Fatal error: Can't open and lock privilege tables: Table 'mysql.host' doesn't exist

I had the same issue in trying to start the server and followed the "checked" solution. But still had the problem. The issue was the my /etc/my.cnf file was not pointing to my designated datadir as defined when I executed the mysql_install_db with --datadir defined. Once I updated this, the server started correctly.

django admin - add custom form fields that are not part of the model

you can always create new admin template , and do what you need in your admin_view (override the admin add url to your admin_view):

 url(r'^admin/mymodel/mymodel/add/$' , 'admin_views.add_my_special_model')

close vs shutdown socket?

linux: shutdown() causes listener thread select() to awake and produce error. shutdown(); close(); will lead to endless wait.

winsock: vice versa - shutdown() has no effect, while close() is successfully catched.

What Vim command(s) can be used to quote/unquote words?

In addition to the other commands, this will enclose all words in a line in double quotes (as per your comment)

:s/\(\S\+\)/"\1"/

or if you want to reduce the number of backslashes, you can put a \v (very-magic) modifier at the start of the pattern

:s/\v(\S+)/"\1"/

Bootstrap - How to add a logo to navbar class?

Enter the image and give height:100%;width:auto then just change the height of navbar itself to resize image. There is a really good example in codepen. https://codepen.io/bootstrapped/pen/KwYGwq

JPA - Returning an auto generated id after persist()

The ID is only guaranteed to be generated at flush time. Persisting an entity only makes it "attached" to the persistence context. So, either flush the entity manager explicitely:

em.persist(abc);
em.flush();
return abc.getId();

or return the entity itself rather than its ID. When the transaction ends, the flush will happen, and users of the entity outside of the transaction will thus see the generated ID in the entity.

@Override
public ABC addNewABC(ABC abc) {
    abcDao.insertABC(abc);
    return abc;
}

Is div inside list allowed?

Yes it is valid according to xhtml1-strict.dtd. The following XHTML passes the validation:

<?xml version="1.0"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>Test</title>
</head>
<body>
<ul>
  <li><div>test</div></li>
</ul>
</body>
</html>

Using $_POST to get select option value from HTML

Use this way:

$selectOption = $_POST['taskOption'];

But it is always better to give values to your <option> tags.

<select name="taskOption">
  <option value="1">First</option>
  <option value="2">Second</option>
  <option value="3">Third</option>
</select>

Conditionally formatting cells if their value equals any value of another column

I unable to comment on the top answer, but Excel actually lets you do this without adding the ugly conditional logic.

Conditional formatting is automatically applied to any input that isn't an error, so you can achieve the same effect as:

=NOT(ISERROR(MATCH(A1,$B$1:$B$1000,0)))

With this:

= MATCH(A1,$B$1:$B$1000,0)))

If the above is applied to your data, A1 will be formatted if it matches any cell in $B$1:$B$1000, as any non-match will return an error.

Can I export a variable to the environment from a bash script without sourcing it?

In order to export out the VAR variable first the most logical and seems working way is to source the variable:

. ./export.bash

source ./export.bash

Now when echoing from main shell it works

 echo $VAR
HELLO, VARABLE

We will now reset VAR

export VAR=""
echo $VAR

Now we will execute a script to source the variable then unset it :

./test-export.sh 
HELLO, VARABLE
--
.

the code: cat test-export.sh

    #!/bin/bash
    # Source env variable
    source ./export.bash

    # echo out the variable in test script
    echo $VAR

    # unset the variable 
    unset VAR
    # echo a few dotted lines
    echo "---"
    # now return VAR which is blank
    echo $VAR

Here is one way

PLEASE NOTE: The exports are limited to the script that execute the exports in your main console - so as far as a cron job I would add it like the console like below... for the command part still questionable: here is how you would run in from your shell:

On your command prompt (so long as the export.bash has multiple echo values)

IFS=$'\n'; for entries in $(./export.bash); do  export $entries;  done; ./v1.sh 
HELLO THERE
HI THERE

cat v1.sh

#!/bin/bash
echo $VAR
echo $VAR1

Now so long as this is for your usage - you could make the variables available for your scripts at any time by doing a bash alias like this:

myvars ./v1.sh
HELLO THERE
HI THERE

echo $VAR

.

add this to your .bashrc

function myvars() { 
    IFS=$'\n'; 
    for entries in $(./export.bash); do  export $entries;  done; 

    "$@"; 

    for entries in $(./export.bash); do variable=$(echo $entries|awk -F"=" '{print $1}'); unset $variable;
done

}

source your bashrc file and you can do like above any time ...

Anyhow back to the rest of it..

This has made it available globally then executed the script..

simply echo it out then run export on the echo !

cat export.bash

#!/bin/bash
echo "VAR=HELLO THERE"

Now within script or your console run:

 export "$(./export.bash)"

Try:

echo $VAR
HELLO THERE

Multiple values so long as you know what you are expecting in another script using above method:

cat export.bash

#!/bin/bash
echo "VAR=HELLO THERE"
echo "VAR1=HI THERE"

cat test-export.sh

#!/bin/bash

IFS=$'\n'
for entries in $(./export.bash); do
   export $entries
done

echo "round 1"
echo $VAR
echo $VAR1

for entries in $(./export.bash); do
     variable=$(echo $entries|awk -F"=" '{print $1}');
     unset $variable
done

echo "round 2"
echo $VAR
echo $VAR1

Now the results

 ./test-export.sh 
round 1
HELLO THERE
HI THERE
round 2


.

and the final final update to auto assign read the VARIABLES:

./test-export.sh 
Round 0 - Export out then find variable name - 
Set current variable to the variable exported then echo its value
$VAR has value of HELLO THERE
$VAR1 has value of HI THERE
round 1 - we know what was exported and we will echo out known variables
HELLO THERE
HI THERE
Round 2 - We will just return the variable names and unset them 
round 3 - Now we get nothing back

The script: cat test-export.sh

#!/bin/bash

IFS=$'\n'
echo "Round 0 - Export out then find variable name - "
echo "Set current variable to the variable exported then echo its value"
for entries in $(./export.bash); do
 variable=$(echo $entries|awk -F"=" '{print $1}');
 export $entries
 eval current_variable=\$$variable
 echo "\$$variable has value of $current_variable"
done


echo "round 1 - we know what was exported and we will echo out known variables"
echo $VAR
echo $VAR1

echo "Round 2 - We will just return the variable names and unset them "
for entries in $(./export.bash); do
 variable=$(echo $entries|awk -F"=" '{print $1}');
 unset $variable
done

echo "round 3 - Now we get nothing back"
echo $VAR
echo $VAR1

SOAP-UI - How to pass xml inside parameter

Either encode the needed XML entities or use CDATA.

<arg0>
    <!--Optional:-->
    <parameter1>&lt;test>like this&lt;/test></parameter1>
    <!--Optional:-->
    <parameter2><![CDATA[<test>or like this</test>]]></parameter2>
 </arg0>

Python JSON dump / append to .txt with each variable on new line

Your question is a little unclear. If you're generating hostDict in a loop:

with open('data.txt', 'a') as outfile:
    for hostDict in ....:
        json.dump(hostDict, outfile)
        outfile.write('\n')

If you mean you want each variable within hostDict to be on a new line:

with open('data.txt', 'a') as outfile:
    json.dump(hostDict, outfile, indent=2)

When the indent keyword argument is set it automatically adds newlines.

best OCR (Optical character recognition) example in android

Like you I also faced many problems implementing OCR in Android, but after much Googling I found the solution, and it surely is the best example of OCR.

Let me explain using step-by-step guidance.

First, download the source code from https://github.com/rmtheis/tess-two.

Import all three projects. After importing you will get an error. To solve the error you have to create a res folder in the tess-two project

enter image description here

First, just create res folder in tess-two by tess-two->RightClick->new Folder->Name it "res"

After doing this in all three project the error should be gone.

Now download the source code from https://github.com/rmtheis/android-ocr, here you will get best example.

Now you just need to import it into your workspace, but first you have to download android-ndk from this site:

http://developer.android.com/tools/sdk/ndk/index.html i have windows 7 - 32 bit PC so I have download http://dl.google.com/android/ndk/android-ndk-r9-windows-x86.zip this file

Now extract it suppose I have extract it into E:\Software\android-ndk-r9 so I will set this path on Environment Variable

Right Click on MyComputer->Property->Advance-System-Settings->Advance->Environment Variable-> find PATH on second below Box and set like path like below picture

enter image description here

done it

Now open cmd and go to on D:\Android Workspace\tess-two like below

enter image description here

If you have successfully set up environment variable of NDK then just type ndk-build just like above picture than enter you will not get any kind of error and all file will be compiled successfully:

Now download other source code also from https://github.com/rmtheis/tess-two , and extract and import it and give it name OCRTest, like in my PC which is in D:\Android Workspace\OCRTest

enter image description here

Import test-two in this and run OCRTest and run it; you will get the best example of OCR.

UL has margin on the left

The <ul> element has browser inherent padding & margin by default. In your case, Use

#footer ul {
    margin: 0; /* To remove default bottom margin */ 
    padding: 0; /* To remove default left padding */
}

or a CSS browser reset ( https://cssreset.com/ ) to deal with this.

Object variable or With block variable not set (Error 91)

As I wrote in my comment, the solution to your problem is to write the following:

Set hyperLinkText = hprlink.Range

Set is needed because TextRange is a class, so hyperLinkText is an object; as such, if you want to assign it, you need to make it point to the actual object that you need.

Laravel 5 Eloquent where and or in Clauses

When we use multiple and (where) condition with last (where + or where) the where condition fails most of the time. for that we can use the nested where function with parameters passing in that.

$feedsql = DB::table('feeds as t1')
                   ->leftjoin('groups as t2', 't1.groups_id', '=', 't2.id')
                    ->where('t2.status', 1)
                    ->whereRaw("t1.published_on <= NOW()") 
                    >whereIn('t1.groupid', $group_ids)
                   ->where(function($q)use ($userid) {
                            $q->where('t2.contact_users_id', $userid)
                            ->orWhere('t1.users_id', $userid);
                     })
                  ->orderBy('t1.published_on', 'desc')->get();

The above query validate all where condition then finally checks where t2.status=1 and (where t2.contact_users_id='$userid' or where t1.users_id='$userid')

What is the difference between localStorage, sessionStorage, session and cookies?

LocalStorage:

Web storage can be viewed simplistically as an improvement on cookies, providing much greater storage capacity. Available size is 5MB which considerably more space to work with than a typical 4KB cookie.
The data is not sent back to the server for every HTTP request (HTML, images, JavaScript, CSS, etc) - reducing the amount of traffic between client and server.
The data stored in localStorage persists until explicitly deleted. Changes made are saved and available for all current and future visits to the site.
It works on same-origin policy. So, data stored will only be available on the same origin.

Cookies:

We can set the expiration time for each cookie
The 4K limit is for the entire cookie, including name, value, expiry date etc. To support most browsers, keep the name under 4000 bytes, and the overall cookie size under 4093 bytes.
The data is sent back to the server for every HTTP request (HTML, images, JavaScript, CSS, etc) - increasing the amount of traffic between client and server.

sessionStorage:

It is similar to localStorage.
Changes are only available per window (or tab in browsers like Chrome and Firefox). Changes made are saved and available for the current page, as well as future visits to the site on the same window. Once the window is closed, the storage is deleted The data is available only inside the window/tab in which it was set.
The data is not persistent i.e. it will be lost once the window/tab is closed. Like localStorage, it works on same-origin policy. So, data stored will only be available on the same origin.

Convert JSON format to CSV format for MS Excel

I'm not sure what you're doing, but this will go from JSON to CSV using JavaScript. This is using the open source JSON library, so just download JSON.js into the same folder you saved the code below into, and it will parse the static JSON value in json3 into CSV and prompt you to download/open in Excel.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>JSON to CSV</title>
    <script src="scripts/json.js" type="text/javascript"></script>
    <script type="text/javascript">
    var json3 = { "d": "[{\"Id\":1,\"UserName\":\"Sam Smith\"},{\"Id\":2,\"UserName\":\"Fred Frankly\"},{\"Id\":1,\"UserName\":\"Zachary Zupers\"}]" }

    DownloadJSON2CSV(json3.d);

    function DownloadJSON2CSV(objArray)
    {
        var array = typeof objArray != 'object' ? JSON.parse(objArray) : objArray;

        var str = '';

        for (var i = 0; i < array.length; i++) {
            var line = '';

            for (var index in array[i]) {
                line += array[i][index] + ',';
            }

            // Here is an example where you would wrap the values in double quotes
            // for (var index in array[i]) {
            //    line += '"' + array[i][index] + '",';
            // }

            line.slice(0,line.Length-1); 

            str += line + '\r\n';
        }
        window.open( "data:text/csv;charset=utf-8," + escape(str))
    }

    </script>

</head>
<body>
    <h1>This page does nothing....</h1>
</body>
</html>

Show diff between commits

I always love using the command line and have user friendly tools (with GUI) at my hand. Best of both worlds. Here is how I do it to compare two commits in Git.

You can show the diff between two commits like the following.

Edit your git config file in a TEXT EDITOR:

git config --global -e

Set up a proper diff tool (user friendly) like Meld like this in Windows in the Git config file:

[difftool "meld"]
cmd = "C:/Program Files (x86)/Meld/Meld.exe" "LOCAL\" \"REMOTE" --label "DIFF (ORIGINAL MY)"
prompt = false
path = C:\Program Files (x86)\Meld\Meld.exe

Meld can be installed using Chocolatey like this from the COMMAND LINE:

choco install meld

Let's define a shell function to help us compare two sha-s (commits) under [alias] in the TEXT EDITOR:

[alias]
showchangesbetween = "!w() { git difftool \"$1\" \"$2\" --dir-diff --ignore-all-space; }; w"

To compare the commits with the help of Meld (or your other favorite diff tool, just type at the COMMAND LINE:

git showchangesbetween somesha123 somesha456

The commit sha-s are easily visible typing

 git log

for example.

How to update fields in a model without creating a new record in django?

If you get a model instance from the database, then calling the save method will always update that instance. For example:

t = TemperatureData.objects.get(id=1)
t.value = 999  # change field
t.save() # this will update only

If your goal is prevent any INSERTs, then you can override the save method, test if the primary key exists and raise an exception. See the following for more detail:

How Django knows to UPDATE vs. INSERT

Conditional formatting based on another cell's value

Basically all you need to do is add $ as prefix at column letter and row number. Please see image below

How to create a file in Ruby

File.new and File.open default to read mode ('r') as a safety mechanism, to avoid possibly overwriting a file. We have to explicitly tell Ruby to use write mode ('w' is the most common way) if we're going to output to the file.

If the text to be output is a string, rather than write:

File.open('foo.txt', 'w') { |fo| fo.puts "bar" }

or worse:

fo = File.open('foo.txt', 'w')
fo.puts "bar"
fo.close

Use the more succinct write:

File.write('foo.txt', 'bar')

write has modes allowed so we can use 'w', 'a', 'r+' if necessary.

open with a block is useful if you have to compute the output in an iterative loop and want to leave the file open as you do so. write is useful if you are going to output the content in one blast then close the file.

See the documentation for more information.

Can I have multiple :before pseudo-elements for the same element?

If your main element has some child elements or text, you could make use of it.

Position your main element relative (or absolute/fixed) and use both :before and :after positioned absolute (in my situation it had to be absolute, don't know about your's).

Now if you want one more pseudo-element, attach an absolute :before to one of the main element's children (if you have only text, put it in a span, now you have an element), which is not relative/absolute/fixed.

This element will start acting like his owner is your main element.

HTML

<div class="circle">
    <span>Some text</span>
</div>

CSS

.circle {
    position: relative; /* or absolute/fixed */
}

.circle:before {
    position: absolute;
    content: "";
    /* more styles: width, height, etc */
}

.circle:after {
    position: absolute;
    content: "";
    /* more styles: width, height, etc */
}

.circle span {
    /* not relative/absolute/fixed */
}

.circle span:before {
    position: absolute;
    content: "";
    /* more styles: width, height, etc */
}

Iterating through populated rows

I'm going to make a couple of assumptions in my answer. I'm assuming your data starts in A1 and there are no empty cells in the first column of each row that has data.

This code will:

Find the last row in column A that has data
Loop through each row
Find the last column in current row with data
Loop through each cell in current row up to last column found.

This is not a fast method but will iterate through each one individually as you suggested is your intention.

Sub iterateThroughAll()
    ScreenUpdating = False
    Dim wks As Worksheet
    Set wks = ActiveSheet

    Dim rowRange As Range
    Dim colRange As Range

    Dim LastCol As Long
    Dim LastRow As Long
    LastRow = wks.Cells(wks.Rows.Count, "A").End(xlUp).Row

    Set rowRange = wks.Range("A1:A" & LastRow)

    'Loop through each row
    For Each rrow In rowRange
        'Find Last column in current row
        LastCol = wks.Cells(rrow, wks.Columns.Count).End(xlToLeft).Column
        Set colRange = wks.Range(wks.Cells(rrow, 1), wks.Cells(rrow, LastCol))

        'Loop through all cells in row up to last col
        For Each cell In colRange
            'Do something to each cell
            Debug.Print (cell.Value)
        Next cell
    Next rrow
    ScreenUpdating = True
End Sub

Specify multiple attribute selectors in CSS

For concatenating it's:

input[name="Sex"][value="M"] {}

And for taking union it's:

input[name="Sex"], input[value="M"] {}

$_POST not working. "Notice: Undefined index: username..."

You should check if the POST['username'] is defined. Use this above:

$username = "";

if(isset($_POST['username'])){
    $username = $_POST['username'];
}

"SELECT password FROM users WHERE username='".$username."'"

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

I was not getting the MongoDB error message in the thrown error in my NodeJS API response, so I did the following

// It was not working
console.log(error.message) // prints the error
let response = error;
// message property was not available in the response.
/* 
{
  "status": "error",
  "error": {
    "driver": true,
    "name": "MongoError",
    "index": 0,
    "code": 11000,
    "keyPattern": {
      "event_name": 1
    },
    "keyValue": {
      "event_name": "followup"
    }
  }
}
*/

// so I did this
let message = error.message;
let response = JSON.parse(JSON.stringify(error));
response.message = message;
// message property is now available in the response.
/* 
{
  "status": "error",
  "error": {
    "driver": true,
    "name": "MongoError",
    "index": 0,
    "code": 11000,
    "keyPattern": {
      "event_name": 1
    },
    "keyValue": {
      "event_name": "followup"
    },
    "message": "E11000 duplicate key error collection: mycollections.notificationevents index: event_name_1 dup key: { event_name: \"followup\" }"
  }
}
*/

How to obtain image size using standard Python class (without using external library)?

Stumbled upon this one but you can get it by using the following as long as you import numpy.

import numpy as np

[y, x] = np.shape(img[:,:,0])

It works because you ignore all but one color and then the image is just 2D so shape tells you how bid it is. Still kinda new to Python but seems like a simple way to do it.

SQL comment header examples

We use something like this and very useful for me .

/*  
Description:   
Author:   
Create Date: 
Param:   
Return:   
Modified Date:  
Modification:   
*/

How to fill in proxy information in cntlm config file?

Here is a guide on how to use cntlm

What is cntlm?

cntlm is an NTLM/NTLMv2 authenticating HTTP proxy

It takes the address of your proxy and opens a listening socket, forwarding each request to the parent proxy

Why cntlm?

Using cntlm we make it possible to run tools like choro, pip3, apt-get from a command line

pip3 install requests
choco install git

The main advantage of cntlm is password protection.

With cntlm you can use password hashes.

So NO PLAINTEXT PASSWORD in %HTTP_PROXY% and %HTTPS_PROXY% environment variables

Install cntlm

You can get the latest cntlm release from sourceforge

Note! Username and domain

My username is zezulinsky

My domain is local

When I run commands I use zezulinsky@local

Place your username when you run commands

Generate password hash

Run a command

cntlm -u zezulinsky@local -H

Enter your password:

Password:

As a result you are getting hashed password:

PassLM          AB7D42F42QQQQ407552C4BCA4AEBFB11
PassNT          PE78D847E35FA7FA59710D1231AAAF99
PassNTLMv2      46738B2E607F9093296AA4C319C3A259

Verify your generated hash is valid

Run a command

cntlm -u zezulinsky@local -M http://google.com

Enter your password

Password:

The result output

Config profile  1/4... OK (HTTP code: 301)
----------------------------[ Profile  0 ]------
Auth            NTLMv2
PassNTLMv2      46738B2E607F9093296AA4C319C3A259
------------------------------------------------

Note! check that PassNTLMv2 hash is the same The resulting hash is the same for both commands

PassNTLMv2      46738B2E607F9093296AA4C319C3A259

Change configuration file

Place generated hashes into the cntlm.ini configuration file

C:\Program Files (x86)\Cntlm\cntlm.ini

Here is how your cntlm.ini should look like

Username    zezulinsky
Domain      local
PassLM      AB7D42F42QQQQ407552C4BCA4AEBFB11
PassNT      PE78D847E35FA7FA59710D1231AAAF99
PassNTLMv2  46738B2E607F9093296AA4C319C3A259

Proxy       PROXYSERVER:8080
NoProxy     localhost, 127.0.0.*
Listen      3128

Note! newline at the end of cntlm.ini

It is important to add a newline at the end of the cntlm.ini configuration file

Set your environment variables

HTTPS_PROXY=http://localhost:3128
HTTP_PROXY=http://localhost:3128

Check that your cntlm works

Stop all the processes named cntlm.exe with process explorer

Run the command

cntlm -u zezulinsky@local -H

The output looks like

cygwin warning:
  MS-DOS style path detected: C:\Program Files (x86)\Cntlm\cntlm.ini
  Preferred POSIX equivalent is: /Cntlm/cntlm.ini
  CYGWIN environment variable option "nodosfilewarning" turns off this warning.
  Consult the user's guide for more details about POSIX paths:
    http://cygwin.com/cygwin-ug-net/using.html#using-pathnames
section: local, Username = 'zezulinsky'
section: local, Domain = 'local'
section: local, PassLM = 'AB7D42F42QQQQ407552C4BCA4AEBFB11'
section: local, PassNT = 'PE78D847E35FA7FA59710D1231AAAF99'
section: local, PassNTLMv2 = '46738B2E607F9093296AA4C319C3A259'
section: local, Proxy = 'PROXYSERVER:8080'
section: local, NoProxy = 'localhost, 10.*, 127.0.0.*
section: local, Listen = '3128'
Default config file opened successfully
cntlm: Proxy listening on 127.0.0.1:3128
Adding no-proxy for: 'localhost'
Adding no-proxy for: '10.*'
Adding no-proxy for: '127.0.0.*'
cntlm: Workstation name used: MYWORKSTATION
cntlm: Using following NTLM hashes: NTLMv2(1) NT(0) LM(0)
cntlm: PID 1234: Cntlm ready, staying in the foreground

Open a new cmd and run a command:

pip3 install requests

You should have requests python package installed

Restart your machine

Congrats, now you have cntlm installed and configured

Delete a row in Excel VBA

Better yet, use union to grab all the rows you want to delete, then delete them all at once. The rows need not be continuous.

dim rng as range
dim rDel as range

for each rng in {the range you're searching}
   if {Conditions to be met} = true then
      if not rDel is nothing then
         set rDel = union(rng,rDel)
      else
         set rDel = rng
      end if
   end if
 next
 
 rDel.entirerow.delete

That way you don't have to worry about sorting or things being at the bottom.

Why does the C++ STL not provide any "tree" containers?

the std::map is based on a red black tree. You can also use other containers to help you implement your own types of trees.

android activity has leaked window com.android.internal.policy.impl.phonewindow$decorview Issue

The way I got around this issue is by not calling intent within a dialog. **** use syntax applicable to activity or fragment accordingly

@Override
public void onClick(DialogInterface dialog, int which) {
    checkvariable= true;
    getActivity().finish();
}

@Override
public void onStop() {
    super.onStop();
    if (checkvariable) {
        startActivity(intent); 
    }
}

What is the difference between document.location.href and document.location?

As of June 14th 2013 (HTML5), there is a significant difference

Browser : Chrome 27.X.X

References: document.location, window.location (MDN)

document.location

type: Object

The object when called by itself document.location return its origin + pathname properties concatenated.

To retrieve just the URL as a string, the read-only document.URL property can be used.

ancestorOrigins: DOMStringList
assign: function () { [native code] }
hash: ""
host: "stackoverflow.com"
hostname: "stackoverflow.com"
href: "http://stackoverflow.com/questions/2652816/what-is-the-difference-between-document-location-href-and-document-location?rq=1"
origin: "http://stackoverflow.com"
pathname: "/questions/2652816/what-is-the-difference-between-document-location-href-and-document-location"
port: ""
protocol: "http:"
reload: function () { [native code] }
replace: function () { [native code] }
search: "?rq=1"
toString: function toString() { [native code] }
valueOf: function valueOf() { [native code] }

document.location.href

type: string

http://stackoverflow.com/questions/2652816/what-is-the-difference-between-document-location-href-and-document-location?rq=1

python: create list of tuples from lists

Use the builtin function zip():

In Python 3:

z = list(zip(x,y))

In Python 2:

z = zip(x,y)

Easiest way to compare arrays in C#

This LINQ solution works, not sure how it compares in performance to SequenceEquals. But it handles different array lengths and the .All will exit on the first item that is not equal without iterating through the whole array.

private static bool arraysEqual<T>(IList<T> arr1, IList<T> arr2)
        =>
            ReferenceEquals(arr1, arr2) || (
                arr1 != null && arr2 != null &&
                arr1.Count == arr2.Count &&
                arr1.Select((a, i) => arr2[i].Equals(a)).All(i => i)
            );

How do you do the "therefore" (?) symbol on a Mac or in Textmate?

First you use a full stop, then you hold down alt and press the letter H and put in another full stop. .?.

.htaccess mod_rewrite - how to exclude directory from rewrite rule

RewriteEngine On

RewriteRule ^(wordpress)($|/) - [L]

Get The Current Domain Name With Javascript (Not the path, etc.)

       Feel free to visit our “<a href="javascript:document.location.href=document.location.origin+'/contact-us'" title="Click to Contact Us" class="coded_link" ><span class="ui-icon ui-icon-newwin"></span>Contact</a>” link

Indeed worked for me whereas I couldn't use PHP

Just tested that it worked thanks to the approach mentioned above in some of the answers, so quick and verified that worked

What causes the Broken Pipe Error?

We had the Broken Pipe error after a new network was put into place. After ensuring that port 9100 was open and could connect to the printer over telnet port 9100, we changed the printer driver from "HP" to "Generic PDF", the broken pipe error went away and were able to print successfully.

(RHEL 7, Printers were Ricoh brand, the HP configuration was pre-existing and functional on the previous network)

SQL Server : SUM() of multiple rows including where clauses

you mean getiing sum(Amount of all types) for each property where EndDate is null:

SELECT propertyId, SUM(Amount) as TOTAL_COSTS
  FROM MyTable
 WHERE EndDate IS NULL
GROUP BY propertyId

How to extract request http headers from a request using NodeJS connect

If you use Express 4.x, you can use the req.get(headerName) method as described in Express 4.x API Reference

Insert HTML from CSS

No. The only you can do is to add content (and not an element) using :before or :after pseudo-element.

More information: http://www.w3.org/TR/CSS2/generate.html#before-after-content

Get the size of a 2D array

Expanding on what Mark Elliot said earlier, the easiest way to get the size of a 2D array given that each array in the array of arrays is of the same size is:

array.length * array[0].length

New line in Sql Query

use CHAR(10) for New Line in SQL
char(9) for Tab
and Char(13) for Carriage Return

C++: Converting Hexadecimal to Decimal

This should work as well.

#include <ctype.h>
#include <string.h>

template<typename T = unsigned int>
T Hex2Int(const char* const Hexstr, bool* Overflow)
{
    if (!Hexstr)
        return false;
    if (Overflow)
        *Overflow = false;

    auto between = [](char val, char c1, char c2) { return val >= c1 && val <= c2; };
    size_t len = strlen(Hexstr);
    T result = 0;

    for (size_t i = 0, offset = sizeof(T) << 3; i < len && (int)offset > 0; i++)
    {
        if (between(Hexstr[i], '0', '9'))
            result = result << 4 ^ Hexstr[i] - '0';
        else if (between(tolower(Hexstr[i]), 'a', 'f'))
            result = result << 4 ^ tolower(Hexstr[i]) - ('a' - 10); // Remove the decimal part;
        offset -= 4;
    }
    if (((len + ((len % 2) != 0)) << 2) > (sizeof(T) << 3) && Overflow)
        *Overflow = true;
    return result;
}

The 'Overflow' parameter is optional, so you can leave it NULL.

Example:

auto result = Hex2Int("C0ffee", NULL);
auto result2 = Hex2Int<long>("DeadC0ffe", NULL);

Swift Set to Array

I created a simple extension that gives you an unsorted Array as a property of Set in Swift 4.0.

extension Set {
    var array: [Element] {
        return Array(self)
    }
}

If you want a sorted array, you can either add an additional computed property, or modify the existing one to suit your needs.

To use this, just call

let array = set.array

Date and time conversion to some other Timezone in java

Remove ALL white spaces from text

You have to tell replace() to repeat the regex:

.replace(/ /g,'')

The g character makes it a "global" match, meaning it repeats the search through the entire string. Read about this, and other RegEx modifiers available in JavaScript here.

If you want to match all whitespace, and not just the literal space character, use \s instead:

.replace(/\s/g,'')

You can also use .replaceAll if you're using a sufficiently recent version of JavaScript, but there's not really any reason to for your specific use case, since catching all whitespace requires a regex, and when using a regex with .replaceAll, it must be global, so you just end up with extra typing:

.replaceAll(/\s/g,'')

jQuery - prevent default, then continue default

You can use e.preventDefault() which will stop the current operation.

than you can do$("#form").submit();

 $('#form').submit(function (e)
{
    return !!e.submit;
});
if(blabla...)
{...
}
else
{
    $('#form').submit(
    {
        submit: true
    });
}

Requests (Caused by SSLError("Can't connect to HTTPS URL because the SSL module is not available.") Error in PyCharm requesting website

I had the same thing on my Windows 10 installation.

Anaconda3 would not open Anaconda Navigator before I copied libcrypto-1_1-x64.dll and libssl-1_1-x64.dll from Anaconda3\Library\bin to \Anaconda3\DLL.

Once I did that pip install in the base environment worked fine but not in another environment I created. I had to do the same as above in the new environment.

That is, copy libcrypto-1_1-x64.dll and libssl-1_1-x64.dll from \<env folder>\Library\bin to \<env folder>\DLL then it worked fine.

How to leave a message for a github.com user

Simply cereate a dummy repo, open a new issue and use @xxxxx to notify the affected user.

If user has notification via e-mail enabled he will get an e-mail, if not he will notice on next login.

No need to search for e-mail adress in commits or activity stream and privacy is respected.

Handling identity columns in an "Insert Into TABLE Values()" statement?

You have 2 choices:

1) Either specify the column name list (without the identity column).

2) SET IDENTITY_INSERT tablename ON, followed by insert statements that provide explicit values for the identity column, followed by SET IDENTITY_INSERT tablename OFF.

If you are avoiding a column name list, perhaps this 'trick' might help?:

-- Get a comma separated list of a table's column names
SELECT STUFF(
(SELECT 
',' + COLUMN_NAME AS [text()]
FROM 
INFORMATION_SCHEMA.COLUMNS
WHERE 
TABLE_NAME = 'TableName'
Order By Ordinal_position
FOR XML PATH('')
), 1,1, '')

What is an optional value in Swift?

In objective C variables with no value were equal to 'nil'(it was also possible to use 'nil' values same as 0 and false), hence it was possible to use variables in conditional statements (Variables having values are same as 'TRUE' and those with no values were equal to 'FALSE').

Swift provides type safety by providing 'optional value'. i.e. It prevents errors formed from assigning variables of different types.

So in Swift, only booleans can be provided on conditional statements.

var hw = "Hello World"

Here, even-though 'hw' is a string, it can't be used in an if statement like in objective C.

//This is an error

if hw

 {..}

For that it needs to be created as,

var nhw : String? = "Hello World"

//This is correct

if nhw

 {..}

How to convert string to char array in C++?

If you're using C++11 or above, I'd suggest using std::snprintf over std::strcpy or std::strncpy because of its safety (i.e., you determine how many characters can be written to your buffer) and because it null-terminates the string for you (so you don't have to worry about it). It would be like this:

#include <string>
#include <cstdio>

std::string tmp = "cat";
char tab2[1024];
std::snprintf(tab2, sizeof(tab2), "%s", tmp.c_str());

In C++17, you have this alternative:

#include <string>
#include <cstdio>
#include <iterator>

std::string tmp = "cat";
char tab2[1024];
std::snprintf(tab2, std::size(tab2), "%s", tmp.c_str());

mysqldump data only

If you just want the INSERT queries, use the following:

mysqldump --skip-triggers --compact --no-create-info

SQL Server: combining multiple rows into one row

CREATE VIEW  [dbo].[ret_vwSalariedForReport]
AS
     WITH temp1 AS (SELECT
     salaried.*,
     operationalUnits.Title as OperationalUnitTitle
FROM
    ret_vwSalaried salaried LEFT JOIN
    prs_operationalUnitFeatures operationalUnitFeatures on salaried.[Guid] = operationalUnitFeatures.[FeatureGuid] LEFT JOIN 
    prs_operationalUnits operationalUnits ON operationalUnits.id = operationalUnitFeatures.OperationalUnitID 
    ), 
temp2 AS (SELECT
    t2.*,
    STUFF ((SELECT ' - ' + t1.OperationalUnitTitle
        FROM
            temp1 t1 
        WHERE t1.[ID] = t2.[ID]  
        For XML PATH('')), 2, 2, '') OperationalUnitTitles from temp1 t2) 
SELECT 
    [Guid],
    ID,
    Title,
    PersonnelNo,
    FirstName,
    LastName,
    FullName,
    Active,
    SSN,
    DeathDate,
    SalariedType,
    OperationalUnitTitles
FROM 
    temp2
GROUP BY 
    [Guid],
    ID,
    Title,
    PersonnelNo,
    FirstName,
    LastName,
    FullName,
    Active,
    SSN,
    DeathDate,
    SalariedType,
    OperationalUnitTitles

How to set character limit on the_content() and the_excerpt() in wordpress

wp_trim_words() This function trims text to a certain number of words and returns the trimmed text.

$excerpt = wp_trim_words( get_the_content(), 40, '<a href="'.get_the_permalink().'">More Link</a>');

Get truncated string with specified width using mb_strimwidth() php function.

$excerpt = mb_strimwidth( strip_tags(get_the_content()), 0, 100, '...' );

Using add_filter() method of WordPress on the_content filter hook.

add_filter( "the_content", "limit_content_chr" );
function limit_content_chr( $content ){
    if ( 'post' == get_post_type() ) {
        return mb_strimwidth( strip_tags($content), 0, 100, '...' );
    } else {
        return $content;
    }
}

Using custom php function to limit content characters.

function limit_content_chr( $content, $limit=100 ) {
    return mb_strimwidth( strip_tags($content), 0, $limit, '...' );
}

// using above function in template tags
echo limit_content_chr( get_the_content(), 50 );

How to check whether Kafka Server is running?

Paul's answer is very good and it is actually how Kafka & Zk work together from a broker point of view.

I would say that another easy option to check if a Kafka server is running is to create a simple KafkaConsumer pointing to the cluste and try some action, for example, listTopics(). If kafka server is not running, you will get a TimeoutException and then you can use a try-catch sentence.

  def validateKafkaConnection(kafkaParams : mutable.Map[String, Object]) : Unit = {
    val props = new Properties()
    props.put("bootstrap.servers", kafkaParams.get("bootstrap.servers").get.toString)
    props.put("group.id", kafkaParams.get("group.id").get.toString)
    props.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer")
    props.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer")
    val simpleConsumer = new KafkaConsumer[String, String](props)
    simpleConsumer.listTopics()
  }

Proper way to restrict text input values (e.g. only numbers)

After did lot of research finally I create a function which full fill the requirement. The function which I created restrict all special character and allow only alphabets and number.. and that function works fine for both either you did copy paste and typing both. Hope it works :)

 public inputValidator(event: any) {
    //console.log(event.target.value);
    const pattern = /^[a-zA-Z0-9]*$/;   
    //let inputChar = String.fromCharCode(event.charCode)
    if (!pattern.test(event.target.value)) {
      event.target.value = event.target.value.replace(/[^a-zA-Z0-9]/g, "");
      // invalid character, prevent input

    }
  }

     <input type="text" [(ngModel)]="abc.abc" (input)="inputValidator($event)" />

How you use -
1) Add above method in your class component of ts file.
2) Call method inputValidator($event) on input event..

How to extract text from a string using sed?

The pattern \d might not be supported by your sed. Try [0-9] or [[:digit:]] instead.

To only print the actual match (not the entire matching line), use a substitution.

sed -n 's/.*\([0-9][0-9]*G[0-9][0-9]*\).*/\1/p'

Change UITableView height dynamically

create your cell by xib or storyboard. give it's outlet's contents. now call it in CellForRowAtIndexPath. eg. if you want to set cell height according to Comment's label text. enter image description here

so set you commentsLbl.numberOfLine=0; enter image description here

so set you commentsLbl.numberOfLine=0;

then in ViewDidLoad

 self.table.estimatedRowHeight = 44.0 ;
self.table.rowHeight = UITableViewAutomaticDimension;

and now

-(float)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
return UITableViewAutomaticDimension;}

How can I initialize a String array with length 0 in Java?

String[] str = new String[0];?

Setting Elastic search limit to "unlimited"

From the docs, "Note that from + size can not be more than the index.max_result_window index setting which defaults to 10,000". So my admittedly very ad-hoc solution is to just pass size: 10000 or 10,000 minus from if I use the from argument.

Note that following Matt's comment below, the proper way to do this if you have a larger amount of documents is to use the scroll api. I have used this successfully, but only with the python interface.

Adding hours to JavaScript Date object?

The below code is to add 4 hours to date(example today's date)

var today = new Date();
today.setHours(today.getHours() + 4);

It will not cause error if you try to add 4 to 23 (see the docs):

If a parameter you specify is outside of the expected range, setHours() attempts to update the date information in the Date object accordingly

Looping through rows in a DataView

I prefer to do it in a more direct fashion. It does not have the Rows but is still has the array of rows.

tblCrm.DefaultView.RowFilter = "customertype = 'new'";

qtytotal = 0;
for (int i = 0; i < tblCrm.DefaultView.Count; i++)
{
    result = double.TryParse(tblCrm.DefaultView[i]["qty"].ToString(), out num);
    if (result == false) num = 0;
    qtytotal = qtytotal + num;
}

labQty.Text = qtytotal.ToString();

Delete all rows in table

I would suggest using TRUNCATE TABLE, it's quicker and uses less resources than DELETE FROM xxx

Here's the related MSDN article

convert string to number node.js

Using parseInt() is a bad idea mainly because it never fails. Also because some results can be unexpected, like in the case of INFINITY.
Below is the function for handling unexpected behaviour.

function cleanInt(x) {
    x = Number(x);
    return x >= 0 ? Math.floor(x) : Math.ceil(x);
}

See results of below test cases.

console.log("CleanInt: ", cleanInt('xyz'), " ParseInt: ", parseInt('xyz'));
console.log("CleanInt: ", cleanInt('123abc'), " ParseInt: ", parseInt('123abc'));
console.log("CleanInt: ", cleanInt('234'), " ParseInt: ", parseInt('234'));
console.log("CleanInt: ", cleanInt('-679'), " ParseInt: ", parseInt('-679'));
console.log("CleanInt: ", cleanInt('897.0998'), " ParseInt: ", parseInt('897.0998'));
console.log("CleanInt: ", cleanInt('Infinity'), " ParseInt: ", parseInt('Infinity'));

result:

CleanInt:  NaN  ParseInt:  NaN
CleanInt:  NaN  ParseInt:  123
CleanInt:  234  ParseInt:  234
CleanInt:  -679  ParseInt:  -679
CleanInt:  897  ParseInt:  897
CleanInt:  Infinity  ParseInt:  NaN

How to test if list element exists?

One solution that hasn't come up yet is using length, which successfully handles NULL. As far as I can tell, all values except NULL have a length greater than 0.

x <- list(4, -1, NULL, NA, Inf, -Inf, NaN, T, x = 0, y = "", z = c(1,2,3))
lapply(x, function(el) print(length(el)))
[1] 1
[1] 1
[1] 0
[1] 1
[1] 1
[1] 1
[1] 1
[1] 1
[1] 1
[1] 1
[1] 3

Thus we could make a simple function that works with both named and numbered indices:

element.exists <- function(var, element)
{
  tryCatch({
    if(length(var[[element]]) > -1)
      return(T)
  }, error = function(e) {
    return(F)
  })
}

If the element doesn't exist, it causes an out-of-bounds condition caught by the tryCatch block.

Saving any file to in the database, just convert it to a byte array?

I'll describe the way I've stored files, in SQL Server and Oracle. It largely depends on how you are getting the file, in the first place, as to how you will get its contents, and it depends on which database you are using for the content in which you will store it for how you will store it. These are 2 separate database examples with 2 separate methods of getting the file that I used.

SQL Server

Short answer: I used a base64 byte string I converted to a byte[] and store in a varbinary(max) field.

Long answer:

Say you're uploading via a website, so you're using an <input id="myFileControl" type="file" /> control, or React DropZone. To get the file, you're doing something like var myFile = document.getElementById("myFileControl")[0]; or myFile = this.state.files[0];.

From there, I'd get the base64 string using code here: Convert input=file to byte array (use function UploadFile2).

Then I'd get that string, the file name (myFile.name) and type (myFile.type) into a JSON object:

var myJSONObj = {
    file: base64string,
    name: myFile.name,
    type: myFile.type,
}

and post the file to an MVC server backend using XMLHttpRequest, specifying a Content-Type of application/json: xhr.send(JSON.stringify(myJSONObj);. You have to build a ViewModel to bind it with:

public class MyModel
{
    public string file { get; set; }
    public string title { get; set; }
    public string type { get; set; }
}

and specify [FromBody]MyModel myModelObj as the passed in parameter:

[System.Web.Http.HttpPost]  // required to spell it out like this if using ApiController, or it will default to System.Mvc.Http.HttpPost
public virtual ActionResult Post([FromBody]MyModel myModelObj)

Then you can add this into that function and save it using Entity Framework:

MY_ATTACHMENT_TABLE_MODEL tblAtchm = new MY_ATTACHMENT_TABLE_MODEL();
tblAtchm.Name = myModelObj.name;
tblAtchm.Type = myModelObj.type;
tblAtchm.File = System.Convert.FromBase64String(myModelObj.file);
EntityFrameworkContextName ef = new EntityFrameworkContextName();
ef.MY_ATTACHMENT_TABLE_MODEL.Add(tblAtchm);
ef.SaveChanges();

tblAtchm.File = System.Convert.FromBase64String(myModelObj.file); being the operative line.

You would need a model to represent the database table:

public class MY_ATTACHMENT_TABLE_MODEL 
{
    [Key]
    public byte[] File { get; set; }  // notice this change
    public string Name { get; set; }
    public string Type { get; set; }
}

This will save the data into a varbinary(max) field as a byte[]. Name and Type were nvarchar(250) and nvarchar(10), respectively. You could include size by adding it to your table as an int column & MY_ATTACHMENT_TABLE_MODEL as public int Size { get; set;}, and add in the line tblAtchm.Size = System.Convert.FromBase64String(myModelObj.file).Length; above.

Oracle

Short answer: Convert it to a byte[], assign it to an OracleParameter, add it to your OracleCommand, and update your table's BLOB field using a reference to the parameter's ParameterName value: :BlobParameter

Long answer: When I did this for Oracle, I was using an OpenFileDialog and I retrieved and sent the bytes/file information this way:

byte[] array;
OracleParameter param = new OracleParameter();
Microsoft.Win32.OpenFileDialog dlg = new Microsoft.Win32.OpenFileDialog();
dlg.Filter = "Image Files (*.jpg, *.jpeg, *.jpe)|*.jpg;*.jpeg;*.jpe|Document Files (*.doc, *.docx, *.pdf)|*.doc;*.docx;*.pdf"
if (dlg.ShowDialog().Value == true)
{
    string fileName = dlg.FileName;
    using (FileStream fs = File.OpenRead(fileName)
    {
        array = new byte[fs.Length];
        using (BinaryReader binReader = new BinaryReader(fs))
        {
            array = binReader.ReadBytes((int)fs.Length);
        }

        // Create an OracleParameter to transmit the Blob
        param.OracleDbType = OracleDbType.Blob;
        param.ParameterName = "BlobParameter";
        param.Value = array;  // <-- file bytes are here
    }
    fileName = fileName.Split('\\')[fileName.Split('\\').Length-1]; // gets last segment of the whole path to just get the name

    string fileType = fileName.Split('.')[1];
    if (fileType == "doc" || fileType == "docx" || fileType == "pdf")
        fileType = "application\\" + fileType;
    else
        fileType = "image\\" + fileType;

    // SQL string containing reference to BlobParameter named above
    string sql = String.Format("INSERT INTO YOUR_TABLE (FILE_NAME, FILE_TYPE, FILE_SIZE, FILE_CONTENTS, LAST_MODIFIED) VALUES ('{0}','{1}',{2},:BlobParamerter, SYSDATE)", fileName, fileType, array.Length);

    // Do Oracle Update
    RunCommand(sql, param);
}

And inside the Oracle update, done with ADO:

public void RunCommand(string sql, OracleParameter param)
{
    OracleConnection oraConn = null;
    OracleCommand oraCmd = null;
    try
    {
        string connString = GetConnString();
        oraConn = OracleConnection(connString);
        using (oraConn)
        {
            if (OraConnection.State == ConnectionState.Open)
                OraConnection.Close();

            OraConnection.Open();

            oraCmd = new OracleCommand(strSQL, oraConnection);

            // Add your OracleParameter
            if (param != null)
                OraCommand.Parameters.Add(param);

            // Execute the command
            OraCommand.ExecuteNonQuery();
        }
    }
    catch (OracleException err)
    {
       // handle exception 
    }
    finally
    {
       OraConnction.Close();
    }
}

private string GetConnString()
{
    string host = System.Configuration.ConfigurationManager.AppSettings["host"].ToString();
    string port = System.Configuration.ConfigurationManager.AppSettings["port"].ToString();
    string serviceName = System.Configuration.ConfigurationManager.AppSettings["svcName"].ToString();
    string schemaName = System.Configuration.ConfigurationManager.AppSettings["schemaName"].ToString();
    string pword = System.Configuration.ConfigurationManager.AppSettings["pword"].ToString(); // hopefully encrypted

    if (String.IsNullOrEmpty(host) || String.IsNullOrEmpty(port) || String.IsNullOrEmpty(serviceName) || String.IsNullOrEmpty(schemaName) || String.IsNullOrEmpty(pword))
    {
        return "Missing Param";
    }
    else
    {
        pword = decodePassword(pword);  // decrypt here
        return String.Format(
           "Data Source=(DESCRIPTION =(ADDRESS = ( PROTOCOL = TCP)(HOST = {2})(PORT = {3}))(CONNECT_DATA =(SID = {4})));User Id={0};Password={1};",
           user,
           pword,
           host,
           port,
           serviceName
           );
    }
}

And the datatype for the FILE_CONTENTS column was BLOB, the FILE_SIZE was NUMBER(10,0), LAST_MODIFIED was DATE, and the rest were NVARCHAR2(250).

Video file formats supported in iPhone

The short answer is the iPhone supports H.264 video, High profile and AAC audio, in container formats .mov, .mp4, or MPEG Segment .ts. MPEG Segment files are used for HTTP Live Streaming.

For maximum compatibility with Android and desktop browsers, use H.264 + AAC in an .mp4 container.
For extended length videos longer than 10 minutes you must use HTTP Live Streaming, which is H.264 + AAC in a series of small .ts container files (see App Store Review Guidelines rule 2.5.7).

Video

On the iPhone, H.264 is the only game in town. [1]

There are several different feature tiers or "profiles" available in H.264. All modern iPhones (3GS and above) support the High profile. These profiles are basically three different levels of algorithm "tricks" used to compress the video. More tricks give better compression, but require more CPU or dedicated hardware to decode. This is a table that lists the differences between the different profiles.

[1] Interestingly, Apple's own Facetime uses the newer H.265 (HEVC) video codec. However right now (August 2017) there is no Apple-provided library that gives access to a HEVC codec to developers. This is expected to change at some point.

In talking about what video format the iPhone supports, a distinction should be made between what the hardware can support, and what the (much lower) limits are for playback when streaming over a network.

The only data given about hardware video support by Apple about the current generation of iPhones (SE, 6S, 6S Plus, 7, 7 Plus) is that they support

4K [3840x2160] video recording at 30 fps

1080p [1920x1080] HD video recording at 30 fps or 60 fps.

Obviously the phone can play back what it can record, so we can guess that 3840x2160 at 30 fps and 1920x1080 at 60 fps represent design limits of the phone. In addition, the screen size on the 6S Plus and 7 Plus is 1920x1080. So if you're interested in playback on the phone, it doesn't make sense to send over more pixels then the screen can draw.

However, streaming video is a different matter. Since networks are slow and video is huge, it's typical to use lower resolutions, bitrates, and frame rates than the device's theoretical maximum.

The most detailed document giving recommendations for streaming is TN2224 Best Practices for Creating and Deploying HTTP Live Streaming Media for Apple Devices. Figure 3 in that document gives a table of recommended streaming parameters:

This table is from May 2016.

As you can see, Apple recommends the relatively low resolution of 768x432 as the highest recommended resolution for streaming over a cellular network. Of course this is just a recommendation and YMMV.

Audio

The question is about video, but that video generally has one or more audio tracks with it. The iPhone supports a few audio formats, but the most modern and by far most widely used is AAC. The iPhone 7 / 7 Plus, 6S Plus / 6S, SE all support AAC bitrates of 8 to 320 Kbps.

Container

The audio and video tracks go inside a container. The purpose of the container is to combine (interleave) the different tracks together, to store metadata, and to support seeking. The iPhone supports

QuickTime .mov,
MP4, and
MPEG-TS.

The .mov and .mp4 file formats are closely related (.mp4 is in fact based on .mov), however .mp4 is an ISO standard that has much wider support.

As noted above, you have to use MPEG-TS for videos longer than 10 minutes.

How to present UIActionSheet iOS Swift?

Generetic Action Sheet working for Swift 4, 4.2, 5

If you like a generic version that you can call from every ViewController and in every project try this one:

class Alerts {
 static func showActionsheet(viewController: UIViewController, title: String, message: String, actions: [(String, UIAlertActionStyle)], completion: @escaping (_ index: Int) -> Void) {
    let alertViewController = UIAlertController(title: title, message: message, preferredStyle: .actionSheet)
    for (index, (title, style)) in actions.enumerated() {
        let alertAction = UIAlertAction(title: title, style: style) { (_) in
            completion(index)
        }
        alertViewController.addAction(alertAction)
     }
     viewController.present(alertViewController, animated: true, completion: nil)
    }
}

Call like this in your ViewController.

    var actions: [(String, UIAlertActionStyle)] = []
    actions.append(("Action 1", UIAlertActionStyle.default))
    actions.append(("Action 2", UIAlertActionStyle.destructive))
    actions.append(("Action 3", UIAlertActionStyle.cancel))

    //self = ViewController
    Alerts.showActionsheet(viewController: self, title: "D_My ActionTitle", message: "General Message in Action Sheet", actions: actions) { (index) in
        print("call action \(index)")
        /*
         results
         call action 0
         call action 1
         call action 2
         */
    }

Attention: Maybe you're wondering why I add Action 1/2/3 but got results like 0,1,2. In the line for (index, (title, style)) in actions.enumerated() I get the index of actions. Arrays always begin with the index 0. So the completion is 0,1,2.

If you like to set a enum, an id or another identifier I would recommend to hand over an object in parameter actions.

Can an html element have multiple ids?

No. While the definition from w3c for HTML 4 doesn't seem to explicitly cover your question, the definition of the name and id attribute says no spaces in the identifier:

ID and NAME tokens must begin with a letter ([A-Za-z]) and may be followed by any number of letters, digits ([0-9]), hyphens ("-"), underscores ("_"), colons (":"), and periods (".").

Amazon products API - Looking for basic overview and information

I found a good alternative for requesting amazon product information here: http://api-doc.axesso.de/

Its an free rest api which return alle relevant information related to the requested product.

Using the slash character in Git branch name

just had the same issue, but i could not find the conflicting branch anymore.

in my case the repo had and "foo" branch before, but not anymore and i tried to create and checkout "foo/bar" from remote. As i said "foo" did not exist anymore, but the issue persisted.

In the end, the branch "foo" was still in the .git/config file, after deleting it everything was alright :)

How to open a specific port such as 9090 in Google Compute Engine

This question is old and Carlos Rojas's answer is good, but I think I should post few things which should be kept in mind while trying to open the ports.

The first thing to remember is that Networking section is renamed to VPC Networking. So if you're trying to find out where Firewall Rules option is available, go look at VPC Networking.

The second thing is, if you're trying to open ports on a Linux VM, make sure under no circumstances should you try to open port using ufw command. I tried using that and lost ssh access to the VM. So don't repeat my mistake.

The third thing is, if you're trying to open ports on a Windows VM, you'll need to create Firewall rules inside the VM also in Windows Firewall along with VPC Networking -> Firewall Rules. The port needs to be opened in both firewall rules, unlike Linux VM. So if you're not getting access to the port from outside the VM, check if you've opened the port in both GCP console and Windows Firewall.

The last (obvious) thing is, do not open ports unnecessarily. Close the ports, as soon as you no longer need it.

I hope this answer is useful.

How do you run a command for each line of a file?

Yes.

while read in; do chmod 755 "$in"; done < file.txt

This way you can avoid a cat process.

cat is almost always bad for a purpose such as this. You can read more about Useless Use of Cat.

How to find the port for MS SQL Server 2008?

I solved the problem by enabling the TCP/IP using the SQL Server Configuration Manager under Protocols for SQLEXPRESS2008, i restarted the service and now the "Server is listening on" shows up in the ERRORLOG file

How does bitshifting work in Java?

>> is the Arithmetic Right Shift operator. All of the bits in the first operand are shifted the number of places indicated by the second operand. The leftmost bits in the result are set to the same value as the leftmost bit in the original number. (This is so that negative numbers remain negative.)

Here's your specific case:

00101011
  001010 <-- Shifted twice to the right (rightmost bits dropped)
00001010 <-- Leftmost bits filled with 0s (to match leftmost bit in original number)

How to spyOn a value property (rather than a method) with Jasmine

Suppose there is a method like this that needs testing The src property of the tiny image needs checking

function reportABCEvent(cat, type, val) {
                var i1 = new Image(1, 1);
                var link = getABC('creosote');
                    link += "&category=" + String(cat);
                    link += "&event_type=" + String(type);
                    link += "&event_value=" + String(val);
                    i1.src = link;
                }

The spyOn() below causes the "new Image" to be fed the fake code from the test the spyOn code returns an object that only has a src property

As the variable "hook" is scoped to be visible in the fake code in the SpyOn and also later after the "reportABCEvent" is called

describe("Alphabetic.ads", function() {
    it("ABC events create an image request", function() {
    var hook={};
    spyOn(window, 'Image').andCallFake( function(x,y) {
          hook={ src: {} }
          return hook;
      }
      );
      reportABCEvent('testa', 'testb', 'testc');
      expect(hook.src).
      toEqual('[zubzub]&arg1=testa&arg2=testb&event_value=testc');
    });

This is for jasmine 1.3 but might work on 2.0 if the "andCallFake" is altered to the 2.0 name

What dependency is missing for org.springframework.web.bind.annotation.RequestMapping?

Sometimes there is some error in the local Maven repo. So please close your eclipse and delete the jar spring-webmvc from your local .m2 then open Eclipse and on the project press Update Maven Dependencies.

Then Eclipse will download the dependency again for you. That how I fixed the same problem.

How to display image from URL on Android

InputStream URLcontent = (InputStream) new URL(url).getContent();
Drawable image = Drawable.createFromStream(URLcontent, "your source link");

this has worked for me

How to get VM arguments from inside of Java application?

I haven't tried specifically getting the VM settings, but there is a wealth of information in the JMX utilities specifically the MXBean utilities. This would be where I would start. Hopefully you find something there to help you.

The sun website has a bunch on the technology:

http://java.sun.com/javase/6/docs/technotes/guides/management/mxbeans.html

Fatal error: Class 'ZipArchive' not found in

On ubuntu desktop, I had to do.

sudo apt-get install php5.6-zip

This installed the library but I still kept on getting the same error, so I had to restart apache using:

sudo service apache2 restart

and it worked.

How to load image (and other assets) in Angular an project?

Being specific to Angular2 to 5, we can bind image path using property binding as below. Image path is enclosed by the single quotation marks.

Sample example

<img [src]="'assets/img/klogo.png'" alt="image">

Rounded Button in Android

What's the best way to share data between activities?

All of the aforementioned answers are great... I'm just adding one no one had mentioned yet about persisting data through activities and that is to use the built in android SQLite database to persist relevant data... In fact you can place your databaseHelper in the application state and call it as needed throughout the activates.. Or just make a helper class and make the DB calls when needed... Just adding another layer for you to consider... But all of the other answers would suffice as well.. Really just preference

How do I script a "yes" response for installing programs?

If you want to just accept defaults you can use:

\n | ./shell_being_run

Link a photo with the cell in excel

Hold down the Alt key and drag the pictures to snap to the upper left corner of the cell.

Format the picture and in the Properties tab select "Move but don't size with cells"

Now you can sort the data table by any column and the pictures will stay with the respective data.

This post at SuperUser has a bit more background and screenshots: https://superuser.com/questions/712622/put-an-equation-object-in-an-excel-cell/712627#712627

How to create Android Facebook Key Hash?

Just run this code in your OnCreateView Or OnStart Actvity and This Function Return you Development Key Hash.

private String generateKeyHash() {
    try {
        PackageInfo info = getPackageManager().getPackageInfo(getPackageName(), PackageManager.GET_SIGNATURES);
        for (Signature signature : info.signatures) {
            MessageDigest md = (MessageDigest.getInstance("SHA"));
            md.update(signature.toByteArray());
            return new String(Base64.encode(md.digest(), 0));
        }
    }catch (Exception e) {
        Log.e("exception", e.toString());
    }
    return "key hash not found";
}

How to get host name with port from a http or https request

You can use HttpServletRequest.getScheme() to retrieve either "http" or "https".

Using it along with HttpServletRequest.getServerName() should be enough to rebuild the portion of the URL you need.

You don't need to explicitly put the port in the URL if you're using the standard ones (80 for http and 443 for https).

Edit: If your servlet container is behind a reverse proxy or load balancer that terminates the SSL, it's a bit trickier because the requests are forwarded to the servlet container as plain http. You have a few options:

1) Use HttpServletRequest.getHeader("x-forwarded-proto") instead; this only works if your load balancer sets the header correctly (Apache should afaik).

2) Configure a RemoteIpValve in JBoss/Tomcat that will make getScheme() work as expected. Again, this will only work if the load balancer sets the correct headers.

3) If the above don't work, you could configure two different connectors in Tomcat/JBoss, one for http and one for https, as described in this article.

The controller for path was not found or does not implement IController

In my case of legacy application, the issue occurred when I added below entry in web.config file under the node <system.webServer>

       <modules runAllManagedModulesForAllRequests="true"></modules>

When I removed it, the issue resolved.

Can you write virtual functions / methods in Java?

From wikipedia

In Java, all non-static methods are by default "virtual functions." Only methods marked with the keyword final, which cannot be overridden, along with private methods, which are not inherited, are non-virtual.

Adding items to end of linked list

class Node {
    Object data;
    Node next;
    Node(Object d,Node n) {
        data = d ;
        next = n ;
       }

   public static Node addLast(Node header, Object x) {
       // save the reference to the header so we can return it.
       Node ret = header;

       // check base case, header is null.
       if (header == null) {
           return new Node(x, null);
       }

       // loop until we find the end of the list
       while ((header.next != null)) {
           header = header.next;
       }

       // set the new node to the Object x, next will be null.
       header.next = new Node(x, null);
       return ret;
   }
}

Static Vs. Dynamic Binding in Java

There are three major differences between static and dynamic binding while designing the compilers and how variables and procedures are transferred to the runtime environment. These differences are as follows:

Static Binding: In static binding three following problems are discussed:

Definition of a procedure
Declaration of a name(variable, etc.)
Scope of the declaration

Dynamic Binding: Three problems that come across in the dynamic binding are as following:

Activation of a procedure
Binding of a name
Lifetime of a binding

Cast IList to List

In my case I had to do this, because none of the suggested solutions were available:

List<SubProduct> subProducts = Model.subproduct.Cast<SubProduct>().ToList();

Installing tensorflow with anaconda in windows

This documentation link is helpful and worked for me. Installs all dependencies and produces a working Anaconda. Or this answer is also helpful if you want to use it with spyder

Is it possible to assign numeric value to an enum in Java?

public enum EXIT_CODE {
    A(104), B(203);

    private int numVal;

    EXIT_CODE(int numVal) {
        this.numVal = numVal;
    }

    public int getNumVal() {
        return numVal;
    }
}

How to locate the php.ini file (xampp)

I've always found the easiest way is php -i and filtering down.

*nix (including MacOS):

php -i | grep "Loaded Configuration File"

Windows:

php -i | findstr /C:"Loaded Configuration File"

Of course this assumes your CLI environment is using the same PHP binaries as your actual web server.

You can always check that to be sure using which php in *nix and where php in Windows.

Trying to pull files from my Github repository: "refusing to merge unrelated histories"

While I'm all for unblocking people's work issues, I don't think "push --force" or "--allow_unrelated_histories" should be taught to new users as general solutions because they can cause real havoc to a repository when one uses them without understand why things aren't working in the first place.

When you have a situation like this where you started with a local repository, and want to make a remote on GitHub to share your work with, there is something to watch out for.

When you create the new online repository, there's an option "Initialize this repository with a README". If you read the fine print, it says "Skip this step if you’re importing an existing repository."

You may have checked that box. Or similarly, you made an add/commit online before you attempted an initial push. What happens is you create a unique commit history in each place and they can't be reconciled without the special allowance mentioned in Nevermore's answer (because git doesn't want you to operate that way). You can follow some of the advice mentioned here, or more simply just don't check that option next time you want to link some local files to a brand new remote; keeping the remote clean for that initial push.

Reference: my first experience with git + hub was to run into this same problem and do a lot of learning to understand what had happened and why.

Mockito. Verify method arguments

You don't need the eq matcher if you don't use other matchers.
You are not using the correct syntax - your method call should be outside the .verify(mock). You are now initiating verification on the result of the method call, without verifying anything (not making a method call). Hence all tests are passing.

You code should look like:

Mockito.verify(mock).mymethod(obj);
Mockito.verify(mock).mymethod(null);
Mockito.verify(mock).mymethod("something_else");

Abstract Class vs Interface in C++

interface were primarily made popular by Java.
Below are the nature of interface and its C++ equivalents:

interface can contain only body-less abstract methods; C++ equivalent is pure virtual methods, though they can/cannot have body
interface can contain only static final data members; C++ equivalent is static const data members which are compile time constants
Multiple interface can be implemented by a Java class, this facility is needed because a Java class can inherit only 1 class; C++ supports multiple inheritance straight away with help of virtual keyword when needed

Because of point 3 interface concept was never formally introduced in C++. Still one can have a flexibility to do that.

Besides this you can refer Bjarne's FAQ on this topic.

height style property doesn't work in div elements

This worked for me:

min-height: 14px;
height: 14px;

C++ String array sorting

This works for me:

#include <iostream>
#include <string>
#include <algorithm>

using namespace std;

int main() {
    string name[] = {"john", "bobby", "dear", "test1", "catherine", "nomi", "shinta", "martin", "abe", "may", "zeno", "zack", "angeal", "gabby"};

    int sname = sizeof(name)/sizeof(name[0]);

    sort(name, name + sname);

    for(int i = 0; i < sname; ++i)
        cout << name[i] << endl;

    return 0;
}

Compiling simple Hello World program on OS X via command line

Compiling it with gcc requires you to pass a number of command line options. Compile it with g++ instead.

Bind class toggle to window scroll event

This is my solution, it's not that tricky and allow you to use it for several markup throught a simple ng-class directive. Like so you can choose the class and the scrollPos for each case.

Your App.js :

angular.module('myApp',[])
    .controller('mainCtrl',function($window, $scope){
        $scope.scrollPos = 0;

        $window.onscroll = function(){
            $scope.scrollPos = document.body.scrollTop || document.documentElement.scrollTop || 0;
            $scope.$apply(); //or simply $scope.$digest();
        };
    });

Your index.html :

<html ng-app="myApp">
    <head></head>
    <body>
        <section ng-controller="mainCtrl">
            <p class="red" ng-class="{fix:scrollPos >= 100}">fix me when scroll is equals to 100</p>
            <p class="blue" ng-class="{fix:scrollPos >= 150}">fix me when scroll is equals to 150</p>
        </section>
    </body>
</html>

working JSFiddle here

EDIT :

As $apply() is actually calling $rootScope.$digest() you can directly use $scope.$digest() instead of $scope.$apply() for better performance depending on context.
Long story short : $apply() will always work but force the $digest on all scopes that may cause perfomance issue.

How to update and order by using ms sql

As stated in comments below, you can use also the SET ROWCOUNT clause, but just for SQL Server 2014 and older.

SET ROWCOUNT 10

UPDATE messages
SET status = 10 
WHERE status = 0 

SET ROWCOUNT 0

More info: http://msdn.microsoft.com/en-us/library/ms188774.aspx

Or with a temp table

DECLARE @t TABLE (id INT)
INSERT @t (id)
SELECT TOP 10 id
FROM messages
WHERE status = 0
ORDER BY priority DESC

UPDATE messages
SET status = 10
WHERE id IN (SELECT id FROM @t)

Where to install Android SDK on Mac OS X?

A simple way is changing to required sdk in some android project the number of

compileSdkVersion

in build.gradle file and you can install with the manager

Find common substring between two strings

This isn't the most efficient way to do it but it's what I could come up with and it works. If anyone can improve it, please do. What it does is it makes a matrix and puts 1 where the characters match. Then it scans the matrix to find the longest diagonal of 1s, keeping track of where it starts and ends. Then it returns the substring of the input string with the start and end positions as arguments.

Note: This only finds one longest common substring. If there's more than one, you could make an array to store the results in and return that Also, it's case sensitive so (Apple pie, apple pie) will return pple pie.

def longestSubstringFinder(str1, str2):
answer = ""

if len(str1) == len(str2):
    if str1==str2:
        return str1
    else:
        longer=str1
        shorter=str2
elif (len(str1) == 0 or len(str2) == 0):
    return ""
elif len(str1)>len(str2):
    longer=str1
    shorter=str2
else:
    longer=str2
    shorter=str1

matrix = numpy.zeros((len(shorter), len(longer)))

for i in range(len(shorter)):
    for j in range(len(longer)):               
        if shorter[i]== longer[j]:
            matrix[i][j]=1

longest=0

start=[-1,-1]
end=[-1,-1]    
for i in range(len(shorter)-1, -1, -1):
    for j in range(len(longer)):
        count=0
        begin = [i,j]
        while matrix[i][j]==1:

            finish=[i,j]
            count=count+1 
            if j==len(longer)-1 or i==len(shorter)-1:
                break
            else:
                j=j+1
                i=i+1

        i = i-count
        if count>longest:
            longest=count
            start=begin
            end=finish
            break

answer=shorter[int(start[0]): int(end[0])+1]
return answer

How to get user agent in PHP

You can use the jQuery ajax method link if you want to pass data from client to server. In this case you can use $_SERVER['HTTP_USER_AGENT'] variable to found browser user agent.

Show percent % instead of counts in charts of categorical variables

With ggplot2 version 2.1.0 it is

+ scale_y_continuous(labels = scales::percent)

strdup() - what does it do in C?

It makes a duplicate copy of the string passed in by running a malloc and strcpy of the string passed in. The malloc'ed buffer is returned to the caller, hence the need to run free on the return value.

Display open transactions in MySQL

Although there won't be any remaining transaction in the case, as @Johan said, you can see the current transaction list in InnoDB with the query below if you want.

SELECT * FROM information_schema.innodb_trx\G

From the document:

The INNODB_TRX table contains information about every transaction (excluding read-only transactions) currently executing inside InnoDB, including whether the transaction is waiting for a lock, when the transaction started, and the SQL statement the transaction is executing, if any.

Error: More than one module matches. Use skip-import option to skip importing the component into the closest module

There are two ways to solve this issue.

1) Skip (using --skip-import in command) default import and create component and once component is created import it manually wherever you want to use it.

ng generate component my-component --skip-import

2) Provide module name explicitly where you want it to be imported

ng generate  component  my-component --module=my-module.module

java.util.Date to XMLGregorianCalendar

I should like to take a step back and a modern look at this 10 years old question. The classes mentioned, Date and XMLGregorianCalendar, are old now. I challenge the use of them and offer alternatives.

Date was always poorly designed and is more than 20 years old. This is simple: don’t use it.
XMLGregorianCalendar is old too and has an old-fashioned design. As I understand it, it was used for producing dates and times in XML format for XML documents. Like 2009-05-07T19:05:45.678+02:00 or 2009-05-07T17:05:45.678Z. These formats agree well enough with ISO 8601 that the classes of java.time, the modern Java date and time API, can produce them, which we prefer.

No conversion necessary

For many (most?) purposes the modern replacement for a Date will be an Instant. An Instant is a point in time (just as a Date is).

    Instant yourInstant = // ...
    System.out.println(yourInstant);

An example output from this snippet:

2009-05-07T17:05:45.678Z

It’s the same as the latter of my example XMLGregorianCalendar strings above. As most of you know, it comes from Instant.toString being implicitly called by System.out.println. With java.time, in many cases we don’t need the conversions that in the old days we made between Date, Calendar, XMLGregorianCalendar and other classes (in some cases we do need conversions, though, I am showing you a couple in the next section).

Controlling the offset

Neither a Date nor in Instant has got a time zone nor a UTC offset. The previously accepted and still highest voted answer by Ben Noland uses the JVMs current default time zone for selecting the offset of the XMLGregorianCalendar. To include an offset in a modern object we use an OffsetDateTime. For example:

    ZoneId zone = ZoneId.of("America/Asuncion");
    OffsetDateTime dateTime = yourInstant.atZone(zone).toOffsetDateTime();
    System.out.println(dateTime);

2009-05-07T13:05:45.678-04:00

Again this conforms with XML format. If you want to use the current JVM time zone setting again, set zone to ZoneId.systemDefault().

What if I absolutely need an XMLGregorianCalendar?

There are more ways to convert Instant to XMLGregorianCalendar. I will present a couple, each with its pros and cons. First, just as an XMLGregorianCalendar produces a string like 2009-05-07T17:05:45.678Z, it can also be built from such a string:

    String dateTimeString = yourInstant.toString();
    XMLGregorianCalendar date2
            = DatatypeFactory.newInstance().newXMLGregorianCalendar(dateTimeString);
    System.out.println(date2);

2009-05-07T17:05:45.678Z

Pro: it’s short and I don’t think it gives any surprises. Con: To me it feels like a waste formatting the instant into a string and parsing it back.

    ZonedDateTime dateTime = yourInstant.atZone(zone);
    GregorianCalendar c = GregorianCalendar.from(dateTime);
    XMLGregorianCalendar date2 = DatatypeFactory.newInstance().newXMLGregorianCalendar(c);
    System.out.println(date2);

2009-05-07T13:05:45.678-04:00

Pro: It’s the official conversion. Controlling the offset comes naturally. Con: It goes through more steps and is therefore longer.

What if we got a Date?

If you got an old-fashioned Date object from a legacy API that you cannot afford to change just now, convert it to Instant:

    Instant i = yourDate.toInstant();
    System.out.println(i);

Output is the same as before:

2009-05-07T17:05:45.678Z

If you want to control the offset, convert further to an OffsetDateTime in the same way as above.

If you’ve got an old-fashioned Date and absolutely need an old-fashioned XMLGregorianCalendar, just use the answer by Ben Noland.

How to escape braces (curly brackets) in a format string in .NET

Almost there! The escape sequence for a brace is {{ or }} so for your example you would use:

string t = "1, 2, 3";
string v = String.Format(" foo {{{0}}}", t);

Joining two table entities in Spring Data JPA

For a typical example of employees owning one or more phones, see this wikibook section.

For your specific example, if you want to do a one-to-one relationship, you should change the next code in ReleaseDateType model:

@Column(nullable = true) 
private Integer media_Id;

for:

@OneToOne(fetch = FetchType.LAZY)
@JoinColumn(name="CACHE_MEDIA_ID", nullable=true)
private CacheMedia cacheMedia ;

and in CacheMedia model you need to add:

@OneToOne(cascade=ALL, mappedBy="ReleaseDateType")
private ReleaseDateType releaseDateType;

then in your repository you should replace:

@Query("Select * from A a  left join B b on a.id=b.id")
public List<ReleaseDateType> FindAllWithDescriptionQuery();

by:

//In this case a query annotation is not need since spring constructs the query from the method name
public List<ReleaseDateType> findByCacheMedia_Id(Integer id);

or by:

@Query("FROM ReleaseDateType AS rdt WHERE cm.rdt.cacheMedia.id = ?1")    //This is using a named query method
public List<ReleaseDateType> FindAllWithDescriptionQuery(Integer id);

Or if you prefer to do a @OneToMany and @ManyToOne relation, you should change the next code in ReleaseDateType model:

@Column(nullable = true) 
private Integer media_Id;

for:

@OneToMany(cascade=ALL, mappedBy="ReleaseDateType")
private List<CacheMedia> cacheMedias ;

and in CacheMedia model you need to add:

@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name="RELEASE_DATE_TYPE_ID", nullable=true)
private ReleaseDateType releaseDateType;

then in your repository you should replace:

@Query("Select * from A a  left join B b on a.id=b.id")
public List<ReleaseDateType> FindAllWithDescriptionQuery();

by:

//In this case a query annotation is not need since spring constructs the query from the method name
public List<ReleaseDateType> findByCacheMedias_Id(Integer id);

or by:

@Query("FROM ReleaseDateType AS rdt LEFT JOIN rdt.cacheMedias AS cm WHERE cm.id = ?1")    //This is using a named query method
public List<ReleaseDateType> FindAllWithDescriptionQuery(Integer id);

MySQL update CASE WHEN/THEN/ELSE

Try this

UPDATE `table` SET `uid` = CASE
    WHEN id = 1 THEN 2952
    WHEN id = 2 THEN 4925
    WHEN id = 3 THEN 1592
    ELSE `uid`
    END
WHERE id  in (1,2,3)

How to set encoding in .getJSON jQuery

If you want to use $.getJSON() you can add the following before the call :

$.ajaxSetup({
    scriptCharset: "utf-8",
    contentType: "application/json; charset=utf-8"
});

You can use the charset you want instead of utf-8.

The options are explained here.

contentType : When sending data to the server, use this content-type. Default is application/x-www-form-urlencoded, which is fine for most cases.

scriptCharset : Only for requests with jsonp or script dataType and GET type. Forces the request to be interpreted as a certain charset. Only needed for charset differences between the remote and local content.

You may need one or both ...

Getting the parent of a directory in Bash

Just use echo $(cd ../ && pwd) while working in the directory whose parent dir you want to find out. This chain also has the added benefit of not having trailing slashes.

Extracting the top 5 maximum values in excel

=VLOOKUP(LARGE(A1:A10,ROW()),A1:B10,2,0)

Type this formula in first row of your sheet then drag down till fifth row...

its a simple vlookup, which finds the large value in array (A1:A10), the ROW() function gives the row number (first row = 1, second row =2 and so on) and further is the lookup criteria.

Note: You can replace the ROW() to 1,2,3,4,5 as requried...if you have this formula in other than the 1st row, then make sure you subtract some numbers from the row() to get accurate results.

EDIT: TO check tie results

This is possible, you need to add a helper column to the sheet, here is the link. Do let me know in case things seems to be messy....

Zero an array in C code

Note: You can use memset with any character.

Example:

int arr[20];
memset(arr, 'A', sizeof(arr));

Also could be partially filled

int arr[20];
memset(&arr[5], 0, 10);

But be carefull. It is not limited for the array size, you could easily cause severe damage to your program doing something like this:

int arr[20];
memset(arr, 0, 200);

It is going to work (under windows) and zero memory after your array. It might cause damage to other variables values.

How to force file download with PHP

Read the docs about built-in PHP function readfile

$file_url = 'http://www.myremoteserver.com/file.exe';
header('Content-Type: application/octet-stream');
header("Content-Transfer-Encoding: Binary"); 
header("Content-disposition: attachment; filename=\"" . basename($file_url) . "\""); 
readfile($file_url);

Also make sure to add proper content type based on your file application/zip, application/pdf etc. - but only if you do not want to trigger the save-as dialog.

What is the pythonic way to unpack tuples?

Refer https://docs.python.org/2/tutorial/controlflow.html#unpacking-argument-lists

 dt = datetime.datetime(*t[:7])

Crop image in android

hope you are doing well. you can use my code to crop image.you just have to make a class and use this class into your XMl and java classes. Crop image. you can crop your selected image into circle and square into many of option. hope fully it will works for you.because this is totally manageable for you and you can change it according to you.

enjoy your work :)

If my interface must return Task what is the best way to have a no-operation implementation?

I prefer the Task completedTask = Task.CompletedTask; solution of .Net 4.6, but another approach is to mark the method async and return void:

    public async Task WillBeLongRunningAsyncInTheMajorityOfImplementations()
    {
    }

You'll get a warning (CS1998 - Async function without await expression), but this is safe to ignore in this context.

Sequelize, convert entity to plain object

you can use the query options {raw: true} to return the raw result. Your query should like follows:

db.Sensors.findAll({
  where: {
    nodeid: node.nodeid
  },
  raw: true,
})

also if you have associations with include that gets flattened. So, we can use another parameter nest:true

db.Sensors.findAll({
  where: {
    nodeid: node.nodeid
  },
  raw: true,
  nest: true,
})

Run reg command in cmd (bat file)?

You could also just create a Group Policy Preference and have it create the reg key for you. (no scripting involved)

Git Pull vs Git Rebase

git pull and git rebase are not interchangeable, but they are closely connected.

git pull fetches the latest changes of the current branch from a remote and applies those changes to your local copy of the branch. Generally this is done by merging, i.e. the local changes are merged into the remote changes. So git pull is similar to git fetch & git merge.

Rebasing is an alternative to merging. Instead of creating a new commit that combines the two branches, it moves the commits of one of the branches on top of the other.

You can pull using rebase instead of merge (git pull --rebase). The local changes you made will be rebased on top of the remote changes, instead of being merged with the remote changes.

Atlassian has some excellent documentation on merging vs. rebasing.

RegEx for matching "A-Z, a-z, 0-9, _" and "."

regex: /^[a-zA-Z0-9_.]$/i

This works

How to start/stop/restart a thread in Java?

Once a thread stops you cannot restart it. However, there is nothing stopping you from creating and starting a new thread.

Option 1: Create a new thread rather than trying to restart.

Option 2: Instead of letting the thread stop, have it wait and then when it receives notification you can allow it to do work again. This way the thread never stops and will never need to be restarted.

Edit based on comment:

To "kill" the thread you can do something like the following.

yourThread.setIsTerminating(true); // tell the thread to stop
yourThread.join(); // wait for the thread to stop

Javascript: How to pass a function with string parameters as a parameter to another function

Me, I'd do it something like this:

HTML:

onclick="myfunction({path:'/myController/myAction', ok:myfunctionOnOk, okArgs:['/myController2/myAction2','myParameter2'], cancel:myfunctionOnCancel, cancelArgs:['/myController3/myAction3','myParameter3']);"

JS:

function myfunction(params)
{
  var path = params.path;

  /* do stuff */

  // on ok condition 
  params.ok(params.okArgs);

  // on cancel condition
  params.cancel(params.cancelArgs);  
}

But then I'd also probable be binding a closure to a custom subscribed event. You need to add some detail to the question really, but being first-class functions are easily passable and getting params to them can be done any number of ways. I would avoid passing them as string labels though, the indirection is error prone.

Delimiter must not be alphanumeric or backslash and preg_match

Please try with this

 $pattern = "/My name is '\(.*\)' and im fine/";

How to create jobs in SQL Server Express edition

SQL Server Express doesn't include SQL Server Agent, so it's not possible to just create SQL Agent jobs.

What you can do is:
You can create jobs "manually" by creating batch files and SQL script files, and running them via Windows Task Scheduler.
For example, you can backup your database with two files like this:

backup.bat:

sqlcmd -i backup.sql

backup.sql:

backup database TeamCity to disk = 'c:\backups\MyBackup.bak'

Just put both files into the same folder and exeute the batch file via Windows Task Scheduler.

The first file is just a Windows batch file which calls the sqlcmd utility and passes a SQL script file.
The SQL script file contains T-SQL. In my example, it's just one line to backup a database, but you can put any T-SQL inside. For example, you could do some UPDATE queries instead.

If the jobs you want to create are for backups, index maintenance or integrity checks, you could also use the excellent Maintenance Solution by Ola Hallengren.

It consists of a bunch of stored procedures (and SQL Agent jobs for non-Express editions of SQL Server), and in the FAQ there’s a section about how to run the jobs on SQL Server Express:

How do I get started with the SQL Server Maintenance Solution on SQL Server Express?

SQL Server Express has no SQL Server Agent. Therefore, the execution of the stored procedures must be scheduled by using cmd files and Windows Scheduled Tasks. Follow these steps.

SQL Server Express has no SQL Server Agent. Therefore, the execution of the stored procedures must be scheduled by using cmd files and Windows Scheduled Tasks. Follow these steps.

Download MaintenanceSolution.sql.

Execute MaintenanceSolution.sql. This script creates the stored procedures that you need.

Create cmd files to execute the stored procedures; for example:
sqlcmd -E -S .\SQLEXPRESS -d master -Q "EXECUTE dbo.DatabaseBackup @Databases = 'USER_DATABASES', @Directory = N'C:\Backup', @BackupType = 'FULL'" -b -o C:\Log\DatabaseBackup.txt

In Windows Scheduled Tasks, create tasks to call the cmd files.

Schedule the tasks.

Start the tasks and verify that they are completing successfully.

What are the differences between a HashMap and a Hashtable in Java?

HashMap is emulated and therefore usable in GWT client code whereas Hashtable is not.

OSError: [WinError 193] %1 is not a valid Win32 application

The file hello.py is not an executable file. You need to specify a file like python.exe

try following:

import sys
subprocess.call([sys.executable, 'hello.py', 'htmlfilename.htm'])

Using Mockito to mock classes with generic parameters

You could always create an intermediate class/interface that would satisfy the generic type that you are wanting to specify. For example, if Foo was an interface, you could create the following interface in your test class.

private interface FooBar extends Foo<Bar>
{
}

In situations where Foo is a non-final class, you could just extend the class with the following code and do the same thing:

public class FooBar extends Foo<Bar>
{
}

Then you could consume either of the above examples with the following code:

Foo<Bar> mockFoo = mock(FooBar.class);
when(mockFoo.getValue()).thenReturn(new Bar());

How do I return clean JSON from a WCF Service?

This is accomplished in web.config for your webservice. Set the bindingBehavior to <webHttp> and you will see the clean JSON. The extra "[d]" is set by the default behavior which you need to overwrite.

See in addition this blogpost: http://blog.clauskonrad.net/2010/11/how-to-expose-json-endpoint-from-wcf.html

SUM of grouped COUNT in SQL Query

You can use ROLLUP

select nvl(name, 'SUM'), count(*)
from table
group by rollup(name)

jinja2.exceptions.TemplateNotFound error

You put your template in the wrong place. From the Flask docs:

Flask will look for templates in the templates folder. So if your application is a module, this folder is next to that module, if it’s a package it’s actually inside your package: See the docs for more information: http://flask.pocoo.org/docs/quickstart/#rendering-templates

SQL Server loop - how do I loop through a set of records

By using cursor you can easily iterate through records individually and print records separately or as a single message including all the records.

DECLARE @CustomerID as INT;
declare @msg varchar(max)
DECLARE @BusinessCursor as CURSOR;

SET @BusinessCursor = CURSOR FOR
SELECT CustomerID FROM Customer WHERE CustomerID IN ('3908745','3911122','3911128','3911421')

OPEN @BusinessCursor;
    FETCH NEXT FROM @BusinessCursor INTO @CustomerID;
    WHILE @@FETCH_STATUS = 0
        BEGIN
            SET @msg = '{
              "CustomerID": "'+CONVERT(varchar(10), @CustomerID)+'",
              "Customer": {
                "LastName": "LastName-'+CONVERT(varchar(10), @CustomerID) +'",
                "FirstName": "FirstName-'+CONVERT(varchar(10), @CustomerID)+'",    
              }
            }|'
        print @msg
    FETCH NEXT FROM @BusinessCursor INTO @CustomerID;
END

Return multiple values from a SQL Server function

Another option would be to use a procedure with output parameters - Using a Stored Procedure with Output Parameters

Using an integer as a key in an associative array in JavaScript

Use an object, as people are saying. However, note that you can not have integer keys. JavaScript will convert the integer to a string. The following outputs 20, not undefined:

var test = {}
test[2300] = 20;
console.log(test["2300"]);

Custom thread pool in Java 8 parallel stream

If you don't want to rely on implementation hacks, there's always a way to achieve the same by implementing custom collectors that will combine map and collect semantics... and you wouldn't be limited to ForkJoinPool:

list.stream()
  .collect(parallel(i -> process(i), executor, 4))
  .join()

Luckily, it's done already here and available on Maven Central: http://github.com/pivovarit/parallel-collectors

Disclaimer: I wrote it and take responsibility for it.

Thread-safe List<T> property

I would think making a sample ThreadSafeList class would be easy:

public class ThreadSafeList<T> : IList<T>
{
    protected List<T> _internalList = new List<T>();

    // Other Elements of IList implementation

    public IEnumerator<T> GetEnumerator()
    {
        return Clone().GetEnumerator();
    }

    System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
    {
        return Clone().GetEnumerator();
    }

    protected static object _lock = new object();

    public List<T> Clone()
    {
        List<T> newList = new List<T>();

        lock (_lock)
        {
            _internalList.ForEach(x => newList.Add(x));
        }

        return newList;
    }
}

You simply clone the list before requesting an enumerator, and thus any enumeration is working off a copy that can't be modified while running.

Java program to connect to Sql Server and running the sample query From Eclipse

Add sqlserver.jar Here is link

As the name suggests ClassNotFoundException in Java is a subclass of java.lang.Exception and Comes when Java Virtual Machine tries to load a particular class and doesn't found the requested class in classpath.

Another important point about this Exception is that, It is a checked Exception and you need to provide explicitly Exception handling while using methods which can possibly throw ClassNotFoundException in java either by using try-catch block or by using throws clause.

Oracle docs

public class ClassNotFoundException
 extends ReflectiveOperationException

Thrown when an application tries to load in a class through its string name using:

The forName method in class Class.
The findSystemClass method in class ClassLoader .
The loadClass method in class ClassLoader.

but no definition for the class with the specified name could be found.

Laravel Soft Delete posts

Here is the details from laravel.com

http://laravel.com/docs/eloquent#soft-deleting

When soft deleting a model, it is not actually removed from your database. Instead, a deleted_at timestamp is set on the record. To enable soft deletes for a model, specify the softDelete property on the model:

class User extends Eloquent {

    protected $softDelete = true;

}

To add a deleted_at column to your table, you may use the softDeletes method from a migration:

$table->softDeletes();

Now, when you call the delete method on the model, the deleted_at column will be set to the current timestamp. When querying a model that uses soft deletes, the "deleted" models will not be included in query results.

How do you change Background for a Button MouseOver in WPF?

Just want to share my button style from my ResourceDictionary that i've been using. You can freely change the onHover background at the style triggers. "ColorAnimation To = *your desired BG(i.e #FFCEF7A0)". The button BG will also automatically revert to its original BG after the mouseOver state.You can even set how fast the transition.

Resource Dictionary

<Style x:Key="Flat_Button" TargetType="{x:Type Button}">
    <Setter Property="Width" Value="100"/>
    <Setter Property="Height" Value="50"/>
    <Setter Property="Margin" Value="2"/>
    <Setter Property="FontFamily" Value="Arial Narrow"/>
    <Setter Property="FontSize" Value="12px"/>
    <Setter Property="FontWeight" Value="Bold"/>
    <Setter Property="Cursor" Value="Hand"/>
    <Setter Property="Foreground">
        <Setter.Value>
            <SolidColorBrush Opacity="1" Color="White"/>
        </Setter.Value>
    </Setter>
    <Setter Property="Background" >
        <Setter.Value>
            <SolidColorBrush Opacity="1" Color="#28C2FF" />
        </Setter.Value>
    </Setter>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type Button}">

                <Border x:Name="border"
                         SnapsToDevicePixels="True"
                         BorderThickness="1"
                         Padding="4,2"
                         BorderBrush="Gray"
                         CornerRadius="3"
                         Background="{TemplateBinding Background}">
                    <Grid>
                        <ContentPresenter 
                        Margin="2"
                        HorizontalAlignment="Center"
                        VerticalAlignment="Center"
                        RecognizesAccessKey="True" />

                    </Grid>
                </Border>

            </ControlTemplate>
        </Setter.Value>
    </Setter>

    <Style.Triggers>
        <Trigger Property="IsMouseOver" Value="true">
            <Trigger.EnterActions>
                <BeginStoryboard>
                    <Storyboard>
                        <ColorAnimation To="#D2F898"
                                        Storyboard.TargetProperty="(Control.Background).(SolidColorBrush.Color)" 
                                        FillBehavior="HoldEnd" Duration="0:0:0.25" AutoReverse="False" RepeatBehavior="1x"/>
                    </Storyboard>
                </BeginStoryboard>
            </Trigger.EnterActions>

            <Trigger.ExitActions>
                <BeginStoryboard>
                    <Storyboard>
                        <ColorAnimation
                                            Storyboard.TargetProperty="(Control.Background).(SolidColorBrush.Color)" 
                                            FillBehavior="HoldEnd" Duration="0:0:0.25" AutoReverse="False" RepeatBehavior="1x"/>
                    </Storyboard>
                </BeginStoryboard>
            </Trigger.ExitActions>

        </Trigger>


    </Style.Triggers>
</Style>

all you have to do is call the style.

Example Implementation

<Button Style="{StaticResource Flat_Button}" Height="Auto"Width="Auto">  
     <StackPanel>
     <TextBlock Text="SAVE" FontFamily="Arial" FontSize="10.667"/>
     </StackPanel>
</Button>

How to check if a given directory exists in Ruby

You could use Kernel#test:

test ?d, 'some directory'

it gets it's origins from https://ss64.com/bash/test.html you will notice bash test has this flag -d to test if a directory exists -d file True if file is a Directory. [[ -d demofile ]]

Cannot find vcvarsall.bat when running a Python script

this worked for me (python 2.6):

installed free ms visual studio 2008 from http://www.microsoft.com/visualstudio/en-us/products/2008-editions/express

copied vcvarsall.bat from "C:\Program Files\Microsoft Visual Studio 9.0\VC>" to "C:\Program Files\Microsoft Visual Studio 9.0\Common7\Tools\"

the installer had already set this environment variable:

VS90COMNTOOLS=C:\Program Files\Microsoft Visual Studio 9.0\Common7\Tools\

Make EditText ReadOnly

My approach to this has been creating a custom TextWatcher class as follows:

class ReadOnlyTextWatcher implements TextWatcher {
    private final EditText textEdit;
    private String originalText;
    private boolean mustUndo = true;

    public ReadOnlyTextWatcher(EditText textEdit) {
        this.textEdit = textEdit;
    }

    @Override
    public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
        if (mustUndo) {
            originalText = charSequence.toString();
        }
    }

    @Override
    public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {

    }

    @Override
    public void afterTextChanged(Editable editable) {
        if (mustUndo) {
            mustUndo = false;
            textEdit.setText(originalText);
        } else {
            mustUndo = true;
        }
    }
}

Then you just add that watcher to any field you want to be read only despite being enabled:

editText.addTextChangedListener(new ReadOnlyTextWatcher(editText));

Python Graph Library

Have you looked at python-graph? I haven't used it myself, but the project page looks promising.

Why am I getting "(304) Not Modified" error on some links when using HttpWebRequest?

It is not an issue it is because of caching...

To overcome this add a timestamp to your endpoint call, e.g. axios.get('/api/products').

After timestamp it should be axios.get(/api/products?${Date.now()}.

It will resolve your 304 status code.

Best way to test exceptions with Assert to ensure they will be thrown

Suggest using NUnit's clean delegate syntax.

Example for testing ArgumentNullExeption:

[Test]
[TestCase(null)]
public void FooCalculation_InvalidInput_ShouldThrowArgumentNullExeption(string text)
{
    var foo = new Foo();
    Assert.That(() => foo.Calculate(text), Throws.ArgumentNullExeption);

    //Or:
    Assert.That(() => foo.Calculate(text), Throws.Exception.TypeOf<ArgumentNullExeption>);
}

How to return an array from a function?

It is not possible to return an array from a C++ function. 8.3.5[dcl.fct]/6:

Functions shall not have a return type of type array or function[...]

Most commonly chosen alternatives are to return a value of class type where that class contains an array, e.g.

struct ArrayHolder
{
    int array[10];
};

ArrayHolder test();

Or to return a pointer to the first element of a statically or dynamically allocated array, the documentation must indicate to the user whether he needs to (and if so how he should) deallocate the array that the returned pointer points to.

E.g.

int* test2()
{
    return new int[10];
}

int* test3()
{
    static int array[10];
    return array;
}

While it is possible to return a reference or a pointer to an array, it's exceedingly rare as it is a more complex syntax with no practical advantage over any of the above methods.

int (&test4())[10]
{
        static int array[10];
        return array;
}

int (*test5())[10]
{
        static int array[10];
        return &array;
}

SQL Server 2012 column identity increment jumping from 6 to 1000+ on 7th entry

While trace flag 272 may work for many, it definitely won't work for hosted Sql Server Express installations. So, I created an identity table, and use this through an INSTEAD OF trigger. I'm hoping this helps someone else, and/or gives others an opportunity to improve my solution. The last line allows returning the last identity column added. Since I typically use this to add a single row, this works to return the identity of a single inserted row.

The identity table:

CREATE TABLE [dbo].[tblsysIdentities](
[intTableId] [int] NOT NULL,
[intIdentityLast] [int] NOT NULL,
[strTable] [varchar](100) NOT NULL,
[tsConcurrency] [timestamp] NULL,
CONSTRAINT [PK_tblsysIdentities] PRIMARY KEY CLUSTERED 
(
    [intTableId] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF,  ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

and the insert trigger:

-- INSERT --
IF OBJECT_ID ('dbo.trgtblsysTrackerMessagesIdentity', 'TR') IS NOT NULL
   DROP TRIGGER dbo.trgtblsysTrackerMessagesIdentity;
GO
CREATE TRIGGER trgtblsysTrackerMessagesIdentity
ON dbo.tblsysTrackerMessages
INSTEAD OF INSERT AS 
BEGIN
    DECLARE @intTrackerMessageId INT
    DECLARE @intRowCount INT

    SET @intRowCount = (SELECT COUNT(*) FROM INSERTED)

    SET @intTrackerMessageId = (SELECT intIdentityLast FROM tblsysIdentities WHERE intTableId=1)
    UPDATE tblsysIdentities SET intIdentityLast = @intTrackerMessageId + @intRowCount WHERE intTableId=1

    INSERT INTO tblsysTrackerMessages( 
    [intTrackerMessageId],
    [intTrackerId],
    [strMessage],
    [intTrackerMessageTypeId],
    [datCreated],
    [strCreatedBy])
    SELECT @intTrackerMessageId + ROW_NUMBER() OVER (ORDER BY [datCreated]) AS [intTrackerMessageId], 
    [intTrackerId],
   [strMessage],
   [intTrackerMessageTypeId],
   [datCreated],
   [strCreatedBy] FROM INSERTED;

   SELECT TOP 1 @intTrackerMessageId + @intRowCount FROM INSERTED;
END

Can I use CASE statement in a JOIN condition?

Instead, you simply JOIN to both tables, and in your SELECT clause, return data from the one that matches:

I suggest you to go through this link Conditional Joins in SQL Server and T-SQL Case Statement in a JOIN ON Clause

e.g.

    SELECT  *
FROM    sys.indexes i
        JOIN sys.partitions p
            ON i.index_id = p.index_id 
        JOIN sys.allocation_units a
            ON a.container_id =
            CASE
               WHEN a.type IN (1, 3)
                   THEN  p.hobt_id 
               WHEN a.type IN (2)
                   THEN p.partition_id
               END

Edit: As per comments.

You can not specify the join condition as you are doing.. Check the query above that have no error. I have take out the common column up and the right column value will be evaluated on condition.

Array of PHP Objects

Yes, its possible to have array of objects in PHP.

class MyObject {
  private $property;

  public function  __construct($property) {
    $this->Property = $property;
  }
}
$ListOfObjects[] = new myObject(1); 
$ListOfObjects[] = new myObject(2); 
$ListOfObjects[] = new myObject(3); 
$ListOfObjects[] = new myObject(4); 

print "<pre>";
print_r($ListOfObjects);
print "</pre>";

Access to Image from origin 'null' has been blocked by CORS policy

A solution to this is to serve your code, and make it run on a server, you could use web server for chrome to easily serve your pages.

What does asterisk * mean in Python?

I only have one thing to add that wasn't clear from the other answers (for completeness's sake).

You may also use the stars when calling the function. For example, say you have code like this:

>>> def foo(*args):
...     print(args)
...
>>> l = [1,2,3,4,5]

You can pass the list l into foo like so...

>>> foo(*l)
(1, 2, 3, 4, 5)

You can do the same for dictionaries...

>>> def foo(**argd):
...     print(argd)
...
>>> d = {'a' : 'b', 'c' : 'd'}
>>> foo(**d)
{'a': 'b', 'c': 'd'}

Creating a timer in python

# this is kind of timer, stop after the input minute run out.    
import time
min=int(input('>>')) 
while min>0:
    print min
    time.sleep(60) # every minute 
    min-=1  # take one minute

jquery select element by xpath

First create an xpath selector function.

function _x(STR_XPATH) {
    var xresult = document.evaluate(STR_XPATH, document, null, XPathResult.ANY_TYPE, null);
    var xnodes = [];
    var xres;
    while (xres = xresult.iterateNext()) {
        xnodes.push(xres);
    }

    return xnodes;
}

To use the xpath selector with jquery, you can do like this:

$(_x('/html/.//div[@id="text"]')).attr('id', 'modified-text');

Hope this can help.

How to copy and edit files in Android shell?

To copy dirs, it seems you can use adb pull <remote> <local> if you want to copy file/dir from device, and adb push <local> <remote> to copy file/dir to device. Alternatively, just to copy a file, you can use a simple trick: cat source_file > dest_file. Note that this does not work for user-inaccessible paths.

To edit files, I have not found a simple solution, just some possible workarounds. Try this, it seems you can (after the setup) use it to edit files like busybox vi <filename>. Nano seems to be possible to use too.

How to use PowerShell select-string to find more than one pattern in a file?

To search for multiple matches in each file, we can sequence several Select-String calls:

Get-ChildItem C:\Logs |
  where { $_ | Select-String -Pattern 'VendorEnquiry' } |
  where { $_ | Select-String -Pattern 'Failed' } |
  ...

At each step, files that do not contain the current pattern will be filtered out, ensuring that the final list of files contains all of the search terms.

Rather than writing out each Select-String call manually, we can simplify this with a filter to match multiple patterns:

filter MultiSelect-String( [string[]]$Patterns ) {
  # Check the current item against all patterns.
  foreach( $Pattern in $Patterns ) {
    # If one of the patterns does not match, skip the item.
    $matched = @($_ | Select-String -Pattern $Pattern)
    if( -not $matched ) {
      return
    }
  }

  # If all patterns matched, pass the item through.
  $_
}

Get-ChildItem C:\Logs | MultiSelect-String 'VendorEnquiry','Failed',...

Now, to satisfy the "Logtime about 11:30 am" part of the example would require finding the log time corresponding to each failure entry. How to do this is highly dependent on the actual structure of the files, but testing for "about" is relatively simple:

function AboutTime( [DateTime]$time, [DateTime]$target, [TimeSpan]$epsilon ) {
  $time -le ($target + $epsilon) -and $time -ge ($target - $epsilon)
}

PS> $epsilon = [TimeSpan]::FromMinutes(5)
PS> $target = [DateTime]'11:30am'
PS> AboutTime '11:00am' $target $epsilon
False
PS> AboutTime '11:28am' $target $epsilon
True
PS> AboutTime '11:35am' $target $epsilon
True

Creating a div element in jQuery

document.createElement('div');

javax.naming.NoInitialContextException - Java

If working on EJB client library:

You need to mention the argument for getting the initial context.

InitialContext ctx = new InitialContext();

If you do not, it will look in the project folder for properties file. Also you can include the properties credentials or values in your class file itself as follows:

Properties props = new Properties();
props.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");
props.put(Context.URL_PKG_PREFIXES, "org.jboss.ejb.client.naming");
props.put(Context.PROVIDER_URL, "jnp://localhost:1099");

InitialContext ctx = new InitialContext(props);

URL_PKG_PREFIXES: Constant that holds the name of the environment property for specifying the list of package prefixes to use when loading in URL context factories.

The EJB client library is the primary library to invoke remote EJB components.
This library can be used through the InitialContext. To invoke EJB components the library creates an EJB client context via a URL context factory. The only necessary configuration is to parse the value org.jboss.ejb.client.naming for the java.naming.factory.url.pkgs property to instantiate an InitialContext.

Refresh page after form submitting

  //insert this php code, at the end after your closing html tag. 

  <?php
  //setting connection to database
  $con = mysqli_connect("localhost","your-username","your-
  passowrd","your-dbname");

  if(isset($_POST['submit_button'])){

     $txt_area = $_POST['update']; 

       $Our_query= "INSERT INTO your-table-name (field1name, field2name) 
                  VALUES ('abc','def')"; // values should match data 
                 //  type to field names

        $insert_query = mysqli_query($con, $Our_query);

        if($insert_query){
            echo "<script>window.open('form.php','_self') </script>"; 
             // supposing form.php is where you have created this form

          }



   } //if statement close         
  ?>

Hope this helps.

Converting char* to float or double

printf("price: %d, %f",temp,ftemp); 
              ^^^

This is your problem. Since the arguments are type double and float, you should be using %f for both (since printf is a variadic function, ftemp will be promoted to double).

%d expects the corresponding argument to be type int, not double.

Variadic functions like printf don't really know the types of the arguments in the variable argument list; you have to tell it with the conversion specifier. Since you told printf that the first argument is supposed to be an int, printf will take the next sizeof (int) bytes from the argument list and interpret it as an integer value; hence the first garbage number.

Now, it's almost guaranteed that sizeof (int) < sizeof (double), so when printf takes the next sizeof (double) bytes from the argument list, it's probably starting with the middle byte of temp, rather than the first byte of ftemp; hence the second garbage number.

Use %f for both.

How to generate a random integer number from within a range

Here is a formula if you know the max and min values of a range, and you want to generate numbers inclusive in between the range:

r = (rand() % (max + 1 - min)) + min

Get sum of MySQL column in PHP

You can completely handle it in the MySQL query:

SELECT SUM(column_name) FROM table_name;

Using PDO (mysql_query is deprecated)

$stmt = $handler->prepare('SELECT SUM(value) AS value_sum FROM codes');
$stmt->execute();

$row = $stmt->fetch(PDO::FETCH_ASSOC);
$sum = $row['value_sum'];

Or using mysqli:

$result = mysqli_query($conn, 'SELECT SUM(value) AS value_sum FROM codes'); 
$row = mysqli_fetch_assoc($result); 
$sum = $row['value_sum'];

What is the difference between .yaml and .yml extension?

File extensions do not have any bearing or impact on the content of the file. You can hold YAML content in files with any extension: .yml, .yaml or indeed anything else.

The (rather sparse) YAML FAQ recommends that you use .yaml in preference to .yml, but for historic reasons many Windows programmers are still scared of using extensions with more than three characters and so opt to use .yml instead.

So, what really matters is what is inside the file, rather than what its extension is.

What should I do when 'svn cleanup' fails?

After going through most of the solutions that are cited here, I still was getting the error.

The issue was case insensitive OS X. Checking out a directory that has two files with the same name, but different capitalization causes an issue. For example, ApproximationTest.java and Approximationtest.java should not be in the same directory. As soon as we get rid of one of the file, the issue goes away.

If statement in select (ORACLE)

So simple you can use case statement here.

CASE WHEN ISSUE_DIVISION = ISSUE_DIVISION_2 THEN 
         CASE WHEN  ISSUE_DIVISION is null then "Null Value found" //give your option
         Else 1 End
ELSE 0 END As Issue_Division_Result

@property retain, assign, copy, nonatomic in Objective-C

Atomic property can be accessed by only one thread at a time. It is thread safe. Default is atomic .Please note that there is no keyword atomic

Nonatomic means multiple thread can access the item .It is thread unsafe

So one should be very careful while using atomic .As it affect the performance of your code

Check if a string is a valid Windows directory (folder) path

Call Path.GetFullPath; it will throw exceptions if the path is invalid.

To disallow relative paths (such as Word), call Path.IsPathRooted.

How do I compile the asm generated by GCC?

If you have main.s file. you can generate object file by GCC and also as

# gcc -c main.s
# as main.s -o main.o

check this link, it will help you learn some binutils of GCC http://www.thegeekstuff.com/2017/01/gnu-binutils-commands/

An error has occured. Please see log file - eclipse juno

Deleting metadata folder might not work in this case. Or eclipse -clean command. Or reinstall eclipse might not solve this.

Instead try deleting other java versions you might have in your machine.

Check what you have right now using this:

/usr/libexec/java_home -V

Delete other java versions which you don't want, following below command:

sudo rm -rf /System/Library/Java/JavaVirtualMachines/java-version.jdk

This should resolve your issue.

Sending files using POST with HttpURLConnection

I have no idea why the HttpURLConnection class does not provide any means to send files without having to compose the file wrapper manually. Here's what I ended up doing, but if someone knows a better solution, please let me know.

Input data:

Bitmap bitmap = myView.getBitmap();

Static stuff:

String attachmentName = "bitmap";
String attachmentFileName = "bitmap.bmp";
String crlf = "\r\n";
String twoHyphens = "--";
String boundary =  "*****";

Setup the request:

HttpURLConnection httpUrlConnection = null;
URL url = new URL("http://example.com/server.cgi");
httpUrlConnection = (HttpURLConnection) url.openConnection();
httpUrlConnection.setUseCaches(false);
httpUrlConnection.setDoOutput(true);

httpUrlConnection.setRequestMethod("POST");
httpUrlConnection.setRequestProperty("Connection", "Keep-Alive");
httpUrlConnection.setRequestProperty("Cache-Control", "no-cache");
httpUrlConnection.setRequestProperty(
    "Content-Type", "multipart/form-data;boundary=" + this.boundary);

Start content wrapper:

DataOutputStream request = new DataOutputStream(
    httpUrlConnection.getOutputStream());

request.writeBytes(this.twoHyphens + this.boundary + this.crlf);
request.writeBytes("Content-Disposition: form-data; name=\"" +
    this.attachmentName + "\";filename=\"" + 
    this.attachmentFileName + "\"" + this.crlf);
request.writeBytes(this.crlf);

Convert Bitmap to ByteBuffer:

//I want to send only 8 bit black & white bitmaps
byte[] pixels = new byte[bitmap.getWidth() * bitmap.getHeight()];
for (int i = 0; i < bitmap.getWidth(); ++i) {
    for (int j = 0; j < bitmap.getHeight(); ++j) {
        //we're interested only in the MSB of the first byte, 
        //since the other 3 bytes are identical for B&W images
        pixels[i + j] = (byte) ((bitmap.getPixel(i, j) & 0x80) >> 7);
    }
}

request.write(pixels);

End content wrapper:

request.writeBytes(this.crlf);
request.writeBytes(this.twoHyphens + this.boundary + 
    this.twoHyphens + this.crlf);

Flush output buffer:

request.flush();
request.close();

Get response:

InputStream responseStream = new 
    BufferedInputStream(httpUrlConnection.getInputStream());

BufferedReader responseStreamReader = 
    new BufferedReader(new InputStreamReader(responseStream));

String line = "";
StringBuilder stringBuilder = new StringBuilder();

while ((line = responseStreamReader.readLine()) != null) {
    stringBuilder.append(line).append("\n");
}
responseStreamReader.close();

String response = stringBuilder.toString();

Close response stream:

responseStream.close();

Close the connection:

httpUrlConnection.disconnect();

PS: Of course I had to wrap the request in private class AsyncUploadBitmaps extends AsyncTask<Bitmap, Void, String>, in order to make the Android platform happy, because it doesn't like to have network requests on the main thread.

Sorting a Dictionary in place with respect to keys

By design, dictionaries are not sortable. If you need this capability in a dictionary, look at SortedDictionary instead.

"Could not find acceptable representation" using spring-boot-starter-web

In my case I was sending in correct object in ResponseEntity<>().

Correct :

@PostMapping(value = "/get-customer-details", produces = { MediaType.APPLICATION_JSON_VALUE })
public ResponseEntity<?> getCustomerDetails(@RequestBody String requestMessage) throws JSONException {
    JSONObject jsonObject = new JSONObject();
    jsonObject.put("customerId", "123");
    jsonObject.put("mobileNumber", "XXX-XXX-XXXX");
    return new ResponseEntity<>(jsonObject.toString(), HttpStatus.OK);
}

Incorrect :

return new ResponseEntity<>(jsonObject, HttpStatus.OK);

Because, jsonObject's toString() method "Encodes the jsonObject as a compact JSON string". Therefore, Spring returns json string directly without any further serialization.

When we send jsonObject instead, Spring tries to serialize it based on produces method used in RequestMapping and fails due to it "Could not find acceptable representation".

Uncaught TypeError : cannot read property 'replace' of undefined In Grid

In my case, I was using a View that I´ve converted to partial view and I forgot to remove the template from "@section scripts". Removing the section block, solved my problem. This is because the sections aren´t rendered in partial views.

Modifying local variable from inside lambda

You can wrap it up to workaround the compiler but please remember that side effects in lambdas are discouraged.

To quote the javadoc

Side-effects in behavioral parameters to stream operations are, in general, discouraged, as they can often lead to unwitting violations of the statelessness requirement A small number of stream operations, such as forEach() and peek(), can operate only via side-effects; these should be used with care

Maven Install on Mac OS X

macOS Sierra onwards

brew install maven

What strategies and tools are useful for finding memory leaks in .NET?

Are you using unmanaged code? If you are not using unmanaged code, according to Microsoft, memory leaks in the traditional sense are not possible.

Memory used by an application may not be released however, so an application's memory allocation may grow throughout the life of the application.

From How to identify memory leaks in the common language runtime at Microsoft.com

A memory leak can occur in a .NET Framework application when you use unmanaged code as part of the application. This unmanaged code can leak memory, and the .NET Framework runtime cannot address that problem.

Additionally, a project may only appear to have a memory leak. This condition can occur if many large objects (such as DataTable objects) are declared and then added to a collection (such as a DataSet). The resources that these objects own may never be released, and the resources are left alive for the whole run of the program. This appears to be a leak, but actually it is just a symptom of the way that memory is being allocated in the program.

For dealing with this type of issue, you can implement IDisposable. If you want to see some of the strategies for dealing with memory management, I would suggest searching for IDisposable, XNA, memory management as game developers need to have more predictable garbage collection and so must force the GC to do its thing.

One common mistake is to not remove event handlers that subscribe to an object. An event handler subscription will prevent an object from being recycled. Also, take a look at the using statement which allows you to create a limited scope for a resource's lifetime.

Jackson: how to prevent field serialization

The easy way is to annotate your getters and setters.

Here is the original example modified to exclude the plain text password, but then annotate a new method that just returns the password field as encrypted text.

class User {

    private String password;

    public void setPassword(String password) {
        this.password = password;
    }

    @JsonIgnore
    public String getPassword() {
        return password;
    }

    @JsonProperty("password")
    public String getEncryptedPassword() {
        // encryption logic
    }
}

HTML form readonly SELECT tag/input

This is the best solution I have found:

$("#YourSELECTIdHere option:not(:selected)").prop("disabled", true);

The code above disables all other options not selected while keeping the selected option enabled. Doing so the selected option will make it into the post-back data.

How to find list intersection?

You can also use a counter! It doesn't preserve the order, but it'll consider the duplicates:

>>> from collections import Counter
>>> a = [1,2,3,4,5]
>>> b = [1,3,5,6]
>>> d1, d2 = Counter(a), Counter(b)
>>> c = [n for n in d1.keys() & d2.keys() for _ in range(min(d1[n], d2[n]))]
>>> print(c)
[1,3,5]

How to check if anonymous object has a method?

typeof myObj.prop2 === 'function'; will let you know if the function is defined.

if(typeof myObj.prop2 === 'function') {
    alert("It's a function");
} else if (typeof myObj.prop2 === 'undefined') {
    alert("It's undefined");
} else {
    alert("It's neither undefined nor a function. It's a " + typeof myObj.prop2);
}

Getting the WordPress Post ID of current post

global $post;
echo $post->ID;

Bootstrap 4 - Glyphicons migration?

Bootstrap 4 files do not come with the glyphicon support. But you can simply open up your bootstrap.css or bootstrap.min.css and paste this code which I came across here.

@font-face{font-family:'Glyphicons Halflings';src:url('https://netdna.bootstrapcdn.com/bootstrap/3.0.0/fonts/glyphicons-halflings-regular.eot');src:url('https://netdna.bootstrapcdn.com/bootstrap/3.0.0/fonts/glyphicons-halflings-regular.eot?#iefix') format('embedded-opentype'),url('https://netdna.bootstrapcdn.com/bootstrap/3.0.0/fonts/glyphicons-halflings-regular.woff') format('woff'),url('https://netdna.bootstrapcdn.com/bootstrap/3.0.0/fonts/glyphicons-halflings-regular.ttf') format('truetype'),url('https://netdna.bootstrapcdn.com/bootstrap/3.0.0/fonts/glyphicons-halflings-regular.svg#glyphicons-halflingsregular') format('svg');}.glyphicon{position:relative;top:1px;display:inline-block;font-family:'Glyphicons Halflings';font-style:normal;font-weight:normal;line-height:1;-webkit-font-smoothing:antialiased;}
.glyphicon-asterisk:before{content:"\2a";}
.glyphicon-plus:before{content:"\2b";}
.glyphicon-euro:before{content:"\20ac";}
.glyphicon-minus:before{content:"\2212";}
.glyphicon-cloud:before{content:"\2601";}
.glyphicon-envelope:before{content:"\2709";}
.glyphicon-pencil:before{content:"\270f";}
.glyphicon-glass:before{content:"\e001";}
.glyphicon-music:before{content:"\e002";}
.glyphicon-search:before{content:"\e003";}
.glyphicon-heart:before{content:"\e005";}
.glyphicon-star:before{content:"\e006";}
.glyphicon-star-empty:before{content:"\e007";}
.glyphicon-user:before{content:"\e008";}
.glyphicon-film:before{content:"\e009";}
.glyphicon-th-large:before{content:"\e010";}
.glyphicon-th:before{content:"\e011";}
.glyphicon-th-list:before{content:"\e012";}
.glyphicon-ok:before{content:"\e013";}
.glyphicon-remove:before{content:"\e014";}
.glyphicon-zoom-in:before{content:"\e015";}
.glyphicon-zoom-out:before{content:"\e016";}
.glyphicon-off:before{content:"\e017";}
.glyphicon-signal:before{content:"\e018";}
.glyphicon-cog:before{content:"\e019";}
.glyphicon-trash:before{content:"\e020";}
.glyphicon-home:before{content:"\e021";}
.glyphicon-file:before{content:"\e022";}
.glyphicon-time:before{content:"\e023";}
.glyphicon-road:before{content:"\e024";}
.glyphicon-download-alt:before{content:"\e025";}
.glyphicon-download:before{content:"\e026";}
.glyphicon-upload:before{content:"\e027";}
.glyphicon-inbox:before{content:"\e028";}
.glyphicon-play-circle:before{content:"\e029";}
.glyphicon-repeat:before{content:"\e030";}
.glyphicon-refresh:before{content:"\e031";}
.glyphicon-list-alt:before{content:"\e032";}
.glyphicon-flag:before{content:"\e034";}
.glyphicon-headphones:before{content:"\e035";}
.glyphicon-volume-off:before{content:"\e036";}
.glyphicon-volume-down:before{content:"\e037";}
.glyphicon-volume-up:before{content:"\e038";}
.glyphicon-qrcode:before{content:"\e039";}
.glyphicon-barcode:before{content:"\e040";}
.glyphicon-tag:before{content:"\e041";}
.glyphicon-tags:before{content:"\e042";}
.glyphicon-book:before{content:"\e043";}
.glyphicon-print:before{content:"\e045";}
.glyphicon-font:before{content:"\e047";}
.glyphicon-bold:before{content:"\e048";}
.glyphicon-italic:before{content:"\e049";}
.glyphicon-text-height:before{content:"\e050";}
.glyphicon-text-width:before{content:"\e051";}
.glyphicon-align-left:before{content:"\e052";}
.glyphicon-align-center:before{content:"\e053";}
.glyphicon-align-right:before{content:"\e054";}
.glyphicon-align-justify:before{content:"\e055";}
.glyphicon-list:before{content:"\e056";}
.glyphicon-indent-left:before{content:"\e057";}
.glyphicon-indent-right:before{content:"\e058";}
.glyphicon-facetime-video:before{content:"\e059";}
.glyphicon-picture:before{content:"\e060";}
.glyphicon-map-marker:before{content:"\e062";}
.glyphicon-adjust:before{content:"\e063";}
.glyphicon-tint:before{content:"\e064";}
.glyphicon-edit:before{content:"\e065";}
.glyphicon-share:before{content:"\e066";}
.glyphicon-check:before{content:"\e067";}
.glyphicon-move:before{content:"\e068";}
.glyphicon-step-backward:before{content:"\e069";}
.glyphicon-fast-backward:before{content:"\e070";}
.glyphicon-backward:before{content:"\e071";}
.glyphicon-play:before{content:"\e072";}
.glyphicon-pause:before{content:"\e073";}
.glyphicon-stop:before{content:"\e074";}
.glyphicon-forward:before{content:"\e075";}
.glyphicon-fast-forward:before{content:"\e076";}
.glyphicon-step-forward:before{content:"\e077";}
.glyphicon-eject:before{content:"\e078";}
.glyphicon-chevron-left:before{content:"\e079";}
.glyphicon-chevron-right:before{content:"\e080";}
.glyphicon-plus-sign:before{content:"\e081";}
.glyphicon-minus-sign:before{content:"\e082";}
.glyphicon-remove-sign:before{content:"\e083";}
.glyphicon-ok-sign:before{content:"\e084";}
.glyphicon-question-sign:before{content:"\e085";}
.glyphicon-info-sign:before{content:"\e086";}
.glyphicon-screenshot:before{content:"\e087";}
.glyphicon-remove-circle:before{content:"\e088";}
.glyphicon-ok-circle:before{content:"\e089";}
.glyphicon-ban-circle:before{content:"\e090";}
.glyphicon-arrow-left:before{content:"\e091";}
.glyphicon-arrow-right:before{content:"\e092";}
.glyphicon-arrow-up:before{content:"\e093";}
.glyphicon-arrow-down:before{content:"\e094";}
.glyphicon-share-alt:before{content:"\e095";}
.glyphicon-resize-full:before{content:"\e096";}
.glyphicon-resize-small:before{content:"\e097";}
.glyphicon-exclamation-sign:before{content:"\e101";}
.glyphicon-gift:before{content:"\e102";}
.glyphicon-leaf:before{content:"\e103";}
.glyphicon-eye-open:before{content:"\e105";}
.glyphicon-eye-close:before{content:"\e106";}
.glyphicon-warning-sign:before{content:"\e107";}
.glyphicon-plane:before{content:"\e108";}
.glyphicon-random:before{content:"\e110";}
.glyphicon-comment:before{content:"\e111";}
.glyphicon-magnet:before{content:"\e112";}
.glyphicon-chevron-up:before{content:"\e113";}
.glyphicon-chevron-down:before{content:"\e114";}
.glyphicon-retweet:before{content:"\e115";}
.glyphicon-shopping-cart:before{content:"\e116";}
.glyphicon-folder-close:before{content:"\e117";}
.glyphicon-folder-open:before{content:"\e118";}
.glyphicon-resize-vertical:before{content:"\e119";}
.glyphicon-resize-horizontal:before{content:"\e120";}
.glyphicon-hdd:before{content:"\e121";}
.glyphicon-bullhorn:before{content:"\e122";}
.glyphicon-certificate:before{content:"\e124";}
.glyphicon-thumbs-up:before{content:"\e125";}
.glyphicon-thumbs-down:before{content:"\e126";}
.glyphicon-hand-right:before{content:"\e127";}
.glyphicon-hand-left:before{content:"\e128";}
.glyphicon-hand-up:before{content:"\e129";}
.glyphicon-hand-down:before{content:"\e130";}
.glyphicon-circle-arrow-right:before{content:"\e131";}
.glyphicon-circle-arrow-left:before{content:"\e132";}
.glyphicon-circle-arrow-up:before{content:"\e133";}
.glyphicon-circle-arrow-down:before{content:"\e134";}
.glyphicon-globe:before{content:"\e135";}
.glyphicon-tasks:before{content:"\e137";}
.glyphicon-filter:before{content:"\e138";}
.glyphicon-fullscreen:before{content:"\e140";}
.glyphicon-dashboard:before{content:"\e141";}
.glyphicon-heart-empty:before{content:"\e143";}
.glyphicon-link:before{content:"\e144";}
.glyphicon-phone:before{content:"\e145";}
.glyphicon-usd:before{content:"\e148";}
.glyphicon-gbp:before{content:"\e149";}
.glyphicon-sort:before{content:"\e150";}
.glyphicon-sort-by-alphabet:before{content:"\e151";}
.glyphicon-sort-by-alphabet-alt:before{content:"\e152";}
.glyphicon-sort-by-order:before{content:"\e153";}
.glyphicon-sort-by-order-alt:before{content:"\e154";}
.glyphicon-sort-by-attributes:before{content:"\e155";}
.glyphicon-sort-by-attributes-alt:before{content:"\e156";}
.glyphicon-unchecked:before{content:"\e157";}
.glyphicon-expand:before{content:"\e158";}
.glyphicon-collapse-down:before{content:"\e159";}
.glyphicon-collapse-up:before{content:"\e160";}
.glyphicon-log-in:before{content:"\e161";}
.glyphicon-flash:before{content:"\e162";}
.glyphicon-log-out:before{content:"\e163";}
.glyphicon-new-window:before{content:"\e164";}
.glyphicon-record:before{content:"\e165";}
.glyphicon-save:before{content:"\e166";}
.glyphicon-open:before{content:"\e167";}
.glyphicon-saved:before{content:"\e168";}
.glyphicon-import:before{content:"\e169";}
.glyphicon-export:before{content:"\e170";}
.glyphicon-send:before{content:"\e171";}
.glyphicon-floppy-disk:before{content:"\e172";}
.glyphicon-floppy-saved:before{content:"\e173";}
.glyphicon-floppy-remove:before{content:"\e174";}
.glyphicon-floppy-save:before{content:"\e175";}
.glyphicon-floppy-open:before{content:"\e176";}
.glyphicon-credit-card:before{content:"\e177";}
.glyphicon-transfer:before{content:"\e178";}
.glyphicon-cutlery:before{content:"\e179";}
.glyphicon-header:before{content:"\e180";}
.glyphicon-compressed:before{content:"\e181";}
.glyphicon-earphone:before{content:"\e182";}
.glyphicon-phone-alt:before{content:"\e183";}
.glyphicon-tower:before{content:"\e184";}
.glyphicon-stats:before{content:"\e185";}
.glyphicon-sd-video:before{content:"\e186";}
.glyphicon-hd-video:before{content:"\e187";}
.glyphicon-subtitles:before{content:"\e188";}
.glyphicon-sound-stereo:before{content:"\e189";}
.glyphicon-sound-dolby:before{content:"\e190";}
.glyphicon-sound-5-1:before{content:"\e191";}
.glyphicon-sound-6-1:before{content:"\e192";}
.glyphicon-sound-7-1:before{content:"\e193";}
.glyphicon-copyright-mark:before{content:"\e194";}
.glyphicon-registration-mark:before{content:"\e195";}
.glyphicon-cloud-download:before{content:"\e197";}
.glyphicon-cloud-upload:before{content:"\e198";}
.glyphicon-tree-conifer:before{content:"\e199";}
.glyphicon-tree-deciduous:before{content:"\e200";}
.glyphicon-briefcase:before{content:"\1f4bc";}
.glyphicon-calendar:before{content:"\1f4c5";}
.glyphicon-pushpin:before{content:"\1f4cc";}
.glyphicon-paperclip:before{content:"\1f4ce";}
.glyphicon-camera:before{content:"\1f4f7";}
.glyphicon-lock:before{content:"\1f512";}
.glyphicon-bell:before{content:"\1f514";}
.glyphicon-bookmark:before{content:"\1f516";}
.glyphicon-fire:before{content:"\1f525";}
.glyphicon-wrench:before{content:"\1f527";}

Java - ignore exception and continue

You are already doing it in your code. Run this example below. The catch will "handle" the exception, and you can move forward, assuming whatever you caught and handled did not break code down the road which you did not anticipate.

 try{
      throw new Exception();
 }catch (Exception ex){
   ex.printStackTrace();
 }
 System.out.println("Made it!");

However, you should always handle an exception properly. You can get yourself into some pretty messy situations and write difficult to maintain code by "ignoring" exceptions. You should only do this if you are actually handling whatever went wrong with the exception to the point that it really does not affect the rest of the program.

React setState not updating state

I had an issue when setting react state multiple times (it always used default state). Following this react/github issue worked for me

const [state, setState] = useState({
  foo: "abc",
  bar: 123
});

// Do this!
setState(prevState => {
  return {
    ...prevState,
    foo: "def"
  };
});
setState(prevState => {
  return {
    ...prevState,
    bar: 456
  };
});

How can I capitalize the first letter of each word in a string?

The suggested method str.title() does not work in all cases. For example:

string = "a b 3c"
string.title()
> "A B 3C"

instead of "A B 3c".

I think, it is better to do something like this:

def capitalize_words(string):
    words = string.split(" ") # just change the split(" ") method
    return ' '.join([word.capitalize() for word in words])

capitalize_words(string)
>'A B 3c'

Convert R vector to string vector of 1 element

Use the collapse argument to paste:

paste(a,collapse=" ")
[1] "aa bb cc"

How to append data to a json file?

import jsonlines

object1 = {
               "name": "name1",
               "url": "url1"
          }

object2 = {
               "name": "name2",
               "url": "url2"
          }   


# filename.jsonl is the name of the file
with jsonlines.open("filename.jsonl", "a") as writer:   # for writing
    writer.write(object1)
    writer.write(object2)

with jsonlines.open('filename.jsonl') as reader:      # for reading
    for obj in reader:
        print(obj)

visit for more info https://jsonlines.readthedocs.io/en/latest/

Smooth scroll to div id jQuery

Here is my solution to smooth scroll to div / anchor using jQuery in case you have a fixed header so that it doesn't scroll underneath it. Also it works if you link it from other page.

Just replace ".site-header" to div that contains your header.

$(function() {

$('a[href*="#"]:not([href="#"])').click(function() {
var headerheight = $(".site-header").outerHeight();
if (location.pathname.replace(/^\//,'') == this.pathname.replace(/^\//,'') && location.hostname == this.hostname) {
  var target = $(this.hash);
  target = target.length ? target : $('[name=' + this.hash.slice(1) +']');

  if (target.length) {
    $('html, body').animate({
      scrollTop: (target.offset().top - headerheight)
    }, 1000);
    return false;
  }
}
});

//Executed on page load with URL containing an anchor tag.
if($(location.href.split("#")[1])) {
var headerheight = $(".site-header").outerHeight();
  var target = $('#'+location.href.split("#")[1]);
  if (target.length) {
    $('html,body').animate({
      scrollTop: target.offset().top - headerheight
    }, 1);
    return false;
  }
}
});

How do I get my accordion to load with all the menus closed?

Make a borderless form movable?

WPF only

don't have the exact code to hand, but in a recent project I think I used MouseDown event and simply put this:

frmBorderless.DragMove();

Window.DragMove Method (MSDN)

Make body have 100% of the browser height

After testing various scenarios, I believe this is the best solution:

html {
    width: 100%;
    height: 100%;
    display: table;
}

body {
    width: 100%;
    display: table-cell;
}

html, body {
    margin: 0px;
    padding: 0px;
}

It is dynamic in that the html and the body elements will expand automatically if their contents overflow. I tested this in the latest version of Firefox, Chrome, and IE 11.

See the full fiddle here (for you table haters out there, you can always change it to use a div):

https://jsfiddle.net/71yp4rh1/9/

With that being said, there are several issues with the answers posted here.

html, body {
    height: 100%;
}

Using the above CSS will cause the html and the body element to NOT automatically expand if their contents overflow as shown here:

https://jsfiddle.net/9vyy620m/4/

As you scroll, notice the repeating background? This is happening because the body element's height has NOT increased due to its child table overflowing. Why doesn't it expand like any other block element? I'm not sure. I think browsers handle this incorrectly.

html {
    height: 100%;
}

body {
    min-height: 100%;
}

Setting a min-height of 100% on the body as shown above causes other problems. If you do this, you cannot specify that a child div or table take up a percentage height as shown here:

https://jsfiddle.net/aq74v2v7/4/

Hope this helps someone. I think browsers are handling this incorrectly. I would expect the body's height to automatically adjust growing larger if its children overflow. However, that doesn't seem to happen when you use 100% height and 100% width.

Adding values to specific DataTable cells

You mean you want to add a new row and only put data in a certain column? Try the following:

var row = dataTable.NewRow();
row[myColumn].Value = "my new value";
dataTable.Add(row);

As it is a data table, though, there will always be data of some kind in every column. It just might be DBNull.Value instead of whatever data type you imagine it would be.

How can I clear the terminal in Visual Studio Code?

FOR VERSIONS AT AND ABOVE v1.32 SEE BELOW

Bindings for this command still need to be setup manually, even at v1.33.1, which I am at. The command is there under Terminal: Clear but the binding is blank. Here is how you can setup bindings in v1.32 and up.

Open up the Keyboard Shortcuts with Ctrl+K, Ctrl+S. Then click on the {} next to the Keyboard Shortcuts tab to open up the keybindings.json file.

After doing so, find some open space anywhere in the file, and type in the key bind below.

{
    "key": "ctrl+k",
    "command": "workbench.action.terminal.clear",
    "when": "terminalFocus"
}

FOR VERSIONS UP TO v1.32 SEE BELOW

This is for Visual Studio Code v1.18 up to v1.32, I believe; I am on v1.29.1. Since apparently there are a whole lot of assumptions about the default bindings, here is how you set up a binding, then use it. Keep in mind this binding will completely delete all of the history in your terminal too.

Open up the Keyboard Shortcuts with Ctrl+K, Ctrl+S. Once you are in Keyboard Shortcuts, click on keybindings.json in the text that says ....open and edit keybindings.json. Then on the RIGHT side, in the keybindings.json, add this (make sure you put a comma before the first { if there are one or more bindings already):

{
    "key": "ctrl+k",
    "command": "workbench.action.terminal.clear",
    "when": "terminalFocus"
}

FOR ALL VERSIONS

Remember, the "key": can be whatever binding you want. It doesn't HAVE to be Ctrl + K.

To use the keybinding, you must have focus in your terminal, and then do the binding.

Programs & Examples On #Rhel5

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How to fill in proxy information in cntlm config file?

What is cntlm?

Why cntlm?

Install cntlm

Note! Username and domain

Generate password hash

Verify your generated hash is valid

Change configuration file

Note! newline at the end of cntlm.ini

Set your environment variables

Check that your cntlm works

Restart your machine

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document.location

document.location.href

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