Alternative for frames in html5 using iframes

Frames have been deprecated because they caused trouble for url navigation and hyperlinking, because the url would just take to you the index page (with the frameset) and there was no way to specify what was in each of the frame windows. Today, webpages are often generated by server-side technologies such as PHP, ASP.NET, Ruby etc. So instead of using frames, pages can simply be generated by merging a template with content like this:

Template File

<html>
<head>
<title>{insert script variable for title}</title>
</head>

<body>
  <div class="menu">
   {menu items inserted here by server-side scripting}
  </div>
  <div class="main-content">
   {main content inserted here by server-side scripting}
  </div>
</body>
</html>

If you don't have full support for a server-side scripting language, you could also use server-side includes (SSI). This will allow you to do the same thing--i.e. generate a single web page from multiple source documents.

But if you really just want to have a section of your webpage be a separate "window" into which you can load other webpages that are not necessarily located on your own server, you will have to use an iframe.

You could emulate your example like this:

Frames Example

<html>
<head>
  <title>Frames Test</title>
  <style>
   .menu {
      float:left;
      width:20%;
      height:80%;
    }
    .mainContent {
      float:left;
      width:75%;
      height:80%;
    }
  </style>
</head>
<body>
  <iframe class="menu" src="menu.html"></iframe>
  <iframe class="mainContent" src="events.html"></iframe>
</body>
</html>

There are probably better ways to achieve the layout. I've used the CSS float attribute, but you could use tables or other methods as well.

Elastic Search: how to see the indexed data

Following @JanKlimo example, on terminal all you have to do is:

to see all the Index: $ curl -XGET 'http://127.0.0.1:9200/_cat/indices?v'

to see content of Index products_development_20160517164519304: $ curl -XGET 'http://127.0.0.1:9200/products_development_20160517164519304/_search?pretty=1'

Encrypt & Decrypt using PyCrypto AES 256

It's little late but i think this will be very helpful. No one mention about use scheme like PKCS#7 padding. You can use it instead the previous functions to pad(when do encryption) and unpad(when do decryption).i will provide the full Source Code below.

import base64
import hashlib
from Crypto import Random
from Crypto.Cipher import AES
import pkcs7
class Encryption:

    def __init__(self):
        pass

    def Encrypt(self, PlainText, SecurePassword):
        pw_encode = SecurePassword.encode('utf-8')
        text_encode = PlainText.encode('utf-8')

        key = hashlib.sha256(pw_encode).digest()
        iv = Random.new().read(AES.block_size)

        cipher = AES.new(key, AES.MODE_CBC, iv)
        pad_text = pkcs7.encode(text_encode)
        msg = iv + cipher.encrypt(pad_text)

        EncodeMsg = base64.b64encode(msg)
        return EncodeMsg

    def Decrypt(self, Encrypted, SecurePassword):
        decodbase64 = base64.b64decode(Encrypted.decode("utf-8"))
        pw_encode = SecurePassword.decode('utf-8')

        iv = decodbase64[:AES.block_size]
        key = hashlib.sha256(pw_encode).digest()

        cipher = AES.new(key, AES.MODE_CBC, iv)
        msg = cipher.decrypt(decodbase64[AES.block_size:])
        pad_text = pkcs7.decode(msg)

        decryptedString = pad_text.decode('utf-8')
        return decryptedString

import StringIO
import binascii


def decode(text, k=16):
    nl = len(text)
    val = int(binascii.hexlify(text[-1]), 16)
    if val > k:
        raise ValueError('Input is not padded or padding is corrupt')

    l = nl - val
    return text[:l]


def encode(text, k=16):
    l = len(text)
    output = StringIO.StringIO()
    val = k - (l % k)
    for _ in xrange(val):
        output.write('%02x' % val)
    return text + binascii.unhexlify(output.getvalue())

Most concise way to test string equality (not object equality) for Ruby strings or symbols?

According to http://www.techotopia.com/index.php/Ruby_String_Concatenation_and_Comparison

Doing either

mystring == yourstring

mystring.eql? yourstring

Are equivalent.

How to change TIMEZONE for a java.util.Calendar/Date

In Java, Dates are internally represented in UTC milliseconds since the epoch (so timezones are not taken into account, that's why you get the same results, as getTime() gives you the mentioned milliseconds).
In your solution:

Calendar cSchedStartCal = Calendar.getInstance(TimeZone.getTimeZone("GMT"));
long gmtTime = cSchedStartCal.getTime().getTime();

long timezoneAlteredTime = gmtTime + TimeZone.getTimeZone("Asia/Calcutta").getRawOffset();
Calendar cSchedStartCal1 = Calendar.getInstance(TimeZone.getTimeZone("Asia/Calcutta"));
cSchedStartCal1.setTimeInMillis(timezoneAlteredTime);

you just add the offset from GMT to the specified timezone ("Asia/Calcutta" in your example) in milliseconds, so this should work fine.

Another possible solution would be to utilise the static fields of the Calendar class:

//instantiates a calendar using the current time in the specified timezone
Calendar cSchedStartCal = Calendar.getInstance(TimeZone.getTimeZone("GMT"));
//change the timezone
cSchedStartCal.setTimeZone(TimeZone.getTimeZone("Asia/Calcutta"));
//get the current hour of the day in the new timezone
cSchedStartCal.get(Calendar.HOUR_OF_DAY);

Refer to stackoverflow.com/questions/7695859/ for a more in-depth explanation.

ld cannot find an existing library

It is Debian convention to separate shared libraries into their runtime components (libmagic1: /usr/lib/libmagic.so.1 ? libmagic.so.1.0.0) and their development components (libmagic-dev: /usr/lib/libmagic.so ? …).

Because the library's soname is libmagic.so.1, that's the string that gets embedded into the executable so that's the file that is loaded when the executable is run.

However, because the library is specified as -lmagic to the linker, it looks for libmagic.so, which is why it is needed for development.

See Diego E. Pettenò: Linkers and names for details on how this all works on Linux.

In short, you should apt-get install libmagic-dev. This will not only give you libmagic.so but also other files necessary for compiling like /usr/include/magic.h.

UITextField text change event

From proper way to do uitextfield text change call back:

I catch the characters sent to a UITextField control something like this:

// Add a "textFieldDidChange" notification method to the text field control.

In Objective-C:

[textField addTarget:self 
              action:@selector(textFieldDidChange:) 
    forControlEvents:UIControlEventEditingChanged];

In Swift:

textField.addTarget(self, action: #selector(textFieldDidChange), for: .editingChanged)

Then in the textFieldDidChange method you can examine the contents of the textField, and reload your table view as needed.

You could use that and put calculateAndUpdateTextFields as your selector.

What is the easiest way to remove the first character from a string?

I kind of favor using something like:

asdf = "[12,23,987,43"
asdf[0] = '' 

p asdf
# >> "12,23,987,43"

I'm always looking for the fastest and most readable way of doing things:

require 'benchmark'

N = 1_000_000

puts RUBY_VERSION

STR = "[12,23,987,43"

Benchmark.bm(7) do |b|
  b.report('[0]') { N.times { "[12,23,987,43"[0] = '' } }
  b.report('sub') { N.times { "[12,23,987,43".sub(/^\[+/, "") } }

  b.report('gsub') { N.times { "[12,23,987,43".gsub(/^\[/, "") } }
  b.report('[1..-1]') { N.times { "[12,23,987,43"[1..-1] } }
  b.report('slice') { N.times { "[12,23,987,43".slice!(0) } }
  b.report('length') { N.times { "[12,23,987,43"[1..STR.length] } }

end

Running on my Mac Pro:

1.9.3
              user     system      total        real
[0]       0.840000   0.000000   0.840000 (  0.847496)
sub       1.960000   0.010000   1.970000 (  1.962767)
gsub      4.350000   0.020000   4.370000 (  4.372801)
[1..-1]   0.710000   0.000000   0.710000 (  0.713366)
slice     1.020000   0.000000   1.020000 (  1.020336)
length    1.160000   0.000000   1.160000 (  1.157882)

Updating to incorporate one more suggested answer:

require 'benchmark'

N = 1_000_000

class String
  def eat!(how_many = 1)
    self.replace self[how_many..-1]
  end

  def first(how_many = 1)
    self[0...how_many]
  end

  def shift(how_many = 1)
    shifted = first(how_many)
    self.replace self[how_many..-1]
    shifted
  end
  alias_method :shift!, :shift
end

class Array
  def eat!(how_many = 1)
    self.replace self[how_many..-1]
  end
end

puts RUBY_VERSION

STR = "[12,23,987,43"

Benchmark.bm(7) do |b|
  b.report('[0]') { N.times { "[12,23,987,43"[0] = '' } }
  b.report('sub') { N.times { "[12,23,987,43".sub(/^\[+/, "") } }

  b.report('gsub') { N.times { "[12,23,987,43".gsub(/^\[/, "") } }
  b.report('[1..-1]') { N.times { "[12,23,987,43"[1..-1] } }
  b.report('slice') { N.times { "[12,23,987,43".slice!(0) } }
  b.report('length') { N.times { "[12,23,987,43"[1..STR.length] } }
  b.report('eat!') { N.times { "[12,23,987,43".eat! } }
  b.report('reverse') { N.times { "[12,23,987,43".reverse.chop.reverse } }
end

Which results in:

2.1.2
              user     system      total        real
[0]       0.300000   0.000000   0.300000 (  0.295054)
sub       0.630000   0.000000   0.630000 (  0.631870)
gsub      2.090000   0.000000   2.090000 (  2.094368)
[1..-1]   0.230000   0.010000   0.240000 (  0.232846)
slice     0.320000   0.000000   0.320000 (  0.320714)
length    0.340000   0.000000   0.340000 (  0.341918)
eat!      0.460000   0.000000   0.460000 (  0.452724)
reverse   0.400000   0.000000   0.400000 (  0.399465)

And another using /^./ to find the first character:

require 'benchmark'

N = 1_000_000

class String
  def eat!(how_many = 1)
    self.replace self[how_many..-1]
  end

  def first(how_many = 1)
    self[0...how_many]
  end

  def shift(how_many = 1)
    shifted = first(how_many)
    self.replace self[how_many..-1]
    shifted
  end
  alias_method :shift!, :shift
end

class Array
  def eat!(how_many = 1)
    self.replace self[how_many..-1]
  end
end

puts RUBY_VERSION

STR = "[12,23,987,43"

Benchmark.bm(7) do |b|
  b.report('[0]') { N.times { "[12,23,987,43"[0] = '' } }
  b.report('[/^./]') { N.times { "[12,23,987,43"[/^./] = '' } }
  b.report('[/^\[/]') { N.times { "[12,23,987,43"[/^\[/] = '' } }
  b.report('sub+') { N.times { "[12,23,987,43".sub(/^\[+/, "") } }
  b.report('sub') { N.times { "[12,23,987,43".sub(/^\[/, "") } }
  b.report('gsub') { N.times { "[12,23,987,43".gsub(/^\[/, "") } }
  b.report('[1..-1]') { N.times { "[12,23,987,43"[1..-1] } }
  b.report('slice') { N.times { "[12,23,987,43".slice!(0) } }
  b.report('length') { N.times { "[12,23,987,43"[1..STR.length] } }
  b.report('eat!') { N.times { "[12,23,987,43".eat! } }
  b.report('reverse') { N.times { "[12,23,987,43".reverse.chop.reverse } }
end

Which results in:

# >> 2.1.5
# >>               user     system      total        real
# >> [0]       0.270000   0.000000   0.270000 (  0.270165)
# >> [/^./]    0.430000   0.000000   0.430000 (  0.432417)
# >> [/^\[/]   0.460000   0.000000   0.460000 (  0.458221)
# >> sub+      0.590000   0.000000   0.590000 (  0.590284)
# >> sub       0.590000   0.000000   0.590000 (  0.596366)
# >> gsub      1.880000   0.010000   1.890000 (  1.885892)
# >> [1..-1]   0.230000   0.000000   0.230000 (  0.223045)
# >> slice     0.300000   0.000000   0.300000 (  0.299175)
# >> length    0.320000   0.000000   0.320000 (  0.325841)
# >> eat!      0.410000   0.000000   0.410000 (  0.409306)
# >> reverse   0.390000   0.000000   0.390000 (  0.393044)

Here's another update on faster hardware and a newer version of Ruby:

2.3.1
              user     system      total        real
[0]       0.200000   0.000000   0.200000 (  0.204307)
[/^./]    0.390000   0.000000   0.390000 (  0.387527)
[/^\[/]   0.360000   0.000000   0.360000 (  0.360400)
sub+      0.490000   0.000000   0.490000 (  0.492083)
sub       0.480000   0.000000   0.480000 (  0.487862)
gsub      1.990000   0.000000   1.990000 (  1.988716)
[1..-1]   0.180000   0.000000   0.180000 (  0.181673)
slice     0.260000   0.000000   0.260000 (  0.266371)
length    0.270000   0.000000   0.270000 (  0.267651)
eat!      0.400000   0.010000   0.410000 (  0.398093)
reverse   0.340000   0.000000   0.340000 (  0.344077)

Why is gsub so slow?

After doing a search/replace, gsub has to check for possible additional matches before it can tell if it's finished. sub only does one and finishes. Consider gsub like it's a minimum of two sub calls.

Also, it's important to remember that gsub, and sub can also be handicapped by poorly written regex which match much more slowly than a sub-string search. If possible anchor the regex to get the most speed from it. There are answers here on Stack Overflow demonstrating that so search around if you want more information.

Change color when hover a font awesome icon?

if you want to change only the colour of the flag on hover use this:

http://jsfiddle.net/uvamhedx/

_x000D_

.fa-flag:hover {_x000D_
    color: red;_x000D_
}

_x000D_

<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet"/>_x000D_
_x000D_
<i class="fa fa-flag fa-3x"></i>

_x000D_

How do I install PIL/Pillow for Python 3.6?

You can download the wheel corresponding to your configuration here ("Pillow-4.1.1-cp36-cp36m-win_amd64.whl" in your case) and install it with:

pip install some-package.whl

If you have problem to install the wheel read this answer

Does Python have a package/module management system?

As a Ruby and Perl developer and learning-Python guy, I haven't found easy_install or pip to be the equivalent to RubyGems or CPAN.

I tend to keep my development systems running the latest versions of modules as the developers update them, and freeze my production systems at set versions. Both RubyGems and CPAN make it easy to find modules by listing what's available, then install and later update them individually or in bulk if desired.

easy_install and pip make it easy to install a module ONCE I located it via a browser search or learned about it by some other means, but they won't tell me what is available. I can explicitly name the module to be updated, but the apps won't tell me what has been updated nor will they update everything in bulk if I want.

So, the basic functionality is there in pip and easy_install but there are features missing that I'd like to see that would make them friendlier and easier to use and on par with CPAN and RubyGems.

How to get a cookie from an AJAX response?

You're looking for a response header of Set-Cookie:

xhr.getResponseHeader('Set-Cookie');

It won't work with HTTPOnly cookies though.

Update

According to the XMLHttpRequest Level 1 and XMLHttpRequest Level 2, this particular response headers falls under the "forbidden" response headers that you can obtain using getResponseHeader(), so the only reason why this could work is basically a "naughty" browser.

Regular expression to return text between parenthesis

If your problem is really just this simple, you don't need regex:

s[s.find("(")+1:s.find(")")]

Making an image act like a button

You could implement a JavaScript block which contains a function with your needs.

<div style="position: absolute; left: 10px; top: 40px;"> 
    <img src="logg.png" width="114" height="38" onclick="DoSomething();" />
</div>

C# Copy a file to another location with a different name

StreamReader reader = new StreamReader(Oldfilepath);
string fileContent = reader.ReadToEnd();

StreamWriter writer = new StreamWriter(NewFilePath);
writer.Write(fileContent);

How do I install pip on macOS or OS X?

?? TL;DR — One line solution.

All you have to do is:

sudo easy_install pip

2019: ??easy_install has been deprecated. Check Method #2 below for preferred installation!

I made a gif, coz. why not?

Details:

?? OK, I read the solutions given above, but here's an EASY solution to install pip.

MacOS comes with Python installed. But to make sure that you have Python installed open the terminal and run the following command.

python --version

If this command returns a version number that means Python exists. Which also means that you already have access to easy_install considering you are using macOS/OSX.

?? Now, all you have to do is run the following command.

sudo easy_install pip

After that, pip will be installed and you'll be able to use it for installing other packages.

Let me know if you have any problems installing pip this way.

Cheers!

P.S. I ended up blogging a post about it. QuickTip: How Do I Install pip on macOS or OS X?

? UPDATE (Jan 2019): METHOD #2: Two line solution —

easy_install has been deprecated. Please use get-pip.py instead.

First of all download the get-pip file

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py

Now run this file to install pip

python get-pip.py

That should do it.

Another gif you said? Here ya go!

Convert a hexadecimal string to an integer efficiently in C?

This currently only works with lower case but its super easy to make it work with both.

cout << "\nEnter a hexadecimal number: ";
cin >> hexNumber;
orighex = hexNumber;

strlength = hexNumber.length();

for (i=0;i<strlength;i++)
{
    hexa = hexNumber.substr(i,1);
    if ((hexa>="0") && (hexa<="9"))
    {
        //cout << "This is a numerical value.\n";
    }
    else
    {
        //cout << "This is a alpabetical value.\n";
        if (hexa=="a"){hexa="10";}
        else if (hexa=="b"){hexa="11";}
        else if (hexa=="c"){hexa="12";}
        else if (hexa=="d"){hexa="13";}
        else if (hexa=="e"){hexa="14";}
        else if (hexa=="f"){hexa="15";}
        else{cout << "INVALID ENTRY! ANSWER WONT BE CORRECT\n";}
    }
    //convert from string to integer

    hx = atoi(hexa.c_str());
    finalhex = finalhex + (hx*pow(16.0,strlength-i-1));
}
cout << "The hexadecimal number: " << orighex << " is " << finalhex << " in decimal.\n";

why windows 7 task scheduler task fails with error 2147942667

I had the same problem, on Windows7.

I was getting error 2147942667 and a report of being unable to run c:\windows\system32\CMD.EXE. I tried with and without double quotes in the Script and Start-in and it made no difference. Then I tried replacing all path references to mapped network drives and with UNC references (\Server1\Sharexx\my_scripts\run_this.cmd) and that fixed it for me. Pat.

Access restriction: The type 'Application' is not API (restriction on required library rt.jar)

I simply just add e(fx)clipse in eclipse marketplace. Easy and simple

How to add onload event to a div element

I needed to have some initialization code run after a chunk of html (template instance) was inserted, and of course I didn't have access to the code that manipulates the template and modifies the DOM. The same idea holds for any partial modification of the DOM by insertion of an html element, usually a <div>.

Some time ago, I did a hack with the onload event of a nearly invisible <img> contained in a <div>, but discovered that a scoped, empty style will also do:

<div .... >
<style scoped="scoped" onload="dosomethingto(this.parentElement);" >   </style>
.....
</div>

Update(Jul 15 2017) - The <style> onload is not supported in last version of IE. Edge does support it, but some users see this as a different browser and stick with IE. The <img> element seems to work better across all browsers.

<div...>
<img onLoad="dosomthing(this.parentElement);" src="data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==" />
...
</div>

To minimize the visual impact and resource usage of the image, use an inline src that keeps it small and transparent.

One comment I feel I need to make about using a <script>is how much harder it is to determine which <div> the script is near, especially in templating where you can't have an identical id in each instance that the template generates. I thought the answer might be document.currentScript, but this is not universally supported. A <script> element cannot determine its own DOM location reliably; a reference to 'this' points to the main window, and is of no help.

I believe it is necessary to settle for using an <img> element, despite being goofy. This might be a hole in the DOM/javascript framework that could use plugging.

Python "SyntaxError: Non-ASCII character '\xe2' in file"

When I have a similar issue when reading text files i use...

f = open('file','rt', errors='ignore')

Remap values in pandas column with a dict

As an extension to what have been proposed by Nico Coallier (apply to multiple columns) and U10-Forward(using apply style of methods), and summarising it into a one-liner I propose:

df.loc[:,['col1','col2']].transform(lambda x: x.map(lambda x: {1: "A", 2: "B"}.get(x,x))

The .transform() processes each column as a series. Contrary to .apply()which passes the columns aggregated in a DataFrame.

Consequently you can apply the Series method map().

Finally, and I discovered this behaviour thanks to U10, you can use the whole Series in the .get() expression. Unless I have misunderstood its behaviour and it processes sequentially the series instead of bitwisely.
The .get(x,x)accounts for the values you did not mention in your mapping dictionary which would be considered as Nan otherwise by the .map() method

MySQL - how to front pad zip code with "0"?

It would still make sense to create your zip code field as a zerofilled unsigned integer field.

CREATE TABLE xxx ( zipcode INT(5) ZEROFILL UNSIGNED, ... )

That way mysql takes care of the padding for you.

How to check version of a CocoaPods framework

The highest voted answer (MishieMoo) is correct but it doesn't explain how to open Podfile.lock. Everytime I tried I kept getting:

You open it in terminal by going to the folder it's in and running:

vim Podfile.lock

I got the answer from here: how to open Podfile.lock

You close it by pressing the colon and typing quit or by pressing the colon and the letter q then enter

:quit // then return key
:q // then return key

Another way is in terminal, you can also cd to the folder that your Xcode project is in and enter

$ open Podfile.lock -a Xcode

Doing it the second way, after it opens just press the red X button in the upper left hand corner to close.

How to fix missing dependency warning when using useEffect React Hook?

you try this way

const fetchBusinesses = () => {
    return fetch("theURL", {method: "GET"}
    )
      .then(res => normalizeResponseErrors(res))
      .then(res => {
        return res.json();
      })
      .then(rcvdBusinesses => {
        // some stuff
      })
      .catch(err => {
        // some error handling
      });
  };

and

useEffect(() => {
    fetchBusinesses();
  });

it's work for you. But my suggestion is try this way also work for you. It's better than before way. I use this way:

useEffect(() => {
        const fetchBusinesses = () => {
    return fetch("theURL", {method: "GET"}
    )
      .then(res => normalizeResponseErrors(res))
      .then(res => {
        return res.json();
      })
      .then(rcvdBusinesses => {
        // some stuff
      })
      .catch(err => {
        // some error handling
      });
  };
        fetchBusinesses();
      }, []);

if you get data on the base of specific id then add in callback useEffect [id] then cannot show you warning React Hook useEffect has a missing dependency: 'any thing'. Either include it or remove the dependency array

How to detect scroll position of page using jQuery

$(window).scroll( function() { 
 var scrolled_val = $(document).scrollTop().valueOf();
 alert(scrolled_val+ ' = scroll value');
});

This is another way of getting the value of scroll.

How To Remove Outline Border From Input Button

Removing the outline is an accessibility nightmare. People tabbing using keyboards will never know what item they're on.

Best to leave it, as most clicked buttons will take you somewhere anyway, or if you HAVE to remove the outline then isolate it a specific class name.

.no-outline {
  outline: none;
}

Then you can apply that class whenever you need to.

c# why can't a nullable int be assigned null as a value

The problem isn't that null cannot be assigned to an int?. The problem is that both values returned by the ternary operator must be the same type, or one must be implicitly convertible to the other. In this case, null cannot be implicitly converted to int nor vice-versus, so an explict cast is necessary. Try this instead:

int? accom = (accomStr == "noval" ? (int?)null : Convert.ToInt32(accomStr));

How can I implement the Iterable interface?

Iterable is a generic interface. A problem you might be having (you haven't actually said what problem you're having, if any) is that if you use a generic interface/class without specifying the type argument(s) you can erase the types of unrelated generic types within the class. An example of this is in Non-generic reference to generic class results in non-generic return types.

So I would at least change it to:

public class ProfileCollection implements Iterable<Profile> { 
    private ArrayList<Profile> m_Profiles;

    public Iterator<Profile> iterator() {        
        Iterator<Profile> iprof = m_Profiles.iterator();
        return iprof; 
    }

    ...

    public Profile GetActiveProfile() {
        return (Profile)m_Profiles.get(m_ActiveProfile);
    }
}

and this should work:

for (Profile profile : m_PC) {
    // do stuff
}

Without the type argument on Iterable, the iterator may be reduced to being type Object so only this will work:

for (Object profile : m_PC) {
    // do stuff
}

This is a pretty obscure corner case of Java generics.

If not, please provide some more info about what's going on.

What does "TypeError 'xxx' object is not callable" means?

The exception is raised when you try to call not callable object. Callable objects are (functions, methods, objects with __call__)

>>> f = 1
>>> callable(f)
False
>>> f()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'int' object is not callable

Turn off axes in subplots

import matplotlib.pyplot as plt

fig, ax = plt.subplots(2, 2)

To turn off axes for all subplots, do either:

[axi.set_axis_off() for axi in ax.ravel()]

map(lambda axi: axi.set_axis_off(), ax.ravel())

TypeError: 'bool' object is not callable

You do cls.isFilled = True. That overwrites the method called isFilled and replaces it with the value True. That method is now gone and you can't call it anymore. So when you try to call it again you get an error, since it's not there anymore.

The solution is use a different name for the variable than you do for the method.

Import-Module : The specified module 'activedirectory' was not loaded because no valid module file was found in any module directory

You can install the Active Directory snap-in with Powershell on Windows Server 2012 using the following command:

Install-windowsfeature -name AD-Domain-Services –IncludeManagementTools

This helped me when I had problems with the Features screen due to AppFabric and Windows Update errors.

Setting an image button in CSS - image:active

This is what worked for me.

<!DOCTYPE html> 
<form action="desired Link">
  <button>  <img src="desired image URL"/>
  </button>
</form>
<style> 

</style>

angular 2 sort and filter

Here is a simple filter pipe for array of objects that contain attributes with string values (ES6)

filter-array-pipe.js

import {Pipe} from 'angular2/core';

// # Filter Array of Objects
@Pipe({ name: 'filter' })
export class FilterArrayPipe {
  transform(value, args) {
    if (!args[0]) {
      return value;
    } else if (value) {
      return value.filter(item => {
        for (let key in item) {
          if ((typeof item[key] === 'string' || item[key] instanceof String) && 
              (item[key].indexOf(args[0]) !== -1)) {
            return true;
          }
        }
      });
    }
  }
}

Your component

myobjComponent.js

import {Component} from 'angular2/core';
import {HTTP_PROVIDERS, Http} from 'angular2/http';
import {FilterArrayPipe} from 'filter-array-pipe';

@Component({
  templateUrl: 'myobj.list.html',
  providers: [HTTP_PROVIDERS],
  pipes: [FilterArrayPipe]
})
export class MyObjList {
  static get parameters() {
    return [[Http]];
  }
  constructor(_http) {
    _http.get('/api/myobj')
      .map(res => res.json())
      .subscribe(
        data => this.myobjs = data,
        err => this.logError(err))
      );
  }
  resetQuery(){
    this.query = '';
  }
}

In your template

myobj.list.html

<input type="text" [(ngModel)]="query" placeholder="... filter" > 
<div (click)="resetQuery()"> <span class="icon-cross"></span> </div>
</div>
<ul><li *ngFor="#myobj of myobjs| filter:query">...<li></ul>

Undefined reference to pthread_create in Linux

Acutally, it gives several examples of compile commands used for pthreads codes are listed in the table below, if you continue reading the following tutorial:

https://computing.llnl.gov/tutorials/pthreads/#Compiling

enter image description here

How do you post to an iframe?

This function creates a temporary form, then send data using jQuery :

function postToIframe(data,url,target){
    $('body').append('<form action="'+url+'" method="post" target="'+target+'" id="postToIframe"></form>');
    $.each(data,function(n,v){
        $('#postToIframe').append('<input type="hidden" name="'+n+'" value="'+v+'" />');
    });
    $('#postToIframe').submit().remove();
}

target is the 'name' attr of the target iFrame, and data is a JS object :

data={last_name:'Smith',first_name:'John'}

How do I round a double to two decimal places in Java?

Your Money class could be represented as a subclass of Long or having a member representing the money value as a native long. Then when assigning values to your money instantiations, you will always be storing values that are actually REAL money values. You simply output your Money object (via your Money's overridden toString() method) with the appropriate formatting. e.g $1.25 in a Money object's internal representation is 125. You represent the money as cents, or pence or whatever the minimum denomination in the currency you are sealing with is ... then format it on output. No you can NEVER store an 'illegal' money value, like say $1.257.

Debugging PHP Mail() and/or PHPMailer

It looks like the class.phpmailer.php file is corrupt. I would download the latest version and try again.

I've always used phpMailer's SMTP feature:

$mail->IsSMTP();
$mail->Host = "localhost";

And if you need debug info:

$mail->SMTPDebug  = 2; // enables SMTP debug information (for testing)
                       // 1 = errors and messages
                       // 2 = messages only

How to identify object types in java

You forgot the .class:

if (value.getClass() == Integer.class) {
    System.out.println("This is an Integer");
} 
else if (value.getClass() == String.class) {
    System.out.println("This is a String");
}
else if (value.getClass() == Float.class) {
    System.out.println("This is a Float");
}

Note that this kind of code is usually the sign of a poor OO design.

Also note that comparing the class of an object with a class and using instanceof is not the same thing. For example:

"foo".getClass() == Object.class

is false, whereas

"foo" instanceof Object

is true.

Whether one or the other must be used depends on your requirements.

SQL - using alias in Group By

You could always use a subquery so you can use the alias; Of course, check the performance (Possible the db server will run both the same, but never hurts to verify):

SELECT ItemName, FirstLetter, COUNT(ItemName)
FROM (
    SELECT ItemName, SUBSTRING(ItemName, 1, 1) AS FirstLetter
    FROM table1
    ) ItemNames
GROUP BY ItemName, FirstLetter

PHP check whether property exists in object or class

property_exists( mixed $class , string $property )

if (property_exists($ob, 'a'))

isset( mixed $var [, mixed $... ] )

if (isset($ob->a))

isset() will return false if property is null

Example 1:

$ob->a = null
var_dump(isset($ob->a)); // false

Example 2:

class Foo
{
   public $bar = null;
}

$foo = new Foo();

var_dump(property_exists($foo, 'bar')); // true
var_dump(isset($foo->bar)); // false

The executable gets signed with invalid entitlements in Xcode

The error message from xcode app installation sometime can be very misleading, I have aligned the entitlements many times, but the root cause is not because of that, it is because I have changed the certificate and my build pipeline script was using wrong certificate SHA value:

/usr/bin/codesign --force --sign 701BB03735D5960C855D6E79223414F93F40065E --entitlements $workspace/xxx.app.xcent --timestamp=none $workspace/xxxx.app

for my case, nothing's wrong with my entitlement file, it is because 701BB03735D5960C855D6E79223414F93F40065E is wrong, but the error message always print out as The executable was signed with invalid entitlements. Wasted my whole day for this.

How to style the option of an html "select" element?

You can use inline styles to add custome styling to <option> tags.

For eg : <option style="font-weight:bold;color:#09C;">Option 1</option> This will apply the styles to this particular <option> element only.

Then you can use a bit of javascript magic to apply the inline styles to all of the <option> elements within a <select> tag like so :

var select = $(document).getElementById('#select-element-id')

var option = select.children('#option-element-id')

option.css('font-weight', 'bold')

option.css('font-size', '24px')

You can also use <option value="" disabled> <br> </option> to add a line-break between the options.

Textarea to resize based on content length

I don't think there's any way to get width of texts in variable-width fonts, especially in javascript.

The only way I can think is to make a hidden element that has variable width set by css, put text in its innerHTML, and get the width of that element. So you may be able to apply this method to cope with textarea auto-sizing problem.

How to make a div have a fixed size?

you can give it a max-height and max-width in your .css

.fontpixel{max-width:200px; max-height:200px;}

in addition to your height and width properties

How can I get my Android device country code without using GPS?

For some devices, if the default language is set different (an Indian can set English (US)) then

context.getResources().getConfiguration().locale.getDisplayCountry();

will give the wrong value. So this method is not reliable.

Also, getNetworkCountryIso() method of TelephonyManager will not work on devices which don't have SIM card (Wi-Fi tablets).

If a device doesn't have a SIM card then we can use the time zone to get the country. For countries like India, this method will work.

Sample code used to check the country is India or not.

Use the below values in your constants file

(Constants.INDIA_TIME_ZONE_ID: "asia/calcutta", Constants.NETWORK_INDIA_CODE :"in")

And in your activity, add the following code:

private void checkCountry() {

    TelephonyManager telMgr = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
    if (telMgr == null)
        return;

    int simState = telMgr.getSimState();

    switch (simState) {

        // If a SIM card is not available then the
        // country is found using the timezone ID
        case TelephonyManager.SIM_STATE_ABSENT:
            TimeZone tz = TimeZone.getDefault();
            String timeZoneId = tz.getID();
            if (timeZoneId.equalsIgnoreCase(Constants.INDIA_TIME_ZONE_ID)) {
               // Do something
            }
            else {
               // Do something
            }
            break;

        // If a SIM card is available then the telephony
        // manager network country information is used
        case TelephonyManager.SIM_STATE_READY:

            if (telMgr != null) {
                String countryCodeValue = tm.getNetworkCountryIso();

                // Check if the network country code is "in"
                if (countryCodeValue.equalsIgnoreCase(Constants.NETWORK_INDIA_CODE)) {
                   // Do something
                }
                else {
                   // Do something
                }
            }
            break;
    }
}

jQuery Ajax calls and the Html.AntiForgeryToken()

AntiforgeryToken is still a pain, none of the examples above worked word for word for me. Too many for's there. So I combined them all. Need a @Html.AntiforgeryToken in a form hanging around iirc

Solved as so:

function Forgizzle(eggs) {
    eggs.__RequestVerificationToken =  $($("input[name=__RequestVerificationToken]")[0]).val();
    return eggs;
}

$.ajax({
            url: url,
            type: 'post',
            data: Forgizzle({ id: id, sweets: milkway }),
});

When in doubt, add more $ signs

How to use the 'main' parameter in package.json?

If you have for instance in your package.json file:

{
"name": "zig-zag",
"main": "lib/entry.js",
...
}

lib/entry.js will be the main entry point to your package.

When calling

require('zig-zag');

in node, lib/entry.js will be the actual file that is required.

"Primary Filegroup is Full" in SQL Server 2008 Standard for no apparent reason

I found that this happens because: http://support.microsoft.com/kb/913399

SQL Server only releases all the pages that a heap table uses when the following conditions are true: A deletion on this table occurs. A table-level lock is being held. Note A heap table is any table that is not associated with a clustered index.

If pages are not deallocated, other objects in the database cannot reuse the pages.

However, when you enable a row versioning-based isolation level in a SQL Server 2005 database, pages cannot be released even if a table-level lock is being held.

Microsoft's solution: http://support.microsoft.com/kb/913399

To work around this problem, use one of the following methods: Include a TABLOCK hint in the DELETE statement if a row versioning-based isolation level is not enabled. For example, use a statement that is similar to the following:

DELETE FROM TableName WITH (TABLOCK)

Note represents the name of the table. Use the TRUNCATE TABLE statement if you want to delete all the records in the table. For example, use a statement that is similar to the following:

TRUNCATE TABLE TableName

Create a clustered index on a column of the table. For more information about how to create a clustered index on a table, see the "Creating a Clustered Index" topic in SQL

You'll notice at the bottom of the link that it is NOT noted that it applies to SQL Server 2008 but I think it does

How to get all properties values of a JavaScript Object (without knowing the keys)?

I realize I'm a little late but here's a shim for the new firefox 47 Object.values method

Object.prototype.values = Object.prototype.values || function(obj) {
  return this.keys(obj).map(function(key){
    return obj[key];
  });
};

How to include a class in PHP

Check: http://www.php.net/require and http://www.php.net/include

VSCode cannot find module '@angular/core' or any other modules

I faced the same problem , As I'm trying to work on angular project in VS code.

The solution for which this issue resolved is .

Delete the node_modules folder if you have one in your project folder

2.run the following command in terminal

npm install

Then Run npm audit fix
Then Run npm audit fix --force

now the issue will be resolved.

Accessing JSON elements

I did this method for in-depth navigation of a Json

def filter_dict(data: dict, extract):
    try:
        if isinstance(extract, list):
            for i in extract:
                result = filter_dict(data, i)
                if result:
                    return result
        keys = extract.split('.')
        shadow_data = data.copy()
        for key in keys:
            if str(key).isnumeric():
                key = int(key)
            shadow_data = shadow_data[key]
        return shadow_data
    except IndexError:
        return None

filter_dict(wjdata, 'data.current_condition.0.temp_C')
# 10

What is tail call optimization?

Look here:

http://tratt.net/laurie/tech_articles/articles/tail_call_optimization

As you probably know, recursive function calls can wreak havoc on a stack; it is easy to quickly run out of stack space. Tail call optimization is way by which you can create a recursive style algorithm that uses constant stack space, therefore it does not grow and grow and you get stack errors.

SQL Server : check if variable is Empty or NULL for WHERE clause

WHERE p.[Type] = isnull(@SearchType, p.[Type])

Reading settings from app.config or web.config in .NET

Step 1: Right-click on references tab to add reference.

Step 2: Click on Assemblies tab

Step 3: Search for 'System.Configuration'

Step 4: Click OK.

Then it will work.

 string value = System.Configuration.ConfigurationManager.AppSettings["keyname"];

NodeJS - What does "socket hang up" actually mean?

I think worth noting...

I was creating tests for Google APIs. I was intercepting the request with a makeshift server, then forwarding those to the real api. I was attempting to just pass along the headers in the request, but a few headers were causing a problem with express on the other end.

Namely, I had to delete connection, accept, and content-length headers before using the request module to forward along.

let headers = Object.assign({}, req.headers);
delete headers['connection']
delete headers['accept']
delete headers['content-length']
res.end() // We don't need the incoming connection anymore
request({
  method: 'post',
  body: req.body,
  headers: headers,
  json: true,
  url: `http://myapi/${req.url}`
}, (err, _res, body)=>{
  if(err) return done(err);
  // Test my api response here as if Google sent it.
})

Can I escape html special chars in javascript?

function escapeHtml(unsafe) {
    return unsafe
         .replace(/&/g, "&amp;")
         .replace(/</g, "&lt;")
         .replace(/>/g, "&gt;")
         .replace(/"/g, "&quot;")
         .replace(/'/g, "&#039;");
 }

How to round the minute of a datetime object

yes, if your data belongs to a DateTime column in a pandas series, you can round it up using the built-in pandas.Series.dt.round function. See documentation here on pandas.Series.dt.round. In your case of rounding to 10min it will be Series.dt.round('10min') or Series.dt.round('600s') like so:

pandas.Series(tm).dt.round('10min')

Edit to add Example code:

import datetime
import pandas

tm = datetime.datetime(2010, 6, 10, 3, 56, 23)
tm_rounded = pandas.Series(tm).dt.round('10min')
print(tm_rounded)

>>> 0   2010-06-10 04:00:00
dtype: datetime64[ns]

Correctly ignore all files recursively under a specific folder except for a specific file type

@SimonBuchan is correct.

Since git 1.8.2, Resources/** !Resources/**/*.foo works.

Android : change button text and background color

When you create an App, a file called styles.xml will be created in your res/values folder. If you change the styles, you can change the background, text color, etc for all your layouts. That way you don’t have to go into each individual layout and change the it manually.

styles.xml:

<resources xmlns:android="http://schemas.android.com/apk/res/android">
<style name="Theme.AppBaseTheme" parent="@android:style/Theme.Light">
    <item name="android:editTextColor">#295055</item> 
    <item name="android:textColorPrimary">#295055</item>
    <item name="android:textColorSecondary">#295055</item>
    <item name="android:textColorTertiary">#295055</item>
    <item name="android:textColorPrimaryInverse">#295055</item>
    <item name="android:textColorSecondaryInverse">#295055</item>
    <item name="android:textColorTertiaryInverse">#295055</item>

     <item name="android:windowBackground">@drawable/custom_background</item>        
</style>

<!-- Application theme. -->
<style name="AppTheme" parent="AppBaseTheme">
    <!-- All customizations that are NOT specific to a particular API-level can go here. -->
</style>

parent="@android:style/Theme.Light" is Google’s native colors. Here is a reference of what the native styles are: https://android.googlesource.com/platform/frameworks/base/+/refs/heads/master/core/res/res/values/themes.xml

name="Theme.AppBaseTheme" means that you are creating a style that inherits all the styles from parent="@android:style/Theme.Light". This part you can ignore unless you want to inherit from AppBaseTheme again. = <style name="AppTheme" parent="AppBaseTheme">

@drawable/custom_background is a custom image I put in the drawable’s folder. It is a 300x300 png image.

#295055 is a dark blue color.

My code changes the background and text color. For Button text, please look through Google’s native stlyes (the link I gave u above).

Then in Android Manifest, remember to include the code:

<application
android:theme="@style/Theme.AppBaseTheme">

Does JavaScript have a built in stringbuilder class?

No, there is no built-in support for building strings. You have to use concatenation instead.

You can, of course, make an array of different parts of your string and then call join() on that array, but it then depends on how the join is implemented in the JavaScript interpreter you are using.

I made an experiment to compare the speed of str1+str2 method versus array.push(str1, str2).join() method. The code was simple:

var iIterations =800000;
var d1 = (new Date()).valueOf();
str1 = "";
for (var i = 0; i<iIterations; i++)
    str1 = str1 + Math.random().toString();
var d2 = (new Date()).valueOf();
log("Time (strings): " + (d2-d1));

var d3 = (new Date()).valueOf();
arr1 = [];
for (var i = 0; i<iIterations; i++)
    arr1.push(Math.random().toString());
var str2 = arr1.join("");
var d4 = (new Date()).valueOf();
log("Time (arrays): " + (d4-d3));

I tested it in Internet Explorer 8 and Firefox 3.5.5, both on a Windows 7 x64.

In the beginning I tested on small number of iterations (some hundred, some thousand items). The results were unpredictable (sometimes string concatenation took 0 milliseconds, sometimes it took 16 milliseconds, the same for array joining).

When I increased the count to 50,000, the results were different in different browsers - in Internet Explorer the string concatenation was faster (94 milliseconds) and join was slower(125 milliseconds), while in Firefox the array join was faster (113 milliseconds) than string joining (117 milliseconds).

Then I increased the count to 500'000. Now the array.join() was slower than string concatenation in both browsers: string concatenation was 937 ms in Internet Explorer, 1155 ms in Firefox, array join 1265 in Internet Explorer, and 1207 ms in Firefox.

The maximum iteration count I could test in Internet Explorer without having "the script is taking too long to execute" was 850,000. Then Internet Explorer was 1593 for string concatenation and 2046 for array join, and Firefox had 2101 for string concatenation and 2249 for array join.

Results - if the number of iterations is small, you can try to use array.join(), as it might be faster in Firefox. When the number increases, the string1+string2 method is faster.

UPDATE

I performed the test on Internet Explorer 6 (Windows XP). The process stopped to respond immediately and never ended, if I tried the test on more than 100,000 iterations. On 40,000 iterations the results were

Time (strings): 59175 ms
Time (arrays): 220 ms

This means - if you need to support Internet Explorer 6, choose array.join() which is way faster than string concatenation.

Create a Maven project in Eclipse complains "Could not resolve archetype"

You will need to install the m2eclipse or any other maven plugin in your eclipse. Some eclipse come with maven and its plugins installed. Otherwise go to Help->software Install, select All sites, filter list with maven, and then install the plugin. Then look at this link. Hope it helps.

Work with a time span in Javascript

If you're not too worried in accuracy after days, you can simply do the maths

function timeSince(when) { // this ignores months
    var obj = {};
    obj._milliseconds = (new Date()).valueOf() - when.valueOf();
    obj.milliseconds = obj._milliseconds % 1000;
    obj._seconds = (obj._milliseconds - obj.milliseconds) / 1000;
    obj.seconds = obj._seconds % 60;
    obj._minutes = (obj._seconds - obj.seconds) / 60;
    obj.minutes = obj._minutes % 60;
    obj._hours = (obj._minutes - obj.minutes) / 60;
    obj.hours = obj._hours % 24;
    obj._days = (obj._hours - obj.hours) / 24;
    obj.days = obj._days % 365;
    // finally
    obj.years = (obj._days - obj.days) / 365;
    return obj;
}

then timeSince(pastDate); and use the properties as you like.

Otherwise you can use .getUTC* to calculate it, but note it may be slightly slower to calculate

function timeSince(then) {
    var now = new Date(), obj = {};
    obj.milliseconds = now.getUTCMilliseconds() - then.getUTCMilliseconds();
    obj.seconds = now.getUTCSeconds() - then.getUTCSeconds();
    obj.minutes = now.getUTCMinutes() - then.getUTCMinutes();
    obj.hours = now.getUTCHours() - then.getUTCHours();
    obj.days = now.getUTCDate() - then.getUTCDate();
    obj.months = now.getUTCMonth() - then.getUTCMonth();
    obj.years = now.getUTCFullYear() - then.getUTCFullYear();
    // fix negatives
    if (obj.milliseconds < 0) --obj.seconds, obj.milliseconds = (obj.milliseconds + 1000) % 1000;
    if (obj.seconds < 0) --obj.minutes, obj.seconds = (obj.seconds + 60) % 60;
    if (obj.minutes < 0) --obj.hours, obj.minutes = (obj.minutes + 60) % 60;
    if (obj.hours < 0) --obj.days, obj.hours = (obj.hours + 24) % 24;
    if (obj.days < 0) { // months have different lengths
        --obj.months;
        now.setUTCMonth(now.getUTCMonth() + 1);
        now.setUTCDate(0);
        obj.days = (obj.days + now.getUTCDate()) % now.getUTCDate();
    }
    if (obj.months < 0)  --obj.years, obj.months = (obj.months + 12) % 12;
    return obj;
}

Single Page Application: advantages and disadvantages

One major disadvantage of SPA - SEO. Only recently Google and Bing started indexing Ajax-based pages by executing JavaScript during crawling, and still in many cases pages are being indexed incorrectly.

While developing SPA, you will be forced to handle SEO issues, probably by post-rendering all your site and creating static html snapshots for crawler's use. This will require a solid investment in a proper infrastructures.

Update 19.06.16:

Since writing this answer a while ago, I gain much more experience with Single Page Apps (namely, AngularJS 1.x) - so I have more info to share.

In my opinion, the main disadvantage of SPA applications is SEO, making them limited to kind of "dashboard" apps only. In addition, you are going to have a much harder times with caching, compared to classic solutions. For example, in ASP.NET caching is extreamly easy - just turn on OutputCaching and you are good: the whole HTML page will be cached according to URL (or any other parameters). However, in SPA you will need to handle caching yourself (by using some solutions like second level cache, template caching, etc..).

How to show multiline text in a table cell

Two suggestions to solving this problem:

SOLUTION 1: <div style="white-space:pre;">{database text}</div> or <pre>{database text}</pre>

This is good solution if your text has no html tags or css properties. Also allows to maintain tabs for example.

SOLUTION 2: Replace \n with <p></p> or <br/>

This is a solution if you would just like to add break-lines, without losing other text properties or formatting. An example in php would be $text = str_replace("\n","<br />",$database_text);

You can also use <p></p> or <div></div>, but this requires a bit more text parsing.

Can you overload controller methods in ASP.NET MVC?

You can use the attribute if you want your code to do overloading.

[ActionName("MyOverloadedName")]

But, you'll have to use a different action name for the same http method (as others have said). So it's just semantics at that point. Would you rather have the name in your code or your attribute?

Phil has an article related to this: http://haacked.com/archive/2008/08/29/how-a-method-becomes-an-action.aspx

Differences between ConstraintLayout and RelativeLayout

Officially, ConstraintLayout is much faster

In the N release of Android, the ConstraintLayout class provides similar functionality to RelativeLayout, but at a significantly lower cost.

How to remove the character at a given index from a string in C?

My way to remove all specified chars:

void RemoveChars(char *s, char c)
{
    int writer = 0, reader = 0;

    while (s[reader])
    {
        if (s[reader]!=c) 
        {   
            s[writer++] = s[reader];
        }

        reader++;       
    }

    s[writer]=0;
}

How to add to an existing hash in Ruby

If you want to add more than one:

hash = {:a => 1, :b => 2}
hash.merge! :c => 3, :d => 4
p hash

Centering image and text in R Markdown for a PDF report

None of the answers work for all output types the same way and others focus on figures plottet within the code chunk and not external images.

The include_graphics() function provides an easy solution. The only argument is the name of the file (with the relative path if it's in a subfolder). By setting echo to FALSE and fig.align=center you get the wished result.

```{r, echo=FALSE, fig.align='center'}
include_graphics("image.jpg")
```

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

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

Why doesn't margin:auto center an image?

open div then put

style="width:100% ; margin:0px auto;"

image tag (or) content

close div

Popup window in winform c#

Forms in C# are classes that inherit the Form base class.

You can show a popup by creating an instance of the class and calling ShowDialog().

iptables block access to port 8000 except from IP address

You can always use iptables to delete the rules. If you have a lot of rules, just output them using the following command.

iptables-save > myfile

vi to edit them from the commend line. Just use the "dd" to delete the lines you no longer want.

iptables-restore < myfile and you're good to go.

REMEMBER THAT IF YOU DON'T CONFIGURE YOUR OS TO SAVE THE RULES TO A FILE AND THEN LOAD THE FILE DURING THE BOOT THAT YOUR RULES WILL BE LOST.

How to check if a word is an English word with Python?

Using NLTK:

from nltk.corpus import wordnet

if not wordnet.synsets(word_to_test):
  #Not an English Word
else:
  #English Word

You should refer to this article if you have trouble installing wordnet or want to try other approaches.

phpmyadmin - count(): Parameter must be an array or an object that implements Countable

Hi the following solve my same problem absolutely (import/export and so on):

Fix Bug Phpmyadmin [plugin_interface.lib.php] + Php7.2 + Ubuntu 16.04

so... under ubuntu 18.04, mysql, php7.2: Terminal:

sudo gedit /usr/share/phpmyadmin/libraries/plugin_interface.lib.php

Find the following line(ctrl+f):

if ($options != null && count($options) > 0) {

it was on line #551 for me

and change for following:

if ($options != null && count((array)$options) > 0) {

ctrl+s for save the changes

and in terminal: ctrl+c for get back promt...

and: sudo systemctl restart apache2

"I think in new php version.It can’t use count() or sizeof() with un array type. Force parameter to array is easy way to solve this bug,..."

Thanks for the original author for the problem solving! I try to share it!

How to prevent default event handling in an onclick method?

Another way to do that is to use the event object inside the attribute onclick (without the need to add an additional argument to the function to pass the event)

_x000D_

function callmymethod(myVal){_x000D_
    console.log(myVal);_x000D_
}

_x000D_

<a href="#link" onclick="event.preventDefault();callmymethod(24)">Call</a>

_x000D_

ServletException, HttpServletResponse and HttpServletRequest cannot be resolved to a type

Two possible issues could be

you either forgot to include Servlet jar in your classpath
you forgot to import it in your Servlet class

To include Servlet jar in your class path in eclipse, Download the latest Servlet Jar and configure using buildpath option. look at this Link for more info.

If you have included the jar make sure that your import is declared.

import javax.servlet.http.HttpServletResponse

How to get text of an element in Selenium WebDriver, without including child element text?

Here's a general solution:

def get_text_excluding_children(driver, element):
    return driver.execute_script("""
    return jQuery(arguments[0]).contents().filter(function() {
        return this.nodeType == Node.TEXT_NODE;
    }).text();
    """, element)

The element passed to the function can be something obtained from the find_element...() methods (i.e. it can be a WebElement object).

Or if you don't have jQuery or don't want to use it you can replace the body of the function above above with this:

return self.driver.execute_script("""
var parent = arguments[0];
var child = parent.firstChild;
var ret = "";
while(child) {
    if (child.nodeType === Node.TEXT_NODE)
        ret += child.textContent;
    child = child.nextSibling;
}
return ret;
""", element)

I'm actually using this code in a test suite.

Checking if jquery is loaded using Javascript

Just a small modification that might actually solve the problem:

window.onload = function() {
   if (window.jQuery) {  
       // jQuery is loaded  
       alert("Yeah!");
   } else {
    location.reload();
   }
}

Instead of $(document).Ready(function() use window.onload = function().

How to handle "Uncaught (in promise) DOMException: play() failed because the user didn't interact with the document first." on Desktop with Chrome 66?

I encountered a similar error with while attempting to play an audio file. At first, it was working, then it stopped working when I started using ChangeDetector's markForCheck method in the same function to trigger a re-render when a promise resolves (I had an issue with view rendering).

When I changed the markForCheck to detectChanges it started working again. I really can't explain what happened, I just thought of dropping this here, perhaps it would help someone.

How to use patterns in a case statement?

I don't think you can use braces.

According to the Bash manual about case in Conditional Constructs.

Each pattern undergoes tilde expansion, parameter expansion, command substitution, and arithmetic expansion.

Nothing about Brace Expansion unfortunately.

So you'd have to do something like this:

case $1 in
    req*)
        ...
        ;;
    met*|meet*)
        ...
        ;;
    *)
        # You should have a default one too.
esac

Difference between MongoDB and Mongoose

I assume you already know that MongoDB is a NoSQL database system which stores data in the form of BSON documents. Your question, however is about the packages for Node.js.

In terms of Node.js, mongodb is the native driver for interacting with a mongodb instance and mongoose is an Object modeling tool for MongoDB.

Mongoose is built on top of the MongoDB driver to provide programmers with a way to model their data.

EDIT: I do not want to comment on which is better, as this would make this answer opinionated. However I will list some advantages and disadvantages of using both approaches.

Using Mongoose, a user can define the schema for the documents in a particular collection. It provides a lot of convenience in the creation and management of data in MongoDB. On the downside, learning mongoose can take some time, and has some limitations in handling schemas that are quite complex.

However, if your collection schema is unpredictable, or you want a Mongo-shell like experience inside Node.js, then go ahead and use the MongoDB driver. It is the simplest to pick up. The downside here is that you will have to write larger amounts of code for validating the data, and the risk of errors is higher.

Is there a format code shortcut for Visual Studio?

Ctrl + K + D (Entire document)

Ctrl + K + F (Selection only)

TypeError: expected string or buffer

'lines' term from your snippet consists of set of strings.

 lines = f.readlines()
 match = re.findall('[A-Z]+', lines)

You cannot send entire lines into the re.findall('pattern',<string>)

You can try to send line by line

 for i in lines:
  match = re.findall('[A-Z]+', i)
  print match

or to convert the entire lines collection into single line (each line seperated by space)

 NEW_LIST=' '.join(lines)
 match=re.findall('[A-Z]+' ,NEW_LIST)
 print match

This might help you

MySQL DROP all tables, ignoring foreign keys

This solution is based on @SkyLeach answer but with the support of dropping tables with foreign keys.

echo "SET FOREIGN_KEY_CHECKS = 0;" > ./drop_all_tables.sql
mysqldump --add-drop-table --no-data -u user -p dbname | grep 'DROP TABLE' >> ./drop_all_tables.sql
echo "SET FOREIGN_KEY_CHECKS = 1;" >> ./drop_all_tables.sql
mysql -u user -p dbname < ./drop_all_tables.sql

how to make a div to wrap two float divs inside?

<html>
<head>
    <style>
        #main { border: 1px #000 solid; width: 600px; height: 400px; margin: auto;}
        #one { width: 20%; height: 100%; background-color: blue; display: inline-block; }
        #two { width: 80%; height: 100%; background-color: red; display: inline-block; }
    </style>
</head>
<body>
<div id="main">
    <span id="one">one</span><span id="two">two</span>
</div>
</body>
</html>

The secret is the inline-block. If you use borders or margins, you may need to reduce the width of the div that use them.

NOTE: This doesn't work properly in IE6/7 if you use "DIV" instead of "SPAN". (see http://www.quirksmode.org/css/display.html)

Content Type text/xml; charset=utf-8 was not supported by service

Do not forget check the bindings-related code too. So if you wrote:

BasicHttpBinding binding = new BasicHttpBinding();

Be sure that all your app.config files contains

<endpoint address="..."
          binding="basicHttpBinding" ...

not the

<endpoint address="..."
          binding="wsHttpBinding" ...

or so.

Using Mockito with multiple calls to the same method with the same arguments

Following can be used as a common method to return different arguments on different method calls. Only thing we need to do is we need to pass an array with order in which objects should be retrieved in each call.

@SafeVarargs
public static <Mock> Answer<Mock> getAnswerForSubsequentCalls(final Mock... mockArr) {
    return new Answer<Mock>() {
       private int count=0, size=mockArr.length;
       public Mock answer(InvocationOnMock invocation) throws throwable {
           Mock mock = null;
           for(; count<size && mock==null; count++){
                mock = mockArr[count];
           }

           return mock;    
       } 
    }
}

Ex. getAnswerForSubsequentCalls(mock1, mock3, mock2); will return mock1 object on first call, mock3 object on second call and mock2 object on third call. Should be used like when(something()).doAnswer(getAnswerForSubsequentCalls(mock1, mock3, mock2)); This is almost similar to when(something()).thenReturn(mock1, mock3, mock2);

How to connect to MongoDB in Windows?

For this error, if you are using windows 7 or windows server 2008 R2, the problem could be that you have to install a microsoft hotfix.

Refer to this link: https://support.microsoft.com/en-us/kb/2731284

Tomcat Server not starting with in 45 seconds

Disabling my antivirus does the trick for me ...

How to increase Java heap space for a tomcat app

First of all you cannot change the memory settings only for a tomcat application but rather for all tomcat instance.

If you are running tomcat from console (using startup.bat) you'll need to edit catalina.bat and play around with CATALINA_OPTS. For example:

set CATALINA_OPTS=-Xms512m -Xmx512m

Restarting tomcat will apply the new settings.

If you are still getting OutOfMemoryError you need to know how much memory does your application need at that particular moment (nom.tam.util.ArrayFuncs...). You'll either have to optimize the application or simply increase the memory provided to tomcat.

List of phone number country codes

~~There is an Excel file with regexps here. You can easily "convert" it to XML and you will be able to determine country by the full phone number.~~

UPD: The file that I referenced 4 years ago is no longer accessible. I would recommend using Google's libphonenumber.

The answer to Extract code country from phone number [libphonenumber] will show you the proper way to receive country code from a phone number.

What's the best way to override a user agent CSS stylesheet rule that gives unordered-lists a 1em margin?

I don't understand why nobody points to the specific issue and some answers are totally misleading, especially the accepted answer. The issue is that the OP did not pick a rule that could possibly override the margin property that is set by the User Agent (UA) directly on the ul tag. Let's consider all the rules with a margin property used by the OP.

body {

margin:0px;
...
}

The body element is way up in the DOM and the UA rule matches an element below, so the UA wins. It's the way inheritance works. Inheritance is the means by which, in the absence of any specific declarations from any source applied by the CSS cascade, a property value of an element is obtained from its parent element. Specificity on the parent element is useless, because the UA rule matches directly the element.

#mainNav{
    margin:0 auto;
    ...
}

This is a better attempt, a more specific selector #mainNav, which matches the mainNav element lower in the DOM, but the same principle applies, because the ul element is still below this element in the DOM.

#mainNav ul li{
    ...
    margin:0;
    ...
}

This went too far down in the DOM! Now, the selector matches the li element, which is below the ul element.

So, assuming that the UA rule used the selector ul and not !important, which is most likely the case, the solution would have been a simple ul { margin: 0; }, but it would be safer to make it more specific, say #mainNav ul { margin: 0 }.

Create a sample login page using servlet and JSP?

You aren't really using the doGet() method. When you're opening the page, it issues a GET request, not POST.

Try changing doPost() to service() instead... then you're using the same method to handle GET and POST requests.

...

Removing Spaces from a String in C?

That's the easiest I could think of (TESTED) and it works!!

char message[50];
fgets(message, 50, stdin);
for( i = 0, j = 0; i < strlen(message); i++){
        message[i-j] = message[i];
        if(message[i] == ' ')
            j++;
}
message[i] = '\0';

Transpose a matrix in Python

Is there a prize for being lazy and using the transpose function of NumPy arrays? ;)

import numpy as np

a = np.array([(1,2,3), (4,5,6)])

b = a.transpose()

for-in statement

edit 2018: This is outdated, js and typescript now have for..of loops.
http://www.typescriptlang.org/docs/handbook/iterators-and-generators.html

The book "TypeScript Revealed" says

"You can iterate through the items in an array by using either for or for..in loops as demonstrated here:

// standard for loop
for (var i = 0; i < actors.length; i++)
{
  console.log(actors[i]);
}

// for..in loop
for (var actor in actors)
{
  console.log(actor);
}

Turns out, the second loop does not pass the actors in the loop. So would say this is plain wrong. Sadly it is as above, loops are untouched by typescript.

map and forEach often help me and are due to typescripts enhancements on function definitions more approachable, lke at the very moment:

this.notes = arr.map(state => new Note(state));

My wish list to TypeScript;

Generic collections
Iterators (IEnumerable, IEnumerator interfaces would be best)

Dynamically Add Variable Name Value Pairs to JSON Object

With ECMAScript 6 there is a better way.

You can use computed property names in object property definitions, for example:

var name1 = 'John'; 
var value1 = '42'; 
var name2 = 'Sarah'; 
var value2 = '35';

var ipID = { 
             [name1] : value1, 
             [name2] : value2 
           }

This is equivalent to the following, where you have variables for the property names.

var ipID = { 
             John: '42', 
             Sarah: '35' 
           }

Java Hashmap: How to get key from value?

There is no unambiguous answer, because multiple keys can map to the same value. If you are enforcing unique-ness with your own code, the best solution is to create a class that uses two Hashmaps to track the mappings in both directions.

select rows in sql with latest date for each ID repeated multiple times

You can do this with a Correlated Subquery (That is a subquery wherein you reference a field in the main query). In this case:

SELECT * 
FROM yourtable t1
WHERE date = (SELECT max(date) from yourtable WHERE id = t1.id)

Here we give the yourtable table an alias of t1 and then use that alias in the subquery grabbing the max(date) from the same table yourtable for that id.

How can I add a key/value pair to a JavaScript object?

Performance

Today 2020.01.14 I perform tests on MacOs HighSierra 10.13.6 on Chrome v78.0.0, Safari v13.0.4 and Firefox v71.0.0, for chosen solutions. I divide solutions to mutable (first letter M) and immutable (first letter I). I also provide few immutable solutions (IB,IC,ID/IE) not yet published in answers to this question

Conclusions

fastest mutable solutions are much faster than fastest immutable (>10x)
classic mutable approach like obj.key3 = "abc" (MA,MB) is fastest
for immutable solutions the {...obj, key3:'abc'} and Object.assign (IA,IB) are fastest
surprisingly there are immutable solutions faster than some mutable solutions for chrome (MC-IA) and safari (MD-IB)

Details

In snippet below there are presended tested solution, you can prefrom test on your machine HERE

_x000D_

var o = {_x000D_
    key1: true,_x000D_
    key2: 3,_x000D_
};_x000D_
_x000D_
var log= (s,f)=> console.log(`${s} --> ${JSON.stringify(f({...o}))}`);_x000D_
_x000D_
_x000D_
_x000D_
function MA(obj) {_x000D_
  obj.key3 = "abc";_x000D_
  return obj;_x000D_
}_x000D_
_x000D_
function MB(obj) {_x000D_
  obj['key3'] = "abc";_x000D_
  return obj;_x000D_
}_x000D_
_x000D_
function MC(obj) {_x000D_
  Object.assign(obj, {key3:'abc'});_x000D_
  return obj;_x000D_
}_x000D_
_x000D_
function MD(obj) {_x000D_
  Object.defineProperty(obj, 'key3', {_x000D_
    value: "abc",       // undefined by default_x000D_
    enumerable: true,      // false by default_x000D_
    configurable: true,    // false by default_x000D_
    writable: true         // false by default_x000D_
  });_x000D_
  return obj;_x000D_
}_x000D_
_x000D_
function IA(obj) {_x000D_
  return {...obj, key3:'abc'};_x000D_
}_x000D_
_x000D_
function IB(obj) {_x000D_
  return Object.assign({key3:'abc'}, obj);_x000D_
}_x000D_
_x000D_
function IC(obj) {_x000D_
  let ob= JSON.parse(JSON.stringify(obj))_x000D_
  ob.key3 = 'abc';_x000D_
  return ob;_x000D_
}_x000D_
_x000D_
_x000D_
function ID(obj) {_x000D_
 let ob= Object.fromEntries(Object.entries(obj));_x000D_
  ob.key3 = 'abc';_x000D_
  return ob;_x000D_
}_x000D_
_x000D_
function IE(obj) {_x000D_
 return Object.fromEntries(Object.entries(obj).concat([['key3','abc']]))_x000D_
}_x000D_
_x000D_
_x000D_
_x000D_
log('MA',MA);_x000D_
log('MB',MB);_x000D_
log('MC',MC);_x000D_
log('MD',MD);_x000D_
log('IA',IA);_x000D_
log('IB',IB);_x000D_
log('IC',IC);_x000D_
log('ID',ID);_x000D_
log('IE',IE);

_x000D_

This snippet only presents code - it not perform tests itself!

_x000D_

Angular2 handling http response

in angular2 2.1.1 I was not able to catch the exception using the (data),(error) pattern, so I implemented it using .catch(...).

It's nice because it can be used with all other Observable chained methods like .retry .map etc.

import {Observable} from 'rxjs/Rx';


  Http
  .put(...)
  .catch(err =>  { 
     notify('UI error handling');
     return Observable.throw(err); // observable needs to be returned or exception raised
  })
  .subscribe(data => ...) // handle success

from documentation:

Returns

(Observable): An observable sequence containing elements from consecutive source sequences until a source sequence terminates successfully.

Finding what branch a Git commit came from

TL;DR:

Use the below if you care about shell exit statuses:

branch-current - the current branch's name
branch-names - clean branch names (one per line)
branch-name - Ensure that only one branch is returned from branch-names

Both branch-name and branch-names accept a commit as the argument, and default to HEAD if none is given.

Aliases useful in scripting

branch-current = "symbolic-ref --short HEAD"  # https://stackoverflow.com/a/19585361/5353461
branch-names = !"[ -z \"$1\" ] && git branch-current 2>/dev/null || git branch --format='%(refname:short)' --contains \"${1:-HEAD}\" #"  # https://stackoverflow.com/a/19585361/5353461
branch-name = !"br=$(git branch-names \"$1\") && case \"$br\" in *$'\\n'*) printf \"Multiple branches:\\n%s\" \"$br\">&2; exit 1;; esac; echo \"$br\" #"

Commit only reachable from only one branch

% git branch-name eae13ea
master
% echo $?
0

Output is to STDOUT
Exit value is 0.

Commit reachable from multiple branches

% git branch-name 4bc6188
Multiple branches:
attempt-extract
master%
% echo $?
1

Output is to STDERR
The exit value is 1.

Because of the exit status, these can be safely built upon. For example, to get the remote used for fetching:

remote-fetch = !"branch=$(git branch-name \"$1\") && git config branch.\"$branch\".remote || echo origin #"

Deactivate or remove the scrollbar on HTML

put this code in your html header:

<style type="text/css">
html {
        overflow: auto;
}
</style>

CSS Background Opacity

Just make sure to put width and height for the foreground the same with the background, or try to have top, bottom, left and right properties.

<style>
    .foreground, .background {
        position: absolute;
    }
    .foreground {
        z-index: 1;
    }
    .background {
        background-image: url(your/image/here.jpg);
        opacity: 0.4;
    }
</style>

<div class="foreground"></div>
<div class="background"></div>

How to convert JSON string to array

$data = json_encode($result, true);

echo $data;

jQuery UI dialog positioning

$("#myid").dialog({height:"auto",
        width:"auto",
        show: {effect: 'fade', speed: 1000},
        hide: {effect: 'fade', speed: 1000},
        open: function( event, ui ) {
          $("#myid").closest("div[role='dialog']").css({top:100,left:100});              
         }
    });

How to serialize a JObject without the formatting?

you can use JsonConvert.SerializeObject()

JsonConvert.SerializeObject(myObject) // myObject is returned by JObject.Parse() method

JsonConvert.SerializeObject()

JObject.Parse()

VBA - Select columns using numbers?

Columns("A:E").Select

Can be directly replaced by

Columns(1).Resize(, 5).EntireColumn.Select

Where 1 can be replaced by a variable

n = 5
Columns(n).Resize(, n+4).EntireColumn.Select

In my opinion you are best dealing with a block of columns rather than looping through columns n to n + 4 as it is more efficient.

In addition, using select will slow your code down. So instead of selecting your columns and then performing an action on the selection try instead to perform the action directly. Below is an example to change the colour of columns A-E to yellow.

Columns(1).Resize(, 5).EntireColumn.Interior.Color = 65535

COPY with docker but with exclusion

Adding .dockerignore works for me. One additional point Those who are trying this solution on Windows , windows will not let you create .dockerignore file (as it doesn't by default allows creating file starting with .)

To create such file starting with . on Windows, include an ending dot also, like : .dockerignore. and hit enter ( provided you have enabled view extension options from folder options )

How do I read the source code of shell commands?

Actually more sane sources are provided by http://suckless.org look at their sbase repository:

git clone git://git.suckless.org/sbase

They are clearer, smarter, simpler and suckless, eg ls.c has just 369 LOC

After that it will be easier to understand more complicated GNU code.

HTTP POST with URL query parameters -- good idea or not?

It would be fine to use query parameters on a POST endpoint, provided they refer to already existing resources.

For example:

POST /user_settings?user_id=4
{
  "use_safe_mode": 1
}

The POST above has a query parameter referring to an existing resource. The body parameter defines the new resource to be created.

(Granted, this may be more of a personal preference than a dogmatic principle.)

C/C++ Struct vs Class

I'm going to add to the existing answers because modern C++ is now a thing and official Core Guidelines have been created to help with questions such as these.

Here's a relevant section from the guidelines:

C.2: Use class if the class has an invariant; use struct if the data members can vary independently

An invariant is a logical condition for the members of an object that a constructor must establish for the public member functions to assume. After the invariant is established (typically by a constructor) every member function can be called for the object. An invariant can be stated informally (e.g., in a comment) or more formally using Expects.

If all data members can vary independently of each other, no invariant is possible.

If a class has any private data, a user cannot completely initialize an object without the use of a constructor. Hence, the class definer will provide a constructor and must specify its meaning. This effectively means the definer need to define an invariant.

Enforcement

Look for structs with all data private and classes with public members.

The code examples given:

struct Pair {  // the members can vary independently
    string name;
    int volume;
};

// but

class Date {
public:
    // validate that {yy, mm, dd} is a valid date and initialize
    Date(int yy, Month mm, char dd);
    // ...
private:
    int y;
    Month m;
    char d;    // day
};

Classes work well for members that are, for example, derived from each other or interrelated. They can also help with sanity checking upon instantiation. Structs work well for having "bags of data", where nothing special is really going on but the members logically make sense being grouped together.

From this, it makes sense that classes exist to support encapsulation and other related coding concepts, that structs are simply not very useful for.

When and why to 'return false' in JavaScript?

When using jQuery's each function, returning true or false has meaning. See the doc

Can I stretch text using CSS?

I'll answer for horizontal stretching of text, since the vertical is the easy part - just use "transform: scaleY()"

_x000D_

.stretched-text {
  letter-spacing: 2px;
  display: inline-block;
  font-size: 32px;
  transform: scaleY(0.5);
  transform-origin: 0 0;
  margin-bottom: -50%;
}
span {
  font-size: 16px;
  vertical-align: top;
}

_x000D_

<span class="stretched-text">this is some stretched text</span>
<span>and this is some random<br />triple line <br />not stretched text</span>

_x000D_

letter-spacing just adds space between letters, stretches nothing, but it's kinda relative

inline-block because inline elements are too restrictive and the code below wouldn't work otherwise

Now the combination that makes the difference

font-size to get to the size we want - that way the text will really be of the length it's supposed to be and the text before and after it will appear next to it (scaleX is just for show, the browser still sees the element at its original size when positioning other elements).

scaleY to reduce the height of the text, so that it's the same as the text beside it.

transform-origin to make the text scale from the top of the line.

margin-bottom set to a negative value, so that the next line will not be far below - preferably percentage, so that we won't change the line-height property. vertical-align set to top, to prevent the text before or after from floating to other heights (since the stretched text has a real size of 32px)

-- The simple span element has a font-size, only as a reference.

The question asked for a way to prevent the boldness of the text caused by the stretch and I still haven't given one, BUT the font-weight property has more values than just normal and bold.

I know, you just can't see that, but if you search for the appropriate fonts, you can use the more values.

Regular Expression For Duplicate Words

Use this in case you want case-insensitive checking for duplicate words.

(?i)\\b(\\w+)\\s+\\1\\b

Python truncate a long string

Here's a function I made as part of a new String class... It allows adding a suffix ( if the string is size after trimming and adding it is long enough - although you don't need to force the absolute size )

I was in the process of changing a few things around so there are some useless logic costs ( if _truncate ... for instance ) where it is no longer necessary and there is a return at the top...

But, it is still a good function for truncating data...

##
## Truncate characters of a string after _len'nth char, if necessary... If _len is less than 0, don't truncate anything... Note: If you attach a suffix, and you enable absolute max length then the suffix length is subtracted from max length... Note: If the suffix length is longer than the output then no suffix is used...
##
## Usage: Where _text = 'Testing', _width = 4
##      _data = String.Truncate( _text, _width )                        == Test
##      _data = String.Truncate( _text, _width, '..', True )            == Te..
##
## Equivalent Alternates: Where _text = 'Testing', _width = 4
##      _data = String.SubStr( _text, 0, _width )                       == Test
##      _data = _text[  : _width ]                                      == Test
##      _data = ( _text )[  : _width ]                                  == Test
##
def Truncate( _text, _max_len = -1, _suffix = False, _absolute_max_len = True ):
    ## Length of the string we are considering for truncation
    _len            = len( _text )

    ## Whether or not we have to truncate
    _truncate       = ( False, True )[ _len > _max_len ]

    ## Note: If we don't need to truncate, there's no point in proceeding...
    if ( not _truncate ):
        return _text

    ## The suffix in string form
    _suffix_str     = ( '',  str( _suffix ) )[ _truncate and _suffix != False ]

    ## The suffix length
    _len_suffix     = len( _suffix_str )

    ## Whether or not we add the suffix
    _add_suffix     = ( False, True )[ _truncate and _suffix != False and _max_len > _len_suffix ]

    ## Suffix Offset
    _suffix_offset = _max_len - _len_suffix
    _suffix_offset  = ( _max_len, _suffix_offset )[ _add_suffix and _absolute_max_len != False and _suffix_offset > 0 ]

    ## The truncate point.... If not necessary, then length of string.. If necessary then the max length with or without subtracting the suffix length... Note: It may be easier ( less logic cost ) to simply add the suffix to the calculated point, then truncate - if point is negative then the suffix will be destroyed anyway.
    ## If we don't need to truncate, then the length is the length of the string.. If we do need to truncate, then the length depends on whether we add the suffix and offset the length of the suffix or not...
    _len_truncate   = ( _len, _max_len )[ _truncate ]
    _len_truncate   = ( _len_truncate, _max_len )[ _len_truncate <= _max_len ]

    ## If we add the suffix, add it... Suffix won't be added if the suffix is the same length as the text being output...
    if ( _add_suffix ):
        _text = _text[ 0 : _suffix_offset ] + _suffix_str + _text[ _suffix_offset: ]

    ## Return the text after truncating...
    return _text[ : _len_truncate ]

Error message "Unable to install or run the application. The application requires stdole Version 7.0.3300.0 in the GAC"

Try going to the Publish tab in the project properties and then select the Application Files button. Then set the following properties:

File Name of stdole.dll
Publish status to Include
Download Group to Required

After that you need to republish your application.

If the reference has CopyLocal=true, then the reference will be published with the application. If the reference has CopyLocal=false then the reference will be marked as a prerequisite. This means the assembly must be installed in the client's GAC before the ClickOnce application will install.

There are some assemblies that are installed into the GAC because of the Visual Studio install, not the .NET Framework install. This could be your situation.

How to compare two dates to find time difference in SQL Server 2005, date manipulation

I used following logic and it worked for me like marvel:

CONVERT(TIME, DATEADD(MINUTE, DATEDIFF(MINUTE, AP.Time_IN, AP.Time_OUT), 0))

Setting focus to iframe contents

Try listening for events in the parent document and passing the event to a handler in the iframe document.

How do I enable TODO/FIXME/XXX task tags in Eclipse?

All those settings are necessary to choose which tags you are interested in, but in order to display these tags in a list, you also need to select the right Eclipse perspective. I finally discovered that the "Markers" tab containing the "Task" list is only available under the "Java EE" perspective... Hope this helps! :-)

Open Redis port for remote connections

1- Comment out bind 127.0.0.1

2- set requirepass yourpassword

then check if the firewall blocked your port

iptables -L -n

service iptables stop

SELECT CONVERT(VARCHAR(10), GETDATE(), 110) what is the meaning of 110 here?

10 = mm-dd-yy 110 = mm-dd-yyyy

SQL Server CONVERT() Function

Set line height in Html <p> to make the html looks like a office word when <p> has different font sizes

Actually, you can achieve this pretty easy. Simply specify the line height as a number:

<p style="line-height:1.5">
    <span style="font-size:12pt">The quick brown fox jumps over the lazy dog.</span><br />
    <span style="font-size:24pt">The quick brown fox jumps over the lazy dog.</span>
</p>

The difference between number and percentage in the context of the line-height CSS property is that the number value is inherited by the descendant elements, but the percentage value is first computed for the current element using its font size and then this computed value is inherited by the descendant elements.

For more information about the line-height property, which indeed is far more complex than it looks like at first glance, I recommend you take a look at this online presentation.

Add a column with a default value to an existing table in SQL Server

ALTER TABLE tbl_table ADD int_column int NOT NULL DEFAULT(0)

From this query you can add a column of datatype integer with default value 0.

SQL Server: Get data for only the past year

argument for DATEADD function :

DATEADD (*datepart* , *number* , *date* )

datepart can be: yy, qq, mm, dy, dd, wk, dw, hh, mi, ss, ms

number is an expression that can be resolved to an int that is added to a datepart of date

date is an expression that can be resolved to a time, date, smalldatetime, datetime, datetime2, or datetimeoffset value.

Make the current Git branch a master branch

To add to Jefromi's answer, if you don't want to place a meaningless merge in the history of the source branch, you can create a temporary branch for the ours merge, then throw it away:

git checkout <source>
git checkout -b temp            # temporary branch for merge
git merge -s ours <target>      # create merge commit with contents of <source>
git checkout <target>           # fast forward <target> to merge commit
git merge temp                  # ...
git branch -d temp              # throw temporary branch away

That way the merge commit will only exist in the history of the target branch.

Alternatively, if you don't want to create a merge at all, you can simply grab the contents of source and use them for a new commit on target:

git checkout <source>                          # fill index with contents of <source>
git symbolic-ref HEAD <target>                 # tell git we're committing on <target>
git commit -m "Setting contents to <source>"   # make an ordinary commit with the contents of <source>

What does it mean to "program to an interface"?

C++ explanation.

Think of an interface as your classes public methods.

You then could create a template that 'depends' on these public methods in order to carry out it's own function (it makes function calls defined in the classes public interface). Lets say this template is a container, like a Vector class, and the interface it depends on is a search algorithm.

Any algorithm class that defines the functions/interface Vector makes calls to will satisfy the 'contract' (as someone explained in the original reply). The algorithms don't even need to be of the same base class; the only requirement is that the functions/methods that the Vector depends on (interface) is defined in your algorithm.

The point of all of this is that you could supply any different search algorithm/class just as long as it supplied the interface that Vector depends on (bubble search, sequential search, quick search).

You might also want to design other containers (lists, queues) that would harness the same search algorithm as Vector by having them fulfill the interface/contract that your search algorithms depends on.

This saves time (OOP principle 'code reuse') as you are able to write an algorithm once instead of again and again and again specific to every new object you create without over-complicating the issue with an overgrown inheritance tree.

As for 'missing out' on how things operate; big-time (at least in C++), as this is how most of the Standard TEMPLATE Library's framework operates.

Of course when using inheritance and abstract classes the methodology of programming to an interface changes; but the principle is the same, your public functions/methods are your classes interface.

This is a huge topic and one of the the cornerstone principles of Design Patterns.

Getting value from appsettings.json in .net core

This tends to happen particularly with vscode as I'd assume because of how one configures the launch.json.

Based on this answer I had to reconfigure the base path the configuration is being searched for to that of DLL's path, and since the default setting was optional it was hard to track this down on a .net core 3.1 & net 5.0 app. Here's how I've reconfigured

Program.cs:

using System;
using System.IO;
using System.Reflection;
using Microsoft.Extensions.Configuration;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Hosting;

namespace API
{
    public class Program
    {
        public static int Main(string[] args)
        {
            CreateHostBuilder(args).Build().Run();
            return 0;
        }

        public static IHostBuilder CreateHostBuilder(string[] args)
        {
            return Host.CreateDefaultBuilder(args)
            .ConfigureAppConfiguration(c =>
            {
                var codeBase = Assembly.GetExecutingAssembly().Location;
                var uri = new UriBuilder(codeBase);
                var path = Uri.UnescapeDataString(uri.Path);
                var assembyDirectory = Path.GetDirectoryName(path);
                c.SetBasePath(assembyDirectory);
            })
            .ConfigureWebHostDefaults(webBuilder =>
            {
                webBuilder.UseStartup<Startup>();
            })
            ;
        }
    }
}

I could access the configuration fine in Startup.cs:

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Model;

namespace API
{
    public class Startup
    {
        public IConfiguration Configuration { get; }

        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            var myOptions = Configuration.To<ApiConfig>();
            services.AddAuthentication(myOptions.Secret);
            services.AddControllers();
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            app.UseRouting();
            app.UseAuthentication();
            app.UseAuthorization();
            app.UseEndpoints(endpoints => { endpoints.MapControllers(); });
        }
    }
}

Ruby sleep or delay less than a second?

Pass float to sleep, like sleep 0.1

How to unpublish an app in Google Play Developer Console

The new version is hard to find. Select the app, then look for "3 dot menu" in upper right corner.

Regex to match only uppercase "words" with some exceptions

Why do you need to do this in one monster-regex? You can use actual code to implement some of these rules, and doing so would be much easier to modify if those requirements change later.

For example:

if(/^[A-Z0-9\s]*$/)
    # sentence is all uppercase, so just fail out
    return 0;

# Carry on with matching uppercase terms

Reading value from console, interactively

Easiest way is to use readline-sync

It process one by one input and out put.

npm i readline-sync

eg:

var firstPrompt = readlineSync.question('Are you sure want to initialize new db? This will drop whole database and create new one, Enter: (yes/no) ');

if (firstPrompt === 'yes') {
    console.log('--firstPrompt--', firstPrompt)
    startProcess()
} else if (firstPrompt === 'no') {
    var secondPrompt = readlineSync.question('Do you want to modify migration?, Enter: (yes/no) ');
    console.log('secondPrompt ', secondPrompt)
    startAnother()
} else {
    console.log('Invalid Input')
    process.exit(0)
}

How to establish a connection pool in JDBC?

Usually if you need a connection pool you are writing an application that runs in some managed environment, that is you are running inside an application server. If this is the case be sure to check what connection pooling facilities your application server providesbefore trying any other options.

The out-of-the box solution will be the best integrated with the rest of the application servers facilities. If however you are not running inside an application server I would recommend the Apache Commons DBCP Component. It is widely used and provides all the basic pooling functionality most applications require.

How to change fontFamily of TextView in Android

You set style in res/layout/value/style.xml like that:

<style name="boldText">
    <item name="android:textStyle">bold|italic</item>
    <item name="android:textColor">#FFFFFF</item>
</style>

and to use this style in main.xml file use:

style="@style/boldText"

UnicodeDecodeError when reading CSV file in Pandas with Python

Sometimes the problem is with the .csv file only. The file may be corrupted. When faced with this issue. 'Save As' the file as csv again.

0. Open the xls/csv file
1. Go to -> files 
2. Click -> Save As 
3. Write the file name 
4. Choose 'file type' as -> CSV [very important]
5. Click -> Ok

How to count no of lines in text file and store the value into a variable using batch script?

The :countLines subroutine below accepts two parameters: a variable name; and a filename. The number of lines in the file are counted, the result is stored in the variable, and the result is passed back to the main program.

The code has the following features:

Reads files with Windows or Unix line endings.
Handles Unicode as well as ANSI/ASCII text files.
Copes with extremely long lines.
Isn’t fazed by the null character.
Raises an error on reading an empty file.
Counts beyond the Batch max int limit of (31^2)-1.

@echo off & setLocal enableExtensions disableDelayedExpansion

call :countLines noOfLines "%~1" || (
    >&2 echo(file "%~nx1" is empty & goto end
) %= cond exec =%
echo(file "%~nx1" has %noOfLines% line(s)

:end - exit program with appropriate errorLevel
endLocal & goto :EOF

:countLines result= "%file%"
:: counts the number of lines in a file
setLocal disableDelayedExpansion
(set "lc=0" & call)

for /f "delims=:" %%N in ('
    cmd /d /a /c type "%~2" ^^^& ^<nul set /p "=#" ^| (^
    2^>nul findStr /n "^" ^&^& echo(^) ^| ^
    findStr /blv 1: ^| 2^>nul findStr /lnxc:" "
') do (set "lc=%%N" & call;) %= for /f =%

endlocal & set "%1=%lc%"
exit /b %errorLevel% %= countLines =%

I know it looks hideous, but it covers most edge-cases and is surprisingly fast.

How do I use the Tensorboard callback of Keras?

There are few things.

First, not /Graph but ./Graph

Second, when you use the TensorBoard callback, always pass validation data, because without it, it wouldn't start.

Third, if you want to use anything except scalar summaries, then you should only use the fit method because fit_generator will not work. Or you can rewrite the callback to work with fit_generator.

To add callbacks, just add it to model.fit(..., callbacks=your_list_of_callbacks)

How to group dataframe rows into list in pandas groupby

Let us using df.groupby with list and Series constructor

pd.Series({x : y.b.tolist() for x , y in df.groupby('a')})
Out[664]: 
A       [1, 2]
B    [5, 5, 4]
C          [6]
dtype: object

Fatal error: Maximum execution time of 30 seconds exceeded

I have same problem in WordPress site, I added in .htaccess file then working fine for me.

php_value max_execution_time 6000000

How to provide shadow to Button

Here is my button with shadow cw_button_shadow.xml inside drawable folder

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="false">
        <layer-list>
            <!-- SHADOW -->
            <item>
                <shape>
                    <solid android:color="@color/red_400"/>
                    <!-- alttan gölge -->
                    <corners android:radius="19dp"/>
                </shape>
            </item>
            <!-- BUTTON alttan gölge
              android:right="5px" to make it round-->
            <item
                android:bottom="5px"
                >
                <shape>
                    <padding android:bottom="5dp"/>
                    <gradient
                        android:startColor="#1c4985"
                        android:endColor="#163969"
                        android:angle="270" />
                    <corners
                        android:radius="19dp"/>
                    <padding
                        android:left="10dp"
                        android:top="10dp"
                        android:right="5dp"
                        android:bottom="10dp"/>
                </shape>
            </item>
        </layer-list>
    </item>

    <item android:state_pressed="true">
        <layer-list>
            <!-- SHADOW -->
            <item>
                <shape>
                    <solid android:color="#102746"/>
                    <corners android:radius="19dp"/>

                </shape>
            </item>
            <!-- BUTTON -->
            <item android:bottom="5px">
                <shape>
                    <padding android:bottom="5dp"/>
                    <gradient
                        android:startColor="#1c4985"
                        android:endColor="#163969"
                        android:angle="270" />
                    <corners
                        android:radius="19dp"/>
                    <padding
                        android:left="10dp"
                        android:top="10dp"
                        android:right="5dp"
                        android:bottom="10dp"/>
                </shape>
            </item>
        </layer-list>
    </item>
</selector>

How to use. in Button xml, you can resize your height and weight

<Button
                android:text="+ add friends"
                android:layout_width="120dp"
                android:layout_height="40dp"
               android:background="@drawable/cw_button_shadow" />

How to select Python version in PyCharm?

Go to:

Files -> Settings -> Project -> *"Your Project Name"* -> Project Interpreter

There you can see which external libraries you have installed for python2 and which for python3.

Select the required python version according to your requirements.

How to delete images from a private docker registry?

This is really ugly but it works, text is tested on registry:2.5.1. I did not manage to get delete working smoothly even after updating configuration to enable delete. The ID was really difficult to retrieve, had to login to get it, maybe some misunderstanding. Anyway, the following works:

Login to the container
```
docker exec -it registry sh
```
Define variables matching your container and container version:
```
export NAME="google/cadvisor"
export VERSION="v0.24.1"
```

Move to the the registry directory:

cd /var/lib/registry/docker/registry/v2

Delete files related to your hash:

find . | grep `ls ./repositories/$NAME/_manifests/tags/$VERSION/index/sha256`| xargs rm -rf $1

Delete manifests:

rm -rf ./repositories/$NAME/_manifests/tags/$VERSION

Logout
```
exit
```

Run the GC:

docker exec -it registry  bin/registry garbage-collect  /etc/docker/registry/config.yml

If all was done properly some information about deleted blobs is shown.

Why am I getting a "401 Unauthorized" error in Maven?

Faced same issue. In my case the reason was pretty stupid - github token I used for authorization was issued for the organization that doesn't own the repo I tried to publish into. So check repo title and ownership.

How to read from a file or STDIN in Bash?

Code ${1:-/dev/stdin} will just understand first argument, so, how about this.

ARGS='$*'
if [ -z "$*" ]; then
  ARGS='-'
fi
eval "cat -- $ARGS" | while read line
do
   echo "$line"
done

$(document).ready equivalent without jQuery

Three options:

If script is the last tag of the body, the DOM would be ready before script tag executes
When the DOM is ready, "readyState" will change to "complete"
Put everything under 'DOMContentLoaded' event listener

onreadystatechange

  document.onreadystatechange = function () {
     if (document.readyState == "complete") {
     // document is ready. Do your stuff here
   }
 }

Source: MDN

DOMContentLoaded

document.addEventListener('DOMContentLoaded', function() {
   console.log('document is ready. I can sleep now');
});

Concerned about stone age browsers: Go to the jQuery source code and use the ready function. In that case you are not parsing+executing the whole library you're are doing only a very small part of it.

How to measure time taken between lines of code in python?

Putting the code in a function, then using a decorator for timing is another option. (Source) The advantage of this method is that you define timer once and use it with a simple additional line for every function.

First, define timer decorator:

import functools
import time

def timer(func):
    @functools.wraps(func)
    def wrapper(*args, **kwargs):
        start_time = time.perf_counter()
        value = func(*args, **kwargs)
        end_time = time.perf_counter()
        run_time = end_time - start_time
        print("Finished {} in {} secs".format(repr(func.__name__), round(run_time, 3)))
        return value

    return wrapper

Then, use the decorator while defining the function:

@timer
def doubled_and_add(num):
    res = sum([i*2 for i in range(num)])
    print("Result : {}".format(res))

Let's try:

doubled_and_add(100000)
doubled_and_add(1000000)

Output:

Result : 9999900000
Finished 'doubled_and_add' in 0.0119 secs
Result : 999999000000
Finished 'doubled_and_add' in 0.0897 secs

Note: I'm not sure why to use time.perf_counter instead of time.time. Comments are welcome.

how to get the value of css style using jquery

Yes, you're right. With the css() method you can retrieve the desired css value stored in the DOM. You can read more about this at: http://api.jquery.com/css/

But if you want to get its position you can check offset() and position() methods to get it's position.

What is the best way to parse html in C#?

I found a project called Fizzler that takes a jQuery/Sizzler approach to selecting HTML elements. It's based on HTML Agility Pack. It's currently in beta and only supports a subset of CSS selectors, but it's pretty damn cool and refreshing to use CSS selectors over nasty XPath.

http://code.google.com/p/fizzler/

change values in array when doing foreach

With the Array object methods you can modify the Array content yet compared to the basic for loops, these methods lack one important functionality. You can not modify the index on the run.

For example if you will remove the current element and place it to another index position within the same array you can easily do this. If you move the current element to a previous position there is no problem in the next iteration you will get the same next item as if you hadn't done anything.

Consider this code where we move the item at index position 5 to index position 2 once the index counts up to 5.

var ar = [0,1,2,3,4,5,6,7,8,9];
ar.forEach((e,i,a) => {
i == 5 && a.splice(2,0,a.splice(i,1)[0])
console.log(i,e);
}); // 0 0 - 1 1 - 2 2 - 3 3 - 4 4 - 5 5 - 6 6 - 7 7 - 8 8 - 9 9

However if we move the current element to somewhere beyond the current index position things get a little messy. Then the very next item will shift into the moved items position and in the next iteration we will not be able to see or evaluate it.

Consider this code where we move the item at index position 5 to index position 7 once the index counts up to 5.

var a = [0,1,2,3,4,5,6,7,8,9];
a.forEach((e,i,a) => {
i == 5 && a.splice(7,0,a.splice(i,1)[0])
console.log(i,e);
}); // 0 0 - 1 1 - 2 2 - 3 3 - 4 4 - 5 5 - 6 7 - 7 5 - 8 8 - 9 9

So we have never met 6 in the loop. Normally in a for loop you are expected decrement the index value when you move the array item forward so that your index stays at the same position in the next run and you can still evaluate the item shifted into the removed item's place. This is not possible with array methods. You can not alter the index. Check the following code

var a = [0,1,2,3,4,5,6,7,8,9];
a.forEach((e,i,a) => {
i == 5 && (a.splice(7,0,a.splice(i,1)[0]), i--);
console.log(i,e);
}); // 0 0 - 1 1 - 2 2 - 3 3 - 4 4 - 4 5 - 6 7 - 7 5 - 8 8 - 9 9

As you see when we decrement i it will not continue from 5 but 6, from where it was left.

So keep this in mind.

How do I lock the orientation to portrait mode in a iPhone Web Application?

I like the idea of telling the user to put his phone back into portrait mode. Like it's mentioned here: http://tech.sarathdr.com/featured/prevent-landscape-orientation-of-iphone-web-apps/ ...but utilising CSS instead of JavaScript.

converting json to string in python

json.dumps() is much more than just making a string out of a Python object, it would always produce a valid JSON string (assuming everything inside the object is serializable) following the Type Conversion Table.

For instance, if one of the values is None, the str() would produce an invalid JSON which cannot be loaded:

>>> data = {'jsonKey': None}
>>> str(data)
"{'jsonKey': None}"
>>> json.loads(str(data))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/__init__.py", line 338, in loads
    return _default_decoder.decode(s)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/decoder.py", line 366, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/decoder.py", line 382, in raw_decode
    obj, end = self.scan_once(s, idx)
ValueError: Expecting property name: line 1 column 2 (char 1)

But the dumps() would convert None into null making a valid JSON string that can be loaded:

>>> import json
>>> data = {'jsonKey': None}
>>> json.dumps(data)
'{"jsonKey": null}'
>>> json.loads(json.dumps(data))
{u'jsonKey': None}

Using SUMIFS with multiple AND OR conditions

With the following, it is easy to link the Cell address...

=SUM(SUMIFS(FAGLL03!$I$4:$I$1048576,FAGLL03!$A$4:$A$1048576,">="&INDIRECT("A"&ROW()),FAGLL03!$A$4:$A$1048576,"<="&INDIRECT("B"&ROW()),FAGLL03!$Q$4:$Q$1048576,E$2))

Can use address / substitute / Column functions as required to use Cell addresses in full DYNAMIC.

How can I get an int from stdio in C?

The typical way is with scanf:

int input_value;

scanf("%d", &input_value);

In most cases, however, you want to check whether your attempt at reading input succeeded. scanf returns the number of items it successfully converted, so you typically want to compare the return value against the number of items you expected to read. In this case you're expecting to read one item, so:

if (scanf("%d", &input_value) == 1)
    // it succeeded
else
    // it failed

Of course, the same is true of all the scanf family (sscanf, fscanf and so on).

How to switch position of two items in a Python list?

I am not an expert in python but you could try: say

i = (1,2)

res = lambda i: (i[1],i[0])
print 'res(1, 2) = {0}'.format(res(1, 2))

above would give o/p as:

res(1, 2) = (2,1)

Dynamically change bootstrap progress bar value when checkboxes checked

Bootstrap 4 progress bar

<div class="progress">
<div class="progress-bar" role="progressbar" style="" aria-valuenow="" aria-valuemin="0" aria-valuemax="100"></div>
</div>

Javascript

change progress bar on next/previous page actions

var count = Number(document.getElementById('count').innerHTML); //set this on page load in a hidden field after an ajax call
var total = document.getElementById('total').innerHTML; //set this on initial page load
var pcg = Math.floor(count/total*100);        
document.getElementsByClassName('progress-bar').item(0).setAttribute('aria-valuenow',pcg);
document.getElementsByClassName('progress-bar').item(0).setAttribute('style','width:'+Number(pcg)+'%');

What is the closest thing Windows has to fork()?

There is no easy way to emulate fork() on Windows.

I suggest you to use threads instead.

iOS Launching Settings -> Restrictions URL Scheme

I am updating one news here. Using 'prefs:' only is NOT rejected by Apple, I tested it and checked approved to the app store(in Aug, 2016). thx.

How long will my session last?

In general you can say session.gc_maxlifetime specifies the maximum lifetime since the last change of your session data (not the last time session_start was called!). But PHP’s session handling is a little bit more complicated.

Because the session data is removed by a garbage collector that is only called by session_start with a probability of session.gc_probability devided by session.gc_divisor. The default values are 1 and 100, so the garbage collector is only started in only 1% of all session_start calls. That means even if the the session is already timed out in theory (the session data had been changed more than session.gc_maxlifetime seconds ago), the session data can be used longer than that.

Because of that fact I recommend you to implement your own session timeout mechanism. See my answer to How do I expire a PHP session after 30 minutes? for more details.

Android Material and appcompat Manifest merger failed

Simple Solutions - migrate into AndroidX

in the gradle.properties, just add below two scripts

android.useAndroidX=true
android.enableJetifier=true

What was the reason ?

All packages in AndroidX live in a consistent namespace starting with the string androidx. The Support Library packages have been mapped into the corresponding androidx.* packages. For a full mapping of all the old classes and build artifacts to the new ones, see the Package Refactoring page.

Please see the Package Refactoring page

Animation CSS3: display + opacity

There is another good method to get this done by using pointer-events:

.child {
    opacity: 0;
    pointer-events: none;

    -webkit-transition: opacity 0.5s ease-in-out;
    -moz-transition: opacity 0.5s ease-in-out;
    transition: opacity 0.5s ease-in-out;
}

.parent:hover .child {
    opacity: 0.9;
    pointer-events: all;
}

Unfortunately, this is not supported in IE10 and below.

Mergesort with Python

Here is the CLRS Implementation:

def merge(arr, p, q, r):
    n1 = q - p + 1
    n2 = r - q
    right, left = [], []
    for i in range(n1):
        left.append(arr[p + i])
    for j in range(n2):
        right.append(arr[q + j + 1])
    left.append(float('inf'))
    right.append(float('inf'))
    i = j = 0
    for k in range(p, r + 1):
        if left[i] <= right[j]:
            arr[k] = left[i]
            i += 1
        else:
            arr[k] = right[j]
            j += 1


def merge_sort(arr, p, r):
    if p < r:
        q = (p + r) // 2
        merge_sort(arr, p, q)
        merge_sort(arr, q + 1, r)
        merge(arr, p, q, r)


if __name__ == '__main__':
    test = [5, 2, 4, 7, 1, 3, 2, 6]
    merge_sort(test, 0, len(test) - 1)
    print test

Result:

[1, 2, 2, 3, 4, 5, 6, 7]

In PowerShell, how do I define a function in a file and call it from the PowerShell commandline?

If your file has only one main function that you want to call/expose, then you can also just start the file with:

Param($Param1)

You can then call it e.g. as follows:

.\MyFunctions.ps1 -Param1 'value1'

This makes it much more convenient if you want to easily call just that function without having to import the function.

How to find all duplicate from a List<string>?

I'm assuming each string in your list contains several words, let me know if that's incorrect.

List<string> list = File.RealAllLines("foobar.txt").ToList();

var words = from line in list
            from word in line.Split(new[] { ' ', ';', ',', '.', ':', '(', ')' }, StringSplitOptions.RemoveEmptyEntries)
            select word;

var duplicateWords = from w in words
                     group w by w.ToLower() into g
                     where g.Count() > 1
                     select new
                     {
                         Word = g.Key,
                         Count = g.Count()
                     }

Is the LIKE operator case-sensitive with MSSQL Server?

You can change from the property of every item.

Drop Down Menu/Text Field in one

Inspired by the js fiddle by @ajdeguzman (made my day), here is my node/React derivative:

 <div style={{position:"relative",width:"200px",height:"25px",border:0,
              padding:0,margin:0}}>
    <select style={{position:"absolute",top:"0px",left:"0px",
                    width:"200px",height:"25px",lineHeight:"20px",
                    margin:0,padding:0}} onChange={this.onMenuSelect}>
            <option></option>
            <option value="starttime">Filter by Start Time</option>
            <option value="user"     >Filter by User</option>
            <option value="buildid"  >Filter by Build Id</option>
            <option value="invoker"  >Filter by Invoker</option>
    </select>
    <input name="displayValue" id="displayValue" 
           style={{position:"absolute",top:"2px",left:"3px",width:"180px",
                   height:"21px",border:"1px solid #A9A9A9"}}
           onfocus={this.select} type="text" onChange={this.onIdFilterChange}
           onMouseDown={this.onMouseDown} onMouseUp={this.onMouseUp} 
           placeholder="Filter by Build ID"/>
 </div>

Looks like this:

Adb Devices can't find my phone

I have a Samsung Galaxy and I had the same issue as you. Here's how to fix it:

In device manager on your Windows PC, even though it might say the USB drivers are installed correctly, there may exist corruption.

I went into device manager and uninstalled SAMSUNG Android USB Composite Device and made sure to check the box 'delete driver software'. Now the device will have an exclamation mark etc. I right clicked and installed the driver again (refresh copy). This finally made adb acknowledge my phone as an emulator.

As others noted, for Nexus 4, you can also try this fix.

Syntax for if/else condition in SCSS mixin

You could default the parameter to null or false.
This way, it would be shorter to test if a value has been passed as parameter.

@mixin clearfix($width: null) {

  @if not ($width) {

    // if width is not passed, or empty do this

  } @else {

    display: inline-block;
    width: $width;

  }
}

Concatenating string and integer in python

String formatting, using the new-style .format() method (with the defaults .format() provides):

 '{}{}'.format(s, i)

Or the older, but "still sticking around", %-formatting:

 '%s%d' %(s, i)

In both examples above there's no space between the two items concatenated. If space is needed, it can simply be added in the format strings.

These provide a lot of control and flexibility about how to concatenate items, the space between them etc. For details about format specifications see this.

Dynamically add data to a javascript map

Well any Javascript object functions sort-of like a "map"

randomObject['hello'] = 'world';

Typically people build simple objects for the purpose:

var myMap = {};

// ...

myMap[newKey] = newValue;

edit — well the problem with having an explicit "put" function is that you'd then have to go to pains to avoid having the function itself look like part of the map. It's not really a Javascripty thing to do.

13 Feb 2014 — modern JavaScript has facilities for creating object properties that aren't enumerable, and it's pretty easy to do. However, it's still the case that a "put" property, enumerable or not, would claim the property name "put" and make it unavailable. That is, there's still only one namespace per object.

angularjs make a simple countdown

As of version 1.3 there's a service in module ng: $interval

function countController($scope, $interval){
    $scope.countDown = 10;    
    $interval(function(){console.log($scope.countDown--)},1000,0);
}??

Use with caution:

Note: Intervals created by this service must be explicitly destroyed when you are finished with them. In particular they are not automatically destroyed when a controller's scope or a directive's element are destroyed. You should take this into consideration and make sure to always cancel the interval at the appropriate moment. See the example below for more details on how and when to do this.

From: Angular's official documentation.

How do I get LaTeX to hyphenate a word that contains a dash?

multi\hskip0pt-\hskip0pt disciplinary

You can e.g. define like

\def\:{\hskip0pt}

and then write

multi\:-\:disciplinary

Note that the babel Russian language package has its own set of dashes that do not prohibit hyphenation, "~ (double quotation+tilde) for example.

How to POST JSON request using Apache HttpClient?

As mentioned in the excellent answer by janoside, you need to construct the JSON string and set it as a StringEntity.

To construct the JSON string, you can use any library or method you are comfortable with. Jackson library is one easy example:

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;

ObjectMapper mapper = new ObjectMapper();
ObjectNode node = mapper.createObjectNode();
node.put("name", "value"); // repeat as needed
String JSON_STRING = node.toString();
postMethod.setEntity(new StringEntity(JSON_STRING, ContentType.APPLICATION_JSON));

Remove duplicated rows using dplyr

For completeness’ sake, the following also works:

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

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

how to parse a "dd/mm/yyyy" or "dd-mm-yyyy" or "dd-mmm-yyyy" formatted date string using JavaScript or jQuery

Date.parse recognizes only specific formats, and you don't have the option of telling it what your input format is. In this case it thinks that the input is in the format mm/dd/yyyy, so the result is wrong.

To fix this, you need either to parse the input yourself (e.g. with String.split) and then manually construct a Date object, or use a more full-featured library such as datejs.

Example for manual parsing:

var input = $('#' + controlName).val();
var parts = str.split("/");
var d1 = new Date(Number(parts[2]), Number(parts[1]) - 1, Number(parts[0]));

Example using date.js:

var input = $('#' + controlName).val();
var d1 = Date.parseExact(input, "d/M/yyyy");

Multiple radio button groups in one form

To create a group of inputs you can create a custom html element

window.customElements.define('radio-group', RadioGroup);

https://gist.github.com/robdodson/85deb2f821f9beb2ed1ce049f6a6ed47

to keep selected option in each group, you need to add name attribute to inputs in group, if you not add it then all is one group.

Which equals operator (== vs ===) should be used in JavaScript comparisons?

One unmentioned reason to use === - is in the case that you are co-existing with / cross-compiling to/from coffee-script. From The Little Book on CoffeeScript...

The weak equality comparison in JavaScript has some confusing behavior and is often the source of confusing bugs.

The solution is to instead use the strict equality operator, which consists of three equal signs: ===. It works exactly like the normal equality operator, but without any type coercion. It's recommended to always use the strict equality operator, and explicitly convert types if needs be.

If you are regularly converting to and from coffee-script, you should just use ===. In fact, the coffee-script compiler will force you to...

CoffeeScript solves this by simply replacing all weak comparisons with strict ones, in other words converting all == comparators into ===. You can't do a a weak equality comparison in CoffeeScript, and you should explicitly convert types before comparing them if necessary.

ORA-01653: unable to extend table by in tablespace ORA-06512

You could also turn on autoextend for the whole database using this command:

ALTER DATABASE DATAFILE 'C:\ORACLEXE\APP\ORACLE\ORADATA\XE\SYSTEM.DBF'
AUTOEXTEND ON NEXT 1M MAXSIZE 1024M;

Just change the filepath to point to your system.dbf file.

Credit Here

Collection that allows only unique items in .NET?

You may look into something kind of Unique List as follows

public class UniqueList<T>
{
    public List<T> List
    {
        get;
        private set;
    }
    List<T> _internalList;

    public static UniqueList<T> NewList
    {
        get
        {
            return new UniqueList<T>();
        }
    }

    private UniqueList()
    {            
        _internalList = new List<T>();
        List = new List<T>();
    }

    public void Add(T value)
    {
        List.Clear();
        _internalList.Add(value);
        List.AddRange(_internalList.Distinct());
        //return List;
    }

    public void Add(params T[] values)
    {
        List.Clear();
        _internalList.AddRange(values);
        List.AddRange(_internalList.Distinct());
       // return List;
    }

    public bool Has(T value)
    {
        return List.Contains(value);
    }
}

and you can use it like follows

var uniquelist = UniqueList<string>.NewList;
uniquelist.Add("abc","def","ghi","jkl","mno");
uniquelist.Add("abc","jkl");
var _myList = uniquelist.List;

will only return "abc","def","ghi","jkl","mno" always even when duplicates are added to it

Restoring Nuget References?

I suffered from this issue too a lot, in my case Downloading missing NuGet was checked (but it is not restoring them) and i can not uninstall & re-install because i modified some of the installed packages ... so:

I just cleared the cached and rebuild and it worked. (Tools-Option-Nuget Package Manager - General)

also this link helps https://docs.nuget.org/consume/package-restore/migrating-to-automatic-package-restore.

How to format x-axis time scale values in Chart.js v2

Just set all the selected time unit's displayFormat to MMM DD

options: {
  scales: {
    xAxes: [{
      type: 'time',
      time: {
        displayFormats: {
           'millisecond': 'MMM DD',
           'second': 'MMM DD',
           'minute': 'MMM DD',
           'hour': 'MMM DD',
           'day': 'MMM DD',
           'week': 'MMM DD',
           'month': 'MMM DD',
           'quarter': 'MMM DD',
           'year': 'MMM DD',
        }
        ...

Notice that I've set all the unit's display format to MMM DD. A better way, if you have control over the range of your data and the chart size, would be force a unit, like so

options: {
  scales: {
    xAxes: [{
      type: 'time',
      time: {
        unit: 'day',
        unitStepSize: 1,
        displayFormats: {
           'day': 'MMM DD'
        }
        ...

Fiddle - http://jsfiddle.net/prfd1m8q/

jQuery Determine if a matched class has a given id

Just to say I eventually solved this using index().

NOTHING else seemed to work.

So for sibling elements this is a good work around if you are first selecting by a common class and then want to modify something differently for each specific one.

EDIT: for those who don't know (like me) index() gives an index value for each element that matches the selector, counting from 0, depending on their order in the DOM. As long as you know how many elements there are with class="foo" you don't need an id.

Obviously this won't always help, but someone might find it useful.

How to create a GUID/UUID using iOS

I've uploaded my simple but fast implementation of a Guid class for ObjC here: obj-c GUID

Guid* guid = [Guid randomGuid];
NSLog("%@", guid.description);

It can parse to and from various string formats as well.

Cross Domain Form POSTing

It is possible to build an arbitrary GET or POST request and send it to any server accessible to a victims browser. This includes devices on your local network, such as Printers and Routers.

There are many ways of building a CSRF exploit. A simple POST based CSRF attack can be sent using .submit() method. More complex attacks, such as cross-site file upload CSRF attacks will exploit CORS use of the xhr.withCredentals behavior.

CSRF does not violate the Same-Origin Policy For JavaScript because the SOP is concerned with JavaScript reading the server's response to a clients request. CSRF attacks don't care about the response, they care about a side-effect, or state change produced by the request, such as adding an administrative user or executing arbitrary code on the server.

Make sure your requests are protected using one of the methods described in the OWASP CSRF Prevention Cheat Sheet. For more information about CSRF consult the OWASP page on CSRF.

How to get the list of all database users

EXEC sp_helpuser

SELECT * FROM sysusers

Both of these select all the users of the current database (not the server).

Passing the argument to CMAKE via command prompt

In the CMakeLists.txt file, create a cache variable, as documented here:

SET(FAB "po" CACHE STRING "Some user-specified option")

Source: http://cmake.org/cmake/help/v2.8.8/cmake.html#command:set

Then, either use the GUI (ccmake or cmake-gui) to set the cache variable, or specify the value of the variable on the cmake command line:

cmake -DFAB:STRING=po

Source: http://cmake.org/cmake/help/v2.8.8/cmake.html#opt:-Dvar:typevalue

Modify your cache variable to a boolean if, in fact, your option is boolean.

How to change HTML Object element data attribute value in javascript

document.getElementById("PdfContentArea").setAttribute('data', path);

var objectEl = document.getElementById("PdfContentArea")

objectEl.outerHTML = objectEl.outerHTML.replace(/data="(.+?)"/, 'data="' + path + '"');

How to update Ruby Version 2.0.0 to the latest version in Mac OSX Yosemite?

In case anyone gets the same error I did: “Requirements installation failed with status: 1.” here's what to do:

Install Homebrew (for some reason might not work automatically) with this command:

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

Then proceed to install rvm again using

curl -sSL https://get.rvm.io | bash -s stable --ruby

Quit and reopen Terminal and then:

rvm install 2.2
rvm use 2.2 --default

iOS Swift - Get the Current Local Time and Date Timestamp

in Swift 5

extension Date {
    static var currentTimeStamp: Int64{
        return Int64(Date().timeIntervalSince1970 * 1000)
    }
}

call like this:

let timeStamp = Date.currentTimeStamp
print(timeStamp)

Thanks @lenooh

Adding timestamp to a filename with mv in BASH

First, thanks for the answers above! They lead to my solution.

I added this alias to my .bashrc file:

alias now='date +%Y-%m-%d-%H.%M.%S'

Now when I want to put a time stamp on a file such as a build log I can do this:

mvn clean install | tee build-$(now).log

and I get a file name like:

build-2021-02-04-03.12.12.log

Filter by process/PID in Wireshark

You could match the port numbers from wireshark up to port numbers from, say, netstat which will tell you the PID of a process listening on that port.

How can I edit a view using phpMyAdmin 3.2.4?

In your database table list it should show View in Type column. To edit View:

Click on your View in table list
Click on Structure tab
Click on Edit View under Check All

Hope this help

update: in PHPMyAdmin 4.x, it doesn't show View in Type, but you can still recognize it:

In Row column: It had zero Row
In Action column: It had greyed empty button

Of course it may be just an empty table, but when you open the structure, you will know whether it's a table or a view.

How to delete node from XML file using C#

Deleting nodes from XML

            XmlDocument doc = new XmlDocument();
            doc.Load(path);
            XmlNodeList nodes = doc.SelectNodes("//Setting[@name='File1']");
            for (int i = nodes.Count - 1; i >= 0; i--)
            {
                nodes[i].ParentNode.RemoveChild(nodes[i]);
            }
            doc.Save(path);

Adding attribute to Nodes in XML

    XmlDocument originalXml = new XmlDocument();
    originalXml.Load(path);
    XmlNode menu = originalXml.SelectSingleNode("//Settings");
    XmlNode newSub = originalXml.CreateNode(XmlNodeType.Element, "Setting", null);
    XmlAttribute xa = originalXml.CreateAttribute("name");
    xa.Value = "qwerty";
    XmlAttribute xb = originalXml.CreateAttribute("value");
    xb.Value = "555";
    newSub.Attributes.Append(xa);
    newSub.Attributes.Append(xb);
    menu.AppendChild(newSub);
    originalXml.Save(path);

How to fix the session_register() deprecated issue?

To complement Felix Kling's answer, I was studying a codebase that used to have the following code:

if (is_array($start_vars)) {
    foreach ($start_vars as $var) {
        session_register($var);
    }
} else if (!(empty($start_vars))) {
    session_register($start_vars);
}

In order to not use session_register they made the following adjustments:

if (is_array($start_vars)) {
    foreach ($start_vars as $var) {
        $_SESSION[$var] =  $GLOBALS[$var];
    }
} else if (!(empty($start_vars))) {
    $_SESSION[$start_vars] =  $GLOBALS[$start_vars];
}

How can I detect whether an iframe is loaded?

I imagine this like that:

<html>
<head>
<script>
var frame_loaded = 0;
function setFrameLoaded()
{
   frame_loaded = 1;
   alert("Iframe is loaded");
}
$('#click').click(function(){
   if(frame_loaded == 1)
    console.log('iframe loaded')
   } else {
    console.log('iframe not loaded')
   }
})
</script>
</head>
<button id='click'>click me</button>

<iframe id='MainPopupIframe' onload='setFrameLoaded();' src='http://...' />...</iframe>

Datagridview: How to set a cell in editing mode?

private void DgvRoomInformation_CellEnter(object sender, DataGridViewCellEventArgs e)
{
  if (DgvRoomInformation.CurrentCell.ColumnIndex == 4)  //example-'Column index=4'
  {
    DgvRoomInformation.BeginEdit(true);   
  }
}

Generate pdf from HTML in div using Javascript

No depenencies, pure JS
To add CSS or images - do not use relative URLs, use full URLs http://...domain.../path.css or so. It creates separate HTML document and it has no context of main thing.
you can also embed images as base64

This served me for years now:

export default function printDiv({divId, title}) {
  let mywindow = window.open('', 'PRINT', 'height=650,width=900,top=100,left=150');

  mywindow.document.write(`<html><head><title>${title}</title>`);
  mywindow.document.write('</head><body >');
  mywindow.document.write(document.getElementById(divId).innerHTML);
  mywindow.document.write('</body></html>');

  mywindow.document.close(); // necessary for IE >= 10
  mywindow.focus(); // necessary for IE >= 10*/

  mywindow.print();
  mywindow.close();

  return true;
}

Programs & Examples On #Erlang ports

Alternative for frames in html5 using iframes

Elastic Search: how to see the indexed data

Encrypt & Decrypt using PyCrypto AES 256

Most concise way to test string equality (not object equality) for Ruby strings or symbols?

How to change TIMEZONE for a java.util.Calendar/Date

ld cannot find an existing library

UITextField text change event

What is the easiest way to remove the first character from a string?

Change color when hover a font awesome icon?

How do I install PIL/Pillow for Python 3.6?

Does Python have a package/module management system?

How to get a cookie from an AJAX response?

Update

Regular expression to return text between parenthesis

Making an image act like a button

C# Copy a file to another location with a different name

How do I install pip on macOS or OS X?

Convert a hexadecimal string to an integer efficiently in C?

why windows 7 task scheduler task fails with error 2147942667

Access restriction: The type 'Application' is not API (restriction on required library rt.jar)

How to add onload event to a div element

Python "SyntaxError: Non-ASCII character '\xe2' in file"

Remap values in pandas column with a dict

MySQL - how to front pad zip code with "0"?

How to check version of a CocoaPods framework

How to fix missing dependency warning when using useEffect React Hook?

How to detect scroll position of page using jQuery

How To Remove Outline Border From Input Button

c# why can't a nullable int be assigned null as a value

How can I implement the Iterable interface?

What does "TypeError 'xxx' object is not callable" means?

Turn off axes in subplots

TypeError: 'bool' object is not callable

Import-Module : The specified module 'activedirectory' was not loaded because no valid module file was found in any module directory

Setting an image button in CSS - image:active

angular 2 sort and filter

Undefined reference to pthread_create in Linux

How do you post to an iframe?

How do I round a double to two decimal places in Java?

Debugging PHP Mail() and/or PHPMailer

How to identify object types in java

SQL - using alias in Group By

PHP check whether property exists in object or class

property_exists( mixed $class , string $property )

isset( mixed $var [, mixed $... ] )

The executable gets signed with invalid entitlements in Xcode

How to style the option of an html "select" element?

Textarea to resize based on content length

How to make a div have a fixed size?

How can I get my Android device country code without using GPS?

Sample code used to check the country is India or not.

jQuery Ajax calls and the Html.AntiForgeryToken()

How to use the 'main' parameter in package.json?

"Primary Filegroup is Full" in SQL Server 2008 Standard for no apparent reason

How to get all properties values of a JavaScript Object (without knowing the keys)?

How to include a class in PHP

VSCode cannot find module '@angular/core' or any other modules

Accessing JSON elements

What is tail call optimization?

SQL Server : check if variable is Empty or NULL for WHERE clause

Reading settings from app.config or web.config in .NET

NodeJS - What does "socket hang up" actually mean?

Can I escape html special chars in javascript?

How to round the minute of a datetime object

Correctly ignore all files recursively under a specific folder except for a specific file type

Android : change button text and background color

Does JavaScript have a built in stringbuilder class?

UPDATE

Create a Maven project in Eclipse complains "Could not resolve archetype"

Work with a time span in Javascript

Single Page Application: advantages and disadvantages

Update 19.06.16:

How to show multiline text in a table cell

Can you overload controller methods in ASP.NET MVC?

Differences between ConstraintLayout and RelativeLayout

How to remove the character at a given index from a string in C?

How to add to an existing hash in Ruby

Centering image and text in R Markdown for a PDF report

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