
PropertyInfo[] properties = type.GetProperties(flags);

That will restrict the returned properties to public instance properties (excluding static properties, protected properties, etc).

You don't need to specify BindingFlags.GetProperty, you use that when calling type.InvokeMember() to get the value of a property.

I have changed the folder hierarchy

/shop/shop_name/base.html To /shop_name/shop/base.html

and then below would work.

{% extends shop_name|add:"/shop/base.html"%} 

Now its able to extend the base.html page.

I need to code such that if a certain list index exists, then run a function.

You already know how to test for this and in fact are already performing such tests in your code.

The valid indices for a list of length n are 0 through n-1 inclusive.

Thus, a list has an index i if and only if the length of the list is at least i + 1.

if(isnull({uspRptMonthlyGasRevenueByGas;1.YearTotal})) = true then
   "nd"
else
    totext({uspRptMonthlyGasRevenueByGas;1.YearTotal},'###.00')

The above logic should be what you are looking for.

As Shafik already wrote you need to use the right format because scanf gets you a char. Don't hesitate to look here if u aren't sure about the usage: http://www.cplusplus.com/reference/cstdio/printf/

Hint: It's faster/nicer to write x=x+1; the shorter way: x++;

Sorry for answering what's answered just wanted to give him the link - the site was really useful to me all the time dealing with C.

If you are trying to achieve horizontal div scrolling with touch on mobile, the updated CSS fix does not work (tested on Android Chrome and iOS Safari multiple versions), eg:

-webkit-overflow-scrolling: touch

I found a solution and modified it for horizontal scrolling from before the CSS trick. I've tested it on Android Chrome and iOS Safari and the listener touch events have been around a long time, so it has good support: http://caniuse.com/#feat=touch.

Usage:

touchHorizScroll('divIDtoScroll');

Functions:

function touchHorizScroll(id){
    if(isTouchDevice()){ //if touch events exist...
        var el=document.getElementById(id);
        var scrollStartPos=0;

        document.getElementById(id).addEventListener("touchstart", function(event) {
            scrollStartPos=this.scrollLeft+event.touches[0].pageX;              
        },false);

        document.getElementById(id).addEventListener("touchmove", function(event) {
            this.scrollLeft=scrollStartPos-event.touches[0].pageX;              
        },false);
    }
}
function isTouchDevice(){
    try{
        document.createEvent("TouchEvent");
        return true;
    }catch(e){
        return false;
    }
}  

Modified from vertical solution (pre CSS trick):

http://chris-barr.com/2010/05/scrolling_a_overflowauto_element_on_a_touch_screen_device/

Choose the folder to install (I called it BASE_PATH) and use the following commands to install SDK with flutter:

Install SDK

cd $BASE_DIR
mkdir android-sdk
cd android-sdk
wget https://dl.google.com/android/repository/commandlinetools-linux-6200805_latest.zip
unzip commandlinetools-linux-6200805_latest.zip
./tools/bin/sdkmanager --sdk_root=$(pwd) "build-tools;28.0.3" "emulator" "platform-tools" "platforms;android-28" "tools"

I used a separate folder for SDK, because it will add parent folders.

Install Flutter

cd $BASE_DIR
wget https://storage.googleapis.com/flutter_infra/releases/stable/linux/flutter_linux_v1.12.13+hotfix.8-stable.tar.xz
tar xvf flutter_linux_v1.12.13+hotfix.8-stable.tar.xz

Export Vars (you can add them to your .bashrc)

export ANDROID_SDK=$BASE_DIR/android-sdk
export ANDROID_PATH=$ANDROID_SDK/tools:$ANDROID_SDK/platform-tools
export FLUTTER=$BASE_DIR/bin
export PATH=$PATH:$ANDROID_PATH:$FLUTTER

Check!

flutter doctor

Doctor summary (to see all details, run flutter doctor -v):
[?] Flutter (Channel beta, v1.12.13, on Linux, locale en_US.UTF-8)
[?] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
[!] Android Studio (not installed)
[?] VS Code (version 1.31.1)
[!] Connected device
    ! No devices available

! Doctor found issues in 2 categories.

When you have multiple if conditions, numpy.select is the way to go:

In [4102]: import numpy as np
In [4098]: conditions = [df.A.eq(df.B), df.A.gt(df.B), df.A.lt(df.B)]
In [4096]: choices = [0, 1, -1]

In [4100]: df['C'] = np.select(conditions, choices)

In [4101]: df
Out[4101]: 
   A  B  C
a  2  2  0
b  3  1  1
c  1  3 -1

The simplest way using ClosedXml.

Imports ClosedXML.Excel

var dataList = new List<string>() { "a", "b", "c" };
var workbook = new XLWorkbook();     //creates the workbook
var wsDetailedData = workbook.AddWorksheet("data"); //creates the worksheet with sheetname 'data'
wsDetailedData.Cell(1, 1).InsertTable(dataList); //inserts the data to cell A1 including default column name
workbook.SaveAs(@"C:\data.xlsx"); //saves the workbook

For more info, you can also check wiki of ClosedXml. https://github.com/closedxml/closedxml/wiki

[ngStyle] with condition based if and else case.

<label for="file" [ngStyle]="isPreview ? {'cursor': 'default'} : {'cursor': 'pointer'}">Attachment

Instead of passing a variable around I do this which is self-contained at the top of any page you don't want direct access to, this should still be paired with .htaccess rules but I feel safer knowing there is a fail-safe if htaccess ever gets messes up.

<?php
// Security check: Deny direct file access; must be loaded through index
if (count(get_included_files()) == 1) {
    header("Location: index.php"); // Send to index
    die("403"); // Must include to stop PHP from continuing
}
?>

Unlike other answers, where you need to follow few steps to use two different github account from same machine, for me it worked in two steps.

You just need to :

1) generate SSH public and private key pair for each of your account under ~/.ssh location with different names and

2) add the generated public keys to the respective account under Settings >> SSH and GPG keys >> New SSH Key.

To generate the SSH public and private key pairs use following command:

cd ~/.ssh
ssh-keygen -t rsa -C "[email protected]" -f "id_rsa_WORK"
ssh-keygen -t rsa -C "[email protected]" -f "id_rsa_PERSONAL"

As a result of above commands, id_rsa_WORK and id_rsa_WORK.pub files will be created for your work account (ex - git.work.com) and id_rsa_PERSONAL and id_rsa_PERSONAL.pub will be created for your personal account (ex - github.com).

Once created, copy the content from each public (*.pub) file and do Step 2 for the each account.

PS : Its not necessary to make an host entry for each git account under ~/.ssh/config file as mentioned in other answers, if hostname of your two accounts are different.

If you are using bootstrap wrap your label and input with a div of a "checkbox" or "checkbox-inline" class.

<li>
    <div class="checkbox">
        <label><input type="checkbox" value="">Option 1</label>
    </div>
</li>

Reference: https://www.w3schools.com/bootstrap/bootstrap_forms_inputs.asp

Inheritance
Consider a car and a bus. They are two different vehicles. But still, they share some common properties like they have a steering, brakes, gears, engine etc.
So with the inheritance concept, this can be represented as following ...

public class Vehicle {
    private Driver driver;
    private Seat[] seatArray; //In java and most of the Object Oriented Programming(OOP) languages, square brackets are used to denote arrays(Collections).
    //You can define as many properties as you want here ...
}

Now a Bicycle ...

public class Bicycle extends Vehicle {
    //You define properties which are unique to bicycles here ...
    private Pedal pedal;
}

And a Car ...

public class Car extends Vehicle {
    private Engine engine;
    private Door[] doors;
}

That's all about Inheritance. We use them to classify objects into simpler Base forms and their children as we saw above.

Abstract Classes

Abstract classes are incomplete objects. To understand it further, let's consider the vehicle analogy once again.
A vehicle can be driven. Right? But different vehicles are driven in different ways ... For example, You cannot drive a car just as you drive a Bicycle.
So how to represent the drive function of a vehicle? It is harder to check what type of vehicle it is and drive it with its own function; you would have to change the Driver class again and again when adding a new type of vehicle.
Here comes the role of abstract classes and methods. You can define the drive method as abstract to tell that every inheriting children must implement this function.
So if you modify the vehicle class ...

//......Code of Vehicle Class
abstract public void drive();
//.....Code continues

The Bicycle and Car must also specify how to drive it. Otherwise, the code won't compile and an error is thrown.
In short.. an abstract class is a partially incomplete class with some incomplete functions, which the inheriting children must specify their own.

Interfaces Interfaces are totally incomplete. They do not have any properties. They just indicate that the inheriting children are capable of doing something ...
Suppose you have different types of mobile phones with you. Each of them has different ways to do different functions; Ex: call a person. The maker of the phone specifies how to do it. Here the mobile phones can dial a number - that is, it is dial-able. Let's represent this as an interface.

public interface Dialable {
    public void dial(Number n);
}

Here the maker of the Dialable defines how to dial a number. You just need to give it a number to dial.

// Makers define how exactly dialable work inside.

Dialable PHONE1 = new Dialable() {
    public void dial(Number n) {
        //Do the phone1's own way to dial a number
    }
}

Dialable PHONE2 = new Dialable() {
    public void dial(Number n) {
        //Do the phone2's own way to dial a number
    }
}


//Suppose there is a function written by someone else, which expects a Dialable
......
public static void main(String[] args) {
    Dialable myDialable = SomeLibrary.PHONE1;
    SomeOtherLibrary.doSomethingUsingADialable(myDialable);
}
.....

Hereby using interfaces instead of abstract classes, the writer of the function which uses a Dialable need not worry about its properties. Ex: Does it have a touch-screen or dial pad, Is it a fixed landline phone or mobile phone. You just need to know if it is dialable; does it inherit(or implement) the Dialable interface.

And more importantly, if someday you switch the Dialable with a different one

......
public static void main(String[] args) {
    Dialable myDialable = SomeLibrary.PHONE2; // <-- changed from PHONE1 to PHONE2
    SomeOtherLibrary.doSomethingUsingADialable(myDialable);
}
.....

You can be sure that the code still works perfectly because the function which uses the dialable does not (and cannot) depend on the details other than those specified in the Dialable interface. They both implement a Dialable interface and that's the only thing the function cares about.

Interfaces are commonly used by developers to ensure interoperability(use interchangeably) between objects, as far as they share a common function (just like you may change to a landline or mobile phone, as far as you just need to dial a number). In short, interfaces are a much simpler version of abstract classes, without any properties.
Also, note that you may implement(inherit) as many interfaces as you want but you may only extend(inherit) a single parent class.

More Info Abstract classes vs Interfaces

This will do it in Delphi. Note the use of the BitBlt function, which is a Windows API call, not something specific to Delphi.

Edit: Added example usage

function TForm1.GetScreenShot(OnlyActiveWindow: boolean) : TBitmap;
var
  w,h : integer;
  DC : HDC;
  hWin : Cardinal;
  r : TRect;
begin
  //take a screenshot and return it as a TBitmap.
  //if they specify "OnlyActiveWindow", then restrict the screenshot to the
  //currently focused window (same as alt-prtscrn)
  //Otherwise, get a normal screenshot (same as prtscrn)
  Result := TBitmap.Create;
  if OnlyActiveWindow then begin
    hWin := GetForegroundWindow;
    dc := GetWindowDC(hWin);
    GetWindowRect(hWin,r);
    w := r.Right - r.Left;
    h := r.Bottom - r.Top;
  end  //if active window only
  else begin
    hWin := GetDesktopWindow;
    dc := GetDC(hWin);
    w := GetDeviceCaps(DC,HORZRES);
    h := GetDeviceCaps(DC,VERTRES);
  end;  //else entire desktop

  try
    Result.Width := w;
    Result.Height := h;
    BitBlt(Result.Canvas.Handle,0,0,Result.Width,Result.Height,DC,0,0,SRCCOPY);
  finally
    ReleaseDC(hWin, DC) ;
  end;  //try-finally
end;

procedure TForm1.btnSaveScreenshotClick(Sender: TObject);
var
  bmp : TBitmap;
  savdlg : TSaveDialog;
begin
  //take a screenshot, prompt for where to save it
  savdlg := TSaveDialog.Create(Self);
  bmp := GetScreenshot(False);
  try
    if savdlg.Execute then begin
      bmp.SaveToFile(savdlg.FileName);
    end;
  finally
    FreeAndNil(bmp);
    FreeAndNil(savdlg);
  end;  //try-finally
end;

requests does not handle parsing XML responses, no. XML responses are much more complex in nature than JSON responses, how you'd serialize XML data into Python structures is not nearly as straightforward.

Python comes with built-in XML parsers. I recommend you use the ElementTree API:

import requests
from xml.etree import ElementTree

response = requests.get(url)

tree = ElementTree.fromstring(response.content)

or, if the response is particularly large, use an incremental approach:

    response = requests.get(url, stream=True)
    # if the server sent a Gzip or Deflate compressed response, decompress
    # as we read the raw stream:
    response.raw.decode_content = True

    events = ElementTree.iterparse(response.raw)
    for event, elem in events:
        # do something with `elem`

The external lxml project builds on the same API to give you more features and power still.

{
    "success": true,
    "data": {
        "BLR": {
            "origin": "JAI",
            "destination": "BLR",
            "price": 127,
            "transfers": 0,
            "airline": "LB",
            "flight_number": 655,
            "departure_at": "2017-06-03T18:20:00Z",
            "return_at": "2017-06-07T08:30:00Z",
            "expires_at": "2017-03-05T08:40:31Z"
        }
    }
};

In my case I was having the same error and later I come to know that the 'condition' is mysql reserved keyword and I used that as field name.

Works fine for me

See example here. http://jsfiddle.net/blowsie/c6VAy/

Make sure your jquery is inside $(document).ready function or similar.

Also you can improve your code by using jquery data

$('#amount').data('min','1000');

<div id="amount" data-min=""></div>

Update,

A working example of your full code (pretty much) here. http://jsfiddle.net/blowsie/c6VAy/3/

You can create the radio buttons dynamically, ListBox can help you do that, without converters, quite simple.

The concrete steps are below:

• create a ListBox and set the ItemsSource for the listbox as the enum MyLovelyEnum and binding the SelectedItem of the ListBox to the VeryLovelyEnum property.
• then the Radio Buttons for each ListBoxItem will be created.

• Step 1: add the enum to static resources for your Window, UserControl or Grid etc.

    <Window.Resources>
        <ObjectDataProvider MethodName="GetValues"
                            ObjectType="{x:Type system:Enum}"
                            x:Key="MyLovelyEnum">
            <ObjectDataProvider.MethodParameters>
                <x:Type TypeName="local:MyLovelyEnum" />
            </ObjectDataProvider.MethodParameters>
        </ObjectDataProvider>
    </Window.Resources>

• Step 2: Use the List Box and Control Template to populate each item inside as Radio button

    <ListBox ItemsSource="{Binding Source={StaticResource MyLovelyEnum}}" SelectedItem="{Binding VeryLovelyEnum, Mode=TwoWay}" >
        <ListBox.Resources>
            <Style TargetType="{x:Type ListBoxItem}">
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate>
                            <RadioButton
                                Content="{TemplateBinding ContentPresenter.Content}"
                                IsChecked="{Binding Path=IsSelected,
                                RelativeSource={RelativeSource TemplatedParent},
                                Mode=TwoWay}" />
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
        </ListBox.Resources>
    </ListBox>

The advantage is: if someday your enum class changes, you do not need to update the GUI (XAML file).

References: https://brianlagunas.com/a-better-way-to-data-bind-enums-in-wpf/

It will already work, as David pointed out!

>>> def machineEpsilon(func=float):
...     machine_epsilon = func(1)
...     while func(1)+func(machine_epsilon) != func(1):
...         machine_epsilon_last = machine_epsilon
...         machine_epsilon = func(machine_epsilon) / func(2)
...     return machine_epsilon_last
... 
>>> machineEpsilon(float)
2.220446049250313e-16
>>> import numpy
>>> machineEpsilon(numpy.float64)
2.2204460492503131e-16
>>> machineEpsilon(numpy.float32)
1.1920929e-07

In a ASP.NET Core project you can use the QueryHelpers class, available in the Microsoft.AspNetCore.WebUtilities namespace for ASP.NET Core, or the .NET Standard 2.0 NuGet package for other consumers:

// using Microsoft.AspNetCore.WebUtilities;
var query = new Dictionary<string, string>
{
    ["foo"] = "bar",
    ["foo2"] = "bar2",
    // ...
};

var response = await client.GetAsync(QueryHelpers.AddQueryString("/api/", query));

<Button x:Name="myBtn_DetailsTab_Save" FlowDirection="LeftToRight"  HorizontalAlignment="Left" Margin="835,544,0,0" VerticalAlignment="Top"  Width="143" Height="53" BorderBrush="#FF0F6287" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" FontFamily="B Titr" FontSize="15" FontWeight="Bold" BorderThickness="2" Click="myBtn_DetailsTab_Save_Click">
    <StackPanel HorizontalAlignment="Stretch" Background="#FF1FB3F5" Cursor="Hand" >
        <Image HorizontalAlignment="Left"  Source="image/bg/Save.png" Height="36" Width="124" />
        <TextBlock HorizontalAlignment="Center" Width="84" Height="22" VerticalAlignment="Top" Margin="0,-31,-58,0" Text="??? ?????" />
    </StackPanel>
</Button>

Use shorthand property for the background property and type the folder name where thje image had been located.

.btn-pTool{
    margin:0;
    padding:0;
    background:url("../folder name/slide_button.png") no-repeat; 
            }

.btn-pToolName{
    text-align: center; 
    width: 26px; 
    height: 190px; 
    display: block; 
    color: #fff; 
    text-decoration: none;  
    font-family: Arial, Helvetica, sans-serif;  
    font-weight: bold; 
    font-size: 1em; 
    line-height: 32px; 
}

Simple and easy way

df.dropna(subset=['EPS'],inplace=True)

source: https://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.dropna.html

Or:

SELECT SUM(foo), DATE(mydate) mydate FROM a_table GROUP BY mydate;

More efficient (I think.) Because you don't have to cast mydate twice per row.

git reset --hard @{u}* deletes all your local changes on the current branch, including commits. I'm surprised no one has posted this yet considering you won't have to look up what commit to revert to or play with branches.

_{* That is, reset to the current branch at @{upstream}—commonly origin/<branchname>, but not always}

There is no interactive solution in Excel because some functions are not vector-friendly, like CELL, above quoted. For example, it's possible counting all the numbers whose absolute value is less than 3, because ABS is accepted inside a formula array.

So I've used the following array formula (Ctrl+Shift+Enter after edit with no curly brackets)

             ={SUM(IF(ABS(F1:F15)<3,1,0))}

If Column F has

                   F
          1 ...    2
          2 ....   4
          3 ....  -2
          4 ....   1
          5 .....  5

It counts 3! (-2,2 and 1). In order to show how ABS is array-friendly function let's do a simple test: Select G1:G5, digit =ABS(F1:F5) in the formula bar and press Ctrl+Shift+Enter. It's like someone write Abs(F1:F5)(1), Abs(F1:F5)(2), etc.

                   F    G
          1 ...    2  =ABS(F1:F5) => 2 
          2 ....   4  =ABS(F1:F5) => 4
          3 ....  -2  =ABS(F1:F5) => 2
          4 ....   1  =ABS(F1:F5) => 1
          5 .....  5  =ABS(F1:F5) => 5

Now I put some mixed data, including 2 date values.

                   F
          1 ...    Fab-25-2012
          2 ....   4
          3 ....   May-5-2013
          4 ....   Ball
          5 .....  5

In this case, CELL fails and return 1

             ={SUM(IF(CELL("format",F1:F15)="D4",1,0))}

It happens because CELL return the format of first cell of the range. (D4 is a m-d-y format)

So the only thing left is programming! A UDF(User defined Function) for formula array must return a variant array:

Function TypeCell(R As Range) As Variant
Dim V() As Variant
Dim Cel As Range
Dim I As Integer
Application.Volatile '// For revaluation in interactive environment
ReDim V(R.Cells.Count - 1) As Variant
I = 0
For Each Cel In R
   V(I) = VarType(Cel) '// Output array has the same size of input range.
   I = I + 1
Next Cel
TypeCell = V
End Function

Now is easy (the constant VbDate is 7):

             =SUM(IF(TypeCell(F1:F5)=7,1,0))  

It shows 2. That technique can be used for any shape of cells. I've tested vertical, horizontal and rectangular shapes, since you fill using for each order inside the function.

<font size="4"> <font color="#ffe680">something here</font><br>

I was trying all these methods but most didn't work properly for me, eventually I accidentally did this and it works great, it works on chrome and safari (the only things I tested on). Replace the colour code thing with your background colour code and the text will be invisible. you can also adjust the font size to make the line break bigger or smaller depending on your desire. It is really simple.

You can do this with css transforms, though be careful with container height/width. Also you may need to position it lower:

input[type="range"] {_x000D_
   position: absolute;_x000D_
   top: 40%;_x000D_
   transform: rotate(270deg);_x000D_
}

<input type="range"/>

or the 3d transform equivalent:

input[type="range"] {
   transform: rotateZ(270deg);
}

You can also use this to switch the direction of the slide by setting it to 180deg or 90deg for horizontal or vertical respectively.

@hop5 and @RnMss suggested to use C++11 lambdas, but if you deal with pointers, you can use them directly:

#include <thread>
#include <iostream>

class CFoo {
  public:
    int m_i = 0;
    void bar() {
      ++m_i;
    }
};

int main() {
  CFoo foo;
  std::thread t1(&CFoo::bar, &foo);
  t1.join();
  std::thread t2(&CFoo::bar, &foo);
  t2.join();
  std::cout << foo.m_i << std::endl;
  return 0;
}

outputs

2

Rewritten sample from this answer would be then:

#include <thread>
#include <iostream>

class Wrapper {
  public:
      void member1() {
          std::cout << "i am member1" << std::endl;
      }
      void member2(const char *arg1, unsigned arg2) {
          std::cout << "i am member2 and my first arg is (" << arg1 << ") and second arg is (" << arg2 << ")" << std::endl;
      }
      std::thread member1Thread() {
          return std::thread(&Wrapper::member1, this);
      }
      std::thread member2Thread(const char *arg1, unsigned arg2) {
          return std::thread(&Wrapper::member2, this, arg1, arg2);
      }
};

int main() {
  Wrapper *w = new Wrapper();
  std::thread tw1 = w->member1Thread();
  tw1.join();
  std::thread tw2 = w->member2Thread("hello", 100);
  tw2.join();
  return 0;
}

I also had problem in Ubuntu 15.10 while installing gulp-preetify.

The problem was:

1. Registry returned 404 for GET on http://registry.npmjs.org/gulp-preetify

2. I tried by using npm install gulp-preetify but it didn't worked.

3. Again i tried using: npm i gulp-preetify and it just got installed.

I cannot guarantee that it will solve your problem but it won't harm with a single try.

1. literal_eval, a somewhat safer version of eval (will only evaluate literals ie strings, lists etc):

   from ast import literal_eval
   
   python_dict = literal_eval("{'a': 1}")
   

2. json.loads but it would require your string to use double quotes:

   import json
   
   python_dict = json.loads('{"a": 1}')
   

The fundamental difference in most programming languages is that unless the unexpected happens a for loop will always repeat n times or until a break statement, (which may be conditional), is met then finish with a while loop it may repeat 0 times, 1, more or even forever, depending on a given condition which must be true at the start of each loop for it to execute and always false on exiting the loop, (for completeness a do ... while loop, (or repeat until), for languages that have it, always executes at least once and does not guarantee the condition on the first execution).

It is worth noting that in Python a for or while statement can have break, continue and else statements where:

• break - terminates the loop
• continue - moves on to the next time around the loop without executing following code this time around
• else - is executed if the loop completed without any break statements being executed.

N.B. In the now unsupported Python 2 range produced a list of integers but you could use xrange to use an iterator. In Python 3 range returns an iterator.

So the answer to your question is 'it all depends on what you are trying to do'!

You need to use the proper git URL:

pip install git+https://github.com/jkbr/httpie.git#egg=httpie

Also see the VCS Support section of the pip documentation.

Don’t forget to include the egg=<projectname> part to explicitly name the project; this way pip can track metadata for it without having to have run the setup.py script.

I wanted to add my pure CSS answer to this problem of modals with dynamic width and height. The following code also works with the following requirements:

1. Place modal in center of screen
2. If modal is higher than viewport, scroll dimmer (not modal content)

HTML:

<div class="modal">
    <div class="modal__content">
        (Long) Content
    </div>
</div>

CSS/LESS:

.modal {
    position: fixed;
    display: flex;
    align-items: center;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    padding: @qquad;
    overflow-y: auto;
    background: rgba(0, 0, 0, 0.7);
    z-index: @zindex-modal;

    &__content {
        width: 900px;
        margin: auto;
        max-width: 90%;
        padding: @quad;
        background: white;
        box-shadow: 0 0 5px 0 rgba(0, 0, 0, 0.75);
    }
}

This way the modal is always within the viewport. The width and height of the modal are as flexible as you like. I removed my close icon from this for simplicity.

Use the tee command:

echo "hello" | tee logfile.txt

You can print Unicode objects as well, you don't need to do str() around it.

Assuming you really want a str:

When you do str(u'\u2013') you are trying to convert the Unicode string to a 8-bit string. To do this you need to use an encoding, a mapping between Unicode data to 8-bit data. What str() does is that is uses the system default encoding, which under Python 2 is ASCII. ASCII contains only the 127 first code points of Unicode, that is \u0000 to \u007F1. The result is that you get the above error, the ASCII codec just doesn't know what \u2013 is (it's a long dash, btw).

You therefore need to specify which encoding you want to use. Common ones are ISO-8859-1, most commonly known as Latin-1, which contains the 256 first code points; UTF-8, which can encode all code-points by using variable length encoding, CP1252 that is common on Windows, and various Chinese and Japanese encodings.

You use them like this:

u'\u2013'.encode('utf8')

The result is a str containing a sequence of bytes that is the uTF8 representation of the character in question:

'\xe2\x80\x93'

And you can print it:

>>> print '\xe2\x80\x93'
–

Select t1.SongName
From tablename t1
left join tablename t2
 on t1.SongName = t2.SongName
    and t1.PersonName <> t2.PersonName
    and t1.Status = 'Complete' -- my assumption that this is necessary
    and t2.Status = 'Complete' -- my assumption that this is necessary
    and t1.PersonName IN ('Holly', 'Ryan')
    and t2.PersonName IN ('Holly', 'Ryan')

You literally just pass them in std::thread(func1,a,b,c,d); that should have compiled if the objects existed, but it is wrong for another reason. Since there is no object created you cannot join or detach the thread and the program will not work correctly. Since it is a temporary the destructor is immediately called, since the thread is not joined or detached yet std::terminate is called. You could std::join or std::detach it before the temp is destroyed, like std::thread(func1,a,b,c,d).join();//or detach .

This is how it should be done.

std::thread t(func1,a,b,c,d);
t.join();  

You could also detach the thread, read-up on threads if you don't know the difference between joining and detaching.

Currently, it is not possible to prevent a user from writing decimal values in your input with HTML only. You have to use javascript.

I believe the action name is "workbench.action.quickOpen".

@JoinColumn could be used on both sides of the relationship. The question was about using @JoinColumn on the @OneToMany side (rare case). And the point here is in physical information duplication (column name) along with not optimized SQL query that will produce some additional UPDATE statements.

According to documentation:

Since many to one are (almost) always the owner side of a bidirectional relationship in the JPA spec, the one to many association is annotated by @OneToMany(mappedBy=...)

@Entity
public class Troop {
    @OneToMany(mappedBy="troop")
    public Set<Soldier> getSoldiers() {
    ...
}

@Entity
public class Soldier {
    @ManyToOne
    @JoinColumn(name="troop_fk")
    public Troop getTroop() {
    ...
} 

Troop has a bidirectional one to many relationship with Soldier through the troop property. You don't have to (must not) define any physical mapping in the mappedBy side.

To map a bidirectional one to many, with the one-to-many side as the owning side, you have to remove the mappedBy element and set the many to one @JoinColumn as insertable and updatable to false. This solution is not optimized and will produce some additional UPDATE statements.

@Entity
public class Troop {
    @OneToMany
    @JoinColumn(name="troop_fk") //we need to duplicate the physical information
    public Set<Soldier> getSoldiers() {
    ...
}

@Entity
public class Soldier {
    @ManyToOne
    @JoinColumn(name="troop_fk", insertable=false, updatable=false)
    public Troop getTroop() {
    ...
}

Using toJSON() date function as below:

var sqlDatetime = new Date(new Date().getTime() - new Date().getTimezoneOffset() * 60 * 1000).toJSON().slice(0, 19).replace('T', ' ');
console.log(sqlDatetime);

Try running the following commands. It always works for me.

# docker volume rm $(docker volume ls -qf dangling=true)
# docker rm $(docker ps -q -f 'status=exited')

After execution of the above commands, restart docker by,

# service docker restart

UPDATE

Official approach:

public void composeEmail(String[] addresses, String subject) {
    Intent intent = new Intent(Intent.ACTION_SENDTO);
    intent.setData(Uri.parse("mailto:")); // only email apps should handle this
    intent.putExtra(Intent.EXTRA_EMAIL, addresses);
    intent.putExtra(Intent.EXTRA_SUBJECT, subject);
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivity(intent);
    }
}

Ref link

OLD ANSWER

The accepted answer doesn't work on the 4.1.2. This should work on all platforms:

Intent emailIntent = new Intent(Intent.ACTION_SENDTO, Uri.fromParts(
            "mailto","[email protected]", null));
emailIntent.putExtra(Intent.EXTRA_SUBJECT, "Subject");
emailIntent.putExtra(Intent.EXTRA_TEXT, "Body");
startActivity(Intent.createChooser(emailIntent, "Send email..."));

Update: According to marcwjj, it seems that on 4.3, we need to pass string array instead of a string for email address to make it work. We might need to add one more line:

intent.putExtra(Intent.EXTRA_EMAIL, addresses); // String[] addresses

The DataSet object has a Tables array. If you know the table you want, it will have a Row array, each object of which has an ItemArray array. In your case the code would most likely be

int var1 = int.Parse(ds.Tables[0].Rows[0].ItemArray[4].ToString());

and so forth. This would give you the 4th item in the first row. You can also use Columns instead of ItemArray and specify the column name as a string instead of remembering it's index. That approach can be easier to keep up with if the table structure changes. So that would be

int var1 = int.Parse(ds.Tables[0].Rows[0]["MyColumnName"].ToString());

Solutions that use SUBSTRING and concatenation + are nearly independent of RDBMS. Here is a short solution that is specific to SQL Server:

declare @x int = 123456789
select stuff(stuff(@x, 4, 0, '-'), 8, 0, '-')

It specifies the size of the log file to trigger rotation. For example size 50M will trigger a log rotation once the file is 50MB or greater in size. You can use the suffix M for megabytes, k for kilobytes, and G for gigabytes. If no suffix is used, it will take it to mean bytes. You can check the example at the end. There are three directives available size, maxsize, and minsize. According to manpage:

minsize size
              Log  files  are  rotated when they grow bigger than size bytes,
              but not before the additionally specified time interval (daily,
              weekly,  monthly, or yearly).  The related size option is simi-
              lar except that it is mutually exclusive with the time interval
              options,  and  it causes log files to be rotated without regard
              for the last rotation time.  When minsize  is  used,  both  the
              size and timestamp of a log file are considered.

size size
              Log files are rotated only if they grow bigger then size bytes.
              If size is followed by k, the size is assumed to  be  in  kilo-
              bytes.  If the M is used, the size is in megabytes, and if G is
              used, the size is in gigabytes. So size 100,  size  100k,  size
              100M and size 100G are all valid.
maxsize size
              Log files are rotated when they grow bigger than size bytes even before
              the additionally specified time interval (daily, weekly, monthly, 
              or yearly).  The related size option is  similar  except  that  it 
              is mutually exclusive with the time interval options, and it causes
              log files to be rotated without regard for the last rotation time.  
              When maxsize is used, both the size and timestamp of a log file are                  
              considered.

Here is an example:

"/var/log/httpd/access.log" /var/log/httpd/error.log {
           rotate 5
           mail [email protected]
           size 100k
           sharedscripts
           postrotate
               /usr/bin/killall -HUP httpd
           endscript
       }

Here is an explanation for both files /var/log/httpd/access.log and /var/log/httpd/error.log. They are rotated whenever it grows over 100k in size, and the old logs files are mailed (uncompressed) to [email protected] after going through 5 rotations, rather than being removed. The sharedscripts means that the postrotate script will only be run once (after the old logs have been compressed), not once for each log which is rotated. Note that the double quotes around the first filename at the beginning of this section allows logrotate to rotate logs with spaces in the name. Normal shell quoting rules apply, with ,, and \ characters supported.

I ran into a similar problem on a Linux server, where two versions of Boost have been installed. One is the precompiled 1.53.0 version which counts as old in 2018; it's in /usr/include and /usr/lib64. The version I want to use is 1.67.0, as a minimum version of 1.65.1 is required for another C++ library I'm installing; it's in /opt/boost, which has include and lib subdirectories. As suggested in previous answers, I set variables in CMakeLists.txt to specify where to look for Boost 1.67.0 as follows

include_directories(/opt/boost/include/)
include_directories(/opt/boost/lib/)
set(BOOST_ROOT /opt/boost/)
set(BOOST_INCLUDEDIR /opt/boost/include/)
set(BOOST_LIBRARYDIR /opt/boost/lib)
set(Boost_NO_SYSTEM_PATHS TRUE)
set(Boost_NO_BOOST_CMAKE TRUE)

But CMake doesn't honor those changes. Then I found an article online: CMake can use a local Boost, and realized that I need to change the variables in CMakeCache.txt. There I found that the Boost-related variables are still pointing to the default Boost 1.53.0, so no wonder CMake doesn't honor my changes in CMakeLists.txt. Then I set the Boost-related variables in CMakeCache.txt

Boost_DIR:PATH=Boost_DIR-NOTFOUND
Boost_INCLUDE_DIR:PATH=/opt/boost/include/
Boost_LIBRARY_DIR_DEBUG:PATH=/opt/boost/lib
Boost_LIBRARY_DIR_RELEASE:PATH=/opt/boost/lib

I also changed the variables pointing to the non-header, compiled parts of the Boost library to point to the version I want. Then CMake successfully built the library that depends on a recent version of Boost.

For me, I had to have OpenCV (3.4.2), Py-OpenCV (3.4.2), LibOpenCV (3.4.2).

My Python was version 3.5.6 with Anaconda in Windows OS 10.

I use Windows Server 2012 for hosting for a long time and it just stop working after a more than years without any problem. My solution was to add public IP address of the server to list of relays and enabled Windows Integrated Authentication.

I just made two changes and I don't which help.

Go to IIS 6 Manager

Select properties of SMTP server

On tab Access, select Relays

Add your public IP address

Close the dialog and on the same tab click to Authentication button.

Add Integrated Windows Authentication

Maybe some step is not needed, but it works.

Just to generate the java classes from wsdl to me the best tool is "cxf wsdl2java". Its pretty simple and easy to use. I have found some complexities with some data type in axis2. But unfortunately you can't use those client stub code in your android application because android environment doesn't allow the "java/javax" package name in compiling time unless you rename the package name.

And in the android.jar all the javax.* sources for web service consuming are not available. To resolve these I have developed this WS Client Generation Tool for android.

In background it uses "cxf wsdl2java" to generate the java client stub for android platform for you, And I have written some sources to consume the web service in a smarter way.

Just give the wsdl file location it will give you the sources and some library. you have to just put the sources and the libraries in your project. and you can just call it in some "method call fashion" just we do in our enterprise project, you don't need to know the namespace/soap action etc. For example, you have a service to login, what you need to do is :

LoginService service = new LoginService ( );
Login login = service.getLoginPort ( );
LoginServiceResponse resp = login.login ( "someUser", "somePass" );

And its fully open and free.

This message displays when Internet Explorer reaches the maximum number of synchronous instructions for a piece of JavaScript. The default maximum is 5,000,000 instructions, you can increase this number on a single machine by editing the registry.

Internet Explorer now tracks the total number of executed script statements and resets the value each time that a new script execution is started, such as from a timeout or from an event handler, for the current page with the script engine. Internet Explorer displays a "long-running script" dialog box when that value is over a threshold amount.

The only way to solve the problem for all users that might be viewing your page is to break up the number of iterations your loop performs using timers, or refactor your code so that it doesn't need to process as many instructions.

Breaking up a loop with timers is relatively straightforward:

var i=0;
(function () {
    for (; i < 6000000; i++) {
        /*
            Normal processing here
        */

        // Every 100,000 iterations, take a break
        if ( i > 0 && i % 100000 == 0) {
            // Manually increment `i` because we break
            i++;
            // Set a timer for the next iteration 
            window.setTimeout(arguments.callee);
            break;
        }
    }
})();

I second Blindy's suggestion to use the MAC address of the (first?) network adapter. Yes, the MAC address can be spoofed, but this has side effects (you don't want two PCs with the same MAC address in the same network), and it's something that "your average pirate" won't do just to be able to use your software. Considering that there's no 100% solution against software piracy, the MAC address is a good compromise, IMO.

Note, however, that the address will change when the user adds, replaces or removes a network card (or replaces his old PC altogether), so be prepared to help your customers and give them a new key when they change their hardware configuration.

For this your android application must have uploaded into the android market. when you upload it on the android market then use the following code to open the market with your android application.

    Intent intent = new Intent(Intent.ACTION_VIEW,Uri.parse("market://details?id=<packagename>"));
startActivity(intent);

If you want it to download and install from your own server then use the following code

Intent intent = new Intent(Intent.ACTION_VIEW,Uri.parse("http://www.example.com/sample/test.apk"));
    startActivity(intent);

<!DOCTYPE html>
<html>
<body>

<form action="#" method="post" enctype="multipart/form-data">
    Select image to upload:
    <input name="my_files[]" type="file" multiple="multiple" />
    <input type="submit" value="Upload Image" name="submit">
</form>


<?php

 if (isset($_FILES['my_files']))
  {
    $myFile = $_FILES['my_files'];
    $fileCount = count($myFile["name"]);


        for ($i = 0; $i <$fileCount; $i++)
         {
           $error = $myFile["error"][$i]; 

            if ($error == '4')  // error 4 is for "no file selected"
             {
               echo "no file selected";
             }
            else
             {

               $name =  $myFile["name"][$i];
               echo $name; 
               echo "<br>"; 
               $temporary_file = $myFile["tmp_name"][$i];
               echo $temporary_file;
               echo "<br>";
               $type = $myFile["type"][$i];
               echo $type;
               echo "<br>";
               $size = $myFile["size"][$i];
               echo $size;
               echo "<br>";



               $target_path = "uploads/$name";   //first make a folder named "uploads" where you will upload files


                 if(move_uploaded_file($temporary_file,$target_path))
                  {
                   echo " uploaded";
                   echo "<br>";
                   echo "<br>";
                  }
                   else
                  {
                   echo "no upload ";
                  }




              }
        }  
}
        ?>


</body>
</html>

But be alert. User can upload any type of file and also can hack your server or system by uploading a malicious or php file. In this script there should be some validations. Thank you.

Your question is a bit confusing, but I am assuming - you are first doing 'ssh' to find out which files or rather specifically directories are there and then again on your local computer, you are trying to scp 'all' files in that directory to local path. you should simply do scp -r.

So here in your case it'd be something like

local> scp -r [email protected]:/path/to/dir local/path 

If youare using some other executable that provides 'scp like functionality', refer to it's manual for recursively copying files.