#Modelstate | Programs & Examples on Modelstate

ModelState.IsValid == false, why?

If you remove the check for the ModelsState.IsValid and let it error, if you copy this line ((System.Data.Entity.Validation.DbEntityValidationException)$exception).EntityValidationErrors and paste it in the watch section in Visual Studio it will give you exactly what the error is. Saves a lot of time checking where the error is.

How to get all Errors from ASP.Net MVC modelState?

As I discovered having followed the advice in the answers given so far, you can get exceptions occuring without error messages being set, so to catch all problems you really need to get both the ErrorMessage and the Exception.

String messages = String.Join(Environment.NewLine, ModelState.Values.SelectMany(v => v.Errors)
                                                           .Select( v => v.ErrorMessage + " " + v.Exception));

or as an extension method

public static IEnumerable<String> GetErrors(this ModelStateDictionary modelState)
{
      return modelState.Values.SelectMany(v => v.Errors)
                              .Select( v => v.ErrorMessage + " " + v.Exception).ToList();

}

Asp.net MVC ModelState.Clear

Well the ModelState basically holds the current State of the model in terms of validation, it holds

ModelErrorCollection: Represent the errors when the model try to bind the values. ex.

TryUpdateModel();
UpdateModel();

or like a parameter in the ActionResult

public ActionResult Create(Person person)

ValueProviderResult: Hold the details about the attempted bind to the model. ex. AttemptedValue, Culture, RawValue.

Clear() method must be use with caution because it can lead to unspected results. And you will lose some nice properties of the ModelState like AttemptedValue, this is used by MVC in the background to repopulate the form values in case of error.

ModelState["a"].Value.AttemptedValue

ModelState.AddModelError - How can I add an error that isn't for a property?

Putting the model dot property in strings worked for me: ModelState.AddModelError("Item1.Month", "This is not a valid date");

The type is defined in an assembly that is not referenced, how to find the cause?

one of main reason can be the property of DLL you must before do any thing to check the specific version property if it true make it false

Reason: maybe the source code joined with other (old)version when you build it , but this Library upgraded with new update the version now different in the Assembly Cash and your application forbidden to get new DLL ,and after disable specific version property your applacaten will be free to get the new version of DLL references

Removing underline with href attribute

Add a style with the attribute text-decoration:none;:

There are a number of different ways of doing this.

Inline style:

<a href="xxx.html" style="text-decoration:none;">goto this link</a>

Inline stylesheet:

<html>
<head>
<style type="text/css">
   a {
      text-decoration:none;
   }
</style>
</head>
<body>
<a href="xxx.html">goto this link</a>
</body>
</html>

External stylesheet:

<html>
<head>
<link rel="Stylesheet" href="stylesheet.css" />
</head>
<body>
<a href="xxx.html">goto this link</a>
</body>
</html>

stylesheet.css:

a {
      text-decoration:none;
   }

How to change the value of attribute in appSettings section with Web.config transformation

You want something like:

<appSettings>
  <add key="developmentModeUserId" xdt:Transform="Remove" xdt:Locator="Match(key)"/>
  <add key="developmentMode" value="false" xdt:Transform="SetAttributes"
          xdt:Locator="Match(key)"/>
</appSettings>

Why this "Implicit declaration of function 'X'"?

summation and your other functions are defined after they're used in main, and so the compiler has made a guess about it's signature; in other words, an implicit declaration has been assumed.

You should declare the function before it's used and get rid of the warning. In the C99 specification, this is an error.

Either move the function bodies before main, or include method signatures before main, e.g.:

#include <stdio.h>

int summation(int *, int *, int *);

int main()
{
    // ...

How do I add an existing directory tree to a project in Visual Studio?

As far as I can tell, the only way to do this in VS2010 is akin to the drag and drop method. Right click the solution to which you want to add a project. The application menu will have an add ... item. Opening that, you find that one of the options is to add an existing project to the solution.

In the dialog box that opens, navigate to the folder containing the project file for the solution and select it. VS will, as part of importing that project file, also import the entire directory and, I assume any subordinate directories which are part of that project.

As this does require an existing project file, it won't be impossible to import a directory tree until that tree has been converted to a project.

SQL multiple columns in IN clause

Determine whether the list of names is different with each query or reused. If it is reused, it belongs to the database.

Even if it is unique with each query, it may be useful to load it to a temporary table (#table syntax) for performance reasons - in that case you will be able to avoid recompilation of a complex query.

If the maximum number of names is fixed, you should use a parametrized query.

However, if none of the above cases applies, I would go with inlining the names in the query as in your approach #1.

Create a file if one doesn't exist - C

You typically have to do this in a single syscall, or else you will get a race condition.

This will open for reading and writing, creating the file if necessary.

FILE *fp = fopen("scores.dat", "ab+");

If you want to read it and then write a new version from scratch, then do it as two steps.

FILE *fp = fopen("scores.dat", "rb");
if (fp) {
    read_scores(fp);
}

// Later...

// truncates the file
FILE *fp = fopen("scores.dat", "wb");
if (!fp)
    error();
write_scores(fp);

Matplotlib subplots_adjust hspace so titles and xlabels don't overlap?

I find this quite tricky, but there is some information on it here at the MatPlotLib FAQ. It is rather cumbersome, and requires finding out about what space individual elements (ticklabels) take up...

Update: The page states that the tight_layout() function is the easiest way to go, which attempts to automatically correct spacing.

Otherwise, it shows ways to acquire the sizes of various elements (eg. labels) so you can then correct the spacings/positions of your axes elements. Here is an example from the above FAQ page, which determines the width of a very wide y-axis label, and adjusts the axis width accordingly:

import matplotlib.pyplot as plt
import matplotlib.transforms as mtransforms
fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot(range(10))
ax.set_yticks((2,5,7))
labels = ax.set_yticklabels(('really, really, really', 'long', 'labels'))

def on_draw(event):
   bboxes = []
   for label in labels:
       bbox = label.get_window_extent()
       # the figure transform goes from relative coords->pixels and we
       # want the inverse of that
       bboxi = bbox.inverse_transformed(fig.transFigure)
       bboxes.append(bboxi)

   # this is the bbox that bounds all the bboxes, again in relative
   # figure coords
   bbox = mtransforms.Bbox.union(bboxes)
   if fig.subplotpars.left < bbox.width:
       # we need to move it over
       fig.subplots_adjust(left=1.1*bbox.width) # pad a little
       fig.canvas.draw()
   return False

fig.canvas.mpl_connect('draw_event', on_draw)

plt.show()

How to handle notification when app in background in Firebase

Since the display-messages which are sent from Firebase Notification UI only works if your app is in foreground. For data-messages, there is a need to make a POST call to FCM

Steps

Install Advanced Rest Client Google Chrome Extension
Add the following headers

Key: Content-Type, Value: application/json

Key: Authorization, Value: key="your server key"

Add the body

If using topics :

{
    "to" : "/topics/topic_name",
    "data": {
    "key1" : "value1",
    "key2" : "value2",
    }
}

If using registration id :

{
    "registration_ids" : "[{"id"},{id1}]",
    "data": {
    "key1" : "value1",
    "key2" : "value2",
     }
}

Thats it!. Now listen to onMessageReceived callback as usual.

@Override
public void onMessageReceived(RemoteMessage remoteMessage) { 
     Map<String, String> data = remoteMessage.getData();
     String value1 = data.get("key1");
     String value2 = data.get("key2");
}

How to check if a file exists from a url

I've just found this solution:

if(@getimagesize($remoteImageURL)){
    //image exists!
}else{
    //image does not exist.
}

Source: http://www.dreamincode.net/forums/topic/11197-checking-if-file-exists-on-remote-server/

How do you query for "is not null" in Mongo?

An alternative that has not been mentioned, but that may be a more efficient option for some (won't work with NULL entries) is to use a sparse index (entries in the index only exist when there is something in the field). Here is a sample data set:

db.foo.find()
{ "_id" : ObjectId("544540b31b5cf91c4893eb94"), "imageUrl" : "http://example.com/foo.jpg" }
{ "_id" : ObjectId("544540ba1b5cf91c4893eb95"), "imageUrl" : "http://example.com/bar.jpg" }
{ "_id" : ObjectId("544540c51b5cf91c4893eb96"), "imageUrl" : "http://example.com/foo.png" }
{ "_id" : ObjectId("544540c91b5cf91c4893eb97"), "imageUrl" : "http://example.com/bar.png" }
{ "_id" : ObjectId("544540ed1b5cf91c4893eb98"), "otherField" : 1 }
{ "_id" : ObjectId("544540f11b5cf91c4893eb99"), "otherField" : 2 }

Now, create the sparse index on imageUrl field:

db.foo.ensureIndex( { "imageUrl": 1 }, { sparse: true } )
{
    "createdCollectionAutomatically" : false,
    "numIndexesBefore" : 1,
    "numIndexesAfter" : 2,
    "ok" : 1
}

Now, there is always a chance (and in particular with a small data set like my sample) that rather than using an index, MongoDB will use a table scan, even for a potential covered index query. As it turns out that gives me an easy way to illustrate the difference here:

db.foo.find({}, {_id : 0, imageUrl : 1})
{ "imageUrl" : "http://example.com/foo.jpg" }
{ "imageUrl" : "http://example.com/bar.jpg" }
{ "imageUrl" : "http://example.com/foo.png" }
{ "imageUrl" : "http://example.com/bar.png" }
{  }
{  }

OK, so the extra documents with no imageUrl are being returned, just empty, not what we wanted. Just to confirm why, do an explain:

db.foo.find({}, {_id : 0, imageUrl : 1}).explain()
{
    "cursor" : "BasicCursor",
    "isMultiKey" : false,
    "n" : 6,
    "nscannedObjects" : 6,
    "nscanned" : 6,
    "nscannedObjectsAllPlans" : 6,
    "nscannedAllPlans" : 6,
    "scanAndOrder" : false,
    "indexOnly" : false,
    "nYields" : 0,
    "nChunkSkips" : 0,
    "millis" : 0,
    "server" : "localhost:31100",
    "filterSet" : false
}

So, yes, a BasicCursor equals a table scan, it did not use the index. Let's force the query to use our sparse index with a hint():

db.foo.find({}, {_id : 0, imageUrl : 1}).hint({imageUrl : 1})
{ "imageUrl" : "http://example.com/bar.jpg" }
{ "imageUrl" : "http://example.com/bar.png" }
{ "imageUrl" : "http://example.com/foo.jpg" }
{ "imageUrl" : "http://example.com/foo.png" }

And there is the result we were looking for - only documents with the field populated are returned. This also only uses the index (i.e. it is a covered index query), so only the index needs to be in memory to return the results.

This is a specialized use case and can't be used generally (see other answers for those options). In particular it should be noted that as things stand you cannot use count() in this way (for my example it will return 6 not 4), so please only use when appropriate.

MySQL - UPDATE query based on SELECT Query

You can use:

UPDATE Station AS st1, StationOld AS st2
   SET st1.already_used = 1
 WHERE st1.code = st2.code

PHP Fatal error: Cannot redeclare class

This will happen if we use any of the in built classes in the php library. I used the class name as Directory and I got the same error. If you get error first make sure that the class name you use is not one of the in built classes.

How can I send the "&" (ampersand) character via AJAX?

You can use encodeURIComponent().

It will escape all the characters that cannot occur verbatim in URLs:

var wysiwyg_clean = encodeURIComponent(wysiwyg);

In this example, the ampersand character & will be replaced by the escape sequence %26, which is valid in URLs.

Two constructors

To call one constructor from another you need to use this() and you need to put it first. In your case the default constructor needs to call the one which takes an argument, not the other ways around.

How to initialize java.util.date to empty

Instance of java.util.Date stores a date. So how can you store nothing in it or have it empty? It can only store references to instances of java.util.Date. If you make it null means that it is not referring any instance of java.util.Date.

You have tried date2=""; what you mean to do by this statement you want to reference the instance of String to a variable that is suppose to store java.util.Date. This is not possible as Java is Strongly Typed Language.

Edit

After seeing the comment posted to the answer of LastFreeNickname

I am having a form that the date textbox should be by default blank in the textbox, however while submitting the data if the user didn't enter anything, it should accept it

I would suggest you could check if the textbox is empty. And if it is empty, then you could store default date in your variable or current date or may be assign it null as shown below:

if(textBox.getText() == null || textBox.getText().equals(""){
    date2 = null; // For Null;
    // date2 = new Date(); For Current Date
    // date2 = new Date(0); For Default Date
}

Also I can assume since you are asking user to enter a date in a TextBox, you are using a DateFormat to parse the text that is entered in the TextBox. If this is the case you could simply call the dateFormat.parse() which throws a ParseException if the format in which the date was written is incorrect or is empty string. Here in the catch block you could put the above statements as show below:

try{
    date2 = dateFormat.parse(textBox.getText());
}catch(ParseException e){
    date2 = null; // For Null;
    // date2 = new Date(); For Current Date
    // date2 = new Date(0); For Default Date
}

What is the IntelliJ shortcut key to create a javadoc comment?

Typing /** + then pressing Enter above a method signature will create Javadoc stubs for you.

How can I get double quotes into a string literal?

Thankfully, with C++11 there is also the more pleasing approach of using raw string literals.

printf("She said \"time flies like an arrow, but fruit flies like a banana\".");

Becomes:

printf(R"(She said "time flies like an arrow, but fruit flies like a banana".)");

With respect to the addition of brackets after the opening quote, and before the closing quote, note that they can be almost any combination of up to 16 characters, helping avoid the situation where the combination is present in the string itself. Specifically:

any member of the basic source character set except: space, the left parenthesis (, the right parenthesis ), the backslash , and the control characters representing horizontal tab, vertical tab, form feed, and newline" (N3936 §2.14.5 [lex.string] grammar) and "at most 16 characters" (§2.14.5/2)

How much clearer it makes this short strings might be debatable, but when used on longer formatted strings like HTML or JSON, it's unquestionably far clearer.

Android - Set text to TextView

In xml use this:

<TextView 
       android:id="@+id/textView"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"/>

In Activity define the view:

Textview textView=(TextView)findViewById(R.id.textView);
textView.setText(getResources().getString(R.string.txt_hello));

In string file:

<string name="txt_hello">Hello</string>

Output: Hello

How to delete columns in pyspark dataframe

Consider 2 dataFrames:

>>> aDF.show()
+---+----+
| id|datA|
+---+----+
|  1|  a1|
|  2|  a2|
|  3|  a3|
+---+----+

and

>>> bDF.show()
+---+----+
| id|datB|
+---+----+
|  2|  b2|
|  3|  b3|
|  4|  b4|
+---+----+

To accomplish what you are looking for, there are 2 ways:

1. Different joining condition. Instead of saying aDF.id == bDF.id

aDF.join(bDF, aDF.id == bDF.id, "outer")

Write this:

aDF.join(bDF, "id", "outer").show()
+---+----+----+
| id|datA|datB|
+---+----+----+
|  1|  a1|null|
|  3|  a3|  b3|
|  2|  a2|  b2|
|  4|null|  b4|
+---+----+----+

This will automatically get rid of the extra the dropping process.

2. Use Aliasing: You will lose data related to B Specific Id's in this.

>>> from pyspark.sql.functions import col
>>> aDF.alias("a").join(bDF.alias("b"), aDF.id == bDF.id, "outer").drop(col("b.id")).show()

+----+----+----+
|  id|datA|datB|
+----+----+----+
|   1|  a1|null|
|   3|  a3|  b3|
|   2|  a2|  b2|
|null|null|  b4|
+----+----+----+

Delete all rows in table

Truncate table in MS Sql Server

Truncate table in Mysql

How do I delete unpushed git commits?

Delete the most recent commit, keeping the work you've done:

git reset --soft HEAD~1

Delete the most recent commit, destroying the work you've done:

git reset --hard HEAD~1

How to add an auto-incrementing primary key to an existing table, in PostgreSQL?

I landed here because I was looking for something like that too. In my case, I was copying the data from a set of staging tables with many columns into one table while also assigning row ids to the target table. Here is a variant of the above approaches that I used. I added the serial column at the end of my target table. That way I don't have to have a placeholder for it in the Insert statement. Then a simple select * into the target table auto populated this column. Here are the two SQL statements that I used on PostgreSQL 9.6.4.

ALTER TABLE target ADD COLUMN some_column SERIAL;
INSERT INTO target SELECT * from source;

How to delete specific columns with VBA?

To answer the question How to delete specific columns in vba for excel. I use Array as below.

sub del_col()

dim myarray as variant
dim i as integer

myarray = Array(10, 9, 8)'Descending to Ascending
For i = LBound(myarray) To UBound(myarray)
    ActiveSheet.Columns(myarray(i)).EntireColumn.Delete
Next i

end sub

Passing an array of parameters to a stored procedure

You could use a temp table which the stored procedure expects to exist. This will work on older versions of SQL Server, which do not support XML etc.

CREATE TABLE #temp
(INT myid)
GO
CREATE PROC myproc
AS
BEGIN
    DELETE YourTable
    FROM YourTable                    
    LEFT OUTER JOIN #temp T ON T.myid=s.id
    WHERE s.id IS NULL
END

Getting only 1 decimal place

>>> "{:.1f}".format(45.34531)
'45.3'

Or use the builtin round:

>>> round(45.34531, 1)
45.299999999999997

How to validate an Email in PHP?

I always use this:

function validEmail($email){
    // First, we check that there's one @ symbol, and that the lengths are right
    if (!preg_match("/^[^@]{1,64}@[^@]{1,255}$/", $email)) {
        // Email invalid because wrong number of characters in one section, or wrong number of @ symbols.
        return false;
    }
    // Split it into sections to make life easier
    $email_array = explode("@", $email);
    $local_array = explode(".", $email_array[0]);
    for ($i = 0; $i < sizeof($local_array); $i++) {
        if (!preg_match("/^(([A-Za-z0-9!#$%&'*+\/=?^_`{|}~-][A-Za-z0-9!#$%&'*+\/=?^_`{|}~\.-]{0,63})|(\"[^(\\|\")]{0,62}\"))$/", $local_array[$i])) {
            return false;
        }
    }
    if (!preg_match("/^\[?[0-9\.]+\]?$/", $email_array[1])) { // Check if domain is IP. If not, it should be valid domain name
        $domain_array = explode(".", $email_array[1]);
        if (sizeof($domain_array) < 2) {
            return false; // Not enough parts to domain
        }
        for ($i = 0; $i < sizeof($domain_array); $i++) {
            if (!preg_match("/^(([A-Za-z0-9][A-Za-z0-9-]{0,61}[A-Za-z0-9])|([A-Za-z0-9]+))$/", $domain_array[$i])) {
                return false;
            }
        }
    }

    return true;
}

Class JavaLaunchHelper is implemented in both. One of the two will be used. Which one is undefined

Install Java 7u21 from here: http://www.oracle.com/technetwork/java/javase/downloads/java-archive-downloads-javase7-521261.html#jdk-7u21-oth-JPR

set these variables:

export JAVA_HOME="/Library/Java/JavaVirtualMachines/jdk1.7.0_21.jdk/Contents/Home"
export PATH=$JAVA_HOME/bin:$PATH

Run your app and fun :)

(Minor update: put variable value in quote)

Why does visual studio 2012 not find my tests?

We were using xunit and solution worked for me and the team was deleting the folder %TEMP%\VisualStudioTestExplorerExtensions

Read this thread.

Why is the Visual Studio 2015/2017 Test Runner not discovering my xUnit v2 tests

Origin is not allowed by Access-Control-Allow-Origin

In Ruby Sinatra

response['Access-Control-Allow-Origin'] = '*'

for everyone or

response['Access-Control-Allow-Origin'] = 'http://yourdomain.name'

Avoid Adding duplicate elements to a List C#

Your this check:

if (!lines2.Contains(lines3.ToString()))

is invalid. You are checking if your lines2 contains System.String[] since lines3.ToString() will give you that. You need to check if item from lines3 exists in lines2 or not.

You can iterate each item in lines3 check if it exists in the lines2 and then add it. Something like.

foreach (string str in lines3)
{
    if (!lines2.Contains(str))
        lines2.Add(str);
}

Or if your lines2 is any empty list, then you can simply add the lines3 distinct values to the list like:

lines2.AddRange(lines3.Distinct());

then your lines2 will contain distinct values.

Update UI from Thread in Android

You should do this with the help of AsyncTask (an intelligent backround thread) and ProgressDialog

AsyncTask enables proper and easy use of the UI thread. This class allows to perform background operations and publish results on the UI thread without having to manipulate threads and/or handlers.

An asynchronous task is defined by a computation that runs on a background thread and whose result is published on the UI thread. An asynchronous task is defined by 3 generic types, called Params, Progress and Result, and 4 steps, called begin, doInBackground, processProgress and end.

The 4 steps

When an asynchronous task is executed, the task goes through 4 steps:

onPreExecute(), invoked on the UI thread immediately after the task is executed. This step is normally used to setup the task, for instance by showing a progress bar in the user interface.

doInBackground(Params...), invoked on the background thread immediately after onPreExecute() finishes executing. This step is used to perform background computation that can take a long time. The parameters of the asynchronous task are passed to this step. The result of the computation must be returned by this step and will be passed back to the last step. This step can also use publishProgress(Progress...) to publish one or more units of progress. These values are published on the UI thread, in the onProgressUpdate(Progress...) step.

onProgressUpdate(Progress...), invoked on the UI thread after a call to publishProgress(Progress...). The timing of the execution is undefined. This method is used to display any form of progress in the user interface while the background computation is still executing. For instance, it can be used to animate a progress bar or show logs in a text field.

onPostExecute(Result), invoked on the UI thread after the background computation finishes. The result of the background computation is passed to this step as a parameter. Threading rules

There are a few threading rules that must be followed for this class to work properly:

The task instance must be created on the UI thread. execute(Params...) must be invoked on the UI thread. Do not call onPreExecute(), onPostExecute(Result), doInBackground(Params...), onProgressUpdate(Progress...) manually. The task can be executed only once (an exception will be thrown if a second execution is attempted.)

Example code
What the adapter does in this example is not important, more important to understand that you need to use AsyncTask to display a dialog for the progress.

private class PrepareAdapter1 extends AsyncTask<Void,Void,ContactsListCursorAdapter > {
    ProgressDialog dialog;
    @Override
    protected void onPreExecute() {
        dialog = new ProgressDialog(viewContacts.this);
        dialog.setMessage(getString(R.string.please_wait_while_loading));
        dialog.setIndeterminate(true);
        dialog.setCancelable(false);
        dialog.show();
    }
    /* (non-Javadoc)
     * @see android.os.AsyncTask#doInBackground(Params[])
     */
    @Override
    protected ContactsListCursorAdapter doInBackground(Void... params) {
        cur1 = objItem.getContacts();
        startManagingCursor(cur1);

        adapter1 = new ContactsListCursorAdapter (viewContacts.this,
                R.layout.contact_for_listitem, cur1, new String[] {}, new int[] {});

        return adapter1;
    }

    protected void onPostExecute(ContactsListCursorAdapter result) {
        list.setAdapter(result);
        dialog.dismiss();
    }
}

Open mvc view in new window from controller

This cannot be done from within the controller itself, but rather from your View. As I see it, you have two options:

Decorate your link with the "_blank" attribute (examples using HTML helper and straight HMTL syntax)
- @Html.ActionLink("linkText", "Action", new {controller="Controller"}, new {target="_blank"})
- <a href="@Url.Action("Action", "Controller")" target="_blank">Link Text</a>
Use Javascript to open a new window

window.open("Link URL")

How can I add a username and password to Jenkins?

If installed as an admin, use:-

uname - admin
pw - the passkey that was generated during installation

document.getElementById("remember").visibility = "hidden"; not working on a checkbox

you can use

style="display:none"

Ex:

<asp:TextBox ID="txbProv" runat="server" style="display:none"></asp:TextBox>

cvc-elt.1: Cannot find the declaration of element 'MyElement'

I got this same error working in Eclipse with Maven with the additional information

schema_reference.4: Failed to read schema document 'https://maven.apache.org/xsd/maven-4.0.0.xsd', because 1) could not find the document; 2) the document could not be read; 3) the root element of the document is not <xsd:schema>.

This was after copying in a new controller and it's interface from a Thymeleaf example. Honestly, no matter how careful I am I still am at a loss to understand how one is expected to figure this out. On a (lucky) guess I right clicked the project, clicked Maven and Update Project which cleared up the issue.

IntelliJ: Error:java: error: release version 5 not supported

In my case it was enough to add this part to the pom.xml file:

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.0</version>
                <configuration>
                    <release>11</release>
                </configuration>
            </plugin>
        </plugins>
    </build>

Oracle date "Between" Query

You need to convert those to actual dates instead of strings, try this:

SELECT *
FROM <TABLENAME>
WHERE start_date BETWEEN TO_DATE('2010-01-15','YYYY-MM-DD') AND TO_DATE('2010-01-17', 'YYYY-MM-DD');

Edited to deal with format as specified:

SELECT *
FROM <TABLENAME>
WHERE start_date BETWEEN TO_DATE('15-JAN-10','DD-MON-YY') AND TO_DATE('17-JAN-10','DD-MON-YY');

How to access route, post, get etc. parameters in Zend Framework 2

All the above methods will work fine if your content-type is "application/-www-form-urlencoded". But if your content-type is "application/json" then you will have to do the following:

$params = json_decode(file_get_contents('php://input'), true); print_r($params);

Reason : See #7 in https://www.toptal.com/php/10-most-common-mistakes-php-programmers-make

Is there a way to check for both `null` and `undefined`?

I think this answer needs an update, check the edit history for the old answer.

Basically, you have three deferent cases null, undefined, and undeclared, see the snippet below.

// bad-file.ts
console.log(message)

You'll get an error says that variable message is undefined (aka undeclared), of course, the Typescript compiler shouldn't let you do that but REALLY nothing can prevent you.

// evil-file.ts
// @ts-gnore
console.log(message)

The compiler will be happy to just compile the code above. So, if you're sure that all variables are declared you can simply do that

if ( message != null ) {
    // do something with the message
}

the code above will check for null and undefined, BUT in case the message variable may be undeclared (for safety), you may consider the following code

if ( typeof(message) !== 'undefined' && message !== null ) {
    // message variable is more than safe to be used.
}

Note: the order here typeof(message) !== 'undefined' && message !== null is very important you have to check for the undefined state first atherwise it will be just the same as message != null, thanks @Jaider.

Remove all files except some from a directory

find . | grep -v "excluded files criteria" | xargs rm

This will list all files in current directory, then list all those that don't match your criteria (beware of it matching directory names) and then remove them.

Update: based on your edit, if you really want to delete everything from current directory except files you listed, this can be used:

mkdir /tmp_backup && mv textfile.txt backup.tar.gz script.php database.sql info.txt /tmp_backup/ && rm -r && mv /tmp_backup/* . && rmdir /tmp_backup

It will create a backup directory /tmp_backup (you've got root privileges, right?), move files you listed to that directory, delete recursively everything in current directory (you know that you're in the right directory, do you?), move back to current directory everything from /tmp_backup and finally, delete /tmp_backup.

I choose the backup directory to be in root, because if you're trying to delete everything recursively from root, your system will have big problems.

Surely there are more elegant ways to do this, but this one is pretty straightforward.

Get a list of URLs from a site

I would look into any number of online sitemap generation tools. Personally, I've used this one (java based)in the past, but if you do a google search for "sitemap builder" I'm sure you'll find lots of different options.

phpmailer - The following SMTP Error: Data not accepted

in my case I was using AWS SES and I had to verify both "FromEmail" and "Recipient". Once done that I could send without problems.

Can I nest a <button> element inside an <a> using HTML5?

why not..you can also embeded picture on button as well

<FORM method = "POST" action = "https://stackoverflow.com"> 
    <button type="submit" name="Submit">
        <img src="img/Att_hack.png" alt="Text">
    </button>
</FORM>

Android SharedPreferences in Fragment

Maybe this is helpfull to someone after few years. New way, on Androidx, of getting SharedPreferences() inside fragment is to implement into gradle dependencies

implementation "androidx.preference:preference:1.1.1"

and then, inside fragment call

SharedPreferences preferences;
preferences = androidx.preference.PreferenceManager.getDefaultSharedPreferences(getActivity());

Histogram using gnuplot?

I have a little modification to Born2Smile's solution.

I know that doesn't make much sense, but you may want it just in case. If your data is integer and you need a float bin size (maybe for comparison with another set of data, or plot density in finer grid), you will need to add a random number between 0 and 1 inside floor. Otherwise, there will be spikes due to round up error. floor(x/width+0.5) will not do because it will create pattern that's not true to original data.

binwidth=0.3
bin(x,width)=width*floor(x/width+rand(0))

Convert string to binary then back again using PHP

Strings in PHP are always BLOBs. So you can use a string to hold the value for your database BLOB. All of this stuff base-converting and so on has to do with presenting that BLOB.

If you want a nice human-readable representation of your BLOB then it makes sense to show the bytes it contains, and probably to use hex rather than decimal. Hence, the string "41 42 43" is a good way to present the byte array that in C# would be

var bytes = new byte[] { 0x41, 0x42, 0x43 };

but it is obviously not a good way to represent those bytes! The string "ABC" is an efficient representation, because it is in fact the same BLOB (only it's not so Large in this case).

In practice you will typically get your BLOBs from functions that return string - such as that hashing function, or other built-in functions like fread.

In the rare cases (but not so rare when just trying things out/prototyping) that you need to just construct a string from some hard-coded bytes I don't know of anything more efficient than converting a "hex string" to what is often called a "binary string" in PHP:

$myBytes = "414243";
$data = pack('H*', $myBytes);

If you var_dump($data); it'll show you string(3) "ABC". That's because 0x41 = 65 decimal = 'A' (in basically all encodings).

Since looking at binary data by interpreting it as a string is not exactly intuitive, you may want to make a basic wrapper to make debugging easier. One possible such wrapper is

class blob
{
    function __construct($hexStr = '')
    {
        $this->appendHex($hexStr);
    }

    public $value;

    public function appendHex($hexStr)
    {
        $this->value .= pack('H*', $hexStr);
    }

    public function getByte($index)
    {
        return unpack('C', $this->value{$index})[1];
    }

    public function setByte($index, $value)
    {
        $this->value{$index} = pack('C', $value);
    }

    public function toArray()
    {
        return unpack('C*', $this->value);
    }
}

This is something I cooked up on the fly, and probably just a starting point for your own wrapper. But the idea is to use a string for storage since this is the most efficient structure available in PHP, while providing methods like toArray() for use in debugger watches/evaluations when you want to examine the contents.

Of course you may use a perfectly straightforward PHP array instead and pack it to a string when interfacing with something that uses strings for binary data. Depending on the degree to which you are actually going to modify the blob this may prove easier, and although it isn't space efficient I think you'd get acceptable performance for many tasks.

An example to illustrate the functionality:

// Construct a blob with 3 bytes: 0x41 0x42 0x43.
$b = new blob("414243");

// Append 3 more bytes: 0x44 0x45 0x46.
$b->appendHex("444546");

// Change the second byte to 0x41 (so we now have 0x41 0x41 0x43 0x44 0x45 0x46).
$b->setByte(1, 0x41); // or, equivalently, setByte(1, 65)

// Dump the first byte.
var_dump($b->getByte(0));

// Verify the result. The string "AACDEF", because it's only ASCII characters, will have the same binary representation in basically any encoding.
$ok = $b->value == "AACDEF";

Lightweight workflow engine for Java

The question is what you really want to achieve when you asking for a workflow engine.

The general goal which you would like to achieve by using a workflow engine, is to become more flexible in changing your business logic during runtime. The modelling part is surely one of the most important here. BPMN 2.0 is a de-facto standard in this area and all of the discussed engines support this standard.

The second goal is to control the business process in the way of describing the 'what should happen when...' questions. And this part has a lot to do with the business requirements you are confronted within your project.

Some of the workflow engines (Activity, JBPM) can help you to answer this requirement by 'coding' your processes. This means that you model the 'what should happen when..' paradigm in a way, where you decide which part of your code (e.g a task or an event) should be executed by the workflow engine in various situations. A lot of discussion is going about this concept. And developers naturally ask whether this may not even be implemented by themselves. (It is in fact not so easy as it seems at the first glance)

Some other workflow engines (Imixs-Workflow, Bonita) can help you to answer the 'what should happen when...' requirement in a more user-centric way. This is the area of Human-centric business process management, which supports human skills and activities by a task orientated workflow-engine. The focus is more on the distribution of tasks and processes inside an organisation. The workflow engine helps you to distribute a task to a certain user or user group and to secure, log and monitor a long running business process. Maybe these are the things you do not really want to implement by yourself.

So my advice is, not to mix things that need to be considered separately, because workflow covers a very wide area.

"java.lang.OutOfMemoryError: PermGen space" in Maven build

We face this error when permanent generation heap is full and some of us we use command prompt to build our maven project in windows. since we need to increase heap size, we could set our environment variable @ControlPanel/System and Security/System and there you click on Change setting and select Advanced and set Environment variable as below

Variable-name : MAVEN_OPTS
Variable-value : -XX:MaxPermSize=128m

How to include NA in ifelse?

So, I hear this works:

Data$X1<-as.character(Data$X1)
Data$GEOID<-as.character(Data$BLKIDFP00)
Data<-within(Data,X1<-ifelse(is.na(Data$X1),GEOID,Data$X2))

But I admit I have only intermittent luck with it.

MySQL: ALTER TABLE if column not exists

Sometimes it may happen that there are multiple schema created in a database.

So to be specific schema we need to target, so this will help to do it.

SELECT count(*) into @colCnt FROM information_schema.columns WHERE table_name = 'mytable' AND column_name = 'mycolumn' and table_schema = DATABASE();
IF @colCnt = 0 THEN
    ALTER TABLE `mytable` ADD COLUMN `mycolumn` VARCHAR(20) DEFAULT NULL;
END IF;

IntelliJ: Working on multiple projects

You can use Armory plugin which makes switching between projects comfortable. The default shortcut for Project List is Alt + A.

By default currently opened projects are displayed at the top of this list (with bold style).

Why is NULL undeclared?

NULL is not a built-in constant in the C or C++ languages. In fact, in C++ it's more or less obsolete, just use a plain literal 0 instead, the compiler will do the right thing depending on the context.

In newer C++ (C++11 and higher), use nullptr (as pointed out in a comment, thanks).

Otherwise, add

#include <stddef.h>

to get the NULL definition.

Python return list from function

Wait for a void async method

do a AutoResetEvent, call the function then wait on AutoResetEvent and then set it inside async void when you know it is done.

You can also wait on a Task that returns from your void async

How to negate code in "if" statement block in JavaScript -JQuery like 'if not then..'

You can use the Logical NOT ! operator:

if (!$(this).parent().next().is('ul')){

Or equivalently (see comments below):

if (! ($(this).parent().next().is('ul'))){

For more information, see the Logical Operators section of the MDN docs.

How to check if "Radiobutton" is checked?

radioButton.isChecked() function returns true if the Radion button is chosen, false otherwise.

Source

Ansible: copy a directory content to another directory

You could use the synchronize module. The example from the documentation:

# Synchronize two directories on one remote host.
- synchronize:
    src: /first/absolute/path
    dest: /second/absolute/path
  delegate_to: "{{ inventory_hostname }}"

This has the added benefit that it will be more efficient for large/many files.

jquery change style of a div on click

you can use .css method of jquery..

reference css method

Undo working copy modifications of one file in Git?

For me only this one worked

git checkout -p filename

pyplot scatter plot marker size

Because other answers here claim that s denotes the area of the marker, I'm adding this answer to clearify that this is not necessarily the case.

Size in points^2

The argument s in plt.scatter denotes the markersize**2. As the documentation says

s : scalar or array_like, shape (n, ), optional
size in points^2. Default is rcParams['lines.markersize'] ** 2.

This can be taken literally. In order to obtain a marker which is x points large, you need to square that number and give it to the s argument.

So the relationship between the markersize of a line plot and the scatter size argument is the square. In order to produce a scatter marker of the same size as a plot marker of size 10 points you would hence call scatter( .., s=100).

import matplotlib.pyplot as plt

fig,ax = plt.subplots()

ax.plot([0],[0], marker="o",  markersize=10)
ax.plot([0.07,0.93],[0,0],    linewidth=10)
ax.scatter([1],[0],           s=100)

ax.plot([0],[1], marker="o",  markersize=22)
ax.plot([0.14,0.86],[1,1],    linewidth=22)
ax.scatter([1],[1],           s=22**2)

plt.show()

Connection to "area"

So why do other answers and even the documentation speak about "area" when it comes to the s parameter?

Of course the units of points**2 are area units.

For the special case of a square marker, marker="s", the area of the marker is indeed directly the value of the s parameter.
For a circle, the area of the circle is area = pi/4*s.
For other markers there may not even be any obvious relation to the area of the marker.

In all cases however the area of the marker is proportional to the s parameter. This is the motivation to call it "area" even though in most cases it isn't really.

Specifying the size of the scatter markers in terms of some quantity which is proportional to the area of the marker makes in thus far sense as it is the area of the marker that is perceived when comparing different patches rather than its side length or diameter. I.e. doubling the underlying quantity should double the area of the marker.

What are points?

So far the answer to what the size of a scatter marker means is given in units of points. Points are often used in typography, where fonts are specified in points. Also linewidths is often specified in points. The standard size of points in matplotlib is 72 points per inch (ppi) - 1 point is hence 1/72 inches.

It might be useful to be able to specify sizes in pixels instead of points. If the figure dpi is 72 as well, one point is one pixel. If the figure dpi is different (matplotlib default is fig.dpi=100),

1 point == fig.dpi/72. pixels

While the scatter marker's size in points would hence look different for different figure dpi, one could produce a 10 by 10 pixels^2 marker, which would always have the same number of pixels covered:

import matplotlib.pyplot as plt

for dpi in [72,100,144]:

    fig,ax = plt.subplots(figsize=(1.5,2), dpi=dpi)
    ax.set_title("fig.dpi={}".format(dpi))

    ax.set_ylim(-3,3)
    ax.set_xlim(-2,2)

    ax.scatter([0],[1], s=10**2, 
               marker="s", linewidth=0, label="100 points^2")
    ax.scatter([1],[1], s=(10*72./fig.dpi)**2, 
               marker="s", linewidth=0, label="100 pixels^2")

    ax.legend(loc=8,framealpha=1, fontsize=8)

    fig.savefig("fig{}.png".format(dpi), bbox_inches="tight")

plt.show()

If you are interested in a scatter in data units, check this answer.

How to select element using XPATH syntax on Selenium for Python?

Check this blog by Martin Thoma. I tested the below code on MacOS Mojave and it worked as specified.

> def get_browser():
>     """Get the browser (a "driver")."""
>     # find the path with 'which chromedriver'
>     path_to_chromedriver = ('/home/moose/GitHub/algorithms/scraping/'
>                             'venv/bin/chromedriver')
>     download_dir = "/home/moose/selenium-download/"
>     print("Is directory: {}".format(os.path.isdir(download_dir)))
> 
>     from selenium.webdriver.chrome.options import Options
>     chrome_options = Options()
>     chrome_options.add_experimental_option('prefs', {
>         "plugins.plugins_list": [{"enabled": False,
>                                   "name": "Chrome PDF Viewer"}],
>         "download": {
>             "prompt_for_download": False,
>             "default_directory": download_dir
>         }
>     })
> 
>     browser = webdriver.Chrome(path_to_chromedriver,
>                                chrome_options=chrome_options)
>     return browser

JavaFX Location is not set error message

The answer below by CsPeitch and others is on the right track. Just make sure that the fxml file is being copied over to your class output target, or the runtime will not see it. Check the generated class file directory and see if the fxml is there

Get and Set a Single Cookie with Node.js HTTP Server

If you're using the express library, as many node.js developers do, there is an easier way. Check the Express.js documentation page for more information.

The parsing example above works but express gives you a nice function to take care of that:

app.use(express.cookieParser());

To set a cookie:

res.cookie('cookiename', 'cookievalue', { maxAge: 900000, httpOnly: true });

To clear the cookie:

res.clearCookie('cookiename');

How can I generate a unique ID in Python?

Perhaps uuid.uuid4() might do the job. See uuid for more information.

Converting SVG to PNG using C#

you can use altsoft xml2pdf lib for this

Is there an equivalent of CSS max-width that works in HTML emails?

Bit late to the party, but this will get it done. I left the example at 600, as that is what most people will use:

Similar to Shay's example except this also includes max-width to work on the rest of the clients that do have support, as well as a second method to prevent the expansion (media query) which is needed for Outlook '11.

In the head:

  <style type="text/css">
    @media only screen and (min-width: 600px) { .maxW { width:600px !important; } }
  </style>

In the body:

<!--[if (gte mso 9)|(IE)]><table width="600" align="center" cellpadding="0" cellspacing="0" border="0"><tr><td><![endif]-->
<div class="maxW" style="max-width:600px;">

<table width="100%" border="0" cellpadding="0" cellspacing="0" bgcolor="#FFFFFF">
  <tr>
    <td>
main content here
    </td>
  </tr>
</table>

</div>
<!--[if (gte mso 9)|(IE)]></td></tr></table><![endif]-->

Here is another example of this in use: Responsive order confirmation emails for mobile devices?

How do I disable "missing docstring" warnings at a file-level in Pylint?

Edit file "C:\Users\Your User\AppData\Roaming\Code\User\settings.json" and add these python.linting.pylintArgs lines at the end as shown below:

{
    "team.showWelcomeMessage": false,
    "python.dataScience.sendSelectionToInteractiveWindow": true,
    "git.enableSmartCommit": true,
    "powershell.codeFormatting.useCorrectCasing": true,
    "files.autoSave": "onWindowChange",
    "python.linting.pylintArgs": [
        "--load-plugins=pylint_django",
        "--errors-only"
    ],
}

Get HTML inside iframe using jQuery

Why not try Ajax, check a code part 1 or part 2 (use comment).

_x000D_

$(document).ready(function(){ _x000D_
 console.clear();_x000D_
/*_x000D_
    // PART 1 ERROR_x000D_
    // Uncaught SecurityError: Failed to read the 'contentDocument' property from 'HTMLIFrameElement': Sandbox access violation: Blocked a frame at "http://stacksnippets.net" from accessing a frame at "null".  Both frames are sandboxed and lack the "allow-same-origin" flag._x000D_
 console.log("PART 1:: ");_x000D_
 console.log($('iframe#sandro').contents().find("html").html());_x000D_
*/_x000D_
 // PART 2_x000D_
 $.ajax({_x000D_
  url: $("iframe#sandro").attr("src"),_x000D_
  type: 'GET',_x000D_
  dataType: 'html'_x000D_
 }).done(function(html) {_x000D_
  console.log("PART 2:: ");_x000D_
  console.log(html);_x000D_
 });_x000D_
_x000D_
});

_x000D_

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>_x000D_
<html>_x000D_
<body>_x000D_
<iframe id="sandro" src="https://jsfiddle.net/robots.txt"></iframe>_x000D_
</body>_x000D_
</html>

_x000D_

Sending command line arguments to npm script

jakub.g's answer is correct, however an example using grunt seems a bit complex.

So my simpler answer:

- Sending a command line argument to an npm script

Syntax for sending command line arguments to an npm script:

npm run [command] [-- <args>]

Imagine we have an npm start task in our package.json to kick off webpack dev server:

"scripts": {
  "start": "webpack-dev-server --port 5000"
},

We run this from the command line with npm start

Now if we want to pass in a port to the npm script:

"scripts": {
  "start": "webpack-dev-server --port process.env.port || 8080"
},

running this and passing the port e.g. 5000 via command line would be as follows:

npm start --port:5000

- Using package.json config:

As mentioned by jakub.g, you can alternatively set params in the config of your package.json

"config": {
  "myPort": "5000"
}

"scripts": {
  "start": "webpack-dev-server --port process.env.npm_package_config_myPort || 8080"
},

npm start will use the port specified in your config, or alternatively you can override it

npm config set myPackage:myPort 3000

- Setting a param in your npm script

An example of reading a variable set in your npm script. In this example NODE_ENV

"scripts": {
  "start:prod": "NODE_ENV=prod node server.js",
  "start:dev": "NODE_ENV=dev node server.js"
},

read NODE_ENV in server.js either prod or dev

var env = process.env.NODE_ENV || 'prod'

if(env === 'dev'){
    var app = require("./serverDev.js");
} else {
    var app = require("./serverProd.js");
}

Are there any style options for the HTML5 Date picker?

Currently, there is no cross browser, script-free way of styling a native date picker.

As for what's going on inside WHATWG/W3C... If this functionality does emerge, it will likely be under the CSS-UI standard or some Shadow DOM-related standard. The CSS4-UI wiki page lists a few appearance-related things that were dropped from CSS3-UI, but to be honest, there doesn't seem to be a great deal of interest in the CSS-UI module.

I think your best bet for cross browser development right now, is to implement pretty controls with JavaScript based interface, and then disable the HTML5 native UI and replace it. I think in the future, maybe there will be better native control styling, but perhaps more likely will be the ability to swap out a native control for your own Shadow DOM "widget".

It is annoying that this isn't available, and petitioning for standard support is always worthwhile. Though it does seem like jQuery UI's lead has tried and was unsuccessful.

While this is all very discouraging, it's also worth considering the advantages of the HTML5 date picker, and also why custom styles are difficult and perhaps should be avoided. On some platforms, the datepicker looks extremely different and I personally can't think of any generic way of styling the native datepicker.

getting " (1) no such column: _id10 " error

I think you missed a equal sign at:

Cursor c = ourDatabase.query(DATABASE_TABLE, column, KEY_ROWID + "" + l, null, null, null, null);

Change to:

Cursor c = ourDatabase.query(DATABASE_TABLE, column, KEY_ROWID + " = " + l, null, null, null, null);

What is "pass-through authentication" in IIS 7?

Normally, IIS would use the process identity (the user account it is running the worker process as) to access protected resources like file system or network.

With passthrough authentication, IIS will attempt to use the actual identity of the user when accessing protected resources.

If the user is not authenticated, IIS will use the application pool identity instead. If pool identity is set to NetworkService or LocalSystem, the actual Windows account used is the computer account.

The IIS warning you see is not an error, it's just a warning. The actual check will be performed at execution time, and if it fails, it'll show up in the log.

How do I do a Date comparison in Javascript?

I would rather use the Date valueOf method instead of === or !==

Seems like === is comparing internal Object's references and nothing concerning date.

How to convert HTML file to word?

A good option is to use an API like Docverter. Docverter will allow you to convert HTML to PDF or DOCX using an API.

Named regular expression group "(?P<group_name>regexp)": what does "P" stand for?

Since we're all guessing, I might as well give mine: I've always thought it stood for Python. That may sound pretty stupid -- what, P for Python?! -- but in my defense, I vaguely remembered this thread [emphasis mine]:

Subject: Claiming (?P...) regex syntax extensions

From: Guido van Rossum ([email protected])

Date: Dec 10, 1997 3:36:19 pm

I have an unusual request for the Perl developers (those that develop the Perl language). I hope this (perl5-porters) is the right list. I am cc'ing the Python string-sig because it is the origin of most of the work I'm discussing here.

You are probably aware of Python. I am Python's creator; I am planning to release a next "major" version, Python 1.5, by the end of this year. I hope that Python and Perl can co-exist in years to come; cross-pollination can be good for both languages. (I believe Larry had a good look at Python when he added objects to Perl 5; O'Reilly publishes books about both languages.)

As you may know, Python 1.5 adds a new regular expression module that more closely matches Perl's syntax. We've tried to be as close to the Perl syntax as possible within Python's syntax. However, the regex syntax has some Python-specific extensions, which all begin with (?P . Currently there are two of them:

(?P<foo>...) Similar to regular grouping parentheses, but the text
matched by the group is accessible after the match has been performed, via the symbolic group name "foo".

(?P=foo) Matches the same string as that matched by the group named "foo". Equivalent to \1, \2, etc. except that the group is referred
to by name, not number.

I hope that this Python-specific extension won't conflict with any future Perl extensions to the Perl regex syntax. If you have plans to use (?P, please let us know as soon as possible so we can resolve the conflict. Otherwise, it would be nice if the (?P syntax could be permanently reserved for Python-specific syntax extensions. (Is there some kind of registry of extensions?)

to which Larry Wall replied:

[...] There's no registry as of now--yours is the first request from outside perl5-porters, so it's a pretty low-bandwidth activity. (Sorry it was even lower last week--I was off in New York at Internet World.)

Anyway, as far as I'm concerned, you may certainly have 'P' with my blessing. (Obviously Perl doesn't need the 'P' at this point. :-) [...]

So I don't know what the original choice of P was motivated by -- pattern? placeholder? penguins? -- but you can understand why I've always associated it with Python. Which considering that (1) I don't like regular expressions and avoid them wherever possible, and (2) this thread happened fifteen years ago, is kind of odd.

Call a method of a controller from another controller using 'scope' in AngularJS

Here is good Demo in Fiddle how to use shared service in directive and other controllers through $scope.$on

HTML

<div ng-controller="ControllerZero">
    <input ng-model="message" >
    <button ng-click="handleClick(message);">BROADCAST</button>
</div>

<div ng-controller="ControllerOne">
    <input ng-model="message" >
</div>

<div ng-controller="ControllerTwo">
    <input ng-model="message" >
</div>

<my-component ng-model="message"></my-component>

var myModule = angular.module('myModule', []);

myModule.factory('mySharedService', function($rootScope) {
    var sharedService = {};

    sharedService.message = '';

    sharedService.prepForBroadcast = function(msg) {
        this.message = msg;
        this.broadcastItem();
    };

    sharedService.broadcastItem = function() {
        $rootScope.$broadcast('handleBroadcast');
    };

    return sharedService;
});

By the same way we can use shared service in directive. We can implement controller section into directive and use $scope.$on

myModule.directive('myComponent', function(mySharedService) {
    return {
        restrict: 'E',
        controller: function($scope, $attrs, mySharedService) {
            $scope.$on('handleBroadcast', function() {
                $scope.message = 'Directive: ' + mySharedService.message;
            });
        },
        replace: true,
        template: '<input>'
    };
});

And here three our controllers where ControllerZero used as trigger to invoke prepForBroadcast

function ControllerZero($scope, sharedService) {
    $scope.handleClick = function(msg) {
        sharedService.prepForBroadcast(msg);
    };

    $scope.$on('handleBroadcast', function() {
        $scope.message = sharedService.message;
    });
}

function ControllerOne($scope, sharedService) {
    $scope.$on('handleBroadcast', function() {
        $scope.message = 'ONE: ' + sharedService.message;
    });
}

function ControllerTwo($scope, sharedService) {
    $scope.$on('handleBroadcast', function() {
        $scope.message = 'TWO: ' + sharedService.message;
    });
}

The ControllerOne and ControllerTwo listen message change by using $scope.$on handler.

"Strict Standards: Only variables should be passed by reference" error

Instead of parsing it manually it's better to use pathinfo function:

$path_parts = pathinfo($value);
$extension = strtolower($path_parts['extension']);
$fileName = $path_parts['filename'];

How can I use nohup to run process as a background process in linux?

In general, I use nohup CMD & to run a nohup background process. However, when the command is in a form that nohup won't accept then I run it through bash -c "...".

For example:

nohup bash -c "(time ./script arg1 arg2 > script.out) &> time_n_err.out" &

stdout from the script gets written to script.out, while stderr and the output of time goes into time_n_err.out.

So, in your case:

nohup bash -c "(time bash executeScript 1 input fileOutput > scrOutput) &> timeUse.txt" &

Set Canvas size using javascript

Try this:

var setCanvasSize = function() {
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
}

How to set a JVM TimeZone Properly

The accepted answer above:

-Duser.timezone="Europe/Sofia"

Didn't work for me exactly. I only was able to successfully change my timezone when I didn't have quotes around the parameters:

-Duser.timezone=Europe/Sofia

JavaScript REST client Library

Dojo does, e.g. via JsonRestStore, see http://www.sitepen.com/blog/2008/06/13/restful-json-dojo-data/ .

Python: How to remove empty lists from a list?

Try

list2 = [x for x in list1 if x != []]

If you want to get rid of everything that is "falsy", e.g. empty strings, empty tuples, zeros, you could also use

list2 = [x for x in list1 if x]

What is the difference between dynamic programming and greedy approach?

I would like to cite a paragraph which describes the major difference between greedy algorithms and dynamic programming algorithms stated in the book Introduction to Algorithms (3rd edition) by Cormen, Chapter 15.3, page 381:

One major difference between greedy algorithms and dynamic programming is that instead of first finding optimal solutions to subproblems and then making an informed choice, greedy algorithms first make a greedy choice, the choice that looks best at the time, and then solve a resulting subproblem, without bothering to solve all possible related smaller subproblems.

How do you decrease navbar height in Bootstrap 3?

For Bootstrap 4
Some of the previous answers are not working for Bootstrap 4. To reduce the size of the navigation bar in this version, I suggest eliminating the padding like this.

.navbar { padding-top: 0.25rem; padding-bottom: 0.25rem; }

You could try with other styles too.
The styles I found that define the total height of the navigation bar are:

padding-top and padding-bottom are set to 0.5rem for .navbar.
padding-top and padding-bottom are set to 0.5rem for .navbar-text.
besides a line-height of 1.5rem inherited from the body.

Thus, in total the navigation bar is 3.5 times the root font size.

In my case, which I was using big font sizes; I redefined the ".navbar" class in my CSS file like this:

.navbar {
  padding-top:    0.25rem; /* 0px does not look good on small screens */
  padding-bottom: 0.25rem;
  font-size: smaller;      /* Just because I am using big size font */
  line-height: 1em;
}

Final comment, avoid using absolute values when playing with the previous styles. Use the units rem or em instead.

Android offline documentation and sample codes

This thread is a little old, and I am brand new to this, but I think I found the preferred solution.

First, I assume that you are using Eclipse and the Android ADT plugin.

In Eclipse, choose Window/Android SDK Manager. In the display, expand the entry for the MOST RECENT PLATFORM, even if that is not the platform that your are developing for. As of Jan 2012, it is "Android 4.0.3 (API 15)". When expanded, the first entry is "Documentation for Android SDK" Click the checkbox next to it, and then click the "Install" button.

When done, you should have a new directory in your "android-sdks" called "doc". Look for "offline.html" in there. Since this is packaged with the most recent version, it will document the most recent platform, but it should also show the APIs for previous versions.

Sniff HTTP packets for GET and POST requests from an application

You will have to use some sort of network sniffer if you want to get at this sort of data and you're likely to run into the same problem (pulling out the relevant data from the overall network traffic) with those that you do now with Wireshark.

What is the reason and how to avoid the [FIN, ACK] , [RST] and [RST, ACK]

Here is a rough explanation of the concepts.

[ACK] is the acknowledgement that the previously sent data packet was received.

[FIN] is sent by a host when it wants to terminate the connection; the TCP protocol requires both endpoints to send the termination request (i.e. FIN).

So, suppose

host A sends a data packet to host B
and then host B wants to close the connection.
Host B (depending on timing) can respond with [FIN,ACK] indicating that it received the sent packet and wants to close the session.
Host A should then respond with a [FIN,ACK] indicating that it received the termination request (the ACK part) and that it too will close the connection (the FIN part).

However, if host A wants to close the session after sending the packet, it would only send a [FIN] packet (nothing to acknowledge) but host B would respond with [FIN,ACK] (acknowledges the request and responds with FIN).

Finally, some TCP stacks perform half-duplex termination, meaning that they can send [RST] instead of the usual [FIN,ACK]. This happens when the host actively closes the session without processing all the data that was sent to it. Linux is one operating system which does just this.

You can find a more detailed and comprehensive explanation here.

Are the days of passing const std::string & as a parameter over?

Short answer: NO! Long answer:

If you won't modify the string (treat is as read-only), pass it as const ref&.
(the const ref& obviously needs to stay within scope while the function that uses it executes)
If you plan to modify it or you know it will get out of scope (threads), pass it as a value, don't copy the const ref& inside your function body.

There was a post on cpp-next.com called "Want speed, pass by value!". The TL;DR:

Guideline: Don’t copy your function arguments. Instead, pass them by value and let the compiler do the copying.

TRANSLATION of ^

Don’t copy your function arguments --- means: if you plan to modify the argument value by copying it to an internal variable, just use a value argument instead.

So, don't do this:

std::string function(const std::string& aString){
    auto vString(aString);
    vString.clear();
    return vString;
}

do this:

std::string function(std::string aString){
    aString.clear();
    return aString;
}

When you need to modify the argument value in your function body.

You just need to be aware how you plan to use the argument in the function body. Read-only or NOT... and if it sticks within scope.

Matplotlib scatter plot legend

Here's an easier way of doing this (source: here):

import matplotlib.pyplot as plt
from numpy.random import rand


fig, ax = plt.subplots()
for color in ['red', 'green', 'blue']:
    n = 750
    x, y = rand(2, n)
    scale = 200.0 * rand(n)
    ax.scatter(x, y, c=color, s=scale, label=color,
               alpha=0.3, edgecolors='none')

ax.legend()
ax.grid(True)

plt.show()

And you'll get this:

Take a look at here for legend properties

Difference between UTF-8 and UTF-16?

They're simply different schemes for representing Unicode characters.

Both are variable-length - UTF-16 uses 2 bytes for all characters in the basic multilingual plane (BMP) which contains most characters in common use.

UTF-8 uses between 1 and 3 bytes for characters in the BMP, up to 4 for characters in the current Unicode range of U+0000 to U+1FFFFF, and is extensible up to U+7FFFFFFF if that ever becomes necessary... but notably all ASCII characters are represented in a single byte each.

For the purposes of a message digest it won't matter which of these you pick, so long as everyone who tries to recreate the digest uses the same option.

See this page for more about UTF-8 and Unicode.

(Note that all Java characters are UTF-16 code points within the BMP; to represent characters above U+FFFF you need to use surrogate pairs in Java.)

What's the difference between a Future and a Promise?

No set method in Future interface, only get method, so it is read-only. About CompletableFuture, this article maybe helpful. completablefuture

Can I replace groups in Java regex?

Use $n (where n is a digit) to refer to captured subsequences in replaceFirst(...). I'm assuming you wanted to replace the first group with the literal string "number" and the second group with the value of the first group.

Pattern p = Pattern.compile("(\\d)(.*)(\\d)");
String input = "6 example input 4";
Matcher m = p.matcher(input);
if (m.find()) {
    // replace first number with "number" and second number with the first
    String output = m.replaceFirst("number $3$1");  // number 46
}

Consider (\D+) for the second group instead of (.*). * is a greedy matcher, and will at first consume the last digit. The matcher will then have to backtrack when it realizes the final (\d) has nothing to match, before it can match to the final digit.

How do you check if a variable is an array in JavaScript?

You could also use:

if (value instanceof Array) {
  alert('value is Array!');
} else {
  alert('Not an array');
}

This seems to me a pretty elegant solution, but to each his own.

Edit:

As of ES5 there is now also:

Array.isArray(value);

But this will break on older browsers, unless you are using polyfills (basically... IE8 or similar).

getFilesDir() vs Environment.getDataDirectory()

From the HERE and HERE

public File getFilesDir ()

Returns the absolute path to the directory on the filesystem where files created with openFileOutput(String, int) are stored.

public static File getExternalStorageDirectory ()

Return the primary external storage directory. This directory may not currently be accessible if it has been mounted by the user on their computer, has been removed from the device, or some other problem has happened. You can determine its current state with getExternalStorageState().

Note: don't be confused by the word "external" here. This directory can better be thought as media/shared storage. It is a filesystem that can hold a relatively large amount of data and that is shared across all applications (does not enforce permissions). Traditionally this is an SD card, but it may also be implemented as built-in storage in a device that is distinct from the protected internal storage and can be mounted as a filesystem on a computer.

On devices with multiple users (as described by UserManager), each user has their own isolated external storage. Applications only have access to the external storage for the user they're running as.

If you want to get your application path use getFilesDir() which will give you path /data/data/your package/files

You can get the path using the Environment var of your data/package using the

getExternalFilesDir(Environment.getDataDirectory().getAbsolutePath()).getAbsolutePath(); which will return the path from the root directory of your external storage as /storage/sdcard/Android/data/your pacakge/files/data

To access the external resources you have to provide the permission of WRITE_EXTERNAL_STORAGE and READ_EXTERNAL_STORAGE in your manifest.

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

Check out the Best Documentation to get the paths of direcorty

how to add the missing RANDR extension

First off, Xvfb doesn't read configuration from xorg.conf. Xvfb is a variant of the KDrive X servers and like all members of that family gets its configuration from the command line.

It is true that XRandR and Xinerama are mutually exclusive, but in the case of Xvfb there's no Xinerama in the first place. You can enable the XRandR extension by starting Xvfb using at least the following command line options

Xvfb +extension RANDR [further options]

pass JSON to HTTP POST Request

       var request = require('request');
        request({
            url: "http://localhost:8001/xyz",
            json: true,
            headers: {
                "content-type": "application/json",
            },
            body: JSON.stringify(requestData)
        }, function(error, response, body) {
            console.log(response);
        });

I need a Nodejs scheduler that allows for tasks at different intervals

I think the best ranking is

1.node-schedule

2.later

3.crontab

and the sample of node-schedule is below:

var schedule = require("node-schedule");
var rule = new schedule.RecurrenceRule();
//rule.minute = 40;
rule.second = 10;
var jj = schedule.scheduleJob(rule, function(){
    console.log("execute jj");
});

Maybe you can find the answer from node modules.

How does Spring autowire by name when more than one matching bean is found?

One more solution with resolving by name:

@Resource(name="country")

It uses javax.annotation package, so it's not Spring specific, but Spring supports it.

Multiple file extensions in OpenFileDialog

This is from MSDN sample:

(*.bmp, *.jpg)|*.bmp;*.jpg

So for your case

openFileDialog1.Filter = "JPG (*.jpg,*.jpeg)|*.jpg;*.jpeg|TIFF (*.tif,*.tiff)|*.tif;*.tiff"

How to convert unsigned long to string

char buffer [50];

unsigned long a = 5;

int n=sprintf (buffer, "%lu", a);

How to Generate a random number of fixed length using JavaScript?

I was thinking about the same today and then go with the solution.

var generateOTP = function(otpLength=6) {
  let baseNumber = Math.pow(10, otpLength -1 );
  let number = Math.floor(Math.random()*baseNumber);
  /*
  Check if number have 0 as first digit
  */
  if (number < baseNumber) {
    number += baseNumber;
  }
  return number;
};

Let me know if it has any bug. Thanks.

rbenv not changing ruby version

There a lot of of misleading answers that work. I thought it was worth mentioning the steps from the rbenv README.

$ brew install rbenv
$ rbenv init and follow the instructions it gives you. This is what I got:

~ $ rbenv init
# Load rbenv automatically by appending
# the following to ~/.bash_profile:

eval "$(rbenv init -)"

I updated my ~/.bash_profile...

Close terminal and open it again
Verify it's working correctly by running:

$ curl -fsSL https://github.com/rbenv/rbenv-installer/raw/master/bin/rbenv-doctor | bash

Now just install the version you want by doing: rbenv install <version>

How to properly set Column Width upon creating Excel file? (Column properties)

I did it this way:

var xlApp = new Excel.Application();
var xlWorkBook = xlApp.Workbooks.Add(System.Reflection.Missing.Value);
var xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.Item[1];
xlWorkSheet.Columns.AutoFit();

With this way, columns always fit to text width inside cells.

Hope it helps to someone!

Mercurial: how to amend the last commit?

I'm tuning into what krtek has written. More specifically solution 1:

Assumptions:

you've committed one (!) changeset but have not pushed it yet
you want to modify this changeset (e.g. add, remove or change files and/or the commit message)

Solution:

use hg rollback to undo the last commit
commit again with the new changes in place

The rollback really undoes the last operation. Its way of working is quite simple: normal operations in HG will only append to files; this includes a commit. Mercurial keeps track of the file lengths of the last transaction and can therefore completely undo one step by truncating the files back to their old lengths.

How to debug in Django, the good way?

use pdb or ipdb. Diffrence between these two is ipdb supports auto complete.

for pdb

import pdb
pdb.set_trace()

for ipdb

import ipdb
ipdb.set_trace()

For executing new line hit n key, for continue hit c key. check more options by using help(pdb)

How to convert the following json string to java object?

No need to go with GSON for this; Jackson can do either plain Maps/Lists:

ObjectMapper mapper = new ObjectMapper();
Map<String,Object> map = mapper.readValue(json, Map.class);

or more convenient JSON Tree:

JsonNode rootNode = mapper.readTree(json);

By the way, there is no reason why you could not actually create Java classes and do it (IMO) more conveniently:

public class Library {
  @JsonProperty("libraryname")
  public String name;

  @JsonProperty("mymusic")
  public List<Song> songs;
}
public class Song {
  @JsonProperty("Artist Name") public String artistName;
  @JsonProperty("Song Name") public String songName;
}

Library lib = mapper.readValue(jsonString, Library.class);

How to create Toast in Flutter?

to show toast message you can use flutterToast plugin to use this plugin you have to

Add this dependency to your pubspec.yaml file :- fluttertoast: ^3.1.0
to get the package you have to run this command :- $ flutter packages get
import the package :- import 'package:fluttertoast/fluttertoast.dart';

use it like this

Fluttertoast.showToast(
        msg: "your message",
        toastLength: Toast.LENGTH_SHORT,
        gravity: ToastGravity.BOTTOM // also possible "TOP" and "CENTER"
        backgroundColor: "#e74c3c",
        textColor: '#ffffff');

For more info check this

Registering for Push Notifications in Xcode 8/Swift 3.0?

In iOS10 instead of your code, you should request an authorization for notification with the following: (Don't forget to add the UserNotifications Framework)

if #available(iOS 10.0, *) {
        UNUserNotificationCenter.current().requestAuthorization([.alert, .sound, .badge]) { (granted: Bool, error: NSError?) in
            // Do something here
        }
    }

Also, the correct code for you is (use in the else of the previous condition, for example):

let setting = UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
UIApplication.shared().registerUserNotificationSettings(setting)
UIApplication.shared().registerForRemoteNotifications()

Finally, make sure Push Notification is activated under target-> Capabilities -> Push notification. (set it on On)

how to include glyphicons in bootstrap 3

I think your particular problem isn't how to use Glyphicons but understanding how Bootstrap files work together.

Bootstrap requires a specific file structure to work. I see from your code you have this:

<link href="bootstrap.css" rel="stylesheet" media="screen">

Your Bootstrap.css is being loaded from the same location as your page, this would create a problem if you didn't adjust your file structure.

But first, let me recommend you setup your folder structure like so:

/css      <-- Bootstrap.css here
/fonts    <-- Bootstrap fonts here
/img
/js       <-- Bootstrap JavaScript here
index.html

If you notice, this is also how Bootstrap structures its files in its download ZIP.

You then include your Bootstrap file like so:

<link href="css/bootstrap.css" rel="stylesheet" media="screen">
or
<link href="./css/bootstrap.css" rel="stylesheet" media="screen">
or
<link href="/css/bootstrap.css" rel="stylesheet" media="screen">

Depending on your server structure or what you're going for.

The first and second are relative to your file's current directory. The second one is just more explicit by saying "here" (./) first then css folder (/css).

The third is good if you're running a web server, and you can just use relative to root notation as the leading "/" will be always start at the root folder.

So, why do this?

Bootstrap.css has this specific line for Glyphfonts:

@font-face {
    font-family: 'Glyphicons Halflings';
    src: url('../fonts/glyphicons-halflings-regular.eot');
    src: url('../fonts/glyphicons-halflings-regular.eot?#iefix') format('embedded-opentype'), url('../fonts/glyphicons-halflings-regular.woff') format('woff'), url('../fonts/glyphicons-halflings-regular.ttf') format('truetype'), url('../fonts/glyphicons-halflings-regular.svg#glyphicons-halflingsregular') format('svg');
}

What you can see is that that Glyphfonts are loaded by going up one directory ../ and then looking for a folder called /fonts and THEN loading the font file.

The URL address is relative to the location of the CSS file. So, if your CSS file is at the same location like this:

/fonts
Bootstrap.css
index.html

The CSS file is going one level deeper than looking for a /fonts folder.

So, let's say the actual location of these files are:

C:\www\fonts
C:\www\Boostrap.css
C:\www\index.html

The CSS file would technically be looking for a folder at:

C:\fonts

but your folder is actually in:

C:\www\fonts

So see if that helps. You don't have to do anything 'special' to load Bootstrap Glyphicons, except make sure your folder structure is set up appropriately.

When you get that fixed, your HTML should simply be:

<span class="glyphicon glyphicon-comment"></span>

Note, you need both classes. The first class glyphicon sets up the basic styles while glyphicon-comment sets the specific image.

What does template <unsigned int N> mean?

It's perfectly possible to template a class on an integer rather than a type. We can assign the templated value to a variable, or otherwise manipulate it in a way we might with any other integer literal:

unsigned int x = N;

In fact, we can create algorithms which evaluate at compile time (from Wikipedia):

template <int N>
struct Factorial 
{
     enum { value = N * Factorial<N - 1>::value };
};

template <>
struct Factorial<0> 
{
    enum { value = 1 };
};

// Factorial<4>::value == 24
// Factorial<0>::value == 1
void foo()
{
    int x = Factorial<4>::value; // == 24
    int y = Factorial<0>::value; // == 1
}

Link a .css on another folder

I think what you want to do is

_x000D_

<link rel="stylesheet" type="text/css" href="font/font-face/my-font-face.css">

_x000D_

Application Error - The connection to the server was unsuccessful. (file:///android_asset/www/index.html)

In your config.xml file add this line:

<preference name="loadUrlTimeoutValue" value="700000" />

HTML5 Email Validation

It is very difficult to validate Email correctly simply using HTML5 attribute "pattern". If you do not use a "pattern" someone@ will be processed. which is NOT valid email.

Using pattern="[a-zA-Z]{3,}@[a-zA-Z]{3,}[.]{1}[a-zA-Z]{2,}[.]{1}[a-zA-Z]{2,}" will require the format to be [email protected] however if the sender has a format like [email protected] (or similar) will not be validated to fix this you could put pattern="[a-zA-Z]{3,}@[a-zA-Z]{3,}[.]{1}[a-zA-Z]{2,}[.]{1}[a-zA-Z]{2,}[.]{1}[a-zA-Z]{2,}" this will validate ".com.au or .net.au or alike.

However using this, it will not permit [email protected] to validate. So as far as simply using HTML5 to validate email addresses is still not totally with us. To Complete this you would use something like this:

<form>
<input id="email" type="text" name="email" pattern="[a-zA-Z]{3,}@[a-zA-Z]{3,}[.]{1}[a-zA-Z]{2,}[.]{1}[a-zA-Z]{2,}" required placeholder="Enter you Email">
<br>
<input type="submit" value="Submit The Form">
</form>

or:

<form>
<input id="email" type="text" name="email" pattern="[a-zA-Z]{3,}@[a-zA-Z]{3,}[.]{1}[a-zA-Z]{2,}[.]{1}[a-zA-Z]{2,}[.]{1}[a-zA-Z]{2,}" required placeholder="Enter you Email">
<br>
<input type="submit" value="Submit The Form">
</form>

However, I do not know how to validate both or all versions of email addresses using HTML5 pattern attribute.

Getting a better understanding of callback functions in JavaScript

There are 3 main possibilities to execute a function:

var callback = function(x, y) {
    // "this" may be different depending how you call the function
    alert(this);
};

callback(argument_1, argument_2);
callback.call(some_object, argument_1, argument_2);
callback.apply(some_object, [argument_1, argument_2]);

The method you choose depends whether:

You have the arguments stored in an Array or as distinct variables.
You want to call that function in the context of some object. In this case, using the "this" keyword in that callback would reference the object passed as argument in call() or apply(). If you don't want to pass the object context, use null or undefined. In the latter case the global object would be used for "this".

Docs for Function.call, Function.apply

Java 8 method references: provide a Supplier capable of supplying a parameterized result

optionalUsers.orElseThrow(() -> new UsernameNotFoundException("Username not found"));

.NET code to send ZPL to Zebra printers

Figured since this is still showing up high in search results for C# and ZPL I should mention SharpZebra. It's only EPL2, but I've submitted an update that adds ZPL support along with printing via sockets, the Windows Spool Service and direct USB.

org.hibernate.PersistentObjectException: detached entity passed to persist

You didn't provide many relevant details so I will guess that you called getInvoice and then you used result object to set some values and call save with assumption that your object changes will be saved.

However, persist operation is intended for brand new transient objects and it fails if id is already assigned. In your case you probably want to call saveOrUpdate instead of persist.

You can find some discussion and references here "detached entity passed to persist error" with JPA/EJB code

How to submit a form with JavaScript by clicking a link?

If you use jQuery and would need an inline solution, this would work very well;

<a href="#" onclick="$(this).closest('form').submit();">submit form</a>

Also, you might want to replace

<a href="#">text</a>

with

<a href="javascript:void(0);">text</a>

so the user does not scroll to the top of your page when clicking the link.

How to see PL/SQL Stored Function body in Oracle

SELECT text 
FROM all_source
where name = 'FGETALGOGROUPKEY'
order by line

alternatively:

select dbms_metadata.get_ddl('FUNCTION', 'FGETALGOGROUPKEY')
from dual;

Coerce multiple columns to factors at once

and, for completeness and with regards to this question asking about changing string columns only, there's mutate_if:

data <- cbind(stringVar = sample(c("foo","bar"),10,replace=TRUE),
              data.frame(matrix(sample(1:40), 10, 10, dimnames = list(1:10, LETTERS[1:10]))),stringsAsFactors=FALSE)     

factoredData = data %>% mutate_if(is.character,funs(factor(.)))

Value cannot be null. Parameter name: source

My mistake was forgetting to add the .ThenInclude(s => s.SubChildEntities) onto the parent .Include(c => c.SubChildEntities) to the Controller action when attempting to call the SubChildEntities in the Razor view.

var <parent> = await _context.Parent
            .Include(c => c.<ChildEntities>)
            .ThenInclude(s => s.<SubChildEntities>)
            .SingleOrDefaultAsync(m => m.Id == id);

It should be noted that Visual Studio 2017 Community's IntelliSense doesn't pick up the SubChildEntities object in the lambda expression in the .ThenInclude(). It does successfully compile and execute though.

Merge some list items in a Python List

just a variation

alist=["a", "b", "c", "d", "e", 0, "g"]
alist[3:6] = [''.join(map(str,alist[3:6]))]
print alist

How to pass dictionary items as function arguments in python?

*data interprets arguments as tuples, instead you have to pass **data which interprets the arguments as dictionary.

data = {'school':'DAV', 'class': '7', 'name': 'abc', 'city': 'pune'}


def my_function(**data):
    schoolname  = data['school']
    cityname = data['city']
    standard = data['class']
    studentname = data['name']

You can call the function like this:

my_function(**data)

How do we determine the number of days for a given month in python

Just for the sake of academic interest, I did it this way...

(dt.replace(month = dt.month % 12 +1, day = 1)-timedelta(days=1)).day

Elastic Search: how to see the indexed data

Kibana is also a good solution. It is a data visualization platform for Elastic.If installed it runs by default on port 5601.

Out of the many things it provides. It has "Dev Tools" where we can do your debugging.

For example you can check your available indexes here using the command

GET /_cat/indices

Get rid of "The value for annotation attribute must be a constant expression" message

This is what a constant expression in Java looks like:

package com.mycompany.mypackage;

public class MyLinks {
  // constant expression
  public static final String GUESTBOOK_URL = "/guestbook";
}

You can use it with annotations as following:

import com.mycompany.mypackage.MyLinks;

@WebServlet(urlPatterns = {MyLinks.GUESTBOOK_URL})
public class GuestbookServlet extends HttpServlet {
  // ...
}

Cannot Resolve Collation Conflict

The thing about collations is that although the database has its own collation, every table, and every column can have its own collation. If not specified it takes the default of its parent object, but can be different.

When you change collation of the database, it will be the new default for all new tables and columns, but it doesn't change the collation of existing objects inside the database. You have to go and change manually the collation of every table and column.

Luckily there are scripts available on the internet that can do the job. I am not going to recommend any as I haven't tried them but here are few links:

http://www.codeproject.com/Articles/302405/The-Easy-way-of-changing-Collation-of-all-Database

Update Collation of all fields in database on the fly

http://www.sqlservercentral.com/Forums/Topic820675-146-1.aspx

If you need to have different collation on two objects or can't change collations - you can still JOIN between them using COLLATE command, and choosing the collation you want for join.

SELECT * FROM A JOIN B ON A.Text = B.Text COLLATE Latin1_General_CI_AS

or using default database collation:

SELECT * FROM A JOIN B ON A.Text = B.Text COLLATE DATABASE_DEFAULT

SQL Server equivalent to MySQL enum data type?

CREATE FUNCTION ActionState_Preassigned()
RETURNS tinyint
AS
BEGIN
    RETURN 0
END

GO

CREATE FUNCTION ActionState_Unassigned()
RETURNS tinyint
AS
BEGIN
    RETURN 1
END

-- etc...

Where performance matters, still use the hard values.

How to configure welcome file list in web.xml

This is my way to setup Servlet as welcome page.

I share for whom concern.

web.xml

  <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
    <servlet>
        <servlet-name>Demo</servlet-name>
        <servlet-class>servlet.Demo</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>Demo</servlet-name>
        <url-pattern></url-pattern>
    </servlet-mapping>

Servlet class

@WebServlet(name = "/demo")
public class Demo extends HttpServlet {
   public void doGet(HttpServletRequest req, HttpServletResponse res)
     throws ServletException, IOException  {
       RequestDispatcher rd = req.getRequestDispatcher("index.jsp");
   }
}

how to set the default value to the drop down list control?

After your DataBind():

lstDepartment.SelectedIndex = 0;  //first item

or

lstDepartment.SelectedValue = "Yourvalue"

or 
//add error checking, just an example, FindByValue may return null
lstDepartment.Items.FindByValue("Yourvalue").Selected = true;

or
//add error checking, just an example, FindByText may return null
lstDepartment.Items.FindByText("Yourvalue").Selected = true;

Storage permission error in Marshmallow

Android's permission system is one of the biggest security concern all along since those permissions are asked for at install time. Once installed, the application will be able to access all of things granted without any user's acknowledgement what exactly application does with the permission.

Android 6.0 Marshmallow introduces one of the largest changes to the permissions model with the addition of runtime permissions, a new permission model that replaces the existing install time permissions model when you target API 23 and the app is running on an Android 6.0+ device

Courtesy goes to Requesting Permissions at Run Time .

Example

Declare this as Global

private static final int PERMISSION_REQUEST_CODE = 1;

Add this in your onCreate() section

After setContentView(R.layout.your_xml);

 if (Build.VERSION.SDK_INT >= 23)
    {
        if (checkPermission())
        {
            // Code for above or equal 23 API Oriented Device 
            // Your Permission granted already .Do next code
        } else {
            requestPermission(); // Code for permission
        }
    }
  else
    {

       // Code for Below 23 API Oriented Device 
       // Do next code
    }

Now adding checkPermission() and requestPermission()

 private boolean checkPermission() {
    int result = ContextCompat.checkSelfPermission(Your_Activity.this, android.Manifest.permission.WRITE_EXTERNAL_STORAGE);
    if (result == PackageManager.PERMISSION_GRANTED) {
        return true;
    } else {
        return false;
    }
}

private void requestPermission() {

    if (ActivityCompat.shouldShowRequestPermissionRationale(Your_Activity.this, android.Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
        Toast.makeText(Your_Activity.this, "Write External Storage permission allows us to do store images. Please allow this permission in App Settings.", Toast.LENGTH_LONG).show();
    } else {
        ActivityCompat.requestPermissions(Your_Activity.this, new String[]{android.Manifest.permission.WRITE_EXTERNAL_STORAGE}, PERMISSION_REQUEST_CODE);
    }
}

@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
    switch (requestCode) {
        case PERMISSION_REQUEST_CODE:
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                Log.e("value", "Permission Granted, Now you can use local drive .");
            } else {
                Log.e("value", "Permission Denied, You cannot use local drive .");
            }
            break;
    }
}

FYI

onRequestPermissionsResult

This interface is the contract for receiving the results for permission requests.

Is the ternary operator faster than an "if" condition in Java

Try to use switch case statement but normally it's not the performance bottleneck.

How to change MySQL column definition?

Syntax to change column name in MySql:

alter table table_name change old_column_name new_column_name data_type(size);

Example:

alter table test change LowSal Low_Sal integer(4);

How do I pre-populate a jQuery Datepicker textbox with today's date?

Use This:

$(".datepicker").datepicker({ dateFormat: 'dd-M-yy' }).datepicker('setDate', new Date());

To Get Date in Format Eg: 10-Oct-2019 which will be more understandable for users.

IntelliJ how to zoom in / out

I assume that you have a similar view regarding the zoom functionality as I have in this picture:

enter image description here

Now if you mark one of the Zoom In/Zoom Out lines and choose Add Keyboard Shortcut:

enter image description here

You will find that this particular shortcut Numpad + is already occupied so there is a conflict:

enter image description here

So you'll just have assign this Zoom In/Zoom Out to some other keyboard shortcut:

enter image description here

jwt check if token expired

This is the answer if someone want to know

if (Date.now() >= exp * 1000) {
  return false;
}

Printing PDFs from Windows Command Line

I know this is and old question, but i was faced with the same problem recently and none of the answers worked for me:

Couldn't find an old Foxit Reader version
As @pilkch said 2Printer adds a report page
Adobe Reader opens a gui

After searching a little more i found this: http://www.columbia.edu/~em36/pdftoprinter.html.

It's a simple exe that you call with the filename and it prints to the default printer (or one that you specify). From the site:

PDFtoPrinter is a program for printing PDF files from the Windows command line. The program is designed generally for the Windows command line and also for use with the vDos DOS emulator.

To print a PDF file to the default Windows printer, use this command:

PDFtoPrinter.exe filename.pdf

To print to a specific printer, add the name of the printer in quotation marks:

PDFtoPrinter.exe filename.pdf "Name of Printer"

If you want to print to a network printer, use the name that appears in Windows print dialogs, like this (and be careful to note the two backslashes at the start of the name and the single backslash after the servername):

PDFtoPrinter.exe filename.pdf "\\SERVER\PrinterName"

Spring application context external properties?

One way to do it is to add your external config folder to the classpath of the java process. That's how I've often done it in the past.

How do you create a Spring MVC project in Eclipse?

You don't necessarily have to create a Spring project. Almost all Java web applications have he same project structure. In almost every project I create, I automatically add these source folder:

src/main/java
src/main/resources
src/test/java
src/test/resources
src/main/webapp*

src/main/webapp isn't actually a source folder. The web.xml file under src/main/webapp/WEB-INF will allow you to run your java application on any Java enabled web server (Tomcat, Jetty, etc.). I typically add the Jetty Plugin to my POM (assuming you use Maven), and launch the web app in development using mvn clean jetty:run.

How does a PreparedStatement avoid or prevent SQL injection?

In Prepared Statements the user is forced to enter data as parameters . If user enters some vulnerable statements like DROP TABLE or SELECT * FROM USERS then data won't be affected as these would be considered as parameters of the SQL statement

' << ' operator in verilog

<< is the left-shift operator, as it is in many other languages.

Here RAM_DEPTH will be 1 left-shifted by 8 bits, which is equivalent to 2^8, or 256.

Custom Drawable for ProgressBar/ProgressDialog

I'm not sure but in this case you can still go with a complete customized AlertDialog by having a seperate layout file set in the alert dialog and set the animation for your imageview using part of your above code that should also do it!

LIMIT 10..20 in SQL Server

Just for the record solution that works across most database engines though might not be the most efficient:

Select Top (ReturnCount) *
From (
    Select Top (SkipCount + ReturnCount) *
    From SourceTable
    Order By ReverseSortCondition
) ReverseSorted
Order By SortCondition

Pelase note: the last page would still contain ReturnCount rows no matter what SkipCount is. But that might be a good thing in many cases.

What is the attribute property="og:title" inside meta tag?

A degree of control is possible over how information travels from a third-party website to Facebook when a page is shared (or liked, etc.). In order to make this possible, information is sent via Open Graph meta tags in the <head> part of the website’s code.

ASP.NET Core - Swashbuckle not creating swagger.json file

In my case, I've had forgotten to set public access modifier for methods!

How can I count the number of characters in a Bash variable

Using the ${#VAR} syntax will calculate the number of characters in a variable.

https://www.gnu.org/software/bash/manual/bashref.html#Shell-Parameter-Expansion

Java 8 lambda get and remove element from list

Although the thread is quite old, still thought to provide solution - using Java8.

Make the use of removeIf function. Time complexity is O(n)

producersProcedureActive.removeIf(producer -> producer.getPod().equals(pod));

API reference: removeIf docs

Assumption: producersProcedureActive is a List

NOTE: With this approach you won't be able to get the hold of the deleted item.

Using a BOOL property

There's no benefit to using properties with primitive types. @property is used with heap allocated NSObjects like NSString*, NSNumber*, UIButton*, and etc, because memory managed accessors are created for free. When you create a BOOL, the value is always allocated on the stack and does not require any special accessors to prevent memory leakage. isWorking is simply the popular way of expressing the state of a boolean value.

In another OO language you would make a variable private bool working; and two accessors: SetWorking for the setter and IsWorking for the accessor.

WordPress - Check if user is logged in

get_current_user_id() will return the current user id (an integer), or will return 0 if the user is not logged in.

if (get_current_user_id()) {
   // display navbar here
}

More details here get_current_user_id().

Best way to replace multiple characters in a string?

>>> string="abc&def#ghi"
>>> for ch in ['&','#']:
...   if ch in string:
...      string=string.replace(ch,"\\"+ch)
...
>>> print string
abc\&def\#ghi

How to get current timestamp in string format in Java? "yyyy.MM.dd.HH.mm.ss"

You can use the following

new java.sql.Timestamp(System.currentTimeMillis()).getTime()

Result : 1539594988651

Hope this will help. Just my suggestion and not for reward points.

How to increment a number by 2 in a PHP For Loop

<?php
  for ($n = 0; $n <= 7; $n++) {
    echo '<p>'.($n + 1).'</p>';
    echo '<p>'.($n * 2 + 1).'</p>';
  }
?>

First paragraph:

1, 2, 3, 4, 5, 6, 7, 8

Second paragraph:

1, 3, 5, 7, 9, 11, 13, 15

How do I read input character-by-character in Java?

Use Reader.read(). A return value of -1 means end of stream; else, cast to char.

This code reads character data from a list of file arguments:

public class CharacterHandler {
    //Java 7 source level
    public static void main(String[] args) throws IOException {
        // replace this with a known encoding if possible
        Charset encoding = Charset.defaultCharset();
        for (String filename : args) {
            File file = new File(filename);
            handleFile(file, encoding);
        }
    }

    private static void handleFile(File file, Charset encoding)
            throws IOException {
        try (InputStream in = new FileInputStream(file);
             Reader reader = new InputStreamReader(in, encoding);
             // buffer for efficiency
             Reader buffer = new BufferedReader(reader)) {
            handleCharacters(buffer);
        }
    }

    private static void handleCharacters(Reader reader)
            throws IOException {
        int r;
        while ((r = reader.read()) != -1) {
            char ch = (char) r;
            System.out.println("Do something with " + ch);
        }
    }
}

The bad thing about the above code is that it uses the system's default character set. Wherever possible, prefer a known encoding (ideally, a Unicode encoding if you have a choice). See the Charset class for more. (If you feel masochistic, you can read this guide to character encoding.)

(One thing you might want to look out for are supplementary Unicode characters - those that require two char values to store. See the Character class for more details; this is an edge case that probably won't apply to homework.)

How to write a confusion matrix in Python?

If you don't want scikit-learn to do the work for you...

    import numpy
    actual = numpy.array(actual)
    predicted = numpy.array(predicted)

    # calculate the confusion matrix; labels is numpy array of classification labels
    cm = numpy.zeros((len(labels), len(labels)))
    for a, p in zip(actual, predicted):
        cm[a][p] += 1

    # also get the accuracy easily with numpy
    accuracy = (actual == predicted).sum() / float(len(actual))

Or take a look at a more complete implementation here in NLTK.

How can I format decimal property to currency?

You can create an extension method. I find this to be a good practice as you may need to lock down a currency display regardless of the browser setting. For instance you may want to display $5,000.00 always instead of 5 000,00 $ (#CanadaProblems)

public static class DecimalExtensions
{
    public static string ToCurrency(this decimal decimalValue)
    {
        return $"{decimalValue:C}";
    }
}

How can I create a border around an Android LinearLayout?

Don't want to create a drawable resource?

  <FrameLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@android:color/black"
    android:minHeight="128dp">

    <FrameLayout
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:layout_margin="1dp"
      android:background="@android:color/white">

      <TextView ... />
    </FrameLayout>
  </FrameLayout>

The equivalent of wrap_content and match_parent in flutter?

The short answer is that the parent doesn't have a size until the child has a size.

The way layout works in Flutter is that each widget provides constraints to each of its children, like "you can be up to this wide, you must be this tall, you have to be at least this wide", or whatever (specifically, they get a minimum width, a maximum width, a minimum height, and a maximum height). Each child takes those constraints, does something, and picks a size (width and height) that matches those constraints. Then, once each child has done its thing, the widget can can pick its own size.

Some widgets try to be as big as the parent allows. Some widgets try to be as small as the parent allows. Some widgets try to match a certain "natural" size (e.g. text, images).

Some widgets tell their children they can be any size they want. Some give their children the same constraints that they got from their parent.

Android 8.0: java.lang.IllegalStateException: Not allowed to start service Intent

Due to controversial votes on this answer (+4/-4 as of this edit), PLEASE LOOK AT THE OTHER ANSWERS FIRST AND USE THIS ONLY AS A LAST RESORT. I only used this once for a networking app that runs as root and I agree with the general opinion that this solution should not be used under normal circumstances.

Original answer below:

The other answers are all correct, but I'd like to point out that another way to get around this is to ask user to disable battery optimizations for your app (this isn't usually a good idea unless your app is system related). See this answer for how to request to opt out of battery optimizations without getting your app banned in Google Play.

You should also check whether battery optimizations are turned off in your receiver to prevent crashes via:

if (Build.VERSION.SDK_INT < 26 || getSystemService<PowerManager>()
        ?.isIgnoringBatteryOptimizations(packageName) != false) {
    startService(Intent(context, MyService::class.java))
} // else calling startService will result in crash

How to detect if JavaScript is disabled?

I've figured out another approach using css and javascript itself.
This is just to start tinkering with classes and ids.

The CSS snippet:
1. Create a css ID rule, and name it #jsDis.
2. Use the "content" property to generate a text after the BODY element. (You can style this as you wish).
3 Create a 2nd css ID rule and name it #jsEn, and stylize it. (for the sake of simplicity, I gave to my #jsEn rule a different background color.

<style>
#jsDis:after {
    content:"Javascript is Disable. Please turn it ON!";
    font:bold 11px Verdana;
    color:#FF0000;
}

#jsEn {
    background-color:#dedede;
}

#jsEn:after {
    content:"Javascript is Enable. Well Done!";
    font:bold 11px Verdana;
    color:#333333;
}
</style>

The JavaScript snippet:
1. Create a function.
2. Grab the BODY ID with getElementById and assign it to a variable.
3. Using the JS function 'setAttribute', change the value of the ID attribute of the BODY element.

<script>
function jsOn() {
    var chgID = document.getElementById('jsDis');
    chgID.setAttribute('id', 'jsEn');
}
</script>

The HTML part.
1. Name the BODY element attribute with the ID of #jsDis.
2. Add the onLoad event with the function name. (jsOn()).

<body id="jsDis" onLoad="jsOn()">

Because of the BODY tag has been given the ID of #jsDis:
- If Javascript is enable, it will change by himself the attribute of the BODY tag.
- If Javascript is disable, it will show the css 'content:' rule text.

You can play around with a #wrapper container, or with any DIV that use JS.

Hope this helps to get the idea.

What is the difference between a .cpp file and a .h file?

The C++ build system (compiler) knows no difference, so it's all one of conventions.

The convention is that .h files are declarations, and .cpp files are definitions.

That's why .h files are #included -- we include the declarations.

Best C++ Code Formatter/Beautifier

AStyle can be customized in great detail for C++ and Java (and others too)

This is a source code formatting tool.

clang-format is a powerful command line tool bundled with the clang compiler which handles even the most obscure language constructs in a coherent way.

It can be integrated with Visual Studio, Emacs, Vim (and others) and can format just the selected lines (or with git/svn to format some diff).

It can be configured with a variety of options listed here.

When using config files (named .clang-format) styles can be per directory - the closest such file in parent directories shall be used for a particular file.

Styles can be inherited from a preset (say LLVM or Google) and can later override different options

It is used by Google and others and is production ready.

Also look at the project UniversalIndentGUI. You can experiment with several indenters using it: AStyle, Uncrustify, GreatCode, ... and select the best for you. Any of them can be run later from a command line.

Uncrustify has a lot of configurable options. You'll probably need Universal Indent GUI (in Konstantin's reply) as well to configure it.

how to run two commands in sudo?

I usually do:

sudo bash -c 'whoami; whoami'

How to Free Inode Usage?

you could see this info

for i in /var/run/*;do echo -n "$i "; find $i| wc -l;done | column -t

Equivalent of String.format in jQuery

Expanding on adamJLev's great answer above, here is the TypeScript version:

// Extending String prototype
interface String {
    format(...params: any[]): string;
}

// Variable number of params, mimicking C# params keyword
// params type is set to any so consumer can pass number
// or string, might be a better way to constraint types to
// string and number only using generic?
String.prototype.format = function (...params: any[]) {
    var s = this,
        i = params.length;

    while (i--) {
        s = s.replace(new RegExp('\\{' + i + '\\}', 'gm'), params[i]);
    }

    return s;
};

Get URL query string parameters

This code and notation is not mine. Evan K solves a multi value same name query with a custom function ;) is taken from:

http://php.net/manual/en/function.parse-str.php#76792 _{Credits go to Evan K.}

It bears mentioning that the parse_str builtin does NOT process a query string in the CGI standard way, when it comes to duplicate fields. If multiple fields of the same name exist in a query string, every other web processing language would read them into an array, but PHP silently overwrites them:

<?php
# silently fails to handle multiple values
parse_str('foo=1&foo=2&foo=3');

# the above produces:
$foo = array('foo' => '3');
?>

Instead, PHP uses a non-standards compliant practice of including brackets in fieldnames to achieve the same effect.

<?php
# bizarre php-specific behavior
parse_str('foo[]=1&foo[]=2&foo[]=3');

# the above produces:
$foo = array('foo' => array('1', '2', '3') );
?>

This can be confusing for anyone who's used to the CGI standard, so keep it in mind. As an alternative, I use a "proper" querystring parser function:

<?php
function proper_parse_str($str) {
  # result array
  $arr = array();

  # split on outer delimiter
  $pairs = explode('&', $str);

  # loop through each pair
  foreach ($pairs as $i) {
    # split into name and value
    list($name,$value) = explode('=', $i, 2);
    
    # if name already exists
    if( isset($arr[$name]) ) {
      # stick multiple values into an array
      if( is_array($arr[$name]) ) {
        $arr[$name][] = $value;
      }
      else {
        $arr[$name] = array($arr[$name], $value);
      }
    }
    # otherwise, simply stick it in a scalar
    else {
      $arr[$name] = $value;
    }
  }

  # return result array
  return $arr;
}

$query = proper_parse_str($_SERVER['QUERY_STRING']);
?>

How do I pass JavaScript variables to PHP?

Here is the Working example: Get javascript variable value on the same page in php.

<script>
var p1 = "success";
</script>

<?php
echo "<script>document.writeln(p1);</script>";
?>

Python 101: Can't open file: No such file or directory

Try uninstalling Python and then install it again, but this time make sure that the option Add Python to Path is marked as checked during the installation process.

Check if a string contains a string in C++

If you don't want to use standard library functions, below is one solution.

#include <iostream>
#include <string>

bool CheckSubstring(std::string firstString, std::string secondString){
    if(secondString.size() > firstString.size())
        return false;

    for (int i = 0; i < firstString.size(); i++){
        int j = 0;
        // If the first characters match
        if(firstString[i] == secondString[j]){
            int k = i;
            while (firstString[i] == secondString[j] && j < secondString.size()){
                j++;
                i++;
            }
            if (j == secondString.size())
                return true;
            else // Re-initialize i to its original value
                i = k;
        }
    }
    return false;
}

int main(){
    std::string firstString, secondString;

    std::cout << "Enter first string:";
    std::getline(std::cin, firstString);

    std::cout << "Enter second string:";
    std::getline(std::cin, secondString);

    if(CheckSubstring(firstString, secondString))
        std::cout << "Second string is a substring of the frist string.\n";
    else
        std::cout << "Second string is not a substring of the first string.\n";

    return 0;
}

Creation timestamp and last update timestamp with Hibernate and MySQL

Taking the resources in this post along with information taken left and right from different sources, I came with this elegant solution, create the following abstract class

import java.util.Date;

import javax.persistence.Column;
import javax.persistence.MappedSuperclass;
import javax.persistence.PrePersist;
import javax.persistence.PreUpdate;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;

@MappedSuperclass
public abstract class AbstractTimestampEntity {

    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "created", nullable = false)
    private Date created;

    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "updated", nullable = false)
    private Date updated;

    @PrePersist
    protected void onCreate() {
    updated = created = new Date();
    }

    @PreUpdate
    protected void onUpdate() {
    updated = new Date();
    }
}

and have all your entities extend it, for instance:

@Entity
@Table(name = "campaign")
public class Campaign extends AbstractTimestampEntity implements Serializable {
...
}

Is it possible to see more than 65536 rows in Excel 2007?

Yes, the new limit is approximately 1 million rows.

http://blogs.msdn.com/excel/archive/2005/09/26/474258.aspx

All inclusive Charset to avoid "java.nio.charset.MalformedInputException: Input length = 1"?

Creating BufferedReader from Files.newBufferedReader

Files.newBufferedReader(Paths.get("a.txt"), StandardCharsets.UTF_8);

when running the application it may throw the following exception:

java.nio.charset.MalformedInputException: Input length = 1

But

new BufferedReader(new InputStreamReader(new FileInputStream("a.txt"),"utf-8"));

works well.

The different is that, the former uses CharsetDecoder default action.

The default action for malformed-input and unmappable-character errors is to report them.

while the latter uses the REPLACE action.

cs.newDecoder().onMalformedInput(CodingErrorAction.REPLACE).onUnmappableCharacter(CodingErrorAction.REPLACE)

DataGridView checkbox column - value and functionality

Here's a one liner answer for this question

List<DataGridViewRow> list = DataGridView1.Rows.Cast<DataGridViewRow>().Where(k => Convert.ToBoolean(k.Cells[CheckBoxColumn1.Name].Value) == true).ToList();

How do I create a readable diff of two spreadsheets using git diff?

Do you use TortoiseSVN for doing your commits and updates in subversion? It has a diff tool, however comparing Excel files is still not really user friendly. In my environment (Win XP, Office 2007), it opens up two excel files for side by side comparison.

Right click document > Tortoise SVN > Show Log > select revision > right click for "Compare with working copy".

How to get RegistrationID using GCM in android

In response to your first question: Yes, you have to run a server app to send the messages, as well as a client app to receive them.

In response to your second question: Yes, every application needs its own API key. This key is for your server app, not the client.

Python memory leaks

You should specially have a look on your global or static data (long living data).

When this data grows without restriction, you can also get troubles in Python.

The garbage collector can only collect data, that is not referenced any more. But your static data can hookup data elements that should be freed.

Another problem can be memory cycles, but at least in theory the Garbage collector should find and eliminate cycles -- at least as long as they are not hooked on some long living data.

What kinds of long living data are specially troublesome? Have a good look on any lists and dictionaries -- they can grow without any limit. In dictionaries you might even don't see the trouble coming since when you access dicts, the number of keys in the dictionary might not be of big visibility to you ...

How to access iOS simulator camera

Simulator doesn't have a Camera. If you want to access a camera you need a device. You can't test camera on simulator. You can only check the photo and video gallery.

Grant execute permission for a user on all stored procedures in database?

use below code , change proper database name and user name and then take that output and execute in SSMS. FOR SQL 2005 ABOVE

USE <database_name> 
select 'GRANT EXECUTE ON ['+name+'] TO [userName]  '  
from sys.objects  
where type ='P' 
and is_ms_shipped = 0

How do I get cURL to not show the progress bar?

In curl version 7.22.0 on Ubuntu and 7.24.0 on OSX the solution to not show progress but to show errors is to use both -s (--silent) and -S (--show-error) like so:

curl -sS http://google.com > temp.html

This works for both redirected output > /some/file, piped output | less and outputting directly to the terminal for me.

Update: Since curl 7.67.0 there is a new option --no-progress-meter which does precisely this and nothing else, see clonejo's answer for more details.

How to reload/refresh jQuery dataTable?

This simple answer worked for me

                  $('#my-datatable').DataTable().ajax.reload();

ref https://datatables.net/forums/discussion/38969/reload-refresh-table-after-event

Start index for iterating Python list

Why are people using list slicing (slow because it copies to a new list), importing a library function, or trying to rotate an array for this?

Use a normal for-loop with range(start, stop, step) (where start and step are optional arguments).

For example, looping through an array starting at index 1:

for i in range(1, len(arr)):
    print(arr[i])

How to trigger an event after using event.preventDefault()

The approach I use is this:

$('a').on('click', function(event){
    if (yourCondition === true) { //Put here the condition you want
        event.preventDefault(); // Here triggering stops
        // Here you can put code relevant when event stops;
        return;
    }
    // Here your event works as expected and continue triggering
    // Here you can put code you want before triggering
});

Inline Form nested within Horizontal Form in Bootstrap 3

This Bootply example seems like a much better option. Only thing is that the labels are a little too high so I added padding-top:5px to center them with my inputs.

<div class="container">
<h2>Bootstrap Mixed Form <p class="lead">with horizontal and inline fields</p></h2>
<form role="form" class="form-horizontal">
    <div class="form-group">
        <label class="col-sm-1" for="inputEmail1">Email</label>
        <div class="col-sm-5"><input type="email" class="form-control" id="inputEmail1" placeholder="Email"></div>
    </div>
    <div class="form-group">
        <label class="col-sm-1" for="inputPassword1">Password</label>
        <div class="col-sm-5"><input type="password" class="form-control" id="inputPassword1" placeholder="Password"></div>
    </div>
    <div class="form-group">
        <label class="col-sm-12" for="TextArea">Textarea</label>
        <div class="col-sm-6"><textarea class="form-control" id="TextArea"></textarea></div>
    </div>
    <div class="form-group">
        <div class="col-sm-3"><label>First name</label><input type="text" class="form-control" placeholder="First"></div>
        <div class="col-sm-3"><label>Last name</label><input type="text" class="form-control" placeholder="Last"></div>
    </div>
    <div class="form-group">
        <label class="col-sm-12">Phone number</label>
        <div class="col-sm-1"><input type="text" class="form-control" placeholder="000"><div class="help">area</div></div>
        <div class="col-sm-1"><input type="text" class="form-control" placeholder="000"><div class="help">local</div></div>
        <div class="col-sm-2"><input type="text" class="form-control" placeholder="1111"><div class="help">number</div></div>
        <div class="col-sm-2"><input type="text" class="form-control" placeholder="123"><div class="help">ext</div></div>
    </div>
    <div class="form-group">
        <label class="col-sm-1">Options</label>
        <div class="col-sm-2"><input type="text" class="form-control" placeholder="Option 1"></div>
        <div class="col-sm-3"><input type="text" class="form-control" placeholder="Option 2"></div>
    </div>
    <div class="form-group">
        <div class="col-sm-6">
            <button type="submit" class="btn btn-info pull-right">Submit</button>
        </div>
    </div>
</form>
<hr>
</div>

Commenting code in Notepad++

In your n++ editor, you can go to Setting > Shortcut mapper and find all shortcut information as well as you can edit them :)

jQuery $.cookie is not a function

Check that you included the script in header and not in footer of the page. Particularly in WordPress this one didn't work:

wp_register_script('cookie', get_template_directory_uri() . '/js/jquery.cookie.js', array(), false, true);

The last parameter indicates including the script in footer and needed to be changed to false (default). The way it worked:

wp_register_script('cookie', get_template_directory_uri() . '/js/jquery.cookie.js');

SQL Server - How to lock a table until a stored procedure finishes

Use the TABLOCKX lock hint for your transaction. See this article for more information on locking.

Boolean operators && and ||

&& and || are what is called "short circuiting". That means that they will not evaluate the second operand if the first operand is enough to determine the value of the expression.

For example if the first operand to && is false then there is no point in evaluating the second operand, since it can't change the value of the expression (false && true and false && false are both false). The same goes for || when the first operand is true.

You can read more about this here: http://en.wikipedia.org/wiki/Short-circuit_evaluation From the table on that page you can see that && is equivalent to AndAlso in VB.NET, which I assume you are referring to.

How to call a JavaScript function within an HTML body

First include the file in head tag of html , then call the function in script tags under body tags e.g.

Js file function to be called

function tryMe(arg) {
    document.write(arg);
}

HTML FILE

<!DOCTYPE html>
<html>
<head>
    <script type="text/javascript" src='object.js'> </script>
    <title>abc</title><meta charset="utf-8"/>
</head>
<body>
    <script>
    tryMe('This is me vishal bhasin signing in');
    </script>
</body>
</html>

finish

How to change value of process.env.PORT in node.js?

For just one run (from the unix shell prompt):

$ PORT=1234 node app.js

More permanently:

$ export PORT=1234
$ node app.js

In Windows:

set PORT=1234

In Windows PowerShell:

$env:PORT = 1234

Creating a file name as a timestamp in a batch job

This works well with (my) German locale, should be possible to adjust it to your needs...

forfiles /p *PATH* /m *filepattern* /c "cmd /c ren @file 
%DATE:~6,4%%DATE:~3,2%%DATE:~0,2%_@file"

How do you add CSS with Javascript?

if you know at least one <style> tag exist in page , use this function :

CSS=function(i){document.getElementsByTagName('style')[0].innerHTML+=i};

usage :

CSS("div{background:#00F}");

Radio Buttons "Checked" Attribute Not Working

The ultimate JavaScript workaround to this annoying issue -

Simply wrap the jQuery command in a setTimeout. The interval can be extremely small, I use 10 milliseconds and it seems to be working great. The delay is so small that it is virtually undetectable to the end users.

setTimeout(function(){
  $("#radio-element").attr('checked','checked');
},10);

This will also work with

$("#radio-element").trigger('click');
$("#radio-element").attr('checked',true);
$("#radio-element").attr('checked',ANYTHING_THAT_IS_NOT_FALSE);

Hacky...hacky...hacky...hacky... Yes I know... hence this is a workaround....

How to access JSON decoded array in PHP

When you want to loop into a multiple dimensions array, you can use foreach like this:

foreach($data as $users){
   foreach($users as $user){
      echo $user['id'].' '.$user['c_name'].' '.$user['seat_no'].'<br/>';
   }
}

How to run eclipse in clean mode? what happens if we do so?

For Windows users: You can do as RTA said or through command line do this: Navigate to the locaiton of the eclipse executable then run:

 eclipse.lnk -clean

First check the name of your executable using the command 'dir' on its path

How to check variable type at runtime in Go language

What's wrong with

func (e *Easy)SetStringOption(option Option, param string)
func (e *Easy)SetLongOption(option Option, param long)

and so on?

Column/Vertical selection with Keyboard in SublimeText 3

The reason why the sublime documented shortcuts for Mac does not work are they are linked to the shortcuts of other Mac functionalities such as Mission Control, Application Windows, etc. Solution: Go to System Preferences -> Keyboard -> Shortcuts and then un-check the options for Mission Control and Application Windows. Now try "Control + Shift [+ Arrow keys]" for selecting the required text and then move the cursor to the required location without any mouse click, so that the selection can be pasted with the correct indentation at the required location.

ORA-01031: insufficient privileges when selecting view

Q. When is the "with grant option" required ?

A. when you have a view executed from a third schema.

Example: schema DSDSW has a view called view_name

a) that view selects from a table in another schema  (FDR.balance)
b) a third shema  X_WORK  tries to select  from that view

Typical grants: grant select on dsdw.view_name to dsdw_select_role; grant dsdw_select_role to fdr;

But: fdr gets select count(*) from dsdw.view_name; ERROR at line 1: ORA-01031: insufficient privileges

issue the grant:

grant select on fdr.balance to dsdw with grant option;

now fdr: select count(*) from dsdw.view_name; 5 rows

How to include the reference of DocumentFormat.OpenXml.dll on Mono2.10?

The issue for me was that DocumentFormat.OpenXml.dll existed in the Global Assembly Cache (GAC) on my Win7 development box. So when publishing my project in VS2013, it found the file in the GAC and therefore omitted it from being copied to the publish folder.

Solution: remove the DLL from the GAC.

Open the GAC root in Windows Explorer (Win7: %windir%\Microsoft.NET\assembly)
Search for OpenXml
Delete any appropriate folders (or to be safe, cut them out to your desktop in case you should want to restore them)

There may be a more proper way to remove a GAC file (below), but that is what I did and it worked. gacutil –u DocumentFormat.OpenXml.dll

Hope that helps!

How to extract public key using OpenSSL?

For those interested in the details - you can see what's inside the public key file (generated as explained above), by doing this:-

openssl rsa -noout -text -inform PEM -in key.pub -pubin

or for the private key file, this:-

openssl rsa -noout -text -in key.private

which outputs as text on the console the actual components of the key (modulus, exponents, primes, ...)

In Ruby on Rails, what's the difference between DateTime, Timestamp, Time and Date?

Here is an awesome and precise explanation I found.

TIMESTAMP used to track changes of records, and update every time when the record is changed. DATETIME used to store specific and static value which is not affected by any changes in records.

TIMESTAMP also affected by different TIME ZONE related setting. DATETIME is constant.

TIMESTAMP internally converted a current time zone to UTC for storage, and during retrieval convert the back to the current time zone. DATETIME can not do this.

TIMESTAMP is 4 bytes and DATETIME is 8 bytes.

TIMESTAMP supported range: ‘1970-01-01 00:00:01' UTC to ‘2038-01-19 03:14:07' UTC DATETIME supported range: ‘1000-01-01 00:00:00' to ‘9999-12-31 23:59:59'

source: https://www.dbrnd.com/2015/09/difference-between-datetime-and-timestamp-in-mysql/#:~:text=DATETIME%20vs%20TIMESTAMP%3A,DATETIME%20is%20constant.

Also...

table with different column "date" types and corresponding rails migration types depending on the database

Programs & Examples On #Modelstate

ModelState.IsValid == false, why?

How to get all Errors from ASP.Net MVC modelState?

Asp.net MVC ModelState.Clear

ModelState.AddModelError - How can I add an error that isn't for a property?

The type is defined in an assembly that is not referenced, how to find the cause?

Removing underline with href attribute

How to change the value of attribute in appSettings section with Web.config transformation

Why this "Implicit declaration of function 'X'"?

How do I add an existing directory tree to a project in Visual Studio?

SQL multiple columns in IN clause

Create a file if one doesn't exist - C

Matplotlib subplots_adjust hspace so titles and xlabels don't overlap?

How to handle notification when app in background in Firebase

How to check if a file exists from a url

How do you query for "is not null" in Mongo?

MySQL - UPDATE query based on SELECT Query

PHP Fatal error: Cannot redeclare class

How can I send the "&" (ampersand) character via AJAX?

Two constructors

How to initialize java.util.date to empty

What is the IntelliJ shortcut key to create a javadoc comment?

How can I get double quotes into a string literal?

Android - Set text to TextView

How to delete columns in pyspark dataframe

Delete all rows in table

How do I delete unpushed git commits?

How to add an auto-incrementing primary key to an existing table, in PostgreSQL?

How to delete specific columns with VBA?

Passing an array of parameters to a stored procedure

Getting only 1 decimal place

How to validate an Email in PHP?

Class JavaLaunchHelper is implemented in both. One of the two will be used. Which one is undefined

Why does visual studio 2012 not find my tests?

Origin is not allowed by Access-Control-Allow-Origin

Avoid Adding duplicate elements to a List C#

Update UI from Thread in Android

Open mvc view in new window from controller

How can I add a username and password to Jenkins?

document.getElementById("remember").visibility = "hidden"; not working on a checkbox

cvc-elt.1: Cannot find the declaration of element 'MyElement'

IntelliJ: Error:java: error: release version 5 not supported

Oracle date "Between" Query

How to access route, post, get etc. parameters in Zend Framework 2

Is there a way to check for both `null` and `undefined`?

Remove all files except some from a directory

Get a list of URLs from a site

phpmailer - The following SMTP Error: Data not accepted

Can I nest a <button> element inside an <a> using HTML5?

Android SharedPreferences in Fragment

Histogram using gnuplot?

Convert string to binary then back again using PHP

Lightweight workflow engine for Java

"java.lang.OutOfMemoryError: PermGen space" in Maven build

How to include NA in ifelse?

MySQL: ALTER TABLE if column not exists

IntelliJ: Working on multiple projects

Why is NULL undeclared?

Python return list from function

Wait for a void async method

How to negate code in "if" statement block in JavaScript -JQuery like 'if not then..'

How to check if "Radiobutton" is checked?

Ansible: copy a directory content to another directory

jquery change style of a div on click

Undo working copy modifications of one file in Git?

pyplot scatter plot marker size

Size in points^2

Connection to "area"

What are points?

How to select element using XPATH syntax on Selenium for Python?

JavaFX Location is not set error message

Get and Set a Single Cookie with Node.js HTTP Server

How can I generate a unique ID in Python?

Converting SVG to PNG using C#

Is there an equivalent of CSS max-width that works in HTML emails?

How do I disable "missing docstring" warnings at a file-level in Pylint?

Get HTML inside iframe using jQuery

Sending command line arguments to npm script

Are there any style options for the HTML5 Date picker?

getting " (1) no such column: _id10 " error