How to configure the web.config to allow requests of any length

In my case ( Visual Studio 2012 / IIS Express / ASP.NET MVC 4 app / .Net Framework 4.5 ) what really worked after 30 minutes of trial and error was setting the maxQueryStringLength property in the <httpRuntime> tag:

<httpRuntime targetFramework="4.5" maxQueryStringLength="10240" enable="true" />

maxQueryStringLength defaults to 2048.

More about it here:

Expanding the Range of Allowable URLs

I tried setting it in <system.webServer> as @MattVarblow suggests, but it didn't work... and this is because I'm using IIS Express (based on IIS 8) on my dev machine with Windows 8.

When I deployed my app to the production environment (Windows Server 2008 R2 with IIS 7), IE 10 started returning 404 errors in AJAX requests with long query strings. Then I thought that the problem was related to the query string and tried @MattVarblow's answer. It just worked on IIS 7. :)

HTML form do some "action" when hit submit button

index.html

<!DOCTYPE html>
<html>
   <body>
       <form action="submit.php" method="POST">
         First name: <input type="text" name="firstname" /><br /><br />
         Last name: <input type="text" name="lastname" /><br />
         <input type="submit" value="Submit" />
      </form> 
   </body>
</html>

After that one more file which page you want to display after pressing the submit button

submit.php

<html>
  <body>

    Your First Name is -  <?php echo $_POST["firstname"]; ?><br>
    Your Last Name is -   <?php echo $_POST["lastname"]; ?>

  </body>
</html>

How to view the Folder and Files in GAC?

Launch the program "Run" (Windows Vista/7/8: type it in the start menu search bar) and type: C:\windows\assembly\GAC_MSIL

Then move to the parent folder (Windows Vista/7/8: by clicking on it in the explorer bar) to see all the GAC files in a normal explorer window. You can now copy, add and remove files as everywhere else.

Is there an arraylist in Javascript?

You don't even need push, you can do something like this -

var A=[10,20,30,40];

A[A.length]=50;

How to do ToString for a possibly null object?

Holstebroe's comment would be your best answer:

string s = string.Format("{0}", myObj);

If myObj is null, Format places an Empty String value there.

It also satisfies your one line requirement and is easy to read.

load iframe in bootstrap modal

I came across this implementation in Codepen. I hope you find it helpful.

this.on('hidden.bs.modal', function(){
      $(this).find('iframe').html("").attr("src", "");
    });

Google Play Services Library update and missing symbol @integer/google_play_services_version

Fixed by adding Google Play Services to my Module:app gradle build file. Documentation also says to update version when you update GMS.

dependencies {

compile 'com.google.android.gms:play-services:9.6.1'

}

How to sort mongodb with pymongo

This also works:

db.Account.find().sort('UserName', -1)
db.Account.find().sort('UserName', 1)

I'm using this in my code, please comment if i'm doing something wrong here, thanks.

Python Write bytes to file

Write bytes and Create the file if not exists:

f = open('./put/your/path/here.png', 'wb')
f.write(data)
f.close()

wb means open the file in write binary mode.

Center content in responsive bootstrap navbar

I think this is what you are looking for. You need to remove the float: left from the inner nav to center it and make it a inline-block.

.navbar .navbar-nav {
  display: inline-block;
  float: none;
  vertical-align: top;
}

.navbar .navbar-collapse {
  text-align: center;
}

http://jsfiddle.net/bdd9U/2/

Edit: if you only want this effect to happen when the nav isn't collapsed surround it in the appropriate media query.

@media (min-width: 768px) {
    .navbar .navbar-nav {
        display: inline-block;
        float: none;
        vertical-align: top;
    }

    .navbar .navbar-collapse {
        text-align: center;
    }
}

http://jsfiddle.net/bdd9U/3/

Google reCAPTCHA: How to get user response and validate in the server side?

The cool thing about the new Google Recaptcha is that the validation is now completely encapsulated in the widget. That means, that the widget will take care of asking questions, validating responses all the way till it determines that a user is actually a human, only then you get a g-recaptcha-response value.

But that does not keep your site safe from HTTP client request forgery.

Anyone with HTTP POST knowledge could put random data inside of the g-recaptcha-response form field, and foll your site to make it think that this field was provided by the google widget. So you have to validate this token.

In human speech it would be like,

Your Server: Hey Google, there's a dude that tells me that he's not a robot. He says that you already verified that he's a human, and he told me to give you this token as a proof of that.
Google: Hmm... let me check this token... yes I remember this dude I gave him this token... yeah he's made of flesh and bone let him through.
Your Server: Hey Google, there's another dude that tells me that he's a human. He also gave me a token.
Google: Hmm... it's the same token you gave me last time... I'm pretty sure this guy is trying to fool you. Tell him to get off your site.

Validating the response is really easy. Just make a GET Request to

https://www.google.com/recaptcha/api/siteverify?secret=your_secret&response=response_string&remoteip=user_ip_address

And replace the response_string with the value that you earlier got by the g-recaptcha-response field.

You will get a JSON Response with a success field.

More information here: https://developers.google.com/recaptcha/docs/verify

Edit: It's actually a POST, as per documentation here.

jQuery count number of divs with a certain class?

You can use the jquery .length property

var numItems = $('.item').length;

how to bold words within a paragraph in HTML/CSS?

<p><b> BOLD TEXT </b> not in bold </p>;

Include the text you want to be in bold between <b>...</b>

Bulk Insertion in Laravel using eloquent ORM

For category relations insertion I came across the same problem and had no idea, except that in my eloquent model I used Self() to have an instance of the same class in foreach to record multiple saves and grabing ids.

foreach($arCategories as $v)
{                
    if($v>0){
        $obj = new Self(); // this is to have new instance of own
        $obj->page_id = $page_id;
        $obj->category_id = $v;
        $obj->save();
    }
}

without "$obj = new Self()" it only saves single record (when $obj was $this)

Dynamically load JS inside JS

If you have many files with dependencies, use AMD/RequireJS. http://requirejs.org/

Comparison of Android Web Service and Networking libraries: OKHTTP, Retrofit and Volley

Looking at the Volley perspective here are some advantages for your requirement:

Volley, on one hand, is totally focused on handling individual, small HTTP requests. So if your HTTP request handling has some quirks, Volley probably has a hook for you. If, on the other hand, you have a quirk in your image handling, the only real hook you have is ImageCache. "It’s not nothing, but it’s not a lot!, either". but it has more other advantages like Once you define your requests, using them from within a fragment or activity is painless unlike parallel AsyncTasks

Pros and cons of Volley:

So what’s nice about Volley?

The networking part isn’t just for images. Volley is intended to be an integral part of your back end. For a fresh project based off of a simple REST service, this could be a big win.
NetworkImageView is more aggressive about request cleanup than Picasso, and more conservative in its GC usage patterns. NetworkImageView relies exclusively on strong memory references, and cleans up all request data as soon as a new request is made for an ImageView, or as soon as that ImageView moves offscreen.
Performance. This post won’t evaluate this claim, but they’ve clearly taken some care to be judicious in their memory usage patterns. Volley also makes an effort to batch callbacks to the main thread to reduce context switching.
Volley apparently has futures, too. Check out RequestFuture if you’re interested.
If you’re dealing with high-resolution compressed images, Volley is the only solution here that works well.
Volley can be used with Okhttp (New version of Okhttp supports NIO for better performance )
Volley plays nice with the Activity life cycle.

Problems With Volley:
Since Volley is new, few things are not supported yet, but it's fixed.

Multipart Requests (Solution: https://github.com/vinaysshenoy/enhanced-volley)
status code 201 is taken as an error, Status code from 200 to 207 are successful responses now.(Fixed: https://github.com/Vinayrraj/CustomVolley)

Update: in latest release of Google volley, the 2XX Status codes bug is fixed now!Thanks to Ficus Kirkpatrick!
it's less documented but many of the people are supporting volley in github, java like documentation can be found here. On android developer website, you may find guide for Transmitting Network Data Using Volley. And volley source code can be found at Google Git
To solve/change Redirect Policy of Volley Framework use Volley with OkHTTP (CommonsWare mentioned above)

Also you can read this Comparing Volley's image loading with Picasso

Retrofit:

It's released by Square, This offers very easy to use REST API's (Update: Voila! with NIO support)

Pros of Retrofit:

Compared to Volley, Retrofit's REST API code is brief and provides excellent API documentation and has good support in communities! It is very easy to add into the projects.
We can use it with any serialization library, with error handling.

Update: - There are plenty of very good changes in Retrofit 2.0.0-beta2

version 1.6 of Retrofit with OkHttp 2.0 is now dependent on Okio to support java.io and java.nio which makes it much easier to access, store and process your data using ByteString and Buffer to do some clever things to save CPU and memory. (FYI: This reminds me of the Koush's OIN library with NIO support!) We can use Retrofit together with RxJava to combine and chain REST calls using rxObservables to avoid ugly callback chains (to avoid callback hell!!).

Cons of Retrofit for version 1.6:

Memory related error handling functionality is not good (in older versions of Retrofit/OkHttp) not sure if it's improved with the Okio with Java NIO support.
Minimum threading assistance can result call back hell if we use this in an improper way.

(All above Cons have been solved in the new version of Retrofit 2.0 beta)

========================================================================

Update:

Android Async vs Volley vs Retrofit performance benchmarks (milliseconds, lower value is better):

Android Async vs Volley vs Retrofit performance benchmarks

(FYI above Retrofit Benchmarks info will improve with java NIO support because the new version of OKhttp is dependent on NIO Okio library)

In all three tests with varying repeats (1 – 25 times), Volley was anywhere from 50% to 75% faster. Retrofit clocked in at an impressive 50% to 90% faster than the AsyncTasks, hitting the same endpoint the same number of times. On the Dashboard test suite, this translated into loading/parsing the data several seconds faster. That is a massive real-world difference. In order to make the tests fair, the times for AsyncTasks/Volley included the JSON parsing as Retrofit does it for you automatically.

RetroFit Wins in benchmark test!

In the end, we decided to go with Retrofit for our application. Not only is it ridiculously fast, but it meshes quite well with our existing architecture. We were able to make a parent Callback Interface that automatically performs error handling, caching, and pagination with little to no effort for our APIs. In order to merge in Retrofit, we had to rename our variables to make our models GSON compliant, write a few simple interfaces, delete functions from the old API, and modify our fragments to not use AsyncTasks. Now that we have a few fragments completely converted, it’s pretty painless. There were some growing pains and issues that we had to overcome, but overall it went smoothly. In the beginning, we ran into a few technical issues/bugs, but Square has a fantastic Google+ community that was able to help us through it.

When to use Volley?!

We can use Volley when we need to load images as well as consuming REST APIs!, network call queuing system is needed for many n/w request at the same time! also Volley has better memory related error handling than Retrofit!

OkHttp can be used with Volley, Retrofit uses OkHttp by default! It has SPDY support, connection pooling, disk caching, transparent compression! Recently, it has got some support of java NIO with Okio library.

Source, credit: volley-vs-retrofit by Mr. Josh Ruesch

Note: About streaming it depends on what type of streaming you want like RTSP/RTCP.

Using JavaScript to display a Blob

If you want to use fetch instead:

var myImage = document.querySelector('img');

fetch('flowers.jpg').then(function(response) {
  return response.blob();
}).then(function(myBlob) {
  var objectURL = URL.createObjectURL(myBlob);
  myImage.src = objectURL;
});

Source:

https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch

Write in body request with HttpClient

Extending your code (assuming that the XML you want to send is in xmlString) :

String xmlString = "</xml>";
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpRequest = new HttpPost(this.url);
httpRequest.setHeader("Content-Type", "application/xml");
StringEntity xmlEntity = new StringEntity(xmlString);
httpRequest.setEntity(xmlEntity );
HttpResponse httpresponse = httpclient.execute(httppost);

Where does Hive store files in HDFS?

In sandbox , you need to go for /apps/hive/warehouse/ and normal cluster /user/hive/warehouse

How to convert milliseconds into human readable form?

Long expireTime = 69l;
Long tempParam = 0l;

Long seconds = math.mod(expireTime, 60);
tempParam = expireTime - seconds;
expireTime = tempParam/60;
Long minutes = math.mod(expireTime, 60);
tempParam = expireTime - minutes;
expireTime = expireTime/60;
Long hours = math.mod(expireTime, 24);
tempParam = expireTime - hours;
expireTime = expireTime/24;
Long days = math.mod(expireTime, 30);

system.debug(days + '.' + hours + ':' + minutes + ':' + seconds);

This should print: 0.0:1:9

How does one use glide to download an image into a bitmap?

It looks like overriding the Target class or one of the implementations like BitmapImageViewTarget and overriding the setResource method to capture the bitmap might be the way to go...

This is untested. :-)

    Glide.with(context)
         .load("http://goo.gl/h8qOq7")
         .asBitmap()
         .into(new BitmapImageViewTarget(imageView) {
                     @Override
                     protected void setResource(Bitmap resource) {
                         // Do bitmap magic here
                         super.setResource(resource);
                     }
         });

Sending arrays with Intent.putExtra

final static String EXTRA_MESSAGE = "edit.list.message";

Context context;
public void onClick (View view)
{   
    Intent intent = new Intent(this,display.class);
    RelativeLayout relativeLayout = (RelativeLayout) view.getParent();

    TextView textView = (TextView) relativeLayout.findViewById(R.id.textView1);
    String message = textView.getText().toString();

    intent.putExtra(EXTRA_MESSAGE,message);
    startActivity(intent);
}

ld cannot find an existing library

The problem is the linker is looking for libmagic.so but you only have libmagic.so.1

A quick hack is to symlink libmagic.so.1 to libmagic.so

Modify the legend of pandas bar plot

If you need to call plot multiply times, you can also use the "label" argument:

ax = df1.plot(label='df1', y='y_var')
ax = df2.plot(label='df2', y='y_var')

While this is not the case in the OP question, this can be helpful if the DataFrame is in long format and you use groupby before plotting.

Calling ASP.NET MVC Action Methods from JavaScript

Use jQuery ajax:

function AddToCart(id)
{
   $.ajax({
      url: 'urlToController',
      data: { id: id }
   }).done(function() {
      alert('Added'); 
   });
}

http://api.jquery.com/jQuery.ajax/

Why is sed not recognizing \t as a tab?

@sedit was on the right path, but it's a bit awkward to define a variable.

Solution (bash specific)

The way to do this in bash is to put a dollar sign in front of your single quoted string.

$ echo -e '1\n2\n3'
1
2
3

$ echo -e '1\n2\n3' | sed 's/.*/\t&/g'
t1
t2
t3

$ echo -e '1\n2\n3' | sed $'s/.*/\t&/g'
    1
    2
    3

If your string needs to include variable expansion, you can put quoted strings together like so:

$ timestamp=$(date +%s)
$ echo -e '1\n2\n3' | sed "s/.*/$timestamp"$'\t&/g'
1491237958  1
1491237958  2
1491237958  3

Explanation

In bash $'string' causes "ANSI-C expansion". And that is what most of us expect when we use things like \t, \r, \n, etc. From: https://www.gnu.org/software/bash/manual/html_node/ANSI_002dC-Quoting.html#ANSI_002dC-Quoting

Words of the form $'string' are treated specially. The word expands to string, with backslash-escaped characters replaced as specified by the ANSI C standard. Backslash escape sequences, if present, are decoded...

The expanded result is single-quoted, as if the dollar sign had not been present.

Solution (if you must avoid bash)

I personally think most efforts to avoid bash are silly because avoiding bashisms does NOT* make your code portable. (Your code will be less brittle if you shebang it to bash -eu than if you try to avoid bash and use sh [unless you are an absolute POSIX ninja].) But rather than have a religious argument about that, I'll just give you the BEST* answer.

$ echo -e '1\n2\n3' | sed "s/.*/$(printf '\t')&/g"
    1
    2
    3

* BEST answer? Yes, because one example of what most anti-bash shell scripters would do wrong in their code is use echo '\t' as in @robrecord's answer. That will work for GNU echo, but not BSD echo. That is explained by The Open Group at http://pubs.opengroup.org/onlinepubs/9699919799/utilities/echo.html#tag_20_37_16 And this is an example of why trying to avoid bashisms usually fail.

Generating Request/Response XML from a WSDL

Try this online tool: https://www.wsdl-analyzer.com. It appears to be free and does a lot more than just generate XML for requests and response.

There is also this: https://www.oxygenxml.com/xml_editor/wsdl_soap_analyzer.html, which can be downloaded, but not free.

jQuery checkbox event handling

$('#myform :checkbox').change(function() {
    // this will contain a reference to the checkbox   
    if (this.checked) {
        // the checkbox is now checked 
    } else {
        // the checkbox is now no longer checked
    }
});

Typescript: React event types

To combine both Nitzan's and Edwin's answers, I found that something like this works for me:

update = (e: React.FormEvent<EventTarget>): void => {
    let target = e.target as HTMLInputElement;
    this.props.login[target.name] = target.value;
}

grep using a character vector with multiple patterns

Based on Brian Digg's post, here are two helpful functions for filtering lists:

#Returns all items in a list that are not contained in toMatch
#toMatch can be a single item or a list of items
exclude <- function (theList, toMatch){
  return(setdiff(theList,include(theList,toMatch)))
}

#Returns all items in a list that ARE contained in toMatch
#toMatch can be a single item or a list of items
include <- function (theList, toMatch){
  matches <- unique (grep(paste(toMatch,collapse="|"), 
                          theList, value=TRUE))
  return(matches)
}

Change the class from factor to numeric of many columns in a data frame

Here are some dplyr options:

# by column type:
df %>% 
  mutate_if(is.factor, ~as.numeric(as.character(.)))

# by specific columns:
df %>% 
  mutate_at(vars(x, y, z), ~as.numeric(as.character(.))) 

# all columns:
df %>% 
  mutate_all(~as.numeric(as.character(.)))

How can I tell when a MySQL table was last updated?

Cache the query in a global variable when it is not available.

Create a webpage to force the cache to be reloaded when you update it.

Add a call to the reloading page into your deployment scripts.

C#: Waiting for all threads to complete

With .NET 4.0 I find System.Threading.Tasks a lot easier to work with. Here's spin-wait loop which works reliably for me. It blocks the main thread until all the tasks complete. There's also Task.WaitAll, but that hasn't always worked for me.

        for (int i = 0; i < N; i++)
        {
            tasks[i] = Task.Factory.StartNew(() =>
            {               
                 DoThreadStuff(localData);
            });
        }
        while (tasks.Any(t => !t.IsCompleted)) { } //spin wait

Where to put Gradle configuration (i.e. credentials) that should not be committed?

~/.gradle/gradle.properties:

mavenUser=admin
mavenPassword=admin123

build.gradle:

...
authentication(userName: mavenUser, password: mavenPassword)

How to force view controller orientation in iOS 8?

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    [UIViewController attemptRotationToDeviceOrientation];
}

Check existence of directory and create if doesn't exist

Here's the simple check, and creates the dir if doesn't exists:

## Provide the dir name(i.e sub dir) that you want to create under main dir:
output_dir <- file.path(main_dir, sub_dir)

if (!dir.exists(output_dir)){
dir.create(output_dir)
} else {
    print("Dir already exists!")
}

No newline at end of file

Your original file probably had no newline character.

However, some editors like gedit in linux silently adds newline at end of file. You cannot get rid of this message while using this kind of editors.

What I tried to overcome this issue is to open file with visual studio code editor

This editor clearly shows the last line and you can delete the line as you wish.

How to get all the AD groups for a particular user?

I would like to say that Microsoft LDAP has some special ways to search recursively for all of memberships of a user.

The Matching Rule you can specify for the "member" attribute. In particular, using the Microsoft Exclusive LDAP_MATCHING_RULE_IN_CHAIN rule for "member" attribute allows recursive/nested membership searching. The rule is used when you add it after the member attribute. Ex. (member:1.2.840.113556.1.4.1941:= XXXXX )
For the same Domain as the Account, The filter can use <SID=S-1-5-21-XXXXXXXXXXXXXXXXXXXXXXX> instead of an Accounts DistinguishedName attribute which is very handy to use cross domain if needed. HOWEVER it appears you need to use the ForeignSecurityPrincipal <GUID=YYYY> as it will not resolve your SID as it appears the <SID=> tag does not consider ForeignSecurityPrincipal object type. You can use the ForeignSecurityPrincipal DistinguishedName as well.

Using this knowledge, you can LDAP query those hard to get memberships, such as the "Domain Local" groups an Account is a member of but unless you looked at the members of the group, you wouldn't know if user was a member.

//Get Direct+Indirect Memberships of User (where SID is XXXXXX)

string str = "(& (objectCategory=group)(member:1.2.840.113556.1.4.1941:=<SID=XXXXXX>) )";

//Get Direct+Indirect **Domain Local** Memberships of User (where SID is XXXXXX)

string str2 = "(& (objectCategory=group)(|(groupType=-2147483644)(groupType=4))(member:1.2.840.113556.1.4.1941:=<SID=XXXXXX>) )";

//TAA DAA

Feel free to try these LDAP queries after substituting the SID of a user you want to retrieve all group memberships of. I figure this is similiar if not the same query as what the PowerShell Command Get-ADPrincipalGroupMembership uses behind the scenes. The command states "If you want to search for local groups in another domain, use the ResourceContextServer parameter to specify the alternate server in the other domain."

If you are familiar enough with C# and Active Directory, you should know how to perform an LDAP search using the LDAP queries provided.

Additional Documentation:

Array.size() vs Array.length

The property 'length' returns the (last_key + 1) for arrays with numeric keys:

var  nums  =  new  Array ();
nums [ 10 ]  =  10 ; 
nums [ 11 ]  =  11 ;
log.info( nums.length );

will print 12!

This will work:

var  nums  =  new  Array ();
nums [ 10 ]  =  10 ; 
nums [ 11 ]  =  11 ;
nums [ 12 ]  =  12 ;
log.info( nums.length + '  /  '+ Object.keys(nums).length );

Remove grid, background color, and top and right borders from ggplot2

The above options do not work for maps created with sf and geom_sf(). Hence, I want to add the relevant ndiscr parameter here. This will create a nice clean map showing only the features.

library(sf)
library(ggplot2)

ggplot() + 
  geom_sf(data = some_shp) + 
  theme_minimal() +                     # white background
  theme(axis.text = element_blank(),    # remove geographic coordinates
        axis.ticks = element_blank()) + # remove ticks
  coord_sf(ndiscr = 0)                  # remove grid in the background

How can I exclude one word with grep?

You can do it using -v (for --invert-match) option of grep as:

grep -v "unwanted_word" file | grep XXXXXXXX

grep -v "unwanted_word" file will filter the lines that have the unwanted_word and grep XXXXXXXX will list only lines with pattern XXXXXXXX.

EDIT:

From your comment it looks like you want to list all lines without the unwanted_word. In that case all you need is:

grep -v 'unwanted_word' file

python and sys.argv

In Python, you can't just embed arbitrary Python expressions into literal strings and have it substitute the value of the string. You need to either:

sys.stderr.write("Usage: " + sys.argv[0])

sys.stderr.write("Usage: %s" % sys.argv[0])

Also, you may want to consider using the following syntax of print (for Python earlier than 3.x):

print >>sys.stderr, "Usage:", sys.argv[0]

Using print arguably makes the code easier to read. Python automatically adds a space between arguments to the print statement, so there will be one space after the colon in the above example.

In Python 3.x, you would use the print function:

print("Usage:", sys.argv[0], file=sys.stderr)

Finally, in Python 2.6 and later you can use .format:

print >>sys.stderr, "Usage: {0}".format(sys.argv[0])

Android Crop Center of Bitmap

Here a more complete snippet that crops out the center of an [bitmap] of arbitrary dimensions and scales the result to your desired [IMAGE_SIZE]. So you will always get a [croppedBitmap] scaled square of the image center with a fixed size. ideal for thumbnailing and such.

Its a more complete combination of the other solutions.

final int IMAGE_SIZE = 255;
boolean landscape = bitmap.getWidth() > bitmap.getHeight();

float scale_factor;
if (landscape) scale_factor = (float)IMAGE_SIZE / bitmap.getHeight();
else scale_factor = (float)IMAGE_SIZE / bitmap.getWidth();
Matrix matrix = new Matrix();
matrix.postScale(scale_factor, scale_factor);

Bitmap croppedBitmap;
if (landscape){
    int start = (tempBitmap.getWidth() - tempBitmap.getHeight()) / 2;
    croppedBitmap = Bitmap.createBitmap(tempBitmap, start, 0, tempBitmap.getHeight(), tempBitmap.getHeight(), matrix, true);
} else {
    int start = (tempBitmap.getHeight() - tempBitmap.getWidth()) / 2;
    croppedBitmap = Bitmap.createBitmap(tempBitmap, 0, start, tempBitmap.getWidth(), tempBitmap.getWidth(), matrix, true);
}

Create list of single item repeated N times

[e] * n

should work

How to open child forms positioned within MDI parent in VB.NET?

   Private Sub FileMenu_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) handles FileMenu.Click

    Form1.MdiParent = Me
    Form1.Dock = DockStyle.Fill
    Form1.Show()
End Sub

Working copy XXX locked and cleanup failed in SVN

I had a file in my root directory that was messing it up. (No lock files, svn cleanup failed, etc.) My whole checkout is > 2GB with slow network speeds, so checking everything out again wasn't a great option for me.

What worked for me:

Reverted & reverted change in the messed up working copy (#1).
Checked out another copy of the repo (#2) with --depth empty
Added and committed the file in the new working copy (#2).
Updated in the original working copy (#1).

Seemed to be back to normal for me.

Get index of array element faster than O(n)

If your array has a natural order use binary search.

Use binary search.

Binary search has O(log n) access time.

Here are the steps on how to use binary search,

What is the ordering of you array? For example, is it sorted by name?
Use bsearch to find elements or indices

Code example

# assume array is sorted by name!

array.bsearch { |each| "Jamie" <=> each.name } # returns element
(0..array.size).bsearch { |n| "Jamie" <=> array[n].name } # returns index

Converting bytes to megabytes

The answer is that #1 is technically correct based on the real meaning of the Mega prefix, however (and in life there is always a however) the math for that doesn't come out so nice in base 2, which is how computers count, so #2 is what people really use.

Hide Text with CSS, Best Practice?

What Google(search bot) needs is same content should be served to bot as it is served to user. Indenting text away (any text) gets bot to think it is a spam or you are serving different content to user and bot.

The best method is to directly use logo as an image inside your anchor tag. Give an 'alt' to your image. This will be perfect for bot to read & also will help in image searching.

This is straight from the horse's mouth: http://www.youtube.com/watch?v=fBLvn_WkDJ4

HTML Table cell background image alignment

use like this your inline css

<td width="178" rowspan="3" valign="top" 
align="right" background="images/left.jpg" 
style="background-repeat:background-position: right top;">
</td>

How to get the EXIF data from a file using C#

The command line tool ExifTool by Phil Harvey works with dozens of images formats - including plenty of proprietary RAW formats - and can manipulate a variety of metadata formats including EXIF, GPS, IPTC, XMP, JFIF.

Very easy to use, lightweight, impressive application.

How to display and hide a div with CSS?

You need

.abc,.ab {
    display: none;
}

#f:hover ~ .ab {
    display: block;
}

#s:hover ~ .abc {
    display: block;
}

#s:hover ~ .a,
#f:hover ~ .a{
    display: none;
}

Updated demo at http://jsfiddle.net/gaby/n5fzB/2/

The problem in your original CSS was that the , in css selectors starts a completely new selector. it is not combined.. so #f:hover ~ .abc,.a means #f:hover ~ .abc and .a. You set that to display:none so it was always set to be hidden for all .a elements.

Default value of function parameter

In C++ the requirements imposed on default arguments with regard to their location in parameter list are as follows:

Default argument for a given parameter has to be specified no more than once. Specifying it more than once (even with the same default value) is illegal.
Parameters with default arguments have to form a contiguous group at the end of the parameter list.

Now, keeping that in mind, in C++ you are allowed to "grow" the set of parameters that have default arguments from one declaration of the function to the next, as long as the above requirements are continuously satisfied.

For example, you can declare a function with no default arguments

void foo(int a, int b);

In order to call that function after such declaration you'll have to specify both arguments explicitly.

Later (further down) in the same translation unit, you can re-declare it again, but this time with one default argument

void foo(int a, int b = 5);

and from this point on you can call it with just one explicit argument.

Further down you can re-declare it yet again adding one more default argument

void foo(int a = 1, int b);

and from this point on you can call it with no explicit arguments.

The full example might look as follows

void foo(int a, int b);

int main()
{
  foo(2, 3);

  void foo(int a, int b = 5); // redeclare
  foo(8); // OK, calls `foo(8, 5)`

  void foo(int a = 1, int b); // redeclare again
  foo(); // OK, calls `foo(1, 5)`
}

void foo(int a, int b)
{
  // ...
}

As for the code in your question, both variants are perfectly valid, but they mean different things. The first variant declares a default argument for the second parameter right away. The second variant initially declares your function with no default arguments and then adds one for the second parameter.

The net effect of both of your declarations (i.e. the way it is seen by the code that follows the second declaration) is exactly the same: the function has default argument for its second parameter. However, if you manage to squeeze some code between the first and the second declarations, these two variants will behave differently. In the second variant the function has no default arguments between the declarations, so you'll have to specify both arguments explicitly.

How to select the first element with a specific attribute using XPath

Use:

(/bookstore/book[@location='US'])[1]

This will first get the book elements with the location attribute equal to 'US'. Then it will select the first node from that set. Note the use of parentheses, which are required by some implementations.

Note, this is not the same as /bookstore/book[1][@location='US'] unless the first element also happens to have that location attribute.

In Python, what does dict.pop(a,b) mean?

def func(*args): 
    pass

When you define a function this way, *args will be array of arguments passed to the function. This allows your function to work without knowing ahead of time how many arguments are going to be passed to it.

You do this with keyword arguments too, using **kwargs:

def func2(**kwargs): 
    pass

See: Arbitrary argument lists

In your case, you've defined a class which is acting like a dictionary. The dict.pop method is defined as pop(key[, default]).

Your method doesn't use the default parameter. But, by defining your method with *args and passing *args to dict.pop(), you are allowing the caller to use the default parameter.

In other words, you should be able to use your class's pop method like dict.pop:

my_a = a()
value1 = my_a.pop('key1')       # throw an exception if key1 isn't in the dict
value2 = my_a.pop('key2', None) # return None if key2 isn't in the dict

How to output HTML from JSP <%! ... %> block?

You can do something like this:

<%!
String myMethod(String input) {
    return "test " + input;
}
%>

<%= myMethod("1 2 3") %>

This will output test 1 2 3 to the page.

How do I import material design library to Android Studio?

The latest as of release of API 23 is

compile 'com.android.support:design:23.2.1'

Powershell Execute remote exe with command line arguments on remote computer

Are you trying to pass the command line arguments to the program AS you launch it? I am working on something right now that does exactly this, and it was a lot simpler than I thought. If I go into the command line, and type

C:\folder\app.exe/xC:\folder\file.txt

then my application launches, and creates a file in the specified directory with the specified name.

I wanted to do this through a Powershell script on a remote machine, and figured out that all I needed to do was put

$s = New-PSSession -computername NAME -credential LOGIN
    Invoke-Command -session $s -scriptblock {C:\folder\app.exe /xC:\folder\file.txt}
Remove-PSSession $s

(I have a bunch more similar commands inside the session, this is just the minimum it requires to run) notice the space between the executable, and the command line arguments. It works for me, but I am not sure exactly how your application works, or if that is even how you pass arguments to it.

*I can also have my application push the file back to my own local computer by changing the script-block to

C:\folder\app.exe /x"\\LocalPC\DATA (C)\localfolder\localfile.txt"

You need the quotes if your file-path has a space in it.

EDIT: actually, this brought up some silly problems with Powershell launching the application as a service or something, so I did some searching, and figured out that you can call CMD to execute commands for you on the remote computer. This way, the command is carried out EXACTLY as if you had just typed it into a CMD window on the remote machine. Put the command in the scriptblock into double quotes, and then put a cmd.exe /C before it. like this:

cmd.exe /C "C:\folder\app.exe/xC:\folder\file.txt"

this solved all of the problems that I have been having recently.

EDIT EDIT: Had more problems, and found a much better way to do it.

start-process -filepath C:\folder\app.exe -argumentlist "/xC:\folder\file.txt"

and this doesn't hang up your terminal window waiting for the remote process to end. Just make sure you have a way to terminate the process if it doesn't do that on it's own. (mine doesn't, required the coding of another argument)

Can't access object property, even though it shows up in a console log

I've had similar issue, hope the following solution helps someone.
You can use setTimeout function as some guys here suggesting, but you never know how exactly long does your browser need to get your object defined.

Out of that I'd suggest using setInterval function instead. It will wait until your object config.col_id_3 gets defined and then fire your next code part that requires your specific object properties.

window.addEventListener('load', function(){

    var fileInterval = setInterval(function() {
        if (typeof config.col_id_3 !== 'undefined') {

            // do your stuff here

            clearInterval(fileInterval); // clear interval
        }
    }, 100); // check every 100ms

});

How can I get the application's path in a .NET console application?

I have used

System.AppDomain.CurrentDomain.BaseDirectory

when I want to find a path relative to an applications folder. This works for both ASP.Net and winform applications. It also does not require any reference to System.Web assemblies.

Getting path relative to the current working directory?

public string MakeRelativePath(string workingDirectory, string fullPath)
{
    string result = string.Empty;
    int offset;

    // this is the easy case.  The file is inside of the working directory.
    if( fullPath.StartsWith(workingDirectory) )
    {
        return fullPath.Substring(workingDirectory.Length + 1);
    }

    // the hard case has to back out of the working directory
    string[] baseDirs = workingDirectory.Split(new char[] { ':', '\\', '/' });
    string[] fileDirs = fullPath.Split(new char[] { ':', '\\', '/' });

    // if we failed to split (empty strings?) or the drive letter does not match
    if( baseDirs.Length <= 0 || fileDirs.Length <= 0 || baseDirs[0] != fileDirs[0] )
    {
        // can't create a relative path between separate harddrives/partitions.
        return fullPath;
    }

    // skip all leading directories that match
    for (offset = 1; offset < baseDirs.Length; offset++)
    {
        if (baseDirs[offset] != fileDirs[offset])
            break;
    }

    // back out of the working directory
    for (int i = 0; i < (baseDirs.Length - offset); i++)
    {
        result += "..\\";
    }

    // step into the file path
    for (int i = offset; i < fileDirs.Length-1; i++)
    {
        result += fileDirs[i] + "\\";
    }

    // append the file
    result += fileDirs[fileDirs.Length - 1];

    return result;
}

This code is probably not bullet-proof but this is what I came up with. It's a little more robust. It takes two paths and returns path B as relative to path A.

example:

MakeRelativePath("c:\\dev\\foo\\bar", "c:\\dev\\junk\\readme.txt")
//returns: "..\\..\\junk\\readme.txt"

MakeRelativePath("c:\\dev\\foo\\bar", "c:\\dev\\foo\\bar\\docs\\readme.txt")
//returns: "docs\\readme.txt"

PL/SQL block problem: No data found error

There is an alternative approach I used when I couldn't rely on the EXCEPTION block at the bottom of my procedure. I had variables declared at the beginning:

my_value VARCHAR := 'default';
number_rows NUMBER := 0;
.
.
.
SELECT count(*) FROM TABLE INTO number_rows (etc.)

IF number_rows > 0 -- Then obtain my_value with a query or constant, etc.
END IF;

MVVM: Tutorial from start to finish?

I really liked these articles:

He really dumbs down the concept in a humorous way. Worth reading.

Should I write script in the body or the head of the html?

Head, or before closure of body tag. When DOM loads JS is then executed, that is exactly what jQuery document.ready does.

CSS display: inline vs inline-block

Inline elements:

respect left & right margins and padding, but not top & bottom
cannot have a width and height set
allow other elements to sit to their left and right.
see very important side notes on this here.

Block elements:

respect all of those
force a line break after the block element
acquires full-width if width not defined

Inline-block elements:

allow other elements to sit to their left and right
respect top & bottom margins and padding
respect height and width

From W3Schools:

An inline element has no line break before or after it, and it tolerates HTML elements next to it.

A block element has some whitespace above and below it and does not tolerate any HTML elements next to it.

An inline-block element is placed as an inline element (on the same line as adjacent content), but it behaves as a block element.

When you visualize this, it looks like this:

CSS block vs inline vs inline-block

The image is taken from this page, which also talks some more about this subject.

Swift: Display HTML data in a label or textView

Swift 3.0

var attrStr = try! NSAttributedString(
        data: "<b><i>text</i></b>".data(using: String.Encoding.unicode, allowLossyConversion: true)!,
        options: [ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType],
        documentAttributes: nil)
label.attributedText = attrStr

Matplotlib scatter plot legend

2D scatter plot

Using the scatter method of the matplotlib.pyplot module should work (at least with matplotlib 1.2.1 with Python 2.7.5), as in the example code below. Also, if you are using scatter plots, use scatterpoints=1 rather than numpoints=1 in the legend call to have only one point for each legend entry.

In the code below I've used random values rather than plotting the same range over and over, making all the plots visible (i.e. not overlapping each other).

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

colors = ['b', 'c', 'y', 'm', 'r']

lo = plt.scatter(random(10), random(10), marker='x', color=colors[0])
ll = plt.scatter(random(10), random(10), marker='o', color=colors[0])
l  = plt.scatter(random(10), random(10), marker='o', color=colors[1])
a  = plt.scatter(random(10), random(10), marker='o', color=colors[2])
h  = plt.scatter(random(10), random(10), marker='o', color=colors[3])
hh = plt.scatter(random(10), random(10), marker='o', color=colors[4])
ho = plt.scatter(random(10), random(10), marker='x', color=colors[4])

plt.legend((lo, ll, l, a, h, hh, ho),
           ('Low Outlier', 'LoLo', 'Lo', 'Average', 'Hi', 'HiHi', 'High Outlier'),
           scatterpoints=1,
           loc='lower left',
           ncol=3,
           fontsize=8)

plt.show()

enter image description here

3D scatter plot

To plot a scatter in 3D, use the plot method, as the legend does not support Patch3DCollection as is returned by the scatter method of an Axes3D instance. To specify the markerstyle you can include this as a positional argument in the method call, as seen in the example below. Optionally one can include argument to both the linestyle and marker parameters.

import matplotlib.pyplot as plt
from numpy.random import random
from mpl_toolkits.mplot3d import Axes3D

colors=['b', 'c', 'y', 'm', 'r']

ax = plt.subplot(111, projection='3d')

ax.plot(random(10), random(10), random(10), 'x', color=colors[0], label='Low Outlier')
ax.plot(random(10), random(10), random(10), 'o', color=colors[0], label='LoLo')
ax.plot(random(10), random(10), random(10), 'o', color=colors[1], label='Lo')
ax.plot(random(10), random(10), random(10), 'o', color=colors[2], label='Average')
ax.plot(random(10), random(10), random(10), 'o', color=colors[3], label='Hi')
ax.plot(random(10), random(10), random(10), 'o', color=colors[4], label='HiHi')
ax.plot(random(10), random(10), random(10), 'x', color=colors[4], label='High Outlier')

plt.legend(loc='upper left', numpoints=1, ncol=3, fontsize=8, bbox_to_anchor=(0, 0))

plt.show()

enter image description here

Password Strength Meter

Update: created a js fiddle here to see it live: http://jsfiddle.net/HFMvX/

I went through tons of google searches and didn't find anything satisfying. i like how passpack have done it so essentially reverse-engineered their approach, here we go:

function scorePassword(pass) {
    var score = 0;
    if (!pass)
        return score;

    // award every unique letter until 5 repetitions
    var letters = new Object();
    for (var i=0; i<pass.length; i++) {
        letters[pass[i]] = (letters[pass[i]] || 0) + 1;
        score += 5.0 / letters[pass[i]];
    }

    // bonus points for mixing it up
    var variations = {
        digits: /\d/.test(pass),
        lower: /[a-z]/.test(pass),
        upper: /[A-Z]/.test(pass),
        nonWords: /\W/.test(pass),
    }

    var variationCount = 0;
    for (var check in variations) {
        variationCount += (variations[check] == true) ? 1 : 0;
    }
    score += (variationCount - 1) * 10;

    return parseInt(score);
}

Good passwords start to score around 60 or so, here's function to translate that in words:

function checkPassStrength(pass) {
    var score = scorePassword(pass);
    if (score > 80)
        return "strong";
    if (score > 60)
        return "good";
    if (score >= 30)
        return "weak";

    return "";
}

you might want to tune this a bit but i found it working for me nicely

Timeout function if it takes too long to finish

I rewrote David's answer using the with statement, it allows you do do this:

with timeout(seconds=3):
    time.sleep(4)

Which will raise a TimeoutError.

The code is still using signal and thus UNIX only:

import signal

class timeout:
    def __init__(self, seconds=1, error_message='Timeout'):
        self.seconds = seconds
        self.error_message = error_message
    def handle_timeout(self, signum, frame):
        raise TimeoutError(self.error_message)
    def __enter__(self):
        signal.signal(signal.SIGALRM, self.handle_timeout)
        signal.alarm(self.seconds)
    def __exit__(self, type, value, traceback):
        signal.alarm(0)

What is the difference between % and %% in a cmd file?

(Explanation in more details can be found in an archived Microsoft KB article.)

Three things to know:

The percent sign is used in batch files to represent command line parameters: %1, %2, ...
Two percent signs with any characters in between them are interpreted as a variable:

echo %myvar%
Two percent signs without anything in between (in a batch file) are treated like a single percent sign in a command (not a batch file): %%f

Why's that?

For example, if we execute your (simplified) command line

FOR /f %f in ('dir /b .') DO somecommand %f

in a batch file, rule 2 would try to interpret

%f in ('dir /b .') DO somecommand %

as a variable. In order to prevent that, you have to apply rule 3 and escape the % with an second %:

FOR /f %%f in ('dir /b .') DO somecommand %%f

Is there any way to start with a POST request using Selenium?

Selenium doesn't currently offer API for this, but there are several ways to initiate an HTTP request in your test. It just depends what language you are writing in.

In Java for example, it might look like this:

// setup the request
String request = "startpoint?stuff1=foo&stuff2=bar";
URL url = new URL(request);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("POST");

// get a response - maybe "success" or "true", XML or JSON etc.
InputStream inputStream = connection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
String line;
StringBuffer response = new StringBuffer();
while ((line = bufferedReader.readLine()) != null) {
    response.append(line);
    response.append('\r');
}
bufferedReader.close();

// continue with test
if (response.toString().equals("expected response"){
    // do selenium
}

Disable Copy or Paste action for text box?

You might also need to provide your user with an alert showing that those functions are disabled for the text input fields. This will work

_x000D_

    function showError(){_x000D_
     alert('you are not allowed to cut,copy or paste here');_x000D_
    }_x000D_
    _x000D_
    $('.form-control').bind("cut copy paste",function(e) {_x000D_
     e.preventDefault();_x000D_
    });

_x000D_

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>_x000D_
<textarea class="form-control"  oncopy="showError()" onpaste="showError()"></textarea>

_x000D_

Hide Utility Class Constructor : Utility classes should not have a public or default constructor

You can just use Lombok with access level PRIVATE in @NoArgsConstructor annotation to avoid unnecessary initialization.

@NoArgsConstructor(access = AccessLevel.PRIVATE)

public class FilePathHelper {

// your code

}

Deprecated meaning?

Deprecated means they don't recommend using it, and that it isn't undergoing further development. But it should not work differently than it did in a previous version unless documentation explicitly states that.

Yes, otherwise it wouldn't be called "deprecated"
Unless stated otherwise in docs, it should be the same as before
No, but if there were problems in v1 they aren't about to fix them

How can I scale the content of an iframe?

If you want the iframe and its contents to scale when the window resizes, you can set the following to the window's resize event as well as the iframes onload event.

function()
{
    var _wrapWidth=$('#wrap').width();
    var _frameWidth=$($('#frame')[0].contentDocument).width();

    if(!this.contentLoaded)
      this.initialWidth=_frameWidth;
    this.contentLoaded=true;
    var frame=$('#frame')[0];

    var percent=_wrapWidth/this.initialWidth;

    frame.style.width=100.0/percent+"%";
    frame.style.height=100.0/percent+"%";

    frame.style.zoom=percent;
    frame.style.webkitTransform='scale('+percent+')';
    frame.style.webkitTransformOrigin='top left';
    frame.style.MozTransform='scale('+percent+')';
    frame.style.MozTransformOrigin='top left';
    frame.style.oTransform='scale('+percent+')';
    frame.style.oTransformOrigin='top left';
  };

This will make the iframe and its content scale to 100% width of the wrap div (or whatever percent you want). As an added bonus, you don't have to set the css of the frame to hard coded values since they'll all be set dynamically, you'll just need to worry about how you want the wrap div to display.

I've tested this and it works on chrome, IE11, and firefox.

How to use Macro argument as string literal?

Perhaps you try this solution:

#define QUANTIDISCHI 6
#define QUDI(x) #x
#define QUdi(x) QUDI(x)
. . . 
. . .
unsigned char TheNumber[] = "QUANTIDISCHI = " QUdi(QUANTIDISCHI) "\n";

How to add hamburger menu in bootstrap

All you have to do is read the code on getbootstrap.com:

Codepen

_x000D_

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>_x000D_
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>_x000D_
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css">_x000D_
_x000D_
<nav class="navbar navbar-inverse navbar-static-top" role="navigation">_x000D_
  <div class="container">_x000D_
    <div class="navbar-header">_x000D_
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">_x000D_
                    <span class="sr-only">Toggle navigation</span>_x000D_
                    <span class="icon-bar"></span>_x000D_
                    <span class="icon-bar"></span>_x000D_
                    <span class="icon-bar"></span>_x000D_
                </button>_x000D_
    </div>_x000D_
_x000D_
    <!-- Collect the nav links, forms, and other content for toggling -->_x000D_
    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">_x000D_
      <ul class="nav navbar-nav">_x000D_
        <li><a href="index.php">Home</a></li>_x000D_
        <li><a href="about.php">About</a></li>_x000D_
        <li><a href="#portfolio">Portfolio</a></li>_x000D_
        <li><a href="#">Blog</a></li>_x000D_
        <li><a href="contact.php">Contact</a></li>_x000D_
      </ul>_x000D_
    </div>_x000D_
  </div>_x000D_
</nav>

_x000D_

Is there a way to get a list of all current temporary tables in SQL Server?

SELECT left(NAME, charindex('_', NAME) - 1)
FROM tempdb..sysobjects
WHERE NAME LIKE '#%'
    AND NAME NOT LIKE '##%'
    AND upper(xtype) = 'U'
    AND NOT object_id('tempdb..' + NAME) IS NULL

you can remove the ## line if you want to include global temp tables.

How I can check whether a page is loaded completely or not in web driver?

Here is how I would fix it, using a code snippet to give you a basic idea:

public class IFrame1 extends LoadableComponent<IFrame1> {

    private RemoteWebDriver driver;

    @FindBy(id = "iFrame1TextFieldTestInputControlID" ) public WebElement iFrame1TextFieldInput;
    @FindBy(id = "iFrame1TextFieldTestProcessButtonID" ) public WebElement copyButton;

    public IFrame1( RemoteWebDriver drv ) {
        super();
        this.driver = drv;
        this.driver.switchTo().defaultContent();
        waitTimer(1, 1000);
        this.driver.switchTo().frame("BodyFrame1");
        LOGGER.info("IFrame1 constructor...");
    }

    @Override
    protected void isLoaded() throws Error {        
        LOGGER.info("IFrame1.isLoaded()...");
        PageFactory.initElements( driver, this );
        try {
            assertTrue( "Page visible title is not yet available.", 
                    driver.findElementByCssSelector("body form#webDriverUnitiFrame1TestFormID h1")
                    .getText().equals("iFrame1 Test") );
        } catch ( NoSuchElementException e) {
            LOGGER.info("No such element." );
            assertTrue("No such element.", false);
        }
    }

    /**
     * Method: load
     * Overidden method from the LoadableComponent class.
     * @return  void
     * @throws  null
     */
    @Override
    protected void load() {
        LOGGER.info("IFrame1.load()...");
        Wait<WebDriver> wait = new FluentWait<WebDriver>( driver )
                .withTimeout(30, TimeUnit.SECONDS)
                .pollingEvery(5, TimeUnit.SECONDS)
                .ignoring( NoSuchElementException.class ) 
                .ignoring( StaleElementReferenceException.class ) ;
        wait.until( ExpectedConditions.presenceOfElementLocated( 
                By.cssSelector("body form#webDriverUnitiFrame1TestFormID h1") ) );
    }
....

OnItemClickListener using ArrayAdapter for ListView

Ok, after the information that your Activity extends ListActivity here's a way to implement OnItemClickListener:

public class newListView extends ListView {

    public newListView(Context context) {
        super(context);
    }

    @Override
    public void setOnItemClickListener(
            android.widget.AdapterView.OnItemClickListener listener) {
        super.setOnItemClickListener(listener);
        //do something when item is clicked

    }

}

Boto3 to download all files from a S3 Bucket

Reposting @glefait 's answer with an if condition at the end to avoid os error 20. The first key it gets is the folder name itself which cannot be written in the destination path.

def download_dir(client, resource, dist, local='/tmp', bucket='your_bucket'):
    paginator = client.get_paginator('list_objects')
    for result in paginator.paginate(Bucket=bucket, Delimiter='/', Prefix=dist):
        if result.get('CommonPrefixes') is not None:
            for subdir in result.get('CommonPrefixes'):
                download_dir(client, resource, subdir.get('Prefix'), local, bucket)
        for file in result.get('Contents', []):
            print("Content: ",result)
            dest_pathname = os.path.join(local, file.get('Key'))
            print("Dest path: ",dest_pathname)
            if not os.path.exists(os.path.dirname(dest_pathname)):
                print("here last if")
                os.makedirs(os.path.dirname(dest_pathname))
            print("else file key: ", file.get('Key'))
            if not file.get('Key') == dist:
                print("Key not equal? ",file.get('Key'))
                resource.meta.client.download_file(bucket, file.get('Key'), dest_pathname)enter code here

How to fix "Referenced assembly does not have a strong name" error?

Old question, but I'm surprised no one has mentioned ilmerge yet. ilmerge is from Microsoft, but not shipped with VS or the SDKs. You can download it from here though. There is also a github repository. You can also install from nuget:

PM>Install-Package ilmerge

To use:

ilmerge assembly.dll /keyfile:key.snk /out:assembly.dll /targetplatform:v4,C:\Windows\Microsoft.NET\Framework\v4.0.30319 /ndebug

If needed, You can generate your own keyfile using sn (from VS):

sn -k key.snk

Map enum in JPA with fixed values?

The best approach would be to map a unique ID to each enum type, thus avoiding the pitfalls of ORDINAL and STRING. See this post which outlines 5 ways you can map an enum.

Taken from the link above:

1&2. Using @Enumerated

There are currently 2 ways you can map enums within your JPA entities using the @Enumerated annotation. Unfortunately both EnumType.STRING and EnumType.ORDINAL have their limitations.

If you use EnumType.String then renaming one of your enum types will cause your enum value to be out of sync with the values saved in the database. If you use EnumType.ORDINAL then deleting or reordering the types within your enum will cause the values saved in the database to map to the wrong enums types.

Both of these options are fragile. If the enum is modified without performing a database migration, you could jeopodise the integrity of your data.

3. Lifecycle Callbacks

A possible solution would to use the JPA lifecycle call back annotations, @PrePersist and @PostLoad. This feels quite ugly as you will now have two variables in your entity. One mapping the value stored in the database, and the other, the actual enum.

4. Mapping unique ID to each enum type

The preferred solution is to map your enum to a fixed value, or ID, defined within the enum. Mapping to predefined, fixed value makes your code more robust. Any modification to the order of the enums types, or the refactoring of the names, will not cause any adverse effects.

5. Using Java EE7 @Convert

If you are using JPA 2.1 you have the option to use the new @Convert annotation. This requires the creation of a converter class, annotated with @Converter, inside which you would define what values are saved into the database for each enum type. Within your entity you would then annotate your enum with @Convert.

My preference: (Number 4)

The reason why I prefer to define my ID's within the enum as oppose to using a converter, is good encapsulation. Only the enum type should know of its ID, and only the entity should know about how it maps the enum to the database.

See the original post for the code example.

Hex-encoded String to Byte Array

Use:

str.getBytes("UTF-16LE");

What is a "cache-friendly" code?

Processors today work with many levels of cascading memory areas. So the CPU will have a bunch of memory that is on the CPU chip itself. It has very fast access to this memory. There are different levels of cache each one slower access ( and larger ) than the next, until you get to system memory which is not on the CPU and is relatively much slower to access.

Logically, to the CPU's instruction set you just refer to memory addresses in a giant virtual address space. When you access a single memory address the CPU will go fetch it. in the old days it would fetch just that single address. But today the CPU will fetch a bunch of memory around the bit you asked for, and copy it into the cache. It assumes that if you asked for a particular address that is is highly likely that you are going to ask for an address nearby very soon. For example if you were copying a buffer you would read and write from consecutive addresses - one right after the other.

So today when you fetch an address it checks the first level of cache to see if it already read that address into cache, if it doesn't find it, then this is a cache miss and it has to go out to the next level of cache to find it, until it eventually has to go out into main memory.

Cache friendly code tries to keep accesses close together in memory so that you minimize cache misses.

So an example would be imagine you wanted to copy a giant 2 dimensional table. It is organized with reach row in consecutive in memory, and one row follow the next right after.

If you copied the elements one row at a time from left to right - that would be cache friendly. If you decided to copy the table one column at a time, you would copy the exact same amount of memory - but it would be cache unfriendly.

Effective way to find any file's Encoding

The following code works fine for me, using the StreamReader class:

  using (var reader = new StreamReader(fileName, defaultEncodingIfNoBom, true))
  {
      reader.Peek(); // you need this!
      var encoding = reader.CurrentEncoding;
  }

The trick is to use the Peek call, otherwise, .NET has not done anything (and it hasn't read the preamble, the BOM). Of course, if you use any other ReadXXX call before checking the encoding, it works too.

If the file has no BOM, then the defaultEncodingIfNoBom encoding will be used. There is also a StreamReader without this overload method (in this case, the Default (ANSI) encoding will be used as defaultEncodingIfNoBom), but I recommand to define what you consider the default encoding in your context.

I have tested this successfully with files with BOM for UTF8, UTF16/Unicode (LE & BE) and UTF32 (LE & BE). It does not work for UTF7.

Detect the Enter key in a text input field

The best way I found is using keydown ( the keyup doesn't work well for me).

Note: I also disabled the form submit because usually when you like to do some actions when pressing Enter Key the only think you do not like is to submit the form :)

$('input').keydown( function( event ) {
    if ( event.which === 13 ) {
        // Do something
        // Disable sending the related form
        event.preventDefault();
        return false;
    }
});

PowerShell: Comparing dates

I wanted to show how powerful it can be aside from just checking "-lt".

Example: I used it to calculate time differences take from Windows event view Application log:

Get the difference between the two date times:

PS> $Obj = ((get-date "10/22/2020 12:51:1") - (get-date "10/22/2020 12:20:1 "))

Object created:

PS> $Obj


Days              : 0
Hours             : 0
Minutes           : 31
Seconds           : 0
Milliseconds      : 0
Ticks             : 18600000000
TotalDays         : 0.0215277777777778
TotalHours        : 0.516666666666667
TotalMinutes      : 31
TotalSeconds      : 1860
TotalMilliseconds : 1860000

Access an item directly:

PS> $Obj.Minutes
31

Get User Selected Range

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

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

Dim myRange as Range
Set myRange = Selection

For further reading, check out the MSDN article.

Background images: how to fill whole div if image is small and vice versa

Resize the image to fit the div size.
With CSS3 you can do this:

/* with CSS 3 */
#yourdiv {  
    background: url('bgimage.jpg') no-repeat;
    background-size: 100%;
}

How Do you Stretch a Background Image in a Web Page:

About opacity

#yourdiv {
    opacity: 0.4;
    filter: alpha(opacity=40); /* For IE8 and earlier */
}

Or look at CSS Image Opacity / Transparency

Call to a member function on a non-object

function page_properties($objPortal) {    
    $objPage->set_page_title($myrow['title']);
}

looks like different names of variables $objPortal vs $objPage

MySQLi count(*) always returns 1

Always try to do an associative fetch, that way you can easy get what you want in multiple case result

Here's an example

$result = $mysqli->query("SELECT COUNT(*) AS cityCount FROM myCity")
$row = $result->fetch_assoc();
echo $row['cityCount']." rows in table myCity.";

Checking Bash exit status of several commands efficiently

What do you mean by "drop out and echo the error"? If you mean you want the script to terminate as soon as any command fails, then just do

set -e    # DON'T do this.  See commentary below.

at the start of the script (but note warning below). Do not bother echoing the error message: let the failing command handle that. In other words, if you do:

#!/bin/sh

set -e    # Use caution.  eg, don't do this
command1
command2
command3

and command2 fails, while printing an error message to stderr, then it seems that you have achieved what you want. (Unless I misinterpret what you want!)

As a corollary, any command that you write must behave well: it must report errors to stderr instead of stdout (the sample code in the question prints errors to stdout) and it must exit with a non-zero status when it fails.

However, I no longer consider this to be a good practice. set -e has changed its semantics with different versions of bash, and although it works fine for a simple script, there are so many edge cases that it is essentially unusable. (Consider things like: set -e; foo() { false; echo should not print; } ; foo && echo ok The semantics here are somewhat reasonable, but if you refactor code into a function that relied on the option setting to terminate early, you can easily get bitten.) IMO it is better to write:

 #!/bin/sh

 command1 || exit
 command2 || exit
 command3 || exit

#!/bin/sh

command1 && command2 && command3

jQuery creating objects

I actually found a better way using the jQuery approach

var box = {

config:{
 color: 'red'
},

init:function(config){
 $.extend(this.config,config);
}

};

var myBox = box.init({
 color: blue
});

return string with first match Regex

You could embed the '' default in your regex by adding |$:

>>> re.findall('\d+|$', 'aa33bbb44')[0]
'33'
>>> re.findall('\d+|$', 'aazzzbbb')[0]
''
>>> re.findall('\d+|$', '')[0]
''

Also works with re.search pointed out by others:

>>> re.search('\d+|$', 'aa33bbb44').group()
'33'
>>> re.search('\d+|$', 'aazzzbbb').group()
''
>>> re.search('\d+|$', '').group()
''

Can you target <br /> with css?

I know you can't edit the HTML, but if you can modify the CSS, can you add javascript?

if so, you can include jquery, then you could do

<script language="javascript">
$(document).ready(function() {
    $('br').append('<span class="myclass"></span>');
});
</script>

How to pass values arguments to modal.show() function in Bootstrap

Use

$(document).ready(function() {
    $('#createFormId').on('show.bs.modal', function(event) {
        $("#cafeId").val($(event.relatedTarget).data('id'));
    });
});

How do you render primitives as wireframes in OpenGL?

In Modern OpenGL(OpenGL 3.2 and higher), you could use a Geometry Shader for this :

#version 330

layout (triangles) in;
layout (line_strip /*for lines, use "points" for points*/, max_vertices=3) out;

in vec2 texcoords_pass[]; //Texcoords from Vertex Shader
in vec3 normals_pass[]; //Normals from Vertex Shader

out vec3 normals; //Normals for Fragment Shader
out vec2 texcoords; //Texcoords for Fragment Shader

void main(void)
{
    int i;
    for (i = 0; i < gl_in.length(); i++)
    {
        texcoords=texcoords_pass[i]; //Pass through
        normals=normals_pass[i]; //Pass through
        gl_Position = gl_in[i].gl_Position; //Pass through
        EmitVertex();
    }
    EndPrimitive();
}

Notices :

for points, change layout (line_strip, max_vertices=3) out; to layout (points, max_vertices=3) out;
Read more about Geometry Shaders

LIKE vs CONTAINS on SQL Server

Having run both queries on a SQL Server 2012 instance, I can confirm the first query was fastest in my case.

The query with the LIKE keyword showed a clustered index scan.

The CONTAINS also had a clustered index scan with additional operators for the full text match and a merge join.

Plan

Remove Identity from a column in a table

You cannot remove an IDENTITY specification once set.

To remove the entire column:

ALTER TABLE yourTable
DROP COLUMN yourCOlumn;

Information about ALTER TABLE here

If you need to keep the data, but remove the IDENTITY column, you will need to:

Create a new column
Transfer the data from the existing IDENTITY column to the new column
Drop the existing IDENTITY column.
Rename the new column to the original column name

What does <? php echo ("<pre>"); ..... echo("</pre>"); ?> mean?

echo (""); is a php code, and <prev> tries to be HTML, but isn't.

As @pekka said, its probably supposed to be <pre>

Remove all whitespaces from NSString

I prefer using regex like this:

NSString *myString = @"this is a test";
NSString *myNewString = [myString stringByReplacingOccurrencesOfString:@"\\s"
                                     withString:@""
                                        options:NSRegularExpressionSearch
                                          range:NSMakeRange(0, [myStringlength])];
 //myNewString will be @"thisisatest"

You can make yourself a category on NSString to make life even easier:

- (NSString *) removeAllWhitespace
{
    return [self stringByReplacingOccurrencesOfString:@"\\s" withString:@""
                                              options:NSRegularExpressionSearch
                                                range:NSMakeRange(0, [self length])];

}

Here is a unit test method on it too:

- (void) testRemoveAllWhitespace
{
    NSString *testResult = nil;

    NSArray *testStringsArray        = @[@""
                                         ,@"    "
                                         ,@"  basicTest    "
                                         ,@"  another Test \n"
                                         ,@"a b c d e f g"
                                         ,@"\n\tA\t\t \t \nB    \f  C \t  ,d,\ve   F\r\r\r"
                                         ,@"  landscape, portrait,     ,,,up_side-down   ;asdf;  lkjfasdf0qi4jr0213 ua;;;;af!@@##$$ %^^ & *  * ()+  +   "
                                         ];

    NSArray *expectedResultsArray   = @[@""
                                        ,@""
                                        ,@"basicTest"
                                        ,@"anotherTest"
                                        ,@"abcdefg"
                                        ,@"ABC,d,eF"
                                        ,@"landscape,portrait,,,,up_side-down;asdf;lkjfasdf0qi4jr0213ua;;;;af!@@##$$%^^&**()++"
                                        ];

    for (int i=0; i < [testStringsArray count]; i++)
    {
        testResult = [testStringsArray[i] removeAllWhitespace];
        STAssertTrue([testResult isEqualToString:expectedResultsArray[i]], @"Expected: \"%@\" to become: \"%@\", but result was \"%@\"",
                     testStringsArray[i], expectedResultsArray[i], testResult);
    }
}

How to Set AllowOverride all

I think you want to set it in your httpd.conf file instead of the .htaccess file.

I am not sure what OS you use, but this link for Ubuntu might give you some pointers on what to do.

https://help.ubuntu.com/community/EnablingUseOfApacheHtaccessFiles

Passing an array by reference

It's just the required syntax:

void Func(int (&myArray)[100])

^ Pass array of 100 int by reference the parameters name is myArray;

void Func(int* myArray)

^ Pass an array. Array decays to a pointer. Thus you lose size information.

void Func(int (*myFunc)(double))

^ Pass a function pointer. The function returns an int and takes a double. The parameter name is myFunc.

How to access private data members outside the class without making "friend"s?

It's possible to access the private data of class directly in main and other's function...

here is a small code...

class GIFT
{
    int i,j,k;

public:
    void Fun() 
    {
        cout<< i<<" "<< j<<" "<< k;
    }

};

int main()
{
     GIFT *obj=new GIFT(); // the value of i,j,k is 0
     int *ptr=(int *)obj;
     *ptr=10;
     cout<<*ptr;      // you also print value of I
     ptr++;
     *ptr=15;
     cout<<*ptr;      // you also print value of J
     ptr++;
     *ptr=20; 
     cout<<*ptr;      // you also print value of K
     obj->Fun();
}

Why Would I Ever Need to Use C# Nested Classes

The purpose is typically just to restrict the scope of the nested class. Nested classes compared to normal classes have the additional possibility of the private modifier (as well as protected of course).

Basically, if you only need to use this class from within the "parent" class (in terms of scope), then it is usually appropiate to define it as a nested class. If this class might need to be used from without the assembly/library, then it is usually more convenient to the user to define it as a separate (sibling) class, whether or not there is any conceptual relationship between the two classes. Even though it is technically possible to create a public class nested within a public parent class, this is in my opinion rarely an appropiate thing to implement.

Setting JDK in Eclipse

Some additional steps may be needed to set both the project and default workspace JRE correctly, as MayoMan mentioned. Here is the complete sequence in Eclipse Luna:

Right click your project > properties
Select “Java Build Path” on left, then “JRE System Library”, click Edit…
Select "Workspace Default JRE"
Click "Installed JREs"
If you see JRE you want in the list select it (selecting a JDK is OK too)
If not, click Search…, navigate to Computer > Windows C: > Program Files > Java, then click OK
Now you should see all installed JREs, select the one you want
Click OK/Finish a million times

Easy.... not.

How to use mysql JOIN without ON condition?

See some example in http://www.sitepoint.com/understanding-sql-joins-mysql-database/

You can use 'USING' instead of 'ON' as in the query

SELECT * FROM table1 LEFT JOIN table2 USING (id);

Granting DBA privileges to user in Oracle

You need only to write:

GRANT DBA TO NewDBA;

Because this already makes the user a DB Administrator

JQuery - Storing ajax response into global variable

     function get(a){
            bodyContent = $.ajax({
                  url: "/rpc.php",
                  global: false,
                  type: "POST",
                  data: a,
                  dataType: "html",
                  async:false
               } 
            ).responseText;
            return bodyContent;

  }

Print number of keys in Redis

Go to redis-cli and use below command

info keyspace

It may help someone

Nested ifelse statement

If the data set contains many rows it might be more efficient to join with a lookup table using data.table instead of nested ifelse().

Provided the lookup table below

lookup

     idnat     idbp   idnat2
1:  french mainland mainland
2:  french   colony overseas
3:  french overseas overseas
4: foreign  foreign  foreign

and a sample data set

library(data.table)
n_row <- 10L
set.seed(1L)
DT <- data.table(idnat = "french",
                 idbp = sample(c("mainland", "colony", "overseas", "foreign"), n_row, replace = TRUE))
DT[idbp == "foreign", idnat := "foreign"][]

      idnat     idbp
 1:  french   colony
 2:  french   colony
 3:  french overseas
 4: foreign  foreign
 5:  french mainland
 6: foreign  foreign
 7: foreign  foreign
 8:  french overseas
 9:  french overseas
10:  french mainland

then we can do an update while joining:

DT[lookup, on = .(idnat, idbp), idnat2 := i.idnat2][]

      idnat     idbp   idnat2
 1:  french   colony overseas
 2:  french   colony overseas
 3:  french overseas overseas
 4: foreign  foreign  foreign
 5:  french mainland mainland
 6: foreign  foreign  foreign
 7: foreign  foreign  foreign
 8:  french overseas overseas
 9:  french overseas overseas
10:  french mainland mainland

What does template <unsigned int N> mean?

Yes, it is a non-type parameter. You can have several kinds of template parameters

Type Parameters.
- Types
- Templates (only classes and alias templates, no functions or variable templates)
Non-type Parameters
- Pointers
- References
- Integral constant expressions

What you have there is of the last kind. It's a compile time constant (so-called constant expression) and is of type integer or enumeration. After looking it up in the standard, i had to move class templates up into the types section - even though templates are not types. But they are called type-parameters for the purpose of describing those kinds nonetheless. You can have pointers (and also member pointers) and references to objects/functions that have external linkage (those that can be linked to from other object files and whose address is unique in the entire program). Examples:

Template type parameter:

template<typename T>
struct Container {
    T t;
};

// pass type "long" as argument.
Container<long> test;

Template integer parameter:

template<unsigned int S>
struct Vector {
    unsigned char bytes[S];
};

// pass 3 as argument.
Vector<3> test;

Template pointer parameter (passing a pointer to a function)

template<void (*F)()>
struct FunctionWrapper {
    static void call_it() { F(); }
};

// pass address of function do_it as argument.
void do_it() { }
FunctionWrapper<&do_it> test;

Template reference parameter (passing an integer)

template<int &A>
struct SillyExample {
    static void do_it() { A = 10; }
};

// pass flag as argument
int flag;
SillyExample<flag> test;

Template template parameter.

template<template<typename T> class AllocatePolicy>
struct Pool {
    void allocate(size_t n) {
        int *p = AllocatePolicy<int>::allocate(n);
    }
};

// pass the template "allocator" as argument. 
template<typename T>
struct allocator { static T * allocate(size_t n) { return 0; } };
Pool<allocator> test;

A template without any parameters is not possible. But a template without any explicit argument is possible - it has default arguments:

template<unsigned int SIZE = 3>
struct Vector {
    unsigned char buffer[SIZE];
};

Vector<> test;

Syntactically, template<> is reserved to mark an explicit template specialization, instead of a template without parameters:

template<>
struct Vector<3> {
    // alternative definition for SIZE == 3
};

Warning: mysqli_error() expects exactly 1 parameter, 0 given error

mysqli_error() needs you to pass the connection to the database as a parameter. Documentation here has some helpful examples:

http://php.net/manual/en/mysqli.error.php

Try altering your problem line like so and you should be in good shape:

$query = mysqli_query($myConnection, $sqlCommand) or die (mysqli_error($myConnection));

How to scroll to top of long ScrollView layout?

This is force scroll for scrollview :

            scrollView.post(new Runnable() {
                @Override
                public void run() {
                    scrollView.scrollTo(0, 0);
                    scrollView.pageScroll(View.FOCUS_UP);
                    scrollView.smoothScrollTo(0,0);
                }
            });

Format date and time in a Windows batch script

Using % you will run into a hex operation error when the time value is 7-9. To avoid this, use DelayedExpansion and grab time values with !min:~1!

An alternate method, if you have PowerShell is to call that:

for /F "usebackq delims=Z" %%i IN (`powershell Get-Date -format u`) do (set server-time=%%i)

Disable form auto submit on button click

<button>'s are in fact submit buttons, they have no other main functionality. You will have to set the type to button.
But if you bind your event handler like below, you target all buttons and do not have to do it manually for each button!

$('form button').on("click",function(e){
    e.preventDefault();
});

Force IE9 to emulate IE8. Possible?

Yes. Recent versions of IE (IE8 or above) let you adjust that. Here's how:

Fire up Internet Explorer.
Click the 'Tools' menu, then click 'Developer Tools'. Alternatively, just press F12.

That should open the Developer Tools window. That window has two menu items that are of interest:

Browser Mode. This setting determines the value of the user-agent header sent for every request.
Document Mode. This setting determines how the rendering engine renders the page.

More at http://blogs.msdn.com/b/ie/archive/2010/06/16/ie-s-compatibility-features-for-site-developers.aspx

Set a form's action attribute when submitting?

Attach to the submit button click event and change the action attribute in the event handler.

How to ORDER BY a SUM() in MySQL?

The problem I see here is that "sum" is an aggregate function.

first, you need to fix the query itself.

Select sum(c_counts + f_counts) total, [column to group sums by]
from table
group by [column to group sums by]

then, you can sort it:

Select *
from (query above) a
order by total

EDIT: But see post by Virat. Perhaps what you want is not the sum of your total fields over a group, but just the sum of those fields for each record. In that case, Virat has the right solution.

Auto refresh page every 30 seconds

If you want refresh the page you could use like this, but refreshing the page is usually not the best method, it better to try just update the content that you need to be updated.

javascript:

<script language="javascript">
setTimeout(function(){
   window.location.reload(1);
}, 30000);
</script>

Clear git local cache

git rm --cached *.FileExtension

This must ignore all files from this extension

Difference between <span> and <div> with text-align:center;?

It might be, because your span element sets is side as width as its content. if you have a div with 500px width and text-align center, and you enter a span tag it should be aligned in the center. So your problem might be a CSS one. Install Firebug at Firefox and check the style attributes your span or div object has.

Group By Eloquent ORM

Eloquent uses the query builder internally, so you can do:

$users = User::orderBy('name', 'desc')
                ->groupBy('count')
                ->having('count', '>', 100)
                ->get();

Angular 2 'component' is not a known element

I am beginning Angular and in my case, the issue was that I hadn't saved the file after adding the 'import' statement.

What are the differences between .gitignore and .gitkeep?

This is not an answer to the original question "What are the differences between .gitignore and .gitkeep?" but posting here to help people to keep track of empty dir in a simple fashion. To track empty directory and knowling that .gitkeep is not official part of git,

just add a empty (with no content) .gitignore file in it.

So for e.g. if you have /project/content/posts and sometimes posts directory might be empty then create empty file /project/content/posts/.gitignore with no content to track that directory and its future files in git.

get current date and time in groovy?

Date has the time part, so we only need to extract it from Date

I personally prefer the default format parameter of the Date when date and time needs to be separated instead of using the extra SimpleDateFormat

Date date = new Date()
String datePart = date.format("dd/MM/yyyy")
String timePart = date.format("HH:mm:ss")

println "datePart : " + datePart + "\ttimePart : " + timePart

Bootstrap 3.0: How to have text and input on same line?

In Bootstrap 4 for Horizontal element you can use .row with .col-*-* classes to specify the width of your labels and controls. see this link.

And if you want to display a series of labels, form controls, and buttons on a single horizontal row you can use .form-inline for more info this link

How do I 'overwrite', rather than 'merge', a branch on another branch in Git?

Other answers looked incomplete.
I have tried below in full, and it worked fine.

NOTE:
1. Make a copy of your repository before you try below, to be on safe side.

Details:
1. All development happens in dev branch
2. qa branch is just the same copy of dev
3. Time to time, dev code needs to be moved/overwrite to qa branch

so we need to overwrite qa branch, from dev branch

Part 1:
With below commands, old qa has been updated to newer dev:

git checkout dev
git merge -s ours qa
git checkout qa
git merge dev
git push

Automatic comment for last push gives below:

// Output:
//  *<MYNAME> Merge branch 'qa' into dev,*

This comment looks reverse, because above sequence also looks reverse

Part 2:

Below are unexpected, new local commits in dev, the unnecessary ones
so, we need to throw away, and make dev untouched.

git checkout dev

// Output:
//  Switched to branch 'dev'  
//  Your branch is ahead of 'origin/dev' by 15 commits.  
//  (use "git push" to publish your local commits)


git reset --hard origin/dev  

//  Now we threw away the unexpected commits

Part 3:
Verify everything is as expected:

git status  

// Output:
//  *On branch dev  
//  Your branch is up-to-date with 'origin/dev'.  
//  nothing to commit, working tree clean*

That's all.
1. old qa is now overwritten by new dev branch code
2. local is clean (remote origin/dev is untouched)

How to set the part of the text view is clickable

You can use sample code. You want to learn detail about ClickableSpan. Please check this documentaion

  SpannableString myString = new SpannableString("This is example");
            
            ClickableSpan clickableSpan = new ClickableSpan() {
                    @Override
                    public void onClick(View textView) {
                        ToastUtil.show(getContext(),"Clicked Smile ");
                    }
                };
        
        //For Click
         myString.setSpan(clickableSpan,startIndex,lastIndex,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        
        //For UnderLine
         myString.setSpan(new UnderlineSpan(),startIndex,lastIndex,0);
        
        //For Bold
        myString.setSpan(new StyleSpan(Typeface.BOLD),startIndex,lastIndex,0);
        
        //Finally you can set to textView. 
        
        TextView textView = (TextView) findViewById(R.id.txtSpan);
        textView.setText(myString);
        textView.setMovementMethod(LinkMovementMethod.getInstance());

Ripple effect on Android Lollipop CardView

If there is a root layout like RelativeLayout or LinearLayout which contain all of the adapter item's component in CardView, you have to set background attribute in that root layout. like:

<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="122dp"
android:layout_marginBottom="6dp"
android:layout_marginLeft="6dp"
android:layout_marginRight="6dp"
card_view:cardCornerRadius="4dp">

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/touch_bg"/>
</android.support.v7.widget.CardView>

How to change the button text for 'Yes' and 'No' buttons in the MessageBox.Show dialog?

Just add a new form and add buttons and a label. Give the value to be shown and the text of the button, etc. in its constructor, and call it from anywhere you want in the project.

In project -> Add Component -> Windows Form and select a form

Add some label and buttons.

Initialize the value in constructor and call it from anywhere.

public class form1:System.Windows.Forms.Form
{
    public form1()
    {
    }

    public form1(string message,string buttonText1,string buttonText2)
    {
       lblMessage.Text = message;
       button1.Text = buttonText1;
       button2.Text = buttonText2;
    }
}

// Write code for button1 and button2 's click event in order to call 
// from any where in your current project.

// Calling

Form1 frm = new Form1("message to show", "buttontext1", "buttontext2");
frm.ShowDialog();

Toggle visibility property of div

To do it with an effect like with $.fadeIn() and $.fadeOut() you can use transitions

.visible {
  visibility: visible;
  opacity: 1;
  transition: opacity 1s linear;
}
.hidden {
  visibility: hidden;
  opacity: 0;
  transition: visibility 0s 1s, opacity 1s linear;
}

How to add a right button to a UINavigationController?

Try adding the button to the navigationItem of the view controller that is going to be pushed onto this PropertyViewController class you have created.

That is:

MainViewController *vc = [[MainViewController alloc] initWithNibName:@"MainViewController" bundle:nil];
UIButton *infoButton = [UIButton buttonWithType:UIButtonTypeInfoLight];
[infoButton addTarget:self action:@selector(showInfo) forControlEvents:UIControlEventTouchUpInside];
vc.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] initWithCustomView:infoButton] autorelease];

PropertyViewController *navController = [[PropertyViewController alloc] initWithRootViewController:vc];

Now, this infoButton that has been created programatically will show up in the navigation bar. The idea is that the navigation controller picks up its display information (title, buttons, etc) from the UIViewController that it is about to display. You don't actually add buttons and such directly to the UINavigationController.

Java String.split() Regex

String[] ops = str.split("\\s*[a-zA-Z]+\\s*");
String[] notops = str.split("\\s*[^a-zA-Z]+\\s*");
String[] res = new String[ops.length+notops.length-1];
for(int i=0; i<res.length; i++) res[i] = i%2==0 ? notops[i/2] : ops[i/2+1];

This should do it. Everything nicely stored in res.

Using 'starts with' selector on individual class names

I'd recommend making "apple" its own class. You should avoid the starts-with/ends-with if you can because being able to select using div.apple would be a lot faster. That's the more elegant solution. Don't be afraid to split things out into separate classes if it makes the task simpler/faster.

HTTP GET request in JavaScript?

You can get an HTTP GET request in two ways:

This approach based on xml format. You have to pass the URL for the request.
```
xmlhttp.open("GET","URL",true);
xmlhttp.send();
```

This one is based on jQuery. You have to specify the URL and function_name you want to call.

$("btn").click(function() {
  $.ajax({url: "demo_test.txt", success: function_name(result) {
    $("#innerdiv").html(result);
  }});
});

Get value from input (AngularJS)

If your markup is bound to a controller, directive or anything else with a $scope:

console.log($scope.movie);

Upload Progress Bar in PHP

Another uploader full JS : http://developers.sirika.com/mfu/

Its free ( BSD licence )
Internationalizable
cross browser compliant
you have the choice to install APC or not ( underterminate progress bar VS determinate progress bar )
Customizable look as it uses dojo template mechanism. You can add your class / Ids in the te templates according to your css

have fun

Do we have router.reload in vue-router?

vueObject.$forceUpdate();

why don't you use forceUpdate method?

How do I get started with Node.js

First, learn the core concepts of Node.js:

Then, you're going to want to see what the community has to offer:

The gold standard for Node.js package management is NPM.

Finally, you're going to want to know what some of the more popular packages are for various tasks:

Useful Tools for Every Project:

Underscore contains just about every core utility method you want.
Lo-Dash is a clone of Underscore that aims to be faster, more customizable, and has quite a few functions that underscore doesn't have. Certain versions of it can be used as drop-in replacements of underscore.
TypeScript makes JavaScript considerably more bearable, while also keeping you out of trouble!
JSHint is a code-checking tool that'll save you loads of time finding stupid errors. Find a plugin for your text editor that will automatically run it on your code.

Unit Testing:

Mocha is a popular test framework.
Vows is a fantastic take on asynchronous testing, albeit somewhat stale.
Expresso is a more traditional unit testing framework.
node-unit is another relatively traditional unit testing framework.
AVA is a new test runner with Babel built-in and runs tests concurrently.

Web Frameworks:

Express.js is by far the most popular framework.
Koa is a new web framework designed by the team behind Express.js, which aims to be a smaller, more expressive, and more robust foundation for web applications and APIs.
sails.js the most popular MVC framework for Node.js, and is based on express. It is designed to emulate the familiar MVC pattern of frameworks like Ruby on Rails, but with support for the requirements of modern apps: data-driven APIs with a scalable, service-oriented architecture.
Meteor bundles together jQuery, Handlebars, Node.js, WebSocket, MongoDB, and DDP and promotes convention over configuration without being a Ruby on Rails clone.
Tower (deprecated) is an abstraction of a top of Express.js that aims to be a Ruby on Rails clone.
Geddy is another take on web frameworks.
RailwayJS is a Ruby on Rails inspired MVC web framework.
Sleek.js is a simple web framework, built upon Express.js.
Hapi is a configuration-centric framework with built-in support for input validation, caching, authentication, etc.
Trails is a modern web application framework. It builds on the pedigree of Rails and Grails to accelerate development by adhering to a straightforward, convention-based, API-driven design philosophy.
Danf is a full-stack OOP framework providing many features in order to produce a scalable, maintainable, testable and performant applications and allowing to code the same way on both the server (Node.js) and client (browser) sides.
Derbyjs is a reactive full-stack JavaScript framework. They are using patterns like reactive programming and isomorphic JavaScript for a long time.
Loopback.io is a powerful Node.js framework for creating APIs and easily connecting to backend data sources. It has an Angular.js SDK and provides SDKs for iOS and Android.

Web Framework Tools:

Jade is the HAML/Slim of the Node.js world
EJS is a more traditional templating language.
Don't forget about Underscore's template method!

Networking:

Connect is the Rack or WSGI of the Node.js world.
Request is a very popular HTTP request library.
socket.io is handy for building WebSocket servers.

Command Line Interaction:

minimist just command line argument parsing.
Yargs is a powerful library for parsing command-line arguments.
Commander.js is a complete solution for building single-use command-line applications.
Vorpal.js is a framework for building mature, immersive command-line applications.
Chalk makes your CLI output pretty.

Code Generators:

Yeoman Scaffolding tool from the command-line.
Skaffolder Code generator with visual and command-line interface. It generates a customizable CRUD application starting from the database schema or an OpenAPI 3.0 YAML file.

Work with streams:

mississipi everything you miss about streams.
https://github.com/calvinmetcalf/streams-a-love-story
http://maxogden.com/node-streams.html
https://github.com/substack/stream-handbook
How streams help to raise Node.js performance

Simple pagination in javascript

I created a class structure for collections in general that would meet this requirement. and it looks like this:

class Collection {

    constructor() {
        this.collection = [];
        this.index = 0;
    }

    log() {
        return console.log(this.collection);
    }

    push(value) {
        return this.collection.push(value);
    }

    pushAll(...values) {
        return this.collection.push(...values);
    }

    pop() {
        return this.collection.pop();
    }

    shift() {
        return this.collection.shift();
    }

    unshift(value) {
        return this.collection.unshift(value);
    }

    unshiftAll(...values) {
        return this.collection.unshift(...values);
    }

    remove(index) {
        return this.collection.splice(index, 1);
    }

    add(index, value) {
        return this.collection.splice(index, 0, value);
    }

    replace(index, value) {
        return this.collection.splice(index, 1, value);
    }

    clear() {
        this.collection.length = 0;
    }

    isEmpty() {
        return this.collection.length === 0;
    }

    viewFirst() {
        return this.collection[0];
    }

    viewLast() {
        return this.collection[this.collection.length - 1];
    }

    current(){
        if((this.index <= this.collection.length - 1) && (this.index >= 0)){
            return this.collection[this.index];
        }
        else{
            return `Object index exceeds collection range.`;
        }
    }

    next() {
        this.index++;
        this.index > this.collection.length - 1 ? this.index = 0 : this.index;
        return this.collection[this.index];
    }

    previous(){
        this.index--;
        this.index < 0 ? (this.index = this.collection.length-1) : this.index;
        return this.collection[this.index];
    }
}

...and essentially what you would do is have a collection of arrays of whatever length for your pages pushed into the class object, and then use the next() and previous() functions to display whatever 'page' (index) you wanted to display. Would essentially look like this:

let books = new Collection();
let firstPage - [['dummyData'], ['dummyData'], ['dummyData'], ['dummyData'], ['dummyData'],];
let secondPage - [['dumberData'], ['dumberData'], ['dumberData'], ['dumberData'], ['dumberData'],];
books.pushAll(firstPage, secondPage); // loads each array individually
books.current() // display firstPage
books.next() // display secondPage

ImportError in importing from sklearn: cannot import name check_build

My solution for Python 3.6.5 64-bit Windows 10:

pip uninstall sklearn
pip uninstall scikit-learn
pip install sklearn

No need to restart command-line but you can do this if you want. It took me one day to fix this bug. Hope this help.

After MySQL install via Brew, I get the error - The server quit without updating PID file

I had this problem on Linux, but the cause is relevant to any mysql installation. In my case, the server was crashing before startup was complete and the pid file updated. The error messages were seen when starting up mysqld directly instead of via "service mysql start".

In my case, the cause was the partition where the log files were located being full. Removing log files permitted mysql to start again. To test for this issue, go to the location of your mysql activity logs, and do df ..

How to exit when back button is pressed?

Add this code in the activity from where you want to exit from the app on pressing back button:

@Override
public void onBackPressed() {
    super.onBackPressed();
    exitFromApp();
}

private void exitFromApp() {
    Intent intent = new Intent(Intent.ACTION_MAIN);
    intent.addCategory(Intent.CATEGORY_HOME);
    startActivity(intent);
}

Is calculating an MD5 hash less CPU intensive than SHA family functions?

The real answer is : It depends

There are a couple factors to consider, the most obvious are : the cpu you are running these algorithms on and the implementation of the algorithms.

For instance, me and my friend both run the exact same openssl version and get slightly different results with different Intel Core i7 cpus.

My test at work with an Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz

The 'numbers' are in 1000s of bytes per second processed.
type             16 bytes     64 bytes    256 bytes   1024 bytes   8192 bytes
md5              64257.97k   187370.26k   406435.07k   576544.43k   649827.67k
sha1             73225.75k   202701.20k   432679.68k   601140.57k   679900.50k

And his with an Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz

The 'numbers' are in 1000s of bytes per second processed.
type             16 bytes     64 bytes    256 bytes   1024 bytes   8192 bytes
md5              51859.12k   156255.78k   350252.00k   513141.73k   590701.52k
sha1             56492.56k   156300.76k   328688.76k   452450.92k   508625.68k

We both are running the exact same binaries of OpenSSL 1.0.1j 15 Oct 2014 from the ArchLinux official package.

My opinion on this is that with the added security of sha1, cpu designers are more likely to improve the speed of sha1 and more programmers will be working on the algorithm's optimization than md5sum.

I guess that md5 will no longer be used some day since it seems that it has no advantage over sha1. I also tested some cases on real files and the results were always the same in both cases (likely limited by disk I/O).

md5sum of a large 4.6GB file took the exact same time than sha1sum of the same file, same goes with many small files (488 in the same directory). I ran the tests a dozen times and they were consitently getting the same results.

It would be very interesting to investigate this further. I guess there are some experts around that could provide a solid answer to why sha1 is getting faster than md5 on newer processors.

What are Aggregates and PODs and how/why are they special?

What changes for C++11?

Aggregates

The standard definition of an aggregate has changed slightly, but it's still pretty much the same:

An aggregate is an array or a class (Clause 9) with no user-provided constructors (12.1), no brace-or-equal-initializers for non-static data members (9.2), no private or protected non-static data members (Clause 11), no base classes (Clause 10), and no virtual functions (10.3).

Ok, what changed?

Previously, an aggregate could have no user-declared constructors, but now it can't have user-provided constructors. Is there a difference? Yes, there is, because now you can declare constructors and default them:
```
struct Aggregate {
    Aggregate() = default; // asks the compiler to generate the default implementation
};
```
This is still an aggregate because a constructor (or any special member function) that is defaulted on the first declaration is not user-provided.
Now an aggregate cannot have any brace-or-equal-initializers for non-static data members. What does this mean? Well, this is just because with this new standard, we can initialize members directly in the class like this:
```
struct NotAggregate {
    int x = 5; // valid in C++11
    std::vector<int> s{1,2,3}; // also valid
};
```
Using this feature makes the class no longer an aggregate because it's basically equivalent to providing your own default constructor.

So, what is an aggregate didn't change much at all. It's still the same basic idea, adapted to the new features.

What about PODs?

PODs went through a lot of changes. Lots of previous rules about PODs were relaxed in this new standard, and the way the definition is provided in the standard was radically changed.

The idea of a POD is to capture basically two distinct properties:

It supports static initialization, and
Compiling a POD in C++ gives you the same memory layout as a struct compiled in C.

Because of this, the definition has been split into two distinct concepts: trivial classes and standard-layout classes, because these are more useful than POD. The standard now rarely uses the term POD, preferring the more specific trivial and standard-layout concepts.

The new definition basically says that a POD is a class that is both trivial and has standard-layout, and this property must hold recursively for all non-static data members:

A POD struct is a non-union class that is both a trivial class and a standard-layout class, and has no non-static data members of type non-POD struct, non-POD union (or array of such types). Similarly, a POD union is a union that is both a trivial class and a standard layout class, and has no non-static data members of type non-POD struct, non-POD union (or array of such types). A POD class is a class that is either a POD struct or a POD union.

Let's go over each of these two properties in detail separately.

Trivial classes

Trivial is the first property mentioned above: trivial classes support static initialization. If a class is trivially copyable (a superset of trivial classes), it is ok to copy its representation over the place with things like memcpy and expect the result to be the same.

The standard defines a trivial class as follows:

A trivially copyable class is a class that:

— has no non-trivial copy constructors (12.8),

— has no non-trivial move constructors (12.8),

— has no non-trivial copy assignment operators (13.5.3, 12.8),

— has no non-trivial move assignment operators (13.5.3, 12.8), and

— has a trivial destructor (12.4).

A trivial class is a class that has a trivial default constructor (12.1) and is trivially copyable.

[ Note: In particular, a trivially copyable or trivial class does not have virtual functions or virtual base classes.—end note ]

So, what are all those trivial and non-trivial things?

A copy/move constructor for class X is trivial if it is not user-provided and if

— class X has no virtual functions (10.3) and no virtual base classes (10.1), and

— the constructor selected to copy/move each direct base class subobject is trivial, and

— for each non-static data member of X that is of class type (or array thereof), the constructor selected to copy/move that member is trivial;

otherwise the copy/move constructor is non-trivial.

Basically this means that a copy or move constructor is trivial if it is not user-provided, the class has nothing virtual in it, and this property holds recursively for all the members of the class and for the base class.

The definition of a trivial copy/move assignment operator is very similar, simply replacing the word "constructor" with "assignment operator".

A trivial destructor also has a similar definition, with the added constraint that it can't be virtual.

And yet another similar rule exists for trivial default constructors, with the addition that a default constructor is not-trivial if the class has non-static data members with brace-or-equal-initializers, which we've seen above.

Here are some examples to clear everything up:

// empty classes are trivial
struct Trivial1 {};

// all special members are implicit
struct Trivial2 {
    int x;
};

struct Trivial3 : Trivial2 { // base class is trivial
    Trivial3() = default; // not a user-provided ctor
    int y;
};

struct Trivial4 {
public:
    int a;
private: // no restrictions on access modifiers
    int b;
};

struct Trivial5 {
    Trivial1 a;
    Trivial2 b;
    Trivial3 c;
    Trivial4 d;
};

struct Trivial6 {
    Trivial2 a[23];
};

struct Trivial7 {
    Trivial6 c;
    void f(); // it's okay to have non-virtual functions
};

struct Trivial8 {
     int x;
     static NonTrivial1 y; // no restrictions on static members
};

struct Trivial9 {
     Trivial9() = default; // not user-provided
      // a regular constructor is okay because we still have default ctor
     Trivial9(int x) : x(x) {};
     int x;
};

struct NonTrivial1 : Trivial3 {
    virtual void f(); // virtual members make non-trivial ctors
};

struct NonTrivial2 {
    NonTrivial2() : z(42) {} // user-provided ctor
    int z;
};

struct NonTrivial3 {
    NonTrivial3(); // user-provided ctor
    int w;
};
NonTrivial3::NonTrivial3() = default; // defaulted but not on first declaration
                                      // still counts as user-provided
struct NonTrivial5 {
    virtual ~NonTrivial5(); // virtual destructors are not trivial
};

Standard-layout

Standard-layout is the second property. The standard mentions that these are useful for communicating with other languages, and that's because a standard-layout class has the same memory layout of the equivalent C struct or union.

This is another property that must hold recursively for members and all base classes. And as usual, no virtual functions or virtual base classes are allowed. That would make the layout incompatible with C.

A relaxed rule here is that standard-layout classes must have all non-static data members with the same access control. Previously these had to be all public, but now you can make them private or protected, as long as they are all private or all protected.

When using inheritance, only one class in the whole inheritance tree can have non-static data members, and the first non-static data member cannot be of a base class type (this could break aliasing rules), otherwise, it's not a standard-layout class.

This is how the definition goes in the standard text:

A standard-layout class is a class that:

— has no non-static data members of type non-standard-layout class (or array of such types) or reference,

— has no virtual functions (10.3) and no virtual base classes (10.1),

— has the same access control (Clause 11) for all non-static data members,

— has no non-standard-layout base classes,

— either has no non-static data members in the most derived class and at most one base class with non-static data members, or has no base classes with non-static data members, and

— has no base classes of the same type as the first non-static data member.

A standard-layout struct is a standard-layout class defined with the class-key struct or the class-key class.

A standard-layout union is a standard-layout class defined with the class-key union.

[ Note: Standard-layout classes are useful for communicating with code written in other programming languages. Their layout is specified in 9.2.—end note ]

And let's see a few examples.

// empty classes have standard-layout
struct StandardLayout1 {};

struct StandardLayout2 {
    int x;
};

struct StandardLayout3 {
private: // both are private, so it's ok
    int x;
    int y;
};

struct StandardLayout4 : StandardLayout1 {
    int x;
    int y;

    void f(); // perfectly fine to have non-virtual functions
};

struct StandardLayout5 : StandardLayout1 {
    int x;
    StandardLayout1 y; // can have members of base type if they're not the first
};

struct StandardLayout6 : StandardLayout1, StandardLayout5 {
    // can use multiple inheritance as long only
    // one class in the hierarchy has non-static data members
};

struct StandardLayout7 {
    int x;
    int y;
    StandardLayout7(int x, int y) : x(x), y(y) {} // user-provided ctors are ok
};

struct StandardLayout8 {
public:
    StandardLayout8(int x) : x(x) {} // user-provided ctors are ok
// ok to have non-static data members and other members with different access
private:
    int x;
};

struct StandardLayout9 {
    int x;
    static NonStandardLayout1 y; // no restrictions on static members
};

struct NonStandardLayout1 {
    virtual f(); // cannot have virtual functions
};

struct NonStandardLayout2 {
    NonStandardLayout1 X; // has non-standard-layout member
};

struct NonStandardLayout3 : StandardLayout1 {
    StandardLayout1 x; // first member cannot be of the same type as base
};

struct NonStandardLayout4 : StandardLayout3 {
    int z; // more than one class has non-static data members
};

struct NonStandardLayout5 : NonStandardLayout3 {}; // has a non-standard-layout base class

Conclusion

With these new rules a lot more types can be PODs now. And even if a type is not POD, we can take advantage of some of the POD properties separately (if it is only one of trivial or standard-layout).

The standard library has traits to test these properties in the header <type_traits>:

template <typename T>
struct std::is_pod;
template <typename T>
struct std::is_trivial;
template <typename T>
struct std::is_trivially_copyable;
template <typename T>
struct std::is_standard_layout;

remove space between paragraph and unordered list

p, ul{
     padding:0; 
     margin:0;
}

If that's not what your looking for you'll have to be more specific

Adding data attribute to DOM

to get the text from a

<option value="1" data-sigla="AC">Acre</option>

uf = $("#selectestado option:selected").attr('data-sigla');

How do you specify a different port number in SQL Management Studio?

Using the client manager affects all connections or sets a client machine specific alias.

Use the comma as above: this can be used in an app.config too

It's probably needed if you have firewalls between you and the server too...

Can I set an unlimited length for maxJsonLength in web.config?

The question really is whether you really need to return 17k records? How are you planning to handle all the data in the browser? The users are not going to scroll through 17000 rows anyway.

A better approach is to retrieve only a "top few" records and load more as required.

How do I create a file at a specific path?

I recommend using the os module to avoid trouble in cross-platform. (windows,linux,mac)

Cause if the directory doesn't exists, it will return an exception.

import os

filepath = os.path.join('c:/your/full/path', 'filename')
if not os.path.exists('c:/your/full/path'):
    os.makedirs('c:/your/full/path')
f = open(filepath, "a")

If this will be a function for a system or something, you can improve it by adding try/except for error control.

How to insert spaces/tabs in text using HTML/CSS

Alternatively referred to as a fixed space or hard space, non-breaking space (NBSP) is used in programming and word processing to create a space in a line that cannot be broken by word wrap.

With HTML,   allows you to create multiple spaces that are visible on a web page and not only in the source code.

How do I plot in real-time in a while loop using matplotlib?

Here is a version that I got to work on my system.

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

def makeFig():
    plt.scatter(xList,yList) # I think you meant this

plt.ion() # enable interactivity
fig=plt.figure() # make a figure

xList=list()
yList=list()

for i in np.arange(50):
    y=np.random.random()
    xList.append(i)
    yList.append(y)
    drawnow(makeFig)
    #makeFig()      The drawnow(makeFig) command can be replaced
    #plt.draw()     with makeFig(); plt.draw()
    plt.pause(0.001)

The drawnow(makeFig) line can be replaced with a makeFig(); plt.draw() sequence and it still works OK.

how to properly display an iFrame in mobile safari

I have put @Sharon's code together into the following, which works for me on the iPad with two-finger scrolling. The only thing you should have to change to get it working is the src attribute on the iframe (I used a PDF document).

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>Pdf Scrolling in mobile Safari</title>
</head>
<body>
<div id="scroller" style="height: 400px; width: 100%; overflow: auto;">
<iframe height="100%" id="iframe" scrolling="no" width="100%" id="iframe" src="data/testdocument.pdf" />
</div>
<script type="text/javascript">
    setTimeout(function () {
        var startY = 0;
        var startX = 0;
        var b = document.body;
        b.addEventListener('touchstart', function (event) {
            parent.window.scrollTo(0, 1);
            startY = event.targetTouches[0].pageY;
            startX = event.targetTouches[0].pageX;
        });
        b.addEventListener('touchmove', function (event) {
            event.preventDefault();
            var posy = event.targetTouches[0].pageY;
            var h = parent.document.getElementById("scroller");
            var sty = h.scrollTop;

            var posx = event.targetTouches[0].pageX;
            var stx = h.scrollLeft;
            h.scrollTop = sty - (posy - startY);
            h.scrollLeft = stx - (posx - startX);
            startY = posy;
            startX = posx;
        });
    }, 1000);
    </script>
</body>
</html>

Difference between Statement and PreparedStatement

Another characteristic of Prepared or Parameterized Query: Reference taken from this article.

This statement is one of features of the database system in which same SQL statement executes repeatedly with high efficiency. The prepared statements are one kind of the Template and used by application with different parameters.

The statement template is prepared and sent to the database system and database system perform parsing, compiling and optimization on this template and store without executing it.

Some of parameter like, where clause is not passed during template creation later application, send these parameters to the database system and database system use template of SQL Statement and executes as per request.

Prepared statements are very useful against SQL Injection because the application can prepare parameter using different techniques and protocols.

When the number of data is increasing and indexes are changing frequently at that time Prepared Statements might be fail because in this situation require a new query plan.

AngularJS ui-router login authentication

I wanted to share another solution working with the ui router 1.0.0.X

As you may know, stateChangeStart and stateChangeSuccess are now deprecated. https://github.com/angular-ui/ui-router/issues/2655

Instead you should use $transitions http://angular-ui.github.io/ui-router/1.0.0-alpha.1/interfaces/transition.ihookregistry.html

This is how I achieved it:

First I have and AuthService with some useful functions

angular.module('myApp')

        .factory('AuthService',
                ['$http', '$cookies', '$rootScope',
                    function ($http, $cookies, $rootScope) {
                        var service = {};

                        // Authenticates throug a rest service
                        service.authenticate = function (username, password, callback) {

                            $http.post('api/login', {username: username, password: password})
                                    .success(function (response) {
                                        callback(response);
                                    });
                        };

                        // Creates a cookie and set the Authorization header
                        service.setCredentials = function (response) {
                            $rootScope.globals = response.token;

                            $http.defaults.headers.common['Authorization'] = 'Bearer ' + response.token;
                            $cookies.put('globals', $rootScope.globals);
                        };

                        // Checks if it's authenticated
                        service.isAuthenticated = function() {
                            return !($cookies.get('globals') === undefined);
                        };

                        // Clear credentials when logout
                        service.clearCredentials = function () {
                            $rootScope.globals = undefined;
                            $cookies.remove('globals');
                            $http.defaults.headers.common.Authorization = 'Bearer ';
                        };

                        return service;
                    }]);

Then I have this configuration:

angular.module('myApp', [
    'ui.router',
    'ngCookies'
])
        .config(['$stateProvider', '$urlRouterProvider',
            function ($stateProvider, $urlRouterProvider) {
                $urlRouterProvider.otherwise('/resumen');
                $stateProvider
                        .state("dashboard", {
                            url: "/dashboard",
                            templateUrl: "partials/dashboard.html",
                            controller: "dashCtrl",
                            data: {
                                authRequired: true
                            }
                        })
                        .state("login", {
                            url: "/login",
                            templateUrl: "partials/login.html",
                            controller: "loginController"
                        })
            }])

        .run(['$rootScope', '$transitions', '$state', '$cookies', '$http', 'AuthService',
            function ($rootScope, $transitions, $state, $cookies, $http, AuthService) {

                // keep user logged in after page refresh
                $rootScope.globals = $cookies.get('globals') || {};
                $http.defaults.headers.common['Authorization'] = 'Bearer ' + $rootScope.globals;

                $transitions.onStart({
                    to: function (state) {
                        return state.data != null && state.data.authRequired === true;
                    }
                }, function () {
                    if (!AuthService.isAuthenticated()) {
                        return $state.target("login");
                    }
                });
            }]);

You can see that I use

data: {
   authRequired: true
}

to mark the state only accessible if is authenticated.

then, on the .run I use the transitions to check the autheticated state

$transitions.onStart({
    to: function (state) {
        return state.data != null && state.data.authRequired === true;
    }
}, function () {
    if (!AuthService.isAuthenticated()) {
        return $state.target("login");
    }
});

I build this example using some code found on the $transitions documentation. I'm pretty new with the ui router but it works.

Hope it can helps anyone.

Numpy where function multiple conditions

This should work:

dists[((dists >= r) & (dists <= r+dr))]

The most elegant way~~

Google maps Marker Label with multiple characters

First of all, Thanks to code author!

I found the below link while googling and it is very simple and works best. Would never fail unless SVG is deprecated.

https://codepen.io/moistpaint/pen/ywFDe/

There is some js loading error in the code here but its perfectly working on the codepen.io link provided.

_x000D_

var mapOptions = {_x000D_
    zoom: 16,_x000D_
    center: new google.maps.LatLng(-37.808846, 144.963435)_x000D_
  };_x000D_
  map = new google.maps.Map(document.getElementById('map-canvas'),_x000D_
      mapOptions);_x000D_
_x000D_
_x000D_
var pinz = [_x000D_
    {_x000D_
        'location':{_x000D_
            'lat' : -37.807817,_x000D_
            'lon' : 144.958377_x000D_
        },_x000D_
        'lable' : 2_x000D_
    },_x000D_
    {_x000D_
        'location':{_x000D_
            'lat' : -37.807885,_x000D_
            'lon' : 144.965415_x000D_
        },_x000D_
        'lable' : 42_x000D_
    },_x000D_
    {_x000D_
        'location':{_x000D_
            'lat' : -37.811377,_x000D_
            'lon' : 144.956596_x000D_
        },_x000D_
        'lable' : 87_x000D_
    },_x000D_
    {_x000D_
        'location':{_x000D_
            'lat' : -37.811293,_x000D_
            'lon' : 144.962883_x000D_
        },_x000D_
        'lable' : 145_x000D_
    },_x000D_
    {_x000D_
        'location':{_x000D_
            'lat' : -37.808089,_x000D_
            'lon' : 144.962089_x000D_
        },_x000D_
        'lable' : 999_x000D_
    },_x000D_
];_x000D_
_x000D_
 _x000D_
_x000D_
for(var i = 0; i <= pinz.length; i++){_x000D_
   var image = 'data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2238%22%20height%3D%2238%22%20viewBox%3D%220%200%2038%2038%22%3E%3Cpath%20fill%3D%22%23808080%22%20stroke%3D%22%23ccc%22%20stroke-width%3D%22.5%22%20d%3D%22M34.305%2016.234c0%208.83-15.148%2019.158-15.148%2019.158S3.507%2025.065%203.507%2016.1c0-8.505%206.894-14.304%2015.4-14.304%208.504%200%2015.398%205.933%2015.398%2014.438z%22%2F%3E%3Ctext%20transform%3D%22translate%2819%2018.5%29%22%20fill%3D%22%23fff%22%20style%3D%22font-family%3A%20Arial%2C%20sans-serif%3Bfont-weight%3Abold%3Btext-align%3Acenter%3B%22%20font-size%3D%2212%22%20text-anchor%3D%22middle%22%3E' + pinz[i].lable + '%3C%2Ftext%3E%3C%2Fsvg%3E';_x000D_
_x000D_
  _x000D_
   var myLatLng = new google.maps.LatLng(pinz[i].location.lat, pinz[i].location.lon);_x000D_
   var marker = new google.maps.Marker({_x000D_
      position: myLatLng,_x000D_
      map: map,_x000D_
      icon: image_x000D_
  });_x000D_
}

_x000D_

html, body, #map-canvas {_x000D_
  height: 100%;_x000D_
  margin: 0px;_x000D_
  padding: 0px_x000D_
}

_x000D_

<div id="map-canvas"></div>_x000D_
<script async defer src="https://maps.googleapis.com/maps/api/js?key=AIzaSyDtc3qowwB96ObzSu2vvjEoM2pVhZRQNSA&signed_in=true&callback=initMap&libraries=drawing,places"></script>

_x000D_

You just need to uri-encode your SVG html and replace the one in the image variable after "data:image/svg+xml" in the for loop.

For uri encoding you can use uri-encoder-decoder

You can decode the existing svg code first to get a better understanding of what is written.

Get Bitmap attached to ImageView

This will get you a Bitmap from the ImageView. Though, it is not the same bitmap object that you've set. It is a new one.

imageView.buildDrawingCache();
Bitmap bitmap = imageView.getDrawingCache();

=== EDIT ===

 imageView.setDrawingCacheEnabled(true);
 imageView.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), 
                   MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
 imageView.layout(0, 0, 
                  imageView.getMeasuredWidth(), imageView.getMeasuredHeight()); 
 imageView.buildDrawingCache(true);
 Bitmap bitmap = Bitmap.createBitmap(imageView.getDrawingCache());
 imageView.setDrawingCacheEnabled(false);

Adding a slide effect to bootstrap dropdown

I don't know if I can bump this thread, but I figured out a quick fix for the visual bug that happens when the open class is removed too fast. Basically, all there is to it is to add an OnComplete function inside the slideUp event and reset all active classes and attributes. Goes something like this:

Here is the result: Bootply example

Javascript/Jquery:

$(function(){
    // ADD SLIDEDOWN ANIMATION TO DROPDOWN //
    $('.dropdown').on('show.bs.dropdown', function(e){
        $(this).find('.dropdown-menu').first().stop(true, true).slideDown();
    });

    // ADD SLIDEUP ANIMATION TO DROPDOWN //
    $('.dropdown').on('hide.bs.dropdown', function(e){
        e.preventDefault();
        $(this).find('.dropdown-menu').first().stop(true, true).slideUp(400, function(){
            //On Complete, we reset all active dropdown classes and attributes
            //This fixes the visual bug associated with the open class being removed too fast
            $('.dropdown').removeClass('show');
            $('.dropdown-menu').removeClass('show');
            $('.dropdown').find('.dropdown-toggle').attr('aria-expanded','false');
        });
    });
});

How to convert a color integer to a hex String in Android?

String int2string = Integer.toHexString(INTEGERColor); //to ARGB
String HtmlColor = "#"+ int2string.substring(int2string.length() - 6, int2string.length()); // a stupid way to append your color

Best dynamic JavaScript/JQuery Grid

My suggestion for dynamic JQuery Grid are below.

http://reconstrukt.com/ingrid/

https://github.com/mleibman/SlickGrid

http://www.datatables.net/index

Best one is :

DataTables is a plug-in for the jQuery Javascript library. It is a highly flexible tool, based upon the foundations of progressive enhancement, which will add advanced interaction controls to any HTML table.

Variable length pagination

On-the-fly filtering

Multi-column sorting with data type detection

Smart handling of column widths

Display data from almost any data source

DOM, Javascript array, Ajax file and server-side processing (PHP, C#, Perl, Ruby, AIR, Gears etc)

Scrolling options for table viewport

Fully internationalisable

jQuery UI ThemeRoller support

Rock solid - backed by a suite of 2600+ unit tests

Wide variety of plug-ins inc. TableTools, FixedColumns, KeyTable and more

Dynamic creation of tables

Ajax auto loading of data

Custom DOM positioning

Single column filtering

Alternative pagination types

Non-destructive DOM interaction

Sorting column(s) highlighting

Advanced data source options

Extensive plug-in support

Sorting, type detection, API functions, pagination and filtering

Fully themeable by CSS

Solid documentation

110+ pre-built examples

Full support for Adobe AIR

A completely free agile software process tool

Try http://www.icescrum.org . It is free to use. And it has lot of cool features. Perfect for scrum teams.

Check whether IIS is installed or not?

go to Start->Run type inetmgr and press OK. If you get an IIS configuration screen. It is installed, otherwise it isn't.

You can also check ControlPanel->Add Remove Programs, Click Add Remove Windows Components and look for IIS in the list of installed components.

EDIT

To Reinstall IIS.

Control Panel -> Add Remove Programs -> Click Add Remove Windows Components
Uncheck IIS box

Click next and follow prompts to UnInstall IIS. Insert your windows disc into the appropriate drive.

Control Panel -> Add Remove Programs -> Click Add Remove Windows Components
Check IIS box

Click next and follow prompts to Install IIS.

Getting one value from a tuple

General

Single elements of a tuple a can be accessed -in an indexed array-like fashion-

via a[0], a[1], ... depending on the number of elements in the tuple.

Example

If your tuple is a=(3,"a")

a[0] yields 3,
a[1] yields "a"

Concrete answer to question

def tup():
  return (3, "hello")

tup() returns a 2-tuple.

In order to "solve"

i = 5 + tup()  # I want to add just the three

you select the 3 by

tup()[0|    #first element

so in total

i = 5 + tup()[0]

Alternatives

Go with namedtuple that allows you to access tuple elements by name (and by index). Details at https://docs.python.org/3/library/collections.html#collections.namedtuple

>>> import collections
>>> MyTuple=collections.namedtuple("MyTuple", "mynumber, mystring")
>>> m = MyTuple(3, "hello")
>>> m[0]
3
>>> m.mynumber
3
>>> m[1]
'hello'
>>> m.mystring
'hello'

PHP ternary operator vs null coalescing operator

If you use the shortcut ternary operator like this, it will cause a notice if $_GET['username'] is not set:

$val = $_GET['username'] ?: 'default';

So instead you have to do something like this:

$val = isset($_GET['username']) ? $_GET['username'] : 'default';

The null coalescing operator is equivalent to the above statement, and will return 'default' if $_GET['username'] is not set or is null:

$val = $_GET['username'] ?? 'default';

Note that it does not check truthiness. It checks only if it is set and not null.

You can also do this, and the first defined (set and not null) value will be returned:

$val = $input1 ?? $input2 ?? $input3 ?? 'default';

Now that is a proper coalescing operator.

Is there "\n" equivalent in VBscript?

As David and Remou pointed out, vbCrLf if you want a carriage-return-linefeed combination. Otherwise, Chr(13) and Chr(10) (although some VB-derivatives have vbCr and vbLf; VBScript may well have those, worth checking before using Chr).

How to set UICollectionViewCell Width and Height programmatically

in Swift3 and Swift4 you can change cell size by adding UICollectionViewDelegateFlowLayout and implementing it's like this :

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        return CGSize(width: 100, height: 100)
    }

or if create UICollectionView programmatically you can do it like this :

    let layout = UICollectionViewFlowLayout()
                    layout.scrollDirection = .horizontal //this is for direction
                    layout.minimumInteritemSpacing = 0 // this is for spacing between cells
                    layout.itemSize = CGSize(width: view.frame.width, height: view.frame.height) //this is for cell size
let collectionView = UICollectionView(frame: self.view.bounds, collectionViewLayout: layout)

python numpy ValueError: operands could not be broadcast together with shapes

Convert the arrays to matrices, and then perform the multiplication.

X = np.matrix(X)

y = np.matrix(y)

X*y

Bootstrap modal in React.js

You can try this modal:https://github.com/xue2han/react-dynamic-modal It is stateless and can be rendered only when needed.So it is very easy to use.Just like this:

    class MyModal extends Component{
       render(){
          const { text } = this.props;
          return (
             <Modal
                onRequestClose={this.props.onRequestClose}
                openTimeoutMS={150}
                closeTimeoutMS={150}
                style={customStyle}>
                <h1>What you input : {text}</h1>
                <button onClick={ModalManager.close}>Close Modal</button>
             </Modal>
          );
       }
    }

    class App extends Component{
        openModal(){
           const text = this.refs.input.value;
           ModalManager.open(<MyModal text={text} onRequestClose={() => true}/>);
        }
        render(){
           return (
              <div>
                <div><input type="text" placeholder="input something" ref="input" /></div>
                <div><button type="button" onClick={this.openModal.bind(this)}>Open Modal </button> </div>
              </div>
           );
        }
    }

    ReactDOM.render(<App />,document.getElementById('main'));

show loading icon until the page is load?

HTML

<body>
    <div id="load"></div>
    <div id="contents">
          jlkjjlkjlkjlkjlklk
    </div>
</body>

document.onreadystatechange = function () {
  var state = document.readyState
  if (state == 'interactive') {
       document.getElementById('contents').style.visibility="hidden";
  } else if (state == 'complete') {
      setTimeout(function(){
         document.getElementById('interactive');
         document.getElementById('load').style.visibility="hidden";
         document.getElementById('contents').style.visibility="visible";
      },1000);
  }
}

CSS

#load{
    width:100%;
    height:100%;
    position:fixed;
    z-index:9999;
    background:url("https://www.creditmutuel.fr/cmne/fr/banques/webservices/nswr/images/loading.gif") no-repeat center center rgba(0,0,0,0.25)
}

Note:
you wont see any loading gif if your page is loaded fast, so use this code on a page with high loading time, and i also recommend to put your js on the bottom of the page.

DEMO

http://jsfiddle.net/6AcAr/ - with timeout(only for demo)
http://jsfiddle.net/47PkH/ - no timeout(use this for actual page)

update

http://jsfiddle.net/d9ngT/

selecting an entire row based on a variable excel vba

One needs to make sure the space between the variables and '&' sign. Check the image. (Red one showing invalid commands)

The correct solution is

Dim copyToRow: copyToRow = 5      
Rows(copyToRow & ":" & copyToRow).Select

Why doesn't margin:auto center an image?

<div style="text-align:center;">
    <img src="queuedError.jpg" style="margin:auto; width:200px;" />
</div>

Stick button to right side of div

Another solution: change margins. Depending on the siblings of the button, display should be modified.

button {
    display:      block;
    margin-left:  auto;
    margin-right: 0;
}

difference between System.out.println() and System.err.println()

this answer most probably help you it is so much easy System.err and System.out both are the same both are defined in System class as reference variable of PrintStream class as public final static PrintStream out = null; and public final static PrintStream err = null;

means both are ref. variable of PrintStream class. normally System.err is used for printing an error messages, which increase the redability for the programmer.

A minor difference comes in both when we are working with Redirection operator.

How to run a cron job on every Monday, Wednesday and Friday?

Use this command to add job

crontab -e

In this format:

0 19 * * 1,3,5 /path to your file/file.php

How do I align a number like this in C?

[I realize this question is a million years old, but there is a deeper question (or two) at its heart, about OP, the pedagogy of programming, and about assumption-making.]

A few people, including a mod, have suggested this is impossible. And, in some--including the most obvious--contexts, it is. But it's interesting to see that that wasn't immediately obvious to the OP.

The impossibility assumes that the contex is running an executable compiled from C on a line-oriented text console (e.g., console+sh or X-term+csh or Terminal+bash), which is a very reasonable assumption. But the fact that the "right" answer ("%8d") wasn't good enough for OP while also being non-obvious suggests that there's a pretty big can of worms nearby...

Consider Curses (and its many variants). In it, you can navigate the "screen", and "move" the cursor around, and "repaint" portions (windows) of text-based output. In a Curses context, it absolutely would be possible to do; i.e., dynamically resize a "window" to accommodate a larger number. But even Curses is just a screen "painting" abstraction. No one suggested it, and probably rightfully so, because a Curses implementation in C doesn't mean it's "strictly C". Fine.

But what does this really mean? In order for the response: "it's impossible" to be correct, it would mean that we're saying something about the runtime system. In other words, this isn't theoretical, (as in, "How do I sort a statically-allocated array of ints?"), which can be explained as a "closed system" that totally ignores any aspect of the runtime.

But, in this case, we have I/O: specifically, the implementation of printf(). But that's where there's an opportunity to have said something more interesting in response (even though, admittedly, the asker was probably not digging quite this deep).

Suppose we use a different set of assumptions. Suppose OP is reasonably "clever" and understands that it would not be possible to to edit previous lines on a line-oriented stream (how would you correct the horizontal position of a character output by a line-printer??). Suppose also, that OP isn't just a kid working on a homework assignment and not realizing it was a "trick" question, intended to tease out an exploration of the meaning of "stream abstraction". Further, let's suppose OP was wondering: "Wait...If C's runtime environment supports the idea of STDOUT--and if STDOUT is just an abstraction--why isn't it just as reasonable to have a terminal abstraction that 1) can vertically scroll but 2) supports a positionable cursor? Both are moving text on a screen."

Because if that were the question we're trying to answer, then you'd only have to look as far as:

ANSI Escape Codes

to see that:

Almost all manufacturers of video terminals added vendor-specific escape sequences to perform operations such as placing the cursor at arbitrary positions on the screen. One example is the VT52 terminal, which allowed the cursor to be placed at an x,y location on the screen by sending the ESC character, a Y character, and then two characters representing with numerical values equal to the x,y location plus 32 (thus starting at the ASCII space character and avoiding the control characters). The Hazeltine 1500 had a similar feature, invoked using ~, DC1 and then the X and Y positions separated with a comma. While the two terminals had identical functionality in this regard, different control sequences had to be used to invoke them.

The first popular video terminal to support these sequences was the Digital VT100, introduced in 1978. This model was very successful in the market, which sparked a variety of VT100 clones, among the earliest and most popular of which was the much more affordable Zenith Z-19 in 1979. Others included the Qume QVT-108, Televideo TVI-970, Wyse WY-99GT as well as optional "VT100" or "VT103" or "ANSI" modes with varying degrees of compatibility on many other brands. The popularity of these gradually led to more and more software (especially bulletin board systems and other online services) assuming the escape sequences worked, leading to almost all new terminals and emulator programs supporting them.

It has been possible, as early as 1978. C itself was "born" in 1972, and the K&R version was established in 1978. If "ANSI" escape sequences were around at that time, then there is an answer "in C" if we're willing to also stipulate: "Well, assuming your terminal is VT100-capable." Incidentally, the consoles which don't support ANSI escapes? You guessed it: Windows & DOS consoles. But on almost every other platform (Unices, Vaxen, Mac OS, Linux) you can expect to.

TL;DR - There is no reasonable answer that can be given without stating assumptions about the runtime environment. Since most runtimes (unless you're using desktop-computer-market-share-of-the-80's-and-90's to calculate 'most') would have, (since the time of the VT-52!), then I don't think it's entirely justified to say that it's impossible--just that in order for it to be possible, it's an entire different order of magnitude of work, and not as simple as %8d...which it kinda seemed like the OP knew about.

We just have to clarify the assumptions.

And lest one thinks that I/O is exceptional, i.e., the only time we need to think about the runtime, (or even the hardware), just dig into IEEE 754 Floating Point exception handling. For those interested:

Intel Floating Point Case Study

According to Professor William Kahan, University of California at Berkeley, a classic case occurred in June 1996. A satellite-lifting rocket named Ariane 5 turned cartwheels shortly after launch and scattered itself and a payload worth over half a billion dollars over a marsh in French Guiana. Kahan found the disaster could be blamed upon a programming language that disregarded the default exception-handling specifications in IEEE 754. Upon launch, sensors reported acceleration so strong that it caused a conversion-to-integer overflow in software intended for recalibration of the rocket’s inertial guidance while on the launching pad.

Recommended way to insert elements into map

To quote:

Because map containers do not allow for duplicate key values, the insertion operation checks for each element inserted whether another element exists already in the container with the same key value, if so, the element is not inserted and its mapped value is not changed in any way.

So insert will not change the value if the key already exists, the [] operator will.

EDIT:

This reminds me of another recent question - why use at() instead of the [] operator to retrieve values from a vector. Apparently at() throws an exception if the index is out of bounds whereas [] operator doesn't. In these situations it's always best to look up the documentation of the functions as they will give you all the details. But in general, there aren't (or at least shouldn't be) two functions/operators that do the exact same thing.

My guess is that, internally, insert() will first check for the entry and afterwards itself use the [] operator.

Disabling and enabling a html input button

While not directly related to the question, if you hop onto this question looking to disable something other than the typical input elements button, input, textarea, the syntax won't work.

To disable a div or a span, use setAttribute

document.querySelector('#somedivorspan').setAttribute('disabled', true);

P.S: Gotcha, only call this if you intend to disable. A bug in chrome Version 83 causes this to always disable even when the second parameter is false.

Creating a new DOM element from an HTML string using built-in DOM methods or Prototype

I added a Document prototype that creates an element from string:

Document.prototype.createElementFromString = function (str) {
    const element = new DOMParser().parseFromString(str, 'text/html');
    const child = element.documentElement.querySelector('body').firstChild;
    return child;
};

Add image to layout in ruby on rails

When using the new ruby, the image folder will go to asset folder on folder app

after placing your images in image folder, use

<%=image_tag("example_image.png", alt: "Example Image")%>

npm behind a proxy fails with status 403

On windows10, create this file. Worked for me.

Use of Application.DoEvents()

Yes.

However, if you need to use Application.DoEvents, this is mostly an indication of a bad application design. Perhaps you'd like to do some work in a separate thread instead?

UICollectionView - dynamic cell height?

Follow bolnad answer up to Step 4.

Then make it simpler by replacing all the other steps with:

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {

    // Configure your cell
    sizingNibNew.configureCell(data as! CustomCellData, delegate: self)

    // We use the full width minus insets
    let width = collectionView.frame.size.width - collectionView.sectionInset.left - collectionView.sectionInset.right

    // Constrain our cell to this width 
    let height = sizingNibNew.systemLayoutSizeFitting(CGSize(width: width, height: .infinity), withHorizontalFittingPriority: UILayoutPriorityRequired, verticalFittingPriority: UILayoutPriorityFittingSizeLevel).height

    return CGSize(width: width, height: height)
}

fatal: The current branch master has no upstream branch

on a very simple side, once you have other branches, you can't just use for pushing a branch

git push

But you need to specify the branch now, even if you have checkout the branch you want to push, so

git push origin <feature_branch>

Where can be even the master branch

How can I add an element after another element?

Solved jQuery: Add element after another element

<script>
$( "p" ).append( "<strong>Hello</strong>" );
</script>

<script type="text/javascript"> 
jQuery(document).ready(function(){
jQuery ( ".sidebar_cart" ) .append( "<a href='http://#'>Continue Shopping</a>" );
});
</script>

How to remove outliers from a dataset

The boxplot function returns the values used to do the plotting (which is actually then done by bxp():

bstats <- boxplot(count ~ spray, data = InsectSprays, col = "lightgray") 
#need to "waste" this plot
bstats$out <- NULL
bstats$group <- NULL
bxp(bstats)  # this will plot without any outlier points

I purposely did not answer the specific question because I consider it statistical malpractice to remove "outliers". I consider it acceptable practice to not plot them in a boxplot, but removing them just because they exceed some number of standard deviations or some number of inter-quartile widths is a systematic and unscientific mangling of the observational record.

Circle button css

HTML:

<div class="bool-answer">
  <div class="answer">Nej</div>
</div>

CSS:

.bool-answer {
    border-radius: 50%;
    width: 100px;
    height: 100px;
    display: flex;
    justify-content: center;
    align-items: center;
}

Delete a dictionary item if the key exists

You can use dict.pop:

 mydict.pop("key", None)

Note that if the second argument, i.e. None is not given, KeyError is raised if the key is not in the dictionary. Providing the second argument prevents the conditional exception.

How to do a background for a label will be without color?

You are right. but here is the simplest way for making the back color of the label transparent In the properties window of that label select Web.. In Web select Transparent :)

sorting a List of Map<String, String>

The following code works perfectly

public Comparator<Map<String, String>> mapComparator = new Comparator<Map<String, String>>() {
    public int compare(Map<String, String> m1, Map<String, String> m2) {
        return m1.get("name").compareTo(m2.get("name"));
    }
}

Collections.sort(list, mapComparator);

But your maps should probably be instances of a specific class.

Run batch file from Java code

import java.lang.Runtime;

Process run = Runtime.getRuntime().exec("cmd.exe", "/c", "Start", "path of the bat file");

This will work for you and is easy to use.

Asus Zenfone 5 not detected by computer

Install Asus PC Link on your PC available here: https://www.asus.com/ph/support/FAQ/1007320/

Git error: src refspec master does not match any

The quick possible answer: When you first successfully clone an empty git repository, the origin has no master branch. So the first time you have a commit to push you must do:

git push origin master

Which will create this new master branch for you. Little things like this are very confusing with git.

If this didn't fix your issue then it's probably a gitolite-related issue:

Your conf file looks strange. There should have been an example conf file that came with your gitolite. Mine looks like this:

repo    phonegap                                                                                                                                                                           
    RW+     =   myusername otherusername                                                                                                                                               

repo    gitolite-admin                                                                                                                                                                         
    RW+     =   myusername

Please make sure you're setting your conf file correctly.

Gitolite actually replaces the gitolite user's account with a modified shell that doesn't accept interactive terminal sessions. You can see if gitolite is working by trying to ssh into your box using the gitolite user account. If it knows who you are it will say something like "Hi XYZ, you have access to the following repositories: X, Y, Z" and then close the connection. If it doesn't know you, it will just close the connection.

Lastly, after your first git push failed on your local machine you should never resort to creating the repo manually on the server. We need to know why your git push failed initially. You can cause yourself and gitolite more confusion when you don't use gitolite exclusively once you've set it up.

Difference between "read commited" and "repeatable read"

Please note that, the repeatable in repeatable read regards to a tuple, but not to the entire table. In ANSC isolation levels, phantom read anomaly can occur, which means read a table with the same where clause twice may return different return different result sets. Literally, it's not repeatable.

Create new user in MySQL and give it full access to one database

$ mysql -u root -p -e "grant all privileges on dbTest.* to
`{user}`@`{host}` identified by '{long-password}'; flush privileges;"

ignore -p option, if mysql user has no password or just press "[Enter]" button to by-pass. strings surrounded with curly braces need to replaced with actual values.

Redirect Windows cmd stdout and stderr to a single file

You want:

dir > a.txt 2>&1

The syntax 2>&1 will redirect 2 (stderr) to 1 (stdout). You can also hide messages by redirecting to NUL, more explanation and examples on MSDN.

How To Set A JS object property name from a variable

You'll have to use [] notation to set keys dynamically.

var jsonVariable = {};
for(i=1; i<3; i++) {        
 var jsonKey  = i+'name';
 jsonVariable[jsonKey] = 'name1';

}

Now in ES6 you can use object literal syntax to create object keys dynamically, just wrap the variable in []

var key  = i + 'name';
data = {
    [key] : 'name1',
}

jquery UI dialog: how to initialize without a title bar?

This is How it can be done.

Go to themes folder--> base--> open jquery.ui.dialog.css

Find

Followings

if you don't want to display titleBar then simply set display:none as i did in the following.

.ui dialog.ui-dialog .ui-dialog-titlebar 
{
    padding: .4em 1em;
    position: relative;
        display:none;
}

Samilarly for title as well.

.ui-dialog .ui-dialog-title {
    float: left;
    margin: .1em 0;
    white-space: nowrap;
    width: 90%;
    overflow: hidden;
    text-overflow: ellipsis;
    display:none; 
}

Now comes close button you can also set it none or you can set its

.ui-dialog .ui-dialog-titlebar-close {
    position: absolute;
    right: .3em;
    top: 50%;
    width: 21px;
    margin: -10px 0 0 0;
    padding: 1px;
    height: 20px;

   display:none;

}

I did lots of search but nothing then i got this idea in my mind. However this will effect entire application to don't have close button,title bar for dialog but you can overcome this as well by using jquery and adding and setting css via jquery

here is syntax for this

$(".specificclass").css({display:normal})

Programs & Examples On #Microsoft distributed file system

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HTML form do some "action" when hit submit button

How to view the Folder and Files in GAC?

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load iframe in bootstrap modal

Google Play Services Library update and missing symbol @integer/google_play_services_version

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Python Write bytes to file

Center content in responsive bootstrap navbar

Google reCAPTCHA: How to get user response and validate in the server side?

jQuery count number of divs with a certain class?

how to bold words within a paragraph in HTML/CSS?

Bulk Insertion in Laravel using eloquent ORM

Dynamically load JS inside JS

Comparison of Android Web Service and Networking libraries: OKHTTP, Retrofit and Volley

Using JavaScript to display a Blob

Write in body request with HttpClient

Where does Hive store files in HDFS?

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Sending arrays with Intent.putExtra

ld cannot find an existing library

Modify the legend of pandas bar plot

Calling ASP.NET MVC Action Methods from JavaScript

Why is sed not recognizing \t as a tab?

Solution (bash specific)

Explanation

Solution (if you must avoid bash)

Generating Request/Response XML from a WSDL

jQuery checkbox event handling

Typescript: React event types

grep using a character vector with multiple patterns

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Check existence of directory and create if doesn't exist

No newline at end of file

How to get all the AD groups for a particular user?

Array.size() vs Array.length

Remove grid, background color, and top and right borders from ggplot2

How can I exclude one word with grep?

python and sys.argv

Android Crop Center of Bitmap

Create list of single item repeated N times

How to open child forms positioned within MDI parent in VB.NET?

Working copy XXX locked and cleanup failed in SVN

Get index of array element faster than O(n)

Converting bytes to megabytes

Hide Text with CSS, Best Practice?

HTML Table cell background image alignment

How to get the EXIF data from a file using C#

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Default value of function parameter

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In Python, what does dict.pop(a,b) mean?

How to output HTML from JSP <%! ... %> block?

How do I import material design library to Android Studio?

Powershell Execute remote exe with command line arguments on remote computer

Can't access object property, even though it shows up in a console log

How can I get the application's path in a .NET console application?

Getting path relative to the current working directory?

PL/SQL block problem: No data found error

MVVM: Tutorial from start to finish?

Should I write script in the body or the head of the html?

CSS display: inline vs inline-block

Swift: Display HTML data in a label or textView

Matplotlib scatter plot legend

2D scatter plot

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Password Strength Meter

Timeout function if it takes too long to finish

What is the difference between % and %% in a cmd file?

Is there any way to start with a POST request using Selenium?

Disable Copy or Paste action for text box?

Hide Utility Class Constructor : Utility classes should not have a public or default constructor

Deprecated meaning?